2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
6 * Device driver for Microgate SyncLink PC Card
7 * multiprotocol serial adapter.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * This code is released under the GNU General Public License (GPL)
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.
29 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
31 # define BREAKPOINT() asm(" int $3");
33 # define BREAKPOINT() { }
36 #define MAX_DEVICE_COUNT 4
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>
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>
54 #include <linux/seq_file.h>
55 #include <linux/slab.h>
56 #include <linux/netdevice.h>
57 #include <linux/vmalloc.h>
58 #include <linux/init.h>
59 #include <linux/delay.h>
60 #include <linux/ioctl.h>
61 #include <linux/synclink.h>
66 #include <linux/bitops.h>
67 #include <asm/types.h>
68 #include <linux/termios.h>
69 #include <linux/workqueue.h>
70 #include <linux/hdlc.h>
72 #include <pcmcia/cistpl.h>
73 #include <pcmcia/cisreg.h>
74 #include <pcmcia/ds.h>
76 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE))
77 #define SYNCLINK_GENERIC_HDLC 1
79 #define SYNCLINK_GENERIC_HDLC 0
82 #define GET_USER(error,value,addr) error = get_user(value,addr)
83 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
84 #define PUT_USER(error,value,addr) error = put_user(value,addr)
85 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
87 #include <asm/uaccess.h>
89 static MGSL_PARAMS default_params
= {
90 MGSL_MODE_HDLC
, /* unsigned long mode */
91 0, /* unsigned char loopback; */
92 HDLC_FLAG_UNDERRUN_ABORT15
, /* unsigned short flags; */
93 HDLC_ENCODING_NRZI_SPACE
, /* unsigned char encoding; */
94 0, /* unsigned long clock_speed; */
95 0xff, /* unsigned char addr_filter; */
96 HDLC_CRC_16_CCITT
, /* unsigned short crc_type; */
97 HDLC_PREAMBLE_LENGTH_8BITS
, /* unsigned char preamble_length; */
98 HDLC_PREAMBLE_PATTERN_NONE
, /* unsigned char preamble; */
99 9600, /* unsigned long data_rate; */
100 8, /* unsigned char data_bits; */
101 1, /* unsigned char stop_bits; */
102 ASYNC_PARITY_NONE
/* unsigned char parity; */
108 unsigned char status
;
112 /* The queue of BH actions to be performed */
115 #define BH_TRANSMIT 2
118 #define IO_PIN_SHUTDOWN_LIMIT 100
120 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
122 struct _input_signal_events
{
135 * Device instance data structure
138 typedef struct _mgslpc_info
{
139 struct tty_port port
;
140 void *if_ptr
; /* General purpose pointer (used by SPPP) */
144 struct mgsl_icount icount
;
147 int x_char
; /* xon/xoff character */
148 unsigned char read_status_mask
;
149 unsigned char ignore_status_mask
;
151 unsigned char *tx_buf
;
156 /* circular list of fixed length rx buffers */
158 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
159 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
160 int rx_put
; /* index of next empty rx buffer */
161 int rx_get
; /* index of next full rx buffer */
162 int rx_buf_size
; /* size in bytes of single rx buffer */
163 int rx_buf_count
; /* total number of rx buffers */
164 int rx_frame_count
; /* number of full rx buffers */
166 wait_queue_head_t status_event_wait_q
;
167 wait_queue_head_t event_wait_q
;
168 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
169 struct _mgslpc_info
*next_device
; /* device list link */
171 unsigned short imra_value
;
172 unsigned short imrb_value
;
173 unsigned char pim_value
;
176 struct work_struct task
; /* task structure for scheduling bh */
185 int dcd_chkcount
; /* check counts to prevent */
186 int cts_chkcount
; /* too many IRQs if a signal */
187 int dsr_chkcount
; /* is floating */
198 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
200 char device_name
[25]; /* device instance name */
202 unsigned int io_base
; /* base I/O address of adapter */
203 unsigned int irq_level
;
205 MGSL_PARAMS params
; /* communications parameters */
207 unsigned char serial_signals
; /* current serial signal states */
209 bool irq_occurred
; /* for diagnostics use */
211 unsigned int init_error
; /* startup error (DIAGS) */
213 char flag_buf
[MAX_ASYNC_BUFFER_SIZE
];
214 bool drop_rts_on_tx_done
;
216 struct _input_signal_events input_signal_events
;
219 struct pcmcia_device
*p_dev
;
222 /* SPPP/Cisco HDLC device parts */
226 #if SYNCLINK_GENERIC_HDLC
227 struct net_device
*netdev
;
232 #define MGSLPC_MAGIC 0x5402
235 * The size of the serial xmit buffer is 1 page, or 4096 bytes
237 #define TXBUFSIZE 4096
240 #define CHA 0x00 /* channel A offset */
241 #define CHB 0x40 /* channel B offset */
244 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
291 #define IRQ_BREAK_ON BIT15 // rx break detected
292 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
293 #define IRQ_ALLSENT BIT13 // all sent
294 #define IRQ_UNDERRUN BIT12 // transmit data underrun
295 #define IRQ_TIMER BIT11 // timer interrupt
296 #define IRQ_CTS BIT10 // CTS status change
297 #define IRQ_TXREPEAT BIT9 // tx message repeat
298 #define IRQ_TXFIFO BIT8 // transmit pool ready
299 #define IRQ_RXEOM BIT7 // receive message end
300 #define IRQ_EXITHUNT BIT6 // receive frame start
301 #define IRQ_RXTIME BIT6 // rx char timeout
302 #define IRQ_DCD BIT2 // carrier detect status change
303 #define IRQ_OVERRUN BIT1 // receive frame overflow
304 #define IRQ_RXFIFO BIT0 // receive pool full
308 #define XFW BIT6 // transmit FIFO write enable
309 #define CEC BIT2 // command executing
310 #define CTS BIT1 // CTS state
315 #define PVR_AUTOCTS BIT3
316 #define PVR_RS232 0x20 /* 0010b */
317 #define PVR_V35 0xe0 /* 1110b */
318 #define PVR_RS422 0x40 /* 0100b */
320 /* Register access functions */
322 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
323 #define read_reg(info, reg) inb((info)->io_base + (reg))
325 #define read_reg16(info, reg) inw((info)->io_base + (reg))
326 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
328 #define set_reg_bits(info, reg, mask) \
329 write_reg(info, (reg), \
330 (unsigned char) (read_reg(info, (reg)) | (mask)))
331 #define clear_reg_bits(info, reg, mask) \
332 write_reg(info, (reg), \
333 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
335 * interrupt enable/disable routines
337 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
339 if (channel
== CHA
) {
340 info
->imra_value
|= mask
;
341 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
343 info
->imrb_value
|= mask
;
344 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
347 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
349 if (channel
== CHA
) {
350 info
->imra_value
&= ~mask
;
351 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
353 info
->imrb_value
&= ~mask
;
354 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
358 #define port_irq_disable(info, mask) \
359 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
361 #define port_irq_enable(info, mask) \
362 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
364 static void rx_start(MGSLPC_INFO
*info
);
365 static void rx_stop(MGSLPC_INFO
*info
);
367 static void tx_start(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
368 static void tx_stop(MGSLPC_INFO
*info
);
369 static void tx_set_idle(MGSLPC_INFO
*info
);
371 static void get_signals(MGSLPC_INFO
*info
);
372 static void set_signals(MGSLPC_INFO
*info
);
374 static void reset_device(MGSLPC_INFO
*info
);
376 static void hdlc_mode(MGSLPC_INFO
*info
);
377 static void async_mode(MGSLPC_INFO
*info
);
379 static void tx_timeout(unsigned long context
);
381 static int carrier_raised(struct tty_port
*port
);
382 static void dtr_rts(struct tty_port
*port
, int onoff
);
384 #if SYNCLINK_GENERIC_HDLC
385 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
386 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
387 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
388 static int hdlcdev_init(MGSLPC_INFO
*info
);
389 static void hdlcdev_exit(MGSLPC_INFO
*info
);
392 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
394 static bool register_test(MGSLPC_INFO
*info
);
395 static bool irq_test(MGSLPC_INFO
*info
);
396 static int adapter_test(MGSLPC_INFO
*info
);
398 static int claim_resources(MGSLPC_INFO
*info
);
399 static void release_resources(MGSLPC_INFO
*info
);
400 static void mgslpc_add_device(MGSLPC_INFO
*info
);
401 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
403 static bool rx_get_frame(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
404 static void rx_reset_buffers(MGSLPC_INFO
*info
);
405 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
406 static void rx_free_buffers(MGSLPC_INFO
*info
);
408 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
);
411 * Bottom half interrupt handlers
413 static void bh_handler(struct work_struct
*work
);
414 static void bh_transmit(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
415 static void bh_status(MGSLPC_INFO
*info
);
420 static int tiocmget(struct tty_struct
*tty
);
421 static int tiocmset(struct tty_struct
*tty
,
422 unsigned int set
, unsigned int clear
);
423 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
424 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
425 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
, struct tty_struct
*tty
);
426 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
427 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
428 static int set_txenable(MGSLPC_INFO
*info
, int enable
, struct tty_struct
*tty
);
429 static int tx_abort(MGSLPC_INFO
*info
);
430 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
431 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
433 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
434 static int mgslpc_device_count
= 0;
437 * Set this param to non-zero to load eax with the
438 * .text section address and breakpoint on module load.
439 * This is useful for use with gdb and add-symbol-file command.
441 static bool break_on_load
=0;
444 * Driver major number, defaults to zero to get auto
445 * assigned major number. May be forced as module parameter.
447 static int ttymajor
=0;
449 static int debug_level
= 0;
450 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
452 module_param(break_on_load
, bool, 0);
453 module_param(ttymajor
, int, 0);
454 module_param(debug_level
, int, 0);
455 module_param_array(maxframe
, int, NULL
, 0);
457 MODULE_LICENSE("GPL");
459 static char *driver_name
= "SyncLink PC Card driver";
460 static char *driver_version
= "$Revision: 4.34 $";
462 static struct tty_driver
*serial_driver
;
464 /* number of characters left in xmit buffer before we ask for more */
465 #define WAKEUP_CHARS 256
467 static void mgslpc_change_params(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
468 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
470 /* PCMCIA prototypes */
472 static int mgslpc_config(struct pcmcia_device
*link
);
473 static void mgslpc_release(u_long arg
);
474 static void mgslpc_detach(struct pcmcia_device
*p_dev
);
477 * 1st function defined in .text section. Calling this function in
478 * init_module() followed by a breakpoint allows a remote debugger
479 * (gdb) to get the .text address for the add-symbol-file command.
480 * This allows remote debugging of dynamically loadable modules.
482 static void* mgslpc_get_text_ptr(void)
484 return mgslpc_get_text_ptr
;
488 * line discipline callback wrappers
490 * The wrappers maintain line discipline references
491 * while calling into the line discipline.
493 * ldisc_receive_buf - pass receive data to line discipline
496 static void ldisc_receive_buf(struct tty_struct
*tty
,
497 const __u8
*data
, char *flags
, int count
)
499 struct tty_ldisc
*ld
;
502 ld
= tty_ldisc_ref(tty
);
504 if (ld
->ops
->receive_buf
)
505 ld
->ops
->receive_buf(tty
, data
, flags
, count
);
510 static const struct tty_port_operations mgslpc_port_ops
= {
511 .carrier_raised
= carrier_raised
,
515 static int mgslpc_probe(struct pcmcia_device
*link
)
520 if (debug_level
>= DEBUG_LEVEL_INFO
)
521 printk("mgslpc_attach\n");
523 info
= kzalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
525 printk("Error can't allocate device instance data\n");
529 info
->magic
= MGSLPC_MAGIC
;
530 tty_port_init(&info
->port
);
531 info
->port
.ops
= &mgslpc_port_ops
;
532 INIT_WORK(&info
->task
, bh_handler
);
533 info
->max_frame_size
= 4096;
534 info
->port
.close_delay
= 5*HZ
/10;
535 info
->port
.closing_wait
= 30*HZ
;
536 init_waitqueue_head(&info
->status_event_wait_q
);
537 init_waitqueue_head(&info
->event_wait_q
);
538 spin_lock_init(&info
->lock
);
539 spin_lock_init(&info
->netlock
);
540 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
541 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
542 info
->imra_value
= 0xffff;
543 info
->imrb_value
= 0xffff;
544 info
->pim_value
= 0xff;
549 /* Initialize the struct pcmcia_device structure */
551 ret
= mgslpc_config(link
);
555 mgslpc_add_device(info
);
560 /* Card has been inserted.
563 static int mgslpc_ioprobe(struct pcmcia_device
*p_dev
, void *priv_data
)
565 return pcmcia_request_io(p_dev
);
568 static int mgslpc_config(struct pcmcia_device
*link
)
570 MGSLPC_INFO
*info
= link
->priv
;
573 if (debug_level
>= DEBUG_LEVEL_INFO
)
574 printk("mgslpc_config(0x%p)\n", link
);
576 link
->config_flags
|= CONF_ENABLE_IRQ
| CONF_AUTO_SET_IO
;
578 ret
= pcmcia_loop_config(link
, mgslpc_ioprobe
, NULL
);
582 link
->config_index
= 8;
583 link
->config_regs
= PRESENT_OPTION
;
585 ret
= pcmcia_request_irq(link
, mgslpc_isr
);
588 ret
= pcmcia_enable_device(link
);
592 info
->io_base
= link
->resource
[0]->start
;
593 info
->irq_level
= link
->irq
;
597 mgslpc_release((u_long
)link
);
601 /* Card has been removed.
602 * Unregister device and release PCMCIA configuration.
603 * If device is open, postpone until it is closed.
605 static void mgslpc_release(u_long arg
)
607 struct pcmcia_device
*link
= (struct pcmcia_device
*)arg
;
609 if (debug_level
>= DEBUG_LEVEL_INFO
)
610 printk("mgslpc_release(0x%p)\n", link
);
612 pcmcia_disable_device(link
);
615 static void mgslpc_detach(struct pcmcia_device
*link
)
617 if (debug_level
>= DEBUG_LEVEL_INFO
)
618 printk("mgslpc_detach(0x%p)\n", link
);
620 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
621 mgslpc_release((u_long
)link
);
623 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
626 static int mgslpc_suspend(struct pcmcia_device
*link
)
628 MGSLPC_INFO
*info
= link
->priv
;
635 static int mgslpc_resume(struct pcmcia_device
*link
)
637 MGSLPC_INFO
*info
= link
->priv
;
645 static inline bool mgslpc_paranoia_check(MGSLPC_INFO
*info
,
646 char *name
, const char *routine
)
648 #ifdef MGSLPC_PARANOIA_CHECK
649 static const char *badmagic
=
650 "Warning: bad magic number for mgsl struct (%s) in %s\n";
651 static const char *badinfo
=
652 "Warning: null mgslpc_info for (%s) in %s\n";
655 printk(badinfo
, name
, routine
);
658 if (info
->magic
!= MGSLPC_MAGIC
) {
659 printk(badmagic
, name
, routine
);
670 #define CMD_RXFIFO BIT7 // release current rx FIFO
671 #define CMD_RXRESET BIT6 // receiver reset
672 #define CMD_RXFIFO_READ BIT5
673 #define CMD_START_TIMER BIT4
674 #define CMD_TXFIFO BIT3 // release current tx FIFO
675 #define CMD_TXEOM BIT1 // transmit end message
676 #define CMD_TXRESET BIT0 // transmit reset
678 static bool wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
681 /* wait for command completion */
682 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
690 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
692 wait_command_complete(info
, channel
);
693 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
696 static void tx_pause(struct tty_struct
*tty
)
698 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
701 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
703 if (debug_level
>= DEBUG_LEVEL_INFO
)
704 printk("tx_pause(%s)\n",info
->device_name
);
706 spin_lock_irqsave(&info
->lock
,flags
);
707 if (info
->tx_enabled
)
709 spin_unlock_irqrestore(&info
->lock
,flags
);
712 static void tx_release(struct tty_struct
*tty
)
714 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
717 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
719 if (debug_level
>= DEBUG_LEVEL_INFO
)
720 printk("tx_release(%s)\n",info
->device_name
);
722 spin_lock_irqsave(&info
->lock
,flags
);
723 if (!info
->tx_enabled
)
725 spin_unlock_irqrestore(&info
->lock
,flags
);
728 /* Return next bottom half action to perform.
729 * or 0 if nothing to do.
731 static int bh_action(MGSLPC_INFO
*info
)
736 spin_lock_irqsave(&info
->lock
,flags
);
738 if (info
->pending_bh
& BH_RECEIVE
) {
739 info
->pending_bh
&= ~BH_RECEIVE
;
741 } else if (info
->pending_bh
& BH_TRANSMIT
) {
742 info
->pending_bh
&= ~BH_TRANSMIT
;
744 } else if (info
->pending_bh
& BH_STATUS
) {
745 info
->pending_bh
&= ~BH_STATUS
;
750 /* Mark BH routine as complete */
751 info
->bh_running
= false;
752 info
->bh_requested
= false;
755 spin_unlock_irqrestore(&info
->lock
,flags
);
760 static void bh_handler(struct work_struct
*work
)
762 MGSLPC_INFO
*info
= container_of(work
, MGSLPC_INFO
, task
);
763 struct tty_struct
*tty
;
769 if (debug_level
>= DEBUG_LEVEL_BH
)
770 printk( "%s(%d):bh_handler(%s) entry\n",
771 __FILE__
,__LINE__
,info
->device_name
);
773 info
->bh_running
= true;
774 tty
= tty_port_tty_get(&info
->port
);
776 while((action
= bh_action(info
)) != 0) {
778 /* Process work item */
779 if ( debug_level
>= DEBUG_LEVEL_BH
)
780 printk( "%s(%d):bh_handler() work item action=%d\n",
781 __FILE__
,__LINE__
,action
);
786 while(rx_get_frame(info
, tty
));
789 bh_transmit(info
, tty
);
795 /* unknown work item ID */
796 printk("Unknown work item ID=%08X!\n", action
);
802 if (debug_level
>= DEBUG_LEVEL_BH
)
803 printk( "%s(%d):bh_handler(%s) exit\n",
804 __FILE__
,__LINE__
,info
->device_name
);
807 static void bh_transmit(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
809 if (debug_level
>= DEBUG_LEVEL_BH
)
810 printk("bh_transmit() entry on %s\n", info
->device_name
);
816 static void bh_status(MGSLPC_INFO
*info
)
818 info
->ri_chkcount
= 0;
819 info
->dsr_chkcount
= 0;
820 info
->dcd_chkcount
= 0;
821 info
->cts_chkcount
= 0;
824 /* eom: non-zero = end of frame */
825 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
827 unsigned char data
[2];
828 unsigned char fifo_count
, read_count
, i
;
829 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
831 if (debug_level
>= DEBUG_LEVEL_ISR
)
832 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__
,__LINE__
,eom
);
834 if (!info
->rx_enabled
)
837 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
838 /* no more free buffers */
839 issue_command(info
, CHA
, CMD_RXRESET
);
840 info
->pending_bh
|= BH_RECEIVE
;
841 info
->rx_overflow
= true;
842 info
->icount
.buf_overrun
++;
847 /* end of frame, get FIFO count from RBCL register */
848 if (!(fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f)))
854 if (fifo_count
== 1) {
856 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
859 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
861 fifo_count
-= read_count
;
862 if (!fifo_count
&& eom
)
863 buf
->status
= data
[--read_count
];
865 for (i
= 0; i
< read_count
; i
++) {
866 if (buf
->count
>= info
->max_frame_size
) {
867 /* frame too large, reset receiver and reset current buffer */
868 issue_command(info
, CHA
, CMD_RXRESET
);
872 *(buf
->data
+ buf
->count
) = data
[i
];
875 } while (fifo_count
);
878 info
->pending_bh
|= BH_RECEIVE
;
879 info
->rx_frame_count
++;
881 if (info
->rx_put
>= info
->rx_buf_count
)
884 issue_command(info
, CHA
, CMD_RXFIFO
);
887 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
, struct tty_struct
*tty
)
889 unsigned char data
, status
, flag
;
892 struct mgsl_icount
*icount
= &info
->icount
;
895 /* early termination, get FIFO count from RBCL register */
896 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
898 /* Zero fifo count could mean 0 or 32 bytes available.
899 * If BIT5 of STAR is set then at least 1 byte is available.
901 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
906 tty_buffer_request_room(tty
, fifo_count
);
907 /* Flush received async data to receive data buffer. */
909 data
= read_reg(info
, CHA
+ RXFIFO
);
910 status
= read_reg(info
, CHA
+ RXFIFO
);
916 // if no frameing/crc error then save data
918 // BIT6:framing error
920 if (status
& (BIT7
+ BIT6
)) {
926 /* discard char if tty control flags say so */
927 if (status
& info
->ignore_status_mask
)
930 status
&= info
->read_status_mask
;
934 else if (status
& BIT6
)
937 work
+= tty_insert_flip_char(tty
, data
, flag
);
939 issue_command(info
, CHA
, CMD_RXFIFO
);
941 if (debug_level
>= DEBUG_LEVEL_ISR
) {
942 printk("%s(%d):rx_ready_async",
944 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
945 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
946 icount
->parity
,icount
->frame
,icount
->overrun
);
950 tty_flip_buffer_push(tty
);
954 static void tx_done(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
956 if (!info
->tx_active
)
959 info
->tx_active
= false;
960 info
->tx_aborting
= false;
962 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
965 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
966 del_timer(&info
->tx_timer
);
968 if (info
->drop_rts_on_tx_done
) {
970 if (info
->serial_signals
& SerialSignal_RTS
) {
971 info
->serial_signals
&= ~SerialSignal_RTS
;
974 info
->drop_rts_on_tx_done
= false;
977 #if SYNCLINK_GENERIC_HDLC
979 hdlcdev_tx_done(info
);
983 if (tty
->stopped
|| tty
->hw_stopped
) {
987 info
->pending_bh
|= BH_TRANSMIT
;
991 static void tx_ready(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
993 unsigned char fifo_count
= 32;
996 if (debug_level
>= DEBUG_LEVEL_ISR
)
997 printk("%s(%d):tx_ready(%s)\n", __FILE__
,__LINE__
,info
->device_name
);
999 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1000 if (!info
->tx_active
)
1003 if (tty
->stopped
|| tty
->hw_stopped
) {
1007 if (!info
->tx_count
)
1008 info
->tx_active
= false;
1011 if (!info
->tx_count
)
1014 while (info
->tx_count
&& fifo_count
) {
1015 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1018 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1020 write_reg16(info
, CHA
+ TXFIFO
,
1021 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1023 info
->tx_count
-= c
;
1024 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1028 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1029 if (info
->tx_count
< WAKEUP_CHARS
)
1030 info
->pending_bh
|= BH_TRANSMIT
;
1031 issue_command(info
, CHA
, CMD_TXFIFO
);
1034 issue_command(info
, CHA
, CMD_TXFIFO
);
1036 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1040 static void cts_change(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1043 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1044 irq_disable(info
, CHB
, IRQ_CTS
);
1046 if (info
->serial_signals
& SerialSignal_CTS
)
1047 info
->input_signal_events
.cts_up
++;
1049 info
->input_signal_events
.cts_down
++;
1050 wake_up_interruptible(&info
->status_event_wait_q
);
1051 wake_up_interruptible(&info
->event_wait_q
);
1053 if (info
->port
.flags
& ASYNC_CTS_FLOW
) {
1054 if (tty
->hw_stopped
) {
1055 if (info
->serial_signals
& SerialSignal_CTS
) {
1056 if (debug_level
>= DEBUG_LEVEL_ISR
)
1057 printk("CTS tx start...");
1059 tty
->hw_stopped
= 0;
1060 tx_start(info
, tty
);
1061 info
->pending_bh
|= BH_TRANSMIT
;
1065 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1066 if (debug_level
>= DEBUG_LEVEL_ISR
)
1067 printk("CTS tx stop...");
1069 tty
->hw_stopped
= 1;
1074 info
->pending_bh
|= BH_STATUS
;
1077 static void dcd_change(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1080 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1081 irq_disable(info
, CHB
, IRQ_DCD
);
1083 if (info
->serial_signals
& SerialSignal_DCD
) {
1084 info
->input_signal_events
.dcd_up
++;
1087 info
->input_signal_events
.dcd_down
++;
1088 #if SYNCLINK_GENERIC_HDLC
1089 if (info
->netcount
) {
1090 if (info
->serial_signals
& SerialSignal_DCD
)
1091 netif_carrier_on(info
->netdev
);
1093 netif_carrier_off(info
->netdev
);
1096 wake_up_interruptible(&info
->status_event_wait_q
);
1097 wake_up_interruptible(&info
->event_wait_q
);
1099 if (info
->port
.flags
& ASYNC_CHECK_CD
) {
1100 if (debug_level
>= DEBUG_LEVEL_ISR
)
1101 printk("%s CD now %s...", info
->device_name
,
1102 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1103 if (info
->serial_signals
& SerialSignal_DCD
)
1104 wake_up_interruptible(&info
->port
.open_wait
);
1106 if (debug_level
>= DEBUG_LEVEL_ISR
)
1107 printk("doing serial hangup...");
1112 info
->pending_bh
|= BH_STATUS
;
1115 static void dsr_change(MGSLPC_INFO
*info
)
1118 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1119 port_irq_disable(info
, PVR_DSR
);
1121 if (info
->serial_signals
& SerialSignal_DSR
)
1122 info
->input_signal_events
.dsr_up
++;
1124 info
->input_signal_events
.dsr_down
++;
1125 wake_up_interruptible(&info
->status_event_wait_q
);
1126 wake_up_interruptible(&info
->event_wait_q
);
1127 info
->pending_bh
|= BH_STATUS
;
1130 static void ri_change(MGSLPC_INFO
*info
)
1133 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1134 port_irq_disable(info
, PVR_RI
);
1136 if (info
->serial_signals
& SerialSignal_RI
)
1137 info
->input_signal_events
.ri_up
++;
1139 info
->input_signal_events
.ri_down
++;
1140 wake_up_interruptible(&info
->status_event_wait_q
);
1141 wake_up_interruptible(&info
->event_wait_q
);
1142 info
->pending_bh
|= BH_STATUS
;
1145 /* Interrupt service routine entry point.
1149 * irq interrupt number that caused interrupt
1150 * dev_id device ID supplied during interrupt registration
1152 static irqreturn_t
mgslpc_isr(int dummy
, void *dev_id
)
1154 MGSLPC_INFO
*info
= dev_id
;
1155 struct tty_struct
*tty
;
1157 unsigned char gis
, pis
;
1160 if (debug_level
>= DEBUG_LEVEL_ISR
)
1161 printk("mgslpc_isr(%d) entry.\n", info
->irq_level
);
1163 if (!(info
->p_dev
->_locked
))
1166 tty
= tty_port_tty_get(&info
->port
);
1168 spin_lock(&info
->lock
);
1170 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1171 if (debug_level
>= DEBUG_LEVEL_ISR
)
1172 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1174 if ((gis
& 0x70) || count
> 1000) {
1175 printk("synclink_cs:hardware failed or ejected\n");
1180 if (gis
& (BIT1
+ BIT0
)) {
1181 isr
= read_reg16(info
, CHB
+ ISR
);
1183 dcd_change(info
, tty
);
1185 cts_change(info
, tty
);
1187 if (gis
& (BIT3
+ BIT2
))
1189 isr
= read_reg16(info
, CHA
+ ISR
);
1190 if (isr
& IRQ_TIMER
) {
1191 info
->irq_occurred
= true;
1192 irq_disable(info
, CHA
, IRQ_TIMER
);
1196 if (isr
& IRQ_EXITHUNT
) {
1197 info
->icount
.exithunt
++;
1198 wake_up_interruptible(&info
->event_wait_q
);
1200 if (isr
& IRQ_BREAK_ON
) {
1202 if (info
->port
.flags
& ASYNC_SAK
)
1205 if (isr
& IRQ_RXTIME
) {
1206 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1208 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1209 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1210 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1212 rx_ready_async(info
, isr
& IRQ_RXEOM
, tty
);
1216 if (isr
& IRQ_UNDERRUN
) {
1217 if (info
->tx_aborting
)
1218 info
->icount
.txabort
++;
1220 info
->icount
.txunder
++;
1223 else if (isr
& IRQ_ALLSENT
) {
1224 info
->icount
.txok
++;
1227 else if (isr
& IRQ_TXFIFO
)
1228 tx_ready(info
, tty
);
1231 pis
= read_reg(info
, CHA
+ PIS
);
1239 /* Request bottom half processing if there's something
1240 * for it to do and the bh is not already running
1243 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1244 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1245 printk("%s(%d):%s queueing bh task.\n",
1246 __FILE__
,__LINE__
,info
->device_name
);
1247 schedule_work(&info
->task
);
1248 info
->bh_requested
= true;
1251 spin_unlock(&info
->lock
);
1254 if (debug_level
>= DEBUG_LEVEL_ISR
)
1255 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1256 __FILE__
, __LINE__
, info
->irq_level
);
1261 /* Initialize and start device.
1263 static int startup(MGSLPC_INFO
* info
, struct tty_struct
*tty
)
1267 if (debug_level
>= DEBUG_LEVEL_INFO
)
1268 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1270 if (info
->port
.flags
& ASYNC_INITIALIZED
)
1273 if (!info
->tx_buf
) {
1274 /* allocate a page of memory for a transmit buffer */
1275 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1276 if (!info
->tx_buf
) {
1277 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1278 __FILE__
,__LINE__
,info
->device_name
);
1283 info
->pending_bh
= 0;
1285 memset(&info
->icount
, 0, sizeof(info
->icount
));
1287 setup_timer(&info
->tx_timer
, tx_timeout
, (unsigned long)info
);
1289 /* Allocate and claim adapter resources */
1290 retval
= claim_resources(info
);
1292 /* perform existence check and diagnostics */
1294 retval
= adapter_test(info
);
1297 if (capable(CAP_SYS_ADMIN
) && tty
)
1298 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1299 release_resources(info
);
1303 /* program hardware for current parameters */
1304 mgslpc_change_params(info
, tty
);
1307 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
1309 info
->port
.flags
|= ASYNC_INITIALIZED
;
1314 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1316 static void shutdown(MGSLPC_INFO
* info
, struct tty_struct
*tty
)
1318 unsigned long flags
;
1320 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
1323 if (debug_level
>= DEBUG_LEVEL_INFO
)
1324 printk("%s(%d):mgslpc_shutdown(%s)\n",
1325 __FILE__
,__LINE__
, info
->device_name
);
1327 /* clear status wait queue because status changes */
1328 /* can't happen after shutting down the hardware */
1329 wake_up_interruptible(&info
->status_event_wait_q
);
1330 wake_up_interruptible(&info
->event_wait_q
);
1332 del_timer_sync(&info
->tx_timer
);
1335 free_page((unsigned long) info
->tx_buf
);
1336 info
->tx_buf
= NULL
;
1339 spin_lock_irqsave(&info
->lock
,flags
);
1344 /* TODO:disable interrupts instead of reset to preserve signal states */
1347 if (!tty
|| tty
->termios
.c_cflag
& HUPCL
) {
1348 info
->serial_signals
&= ~(SerialSignal_DTR
+ SerialSignal_RTS
);
1352 spin_unlock_irqrestore(&info
->lock
,flags
);
1354 release_resources(info
);
1357 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1359 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1362 static void mgslpc_program_hw(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1364 unsigned long flags
;
1366 spin_lock_irqsave(&info
->lock
,flags
);
1370 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1372 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1379 info
->dcd_chkcount
= 0;
1380 info
->cts_chkcount
= 0;
1381 info
->ri_chkcount
= 0;
1382 info
->dsr_chkcount
= 0;
1384 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1385 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1388 if (info
->netcount
|| (tty
&& (tty
->termios
.c_cflag
& CREAD
)))
1391 spin_unlock_irqrestore(&info
->lock
,flags
);
1394 /* Reconfigure adapter based on new parameters
1396 static void mgslpc_change_params(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1404 if (debug_level
>= DEBUG_LEVEL_INFO
)
1405 printk("%s(%d):mgslpc_change_params(%s)\n",
1406 __FILE__
,__LINE__
, info
->device_name
);
1408 cflag
= tty
->termios
.c_cflag
;
1410 /* if B0 rate (hangup) specified then negate DTR and RTS */
1411 /* otherwise assert DTR and RTS */
1413 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
1415 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
1417 /* byte size and parity */
1419 switch (cflag
& CSIZE
) {
1420 case CS5
: info
->params
.data_bits
= 5; break;
1421 case CS6
: info
->params
.data_bits
= 6; break;
1422 case CS7
: info
->params
.data_bits
= 7; break;
1423 case CS8
: info
->params
.data_bits
= 8; break;
1424 default: info
->params
.data_bits
= 7; break;
1428 info
->params
.stop_bits
= 2;
1430 info
->params
.stop_bits
= 1;
1432 info
->params
.parity
= ASYNC_PARITY_NONE
;
1433 if (cflag
& PARENB
) {
1435 info
->params
.parity
= ASYNC_PARITY_ODD
;
1437 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1440 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1444 /* calculate number of jiffies to transmit a full
1445 * FIFO (32 bytes) at specified data rate
1447 bits_per_char
= info
->params
.data_bits
+
1448 info
->params
.stop_bits
+ 1;
1450 /* if port data rate is set to 460800 or less then
1451 * allow tty settings to override, otherwise keep the
1452 * current data rate.
1454 if (info
->params
.data_rate
<= 460800) {
1455 info
->params
.data_rate
= tty_get_baud_rate(tty
);
1458 if ( info
->params
.data_rate
) {
1459 info
->timeout
= (32*HZ
*bits_per_char
) /
1460 info
->params
.data_rate
;
1462 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1464 if (cflag
& CRTSCTS
)
1465 info
->port
.flags
|= ASYNC_CTS_FLOW
;
1467 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
1470 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
1472 info
->port
.flags
|= ASYNC_CHECK_CD
;
1474 /* process tty input control flags */
1476 info
->read_status_mask
= 0;
1478 info
->read_status_mask
|= BIT7
| BIT6
;
1480 info
->ignore_status_mask
|= BIT7
| BIT6
;
1482 mgslpc_program_hw(info
, tty
);
1485 /* Add a character to the transmit buffer
1487 static int mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1489 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1490 unsigned long flags
;
1492 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1493 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1494 __FILE__
,__LINE__
,ch
,info
->device_name
);
1497 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1503 spin_lock_irqsave(&info
->lock
,flags
);
1505 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1506 if (info
->tx_count
< TXBUFSIZE
- 1) {
1507 info
->tx_buf
[info
->tx_put
++] = ch
;
1508 info
->tx_put
&= TXBUFSIZE
-1;
1513 spin_unlock_irqrestore(&info
->lock
,flags
);
1517 /* Enable transmitter so remaining characters in the
1518 * transmit buffer are sent.
1520 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1522 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1523 unsigned long flags
;
1525 if (debug_level
>= DEBUG_LEVEL_INFO
)
1526 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1527 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1529 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1532 if (info
->tx_count
<= 0 || tty
->stopped
||
1533 tty
->hw_stopped
|| !info
->tx_buf
)
1536 if (debug_level
>= DEBUG_LEVEL_INFO
)
1537 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1538 __FILE__
,__LINE__
,info
->device_name
);
1540 spin_lock_irqsave(&info
->lock
,flags
);
1541 if (!info
->tx_active
)
1542 tx_start(info
, tty
);
1543 spin_unlock_irqrestore(&info
->lock
,flags
);
1546 /* Send a block of data
1550 * tty pointer to tty information structure
1551 * buf pointer to buffer containing send data
1552 * count size of send data in bytes
1554 * Returns: number of characters written
1556 static int mgslpc_write(struct tty_struct
* tty
,
1557 const unsigned char *buf
, int count
)
1560 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1561 unsigned long flags
;
1563 if (debug_level
>= DEBUG_LEVEL_INFO
)
1564 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1565 __FILE__
,__LINE__
,info
->device_name
,count
);
1567 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1571 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1572 if (count
> TXBUFSIZE
) {
1576 if (info
->tx_active
)
1578 else if (info
->tx_count
)
1584 min(TXBUFSIZE
- info
->tx_count
- 1,
1585 TXBUFSIZE
- info
->tx_put
));
1589 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1591 spin_lock_irqsave(&info
->lock
,flags
);
1592 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1593 info
->tx_count
+= c
;
1594 spin_unlock_irqrestore(&info
->lock
,flags
);
1601 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
1602 spin_lock_irqsave(&info
->lock
,flags
);
1603 if (!info
->tx_active
)
1604 tx_start(info
, tty
);
1605 spin_unlock_irqrestore(&info
->lock
,flags
);
1608 if (debug_level
>= DEBUG_LEVEL_INFO
)
1609 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1610 __FILE__
,__LINE__
,info
->device_name
,ret
);
1614 /* Return the count of free bytes in transmit buffer
1616 static int mgslpc_write_room(struct tty_struct
*tty
)
1618 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1621 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1624 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1625 /* HDLC (frame oriented) mode */
1626 if (info
->tx_active
)
1629 return HDLC_MAX_FRAME_SIZE
;
1631 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1636 if (debug_level
>= DEBUG_LEVEL_INFO
)
1637 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1638 __FILE__
,__LINE__
, info
->device_name
, ret
);
1642 /* Return the count of bytes in transmit buffer
1644 static int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1646 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1649 if (debug_level
>= DEBUG_LEVEL_INFO
)
1650 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1651 __FILE__
,__LINE__
, info
->device_name
);
1653 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1656 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1657 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1659 rc
= info
->tx_count
;
1661 if (debug_level
>= DEBUG_LEVEL_INFO
)
1662 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1663 __FILE__
,__LINE__
, info
->device_name
, rc
);
1668 /* Discard all data in the send buffer
1670 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1672 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1673 unsigned long flags
;
1675 if (debug_level
>= DEBUG_LEVEL_INFO
)
1676 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1677 __FILE__
,__LINE__
, info
->device_name
);
1679 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1682 spin_lock_irqsave(&info
->lock
,flags
);
1683 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1684 del_timer(&info
->tx_timer
);
1685 spin_unlock_irqrestore(&info
->lock
,flags
);
1687 wake_up_interruptible(&tty
->write_wait
);
1691 /* Send a high-priority XON/XOFF character
1693 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1695 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1696 unsigned long flags
;
1698 if (debug_level
>= DEBUG_LEVEL_INFO
)
1699 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1700 __FILE__
,__LINE__
, info
->device_name
, ch
);
1702 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1707 spin_lock_irqsave(&info
->lock
,flags
);
1708 if (!info
->tx_enabled
)
1709 tx_start(info
, tty
);
1710 spin_unlock_irqrestore(&info
->lock
,flags
);
1714 /* Signal remote device to throttle send data (our receive data)
1716 static void mgslpc_throttle(struct tty_struct
* tty
)
1718 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1719 unsigned long flags
;
1721 if (debug_level
>= DEBUG_LEVEL_INFO
)
1722 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1723 __FILE__
,__LINE__
, info
->device_name
);
1725 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1729 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1731 if (tty
->termios
.c_cflag
& CRTSCTS
) {
1732 spin_lock_irqsave(&info
->lock
,flags
);
1733 info
->serial_signals
&= ~SerialSignal_RTS
;
1735 spin_unlock_irqrestore(&info
->lock
,flags
);
1739 /* Signal remote device to stop throttling send data (our receive data)
1741 static void mgslpc_unthrottle(struct tty_struct
* tty
)
1743 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1744 unsigned long flags
;
1746 if (debug_level
>= DEBUG_LEVEL_INFO
)
1747 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1748 __FILE__
,__LINE__
, info
->device_name
);
1750 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1757 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1760 if (tty
->termios
.c_cflag
& CRTSCTS
) {
1761 spin_lock_irqsave(&info
->lock
,flags
);
1762 info
->serial_signals
|= SerialSignal_RTS
;
1764 spin_unlock_irqrestore(&info
->lock
,flags
);
1768 /* get the current serial statistics
1770 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1773 if (debug_level
>= DEBUG_LEVEL_INFO
)
1774 printk("get_params(%s)\n", info
->device_name
);
1776 memset(&info
->icount
, 0, sizeof(info
->icount
));
1778 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1785 /* get the current serial parameters
1787 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1790 if (debug_level
>= DEBUG_LEVEL_INFO
)
1791 printk("get_params(%s)\n", info
->device_name
);
1792 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1798 /* set the serial parameters
1802 * info pointer to device instance data
1803 * new_params user buffer containing new serial params
1805 * Returns: 0 if success, otherwise error code
1807 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
, struct tty_struct
*tty
)
1809 unsigned long flags
;
1810 MGSL_PARAMS tmp_params
;
1813 if (debug_level
>= DEBUG_LEVEL_INFO
)
1814 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1815 info
->device_name
);
1816 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1818 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1819 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1820 __FILE__
,__LINE__
,info
->device_name
);
1824 spin_lock_irqsave(&info
->lock
,flags
);
1825 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
1826 spin_unlock_irqrestore(&info
->lock
,flags
);
1828 mgslpc_change_params(info
, tty
);
1833 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
1836 if (debug_level
>= DEBUG_LEVEL_INFO
)
1837 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
1838 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
1844 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
1846 unsigned long flags
;
1847 if (debug_level
>= DEBUG_LEVEL_INFO
)
1848 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
1849 spin_lock_irqsave(&info
->lock
,flags
);
1850 info
->idle_mode
= idle_mode
;
1852 spin_unlock_irqrestore(&info
->lock
,flags
);
1856 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
1859 if (debug_level
>= DEBUG_LEVEL_INFO
)
1860 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
1861 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
1867 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
1869 unsigned long flags
;
1871 if (debug_level
>= DEBUG_LEVEL_INFO
)
1872 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
1873 spin_lock_irqsave(&info
->lock
,flags
);
1874 info
->if_mode
= if_mode
;
1876 val
= read_reg(info
, PVR
) & 0x0f;
1877 switch (info
->if_mode
)
1879 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
1880 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
1881 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
1883 write_reg(info
, PVR
, val
);
1885 spin_unlock_irqrestore(&info
->lock
,flags
);
1889 static int set_txenable(MGSLPC_INFO
* info
, int enable
, struct tty_struct
*tty
)
1891 unsigned long flags
;
1893 if (debug_level
>= DEBUG_LEVEL_INFO
)
1894 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
1896 spin_lock_irqsave(&info
->lock
,flags
);
1898 if (!info
->tx_enabled
)
1899 tx_start(info
, tty
);
1901 if (info
->tx_enabled
)
1904 spin_unlock_irqrestore(&info
->lock
,flags
);
1908 static int tx_abort(MGSLPC_INFO
* info
)
1910 unsigned long flags
;
1912 if (debug_level
>= DEBUG_LEVEL_INFO
)
1913 printk("tx_abort(%s)\n", info
->device_name
);
1915 spin_lock_irqsave(&info
->lock
,flags
);
1916 if (info
->tx_active
&& info
->tx_count
&&
1917 info
->params
.mode
== MGSL_MODE_HDLC
) {
1918 /* clear data count so FIFO is not filled on next IRQ.
1919 * This results in underrun and abort transmission.
1921 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1922 info
->tx_aborting
= true;
1924 spin_unlock_irqrestore(&info
->lock
,flags
);
1928 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
1930 unsigned long flags
;
1932 if (debug_level
>= DEBUG_LEVEL_INFO
)
1933 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
1935 spin_lock_irqsave(&info
->lock
,flags
);
1937 if (!info
->rx_enabled
)
1940 if (info
->rx_enabled
)
1943 spin_unlock_irqrestore(&info
->lock
,flags
);
1947 /* wait for specified event to occur
1949 * Arguments: info pointer to device instance data
1950 * mask pointer to bitmask of events to wait for
1951 * Return Value: 0 if successful and bit mask updated with
1952 * of events triggerred,
1953 * otherwise error code
1955 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
1957 unsigned long flags
;
1960 struct mgsl_icount cprev
, cnow
;
1963 struct _input_signal_events oldsigs
, newsigs
;
1964 DECLARE_WAITQUEUE(wait
, current
);
1966 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
1970 if (debug_level
>= DEBUG_LEVEL_INFO
)
1971 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
1973 spin_lock_irqsave(&info
->lock
,flags
);
1975 /* return immediately if state matches requested events */
1977 s
= info
->serial_signals
;
1979 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
1980 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
1981 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
1982 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
1984 spin_unlock_irqrestore(&info
->lock
,flags
);
1988 /* save current irq counts */
1989 cprev
= info
->icount
;
1990 oldsigs
= info
->input_signal_events
;
1992 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
1993 (mask
& MgslEvent_ExitHuntMode
))
1994 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
1996 set_current_state(TASK_INTERRUPTIBLE
);
1997 add_wait_queue(&info
->event_wait_q
, &wait
);
1999 spin_unlock_irqrestore(&info
->lock
,flags
);
2004 if (signal_pending(current
)) {
2009 /* get current irq counts */
2010 spin_lock_irqsave(&info
->lock
,flags
);
2011 cnow
= info
->icount
;
2012 newsigs
= info
->input_signal_events
;
2013 set_current_state(TASK_INTERRUPTIBLE
);
2014 spin_unlock_irqrestore(&info
->lock
,flags
);
2016 /* if no change, wait aborted for some reason */
2017 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2018 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2019 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2020 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2021 newsigs
.cts_up
== oldsigs
.cts_up
&&
2022 newsigs
.cts_down
== oldsigs
.cts_down
&&
2023 newsigs
.ri_up
== oldsigs
.ri_up
&&
2024 newsigs
.ri_down
== oldsigs
.ri_down
&&
2025 cnow
.exithunt
== cprev
.exithunt
&&
2026 cnow
.rxidle
== cprev
.rxidle
) {
2032 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2033 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2034 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2035 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2036 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2037 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2038 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2039 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2040 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2041 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2049 remove_wait_queue(&info
->event_wait_q
, &wait
);
2050 set_current_state(TASK_RUNNING
);
2052 if (mask
& MgslEvent_ExitHuntMode
) {
2053 spin_lock_irqsave(&info
->lock
,flags
);
2054 if (!waitqueue_active(&info
->event_wait_q
))
2055 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2056 spin_unlock_irqrestore(&info
->lock
,flags
);
2060 PUT_USER(rc
, events
, mask_ptr
);
2064 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2066 unsigned long flags
;
2068 struct mgsl_icount cprev
, cnow
;
2069 DECLARE_WAITQUEUE(wait
, current
);
2071 /* save current irq counts */
2072 spin_lock_irqsave(&info
->lock
,flags
);
2073 cprev
= info
->icount
;
2074 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2075 set_current_state(TASK_INTERRUPTIBLE
);
2076 spin_unlock_irqrestore(&info
->lock
,flags
);
2080 if (signal_pending(current
)) {
2085 /* get new irq counts */
2086 spin_lock_irqsave(&info
->lock
,flags
);
2087 cnow
= info
->icount
;
2088 set_current_state(TASK_INTERRUPTIBLE
);
2089 spin_unlock_irqrestore(&info
->lock
,flags
);
2091 /* if no change, wait aborted for some reason */
2092 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2093 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2098 /* check for change in caller specified modem input */
2099 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2100 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2101 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2102 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2109 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2110 set_current_state(TASK_RUNNING
);
2114 /* return the state of the serial control and status signals
2116 static int tiocmget(struct tty_struct
*tty
)
2118 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2119 unsigned int result
;
2120 unsigned long flags
;
2122 spin_lock_irqsave(&info
->lock
,flags
);
2124 spin_unlock_irqrestore(&info
->lock
,flags
);
2126 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2127 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2128 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2129 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2130 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2131 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2133 if (debug_level
>= DEBUG_LEVEL_INFO
)
2134 printk("%s(%d):%s tiocmget() value=%08X\n",
2135 __FILE__
,__LINE__
, info
->device_name
, result
);
2139 /* set modem control signals (DTR/RTS)
2141 static int tiocmset(struct tty_struct
*tty
,
2142 unsigned int set
, unsigned int clear
)
2144 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2145 unsigned long flags
;
2147 if (debug_level
>= DEBUG_LEVEL_INFO
)
2148 printk("%s(%d):%s tiocmset(%x,%x)\n",
2149 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
2151 if (set
& TIOCM_RTS
)
2152 info
->serial_signals
|= SerialSignal_RTS
;
2153 if (set
& TIOCM_DTR
)
2154 info
->serial_signals
|= SerialSignal_DTR
;
2155 if (clear
& TIOCM_RTS
)
2156 info
->serial_signals
&= ~SerialSignal_RTS
;
2157 if (clear
& TIOCM_DTR
)
2158 info
->serial_signals
&= ~SerialSignal_DTR
;
2160 spin_lock_irqsave(&info
->lock
,flags
);
2162 spin_unlock_irqrestore(&info
->lock
,flags
);
2167 /* Set or clear transmit break condition
2169 * Arguments: tty pointer to tty instance data
2170 * break_state -1=set break condition, 0=clear
2172 static int mgslpc_break(struct tty_struct
*tty
, int break_state
)
2174 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2175 unsigned long flags
;
2177 if (debug_level
>= DEBUG_LEVEL_INFO
)
2178 printk("%s(%d):mgslpc_break(%s,%d)\n",
2179 __FILE__
,__LINE__
, info
->device_name
, break_state
);
2181 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2184 spin_lock_irqsave(&info
->lock
,flags
);
2185 if (break_state
== -1)
2186 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2188 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2189 spin_unlock_irqrestore(&info
->lock
,flags
);
2193 static int mgslpc_get_icount(struct tty_struct
*tty
,
2194 struct serial_icounter_struct
*icount
)
2196 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2197 struct mgsl_icount cnow
; /* kernel counter temps */
2198 unsigned long flags
;
2200 spin_lock_irqsave(&info
->lock
,flags
);
2201 cnow
= info
->icount
;
2202 spin_unlock_irqrestore(&info
->lock
,flags
);
2204 icount
->cts
= cnow
.cts
;
2205 icount
->dsr
= cnow
.dsr
;
2206 icount
->rng
= cnow
.rng
;
2207 icount
->dcd
= cnow
.dcd
;
2208 icount
->rx
= cnow
.rx
;
2209 icount
->tx
= cnow
.tx
;
2210 icount
->frame
= cnow
.frame
;
2211 icount
->overrun
= cnow
.overrun
;
2212 icount
->parity
= cnow
.parity
;
2213 icount
->brk
= cnow
.brk
;
2214 icount
->buf_overrun
= cnow
.buf_overrun
;
2219 /* Service an IOCTL request
2223 * tty pointer to tty instance data
2224 * cmd IOCTL command code
2225 * arg command argument/context
2227 * Return Value: 0 if success, otherwise error code
2229 static int mgslpc_ioctl(struct tty_struct
*tty
,
2230 unsigned int cmd
, unsigned long arg
)
2232 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2233 void __user
*argp
= (void __user
*)arg
;
2235 if (debug_level
>= DEBUG_LEVEL_INFO
)
2236 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2237 info
->device_name
, cmd
);
2239 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2242 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2243 (cmd
!= TIOCMIWAIT
)) {
2244 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2249 case MGSL_IOCGPARAMS
:
2250 return get_params(info
, argp
);
2251 case MGSL_IOCSPARAMS
:
2252 return set_params(info
, argp
, tty
);
2253 case MGSL_IOCGTXIDLE
:
2254 return get_txidle(info
, argp
);
2255 case MGSL_IOCSTXIDLE
:
2256 return set_txidle(info
, (int)arg
);
2258 return get_interface(info
, argp
);
2260 return set_interface(info
,(int)arg
);
2261 case MGSL_IOCTXENABLE
:
2262 return set_txenable(info
,(int)arg
, tty
);
2263 case MGSL_IOCRXENABLE
:
2264 return set_rxenable(info
,(int)arg
);
2265 case MGSL_IOCTXABORT
:
2266 return tx_abort(info
);
2267 case MGSL_IOCGSTATS
:
2268 return get_stats(info
, argp
);
2269 case MGSL_IOCWAITEVENT
:
2270 return wait_events(info
, argp
);
2272 return modem_input_wait(info
,(int)arg
);
2274 return -ENOIOCTLCMD
;
2279 /* Set new termios settings
2283 * tty pointer to tty structure
2284 * termios pointer to buffer to hold returned old termios
2286 static void mgslpc_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2288 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2289 unsigned long flags
;
2291 if (debug_level
>= DEBUG_LEVEL_INFO
)
2292 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2293 tty
->driver
->name
);
2295 /* just return if nothing has changed */
2296 if ((tty
->termios
.c_cflag
== old_termios
->c_cflag
)
2297 && (RELEVANT_IFLAG(tty
->termios
.c_iflag
)
2298 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2301 mgslpc_change_params(info
, tty
);
2303 /* Handle transition to B0 status */
2304 if (old_termios
->c_cflag
& CBAUD
&&
2305 !(tty
->termios
.c_cflag
& CBAUD
)) {
2306 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2307 spin_lock_irqsave(&info
->lock
,flags
);
2309 spin_unlock_irqrestore(&info
->lock
,flags
);
2312 /* Handle transition away from B0 status */
2313 if (!(old_termios
->c_cflag
& CBAUD
) &&
2314 tty
->termios
.c_cflag
& CBAUD
) {
2315 info
->serial_signals
|= SerialSignal_DTR
;
2316 if (!(tty
->termios
.c_cflag
& CRTSCTS
) ||
2317 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2318 info
->serial_signals
|= SerialSignal_RTS
;
2320 spin_lock_irqsave(&info
->lock
,flags
);
2322 spin_unlock_irqrestore(&info
->lock
,flags
);
2325 /* Handle turning off CRTSCTS */
2326 if (old_termios
->c_cflag
& CRTSCTS
&&
2327 !(tty
->termios
.c_cflag
& CRTSCTS
)) {
2328 tty
->hw_stopped
= 0;
2333 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2335 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2336 struct tty_port
*port
= &info
->port
;
2338 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2341 if (debug_level
>= DEBUG_LEVEL_INFO
)
2342 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2343 __FILE__
,__LINE__
, info
->device_name
, port
->count
);
2345 WARN_ON(!port
->count
);
2347 if (tty_port_close_start(port
, tty
, filp
) == 0)
2350 if (port
->flags
& ASYNC_INITIALIZED
)
2351 mgslpc_wait_until_sent(tty
, info
->timeout
);
2353 mgslpc_flush_buffer(tty
);
2355 tty_ldisc_flush(tty
);
2356 shutdown(info
, tty
);
2358 tty_port_close_end(port
, tty
);
2359 tty_port_tty_set(port
, NULL
);
2361 if (debug_level
>= DEBUG_LEVEL_INFO
)
2362 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2363 tty
->driver
->name
, port
->count
);
2366 /* Wait until the transmitter is empty.
2368 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2370 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2371 unsigned long orig_jiffies
, char_time
;
2376 if (debug_level
>= DEBUG_LEVEL_INFO
)
2377 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2378 __FILE__
,__LINE__
, info
->device_name
);
2380 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2383 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
2386 orig_jiffies
= jiffies
;
2388 /* Set check interval to 1/5 of estimated time to
2389 * send a character, and make it at least 1. The check
2390 * interval should also be less than the timeout.
2391 * Note: use tight timings here to satisfy the NIST-PCTS.
2394 if ( info
->params
.data_rate
) {
2395 char_time
= info
->timeout
/(32 * 5);
2402 char_time
= min_t(unsigned long, char_time
, timeout
);
2404 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2405 while (info
->tx_active
) {
2406 msleep_interruptible(jiffies_to_msecs(char_time
));
2407 if (signal_pending(current
))
2409 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2413 while ((info
->tx_count
|| info
->tx_active
) &&
2415 msleep_interruptible(jiffies_to_msecs(char_time
));
2416 if (signal_pending(current
))
2418 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2424 if (debug_level
>= DEBUG_LEVEL_INFO
)
2425 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2426 __FILE__
,__LINE__
, info
->device_name
);
2429 /* Called by tty_hangup() when a hangup is signaled.
2430 * This is the same as closing all open files for the port.
2432 static void mgslpc_hangup(struct tty_struct
*tty
)
2434 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2436 if (debug_level
>= DEBUG_LEVEL_INFO
)
2437 printk("%s(%d):mgslpc_hangup(%s)\n",
2438 __FILE__
,__LINE__
, info
->device_name
);
2440 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2443 mgslpc_flush_buffer(tty
);
2444 shutdown(info
, tty
);
2445 tty_port_hangup(&info
->port
);
2448 static int carrier_raised(struct tty_port
*port
)
2450 MGSLPC_INFO
*info
= container_of(port
, MGSLPC_INFO
, port
);
2451 unsigned long flags
;
2453 spin_lock_irqsave(&info
->lock
,flags
);
2455 spin_unlock_irqrestore(&info
->lock
,flags
);
2457 if (info
->serial_signals
& SerialSignal_DCD
)
2462 static void dtr_rts(struct tty_port
*port
, int onoff
)
2464 MGSLPC_INFO
*info
= container_of(port
, MGSLPC_INFO
, port
);
2465 unsigned long flags
;
2467 spin_lock_irqsave(&info
->lock
,flags
);
2469 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2471 info
->serial_signals
&= ~SerialSignal_RTS
+ SerialSignal_DTR
;
2473 spin_unlock_irqrestore(&info
->lock
,flags
);
2477 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2480 struct tty_port
*port
;
2482 unsigned long flags
;
2484 /* verify range of specified line number */
2486 if (line
>= mgslpc_device_count
) {
2487 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2488 __FILE__
,__LINE__
,line
);
2492 /* find the info structure for the specified line */
2493 info
= mgslpc_device_list
;
2494 while(info
&& info
->line
!= line
)
2495 info
= info
->next_device
;
2496 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2500 tty
->driver_data
= info
;
2501 tty_port_tty_set(port
, tty
);
2503 if (debug_level
>= DEBUG_LEVEL_INFO
)
2504 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2505 __FILE__
,__LINE__
,tty
->driver
->name
, port
->count
);
2507 /* If port is closing, signal caller to try again */
2508 if (tty_hung_up_p(filp
) || port
->flags
& ASYNC_CLOSING
){
2509 if (port
->flags
& ASYNC_CLOSING
)
2510 interruptible_sleep_on(&port
->close_wait
);
2511 retval
= ((port
->flags
& ASYNC_HUP_NOTIFY
) ?
2512 -EAGAIN
: -ERESTARTSYS
);
2516 tty
->low_latency
= (port
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2518 spin_lock_irqsave(&info
->netlock
, flags
);
2519 if (info
->netcount
) {
2521 spin_unlock_irqrestore(&info
->netlock
, flags
);
2524 spin_lock(&port
->lock
);
2526 spin_unlock(&port
->lock
);
2527 spin_unlock_irqrestore(&info
->netlock
, flags
);
2529 if (port
->count
== 1) {
2530 /* 1st open on this device, init hardware */
2531 retval
= startup(info
, tty
);
2536 retval
= tty_port_block_til_ready(&info
->port
, tty
, filp
);
2538 if (debug_level
>= DEBUG_LEVEL_INFO
)
2539 printk("%s(%d):block_til_ready(%s) returned %d\n",
2540 __FILE__
,__LINE__
, info
->device_name
, retval
);
2544 if (debug_level
>= DEBUG_LEVEL_INFO
)
2545 printk("%s(%d):mgslpc_open(%s) success\n",
2546 __FILE__
,__LINE__
, info
->device_name
);
2554 * /proc fs routines....
2557 static inline void line_info(struct seq_file
*m
, MGSLPC_INFO
*info
)
2560 unsigned long flags
;
2562 seq_printf(m
, "%s:io:%04X irq:%d",
2563 info
->device_name
, info
->io_base
, info
->irq_level
);
2565 /* output current serial signal states */
2566 spin_lock_irqsave(&info
->lock
,flags
);
2568 spin_unlock_irqrestore(&info
->lock
,flags
);
2572 if (info
->serial_signals
& SerialSignal_RTS
)
2573 strcat(stat_buf
, "|RTS");
2574 if (info
->serial_signals
& SerialSignal_CTS
)
2575 strcat(stat_buf
, "|CTS");
2576 if (info
->serial_signals
& SerialSignal_DTR
)
2577 strcat(stat_buf
, "|DTR");
2578 if (info
->serial_signals
& SerialSignal_DSR
)
2579 strcat(stat_buf
, "|DSR");
2580 if (info
->serial_signals
& SerialSignal_DCD
)
2581 strcat(stat_buf
, "|CD");
2582 if (info
->serial_signals
& SerialSignal_RI
)
2583 strcat(stat_buf
, "|RI");
2585 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2586 seq_printf(m
, " HDLC txok:%d rxok:%d",
2587 info
->icount
.txok
, info
->icount
.rxok
);
2588 if (info
->icount
.txunder
)
2589 seq_printf(m
, " txunder:%d", info
->icount
.txunder
);
2590 if (info
->icount
.txabort
)
2591 seq_printf(m
, " txabort:%d", info
->icount
.txabort
);
2592 if (info
->icount
.rxshort
)
2593 seq_printf(m
, " rxshort:%d", info
->icount
.rxshort
);
2594 if (info
->icount
.rxlong
)
2595 seq_printf(m
, " rxlong:%d", info
->icount
.rxlong
);
2596 if (info
->icount
.rxover
)
2597 seq_printf(m
, " rxover:%d", info
->icount
.rxover
);
2598 if (info
->icount
.rxcrc
)
2599 seq_printf(m
, " rxcrc:%d", info
->icount
.rxcrc
);
2601 seq_printf(m
, " ASYNC tx:%d rx:%d",
2602 info
->icount
.tx
, info
->icount
.rx
);
2603 if (info
->icount
.frame
)
2604 seq_printf(m
, " fe:%d", info
->icount
.frame
);
2605 if (info
->icount
.parity
)
2606 seq_printf(m
, " pe:%d", info
->icount
.parity
);
2607 if (info
->icount
.brk
)
2608 seq_printf(m
, " brk:%d", info
->icount
.brk
);
2609 if (info
->icount
.overrun
)
2610 seq_printf(m
, " oe:%d", info
->icount
.overrun
);
2613 /* Append serial signal status to end */
2614 seq_printf(m
, " %s\n", stat_buf
+1);
2616 seq_printf(m
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2617 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2621 /* Called to print information about devices
2623 static int mgslpc_proc_show(struct seq_file
*m
, void *v
)
2627 seq_printf(m
, "synclink driver:%s\n", driver_version
);
2629 info
= mgslpc_device_list
;
2632 info
= info
->next_device
;
2637 static int mgslpc_proc_open(struct inode
*inode
, struct file
*file
)
2639 return single_open(file
, mgslpc_proc_show
, NULL
);
2642 static const struct file_operations mgslpc_proc_fops
= {
2643 .owner
= THIS_MODULE
,
2644 .open
= mgslpc_proc_open
,
2646 .llseek
= seq_lseek
,
2647 .release
= single_release
,
2650 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2652 /* each buffer has header and data */
2653 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2655 /* calculate total allocation size for 8 buffers */
2656 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2658 /* limit total allocated memory */
2659 if (info
->rx_buf_total_size
> 0x10000)
2660 info
->rx_buf_total_size
= 0x10000;
2662 /* calculate number of buffers */
2663 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2665 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2666 if (info
->rx_buf
== NULL
)
2669 rx_reset_buffers(info
);
2673 static void rx_free_buffers(MGSLPC_INFO
*info
)
2675 kfree(info
->rx_buf
);
2676 info
->rx_buf
= NULL
;
2679 static int claim_resources(MGSLPC_INFO
*info
)
2681 if (rx_alloc_buffers(info
) < 0 ) {
2682 printk( "Can't allocate rx buffer %s\n", info
->device_name
);
2683 release_resources(info
);
2689 static void release_resources(MGSLPC_INFO
*info
)
2691 if (debug_level
>= DEBUG_LEVEL_INFO
)
2692 printk("release_resources(%s)\n", info
->device_name
);
2693 rx_free_buffers(info
);
2696 /* Add the specified device instance data structure to the
2697 * global linked list of devices and increment the device count.
2699 * Arguments: info pointer to device instance data
2701 static void mgslpc_add_device(MGSLPC_INFO
*info
)
2703 info
->next_device
= NULL
;
2704 info
->line
= mgslpc_device_count
;
2705 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2707 if (info
->line
< MAX_DEVICE_COUNT
) {
2708 if (maxframe
[info
->line
])
2709 info
->max_frame_size
= maxframe
[info
->line
];
2712 mgslpc_device_count
++;
2714 if (!mgslpc_device_list
)
2715 mgslpc_device_list
= info
;
2717 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
2718 while( current_dev
->next_device
)
2719 current_dev
= current_dev
->next_device
;
2720 current_dev
->next_device
= info
;
2723 if (info
->max_frame_size
< 4096)
2724 info
->max_frame_size
= 4096;
2725 else if (info
->max_frame_size
> 65535)
2726 info
->max_frame_size
= 65535;
2728 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2729 info
->device_name
, info
->io_base
, info
->irq_level
);
2731 #if SYNCLINK_GENERIC_HDLC
2734 tty_port_register_device(&info
->port
, serial_driver
, info
->line
,
2738 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2740 MGSLPC_INFO
*info
= mgslpc_device_list
;
2741 MGSLPC_INFO
*last
= NULL
;
2744 if (info
== remove_info
) {
2746 last
->next_device
= info
->next_device
;
2748 mgslpc_device_list
= info
->next_device
;
2749 tty_unregister_device(serial_driver
, info
->line
);
2750 #if SYNCLINK_GENERIC_HDLC
2753 release_resources(info
);
2755 mgslpc_device_count
--;
2759 info
= info
->next_device
;
2763 static const struct pcmcia_device_id mgslpc_ids
[] = {
2764 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2767 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2769 static struct pcmcia_driver mgslpc_driver
= {
2770 .owner
= THIS_MODULE
,
2771 .name
= "synclink_cs",
2772 .probe
= mgslpc_probe
,
2773 .remove
= mgslpc_detach
,
2774 .id_table
= mgslpc_ids
,
2775 .suspend
= mgslpc_suspend
,
2776 .resume
= mgslpc_resume
,
2779 static const struct tty_operations mgslpc_ops
= {
2780 .open
= mgslpc_open
,
2781 .close
= mgslpc_close
,
2782 .write
= mgslpc_write
,
2783 .put_char
= mgslpc_put_char
,
2784 .flush_chars
= mgslpc_flush_chars
,
2785 .write_room
= mgslpc_write_room
,
2786 .chars_in_buffer
= mgslpc_chars_in_buffer
,
2787 .flush_buffer
= mgslpc_flush_buffer
,
2788 .ioctl
= mgslpc_ioctl
,
2789 .throttle
= mgslpc_throttle
,
2790 .unthrottle
= mgslpc_unthrottle
,
2791 .send_xchar
= mgslpc_send_xchar
,
2792 .break_ctl
= mgslpc_break
,
2793 .wait_until_sent
= mgslpc_wait_until_sent
,
2794 .set_termios
= mgslpc_set_termios
,
2796 .start
= tx_release
,
2797 .hangup
= mgslpc_hangup
,
2798 .tiocmget
= tiocmget
,
2799 .tiocmset
= tiocmset
,
2800 .get_icount
= mgslpc_get_icount
,
2801 .proc_fops
= &mgslpc_proc_fops
,
2804 static int __init
synclink_cs_init(void)
2808 if (break_on_load
) {
2809 mgslpc_get_text_ptr();
2813 serial_driver
= tty_alloc_driver(MAX_DEVICE_COUNT
,
2814 TTY_DRIVER_REAL_RAW
|
2815 TTY_DRIVER_DYNAMIC_DEV
);
2816 if (!serial_driver
) {
2821 /* Initialize the tty_driver structure */
2823 serial_driver
->driver_name
= "synclink_cs";
2824 serial_driver
->name
= "ttySLP";
2825 serial_driver
->major
= ttymajor
;
2826 serial_driver
->minor_start
= 64;
2827 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2828 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
2829 serial_driver
->init_termios
= tty_std_termios
;
2830 serial_driver
->init_termios
.c_cflag
=
2831 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
2832 tty_set_operations(serial_driver
, &mgslpc_ops
);
2834 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
2835 printk("%s(%d):Couldn't register serial driver\n",
2840 rc
= pcmcia_register_driver(&mgslpc_driver
);
2844 printk("%s %s, tty major#%d\n",
2845 driver_name
, driver_version
,
2846 serial_driver
->major
);
2850 tty_unregister_driver(serial_driver
);
2852 put_tty_driver(serial_driver
);
2857 static void __exit
synclink_cs_exit(void)
2859 pcmcia_unregister_driver(&mgslpc_driver
);
2860 tty_unregister_driver(serial_driver
);
2861 put_tty_driver(serial_driver
);
2864 module_init(synclink_cs_init
);
2865 module_exit(synclink_cs_exit
);
2867 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
2872 /* note:standard BRG mode is broken in V3.2 chip
2873 * so enhanced mode is always used
2881 for (M
= 1; N
> 64 && M
< 16; M
++)
2887 * BGR[7..0] contained in BGR register
2888 * BGR[9..8] contained in CCR2[7..6]
2889 * divisor = (N+1)*2^M
2891 * Note: M *must* not be zero (causes asymetric duty cycle)
2893 write_reg(info
, (unsigned char) (channel
+ BGR
),
2894 (unsigned char) ((M
<< 6) + N
));
2895 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
2896 val
|= ((M
<< 4) & 0xc0);
2897 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
2901 /* Enabled the AUX clock output at the specified frequency.
2903 static void enable_auxclk(MGSLPC_INFO
*info
)
2909 * 07..06 MDS[1..0] 10 = transparent HDLC mode
2910 * 05 ADM Address Mode, 0 = no addr recognition
2911 * 04 TMD Timer Mode, 0 = external
2912 * 03 RAC Receiver Active, 0 = inactive
2913 * 02 RTS 0=RTS active during xmit, 1=RTS always active
2914 * 01 TRS Timer Resolution, 1=512
2915 * 00 TLP Test Loop, 0 = no loop
2921 /* channel B RTS is used to enable AUXCLK driver on SP505 */
2922 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
2924 write_reg(info
, CHB
+ MODE
, val
);
2928 * 07 PU Power Up, 1=active, 0=power down
2929 * 06 MCE Master Clock Enable, 1=enabled
2931 * 04..02 SC[2..0] Encoding
2932 * 01..00 SM[1..0] Serial Mode, 00=HDLC
2936 write_reg(info
, CHB
+ CCR0
, 0xc0);
2940 * 07 SFLG Shared Flag, 0 = disable shared flags
2941 * 06 GALP Go Active On Loop, 0 = not used
2942 * 05 GLP Go On Loop, 0 = not used
2943 * 04 ODS Output Driver Select, 1=TxD is push-pull output
2944 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
2945 * 02..00 CM[2..0] Clock Mode
2949 write_reg(info
, CHB
+ CCR1
, 0x17);
2953 * 07..06 BGR[9..8] Baud rate bits 9..8
2954 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
2955 * 04 SSEL Clock source select, 1=submode b
2956 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
2957 * 02 RWX Read/Write Exchange 0=disabled
2958 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
2959 * 00 DIV, data inversion 0=disabled, 1=enabled
2963 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
2964 write_reg(info
, CHB
+ CCR2
, 0x38);
2966 write_reg(info
, CHB
+ CCR2
, 0x30);
2970 * 07 MCK4 Master Clock Divide by 4, 1=enabled
2971 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
2972 * 05 TST1 Test Pin, 0=normal operation
2973 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
2974 * 03..02 Reserved, must be 0
2975 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
2979 write_reg(info
, CHB
+ CCR4
, 0x50);
2981 /* if auxclk not enabled, set internal BRG so
2982 * CTS transitions can be detected (requires TxC)
2984 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
2985 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
2987 mgslpc_set_rate(info
, CHB
, 921600);
2990 static void loopback_enable(MGSLPC_INFO
*info
)
2994 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
2995 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
2996 write_reg(info
, CHA
+ CCR1
, val
);
2998 /* CCR2:04 SSEL Clock source select, 1=submode b */
2999 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3000 write_reg(info
, CHA
+ CCR2
, val
);
3002 /* set LinkSpeed if available, otherwise default to 2Mbps */
3003 if (info
->params
.clock_speed
)
3004 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3006 mgslpc_set_rate(info
, CHA
, 1843200);
3008 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3009 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3010 write_reg(info
, CHA
+ MODE
, val
);
3013 static void hdlc_mode(MGSLPC_INFO
*info
)
3016 unsigned char clkmode
, clksubmode
;
3018 /* disable all interrupts */
3019 irq_disable(info
, CHA
, 0xffff);
3020 irq_disable(info
, CHB
, 0xffff);
3021 port_irq_disable(info
, 0xff);
3023 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3024 clkmode
= clksubmode
= 0;
3025 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3026 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3027 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3029 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3030 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3031 /* clock mode 7b, rcv = BRG, xmt = BRG */
3034 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3035 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3036 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3040 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3043 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3044 /* clock mode 0b, rcv = RxC, xmt = BRG */
3050 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3051 * 05 ADM Address Mode, 0 = no addr recognition
3052 * 04 TMD Timer Mode, 0 = external
3053 * 03 RAC Receiver Active, 0 = inactive
3054 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3055 * 01 TRS Timer Resolution, 1=512
3056 * 00 TLP Test Loop, 0 = no loop
3061 if (info
->params
.loopback
)
3064 /* preserve RTS state */
3065 if (info
->serial_signals
& SerialSignal_RTS
)
3067 write_reg(info
, CHA
+ MODE
, val
);
3071 * 07 PU Power Up, 1=active, 0=power down
3072 * 06 MCE Master Clock Enable, 1=enabled
3074 * 04..02 SC[2..0] Encoding
3075 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3080 switch (info
->params
.encoding
)
3082 case HDLC_ENCODING_NRZI
:
3085 case HDLC_ENCODING_BIPHASE_SPACE
:
3088 case HDLC_ENCODING_BIPHASE_MARK
:
3091 case HDLC_ENCODING_BIPHASE_LEVEL
:
3093 break; // Manchester
3095 write_reg(info
, CHA
+ CCR0
, val
);
3099 * 07 SFLG Shared Flag, 0 = disable shared flags
3100 * 06 GALP Go Active On Loop, 0 = not used
3101 * 05 GLP Go On Loop, 0 = not used
3102 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3103 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3104 * 02..00 CM[2..0] Clock Mode
3108 val
= 0x10 + clkmode
;
3109 write_reg(info
, CHA
+ CCR1
, val
);
3113 * 07..06 BGR[9..8] Baud rate bits 9..8
3114 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3115 * 04 SSEL Clock source select, 1=submode b
3116 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3117 * 02 RWX Read/Write Exchange 0=disabled
3118 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3119 * 00 DIV, data inversion 0=disabled, 1=enabled
3124 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3125 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3129 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3131 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3133 write_reg(info
, CHA
+ CCR2
, val
);
3137 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3138 * 05 EPT Enable preamble transmission, 1=enabled
3139 * 04 RADD Receive address pushed to FIFO, 0=disabled
3140 * 03 CRL CRC Reset Level, 0=FFFF
3141 * 02 RCRC Rx CRC 0=On 1=Off
3142 * 01 TCRC Tx CRC 0=On 1=Off
3143 * 00 PSD DPLL Phase Shift Disable
3148 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3150 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3152 switch (info
->params
.preamble_length
)
3154 case HDLC_PREAMBLE_LENGTH_16BITS
:
3157 case HDLC_PREAMBLE_LENGTH_32BITS
:
3160 case HDLC_PREAMBLE_LENGTH_64BITS
:
3164 write_reg(info
, CHA
+ CCR3
, val
);
3166 /* PRE - Preamble pattern */
3168 switch (info
->params
.preamble
)
3170 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3171 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3172 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3173 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3175 write_reg(info
, CHA
+ PRE
, val
);
3179 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3180 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3181 * 05 TST1 Test Pin, 0=normal operation
3182 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3183 * 03..02 Reserved, must be 0
3184 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3189 write_reg(info
, CHA
+ CCR4
, val
);
3190 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3191 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3193 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3195 /* RLCR Receive length check register
3197 * 7 1=enable receive length check
3198 * 6..0 Max frame length = (RL + 1) * 32
3200 write_reg(info
, CHA
+ RLCR
, 0);
3202 /* XBCH Transmit Byte Count High
3204 * 07 DMA mode, 0 = interrupt driven
3205 * 06 NRM, 0=ABM (ignored)
3206 * 05 CAS Carrier Auto Start
3207 * 04 XC Transmit Continuously (ignored)
3208 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3213 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3215 write_reg(info
, CHA
+ XBCH
, val
);
3216 enable_auxclk(info
);
3217 if (info
->params
.loopback
|| info
->testing_irq
)
3218 loopback_enable(info
);
3219 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3221 irq_enable(info
, CHB
, IRQ_CTS
);
3222 /* PVR[3] 1=AUTO CTS active */
3223 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3225 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3227 irq_enable(info
, CHA
,
3228 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3229 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3230 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3231 wait_command_complete(info
, CHA
);
3232 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3234 /* Master clock mode enabled above to allow reset commands
3235 * to complete even if no data clocks are present.
3237 * Disable master clock mode for normal communications because
3238 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3239 * IRQ when in master clock mode.
3241 * Leave master clock mode enabled for IRQ test because the
3242 * timer IRQ used by the test can only happen in master clock mode.
3244 if (!info
->testing_irq
)
3245 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3253 static void rx_stop(MGSLPC_INFO
*info
)
3255 if (debug_level
>= DEBUG_LEVEL_ISR
)
3256 printk("%s(%d):rx_stop(%s)\n",
3257 __FILE__
,__LINE__
, info
->device_name
);
3259 /* MODE:03 RAC Receiver Active, 0=inactive */
3260 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3262 info
->rx_enabled
= false;
3263 info
->rx_overflow
= false;
3266 static void rx_start(MGSLPC_INFO
*info
)
3268 if (debug_level
>= DEBUG_LEVEL_ISR
)
3269 printk("%s(%d):rx_start(%s)\n",
3270 __FILE__
,__LINE__
, info
->device_name
);
3272 rx_reset_buffers(info
);
3273 info
->rx_enabled
= false;
3274 info
->rx_overflow
= false;
3276 /* MODE:03 RAC Receiver Active, 1=active */
3277 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3279 info
->rx_enabled
= true;
3282 static void tx_start(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
3284 if (debug_level
>= DEBUG_LEVEL_ISR
)
3285 printk("%s(%d):tx_start(%s)\n",
3286 __FILE__
,__LINE__
, info
->device_name
);
3288 if (info
->tx_count
) {
3289 /* If auto RTS enabled and RTS is inactive, then assert */
3290 /* RTS and set a flag indicating that the driver should */
3291 /* negate RTS when the transmission completes. */
3292 info
->drop_rts_on_tx_done
= false;
3294 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3296 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3297 info
->serial_signals
|= SerialSignal_RTS
;
3299 info
->drop_rts_on_tx_done
= true;
3303 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3304 if (!info
->tx_active
) {
3305 info
->tx_active
= true;
3306 tx_ready(info
, tty
);
3309 info
->tx_active
= true;
3310 tx_ready(info
, tty
);
3311 mod_timer(&info
->tx_timer
, jiffies
+
3312 msecs_to_jiffies(5000));
3316 if (!info
->tx_enabled
)
3317 info
->tx_enabled
= true;
3320 static void tx_stop(MGSLPC_INFO
*info
)
3322 if (debug_level
>= DEBUG_LEVEL_ISR
)
3323 printk("%s(%d):tx_stop(%s)\n",
3324 __FILE__
,__LINE__
, info
->device_name
);
3326 del_timer(&info
->tx_timer
);
3328 info
->tx_enabled
= false;
3329 info
->tx_active
= false;
3332 /* Reset the adapter to a known state and prepare it for further use.
3334 static void reset_device(MGSLPC_INFO
*info
)
3336 /* power up both channels (set BIT7) */
3337 write_reg(info
, CHA
+ CCR0
, 0x80);
3338 write_reg(info
, CHB
+ CCR0
, 0x80);
3339 write_reg(info
, CHA
+ MODE
, 0);
3340 write_reg(info
, CHB
+ MODE
, 0);
3342 /* disable all interrupts */
3343 irq_disable(info
, CHA
, 0xffff);
3344 irq_disable(info
, CHB
, 0xffff);
3345 port_irq_disable(info
, 0xff);
3347 /* PCR Port Configuration Register
3349 * 07..04 DEC[3..0] Serial I/F select outputs
3350 * 03 output, 1=AUTO CTS control enabled
3351 * 02 RI Ring Indicator input 0=active
3352 * 01 DSR input 0=active
3353 * 00 DTR output 0=active
3357 write_reg(info
, PCR
, 0x06);
3359 /* PVR Port Value Register
3361 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3362 * 03 AUTO CTS output 1=enabled
3363 * 02 RI Ring Indicator input
3365 * 00 DTR output (1=inactive)
3369 // write_reg(info, PVR, PVR_DTR);
3371 /* IPC Interrupt Port Configuration
3373 * 07 VIS 1=Masked interrupts visible
3374 * 06..05 Reserved, 0
3375 * 04..03 SLA Slave address, 00 ignored
3376 * 02 CASM Cascading Mode, 1=daisy chain
3377 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3381 write_reg(info
, IPC
, 0x05);
3384 static void async_mode(MGSLPC_INFO
*info
)
3388 /* disable all interrupts */
3389 irq_disable(info
, CHA
, 0xffff);
3390 irq_disable(info
, CHB
, 0xffff);
3391 port_irq_disable(info
, 0xff);
3396 * 06 FRTS RTS State, 0=active
3397 * 05 FCTS Flow Control on CTS
3398 * 04 FLON Flow Control Enable
3399 * 03 RAC Receiver Active, 0 = inactive
3400 * 02 RTS 0=Auto RTS, 1=manual RTS
3401 * 01 TRS Timer Resolution, 1=512
3402 * 00 TLP Test Loop, 0 = no loop
3407 if (info
->params
.loopback
)
3410 /* preserve RTS state */
3411 if (!(info
->serial_signals
& SerialSignal_RTS
))
3413 write_reg(info
, CHA
+ MODE
, val
);
3417 * 07 PU Power Up, 1=active, 0=power down
3418 * 06 MCE Master Clock Enable, 1=enabled
3420 * 04..02 SC[2..0] Encoding, 000=NRZ
3421 * 01..00 SM[1..0] Serial Mode, 11=Async
3425 write_reg(info
, CHA
+ CCR0
, 0x83);
3429 * 07..05 Reserved, 0
3430 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3431 * 03 BCR Bit Clock Rate, 1=16x
3432 * 02..00 CM[2..0] Clock Mode, 111=BRG
3436 write_reg(info
, CHA
+ CCR1
, 0x1f);
3440 * 07..06 BGR[9..8] Baud rate bits 9..8
3441 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3442 * 04 SSEL Clock source select, 1=submode b
3443 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3444 * 02 RWX Read/Write Exchange 0=disabled
3446 * 00 DIV, data inversion 0=disabled, 1=enabled
3450 write_reg(info
, CHA
+ CCR2
, 0x10);
3454 * 07..01 Reserved, 0
3455 * 00 PSD DPLL Phase Shift Disable
3459 write_reg(info
, CHA
+ CCR3
, 0);
3463 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3464 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3465 * 05 TST1 Test Pin, 0=normal operation
3466 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3467 * 03..00 Reserved, must be 0
3471 write_reg(info
, CHA
+ CCR4
, 0x50);
3472 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3477 * 06 XBRK transmit break, 0=normal operation
3478 * 05 Stop bits (0=1, 1=2)
3479 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3480 * 02 PAREN Parity Enable
3481 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3485 if (info
->params
.data_bits
!= 8)
3486 val
|= BIT0
; /* 7 bits */
3487 if (info
->params
.stop_bits
!= 1)
3489 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3491 val
|= BIT2
; /* Parity enable */
3492 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3497 write_reg(info
, CHA
+ DAFO
, val
);
3499 /* RFC Rx FIFO Control
3502 * 06 DPS, 1=parity bit not stored in data byte
3503 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3504 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3505 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3507 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3511 write_reg(info
, CHA
+ RFC
, 0x5c);
3513 /* RLCR Receive length check register
3515 * Max frame length = (RL + 1) * 32
3517 write_reg(info
, CHA
+ RLCR
, 0);
3519 /* XBCH Transmit Byte Count High
3521 * 07 DMA mode, 0 = interrupt driven
3522 * 06 NRM, 0=ABM (ignored)
3523 * 05 CAS Carrier Auto Start
3524 * 04 XC Transmit Continuously (ignored)
3525 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3530 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3532 write_reg(info
, CHA
+ XBCH
, val
);
3533 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3534 irq_enable(info
, CHA
, IRQ_CTS
);
3536 /* MODE:03 RAC Receiver Active, 1=active */
3537 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3538 enable_auxclk(info
);
3539 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3540 irq_enable(info
, CHB
, IRQ_CTS
);
3541 /* PVR[3] 1=AUTO CTS active */
3542 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3544 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3545 irq_enable(info
, CHA
,
3546 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3547 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3548 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3549 wait_command_complete(info
, CHA
);
3550 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3553 /* Set the HDLC idle mode for the transmitter.
3555 static void tx_set_idle(MGSLPC_INFO
*info
)
3557 /* Note: ESCC2 only supports flags and one idle modes */
3558 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3559 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3561 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3564 /* get state of the V24 status (input) signals.
3566 static void get_signals(MGSLPC_INFO
*info
)
3568 unsigned char status
= 0;
3570 /* preserve DTR and RTS */
3571 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3573 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3574 info
->serial_signals
|= SerialSignal_DCD
;
3575 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3576 info
->serial_signals
|= SerialSignal_CTS
;
3578 status
= read_reg(info
, CHA
+ PVR
);
3579 if (!(status
& PVR_RI
))
3580 info
->serial_signals
|= SerialSignal_RI
;
3581 if (!(status
& PVR_DSR
))
3582 info
->serial_signals
|= SerialSignal_DSR
;
3585 /* Set the state of DTR and RTS based on contents of
3586 * serial_signals member of device extension.
3588 static void set_signals(MGSLPC_INFO
*info
)
3592 val
= read_reg(info
, CHA
+ MODE
);
3593 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3594 if (info
->serial_signals
& SerialSignal_RTS
)
3599 if (info
->serial_signals
& SerialSignal_RTS
)
3604 write_reg(info
, CHA
+ MODE
, val
);
3606 if (info
->serial_signals
& SerialSignal_DTR
)
3607 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3609 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3612 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3619 info
->rx_frame_count
= 0;
3620 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3621 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3622 buf
->status
= buf
->count
= 0;
3626 /* Attempt to return a received HDLC frame
3627 * Only frames received without errors are returned.
3629 * Returns true if frame returned, otherwise false
3631 static bool rx_get_frame(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
3633 unsigned short status
;
3635 unsigned int framesize
= 0;
3636 unsigned long flags
;
3637 bool return_frame
= false;
3639 if (info
->rx_frame_count
== 0)
3642 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3644 status
= buf
->status
;
3646 /* 07 VFR 1=valid frame
3647 * 06 RDO 1=data overrun
3648 * 05 CRC 1=OK, 0=error
3649 * 04 RAB 1=frame aborted
3651 if ((status
& 0xf0) != 0xA0) {
3652 if (!(status
& BIT7
) || (status
& BIT4
))
3653 info
->icount
.rxabort
++;
3654 else if (status
& BIT6
)
3655 info
->icount
.rxover
++;
3656 else if (!(status
& BIT5
)) {
3657 info
->icount
.rxcrc
++;
3658 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3659 return_frame
= true;
3662 #if SYNCLINK_GENERIC_HDLC
3664 info
->netdev
->stats
.rx_errors
++;
3665 info
->netdev
->stats
.rx_frame_errors
++;
3669 return_frame
= true;
3672 framesize
= buf
->count
;
3674 if (debug_level
>= DEBUG_LEVEL_BH
)
3675 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3676 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
3678 if (debug_level
>= DEBUG_LEVEL_DATA
)
3679 trace_block(info
, buf
->data
, framesize
, 0);
3682 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3683 framesize
+1 > info
->max_frame_size
) ||
3684 framesize
> info
->max_frame_size
)
3685 info
->icount
.rxlong
++;
3688 info
->icount
.rxok
++;
3690 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3691 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3695 #if SYNCLINK_GENERIC_HDLC
3697 hdlcdev_rx(info
, buf
->data
, framesize
);
3700 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3704 spin_lock_irqsave(&info
->lock
,flags
);
3705 buf
->status
= buf
->count
= 0;
3706 info
->rx_frame_count
--;
3708 if (info
->rx_get
>= info
->rx_buf_count
)
3710 spin_unlock_irqrestore(&info
->lock
,flags
);
3715 static bool register_test(MGSLPC_INFO
*info
)
3717 static unsigned char patterns
[] =
3718 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3719 static unsigned int count
= ARRAY_SIZE(patterns
);
3722 unsigned long flags
;
3724 spin_lock_irqsave(&info
->lock
,flags
);
3727 for (i
= 0; i
< count
; i
++) {
3728 write_reg(info
, XAD1
, patterns
[i
]);
3729 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3730 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3731 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3737 spin_unlock_irqrestore(&info
->lock
,flags
);
3741 static bool irq_test(MGSLPC_INFO
*info
)
3743 unsigned long end_time
;
3744 unsigned long flags
;
3746 spin_lock_irqsave(&info
->lock
,flags
);
3749 info
->testing_irq
= true;
3752 info
->irq_occurred
= false;
3754 /* init hdlc mode */
3756 irq_enable(info
, CHA
, IRQ_TIMER
);
3757 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
3758 issue_command(info
, CHA
, CMD_START_TIMER
);
3760 spin_unlock_irqrestore(&info
->lock
,flags
);
3763 while(end_time
-- && !info
->irq_occurred
) {
3764 msleep_interruptible(10);
3767 info
->testing_irq
= false;
3769 spin_lock_irqsave(&info
->lock
,flags
);
3771 spin_unlock_irqrestore(&info
->lock
,flags
);
3773 return info
->irq_occurred
;
3776 static int adapter_test(MGSLPC_INFO
*info
)
3778 if (!register_test(info
)) {
3779 info
->init_error
= DiagStatus_AddressFailure
;
3780 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
3781 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
3785 if (!irq_test(info
)) {
3786 info
->init_error
= DiagStatus_IrqFailure
;
3787 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
3788 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
3792 if (debug_level
>= DEBUG_LEVEL_INFO
)
3793 printk("%s(%d):device %s passed diagnostics\n",
3794 __FILE__
,__LINE__
,info
->device_name
);
3798 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
3803 printk("%s tx data:\n",info
->device_name
);
3805 printk("%s rx data:\n",info
->device_name
);
3813 for(i
=0;i
<linecount
;i
++)
3814 printk("%02X ",(unsigned char)data
[i
]);
3817 for(i
=0;i
<linecount
;i
++) {
3818 if (data
[i
]>=040 && data
[i
]<=0176)
3819 printk("%c",data
[i
]);
3830 /* HDLC frame time out
3831 * update stats and do tx completion processing
3833 static void tx_timeout(unsigned long context
)
3835 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
3836 unsigned long flags
;
3838 if ( debug_level
>= DEBUG_LEVEL_INFO
)
3839 printk( "%s(%d):tx_timeout(%s)\n",
3840 __FILE__
,__LINE__
,info
->device_name
);
3841 if(info
->tx_active
&&
3842 info
->params
.mode
== MGSL_MODE_HDLC
) {
3843 info
->icount
.txtimeout
++;
3845 spin_lock_irqsave(&info
->lock
,flags
);
3846 info
->tx_active
= false;
3847 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
3849 spin_unlock_irqrestore(&info
->lock
,flags
);
3851 #if SYNCLINK_GENERIC_HDLC
3853 hdlcdev_tx_done(info
);
3857 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
3858 bh_transmit(info
, tty
);
3863 #if SYNCLINK_GENERIC_HDLC
3866 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
3867 * set encoding and frame check sequence (FCS) options
3869 * dev pointer to network device structure
3870 * encoding serial encoding setting
3871 * parity FCS setting
3873 * returns 0 if success, otherwise error code
3875 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
3876 unsigned short parity
)
3878 MGSLPC_INFO
*info
= dev_to_port(dev
);
3879 struct tty_struct
*tty
;
3880 unsigned char new_encoding
;
3881 unsigned short new_crctype
;
3883 /* return error if TTY interface open */
3884 if (info
->port
.count
)
3889 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
3890 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
3891 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
3892 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
3893 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
3894 default: return -EINVAL
;
3899 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
3900 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
3901 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
3902 default: return -EINVAL
;
3905 info
->params
.encoding
= new_encoding
;
3906 info
->params
.crc_type
= new_crctype
;
3908 /* if network interface up, reprogram hardware */
3909 if (info
->netcount
) {
3910 tty
= tty_port_tty_get(&info
->port
);
3911 mgslpc_program_hw(info
, tty
);
3919 * called by generic HDLC layer to send frame
3921 * skb socket buffer containing HDLC frame
3922 * dev pointer to network device structure
3924 static netdev_tx_t
hdlcdev_xmit(struct sk_buff
*skb
,
3925 struct net_device
*dev
)
3927 MGSLPC_INFO
*info
= dev_to_port(dev
);
3928 unsigned long flags
;
3930 if (debug_level
>= DEBUG_LEVEL_INFO
)
3931 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
3933 /* stop sending until this frame completes */
3934 netif_stop_queue(dev
);
3936 /* copy data to device buffers */
3937 skb_copy_from_linear_data(skb
, info
->tx_buf
, skb
->len
);
3939 info
->tx_put
= info
->tx_count
= skb
->len
;
3941 /* update network statistics */
3942 dev
->stats
.tx_packets
++;
3943 dev
->stats
.tx_bytes
+= skb
->len
;
3945 /* done with socket buffer, so free it */
3948 /* save start time for transmit timeout detection */
3949 dev
->trans_start
= jiffies
;
3951 /* start hardware transmitter if necessary */
3952 spin_lock_irqsave(&info
->lock
,flags
);
3953 if (!info
->tx_active
) {
3954 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
3955 tx_start(info
, tty
);
3958 spin_unlock_irqrestore(&info
->lock
,flags
);
3960 return NETDEV_TX_OK
;
3964 * called by network layer when interface enabled
3965 * claim resources and initialize hardware
3967 * dev pointer to network device structure
3969 * returns 0 if success, otherwise error code
3971 static int hdlcdev_open(struct net_device
*dev
)
3973 MGSLPC_INFO
*info
= dev_to_port(dev
);
3974 struct tty_struct
*tty
;
3976 unsigned long flags
;
3978 if (debug_level
>= DEBUG_LEVEL_INFO
)
3979 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
3981 /* generic HDLC layer open processing */
3982 if ((rc
= hdlc_open(dev
)))
3985 /* arbitrate between network and tty opens */
3986 spin_lock_irqsave(&info
->netlock
, flags
);
3987 if (info
->port
.count
!= 0 || info
->netcount
!= 0) {
3988 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
3989 spin_unlock_irqrestore(&info
->netlock
, flags
);
3993 spin_unlock_irqrestore(&info
->netlock
, flags
);
3995 tty
= tty_port_tty_get(&info
->port
);
3996 /* claim resources and init adapter */
3997 if ((rc
= startup(info
, tty
)) != 0) {
3999 spin_lock_irqsave(&info
->netlock
, flags
);
4001 spin_unlock_irqrestore(&info
->netlock
, flags
);
4004 /* assert DTR and RTS, apply hardware settings */
4005 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4006 mgslpc_program_hw(info
, tty
);
4009 /* enable network layer transmit */
4010 dev
->trans_start
= jiffies
;
4011 netif_start_queue(dev
);
4013 /* inform generic HDLC layer of current DCD status */
4014 spin_lock_irqsave(&info
->lock
, flags
);
4016 spin_unlock_irqrestore(&info
->lock
, flags
);
4017 if (info
->serial_signals
& SerialSignal_DCD
)
4018 netif_carrier_on(dev
);
4020 netif_carrier_off(dev
);
4025 * called by network layer when interface is disabled
4026 * shutdown hardware and release resources
4028 * dev pointer to network device structure
4030 * returns 0 if success, otherwise error code
4032 static int hdlcdev_close(struct net_device
*dev
)
4034 MGSLPC_INFO
*info
= dev_to_port(dev
);
4035 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4036 unsigned long flags
;
4038 if (debug_level
>= DEBUG_LEVEL_INFO
)
4039 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4041 netif_stop_queue(dev
);
4043 /* shutdown adapter and release resources */
4044 shutdown(info
, tty
);
4048 spin_lock_irqsave(&info
->netlock
, flags
);
4050 spin_unlock_irqrestore(&info
->netlock
, flags
);
4056 * called by network layer to process IOCTL call to network device
4058 * dev pointer to network device structure
4059 * ifr pointer to network interface request structure
4060 * cmd IOCTL command code
4062 * returns 0 if success, otherwise error code
4064 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4066 const size_t size
= sizeof(sync_serial_settings
);
4067 sync_serial_settings new_line
;
4068 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4069 MGSLPC_INFO
*info
= dev_to_port(dev
);
4072 if (debug_level
>= DEBUG_LEVEL_INFO
)
4073 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4075 /* return error if TTY interface open */
4076 if (info
->port
.count
)
4079 if (cmd
!= SIOCWANDEV
)
4080 return hdlc_ioctl(dev
, ifr
, cmd
);
4082 memset(&new_line
, 0, size
);
4084 switch(ifr
->ifr_settings
.type
) {
4085 case IF_GET_IFACE
: /* return current sync_serial_settings */
4087 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4088 if (ifr
->ifr_settings
.size
< size
) {
4089 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4093 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4094 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4095 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4096 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4099 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4100 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4101 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4102 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4103 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4106 new_line
.clock_rate
= info
->params
.clock_speed
;
4107 new_line
.loopback
= info
->params
.loopback
? 1:0;
4109 if (copy_to_user(line
, &new_line
, size
))
4113 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4115 if(!capable(CAP_NET_ADMIN
))
4117 if (copy_from_user(&new_line
, line
, size
))
4120 switch (new_line
.clock_type
)
4122 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4123 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4124 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4125 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4126 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4127 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4128 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4129 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4130 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4131 default: return -EINVAL
;
4134 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4137 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4138 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4139 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4140 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4141 info
->params
.flags
|= flags
;
4143 info
->params
.loopback
= new_line
.loopback
;
4145 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4146 info
->params
.clock_speed
= new_line
.clock_rate
;
4148 info
->params
.clock_speed
= 0;
4150 /* if network interface up, reprogram hardware */
4151 if (info
->netcount
) {
4152 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4153 mgslpc_program_hw(info
, tty
);
4159 return hdlc_ioctl(dev
, ifr
, cmd
);
4164 * called by network layer when transmit timeout is detected
4166 * dev pointer to network device structure
4168 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4170 MGSLPC_INFO
*info
= dev_to_port(dev
);
4171 unsigned long flags
;
4173 if (debug_level
>= DEBUG_LEVEL_INFO
)
4174 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4176 dev
->stats
.tx_errors
++;
4177 dev
->stats
.tx_aborted_errors
++;
4179 spin_lock_irqsave(&info
->lock
,flags
);
4181 spin_unlock_irqrestore(&info
->lock
,flags
);
4183 netif_wake_queue(dev
);
4187 * called by device driver when transmit completes
4188 * reenable network layer transmit if stopped
4190 * info pointer to device instance information
4192 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4194 if (netif_queue_stopped(info
->netdev
))
4195 netif_wake_queue(info
->netdev
);
4199 * called by device driver when frame received
4200 * pass frame to network layer
4202 * info pointer to device instance information
4203 * buf pointer to buffer contianing frame data
4204 * size count of data bytes in buf
4206 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4208 struct sk_buff
*skb
= dev_alloc_skb(size
);
4209 struct net_device
*dev
= info
->netdev
;
4211 if (debug_level
>= DEBUG_LEVEL_INFO
)
4212 printk("hdlcdev_rx(%s)\n",dev
->name
);
4215 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4216 dev
->stats
.rx_dropped
++;
4220 memcpy(skb_put(skb
, size
), buf
, size
);
4222 skb
->protocol
= hdlc_type_trans(skb
, dev
);
4224 dev
->stats
.rx_packets
++;
4225 dev
->stats
.rx_bytes
+= size
;
4230 static const struct net_device_ops hdlcdev_ops
= {
4231 .ndo_open
= hdlcdev_open
,
4232 .ndo_stop
= hdlcdev_close
,
4233 .ndo_change_mtu
= hdlc_change_mtu
,
4234 .ndo_start_xmit
= hdlc_start_xmit
,
4235 .ndo_do_ioctl
= hdlcdev_ioctl
,
4236 .ndo_tx_timeout
= hdlcdev_tx_timeout
,
4240 * called by device driver when adding device instance
4241 * do generic HDLC initialization
4243 * info pointer to device instance information
4245 * returns 0 if success, otherwise error code
4247 static int hdlcdev_init(MGSLPC_INFO
*info
)
4250 struct net_device
*dev
;
4253 /* allocate and initialize network and HDLC layer objects */
4255 if (!(dev
= alloc_hdlcdev(info
))) {
4256 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4260 /* for network layer reporting purposes only */
4261 dev
->base_addr
= info
->io_base
;
4262 dev
->irq
= info
->irq_level
;
4264 /* network layer callbacks and settings */
4265 dev
->netdev_ops
= &hdlcdev_ops
;
4266 dev
->watchdog_timeo
= 10 * HZ
;
4267 dev
->tx_queue_len
= 50;
4269 /* generic HDLC layer callbacks and settings */
4270 hdlc
= dev_to_hdlc(dev
);
4271 hdlc
->attach
= hdlcdev_attach
;
4272 hdlc
->xmit
= hdlcdev_xmit
;
4274 /* register objects with HDLC layer */
4275 if ((rc
= register_hdlc_device(dev
))) {
4276 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4286 * called by device driver when removing device instance
4287 * do generic HDLC cleanup
4289 * info pointer to device instance information
4291 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4293 unregister_hdlc_device(info
->netdev
);
4294 free_netdev(info
->netdev
);
4295 info
->netdev
= NULL
;
4298 #endif /* CONFIG_HDLC */