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[PATCH] drivers/char: Use ARRAY_SIZE macro
[deliverable/linux.git] / drivers / char / synclinkmp.c
1 /*
2 * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
3 *
4 * Device driver for Microgate SyncLink Multiport
5 * high speed multiprotocol serial adapter.
6 *
7 * written by Paul Fulghum for Microgate Corporation
8 * paulkf@microgate.com
9 *
10 * Microgate and SyncLink are trademarks of Microgate Corporation
11 *
12 * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
13 * This code is released under the GNU General Public License (GPL)
14 *
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
25 * OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
29 #if defined(__i386__)
30 # define BREAKPOINT() asm(" int $3");
31 #else
32 # define BREAKPOINT() { }
33 #endif
34
35 #define MAX_DEVICES 12
36
37 #include <linux/config.h>
38 #include <linux/module.h>
39 #include <linux/errno.h>
40 #include <linux/signal.h>
41 #include <linux/sched.h>
42 #include <linux/timer.h>
43 #include <linux/interrupt.h>
44 #include <linux/pci.h>
45 #include <linux/tty.h>
46 #include <linux/tty_flip.h>
47 #include <linux/serial.h>
48 #include <linux/major.h>
49 #include <linux/string.h>
50 #include <linux/fcntl.h>
51 #include <linux/ptrace.h>
52 #include <linux/ioport.h>
53 #include <linux/mm.h>
54 #include <linux/slab.h>
55 #include <linux/netdevice.h>
56 #include <linux/vmalloc.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/ioctl.h>
60
61 #include <asm/system.h>
62 #include <asm/io.h>
63 #include <asm/irq.h>
64 #include <asm/dma.h>
65 #include <linux/bitops.h>
66 #include <asm/types.h>
67 #include <linux/termios.h>
68 #include <linux/workqueue.h>
69 #include <linux/hdlc.h>
70
71 #ifdef CONFIG_HDLC_MODULE
72 #define CONFIG_HDLC 1
73 #endif
74
75 #define GET_USER(error,value,addr) error = get_user(value,addr)
76 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
77 #define PUT_USER(error,value,addr) error = put_user(value,addr)
78 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
79
80 #include <asm/uaccess.h>
81
82 #include "linux/synclink.h"
83
84 static MGSL_PARAMS default_params = {
85 MGSL_MODE_HDLC, /* unsigned long mode */
86 0, /* unsigned char loopback; */
87 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
88 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
89 0, /* unsigned long clock_speed; */
90 0xff, /* unsigned char addr_filter; */
91 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
92 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
93 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
94 9600, /* unsigned long data_rate; */
95 8, /* unsigned char data_bits; */
96 1, /* unsigned char stop_bits; */
97 ASYNC_PARITY_NONE /* unsigned char parity; */
98 };
99
100 /* size in bytes of DMA data buffers */
101 #define SCABUFSIZE 1024
102 #define SCA_MEM_SIZE 0x40000
103 #define SCA_BASE_SIZE 512
104 #define SCA_REG_SIZE 16
105 #define SCA_MAX_PORTS 4
106 #define SCAMAXDESC 128
107
108 #define BUFFERLISTSIZE 4096
109
110 /* SCA-I style DMA buffer descriptor */
111 typedef struct _SCADESC
112 {
113 u16 next; /* lower l6 bits of next descriptor addr */
114 u16 buf_ptr; /* lower 16 bits of buffer addr */
115 u8 buf_base; /* upper 8 bits of buffer addr */
116 u8 pad1;
117 u16 length; /* length of buffer */
118 u8 status; /* status of buffer */
119 u8 pad2;
120 } SCADESC, *PSCADESC;
121
122 typedef struct _SCADESC_EX
123 {
124 /* device driver bookkeeping section */
125 char *virt_addr; /* virtual address of data buffer */
126 u16 phys_entry; /* lower 16-bits of physical address of this descriptor */
127 } SCADESC_EX, *PSCADESC_EX;
128
129 /* The queue of BH actions to be performed */
130
131 #define BH_RECEIVE 1
132 #define BH_TRANSMIT 2
133 #define BH_STATUS 4
134
135 #define IO_PIN_SHUTDOWN_LIMIT 100
136
137 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
138
139 struct _input_signal_events {
140 int ri_up;
141 int ri_down;
142 int dsr_up;
143 int dsr_down;
144 int dcd_up;
145 int dcd_down;
146 int cts_up;
147 int cts_down;
148 };
149
150 /*
151 * Device instance data structure
152 */
153 typedef struct _synclinkmp_info {
154 void *if_ptr; /* General purpose pointer (used by SPPP) */
155 int magic;
156 int flags;
157 int count; /* count of opens */
158 int line;
159 unsigned short close_delay;
160 unsigned short closing_wait; /* time to wait before closing */
161
162 struct mgsl_icount icount;
163
164 struct tty_struct *tty;
165 int timeout;
166 int x_char; /* xon/xoff character */
167 int blocked_open; /* # of blocked opens */
168 u16 read_status_mask1; /* break detection (SR1 indications) */
169 u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */
170 unsigned char ignore_status_mask1; /* break detection (SR1 indications) */
171 unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */
172 unsigned char *tx_buf;
173 int tx_put;
174 int tx_get;
175 int tx_count;
176
177 wait_queue_head_t open_wait;
178 wait_queue_head_t close_wait;
179
180 wait_queue_head_t status_event_wait_q;
181 wait_queue_head_t event_wait_q;
182 struct timer_list tx_timer; /* HDLC transmit timeout timer */
183 struct _synclinkmp_info *next_device; /* device list link */
184 struct timer_list status_timer; /* input signal status check timer */
185
186 spinlock_t lock; /* spinlock for synchronizing with ISR */
187 struct work_struct task; /* task structure for scheduling bh */
188
189 u32 max_frame_size; /* as set by device config */
190
191 u32 pending_bh;
192
193 int bh_running; /* Protection from multiple */
194 int isr_overflow;
195 int bh_requested;
196
197 int dcd_chkcount; /* check counts to prevent */
198 int cts_chkcount; /* too many IRQs if a signal */
199 int dsr_chkcount; /* is floating */
200 int ri_chkcount;
201
202 char *buffer_list; /* virtual address of Rx & Tx buffer lists */
203 unsigned long buffer_list_phys;
204
205 unsigned int rx_buf_count; /* count of total allocated Rx buffers */
206 SCADESC *rx_buf_list; /* list of receive buffer entries */
207 SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */
208 unsigned int current_rx_buf;
209
210 unsigned int tx_buf_count; /* count of total allocated Tx buffers */
211 SCADESC *tx_buf_list; /* list of transmit buffer entries */
212 SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */
213 unsigned int last_tx_buf;
214
215 unsigned char *tmp_rx_buf;
216 unsigned int tmp_rx_buf_count;
217
218 int rx_enabled;
219 int rx_overflow;
220
221 int tx_enabled;
222 int tx_active;
223 u32 idle_mode;
224
225 unsigned char ie0_value;
226 unsigned char ie1_value;
227 unsigned char ie2_value;
228 unsigned char ctrlreg_value;
229 unsigned char old_signals;
230
231 char device_name[25]; /* device instance name */
232
233 int port_count;
234 int adapter_num;
235 int port_num;
236
237 struct _synclinkmp_info *port_array[SCA_MAX_PORTS];
238
239 unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
240
241 unsigned int irq_level; /* interrupt level */
242 unsigned long irq_flags;
243 int irq_requested; /* nonzero if IRQ requested */
244
245 MGSL_PARAMS params; /* communications parameters */
246
247 unsigned char serial_signals; /* current serial signal states */
248
249 int irq_occurred; /* for diagnostics use */
250 unsigned int init_error; /* Initialization startup error */
251
252 u32 last_mem_alloc;
253 unsigned char* memory_base; /* shared memory address (PCI only) */
254 u32 phys_memory_base;
255 int shared_mem_requested;
256
257 unsigned char* sca_base; /* HD64570 SCA Memory address */
258 u32 phys_sca_base;
259 u32 sca_offset;
260 int sca_base_requested;
261
262 unsigned char* lcr_base; /* local config registers (PCI only) */
263 u32 phys_lcr_base;
264 u32 lcr_offset;
265 int lcr_mem_requested;
266
267 unsigned char* statctrl_base; /* status/control register memory */
268 u32 phys_statctrl_base;
269 u32 statctrl_offset;
270 int sca_statctrl_requested;
271
272 u32 misc_ctrl_value;
273 char flag_buf[MAX_ASYNC_BUFFER_SIZE];
274 char char_buf[MAX_ASYNC_BUFFER_SIZE];
275 BOOLEAN drop_rts_on_tx_done;
276
277 struct _input_signal_events input_signal_events;
278
279 /* SPPP/Cisco HDLC device parts */
280 int netcount;
281 int dosyncppp;
282 spinlock_t netlock;
283
284 #ifdef CONFIG_HDLC
285 struct net_device *netdev;
286 #endif
287
288 } SLMP_INFO;
289
290 #define MGSL_MAGIC 0x5401
291
292 /*
293 * define serial signal status change macros
294 */
295 #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */
296 #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */
297 #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */
298 #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */
299
300 /* Common Register macros */
301 #define LPR 0x00
302 #define PABR0 0x02
303 #define PABR1 0x03
304 #define WCRL 0x04
305 #define WCRM 0x05
306 #define WCRH 0x06
307 #define DPCR 0x08
308 #define DMER 0x09
309 #define ISR0 0x10
310 #define ISR1 0x11
311 #define ISR2 0x12
312 #define IER0 0x14
313 #define IER1 0x15
314 #define IER2 0x16
315 #define ITCR 0x18
316 #define INTVR 0x1a
317 #define IMVR 0x1c
318
319 /* MSCI Register macros */
320 #define TRB 0x20
321 #define TRBL 0x20
322 #define TRBH 0x21
323 #define SR0 0x22
324 #define SR1 0x23
325 #define SR2 0x24
326 #define SR3 0x25
327 #define FST 0x26
328 #define IE0 0x28
329 #define IE1 0x29
330 #define IE2 0x2a
331 #define FIE 0x2b
332 #define CMD 0x2c
333 #define MD0 0x2e
334 #define MD1 0x2f
335 #define MD2 0x30
336 #define CTL 0x31
337 #define SA0 0x32
338 #define SA1 0x33
339 #define IDL 0x34
340 #define TMC 0x35
341 #define RXS 0x36
342 #define TXS 0x37
343 #define TRC0 0x38
344 #define TRC1 0x39
345 #define RRC 0x3a
346 #define CST0 0x3c
347 #define CST1 0x3d
348
349 /* Timer Register Macros */
350 #define TCNT 0x60
351 #define TCNTL 0x60
352 #define TCNTH 0x61
353 #define TCONR 0x62
354 #define TCONRL 0x62
355 #define TCONRH 0x63
356 #define TMCS 0x64
357 #define TEPR 0x65
358
359 /* DMA Controller Register macros */
360 #define DARL 0x80
361 #define DARH 0x81
362 #define DARB 0x82
363 #define BAR 0x80
364 #define BARL 0x80
365 #define BARH 0x81
366 #define BARB 0x82
367 #define SAR 0x84
368 #define SARL 0x84
369 #define SARH 0x85
370 #define SARB 0x86
371 #define CPB 0x86
372 #define CDA 0x88
373 #define CDAL 0x88
374 #define CDAH 0x89
375 #define EDA 0x8a
376 #define EDAL 0x8a
377 #define EDAH 0x8b
378 #define BFL 0x8c
379 #define BFLL 0x8c
380 #define BFLH 0x8d
381 #define BCR 0x8e
382 #define BCRL 0x8e
383 #define BCRH 0x8f
384 #define DSR 0x90
385 #define DMR 0x91
386 #define FCT 0x93
387 #define DIR 0x94
388 #define DCMD 0x95
389
390 /* combine with timer or DMA register address */
391 #define TIMER0 0x00
392 #define TIMER1 0x08
393 #define TIMER2 0x10
394 #define TIMER3 0x18
395 #define RXDMA 0x00
396 #define TXDMA 0x20
397
398 /* SCA Command Codes */
399 #define NOOP 0x00
400 #define TXRESET 0x01
401 #define TXENABLE 0x02
402 #define TXDISABLE 0x03
403 #define TXCRCINIT 0x04
404 #define TXCRCEXCL 0x05
405 #define TXEOM 0x06
406 #define TXABORT 0x07
407 #define MPON 0x08
408 #define TXBUFCLR 0x09
409 #define RXRESET 0x11
410 #define RXENABLE 0x12
411 #define RXDISABLE 0x13
412 #define RXCRCINIT 0x14
413 #define RXREJECT 0x15
414 #define SEARCHMP 0x16
415 #define RXCRCEXCL 0x17
416 #define RXCRCCALC 0x18
417 #define CHRESET 0x21
418 #define HUNT 0x31
419
420 /* DMA command codes */
421 #define SWABORT 0x01
422 #define FEICLEAR 0x02
423
424 /* IE0 */
425 #define TXINTE BIT7
426 #define RXINTE BIT6
427 #define TXRDYE BIT1
428 #define RXRDYE BIT0
429
430 /* IE1 & SR1 */
431 #define UDRN BIT7
432 #define IDLE BIT6
433 #define SYNCD BIT4
434 #define FLGD BIT4
435 #define CCTS BIT3
436 #define CDCD BIT2
437 #define BRKD BIT1
438 #define ABTD BIT1
439 #define GAPD BIT1
440 #define BRKE BIT0
441 #define IDLD BIT0
442
443 /* IE2 & SR2 */
444 #define EOM BIT7
445 #define PMP BIT6
446 #define SHRT BIT6
447 #define PE BIT5
448 #define ABT BIT5
449 #define FRME BIT4
450 #define RBIT BIT4
451 #define OVRN BIT3
452 #define CRCE BIT2
453
454
455 /*
456 * Global linked list of SyncLink devices
457 */
458 static SLMP_INFO *synclinkmp_device_list = NULL;
459 static int synclinkmp_adapter_count = -1;
460 static int synclinkmp_device_count = 0;
461
462 /*
463 * Set this param to non-zero to load eax with the
464 * .text section address and breakpoint on module load.
465 * This is useful for use with gdb and add-symbol-file command.
466 */
467 static int break_on_load=0;
468
469 /*
470 * Driver major number, defaults to zero to get auto
471 * assigned major number. May be forced as module parameter.
472 */
473 static int ttymajor=0;
474
475 /*
476 * Array of user specified options for ISA adapters.
477 */
478 static int debug_level = 0;
479 static int maxframe[MAX_DEVICES] = {0,};
480 static int dosyncppp[MAX_DEVICES] = {0,};
481
482 module_param(break_on_load, bool, 0);
483 module_param(ttymajor, int, 0);
484 module_param(debug_level, int, 0);
485 module_param_array(maxframe, int, NULL, 0);
486 module_param_array(dosyncppp, int, NULL, 0);
487
488 static char *driver_name = "SyncLink MultiPort driver";
489 static char *driver_version = "$Revision: 4.38 $";
490
491 static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent);
492 static void synclinkmp_remove_one(struct pci_dev *dev);
493
494 static struct pci_device_id synclinkmp_pci_tbl[] = {
495 { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, },
496 { 0, }, /* terminate list */
497 };
498 MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl);
499
500 MODULE_LICENSE("GPL");
501
502 static struct pci_driver synclinkmp_pci_driver = {
503 .name = "synclinkmp",
504 .id_table = synclinkmp_pci_tbl,
505 .probe = synclinkmp_init_one,
506 .remove = __devexit_p(synclinkmp_remove_one),
507 };
508
509
510 static struct tty_driver *serial_driver;
511
512 /* number of characters left in xmit buffer before we ask for more */
513 #define WAKEUP_CHARS 256
514
515
516 /* tty callbacks */
517
518 static int open(struct tty_struct *tty, struct file * filp);
519 static void close(struct tty_struct *tty, struct file * filp);
520 static void hangup(struct tty_struct *tty);
521 static void set_termios(struct tty_struct *tty, struct termios *old_termios);
522
523 static int write(struct tty_struct *tty, const unsigned char *buf, int count);
524 static void put_char(struct tty_struct *tty, unsigned char ch);
525 static void send_xchar(struct tty_struct *tty, char ch);
526 static void wait_until_sent(struct tty_struct *tty, int timeout);
527 static int write_room(struct tty_struct *tty);
528 static void flush_chars(struct tty_struct *tty);
529 static void flush_buffer(struct tty_struct *tty);
530 static void tx_hold(struct tty_struct *tty);
531 static void tx_release(struct tty_struct *tty);
532
533 static int ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
534 static int read_proc(char *page, char **start, off_t off, int count,int *eof, void *data);
535 static int chars_in_buffer(struct tty_struct *tty);
536 static void throttle(struct tty_struct * tty);
537 static void unthrottle(struct tty_struct * tty);
538 static void set_break(struct tty_struct *tty, int break_state);
539
540 #ifdef CONFIG_HDLC
541 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
542 static void hdlcdev_tx_done(SLMP_INFO *info);
543 static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size);
544 static int hdlcdev_init(SLMP_INFO *info);
545 static void hdlcdev_exit(SLMP_INFO *info);
546 #endif
547
548 /* ioctl handlers */
549
550 static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount);
551 static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
552 static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
553 static int get_txidle(SLMP_INFO *info, int __user *idle_mode);
554 static int set_txidle(SLMP_INFO *info, int idle_mode);
555 static int tx_enable(SLMP_INFO *info, int enable);
556 static int tx_abort(SLMP_INFO *info);
557 static int rx_enable(SLMP_INFO *info, int enable);
558 static int modem_input_wait(SLMP_INFO *info,int arg);
559 static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr);
560 static int tiocmget(struct tty_struct *tty, struct file *file);
561 static int tiocmset(struct tty_struct *tty, struct file *file,
562 unsigned int set, unsigned int clear);
563 static void set_break(struct tty_struct *tty, int break_state);
564
565 static void add_device(SLMP_INFO *info);
566 static void device_init(int adapter_num, struct pci_dev *pdev);
567 static int claim_resources(SLMP_INFO *info);
568 static void release_resources(SLMP_INFO *info);
569
570 static int startup(SLMP_INFO *info);
571 static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
572 static void shutdown(SLMP_INFO *info);
573 static void program_hw(SLMP_INFO *info);
574 static void change_params(SLMP_INFO *info);
575
576 static int init_adapter(SLMP_INFO *info);
577 static int register_test(SLMP_INFO *info);
578 static int irq_test(SLMP_INFO *info);
579 static int loopback_test(SLMP_INFO *info);
580 static int adapter_test(SLMP_INFO *info);
581 static int memory_test(SLMP_INFO *info);
582
583 static void reset_adapter(SLMP_INFO *info);
584 static void reset_port(SLMP_INFO *info);
585 static void async_mode(SLMP_INFO *info);
586 static void hdlc_mode(SLMP_INFO *info);
587
588 static void rx_stop(SLMP_INFO *info);
589 static void rx_start(SLMP_INFO *info);
590 static void rx_reset_buffers(SLMP_INFO *info);
591 static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last);
592 static int rx_get_frame(SLMP_INFO *info);
593
594 static void tx_start(SLMP_INFO *info);
595 static void tx_stop(SLMP_INFO *info);
596 static void tx_load_fifo(SLMP_INFO *info);
597 static void tx_set_idle(SLMP_INFO *info);
598 static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count);
599
600 static void get_signals(SLMP_INFO *info);
601 static void set_signals(SLMP_INFO *info);
602 static void enable_loopback(SLMP_INFO *info, int enable);
603 static void set_rate(SLMP_INFO *info, u32 data_rate);
604
605 static int bh_action(SLMP_INFO *info);
606 static void bh_handler(void* Context);
607 static void bh_receive(SLMP_INFO *info);
608 static void bh_transmit(SLMP_INFO *info);
609 static void bh_status(SLMP_INFO *info);
610 static void isr_timer(SLMP_INFO *info);
611 static void isr_rxint(SLMP_INFO *info);
612 static void isr_rxrdy(SLMP_INFO *info);
613 static void isr_txint(SLMP_INFO *info);
614 static void isr_txrdy(SLMP_INFO *info);
615 static void isr_rxdmaok(SLMP_INFO *info);
616 static void isr_rxdmaerror(SLMP_INFO *info);
617 static void isr_txdmaok(SLMP_INFO *info);
618 static void isr_txdmaerror(SLMP_INFO *info);
619 static void isr_io_pin(SLMP_INFO *info, u16 status);
620
621 static int alloc_dma_bufs(SLMP_INFO *info);
622 static void free_dma_bufs(SLMP_INFO *info);
623 static int alloc_buf_list(SLMP_INFO *info);
624 static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count);
625 static int alloc_tmp_rx_buf(SLMP_INFO *info);
626 static void free_tmp_rx_buf(SLMP_INFO *info);
627
628 static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count);
629 static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit);
630 static void tx_timeout(unsigned long context);
631 static void status_timeout(unsigned long context);
632
633 static unsigned char read_reg(SLMP_INFO *info, unsigned char addr);
634 static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val);
635 static u16 read_reg16(SLMP_INFO *info, unsigned char addr);
636 static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val);
637 static unsigned char read_status_reg(SLMP_INFO * info);
638 static void write_control_reg(SLMP_INFO * info);
639
640
641 static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes
642 static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes
643 static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes
644
645 static u32 misc_ctrl_value = 0x007e4040;
646 static u32 lcr1_brdr_value = 0x00800028;
647
648 static u32 read_ahead_count = 8;
649
650 /* DPCR, DMA Priority Control
651 *
652 * 07..05 Not used, must be 0
653 * 04 BRC, bus release condition: 0=all transfers complete
654 * 1=release after 1 xfer on all channels
655 * 03 CCC, channel change condition: 0=every cycle
656 * 1=after each channel completes all xfers
657 * 02..00 PR<2..0>, priority 100=round robin
658 *
659 * 00000100 = 0x00
660 */
661 static unsigned char dma_priority = 0x04;
662
663 // Number of bytes that can be written to shared RAM
664 // in a single write operation
665 static u32 sca_pci_load_interval = 64;
666
667 /*
668 * 1st function defined in .text section. Calling this function in
669 * init_module() followed by a breakpoint allows a remote debugger
670 * (gdb) to get the .text address for the add-symbol-file command.
671 * This allows remote debugging of dynamically loadable modules.
672 */
673 static void* synclinkmp_get_text_ptr(void);
674 static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;}
675
676 static inline int sanity_check(SLMP_INFO *info,
677 char *name, const char *routine)
678 {
679 #ifdef SANITY_CHECK
680 static const char *badmagic =
681 "Warning: bad magic number for synclinkmp_struct (%s) in %s\n";
682 static const char *badinfo =
683 "Warning: null synclinkmp_struct for (%s) in %s\n";
684
685 if (!info) {
686 printk(badinfo, name, routine);
687 return 1;
688 }
689 if (info->magic != MGSL_MAGIC) {
690 printk(badmagic, name, routine);
691 return 1;
692 }
693 #else
694 if (!info)
695 return 1;
696 #endif
697 return 0;
698 }
699
700 /**
701 * line discipline callback wrappers
702 *
703 * The wrappers maintain line discipline references
704 * while calling into the line discipline.
705 *
706 * ldisc_receive_buf - pass receive data to line discipline
707 */
708
709 static void ldisc_receive_buf(struct tty_struct *tty,
710 const __u8 *data, char *flags, int count)
711 {
712 struct tty_ldisc *ld;
713 if (!tty)
714 return;
715 ld = tty_ldisc_ref(tty);
716 if (ld) {
717 if (ld->receive_buf)
718 ld->receive_buf(tty, data, flags, count);
719 tty_ldisc_deref(ld);
720 }
721 }
722
723 /* tty callbacks */
724
725 /* Called when a port is opened. Init and enable port.
726 */
727 static int open(struct tty_struct *tty, struct file *filp)
728 {
729 SLMP_INFO *info;
730 int retval, line;
731 unsigned long flags;
732
733 line = tty->index;
734 if ((line < 0) || (line >= synclinkmp_device_count)) {
735 printk("%s(%d): open with invalid line #%d.\n",
736 __FILE__,__LINE__,line);
737 return -ENODEV;
738 }
739
740 info = synclinkmp_device_list;
741 while(info && info->line != line)
742 info = info->next_device;
743 if (sanity_check(info, tty->name, "open"))
744 return -ENODEV;
745 if ( info->init_error ) {
746 printk("%s(%d):%s device is not allocated, init error=%d\n",
747 __FILE__,__LINE__,info->device_name,info->init_error);
748 return -ENODEV;
749 }
750
751 tty->driver_data = info;
752 info->tty = tty;
753
754 if (debug_level >= DEBUG_LEVEL_INFO)
755 printk("%s(%d):%s open(), old ref count = %d\n",
756 __FILE__,__LINE__,tty->driver->name, info->count);
757
758 /* If port is closing, signal caller to try again */
759 if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){
760 if (info->flags & ASYNC_CLOSING)
761 interruptible_sleep_on(&info->close_wait);
762 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
763 -EAGAIN : -ERESTARTSYS);
764 goto cleanup;
765 }
766
767 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
768
769 spin_lock_irqsave(&info->netlock, flags);
770 if (info->netcount) {
771 retval = -EBUSY;
772 spin_unlock_irqrestore(&info->netlock, flags);
773 goto cleanup;
774 }
775 info->count++;
776 spin_unlock_irqrestore(&info->netlock, flags);
777
778 if (info->count == 1) {
779 /* 1st open on this device, init hardware */
780 retval = startup(info);
781 if (retval < 0)
782 goto cleanup;
783 }
784
785 retval = block_til_ready(tty, filp, info);
786 if (retval) {
787 if (debug_level >= DEBUG_LEVEL_INFO)
788 printk("%s(%d):%s block_til_ready() returned %d\n",
789 __FILE__,__LINE__, info->device_name, retval);
790 goto cleanup;
791 }
792
793 if (debug_level >= DEBUG_LEVEL_INFO)
794 printk("%s(%d):%s open() success\n",
795 __FILE__,__LINE__, info->device_name);
796 retval = 0;
797
798 cleanup:
799 if (retval) {
800 if (tty->count == 1)
801 info->tty = NULL; /* tty layer will release tty struct */
802 if(info->count)
803 info->count--;
804 }
805
806 return retval;
807 }
808
809 /* Called when port is closed. Wait for remaining data to be
810 * sent. Disable port and free resources.
811 */
812 static void close(struct tty_struct *tty, struct file *filp)
813 {
814 SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
815
816 if (sanity_check(info, tty->name, "close"))
817 return;
818
819 if (debug_level >= DEBUG_LEVEL_INFO)
820 printk("%s(%d):%s close() entry, count=%d\n",
821 __FILE__,__LINE__, info->device_name, info->count);
822
823 if (!info->count)
824 return;
825
826 if (tty_hung_up_p(filp))
827 goto cleanup;
828
829 if ((tty->count == 1) && (info->count != 1)) {
830 /*
831 * tty->count is 1 and the tty structure will be freed.
832 * info->count should be one in this case.
833 * if it's not, correct it so that the port is shutdown.
834 */
835 printk("%s(%d):%s close: bad refcount; tty->count is 1, "
836 "info->count is %d\n",
837 __FILE__,__LINE__, info->device_name, info->count);
838 info->count = 1;
839 }
840
841 info->count--;
842
843 /* if at least one open remaining, leave hardware active */
844 if (info->count)
845 goto cleanup;
846
847 info->flags |= ASYNC_CLOSING;
848
849 /* set tty->closing to notify line discipline to
850 * only process XON/XOFF characters. Only the N_TTY
851 * discipline appears to use this (ppp does not).
852 */
853 tty->closing = 1;
854
855 /* wait for transmit data to clear all layers */
856
857 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
858 if (debug_level >= DEBUG_LEVEL_INFO)
859 printk("%s(%d):%s close() calling tty_wait_until_sent\n",
860 __FILE__,__LINE__, info->device_name );
861 tty_wait_until_sent(tty, info->closing_wait);
862 }
863
864 if (info->flags & ASYNC_INITIALIZED)
865 wait_until_sent(tty, info->timeout);
866
867 if (tty->driver->flush_buffer)
868 tty->driver->flush_buffer(tty);
869
870 tty_ldisc_flush(tty);
871
872 shutdown(info);
873
874 tty->closing = 0;
875 info->tty = NULL;
876
877 if (info->blocked_open) {
878 if (info->close_delay) {
879 msleep_interruptible(jiffies_to_msecs(info->close_delay));
880 }
881 wake_up_interruptible(&info->open_wait);
882 }
883
884 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
885
886 wake_up_interruptible(&info->close_wait);
887
888 cleanup:
889 if (debug_level >= DEBUG_LEVEL_INFO)
890 printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
891 tty->driver->name, info->count);
892 }
893
894 /* Called by tty_hangup() when a hangup is signaled.
895 * This is the same as closing all open descriptors for the port.
896 */
897 static void hangup(struct tty_struct *tty)
898 {
899 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
900
901 if (debug_level >= DEBUG_LEVEL_INFO)
902 printk("%s(%d):%s hangup()\n",
903 __FILE__,__LINE__, info->device_name );
904
905 if (sanity_check(info, tty->name, "hangup"))
906 return;
907
908 flush_buffer(tty);
909 shutdown(info);
910
911 info->count = 0;
912 info->flags &= ~ASYNC_NORMAL_ACTIVE;
913 info->tty = NULL;
914
915 wake_up_interruptible(&info->open_wait);
916 }
917
918 /* Set new termios settings
919 */
920 static void set_termios(struct tty_struct *tty, struct termios *old_termios)
921 {
922 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
923 unsigned long flags;
924
925 if (debug_level >= DEBUG_LEVEL_INFO)
926 printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__,
927 tty->driver->name );
928
929 /* just return if nothing has changed */
930 if ((tty->termios->c_cflag == old_termios->c_cflag)
931 && (RELEVANT_IFLAG(tty->termios->c_iflag)
932 == RELEVANT_IFLAG(old_termios->c_iflag)))
933 return;
934
935 change_params(info);
936
937 /* Handle transition to B0 status */
938 if (old_termios->c_cflag & CBAUD &&
939 !(tty->termios->c_cflag & CBAUD)) {
940 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
941 spin_lock_irqsave(&info->lock,flags);
942 set_signals(info);
943 spin_unlock_irqrestore(&info->lock,flags);
944 }
945
946 /* Handle transition away from B0 status */
947 if (!(old_termios->c_cflag & CBAUD) &&
948 tty->termios->c_cflag & CBAUD) {
949 info->serial_signals |= SerialSignal_DTR;
950 if (!(tty->termios->c_cflag & CRTSCTS) ||
951 !test_bit(TTY_THROTTLED, &tty->flags)) {
952 info->serial_signals |= SerialSignal_RTS;
953 }
954 spin_lock_irqsave(&info->lock,flags);
955 set_signals(info);
956 spin_unlock_irqrestore(&info->lock,flags);
957 }
958
959 /* Handle turning off CRTSCTS */
960 if (old_termios->c_cflag & CRTSCTS &&
961 !(tty->termios->c_cflag & CRTSCTS)) {
962 tty->hw_stopped = 0;
963 tx_release(tty);
964 }
965 }
966
967 /* Send a block of data
968 *
969 * Arguments:
970 *
971 * tty pointer to tty information structure
972 * buf pointer to buffer containing send data
973 * count size of send data in bytes
974 *
975 * Return Value: number of characters written
976 */
977 static int write(struct tty_struct *tty,
978 const unsigned char *buf, int count)
979 {
980 int c, ret = 0;
981 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
982 unsigned long flags;
983
984 if (debug_level >= DEBUG_LEVEL_INFO)
985 printk("%s(%d):%s write() count=%d\n",
986 __FILE__,__LINE__,info->device_name,count);
987
988 if (sanity_check(info, tty->name, "write"))
989 goto cleanup;
990
991 if (!tty || !info->tx_buf)
992 goto cleanup;
993
994 if (info->params.mode == MGSL_MODE_HDLC) {
995 if (count > info->max_frame_size) {
996 ret = -EIO;
997 goto cleanup;
998 }
999 if (info->tx_active)
1000 goto cleanup;
1001 if (info->tx_count) {
1002 /* send accumulated data from send_char() calls */
1003 /* as frame and wait before accepting more data. */
1004 tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
1005 goto start;
1006 }
1007 ret = info->tx_count = count;
1008 tx_load_dma_buffer(info, buf, count);
1009 goto start;
1010 }
1011
1012 for (;;) {
1013 c = min_t(int, count,
1014 min(info->max_frame_size - info->tx_count - 1,
1015 info->max_frame_size - info->tx_put));
1016 if (c <= 0)
1017 break;
1018
1019 memcpy(info->tx_buf + info->tx_put, buf, c);
1020
1021 spin_lock_irqsave(&info->lock,flags);
1022 info->tx_put += c;
1023 if (info->tx_put >= info->max_frame_size)
1024 info->tx_put -= info->max_frame_size;
1025 info->tx_count += c;
1026 spin_unlock_irqrestore(&info->lock,flags);
1027
1028 buf += c;
1029 count -= c;
1030 ret += c;
1031 }
1032
1033 if (info->params.mode == MGSL_MODE_HDLC) {
1034 if (count) {
1035 ret = info->tx_count = 0;
1036 goto cleanup;
1037 }
1038 tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
1039 }
1040 start:
1041 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
1042 spin_lock_irqsave(&info->lock,flags);
1043 if (!info->tx_active)
1044 tx_start(info);
1045 spin_unlock_irqrestore(&info->lock,flags);
1046 }
1047
1048 cleanup:
1049 if (debug_level >= DEBUG_LEVEL_INFO)
1050 printk( "%s(%d):%s write() returning=%d\n",
1051 __FILE__,__LINE__,info->device_name,ret);
1052 return ret;
1053 }
1054
1055 /* Add a character to the transmit buffer.
1056 */
1057 static void put_char(struct tty_struct *tty, unsigned char ch)
1058 {
1059 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1060 unsigned long flags;
1061
1062 if ( debug_level >= DEBUG_LEVEL_INFO ) {
1063 printk( "%s(%d):%s put_char(%d)\n",
1064 __FILE__,__LINE__,info->device_name,ch);
1065 }
1066
1067 if (sanity_check(info, tty->name, "put_char"))
1068 return;
1069
1070 if (!tty || !info->tx_buf)
1071 return;
1072
1073 spin_lock_irqsave(&info->lock,flags);
1074
1075 if ( (info->params.mode != MGSL_MODE_HDLC) ||
1076 !info->tx_active ) {
1077
1078 if (info->tx_count < info->max_frame_size - 1) {
1079 info->tx_buf[info->tx_put++] = ch;
1080 if (info->tx_put >= info->max_frame_size)
1081 info->tx_put -= info->max_frame_size;
1082 info->tx_count++;
1083 }
1084 }
1085
1086 spin_unlock_irqrestore(&info->lock,flags);
1087 }
1088
1089 /* Send a high-priority XON/XOFF character
1090 */
1091 static void send_xchar(struct tty_struct *tty, char ch)
1092 {
1093 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1094 unsigned long flags;
1095
1096 if (debug_level >= DEBUG_LEVEL_INFO)
1097 printk("%s(%d):%s send_xchar(%d)\n",
1098 __FILE__,__LINE__, info->device_name, ch );
1099
1100 if (sanity_check(info, tty->name, "send_xchar"))
1101 return;
1102
1103 info->x_char = ch;
1104 if (ch) {
1105 /* Make sure transmit interrupts are on */
1106 spin_lock_irqsave(&info->lock,flags);
1107 if (!info->tx_enabled)
1108 tx_start(info);
1109 spin_unlock_irqrestore(&info->lock,flags);
1110 }
1111 }
1112
1113 /* Wait until the transmitter is empty.
1114 */
1115 static void wait_until_sent(struct tty_struct *tty, int timeout)
1116 {
1117 SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
1118 unsigned long orig_jiffies, char_time;
1119
1120 if (!info )
1121 return;
1122
1123 if (debug_level >= DEBUG_LEVEL_INFO)
1124 printk("%s(%d):%s wait_until_sent() entry\n",
1125 __FILE__,__LINE__, info->device_name );
1126
1127 if (sanity_check(info, tty->name, "wait_until_sent"))
1128 return;
1129
1130 if (!(info->flags & ASYNC_INITIALIZED))
1131 goto exit;
1132
1133 orig_jiffies = jiffies;
1134
1135 /* Set check interval to 1/5 of estimated time to
1136 * send a character, and make it at least 1. The check
1137 * interval should also be less than the timeout.
1138 * Note: use tight timings here to satisfy the NIST-PCTS.
1139 */
1140
1141 if ( info->params.data_rate ) {
1142 char_time = info->timeout/(32 * 5);
1143 if (!char_time)
1144 char_time++;
1145 } else
1146 char_time = 1;
1147
1148 if (timeout)
1149 char_time = min_t(unsigned long, char_time, timeout);
1150
1151 if ( info->params.mode == MGSL_MODE_HDLC ) {
1152 while (info->tx_active) {
1153 msleep_interruptible(jiffies_to_msecs(char_time));
1154 if (signal_pending(current))
1155 break;
1156 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1157 break;
1158 }
1159 } else {
1160 //TODO: determine if there is something similar to USC16C32
1161 // TXSTATUS_ALL_SENT status
1162 while ( info->tx_active && info->tx_enabled) {
1163 msleep_interruptible(jiffies_to_msecs(char_time));
1164 if (signal_pending(current))
1165 break;
1166 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1167 break;
1168 }
1169 }
1170
1171 exit:
1172 if (debug_level >= DEBUG_LEVEL_INFO)
1173 printk("%s(%d):%s wait_until_sent() exit\n",
1174 __FILE__,__LINE__, info->device_name );
1175 }
1176
1177 /* Return the count of free bytes in transmit buffer
1178 */
1179 static int write_room(struct tty_struct *tty)
1180 {
1181 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1182 int ret;
1183
1184 if (sanity_check(info, tty->name, "write_room"))
1185 return 0;
1186
1187 if (info->params.mode == MGSL_MODE_HDLC) {
1188 ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
1189 } else {
1190 ret = info->max_frame_size - info->tx_count - 1;
1191 if (ret < 0)
1192 ret = 0;
1193 }
1194
1195 if (debug_level >= DEBUG_LEVEL_INFO)
1196 printk("%s(%d):%s write_room()=%d\n",
1197 __FILE__, __LINE__, info->device_name, ret);
1198
1199 return ret;
1200 }
1201
1202 /* enable transmitter and send remaining buffered characters
1203 */
1204 static void flush_chars(struct tty_struct *tty)
1205 {
1206 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1207 unsigned long flags;
1208
1209 if ( debug_level >= DEBUG_LEVEL_INFO )
1210 printk( "%s(%d):%s flush_chars() entry tx_count=%d\n",
1211 __FILE__,__LINE__,info->device_name,info->tx_count);
1212
1213 if (sanity_check(info, tty->name, "flush_chars"))
1214 return;
1215
1216 if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped ||
1217 !info->tx_buf)
1218 return;
1219
1220 if ( debug_level >= DEBUG_LEVEL_INFO )
1221 printk( "%s(%d):%s flush_chars() entry, starting transmitter\n",
1222 __FILE__,__LINE__,info->device_name );
1223
1224 spin_lock_irqsave(&info->lock,flags);
1225
1226 if (!info->tx_active) {
1227 if ( (info->params.mode == MGSL_MODE_HDLC) &&
1228 info->tx_count ) {
1229 /* operating in synchronous (frame oriented) mode */
1230 /* copy data from circular tx_buf to */
1231 /* transmit DMA buffer. */
1232 tx_load_dma_buffer(info,
1233 info->tx_buf,info->tx_count);
1234 }
1235 tx_start(info);
1236 }
1237
1238 spin_unlock_irqrestore(&info->lock,flags);
1239 }
1240
1241 /* Discard all data in the send buffer
1242 */
1243 static void flush_buffer(struct tty_struct *tty)
1244 {
1245 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1246 unsigned long flags;
1247
1248 if (debug_level >= DEBUG_LEVEL_INFO)
1249 printk("%s(%d):%s flush_buffer() entry\n",
1250 __FILE__,__LINE__, info->device_name );
1251
1252 if (sanity_check(info, tty->name, "flush_buffer"))
1253 return;
1254
1255 spin_lock_irqsave(&info->lock,flags);
1256 info->tx_count = info->tx_put = info->tx_get = 0;
1257 del_timer(&info->tx_timer);
1258 spin_unlock_irqrestore(&info->lock,flags);
1259
1260 wake_up_interruptible(&tty->write_wait);
1261 tty_wakeup(tty);
1262 }
1263
1264 /* throttle (stop) transmitter
1265 */
1266 static void tx_hold(struct tty_struct *tty)
1267 {
1268 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1269 unsigned long flags;
1270
1271 if (sanity_check(info, tty->name, "tx_hold"))
1272 return;
1273
1274 if ( debug_level >= DEBUG_LEVEL_INFO )
1275 printk("%s(%d):%s tx_hold()\n",
1276 __FILE__,__LINE__,info->device_name);
1277
1278 spin_lock_irqsave(&info->lock,flags);
1279 if (info->tx_enabled)
1280 tx_stop(info);
1281 spin_unlock_irqrestore(&info->lock,flags);
1282 }
1283
1284 /* release (start) transmitter
1285 */
1286 static void tx_release(struct tty_struct *tty)
1287 {
1288 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1289 unsigned long flags;
1290
1291 if (sanity_check(info, tty->name, "tx_release"))
1292 return;
1293
1294 if ( debug_level >= DEBUG_LEVEL_INFO )
1295 printk("%s(%d):%s tx_release()\n",
1296 __FILE__,__LINE__,info->device_name);
1297
1298 spin_lock_irqsave(&info->lock,flags);
1299 if (!info->tx_enabled)
1300 tx_start(info);
1301 spin_unlock_irqrestore(&info->lock,flags);
1302 }
1303
1304 /* Service an IOCTL request
1305 *
1306 * Arguments:
1307 *
1308 * tty pointer to tty instance data
1309 * file pointer to associated file object for device
1310 * cmd IOCTL command code
1311 * arg command argument/context
1312 *
1313 * Return Value: 0 if success, otherwise error code
1314 */
1315 static int ioctl(struct tty_struct *tty, struct file *file,
1316 unsigned int cmd, unsigned long arg)
1317 {
1318 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1319 int error;
1320 struct mgsl_icount cnow; /* kernel counter temps */
1321 struct serial_icounter_struct __user *p_cuser; /* user space */
1322 unsigned long flags;
1323 void __user *argp = (void __user *)arg;
1324
1325 if (debug_level >= DEBUG_LEVEL_INFO)
1326 printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__,
1327 info->device_name, cmd );
1328
1329 if (sanity_check(info, tty->name, "ioctl"))
1330 return -ENODEV;
1331
1332 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1333 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1334 if (tty->flags & (1 << TTY_IO_ERROR))
1335 return -EIO;
1336 }
1337
1338 switch (cmd) {
1339 case MGSL_IOCGPARAMS:
1340 return get_params(info, argp);
1341 case MGSL_IOCSPARAMS:
1342 return set_params(info, argp);
1343 case MGSL_IOCGTXIDLE:
1344 return get_txidle(info, argp);
1345 case MGSL_IOCSTXIDLE:
1346 return set_txidle(info, (int)arg);
1347 case MGSL_IOCTXENABLE:
1348 return tx_enable(info, (int)arg);
1349 case MGSL_IOCRXENABLE:
1350 return rx_enable(info, (int)arg);
1351 case MGSL_IOCTXABORT:
1352 return tx_abort(info);
1353 case MGSL_IOCGSTATS:
1354 return get_stats(info, argp);
1355 case MGSL_IOCWAITEVENT:
1356 return wait_mgsl_event(info, argp);
1357 case MGSL_IOCLOOPTXDONE:
1358 return 0; // TODO: Not supported, need to document
1359 /* Wait for modem input (DCD,RI,DSR,CTS) change
1360 * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
1361 */
1362 case TIOCMIWAIT:
1363 return modem_input_wait(info,(int)arg);
1364
1365 /*
1366 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1367 * Return: write counters to the user passed counter struct
1368 * NB: both 1->0 and 0->1 transitions are counted except for
1369 * RI where only 0->1 is counted.
1370 */
1371 case TIOCGICOUNT:
1372 spin_lock_irqsave(&info->lock,flags);
1373 cnow = info->icount;
1374 spin_unlock_irqrestore(&info->lock,flags);
1375 p_cuser = argp;
1376 PUT_USER(error,cnow.cts, &p_cuser->cts);
1377 if (error) return error;
1378 PUT_USER(error,cnow.dsr, &p_cuser->dsr);
1379 if (error) return error;
1380 PUT_USER(error,cnow.rng, &p_cuser->rng);
1381 if (error) return error;
1382 PUT_USER(error,cnow.dcd, &p_cuser->dcd);
1383 if (error) return error;
1384 PUT_USER(error,cnow.rx, &p_cuser->rx);
1385 if (error) return error;
1386 PUT_USER(error,cnow.tx, &p_cuser->tx);
1387 if (error) return error;
1388 PUT_USER(error,cnow.frame, &p_cuser->frame);
1389 if (error) return error;
1390 PUT_USER(error,cnow.overrun, &p_cuser->overrun);
1391 if (error) return error;
1392 PUT_USER(error,cnow.parity, &p_cuser->parity);
1393 if (error) return error;
1394 PUT_USER(error,cnow.brk, &p_cuser->brk);
1395 if (error) return error;
1396 PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
1397 if (error) return error;
1398 return 0;
1399 default:
1400 return -ENOIOCTLCMD;
1401 }
1402 return 0;
1403 }
1404
1405 /*
1406 * /proc fs routines....
1407 */
1408
1409 static inline int line_info(char *buf, SLMP_INFO *info)
1410 {
1411 char stat_buf[30];
1412 int ret;
1413 unsigned long flags;
1414
1415 ret = sprintf(buf, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n"
1416 "\tIRQ=%d MaxFrameSize=%u\n",
1417 info->device_name,
1418 info->phys_sca_base,
1419 info->phys_memory_base,
1420 info->phys_statctrl_base,
1421 info->phys_lcr_base,
1422 info->irq_level,
1423 info->max_frame_size );
1424
1425 /* output current serial signal states */
1426 spin_lock_irqsave(&info->lock,flags);
1427 get_signals(info);
1428 spin_unlock_irqrestore(&info->lock,flags);
1429
1430 stat_buf[0] = 0;
1431 stat_buf[1] = 0;
1432 if (info->serial_signals & SerialSignal_RTS)
1433 strcat(stat_buf, "|RTS");
1434 if (info->serial_signals & SerialSignal_CTS)
1435 strcat(stat_buf, "|CTS");
1436 if (info->serial_signals & SerialSignal_DTR)
1437 strcat(stat_buf, "|DTR");
1438 if (info->serial_signals & SerialSignal_DSR)
1439 strcat(stat_buf, "|DSR");
1440 if (info->serial_signals & SerialSignal_DCD)
1441 strcat(stat_buf, "|CD");
1442 if (info->serial_signals & SerialSignal_RI)
1443 strcat(stat_buf, "|RI");
1444
1445 if (info->params.mode == MGSL_MODE_HDLC) {
1446 ret += sprintf(buf+ret, "\tHDLC txok:%d rxok:%d",
1447 info->icount.txok, info->icount.rxok);
1448 if (info->icount.txunder)
1449 ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
1450 if (info->icount.txabort)
1451 ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
1452 if (info->icount.rxshort)
1453 ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
1454 if (info->icount.rxlong)
1455 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
1456 if (info->icount.rxover)
1457 ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
1458 if (info->icount.rxcrc)
1459 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxcrc);
1460 } else {
1461 ret += sprintf(buf+ret, "\tASYNC tx:%d rx:%d",
1462 info->icount.tx, info->icount.rx);
1463 if (info->icount.frame)
1464 ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
1465 if (info->icount.parity)
1466 ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
1467 if (info->icount.brk)
1468 ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
1469 if (info->icount.overrun)
1470 ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
1471 }
1472
1473 /* Append serial signal status to end */
1474 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
1475
1476 ret += sprintf(buf+ret, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
1477 info->tx_active,info->bh_requested,info->bh_running,
1478 info->pending_bh);
1479
1480 return ret;
1481 }
1482
1483 /* Called to print information about devices
1484 */
1485 int read_proc(char *page, char **start, off_t off, int count,
1486 int *eof, void *data)
1487 {
1488 int len = 0, l;
1489 off_t begin = 0;
1490 SLMP_INFO *info;
1491
1492 len += sprintf(page, "synclinkmp driver:%s\n", driver_version);
1493
1494 info = synclinkmp_device_list;
1495 while( info ) {
1496 l = line_info(page + len, info);
1497 len += l;
1498 if (len+begin > off+count)
1499 goto done;
1500 if (len+begin < off) {
1501 begin += len;
1502 len = 0;
1503 }
1504 info = info->next_device;
1505 }
1506
1507 *eof = 1;
1508 done:
1509 if (off >= len+begin)
1510 return 0;
1511 *start = page + (off-begin);
1512 return ((count < begin+len-off) ? count : begin+len-off);
1513 }
1514
1515 /* Return the count of bytes in transmit buffer
1516 */
1517 static int chars_in_buffer(struct tty_struct *tty)
1518 {
1519 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1520
1521 if (sanity_check(info, tty->name, "chars_in_buffer"))
1522 return 0;
1523
1524 if (debug_level >= DEBUG_LEVEL_INFO)
1525 printk("%s(%d):%s chars_in_buffer()=%d\n",
1526 __FILE__, __LINE__, info->device_name, info->tx_count);
1527
1528 return info->tx_count;
1529 }
1530
1531 /* Signal remote device to throttle send data (our receive data)
1532 */
1533 static void throttle(struct tty_struct * tty)
1534 {
1535 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1536 unsigned long flags;
1537
1538 if (debug_level >= DEBUG_LEVEL_INFO)
1539 printk("%s(%d):%s throttle() entry\n",
1540 __FILE__,__LINE__, info->device_name );
1541
1542 if (sanity_check(info, tty->name, "throttle"))
1543 return;
1544
1545 if (I_IXOFF(tty))
1546 send_xchar(tty, STOP_CHAR(tty));
1547
1548 if (tty->termios->c_cflag & CRTSCTS) {
1549 spin_lock_irqsave(&info->lock,flags);
1550 info->serial_signals &= ~SerialSignal_RTS;
1551 set_signals(info);
1552 spin_unlock_irqrestore(&info->lock,flags);
1553 }
1554 }
1555
1556 /* Signal remote device to stop throttling send data (our receive data)
1557 */
1558 static void unthrottle(struct tty_struct * tty)
1559 {
1560 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
1561 unsigned long flags;
1562
1563 if (debug_level >= DEBUG_LEVEL_INFO)
1564 printk("%s(%d):%s unthrottle() entry\n",
1565 __FILE__,__LINE__, info->device_name );
1566
1567 if (sanity_check(info, tty->name, "unthrottle"))
1568 return;
1569
1570 if (I_IXOFF(tty)) {
1571 if (info->x_char)
1572 info->x_char = 0;
1573 else
1574 send_xchar(tty, START_CHAR(tty));
1575 }
1576
1577 if (tty->termios->c_cflag & CRTSCTS) {
1578 spin_lock_irqsave(&info->lock,flags);
1579 info->serial_signals |= SerialSignal_RTS;
1580 set_signals(info);
1581 spin_unlock_irqrestore(&info->lock,flags);
1582 }
1583 }
1584
1585 /* set or clear transmit break condition
1586 * break_state -1=set break condition, 0=clear
1587 */
1588 static void set_break(struct tty_struct *tty, int break_state)
1589 {
1590 unsigned char RegValue;
1591 SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
1592 unsigned long flags;
1593
1594 if (debug_level >= DEBUG_LEVEL_INFO)
1595 printk("%s(%d):%s set_break(%d)\n",
1596 __FILE__,__LINE__, info->device_name, break_state);
1597
1598 if (sanity_check(info, tty->name, "set_break"))
1599 return;
1600
1601 spin_lock_irqsave(&info->lock,flags);
1602 RegValue = read_reg(info, CTL);
1603 if (break_state == -1)
1604 RegValue |= BIT3;
1605 else
1606 RegValue &= ~BIT3;
1607 write_reg(info, CTL, RegValue);
1608 spin_unlock_irqrestore(&info->lock,flags);
1609 }
1610
1611 #ifdef CONFIG_HDLC
1612
1613 /**
1614 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
1615 * set encoding and frame check sequence (FCS) options
1616 *
1617 * dev pointer to network device structure
1618 * encoding serial encoding setting
1619 * parity FCS setting
1620 *
1621 * returns 0 if success, otherwise error code
1622 */
1623 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
1624 unsigned short parity)
1625 {
1626 SLMP_INFO *info = dev_to_port(dev);
1627 unsigned char new_encoding;
1628 unsigned short new_crctype;
1629
1630 /* return error if TTY interface open */
1631 if (info->count)
1632 return -EBUSY;
1633
1634 switch (encoding)
1635 {
1636 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
1637 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
1638 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
1639 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
1640 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
1641 default: return -EINVAL;
1642 }
1643
1644 switch (parity)
1645 {
1646 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
1647 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
1648 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
1649 default: return -EINVAL;
1650 }
1651
1652 info->params.encoding = new_encoding;
1653 info->params.crc_type = new_crctype;;
1654
1655 /* if network interface up, reprogram hardware */
1656 if (info->netcount)
1657 program_hw(info);
1658
1659 return 0;
1660 }
1661
1662 /**
1663 * called by generic HDLC layer to send frame
1664 *
1665 * skb socket buffer containing HDLC frame
1666 * dev pointer to network device structure
1667 *
1668 * returns 0 if success, otherwise error code
1669 */
1670 static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
1671 {
1672 SLMP_INFO *info = dev_to_port(dev);
1673 struct net_device_stats *stats = hdlc_stats(dev);
1674 unsigned long flags;
1675
1676 if (debug_level >= DEBUG_LEVEL_INFO)
1677 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
1678
1679 /* stop sending until this frame completes */
1680 netif_stop_queue(dev);
1681
1682 /* copy data to device buffers */
1683 info->tx_count = skb->len;
1684 tx_load_dma_buffer(info, skb->data, skb->len);
1685
1686 /* update network statistics */
1687 stats->tx_packets++;
1688 stats->tx_bytes += skb->len;
1689
1690 /* done with socket buffer, so free it */
1691 dev_kfree_skb(skb);
1692
1693 /* save start time for transmit timeout detection */
1694 dev->trans_start = jiffies;
1695
1696 /* start hardware transmitter if necessary */
1697 spin_lock_irqsave(&info->lock,flags);
1698 if (!info->tx_active)
1699 tx_start(info);
1700 spin_unlock_irqrestore(&info->lock,flags);
1701
1702 return 0;
1703 }
1704
1705 /**
1706 * called by network layer when interface enabled
1707 * claim resources and initialize hardware
1708 *
1709 * dev pointer to network device structure
1710 *
1711 * returns 0 if success, otherwise error code
1712 */
1713 static int hdlcdev_open(struct net_device *dev)
1714 {
1715 SLMP_INFO *info = dev_to_port(dev);
1716 int rc;
1717 unsigned long flags;
1718
1719 if (debug_level >= DEBUG_LEVEL_INFO)
1720 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
1721
1722 /* generic HDLC layer open processing */
1723 if ((rc = hdlc_open(dev)))
1724 return rc;
1725
1726 /* arbitrate between network and tty opens */
1727 spin_lock_irqsave(&info->netlock, flags);
1728 if (info->count != 0 || info->netcount != 0) {
1729 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
1730 spin_unlock_irqrestore(&info->netlock, flags);
1731 return -EBUSY;
1732 }
1733 info->netcount=1;
1734 spin_unlock_irqrestore(&info->netlock, flags);
1735
1736 /* claim resources and init adapter */
1737 if ((rc = startup(info)) != 0) {
1738 spin_lock_irqsave(&info->netlock, flags);
1739 info->netcount=0;
1740 spin_unlock_irqrestore(&info->netlock, flags);
1741 return rc;
1742 }
1743
1744 /* assert DTR and RTS, apply hardware settings */
1745 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
1746 program_hw(info);
1747
1748 /* enable network layer transmit */
1749 dev->trans_start = jiffies;
1750 netif_start_queue(dev);
1751
1752 /* inform generic HDLC layer of current DCD status */
1753 spin_lock_irqsave(&info->lock, flags);
1754 get_signals(info);
1755 spin_unlock_irqrestore(&info->lock, flags);
1756 hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, dev);
1757
1758 return 0;
1759 }
1760
1761 /**
1762 * called by network layer when interface is disabled
1763 * shutdown hardware and release resources
1764 *
1765 * dev pointer to network device structure
1766 *
1767 * returns 0 if success, otherwise error code
1768 */
1769 static int hdlcdev_close(struct net_device *dev)
1770 {
1771 SLMP_INFO *info = dev_to_port(dev);
1772 unsigned long flags;
1773
1774 if (debug_level >= DEBUG_LEVEL_INFO)
1775 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
1776
1777 netif_stop_queue(dev);
1778
1779 /* shutdown adapter and release resources */
1780 shutdown(info);
1781
1782 hdlc_close(dev);
1783
1784 spin_lock_irqsave(&info->netlock, flags);
1785 info->netcount=0;
1786 spin_unlock_irqrestore(&info->netlock, flags);
1787
1788 return 0;
1789 }
1790
1791 /**
1792 * called by network layer to process IOCTL call to network device
1793 *
1794 * dev pointer to network device structure
1795 * ifr pointer to network interface request structure
1796 * cmd IOCTL command code
1797 *
1798 * returns 0 if success, otherwise error code
1799 */
1800 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1801 {
1802 const size_t size = sizeof(sync_serial_settings);
1803 sync_serial_settings new_line;
1804 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
1805 SLMP_INFO *info = dev_to_port(dev);
1806 unsigned int flags;
1807
1808 if (debug_level >= DEBUG_LEVEL_INFO)
1809 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
1810
1811 /* return error if TTY interface open */
1812 if (info->count)
1813 return -EBUSY;
1814
1815 if (cmd != SIOCWANDEV)
1816 return hdlc_ioctl(dev, ifr, cmd);
1817
1818 switch(ifr->ifr_settings.type) {
1819 case IF_GET_IFACE: /* return current sync_serial_settings */
1820
1821 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
1822 if (ifr->ifr_settings.size < size) {
1823 ifr->ifr_settings.size = size; /* data size wanted */
1824 return -ENOBUFS;
1825 }
1826
1827 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1828 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1829 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1830 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
1831
1832 switch (flags){
1833 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
1834 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
1835 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
1836 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
1837 default: new_line.clock_type = CLOCK_DEFAULT;
1838 }
1839
1840 new_line.clock_rate = info->params.clock_speed;
1841 new_line.loopback = info->params.loopback ? 1:0;
1842
1843 if (copy_to_user(line, &new_line, size))
1844 return -EFAULT;
1845 return 0;
1846
1847 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
1848
1849 if(!capable(CAP_NET_ADMIN))
1850 return -EPERM;
1851 if (copy_from_user(&new_line, line, size))
1852 return -EFAULT;
1853
1854 switch (new_line.clock_type)
1855 {
1856 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
1857 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
1858 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
1859 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
1860 case CLOCK_DEFAULT: flags = info->params.flags &
1861 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1862 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1863 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1864 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
1865 default: return -EINVAL;
1866 }
1867
1868 if (new_line.loopback != 0 && new_line.loopback != 1)
1869 return -EINVAL;
1870
1871 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1872 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1873 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1874 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
1875 info->params.flags |= flags;
1876
1877 info->params.loopback = new_line.loopback;
1878
1879 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
1880 info->params.clock_speed = new_line.clock_rate;
1881 else
1882 info->params.clock_speed = 0;
1883
1884 /* if network interface up, reprogram hardware */
1885 if (info->netcount)
1886 program_hw(info);
1887 return 0;
1888
1889 default:
1890 return hdlc_ioctl(dev, ifr, cmd);
1891 }
1892 }
1893
1894 /**
1895 * called by network layer when transmit timeout is detected
1896 *
1897 * dev pointer to network device structure
1898 */
1899 static void hdlcdev_tx_timeout(struct net_device *dev)
1900 {
1901 SLMP_INFO *info = dev_to_port(dev);
1902 struct net_device_stats *stats = hdlc_stats(dev);
1903 unsigned long flags;
1904
1905 if (debug_level >= DEBUG_LEVEL_INFO)
1906 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
1907
1908 stats->tx_errors++;
1909 stats->tx_aborted_errors++;
1910
1911 spin_lock_irqsave(&info->lock,flags);
1912 tx_stop(info);
1913 spin_unlock_irqrestore(&info->lock,flags);
1914
1915 netif_wake_queue(dev);
1916 }
1917
1918 /**
1919 * called by device driver when transmit completes
1920 * reenable network layer transmit if stopped
1921 *
1922 * info pointer to device instance information
1923 */
1924 static void hdlcdev_tx_done(SLMP_INFO *info)
1925 {
1926 if (netif_queue_stopped(info->netdev))
1927 netif_wake_queue(info->netdev);
1928 }
1929
1930 /**
1931 * called by device driver when frame received
1932 * pass frame to network layer
1933 *
1934 * info pointer to device instance information
1935 * buf pointer to buffer contianing frame data
1936 * size count of data bytes in buf
1937 */
1938 static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size)
1939 {
1940 struct sk_buff *skb = dev_alloc_skb(size);
1941 struct net_device *dev = info->netdev;
1942 struct net_device_stats *stats = hdlc_stats(dev);
1943
1944 if (debug_level >= DEBUG_LEVEL_INFO)
1945 printk("hdlcdev_rx(%s)\n",dev->name);
1946
1947 if (skb == NULL) {
1948 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
1949 stats->rx_dropped++;
1950 return;
1951 }
1952
1953 memcpy(skb_put(skb, size),buf,size);
1954
1955 skb->protocol = hdlc_type_trans(skb, info->netdev);
1956
1957 stats->rx_packets++;
1958 stats->rx_bytes += size;
1959
1960 netif_rx(skb);
1961
1962 info->netdev->last_rx = jiffies;
1963 }
1964
1965 /**
1966 * called by device driver when adding device instance
1967 * do generic HDLC initialization
1968 *
1969 * info pointer to device instance information
1970 *
1971 * returns 0 if success, otherwise error code
1972 */
1973 static int hdlcdev_init(SLMP_INFO *info)
1974 {
1975 int rc;
1976 struct net_device *dev;
1977 hdlc_device *hdlc;
1978
1979 /* allocate and initialize network and HDLC layer objects */
1980
1981 if (!(dev = alloc_hdlcdev(info))) {
1982 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
1983 return -ENOMEM;
1984 }
1985
1986 /* for network layer reporting purposes only */
1987 dev->mem_start = info->phys_sca_base;
1988 dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1;
1989 dev->irq = info->irq_level;
1990
1991 /* network layer callbacks and settings */
1992 dev->do_ioctl = hdlcdev_ioctl;
1993 dev->open = hdlcdev_open;
1994 dev->stop = hdlcdev_close;
1995 dev->tx_timeout = hdlcdev_tx_timeout;
1996 dev->watchdog_timeo = 10*HZ;
1997 dev->tx_queue_len = 50;
1998
1999 /* generic HDLC layer callbacks and settings */
2000 hdlc = dev_to_hdlc(dev);
2001 hdlc->attach = hdlcdev_attach;
2002 hdlc->xmit = hdlcdev_xmit;
2003
2004 /* register objects with HDLC layer */
2005 if ((rc = register_hdlc_device(dev))) {
2006 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
2007 free_netdev(dev);
2008 return rc;
2009 }
2010
2011 info->netdev = dev;
2012 return 0;
2013 }
2014
2015 /**
2016 * called by device driver when removing device instance
2017 * do generic HDLC cleanup
2018 *
2019 * info pointer to device instance information
2020 */
2021 static void hdlcdev_exit(SLMP_INFO *info)
2022 {
2023 unregister_hdlc_device(info->netdev);
2024 free_netdev(info->netdev);
2025 info->netdev = NULL;
2026 }
2027
2028 #endif /* CONFIG_HDLC */
2029
2030
2031 /* Return next bottom half action to perform.
2032 * Return Value: BH action code or 0 if nothing to do.
2033 */
2034 int bh_action(SLMP_INFO *info)
2035 {
2036 unsigned long flags;
2037 int rc = 0;
2038
2039 spin_lock_irqsave(&info->lock,flags);
2040
2041 if (info->pending_bh & BH_RECEIVE) {
2042 info->pending_bh &= ~BH_RECEIVE;
2043 rc = BH_RECEIVE;
2044 } else if (info->pending_bh & BH_TRANSMIT) {
2045 info->pending_bh &= ~BH_TRANSMIT;
2046 rc = BH_TRANSMIT;
2047 } else if (info->pending_bh & BH_STATUS) {
2048 info->pending_bh &= ~BH_STATUS;
2049 rc = BH_STATUS;
2050 }
2051
2052 if (!rc) {
2053 /* Mark BH routine as complete */
2054 info->bh_running = 0;
2055 info->bh_requested = 0;
2056 }
2057
2058 spin_unlock_irqrestore(&info->lock,flags);
2059
2060 return rc;
2061 }
2062
2063 /* Perform bottom half processing of work items queued by ISR.
2064 */
2065 void bh_handler(void* Context)
2066 {
2067 SLMP_INFO *info = (SLMP_INFO*)Context;
2068 int action;
2069
2070 if (!info)
2071 return;
2072
2073 if ( debug_level >= DEBUG_LEVEL_BH )
2074 printk( "%s(%d):%s bh_handler() entry\n",
2075 __FILE__,__LINE__,info->device_name);
2076
2077 info->bh_running = 1;
2078
2079 while((action = bh_action(info)) != 0) {
2080
2081 /* Process work item */
2082 if ( debug_level >= DEBUG_LEVEL_BH )
2083 printk( "%s(%d):%s bh_handler() work item action=%d\n",
2084 __FILE__,__LINE__,info->device_name, action);
2085
2086 switch (action) {
2087
2088 case BH_RECEIVE:
2089 bh_receive(info);
2090 break;
2091 case BH_TRANSMIT:
2092 bh_transmit(info);
2093 break;
2094 case BH_STATUS:
2095 bh_status(info);
2096 break;
2097 default:
2098 /* unknown work item ID */
2099 printk("%s(%d):%s Unknown work item ID=%08X!\n",
2100 __FILE__,__LINE__,info->device_name,action);
2101 break;
2102 }
2103 }
2104
2105 if ( debug_level >= DEBUG_LEVEL_BH )
2106 printk( "%s(%d):%s bh_handler() exit\n",
2107 __FILE__,__LINE__,info->device_name);
2108 }
2109
2110 void bh_receive(SLMP_INFO *info)
2111 {
2112 if ( debug_level >= DEBUG_LEVEL_BH )
2113 printk( "%s(%d):%s bh_receive()\n",
2114 __FILE__,__LINE__,info->device_name);
2115
2116 while( rx_get_frame(info) );
2117 }
2118
2119 void bh_transmit(SLMP_INFO *info)
2120 {
2121 struct tty_struct *tty = info->tty;
2122
2123 if ( debug_level >= DEBUG_LEVEL_BH )
2124 printk( "%s(%d):%s bh_transmit() entry\n",
2125 __FILE__,__LINE__,info->device_name);
2126
2127 if (tty) {
2128 tty_wakeup(tty);
2129 wake_up_interruptible(&tty->write_wait);
2130 }
2131 }
2132
2133 void bh_status(SLMP_INFO *info)
2134 {
2135 if ( debug_level >= DEBUG_LEVEL_BH )
2136 printk( "%s(%d):%s bh_status() entry\n",
2137 __FILE__,__LINE__,info->device_name);
2138
2139 info->ri_chkcount = 0;
2140 info->dsr_chkcount = 0;
2141 info->dcd_chkcount = 0;
2142 info->cts_chkcount = 0;
2143 }
2144
2145 void isr_timer(SLMP_INFO * info)
2146 {
2147 unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
2148
2149 /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */
2150 write_reg(info, IER2, 0);
2151
2152 /* TMCS, Timer Control/Status Register
2153 *
2154 * 07 CMF, Compare match flag (read only) 1=match
2155 * 06 ECMI, CMF Interrupt Enable: 0=disabled
2156 * 05 Reserved, must be 0
2157 * 04 TME, Timer Enable
2158 * 03..00 Reserved, must be 0
2159 *
2160 * 0000 0000
2161 */
2162 write_reg(info, (unsigned char)(timer + TMCS), 0);
2163
2164 info->irq_occurred = TRUE;
2165
2166 if ( debug_level >= DEBUG_LEVEL_ISR )
2167 printk("%s(%d):%s isr_timer()\n",
2168 __FILE__,__LINE__,info->device_name);
2169 }
2170
2171 void isr_rxint(SLMP_INFO * info)
2172 {
2173 struct tty_struct *tty = info->tty;
2174 struct mgsl_icount *icount = &info->icount;
2175 unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD);
2176 unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN;
2177
2178 /* clear status bits */
2179 if (status)
2180 write_reg(info, SR1, status);
2181
2182 if (status2)
2183 write_reg(info, SR2, status2);
2184
2185 if ( debug_level >= DEBUG_LEVEL_ISR )
2186 printk("%s(%d):%s isr_rxint status=%02X %02x\n",
2187 __FILE__,__LINE__,info->device_name,status,status2);
2188
2189 if (info->params.mode == MGSL_MODE_ASYNC) {
2190 if (status & BRKD) {
2191 icount->brk++;
2192
2193 /* process break detection if tty control
2194 * is not set to ignore it
2195 */
2196 if ( tty ) {
2197 if (!(status & info->ignore_status_mask1)) {
2198 if (info->read_status_mask1 & BRKD) {
2199 *tty->flip.flag_buf_ptr = TTY_BREAK;
2200 if (info->flags & ASYNC_SAK)
2201 do_SAK(tty);
2202 }
2203 }
2204 }
2205 }
2206 }
2207 else {
2208 if (status & (FLGD|IDLD)) {
2209 if (status & FLGD)
2210 info->icount.exithunt++;
2211 else if (status & IDLD)
2212 info->icount.rxidle++;
2213 wake_up_interruptible(&info->event_wait_q);
2214 }
2215 }
2216
2217 if (status & CDCD) {
2218 /* simulate a common modem status change interrupt
2219 * for our handler
2220 */
2221 get_signals( info );
2222 isr_io_pin(info,
2223 MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD));
2224 }
2225 }
2226
2227 /*
2228 * handle async rx data interrupts
2229 */
2230 void isr_rxrdy(SLMP_INFO * info)
2231 {
2232 u16 status;
2233 unsigned char DataByte;
2234 struct tty_struct *tty = info->tty;
2235 struct mgsl_icount *icount = &info->icount;
2236
2237 if ( debug_level >= DEBUG_LEVEL_ISR )
2238 printk("%s(%d):%s isr_rxrdy\n",
2239 __FILE__,__LINE__,info->device_name);
2240
2241 while((status = read_reg(info,CST0)) & BIT0)
2242 {
2243 DataByte = read_reg(info,TRB);
2244
2245 if ( tty ) {
2246 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
2247 continue;
2248
2249 *tty->flip.char_buf_ptr = DataByte;
2250 *tty->flip.flag_buf_ptr = 0;
2251 }
2252
2253 icount->rx++;
2254
2255 if ( status & (PE + FRME + OVRN) ) {
2256 printk("%s(%d):%s rxerr=%04X\n",
2257 __FILE__,__LINE__,info->device_name,status);
2258
2259 /* update error statistics */
2260 if (status & PE)
2261 icount->parity++;
2262 else if (status & FRME)
2263 icount->frame++;
2264 else if (status & OVRN)
2265 icount->overrun++;
2266
2267 /* discard char if tty control flags say so */
2268 if (status & info->ignore_status_mask2)
2269 continue;
2270
2271 status &= info->read_status_mask2;
2272
2273 if ( tty ) {
2274 if (status & PE)
2275 *tty->flip.flag_buf_ptr = TTY_PARITY;
2276 else if (status & FRME)
2277 *tty->flip.flag_buf_ptr = TTY_FRAME;
2278 if (status & OVRN) {
2279 /* Overrun is special, since it's
2280 * reported immediately, and doesn't
2281 * affect the current character
2282 */
2283 if (tty->flip.count < TTY_FLIPBUF_SIZE) {
2284 tty->flip.count++;
2285 tty->flip.flag_buf_ptr++;
2286 tty->flip.char_buf_ptr++;
2287 *tty->flip.flag_buf_ptr = TTY_OVERRUN;
2288 }
2289 }
2290 }
2291 } /* end of if (error) */
2292
2293 if ( tty ) {
2294 tty->flip.flag_buf_ptr++;
2295 tty->flip.char_buf_ptr++;
2296 tty->flip.count++;
2297 }
2298 }
2299
2300 if ( debug_level >= DEBUG_LEVEL_ISR ) {
2301 printk("%s(%d):%s isr_rxrdy() flip count=%d\n",
2302 __FILE__,__LINE__,info->device_name,
2303 tty ? tty->flip.count : 0);
2304 printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
2305 __FILE__,__LINE__,info->device_name,
2306 icount->rx,icount->brk,icount->parity,
2307 icount->frame,icount->overrun);
2308 }
2309
2310 if ( tty && tty->flip.count )
2311 tty_flip_buffer_push(tty);
2312 }
2313
2314 static void isr_txeom(SLMP_INFO * info, unsigned char status)
2315 {
2316 if ( debug_level >= DEBUG_LEVEL_ISR )
2317 printk("%s(%d):%s isr_txeom status=%02x\n",
2318 __FILE__,__LINE__,info->device_name,status);
2319
2320 write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
2321 write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
2322 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
2323
2324 if (status & UDRN) {
2325 write_reg(info, CMD, TXRESET);
2326 write_reg(info, CMD, TXENABLE);
2327 } else
2328 write_reg(info, CMD, TXBUFCLR);
2329
2330 /* disable and clear tx interrupts */
2331 info->ie0_value &= ~TXRDYE;
2332 info->ie1_value &= ~(IDLE + UDRN);
2333 write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
2334 write_reg(info, SR1, (unsigned char)(UDRN + IDLE));
2335
2336 if ( info->tx_active ) {
2337 if (info->params.mode != MGSL_MODE_ASYNC) {
2338 if (status & UDRN)
2339 info->icount.txunder++;
2340 else if (status & IDLE)
2341 info->icount.txok++;
2342 }
2343
2344 info->tx_active = 0;
2345 info->tx_count = info->tx_put = info->tx_get = 0;
2346
2347 del_timer(&info->tx_timer);
2348
2349 if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) {
2350 info->serial_signals &= ~SerialSignal_RTS;
2351 info->drop_rts_on_tx_done = 0;
2352 set_signals(info);
2353 }
2354
2355 #ifdef CONFIG_HDLC
2356 if (info->netcount)
2357 hdlcdev_tx_done(info);
2358 else
2359 #endif
2360 {
2361 if (info->tty && (info->tty->stopped || info->tty->hw_stopped)) {
2362 tx_stop(info);
2363 return;
2364 }
2365 info->pending_bh |= BH_TRANSMIT;
2366 }
2367 }
2368 }
2369
2370
2371 /*
2372 * handle tx status interrupts
2373 */
2374 void isr_txint(SLMP_INFO * info)
2375 {
2376 unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS);
2377
2378 /* clear status bits */
2379 write_reg(info, SR1, status);
2380
2381 if ( debug_level >= DEBUG_LEVEL_ISR )
2382 printk("%s(%d):%s isr_txint status=%02x\n",
2383 __FILE__,__LINE__,info->device_name,status);
2384
2385 if (status & (UDRN + IDLE))
2386 isr_txeom(info, status);
2387
2388 if (status & CCTS) {
2389 /* simulate a common modem status change interrupt
2390 * for our handler
2391 */
2392 get_signals( info );
2393 isr_io_pin(info,
2394 MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS));
2395
2396 }
2397 }
2398
2399 /*
2400 * handle async tx data interrupts
2401 */
2402 void isr_txrdy(SLMP_INFO * info)
2403 {
2404 if ( debug_level >= DEBUG_LEVEL_ISR )
2405 printk("%s(%d):%s isr_txrdy() tx_count=%d\n",
2406 __FILE__,__LINE__,info->device_name,info->tx_count);
2407
2408 if (info->params.mode != MGSL_MODE_ASYNC) {
2409 /* disable TXRDY IRQ, enable IDLE IRQ */
2410 info->ie0_value &= ~TXRDYE;
2411 info->ie1_value |= IDLE;
2412 write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
2413 return;
2414 }
2415
2416 if (info->tty && (info->tty->stopped || info->tty->hw_stopped)) {
2417 tx_stop(info);
2418 return;
2419 }
2420
2421 if ( info->tx_count )
2422 tx_load_fifo( info );
2423 else {
2424 info->tx_active = 0;
2425 info->ie0_value &= ~TXRDYE;
2426 write_reg(info, IE0, info->ie0_value);
2427 }
2428
2429 if (info->tx_count < WAKEUP_CHARS)
2430 info->pending_bh |= BH_TRANSMIT;
2431 }
2432
2433 void isr_rxdmaok(SLMP_INFO * info)
2434 {
2435 /* BIT7 = EOT (end of transfer)
2436 * BIT6 = EOM (end of message/frame)
2437 */
2438 unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0;
2439
2440 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2441 write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
2442
2443 if ( debug_level >= DEBUG_LEVEL_ISR )
2444 printk("%s(%d):%s isr_rxdmaok(), status=%02x\n",
2445 __FILE__,__LINE__,info->device_name,status);
2446
2447 info->pending_bh |= BH_RECEIVE;
2448 }
2449
2450 void isr_rxdmaerror(SLMP_INFO * info)
2451 {
2452 /* BIT5 = BOF (buffer overflow)
2453 * BIT4 = COF (counter overflow)
2454 */
2455 unsigned char status = read_reg(info,RXDMA + DSR) & 0x30;
2456
2457 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2458 write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
2459
2460 if ( debug_level >= DEBUG_LEVEL_ISR )
2461 printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n",
2462 __FILE__,__LINE__,info->device_name,status);
2463
2464 info->rx_overflow = TRUE;
2465 info->pending_bh |= BH_RECEIVE;
2466 }
2467
2468 void isr_txdmaok(SLMP_INFO * info)
2469 {
2470 unsigned char status_reg1 = read_reg(info, SR1);
2471
2472 write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
2473 write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
2474 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
2475
2476 if ( debug_level >= DEBUG_LEVEL_ISR )
2477 printk("%s(%d):%s isr_txdmaok(), status=%02x\n",
2478 __FILE__,__LINE__,info->device_name,status_reg1);
2479
2480 /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */
2481 write_reg16(info, TRC0, 0);
2482 info->ie0_value |= TXRDYE;
2483 write_reg(info, IE0, info->ie0_value);
2484 }
2485
2486 void isr_txdmaerror(SLMP_INFO * info)
2487 {
2488 /* BIT5 = BOF (buffer overflow)
2489 * BIT4 = COF (counter overflow)
2490 */
2491 unsigned char status = read_reg(info,TXDMA + DSR) & 0x30;
2492
2493 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2494 write_reg(info, TXDMA + DSR, (unsigned char)(status | 1));
2495
2496 if ( debug_level >= DEBUG_LEVEL_ISR )
2497 printk("%s(%d):%s isr_txdmaerror(), status=%02x\n",
2498 __FILE__,__LINE__,info->device_name,status);
2499 }
2500
2501 /* handle input serial signal changes
2502 */
2503 void isr_io_pin( SLMP_INFO *info, u16 status )
2504 {
2505 struct mgsl_icount *icount;
2506
2507 if ( debug_level >= DEBUG_LEVEL_ISR )
2508 printk("%s(%d):isr_io_pin status=%04X\n",
2509 __FILE__,__LINE__,status);
2510
2511 if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
2512 MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
2513 icount = &info->icount;
2514 /* update input line counters */
2515 if (status & MISCSTATUS_RI_LATCHED) {
2516 icount->rng++;
2517 if ( status & SerialSignal_RI )
2518 info->input_signal_events.ri_up++;
2519 else
2520 info->input_signal_events.ri_down++;
2521 }
2522 if (status & MISCSTATUS_DSR_LATCHED) {
2523 icount->dsr++;
2524 if ( status & SerialSignal_DSR )
2525 info->input_signal_events.dsr_up++;
2526 else
2527 info->input_signal_events.dsr_down++;
2528 }
2529 if (status & MISCSTATUS_DCD_LATCHED) {
2530 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
2531 info->ie1_value &= ~CDCD;
2532 write_reg(info, IE1, info->ie1_value);
2533 }
2534 icount->dcd++;
2535 if (status & SerialSignal_DCD) {
2536 info->input_signal_events.dcd_up++;
2537 } else
2538 info->input_signal_events.dcd_down++;
2539 #ifdef CONFIG_HDLC
2540 if (info->netcount)
2541 hdlc_set_carrier(status & SerialSignal_DCD, info->netdev);
2542 #endif
2543 }
2544 if (status & MISCSTATUS_CTS_LATCHED)
2545 {
2546 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
2547 info->ie1_value &= ~CCTS;
2548 write_reg(info, IE1, info->ie1_value);
2549 }
2550 icount->cts++;
2551 if ( status & SerialSignal_CTS )
2552 info->input_signal_events.cts_up++;
2553 else
2554 info->input_signal_events.cts_down++;
2555 }
2556 wake_up_interruptible(&info->status_event_wait_q);
2557 wake_up_interruptible(&info->event_wait_q);
2558
2559 if ( (info->flags & ASYNC_CHECK_CD) &&
2560 (status & MISCSTATUS_DCD_LATCHED) ) {
2561 if ( debug_level >= DEBUG_LEVEL_ISR )
2562 printk("%s CD now %s...", info->device_name,
2563 (status & SerialSignal_DCD) ? "on" : "off");
2564 if (status & SerialSignal_DCD)
2565 wake_up_interruptible(&info->open_wait);
2566 else {
2567 if ( debug_level >= DEBUG_LEVEL_ISR )
2568 printk("doing serial hangup...");
2569 if (info->tty)
2570 tty_hangup(info->tty);
2571 }
2572 }
2573
2574 if ( (info->flags & ASYNC_CTS_FLOW) &&
2575 (status & MISCSTATUS_CTS_LATCHED) ) {
2576 if ( info->tty ) {
2577 if (info->tty->hw_stopped) {
2578 if (status & SerialSignal_CTS) {
2579 if ( debug_level >= DEBUG_LEVEL_ISR )
2580 printk("CTS tx start...");
2581 info->tty->hw_stopped = 0;
2582 tx_start(info);
2583 info->pending_bh |= BH_TRANSMIT;
2584 return;
2585 }
2586 } else {
2587 if (!(status & SerialSignal_CTS)) {
2588 if ( debug_level >= DEBUG_LEVEL_ISR )
2589 printk("CTS tx stop...");
2590 info->tty->hw_stopped = 1;
2591 tx_stop(info);
2592 }
2593 }
2594 }
2595 }
2596 }
2597
2598 info->pending_bh |= BH_STATUS;
2599 }
2600
2601 /* Interrupt service routine entry point.
2602 *
2603 * Arguments:
2604 * irq interrupt number that caused interrupt
2605 * dev_id device ID supplied during interrupt registration
2606 * regs interrupted processor context
2607 */
2608 static irqreturn_t synclinkmp_interrupt(int irq, void *dev_id,
2609 struct pt_regs *regs)
2610 {
2611 SLMP_INFO * info;
2612 unsigned char status, status0, status1=0;
2613 unsigned char dmastatus, dmastatus0, dmastatus1=0;
2614 unsigned char timerstatus0, timerstatus1=0;
2615 unsigned char shift;
2616 unsigned int i;
2617 unsigned short tmp;
2618
2619 if ( debug_level >= DEBUG_LEVEL_ISR )
2620 printk("%s(%d): synclinkmp_interrupt(%d)entry.\n",
2621 __FILE__,__LINE__,irq);
2622
2623 info = (SLMP_INFO *)dev_id;
2624 if (!info)
2625 return IRQ_NONE;
2626
2627 spin_lock(&info->lock);
2628
2629 for(;;) {
2630
2631 /* get status for SCA0 (ports 0-1) */
2632 tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */
2633 status0 = (unsigned char)tmp;
2634 dmastatus0 = (unsigned char)(tmp>>8);
2635 timerstatus0 = read_reg(info, ISR2);
2636
2637 if ( debug_level >= DEBUG_LEVEL_ISR )
2638 printk("%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
2639 __FILE__,__LINE__,info->device_name,
2640 status0,dmastatus0,timerstatus0);
2641
2642 if (info->port_count == 4) {
2643 /* get status for SCA1 (ports 2-3) */
2644 tmp = read_reg16(info->port_array[2], ISR0);
2645 status1 = (unsigned char)tmp;
2646 dmastatus1 = (unsigned char)(tmp>>8);
2647 timerstatus1 = read_reg(info->port_array[2], ISR2);
2648
2649 if ( debug_level >= DEBUG_LEVEL_ISR )
2650 printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n",
2651 __FILE__,__LINE__,info->device_name,
2652 status1,dmastatus1,timerstatus1);
2653 }
2654
2655 if (!status0 && !dmastatus0 && !timerstatus0 &&
2656 !status1 && !dmastatus1 && !timerstatus1)
2657 break;
2658
2659 for(i=0; i < info->port_count ; i++) {
2660 if (info->port_array[i] == NULL)
2661 continue;
2662 if (i < 2) {
2663 status = status0;
2664 dmastatus = dmastatus0;
2665 } else {
2666 status = status1;
2667 dmastatus = dmastatus1;
2668 }
2669
2670 shift = i & 1 ? 4 :0;
2671
2672 if (status & BIT0 << shift)
2673 isr_rxrdy(info->port_array[i]);
2674 if (status & BIT1 << shift)
2675 isr_txrdy(info->port_array[i]);
2676 if (status & BIT2 << shift)
2677 isr_rxint(info->port_array[i]);
2678 if (status & BIT3 << shift)
2679 isr_txint(info->port_array[i]);
2680
2681 if (dmastatus & BIT0 << shift)
2682 isr_rxdmaerror(info->port_array[i]);
2683 if (dmastatus & BIT1 << shift)
2684 isr_rxdmaok(info->port_array[i]);
2685 if (dmastatus & BIT2 << shift)
2686 isr_txdmaerror(info->port_array[i]);
2687 if (dmastatus & BIT3 << shift)
2688 isr_txdmaok(info->port_array[i]);
2689 }
2690
2691 if (timerstatus0 & (BIT5 | BIT4))
2692 isr_timer(info->port_array[0]);
2693 if (timerstatus0 & (BIT7 | BIT6))
2694 isr_timer(info->port_array[1]);
2695 if (timerstatus1 & (BIT5 | BIT4))
2696 isr_timer(info->port_array[2]);
2697 if (timerstatus1 & (BIT7 | BIT6))
2698 isr_timer(info->port_array[3]);
2699 }
2700
2701 for(i=0; i < info->port_count ; i++) {
2702 SLMP_INFO * port = info->port_array[i];
2703
2704 /* Request bottom half processing if there's something
2705 * for it to do and the bh is not already running.
2706 *
2707 * Note: startup adapter diags require interrupts.
2708 * do not request bottom half processing if the
2709 * device is not open in a normal mode.
2710 */
2711 if ( port && (port->count || port->netcount) &&
2712 port->pending_bh && !port->bh_running &&
2713 !port->bh_requested ) {
2714 if ( debug_level >= DEBUG_LEVEL_ISR )
2715 printk("%s(%d):%s queueing bh task.\n",
2716 __FILE__,__LINE__,port->device_name);
2717 schedule_work(&port->task);
2718 port->bh_requested = 1;
2719 }
2720 }
2721
2722 spin_unlock(&info->lock);
2723
2724 if ( debug_level >= DEBUG_LEVEL_ISR )
2725 printk("%s(%d):synclinkmp_interrupt(%d)exit.\n",
2726 __FILE__,__LINE__,irq);
2727 return IRQ_HANDLED;
2728 }
2729
2730 /* Initialize and start device.
2731 */
2732 static int startup(SLMP_INFO * info)
2733 {
2734 if ( debug_level >= DEBUG_LEVEL_INFO )
2735 printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name);
2736
2737 if (info->flags & ASYNC_INITIALIZED)
2738 return 0;
2739
2740 if (!info->tx_buf) {
2741 info->tx_buf = (unsigned char *)kmalloc(info->max_frame_size, GFP_KERNEL);
2742 if (!info->tx_buf) {
2743 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
2744 __FILE__,__LINE__,info->device_name);
2745 return -ENOMEM;
2746 }
2747 }
2748
2749 info->pending_bh = 0;
2750
2751 memset(&info->icount, 0, sizeof(info->icount));
2752
2753 /* program hardware for current parameters */
2754 reset_port(info);
2755
2756 change_params(info);
2757
2758 info->status_timer.expires = jiffies + msecs_to_jiffies(10);
2759 add_timer(&info->status_timer);
2760
2761 if (info->tty)
2762 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2763
2764 info->flags |= ASYNC_INITIALIZED;
2765
2766 return 0;
2767 }
2768
2769 /* Called by close() and hangup() to shutdown hardware
2770 */
2771 static void shutdown(SLMP_INFO * info)
2772 {
2773 unsigned long flags;
2774
2775 if (!(info->flags & ASYNC_INITIALIZED))
2776 return;
2777
2778 if (debug_level >= DEBUG_LEVEL_INFO)
2779 printk("%s(%d):%s synclinkmp_shutdown()\n",
2780 __FILE__,__LINE__, info->device_name );
2781
2782 /* clear status wait queue because status changes */
2783 /* can't happen after shutting down the hardware */
2784 wake_up_interruptible(&info->status_event_wait_q);
2785 wake_up_interruptible(&info->event_wait_q);
2786
2787 del_timer(&info->tx_timer);
2788 del_timer(&info->status_timer);
2789
2790 kfree(info->tx_buf);
2791 info->tx_buf = NULL;
2792
2793 spin_lock_irqsave(&info->lock,flags);
2794
2795 reset_port(info);
2796
2797 if (!info->tty || info->tty->termios->c_cflag & HUPCL) {
2798 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
2799 set_signals(info);
2800 }
2801
2802 spin_unlock_irqrestore(&info->lock,flags);
2803
2804 if (info->tty)
2805 set_bit(TTY_IO_ERROR, &info->tty->flags);
2806
2807 info->flags &= ~ASYNC_INITIALIZED;
2808 }
2809
2810 static void program_hw(SLMP_INFO *info)
2811 {
2812 unsigned long flags;
2813
2814 spin_lock_irqsave(&info->lock,flags);
2815
2816 rx_stop(info);
2817 tx_stop(info);
2818
2819 info->tx_count = info->tx_put = info->tx_get = 0;
2820
2821 if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
2822 hdlc_mode(info);
2823 else
2824 async_mode(info);
2825
2826 set_signals(info);
2827
2828 info->dcd_chkcount = 0;
2829 info->cts_chkcount = 0;
2830 info->ri_chkcount = 0;
2831 info->dsr_chkcount = 0;
2832
2833 info->ie1_value |= (CDCD|CCTS);
2834 write_reg(info, IE1, info->ie1_value);
2835
2836 get_signals(info);
2837
2838 if (info->netcount || (info->tty && info->tty->termios->c_cflag & CREAD) )
2839 rx_start(info);
2840
2841 spin_unlock_irqrestore(&info->lock,flags);
2842 }
2843
2844 /* Reconfigure adapter based on new parameters
2845 */
2846 static void change_params(SLMP_INFO *info)
2847 {
2848 unsigned cflag;
2849 int bits_per_char;
2850
2851 if (!info->tty || !info->tty->termios)
2852 return;
2853
2854 if (debug_level >= DEBUG_LEVEL_INFO)
2855 printk("%s(%d):%s change_params()\n",
2856 __FILE__,__LINE__, info->device_name );
2857
2858 cflag = info->tty->termios->c_cflag;
2859
2860 /* if B0 rate (hangup) specified then negate DTR and RTS */
2861 /* otherwise assert DTR and RTS */
2862 if (cflag & CBAUD)
2863 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2864 else
2865 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
2866
2867 /* byte size and parity */
2868
2869 switch (cflag & CSIZE) {
2870 case CS5: info->params.data_bits = 5; break;
2871 case CS6: info->params.data_bits = 6; break;
2872 case CS7: info->params.data_bits = 7; break;
2873 case CS8: info->params.data_bits = 8; break;
2874 /* Never happens, but GCC is too dumb to figure it out */
2875 default: info->params.data_bits = 7; break;
2876 }
2877
2878 if (cflag & CSTOPB)
2879 info->params.stop_bits = 2;
2880 else
2881 info->params.stop_bits = 1;
2882
2883 info->params.parity = ASYNC_PARITY_NONE;
2884 if (cflag & PARENB) {
2885 if (cflag & PARODD)
2886 info->params.parity = ASYNC_PARITY_ODD;
2887 else
2888 info->params.parity = ASYNC_PARITY_EVEN;
2889 #ifdef CMSPAR
2890 if (cflag & CMSPAR)
2891 info->params.parity = ASYNC_PARITY_SPACE;
2892 #endif
2893 }
2894
2895 /* calculate number of jiffies to transmit a full
2896 * FIFO (32 bytes) at specified data rate
2897 */
2898 bits_per_char = info->params.data_bits +
2899 info->params.stop_bits + 1;
2900
2901 /* if port data rate is set to 460800 or less then
2902 * allow tty settings to override, otherwise keep the
2903 * current data rate.
2904 */
2905 if (info->params.data_rate <= 460800) {
2906 info->params.data_rate = tty_get_baud_rate(info->tty);
2907 }
2908
2909 if ( info->params.data_rate ) {
2910 info->timeout = (32*HZ*bits_per_char) /
2911 info->params.data_rate;
2912 }
2913 info->timeout += HZ/50; /* Add .02 seconds of slop */
2914
2915 if (cflag & CRTSCTS)
2916 info->flags |= ASYNC_CTS_FLOW;
2917 else
2918 info->flags &= ~ASYNC_CTS_FLOW;
2919
2920 if (cflag & CLOCAL)
2921 info->flags &= ~ASYNC_CHECK_CD;
2922 else
2923 info->flags |= ASYNC_CHECK_CD;
2924
2925 /* process tty input control flags */
2926
2927 info->read_status_mask2 = OVRN;
2928 if (I_INPCK(info->tty))
2929 info->read_status_mask2 |= PE | FRME;
2930 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2931 info->read_status_mask1 |= BRKD;
2932 if (I_IGNPAR(info->tty))
2933 info->ignore_status_mask2 |= PE | FRME;
2934 if (I_IGNBRK(info->tty)) {
2935 info->ignore_status_mask1 |= BRKD;
2936 /* If ignoring parity and break indicators, ignore
2937 * overruns too. (For real raw support).
2938 */
2939 if (I_IGNPAR(info->tty))
2940 info->ignore_status_mask2 |= OVRN;
2941 }
2942
2943 program_hw(info);
2944 }
2945
2946 static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
2947 {
2948 int err;
2949
2950 if (debug_level >= DEBUG_LEVEL_INFO)
2951 printk("%s(%d):%s get_params()\n",
2952 __FILE__,__LINE__, info->device_name);
2953
2954 if (!user_icount) {
2955 memset(&info->icount, 0, sizeof(info->icount));
2956 } else {
2957 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
2958 if (err)
2959 return -EFAULT;
2960 }
2961
2962 return 0;
2963 }
2964
2965 static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params)
2966 {
2967 int err;
2968 if (debug_level >= DEBUG_LEVEL_INFO)
2969 printk("%s(%d):%s get_params()\n",
2970 __FILE__,__LINE__, info->device_name);
2971
2972 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
2973 if (err) {
2974 if ( debug_level >= DEBUG_LEVEL_INFO )
2975 printk( "%s(%d):%s get_params() user buffer copy failed\n",
2976 __FILE__,__LINE__,info->device_name);
2977 return -EFAULT;
2978 }
2979
2980 return 0;
2981 }
2982
2983 static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params)
2984 {
2985 unsigned long flags;
2986 MGSL_PARAMS tmp_params;
2987 int err;
2988
2989 if (debug_level >= DEBUG_LEVEL_INFO)
2990 printk("%s(%d):%s set_params\n",
2991 __FILE__,__LINE__,info->device_name );
2992 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
2993 if (err) {
2994 if ( debug_level >= DEBUG_LEVEL_INFO )
2995 printk( "%s(%d):%s set_params() user buffer copy failed\n",
2996 __FILE__,__LINE__,info->device_name);
2997 return -EFAULT;
2998 }
2999
3000 spin_lock_irqsave(&info->lock,flags);
3001 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
3002 spin_unlock_irqrestore(&info->lock,flags);
3003
3004 change_params(info);
3005
3006 return 0;
3007 }
3008
3009 static int get_txidle(SLMP_INFO * info, int __user *idle_mode)
3010 {
3011 int err;
3012
3013 if (debug_level >= DEBUG_LEVEL_INFO)
3014 printk("%s(%d):%s get_txidle()=%d\n",
3015 __FILE__,__LINE__, info->device_name, info->idle_mode);
3016
3017 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
3018 if (err) {
3019 if ( debug_level >= DEBUG_LEVEL_INFO )
3020 printk( "%s(%d):%s get_txidle() user buffer copy failed\n",
3021 __FILE__,__LINE__,info->device_name);
3022 return -EFAULT;
3023 }
3024
3025 return 0;
3026 }
3027
3028 static int set_txidle(SLMP_INFO * info, int idle_mode)
3029 {
3030 unsigned long flags;
3031
3032 if (debug_level >= DEBUG_LEVEL_INFO)
3033 printk("%s(%d):%s set_txidle(%d)\n",
3034 __FILE__,__LINE__,info->device_name, idle_mode );
3035
3036 spin_lock_irqsave(&info->lock,flags);
3037 info->idle_mode = idle_mode;
3038 tx_set_idle( info );
3039 spin_unlock_irqrestore(&info->lock,flags);
3040 return 0;
3041 }
3042
3043 static int tx_enable(SLMP_INFO * info, int enable)
3044 {
3045 unsigned long flags;
3046
3047 if (debug_level >= DEBUG_LEVEL_INFO)
3048 printk("%s(%d):%s tx_enable(%d)\n",
3049 __FILE__,__LINE__,info->device_name, enable);
3050
3051 spin_lock_irqsave(&info->lock,flags);
3052 if ( enable ) {
3053 if ( !info->tx_enabled ) {
3054 tx_start(info);
3055 }
3056 } else {
3057 if ( info->tx_enabled )
3058 tx_stop(info);
3059 }
3060 spin_unlock_irqrestore(&info->lock,flags);
3061 return 0;
3062 }
3063
3064 /* abort send HDLC frame
3065 */
3066 static int tx_abort(SLMP_INFO * info)
3067 {
3068 unsigned long flags;
3069
3070 if (debug_level >= DEBUG_LEVEL_INFO)
3071 printk("%s(%d):%s tx_abort()\n",
3072 __FILE__,__LINE__,info->device_name);
3073
3074 spin_lock_irqsave(&info->lock,flags);
3075 if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) {
3076 info->ie1_value &= ~UDRN;
3077 info->ie1_value |= IDLE;
3078 write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
3079 write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
3080
3081 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
3082 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
3083
3084 write_reg(info, CMD, TXABORT);
3085 }
3086 spin_unlock_irqrestore(&info->lock,flags);
3087 return 0;
3088 }
3089
3090 static int rx_enable(SLMP_INFO * info, int enable)
3091 {
3092 unsigned long flags;
3093
3094 if (debug_level >= DEBUG_LEVEL_INFO)
3095 printk("%s(%d):%s rx_enable(%d)\n",
3096 __FILE__,__LINE__,info->device_name,enable);
3097
3098 spin_lock_irqsave(&info->lock,flags);
3099 if ( enable ) {
3100 if ( !info->rx_enabled )
3101 rx_start(info);
3102 } else {
3103 if ( info->rx_enabled )
3104 rx_stop(info);
3105 }
3106 spin_unlock_irqrestore(&info->lock,flags);
3107 return 0;
3108 }
3109
3110 /* wait for specified event to occur
3111 */
3112 static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr)
3113 {
3114 unsigned long flags;
3115 int s;
3116 int rc=0;
3117 struct mgsl_icount cprev, cnow;
3118 int events;
3119 int mask;
3120 struct _input_signal_events oldsigs, newsigs;
3121 DECLARE_WAITQUEUE(wait, current);
3122
3123 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
3124 if (rc) {
3125 return -EFAULT;
3126 }
3127
3128 if (debug_level >= DEBUG_LEVEL_INFO)
3129 printk("%s(%d):%s wait_mgsl_event(%d)\n",
3130 __FILE__,__LINE__,info->device_name,mask);
3131
3132 spin_lock_irqsave(&info->lock,flags);
3133
3134 /* return immediately if state matches requested events */
3135 get_signals(info);
3136 s = info->serial_signals;
3137
3138 events = mask &
3139 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
3140 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
3141 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
3142 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
3143 if (events) {
3144 spin_unlock_irqrestore(&info->lock,flags);
3145 goto exit;
3146 }
3147
3148 /* save current irq counts */
3149 cprev = info->icount;
3150 oldsigs = info->input_signal_events;
3151
3152 /* enable hunt and idle irqs if needed */
3153 if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
3154 unsigned char oldval = info->ie1_value;
3155 unsigned char newval = oldval +
3156 (mask & MgslEvent_ExitHuntMode ? FLGD:0) +
3157 (mask & MgslEvent_IdleReceived ? IDLD:0);
3158 if ( oldval != newval ) {
3159 info->ie1_value = newval;
3160 write_reg(info, IE1, info->ie1_value);
3161 }
3162 }
3163
3164 set_current_state(TASK_INTERRUPTIBLE);
3165 add_wait_queue(&info->event_wait_q, &wait);
3166
3167 spin_unlock_irqrestore(&info->lock,flags);
3168
3169 for(;;) {
3170 schedule();
3171 if (signal_pending(current)) {
3172 rc = -ERESTARTSYS;
3173 break;
3174 }
3175
3176 /* get current irq counts */
3177 spin_lock_irqsave(&info->lock,flags);
3178 cnow = info->icount;
3179 newsigs = info->input_signal_events;
3180 set_current_state(TASK_INTERRUPTIBLE);
3181 spin_unlock_irqrestore(&info->lock,flags);
3182
3183 /* if no change, wait aborted for some reason */
3184 if (newsigs.dsr_up == oldsigs.dsr_up &&
3185 newsigs.dsr_down == oldsigs.dsr_down &&
3186 newsigs.dcd_up == oldsigs.dcd_up &&
3187 newsigs.dcd_down == oldsigs.dcd_down &&
3188 newsigs.cts_up == oldsigs.cts_up &&
3189 newsigs.cts_down == oldsigs.cts_down &&
3190 newsigs.ri_up == oldsigs.ri_up &&
3191 newsigs.ri_down == oldsigs.ri_down &&
3192 cnow.exithunt == cprev.exithunt &&
3193 cnow.rxidle == cprev.rxidle) {
3194 rc = -EIO;
3195 break;
3196 }
3197
3198 events = mask &
3199 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
3200 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
3201 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
3202 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
3203 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
3204 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
3205 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
3206 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
3207 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
3208 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
3209 if (events)
3210 break;
3211
3212 cprev = cnow;
3213 oldsigs = newsigs;
3214 }
3215
3216 remove_wait_queue(&info->event_wait_q, &wait);
3217 set_current_state(TASK_RUNNING);
3218
3219
3220 if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
3221 spin_lock_irqsave(&info->lock,flags);
3222 if (!waitqueue_active(&info->event_wait_q)) {
3223 /* disable enable exit hunt mode/idle rcvd IRQs */
3224 info->ie1_value &= ~(FLGD|IDLD);
3225 write_reg(info, IE1, info->ie1_value);
3226 }
3227 spin_unlock_irqrestore(&info->lock,flags);
3228 }
3229 exit:
3230 if ( rc == 0 )
3231 PUT_USER(rc, events, mask_ptr);
3232
3233 return rc;
3234 }
3235
3236 static int modem_input_wait(SLMP_INFO *info,int arg)
3237 {
3238 unsigned long flags;
3239 int rc;
3240 struct mgsl_icount cprev, cnow;
3241 DECLARE_WAITQUEUE(wait, current);
3242
3243 /* save current irq counts */
3244 spin_lock_irqsave(&info->lock,flags);
3245 cprev = info->icount;
3246 add_wait_queue(&info->status_event_wait_q, &wait);
3247 set_current_state(TASK_INTERRUPTIBLE);
3248 spin_unlock_irqrestore(&info->lock,flags);
3249
3250 for(;;) {
3251 schedule();
3252 if (signal_pending(current)) {
3253 rc = -ERESTARTSYS;
3254 break;
3255 }
3256
3257 /* get new irq counts */
3258 spin_lock_irqsave(&info->lock,flags);
3259 cnow = info->icount;
3260 set_current_state(TASK_INTERRUPTIBLE);
3261 spin_unlock_irqrestore(&info->lock,flags);
3262
3263 /* if no change, wait aborted for some reason */
3264 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
3265 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
3266 rc = -EIO;
3267 break;
3268 }
3269
3270 /* check for change in caller specified modem input */
3271 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
3272 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
3273 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
3274 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
3275 rc = 0;
3276 break;
3277 }
3278
3279 cprev = cnow;
3280 }
3281 remove_wait_queue(&info->status_event_wait_q, &wait);
3282 set_current_state(TASK_RUNNING);
3283 return rc;
3284 }
3285
3286 /* return the state of the serial control and status signals
3287 */
3288 static int tiocmget(struct tty_struct *tty, struct file *file)
3289 {
3290 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
3291 unsigned int result;
3292 unsigned long flags;
3293
3294 spin_lock_irqsave(&info->lock,flags);
3295 get_signals(info);
3296 spin_unlock_irqrestore(&info->lock,flags);
3297
3298 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
3299 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
3300 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
3301 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
3302 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
3303 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
3304
3305 if (debug_level >= DEBUG_LEVEL_INFO)
3306 printk("%s(%d):%s tiocmget() value=%08X\n",
3307 __FILE__,__LINE__, info->device_name, result );
3308 return result;
3309 }
3310
3311 /* set modem control signals (DTR/RTS)
3312 */
3313 static int tiocmset(struct tty_struct *tty, struct file *file,
3314 unsigned int set, unsigned int clear)
3315 {
3316 SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
3317 unsigned long flags;
3318
3319 if (debug_level >= DEBUG_LEVEL_INFO)
3320 printk("%s(%d):%s tiocmset(%x,%x)\n",
3321 __FILE__,__LINE__,info->device_name, set, clear);
3322
3323 if (set & TIOCM_RTS)
3324 info->serial_signals |= SerialSignal_RTS;
3325 if (set & TIOCM_DTR)
3326 info->serial_signals |= SerialSignal_DTR;
3327 if (clear & TIOCM_RTS)
3328 info->serial_signals &= ~SerialSignal_RTS;
3329 if (clear & TIOCM_DTR)
3330 info->serial_signals &= ~SerialSignal_DTR;
3331
3332 spin_lock_irqsave(&info->lock,flags);
3333 set_signals(info);
3334 spin_unlock_irqrestore(&info->lock,flags);
3335
3336 return 0;
3337 }
3338
3339
3340
3341 /* Block the current process until the specified port is ready to open.
3342 */
3343 static int block_til_ready(struct tty_struct *tty, struct file *filp,
3344 SLMP_INFO *info)
3345 {
3346 DECLARE_WAITQUEUE(wait, current);
3347 int retval;
3348 int do_clocal = 0, extra_count = 0;
3349 unsigned long flags;
3350
3351 if (debug_level >= DEBUG_LEVEL_INFO)
3352 printk("%s(%d):%s block_til_ready()\n",
3353 __FILE__,__LINE__, tty->driver->name );
3354
3355 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
3356 /* nonblock mode is set or port is not enabled */
3357 /* just verify that callout device is not active */
3358 info->flags |= ASYNC_NORMAL_ACTIVE;
3359 return 0;
3360 }
3361
3362 if (tty->termios->c_cflag & CLOCAL)
3363 do_clocal = 1;
3364
3365 /* Wait for carrier detect and the line to become
3366 * free (i.e., not in use by the callout). While we are in
3367 * this loop, info->count is dropped by one, so that
3368 * close() knows when to free things. We restore it upon
3369 * exit, either normal or abnormal.
3370 */
3371
3372 retval = 0;
3373 add_wait_queue(&info->open_wait, &wait);
3374
3375 if (debug_level >= DEBUG_LEVEL_INFO)
3376 printk("%s(%d):%s block_til_ready() before block, count=%d\n",
3377 __FILE__,__LINE__, tty->driver->name, info->count );
3378
3379 spin_lock_irqsave(&info->lock, flags);
3380 if (!tty_hung_up_p(filp)) {
3381 extra_count = 1;
3382 info->count--;
3383 }
3384 spin_unlock_irqrestore(&info->lock, flags);
3385 info->blocked_open++;
3386
3387 while (1) {
3388 if ((tty->termios->c_cflag & CBAUD)) {
3389 spin_lock_irqsave(&info->lock,flags);
3390 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
3391 set_signals(info);
3392 spin_unlock_irqrestore(&info->lock,flags);
3393 }
3394
3395 set_current_state(TASK_INTERRUPTIBLE);
3396
3397 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
3398 retval = (info->flags & ASYNC_HUP_NOTIFY) ?
3399 -EAGAIN : -ERESTARTSYS;
3400 break;
3401 }
3402
3403 spin_lock_irqsave(&info->lock,flags);
3404 get_signals(info);
3405 spin_unlock_irqrestore(&info->lock,flags);
3406
3407 if (!(info->flags & ASYNC_CLOSING) &&
3408 (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
3409 break;
3410 }
3411
3412 if (signal_pending(current)) {
3413 retval = -ERESTARTSYS;
3414 break;
3415 }
3416
3417 if (debug_level >= DEBUG_LEVEL_INFO)
3418 printk("%s(%d):%s block_til_ready() count=%d\n",
3419 __FILE__,__LINE__, tty->driver->name, info->count );
3420
3421 schedule();
3422 }
3423
3424 set_current_state(TASK_RUNNING);
3425 remove_wait_queue(&info->open_wait, &wait);
3426
3427 if (extra_count)
3428 info->count++;
3429 info->blocked_open--;
3430
3431 if (debug_level >= DEBUG_LEVEL_INFO)
3432 printk("%s(%d):%s block_til_ready() after, count=%d\n",
3433 __FILE__,__LINE__, tty->driver->name, info->count );
3434
3435 if (!retval)
3436 info->flags |= ASYNC_NORMAL_ACTIVE;
3437
3438 return retval;
3439 }
3440
3441 int alloc_dma_bufs(SLMP_INFO *info)
3442 {
3443 unsigned short BuffersPerFrame;
3444 unsigned short BufferCount;
3445
3446 // Force allocation to start at 64K boundary for each port.
3447 // This is necessary because *all* buffer descriptors for a port
3448 // *must* be in the same 64K block. All descriptors on a port
3449 // share a common 'base' address (upper 8 bits of 24 bits) programmed
3450 // into the CBP register.
3451 info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num;
3452
3453 /* Calculate the number of DMA buffers necessary to hold the */
3454 /* largest allowable frame size. Note: If the max frame size is */
3455 /* not an even multiple of the DMA buffer size then we need to */
3456 /* round the buffer count per frame up one. */
3457
3458 BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE);
3459 if ( info->max_frame_size % SCABUFSIZE )
3460 BuffersPerFrame++;
3461
3462 /* calculate total number of data buffers (SCABUFSIZE) possible
3463 * in one ports memory (SCA_MEM_SIZE/4) after allocating memory
3464 * for the descriptor list (BUFFERLISTSIZE).
3465 */
3466 BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE;
3467
3468 /* limit number of buffers to maximum amount of descriptors */
3469 if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC))
3470 BufferCount = BUFFERLISTSIZE/sizeof(SCADESC);
3471
3472 /* use enough buffers to transmit one max size frame */
3473 info->tx_buf_count = BuffersPerFrame + 1;
3474
3475 /* never use more than half the available buffers for transmit */
3476 if (info->tx_buf_count > (BufferCount/2))
3477 info->tx_buf_count = BufferCount/2;
3478
3479 if (info->tx_buf_count > SCAMAXDESC)
3480 info->tx_buf_count = SCAMAXDESC;
3481
3482 /* use remaining buffers for receive */
3483 info->rx_buf_count = BufferCount - info->tx_buf_count;
3484
3485 if (info->rx_buf_count > SCAMAXDESC)
3486 info->rx_buf_count = SCAMAXDESC;
3487
3488 if ( debug_level >= DEBUG_LEVEL_INFO )
3489 printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n",
3490 __FILE__,__LINE__, info->device_name,
3491 info->tx_buf_count,info->rx_buf_count);
3492
3493 if ( alloc_buf_list( info ) < 0 ||
3494 alloc_frame_bufs(info,
3495 info->rx_buf_list,
3496 info->rx_buf_list_ex,
3497 info->rx_buf_count) < 0 ||
3498 alloc_frame_bufs(info,
3499 info->tx_buf_list,
3500 info->tx_buf_list_ex,
3501 info->tx_buf_count) < 0 ||
3502 alloc_tmp_rx_buf(info) < 0 ) {
3503 printk("%s(%d):%s Can't allocate DMA buffer memory\n",
3504 __FILE__,__LINE__, info->device_name);
3505 return -ENOMEM;
3506 }
3507
3508 rx_reset_buffers( info );
3509
3510 return 0;
3511 }
3512
3513 /* Allocate DMA buffers for the transmit and receive descriptor lists.
3514 */
3515 int alloc_buf_list(SLMP_INFO *info)
3516 {
3517 unsigned int i;
3518
3519 /* build list in adapter shared memory */
3520 info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc;
3521 info->buffer_list_phys = info->port_array[0]->last_mem_alloc;
3522 info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE;
3523
3524 memset(info->buffer_list, 0, BUFFERLISTSIZE);
3525
3526 /* Save virtual address pointers to the receive and */
3527 /* transmit buffer lists. (Receive 1st). These pointers will */
3528 /* be used by the processor to access the lists. */
3529 info->rx_buf_list = (SCADESC *)info->buffer_list;
3530
3531 info->tx_buf_list = (SCADESC *)info->buffer_list;
3532 info->tx_buf_list += info->rx_buf_count;
3533
3534 /* Build links for circular buffer entry lists (tx and rx)
3535 *
3536 * Note: links are physical addresses read by the SCA device
3537 * to determine the next buffer entry to use.
3538 */
3539
3540 for ( i = 0; i < info->rx_buf_count; i++ ) {
3541 /* calculate and store physical address of this buffer entry */
3542 info->rx_buf_list_ex[i].phys_entry =
3543 info->buffer_list_phys + (i * sizeof(SCABUFSIZE));
3544
3545 /* calculate and store physical address of */
3546 /* next entry in cirular list of entries */
3547 info->rx_buf_list[i].next = info->buffer_list_phys;
3548 if ( i < info->rx_buf_count - 1 )
3549 info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
3550
3551 info->rx_buf_list[i].length = SCABUFSIZE;
3552 }
3553
3554 for ( i = 0; i < info->tx_buf_count; i++ ) {
3555 /* calculate and store physical address of this buffer entry */
3556 info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys +
3557 ((info->rx_buf_count + i) * sizeof(SCADESC));
3558
3559 /* calculate and store physical address of */
3560 /* next entry in cirular list of entries */
3561
3562 info->tx_buf_list[i].next = info->buffer_list_phys +
3563 info->rx_buf_count * sizeof(SCADESC);
3564
3565 if ( i < info->tx_buf_count - 1 )
3566 info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
3567 }
3568
3569 return 0;
3570 }
3571
3572 /* Allocate the frame DMA buffers used by the specified buffer list.
3573 */
3574 int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count)
3575 {
3576 int i;
3577 unsigned long phys_addr;
3578
3579 for ( i = 0; i < count; i++ ) {
3580 buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc;
3581 phys_addr = info->port_array[0]->last_mem_alloc;
3582 info->port_array[0]->last_mem_alloc += SCABUFSIZE;
3583
3584 buf_list[i].buf_ptr = (unsigned short)phys_addr;
3585 buf_list[i].buf_base = (unsigned char)(phys_addr >> 16);
3586 }
3587
3588 return 0;
3589 }
3590
3591 void free_dma_bufs(SLMP_INFO *info)
3592 {
3593 info->buffer_list = NULL;
3594 info->rx_buf_list = NULL;
3595 info->tx_buf_list = NULL;
3596 }
3597
3598 /* allocate buffer large enough to hold max_frame_size.
3599 * This buffer is used to pass an assembled frame to the line discipline.
3600 */
3601 int alloc_tmp_rx_buf(SLMP_INFO *info)
3602 {
3603 info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
3604 if (info->tmp_rx_buf == NULL)
3605 return -ENOMEM;
3606 return 0;
3607 }
3608
3609 void free_tmp_rx_buf(SLMP_INFO *info)
3610 {
3611 kfree(info->tmp_rx_buf);
3612 info->tmp_rx_buf = NULL;
3613 }
3614
3615 int claim_resources(SLMP_INFO *info)
3616 {
3617 if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) {
3618 printk( "%s(%d):%s mem addr conflict, Addr=%08X\n",
3619 __FILE__,__LINE__,info->device_name, info->phys_memory_base);
3620 info->init_error = DiagStatus_AddressConflict;
3621 goto errout;
3622 }
3623 else
3624 info->shared_mem_requested = 1;
3625
3626 if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) {
3627 printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n",
3628 __FILE__,__LINE__,info->device_name, info->phys_lcr_base);
3629 info->init_error = DiagStatus_AddressConflict;
3630 goto errout;
3631 }
3632 else
3633 info->lcr_mem_requested = 1;
3634
3635 if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) {
3636 printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n",
3637 __FILE__,__LINE__,info->device_name, info->phys_sca_base);
3638 info->init_error = DiagStatus_AddressConflict;
3639 goto errout;
3640 }
3641 else
3642 info->sca_base_requested = 1;
3643
3644 if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) {
3645 printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n",
3646 __FILE__,__LINE__,info->device_name, info->phys_statctrl_base);
3647 info->init_error = DiagStatus_AddressConflict;
3648 goto errout;
3649 }
3650 else
3651 info->sca_statctrl_requested = 1;
3652
3653 info->memory_base = ioremap(info->phys_memory_base,SCA_MEM_SIZE);
3654 if (!info->memory_base) {
3655 printk( "%s(%d):%s Cant map shared memory, MemAddr=%08X\n",
3656 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
3657 info->init_error = DiagStatus_CantAssignPciResources;
3658 goto errout;
3659 }
3660
3661 info->lcr_base = ioremap(info->phys_lcr_base,PAGE_SIZE);
3662 if (!info->lcr_base) {
3663 printk( "%s(%d):%s Cant map LCR memory, MemAddr=%08X\n",
3664 __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
3665 info->init_error = DiagStatus_CantAssignPciResources;
3666 goto errout;
3667 }
3668 info->lcr_base += info->lcr_offset;
3669
3670 info->sca_base = ioremap(info->phys_sca_base,PAGE_SIZE);
3671 if (!info->sca_base) {
3672 printk( "%s(%d):%s Cant map SCA memory, MemAddr=%08X\n",
3673 __FILE__,__LINE__,info->device_name, info->phys_sca_base );
3674 info->init_error = DiagStatus_CantAssignPciResources;
3675 goto errout;
3676 }
3677 info->sca_base += info->sca_offset;
3678
3679 info->statctrl_base = ioremap(info->phys_statctrl_base,PAGE_SIZE);
3680 if (!info->statctrl_base) {
3681 printk( "%s(%d):%s Cant map SCA Status/Control memory, MemAddr=%08X\n",
3682 __FILE__,__LINE__,info->device_name, info->phys_statctrl_base );
3683 info->init_error = DiagStatus_CantAssignPciResources;
3684 goto errout;
3685 }
3686 info->statctrl_base += info->statctrl_offset;
3687
3688 if ( !memory_test(info) ) {
3689 printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n",
3690 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
3691 info->init_error = DiagStatus_MemoryError;
3692 goto errout;
3693 }
3694
3695 return 0;
3696
3697 errout:
3698 release_resources( info );
3699 return -ENODEV;
3700 }
3701
3702 void release_resources(SLMP_INFO *info)
3703 {
3704 if ( debug_level >= DEBUG_LEVEL_INFO )
3705 printk( "%s(%d):%s release_resources() entry\n",
3706 __FILE__,__LINE__,info->device_name );
3707
3708 if ( info->irq_requested ) {
3709 free_irq(info->irq_level, info);
3710 info->irq_requested = 0;
3711 }
3712
3713 if ( info->shared_mem_requested ) {
3714 release_mem_region(info->phys_memory_base,SCA_MEM_SIZE);
3715 info->shared_mem_requested = 0;
3716 }
3717 if ( info->lcr_mem_requested ) {
3718 release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
3719 info->lcr_mem_requested = 0;
3720 }
3721 if ( info->sca_base_requested ) {
3722 release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE);
3723 info->sca_base_requested = 0;
3724 }
3725 if ( info->sca_statctrl_requested ) {
3726 release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE);
3727 info->sca_statctrl_requested = 0;
3728 }
3729
3730 if (info->memory_base){
3731 iounmap(info->memory_base);
3732 info->memory_base = NULL;
3733 }
3734
3735 if (info->sca_base) {
3736 iounmap(info->sca_base - info->sca_offset);
3737 info->sca_base=NULL;
3738 }
3739
3740 if (info->statctrl_base) {
3741 iounmap(info->statctrl_base - info->statctrl_offset);
3742 info->statctrl_base=NULL;
3743 }
3744
3745 if (info->lcr_base){
3746 iounmap(info->lcr_base - info->lcr_offset);
3747 info->lcr_base = NULL;
3748 }
3749
3750 if ( debug_level >= DEBUG_LEVEL_INFO )
3751 printk( "%s(%d):%s release_resources() exit\n",
3752 __FILE__,__LINE__,info->device_name );
3753 }
3754
3755 /* Add the specified device instance data structure to the
3756 * global linked list of devices and increment the device count.
3757 */
3758 void add_device(SLMP_INFO *info)
3759 {
3760 info->next_device = NULL;
3761 info->line = synclinkmp_device_count;
3762 sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num);
3763
3764 if (info->line < MAX_DEVICES) {
3765 if (maxframe[info->line])
3766 info->max_frame_size = maxframe[info->line];
3767 info->dosyncppp = dosyncppp[info->line];
3768 }
3769
3770 synclinkmp_device_count++;
3771
3772 if ( !synclinkmp_device_list )
3773 synclinkmp_device_list = info;
3774 else {
3775 SLMP_INFO *current_dev = synclinkmp_device_list;
3776 while( current_dev->next_device )
3777 current_dev = current_dev->next_device;
3778 current_dev->next_device = info;
3779 }
3780
3781 if ( info->max_frame_size < 4096 )
3782 info->max_frame_size = 4096;
3783 else if ( info->max_frame_size > 65535 )
3784 info->max_frame_size = 65535;
3785
3786 printk( "SyncLink MultiPort %s: "
3787 "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n",
3788 info->device_name,
3789 info->phys_sca_base,
3790 info->phys_memory_base,
3791 info->phys_statctrl_base,
3792 info->phys_lcr_base,
3793 info->irq_level,
3794 info->max_frame_size );
3795
3796 #ifdef CONFIG_HDLC
3797 hdlcdev_init(info);
3798 #endif
3799 }
3800
3801 /* Allocate and initialize a device instance structure
3802 *
3803 * Return Value: pointer to SLMP_INFO if success, otherwise NULL
3804 */
3805 static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
3806 {
3807 SLMP_INFO *info;
3808
3809 info = (SLMP_INFO *)kmalloc(sizeof(SLMP_INFO),
3810 GFP_KERNEL);
3811
3812 if (!info) {
3813 printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n",
3814 __FILE__,__LINE__, adapter_num, port_num);
3815 } else {
3816 memset(info, 0, sizeof(SLMP_INFO));
3817 info->magic = MGSL_MAGIC;
3818 INIT_WORK(&info->task, bh_handler, info);
3819 info->max_frame_size = 4096;
3820 info->close_delay = 5*HZ/10;
3821 info->closing_wait = 30*HZ;
3822 init_waitqueue_head(&info->open_wait);
3823 init_waitqueue_head(&info->close_wait);
3824 init_waitqueue_head(&info->status_event_wait_q);
3825 init_waitqueue_head(&info->event_wait_q);
3826 spin_lock_init(&info->netlock);
3827 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
3828 info->idle_mode = HDLC_TXIDLE_FLAGS;
3829 info->adapter_num = adapter_num;
3830 info->port_num = port_num;
3831
3832 /* Copy configuration info to device instance data */
3833 info->irq_level = pdev->irq;
3834 info->phys_lcr_base = pci_resource_start(pdev,0);
3835 info->phys_sca_base = pci_resource_start(pdev,2);
3836 info->phys_memory_base = pci_resource_start(pdev,3);
3837 info->phys_statctrl_base = pci_resource_start(pdev,4);
3838
3839 /* Because veremap only works on page boundaries we must map
3840 * a larger area than is actually implemented for the LCR
3841 * memory range. We map a full page starting at the page boundary.
3842 */
3843 info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
3844 info->phys_lcr_base &= ~(PAGE_SIZE-1);
3845
3846 info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1);
3847 info->phys_sca_base &= ~(PAGE_SIZE-1);
3848
3849 info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1);
3850 info->phys_statctrl_base &= ~(PAGE_SIZE-1);
3851
3852 info->bus_type = MGSL_BUS_TYPE_PCI;
3853 info->irq_flags = SA_SHIRQ;
3854
3855 init_timer(&info->tx_timer);
3856 info->tx_timer.data = (unsigned long)info;
3857 info->tx_timer.function = tx_timeout;
3858
3859 init_timer(&info->status_timer);
3860 info->status_timer.data = (unsigned long)info;
3861 info->status_timer.function = status_timeout;
3862
3863 /* Store the PCI9050 misc control register value because a flaw
3864 * in the PCI9050 prevents LCR registers from being read if
3865 * BIOS assigns an LCR base address with bit 7 set.
3866 *
3867 * Only the misc control register is accessed for which only
3868 * write access is needed, so set an initial value and change
3869 * bits to the device instance data as we write the value
3870 * to the actual misc control register.
3871 */
3872 info->misc_ctrl_value = 0x087e4546;
3873
3874 /* initial port state is unknown - if startup errors
3875 * occur, init_error will be set to indicate the
3876 * problem. Once the port is fully initialized,
3877 * this value will be set to 0 to indicate the
3878 * port is available.
3879 */
3880 info->init_error = -1;
3881 }
3882
3883 return info;
3884 }
3885
3886 void device_init(int adapter_num, struct pci_dev *pdev)
3887 {
3888 SLMP_INFO *port_array[SCA_MAX_PORTS];
3889 int port;
3890
3891 /* allocate device instances for up to SCA_MAX_PORTS devices */
3892 for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
3893 port_array[port] = alloc_dev(adapter_num,port,pdev);
3894 if( port_array[port] == NULL ) {
3895 for ( --port; port >= 0; --port )
3896 kfree(port_array[port]);
3897 return;
3898 }
3899 }
3900
3901 /* give copy of port_array to all ports and add to device list */
3902 for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
3903 memcpy(port_array[port]->port_array,port_array,sizeof(port_array));
3904 add_device( port_array[port] );
3905 spin_lock_init(&port_array[port]->lock);
3906 }
3907
3908 /* Allocate and claim adapter resources */
3909 if ( !claim_resources(port_array[0]) ) {
3910
3911 alloc_dma_bufs(port_array[0]);
3912
3913 /* copy resource information from first port to others */
3914 for ( port = 1; port < SCA_MAX_PORTS; ++port ) {
3915 port_array[port]->lock = port_array[0]->lock;
3916 port_array[port]->irq_level = port_array[0]->irq_level;
3917 port_array[port]->memory_base = port_array[0]->memory_base;
3918 port_array[port]->sca_base = port_array[0]->sca_base;
3919 port_array[port]->statctrl_base = port_array[0]->statctrl_base;
3920 port_array[port]->lcr_base = port_array[0]->lcr_base;
3921 alloc_dma_bufs(port_array[port]);
3922 }
3923
3924 if ( request_irq(port_array[0]->irq_level,
3925 synclinkmp_interrupt,
3926 port_array[0]->irq_flags,
3927 port_array[0]->device_name,
3928 port_array[0]) < 0 ) {
3929 printk( "%s(%d):%s Cant request interrupt, IRQ=%d\n",
3930 __FILE__,__LINE__,
3931 port_array[0]->device_name,
3932 port_array[0]->irq_level );
3933 }
3934 else {
3935 port_array[0]->irq_requested = 1;
3936 adapter_test(port_array[0]);
3937 }
3938 }
3939 }
3940
3941 static struct tty_operations ops = {
3942 .open = open,
3943 .close = close,
3944 .write = write,
3945 .put_char = put_char,
3946 .flush_chars = flush_chars,
3947 .write_room = write_room,
3948 .chars_in_buffer = chars_in_buffer,
3949 .flush_buffer = flush_buffer,
3950 .ioctl = ioctl,
3951 .throttle = throttle,
3952 .unthrottle = unthrottle,
3953 .send_xchar = send_xchar,
3954 .break_ctl = set_break,
3955 .wait_until_sent = wait_until_sent,
3956 .read_proc = read_proc,
3957 .set_termios = set_termios,
3958 .stop = tx_hold,
3959 .start = tx_release,
3960 .hangup = hangup,
3961 .tiocmget = tiocmget,
3962 .tiocmset = tiocmset,
3963 };
3964
3965 static void synclinkmp_cleanup(void)
3966 {
3967 int rc;
3968 SLMP_INFO *info;
3969 SLMP_INFO *tmp;
3970
3971 printk("Unloading %s %s\n", driver_name, driver_version);
3972
3973 if (serial_driver) {
3974 if ((rc = tty_unregister_driver(serial_driver)))
3975 printk("%s(%d) failed to unregister tty driver err=%d\n",
3976 __FILE__,__LINE__,rc);
3977 put_tty_driver(serial_driver);
3978 }
3979
3980 /* reset devices */
3981 info = synclinkmp_device_list;
3982 while(info) {
3983 reset_port(info);
3984 info = info->next_device;
3985 }
3986
3987 /* release devices */
3988 info = synclinkmp_device_list;
3989 while(info) {
3990 #ifdef CONFIG_HDLC
3991 hdlcdev_exit(info);
3992 #endif
3993 free_dma_bufs(info);
3994 free_tmp_rx_buf(info);
3995 if ( info->port_num == 0 ) {
3996 if (info->sca_base)
3997 write_reg(info, LPR, 1); /* set low power mode */
3998 release_resources(info);
3999 }
4000 tmp = info;
4001 info = info->next_device;
4002 kfree(tmp);
4003 }
4004
4005 pci_unregister_driver(&synclinkmp_pci_driver);
4006 }
4007
4008 /* Driver initialization entry point.
4009 */
4010
4011 static int __init synclinkmp_init(void)
4012 {
4013 int rc;
4014
4015 if (break_on_load) {
4016 synclinkmp_get_text_ptr();
4017 BREAKPOINT();
4018 }
4019
4020 printk("%s %s\n", driver_name, driver_version);
4021
4022 if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) {
4023 printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
4024 return rc;
4025 }
4026
4027 serial_driver = alloc_tty_driver(128);
4028 if (!serial_driver) {
4029 rc = -ENOMEM;
4030 goto error;
4031 }
4032
4033 /* Initialize the tty_driver structure */
4034
4035 serial_driver->owner = THIS_MODULE;
4036 serial_driver->driver_name = "synclinkmp";
4037 serial_driver->name = "ttySLM";
4038 serial_driver->major = ttymajor;
4039 serial_driver->minor_start = 64;
4040 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4041 serial_driver->subtype = SERIAL_TYPE_NORMAL;
4042 serial_driver->init_termios = tty_std_termios;
4043 serial_driver->init_termios.c_cflag =
4044 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4045 serial_driver->flags = TTY_DRIVER_REAL_RAW;
4046 tty_set_operations(serial_driver, &ops);
4047 if ((rc = tty_register_driver(serial_driver)) < 0) {
4048 printk("%s(%d):Couldn't register serial driver\n",
4049 __FILE__,__LINE__);
4050 put_tty_driver(serial_driver);
4051 serial_driver = NULL;
4052 goto error;
4053 }
4054
4055 printk("%s %s, tty major#%d\n",
4056 driver_name, driver_version,
4057 serial_driver->major);
4058
4059 return 0;
4060
4061 error:
4062 synclinkmp_cleanup();
4063 return rc;
4064 }
4065
4066 static void __exit synclinkmp_exit(void)
4067 {
4068 synclinkmp_cleanup();
4069 }
4070
4071 module_init(synclinkmp_init);
4072 module_exit(synclinkmp_exit);
4073
4074 /* Set the port for internal loopback mode.
4075 * The TxCLK and RxCLK signals are generated from the BRG and
4076 * the TxD is looped back to the RxD internally.
4077 */
4078 void enable_loopback(SLMP_INFO *info, int enable)
4079 {
4080 if (enable) {
4081 /* MD2 (Mode Register 2)
4082 * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback
4083 */
4084 write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0)));
4085
4086 /* degate external TxC clock source */
4087 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4088 write_control_reg(info);
4089
4090 /* RXS/TXS (Rx/Tx clock source)
4091 * 07 Reserved, must be 0
4092 * 06..04 Clock Source, 100=BRG
4093 * 03..00 Clock Divisor, 0000=1
4094 */
4095 write_reg(info, RXS, 0x40);
4096 write_reg(info, TXS, 0x40);
4097
4098 } else {
4099 /* MD2 (Mode Register 2)
4100 * 01..00 CNCT<1..0> Channel connection, 0=normal
4101 */
4102 write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0)));
4103
4104 /* RXS/TXS (Rx/Tx clock source)
4105 * 07 Reserved, must be 0
4106 * 06..04 Clock Source, 000=RxC/TxC Pin
4107 * 03..00 Clock Divisor, 0000=1
4108 */
4109 write_reg(info, RXS, 0x00);
4110 write_reg(info, TXS, 0x00);
4111 }
4112
4113 /* set LinkSpeed if available, otherwise default to 2Mbps */
4114 if (info->params.clock_speed)
4115 set_rate(info, info->params.clock_speed);
4116 else
4117 set_rate(info, 3686400);
4118 }
4119
4120 /* Set the baud rate register to the desired speed
4121 *
4122 * data_rate data rate of clock in bits per second
4123 * A data rate of 0 disables the AUX clock.
4124 */
4125 void set_rate( SLMP_INFO *info, u32 data_rate )
4126 {
4127 u32 TMCValue;
4128 unsigned char BRValue;
4129 u32 Divisor=0;
4130
4131 /* fBRG = fCLK/(TMC * 2^BR)
4132 */
4133 if (data_rate != 0) {
4134 Divisor = 14745600/data_rate;
4135 if (!Divisor)
4136 Divisor = 1;
4137
4138 TMCValue = Divisor;
4139
4140 BRValue = 0;
4141 if (TMCValue != 1 && TMCValue != 2) {
4142 /* BRValue of 0 provides 50/50 duty cycle *only* when
4143 * TMCValue is 1 or 2. BRValue of 1 to 9 always provides
4144 * 50/50 duty cycle.
4145 */
4146 BRValue = 1;
4147 TMCValue >>= 1;
4148 }
4149
4150 /* while TMCValue is too big for TMC register, divide
4151 * by 2 and increment BR exponent.
4152 */
4153 for(; TMCValue > 256 && BRValue < 10; BRValue++)
4154 TMCValue >>= 1;
4155
4156 write_reg(info, TXS,
4157 (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue));
4158 write_reg(info, RXS,
4159 (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue));
4160 write_reg(info, TMC, (unsigned char)TMCValue);
4161 }
4162 else {
4163 write_reg(info, TXS,0);
4164 write_reg(info, RXS,0);
4165 write_reg(info, TMC, 0);
4166 }
4167 }
4168
4169 /* Disable receiver
4170 */
4171 void rx_stop(SLMP_INFO *info)
4172 {
4173 if (debug_level >= DEBUG_LEVEL_ISR)
4174 printk("%s(%d):%s rx_stop()\n",
4175 __FILE__,__LINE__, info->device_name );
4176
4177 write_reg(info, CMD, RXRESET);
4178
4179 info->ie0_value &= ~RXRDYE;
4180 write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */
4181
4182 write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
4183 write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
4184 write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */
4185
4186 info->rx_enabled = 0;
4187 info->rx_overflow = 0;
4188 }
4189
4190 /* enable the receiver
4191 */
4192 void rx_start(SLMP_INFO *info)
4193 {
4194 int i;
4195
4196 if (debug_level >= DEBUG_LEVEL_ISR)
4197 printk("%s(%d):%s rx_start()\n",
4198 __FILE__,__LINE__, info->device_name );
4199
4200 write_reg(info, CMD, RXRESET);
4201
4202 if ( info->params.mode == MGSL_MODE_HDLC ) {
4203 /* HDLC, disabe IRQ on rxdata */
4204 info->ie0_value &= ~RXRDYE;
4205 write_reg(info, IE0, info->ie0_value);
4206
4207 /* Reset all Rx DMA buffers and program rx dma */
4208 write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
4209 write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
4210
4211 for (i = 0; i < info->rx_buf_count; i++) {
4212 info->rx_buf_list[i].status = 0xff;
4213
4214 // throttle to 4 shared memory writes at a time to prevent
4215 // hogging local bus (keep latency time for DMA requests low).
4216 if (!(i % 4))
4217 read_status_reg(info);
4218 }
4219 info->current_rx_buf = 0;
4220
4221 /* set current/1st descriptor address */
4222 write_reg16(info, RXDMA + CDA,
4223 info->rx_buf_list_ex[0].phys_entry);
4224
4225 /* set new last rx descriptor address */
4226 write_reg16(info, RXDMA + EDA,
4227 info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry);
4228
4229 /* set buffer length (shared by all rx dma data buffers) */
4230 write_reg16(info, RXDMA + BFL, SCABUFSIZE);
4231
4232 write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */
4233 write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */
4234 } else {
4235 /* async, enable IRQ on rxdata */
4236 info->ie0_value |= RXRDYE;
4237 write_reg(info, IE0, info->ie0_value);
4238 }
4239
4240 write_reg(info, CMD, RXENABLE);
4241
4242 info->rx_overflow = FALSE;
4243 info->rx_enabled = 1;
4244 }
4245
4246 /* Enable the transmitter and send a transmit frame if
4247 * one is loaded in the DMA buffers.
4248 */
4249 void tx_start(SLMP_INFO *info)
4250 {
4251 if (debug_level >= DEBUG_LEVEL_ISR)
4252 printk("%s(%d):%s tx_start() tx_count=%d\n",
4253 __FILE__,__LINE__, info->device_name,info->tx_count );
4254
4255 if (!info->tx_enabled ) {
4256 write_reg(info, CMD, TXRESET);
4257 write_reg(info, CMD, TXENABLE);
4258 info->tx_enabled = TRUE;
4259 }
4260
4261 if ( info->tx_count ) {
4262
4263 /* If auto RTS enabled and RTS is inactive, then assert */
4264 /* RTS and set a flag indicating that the driver should */
4265 /* negate RTS when the transmission completes. */
4266
4267 info->drop_rts_on_tx_done = 0;
4268
4269 if (info->params.mode != MGSL_MODE_ASYNC) {
4270
4271 if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
4272 get_signals( info );
4273 if ( !(info->serial_signals & SerialSignal_RTS) ) {
4274 info->serial_signals |= SerialSignal_RTS;
4275 set_signals( info );
4276 info->drop_rts_on_tx_done = 1;
4277 }
4278 }
4279
4280 write_reg16(info, TRC0,
4281 (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level));
4282
4283 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
4284 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
4285
4286 /* set TX CDA (current descriptor address) */
4287 write_reg16(info, TXDMA + CDA,
4288 info->tx_buf_list_ex[0].phys_entry);
4289
4290 /* set TX EDA (last descriptor address) */
4291 write_reg16(info, TXDMA + EDA,
4292 info->tx_buf_list_ex[info->last_tx_buf].phys_entry);
4293
4294 /* enable underrun IRQ */
4295 info->ie1_value &= ~IDLE;
4296 info->ie1_value |= UDRN;
4297 write_reg(info, IE1, info->ie1_value);
4298 write_reg(info, SR1, (unsigned char)(IDLE + UDRN));
4299
4300 write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */
4301 write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */
4302
4303 info->tx_timer.expires = jiffies + msecs_to_jiffies(5000);
4304 add_timer(&info->tx_timer);
4305 }
4306 else {
4307 tx_load_fifo(info);
4308 /* async, enable IRQ on txdata */
4309 info->ie0_value |= TXRDYE;
4310 write_reg(info, IE0, info->ie0_value);
4311 }
4312
4313 info->tx_active = 1;
4314 }
4315 }
4316
4317 /* stop the transmitter and DMA
4318 */
4319 void tx_stop( SLMP_INFO *info )
4320 {
4321 if (debug_level >= DEBUG_LEVEL_ISR)
4322 printk("%s(%d):%s tx_stop()\n",
4323 __FILE__,__LINE__, info->device_name );
4324
4325 del_timer(&info->tx_timer);
4326
4327 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
4328 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
4329
4330 write_reg(info, CMD, TXRESET);
4331
4332 info->ie1_value &= ~(UDRN + IDLE);
4333 write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
4334 write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
4335
4336 info->ie0_value &= ~TXRDYE;
4337 write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */
4338
4339 info->tx_enabled = 0;
4340 info->tx_active = 0;
4341 }
4342
4343 /* Fill the transmit FIFO until the FIFO is full or
4344 * there is no more data to load.
4345 */
4346 void tx_load_fifo(SLMP_INFO *info)
4347 {
4348 u8 TwoBytes[2];
4349
4350 /* do nothing is now tx data available and no XON/XOFF pending */
4351
4352 if ( !info->tx_count && !info->x_char )
4353 return;
4354
4355 /* load the Transmit FIFO until FIFOs full or all data sent */
4356
4357 while( info->tx_count && (read_reg(info,SR0) & BIT1) ) {
4358
4359 /* there is more space in the transmit FIFO and */
4360 /* there is more data in transmit buffer */
4361
4362 if ( (info->tx_count > 1) && !info->x_char ) {
4363 /* write 16-bits */
4364 TwoBytes[0] = info->tx_buf[info->tx_get++];
4365 if (info->tx_get >= info->max_frame_size)
4366 info->tx_get -= info->max_frame_size;
4367 TwoBytes[1] = info->tx_buf[info->tx_get++];
4368 if (info->tx_get >= info->max_frame_size)
4369 info->tx_get -= info->max_frame_size;
4370
4371 write_reg16(info, TRB, *((u16 *)TwoBytes));
4372
4373 info->tx_count -= 2;
4374 info->icount.tx += 2;
4375 } else {
4376 /* only 1 byte left to transmit or 1 FIFO slot left */
4377
4378 if (info->x_char) {
4379 /* transmit pending high priority char */
4380 write_reg(info, TRB, info->x_char);
4381 info->x_char = 0;
4382 } else {
4383 write_reg(info, TRB, info->tx_buf[info->tx_get++]);
4384 if (info->tx_get >= info->max_frame_size)
4385 info->tx_get -= info->max_frame_size;
4386 info->tx_count--;
4387 }
4388 info->icount.tx++;
4389 }
4390 }
4391 }
4392
4393 /* Reset a port to a known state
4394 */
4395 void reset_port(SLMP_INFO *info)
4396 {
4397 if (info->sca_base) {
4398
4399 tx_stop(info);
4400 rx_stop(info);
4401
4402 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
4403 set_signals(info);
4404
4405 /* disable all port interrupts */
4406 info->ie0_value = 0;
4407 info->ie1_value = 0;
4408 info->ie2_value = 0;
4409 write_reg(info, IE0, info->ie0_value);
4410 write_reg(info, IE1, info->ie1_value);
4411 write_reg(info, IE2, info->ie2_value);
4412
4413 write_reg(info, CMD, CHRESET);
4414 }
4415 }
4416
4417 /* Reset all the ports to a known state.
4418 */
4419 void reset_adapter(SLMP_INFO *info)
4420 {
4421 int i;
4422
4423 for ( i=0; i < SCA_MAX_PORTS; ++i) {
4424 if (info->port_array[i])
4425 reset_port(info->port_array[i]);
4426 }
4427 }
4428
4429 /* Program port for asynchronous communications.
4430 */
4431 void async_mode(SLMP_INFO *info)
4432 {
4433
4434 unsigned char RegValue;
4435
4436 tx_stop(info);
4437 rx_stop(info);
4438
4439 /* MD0, Mode Register 0
4440 *
4441 * 07..05 PRCTL<2..0>, Protocol Mode, 000=async
4442 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4443 * 03 Reserved, must be 0
4444 * 02 CRCCC, CRC Calculation, 0=disabled
4445 * 01..00 STOP<1..0> Stop bits (00=1,10=2)
4446 *
4447 * 0000 0000
4448 */
4449 RegValue = 0x00;
4450 if (info->params.stop_bits != 1)
4451 RegValue |= BIT1;
4452 write_reg(info, MD0, RegValue);
4453
4454 /* MD1, Mode Register 1
4455 *
4456 * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64
4457 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5
4458 * 03..02 RXCHR<1..0>, rx char size
4459 * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd
4460 *
4461 * 0100 0000
4462 */
4463 RegValue = 0x40;
4464 switch (info->params.data_bits) {
4465 case 7: RegValue |= BIT4 + BIT2; break;
4466 case 6: RegValue |= BIT5 + BIT3; break;
4467 case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break;
4468 }
4469 if (info->params.parity != ASYNC_PARITY_NONE) {
4470 RegValue |= BIT1;
4471 if (info->params.parity == ASYNC_PARITY_ODD)
4472 RegValue |= BIT0;
4473 }
4474 write_reg(info, MD1, RegValue);
4475
4476 /* MD2, Mode Register 2
4477 *
4478 * 07..02 Reserved, must be 0
4479 * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback
4480 *
4481 * 0000 0000
4482 */
4483 RegValue = 0x00;
4484 if (info->params.loopback)
4485 RegValue |= (BIT1 + BIT0);
4486 write_reg(info, MD2, RegValue);
4487
4488 /* RXS, Receive clock source
4489 *
4490 * 07 Reserved, must be 0
4491 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4492 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4493 */
4494 RegValue=BIT6;
4495 write_reg(info, RXS, RegValue);
4496
4497 /* TXS, Transmit clock source
4498 *
4499 * 07 Reserved, must be 0
4500 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4501 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4502 */
4503 RegValue=BIT6;
4504 write_reg(info, TXS, RegValue);
4505
4506 /* Control Register
4507 *
4508 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4509 */
4510 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4511 write_control_reg(info);
4512
4513 tx_set_idle(info);
4514
4515 /* RRC Receive Ready Control 0
4516 *
4517 * 07..05 Reserved, must be 0
4518 * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte
4519 */
4520 write_reg(info, RRC, 0x00);
4521
4522 /* TRC0 Transmit Ready Control 0
4523 *
4524 * 07..05 Reserved, must be 0
4525 * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes
4526 */
4527 write_reg(info, TRC0, 0x10);
4528
4529 /* TRC1 Transmit Ready Control 1
4530 *
4531 * 07..05 Reserved, must be 0
4532 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1)
4533 */
4534 write_reg(info, TRC1, 0x1e);
4535
4536 /* CTL, MSCI control register
4537 *
4538 * 07..06 Reserved, set to 0
4539 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4540 * 04 IDLC, idle control, 0=mark 1=idle register
4541 * 03 BRK, break, 0=off 1 =on (async)
4542 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4543 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4544 * 00 RTS, RTS output control, 0=active 1=inactive
4545 *
4546 * 0001 0001
4547 */
4548 RegValue = 0x10;
4549 if (!(info->serial_signals & SerialSignal_RTS))
4550 RegValue |= 0x01;
4551 write_reg(info, CTL, RegValue);
4552
4553 /* enable status interrupts */
4554 info->ie0_value |= TXINTE + RXINTE;
4555 write_reg(info, IE0, info->ie0_value);
4556
4557 /* enable break detect interrupt */
4558 info->ie1_value = BRKD;
4559 write_reg(info, IE1, info->ie1_value);
4560
4561 /* enable rx overrun interrupt */
4562 info->ie2_value = OVRN;
4563 write_reg(info, IE2, info->ie2_value);
4564
4565 set_rate( info, info->params.data_rate * 16 );
4566 }
4567
4568 /* Program the SCA for HDLC communications.
4569 */
4570 void hdlc_mode(SLMP_INFO *info)
4571 {
4572 unsigned char RegValue;
4573 u32 DpllDivisor;
4574
4575 // Can't use DPLL because SCA outputs recovered clock on RxC when
4576 // DPLL mode selected. This causes output contention with RxC receiver.
4577 // Use of DPLL would require external hardware to disable RxC receiver
4578 // when DPLL mode selected.
4579 info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL);
4580
4581 /* disable DMA interrupts */
4582 write_reg(info, TXDMA + DIR, 0);
4583 write_reg(info, RXDMA + DIR, 0);
4584
4585 /* MD0, Mode Register 0
4586 *
4587 * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC
4588 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4589 * 03 Reserved, must be 0
4590 * 02 CRCCC, CRC Calculation, 1=enabled
4591 * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16
4592 * 00 CRC0, CRC initial value, 1 = all 1s
4593 *
4594 * 1000 0001
4595 */
4596 RegValue = 0x81;
4597 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
4598 RegValue |= BIT4;
4599 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
4600 RegValue |= BIT4;
4601 if (info->params.crc_type == HDLC_CRC_16_CCITT)
4602 RegValue |= BIT2 + BIT1;
4603 write_reg(info, MD0, RegValue);
4604
4605 /* MD1, Mode Register 1
4606 *
4607 * 07..06 ADDRS<1..0>, Address detect, 00=no addr check
4608 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits
4609 * 03..02 RXCHR<1..0>, rx char size, 00=8 bits
4610 * 01..00 PMPM<1..0>, Parity mode, 00=no parity
4611 *
4612 * 0000 0000
4613 */
4614 RegValue = 0x00;
4615 write_reg(info, MD1, RegValue);
4616
4617 /* MD2, Mode Register 2
4618 *
4619 * 07 NRZFM, 0=NRZ, 1=FM
4620 * 06..05 CODE<1..0> Encoding, 00=NRZ
4621 * 04..03 DRATE<1..0> DPLL Divisor, 00=8
4622 * 02 Reserved, must be 0
4623 * 01..00 CNCT<1..0> Channel connection, 0=normal
4624 *
4625 * 0000 0000
4626 */
4627 RegValue = 0x00;
4628 switch(info->params.encoding) {
4629 case HDLC_ENCODING_NRZI: RegValue |= BIT5; break;
4630 case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */
4631 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */
4632 case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */
4633 #if 0
4634 case HDLC_ENCODING_NRZB: /* not supported */
4635 case HDLC_ENCODING_NRZI_MARK: /* not supported */
4636 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */
4637 #endif
4638 }
4639 if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
4640 DpllDivisor = 16;
4641 RegValue |= BIT3;
4642 } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
4643 DpllDivisor = 8;
4644 } else {
4645 DpllDivisor = 32;
4646 RegValue |= BIT4;
4647 }
4648 write_reg(info, MD2, RegValue);
4649
4650
4651 /* RXS, Receive clock source
4652 *
4653 * 07 Reserved, must be 0
4654 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4655 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4656 */
4657 RegValue=0;
4658 if (info->params.flags & HDLC_FLAG_RXC_BRG)
4659 RegValue |= BIT6;
4660 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
4661 RegValue |= BIT6 + BIT5;
4662 write_reg(info, RXS, RegValue);
4663
4664 /* TXS, Transmit clock source
4665 *
4666 * 07 Reserved, must be 0
4667 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4668 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4669 */
4670 RegValue=0;
4671 if (info->params.flags & HDLC_FLAG_TXC_BRG)
4672 RegValue |= BIT6;
4673 if (info->params.flags & HDLC_FLAG_TXC_DPLL)
4674 RegValue |= BIT6 + BIT5;
4675 write_reg(info, TXS, RegValue);
4676
4677 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
4678 set_rate(info, info->params.clock_speed * DpllDivisor);
4679 else
4680 set_rate(info, info->params.clock_speed);
4681
4682 /* GPDATA (General Purpose I/O Data Register)
4683 *
4684 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4685 */
4686 if (info->params.flags & HDLC_FLAG_TXC_BRG)
4687 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4688 else
4689 info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2));
4690 write_control_reg(info);
4691
4692 /* RRC Receive Ready Control 0
4693 *
4694 * 07..05 Reserved, must be 0
4695 * 04..00 RRC<4..0> Rx FIFO trigger active
4696 */
4697 write_reg(info, RRC, rx_active_fifo_level);
4698
4699 /* TRC0 Transmit Ready Control 0
4700 *
4701 * 07..05 Reserved, must be 0
4702 * 04..00 TRC<4..0> Tx FIFO trigger active
4703 */
4704 write_reg(info, TRC0, tx_active_fifo_level);
4705
4706 /* TRC1 Transmit Ready Control 1
4707 *
4708 * 07..05 Reserved, must be 0
4709 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full)
4710 */
4711 write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1));
4712
4713 /* DMR, DMA Mode Register
4714 *
4715 * 07..05 Reserved, must be 0
4716 * 04 TMOD, Transfer Mode: 1=chained-block
4717 * 03 Reserved, must be 0
4718 * 02 NF, Number of Frames: 1=multi-frame
4719 * 01 CNTE, Frame End IRQ Counter enable: 0=disabled
4720 * 00 Reserved, must be 0
4721 *
4722 * 0001 0100
4723 */
4724 write_reg(info, TXDMA + DMR, 0x14);
4725 write_reg(info, RXDMA + DMR, 0x14);
4726
4727 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4728 write_reg(info, RXDMA + CPB,
4729 (unsigned char)(info->buffer_list_phys >> 16));
4730
4731 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4732 write_reg(info, TXDMA + CPB,
4733 (unsigned char)(info->buffer_list_phys >> 16));
4734
4735 /* enable status interrupts. other code enables/disables
4736 * the individual sources for these two interrupt classes.
4737 */
4738 info->ie0_value |= TXINTE + RXINTE;
4739 write_reg(info, IE0, info->ie0_value);
4740
4741 /* CTL, MSCI control register
4742 *
4743 * 07..06 Reserved, set to 0
4744 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4745 * 04 IDLC, idle control, 0=mark 1=idle register
4746 * 03 BRK, break, 0=off 1 =on (async)
4747 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4748 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4749 * 00 RTS, RTS output control, 0=active 1=inactive
4750 *
4751 * 0001 0001
4752 */
4753 RegValue = 0x10;
4754 if (!(info->serial_signals & SerialSignal_RTS))
4755 RegValue |= 0x01;
4756 write_reg(info, CTL, RegValue);
4757
4758 /* preamble not supported ! */
4759
4760 tx_set_idle(info);
4761 tx_stop(info);
4762 rx_stop(info);
4763
4764 set_rate(info, info->params.clock_speed);
4765
4766 if (info->params.loopback)
4767 enable_loopback(info,1);
4768 }
4769
4770 /* Set the transmit HDLC idle mode
4771 */
4772 void tx_set_idle(SLMP_INFO *info)
4773 {
4774 unsigned char RegValue = 0xff;
4775
4776 /* Map API idle mode to SCA register bits */
4777 switch(info->idle_mode) {
4778 case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break;
4779 case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break;
4780 case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break;
4781 case HDLC_TXIDLE_ONES: RegValue = 0xff; break;
4782 case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break;
4783 case HDLC_TXIDLE_SPACE: RegValue = 0x00; break;
4784 case HDLC_TXIDLE_MARK: RegValue = 0xff; break;
4785 }
4786
4787 write_reg(info, IDL, RegValue);
4788 }
4789
4790 /* Query the adapter for the state of the V24 status (input) signals.
4791 */
4792 void get_signals(SLMP_INFO *info)
4793 {
4794 u16 status = read_reg(info, SR3);
4795 u16 gpstatus = read_status_reg(info);
4796 u16 testbit;
4797
4798 /* clear all serial signals except DTR and RTS */
4799 info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
4800
4801 /* set serial signal bits to reflect MISR */
4802
4803 if (!(status & BIT3))
4804 info->serial_signals |= SerialSignal_CTS;
4805
4806 if ( !(status & BIT2))
4807 info->serial_signals |= SerialSignal_DCD;
4808
4809 testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7>
4810 if (!(gpstatus & testbit))
4811 info->serial_signals |= SerialSignal_RI;
4812
4813 testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6>
4814 if (!(gpstatus & testbit))
4815 info->serial_signals |= SerialSignal_DSR;
4816 }
4817
4818 /* Set the state of DTR and RTS based on contents of
4819 * serial_signals member of device context.
4820 */
4821 void set_signals(SLMP_INFO *info)
4822 {
4823 unsigned char RegValue;
4824 u16 EnableBit;
4825
4826 RegValue = read_reg(info, CTL);
4827 if (info->serial_signals & SerialSignal_RTS)
4828 RegValue &= ~BIT0;
4829 else
4830 RegValue |= BIT0;
4831 write_reg(info, CTL, RegValue);
4832
4833 // Port 0..3 DTR is ctrl reg <1,3,5,7>
4834 EnableBit = BIT1 << (info->port_num*2);
4835 if (info->serial_signals & SerialSignal_DTR)
4836 info->port_array[0]->ctrlreg_value &= ~EnableBit;
4837 else
4838 info->port_array[0]->ctrlreg_value |= EnableBit;
4839 write_control_reg(info);
4840 }
4841
4842 /*******************/
4843 /* DMA Buffer Code */
4844 /*******************/
4845
4846 /* Set the count for all receive buffers to SCABUFSIZE
4847 * and set the current buffer to the first buffer. This effectively
4848 * makes all buffers free and discards any data in buffers.
4849 */
4850 void rx_reset_buffers(SLMP_INFO *info)
4851 {
4852 rx_free_frame_buffers(info, 0, info->rx_buf_count - 1);
4853 }
4854
4855 /* Free the buffers used by a received frame
4856 *
4857 * info pointer to device instance data
4858 * first index of 1st receive buffer of frame
4859 * last index of last receive buffer of frame
4860 */
4861 void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last)
4862 {
4863 int done = 0;
4864
4865 while(!done) {
4866 /* reset current buffer for reuse */
4867 info->rx_buf_list[first].status = 0xff;
4868
4869 if (first == last) {
4870 done = 1;
4871 /* set new last rx descriptor address */
4872 write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry);
4873 }
4874
4875 first++;
4876 if (first == info->rx_buf_count)
4877 first = 0;
4878 }
4879
4880 /* set current buffer to next buffer after last buffer of frame */
4881 info->current_rx_buf = first;
4882 }
4883
4884 /* Return a received frame from the receive DMA buffers.
4885 * Only frames received without errors are returned.
4886 *
4887 * Return Value: 1 if frame returned, otherwise 0
4888 */
4889 int rx_get_frame(SLMP_INFO *info)
4890 {
4891 unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
4892 unsigned short status;
4893 unsigned int framesize = 0;
4894 int ReturnCode = 0;
4895 unsigned long flags;
4896 struct tty_struct *tty = info->tty;
4897 unsigned char addr_field = 0xff;
4898 SCADESC *desc;
4899 SCADESC_EX *desc_ex;
4900
4901 CheckAgain:
4902 /* assume no frame returned, set zero length */
4903 framesize = 0;
4904 addr_field = 0xff;
4905
4906 /*
4907 * current_rx_buf points to the 1st buffer of the next available
4908 * receive frame. To find the last buffer of the frame look for
4909 * a non-zero status field in the buffer entries. (The status
4910 * field is set by the 16C32 after completing a receive frame.
4911 */
4912 StartIndex = EndIndex = info->current_rx_buf;
4913
4914 for ( ;; ) {
4915 desc = &info->rx_buf_list[EndIndex];
4916 desc_ex = &info->rx_buf_list_ex[EndIndex];
4917
4918 if (desc->status == 0xff)
4919 goto Cleanup; /* current desc still in use, no frames available */
4920
4921 if (framesize == 0 && info->params.addr_filter != 0xff)
4922 addr_field = desc_ex->virt_addr[0];
4923
4924 framesize += desc->length;
4925
4926 /* Status != 0 means last buffer of frame */
4927 if (desc->status)
4928 break;
4929
4930 EndIndex++;
4931 if (EndIndex == info->rx_buf_count)
4932 EndIndex = 0;
4933
4934 if (EndIndex == info->current_rx_buf) {
4935 /* all buffers have been 'used' but none mark */
4936 /* the end of a frame. Reset buffers and receiver. */
4937 if ( info->rx_enabled ){
4938 spin_lock_irqsave(&info->lock,flags);
4939 rx_start(info);
4940 spin_unlock_irqrestore(&info->lock,flags);
4941 }
4942 goto Cleanup;
4943 }
4944
4945 }
4946
4947 /* check status of receive frame */
4948
4949 /* frame status is byte stored after frame data
4950 *
4951 * 7 EOM (end of msg), 1 = last buffer of frame
4952 * 6 Short Frame, 1 = short frame
4953 * 5 Abort, 1 = frame aborted
4954 * 4 Residue, 1 = last byte is partial
4955 * 3 Overrun, 1 = overrun occurred during frame reception
4956 * 2 CRC, 1 = CRC error detected
4957 *
4958 */
4959 status = desc->status;
4960
4961 /* ignore CRC bit if not using CRC (bit is undefined) */
4962 /* Note:CRC is not save to data buffer */
4963 if (info->params.crc_type == HDLC_CRC_NONE)
4964 status &= ~BIT2;
4965
4966 if (framesize == 0 ||
4967 (addr_field != 0xff && addr_field != info->params.addr_filter)) {
4968 /* discard 0 byte frames, this seems to occur sometime
4969 * when remote is idling flags.
4970 */
4971 rx_free_frame_buffers(info, StartIndex, EndIndex);
4972 goto CheckAgain;
4973 }
4974
4975 if (framesize < 2)
4976 status |= BIT6;
4977
4978 if (status & (BIT6+BIT5+BIT3+BIT2)) {
4979 /* received frame has errors,
4980 * update counts and mark frame size as 0
4981 */
4982 if (status & BIT6)
4983 info->icount.rxshort++;
4984 else if (status & BIT5)
4985 info->icount.rxabort++;
4986 else if (status & BIT3)
4987 info->icount.rxover++;
4988 else
4989 info->icount.rxcrc++;
4990
4991 framesize = 0;
4992 #ifdef CONFIG_HDLC
4993 {
4994 struct net_device_stats *stats = hdlc_stats(info->netdev);
4995 stats->rx_errors++;
4996 stats->rx_frame_errors++;
4997 }
4998 #endif
4999 }
5000
5001 if ( debug_level >= DEBUG_LEVEL_BH )
5002 printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n",
5003 __FILE__,__LINE__,info->device_name,status,framesize);
5004
5005 if ( debug_level >= DEBUG_LEVEL_DATA )
5006 trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr,
5007 min_t(int, framesize,SCABUFSIZE),0);
5008
5009 if (framesize) {
5010 if (framesize > info->max_frame_size)
5011 info->icount.rxlong++;
5012 else {
5013 /* copy dma buffer(s) to contiguous intermediate buffer */
5014 int copy_count = framesize;
5015 int index = StartIndex;
5016 unsigned char *ptmp = info->tmp_rx_buf;
5017 info->tmp_rx_buf_count = framesize;
5018
5019 info->icount.rxok++;
5020
5021 while(copy_count) {
5022 int partial_count = min(copy_count,SCABUFSIZE);
5023 memcpy( ptmp,
5024 info->rx_buf_list_ex[index].virt_addr,
5025 partial_count );
5026 ptmp += partial_count;
5027 copy_count -= partial_count;
5028
5029 if ( ++index == info->rx_buf_count )
5030 index = 0;
5031 }
5032
5033 #ifdef CONFIG_HDLC
5034 if (info->netcount)
5035 hdlcdev_rx(info,info->tmp_rx_buf,framesize);
5036 else
5037 #endif
5038 ldisc_receive_buf(tty,info->tmp_rx_buf,
5039 info->flag_buf, framesize);
5040 }
5041 }
5042 /* Free the buffers used by this frame. */
5043 rx_free_frame_buffers( info, StartIndex, EndIndex );
5044
5045 ReturnCode = 1;
5046
5047 Cleanup:
5048 if ( info->rx_enabled && info->rx_overflow ) {
5049 /* Receiver is enabled, but needs to restarted due to
5050 * rx buffer overflow. If buffers are empty, restart receiver.
5051 */
5052 if (info->rx_buf_list[EndIndex].status == 0xff) {
5053 spin_lock_irqsave(&info->lock,flags);
5054 rx_start(info);
5055 spin_unlock_irqrestore(&info->lock,flags);
5056 }
5057 }
5058
5059 return ReturnCode;
5060 }
5061
5062 /* load the transmit DMA buffer with data
5063 */
5064 void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count)
5065 {
5066 unsigned short copy_count;
5067 unsigned int i = 0;
5068 SCADESC *desc;
5069 SCADESC_EX *desc_ex;
5070
5071 if ( debug_level >= DEBUG_LEVEL_DATA )
5072 trace_block(info,buf, min_t(int, count,SCABUFSIZE), 1);
5073
5074 /* Copy source buffer to one or more DMA buffers, starting with
5075 * the first transmit dma buffer.
5076 */
5077 for(i=0;;)
5078 {
5079 copy_count = min_t(unsigned short,count,SCABUFSIZE);
5080
5081 desc = &info->tx_buf_list[i];
5082 desc_ex = &info->tx_buf_list_ex[i];
5083
5084 load_pci_memory(info, desc_ex->virt_addr,buf,copy_count);
5085
5086 desc->length = copy_count;
5087 desc->status = 0;
5088
5089 buf += copy_count;
5090 count -= copy_count;
5091
5092 if (!count)
5093 break;
5094
5095 i++;
5096 if (i >= info->tx_buf_count)
5097 i = 0;
5098 }
5099
5100 info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */
5101 info->last_tx_buf = ++i;
5102 }
5103
5104 int register_test(SLMP_INFO *info)
5105 {
5106 static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96};
5107 static unsigned int count = ARRAY_SIZE(testval);
5108 unsigned int i;
5109 int rc = TRUE;
5110 unsigned long flags;
5111
5112 spin_lock_irqsave(&info->lock,flags);
5113 reset_port(info);
5114
5115 /* assume failure */
5116 info->init_error = DiagStatus_AddressFailure;
5117
5118 /* Write bit patterns to various registers but do it out of */
5119 /* sync, then read back and verify values. */
5120
5121 for (i = 0 ; i < count ; i++) {
5122 write_reg(info, TMC, testval[i]);
5123 write_reg(info, IDL, testval[(i+1)%count]);
5124 write_reg(info, SA0, testval[(i+2)%count]);
5125 write_reg(info, SA1, testval[(i+3)%count]);
5126
5127 if ( (read_reg(info, TMC) != testval[i]) ||
5128 (read_reg(info, IDL) != testval[(i+1)%count]) ||
5129 (read_reg(info, SA0) != testval[(i+2)%count]) ||
5130 (read_reg(info, SA1) != testval[(i+3)%count]) )
5131 {
5132 rc = FALSE;
5133 break;
5134 }
5135 }
5136
5137 reset_port(info);
5138 spin_unlock_irqrestore(&info->lock,flags);
5139
5140 return rc;
5141 }
5142
5143 int irq_test(SLMP_INFO *info)
5144 {
5145 unsigned long timeout;
5146 unsigned long flags;
5147
5148 unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
5149
5150 spin_lock_irqsave(&info->lock,flags);
5151 reset_port(info);
5152
5153 /* assume failure */
5154 info->init_error = DiagStatus_IrqFailure;
5155 info->irq_occurred = FALSE;
5156
5157 /* setup timer0 on SCA0 to interrupt */
5158
5159 /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */
5160 write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4));
5161
5162 write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */
5163 write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */
5164
5165
5166 /* TMCS, Timer Control/Status Register
5167 *
5168 * 07 CMF, Compare match flag (read only) 1=match
5169 * 06 ECMI, CMF Interrupt Enable: 1=enabled
5170 * 05 Reserved, must be 0
5171 * 04 TME, Timer Enable
5172 * 03..00 Reserved, must be 0
5173 *
5174 * 0101 0000
5175 */
5176 write_reg(info, (unsigned char)(timer + TMCS), 0x50);
5177
5178 spin_unlock_irqrestore(&info->lock,flags);
5179
5180 timeout=100;
5181 while( timeout-- && !info->irq_occurred ) {
5182 msleep_interruptible(10);
5183 }
5184
5185 spin_lock_irqsave(&info->lock,flags);
5186 reset_port(info);
5187 spin_unlock_irqrestore(&info->lock,flags);
5188
5189 return info->irq_occurred;
5190 }
5191
5192 /* initialize individual SCA device (2 ports)
5193 */
5194 static int sca_init(SLMP_INFO *info)
5195 {
5196 /* set wait controller to single mem partition (low), no wait states */
5197 write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */
5198 write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */
5199 write_reg(info, WCRL, 0); /* wait controller low range */
5200 write_reg(info, WCRM, 0); /* wait controller mid range */
5201 write_reg(info, WCRH, 0); /* wait controller high range */
5202
5203 /* DPCR, DMA Priority Control
5204 *
5205 * 07..05 Not used, must be 0
5206 * 04 BRC, bus release condition: 0=all transfers complete
5207 * 03 CCC, channel change condition: 0=every cycle
5208 * 02..00 PR<2..0>, priority 100=round robin
5209 *
5210 * 00000100 = 0x04
5211 */
5212 write_reg(info, DPCR, dma_priority);
5213
5214 /* DMA Master Enable, BIT7: 1=enable all channels */
5215 write_reg(info, DMER, 0x80);
5216
5217 /* enable all interrupt classes */
5218 write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */
5219 write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */
5220 write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */
5221
5222 /* ITCR, interrupt control register
5223 * 07 IPC, interrupt priority, 0=MSCI->DMA
5224 * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle
5225 * 04 VOS, Vector Output, 0=unmodified vector
5226 * 03..00 Reserved, must be 0
5227 */
5228 write_reg(info, ITCR, 0);
5229
5230 return TRUE;
5231 }
5232
5233 /* initialize adapter hardware
5234 */
5235 int init_adapter(SLMP_INFO *info)
5236 {
5237 int i;
5238
5239 /* Set BIT30 of Local Control Reg 0x50 to reset SCA */
5240 volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
5241 u32 readval;
5242
5243 info->misc_ctrl_value |= BIT30;
5244 *MiscCtrl = info->misc_ctrl_value;
5245
5246 /*
5247 * Force at least 170ns delay before clearing
5248 * reset bit. Each read from LCR takes at least
5249 * 30ns so 10 times for 300ns to be safe.
5250 */
5251 for(i=0;i<10;i++)
5252 readval = *MiscCtrl;
5253
5254 info->misc_ctrl_value &= ~BIT30;
5255 *MiscCtrl = info->misc_ctrl_value;
5256
5257 /* init control reg (all DTRs off, all clksel=input) */
5258 info->ctrlreg_value = 0xaa;
5259 write_control_reg(info);
5260
5261 {
5262 volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c);
5263 lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3);
5264
5265 switch(read_ahead_count)
5266 {
5267 case 16:
5268 lcr1_brdr_value |= BIT5 + BIT4 + BIT3;
5269 break;
5270 case 8:
5271 lcr1_brdr_value |= BIT5 + BIT4;
5272 break;
5273 case 4:
5274 lcr1_brdr_value |= BIT5 + BIT3;
5275 break;
5276 case 0:
5277 lcr1_brdr_value |= BIT5;
5278 break;
5279 }
5280
5281 *LCR1BRDR = lcr1_brdr_value;
5282 *MiscCtrl = misc_ctrl_value;
5283 }
5284
5285 sca_init(info->port_array[0]);
5286 sca_init(info->port_array[2]);
5287
5288 return TRUE;
5289 }
5290
5291 /* Loopback an HDLC frame to test the hardware
5292 * interrupt and DMA functions.
5293 */
5294 int loopback_test(SLMP_INFO *info)
5295 {
5296 #define TESTFRAMESIZE 20
5297
5298 unsigned long timeout;
5299 u16 count = TESTFRAMESIZE;
5300 unsigned char buf[TESTFRAMESIZE];
5301 int rc = FALSE;
5302 unsigned long flags;
5303
5304 struct tty_struct *oldtty = info->tty;
5305 u32 speed = info->params.clock_speed;
5306
5307 info->params.clock_speed = 3686400;
5308 info->tty = NULL;
5309
5310 /* assume failure */
5311 info->init_error = DiagStatus_DmaFailure;
5312
5313 /* build and send transmit frame */
5314 for (count = 0; count < TESTFRAMESIZE;++count)
5315 buf[count] = (unsigned char)count;
5316
5317 memset(info->tmp_rx_buf,0,TESTFRAMESIZE);
5318
5319 /* program hardware for HDLC and enabled receiver */
5320 spin_lock_irqsave(&info->lock,flags);
5321 hdlc_mode(info);
5322 enable_loopback(info,1);
5323 rx_start(info);
5324 info->tx_count = count;
5325 tx_load_dma_buffer(info,buf,count);
5326 tx_start(info);
5327 spin_unlock_irqrestore(&info->lock,flags);
5328
5329 /* wait for receive complete */
5330 /* Set a timeout for waiting for interrupt. */
5331 for ( timeout = 100; timeout; --timeout ) {
5332 msleep_interruptible(10);
5333
5334 if (rx_get_frame(info)) {
5335 rc = TRUE;
5336 break;
5337 }
5338 }
5339
5340 /* verify received frame length and contents */
5341 if (rc == TRUE &&
5342 ( info->tmp_rx_buf_count != count ||
5343 memcmp(buf, info->tmp_rx_buf,count))) {
5344 rc = FALSE;
5345 }
5346
5347 spin_lock_irqsave(&info->lock,flags);
5348 reset_adapter(info);
5349 spin_unlock_irqrestore(&info->lock,flags);
5350
5351 info->params.clock_speed = speed;
5352 info->tty = oldtty;
5353
5354 return rc;
5355 }
5356
5357 /* Perform diagnostics on hardware
5358 */
5359 int adapter_test( SLMP_INFO *info )
5360 {
5361 unsigned long flags;
5362 if ( debug_level >= DEBUG_LEVEL_INFO )
5363 printk( "%s(%d):Testing device %s\n",
5364 __FILE__,__LINE__,info->device_name );
5365
5366 spin_lock_irqsave(&info->lock,flags);
5367 init_adapter(info);
5368 spin_unlock_irqrestore(&info->lock,flags);
5369
5370 info->port_array[0]->port_count = 0;
5371
5372 if ( register_test(info->port_array[0]) &&
5373 register_test(info->port_array[1])) {
5374
5375 info->port_array[0]->port_count = 2;
5376
5377 if ( register_test(info->port_array[2]) &&
5378 register_test(info->port_array[3]) )
5379 info->port_array[0]->port_count += 2;
5380 }
5381 else {
5382 printk( "%s(%d):Register test failure for device %s Addr=%08lX\n",
5383 __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base));
5384 return -ENODEV;
5385 }
5386
5387 if ( !irq_test(info->port_array[0]) ||
5388 !irq_test(info->port_array[1]) ||
5389 (info->port_count == 4 && !irq_test(info->port_array[2])) ||
5390 (info->port_count == 4 && !irq_test(info->port_array[3]))) {
5391 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
5392 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
5393 return -ENODEV;
5394 }
5395
5396 if (!loopback_test(info->port_array[0]) ||
5397 !loopback_test(info->port_array[1]) ||
5398 (info->port_count == 4 && !loopback_test(info->port_array[2])) ||
5399 (info->port_count == 4 && !loopback_test(info->port_array[3]))) {
5400 printk( "%s(%d):DMA test failure for device %s\n",
5401 __FILE__,__LINE__,info->device_name);
5402 return -ENODEV;
5403 }
5404
5405 if ( debug_level >= DEBUG_LEVEL_INFO )
5406 printk( "%s(%d):device %s passed diagnostics\n",
5407 __FILE__,__LINE__,info->device_name );
5408
5409 info->port_array[0]->init_error = 0;
5410 info->port_array[1]->init_error = 0;
5411 if ( info->port_count > 2 ) {
5412 info->port_array[2]->init_error = 0;
5413 info->port_array[3]->init_error = 0;
5414 }
5415
5416 return 0;
5417 }
5418
5419 /* Test the shared memory on a PCI adapter.
5420 */
5421 int memory_test(SLMP_INFO *info)
5422 {
5423 static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa,
5424 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
5425 unsigned long count = ARRAY_SIZE(testval);
5426 unsigned long i;
5427 unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long);
5428 unsigned long * addr = (unsigned long *)info->memory_base;
5429
5430 /* Test data lines with test pattern at one location. */
5431
5432 for ( i = 0 ; i < count ; i++ ) {
5433 *addr = testval[i];
5434 if ( *addr != testval[i] )
5435 return FALSE;
5436 }
5437
5438 /* Test address lines with incrementing pattern over */
5439 /* entire address range. */
5440
5441 for ( i = 0 ; i < limit ; i++ ) {
5442 *addr = i * 4;
5443 addr++;
5444 }
5445
5446 addr = (unsigned long *)info->memory_base;
5447
5448 for ( i = 0 ; i < limit ; i++ ) {
5449 if ( *addr != i * 4 )
5450 return FALSE;
5451 addr++;
5452 }
5453
5454 memset( info->memory_base, 0, SCA_MEM_SIZE );
5455 return TRUE;
5456 }
5457
5458 /* Load data into PCI adapter shared memory.
5459 *
5460 * The PCI9050 releases control of the local bus
5461 * after completing the current read or write operation.
5462 *
5463 * While the PCI9050 write FIFO not empty, the
5464 * PCI9050 treats all of the writes as a single transaction
5465 * and does not release the bus. This causes DMA latency problems
5466 * at high speeds when copying large data blocks to the shared memory.
5467 *
5468 * This function breaks a write into multiple transations by
5469 * interleaving a read which flushes the write FIFO and 'completes'
5470 * the write transation. This allows any pending DMA request to gain control
5471 * of the local bus in a timely fasion.
5472 */
5473 void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count)
5474 {
5475 /* A load interval of 16 allows for 4 32-bit writes at */
5476 /* 136ns each for a maximum latency of 542ns on the local bus.*/
5477
5478 unsigned short interval = count / sca_pci_load_interval;
5479 unsigned short i;
5480
5481 for ( i = 0 ; i < interval ; i++ )
5482 {
5483 memcpy(dest, src, sca_pci_load_interval);
5484 read_status_reg(info);
5485 dest += sca_pci_load_interval;
5486 src += sca_pci_load_interval;
5487 }
5488
5489 memcpy(dest, src, count % sca_pci_load_interval);
5490 }
5491
5492 void trace_block(SLMP_INFO *info,const char* data, int count, int xmit)
5493 {
5494 int i;
5495 int linecount;
5496 if (xmit)
5497 printk("%s tx data:\n",info->device_name);
5498 else
5499 printk("%s rx data:\n",info->device_name);
5500
5501 while(count) {
5502 if (count > 16)
5503 linecount = 16;
5504 else
5505 linecount = count;
5506
5507 for(i=0;i<linecount;i++)
5508 printk("%02X ",(unsigned char)data[i]);
5509 for(;i<17;i++)
5510 printk(" ");
5511 for(i=0;i<linecount;i++) {
5512 if (data[i]>=040 && data[i]<=0176)
5513 printk("%c",data[i]);
5514 else
5515 printk(".");
5516 }
5517 printk("\n");
5518
5519 data += linecount;
5520 count -= linecount;
5521 }
5522 } /* end of trace_block() */
5523
5524 /* called when HDLC frame times out
5525 * update stats and do tx completion processing
5526 */
5527 void tx_timeout(unsigned long context)
5528 {
5529 SLMP_INFO *info = (SLMP_INFO*)context;
5530 unsigned long flags;
5531
5532 if ( debug_level >= DEBUG_LEVEL_INFO )
5533 printk( "%s(%d):%s tx_timeout()\n",
5534 __FILE__,__LINE__,info->device_name);
5535 if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
5536 info->icount.txtimeout++;
5537 }
5538 spin_lock_irqsave(&info->lock,flags);
5539 info->tx_active = 0;
5540 info->tx_count = info->tx_put = info->tx_get = 0;
5541
5542 spin_unlock_irqrestore(&info->lock,flags);
5543
5544 #ifdef CONFIG_HDLC
5545 if (info->netcount)
5546 hdlcdev_tx_done(info);
5547 else
5548 #endif
5549 bh_transmit(info);
5550 }
5551
5552 /* called to periodically check the DSR/RI modem signal input status
5553 */
5554 void status_timeout(unsigned long context)
5555 {
5556 u16 status = 0;
5557 SLMP_INFO *info = (SLMP_INFO*)context;
5558 unsigned long flags;
5559 unsigned char delta;
5560
5561
5562 spin_lock_irqsave(&info->lock,flags);
5563 get_signals(info);
5564 spin_unlock_irqrestore(&info->lock,flags);
5565
5566 /* check for DSR/RI state change */
5567
5568 delta = info->old_signals ^ info->serial_signals;
5569 info->old_signals = info->serial_signals;
5570
5571 if (delta & SerialSignal_DSR)
5572 status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR);
5573
5574 if (delta & SerialSignal_RI)
5575 status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI);
5576
5577 if (delta & SerialSignal_DCD)
5578 status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD);
5579
5580 if (delta & SerialSignal_CTS)
5581 status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS);
5582
5583 if (status)
5584 isr_io_pin(info,status);
5585
5586 info->status_timer.data = (unsigned long)info;
5587 info->status_timer.function = status_timeout;
5588 info->status_timer.expires = jiffies + msecs_to_jiffies(10);
5589 add_timer(&info->status_timer);
5590 }
5591
5592
5593 /* Register Access Routines -
5594 * All registers are memory mapped
5595 */
5596 #define CALC_REGADDR() \
5597 unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \
5598 if (info->port_num > 1) \
5599 RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \
5600 if ( info->port_num & 1) { \
5601 if (Addr > 0x7f) \
5602 RegAddr += 0x40; /* DMA access */ \
5603 else if (Addr > 0x1f && Addr < 0x60) \
5604 RegAddr += 0x20; /* MSCI access */ \
5605 }
5606
5607
5608 unsigned char read_reg(SLMP_INFO * info, unsigned char Addr)
5609 {
5610 CALC_REGADDR();
5611 return *RegAddr;
5612 }
5613 void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value)
5614 {
5615 CALC_REGADDR();
5616 *RegAddr = Value;
5617 }
5618
5619 u16 read_reg16(SLMP_INFO * info, unsigned char Addr)
5620 {
5621 CALC_REGADDR();
5622 return *((u16 *)RegAddr);
5623 }
5624
5625 void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value)
5626 {
5627 CALC_REGADDR();
5628 *((u16 *)RegAddr) = Value;
5629 }
5630
5631 unsigned char read_status_reg(SLMP_INFO * info)
5632 {
5633 unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
5634 return *RegAddr;
5635 }
5636
5637 void write_control_reg(SLMP_INFO * info)
5638 {
5639 unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
5640 *RegAddr = info->port_array[0]->ctrlreg_value;
5641 }
5642
5643
5644 static int __devinit synclinkmp_init_one (struct pci_dev *dev,
5645 const struct pci_device_id *ent)
5646 {
5647 if (pci_enable_device(dev)) {
5648 printk("error enabling pci device %p\n", dev);
5649 return -EIO;
5650 }
5651 device_init( ++synclinkmp_adapter_count, dev );
5652 return 0;
5653 }
5654
5655 static void __devexit synclinkmp_remove_one (struct pci_dev *dev)
5656 {
5657 }
Linux kernel - Deliverables
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