Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/char/pcmcia/synclink_cs.c | |
3 | * | |
a7482a2e | 4 | * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $ |
1da177e4 LT |
5 | * |
6 | * Device driver for Microgate SyncLink PC Card | |
7 | * multiprotocol serial adapter. | |
8 | * | |
9 | * written by Paul Fulghum for Microgate Corporation | |
10 | * paulkf@microgate.com | |
11 | * | |
12 | * Microgate and SyncLink are trademarks of Microgate Corporation | |
13 | * | |
14 | * This code is released under the GNU General Public License (GPL) | |
15 | * | |
16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
19 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
20 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
24 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
27 | */ | |
28 | ||
29 | #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) | |
30 | #if defined(__i386__) | |
31 | # define BREAKPOINT() asm(" int $3"); | |
32 | #else | |
33 | # define BREAKPOINT() { } | |
34 | #endif | |
35 | ||
36 | #define MAX_DEVICE_COUNT 4 | |
37 | ||
1da177e4 LT |
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/time.h> | |
44 | #include <linux/interrupt.h> | |
1da177e4 LT |
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> | |
87687144 | 54 | #include <linux/seq_file.h> |
1da177e4 LT |
55 | #include <linux/slab.h> |
56 | #include <linux/netdevice.h> | |
57 | #include <linux/vmalloc.h> | |
58 | #include <linux/init.h> | |
1da177e4 LT |
59 | #include <linux/delay.h> |
60 | #include <linux/ioctl.h> | |
3dd1247f | 61 | #include <linux/synclink.h> |
1da177e4 LT |
62 | |
63 | #include <asm/system.h> | |
64 | #include <asm/io.h> | |
65 | #include <asm/irq.h> | |
66 | #include <asm/dma.h> | |
67 | #include <linux/bitops.h> | |
68 | #include <asm/types.h> | |
69 | #include <linux/termios.h> | |
70 | #include <linux/workqueue.h> | |
71 | #include <linux/hdlc.h> | |
72 | ||
1da177e4 LT |
73 | #include <pcmcia/cs.h> |
74 | #include <pcmcia/cistpl.h> | |
75 | #include <pcmcia/cisreg.h> | |
76 | #include <pcmcia/ds.h> | |
77 | ||
af69c7f9 PF |
78 | #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE)) |
79 | #define SYNCLINK_GENERIC_HDLC 1 | |
80 | #else | |
81 | #define SYNCLINK_GENERIC_HDLC 0 | |
1da177e4 LT |
82 | #endif |
83 | ||
84 | #define GET_USER(error,value,addr) error = get_user(value,addr) | |
85 | #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 | |
86 | #define PUT_USER(error,value,addr) error = put_user(value,addr) | |
87 | #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 | |
88 | ||
89 | #include <asm/uaccess.h> | |
90 | ||
1da177e4 LT |
91 | static MGSL_PARAMS default_params = { |
92 | MGSL_MODE_HDLC, /* unsigned long mode */ | |
93 | 0, /* unsigned char loopback; */ | |
94 | HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ | |
95 | HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ | |
96 | 0, /* unsigned long clock_speed; */ | |
97 | 0xff, /* unsigned char addr_filter; */ | |
98 | HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ | |
99 | HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ | |
100 | HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ | |
101 | 9600, /* unsigned long data_rate; */ | |
102 | 8, /* unsigned char data_bits; */ | |
103 | 1, /* unsigned char stop_bits; */ | |
104 | ASYNC_PARITY_NONE /* unsigned char parity; */ | |
105 | }; | |
106 | ||
107 | typedef struct | |
108 | { | |
109 | int count; | |
110 | unsigned char status; | |
111 | char data[1]; | |
112 | } RXBUF; | |
113 | ||
114 | /* The queue of BH actions to be performed */ | |
115 | ||
116 | #define BH_RECEIVE 1 | |
117 | #define BH_TRANSMIT 2 | |
118 | #define BH_STATUS 4 | |
119 | ||
120 | #define IO_PIN_SHUTDOWN_LIMIT 100 | |
121 | ||
122 | #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) | |
123 | ||
124 | struct _input_signal_events { | |
d12341f9 | 125 | int ri_up; |
1da177e4 LT |
126 | int ri_down; |
127 | int dsr_up; | |
128 | int dsr_down; | |
129 | int dcd_up; | |
130 | int dcd_down; | |
131 | int cts_up; | |
132 | int cts_down; | |
133 | }; | |
134 | ||
135 | ||
136 | /* | |
137 | * Device instance data structure | |
138 | */ | |
d12341f9 | 139 | |
1da177e4 | 140 | typedef struct _mgslpc_info { |
eeb46134 | 141 | struct tty_port port; |
1da177e4 LT |
142 | void *if_ptr; /* General purpose pointer (used by SPPP) */ |
143 | int magic; | |
1da177e4 | 144 | int line; |
d12341f9 | 145 | |
1da177e4 | 146 | struct mgsl_icount icount; |
d12341f9 | 147 | |
1da177e4 LT |
148 | int timeout; |
149 | int x_char; /* xon/xoff character */ | |
1da177e4 | 150 | unsigned char read_status_mask; |
d12341f9 | 151 | unsigned char ignore_status_mask; |
1da177e4 LT |
152 | |
153 | unsigned char *tx_buf; | |
154 | int tx_put; | |
155 | int tx_get; | |
156 | int tx_count; | |
157 | ||
158 | /* circular list of fixed length rx buffers */ | |
159 | ||
160 | unsigned char *rx_buf; /* memory allocated for all rx buffers */ | |
161 | int rx_buf_total_size; /* size of memory allocated for rx buffers */ | |
162 | int rx_put; /* index of next empty rx buffer */ | |
163 | int rx_get; /* index of next full rx buffer */ | |
164 | int rx_buf_size; /* size in bytes of single rx buffer */ | |
165 | int rx_buf_count; /* total number of rx buffers */ | |
166 | int rx_frame_count; /* number of full rx buffers */ | |
d12341f9 | 167 | |
1da177e4 LT |
168 | wait_queue_head_t status_event_wait_q; |
169 | wait_queue_head_t event_wait_q; | |
170 | struct timer_list tx_timer; /* HDLC transmit timeout timer */ | |
171 | struct _mgslpc_info *next_device; /* device list link */ | |
172 | ||
173 | unsigned short imra_value; | |
174 | unsigned short imrb_value; | |
175 | unsigned char pim_value; | |
176 | ||
177 | spinlock_t lock; | |
178 | struct work_struct task; /* task structure for scheduling bh */ | |
179 | ||
180 | u32 max_frame_size; | |
181 | ||
182 | u32 pending_bh; | |
183 | ||
0fab6de0 JP |
184 | bool bh_running; |
185 | bool bh_requested; | |
d12341f9 | 186 | |
1da177e4 LT |
187 | int dcd_chkcount; /* check counts to prevent */ |
188 | int cts_chkcount; /* too many IRQs if a signal */ | |
189 | int dsr_chkcount; /* is floating */ | |
190 | int ri_chkcount; | |
191 | ||
0fab6de0 JP |
192 | bool rx_enabled; |
193 | bool rx_overflow; | |
1da177e4 | 194 | |
0fab6de0 JP |
195 | bool tx_enabled; |
196 | bool tx_active; | |
197 | bool tx_aborting; | |
1da177e4 LT |
198 | u32 idle_mode; |
199 | ||
200 | int if_mode; /* serial interface selection (RS-232, v.35 etc) */ | |
201 | ||
202 | char device_name[25]; /* device instance name */ | |
203 | ||
204 | unsigned int io_base; /* base I/O address of adapter */ | |
205 | unsigned int irq_level; | |
d12341f9 | 206 | |
1da177e4 LT |
207 | MGSL_PARAMS params; /* communications parameters */ |
208 | ||
209 | unsigned char serial_signals; /* current serial signal states */ | |
210 | ||
0fab6de0 | 211 | bool irq_occurred; /* for diagnostics use */ |
1da177e4 LT |
212 | char testing_irq; |
213 | unsigned int init_error; /* startup error (DIAGS) */ | |
214 | ||
215 | char flag_buf[MAX_ASYNC_BUFFER_SIZE]; | |
0fab6de0 | 216 | bool drop_rts_on_tx_done; |
1da177e4 LT |
217 | |
218 | struct _input_signal_events input_signal_events; | |
219 | ||
220 | /* PCMCIA support */ | |
fd238232 | 221 | struct pcmcia_device *p_dev; |
1da177e4 LT |
222 | int stop; |
223 | ||
224 | /* SPPP/Cisco HDLC device parts */ | |
225 | int netcount; | |
1da177e4 LT |
226 | spinlock_t netlock; |
227 | ||
af69c7f9 | 228 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
229 | struct net_device *netdev; |
230 | #endif | |
231 | ||
232 | } MGSLPC_INFO; | |
233 | ||
234 | #define MGSLPC_MAGIC 0x5402 | |
235 | ||
236 | /* | |
237 | * The size of the serial xmit buffer is 1 page, or 4096 bytes | |
238 | */ | |
239 | #define TXBUFSIZE 4096 | |
240 | ||
d12341f9 | 241 | |
1da177e4 LT |
242 | #define CHA 0x00 /* channel A offset */ |
243 | #define CHB 0x40 /* channel B offset */ | |
244 | ||
245 | /* | |
246 | * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it. | |
247 | */ | |
248 | #undef PVR | |
249 | ||
250 | #define RXFIFO 0 | |
251 | #define TXFIFO 0 | |
252 | #define STAR 0x20 | |
253 | #define CMDR 0x20 | |
254 | #define RSTA 0x21 | |
255 | #define PRE 0x21 | |
256 | #define MODE 0x22 | |
257 | #define TIMR 0x23 | |
258 | #define XAD1 0x24 | |
259 | #define XAD2 0x25 | |
260 | #define RAH1 0x26 | |
261 | #define RAH2 0x27 | |
262 | #define DAFO 0x27 | |
263 | #define RAL1 0x28 | |
264 | #define RFC 0x28 | |
265 | #define RHCR 0x29 | |
266 | #define RAL2 0x29 | |
267 | #define RBCL 0x2a | |
268 | #define XBCL 0x2a | |
269 | #define RBCH 0x2b | |
270 | #define XBCH 0x2b | |
271 | #define CCR0 0x2c | |
272 | #define CCR1 0x2d | |
273 | #define CCR2 0x2e | |
274 | #define CCR3 0x2f | |
275 | #define VSTR 0x34 | |
276 | #define BGR 0x34 | |
277 | #define RLCR 0x35 | |
278 | #define AML 0x36 | |
279 | #define AMH 0x37 | |
280 | #define GIS 0x38 | |
281 | #define IVA 0x38 | |
282 | #define IPC 0x39 | |
283 | #define ISR 0x3a | |
284 | #define IMR 0x3a | |
285 | #define PVR 0x3c | |
286 | #define PIS 0x3d | |
287 | #define PIM 0x3d | |
288 | #define PCR 0x3e | |
289 | #define CCR4 0x3f | |
d12341f9 | 290 | |
1da177e4 | 291 | // IMR/ISR |
d12341f9 | 292 | |
1da177e4 LT |
293 | #define IRQ_BREAK_ON BIT15 // rx break detected |
294 | #define IRQ_DATAOVERRUN BIT14 // receive data overflow | |
295 | #define IRQ_ALLSENT BIT13 // all sent | |
296 | #define IRQ_UNDERRUN BIT12 // transmit data underrun | |
297 | #define IRQ_TIMER BIT11 // timer interrupt | |
298 | #define IRQ_CTS BIT10 // CTS status change | |
299 | #define IRQ_TXREPEAT BIT9 // tx message repeat | |
300 | #define IRQ_TXFIFO BIT8 // transmit pool ready | |
301 | #define IRQ_RXEOM BIT7 // receive message end | |
302 | #define IRQ_EXITHUNT BIT6 // receive frame start | |
303 | #define IRQ_RXTIME BIT6 // rx char timeout | |
304 | #define IRQ_DCD BIT2 // carrier detect status change | |
305 | #define IRQ_OVERRUN BIT1 // receive frame overflow | |
306 | #define IRQ_RXFIFO BIT0 // receive pool full | |
d12341f9 | 307 | |
1da177e4 | 308 | // STAR |
d12341f9 | 309 | |
1da177e4 LT |
310 | #define XFW BIT6 // transmit FIFO write enable |
311 | #define CEC BIT2 // command executing | |
312 | #define CTS BIT1 // CTS state | |
d12341f9 | 313 | |
1da177e4 LT |
314 | #define PVR_DTR BIT0 |
315 | #define PVR_DSR BIT1 | |
316 | #define PVR_RI BIT2 | |
317 | #define PVR_AUTOCTS BIT3 | |
318 | #define PVR_RS232 0x20 /* 0010b */ | |
319 | #define PVR_V35 0xe0 /* 1110b */ | |
320 | #define PVR_RS422 0x40 /* 0100b */ | |
d12341f9 JG |
321 | |
322 | /* Register access functions */ | |
323 | ||
1da177e4 LT |
324 | #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg)) |
325 | #define read_reg(info, reg) inb((info)->io_base + (reg)) | |
326 | ||
d12341f9 | 327 | #define read_reg16(info, reg) inw((info)->io_base + (reg)) |
1da177e4 | 328 | #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg)) |
d12341f9 | 329 | |
1da177e4 LT |
330 | #define set_reg_bits(info, reg, mask) \ |
331 | write_reg(info, (reg), \ | |
d12341f9 | 332 | (unsigned char) (read_reg(info, (reg)) | (mask))) |
1da177e4 LT |
333 | #define clear_reg_bits(info, reg, mask) \ |
334 | write_reg(info, (reg), \ | |
d12341f9 | 335 | (unsigned char) (read_reg(info, (reg)) & ~(mask))) |
1da177e4 LT |
336 | /* |
337 | * interrupt enable/disable routines | |
d12341f9 JG |
338 | */ |
339 | static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) | |
1da177e4 LT |
340 | { |
341 | if (channel == CHA) { | |
342 | info->imra_value |= mask; | |
343 | write_reg16(info, CHA + IMR, info->imra_value); | |
344 | } else { | |
345 | info->imrb_value |= mask; | |
346 | write_reg16(info, CHB + IMR, info->imrb_value); | |
347 | } | |
348 | } | |
d12341f9 | 349 | static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) |
1da177e4 LT |
350 | { |
351 | if (channel == CHA) { | |
352 | info->imra_value &= ~mask; | |
353 | write_reg16(info, CHA + IMR, info->imra_value); | |
354 | } else { | |
355 | info->imrb_value &= ~mask; | |
356 | write_reg16(info, CHB + IMR, info->imrb_value); | |
357 | } | |
358 | } | |
359 | ||
360 | #define port_irq_disable(info, mask) \ | |
361 | { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); } | |
362 | ||
363 | #define port_irq_enable(info, mask) \ | |
364 | { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); } | |
365 | ||
366 | static void rx_start(MGSLPC_INFO *info); | |
367 | static void rx_stop(MGSLPC_INFO *info); | |
368 | ||
eeb46134 | 369 | static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty); |
1da177e4 LT |
370 | static void tx_stop(MGSLPC_INFO *info); |
371 | static void tx_set_idle(MGSLPC_INFO *info); | |
372 | ||
373 | static void get_signals(MGSLPC_INFO *info); | |
374 | static void set_signals(MGSLPC_INFO *info); | |
375 | ||
376 | static void reset_device(MGSLPC_INFO *info); | |
377 | ||
378 | static void hdlc_mode(MGSLPC_INFO *info); | |
379 | static void async_mode(MGSLPC_INFO *info); | |
380 | ||
381 | static void tx_timeout(unsigned long context); | |
382 | ||
eeb46134 | 383 | static int carrier_raised(struct tty_port *port); |
fcc8ac18 | 384 | static void dtr_rts(struct tty_port *port, int onoff); |
1da177e4 | 385 | |
af69c7f9 | 386 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
387 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
388 | static void hdlcdev_tx_done(MGSLPC_INFO *info); | |
389 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size); | |
390 | static int hdlcdev_init(MGSLPC_INFO *info); | |
391 | static void hdlcdev_exit(MGSLPC_INFO *info); | |
392 | #endif | |
393 | ||
394 | static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit); | |
395 | ||
0fab6de0 JP |
396 | static bool register_test(MGSLPC_INFO *info); |
397 | static bool irq_test(MGSLPC_INFO *info); | |
1da177e4 LT |
398 | static int adapter_test(MGSLPC_INFO *info); |
399 | ||
400 | static int claim_resources(MGSLPC_INFO *info); | |
401 | static void release_resources(MGSLPC_INFO *info); | |
402 | static void mgslpc_add_device(MGSLPC_INFO *info); | |
403 | static void mgslpc_remove_device(MGSLPC_INFO *info); | |
404 | ||
eeb46134 | 405 | static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty); |
1da177e4 LT |
406 | static void rx_reset_buffers(MGSLPC_INFO *info); |
407 | static int rx_alloc_buffers(MGSLPC_INFO *info); | |
408 | static void rx_free_buffers(MGSLPC_INFO *info); | |
409 | ||
7d12e780 | 410 | static irqreturn_t mgslpc_isr(int irq, void *dev_id); |
1da177e4 LT |
411 | |
412 | /* | |
413 | * Bottom half interrupt handlers | |
414 | */ | |
c4028958 | 415 | static void bh_handler(struct work_struct *work); |
eeb46134 | 416 | static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty); |
1da177e4 LT |
417 | static void bh_status(MGSLPC_INFO *info); |
418 | ||
419 | /* | |
420 | * ioctl handlers | |
421 | */ | |
422 | static int tiocmget(struct tty_struct *tty, struct file *file); | |
423 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
424 | unsigned int set, unsigned int clear); | |
425 | static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount); | |
426 | static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params); | |
eeb46134 | 427 | static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params, struct tty_struct *tty); |
1da177e4 LT |
428 | static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode); |
429 | static int set_txidle(MGSLPC_INFO *info, int idle_mode); | |
eeb46134 | 430 | static int set_txenable(MGSLPC_INFO *info, int enable, struct tty_struct *tty); |
1da177e4 LT |
431 | static int tx_abort(MGSLPC_INFO *info); |
432 | static int set_rxenable(MGSLPC_INFO *info, int enable); | |
433 | static int wait_events(MGSLPC_INFO *info, int __user *mask); | |
434 | ||
435 | static MGSLPC_INFO *mgslpc_device_list = NULL; | |
436 | static int mgslpc_device_count = 0; | |
437 | ||
438 | /* | |
439 | * Set this param to non-zero to load eax with the | |
440 | * .text section address and breakpoint on module load. | |
441 | * This is useful for use with gdb and add-symbol-file command. | |
442 | */ | |
443 | static int break_on_load=0; | |
444 | ||
445 | /* | |
446 | * Driver major number, defaults to zero to get auto | |
447 | * assigned major number. May be forced as module parameter. | |
448 | */ | |
449 | static int ttymajor=0; | |
450 | ||
451 | static int debug_level = 0; | |
452 | static int maxframe[MAX_DEVICE_COUNT] = {0,}; | |
1da177e4 LT |
453 | |
454 | module_param(break_on_load, bool, 0); | |
455 | module_param(ttymajor, int, 0); | |
456 | module_param(debug_level, int, 0); | |
457 | module_param_array(maxframe, int, NULL, 0); | |
1da177e4 LT |
458 | |
459 | MODULE_LICENSE("GPL"); | |
460 | ||
461 | static char *driver_name = "SyncLink PC Card driver"; | |
a7482a2e | 462 | static char *driver_version = "$Revision: 4.34 $"; |
1da177e4 LT |
463 | |
464 | static struct tty_driver *serial_driver; | |
465 | ||
466 | /* number of characters left in xmit buffer before we ask for more */ | |
467 | #define WAKEUP_CHARS 256 | |
468 | ||
eeb46134 | 469 | static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty); |
1da177e4 LT |
470 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout); |
471 | ||
472 | /* PCMCIA prototypes */ | |
473 | ||
15b99ac1 | 474 | static int mgslpc_config(struct pcmcia_device *link); |
1da177e4 | 475 | static void mgslpc_release(u_long arg); |
cc3b4866 | 476 | static void mgslpc_detach(struct pcmcia_device *p_dev); |
1da177e4 | 477 | |
1da177e4 LT |
478 | /* |
479 | * 1st function defined in .text section. Calling this function in | |
480 | * init_module() followed by a breakpoint allows a remote debugger | |
481 | * (gdb) to get the .text address for the add-symbol-file command. | |
482 | * This allows remote debugging of dynamically loadable modules. | |
483 | */ | |
484 | static void* mgslpc_get_text_ptr(void) | |
485 | { | |
486 | return mgslpc_get_text_ptr; | |
487 | } | |
488 | ||
489 | /** | |
490 | * line discipline callback wrappers | |
491 | * | |
492 | * The wrappers maintain line discipline references | |
493 | * while calling into the line discipline. | |
494 | * | |
1da177e4 LT |
495 | * ldisc_receive_buf - pass receive data to line discipline |
496 | */ | |
497 | ||
1da177e4 LT |
498 | static void ldisc_receive_buf(struct tty_struct *tty, |
499 | const __u8 *data, char *flags, int count) | |
500 | { | |
501 | struct tty_ldisc *ld; | |
502 | if (!tty) | |
503 | return; | |
504 | ld = tty_ldisc_ref(tty); | |
505 | if (ld) { | |
a352def2 AC |
506 | if (ld->ops->receive_buf) |
507 | ld->ops->receive_buf(tty, data, flags, count); | |
1da177e4 LT |
508 | tty_ldisc_deref(ld); |
509 | } | |
510 | } | |
511 | ||
eeb46134 AC |
512 | static const struct tty_port_operations mgslpc_port_ops = { |
513 | .carrier_raised = carrier_raised, | |
fcc8ac18 | 514 | .dtr_rts = dtr_rts |
eeb46134 AC |
515 | }; |
516 | ||
15b99ac1 | 517 | static int mgslpc_probe(struct pcmcia_device *link) |
1da177e4 LT |
518 | { |
519 | MGSLPC_INFO *info; | |
15b99ac1 | 520 | int ret; |
fd238232 | 521 | |
1da177e4 LT |
522 | if (debug_level >= DEBUG_LEVEL_INFO) |
523 | printk("mgslpc_attach\n"); | |
fd238232 | 524 | |
dd00cc48 | 525 | info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL); |
1da177e4 LT |
526 | if (!info) { |
527 | printk("Error can't allocate device instance data\n"); | |
f8cfa618 | 528 | return -ENOMEM; |
1da177e4 LT |
529 | } |
530 | ||
1da177e4 | 531 | info->magic = MGSLPC_MAGIC; |
eeb46134 AC |
532 | tty_port_init(&info->port); |
533 | info->port.ops = &mgslpc_port_ops; | |
c4028958 | 534 | INIT_WORK(&info->task, bh_handler); |
1da177e4 | 535 | info->max_frame_size = 4096; |
eeb46134 AC |
536 | info->port.close_delay = 5*HZ/10; |
537 | info->port.closing_wait = 30*HZ; | |
1da177e4 LT |
538 | init_waitqueue_head(&info->status_event_wait_q); |
539 | init_waitqueue_head(&info->event_wait_q); | |
540 | spin_lock_init(&info->lock); | |
541 | spin_lock_init(&info->netlock); | |
542 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); | |
d12341f9 | 543 | info->idle_mode = HDLC_TXIDLE_FLAGS; |
1da177e4 LT |
544 | info->imra_value = 0xffff; |
545 | info->imrb_value = 0xffff; | |
546 | info->pim_value = 0xff; | |
547 | ||
fba395ee | 548 | info->p_dev = link; |
1da177e4 | 549 | link->priv = info; |
fd238232 | 550 | |
fba395ee | 551 | /* Initialize the struct pcmcia_device structure */ |
1da177e4 | 552 | |
1da177e4 | 553 | link->conf.Attributes = 0; |
1da177e4 LT |
554 | link->conf.IntType = INT_MEMORY_AND_IO; |
555 | ||
15b99ac1 DB |
556 | ret = mgslpc_config(link); |
557 | if (ret) | |
558 | return ret; | |
1da177e4 LT |
559 | |
560 | mgslpc_add_device(info); | |
561 | ||
f8cfa618 | 562 | return 0; |
1da177e4 LT |
563 | } |
564 | ||
565 | /* Card has been inserted. | |
566 | */ | |
567 | ||
aaa8cfda DB |
568 | static int mgslpc_ioprobe(struct pcmcia_device *p_dev, |
569 | cistpl_cftable_entry_t *cfg, | |
570 | cistpl_cftable_entry_t *dflt, | |
571 | unsigned int vcc, | |
572 | void *priv_data) | |
573 | { | |
90abdc3b DB |
574 | if (!cfg->io.nwin) |
575 | return -ENODEV; | |
576 | ||
577 | p_dev->resource[0]->start = cfg->io.win[0].base; | |
578 | p_dev->resource[0]->end = cfg->io.win[0].len; | |
579 | p_dev->resource[0]->flags |= pcmcia_io_cfg_data_width(cfg->io.flags); | |
580 | p_dev->io_lines = cfg->io.flags & CISTPL_IO_LINES_MASK; | |
581 | ||
582 | return pcmcia_request_io(p_dev); | |
aaa8cfda DB |
583 | } |
584 | ||
15b99ac1 | 585 | static int mgslpc_config(struct pcmcia_device *link) |
1da177e4 | 586 | { |
1da177e4 | 587 | MGSLPC_INFO *info = link->priv; |
cbf624f0 | 588 | int ret; |
d12341f9 | 589 | |
1da177e4 LT |
590 | if (debug_level >= DEBUG_LEVEL_INFO) |
591 | printk("mgslpc_config(0x%p)\n", link); | |
592 | ||
cbf624f0 DB |
593 | ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL); |
594 | if (ret != 0) | |
595 | goto failed; | |
1da177e4 | 596 | |
1da177e4 | 597 | link->conf.Attributes = CONF_ENABLE_IRQ; |
1da177e4 LT |
598 | link->conf.IntType = INT_MEMORY_AND_IO; |
599 | link->conf.ConfigIndex = 8; | |
600 | link->conf.Present = PRESENT_OPTION; | |
d12341f9 | 601 | |
eb14120f | 602 | ret = pcmcia_request_irq(link, mgslpc_isr); |
cbf624f0 DB |
603 | if (ret) |
604 | goto failed; | |
605 | ret = pcmcia_request_configuration(link, &link->conf); | |
606 | if (ret) | |
607 | goto failed; | |
1da177e4 | 608 | |
9a017a91 | 609 | info->io_base = link->resource[0]->start; |
eb14120f | 610 | info->irq_level = link->irq; |
1da177e4 | 611 | |
ded6a1a3 DB |
612 | dev_info(&link->dev, "index 0x%02x:", |
613 | link->conf.ConfigIndex); | |
1da177e4 | 614 | if (link->conf.Attributes & CONF_ENABLE_IRQ) |
eb14120f | 615 | printk(", irq %d", link->irq); |
9a017a91 DB |
616 | if (link->resource[0]) |
617 | printk(", io %pR", link->resource[0]); | |
1da177e4 | 618 | printk("\n"); |
15b99ac1 | 619 | return 0; |
1da177e4 | 620 | |
cbf624f0 | 621 | failed: |
1da177e4 | 622 | mgslpc_release((u_long)link); |
15b99ac1 | 623 | return -ENODEV; |
1da177e4 LT |
624 | } |
625 | ||
626 | /* Card has been removed. | |
627 | * Unregister device and release PCMCIA configuration. | |
628 | * If device is open, postpone until it is closed. | |
629 | */ | |
630 | static void mgslpc_release(u_long arg) | |
631 | { | |
e2d40963 | 632 | struct pcmcia_device *link = (struct pcmcia_device *)arg; |
1da177e4 | 633 | |
e2d40963 DB |
634 | if (debug_level >= DEBUG_LEVEL_INFO) |
635 | printk("mgslpc_release(0x%p)\n", link); | |
1da177e4 | 636 | |
e2d40963 | 637 | pcmcia_disable_device(link); |
1da177e4 LT |
638 | } |
639 | ||
fba395ee | 640 | static void mgslpc_detach(struct pcmcia_device *link) |
1da177e4 | 641 | { |
e2d40963 DB |
642 | if (debug_level >= DEBUG_LEVEL_INFO) |
643 | printk("mgslpc_detach(0x%p)\n", link); | |
cc3b4866 | 644 | |
e2d40963 DB |
645 | ((MGSLPC_INFO *)link->priv)->stop = 1; |
646 | mgslpc_release((u_long)link); | |
1da177e4 | 647 | |
e2d40963 | 648 | mgslpc_remove_device((MGSLPC_INFO *)link->priv); |
1da177e4 LT |
649 | } |
650 | ||
fba395ee | 651 | static int mgslpc_suspend(struct pcmcia_device *link) |
98e4c28b | 652 | { |
98e4c28b DB |
653 | MGSLPC_INFO *info = link->priv; |
654 | ||
98e4c28b | 655 | info->stop = 1; |
98e4c28b DB |
656 | |
657 | return 0; | |
658 | } | |
659 | ||
fba395ee | 660 | static int mgslpc_resume(struct pcmcia_device *link) |
98e4c28b | 661 | { |
98e4c28b DB |
662 | MGSLPC_INFO *info = link->priv; |
663 | ||
98e4c28b DB |
664 | info->stop = 0; |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
669 | ||
0fab6de0 | 670 | static inline bool mgslpc_paranoia_check(MGSLPC_INFO *info, |
1da177e4 LT |
671 | char *name, const char *routine) |
672 | { | |
673 | #ifdef MGSLPC_PARANOIA_CHECK | |
674 | static const char *badmagic = | |
675 | "Warning: bad magic number for mgsl struct (%s) in %s\n"; | |
676 | static const char *badinfo = | |
677 | "Warning: null mgslpc_info for (%s) in %s\n"; | |
678 | ||
679 | if (!info) { | |
680 | printk(badinfo, name, routine); | |
0fab6de0 | 681 | return true; |
1da177e4 LT |
682 | } |
683 | if (info->magic != MGSLPC_MAGIC) { | |
684 | printk(badmagic, name, routine); | |
0fab6de0 | 685 | return true; |
1da177e4 LT |
686 | } |
687 | #else | |
688 | if (!info) | |
0fab6de0 | 689 | return true; |
1da177e4 | 690 | #endif |
0fab6de0 | 691 | return false; |
1da177e4 LT |
692 | } |
693 | ||
694 | ||
695 | #define CMD_RXFIFO BIT7 // release current rx FIFO | |
696 | #define CMD_RXRESET BIT6 // receiver reset | |
697 | #define CMD_RXFIFO_READ BIT5 | |
698 | #define CMD_START_TIMER BIT4 | |
699 | #define CMD_TXFIFO BIT3 // release current tx FIFO | |
700 | #define CMD_TXEOM BIT1 // transmit end message | |
701 | #define CMD_TXRESET BIT0 // transmit reset | |
702 | ||
0fab6de0 | 703 | static bool wait_command_complete(MGSLPC_INFO *info, unsigned char channel) |
1da177e4 LT |
704 | { |
705 | int i = 0; | |
d12341f9 | 706 | /* wait for command completion */ |
1da177e4 LT |
707 | while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) { |
708 | udelay(1); | |
709 | if (i++ == 1000) | |
0fab6de0 | 710 | return false; |
1da177e4 | 711 | } |
0fab6de0 | 712 | return true; |
1da177e4 LT |
713 | } |
714 | ||
d12341f9 | 715 | static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd) |
1da177e4 LT |
716 | { |
717 | wait_command_complete(info, channel); | |
718 | write_reg(info, (unsigned char) (channel + CMDR), cmd); | |
719 | } | |
720 | ||
721 | static void tx_pause(struct tty_struct *tty) | |
722 | { | |
723 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
724 | unsigned long flags; | |
d12341f9 | 725 | |
1da177e4 LT |
726 | if (mgslpc_paranoia_check(info, tty->name, "tx_pause")) |
727 | return; | |
728 | if (debug_level >= DEBUG_LEVEL_INFO) | |
d12341f9 JG |
729 | printk("tx_pause(%s)\n",info->device_name); |
730 | ||
1da177e4 LT |
731 | spin_lock_irqsave(&info->lock,flags); |
732 | if (info->tx_enabled) | |
733 | tx_stop(info); | |
734 | spin_unlock_irqrestore(&info->lock,flags); | |
735 | } | |
736 | ||
737 | static void tx_release(struct tty_struct *tty) | |
738 | { | |
739 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
740 | unsigned long flags; | |
d12341f9 | 741 | |
1da177e4 LT |
742 | if (mgslpc_paranoia_check(info, tty->name, "tx_release")) |
743 | return; | |
744 | if (debug_level >= DEBUG_LEVEL_INFO) | |
d12341f9 JG |
745 | printk("tx_release(%s)\n",info->device_name); |
746 | ||
1da177e4 LT |
747 | spin_lock_irqsave(&info->lock,flags); |
748 | if (!info->tx_enabled) | |
eeb46134 | 749 | tx_start(info, tty); |
1da177e4 LT |
750 | spin_unlock_irqrestore(&info->lock,flags); |
751 | } | |
752 | ||
753 | /* Return next bottom half action to perform. | |
754 | * or 0 if nothing to do. | |
755 | */ | |
756 | static int bh_action(MGSLPC_INFO *info) | |
757 | { | |
758 | unsigned long flags; | |
759 | int rc = 0; | |
d12341f9 | 760 | |
1da177e4 LT |
761 | spin_lock_irqsave(&info->lock,flags); |
762 | ||
763 | if (info->pending_bh & BH_RECEIVE) { | |
764 | info->pending_bh &= ~BH_RECEIVE; | |
765 | rc = BH_RECEIVE; | |
766 | } else if (info->pending_bh & BH_TRANSMIT) { | |
767 | info->pending_bh &= ~BH_TRANSMIT; | |
768 | rc = BH_TRANSMIT; | |
769 | } else if (info->pending_bh & BH_STATUS) { | |
770 | info->pending_bh &= ~BH_STATUS; | |
771 | rc = BH_STATUS; | |
772 | } | |
773 | ||
774 | if (!rc) { | |
775 | /* Mark BH routine as complete */ | |
0fab6de0 JP |
776 | info->bh_running = false; |
777 | info->bh_requested = false; | |
1da177e4 | 778 | } |
d12341f9 | 779 | |
1da177e4 | 780 | spin_unlock_irqrestore(&info->lock,flags); |
d12341f9 | 781 | |
1da177e4 LT |
782 | return rc; |
783 | } | |
784 | ||
c4028958 | 785 | static void bh_handler(struct work_struct *work) |
1da177e4 | 786 | { |
c4028958 | 787 | MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task); |
eeb46134 | 788 | struct tty_struct *tty; |
1da177e4 LT |
789 | int action; |
790 | ||
791 | if (!info) | |
792 | return; | |
d12341f9 | 793 | |
1da177e4 LT |
794 | if (debug_level >= DEBUG_LEVEL_BH) |
795 | printk( "%s(%d):bh_handler(%s) entry\n", | |
796 | __FILE__,__LINE__,info->device_name); | |
d12341f9 | 797 | |
0fab6de0 | 798 | info->bh_running = true; |
eeb46134 | 799 | tty = tty_port_tty_get(&info->port); |
1da177e4 LT |
800 | |
801 | while((action = bh_action(info)) != 0) { | |
d12341f9 | 802 | |
1da177e4 LT |
803 | /* Process work item */ |
804 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
805 | printk( "%s(%d):bh_handler() work item action=%d\n", | |
806 | __FILE__,__LINE__,action); | |
807 | ||
808 | switch (action) { | |
d12341f9 | 809 | |
1da177e4 | 810 | case BH_RECEIVE: |
eeb46134 | 811 | while(rx_get_frame(info, tty)); |
1da177e4 LT |
812 | break; |
813 | case BH_TRANSMIT: | |
eeb46134 | 814 | bh_transmit(info, tty); |
1da177e4 LT |
815 | break; |
816 | case BH_STATUS: | |
817 | bh_status(info); | |
818 | break; | |
819 | default: | |
820 | /* unknown work item ID */ | |
821 | printk("Unknown work item ID=%08X!\n", action); | |
822 | break; | |
823 | } | |
824 | } | |
825 | ||
eeb46134 | 826 | tty_kref_put(tty); |
1da177e4 LT |
827 | if (debug_level >= DEBUG_LEVEL_BH) |
828 | printk( "%s(%d):bh_handler(%s) exit\n", | |
829 | __FILE__,__LINE__,info->device_name); | |
830 | } | |
831 | ||
eeb46134 | 832 | static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 | 833 | { |
1da177e4 LT |
834 | if (debug_level >= DEBUG_LEVEL_BH) |
835 | printk("bh_transmit() entry on %s\n", info->device_name); | |
836 | ||
b963a844 | 837 | if (tty) |
1da177e4 | 838 | tty_wakeup(tty); |
1da177e4 LT |
839 | } |
840 | ||
cdaad343 | 841 | static void bh_status(MGSLPC_INFO *info) |
1da177e4 LT |
842 | { |
843 | info->ri_chkcount = 0; | |
844 | info->dsr_chkcount = 0; | |
845 | info->dcd_chkcount = 0; | |
846 | info->cts_chkcount = 0; | |
847 | } | |
848 | ||
d12341f9 | 849 | /* eom: non-zero = end of frame */ |
1da177e4 LT |
850 | static void rx_ready_hdlc(MGSLPC_INFO *info, int eom) |
851 | { | |
852 | unsigned char data[2]; | |
853 | unsigned char fifo_count, read_count, i; | |
854 | RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size)); | |
855 | ||
856 | if (debug_level >= DEBUG_LEVEL_ISR) | |
857 | printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom); | |
d12341f9 | 858 | |
1da177e4 LT |
859 | if (!info->rx_enabled) |
860 | return; | |
861 | ||
862 | if (info->rx_frame_count >= info->rx_buf_count) { | |
863 | /* no more free buffers */ | |
864 | issue_command(info, CHA, CMD_RXRESET); | |
865 | info->pending_bh |= BH_RECEIVE; | |
0fab6de0 | 866 | info->rx_overflow = true; |
1da177e4 LT |
867 | info->icount.buf_overrun++; |
868 | return; | |
869 | } | |
870 | ||
871 | if (eom) { | |
d12341f9 | 872 | /* end of frame, get FIFO count from RBCL register */ |
1da177e4 LT |
873 | if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f))) |
874 | fifo_count = 32; | |
875 | } else | |
876 | fifo_count = 32; | |
d12341f9 | 877 | |
1da177e4 LT |
878 | do { |
879 | if (fifo_count == 1) { | |
880 | read_count = 1; | |
881 | data[0] = read_reg(info, CHA + RXFIFO); | |
882 | } else { | |
883 | read_count = 2; | |
884 | *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO); | |
885 | } | |
886 | fifo_count -= read_count; | |
887 | if (!fifo_count && eom) | |
888 | buf->status = data[--read_count]; | |
889 | ||
890 | for (i = 0; i < read_count; i++) { | |
891 | if (buf->count >= info->max_frame_size) { | |
892 | /* frame too large, reset receiver and reset current buffer */ | |
893 | issue_command(info, CHA, CMD_RXRESET); | |
894 | buf->count = 0; | |
895 | return; | |
896 | } | |
897 | *(buf->data + buf->count) = data[i]; | |
898 | buf->count++; | |
899 | } | |
900 | } while (fifo_count); | |
901 | ||
902 | if (eom) { | |
903 | info->pending_bh |= BH_RECEIVE; | |
904 | info->rx_frame_count++; | |
905 | info->rx_put++; | |
906 | if (info->rx_put >= info->rx_buf_count) | |
907 | info->rx_put = 0; | |
908 | } | |
909 | issue_command(info, CHA, CMD_RXFIFO); | |
910 | } | |
911 | ||
eeb46134 | 912 | static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty) |
1da177e4 | 913 | { |
33f0f88f | 914 | unsigned char data, status, flag; |
1da177e4 | 915 | int fifo_count; |
33f0f88f | 916 | int work = 0; |
1da177e4 LT |
917 | struct mgsl_icount *icount = &info->icount; |
918 | ||
919 | if (tcd) { | |
d12341f9 | 920 | /* early termination, get FIFO count from RBCL register */ |
1da177e4 LT |
921 | fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); |
922 | ||
923 | /* Zero fifo count could mean 0 or 32 bytes available. | |
924 | * If BIT5 of STAR is set then at least 1 byte is available. | |
925 | */ | |
926 | if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5)) | |
927 | fifo_count = 32; | |
928 | } else | |
929 | fifo_count = 32; | |
33f0f88f AC |
930 | |
931 | tty_buffer_request_room(tty, fifo_count); | |
d12341f9 | 932 | /* Flush received async data to receive data buffer. */ |
1da177e4 LT |
933 | while (fifo_count) { |
934 | data = read_reg(info, CHA + RXFIFO); | |
935 | status = read_reg(info, CHA + RXFIFO); | |
936 | fifo_count -= 2; | |
937 | ||
1da177e4 | 938 | icount->rx++; |
33f0f88f | 939 | flag = TTY_NORMAL; |
1da177e4 LT |
940 | |
941 | // if no frameing/crc error then save data | |
942 | // BIT7:parity error | |
943 | // BIT6:framing error | |
944 | ||
945 | if (status & (BIT7 + BIT6)) { | |
d12341f9 | 946 | if (status & BIT7) |
1da177e4 LT |
947 | icount->parity++; |
948 | else | |
949 | icount->frame++; | |
950 | ||
951 | /* discard char if tty control flags say so */ | |
952 | if (status & info->ignore_status_mask) | |
953 | continue; | |
d12341f9 | 954 | |
1da177e4 LT |
955 | status &= info->read_status_mask; |
956 | ||
957 | if (status & BIT7) | |
33f0f88f | 958 | flag = TTY_PARITY; |
1da177e4 | 959 | else if (status & BIT6) |
33f0f88f | 960 | flag = TTY_FRAME; |
1da177e4 | 961 | } |
33f0f88f | 962 | work += tty_insert_flip_char(tty, data, flag); |
1da177e4 LT |
963 | } |
964 | issue_command(info, CHA, CMD_RXFIFO); | |
965 | ||
966 | if (debug_level >= DEBUG_LEVEL_ISR) { | |
33f0f88f AC |
967 | printk("%s(%d):rx_ready_async", |
968 | __FILE__,__LINE__); | |
1da177e4 LT |
969 | printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
970 | __FILE__,__LINE__,icount->rx,icount->brk, | |
971 | icount->parity,icount->frame,icount->overrun); | |
972 | } | |
d12341f9 | 973 | |
33f0f88f | 974 | if (work) |
1da177e4 LT |
975 | tty_flip_buffer_push(tty); |
976 | } | |
977 | ||
978 | ||
eeb46134 | 979 | static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
980 | { |
981 | if (!info->tx_active) | |
982 | return; | |
d12341f9 | 983 | |
0fab6de0 JP |
984 | info->tx_active = false; |
985 | info->tx_aborting = false; | |
1da177e4 LT |
986 | |
987 | if (info->params.mode == MGSL_MODE_ASYNC) | |
988 | return; | |
989 | ||
990 | info->tx_count = info->tx_put = info->tx_get = 0; | |
d12341f9 JG |
991 | del_timer(&info->tx_timer); |
992 | ||
1da177e4 LT |
993 | if (info->drop_rts_on_tx_done) { |
994 | get_signals(info); | |
995 | if (info->serial_signals & SerialSignal_RTS) { | |
996 | info->serial_signals &= ~SerialSignal_RTS; | |
997 | set_signals(info); | |
998 | } | |
0fab6de0 | 999 | info->drop_rts_on_tx_done = false; |
1da177e4 LT |
1000 | } |
1001 | ||
af69c7f9 | 1002 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
1003 | if (info->netcount) |
1004 | hdlcdev_tx_done(info); | |
d12341f9 | 1005 | else |
1da177e4 LT |
1006 | #endif |
1007 | { | |
eeb46134 | 1008 | if (tty->stopped || tty->hw_stopped) { |
1da177e4 LT |
1009 | tx_stop(info); |
1010 | return; | |
1011 | } | |
1012 | info->pending_bh |= BH_TRANSMIT; | |
1013 | } | |
1014 | } | |
1015 | ||
eeb46134 | 1016 | static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1017 | { |
1018 | unsigned char fifo_count = 32; | |
1019 | int c; | |
1020 | ||
1021 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1022 | printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name); | |
1023 | ||
1024 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1025 | if (!info->tx_active) | |
1026 | return; | |
1027 | } else { | |
eeb46134 | 1028 | if (tty->stopped || tty->hw_stopped) { |
1da177e4 LT |
1029 | tx_stop(info); |
1030 | return; | |
1031 | } | |
1032 | if (!info->tx_count) | |
0fab6de0 | 1033 | info->tx_active = false; |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | if (!info->tx_count) | |
1037 | return; | |
1038 | ||
1039 | while (info->tx_count && fifo_count) { | |
1040 | c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get))); | |
d12341f9 | 1041 | |
1da177e4 LT |
1042 | if (c == 1) { |
1043 | write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get)); | |
1044 | } else { | |
1045 | write_reg16(info, CHA + TXFIFO, | |
1046 | *((unsigned short*)(info->tx_buf + info->tx_get))); | |
1047 | } | |
1048 | info->tx_count -= c; | |
1049 | info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1); | |
1050 | fifo_count -= c; | |
1051 | } | |
1052 | ||
1053 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
1054 | if (info->tx_count < WAKEUP_CHARS) | |
1055 | info->pending_bh |= BH_TRANSMIT; | |
1056 | issue_command(info, CHA, CMD_TXFIFO); | |
1057 | } else { | |
1058 | if (info->tx_count) | |
1059 | issue_command(info, CHA, CMD_TXFIFO); | |
1060 | else | |
1061 | issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM); | |
1062 | } | |
1063 | } | |
1064 | ||
eeb46134 | 1065 | static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1066 | { |
1067 | get_signals(info); | |
1068 | if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1069 | irq_disable(info, CHB, IRQ_CTS); | |
1070 | info->icount.cts++; | |
1071 | if (info->serial_signals & SerialSignal_CTS) | |
1072 | info->input_signal_events.cts_up++; | |
1073 | else | |
1074 | info->input_signal_events.cts_down++; | |
1075 | wake_up_interruptible(&info->status_event_wait_q); | |
1076 | wake_up_interruptible(&info->event_wait_q); | |
1077 | ||
eeb46134 AC |
1078 | if (info->port.flags & ASYNC_CTS_FLOW) { |
1079 | if (tty->hw_stopped) { | |
1da177e4 LT |
1080 | if (info->serial_signals & SerialSignal_CTS) { |
1081 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1082 | printk("CTS tx start..."); | |
eeb46134 AC |
1083 | if (tty) |
1084 | tty->hw_stopped = 0; | |
1085 | tx_start(info, tty); | |
1da177e4 LT |
1086 | info->pending_bh |= BH_TRANSMIT; |
1087 | return; | |
1088 | } | |
1089 | } else { | |
1090 | if (!(info->serial_signals & SerialSignal_CTS)) { | |
1091 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1092 | printk("CTS tx stop..."); | |
eeb46134 AC |
1093 | if (tty) |
1094 | tty->hw_stopped = 1; | |
1da177e4 LT |
1095 | tx_stop(info); |
1096 | } | |
1097 | } | |
1098 | } | |
1099 | info->pending_bh |= BH_STATUS; | |
1100 | } | |
1101 | ||
eeb46134 | 1102 | static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1103 | { |
1104 | get_signals(info); | |
1105 | if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1106 | irq_disable(info, CHB, IRQ_DCD); | |
1107 | info->icount.dcd++; | |
1108 | if (info->serial_signals & SerialSignal_DCD) { | |
1109 | info->input_signal_events.dcd_up++; | |
1110 | } | |
1111 | else | |
1112 | info->input_signal_events.dcd_down++; | |
af69c7f9 | 1113 | #if SYNCLINK_GENERIC_HDLC |
fbeff3c1 KH |
1114 | if (info->netcount) { |
1115 | if (info->serial_signals & SerialSignal_DCD) | |
1116 | netif_carrier_on(info->netdev); | |
1117 | else | |
1118 | netif_carrier_off(info->netdev); | |
1119 | } | |
1da177e4 LT |
1120 | #endif |
1121 | wake_up_interruptible(&info->status_event_wait_q); | |
1122 | wake_up_interruptible(&info->event_wait_q); | |
1123 | ||
eeb46134 | 1124 | if (info->port.flags & ASYNC_CHECK_CD) { |
1da177e4 LT |
1125 | if (debug_level >= DEBUG_LEVEL_ISR) |
1126 | printk("%s CD now %s...", info->device_name, | |
1127 | (info->serial_signals & SerialSignal_DCD) ? "on" : "off"); | |
1128 | if (info->serial_signals & SerialSignal_DCD) | |
eeb46134 | 1129 | wake_up_interruptible(&info->port.open_wait); |
1da177e4 LT |
1130 | else { |
1131 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1132 | printk("doing serial hangup..."); | |
eeb46134 AC |
1133 | if (tty) |
1134 | tty_hangup(tty); | |
1da177e4 LT |
1135 | } |
1136 | } | |
1137 | info->pending_bh |= BH_STATUS; | |
1138 | } | |
1139 | ||
1140 | static void dsr_change(MGSLPC_INFO *info) | |
1141 | { | |
1142 | get_signals(info); | |
1143 | if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1144 | port_irq_disable(info, PVR_DSR); | |
1145 | info->icount.dsr++; | |
1146 | if (info->serial_signals & SerialSignal_DSR) | |
1147 | info->input_signal_events.dsr_up++; | |
1148 | else | |
1149 | info->input_signal_events.dsr_down++; | |
1150 | wake_up_interruptible(&info->status_event_wait_q); | |
1151 | wake_up_interruptible(&info->event_wait_q); | |
1152 | info->pending_bh |= BH_STATUS; | |
1153 | } | |
1154 | ||
1155 | static void ri_change(MGSLPC_INFO *info) | |
1156 | { | |
1157 | get_signals(info); | |
1158 | if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1159 | port_irq_disable(info, PVR_RI); | |
1160 | info->icount.rng++; | |
1161 | if (info->serial_signals & SerialSignal_RI) | |
1162 | info->input_signal_events.ri_up++; | |
1163 | else | |
1164 | info->input_signal_events.ri_down++; | |
1165 | wake_up_interruptible(&info->status_event_wait_q); | |
1166 | wake_up_interruptible(&info->event_wait_q); | |
1167 | info->pending_bh |= BH_STATUS; | |
1168 | } | |
1169 | ||
1170 | /* Interrupt service routine entry point. | |
d12341f9 | 1171 | * |
1da177e4 | 1172 | * Arguments: |
d12341f9 | 1173 | * |
1da177e4 LT |
1174 | * irq interrupt number that caused interrupt |
1175 | * dev_id device ID supplied during interrupt registration | |
1da177e4 | 1176 | */ |
a6f97b29 | 1177 | static irqreturn_t mgslpc_isr(int dummy, void *dev_id) |
1da177e4 | 1178 | { |
a6f97b29 | 1179 | MGSLPC_INFO *info = dev_id; |
eeb46134 | 1180 | struct tty_struct *tty; |
1da177e4 LT |
1181 | unsigned short isr; |
1182 | unsigned char gis, pis; | |
1183 | int count=0; | |
1184 | ||
d12341f9 | 1185 | if (debug_level >= DEBUG_LEVEL_ISR) |
a6f97b29 | 1186 | printk("mgslpc_isr(%d) entry.\n", info->irq_level); |
d12341f9 | 1187 | |
e2d40963 | 1188 | if (!(info->p_dev->_locked)) |
1da177e4 LT |
1189 | return IRQ_HANDLED; |
1190 | ||
eeb46134 AC |
1191 | tty = tty_port_tty_get(&info->port); |
1192 | ||
1da177e4 LT |
1193 | spin_lock(&info->lock); |
1194 | ||
1195 | while ((gis = read_reg(info, CHA + GIS))) { | |
d12341f9 | 1196 | if (debug_level >= DEBUG_LEVEL_ISR) |
1da177e4 LT |
1197 | printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis); |
1198 | ||
1199 | if ((gis & 0x70) || count > 1000) { | |
1200 | printk("synclink_cs:hardware failed or ejected\n"); | |
1201 | break; | |
1202 | } | |
1203 | count++; | |
1204 | ||
1205 | if (gis & (BIT1 + BIT0)) { | |
1206 | isr = read_reg16(info, CHB + ISR); | |
1207 | if (isr & IRQ_DCD) | |
eeb46134 | 1208 | dcd_change(info, tty); |
1da177e4 | 1209 | if (isr & IRQ_CTS) |
eeb46134 | 1210 | cts_change(info, tty); |
1da177e4 LT |
1211 | } |
1212 | if (gis & (BIT3 + BIT2)) | |
1213 | { | |
1214 | isr = read_reg16(info, CHA + ISR); | |
1215 | if (isr & IRQ_TIMER) { | |
0fab6de0 | 1216 | info->irq_occurred = true; |
1da177e4 LT |
1217 | irq_disable(info, CHA, IRQ_TIMER); |
1218 | } | |
1219 | ||
d12341f9 | 1220 | /* receive IRQs */ |
1da177e4 LT |
1221 | if (isr & IRQ_EXITHUNT) { |
1222 | info->icount.exithunt++; | |
1223 | wake_up_interruptible(&info->event_wait_q); | |
1224 | } | |
1225 | if (isr & IRQ_BREAK_ON) { | |
1226 | info->icount.brk++; | |
eeb46134 AC |
1227 | if (info->port.flags & ASYNC_SAK) |
1228 | do_SAK(tty); | |
1da177e4 LT |
1229 | } |
1230 | if (isr & IRQ_RXTIME) { | |
1231 | issue_command(info, CHA, CMD_RXFIFO_READ); | |
1232 | } | |
1233 | if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) { | |
1234 | if (info->params.mode == MGSL_MODE_HDLC) | |
d12341f9 | 1235 | rx_ready_hdlc(info, isr & IRQ_RXEOM); |
1da177e4 | 1236 | else |
eeb46134 | 1237 | rx_ready_async(info, isr & IRQ_RXEOM, tty); |
1da177e4 LT |
1238 | } |
1239 | ||
d12341f9 | 1240 | /* transmit IRQs */ |
1da177e4 LT |
1241 | if (isr & IRQ_UNDERRUN) { |
1242 | if (info->tx_aborting) | |
1243 | info->icount.txabort++; | |
1244 | else | |
1245 | info->icount.txunder++; | |
eeb46134 | 1246 | tx_done(info, tty); |
1da177e4 LT |
1247 | } |
1248 | else if (isr & IRQ_ALLSENT) { | |
1249 | info->icount.txok++; | |
eeb46134 | 1250 | tx_done(info, tty); |
1da177e4 LT |
1251 | } |
1252 | else if (isr & IRQ_TXFIFO) | |
eeb46134 | 1253 | tx_ready(info, tty); |
1da177e4 LT |
1254 | } |
1255 | if (gis & BIT7) { | |
1256 | pis = read_reg(info, CHA + PIS); | |
1257 | if (pis & BIT1) | |
1258 | dsr_change(info); | |
1259 | if (pis & BIT2) | |
1260 | ri_change(info); | |
1261 | } | |
1262 | } | |
d12341f9 JG |
1263 | |
1264 | /* Request bottom half processing if there's something | |
1da177e4 LT |
1265 | * for it to do and the bh is not already running |
1266 | */ | |
1267 | ||
1268 | if (info->pending_bh && !info->bh_running && !info->bh_requested) { | |
d12341f9 | 1269 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
1da177e4 LT |
1270 | printk("%s(%d):%s queueing bh task.\n", |
1271 | __FILE__,__LINE__,info->device_name); | |
1272 | schedule_work(&info->task); | |
0fab6de0 | 1273 | info->bh_requested = true; |
1da177e4 LT |
1274 | } |
1275 | ||
1276 | spin_unlock(&info->lock); | |
eeb46134 | 1277 | tty_kref_put(tty); |
d12341f9 JG |
1278 | |
1279 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1da177e4 | 1280 | printk("%s(%d):mgslpc_isr(%d)exit.\n", |
a6f97b29 | 1281 | __FILE__, __LINE__, info->irq_level); |
1da177e4 LT |
1282 | |
1283 | return IRQ_HANDLED; | |
1284 | } | |
1285 | ||
1286 | /* Initialize and start device. | |
1287 | */ | |
eeb46134 | 1288 | static int startup(MGSLPC_INFO * info, struct tty_struct *tty) |
1da177e4 LT |
1289 | { |
1290 | int retval = 0; | |
d12341f9 | 1291 | |
1da177e4 LT |
1292 | if (debug_level >= DEBUG_LEVEL_INFO) |
1293 | printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name); | |
d12341f9 | 1294 | |
eeb46134 | 1295 | if (info->port.flags & ASYNC_INITIALIZED) |
1da177e4 | 1296 | return 0; |
d12341f9 | 1297 | |
1da177e4 LT |
1298 | if (!info->tx_buf) { |
1299 | /* allocate a page of memory for a transmit buffer */ | |
1300 | info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); | |
1301 | if (!info->tx_buf) { | |
1302 | printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", | |
1303 | __FILE__,__LINE__,info->device_name); | |
1304 | return -ENOMEM; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | info->pending_bh = 0; | |
d12341f9 | 1309 | |
a7482a2e PF |
1310 | memset(&info->icount, 0, sizeof(info->icount)); |
1311 | ||
40565f19 | 1312 | setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info); |
1da177e4 LT |
1313 | |
1314 | /* Allocate and claim adapter resources */ | |
1315 | retval = claim_resources(info); | |
d12341f9 | 1316 | |
1da177e4 LT |
1317 | /* perform existance check and diagnostics */ |
1318 | if ( !retval ) | |
1319 | retval = adapter_test(info); | |
d12341f9 | 1320 | |
1da177e4 | 1321 | if ( retval ) { |
eeb46134 AC |
1322 | if (capable(CAP_SYS_ADMIN) && tty) |
1323 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1da177e4 LT |
1324 | release_resources(info); |
1325 | return retval; | |
1326 | } | |
1327 | ||
1328 | /* program hardware for current parameters */ | |
eeb46134 | 1329 | mgslpc_change_params(info, tty); |
d12341f9 | 1330 | |
eeb46134 AC |
1331 | if (tty) |
1332 | clear_bit(TTY_IO_ERROR, &tty->flags); | |
1da177e4 | 1333 | |
eeb46134 | 1334 | info->port.flags |= ASYNC_INITIALIZED; |
d12341f9 | 1335 | |
1da177e4 LT |
1336 | return 0; |
1337 | } | |
1338 | ||
1339 | /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware | |
1340 | */ | |
eeb46134 | 1341 | static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty) |
1da177e4 LT |
1342 | { |
1343 | unsigned long flags; | |
d12341f9 | 1344 | |
eeb46134 | 1345 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
1da177e4 LT |
1346 | return; |
1347 | ||
1348 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1349 | printk("%s(%d):mgslpc_shutdown(%s)\n", | |
1350 | __FILE__,__LINE__, info->device_name ); | |
1351 | ||
1352 | /* clear status wait queue because status changes */ | |
1353 | /* can't happen after shutting down the hardware */ | |
1354 | wake_up_interruptible(&info->status_event_wait_q); | |
1355 | wake_up_interruptible(&info->event_wait_q); | |
1356 | ||
40565f19 | 1357 | del_timer_sync(&info->tx_timer); |
1da177e4 LT |
1358 | |
1359 | if (info->tx_buf) { | |
1360 | free_page((unsigned long) info->tx_buf); | |
1361 | info->tx_buf = NULL; | |
1362 | } | |
1363 | ||
1364 | spin_lock_irqsave(&info->lock,flags); | |
1365 | ||
1366 | rx_stop(info); | |
1367 | tx_stop(info); | |
1368 | ||
1369 | /* TODO:disable interrupts instead of reset to preserve signal states */ | |
1370 | reset_device(info); | |
d12341f9 | 1371 | |
eeb46134 | 1372 | if (!tty || tty->termios->c_cflag & HUPCL) { |
1da177e4 LT |
1373 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
1374 | set_signals(info); | |
1375 | } | |
d12341f9 | 1376 | |
1da177e4 LT |
1377 | spin_unlock_irqrestore(&info->lock,flags); |
1378 | ||
d12341f9 JG |
1379 | release_resources(info); |
1380 | ||
eeb46134 AC |
1381 | if (tty) |
1382 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1da177e4 | 1383 | |
eeb46134 | 1384 | info->port.flags &= ~ASYNC_INITIALIZED; |
1da177e4 LT |
1385 | } |
1386 | ||
eeb46134 | 1387 | static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1388 | { |
1389 | unsigned long flags; | |
1390 | ||
1391 | spin_lock_irqsave(&info->lock,flags); | |
d12341f9 | 1392 | |
1da177e4 LT |
1393 | rx_stop(info); |
1394 | tx_stop(info); | |
1395 | info->tx_count = info->tx_put = info->tx_get = 0; | |
d12341f9 | 1396 | |
1da177e4 LT |
1397 | if (info->params.mode == MGSL_MODE_HDLC || info->netcount) |
1398 | hdlc_mode(info); | |
1399 | else | |
1400 | async_mode(info); | |
d12341f9 | 1401 | |
1da177e4 | 1402 | set_signals(info); |
d12341f9 | 1403 | |
1da177e4 LT |
1404 | info->dcd_chkcount = 0; |
1405 | info->cts_chkcount = 0; | |
1406 | info->ri_chkcount = 0; | |
1407 | info->dsr_chkcount = 0; | |
1408 | ||
1409 | irq_enable(info, CHB, IRQ_DCD | IRQ_CTS); | |
1410 | port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); | |
1411 | get_signals(info); | |
d12341f9 | 1412 | |
eeb46134 | 1413 | if (info->netcount || (tty && (tty->termios->c_cflag & CREAD))) |
1da177e4 | 1414 | rx_start(info); |
d12341f9 | 1415 | |
1da177e4 LT |
1416 | spin_unlock_irqrestore(&info->lock,flags); |
1417 | } | |
1418 | ||
1419 | /* Reconfigure adapter based on new parameters | |
1420 | */ | |
eeb46134 | 1421 | static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1422 | { |
1423 | unsigned cflag; | |
1424 | int bits_per_char; | |
1425 | ||
eeb46134 | 1426 | if (!tty || !tty->termios) |
1da177e4 | 1427 | return; |
d12341f9 | 1428 | |
1da177e4 LT |
1429 | if (debug_level >= DEBUG_LEVEL_INFO) |
1430 | printk("%s(%d):mgslpc_change_params(%s)\n", | |
1431 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 1432 | |
eeb46134 | 1433 | cflag = tty->termios->c_cflag; |
1da177e4 LT |
1434 | |
1435 | /* if B0 rate (hangup) specified then negate DTR and RTS */ | |
1436 | /* otherwise assert DTR and RTS */ | |
1437 | if (cflag & CBAUD) | |
1438 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
1439 | else | |
1440 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
d12341f9 | 1441 | |
1da177e4 | 1442 | /* byte size and parity */ |
d12341f9 | 1443 | |
1da177e4 LT |
1444 | switch (cflag & CSIZE) { |
1445 | case CS5: info->params.data_bits = 5; break; | |
1446 | case CS6: info->params.data_bits = 6; break; | |
1447 | case CS7: info->params.data_bits = 7; break; | |
1448 | case CS8: info->params.data_bits = 8; break; | |
1449 | default: info->params.data_bits = 7; break; | |
1450 | } | |
d12341f9 | 1451 | |
1da177e4 LT |
1452 | if (cflag & CSTOPB) |
1453 | info->params.stop_bits = 2; | |
1454 | else | |
1455 | info->params.stop_bits = 1; | |
1456 | ||
1457 | info->params.parity = ASYNC_PARITY_NONE; | |
1458 | if (cflag & PARENB) { | |
1459 | if (cflag & PARODD) | |
1460 | info->params.parity = ASYNC_PARITY_ODD; | |
1461 | else | |
1462 | info->params.parity = ASYNC_PARITY_EVEN; | |
1463 | #ifdef CMSPAR | |
1464 | if (cflag & CMSPAR) | |
1465 | info->params.parity = ASYNC_PARITY_SPACE; | |
1466 | #endif | |
1467 | } | |
1468 | ||
1469 | /* calculate number of jiffies to transmit a full | |
1470 | * FIFO (32 bytes) at specified data rate | |
1471 | */ | |
d12341f9 | 1472 | bits_per_char = info->params.data_bits + |
1da177e4 LT |
1473 | info->params.stop_bits + 1; |
1474 | ||
1475 | /* if port data rate is set to 460800 or less then | |
1476 | * allow tty settings to override, otherwise keep the | |
1477 | * current data rate. | |
1478 | */ | |
1479 | if (info->params.data_rate <= 460800) { | |
eeb46134 | 1480 | info->params.data_rate = tty_get_baud_rate(tty); |
1da177e4 | 1481 | } |
d12341f9 | 1482 | |
1da177e4 | 1483 | if ( info->params.data_rate ) { |
d12341f9 | 1484 | info->timeout = (32*HZ*bits_per_char) / |
1da177e4 LT |
1485 | info->params.data_rate; |
1486 | } | |
1487 | info->timeout += HZ/50; /* Add .02 seconds of slop */ | |
1488 | ||
1489 | if (cflag & CRTSCTS) | |
eeb46134 | 1490 | info->port.flags |= ASYNC_CTS_FLOW; |
1da177e4 | 1491 | else |
eeb46134 | 1492 | info->port.flags &= ~ASYNC_CTS_FLOW; |
d12341f9 | 1493 | |
1da177e4 | 1494 | if (cflag & CLOCAL) |
eeb46134 | 1495 | info->port.flags &= ~ASYNC_CHECK_CD; |
1da177e4 | 1496 | else |
eeb46134 | 1497 | info->port.flags |= ASYNC_CHECK_CD; |
1da177e4 LT |
1498 | |
1499 | /* process tty input control flags */ | |
d12341f9 | 1500 | |
1da177e4 | 1501 | info->read_status_mask = 0; |
eeb46134 | 1502 | if (I_INPCK(tty)) |
1da177e4 | 1503 | info->read_status_mask |= BIT7 | BIT6; |
eeb46134 | 1504 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1505 | info->ignore_status_mask |= BIT7 | BIT6; |
1506 | ||
eeb46134 | 1507 | mgslpc_program_hw(info, tty); |
1da177e4 LT |
1508 | } |
1509 | ||
1510 | /* Add a character to the transmit buffer | |
1511 | */ | |
d7e752e2 | 1512 | static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1513 | { |
1514 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1515 | unsigned long flags; | |
1516 | ||
1517 | if (debug_level >= DEBUG_LEVEL_INFO) { | |
1518 | printk( "%s(%d):mgslpc_put_char(%d) on %s\n", | |
1519 | __FILE__,__LINE__,ch,info->device_name); | |
1520 | } | |
1521 | ||
1522 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char")) | |
d7e752e2 | 1523 | return 0; |
1da177e4 | 1524 | |
326f28e9 | 1525 | if (!info->tx_buf) |
d7e752e2 | 1526 | return 0; |
1da177e4 LT |
1527 | |
1528 | spin_lock_irqsave(&info->lock,flags); | |
d12341f9 | 1529 | |
1da177e4 LT |
1530 | if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) { |
1531 | if (info->tx_count < TXBUFSIZE - 1) { | |
1532 | info->tx_buf[info->tx_put++] = ch; | |
1533 | info->tx_put &= TXBUFSIZE-1; | |
1534 | info->tx_count++; | |
1535 | } | |
1536 | } | |
d12341f9 | 1537 | |
1da177e4 | 1538 | spin_unlock_irqrestore(&info->lock,flags); |
d7e752e2 | 1539 | return 1; |
1da177e4 LT |
1540 | } |
1541 | ||
1542 | /* Enable transmitter so remaining characters in the | |
1543 | * transmit buffer are sent. | |
1544 | */ | |
1545 | static void mgslpc_flush_chars(struct tty_struct *tty) | |
1546 | { | |
1547 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1548 | unsigned long flags; | |
d12341f9 | 1549 | |
1da177e4 LT |
1550 | if (debug_level >= DEBUG_LEVEL_INFO) |
1551 | printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n", | |
1552 | __FILE__,__LINE__,info->device_name,info->tx_count); | |
d12341f9 | 1553 | |
1da177e4 LT |
1554 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars")) |
1555 | return; | |
1556 | ||
1557 | if (info->tx_count <= 0 || tty->stopped || | |
1558 | tty->hw_stopped || !info->tx_buf) | |
1559 | return; | |
1560 | ||
1561 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1562 | printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n", | |
1563 | __FILE__,__LINE__,info->device_name); | |
1564 | ||
1565 | spin_lock_irqsave(&info->lock,flags); | |
1566 | if (!info->tx_active) | |
eeb46134 | 1567 | tx_start(info, tty); |
1da177e4 LT |
1568 | spin_unlock_irqrestore(&info->lock,flags); |
1569 | } | |
1570 | ||
1571 | /* Send a block of data | |
d12341f9 | 1572 | * |
1da177e4 | 1573 | * Arguments: |
d12341f9 | 1574 | * |
1da177e4 LT |
1575 | * tty pointer to tty information structure |
1576 | * buf pointer to buffer containing send data | |
1577 | * count size of send data in bytes | |
d12341f9 | 1578 | * |
1da177e4 LT |
1579 | * Returns: number of characters written |
1580 | */ | |
1581 | static int mgslpc_write(struct tty_struct * tty, | |
1582 | const unsigned char *buf, int count) | |
1583 | { | |
1584 | int c, ret = 0; | |
1585 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1586 | unsigned long flags; | |
d12341f9 | 1587 | |
1da177e4 LT |
1588 | if (debug_level >= DEBUG_LEVEL_INFO) |
1589 | printk( "%s(%d):mgslpc_write(%s) count=%d\n", | |
1590 | __FILE__,__LINE__,info->device_name,count); | |
d12341f9 | 1591 | |
1da177e4 | 1592 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") || |
326f28e9 | 1593 | !info->tx_buf) |
1da177e4 LT |
1594 | goto cleanup; |
1595 | ||
1596 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1597 | if (count > TXBUFSIZE) { | |
1598 | ret = -EIO; | |
1599 | goto cleanup; | |
1600 | } | |
1601 | if (info->tx_active) | |
1602 | goto cleanup; | |
1603 | else if (info->tx_count) | |
1604 | goto start; | |
1605 | } | |
1606 | ||
1607 | for (;;) { | |
1608 | c = min(count, | |
1609 | min(TXBUFSIZE - info->tx_count - 1, | |
1610 | TXBUFSIZE - info->tx_put)); | |
1611 | if (c <= 0) | |
1612 | break; | |
d12341f9 | 1613 | |
1da177e4 LT |
1614 | memcpy(info->tx_buf + info->tx_put, buf, c); |
1615 | ||
1616 | spin_lock_irqsave(&info->lock,flags); | |
1617 | info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1); | |
1618 | info->tx_count += c; | |
1619 | spin_unlock_irqrestore(&info->lock,flags); | |
1620 | ||
1621 | buf += c; | |
1622 | count -= c; | |
1623 | ret += c; | |
1624 | } | |
1625 | start: | |
1626 | if (info->tx_count && !tty->stopped && !tty->hw_stopped) { | |
1627 | spin_lock_irqsave(&info->lock,flags); | |
1628 | if (!info->tx_active) | |
eeb46134 | 1629 | tx_start(info, tty); |
1da177e4 LT |
1630 | spin_unlock_irqrestore(&info->lock,flags); |
1631 | } | |
d12341f9 | 1632 | cleanup: |
1da177e4 LT |
1633 | if (debug_level >= DEBUG_LEVEL_INFO) |
1634 | printk( "%s(%d):mgslpc_write(%s) returning=%d\n", | |
1635 | __FILE__,__LINE__,info->device_name,ret); | |
1636 | return ret; | |
1637 | } | |
1638 | ||
1639 | /* Return the count of free bytes in transmit buffer | |
1640 | */ | |
1641 | static int mgslpc_write_room(struct tty_struct *tty) | |
1642 | { | |
1643 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1644 | int ret; | |
d12341f9 | 1645 | |
1da177e4 LT |
1646 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room")) |
1647 | return 0; | |
1648 | ||
1649 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1650 | /* HDLC (frame oriented) mode */ | |
1651 | if (info->tx_active) | |
1652 | return 0; | |
1653 | else | |
1654 | return HDLC_MAX_FRAME_SIZE; | |
1655 | } else { | |
1656 | ret = TXBUFSIZE - info->tx_count - 1; | |
1657 | if (ret < 0) | |
1658 | ret = 0; | |
1659 | } | |
d12341f9 | 1660 | |
1da177e4 LT |
1661 | if (debug_level >= DEBUG_LEVEL_INFO) |
1662 | printk("%s(%d):mgslpc_write_room(%s)=%d\n", | |
1663 | __FILE__,__LINE__, info->device_name, ret); | |
1664 | return ret; | |
1665 | } | |
1666 | ||
1667 | /* Return the count of bytes in transmit buffer | |
1668 | */ | |
1669 | static int mgslpc_chars_in_buffer(struct tty_struct *tty) | |
1670 | { | |
1671 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1672 | int rc; | |
d12341f9 | 1673 | |
1da177e4 LT |
1674 | if (debug_level >= DEBUG_LEVEL_INFO) |
1675 | printk("%s(%d):mgslpc_chars_in_buffer(%s)\n", | |
1676 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 1677 | |
1da177e4 LT |
1678 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer")) |
1679 | return 0; | |
d12341f9 | 1680 | |
1da177e4 LT |
1681 | if (info->params.mode == MGSL_MODE_HDLC) |
1682 | rc = info->tx_active ? info->max_frame_size : 0; | |
1683 | else | |
1684 | rc = info->tx_count; | |
1685 | ||
1686 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1687 | printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n", | |
1688 | __FILE__,__LINE__, info->device_name, rc); | |
d12341f9 | 1689 | |
1da177e4 LT |
1690 | return rc; |
1691 | } | |
1692 | ||
1693 | /* Discard all data in the send buffer | |
1694 | */ | |
1695 | static void mgslpc_flush_buffer(struct tty_struct *tty) | |
1696 | { | |
1697 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1698 | unsigned long flags; | |
d12341f9 | 1699 | |
1da177e4 LT |
1700 | if (debug_level >= DEBUG_LEVEL_INFO) |
1701 | printk("%s(%d):mgslpc_flush_buffer(%s) entry\n", | |
1702 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 1703 | |
1da177e4 LT |
1704 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer")) |
1705 | return; | |
d12341f9 JG |
1706 | |
1707 | spin_lock_irqsave(&info->lock,flags); | |
1da177e4 | 1708 | info->tx_count = info->tx_put = info->tx_get = 0; |
d12341f9 | 1709 | del_timer(&info->tx_timer); |
1da177e4 LT |
1710 | spin_unlock_irqrestore(&info->lock,flags); |
1711 | ||
1712 | wake_up_interruptible(&tty->write_wait); | |
1713 | tty_wakeup(tty); | |
1714 | } | |
1715 | ||
1716 | /* Send a high-priority XON/XOFF character | |
1717 | */ | |
1718 | static void mgslpc_send_xchar(struct tty_struct *tty, char ch) | |
1719 | { | |
1720 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1721 | unsigned long flags; | |
1722 | ||
1723 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1724 | printk("%s(%d):mgslpc_send_xchar(%s,%d)\n", | |
1725 | __FILE__,__LINE__, info->device_name, ch ); | |
d12341f9 | 1726 | |
1da177e4 LT |
1727 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar")) |
1728 | return; | |
1729 | ||
1730 | info->x_char = ch; | |
1731 | if (ch) { | |
1732 | spin_lock_irqsave(&info->lock,flags); | |
1733 | if (!info->tx_enabled) | |
eeb46134 | 1734 | tx_start(info, tty); |
1da177e4 LT |
1735 | spin_unlock_irqrestore(&info->lock,flags); |
1736 | } | |
1737 | } | |
1738 | ||
1739 | /* Signal remote device to throttle send data (our receive data) | |
1740 | */ | |
1741 | static void mgslpc_throttle(struct tty_struct * tty) | |
1742 | { | |
1743 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1744 | unsigned long flags; | |
d12341f9 | 1745 | |
1da177e4 LT |
1746 | if (debug_level >= DEBUG_LEVEL_INFO) |
1747 | printk("%s(%d):mgslpc_throttle(%s) entry\n", | |
1748 | __FILE__,__LINE__, info->device_name ); | |
1749 | ||
1750 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle")) | |
1751 | return; | |
d12341f9 | 1752 | |
1da177e4 LT |
1753 | if (I_IXOFF(tty)) |
1754 | mgslpc_send_xchar(tty, STOP_CHAR(tty)); | |
d12341f9 | 1755 | |
1da177e4 LT |
1756 | if (tty->termios->c_cflag & CRTSCTS) { |
1757 | spin_lock_irqsave(&info->lock,flags); | |
1758 | info->serial_signals &= ~SerialSignal_RTS; | |
1759 | set_signals(info); | |
1760 | spin_unlock_irqrestore(&info->lock,flags); | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | /* Signal remote device to stop throttling send data (our receive data) | |
1765 | */ | |
1766 | static void mgslpc_unthrottle(struct tty_struct * tty) | |
1767 | { | |
1768 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1769 | unsigned long flags; | |
d12341f9 | 1770 | |
1da177e4 LT |
1771 | if (debug_level >= DEBUG_LEVEL_INFO) |
1772 | printk("%s(%d):mgslpc_unthrottle(%s) entry\n", | |
1773 | __FILE__,__LINE__, info->device_name ); | |
1774 | ||
1775 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle")) | |
1776 | return; | |
d12341f9 | 1777 | |
1da177e4 LT |
1778 | if (I_IXOFF(tty)) { |
1779 | if (info->x_char) | |
1780 | info->x_char = 0; | |
1781 | else | |
1782 | mgslpc_send_xchar(tty, START_CHAR(tty)); | |
1783 | } | |
d12341f9 | 1784 | |
1da177e4 LT |
1785 | if (tty->termios->c_cflag & CRTSCTS) { |
1786 | spin_lock_irqsave(&info->lock,flags); | |
1787 | info->serial_signals |= SerialSignal_RTS; | |
1788 | set_signals(info); | |
1789 | spin_unlock_irqrestore(&info->lock,flags); | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | /* get the current serial statistics | |
1794 | */ | |
1795 | static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount) | |
1796 | { | |
1797 | int err; | |
1798 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1799 | printk("get_params(%s)\n", info->device_name); | |
a7482a2e PF |
1800 | if (!user_icount) { |
1801 | memset(&info->icount, 0, sizeof(info->icount)); | |
1802 | } else { | |
1803 | COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); | |
1804 | if (err) | |
1805 | return -EFAULT; | |
1806 | } | |
1da177e4 LT |
1807 | return 0; |
1808 | } | |
1809 | ||
1810 | /* get the current serial parameters | |
1811 | */ | |
1812 | static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params) | |
1813 | { | |
1814 | int err; | |
1815 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1816 | printk("get_params(%s)\n", info->device_name); | |
1817 | COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); | |
1818 | if (err) | |
1819 | return -EFAULT; | |
1820 | return 0; | |
1821 | } | |
1822 | ||
1823 | /* set the serial parameters | |
d12341f9 | 1824 | * |
1da177e4 | 1825 | * Arguments: |
d12341f9 | 1826 | * |
1da177e4 LT |
1827 | * info pointer to device instance data |
1828 | * new_params user buffer containing new serial params | |
1829 | * | |
1830 | * Returns: 0 if success, otherwise error code | |
1831 | */ | |
eeb46134 | 1832 | static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty) |
1da177e4 LT |
1833 | { |
1834 | unsigned long flags; | |
1835 | MGSL_PARAMS tmp_params; | |
1836 | int err; | |
d12341f9 | 1837 | |
1da177e4 LT |
1838 | if (debug_level >= DEBUG_LEVEL_INFO) |
1839 | printk("%s(%d):set_params %s\n", __FILE__,__LINE__, | |
1840 | info->device_name ); | |
1841 | COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); | |
1842 | if (err) { | |
1843 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1844 | printk( "%s(%d):set_params(%s) user buffer copy failed\n", | |
1845 | __FILE__,__LINE__,info->device_name); | |
1846 | return -EFAULT; | |
1847 | } | |
d12341f9 | 1848 | |
1da177e4 LT |
1849 | spin_lock_irqsave(&info->lock,flags); |
1850 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); | |
1851 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 1852 | |
eeb46134 | 1853 | mgslpc_change_params(info, tty); |
d12341f9 | 1854 | |
1da177e4 LT |
1855 | return 0; |
1856 | } | |
1857 | ||
1858 | static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode) | |
1859 | { | |
1860 | int err; | |
1861 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1862 | printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode); | |
1863 | COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); | |
1864 | if (err) | |
1865 | return -EFAULT; | |
1866 | return 0; | |
1867 | } | |
1868 | ||
1869 | static int set_txidle(MGSLPC_INFO * info, int idle_mode) | |
1870 | { | |
1871 | unsigned long flags; | |
1872 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1873 | printk("set_txidle(%s,%d)\n", info->device_name, idle_mode); | |
1874 | spin_lock_irqsave(&info->lock,flags); | |
1875 | info->idle_mode = idle_mode; | |
1876 | tx_set_idle(info); | |
1877 | spin_unlock_irqrestore(&info->lock,flags); | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | static int get_interface(MGSLPC_INFO * info, int __user *if_mode) | |
1882 | { | |
1883 | int err; | |
1884 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1885 | printk("get_interface(%s)=%d\n", info->device_name, info->if_mode); | |
1886 | COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int)); | |
1887 | if (err) | |
1888 | return -EFAULT; | |
1889 | return 0; | |
1890 | } | |
1891 | ||
1892 | static int set_interface(MGSLPC_INFO * info, int if_mode) | |
1893 | { | |
1894 | unsigned long flags; | |
1895 | unsigned char val; | |
1896 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1897 | printk("set_interface(%s,%d)\n", info->device_name, if_mode); | |
1898 | spin_lock_irqsave(&info->lock,flags); | |
1899 | info->if_mode = if_mode; | |
1900 | ||
1901 | val = read_reg(info, PVR) & 0x0f; | |
1902 | switch (info->if_mode) | |
1903 | { | |
1904 | case MGSL_INTERFACE_RS232: val |= PVR_RS232; break; | |
1905 | case MGSL_INTERFACE_V35: val |= PVR_V35; break; | |
1906 | case MGSL_INTERFACE_RS422: val |= PVR_RS422; break; | |
1907 | } | |
1908 | write_reg(info, PVR, val); | |
1909 | ||
1910 | spin_unlock_irqrestore(&info->lock,flags); | |
1911 | return 0; | |
1912 | } | |
1913 | ||
eeb46134 | 1914 | static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty) |
1da177e4 LT |
1915 | { |
1916 | unsigned long flags; | |
d12341f9 | 1917 | |
1da177e4 LT |
1918 | if (debug_level >= DEBUG_LEVEL_INFO) |
1919 | printk("set_txenable(%s,%d)\n", info->device_name, enable); | |
d12341f9 | 1920 | |
1da177e4 LT |
1921 | spin_lock_irqsave(&info->lock,flags); |
1922 | if (enable) { | |
1923 | if (!info->tx_enabled) | |
eeb46134 | 1924 | tx_start(info, tty); |
1da177e4 LT |
1925 | } else { |
1926 | if (info->tx_enabled) | |
1927 | tx_stop(info); | |
1928 | } | |
1929 | spin_unlock_irqrestore(&info->lock,flags); | |
1930 | return 0; | |
1931 | } | |
1932 | ||
1933 | static int tx_abort(MGSLPC_INFO * info) | |
1934 | { | |
1935 | unsigned long flags; | |
d12341f9 | 1936 | |
1da177e4 LT |
1937 | if (debug_level >= DEBUG_LEVEL_INFO) |
1938 | printk("tx_abort(%s)\n", info->device_name); | |
d12341f9 | 1939 | |
1da177e4 LT |
1940 | spin_lock_irqsave(&info->lock,flags); |
1941 | if (info->tx_active && info->tx_count && | |
1942 | info->params.mode == MGSL_MODE_HDLC) { | |
1943 | /* clear data count so FIFO is not filled on next IRQ. | |
1944 | * This results in underrun and abort transmission. | |
1945 | */ | |
1946 | info->tx_count = info->tx_put = info->tx_get = 0; | |
0fab6de0 | 1947 | info->tx_aborting = true; |
1da177e4 LT |
1948 | } |
1949 | spin_unlock_irqrestore(&info->lock,flags); | |
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | static int set_rxenable(MGSLPC_INFO * info, int enable) | |
1954 | { | |
1955 | unsigned long flags; | |
d12341f9 | 1956 | |
1da177e4 LT |
1957 | if (debug_level >= DEBUG_LEVEL_INFO) |
1958 | printk("set_rxenable(%s,%d)\n", info->device_name, enable); | |
d12341f9 | 1959 | |
1da177e4 LT |
1960 | spin_lock_irqsave(&info->lock,flags); |
1961 | if (enable) { | |
1962 | if (!info->rx_enabled) | |
1963 | rx_start(info); | |
1964 | } else { | |
1965 | if (info->rx_enabled) | |
1966 | rx_stop(info); | |
1967 | } | |
1968 | spin_unlock_irqrestore(&info->lock,flags); | |
1969 | return 0; | |
1970 | } | |
1971 | ||
1972 | /* wait for specified event to occur | |
d12341f9 | 1973 | * |
1da177e4 LT |
1974 | * Arguments: info pointer to device instance data |
1975 | * mask pointer to bitmask of events to wait for | |
1976 | * Return Value: 0 if successful and bit mask updated with | |
1977 | * of events triggerred, | |
1978 | * otherwise error code | |
1979 | */ | |
1980 | static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr) | |
1981 | { | |
1982 | unsigned long flags; | |
1983 | int s; | |
1984 | int rc=0; | |
1985 | struct mgsl_icount cprev, cnow; | |
1986 | int events; | |
1987 | int mask; | |
1988 | struct _input_signal_events oldsigs, newsigs; | |
1989 | DECLARE_WAITQUEUE(wait, current); | |
1990 | ||
1991 | COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); | |
1992 | if (rc) | |
1993 | return -EFAULT; | |
d12341f9 | 1994 | |
1da177e4 LT |
1995 | if (debug_level >= DEBUG_LEVEL_INFO) |
1996 | printk("wait_events(%s,%d)\n", info->device_name, mask); | |
1997 | ||
1998 | spin_lock_irqsave(&info->lock,flags); | |
1999 | ||
2000 | /* return immediately if state matches requested events */ | |
2001 | get_signals(info); | |
2002 | s = info->serial_signals; | |
2003 | events = mask & | |
2004 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + | |
2005 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + | |
2006 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + | |
2007 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); | |
2008 | if (events) { | |
2009 | spin_unlock_irqrestore(&info->lock,flags); | |
2010 | goto exit; | |
2011 | } | |
2012 | ||
2013 | /* save current irq counts */ | |
2014 | cprev = info->icount; | |
2015 | oldsigs = info->input_signal_events; | |
d12341f9 | 2016 | |
1da177e4 LT |
2017 | if ((info->params.mode == MGSL_MODE_HDLC) && |
2018 | (mask & MgslEvent_ExitHuntMode)) | |
2019 | irq_enable(info, CHA, IRQ_EXITHUNT); | |
d12341f9 | 2020 | |
1da177e4 LT |
2021 | set_current_state(TASK_INTERRUPTIBLE); |
2022 | add_wait_queue(&info->event_wait_q, &wait); | |
d12341f9 | 2023 | |
1da177e4 | 2024 | spin_unlock_irqrestore(&info->lock,flags); |
d12341f9 JG |
2025 | |
2026 | ||
1da177e4 LT |
2027 | for(;;) { |
2028 | schedule(); | |
2029 | if (signal_pending(current)) { | |
2030 | rc = -ERESTARTSYS; | |
2031 | break; | |
2032 | } | |
d12341f9 | 2033 | |
1da177e4 LT |
2034 | /* get current irq counts */ |
2035 | spin_lock_irqsave(&info->lock,flags); | |
2036 | cnow = info->icount; | |
2037 | newsigs = info->input_signal_events; | |
2038 | set_current_state(TASK_INTERRUPTIBLE); | |
2039 | spin_unlock_irqrestore(&info->lock,flags); | |
2040 | ||
2041 | /* if no change, wait aborted for some reason */ | |
2042 | if (newsigs.dsr_up == oldsigs.dsr_up && | |
2043 | newsigs.dsr_down == oldsigs.dsr_down && | |
2044 | newsigs.dcd_up == oldsigs.dcd_up && | |
2045 | newsigs.dcd_down == oldsigs.dcd_down && | |
2046 | newsigs.cts_up == oldsigs.cts_up && | |
2047 | newsigs.cts_down == oldsigs.cts_down && | |
2048 | newsigs.ri_up == oldsigs.ri_up && | |
2049 | newsigs.ri_down == oldsigs.ri_down && | |
2050 | cnow.exithunt == cprev.exithunt && | |
2051 | cnow.rxidle == cprev.rxidle) { | |
2052 | rc = -EIO; | |
2053 | break; | |
2054 | } | |
2055 | ||
2056 | events = mask & | |
2057 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + | |
2058 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + | |
2059 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + | |
2060 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + | |
2061 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + | |
2062 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + | |
2063 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + | |
2064 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + | |
2065 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + | |
2066 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); | |
2067 | if (events) | |
2068 | break; | |
d12341f9 | 2069 | |
1da177e4 LT |
2070 | cprev = cnow; |
2071 | oldsigs = newsigs; | |
2072 | } | |
d12341f9 | 2073 | |
1da177e4 LT |
2074 | remove_wait_queue(&info->event_wait_q, &wait); |
2075 | set_current_state(TASK_RUNNING); | |
2076 | ||
2077 | if (mask & MgslEvent_ExitHuntMode) { | |
2078 | spin_lock_irqsave(&info->lock,flags); | |
2079 | if (!waitqueue_active(&info->event_wait_q)) | |
2080 | irq_disable(info, CHA, IRQ_EXITHUNT); | |
2081 | spin_unlock_irqrestore(&info->lock,flags); | |
2082 | } | |
2083 | exit: | |
2084 | if (rc == 0) | |
2085 | PUT_USER(rc, events, mask_ptr); | |
2086 | return rc; | |
2087 | } | |
2088 | ||
2089 | static int modem_input_wait(MGSLPC_INFO *info,int arg) | |
2090 | { | |
2091 | unsigned long flags; | |
2092 | int rc; | |
2093 | struct mgsl_icount cprev, cnow; | |
2094 | DECLARE_WAITQUEUE(wait, current); | |
2095 | ||
2096 | /* save current irq counts */ | |
2097 | spin_lock_irqsave(&info->lock,flags); | |
2098 | cprev = info->icount; | |
2099 | add_wait_queue(&info->status_event_wait_q, &wait); | |
2100 | set_current_state(TASK_INTERRUPTIBLE); | |
2101 | spin_unlock_irqrestore(&info->lock,flags); | |
2102 | ||
2103 | for(;;) { | |
2104 | schedule(); | |
2105 | if (signal_pending(current)) { | |
2106 | rc = -ERESTARTSYS; | |
2107 | break; | |
2108 | } | |
2109 | ||
2110 | /* get new irq counts */ | |
2111 | spin_lock_irqsave(&info->lock,flags); | |
2112 | cnow = info->icount; | |
2113 | set_current_state(TASK_INTERRUPTIBLE); | |
2114 | spin_unlock_irqrestore(&info->lock,flags); | |
2115 | ||
2116 | /* if no change, wait aborted for some reason */ | |
2117 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
2118 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { | |
2119 | rc = -EIO; | |
2120 | break; | |
2121 | } | |
2122 | ||
2123 | /* check for change in caller specified modem input */ | |
2124 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || | |
2125 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || | |
2126 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || | |
2127 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { | |
2128 | rc = 0; | |
2129 | break; | |
2130 | } | |
2131 | ||
2132 | cprev = cnow; | |
2133 | } | |
2134 | remove_wait_queue(&info->status_event_wait_q, &wait); | |
2135 | set_current_state(TASK_RUNNING); | |
2136 | return rc; | |
2137 | } | |
2138 | ||
2139 | /* return the state of the serial control and status signals | |
2140 | */ | |
2141 | static int tiocmget(struct tty_struct *tty, struct file *file) | |
2142 | { | |
2143 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2144 | unsigned int result; | |
2145 | unsigned long flags; | |
2146 | ||
2147 | spin_lock_irqsave(&info->lock,flags); | |
2148 | get_signals(info); | |
2149 | spin_unlock_irqrestore(&info->lock,flags); | |
2150 | ||
2151 | result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + | |
2152 | ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + | |
2153 | ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + | |
2154 | ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + | |
2155 | ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + | |
2156 | ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); | |
2157 | ||
2158 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2159 | printk("%s(%d):%s tiocmget() value=%08X\n", | |
2160 | __FILE__,__LINE__, info->device_name, result ); | |
2161 | return result; | |
2162 | } | |
2163 | ||
2164 | /* set modem control signals (DTR/RTS) | |
2165 | */ | |
2166 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
2167 | unsigned int set, unsigned int clear) | |
2168 | { | |
2169 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2170 | unsigned long flags; | |
2171 | ||
2172 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2173 | printk("%s(%d):%s tiocmset(%x,%x)\n", | |
2174 | __FILE__,__LINE__,info->device_name, set, clear); | |
2175 | ||
2176 | if (set & TIOCM_RTS) | |
2177 | info->serial_signals |= SerialSignal_RTS; | |
2178 | if (set & TIOCM_DTR) | |
2179 | info->serial_signals |= SerialSignal_DTR; | |
2180 | if (clear & TIOCM_RTS) | |
2181 | info->serial_signals &= ~SerialSignal_RTS; | |
2182 | if (clear & TIOCM_DTR) | |
2183 | info->serial_signals &= ~SerialSignal_DTR; | |
2184 | ||
2185 | spin_lock_irqsave(&info->lock,flags); | |
2186 | set_signals(info); | |
2187 | spin_unlock_irqrestore(&info->lock,flags); | |
2188 | ||
2189 | return 0; | |
2190 | } | |
2191 | ||
2192 | /* Set or clear transmit break condition | |
2193 | * | |
2194 | * Arguments: tty pointer to tty instance data | |
2195 | * break_state -1=set break condition, 0=clear | |
2196 | */ | |
9e98966c | 2197 | static int mgslpc_break(struct tty_struct *tty, int break_state) |
1da177e4 LT |
2198 | { |
2199 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2200 | unsigned long flags; | |
d12341f9 | 2201 | |
1da177e4 LT |
2202 | if (debug_level >= DEBUG_LEVEL_INFO) |
2203 | printk("%s(%d):mgslpc_break(%s,%d)\n", | |
2204 | __FILE__,__LINE__, info->device_name, break_state); | |
d12341f9 | 2205 | |
1da177e4 | 2206 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break")) |
9e98966c | 2207 | return -EINVAL; |
1da177e4 LT |
2208 | |
2209 | spin_lock_irqsave(&info->lock,flags); | |
2210 | if (break_state == -1) | |
2211 | set_reg_bits(info, CHA+DAFO, BIT6); | |
d12341f9 | 2212 | else |
1da177e4 LT |
2213 | clear_reg_bits(info, CHA+DAFO, BIT6); |
2214 | spin_unlock_irqrestore(&info->lock,flags); | |
9e98966c | 2215 | return 0; |
1da177e4 LT |
2216 | } |
2217 | ||
2218 | /* Service an IOCTL request | |
d12341f9 | 2219 | * |
1da177e4 | 2220 | * Arguments: |
d12341f9 | 2221 | * |
1da177e4 LT |
2222 | * tty pointer to tty instance data |
2223 | * file pointer to associated file object for device | |
2224 | * cmd IOCTL command code | |
2225 | * arg command argument/context | |
d12341f9 | 2226 | * |
1da177e4 LT |
2227 | * Return Value: 0 if success, otherwise error code |
2228 | */ | |
2229 | static int mgslpc_ioctl(struct tty_struct *tty, struct file * file, | |
2230 | unsigned int cmd, unsigned long arg) | |
2231 | { | |
2232 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
eeb46134 AC |
2233 | int error; |
2234 | struct mgsl_icount cnow; /* kernel counter temps */ | |
2235 | struct serial_icounter_struct __user *p_cuser; /* user space */ | |
2236 | void __user *argp = (void __user *)arg; | |
2237 | unsigned long flags; | |
d12341f9 | 2238 | |
1da177e4 LT |
2239 | if (debug_level >= DEBUG_LEVEL_INFO) |
2240 | printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__, | |
2241 | info->device_name, cmd ); | |
d12341f9 | 2242 | |
1da177e4 LT |
2243 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl")) |
2244 | return -ENODEV; | |
2245 | ||
2246 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
2247 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { | |
2248 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
2249 | return -EIO; | |
2250 | } | |
2251 | ||
1da177e4 LT |
2252 | switch (cmd) { |
2253 | case MGSL_IOCGPARAMS: | |
2254 | return get_params(info, argp); | |
2255 | case MGSL_IOCSPARAMS: | |
eeb46134 | 2256 | return set_params(info, argp, tty); |
1da177e4 LT |
2257 | case MGSL_IOCGTXIDLE: |
2258 | return get_txidle(info, argp); | |
2259 | case MGSL_IOCSTXIDLE: | |
2260 | return set_txidle(info, (int)arg); | |
2261 | case MGSL_IOCGIF: | |
2262 | return get_interface(info, argp); | |
2263 | case MGSL_IOCSIF: | |
2264 | return set_interface(info,(int)arg); | |
2265 | case MGSL_IOCTXENABLE: | |
eeb46134 | 2266 | return set_txenable(info,(int)arg, tty); |
1da177e4 LT |
2267 | case MGSL_IOCRXENABLE: |
2268 | return set_rxenable(info,(int)arg); | |
2269 | case MGSL_IOCTXABORT: | |
2270 | return tx_abort(info); | |
2271 | case MGSL_IOCGSTATS: | |
2272 | return get_stats(info, argp); | |
2273 | case MGSL_IOCWAITEVENT: | |
2274 | return wait_events(info, argp); | |
2275 | case TIOCMIWAIT: | |
2276 | return modem_input_wait(info,(int)arg); | |
2277 | case TIOCGICOUNT: | |
2278 | spin_lock_irqsave(&info->lock,flags); | |
2279 | cnow = info->icount; | |
2280 | spin_unlock_irqrestore(&info->lock,flags); | |
2281 | p_cuser = argp; | |
2282 | PUT_USER(error,cnow.cts, &p_cuser->cts); | |
2283 | if (error) return error; | |
2284 | PUT_USER(error,cnow.dsr, &p_cuser->dsr); | |
2285 | if (error) return error; | |
2286 | PUT_USER(error,cnow.rng, &p_cuser->rng); | |
2287 | if (error) return error; | |
2288 | PUT_USER(error,cnow.dcd, &p_cuser->dcd); | |
2289 | if (error) return error; | |
2290 | PUT_USER(error,cnow.rx, &p_cuser->rx); | |
2291 | if (error) return error; | |
2292 | PUT_USER(error,cnow.tx, &p_cuser->tx); | |
2293 | if (error) return error; | |
2294 | PUT_USER(error,cnow.frame, &p_cuser->frame); | |
2295 | if (error) return error; | |
2296 | PUT_USER(error,cnow.overrun, &p_cuser->overrun); | |
2297 | if (error) return error; | |
2298 | PUT_USER(error,cnow.parity, &p_cuser->parity); | |
2299 | if (error) return error; | |
2300 | PUT_USER(error,cnow.brk, &p_cuser->brk); | |
2301 | if (error) return error; | |
2302 | PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun); | |
2303 | if (error) return error; | |
2304 | return 0; | |
2305 | default: | |
2306 | return -ENOIOCTLCMD; | |
2307 | } | |
2308 | return 0; | |
2309 | } | |
2310 | ||
2311 | /* Set new termios settings | |
d12341f9 | 2312 | * |
1da177e4 | 2313 | * Arguments: |
d12341f9 | 2314 | * |
1da177e4 LT |
2315 | * tty pointer to tty structure |
2316 | * termios pointer to buffer to hold returned old termios | |
2317 | */ | |
606d099c | 2318 | static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 LT |
2319 | { |
2320 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2321 | unsigned long flags; | |
d12341f9 | 2322 | |
1da177e4 LT |
2323 | if (debug_level >= DEBUG_LEVEL_INFO) |
2324 | printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__, | |
2325 | tty->driver->name ); | |
d12341f9 | 2326 | |
1da177e4 LT |
2327 | /* just return if nothing has changed */ |
2328 | if ((tty->termios->c_cflag == old_termios->c_cflag) | |
d12341f9 | 2329 | && (RELEVANT_IFLAG(tty->termios->c_iflag) |
1da177e4 LT |
2330 | == RELEVANT_IFLAG(old_termios->c_iflag))) |
2331 | return; | |
2332 | ||
eeb46134 | 2333 | mgslpc_change_params(info, tty); |
1da177e4 LT |
2334 | |
2335 | /* Handle transition to B0 status */ | |
2336 | if (old_termios->c_cflag & CBAUD && | |
2337 | !(tty->termios->c_cflag & CBAUD)) { | |
2338 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
2339 | spin_lock_irqsave(&info->lock,flags); | |
2340 | set_signals(info); | |
2341 | spin_unlock_irqrestore(&info->lock,flags); | |
2342 | } | |
d12341f9 | 2343 | |
1da177e4 LT |
2344 | /* Handle transition away from B0 status */ |
2345 | if (!(old_termios->c_cflag & CBAUD) && | |
2346 | tty->termios->c_cflag & CBAUD) { | |
2347 | info->serial_signals |= SerialSignal_DTR; | |
d12341f9 | 2348 | if (!(tty->termios->c_cflag & CRTSCTS) || |
1da177e4 LT |
2349 | !test_bit(TTY_THROTTLED, &tty->flags)) { |
2350 | info->serial_signals |= SerialSignal_RTS; | |
2351 | } | |
2352 | spin_lock_irqsave(&info->lock,flags); | |
2353 | set_signals(info); | |
2354 | spin_unlock_irqrestore(&info->lock,flags); | |
2355 | } | |
d12341f9 | 2356 | |
1da177e4 LT |
2357 | /* Handle turning off CRTSCTS */ |
2358 | if (old_termios->c_cflag & CRTSCTS && | |
2359 | !(tty->termios->c_cflag & CRTSCTS)) { | |
2360 | tty->hw_stopped = 0; | |
2361 | tx_release(tty); | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | static void mgslpc_close(struct tty_struct *tty, struct file * filp) | |
2366 | { | |
2367 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
eeb46134 | 2368 | struct tty_port *port = &info->port; |
1da177e4 LT |
2369 | |
2370 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close")) | |
2371 | return; | |
d12341f9 | 2372 | |
1da177e4 LT |
2373 | if (debug_level >= DEBUG_LEVEL_INFO) |
2374 | printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", | |
eeb46134 | 2375 | __FILE__,__LINE__, info->device_name, port->count); |
1da177e4 | 2376 | |
eeb46134 | 2377 | WARN_ON(!port->count); |
d12341f9 | 2378 | |
eeb46134 | 2379 | if (tty_port_close_start(port, tty, filp) == 0) |
1da177e4 | 2380 | goto cleanup; |
d12341f9 | 2381 | |
eeb46134 | 2382 | if (port->flags & ASYNC_INITIALIZED) |
1da177e4 LT |
2383 | mgslpc_wait_until_sent(tty, info->timeout); |
2384 | ||
978e595f | 2385 | mgslpc_flush_buffer(tty); |
1da177e4 | 2386 | |
978e595f | 2387 | tty_ldisc_flush(tty); |
eeb46134 AC |
2388 | shutdown(info, tty); |
2389 | ||
2390 | tty_port_close_end(port, tty); | |
2391 | tty_port_tty_set(port, NULL); | |
d12341f9 | 2392 | cleanup: |
1da177e4 LT |
2393 | if (debug_level >= DEBUG_LEVEL_INFO) |
2394 | printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__, | |
eeb46134 | 2395 | tty->driver->name, port->count); |
1da177e4 LT |
2396 | } |
2397 | ||
2398 | /* Wait until the transmitter is empty. | |
2399 | */ | |
2400 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout) | |
2401 | { | |
2402 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2403 | unsigned long orig_jiffies, char_time; | |
2404 | ||
2405 | if (!info ) | |
2406 | return; | |
2407 | ||
2408 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2409 | printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n", | |
2410 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 2411 | |
1da177e4 LT |
2412 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent")) |
2413 | return; | |
2414 | ||
eeb46134 | 2415 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
1da177e4 | 2416 | goto exit; |
d12341f9 | 2417 | |
1da177e4 | 2418 | orig_jiffies = jiffies; |
d12341f9 | 2419 | |
1da177e4 LT |
2420 | /* Set check interval to 1/5 of estimated time to |
2421 | * send a character, and make it at least 1. The check | |
2422 | * interval should also be less than the timeout. | |
2423 | * Note: use tight timings here to satisfy the NIST-PCTS. | |
d12341f9 JG |
2424 | */ |
2425 | ||
1da177e4 LT |
2426 | if ( info->params.data_rate ) { |
2427 | char_time = info->timeout/(32 * 5); | |
2428 | if (!char_time) | |
2429 | char_time++; | |
2430 | } else | |
2431 | char_time = 1; | |
d12341f9 | 2432 | |
1da177e4 LT |
2433 | if (timeout) |
2434 | char_time = min_t(unsigned long, char_time, timeout); | |
d12341f9 | 2435 | |
1da177e4 LT |
2436 | if (info->params.mode == MGSL_MODE_HDLC) { |
2437 | while (info->tx_active) { | |
2438 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
2439 | if (signal_pending(current)) | |
2440 | break; | |
2441 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2442 | break; | |
2443 | } | |
2444 | } else { | |
2445 | while ((info->tx_count || info->tx_active) && | |
2446 | info->tx_enabled) { | |
2447 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
2448 | if (signal_pending(current)) | |
2449 | break; | |
2450 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2451 | break; | |
2452 | } | |
2453 | } | |
d12341f9 | 2454 | |
1da177e4 LT |
2455 | exit: |
2456 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2457 | printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n", | |
2458 | __FILE__,__LINE__, info->device_name ); | |
2459 | } | |
2460 | ||
2461 | /* Called by tty_hangup() when a hangup is signaled. | |
2462 | * This is the same as closing all open files for the port. | |
2463 | */ | |
2464 | static void mgslpc_hangup(struct tty_struct *tty) | |
2465 | { | |
2466 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
d12341f9 | 2467 | |
1da177e4 LT |
2468 | if (debug_level >= DEBUG_LEVEL_INFO) |
2469 | printk("%s(%d):mgslpc_hangup(%s)\n", | |
2470 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 2471 | |
1da177e4 LT |
2472 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup")) |
2473 | return; | |
2474 | ||
2475 | mgslpc_flush_buffer(tty); | |
eeb46134 AC |
2476 | shutdown(info, tty); |
2477 | tty_port_hangup(&info->port); | |
1da177e4 LT |
2478 | } |
2479 | ||
eeb46134 | 2480 | static int carrier_raised(struct tty_port *port) |
1da177e4 | 2481 | { |
eeb46134 AC |
2482 | MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); |
2483 | unsigned long flags; | |
d12341f9 | 2484 | |
eeb46134 AC |
2485 | spin_lock_irqsave(&info->lock,flags); |
2486 | get_signals(info); | |
2487 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 2488 | |
eeb46134 AC |
2489 | if (info->serial_signals & SerialSignal_DCD) |
2490 | return 1; | |
2491 | return 0; | |
2492 | } | |
d12341f9 | 2493 | |
fcc8ac18 | 2494 | static void dtr_rts(struct tty_port *port, int onoff) |
eeb46134 AC |
2495 | { |
2496 | MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); | |
2497 | unsigned long flags; | |
d12341f9 | 2498 | |
eeb46134 | 2499 | spin_lock_irqsave(&info->lock,flags); |
fcc8ac18 AC |
2500 | if (onoff) |
2501 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
2502 | else | |
2503 | info->serial_signals &= ~SerialSignal_RTS + SerialSignal_DTR; | |
eeb46134 AC |
2504 | set_signals(info); |
2505 | spin_unlock_irqrestore(&info->lock,flags); | |
1da177e4 LT |
2506 | } |
2507 | ||
eeb46134 | 2508 | |
1da177e4 LT |
2509 | static int mgslpc_open(struct tty_struct *tty, struct file * filp) |
2510 | { | |
2511 | MGSLPC_INFO *info; | |
eeb46134 | 2512 | struct tty_port *port; |
1da177e4 LT |
2513 | int retval, line; |
2514 | unsigned long flags; | |
2515 | ||
d12341f9 | 2516 | /* verify range of specified line number */ |
1da177e4 LT |
2517 | line = tty->index; |
2518 | if ((line < 0) || (line >= mgslpc_device_count)) { | |
2519 | printk("%s(%d):mgslpc_open with invalid line #%d.\n", | |
2520 | __FILE__,__LINE__,line); | |
2521 | return -ENODEV; | |
2522 | } | |
2523 | ||
2524 | /* find the info structure for the specified line */ | |
2525 | info = mgslpc_device_list; | |
2526 | while(info && info->line != line) | |
2527 | info = info->next_device; | |
2528 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open")) | |
2529 | return -ENODEV; | |
d12341f9 | 2530 | |
eeb46134 | 2531 | port = &info->port; |
1da177e4 | 2532 | tty->driver_data = info; |
eeb46134 | 2533 | tty_port_tty_set(port, tty); |
d12341f9 | 2534 | |
1da177e4 LT |
2535 | if (debug_level >= DEBUG_LEVEL_INFO) |
2536 | printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", | |
eeb46134 | 2537 | __FILE__,__LINE__,tty->driver->name, port->count); |
1da177e4 LT |
2538 | |
2539 | /* If port is closing, signal caller to try again */ | |
eeb46134 AC |
2540 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){ |
2541 | if (port->flags & ASYNC_CLOSING) | |
2542 | interruptible_sleep_on(&port->close_wait); | |
2543 | retval = ((port->flags & ASYNC_HUP_NOTIFY) ? | |
1da177e4 LT |
2544 | -EAGAIN : -ERESTARTSYS); |
2545 | goto cleanup; | |
2546 | } | |
d12341f9 | 2547 | |
eeb46134 | 2548 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
1da177e4 LT |
2549 | |
2550 | spin_lock_irqsave(&info->netlock, flags); | |
2551 | if (info->netcount) { | |
2552 | retval = -EBUSY; | |
2553 | spin_unlock_irqrestore(&info->netlock, flags); | |
2554 | goto cleanup; | |
2555 | } | |
eeb46134 AC |
2556 | spin_lock(&port->lock); |
2557 | port->count++; | |
2558 | spin_unlock(&port->lock); | |
1da177e4 LT |
2559 | spin_unlock_irqrestore(&info->netlock, flags); |
2560 | ||
eeb46134 | 2561 | if (port->count == 1) { |
1da177e4 | 2562 | /* 1st open on this device, init hardware */ |
eeb46134 | 2563 | retval = startup(info, tty); |
1da177e4 LT |
2564 | if (retval < 0) |
2565 | goto cleanup; | |
2566 | } | |
2567 | ||
eeb46134 | 2568 | retval = tty_port_block_til_ready(&info->port, tty, filp); |
1da177e4 LT |
2569 | if (retval) { |
2570 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2571 | printk("%s(%d):block_til_ready(%s) returned %d\n", | |
2572 | __FILE__,__LINE__, info->device_name, retval); | |
2573 | goto cleanup; | |
2574 | } | |
2575 | ||
2576 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2577 | printk("%s(%d):mgslpc_open(%s) success\n", | |
2578 | __FILE__,__LINE__, info->device_name); | |
2579 | retval = 0; | |
d12341f9 JG |
2580 | |
2581 | cleanup: | |
1da177e4 LT |
2582 | return retval; |
2583 | } | |
2584 | ||
2585 | /* | |
2586 | * /proc fs routines.... | |
2587 | */ | |
2588 | ||
87687144 | 2589 | static inline void line_info(struct seq_file *m, MGSLPC_INFO *info) |
1da177e4 LT |
2590 | { |
2591 | char stat_buf[30]; | |
1da177e4 LT |
2592 | unsigned long flags; |
2593 | ||
87687144 | 2594 | seq_printf(m, "%s:io:%04X irq:%d", |
1da177e4 LT |
2595 | info->device_name, info->io_base, info->irq_level); |
2596 | ||
2597 | /* output current serial signal states */ | |
2598 | spin_lock_irqsave(&info->lock,flags); | |
2599 | get_signals(info); | |
2600 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 2601 | |
1da177e4 LT |
2602 | stat_buf[0] = 0; |
2603 | stat_buf[1] = 0; | |
2604 | if (info->serial_signals & SerialSignal_RTS) | |
2605 | strcat(stat_buf, "|RTS"); | |
2606 | if (info->serial_signals & SerialSignal_CTS) | |
2607 | strcat(stat_buf, "|CTS"); | |
2608 | if (info->serial_signals & SerialSignal_DTR) | |
2609 | strcat(stat_buf, "|DTR"); | |
2610 | if (info->serial_signals & SerialSignal_DSR) | |
2611 | strcat(stat_buf, "|DSR"); | |
2612 | if (info->serial_signals & SerialSignal_DCD) | |
2613 | strcat(stat_buf, "|CD"); | |
2614 | if (info->serial_signals & SerialSignal_RI) | |
2615 | strcat(stat_buf, "|RI"); | |
2616 | ||
2617 | if (info->params.mode == MGSL_MODE_HDLC) { | |
87687144 | 2618 | seq_printf(m, " HDLC txok:%d rxok:%d", |
1da177e4 LT |
2619 | info->icount.txok, info->icount.rxok); |
2620 | if (info->icount.txunder) | |
87687144 | 2621 | seq_printf(m, " txunder:%d", info->icount.txunder); |
1da177e4 | 2622 | if (info->icount.txabort) |
87687144 | 2623 | seq_printf(m, " txabort:%d", info->icount.txabort); |
1da177e4 | 2624 | if (info->icount.rxshort) |
87687144 | 2625 | seq_printf(m, " rxshort:%d", info->icount.rxshort); |
1da177e4 | 2626 | if (info->icount.rxlong) |
87687144 | 2627 | seq_printf(m, " rxlong:%d", info->icount.rxlong); |
1da177e4 | 2628 | if (info->icount.rxover) |
87687144 | 2629 | seq_printf(m, " rxover:%d", info->icount.rxover); |
1da177e4 | 2630 | if (info->icount.rxcrc) |
87687144 | 2631 | seq_printf(m, " rxcrc:%d", info->icount.rxcrc); |
1da177e4 | 2632 | } else { |
87687144 | 2633 | seq_printf(m, " ASYNC tx:%d rx:%d", |
1da177e4 LT |
2634 | info->icount.tx, info->icount.rx); |
2635 | if (info->icount.frame) | |
87687144 | 2636 | seq_printf(m, " fe:%d", info->icount.frame); |
1da177e4 | 2637 | if (info->icount.parity) |
87687144 | 2638 | seq_printf(m, " pe:%d", info->icount.parity); |
1da177e4 | 2639 | if (info->icount.brk) |
87687144 | 2640 | seq_printf(m, " brk:%d", info->icount.brk); |
1da177e4 | 2641 | if (info->icount.overrun) |
87687144 | 2642 | seq_printf(m, " oe:%d", info->icount.overrun); |
1da177e4 | 2643 | } |
d12341f9 | 2644 | |
1da177e4 | 2645 | /* Append serial signal status to end */ |
87687144 | 2646 | seq_printf(m, " %s\n", stat_buf+1); |
d12341f9 | 2647 | |
87687144 | 2648 | seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
1da177e4 LT |
2649 | info->tx_active,info->bh_requested,info->bh_running, |
2650 | info->pending_bh); | |
1da177e4 LT |
2651 | } |
2652 | ||
2653 | /* Called to print information about devices | |
2654 | */ | |
87687144 | 2655 | static int mgslpc_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2656 | { |
1da177e4 | 2657 | MGSLPC_INFO *info; |
d12341f9 | 2658 | |
87687144 | 2659 | seq_printf(m, "synclink driver:%s\n", driver_version); |
d12341f9 | 2660 | |
1da177e4 LT |
2661 | info = mgslpc_device_list; |
2662 | while( info ) { | |
87687144 | 2663 | line_info(m, info); |
1da177e4 LT |
2664 | info = info->next_device; |
2665 | } | |
87687144 AD |
2666 | return 0; |
2667 | } | |
1da177e4 | 2668 | |
87687144 AD |
2669 | static int mgslpc_proc_open(struct inode *inode, struct file *file) |
2670 | { | |
2671 | return single_open(file, mgslpc_proc_show, NULL); | |
1da177e4 LT |
2672 | } |
2673 | ||
87687144 AD |
2674 | static const struct file_operations mgslpc_proc_fops = { |
2675 | .owner = THIS_MODULE, | |
2676 | .open = mgslpc_proc_open, | |
2677 | .read = seq_read, | |
2678 | .llseek = seq_lseek, | |
2679 | .release = single_release, | |
2680 | }; | |
2681 | ||
cdaad343 | 2682 | static int rx_alloc_buffers(MGSLPC_INFO *info) |
1da177e4 LT |
2683 | { |
2684 | /* each buffer has header and data */ | |
2685 | info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size; | |
2686 | ||
2687 | /* calculate total allocation size for 8 buffers */ | |
2688 | info->rx_buf_total_size = info->rx_buf_size * 8; | |
2689 | ||
2690 | /* limit total allocated memory */ | |
2691 | if (info->rx_buf_total_size > 0x10000) | |
2692 | info->rx_buf_total_size = 0x10000; | |
2693 | ||
2694 | /* calculate number of buffers */ | |
2695 | info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size; | |
2696 | ||
2697 | info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL); | |
2698 | if (info->rx_buf == NULL) | |
2699 | return -ENOMEM; | |
2700 | ||
2701 | rx_reset_buffers(info); | |
2702 | return 0; | |
2703 | } | |
2704 | ||
cdaad343 | 2705 | static void rx_free_buffers(MGSLPC_INFO *info) |
1da177e4 | 2706 | { |
735d5661 | 2707 | kfree(info->rx_buf); |
1da177e4 LT |
2708 | info->rx_buf = NULL; |
2709 | } | |
2710 | ||
cdaad343 | 2711 | static int claim_resources(MGSLPC_INFO *info) |
1da177e4 LT |
2712 | { |
2713 | if (rx_alloc_buffers(info) < 0 ) { | |
2714 | printk( "Cant allocate rx buffer %s\n", info->device_name); | |
2715 | release_resources(info); | |
2716 | return -ENODEV; | |
d12341f9 | 2717 | } |
1da177e4 LT |
2718 | return 0; |
2719 | } | |
2720 | ||
cdaad343 | 2721 | static void release_resources(MGSLPC_INFO *info) |
1da177e4 LT |
2722 | { |
2723 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2724 | printk("release_resources(%s)\n", info->device_name); | |
2725 | rx_free_buffers(info); | |
2726 | } | |
2727 | ||
2728 | /* Add the specified device instance data structure to the | |
2729 | * global linked list of devices and increment the device count. | |
d12341f9 | 2730 | * |
1da177e4 LT |
2731 | * Arguments: info pointer to device instance data |
2732 | */ | |
cdaad343 | 2733 | static void mgslpc_add_device(MGSLPC_INFO *info) |
1da177e4 LT |
2734 | { |
2735 | info->next_device = NULL; | |
2736 | info->line = mgslpc_device_count; | |
2737 | sprintf(info->device_name,"ttySLP%d",info->line); | |
d12341f9 | 2738 | |
1da177e4 LT |
2739 | if (info->line < MAX_DEVICE_COUNT) { |
2740 | if (maxframe[info->line]) | |
2741 | info->max_frame_size = maxframe[info->line]; | |
1da177e4 LT |
2742 | } |
2743 | ||
2744 | mgslpc_device_count++; | |
d12341f9 | 2745 | |
1da177e4 LT |
2746 | if (!mgslpc_device_list) |
2747 | mgslpc_device_list = info; | |
d12341f9 | 2748 | else { |
1da177e4 LT |
2749 | MGSLPC_INFO *current_dev = mgslpc_device_list; |
2750 | while( current_dev->next_device ) | |
2751 | current_dev = current_dev->next_device; | |
2752 | current_dev->next_device = info; | |
2753 | } | |
d12341f9 | 2754 | |
1da177e4 LT |
2755 | if (info->max_frame_size < 4096) |
2756 | info->max_frame_size = 4096; | |
2757 | else if (info->max_frame_size > 65535) | |
2758 | info->max_frame_size = 65535; | |
d12341f9 | 2759 | |
1da177e4 LT |
2760 | printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n", |
2761 | info->device_name, info->io_base, info->irq_level); | |
2762 | ||
af69c7f9 | 2763 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
2764 | hdlcdev_init(info); |
2765 | #endif | |
2766 | } | |
2767 | ||
cdaad343 | 2768 | static void mgslpc_remove_device(MGSLPC_INFO *remove_info) |
1da177e4 LT |
2769 | { |
2770 | MGSLPC_INFO *info = mgslpc_device_list; | |
2771 | MGSLPC_INFO *last = NULL; | |
2772 | ||
2773 | while(info) { | |
2774 | if (info == remove_info) { | |
2775 | if (last) | |
2776 | last->next_device = info->next_device; | |
2777 | else | |
2778 | mgslpc_device_list = info->next_device; | |
af69c7f9 | 2779 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
2780 | hdlcdev_exit(info); |
2781 | #endif | |
2782 | release_resources(info); | |
2783 | kfree(info); | |
2784 | mgslpc_device_count--; | |
2785 | return; | |
2786 | } | |
2787 | last = info; | |
2788 | info = info->next_device; | |
2789 | } | |
2790 | } | |
2791 | ||
4af48c8c DB |
2792 | static struct pcmcia_device_id mgslpc_ids[] = { |
2793 | PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050), | |
2794 | PCMCIA_DEVICE_NULL | |
2795 | }; | |
2796 | MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids); | |
2797 | ||
1da177e4 LT |
2798 | static struct pcmcia_driver mgslpc_driver = { |
2799 | .owner = THIS_MODULE, | |
2800 | .drv = { | |
2801 | .name = "synclink_cs", | |
2802 | }, | |
15b99ac1 | 2803 | .probe = mgslpc_probe, |
cc3b4866 | 2804 | .remove = mgslpc_detach, |
4af48c8c | 2805 | .id_table = mgslpc_ids, |
98e4c28b DB |
2806 | .suspend = mgslpc_suspend, |
2807 | .resume = mgslpc_resume, | |
1da177e4 LT |
2808 | }; |
2809 | ||
b68e31d0 | 2810 | static const struct tty_operations mgslpc_ops = { |
1da177e4 LT |
2811 | .open = mgslpc_open, |
2812 | .close = mgslpc_close, | |
2813 | .write = mgslpc_write, | |
2814 | .put_char = mgslpc_put_char, | |
2815 | .flush_chars = mgslpc_flush_chars, | |
2816 | .write_room = mgslpc_write_room, | |
2817 | .chars_in_buffer = mgslpc_chars_in_buffer, | |
2818 | .flush_buffer = mgslpc_flush_buffer, | |
2819 | .ioctl = mgslpc_ioctl, | |
2820 | .throttle = mgslpc_throttle, | |
2821 | .unthrottle = mgslpc_unthrottle, | |
2822 | .send_xchar = mgslpc_send_xchar, | |
2823 | .break_ctl = mgslpc_break, | |
2824 | .wait_until_sent = mgslpc_wait_until_sent, | |
1da177e4 LT |
2825 | .set_termios = mgslpc_set_termios, |
2826 | .stop = tx_pause, | |
2827 | .start = tx_release, | |
2828 | .hangup = mgslpc_hangup, | |
2829 | .tiocmget = tiocmget, | |
2830 | .tiocmset = tiocmset, | |
87687144 | 2831 | .proc_fops = &mgslpc_proc_fops, |
1da177e4 LT |
2832 | }; |
2833 | ||
2834 | static void synclink_cs_cleanup(void) | |
2835 | { | |
2836 | int rc; | |
2837 | ||
2838 | printk("Unloading %s: version %s\n", driver_name, driver_version); | |
2839 | ||
2840 | while(mgslpc_device_list) | |
2841 | mgslpc_remove_device(mgslpc_device_list); | |
2842 | ||
2843 | if (serial_driver) { | |
2844 | if ((rc = tty_unregister_driver(serial_driver))) | |
2845 | printk("%s(%d) failed to unregister tty driver err=%d\n", | |
2846 | __FILE__,__LINE__,rc); | |
2847 | put_tty_driver(serial_driver); | |
2848 | } | |
2849 | ||
2850 | pcmcia_unregister_driver(&mgslpc_driver); | |
1da177e4 LT |
2851 | } |
2852 | ||
2853 | static int __init synclink_cs_init(void) | |
2854 | { | |
2855 | int rc; | |
2856 | ||
2857 | if (break_on_load) { | |
2858 | mgslpc_get_text_ptr(); | |
2859 | BREAKPOINT(); | |
2860 | } | |
2861 | ||
2862 | printk("%s %s\n", driver_name, driver_version); | |
2863 | ||
2864 | if ((rc = pcmcia_register_driver(&mgslpc_driver)) < 0) | |
2865 | return rc; | |
2866 | ||
2867 | serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT); | |
2868 | if (!serial_driver) { | |
2869 | rc = -ENOMEM; | |
2870 | goto error; | |
2871 | } | |
2872 | ||
2873 | /* Initialize the tty_driver structure */ | |
d12341f9 | 2874 | |
1da177e4 LT |
2875 | serial_driver->owner = THIS_MODULE; |
2876 | serial_driver->driver_name = "synclink_cs"; | |
2877 | serial_driver->name = "ttySLP"; | |
2878 | serial_driver->major = ttymajor; | |
2879 | serial_driver->minor_start = 64; | |
2880 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2881 | serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
2882 | serial_driver->init_termios = tty_std_termios; | |
2883 | serial_driver->init_termios.c_cflag = | |
2884 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2885 | serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
2886 | tty_set_operations(serial_driver, &mgslpc_ops); | |
2887 | ||
2888 | if ((rc = tty_register_driver(serial_driver)) < 0) { | |
2889 | printk("%s(%d):Couldn't register serial driver\n", | |
2890 | __FILE__,__LINE__); | |
2891 | put_tty_driver(serial_driver); | |
2892 | serial_driver = NULL; | |
2893 | goto error; | |
2894 | } | |
d12341f9 | 2895 | |
1da177e4 LT |
2896 | printk("%s %s, tty major#%d\n", |
2897 | driver_name, driver_version, | |
2898 | serial_driver->major); | |
d12341f9 | 2899 | |
1da177e4 LT |
2900 | return 0; |
2901 | ||
2902 | error: | |
2903 | synclink_cs_cleanup(); | |
2904 | return rc; | |
2905 | } | |
2906 | ||
d12341f9 | 2907 | static void __exit synclink_cs_exit(void) |
1da177e4 LT |
2908 | { |
2909 | synclink_cs_cleanup(); | |
2910 | } | |
2911 | ||
2912 | module_init(synclink_cs_init); | |
2913 | module_exit(synclink_cs_exit); | |
2914 | ||
2915 | static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate) | |
2916 | { | |
2917 | unsigned int M, N; | |
2918 | unsigned char val; | |
2919 | ||
d12341f9 JG |
2920 | /* note:standard BRG mode is broken in V3.2 chip |
2921 | * so enhanced mode is always used | |
1da177e4 LT |
2922 | */ |
2923 | ||
2924 | if (rate) { | |
2925 | N = 3686400 / rate; | |
2926 | if (!N) | |
2927 | N = 1; | |
2928 | N >>= 1; | |
2929 | for (M = 1; N > 64 && M < 16; M++) | |
2930 | N >>= 1; | |
2931 | N--; | |
2932 | ||
2933 | /* BGR[5..0] = N | |
2934 | * BGR[9..6] = M | |
2935 | * BGR[7..0] contained in BGR register | |
2936 | * BGR[9..8] contained in CCR2[7..6] | |
2937 | * divisor = (N+1)*2^M | |
2938 | * | |
2939 | * Note: M *must* not be zero (causes asymetric duty cycle) | |
d12341f9 | 2940 | */ |
1da177e4 LT |
2941 | write_reg(info, (unsigned char) (channel + BGR), |
2942 | (unsigned char) ((M << 6) + N)); | |
2943 | val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f; | |
2944 | val |= ((M << 4) & 0xc0); | |
2945 | write_reg(info, (unsigned char) (channel + CCR2), val); | |
2946 | } | |
2947 | } | |
2948 | ||
2949 | /* Enabled the AUX clock output at the specified frequency. | |
2950 | */ | |
2951 | static void enable_auxclk(MGSLPC_INFO *info) | |
2952 | { | |
2953 | unsigned char val; | |
d12341f9 | 2954 | |
1da177e4 LT |
2955 | /* MODE |
2956 | * | |
2957 | * 07..06 MDS[1..0] 10 = transparent HDLC mode | |
2958 | * 05 ADM Address Mode, 0 = no addr recognition | |
2959 | * 04 TMD Timer Mode, 0 = external | |
2960 | * 03 RAC Receiver Active, 0 = inactive | |
2961 | * 02 RTS 0=RTS active during xmit, 1=RTS always active | |
2962 | * 01 TRS Timer Resolution, 1=512 | |
2963 | * 00 TLP Test Loop, 0 = no loop | |
2964 | * | |
2965 | * 1000 0010 | |
d12341f9 | 2966 | */ |
1da177e4 | 2967 | val = 0x82; |
d12341f9 JG |
2968 | |
2969 | /* channel B RTS is used to enable AUXCLK driver on SP505 */ | |
1da177e4 LT |
2970 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
2971 | val |= BIT2; | |
2972 | write_reg(info, CHB + MODE, val); | |
d12341f9 | 2973 | |
1da177e4 LT |
2974 | /* CCR0 |
2975 | * | |
2976 | * 07 PU Power Up, 1=active, 0=power down | |
2977 | * 06 MCE Master Clock Enable, 1=enabled | |
2978 | * 05 Reserved, 0 | |
2979 | * 04..02 SC[2..0] Encoding | |
2980 | * 01..00 SM[1..0] Serial Mode, 00=HDLC | |
2981 | * | |
2982 | * 11000000 | |
d12341f9 | 2983 | */ |
1da177e4 | 2984 | write_reg(info, CHB + CCR0, 0xc0); |
d12341f9 | 2985 | |
1da177e4 LT |
2986 | /* CCR1 |
2987 | * | |
2988 | * 07 SFLG Shared Flag, 0 = disable shared flags | |
2989 | * 06 GALP Go Active On Loop, 0 = not used | |
2990 | * 05 GLP Go On Loop, 0 = not used | |
2991 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
2992 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag | |
2993 | * 02..00 CM[2..0] Clock Mode | |
2994 | * | |
2995 | * 0001 0111 | |
d12341f9 | 2996 | */ |
1da177e4 | 2997 | write_reg(info, CHB + CCR1, 0x17); |
d12341f9 | 2998 | |
1da177e4 LT |
2999 | /* CCR2 (Channel B) |
3000 | * | |
3001 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3002 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3003 | * 04 SSEL Clock source select, 1=submode b | |
3004 | * 03 TOE 0=TxCLK is input, 1=TxCLK is output | |
3005 | * 02 RWX Read/Write Exchange 0=disabled | |
3006 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 | |
3007 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3008 | * | |
3009 | * 0011 1000 | |
d12341f9 | 3010 | */ |
1da177e4 LT |
3011 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
3012 | write_reg(info, CHB + CCR2, 0x38); | |
3013 | else | |
3014 | write_reg(info, CHB + CCR2, 0x30); | |
d12341f9 | 3015 | |
1da177e4 LT |
3016 | /* CCR4 |
3017 | * | |
3018 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3019 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3020 | * 05 TST1 Test Pin, 0=normal operation | |
3021 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3022 | * 03..02 Reserved, must be 0 | |
3023 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes | |
3024 | * | |
3025 | * 0101 0000 | |
d12341f9 | 3026 | */ |
1da177e4 | 3027 | write_reg(info, CHB + CCR4, 0x50); |
d12341f9 | 3028 | |
1da177e4 LT |
3029 | /* if auxclk not enabled, set internal BRG so |
3030 | * CTS transitions can be detected (requires TxC) | |
d12341f9 | 3031 | */ |
1da177e4 LT |
3032 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
3033 | mgslpc_set_rate(info, CHB, info->params.clock_speed); | |
3034 | else | |
3035 | mgslpc_set_rate(info, CHB, 921600); | |
3036 | } | |
3037 | ||
d12341f9 | 3038 | static void loopback_enable(MGSLPC_INFO *info) |
1da177e4 LT |
3039 | { |
3040 | unsigned char val; | |
d12341f9 JG |
3041 | |
3042 | /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */ | |
1da177e4 LT |
3043 | val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0); |
3044 | write_reg(info, CHA + CCR1, val); | |
d12341f9 JG |
3045 | |
3046 | /* CCR2:04 SSEL Clock source select, 1=submode b */ | |
1da177e4 LT |
3047 | val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5); |
3048 | write_reg(info, CHA + CCR2, val); | |
d12341f9 JG |
3049 | |
3050 | /* set LinkSpeed if available, otherwise default to 2Mbps */ | |
1da177e4 LT |
3051 | if (info->params.clock_speed) |
3052 | mgslpc_set_rate(info, CHA, info->params.clock_speed); | |
3053 | else | |
3054 | mgslpc_set_rate(info, CHA, 1843200); | |
d12341f9 JG |
3055 | |
3056 | /* MODE:00 TLP Test Loop, 1=loopback enabled */ | |
1da177e4 LT |
3057 | val = read_reg(info, CHA + MODE) | BIT0; |
3058 | write_reg(info, CHA + MODE, val); | |
3059 | } | |
3060 | ||
cdaad343 | 3061 | static void hdlc_mode(MGSLPC_INFO *info) |
1da177e4 LT |
3062 | { |
3063 | unsigned char val; | |
3064 | unsigned char clkmode, clksubmode; | |
3065 | ||
d12341f9 | 3066 | /* disable all interrupts */ |
1da177e4 LT |
3067 | irq_disable(info, CHA, 0xffff); |
3068 | irq_disable(info, CHB, 0xffff); | |
3069 | port_irq_disable(info, 0xff); | |
d12341f9 JG |
3070 | |
3071 | /* assume clock mode 0a, rcv=RxC xmt=TxC */ | |
1da177e4 LT |
3072 | clkmode = clksubmode = 0; |
3073 | if (info->params.flags & HDLC_FLAG_RXC_DPLL | |
3074 | && info->params.flags & HDLC_FLAG_TXC_DPLL) { | |
d12341f9 | 3075 | /* clock mode 7a, rcv = DPLL, xmt = DPLL */ |
1da177e4 LT |
3076 | clkmode = 7; |
3077 | } else if (info->params.flags & HDLC_FLAG_RXC_BRG | |
3078 | && info->params.flags & HDLC_FLAG_TXC_BRG) { | |
d12341f9 | 3079 | /* clock mode 7b, rcv = BRG, xmt = BRG */ |
1da177e4 LT |
3080 | clkmode = 7; |
3081 | clksubmode = 1; | |
3082 | } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) { | |
3083 | if (info->params.flags & HDLC_FLAG_TXC_BRG) { | |
d12341f9 | 3084 | /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */ |
1da177e4 LT |
3085 | clkmode = 6; |
3086 | clksubmode = 1; | |
3087 | } else { | |
d12341f9 | 3088 | /* clock mode 6a, rcv = DPLL, xmt = TxC */ |
1da177e4 LT |
3089 | clkmode = 6; |
3090 | } | |
3091 | } else if (info->params.flags & HDLC_FLAG_TXC_BRG) { | |
d12341f9 | 3092 | /* clock mode 0b, rcv = RxC, xmt = BRG */ |
1da177e4 LT |
3093 | clksubmode = 1; |
3094 | } | |
d12341f9 | 3095 | |
1da177e4 LT |
3096 | /* MODE |
3097 | * | |
3098 | * 07..06 MDS[1..0] 10 = transparent HDLC mode | |
3099 | * 05 ADM Address Mode, 0 = no addr recognition | |
3100 | * 04 TMD Timer Mode, 0 = external | |
3101 | * 03 RAC Receiver Active, 0 = inactive | |
3102 | * 02 RTS 0=RTS active during xmit, 1=RTS always active | |
3103 | * 01 TRS Timer Resolution, 1=512 | |
3104 | * 00 TLP Test Loop, 0 = no loop | |
3105 | * | |
3106 | * 1000 0010 | |
d12341f9 | 3107 | */ |
1da177e4 LT |
3108 | val = 0x82; |
3109 | if (info->params.loopback) | |
3110 | val |= BIT0; | |
d12341f9 JG |
3111 | |
3112 | /* preserve RTS state */ | |
1da177e4 LT |
3113 | if (info->serial_signals & SerialSignal_RTS) |
3114 | val |= BIT2; | |
3115 | write_reg(info, CHA + MODE, val); | |
d12341f9 | 3116 | |
1da177e4 LT |
3117 | /* CCR0 |
3118 | * | |
3119 | * 07 PU Power Up, 1=active, 0=power down | |
3120 | * 06 MCE Master Clock Enable, 1=enabled | |
3121 | * 05 Reserved, 0 | |
3122 | * 04..02 SC[2..0] Encoding | |
3123 | * 01..00 SM[1..0] Serial Mode, 00=HDLC | |
3124 | * | |
3125 | * 11000000 | |
d12341f9 | 3126 | */ |
1da177e4 LT |
3127 | val = 0xc0; |
3128 | switch (info->params.encoding) | |
3129 | { | |
3130 | case HDLC_ENCODING_NRZI: | |
3131 | val |= BIT3; | |
3132 | break; | |
3133 | case HDLC_ENCODING_BIPHASE_SPACE: | |
3134 | val |= BIT4; | |
3135 | break; // FM0 | |
3136 | case HDLC_ENCODING_BIPHASE_MARK: | |
3137 | val |= BIT4 + BIT2; | |
3138 | break; // FM1 | |
3139 | case HDLC_ENCODING_BIPHASE_LEVEL: | |
3140 | val |= BIT4 + BIT3; | |
3141 | break; // Manchester | |
3142 | } | |
3143 | write_reg(info, CHA + CCR0, val); | |
d12341f9 | 3144 | |
1da177e4 LT |
3145 | /* CCR1 |
3146 | * | |
3147 | * 07 SFLG Shared Flag, 0 = disable shared flags | |
3148 | * 06 GALP Go Active On Loop, 0 = not used | |
3149 | * 05 GLP Go On Loop, 0 = not used | |
3150 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
3151 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag | |
3152 | * 02..00 CM[2..0] Clock Mode | |
3153 | * | |
3154 | * 0001 0000 | |
d12341f9 | 3155 | */ |
1da177e4 LT |
3156 | val = 0x10 + clkmode; |
3157 | write_reg(info, CHA + CCR1, val); | |
d12341f9 | 3158 | |
1da177e4 LT |
3159 | /* CCR2 |
3160 | * | |
3161 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3162 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3163 | * 04 SSEL Clock source select, 1=submode b | |
3164 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input | |
3165 | * 02 RWX Read/Write Exchange 0=disabled | |
3166 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 | |
3167 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3168 | * | |
3169 | * 0000 0000 | |
d12341f9 | 3170 | */ |
1da177e4 LT |
3171 | val = 0x00; |
3172 | if (clkmode == 2 || clkmode == 3 || clkmode == 6 | |
3173 | || clkmode == 7 || (clkmode == 0 && clksubmode == 1)) | |
3174 | val |= BIT5; | |
3175 | if (clksubmode) | |
3176 | val |= BIT4; | |
3177 | if (info->params.crc_type == HDLC_CRC_32_CCITT) | |
3178 | val |= BIT1; | |
3179 | if (info->params.encoding == HDLC_ENCODING_NRZB) | |
3180 | val |= BIT0; | |
3181 | write_reg(info, CHA + CCR2, val); | |
d12341f9 | 3182 | |
1da177e4 LT |
3183 | /* CCR3 |
3184 | * | |
3185 | * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8 | |
3186 | * 05 EPT Enable preamble transmission, 1=enabled | |
3187 | * 04 RADD Receive address pushed to FIFO, 0=disabled | |
3188 | * 03 CRL CRC Reset Level, 0=FFFF | |
3189 | * 02 RCRC Rx CRC 0=On 1=Off | |
3190 | * 01 TCRC Tx CRC 0=On 1=Off | |
3191 | * 00 PSD DPLL Phase Shift Disable | |
3192 | * | |
3193 | * 0000 0000 | |
d12341f9 | 3194 | */ |
1da177e4 LT |
3195 | val = 0x00; |
3196 | if (info->params.crc_type == HDLC_CRC_NONE) | |
3197 | val |= BIT2 + BIT1; | |
3198 | if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE) | |
3199 | val |= BIT5; | |
3200 | switch (info->params.preamble_length) | |
3201 | { | |
3202 | case HDLC_PREAMBLE_LENGTH_16BITS: | |
3203 | val |= BIT6; | |
3204 | break; | |
3205 | case HDLC_PREAMBLE_LENGTH_32BITS: | |
3206 | val |= BIT6; | |
3207 | break; | |
3208 | case HDLC_PREAMBLE_LENGTH_64BITS: | |
3209 | val |= BIT7 + BIT6; | |
3210 | break; | |
3211 | } | |
3212 | write_reg(info, CHA + CCR3, val); | |
d12341f9 JG |
3213 | |
3214 | /* PRE - Preamble pattern */ | |
1da177e4 LT |
3215 | val = 0; |
3216 | switch (info->params.preamble) | |
3217 | { | |
3218 | case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break; | |
3219 | case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break; | |
3220 | case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break; | |
3221 | case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break; | |
3222 | } | |
3223 | write_reg(info, CHA + PRE, val); | |
d12341f9 | 3224 | |
1da177e4 LT |
3225 | /* CCR4 |
3226 | * | |
3227 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3228 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3229 | * 05 TST1 Test Pin, 0=normal operation | |
3230 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3231 | * 03..02 Reserved, must be 0 | |
3232 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes | |
3233 | * | |
3234 | * 0101 0000 | |
d12341f9 | 3235 | */ |
1da177e4 LT |
3236 | val = 0x50; |
3237 | write_reg(info, CHA + CCR4, val); | |
3238 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) | |
3239 | mgslpc_set_rate(info, CHA, info->params.clock_speed * 16); | |
3240 | else | |
3241 | mgslpc_set_rate(info, CHA, info->params.clock_speed); | |
d12341f9 | 3242 | |
1da177e4 LT |
3243 | /* RLCR Receive length check register |
3244 | * | |
3245 | * 7 1=enable receive length check | |
3246 | * 6..0 Max frame length = (RL + 1) * 32 | |
d12341f9 | 3247 | */ |
1da177e4 | 3248 | write_reg(info, CHA + RLCR, 0); |
d12341f9 | 3249 | |
1da177e4 LT |
3250 | /* XBCH Transmit Byte Count High |
3251 | * | |
3252 | * 07 DMA mode, 0 = interrupt driven | |
3253 | * 06 NRM, 0=ABM (ignored) | |
3254 | * 05 CAS Carrier Auto Start | |
3255 | * 04 XC Transmit Continuously (ignored) | |
3256 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 | |
3257 | * | |
3258 | * 0000 0000 | |
d12341f9 | 3259 | */ |
1da177e4 LT |
3260 | val = 0x00; |
3261 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) | |
3262 | val |= BIT5; | |
3263 | write_reg(info, CHA + XBCH, val); | |
3264 | enable_auxclk(info); | |
3265 | if (info->params.loopback || info->testing_irq) | |
3266 | loopback_enable(info); | |
3267 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) | |
3268 | { | |
3269 | irq_enable(info, CHB, IRQ_CTS); | |
d12341f9 | 3270 | /* PVR[3] 1=AUTO CTS active */ |
1da177e4 LT |
3271 | set_reg_bits(info, CHA + PVR, BIT3); |
3272 | } else | |
3273 | clear_reg_bits(info, CHA + PVR, BIT3); | |
3274 | ||
3275 | irq_enable(info, CHA, | |
3276 | IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT + | |
3277 | IRQ_UNDERRUN + IRQ_TXFIFO); | |
3278 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); | |
3279 | wait_command_complete(info, CHA); | |
3280 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ | |
d12341f9 | 3281 | |
1da177e4 LT |
3282 | /* Master clock mode enabled above to allow reset commands |
3283 | * to complete even if no data clocks are present. | |
3284 | * | |
3285 | * Disable master clock mode for normal communications because | |
3286 | * V3.2 of the ESCC2 has a bug that prevents the transmit all sent | |
3287 | * IRQ when in master clock mode. | |
3288 | * | |
3289 | * Leave master clock mode enabled for IRQ test because the | |
3290 | * timer IRQ used by the test can only happen in master clock mode. | |
d12341f9 | 3291 | */ |
1da177e4 LT |
3292 | if (!info->testing_irq) |
3293 | clear_reg_bits(info, CHA + CCR0, BIT6); | |
3294 | ||
3295 | tx_set_idle(info); | |
3296 | ||
3297 | tx_stop(info); | |
3298 | rx_stop(info); | |
3299 | } | |
3300 | ||
cdaad343 | 3301 | static void rx_stop(MGSLPC_INFO *info) |
1da177e4 LT |
3302 | { |
3303 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3304 | printk("%s(%d):rx_stop(%s)\n", | |
3305 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 JG |
3306 | |
3307 | /* MODE:03 RAC Receiver Active, 0=inactive */ | |
1da177e4 LT |
3308 | clear_reg_bits(info, CHA + MODE, BIT3); |
3309 | ||
0fab6de0 JP |
3310 | info->rx_enabled = false; |
3311 | info->rx_overflow = false; | |
1da177e4 LT |
3312 | } |
3313 | ||
cdaad343 | 3314 | static void rx_start(MGSLPC_INFO *info) |
1da177e4 LT |
3315 | { |
3316 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3317 | printk("%s(%d):rx_start(%s)\n", | |
3318 | __FILE__,__LINE__, info->device_name ); | |
3319 | ||
3320 | rx_reset_buffers(info); | |
0fab6de0 JP |
3321 | info->rx_enabled = false; |
3322 | info->rx_overflow = false; | |
1da177e4 | 3323 | |
d12341f9 | 3324 | /* MODE:03 RAC Receiver Active, 1=active */ |
1da177e4 LT |
3325 | set_reg_bits(info, CHA + MODE, BIT3); |
3326 | ||
0fab6de0 | 3327 | info->rx_enabled = true; |
1da177e4 LT |
3328 | } |
3329 | ||
eeb46134 | 3330 | static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
3331 | { |
3332 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3333 | printk("%s(%d):tx_start(%s)\n", | |
3334 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 3335 | |
1da177e4 LT |
3336 | if (info->tx_count) { |
3337 | /* If auto RTS enabled and RTS is inactive, then assert */ | |
3338 | /* RTS and set a flag indicating that the driver should */ | |
3339 | /* negate RTS when the transmission completes. */ | |
0fab6de0 | 3340 | info->drop_rts_on_tx_done = false; |
1da177e4 LT |
3341 | |
3342 | if (info->params.flags & HDLC_FLAG_AUTO_RTS) { | |
3343 | get_signals(info); | |
3344 | if (!(info->serial_signals & SerialSignal_RTS)) { | |
3345 | info->serial_signals |= SerialSignal_RTS; | |
3346 | set_signals(info); | |
0fab6de0 | 3347 | info->drop_rts_on_tx_done = true; |
1da177e4 LT |
3348 | } |
3349 | } | |
3350 | ||
3351 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
3352 | if (!info->tx_active) { | |
0fab6de0 | 3353 | info->tx_active = true; |
eeb46134 | 3354 | tx_ready(info, tty); |
1da177e4 LT |
3355 | } |
3356 | } else { | |
0fab6de0 | 3357 | info->tx_active = true; |
eeb46134 | 3358 | tx_ready(info, tty); |
40565f19 JS |
3359 | mod_timer(&info->tx_timer, jiffies + |
3360 | msecs_to_jiffies(5000)); | |
1da177e4 LT |
3361 | } |
3362 | } | |
3363 | ||
3364 | if (!info->tx_enabled) | |
0fab6de0 | 3365 | info->tx_enabled = true; |
1da177e4 LT |
3366 | } |
3367 | ||
cdaad343 | 3368 | static void tx_stop(MGSLPC_INFO *info) |
1da177e4 LT |
3369 | { |
3370 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3371 | printk("%s(%d):tx_stop(%s)\n", | |
3372 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 JG |
3373 | |
3374 | del_timer(&info->tx_timer); | |
1da177e4 | 3375 | |
0fab6de0 JP |
3376 | info->tx_enabled = false; |
3377 | info->tx_active = false; | |
1da177e4 LT |
3378 | } |
3379 | ||
3380 | /* Reset the adapter to a known state and prepare it for further use. | |
3381 | */ | |
cdaad343 | 3382 | static void reset_device(MGSLPC_INFO *info) |
1da177e4 | 3383 | { |
d12341f9 | 3384 | /* power up both channels (set BIT7) */ |
1da177e4 LT |
3385 | write_reg(info, CHA + CCR0, 0x80); |
3386 | write_reg(info, CHB + CCR0, 0x80); | |
3387 | write_reg(info, CHA + MODE, 0); | |
3388 | write_reg(info, CHB + MODE, 0); | |
d12341f9 JG |
3389 | |
3390 | /* disable all interrupts */ | |
1da177e4 LT |
3391 | irq_disable(info, CHA, 0xffff); |
3392 | irq_disable(info, CHB, 0xffff); | |
3393 | port_irq_disable(info, 0xff); | |
d12341f9 | 3394 | |
1da177e4 LT |
3395 | /* PCR Port Configuration Register |
3396 | * | |
3397 | * 07..04 DEC[3..0] Serial I/F select outputs | |
3398 | * 03 output, 1=AUTO CTS control enabled | |
3399 | * 02 RI Ring Indicator input 0=active | |
3400 | * 01 DSR input 0=active | |
3401 | * 00 DTR output 0=active | |
3402 | * | |
3403 | * 0000 0110 | |
d12341f9 | 3404 | */ |
1da177e4 | 3405 | write_reg(info, PCR, 0x06); |
d12341f9 | 3406 | |
1da177e4 LT |
3407 | /* PVR Port Value Register |
3408 | * | |
3409 | * 07..04 DEC[3..0] Serial I/F select (0000=disabled) | |
3410 | * 03 AUTO CTS output 1=enabled | |
3411 | * 02 RI Ring Indicator input | |
3412 | * 01 DSR input | |
3413 | * 00 DTR output (1=inactive) | |
3414 | * | |
3415 | * 0000 0001 | |
3416 | */ | |
3417 | // write_reg(info, PVR, PVR_DTR); | |
d12341f9 | 3418 | |
1da177e4 LT |
3419 | /* IPC Interrupt Port Configuration |
3420 | * | |
3421 | * 07 VIS 1=Masked interrupts visible | |
3422 | * 06..05 Reserved, 0 | |
3423 | * 04..03 SLA Slave address, 00 ignored | |
3424 | * 02 CASM Cascading Mode, 1=daisy chain | |
3425 | * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low | |
3426 | * | |
3427 | * 0000 0101 | |
d12341f9 | 3428 | */ |
1da177e4 LT |
3429 | write_reg(info, IPC, 0x05); |
3430 | } | |
3431 | ||
cdaad343 | 3432 | static void async_mode(MGSLPC_INFO *info) |
1da177e4 LT |
3433 | { |
3434 | unsigned char val; | |
3435 | ||
d12341f9 | 3436 | /* disable all interrupts */ |
1da177e4 LT |
3437 | irq_disable(info, CHA, 0xffff); |
3438 | irq_disable(info, CHB, 0xffff); | |
3439 | port_irq_disable(info, 0xff); | |
d12341f9 | 3440 | |
1da177e4 LT |
3441 | /* MODE |
3442 | * | |
3443 | * 07 Reserved, 0 | |
3444 | * 06 FRTS RTS State, 0=active | |
3445 | * 05 FCTS Flow Control on CTS | |
3446 | * 04 FLON Flow Control Enable | |
3447 | * 03 RAC Receiver Active, 0 = inactive | |
3448 | * 02 RTS 0=Auto RTS, 1=manual RTS | |
3449 | * 01 TRS Timer Resolution, 1=512 | |
3450 | * 00 TLP Test Loop, 0 = no loop | |
3451 | * | |
3452 | * 0000 0110 | |
d12341f9 | 3453 | */ |
1da177e4 LT |
3454 | val = 0x06; |
3455 | if (info->params.loopback) | |
3456 | val |= BIT0; | |
d12341f9 JG |
3457 | |
3458 | /* preserve RTS state */ | |
1da177e4 LT |
3459 | if (!(info->serial_signals & SerialSignal_RTS)) |
3460 | val |= BIT6; | |
3461 | write_reg(info, CHA + MODE, val); | |
d12341f9 | 3462 | |
1da177e4 LT |
3463 | /* CCR0 |
3464 | * | |
3465 | * 07 PU Power Up, 1=active, 0=power down | |
3466 | * 06 MCE Master Clock Enable, 1=enabled | |
3467 | * 05 Reserved, 0 | |
3468 | * 04..02 SC[2..0] Encoding, 000=NRZ | |
3469 | * 01..00 SM[1..0] Serial Mode, 11=Async | |
3470 | * | |
3471 | * 1000 0011 | |
d12341f9 | 3472 | */ |
1da177e4 | 3473 | write_reg(info, CHA + CCR0, 0x83); |
d12341f9 | 3474 | |
1da177e4 LT |
3475 | /* CCR1 |
3476 | * | |
3477 | * 07..05 Reserved, 0 | |
3478 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
3479 | * 03 BCR Bit Clock Rate, 1=16x | |
3480 | * 02..00 CM[2..0] Clock Mode, 111=BRG | |
3481 | * | |
3482 | * 0001 1111 | |
d12341f9 | 3483 | */ |
1da177e4 | 3484 | write_reg(info, CHA + CCR1, 0x1f); |
d12341f9 | 3485 | |
1da177e4 LT |
3486 | /* CCR2 (channel A) |
3487 | * | |
3488 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3489 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3490 | * 04 SSEL Clock source select, 1=submode b | |
3491 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input | |
3492 | * 02 RWX Read/Write Exchange 0=disabled | |
3493 | * 01 Reserved, 0 | |
3494 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3495 | * | |
3496 | * 0001 0000 | |
d12341f9 | 3497 | */ |
1da177e4 | 3498 | write_reg(info, CHA + CCR2, 0x10); |
d12341f9 | 3499 | |
1da177e4 LT |
3500 | /* CCR3 |
3501 | * | |
3502 | * 07..01 Reserved, 0 | |
3503 | * 00 PSD DPLL Phase Shift Disable | |
3504 | * | |
3505 | * 0000 0000 | |
d12341f9 | 3506 | */ |
1da177e4 | 3507 | write_reg(info, CHA + CCR3, 0); |
d12341f9 | 3508 | |
1da177e4 LT |
3509 | /* CCR4 |
3510 | * | |
3511 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3512 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3513 | * 05 TST1 Test Pin, 0=normal operation | |
3514 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3515 | * 03..00 Reserved, must be 0 | |
3516 | * | |
3517 | * 0101 0000 | |
d12341f9 | 3518 | */ |
1da177e4 LT |
3519 | write_reg(info, CHA + CCR4, 0x50); |
3520 | mgslpc_set_rate(info, CHA, info->params.data_rate * 16); | |
d12341f9 | 3521 | |
1da177e4 LT |
3522 | /* DAFO Data Format |
3523 | * | |
3524 | * 07 Reserved, 0 | |
3525 | * 06 XBRK transmit break, 0=normal operation | |
3526 | * 05 Stop bits (0=1, 1=2) | |
3527 | * 04..03 PAR[1..0] Parity (01=odd, 10=even) | |
3528 | * 02 PAREN Parity Enable | |
3529 | * 01..00 CHL[1..0] Character Length (00=8, 01=7) | |
3530 | * | |
d12341f9 | 3531 | */ |
1da177e4 LT |
3532 | val = 0x00; |
3533 | if (info->params.data_bits != 8) | |
3534 | val |= BIT0; /* 7 bits */ | |
3535 | if (info->params.stop_bits != 1) | |
3536 | val |= BIT5; | |
3537 | if (info->params.parity != ASYNC_PARITY_NONE) | |
3538 | { | |
3539 | val |= BIT2; /* Parity enable */ | |
3540 | if (info->params.parity == ASYNC_PARITY_ODD) | |
3541 | val |= BIT3; | |
3542 | else | |
3543 | val |= BIT4; | |
3544 | } | |
3545 | write_reg(info, CHA + DAFO, val); | |
d12341f9 | 3546 | |
1da177e4 LT |
3547 | /* RFC Rx FIFO Control |
3548 | * | |
3549 | * 07 Reserved, 0 | |
3550 | * 06 DPS, 1=parity bit not stored in data byte | |
3551 | * 05 DXS, 0=all data stored in FIFO (including XON/XOFF) | |
3552 | * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO | |
3553 | * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte | |
3554 | * 01 Reserved, 0 | |
3555 | * 00 TCDE Terminate Char Detect Enable, 0=disabled | |
3556 | * | |
3557 | * 0101 1100 | |
d12341f9 | 3558 | */ |
1da177e4 | 3559 | write_reg(info, CHA + RFC, 0x5c); |
d12341f9 | 3560 | |
1da177e4 LT |
3561 | /* RLCR Receive length check register |
3562 | * | |
3563 | * Max frame length = (RL + 1) * 32 | |
d12341f9 | 3564 | */ |
1da177e4 | 3565 | write_reg(info, CHA + RLCR, 0); |
d12341f9 | 3566 | |
1da177e4 LT |
3567 | /* XBCH Transmit Byte Count High |
3568 | * | |
3569 | * 07 DMA mode, 0 = interrupt driven | |
3570 | * 06 NRM, 0=ABM (ignored) | |
3571 | * 05 CAS Carrier Auto Start | |
3572 | * 04 XC Transmit Continuously (ignored) | |
3573 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 | |
3574 | * | |
3575 | * 0000 0000 | |
d12341f9 | 3576 | */ |
1da177e4 LT |
3577 | val = 0x00; |
3578 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) | |
3579 | val |= BIT5; | |
3580 | write_reg(info, CHA + XBCH, val); | |
3581 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) | |
3582 | irq_enable(info, CHA, IRQ_CTS); | |
d12341f9 JG |
3583 | |
3584 | /* MODE:03 RAC Receiver Active, 1=active */ | |
1da177e4 LT |
3585 | set_reg_bits(info, CHA + MODE, BIT3); |
3586 | enable_auxclk(info); | |
3587 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) { | |
3588 | irq_enable(info, CHB, IRQ_CTS); | |
d12341f9 | 3589 | /* PVR[3] 1=AUTO CTS active */ |
1da177e4 LT |
3590 | set_reg_bits(info, CHA + PVR, BIT3); |
3591 | } else | |
3592 | clear_reg_bits(info, CHA + PVR, BIT3); | |
3593 | irq_enable(info, CHA, | |
3594 | IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME + | |
3595 | IRQ_ALLSENT + IRQ_TXFIFO); | |
3596 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); | |
3597 | wait_command_complete(info, CHA); | |
3598 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ | |
3599 | } | |
3600 | ||
3601 | /* Set the HDLC idle mode for the transmitter. | |
3602 | */ | |
cdaad343 | 3603 | static void tx_set_idle(MGSLPC_INFO *info) |
1da177e4 | 3604 | { |
d12341f9 | 3605 | /* Note: ESCC2 only supports flags and one idle modes */ |
1da177e4 LT |
3606 | if (info->idle_mode == HDLC_TXIDLE_FLAGS) |
3607 | set_reg_bits(info, CHA + CCR1, BIT3); | |
3608 | else | |
3609 | clear_reg_bits(info, CHA + CCR1, BIT3); | |
3610 | } | |
3611 | ||
3612 | /* get state of the V24 status (input) signals. | |
3613 | */ | |
cdaad343 | 3614 | static void get_signals(MGSLPC_INFO *info) |
1da177e4 LT |
3615 | { |
3616 | unsigned char status = 0; | |
d12341f9 JG |
3617 | |
3618 | /* preserve DTR and RTS */ | |
1da177e4 LT |
3619 | info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; |
3620 | ||
3621 | if (read_reg(info, CHB + VSTR) & BIT7) | |
3622 | info->serial_signals |= SerialSignal_DCD; | |
3623 | if (read_reg(info, CHB + STAR) & BIT1) | |
3624 | info->serial_signals |= SerialSignal_CTS; | |
3625 | ||
3626 | status = read_reg(info, CHA + PVR); | |
3627 | if (!(status & PVR_RI)) | |
3628 | info->serial_signals |= SerialSignal_RI; | |
3629 | if (!(status & PVR_DSR)) | |
3630 | info->serial_signals |= SerialSignal_DSR; | |
3631 | } | |
3632 | ||
3633 | /* Set the state of DTR and RTS based on contents of | |
3634 | * serial_signals member of device extension. | |
3635 | */ | |
cdaad343 | 3636 | static void set_signals(MGSLPC_INFO *info) |
1da177e4 LT |
3637 | { |
3638 | unsigned char val; | |
3639 | ||
3640 | val = read_reg(info, CHA + MODE); | |
3641 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
3642 | if (info->serial_signals & SerialSignal_RTS) | |
3643 | val &= ~BIT6; | |
3644 | else | |
3645 | val |= BIT6; | |
3646 | } else { | |
3647 | if (info->serial_signals & SerialSignal_RTS) | |
3648 | val |= BIT2; | |
3649 | else | |
3650 | val &= ~BIT2; | |
3651 | } | |
3652 | write_reg(info, CHA + MODE, val); | |
3653 | ||
3654 | if (info->serial_signals & SerialSignal_DTR) | |
3655 | clear_reg_bits(info, CHA + PVR, PVR_DTR); | |
3656 | else | |
3657 | set_reg_bits(info, CHA + PVR, PVR_DTR); | |
3658 | } | |
3659 | ||
cdaad343 | 3660 | static void rx_reset_buffers(MGSLPC_INFO *info) |
1da177e4 LT |
3661 | { |
3662 | RXBUF *buf; | |
3663 | int i; | |
3664 | ||
3665 | info->rx_put = 0; | |
3666 | info->rx_get = 0; | |
3667 | info->rx_frame_count = 0; | |
3668 | for (i=0 ; i < info->rx_buf_count ; i++) { | |
3669 | buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size)); | |
3670 | buf->status = buf->count = 0; | |
3671 | } | |
3672 | } | |
3673 | ||
3674 | /* Attempt to return a received HDLC frame | |
3675 | * Only frames received without errors are returned. | |
3676 | * | |
0fab6de0 | 3677 | * Returns true if frame returned, otherwise false |
1da177e4 | 3678 | */ |
eeb46134 | 3679 | static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
3680 | { |
3681 | unsigned short status; | |
3682 | RXBUF *buf; | |
3683 | unsigned int framesize = 0; | |
3684 | unsigned long flags; | |
0fab6de0 | 3685 | bool return_frame = false; |
d12341f9 | 3686 | |
1da177e4 | 3687 | if (info->rx_frame_count == 0) |
0fab6de0 | 3688 | return false; |
1da177e4 LT |
3689 | |
3690 | buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size)); | |
3691 | ||
3692 | status = buf->status; | |
3693 | ||
3694 | /* 07 VFR 1=valid frame | |
3695 | * 06 RDO 1=data overrun | |
3696 | * 05 CRC 1=OK, 0=error | |
3697 | * 04 RAB 1=frame aborted | |
3698 | */ | |
3699 | if ((status & 0xf0) != 0xA0) { | |
3700 | if (!(status & BIT7) || (status & BIT4)) | |
3701 | info->icount.rxabort++; | |
3702 | else if (status & BIT6) | |
3703 | info->icount.rxover++; | |
3704 | else if (!(status & BIT5)) { | |
3705 | info->icount.rxcrc++; | |
3706 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) | |
0fab6de0 | 3707 | return_frame = true; |
1da177e4 LT |
3708 | } |
3709 | framesize = 0; | |
af69c7f9 | 3710 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 | 3711 | { |
198191c4 KH |
3712 | info->netdev->stats.rx_errors++; |
3713 | info->netdev->stats.rx_frame_errors++; | |
1da177e4 LT |
3714 | } |
3715 | #endif | |
3716 | } else | |
0fab6de0 | 3717 | return_frame = true; |
1da177e4 LT |
3718 | |
3719 | if (return_frame) | |
3720 | framesize = buf->count; | |
3721 | ||
3722 | if (debug_level >= DEBUG_LEVEL_BH) | |
3723 | printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n", | |
3724 | __FILE__,__LINE__,info->device_name,status,framesize); | |
d12341f9 | 3725 | |
1da177e4 | 3726 | if (debug_level >= DEBUG_LEVEL_DATA) |
d12341f9 JG |
3727 | trace_block(info, buf->data, framesize, 0); |
3728 | ||
1da177e4 LT |
3729 | if (framesize) { |
3730 | if ((info->params.crc_type & HDLC_CRC_RETURN_EX && | |
3731 | framesize+1 > info->max_frame_size) || | |
3732 | framesize > info->max_frame_size) | |
3733 | info->icount.rxlong++; | |
3734 | else { | |
3735 | if (status & BIT5) | |
3736 | info->icount.rxok++; | |
3737 | ||
3738 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) { | |
3739 | *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR; | |
3740 | ++framesize; | |
3741 | } | |
3742 | ||
af69c7f9 | 3743 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
3744 | if (info->netcount) |
3745 | hdlcdev_rx(info, buf->data, framesize); | |
3746 | else | |
3747 | #endif | |
3748 | ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize); | |
3749 | } | |
3750 | } | |
3751 | ||
3752 | spin_lock_irqsave(&info->lock,flags); | |
3753 | buf->status = buf->count = 0; | |
3754 | info->rx_frame_count--; | |
3755 | info->rx_get++; | |
3756 | if (info->rx_get >= info->rx_buf_count) | |
3757 | info->rx_get = 0; | |
3758 | spin_unlock_irqrestore(&info->lock,flags); | |
3759 | ||
0fab6de0 | 3760 | return true; |
1da177e4 LT |
3761 | } |
3762 | ||
0fab6de0 | 3763 | static bool register_test(MGSLPC_INFO *info) |
1da177e4 | 3764 | { |
d12341f9 | 3765 | static unsigned char patterns[] = |
1da177e4 | 3766 | { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f }; |
fe971071 | 3767 | static unsigned int count = ARRAY_SIZE(patterns); |
1da177e4 | 3768 | unsigned int i; |
0fab6de0 | 3769 | bool rc = true; |
1da177e4 LT |
3770 | unsigned long flags; |
3771 | ||
3772 | spin_lock_irqsave(&info->lock,flags); | |
3773 | reset_device(info); | |
3774 | ||
3775 | for (i = 0; i < count; i++) { | |
3776 | write_reg(info, XAD1, patterns[i]); | |
3777 | write_reg(info, XAD2, patterns[(i + 1) % count]); | |
fe971071 | 3778 | if ((read_reg(info, XAD1) != patterns[i]) || |
1da177e4 | 3779 | (read_reg(info, XAD2) != patterns[(i + 1) % count])) { |
0fab6de0 | 3780 | rc = false; |
1da177e4 LT |
3781 | break; |
3782 | } | |
3783 | } | |
3784 | ||
3785 | spin_unlock_irqrestore(&info->lock,flags); | |
3786 | return rc; | |
3787 | } | |
3788 | ||
0fab6de0 | 3789 | static bool irq_test(MGSLPC_INFO *info) |
1da177e4 LT |
3790 | { |
3791 | unsigned long end_time; | |
3792 | unsigned long flags; | |
3793 | ||
3794 | spin_lock_irqsave(&info->lock,flags); | |
3795 | reset_device(info); | |
3796 | ||
0fab6de0 | 3797 | info->testing_irq = true; |
1da177e4 LT |
3798 | hdlc_mode(info); |
3799 | ||
0fab6de0 | 3800 | info->irq_occurred = false; |
1da177e4 LT |
3801 | |
3802 | /* init hdlc mode */ | |
3803 | ||
3804 | irq_enable(info, CHA, IRQ_TIMER); | |
3805 | write_reg(info, CHA + TIMR, 0); /* 512 cycles */ | |
3806 | issue_command(info, CHA, CMD_START_TIMER); | |
3807 | ||
3808 | spin_unlock_irqrestore(&info->lock,flags); | |
3809 | ||
3810 | end_time=100; | |
3811 | while(end_time-- && !info->irq_occurred) { | |
3812 | msleep_interruptible(10); | |
3813 | } | |
d12341f9 | 3814 | |
0fab6de0 | 3815 | info->testing_irq = false; |
1da177e4 LT |
3816 | |
3817 | spin_lock_irqsave(&info->lock,flags); | |
3818 | reset_device(info); | |
3819 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 3820 | |
0fab6de0 | 3821 | return info->irq_occurred; |
1da177e4 LT |
3822 | } |
3823 | ||
cdaad343 | 3824 | static int adapter_test(MGSLPC_INFO *info) |
1da177e4 LT |
3825 | { |
3826 | if (!register_test(info)) { | |
3827 | info->init_error = DiagStatus_AddressFailure; | |
3828 | printk( "%s(%d):Register test failure for device %s Addr=%04X\n", | |
3829 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) ); | |
3830 | return -ENODEV; | |
3831 | } | |
3832 | ||
3833 | if (!irq_test(info)) { | |
3834 | info->init_error = DiagStatus_IrqFailure; | |
3835 | printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", | |
3836 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); | |
3837 | return -ENODEV; | |
3838 | } | |
3839 | ||
3840 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3841 | printk("%s(%d):device %s passed diagnostics\n", | |
3842 | __FILE__,__LINE__,info->device_name); | |
3843 | return 0; | |
3844 | } | |
3845 | ||
cdaad343 | 3846 | static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit) |
1da177e4 LT |
3847 | { |
3848 | int i; | |
3849 | int linecount; | |
3850 | if (xmit) | |
3851 | printk("%s tx data:\n",info->device_name); | |
3852 | else | |
3853 | printk("%s rx data:\n",info->device_name); | |
d12341f9 | 3854 | |
1da177e4 LT |
3855 | while(count) { |
3856 | if (count > 16) | |
3857 | linecount = 16; | |
3858 | else | |
3859 | linecount = count; | |
d12341f9 | 3860 | |
1da177e4 LT |
3861 | for(i=0;i<linecount;i++) |
3862 | printk("%02X ",(unsigned char)data[i]); | |
3863 | for(;i<17;i++) | |
3864 | printk(" "); | |
3865 | for(i=0;i<linecount;i++) { | |
3866 | if (data[i]>=040 && data[i]<=0176) | |
3867 | printk("%c",data[i]); | |
3868 | else | |
3869 | printk("."); | |
3870 | } | |
3871 | printk("\n"); | |
d12341f9 | 3872 | |
1da177e4 LT |
3873 | data += linecount; |
3874 | count -= linecount; | |
3875 | } | |
3876 | } | |
3877 | ||
3878 | /* HDLC frame time out | |
3879 | * update stats and do tx completion processing | |
3880 | */ | |
cdaad343 | 3881 | static void tx_timeout(unsigned long context) |
1da177e4 LT |
3882 | { |
3883 | MGSLPC_INFO *info = (MGSLPC_INFO*)context; | |
3884 | unsigned long flags; | |
d12341f9 | 3885 | |
1da177e4 LT |
3886 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
3887 | printk( "%s(%d):tx_timeout(%s)\n", | |
3888 | __FILE__,__LINE__,info->device_name); | |
3889 | if(info->tx_active && | |
3890 | info->params.mode == MGSL_MODE_HDLC) { | |
3891 | info->icount.txtimeout++; | |
3892 | } | |
3893 | spin_lock_irqsave(&info->lock,flags); | |
0fab6de0 | 3894 | info->tx_active = false; |
1da177e4 LT |
3895 | info->tx_count = info->tx_put = info->tx_get = 0; |
3896 | ||
3897 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 3898 | |
af69c7f9 | 3899 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
3900 | if (info->netcount) |
3901 | hdlcdev_tx_done(info); | |
3902 | else | |
3903 | #endif | |
eeb46134 AC |
3904 | { |
3905 | struct tty_struct *tty = tty_port_tty_get(&info->port); | |
3906 | bh_transmit(info, tty); | |
3907 | tty_kref_put(tty); | |
3908 | } | |
1da177e4 LT |
3909 | } |
3910 | ||
af69c7f9 | 3911 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
3912 | |
3913 | /** | |
3914 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) | |
3915 | * set encoding and frame check sequence (FCS) options | |
3916 | * | |
3917 | * dev pointer to network device structure | |
3918 | * encoding serial encoding setting | |
3919 | * parity FCS setting | |
3920 | * | |
3921 | * returns 0 if success, otherwise error code | |
3922 | */ | |
3923 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, | |
3924 | unsigned short parity) | |
3925 | { | |
3926 | MGSLPC_INFO *info = dev_to_port(dev); | |
eeb46134 | 3927 | struct tty_struct *tty; |
1da177e4 LT |
3928 | unsigned char new_encoding; |
3929 | unsigned short new_crctype; | |
3930 | ||
3931 | /* return error if TTY interface open */ | |
eeb46134 | 3932 | if (info->port.count) |
1da177e4 LT |
3933 | return -EBUSY; |
3934 | ||
3935 | switch (encoding) | |
3936 | { | |
3937 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; | |
3938 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; | |
3939 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; | |
3940 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; | |
3941 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; | |
3942 | default: return -EINVAL; | |
3943 | } | |
3944 | ||
3945 | switch (parity) | |
3946 | { | |
3947 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; | |
3948 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; | |
3949 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; | |
3950 | default: return -EINVAL; | |
3951 | } | |
3952 | ||
3953 | info->params.encoding = new_encoding; | |
53b3531b | 3954 | info->params.crc_type = new_crctype; |
1da177e4 LT |
3955 | |
3956 | /* if network interface up, reprogram hardware */ | |
eeb46134 AC |
3957 | if (info->netcount) { |
3958 | tty = tty_port_tty_get(&info->port); | |
3959 | mgslpc_program_hw(info, tty); | |
3960 | tty_kref_put(tty); | |
3961 | } | |
1da177e4 LT |
3962 | |
3963 | return 0; | |
3964 | } | |
3965 | ||
3966 | /** | |
3967 | * called by generic HDLC layer to send frame | |
3968 | * | |
3969 | * skb socket buffer containing HDLC frame | |
3970 | * dev pointer to network device structure | |
1da177e4 | 3971 | */ |
4c5d502d SH |
3972 | static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, |
3973 | struct net_device *dev) | |
1da177e4 LT |
3974 | { |
3975 | MGSLPC_INFO *info = dev_to_port(dev); | |
1da177e4 LT |
3976 | unsigned long flags; |
3977 | ||
3978 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3979 | printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); | |
3980 | ||
3981 | /* stop sending until this frame completes */ | |
3982 | netif_stop_queue(dev); | |
3983 | ||
3984 | /* copy data to device buffers */ | |
d626f62b | 3985 | skb_copy_from_linear_data(skb, info->tx_buf, skb->len); |
1da177e4 LT |
3986 | info->tx_get = 0; |
3987 | info->tx_put = info->tx_count = skb->len; | |
3988 | ||
3989 | /* update network statistics */ | |
198191c4 KH |
3990 | dev->stats.tx_packets++; |
3991 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
3992 | |
3993 | /* done with socket buffer, so free it */ | |
3994 | dev_kfree_skb(skb); | |
3995 | ||
3996 | /* save start time for transmit timeout detection */ | |
3997 | dev->trans_start = jiffies; | |
3998 | ||
3999 | /* start hardware transmitter if necessary */ | |
4000 | spin_lock_irqsave(&info->lock,flags); | |
eeb46134 AC |
4001 | if (!info->tx_active) { |
4002 | struct tty_struct *tty = tty_port_tty_get(&info->port); | |
4003 | tx_start(info, tty); | |
4004 | tty_kref_put(tty); | |
4005 | } | |
1da177e4 LT |
4006 | spin_unlock_irqrestore(&info->lock,flags); |
4007 | ||
4c5d502d | 4008 | return NETDEV_TX_OK; |
1da177e4 LT |
4009 | } |
4010 | ||
4011 | /** | |
4012 | * called by network layer when interface enabled | |
4013 | * claim resources and initialize hardware | |
4014 | * | |
4015 | * dev pointer to network device structure | |
4016 | * | |
4017 | * returns 0 if success, otherwise error code | |
4018 | */ | |
4019 | static int hdlcdev_open(struct net_device *dev) | |
4020 | { | |
4021 | MGSLPC_INFO *info = dev_to_port(dev); | |
eeb46134 | 4022 | struct tty_struct *tty; |
1da177e4 LT |
4023 | int rc; |
4024 | unsigned long flags; | |
4025 | ||
4026 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4027 | printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); | |
4028 | ||
4029 | /* generic HDLC layer open processing */ | |
4030 | if ((rc = hdlc_open(dev))) | |
4031 | return rc; | |
4032 | ||
4033 | /* arbitrate between network and tty opens */ | |
4034 | spin_lock_irqsave(&info->netlock, flags); | |
eeb46134 | 4035 | if (info->port.count != 0 || info->netcount != 0) { |
1da177e4 LT |
4036 | printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); |
4037 | spin_unlock_irqrestore(&info->netlock, flags); | |
4038 | return -EBUSY; | |
4039 | } | |
4040 | info->netcount=1; | |
4041 | spin_unlock_irqrestore(&info->netlock, flags); | |
4042 | ||
eeb46134 | 4043 | tty = tty_port_tty_get(&info->port); |
1da177e4 | 4044 | /* claim resources and init adapter */ |
eeb46134 AC |
4045 | if ((rc = startup(info, tty)) != 0) { |
4046 | tty_kref_put(tty); | |
1da177e4 LT |
4047 | spin_lock_irqsave(&info->netlock, flags); |
4048 | info->netcount=0; | |
4049 | spin_unlock_irqrestore(&info->netlock, flags); | |
4050 | return rc; | |
4051 | } | |
1da177e4 LT |
4052 | /* assert DTR and RTS, apply hardware settings */ |
4053 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
eeb46134 AC |
4054 | mgslpc_program_hw(info, tty); |
4055 | tty_kref_put(tty); | |
1da177e4 LT |
4056 | |
4057 | /* enable network layer transmit */ | |
4058 | dev->trans_start = jiffies; | |
4059 | netif_start_queue(dev); | |
4060 | ||
4061 | /* inform generic HDLC layer of current DCD status */ | |
4062 | spin_lock_irqsave(&info->lock, flags); | |
4063 | get_signals(info); | |
4064 | spin_unlock_irqrestore(&info->lock, flags); | |
fbeff3c1 KH |
4065 | if (info->serial_signals & SerialSignal_DCD) |
4066 | netif_carrier_on(dev); | |
4067 | else | |
4068 | netif_carrier_off(dev); | |
1da177e4 LT |
4069 | return 0; |
4070 | } | |
4071 | ||
4072 | /** | |
4073 | * called by network layer when interface is disabled | |
4074 | * shutdown hardware and release resources | |
4075 | * | |
4076 | * dev pointer to network device structure | |
4077 | * | |
4078 | * returns 0 if success, otherwise error code | |
4079 | */ | |
4080 | static int hdlcdev_close(struct net_device *dev) | |
4081 | { | |
4082 | MGSLPC_INFO *info = dev_to_port(dev); | |
eeb46134 | 4083 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
1da177e4 LT |
4084 | unsigned long flags; |
4085 | ||
4086 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4087 | printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); | |
4088 | ||
4089 | netif_stop_queue(dev); | |
4090 | ||
4091 | /* shutdown adapter and release resources */ | |
eeb46134 AC |
4092 | shutdown(info, tty); |
4093 | tty_kref_put(tty); | |
1da177e4 LT |
4094 | hdlc_close(dev); |
4095 | ||
4096 | spin_lock_irqsave(&info->netlock, flags); | |
4097 | info->netcount=0; | |
4098 | spin_unlock_irqrestore(&info->netlock, flags); | |
4099 | ||
4100 | return 0; | |
4101 | } | |
4102 | ||
4103 | /** | |
4104 | * called by network layer to process IOCTL call to network device | |
4105 | * | |
4106 | * dev pointer to network device structure | |
4107 | * ifr pointer to network interface request structure | |
4108 | * cmd IOCTL command code | |
4109 | * | |
4110 | * returns 0 if success, otherwise error code | |
4111 | */ | |
4112 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
4113 | { | |
4114 | const size_t size = sizeof(sync_serial_settings); | |
4115 | sync_serial_settings new_line; | |
4116 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; | |
4117 | MGSLPC_INFO *info = dev_to_port(dev); | |
4118 | unsigned int flags; | |
4119 | ||
4120 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4121 | printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); | |
4122 | ||
4123 | /* return error if TTY interface open */ | |
eeb46134 | 4124 | if (info->port.count) |
1da177e4 LT |
4125 | return -EBUSY; |
4126 | ||
4127 | if (cmd != SIOCWANDEV) | |
4128 | return hdlc_ioctl(dev, ifr, cmd); | |
4129 | ||
4130 | switch(ifr->ifr_settings.type) { | |
4131 | case IF_GET_IFACE: /* return current sync_serial_settings */ | |
4132 | ||
4133 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; | |
4134 | if (ifr->ifr_settings.size < size) { | |
4135 | ifr->ifr_settings.size = size; /* data size wanted */ | |
4136 | return -ENOBUFS; | |
4137 | } | |
4138 | ||
4139 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4140 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4141 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4142 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
4143 | ||
4144 | switch (flags){ | |
4145 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; | |
4146 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; | |
4147 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; | |
4148 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; | |
4149 | default: new_line.clock_type = CLOCK_DEFAULT; | |
4150 | } | |
4151 | ||
4152 | new_line.clock_rate = info->params.clock_speed; | |
4153 | new_line.loopback = info->params.loopback ? 1:0; | |
4154 | ||
4155 | if (copy_to_user(line, &new_line, size)) | |
4156 | return -EFAULT; | |
4157 | return 0; | |
4158 | ||
4159 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ | |
4160 | ||
4161 | if(!capable(CAP_NET_ADMIN)) | |
4162 | return -EPERM; | |
4163 | if (copy_from_user(&new_line, line, size)) | |
4164 | return -EFAULT; | |
4165 | ||
4166 | switch (new_line.clock_type) | |
4167 | { | |
4168 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; | |
4169 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; | |
4170 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; | |
4171 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; | |
4172 | case CLOCK_DEFAULT: flags = info->params.flags & | |
4173 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4174 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4175 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4176 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; | |
4177 | default: return -EINVAL; | |
4178 | } | |
4179 | ||
4180 | if (new_line.loopback != 0 && new_line.loopback != 1) | |
4181 | return -EINVAL; | |
4182 | ||
4183 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4184 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4185 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4186 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
4187 | info->params.flags |= flags; | |
4188 | ||
4189 | info->params.loopback = new_line.loopback; | |
4190 | ||
4191 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) | |
4192 | info->params.clock_speed = new_line.clock_rate; | |
4193 | else | |
4194 | info->params.clock_speed = 0; | |
4195 | ||
4196 | /* if network interface up, reprogram hardware */ | |
eeb46134 AC |
4197 | if (info->netcount) { |
4198 | struct tty_struct *tty = tty_port_tty_get(&info->port); | |
4199 | mgslpc_program_hw(info, tty); | |
4200 | tty_kref_put(tty); | |
4201 | } | |
1da177e4 LT |
4202 | return 0; |
4203 | ||
4204 | default: | |
4205 | return hdlc_ioctl(dev, ifr, cmd); | |
4206 | } | |
4207 | } | |
4208 | ||
4209 | /** | |
4210 | * called by network layer when transmit timeout is detected | |
4211 | * | |
4212 | * dev pointer to network device structure | |
4213 | */ | |
4214 | static void hdlcdev_tx_timeout(struct net_device *dev) | |
4215 | { | |
4216 | MGSLPC_INFO *info = dev_to_port(dev); | |
1da177e4 LT |
4217 | unsigned long flags; |
4218 | ||
4219 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4220 | printk("hdlcdev_tx_timeout(%s)\n",dev->name); | |
4221 | ||
198191c4 KH |
4222 | dev->stats.tx_errors++; |
4223 | dev->stats.tx_aborted_errors++; | |
1da177e4 LT |
4224 | |
4225 | spin_lock_irqsave(&info->lock,flags); | |
4226 | tx_stop(info); | |
4227 | spin_unlock_irqrestore(&info->lock,flags); | |
4228 | ||
4229 | netif_wake_queue(dev); | |
4230 | } | |
4231 | ||
4232 | /** | |
4233 | * called by device driver when transmit completes | |
4234 | * reenable network layer transmit if stopped | |
4235 | * | |
4236 | * info pointer to device instance information | |
4237 | */ | |
4238 | static void hdlcdev_tx_done(MGSLPC_INFO *info) | |
4239 | { | |
4240 | if (netif_queue_stopped(info->netdev)) | |
4241 | netif_wake_queue(info->netdev); | |
4242 | } | |
4243 | ||
4244 | /** | |
4245 | * called by device driver when frame received | |
4246 | * pass frame to network layer | |
4247 | * | |
4248 | * info pointer to device instance information | |
4249 | * buf pointer to buffer contianing frame data | |
4250 | * size count of data bytes in buf | |
4251 | */ | |
4252 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size) | |
4253 | { | |
4254 | struct sk_buff *skb = dev_alloc_skb(size); | |
4255 | struct net_device *dev = info->netdev; | |
1da177e4 LT |
4256 | |
4257 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4258 | printk("hdlcdev_rx(%s)\n",dev->name); | |
4259 | ||
4260 | if (skb == NULL) { | |
4261 | printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name); | |
198191c4 | 4262 | dev->stats.rx_dropped++; |
1da177e4 LT |
4263 | return; |
4264 | } | |
4265 | ||
198191c4 | 4266 | memcpy(skb_put(skb, size), buf, size); |
1da177e4 | 4267 | |
198191c4 | 4268 | skb->protocol = hdlc_type_trans(skb, dev); |
1da177e4 | 4269 | |
198191c4 KH |
4270 | dev->stats.rx_packets++; |
4271 | dev->stats.rx_bytes += size; | |
1da177e4 LT |
4272 | |
4273 | netif_rx(skb); | |
1da177e4 LT |
4274 | } |
4275 | ||
991990a1 KH |
4276 | static const struct net_device_ops hdlcdev_ops = { |
4277 | .ndo_open = hdlcdev_open, | |
4278 | .ndo_stop = hdlcdev_close, | |
4279 | .ndo_change_mtu = hdlc_change_mtu, | |
4280 | .ndo_start_xmit = hdlc_start_xmit, | |
4281 | .ndo_do_ioctl = hdlcdev_ioctl, | |
4282 | .ndo_tx_timeout = hdlcdev_tx_timeout, | |
4283 | }; | |
4284 | ||
1da177e4 LT |
4285 | /** |
4286 | * called by device driver when adding device instance | |
4287 | * do generic HDLC initialization | |
4288 | * | |
4289 | * info pointer to device instance information | |
4290 | * | |
4291 | * returns 0 if success, otherwise error code | |
4292 | */ | |
4293 | static int hdlcdev_init(MGSLPC_INFO *info) | |
4294 | { | |
4295 | int rc; | |
4296 | struct net_device *dev; | |
4297 | hdlc_device *hdlc; | |
4298 | ||
4299 | /* allocate and initialize network and HDLC layer objects */ | |
4300 | ||
4301 | if (!(dev = alloc_hdlcdev(info))) { | |
4302 | printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); | |
4303 | return -ENOMEM; | |
4304 | } | |
4305 | ||
4306 | /* for network layer reporting purposes only */ | |
4307 | dev->base_addr = info->io_base; | |
4308 | dev->irq = info->irq_level; | |
4309 | ||
4310 | /* network layer callbacks and settings */ | |
991990a1 KH |
4311 | dev->netdev_ops = &hdlcdev_ops; |
4312 | dev->watchdog_timeo = 10 * HZ; | |
1da177e4 LT |
4313 | dev->tx_queue_len = 50; |
4314 | ||
4315 | /* generic HDLC layer callbacks and settings */ | |
4316 | hdlc = dev_to_hdlc(dev); | |
4317 | hdlc->attach = hdlcdev_attach; | |
4318 | hdlc->xmit = hdlcdev_xmit; | |
4319 | ||
4320 | /* register objects with HDLC layer */ | |
4321 | if ((rc = register_hdlc_device(dev))) { | |
4322 | printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); | |
4323 | free_netdev(dev); | |
4324 | return rc; | |
4325 | } | |
4326 | ||
4327 | info->netdev = dev; | |
4328 | return 0; | |
4329 | } | |
4330 | ||
4331 | /** | |
4332 | * called by device driver when removing device instance | |
4333 | * do generic HDLC cleanup | |
4334 | * | |
4335 | * info pointer to device instance information | |
4336 | */ | |
4337 | static void hdlcdev_exit(MGSLPC_INFO *info) | |
4338 | { | |
4339 | unregister_hdlc_device(info->netdev); | |
4340 | free_netdev(info->netdev); | |
4341 | info->netdev = NULL; | |
4342 | } | |
4343 | ||
4344 | #endif /* CONFIG_HDLC */ | |
4345 |