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 <linux/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; */
107 unsigned char status
;
111 /* The queue of BH actions to be performed */
114 #define BH_TRANSMIT 2
117 #define IO_PIN_SHUTDOWN_LIMIT 100
119 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
121 struct _input_signal_events
{
134 * Device instance data structure
137 typedef struct _mgslpc_info
{
138 struct tty_port port
;
139 void *if_ptr
; /* General purpose pointer (used by SPPP) */
143 struct mgsl_icount icount
;
146 int x_char
; /* xon/xoff character */
147 unsigned char read_status_mask
;
148 unsigned char ignore_status_mask
;
150 unsigned char *tx_buf
;
155 /* circular list of fixed length rx buffers */
157 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
158 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
159 int rx_put
; /* index of next empty rx buffer */
160 int rx_get
; /* index of next full rx buffer */
161 int rx_buf_size
; /* size in bytes of single rx buffer */
162 int rx_buf_count
; /* total number of rx buffers */
163 int rx_frame_count
; /* number of full rx buffers */
165 wait_queue_head_t status_event_wait_q
;
166 wait_queue_head_t event_wait_q
;
167 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
168 struct _mgslpc_info
*next_device
; /* device list link */
170 unsigned short imra_value
;
171 unsigned short imrb_value
;
172 unsigned char pim_value
;
175 struct work_struct task
; /* task structure for scheduling bh */
184 int dcd_chkcount
; /* check counts to prevent */
185 int cts_chkcount
; /* too many IRQs if a signal */
186 int dsr_chkcount
; /* is floating */
197 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
199 char device_name
[25]; /* device instance name */
201 unsigned int io_base
; /* base I/O address of adapter */
202 unsigned int irq_level
;
204 MGSL_PARAMS params
; /* communications parameters */
206 unsigned char serial_signals
; /* current serial signal states */
208 bool irq_occurred
; /* for diagnostics use */
210 unsigned int init_error
; /* startup error (DIAGS) */
213 bool drop_rts_on_tx_done
;
215 struct _input_signal_events input_signal_events
;
218 struct pcmcia_device
*p_dev
;
221 /* SPPP/Cisco HDLC device parts */
225 #if SYNCLINK_GENERIC_HDLC
226 struct net_device
*netdev
;
231 #define MGSLPC_MAGIC 0x5402
234 * The size of the serial xmit buffer is 1 page, or 4096 bytes
236 #define TXBUFSIZE 4096
239 #define CHA 0x00 /* channel A offset */
240 #define CHB 0x40 /* channel B offset */
243 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
290 #define IRQ_BREAK_ON BIT15 // rx break detected
291 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
292 #define IRQ_ALLSENT BIT13 // all sent
293 #define IRQ_UNDERRUN BIT12 // transmit data underrun
294 #define IRQ_TIMER BIT11 // timer interrupt
295 #define IRQ_CTS BIT10 // CTS status change
296 #define IRQ_TXREPEAT BIT9 // tx message repeat
297 #define IRQ_TXFIFO BIT8 // transmit pool ready
298 #define IRQ_RXEOM BIT7 // receive message end
299 #define IRQ_EXITHUNT BIT6 // receive frame start
300 #define IRQ_RXTIME BIT6 // rx char timeout
301 #define IRQ_DCD BIT2 // carrier detect status change
302 #define IRQ_OVERRUN BIT1 // receive frame overflow
303 #define IRQ_RXFIFO BIT0 // receive pool full
307 #define XFW BIT6 // transmit FIFO write enable
308 #define CEC BIT2 // command executing
309 #define CTS BIT1 // CTS state
314 #define PVR_AUTOCTS BIT3
315 #define PVR_RS232 0x20 /* 0010b */
316 #define PVR_V35 0xe0 /* 1110b */
317 #define PVR_RS422 0x40 /* 0100b */
319 /* Register access functions */
321 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
322 #define read_reg(info, reg) inb((info)->io_base + (reg))
324 #define read_reg16(info, reg) inw((info)->io_base + (reg))
325 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
327 #define set_reg_bits(info, reg, mask) \
328 write_reg(info, (reg), \
329 (unsigned char) (read_reg(info, (reg)) | (mask)))
330 #define clear_reg_bits(info, reg, mask) \
331 write_reg(info, (reg), \
332 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
334 * interrupt enable/disable routines
336 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
338 if (channel
== CHA
) {
339 info
->imra_value
|= mask
;
340 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
342 info
->imrb_value
|= mask
;
343 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
346 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
348 if (channel
== CHA
) {
349 info
->imra_value
&= ~mask
;
350 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
352 info
->imrb_value
&= ~mask
;
353 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
357 #define port_irq_disable(info, mask) \
358 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
360 #define port_irq_enable(info, mask) \
361 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
363 static void rx_start(MGSLPC_INFO
*info
);
364 static void rx_stop(MGSLPC_INFO
*info
);
366 static void tx_start(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
367 static void tx_stop(MGSLPC_INFO
*info
);
368 static void tx_set_idle(MGSLPC_INFO
*info
);
370 static void get_signals(MGSLPC_INFO
*info
);
371 static void set_signals(MGSLPC_INFO
*info
);
373 static void reset_device(MGSLPC_INFO
*info
);
375 static void hdlc_mode(MGSLPC_INFO
*info
);
376 static void async_mode(MGSLPC_INFO
*info
);
378 static void tx_timeout(struct timer_list
*t
);
380 static int carrier_raised(struct tty_port
*port
);
381 static void dtr_rts(struct tty_port
*port
, int onoff
);
383 #if SYNCLINK_GENERIC_HDLC
384 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
385 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
386 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
387 static int hdlcdev_init(MGSLPC_INFO
*info
);
388 static void hdlcdev_exit(MGSLPC_INFO
*info
);
391 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
393 static bool register_test(MGSLPC_INFO
*info
);
394 static bool irq_test(MGSLPC_INFO
*info
);
395 static int adapter_test(MGSLPC_INFO
*info
);
397 static int claim_resources(MGSLPC_INFO
*info
);
398 static void release_resources(MGSLPC_INFO
*info
);
399 static int mgslpc_add_device(MGSLPC_INFO
*info
);
400 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
402 static bool rx_get_frame(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
403 static void rx_reset_buffers(MGSLPC_INFO
*info
);
404 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
405 static void rx_free_buffers(MGSLPC_INFO
*info
);
407 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
);
410 * Bottom half interrupt handlers
412 static void bh_handler(struct work_struct
*work
);
413 static void bh_transmit(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
414 static void bh_status(MGSLPC_INFO
*info
);
419 static int tiocmget(struct tty_struct
*tty
);
420 static int tiocmset(struct tty_struct
*tty
,
421 unsigned int set
, unsigned int clear
);
422 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
423 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
424 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
, struct tty_struct
*tty
);
425 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
426 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
427 static int set_txenable(MGSLPC_INFO
*info
, int enable
, struct tty_struct
*tty
);
428 static int tx_abort(MGSLPC_INFO
*info
);
429 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
430 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
432 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
433 static int mgslpc_device_count
= 0;
436 * Set this param to non-zero to load eax with the
437 * .text section address and breakpoint on module load.
438 * This is useful for use with gdb and add-symbol-file command.
440 static bool break_on_load
;
443 * Driver major number, defaults to zero to get auto
444 * assigned major number. May be forced as module parameter.
446 static int ttymajor
=0;
448 static int debug_level
= 0;
449 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
451 module_param(break_on_load
, bool, 0);
452 module_param(ttymajor
, int, 0);
453 module_param(debug_level
, int, 0);
454 module_param_array(maxframe
, int, NULL
, 0);
456 MODULE_LICENSE("GPL");
458 static char *driver_name
= "SyncLink PC Card driver";
459 static char *driver_version
= "$Revision: 4.34 $";
461 static struct tty_driver
*serial_driver
;
463 /* number of characters left in xmit buffer before we ask for more */
464 #define WAKEUP_CHARS 256
466 static void mgslpc_change_params(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
467 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
469 /* PCMCIA prototypes */
471 static int mgslpc_config(struct pcmcia_device
*link
);
472 static void mgslpc_release(u_long arg
);
473 static void mgslpc_detach(struct pcmcia_device
*p_dev
);
476 * 1st function defined in .text section. Calling this function in
477 * init_module() followed by a breakpoint allows a remote debugger
478 * (gdb) to get the .text address for the add-symbol-file command.
479 * This allows remote debugging of dynamically loadable modules.
481 static void* mgslpc_get_text_ptr(void)
483 return mgslpc_get_text_ptr
;
487 * line discipline callback wrappers
489 * The wrappers maintain line discipline references
490 * while calling into the line discipline.
492 * ldisc_receive_buf - pass receive data to line discipline
495 static void ldisc_receive_buf(struct tty_struct
*tty
,
496 const __u8
*data
, char *flags
, int count
)
498 struct tty_ldisc
*ld
;
501 ld
= tty_ldisc_ref(tty
);
503 if (ld
->ops
->receive_buf
)
504 ld
->ops
->receive_buf(tty
, data
, flags
, count
);
509 static const struct tty_port_operations mgslpc_port_ops
= {
510 .carrier_raised
= carrier_raised
,
514 static int mgslpc_probe(struct pcmcia_device
*link
)
519 if (debug_level
>= DEBUG_LEVEL_INFO
)
520 printk("mgslpc_attach\n");
522 info
= kzalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
524 printk("Error can't allocate device instance data\n");
528 info
->magic
= MGSLPC_MAGIC
;
529 tty_port_init(&info
->port
);
530 info
->port
.ops
= &mgslpc_port_ops
;
531 INIT_WORK(&info
->task
, bh_handler
);
532 info
->max_frame_size
= 4096;
533 init_waitqueue_head(&info
->status_event_wait_q
);
534 init_waitqueue_head(&info
->event_wait_q
);
535 spin_lock_init(&info
->lock
);
536 spin_lock_init(&info
->netlock
);
537 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
538 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
539 info
->imra_value
= 0xffff;
540 info
->imrb_value
= 0xffff;
541 info
->pim_value
= 0xff;
546 /* Initialize the struct pcmcia_device structure */
548 ret
= mgslpc_config(link
);
552 ret
= mgslpc_add_device(info
);
559 mgslpc_release((u_long
)link
);
561 tty_port_destroy(&info
->port
);
566 /* Card has been inserted.
569 static int mgslpc_ioprobe(struct pcmcia_device
*p_dev
, void *priv_data
)
571 return pcmcia_request_io(p_dev
);
574 static int mgslpc_config(struct pcmcia_device
*link
)
576 MGSLPC_INFO
*info
= link
->priv
;
579 if (debug_level
>= DEBUG_LEVEL_INFO
)
580 printk("mgslpc_config(0x%p)\n", link
);
582 link
->config_flags
|= CONF_ENABLE_IRQ
| CONF_AUTO_SET_IO
;
584 ret
= pcmcia_loop_config(link
, mgslpc_ioprobe
, NULL
);
588 link
->config_index
= 8;
589 link
->config_regs
= PRESENT_OPTION
;
591 ret
= pcmcia_request_irq(link
, mgslpc_isr
);
594 ret
= pcmcia_enable_device(link
);
598 info
->io_base
= link
->resource
[0]->start
;
599 info
->irq_level
= link
->irq
;
603 mgslpc_release((u_long
)link
);
607 /* Card has been removed.
608 * Unregister device and release PCMCIA configuration.
609 * If device is open, postpone until it is closed.
611 static void mgslpc_release(u_long arg
)
613 struct pcmcia_device
*link
= (struct pcmcia_device
*)arg
;
615 if (debug_level
>= DEBUG_LEVEL_INFO
)
616 printk("mgslpc_release(0x%p)\n", link
);
618 pcmcia_disable_device(link
);
621 static void mgslpc_detach(struct pcmcia_device
*link
)
623 if (debug_level
>= DEBUG_LEVEL_INFO
)
624 printk("mgslpc_detach(0x%p)\n", link
);
626 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
627 mgslpc_release((u_long
)link
);
629 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
632 static int mgslpc_suspend(struct pcmcia_device
*link
)
634 MGSLPC_INFO
*info
= link
->priv
;
641 static int mgslpc_resume(struct pcmcia_device
*link
)
643 MGSLPC_INFO
*info
= link
->priv
;
651 static inline bool mgslpc_paranoia_check(MGSLPC_INFO
*info
,
652 char *name
, const char *routine
)
654 #ifdef MGSLPC_PARANOIA_CHECK
655 static const char *badmagic
=
656 "Warning: bad magic number for mgsl struct (%s) in %s\n";
657 static const char *badinfo
=
658 "Warning: null mgslpc_info for (%s) in %s\n";
661 printk(badinfo
, name
, routine
);
664 if (info
->magic
!= MGSLPC_MAGIC
) {
665 printk(badmagic
, name
, routine
);
676 #define CMD_RXFIFO BIT7 // release current rx FIFO
677 #define CMD_RXRESET BIT6 // receiver reset
678 #define CMD_RXFIFO_READ BIT5
679 #define CMD_START_TIMER BIT4
680 #define CMD_TXFIFO BIT3 // release current tx FIFO
681 #define CMD_TXEOM BIT1 // transmit end message
682 #define CMD_TXRESET BIT0 // transmit reset
684 static bool wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
687 /* wait for command completion */
688 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
696 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
698 wait_command_complete(info
, channel
);
699 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
702 static void tx_pause(struct tty_struct
*tty
)
704 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
707 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
709 if (debug_level
>= DEBUG_LEVEL_INFO
)
710 printk("tx_pause(%s)\n", info
->device_name
);
712 spin_lock_irqsave(&info
->lock
, flags
);
713 if (info
->tx_enabled
)
715 spin_unlock_irqrestore(&info
->lock
, flags
);
718 static void tx_release(struct tty_struct
*tty
)
720 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
723 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
725 if (debug_level
>= DEBUG_LEVEL_INFO
)
726 printk("tx_release(%s)\n", info
->device_name
);
728 spin_lock_irqsave(&info
->lock
, flags
);
729 if (!info
->tx_enabled
)
731 spin_unlock_irqrestore(&info
->lock
, flags
);
734 /* Return next bottom half action to perform.
735 * or 0 if nothing to do.
737 static int bh_action(MGSLPC_INFO
*info
)
742 spin_lock_irqsave(&info
->lock
, flags
);
744 if (info
->pending_bh
& BH_RECEIVE
) {
745 info
->pending_bh
&= ~BH_RECEIVE
;
747 } else if (info
->pending_bh
& BH_TRANSMIT
) {
748 info
->pending_bh
&= ~BH_TRANSMIT
;
750 } else if (info
->pending_bh
& BH_STATUS
) {
751 info
->pending_bh
&= ~BH_STATUS
;
756 /* Mark BH routine as complete */
757 info
->bh_running
= false;
758 info
->bh_requested
= false;
761 spin_unlock_irqrestore(&info
->lock
, flags
);
766 static void bh_handler(struct work_struct
*work
)
768 MGSLPC_INFO
*info
= container_of(work
, MGSLPC_INFO
, task
);
769 struct tty_struct
*tty
;
772 if (debug_level
>= DEBUG_LEVEL_BH
)
773 printk("%s(%d):bh_handler(%s) entry\n",
774 __FILE__
,__LINE__
,info
->device_name
);
776 info
->bh_running
= true;
777 tty
= tty_port_tty_get(&info
->port
);
779 while((action
= bh_action(info
)) != 0) {
781 /* Process work item */
782 if (debug_level
>= DEBUG_LEVEL_BH
)
783 printk("%s(%d):bh_handler() work item action=%d\n",
784 __FILE__
,__LINE__
,action
);
789 while(rx_get_frame(info
, tty
));
792 bh_transmit(info
, tty
);
798 /* unknown work item ID */
799 printk("Unknown work item ID=%08X!\n", action
);
805 if (debug_level
>= DEBUG_LEVEL_BH
)
806 printk("%s(%d):bh_handler(%s) exit\n",
807 __FILE__
,__LINE__
,info
->device_name
);
810 static void bh_transmit(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
812 if (debug_level
>= DEBUG_LEVEL_BH
)
813 printk("bh_transmit() entry on %s\n", info
->device_name
);
819 static void bh_status(MGSLPC_INFO
*info
)
821 info
->ri_chkcount
= 0;
822 info
->dsr_chkcount
= 0;
823 info
->dcd_chkcount
= 0;
824 info
->cts_chkcount
= 0;
827 /* eom: non-zero = end of frame */
828 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
830 unsigned char data
[2];
831 unsigned char fifo_count
, read_count
, i
;
832 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
834 if (debug_level
>= DEBUG_LEVEL_ISR
)
835 printk("%s(%d):rx_ready_hdlc(eom=%d)\n", __FILE__
, __LINE__
, eom
);
837 if (!info
->rx_enabled
)
840 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
841 /* no more free buffers */
842 issue_command(info
, CHA
, CMD_RXRESET
);
843 info
->pending_bh
|= BH_RECEIVE
;
844 info
->rx_overflow
= true;
845 info
->icount
.buf_overrun
++;
850 /* end of frame, get FIFO count from RBCL register */
851 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
858 if (fifo_count
== 1) {
860 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
863 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
865 fifo_count
-= read_count
;
866 if (!fifo_count
&& eom
)
867 buf
->status
= data
[--read_count
];
869 for (i
= 0; i
< read_count
; i
++) {
870 if (buf
->count
>= info
->max_frame_size
) {
871 /* frame too large, reset receiver and reset current buffer */
872 issue_command(info
, CHA
, CMD_RXRESET
);
876 *(buf
->data
+ buf
->count
) = data
[i
];
879 } while (fifo_count
);
882 info
->pending_bh
|= BH_RECEIVE
;
883 info
->rx_frame_count
++;
885 if (info
->rx_put
>= info
->rx_buf_count
)
888 issue_command(info
, CHA
, CMD_RXFIFO
);
891 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
)
893 struct tty_port
*port
= &info
->port
;
894 unsigned char data
, status
, flag
;
897 struct mgsl_icount
*icount
= &info
->icount
;
900 /* early termination, get FIFO count from RBCL register */
901 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
903 /* Zero fifo count could mean 0 or 32 bytes available.
904 * If BIT5 of STAR is set then at least 1 byte is available.
906 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
911 tty_buffer_request_room(port
, fifo_count
);
912 /* Flush received async data to receive data buffer. */
914 data
= read_reg(info
, CHA
+ RXFIFO
);
915 status
= read_reg(info
, CHA
+ RXFIFO
);
921 // if no frameing/crc error then save data
923 // BIT6:framing error
925 if (status
& (BIT7
+ BIT6
)) {
931 /* discard char if tty control flags say so */
932 if (status
& info
->ignore_status_mask
)
935 status
&= info
->read_status_mask
;
939 else if (status
& BIT6
)
942 work
+= tty_insert_flip_char(port
, data
, flag
);
944 issue_command(info
, CHA
, CMD_RXFIFO
);
946 if (debug_level
>= DEBUG_LEVEL_ISR
) {
947 printk("%s(%d):rx_ready_async",
949 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
950 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
951 icount
->parity
,icount
->frame
,icount
->overrun
);
955 tty_flip_buffer_push(port
);
959 static void tx_done(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
961 if (!info
->tx_active
)
964 info
->tx_active
= false;
965 info
->tx_aborting
= false;
967 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
970 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
971 del_timer(&info
->tx_timer
);
973 if (info
->drop_rts_on_tx_done
) {
975 if (info
->serial_signals
& SerialSignal_RTS
) {
976 info
->serial_signals
&= ~SerialSignal_RTS
;
979 info
->drop_rts_on_tx_done
= false;
982 #if SYNCLINK_GENERIC_HDLC
984 hdlcdev_tx_done(info
);
988 if (tty
&& (tty
->flow
.stopped
|| tty
->hw_stopped
)) {
992 info
->pending_bh
|= BH_TRANSMIT
;
996 static void tx_ready(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
998 unsigned char fifo_count
= 32;
1001 if (debug_level
>= DEBUG_LEVEL_ISR
)
1002 printk("%s(%d):tx_ready(%s)\n", __FILE__
, __LINE__
, info
->device_name
);
1004 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1005 if (!info
->tx_active
)
1008 if (tty
&& (tty
->flow
.stopped
|| tty
->hw_stopped
)) {
1012 if (!info
->tx_count
)
1013 info
->tx_active
= false;
1016 if (!info
->tx_count
)
1019 while (info
->tx_count
&& fifo_count
) {
1020 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1023 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1025 write_reg16(info
, CHA
+ TXFIFO
,
1026 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1028 info
->tx_count
-= c
;
1029 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1033 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1034 if (info
->tx_count
< WAKEUP_CHARS
)
1035 info
->pending_bh
|= BH_TRANSMIT
;
1036 issue_command(info
, CHA
, CMD_TXFIFO
);
1039 issue_command(info
, CHA
, CMD_TXFIFO
);
1041 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1045 static void cts_change(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1048 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1049 irq_disable(info
, CHB
, IRQ_CTS
);
1051 if (info
->serial_signals
& SerialSignal_CTS
)
1052 info
->input_signal_events
.cts_up
++;
1054 info
->input_signal_events
.cts_down
++;
1055 wake_up_interruptible(&info
->status_event_wait_q
);
1056 wake_up_interruptible(&info
->event_wait_q
);
1058 if (tty
&& tty_port_cts_enabled(&info
->port
)) {
1059 if (tty
->hw_stopped
) {
1060 if (info
->serial_signals
& SerialSignal_CTS
) {
1061 if (debug_level
>= DEBUG_LEVEL_ISR
)
1062 printk("CTS tx start...");
1063 tty
->hw_stopped
= 0;
1064 tx_start(info
, tty
);
1065 info
->pending_bh
|= BH_TRANSMIT
;
1069 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1070 if (debug_level
>= DEBUG_LEVEL_ISR
)
1071 printk("CTS tx stop...");
1072 tty
->hw_stopped
= 1;
1077 info
->pending_bh
|= BH_STATUS
;
1080 static void dcd_change(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1083 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1084 irq_disable(info
, CHB
, IRQ_DCD
);
1086 if (info
->serial_signals
& SerialSignal_DCD
) {
1087 info
->input_signal_events
.dcd_up
++;
1090 info
->input_signal_events
.dcd_down
++;
1091 #if SYNCLINK_GENERIC_HDLC
1092 if (info
->netcount
) {
1093 if (info
->serial_signals
& SerialSignal_DCD
)
1094 netif_carrier_on(info
->netdev
);
1096 netif_carrier_off(info
->netdev
);
1099 wake_up_interruptible(&info
->status_event_wait_q
);
1100 wake_up_interruptible(&info
->event_wait_q
);
1102 if (tty_port_check_carrier(&info
->port
)) {
1103 if (debug_level
>= DEBUG_LEVEL_ISR
)
1104 printk("%s CD now %s...", info
->device_name
,
1105 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1106 if (info
->serial_signals
& SerialSignal_DCD
)
1107 wake_up_interruptible(&info
->port
.open_wait
);
1109 if (debug_level
>= DEBUG_LEVEL_ISR
)
1110 printk("doing serial hangup...");
1115 info
->pending_bh
|= BH_STATUS
;
1118 static void dsr_change(MGSLPC_INFO
*info
)
1121 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1122 port_irq_disable(info
, PVR_DSR
);
1124 if (info
->serial_signals
& SerialSignal_DSR
)
1125 info
->input_signal_events
.dsr_up
++;
1127 info
->input_signal_events
.dsr_down
++;
1128 wake_up_interruptible(&info
->status_event_wait_q
);
1129 wake_up_interruptible(&info
->event_wait_q
);
1130 info
->pending_bh
|= BH_STATUS
;
1133 static void ri_change(MGSLPC_INFO
*info
)
1136 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1137 port_irq_disable(info
, PVR_RI
);
1139 if (info
->serial_signals
& SerialSignal_RI
)
1140 info
->input_signal_events
.ri_up
++;
1142 info
->input_signal_events
.ri_down
++;
1143 wake_up_interruptible(&info
->status_event_wait_q
);
1144 wake_up_interruptible(&info
->event_wait_q
);
1145 info
->pending_bh
|= BH_STATUS
;
1148 /* Interrupt service routine entry point.
1152 * irq interrupt number that caused interrupt
1153 * dev_id device ID supplied during interrupt registration
1155 static irqreturn_t
mgslpc_isr(int dummy
, void *dev_id
)
1157 MGSLPC_INFO
*info
= dev_id
;
1158 struct tty_struct
*tty
;
1160 unsigned char gis
, pis
;
1163 if (debug_level
>= DEBUG_LEVEL_ISR
)
1164 printk("mgslpc_isr(%d) entry.\n", info
->irq_level
);
1166 if (!(info
->p_dev
->_locked
))
1169 tty
= tty_port_tty_get(&info
->port
);
1171 spin_lock(&info
->lock
);
1173 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1174 if (debug_level
>= DEBUG_LEVEL_ISR
)
1175 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1177 if ((gis
& 0x70) || count
> 1000) {
1178 printk("synclink_cs:hardware failed or ejected\n");
1183 if (gis
& (BIT1
| BIT0
)) {
1184 isr
= read_reg16(info
, CHB
+ ISR
);
1186 dcd_change(info
, tty
);
1188 cts_change(info
, tty
);
1190 if (gis
& (BIT3
| BIT2
))
1192 isr
= read_reg16(info
, CHA
+ ISR
);
1193 if (isr
& IRQ_TIMER
) {
1194 info
->irq_occurred
= true;
1195 irq_disable(info
, CHA
, IRQ_TIMER
);
1199 if (isr
& IRQ_EXITHUNT
) {
1200 info
->icount
.exithunt
++;
1201 wake_up_interruptible(&info
->event_wait_q
);
1203 if (isr
& IRQ_BREAK_ON
) {
1205 if (info
->port
.flags
& ASYNC_SAK
)
1208 if (isr
& IRQ_RXTIME
) {
1209 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1211 if (isr
& (IRQ_RXEOM
| IRQ_RXFIFO
)) {
1212 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1213 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1215 rx_ready_async(info
, isr
& IRQ_RXEOM
);
1219 if (isr
& IRQ_UNDERRUN
) {
1220 if (info
->tx_aborting
)
1221 info
->icount
.txabort
++;
1223 info
->icount
.txunder
++;
1226 else if (isr
& IRQ_ALLSENT
) {
1227 info
->icount
.txok
++;
1230 else if (isr
& IRQ_TXFIFO
)
1231 tx_ready(info
, tty
);
1234 pis
= read_reg(info
, CHA
+ PIS
);
1242 /* Request bottom half processing if there's something
1243 * for it to do and the bh is not already running
1246 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1247 if (debug_level
>= DEBUG_LEVEL_ISR
)
1248 printk("%s(%d):%s queueing bh task.\n",
1249 __FILE__
,__LINE__
,info
->device_name
);
1250 schedule_work(&info
->task
);
1251 info
->bh_requested
= true;
1254 spin_unlock(&info
->lock
);
1257 if (debug_level
>= DEBUG_LEVEL_ISR
)
1258 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1259 __FILE__
, __LINE__
, info
->irq_level
);
1264 /* Initialize and start device.
1266 static int startup(MGSLPC_INFO
* info
, struct tty_struct
*tty
)
1270 if (debug_level
>= DEBUG_LEVEL_INFO
)
1271 printk("%s(%d):startup(%s)\n", __FILE__
, __LINE__
, info
->device_name
);
1273 if (tty_port_initialized(&info
->port
))
1276 if (!info
->tx_buf
) {
1277 /* allocate a page of memory for a transmit buffer */
1278 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1279 if (!info
->tx_buf
) {
1280 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1281 __FILE__
, __LINE__
, info
->device_name
);
1286 info
->pending_bh
= 0;
1288 memset(&info
->icount
, 0, sizeof(info
->icount
));
1290 timer_setup(&info
->tx_timer
, tx_timeout
, 0);
1292 /* Allocate and claim adapter resources */
1293 retval
= claim_resources(info
);
1295 /* perform existence check and diagnostics */
1297 retval
= adapter_test(info
);
1300 if (capable(CAP_SYS_ADMIN
) && tty
)
1301 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1302 release_resources(info
);
1306 /* program hardware for current parameters */
1307 mgslpc_change_params(info
, tty
);
1310 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
1312 tty_port_set_initialized(&info
->port
, 1);
1317 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1319 static void shutdown(MGSLPC_INFO
* info
, struct tty_struct
*tty
)
1321 unsigned long flags
;
1323 if (!tty_port_initialized(&info
->port
))
1326 if (debug_level
>= DEBUG_LEVEL_INFO
)
1327 printk("%s(%d):mgslpc_shutdown(%s)\n",
1328 __FILE__
, __LINE__
, info
->device_name
);
1330 /* clear status wait queue because status changes */
1331 /* can't happen after shutting down the hardware */
1332 wake_up_interruptible(&info
->status_event_wait_q
);
1333 wake_up_interruptible(&info
->event_wait_q
);
1335 del_timer_sync(&info
->tx_timer
);
1338 free_page((unsigned long) info
->tx_buf
);
1339 info
->tx_buf
= NULL
;
1342 spin_lock_irqsave(&info
->lock
, flags
);
1347 /* TODO:disable interrupts instead of reset to preserve signal states */
1350 if (!tty
|| C_HUPCL(tty
)) {
1351 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
1355 spin_unlock_irqrestore(&info
->lock
, flags
);
1357 release_resources(info
);
1360 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1362 tty_port_set_initialized(&info
->port
, 0);
1365 static void mgslpc_program_hw(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1367 unsigned long flags
;
1369 spin_lock_irqsave(&info
->lock
, flags
);
1373 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1375 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1382 info
->dcd_chkcount
= 0;
1383 info
->cts_chkcount
= 0;
1384 info
->ri_chkcount
= 0;
1385 info
->dsr_chkcount
= 0;
1387 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1388 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1391 if (info
->netcount
|| (tty
&& C_CREAD(tty
)))
1394 spin_unlock_irqrestore(&info
->lock
, flags
);
1397 /* Reconfigure adapter based on new parameters
1399 static void mgslpc_change_params(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1407 if (debug_level
>= DEBUG_LEVEL_INFO
)
1408 printk("%s(%d):mgslpc_change_params(%s)\n",
1409 __FILE__
, __LINE__
, info
->device_name
);
1411 cflag
= tty
->termios
.c_cflag
;
1413 /* if B0 rate (hangup) specified then negate RTS and DTR */
1414 /* otherwise assert RTS and DTR */
1416 info
->serial_signals
|= SerialSignal_RTS
| SerialSignal_DTR
;
1418 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
1420 /* byte size and parity */
1422 info
->params
.data_bits
= tty_get_char_size(cflag
);
1425 info
->params
.stop_bits
= 2;
1427 info
->params
.stop_bits
= 1;
1429 info
->params
.parity
= ASYNC_PARITY_NONE
;
1430 if (cflag
& PARENB
) {
1432 info
->params
.parity
= ASYNC_PARITY_ODD
;
1434 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1437 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1441 /* calculate number of jiffies to transmit a full
1442 * FIFO (32 bytes) at specified data rate
1444 bits_per_char
= info
->params
.data_bits
+
1445 info
->params
.stop_bits
+ 1;
1447 /* if port data rate is set to 460800 or less then
1448 * allow tty settings to override, otherwise keep the
1449 * current data rate.
1451 if (info
->params
.data_rate
<= 460800) {
1452 info
->params
.data_rate
= tty_get_baud_rate(tty
);
1455 if (info
->params
.data_rate
) {
1456 info
->timeout
= (32*HZ
*bits_per_char
) /
1457 info
->params
.data_rate
;
1459 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1461 tty_port_set_cts_flow(&info
->port
, cflag
& CRTSCTS
);
1462 tty_port_set_check_carrier(&info
->port
, ~cflag
& CLOCAL
);
1464 /* process tty input control flags */
1466 info
->read_status_mask
= 0;
1468 info
->read_status_mask
|= BIT7
| BIT6
;
1470 info
->ignore_status_mask
|= BIT7
| BIT6
;
1472 mgslpc_program_hw(info
, tty
);
1475 /* Add a character to the transmit buffer
1477 static int mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1479 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1480 unsigned long flags
;
1482 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1483 printk("%s(%d):mgslpc_put_char(%d) on %s\n",
1484 __FILE__
, __LINE__
, ch
, info
->device_name
);
1487 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1493 spin_lock_irqsave(&info
->lock
, flags
);
1495 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1496 if (info
->tx_count
< TXBUFSIZE
- 1) {
1497 info
->tx_buf
[info
->tx_put
++] = ch
;
1498 info
->tx_put
&= TXBUFSIZE
-1;
1503 spin_unlock_irqrestore(&info
->lock
, flags
);
1507 /* Enable transmitter so remaining characters in the
1508 * transmit buffer are sent.
1510 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1512 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1513 unsigned long flags
;
1515 if (debug_level
>= DEBUG_LEVEL_INFO
)
1516 printk("%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1517 __FILE__
, __LINE__
, info
->device_name
, info
->tx_count
);
1519 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1522 if (info
->tx_count
<= 0 || tty
->flow
.stopped
||
1523 tty
->hw_stopped
|| !info
->tx_buf
)
1526 if (debug_level
>= DEBUG_LEVEL_INFO
)
1527 printk("%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1528 __FILE__
, __LINE__
, info
->device_name
);
1530 spin_lock_irqsave(&info
->lock
, flags
);
1531 if (!info
->tx_active
)
1532 tx_start(info
, tty
);
1533 spin_unlock_irqrestore(&info
->lock
, flags
);
1536 /* Send a block of data
1540 * tty pointer to tty information structure
1541 * buf pointer to buffer containing send data
1542 * count size of send data in bytes
1544 * Returns: number of characters written
1546 static int mgslpc_write(struct tty_struct
* tty
,
1547 const unsigned char *buf
, int count
)
1550 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1551 unsigned long flags
;
1553 if (debug_level
>= DEBUG_LEVEL_INFO
)
1554 printk("%s(%d):mgslpc_write(%s) count=%d\n",
1555 __FILE__
, __LINE__
, info
->device_name
, count
);
1557 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1561 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1562 if (count
> TXBUFSIZE
) {
1566 if (info
->tx_active
)
1568 else if (info
->tx_count
)
1574 min(TXBUFSIZE
- info
->tx_count
- 1,
1575 TXBUFSIZE
- info
->tx_put
));
1579 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1581 spin_lock_irqsave(&info
->lock
, flags
);
1582 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1583 info
->tx_count
+= c
;
1584 spin_unlock_irqrestore(&info
->lock
, flags
);
1591 if (info
->tx_count
&& !tty
->flow
.stopped
&& !tty
->hw_stopped
) {
1592 spin_lock_irqsave(&info
->lock
, flags
);
1593 if (!info
->tx_active
)
1594 tx_start(info
, tty
);
1595 spin_unlock_irqrestore(&info
->lock
, flags
);
1598 if (debug_level
>= DEBUG_LEVEL_INFO
)
1599 printk("%s(%d):mgslpc_write(%s) returning=%d\n",
1600 __FILE__
, __LINE__
, info
->device_name
, ret
);
1604 /* Return the count of free bytes in transmit buffer
1606 static unsigned int mgslpc_write_room(struct tty_struct
*tty
)
1608 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1611 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1614 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1615 /* HDLC (frame oriented) mode */
1616 if (info
->tx_active
)
1619 return HDLC_MAX_FRAME_SIZE
;
1621 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1626 if (debug_level
>= DEBUG_LEVEL_INFO
)
1627 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1628 __FILE__
, __LINE__
, info
->device_name
, ret
);
1632 /* Return the count of bytes in transmit buffer
1634 static unsigned int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1636 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1639 if (debug_level
>= DEBUG_LEVEL_INFO
)
1640 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1641 __FILE__
, __LINE__
, info
->device_name
);
1643 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1646 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1647 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1649 rc
= info
->tx_count
;
1651 if (debug_level
>= DEBUG_LEVEL_INFO
)
1652 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%u\n",
1653 __FILE__
, __LINE__
, info
->device_name
, rc
);
1658 /* Discard all data in the send buffer
1660 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1662 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1663 unsigned long flags
;
1665 if (debug_level
>= DEBUG_LEVEL_INFO
)
1666 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1667 __FILE__
, __LINE__
, info
->device_name
);
1669 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1672 spin_lock_irqsave(&info
->lock
, flags
);
1673 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1674 del_timer(&info
->tx_timer
);
1675 spin_unlock_irqrestore(&info
->lock
, flags
);
1677 wake_up_interruptible(&tty
->write_wait
);
1681 /* Send a high-priority XON/XOFF character
1683 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1685 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1686 unsigned long flags
;
1688 if (debug_level
>= DEBUG_LEVEL_INFO
)
1689 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1690 __FILE__
, __LINE__
, info
->device_name
, ch
);
1692 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1697 spin_lock_irqsave(&info
->lock
, flags
);
1698 if (!info
->tx_enabled
)
1699 tx_start(info
, tty
);
1700 spin_unlock_irqrestore(&info
->lock
, flags
);
1704 /* Signal remote device to throttle send data (our receive data)
1706 static void mgslpc_throttle(struct tty_struct
* tty
)
1708 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1709 unsigned long flags
;
1711 if (debug_level
>= DEBUG_LEVEL_INFO
)
1712 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1713 __FILE__
, __LINE__
, info
->device_name
);
1715 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1719 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1721 if (C_CRTSCTS(tty
)) {
1722 spin_lock_irqsave(&info
->lock
, flags
);
1723 info
->serial_signals
&= ~SerialSignal_RTS
;
1725 spin_unlock_irqrestore(&info
->lock
, flags
);
1729 /* Signal remote device to stop throttling send data (our receive data)
1731 static void mgslpc_unthrottle(struct tty_struct
* tty
)
1733 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1734 unsigned long flags
;
1736 if (debug_level
>= DEBUG_LEVEL_INFO
)
1737 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1738 __FILE__
, __LINE__
, info
->device_name
);
1740 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1747 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1750 if (C_CRTSCTS(tty
)) {
1751 spin_lock_irqsave(&info
->lock
, flags
);
1752 info
->serial_signals
|= SerialSignal_RTS
;
1754 spin_unlock_irqrestore(&info
->lock
, flags
);
1758 /* get the current serial statistics
1760 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1763 if (debug_level
>= DEBUG_LEVEL_INFO
)
1764 printk("get_params(%s)\n", info
->device_name
);
1766 memset(&info
->icount
, 0, sizeof(info
->icount
));
1768 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1775 /* get the current serial parameters
1777 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1780 if (debug_level
>= DEBUG_LEVEL_INFO
)
1781 printk("get_params(%s)\n", info
->device_name
);
1782 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1788 /* set the serial parameters
1792 * info pointer to device instance data
1793 * new_params user buffer containing new serial params
1795 * Returns: 0 if success, otherwise error code
1797 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
, struct tty_struct
*tty
)
1799 unsigned long flags
;
1800 MGSL_PARAMS tmp_params
;
1803 if (debug_level
>= DEBUG_LEVEL_INFO
)
1804 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1806 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1808 if (debug_level
>= DEBUG_LEVEL_INFO
)
1809 printk("%s(%d):set_params(%s) user buffer copy failed\n",
1810 __FILE__
, __LINE__
, info
->device_name
);
1814 spin_lock_irqsave(&info
->lock
, flags
);
1815 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
1816 spin_unlock_irqrestore(&info
->lock
, flags
);
1818 mgslpc_change_params(info
, tty
);
1823 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
1826 if (debug_level
>= DEBUG_LEVEL_INFO
)
1827 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
1828 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
1834 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
1836 unsigned long flags
;
1837 if (debug_level
>= DEBUG_LEVEL_INFO
)
1838 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
1839 spin_lock_irqsave(&info
->lock
, flags
);
1840 info
->idle_mode
= idle_mode
;
1842 spin_unlock_irqrestore(&info
->lock
, flags
);
1846 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
1849 if (debug_level
>= DEBUG_LEVEL_INFO
)
1850 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
1851 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
1857 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
1859 unsigned long flags
;
1861 if (debug_level
>= DEBUG_LEVEL_INFO
)
1862 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
1863 spin_lock_irqsave(&info
->lock
, flags
);
1864 info
->if_mode
= if_mode
;
1866 val
= read_reg(info
, PVR
) & 0x0f;
1867 switch (info
->if_mode
)
1869 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
1870 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
1871 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
1873 write_reg(info
, PVR
, val
);
1875 spin_unlock_irqrestore(&info
->lock
, flags
);
1879 static int set_txenable(MGSLPC_INFO
* info
, int enable
, struct tty_struct
*tty
)
1881 unsigned long flags
;
1883 if (debug_level
>= DEBUG_LEVEL_INFO
)
1884 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
1886 spin_lock_irqsave(&info
->lock
, flags
);
1888 if (!info
->tx_enabled
)
1889 tx_start(info
, tty
);
1891 if (info
->tx_enabled
)
1894 spin_unlock_irqrestore(&info
->lock
, flags
);
1898 static int tx_abort(MGSLPC_INFO
* info
)
1900 unsigned long flags
;
1902 if (debug_level
>= DEBUG_LEVEL_INFO
)
1903 printk("tx_abort(%s)\n", info
->device_name
);
1905 spin_lock_irqsave(&info
->lock
, flags
);
1906 if (info
->tx_active
&& info
->tx_count
&&
1907 info
->params
.mode
== MGSL_MODE_HDLC
) {
1908 /* clear data count so FIFO is not filled on next IRQ.
1909 * This results in underrun and abort transmission.
1911 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1912 info
->tx_aborting
= true;
1914 spin_unlock_irqrestore(&info
->lock
, flags
);
1918 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
1920 unsigned long flags
;
1922 if (debug_level
>= DEBUG_LEVEL_INFO
)
1923 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
1925 spin_lock_irqsave(&info
->lock
, flags
);
1927 if (!info
->rx_enabled
)
1930 if (info
->rx_enabled
)
1933 spin_unlock_irqrestore(&info
->lock
, flags
);
1937 /* wait for specified event to occur
1939 * Arguments: info pointer to device instance data
1940 * mask pointer to bitmask of events to wait for
1941 * Return Value: 0 if successful and bit mask updated with
1942 * of events triggerred,
1943 * otherwise error code
1945 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
1947 unsigned long flags
;
1950 struct mgsl_icount cprev
, cnow
;
1953 struct _input_signal_events oldsigs
, newsigs
;
1954 DECLARE_WAITQUEUE(wait
, current
);
1956 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
1960 if (debug_level
>= DEBUG_LEVEL_INFO
)
1961 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
1963 spin_lock_irqsave(&info
->lock
, flags
);
1965 /* return immediately if state matches requested events */
1967 s
= info
->serial_signals
;
1969 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
1970 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
1971 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
1972 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
1974 spin_unlock_irqrestore(&info
->lock
, flags
);
1978 /* save current irq counts */
1979 cprev
= info
->icount
;
1980 oldsigs
= info
->input_signal_events
;
1982 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
1983 (mask
& MgslEvent_ExitHuntMode
))
1984 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
1986 set_current_state(TASK_INTERRUPTIBLE
);
1987 add_wait_queue(&info
->event_wait_q
, &wait
);
1989 spin_unlock_irqrestore(&info
->lock
, flags
);
1994 if (signal_pending(current
)) {
1999 /* get current irq counts */
2000 spin_lock_irqsave(&info
->lock
, flags
);
2001 cnow
= info
->icount
;
2002 newsigs
= info
->input_signal_events
;
2003 set_current_state(TASK_INTERRUPTIBLE
);
2004 spin_unlock_irqrestore(&info
->lock
, flags
);
2006 /* if no change, wait aborted for some reason */
2007 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2008 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2009 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2010 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2011 newsigs
.cts_up
== oldsigs
.cts_up
&&
2012 newsigs
.cts_down
== oldsigs
.cts_down
&&
2013 newsigs
.ri_up
== oldsigs
.ri_up
&&
2014 newsigs
.ri_down
== oldsigs
.ri_down
&&
2015 cnow
.exithunt
== cprev
.exithunt
&&
2016 cnow
.rxidle
== cprev
.rxidle
) {
2022 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2023 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2024 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2025 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2026 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2027 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2028 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2029 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2030 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2031 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2039 remove_wait_queue(&info
->event_wait_q
, &wait
);
2040 set_current_state(TASK_RUNNING
);
2042 if (mask
& MgslEvent_ExitHuntMode
) {
2043 spin_lock_irqsave(&info
->lock
, flags
);
2044 if (!waitqueue_active(&info
->event_wait_q
))
2045 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2046 spin_unlock_irqrestore(&info
->lock
, flags
);
2050 PUT_USER(rc
, events
, mask_ptr
);
2054 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2056 unsigned long flags
;
2058 struct mgsl_icount cprev
, cnow
;
2059 DECLARE_WAITQUEUE(wait
, current
);
2061 /* save current irq counts */
2062 spin_lock_irqsave(&info
->lock
, flags
);
2063 cprev
= info
->icount
;
2064 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2065 set_current_state(TASK_INTERRUPTIBLE
);
2066 spin_unlock_irqrestore(&info
->lock
, flags
);
2070 if (signal_pending(current
)) {
2075 /* get new irq counts */
2076 spin_lock_irqsave(&info
->lock
, flags
);
2077 cnow
= info
->icount
;
2078 set_current_state(TASK_INTERRUPTIBLE
);
2079 spin_unlock_irqrestore(&info
->lock
, flags
);
2081 /* if no change, wait aborted for some reason */
2082 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2083 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2088 /* check for change in caller specified modem input */
2089 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2090 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2091 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2092 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2099 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2100 set_current_state(TASK_RUNNING
);
2104 /* return the state of the serial control and status signals
2106 static int tiocmget(struct tty_struct
*tty
)
2108 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2109 unsigned int result
;
2110 unsigned long flags
;
2112 spin_lock_irqsave(&info
->lock
, flags
);
2114 spin_unlock_irqrestore(&info
->lock
, flags
);
2116 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2117 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2118 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2119 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2120 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2121 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2123 if (debug_level
>= DEBUG_LEVEL_INFO
)
2124 printk("%s(%d):%s tiocmget() value=%08X\n",
2125 __FILE__
, __LINE__
, info
->device_name
, result
);
2129 /* set modem control signals (DTR/RTS)
2131 static int tiocmset(struct tty_struct
*tty
,
2132 unsigned int set
, unsigned int clear
)
2134 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2135 unsigned long flags
;
2137 if (debug_level
>= DEBUG_LEVEL_INFO
)
2138 printk("%s(%d):%s tiocmset(%x,%x)\n",
2139 __FILE__
, __LINE__
, info
->device_name
, set
, clear
);
2141 if (set
& TIOCM_RTS
)
2142 info
->serial_signals
|= SerialSignal_RTS
;
2143 if (set
& TIOCM_DTR
)
2144 info
->serial_signals
|= SerialSignal_DTR
;
2145 if (clear
& TIOCM_RTS
)
2146 info
->serial_signals
&= ~SerialSignal_RTS
;
2147 if (clear
& TIOCM_DTR
)
2148 info
->serial_signals
&= ~SerialSignal_DTR
;
2150 spin_lock_irqsave(&info
->lock
, flags
);
2152 spin_unlock_irqrestore(&info
->lock
, flags
);
2157 /* Set or clear transmit break condition
2159 * Arguments: tty pointer to tty instance data
2160 * break_state -1=set break condition, 0=clear
2162 static int mgslpc_break(struct tty_struct
*tty
, int break_state
)
2164 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2165 unsigned long flags
;
2167 if (debug_level
>= DEBUG_LEVEL_INFO
)
2168 printk("%s(%d):mgslpc_break(%s,%d)\n",
2169 __FILE__
, __LINE__
, info
->device_name
, break_state
);
2171 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2174 spin_lock_irqsave(&info
->lock
, flags
);
2175 if (break_state
== -1)
2176 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2178 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2179 spin_unlock_irqrestore(&info
->lock
, flags
);
2183 static int mgslpc_get_icount(struct tty_struct
*tty
,
2184 struct serial_icounter_struct
*icount
)
2186 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2187 struct mgsl_icount cnow
; /* kernel counter temps */
2188 unsigned long flags
;
2190 spin_lock_irqsave(&info
->lock
, flags
);
2191 cnow
= info
->icount
;
2192 spin_unlock_irqrestore(&info
->lock
, flags
);
2194 icount
->cts
= cnow
.cts
;
2195 icount
->dsr
= cnow
.dsr
;
2196 icount
->rng
= cnow
.rng
;
2197 icount
->dcd
= cnow
.dcd
;
2198 icount
->rx
= cnow
.rx
;
2199 icount
->tx
= cnow
.tx
;
2200 icount
->frame
= cnow
.frame
;
2201 icount
->overrun
= cnow
.overrun
;
2202 icount
->parity
= cnow
.parity
;
2203 icount
->brk
= cnow
.brk
;
2204 icount
->buf_overrun
= cnow
.buf_overrun
;
2209 /* Service an IOCTL request
2213 * tty pointer to tty instance data
2214 * cmd IOCTL command code
2215 * arg command argument/context
2217 * Return Value: 0 if success, otherwise error code
2219 static int mgslpc_ioctl(struct tty_struct
*tty
,
2220 unsigned int cmd
, unsigned long arg
)
2222 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2223 void __user
*argp
= (void __user
*)arg
;
2225 if (debug_level
>= DEBUG_LEVEL_INFO
)
2226 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
, __LINE__
,
2227 info
->device_name
, cmd
);
2229 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2232 if (cmd
!= TIOCMIWAIT
) {
2233 if (tty_io_error(tty
))
2238 case MGSL_IOCGPARAMS
:
2239 return get_params(info
, argp
);
2240 case MGSL_IOCSPARAMS
:
2241 return set_params(info
, argp
, tty
);
2242 case MGSL_IOCGTXIDLE
:
2243 return get_txidle(info
, argp
);
2244 case MGSL_IOCSTXIDLE
:
2245 return set_txidle(info
, (int)arg
);
2247 return get_interface(info
, argp
);
2249 return set_interface(info
,(int)arg
);
2250 case MGSL_IOCTXENABLE
:
2251 return set_txenable(info
,(int)arg
, tty
);
2252 case MGSL_IOCRXENABLE
:
2253 return set_rxenable(info
,(int)arg
);
2254 case MGSL_IOCTXABORT
:
2255 return tx_abort(info
);
2256 case MGSL_IOCGSTATS
:
2257 return get_stats(info
, argp
);
2258 case MGSL_IOCWAITEVENT
:
2259 return wait_events(info
, argp
);
2261 return modem_input_wait(info
,(int)arg
);
2263 return -ENOIOCTLCMD
;
2268 /* Set new termios settings
2272 * tty pointer to tty structure
2273 * termios pointer to buffer to hold returned old termios
2275 static void mgslpc_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2277 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2278 unsigned long flags
;
2280 if (debug_level
>= DEBUG_LEVEL_INFO
)
2281 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
, __LINE__
,
2284 /* just return if nothing has changed */
2285 if ((tty
->termios
.c_cflag
== old_termios
->c_cflag
)
2286 && (RELEVANT_IFLAG(tty
->termios
.c_iflag
)
2287 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2290 mgslpc_change_params(info
, tty
);
2292 /* Handle transition to B0 status */
2293 if ((old_termios
->c_cflag
& CBAUD
) && !C_BAUD(tty
)) {
2294 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
2295 spin_lock_irqsave(&info
->lock
, flags
);
2297 spin_unlock_irqrestore(&info
->lock
, flags
);
2300 /* Handle transition away from B0 status */
2301 if (!(old_termios
->c_cflag
& CBAUD
) && C_BAUD(tty
)) {
2302 info
->serial_signals
|= SerialSignal_DTR
;
2303 if (!C_CRTSCTS(tty
) || !tty_throttled(tty
))
2304 info
->serial_signals
|= SerialSignal_RTS
;
2305 spin_lock_irqsave(&info
->lock
, flags
);
2307 spin_unlock_irqrestore(&info
->lock
, flags
);
2310 /* Handle turning off CRTSCTS */
2311 if (old_termios
->c_cflag
& CRTSCTS
&& !C_CRTSCTS(tty
)) {
2312 tty
->hw_stopped
= 0;
2317 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2319 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2320 struct tty_port
*port
= &info
->port
;
2322 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2325 if (debug_level
>= DEBUG_LEVEL_INFO
)
2326 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2327 __FILE__
, __LINE__
, info
->device_name
, port
->count
);
2329 if (tty_port_close_start(port
, tty
, filp
) == 0)
2332 if (tty_port_initialized(port
))
2333 mgslpc_wait_until_sent(tty
, info
->timeout
);
2335 mgslpc_flush_buffer(tty
);
2337 tty_ldisc_flush(tty
);
2338 shutdown(info
, tty
);
2340 tty_port_close_end(port
, tty
);
2341 tty_port_tty_set(port
, NULL
);
2343 if (debug_level
>= DEBUG_LEVEL_INFO
)
2344 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
, __LINE__
,
2345 tty
->driver
->name
, port
->count
);
2348 /* Wait until the transmitter is empty.
2350 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2352 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2353 unsigned long orig_jiffies
, char_time
;
2358 if (debug_level
>= DEBUG_LEVEL_INFO
)
2359 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2360 __FILE__
, __LINE__
, info
->device_name
);
2362 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2365 if (!tty_port_initialized(&info
->port
))
2368 orig_jiffies
= jiffies
;
2370 /* Set check interval to 1/5 of estimated time to
2371 * send a character, and make it at least 1. The check
2372 * interval should also be less than the timeout.
2373 * Note: use tight timings here to satisfy the NIST-PCTS.
2376 if (info
->params
.data_rate
) {
2377 char_time
= info
->timeout
/(32 * 5);
2384 char_time
= min_t(unsigned long, char_time
, timeout
);
2386 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2387 while (info
->tx_active
) {
2388 msleep_interruptible(jiffies_to_msecs(char_time
));
2389 if (signal_pending(current
))
2391 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2395 while ((info
->tx_count
|| info
->tx_active
) &&
2397 msleep_interruptible(jiffies_to_msecs(char_time
));
2398 if (signal_pending(current
))
2400 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2406 if (debug_level
>= DEBUG_LEVEL_INFO
)
2407 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2408 __FILE__
, __LINE__
, info
->device_name
);
2411 /* Called by tty_hangup() when a hangup is signaled.
2412 * This is the same as closing all open files for the port.
2414 static void mgslpc_hangup(struct tty_struct
*tty
)
2416 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2418 if (debug_level
>= DEBUG_LEVEL_INFO
)
2419 printk("%s(%d):mgslpc_hangup(%s)\n",
2420 __FILE__
, __LINE__
, info
->device_name
);
2422 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2425 mgslpc_flush_buffer(tty
);
2426 shutdown(info
, tty
);
2427 tty_port_hangup(&info
->port
);
2430 static int carrier_raised(struct tty_port
*port
)
2432 MGSLPC_INFO
*info
= container_of(port
, MGSLPC_INFO
, port
);
2433 unsigned long flags
;
2435 spin_lock_irqsave(&info
->lock
, flags
);
2437 spin_unlock_irqrestore(&info
->lock
, flags
);
2439 if (info
->serial_signals
& SerialSignal_DCD
)
2444 static void dtr_rts(struct tty_port
*port
, int onoff
)
2446 MGSLPC_INFO
*info
= container_of(port
, MGSLPC_INFO
, port
);
2447 unsigned long flags
;
2449 spin_lock_irqsave(&info
->lock
, flags
);
2451 info
->serial_signals
|= SerialSignal_RTS
| SerialSignal_DTR
;
2453 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
2455 spin_unlock_irqrestore(&info
->lock
, flags
);
2459 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2462 struct tty_port
*port
;
2464 unsigned long flags
;
2466 /* verify range of specified line number */
2468 if (line
>= mgslpc_device_count
) {
2469 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2470 __FILE__
, __LINE__
, line
);
2474 /* find the info structure for the specified line */
2475 info
= mgslpc_device_list
;
2476 while(info
&& info
->line
!= line
)
2477 info
= info
->next_device
;
2478 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2482 tty
->driver_data
= info
;
2483 tty_port_tty_set(port
, tty
);
2485 if (debug_level
>= DEBUG_LEVEL_INFO
)
2486 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2487 __FILE__
, __LINE__
, tty
->driver
->name
, port
->count
);
2489 spin_lock_irqsave(&info
->netlock
, flags
);
2490 if (info
->netcount
) {
2492 spin_unlock_irqrestore(&info
->netlock
, flags
);
2495 spin_lock(&port
->lock
);
2497 spin_unlock(&port
->lock
);
2498 spin_unlock_irqrestore(&info
->netlock
, flags
);
2500 if (port
->count
== 1) {
2501 /* 1st open on this device, init hardware */
2502 retval
= startup(info
, tty
);
2507 retval
= tty_port_block_til_ready(&info
->port
, tty
, filp
);
2509 if (debug_level
>= DEBUG_LEVEL_INFO
)
2510 printk("%s(%d):block_til_ready(%s) returned %d\n",
2511 __FILE__
, __LINE__
, info
->device_name
, retval
);
2515 if (debug_level
>= DEBUG_LEVEL_INFO
)
2516 printk("%s(%d):mgslpc_open(%s) success\n",
2517 __FILE__
, __LINE__
, info
->device_name
);
2525 * /proc fs routines....
2528 static inline void line_info(struct seq_file
*m
, MGSLPC_INFO
*info
)
2531 unsigned long flags
;
2533 seq_printf(m
, "%s:io:%04X irq:%d",
2534 info
->device_name
, info
->io_base
, info
->irq_level
);
2536 /* output current serial signal states */
2537 spin_lock_irqsave(&info
->lock
, flags
);
2539 spin_unlock_irqrestore(&info
->lock
, flags
);
2543 if (info
->serial_signals
& SerialSignal_RTS
)
2544 strcat(stat_buf
, "|RTS");
2545 if (info
->serial_signals
& SerialSignal_CTS
)
2546 strcat(stat_buf
, "|CTS");
2547 if (info
->serial_signals
& SerialSignal_DTR
)
2548 strcat(stat_buf
, "|DTR");
2549 if (info
->serial_signals
& SerialSignal_DSR
)
2550 strcat(stat_buf
, "|DSR");
2551 if (info
->serial_signals
& SerialSignal_DCD
)
2552 strcat(stat_buf
, "|CD");
2553 if (info
->serial_signals
& SerialSignal_RI
)
2554 strcat(stat_buf
, "|RI");
2556 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2557 seq_printf(m
, " HDLC txok:%d rxok:%d",
2558 info
->icount
.txok
, info
->icount
.rxok
);
2559 if (info
->icount
.txunder
)
2560 seq_printf(m
, " txunder:%d", info
->icount
.txunder
);
2561 if (info
->icount
.txabort
)
2562 seq_printf(m
, " txabort:%d", info
->icount
.txabort
);
2563 if (info
->icount
.rxshort
)
2564 seq_printf(m
, " rxshort:%d", info
->icount
.rxshort
);
2565 if (info
->icount
.rxlong
)
2566 seq_printf(m
, " rxlong:%d", info
->icount
.rxlong
);
2567 if (info
->icount
.rxover
)
2568 seq_printf(m
, " rxover:%d", info
->icount
.rxover
);
2569 if (info
->icount
.rxcrc
)
2570 seq_printf(m
, " rxcrc:%d", info
->icount
.rxcrc
);
2572 seq_printf(m
, " ASYNC tx:%d rx:%d",
2573 info
->icount
.tx
, info
->icount
.rx
);
2574 if (info
->icount
.frame
)
2575 seq_printf(m
, " fe:%d", info
->icount
.frame
);
2576 if (info
->icount
.parity
)
2577 seq_printf(m
, " pe:%d", info
->icount
.parity
);
2578 if (info
->icount
.brk
)
2579 seq_printf(m
, " brk:%d", info
->icount
.brk
);
2580 if (info
->icount
.overrun
)
2581 seq_printf(m
, " oe:%d", info
->icount
.overrun
);
2584 /* Append serial signal status to end */
2585 seq_printf(m
, " %s\n", stat_buf
+1);
2587 seq_printf(m
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2588 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2592 /* Called to print information about devices
2594 static int mgslpc_proc_show(struct seq_file
*m
, void *v
)
2598 seq_printf(m
, "synclink driver:%s\n", driver_version
);
2600 info
= mgslpc_device_list
;
2603 info
= info
->next_device
;
2608 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2610 /* each buffer has header and data */
2611 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2613 /* calculate total allocation size for 8 buffers */
2614 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2616 /* limit total allocated memory */
2617 if (info
->rx_buf_total_size
> 0x10000)
2618 info
->rx_buf_total_size
= 0x10000;
2620 /* calculate number of buffers */
2621 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2623 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2624 if (info
->rx_buf
== NULL
)
2627 /* unused flag buffer to satisfy receive_buf calling interface */
2628 info
->flag_buf
= kzalloc(info
->max_frame_size
, GFP_KERNEL
);
2629 if (!info
->flag_buf
) {
2630 kfree(info
->rx_buf
);
2631 info
->rx_buf
= NULL
;
2635 rx_reset_buffers(info
);
2639 static void rx_free_buffers(MGSLPC_INFO
*info
)
2641 kfree(info
->rx_buf
);
2642 info
->rx_buf
= NULL
;
2643 kfree(info
->flag_buf
);
2644 info
->flag_buf
= NULL
;
2647 static int claim_resources(MGSLPC_INFO
*info
)
2649 if (rx_alloc_buffers(info
) < 0) {
2650 printk("Can't allocate rx buffer %s\n", info
->device_name
);
2651 release_resources(info
);
2657 static void release_resources(MGSLPC_INFO
*info
)
2659 if (debug_level
>= DEBUG_LEVEL_INFO
)
2660 printk("release_resources(%s)\n", info
->device_name
);
2661 rx_free_buffers(info
);
2664 /* Add the specified device instance data structure to the
2665 * global linked list of devices and increment the device count.
2667 * Arguments: info pointer to device instance data
2669 static int mgslpc_add_device(MGSLPC_INFO
*info
)
2671 MGSLPC_INFO
*current_dev
= NULL
;
2672 struct device
*tty_dev
;
2675 info
->next_device
= NULL
;
2676 info
->line
= mgslpc_device_count
;
2677 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2679 if (info
->line
< MAX_DEVICE_COUNT
) {
2680 if (maxframe
[info
->line
])
2681 info
->max_frame_size
= maxframe
[info
->line
];
2684 mgslpc_device_count
++;
2686 if (!mgslpc_device_list
)
2687 mgslpc_device_list
= info
;
2689 current_dev
= mgslpc_device_list
;
2690 while (current_dev
->next_device
)
2691 current_dev
= current_dev
->next_device
;
2692 current_dev
->next_device
= info
;
2695 if (info
->max_frame_size
< 4096)
2696 info
->max_frame_size
= 4096;
2697 else if (info
->max_frame_size
> 65535)
2698 info
->max_frame_size
= 65535;
2700 printk("SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2701 info
->device_name
, info
->io_base
, info
->irq_level
);
2703 #if SYNCLINK_GENERIC_HDLC
2704 ret
= hdlcdev_init(info
);
2709 tty_dev
= tty_port_register_device(&info
->port
, serial_driver
, info
->line
,
2711 if (IS_ERR(tty_dev
)) {
2712 ret
= PTR_ERR(tty_dev
);
2713 #if SYNCLINK_GENERIC_HDLC
2723 current_dev
->next_device
= NULL
;
2725 mgslpc_device_list
= NULL
;
2726 mgslpc_device_count
--;
2730 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2732 MGSLPC_INFO
*info
= mgslpc_device_list
;
2733 MGSLPC_INFO
*last
= NULL
;
2736 if (info
== remove_info
) {
2738 last
->next_device
= info
->next_device
;
2740 mgslpc_device_list
= info
->next_device
;
2741 tty_unregister_device(serial_driver
, info
->line
);
2742 #if SYNCLINK_GENERIC_HDLC
2745 release_resources(info
);
2746 tty_port_destroy(&info
->port
);
2748 mgslpc_device_count
--;
2752 info
= info
->next_device
;
2756 static const struct pcmcia_device_id mgslpc_ids
[] = {
2757 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2760 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2762 static struct pcmcia_driver mgslpc_driver
= {
2763 .owner
= THIS_MODULE
,
2764 .name
= "synclink_cs",
2765 .probe
= mgslpc_probe
,
2766 .remove
= mgslpc_detach
,
2767 .id_table
= mgslpc_ids
,
2768 .suspend
= mgslpc_suspend
,
2769 .resume
= mgslpc_resume
,
2772 static const struct tty_operations mgslpc_ops
= {
2773 .open
= mgslpc_open
,
2774 .close
= mgslpc_close
,
2775 .write
= mgslpc_write
,
2776 .put_char
= mgslpc_put_char
,
2777 .flush_chars
= mgslpc_flush_chars
,
2778 .write_room
= mgslpc_write_room
,
2779 .chars_in_buffer
= mgslpc_chars_in_buffer
,
2780 .flush_buffer
= mgslpc_flush_buffer
,
2781 .ioctl
= mgslpc_ioctl
,
2782 .throttle
= mgslpc_throttle
,
2783 .unthrottle
= mgslpc_unthrottle
,
2784 .send_xchar
= mgslpc_send_xchar
,
2785 .break_ctl
= mgslpc_break
,
2786 .wait_until_sent
= mgslpc_wait_until_sent
,
2787 .set_termios
= mgslpc_set_termios
,
2789 .start
= tx_release
,
2790 .hangup
= mgslpc_hangup
,
2791 .tiocmget
= tiocmget
,
2792 .tiocmset
= tiocmset
,
2793 .get_icount
= mgslpc_get_icount
,
2794 .proc_show
= mgslpc_proc_show
,
2797 static int __init
synclink_cs_init(void)
2801 if (break_on_load
) {
2802 mgslpc_get_text_ptr();
2806 serial_driver
= tty_alloc_driver(MAX_DEVICE_COUNT
,
2807 TTY_DRIVER_REAL_RAW
|
2808 TTY_DRIVER_DYNAMIC_DEV
);
2809 if (IS_ERR(serial_driver
)) {
2810 rc
= PTR_ERR(serial_driver
);
2814 /* Initialize the tty_driver structure */
2815 serial_driver
->driver_name
= "synclink_cs";
2816 serial_driver
->name
= "ttySLP";
2817 serial_driver
->major
= ttymajor
;
2818 serial_driver
->minor_start
= 64;
2819 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2820 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
2821 serial_driver
->init_termios
= tty_std_termios
;
2822 serial_driver
->init_termios
.c_cflag
=
2823 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
2824 tty_set_operations(serial_driver
, &mgslpc_ops
);
2826 rc
= tty_register_driver(serial_driver
);
2828 printk(KERN_ERR
"%s(%d):Couldn't register serial driver\n",
2829 __FILE__
, __LINE__
);
2833 rc
= pcmcia_register_driver(&mgslpc_driver
);
2837 printk(KERN_INFO
"%s %s, tty major#%d\n", driver_name
, driver_version
,
2838 serial_driver
->major
);
2842 tty_unregister_driver(serial_driver
);
2844 put_tty_driver(serial_driver
);
2849 static void __exit
synclink_cs_exit(void)
2851 pcmcia_unregister_driver(&mgslpc_driver
);
2852 tty_unregister_driver(serial_driver
);
2853 put_tty_driver(serial_driver
);
2856 module_init(synclink_cs_init
);
2857 module_exit(synclink_cs_exit
);
2859 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
2864 /* note:standard BRG mode is broken in V3.2 chip
2865 * so enhanced mode is always used
2873 for (M
= 1; N
> 64 && M
< 16; M
++)
2879 * BGR[7..0] contained in BGR register
2880 * BGR[9..8] contained in CCR2[7..6]
2881 * divisor = (N+1)*2^M
2883 * Note: M *must* not be zero (causes asymetric duty cycle)
2885 write_reg(info
, (unsigned char) (channel
+ BGR
),
2886 (unsigned char) ((M
<< 6) + N
));
2887 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
2888 val
|= ((M
<< 4) & 0xc0);
2889 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
2893 /* Enabled the AUX clock output at the specified frequency.
2895 static void enable_auxclk(MGSLPC_INFO
*info
)
2901 * 07..06 MDS[1..0] 10 = transparent HDLC mode
2902 * 05 ADM Address Mode, 0 = no addr recognition
2903 * 04 TMD Timer Mode, 0 = external
2904 * 03 RAC Receiver Active, 0 = inactive
2905 * 02 RTS 0=RTS active during xmit, 1=RTS always active
2906 * 01 TRS Timer Resolution, 1=512
2907 * 00 TLP Test Loop, 0 = no loop
2913 /* channel B RTS is used to enable AUXCLK driver on SP505 */
2914 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
2916 write_reg(info
, CHB
+ MODE
, val
);
2920 * 07 PU Power Up, 1=active, 0=power down
2921 * 06 MCE Master Clock Enable, 1=enabled
2923 * 04..02 SC[2..0] Encoding
2924 * 01..00 SM[1..0] Serial Mode, 00=HDLC
2928 write_reg(info
, CHB
+ CCR0
, 0xc0);
2932 * 07 SFLG Shared Flag, 0 = disable shared flags
2933 * 06 GALP Go Active On Loop, 0 = not used
2934 * 05 GLP Go On Loop, 0 = not used
2935 * 04 ODS Output Driver Select, 1=TxD is push-pull output
2936 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
2937 * 02..00 CM[2..0] Clock Mode
2941 write_reg(info
, CHB
+ CCR1
, 0x17);
2945 * 07..06 BGR[9..8] Baud rate bits 9..8
2946 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
2947 * 04 SSEL Clock source select, 1=submode b
2948 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
2949 * 02 RWX Read/Write Exchange 0=disabled
2950 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
2951 * 00 DIV, data inversion 0=disabled, 1=enabled
2955 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
2956 write_reg(info
, CHB
+ CCR2
, 0x38);
2958 write_reg(info
, CHB
+ CCR2
, 0x30);
2962 * 07 MCK4 Master Clock Divide by 4, 1=enabled
2963 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
2964 * 05 TST1 Test Pin, 0=normal operation
2965 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
2966 * 03..02 Reserved, must be 0
2967 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
2971 write_reg(info
, CHB
+ CCR4
, 0x50);
2973 /* if auxclk not enabled, set internal BRG so
2974 * CTS transitions can be detected (requires TxC)
2976 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
2977 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
2979 mgslpc_set_rate(info
, CHB
, 921600);
2982 static void loopback_enable(MGSLPC_INFO
*info
)
2986 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
2987 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
| BIT1
| BIT0
);
2988 write_reg(info
, CHA
+ CCR1
, val
);
2990 /* CCR2:04 SSEL Clock source select, 1=submode b */
2991 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
| BIT5
);
2992 write_reg(info
, CHA
+ CCR2
, val
);
2994 /* set LinkSpeed if available, otherwise default to 2Mbps */
2995 if (info
->params
.clock_speed
)
2996 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
2998 mgslpc_set_rate(info
, CHA
, 1843200);
3000 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3001 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3002 write_reg(info
, CHA
+ MODE
, val
);
3005 static void hdlc_mode(MGSLPC_INFO
*info
)
3008 unsigned char clkmode
, clksubmode
;
3010 /* disable all interrupts */
3011 irq_disable(info
, CHA
, 0xffff);
3012 irq_disable(info
, CHB
, 0xffff);
3013 port_irq_disable(info
, 0xff);
3015 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3016 clkmode
= clksubmode
= 0;
3017 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3018 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3019 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3021 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3022 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3023 /* clock mode 7b, rcv = BRG, xmt = BRG */
3026 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3027 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3028 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3032 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3035 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3036 /* clock mode 0b, rcv = RxC, xmt = BRG */
3042 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3043 * 05 ADM Address Mode, 0 = no addr recognition
3044 * 04 TMD Timer Mode, 0 = external
3045 * 03 RAC Receiver Active, 0 = inactive
3046 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3047 * 01 TRS Timer Resolution, 1=512
3048 * 00 TLP Test Loop, 0 = no loop
3053 if (info
->params
.loopback
)
3056 /* preserve RTS state */
3057 if (info
->serial_signals
& SerialSignal_RTS
)
3059 write_reg(info
, CHA
+ MODE
, val
);
3063 * 07 PU Power Up, 1=active, 0=power down
3064 * 06 MCE Master Clock Enable, 1=enabled
3066 * 04..02 SC[2..0] Encoding
3067 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3072 switch (info
->params
.encoding
)
3074 case HDLC_ENCODING_NRZI
:
3077 case HDLC_ENCODING_BIPHASE_SPACE
:
3080 case HDLC_ENCODING_BIPHASE_MARK
:
3083 case HDLC_ENCODING_BIPHASE_LEVEL
:
3085 break; // Manchester
3087 write_reg(info
, CHA
+ CCR0
, val
);
3091 * 07 SFLG Shared Flag, 0 = disable shared flags
3092 * 06 GALP Go Active On Loop, 0 = not used
3093 * 05 GLP Go On Loop, 0 = not used
3094 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3095 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3096 * 02..00 CM[2..0] Clock Mode
3100 val
= 0x10 + clkmode
;
3101 write_reg(info
, CHA
+ CCR1
, val
);
3105 * 07..06 BGR[9..8] Baud rate bits 9..8
3106 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3107 * 04 SSEL Clock source select, 1=submode b
3108 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3109 * 02 RWX Read/Write Exchange 0=disabled
3110 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3111 * 00 DIV, data inversion 0=disabled, 1=enabled
3116 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3117 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3121 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3123 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3125 write_reg(info
, CHA
+ CCR2
, val
);
3129 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3130 * 05 EPT Enable preamble transmission, 1=enabled
3131 * 04 RADD Receive address pushed to FIFO, 0=disabled
3132 * 03 CRL CRC Reset Level, 0=FFFF
3133 * 02 RCRC Rx CRC 0=On 1=Off
3134 * 01 TCRC Tx CRC 0=On 1=Off
3135 * 00 PSD DPLL Phase Shift Disable
3140 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3142 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3144 switch (info
->params
.preamble_length
)
3146 case HDLC_PREAMBLE_LENGTH_16BITS
:
3149 case HDLC_PREAMBLE_LENGTH_32BITS
:
3152 case HDLC_PREAMBLE_LENGTH_64BITS
:
3156 write_reg(info
, CHA
+ CCR3
, val
);
3158 /* PRE - Preamble pattern */
3160 switch (info
->params
.preamble
)
3162 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3163 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3164 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3165 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3167 write_reg(info
, CHA
+ PRE
, val
);
3171 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3172 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3173 * 05 TST1 Test Pin, 0=normal operation
3174 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3175 * 03..02 Reserved, must be 0
3176 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3181 write_reg(info
, CHA
+ CCR4
, val
);
3182 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3183 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3185 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3187 /* RLCR Receive length check register
3189 * 7 1=enable receive length check
3190 * 6..0 Max frame length = (RL + 1) * 32
3192 write_reg(info
, CHA
+ RLCR
, 0);
3194 /* XBCH Transmit Byte Count High
3196 * 07 DMA mode, 0 = interrupt driven
3197 * 06 NRM, 0=ABM (ignored)
3198 * 05 CAS Carrier Auto Start
3199 * 04 XC Transmit Continuously (ignored)
3200 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3205 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3207 write_reg(info
, CHA
+ XBCH
, val
);
3208 enable_auxclk(info
);
3209 if (info
->params
.loopback
|| info
->testing_irq
)
3210 loopback_enable(info
);
3211 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3213 irq_enable(info
, CHB
, IRQ_CTS
);
3214 /* PVR[3] 1=AUTO CTS active */
3215 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3217 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3219 irq_enable(info
, CHA
,
3220 IRQ_RXEOM
| IRQ_RXFIFO
| IRQ_ALLSENT
|
3221 IRQ_UNDERRUN
| IRQ_TXFIFO
);
3222 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3223 wait_command_complete(info
, CHA
);
3224 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3226 /* Master clock mode enabled above to allow reset commands
3227 * to complete even if no data clocks are present.
3229 * Disable master clock mode for normal communications because
3230 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3231 * IRQ when in master clock mode.
3233 * Leave master clock mode enabled for IRQ test because the
3234 * timer IRQ used by the test can only happen in master clock mode.
3236 if (!info
->testing_irq
)
3237 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3245 static void rx_stop(MGSLPC_INFO
*info
)
3247 if (debug_level
>= DEBUG_LEVEL_ISR
)
3248 printk("%s(%d):rx_stop(%s)\n",
3249 __FILE__
, __LINE__
, info
->device_name
);
3251 /* MODE:03 RAC Receiver Active, 0=inactive */
3252 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3254 info
->rx_enabled
= false;
3255 info
->rx_overflow
= false;
3258 static void rx_start(MGSLPC_INFO
*info
)
3260 if (debug_level
>= DEBUG_LEVEL_ISR
)
3261 printk("%s(%d):rx_start(%s)\n",
3262 __FILE__
, __LINE__
, info
->device_name
);
3264 rx_reset_buffers(info
);
3265 info
->rx_enabled
= false;
3266 info
->rx_overflow
= false;
3268 /* MODE:03 RAC Receiver Active, 1=active */
3269 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3271 info
->rx_enabled
= true;
3274 static void tx_start(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
3276 if (debug_level
>= DEBUG_LEVEL_ISR
)
3277 printk("%s(%d):tx_start(%s)\n",
3278 __FILE__
, __LINE__
, info
->device_name
);
3280 if (info
->tx_count
) {
3281 /* If auto RTS enabled and RTS is inactive, then assert */
3282 /* RTS and set a flag indicating that the driver should */
3283 /* negate RTS when the transmission completes. */
3284 info
->drop_rts_on_tx_done
= false;
3286 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3288 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3289 info
->serial_signals
|= SerialSignal_RTS
;
3291 info
->drop_rts_on_tx_done
= true;
3295 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3296 if (!info
->tx_active
) {
3297 info
->tx_active
= true;
3298 tx_ready(info
, tty
);
3301 info
->tx_active
= true;
3302 tx_ready(info
, tty
);
3303 mod_timer(&info
->tx_timer
, jiffies
+
3304 msecs_to_jiffies(5000));
3308 if (!info
->tx_enabled
)
3309 info
->tx_enabled
= true;
3312 static void tx_stop(MGSLPC_INFO
*info
)
3314 if (debug_level
>= DEBUG_LEVEL_ISR
)
3315 printk("%s(%d):tx_stop(%s)\n",
3316 __FILE__
, __LINE__
, info
->device_name
);
3318 del_timer(&info
->tx_timer
);
3320 info
->tx_enabled
= false;
3321 info
->tx_active
= false;
3324 /* Reset the adapter to a known state and prepare it for further use.
3326 static void reset_device(MGSLPC_INFO
*info
)
3328 /* power up both channels (set BIT7) */
3329 write_reg(info
, CHA
+ CCR0
, 0x80);
3330 write_reg(info
, CHB
+ CCR0
, 0x80);
3331 write_reg(info
, CHA
+ MODE
, 0);
3332 write_reg(info
, CHB
+ MODE
, 0);
3334 /* disable all interrupts */
3335 irq_disable(info
, CHA
, 0xffff);
3336 irq_disable(info
, CHB
, 0xffff);
3337 port_irq_disable(info
, 0xff);
3339 /* PCR Port Configuration Register
3341 * 07..04 DEC[3..0] Serial I/F select outputs
3342 * 03 output, 1=AUTO CTS control enabled
3343 * 02 RI Ring Indicator input 0=active
3344 * 01 DSR input 0=active
3345 * 00 DTR output 0=active
3349 write_reg(info
, PCR
, 0x06);
3351 /* PVR Port Value Register
3353 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3354 * 03 AUTO CTS output 1=enabled
3355 * 02 RI Ring Indicator input
3357 * 00 DTR output (1=inactive)
3361 // write_reg(info, PVR, PVR_DTR);
3363 /* IPC Interrupt Port Configuration
3365 * 07 VIS 1=Masked interrupts visible
3366 * 06..05 Reserved, 0
3367 * 04..03 SLA Slave address, 00 ignored
3368 * 02 CASM Cascading Mode, 1=daisy chain
3369 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3373 write_reg(info
, IPC
, 0x05);
3376 static void async_mode(MGSLPC_INFO
*info
)
3380 /* disable all interrupts */
3381 irq_disable(info
, CHA
, 0xffff);
3382 irq_disable(info
, CHB
, 0xffff);
3383 port_irq_disable(info
, 0xff);
3388 * 06 FRTS RTS State, 0=active
3389 * 05 FCTS Flow Control on CTS
3390 * 04 FLON Flow Control Enable
3391 * 03 RAC Receiver Active, 0 = inactive
3392 * 02 RTS 0=Auto RTS, 1=manual RTS
3393 * 01 TRS Timer Resolution, 1=512
3394 * 00 TLP Test Loop, 0 = no loop
3399 if (info
->params
.loopback
)
3402 /* preserve RTS state */
3403 if (!(info
->serial_signals
& SerialSignal_RTS
))
3405 write_reg(info
, CHA
+ MODE
, val
);
3409 * 07 PU Power Up, 1=active, 0=power down
3410 * 06 MCE Master Clock Enable, 1=enabled
3412 * 04..02 SC[2..0] Encoding, 000=NRZ
3413 * 01..00 SM[1..0] Serial Mode, 11=Async
3417 write_reg(info
, CHA
+ CCR0
, 0x83);
3421 * 07..05 Reserved, 0
3422 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3423 * 03 BCR Bit Clock Rate, 1=16x
3424 * 02..00 CM[2..0] Clock Mode, 111=BRG
3428 write_reg(info
, CHA
+ CCR1
, 0x1f);
3432 * 07..06 BGR[9..8] Baud rate bits 9..8
3433 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3434 * 04 SSEL Clock source select, 1=submode b
3435 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3436 * 02 RWX Read/Write Exchange 0=disabled
3438 * 00 DIV, data inversion 0=disabled, 1=enabled
3442 write_reg(info
, CHA
+ CCR2
, 0x10);
3446 * 07..01 Reserved, 0
3447 * 00 PSD DPLL Phase Shift Disable
3451 write_reg(info
, CHA
+ CCR3
, 0);
3455 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3456 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3457 * 05 TST1 Test Pin, 0=normal operation
3458 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3459 * 03..00 Reserved, must be 0
3463 write_reg(info
, CHA
+ CCR4
, 0x50);
3464 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3469 * 06 XBRK transmit break, 0=normal operation
3470 * 05 Stop bits (0=1, 1=2)
3471 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3472 * 02 PAREN Parity Enable
3473 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3477 if (info
->params
.data_bits
!= 8)
3478 val
|= BIT0
; /* 7 bits */
3479 if (info
->params
.stop_bits
!= 1)
3481 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3483 val
|= BIT2
; /* Parity enable */
3484 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3489 write_reg(info
, CHA
+ DAFO
, val
);
3491 /* RFC Rx FIFO Control
3494 * 06 DPS, 1=parity bit not stored in data byte
3495 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3496 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3497 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3499 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3503 write_reg(info
, CHA
+ RFC
, 0x5c);
3505 /* RLCR Receive length check register
3507 * Max frame length = (RL + 1) * 32
3509 write_reg(info
, CHA
+ RLCR
, 0);
3511 /* XBCH Transmit Byte Count High
3513 * 07 DMA mode, 0 = interrupt driven
3514 * 06 NRM, 0=ABM (ignored)
3515 * 05 CAS Carrier Auto Start
3516 * 04 XC Transmit Continuously (ignored)
3517 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3522 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3524 write_reg(info
, CHA
+ XBCH
, val
);
3525 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3526 irq_enable(info
, CHA
, IRQ_CTS
);
3528 /* MODE:03 RAC Receiver Active, 1=active */
3529 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3530 enable_auxclk(info
);
3531 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3532 irq_enable(info
, CHB
, IRQ_CTS
);
3533 /* PVR[3] 1=AUTO CTS active */
3534 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3536 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3537 irq_enable(info
, CHA
,
3538 IRQ_RXEOM
| IRQ_RXFIFO
| IRQ_BREAK_ON
| IRQ_RXTIME
|
3539 IRQ_ALLSENT
| IRQ_TXFIFO
);
3540 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3541 wait_command_complete(info
, CHA
);
3542 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3545 /* Set the HDLC idle mode for the transmitter.
3547 static void tx_set_idle(MGSLPC_INFO
*info
)
3549 /* Note: ESCC2 only supports flags and one idle modes */
3550 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3551 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3553 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3556 /* get state of the V24 status (input) signals.
3558 static void get_signals(MGSLPC_INFO
*info
)
3560 unsigned char status
= 0;
3562 /* preserve RTS and DTR */
3563 info
->serial_signals
&= SerialSignal_RTS
| SerialSignal_DTR
;
3565 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3566 info
->serial_signals
|= SerialSignal_DCD
;
3567 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3568 info
->serial_signals
|= SerialSignal_CTS
;
3570 status
= read_reg(info
, CHA
+ PVR
);
3571 if (!(status
& PVR_RI
))
3572 info
->serial_signals
|= SerialSignal_RI
;
3573 if (!(status
& PVR_DSR
))
3574 info
->serial_signals
|= SerialSignal_DSR
;
3577 /* Set the state of RTS and DTR based on contents of
3578 * serial_signals member of device extension.
3580 static void set_signals(MGSLPC_INFO
*info
)
3584 val
= read_reg(info
, CHA
+ MODE
);
3585 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3586 if (info
->serial_signals
& SerialSignal_RTS
)
3591 if (info
->serial_signals
& SerialSignal_RTS
)
3596 write_reg(info
, CHA
+ MODE
, val
);
3598 if (info
->serial_signals
& SerialSignal_DTR
)
3599 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3601 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3604 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3611 info
->rx_frame_count
= 0;
3612 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3613 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3614 buf
->status
= buf
->count
= 0;
3618 /* Attempt to return a received HDLC frame
3619 * Only frames received without errors are returned.
3621 * Returns true if frame returned, otherwise false
3623 static bool rx_get_frame(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
3625 unsigned short status
;
3627 unsigned int framesize
= 0;
3628 unsigned long flags
;
3629 bool return_frame
= false;
3631 if (info
->rx_frame_count
== 0)
3634 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3636 status
= buf
->status
;
3638 /* 07 VFR 1=valid frame
3639 * 06 RDO 1=data overrun
3640 * 05 CRC 1=OK, 0=error
3641 * 04 RAB 1=frame aborted
3643 if ((status
& 0xf0) != 0xA0) {
3644 if (!(status
& BIT7
) || (status
& BIT4
))
3645 info
->icount
.rxabort
++;
3646 else if (status
& BIT6
)
3647 info
->icount
.rxover
++;
3648 else if (!(status
& BIT5
)) {
3649 info
->icount
.rxcrc
++;
3650 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3651 return_frame
= true;
3654 #if SYNCLINK_GENERIC_HDLC
3656 info
->netdev
->stats
.rx_errors
++;
3657 info
->netdev
->stats
.rx_frame_errors
++;
3661 return_frame
= true;
3664 framesize
= buf
->count
;
3666 if (debug_level
>= DEBUG_LEVEL_BH
)
3667 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3668 __FILE__
, __LINE__
, info
->device_name
, status
, framesize
);
3670 if (debug_level
>= DEBUG_LEVEL_DATA
)
3671 trace_block(info
, buf
->data
, framesize
, 0);
3674 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3675 framesize
+1 > info
->max_frame_size
) ||
3676 framesize
> info
->max_frame_size
)
3677 info
->icount
.rxlong
++;
3680 info
->icount
.rxok
++;
3682 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3683 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3687 #if SYNCLINK_GENERIC_HDLC
3689 hdlcdev_rx(info
, buf
->data
, framesize
);
3692 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3696 spin_lock_irqsave(&info
->lock
, flags
);
3697 buf
->status
= buf
->count
= 0;
3698 info
->rx_frame_count
--;
3700 if (info
->rx_get
>= info
->rx_buf_count
)
3702 spin_unlock_irqrestore(&info
->lock
, flags
);
3707 static bool register_test(MGSLPC_INFO
*info
)
3709 static unsigned char patterns
[] =
3710 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3711 static unsigned int count
= ARRAY_SIZE(patterns
);
3714 unsigned long flags
;
3716 spin_lock_irqsave(&info
->lock
, flags
);
3719 for (i
= 0; i
< count
; i
++) {
3720 write_reg(info
, XAD1
, patterns
[i
]);
3721 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3722 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3723 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3729 spin_unlock_irqrestore(&info
->lock
, flags
);
3733 static bool irq_test(MGSLPC_INFO
*info
)
3735 unsigned long end_time
;
3736 unsigned long flags
;
3738 spin_lock_irqsave(&info
->lock
, flags
);
3741 info
->testing_irq
= true;
3744 info
->irq_occurred
= false;
3746 /* init hdlc mode */
3748 irq_enable(info
, CHA
, IRQ_TIMER
);
3749 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
3750 issue_command(info
, CHA
, CMD_START_TIMER
);
3752 spin_unlock_irqrestore(&info
->lock
, flags
);
3755 while(end_time
-- && !info
->irq_occurred
) {
3756 msleep_interruptible(10);
3759 info
->testing_irq
= false;
3761 spin_lock_irqsave(&info
->lock
, flags
);
3763 spin_unlock_irqrestore(&info
->lock
, flags
);
3765 return info
->irq_occurred
;
3768 static int adapter_test(MGSLPC_INFO
*info
)
3770 if (!register_test(info
)) {
3771 info
->init_error
= DiagStatus_AddressFailure
;
3772 printk("%s(%d):Register test failure for device %s Addr=%04X\n",
3773 __FILE__
, __LINE__
, info
->device_name
, (unsigned short)(info
->io_base
));
3777 if (!irq_test(info
)) {
3778 info
->init_error
= DiagStatus_IrqFailure
;
3779 printk("%s(%d):Interrupt test failure for device %s IRQ=%d\n",
3780 __FILE__
, __LINE__
, info
->device_name
, (unsigned short)(info
->irq_level
));
3784 if (debug_level
>= DEBUG_LEVEL_INFO
)
3785 printk("%s(%d):device %s passed diagnostics\n",
3786 __FILE__
, __LINE__
, info
->device_name
);
3790 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
3795 printk("%s tx data:\n", info
->device_name
);
3797 printk("%s rx data:\n", info
->device_name
);
3805 for(i
=0;i
<linecount
;i
++)
3806 printk("%02X ", (unsigned char)data
[i
]);
3809 for(i
=0;i
<linecount
;i
++) {
3810 if (data
[i
]>=040 && data
[i
]<=0176)
3811 printk("%c", data
[i
]);
3822 /* HDLC frame time out
3823 * update stats and do tx completion processing
3825 static void tx_timeout(struct timer_list
*t
)
3827 MGSLPC_INFO
*info
= from_timer(info
, t
, tx_timer
);
3828 unsigned long flags
;
3830 if (debug_level
>= DEBUG_LEVEL_INFO
)
3831 printk("%s(%d):tx_timeout(%s)\n",
3832 __FILE__
, __LINE__
, info
->device_name
);
3833 if (info
->tx_active
&&
3834 info
->params
.mode
== MGSL_MODE_HDLC
) {
3835 info
->icount
.txtimeout
++;
3837 spin_lock_irqsave(&info
->lock
, flags
);
3838 info
->tx_active
= false;
3839 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
3841 spin_unlock_irqrestore(&info
->lock
, flags
);
3843 #if SYNCLINK_GENERIC_HDLC
3845 hdlcdev_tx_done(info
);
3849 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
3850 bh_transmit(info
, tty
);
3855 #if SYNCLINK_GENERIC_HDLC
3858 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
3859 * set encoding and frame check sequence (FCS) options
3861 * dev pointer to network device structure
3862 * encoding serial encoding setting
3863 * parity FCS setting
3865 * returns 0 if success, otherwise error code
3867 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
3868 unsigned short parity
)
3870 MGSLPC_INFO
*info
= dev_to_port(dev
);
3871 struct tty_struct
*tty
;
3872 unsigned char new_encoding
;
3873 unsigned short new_crctype
;
3875 /* return error if TTY interface open */
3876 if (info
->port
.count
)
3881 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
3882 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
3883 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
3884 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
3885 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
3886 default: return -EINVAL
;
3891 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
3892 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
3893 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
3894 default: return -EINVAL
;
3897 info
->params
.encoding
= new_encoding
;
3898 info
->params
.crc_type
= new_crctype
;
3900 /* if network interface up, reprogram hardware */
3901 if (info
->netcount
) {
3902 tty
= tty_port_tty_get(&info
->port
);
3903 mgslpc_program_hw(info
, tty
);
3911 * called by generic HDLC layer to send frame
3913 * skb socket buffer containing HDLC frame
3914 * dev pointer to network device structure
3916 static netdev_tx_t
hdlcdev_xmit(struct sk_buff
*skb
,
3917 struct net_device
*dev
)
3919 MGSLPC_INFO
*info
= dev_to_port(dev
);
3920 unsigned long flags
;
3922 if (debug_level
>= DEBUG_LEVEL_INFO
)
3923 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n", __FILE__
, dev
->name
);
3925 /* stop sending until this frame completes */
3926 netif_stop_queue(dev
);
3928 /* copy data to device buffers */
3929 skb_copy_from_linear_data(skb
, info
->tx_buf
, skb
->len
);
3931 info
->tx_put
= info
->tx_count
= skb
->len
;
3933 /* update network statistics */
3934 dev
->stats
.tx_packets
++;
3935 dev
->stats
.tx_bytes
+= skb
->len
;
3937 /* done with socket buffer, so free it */
3940 /* save start time for transmit timeout detection */
3941 netif_trans_update(dev
);
3943 /* start hardware transmitter if necessary */
3944 spin_lock_irqsave(&info
->lock
, flags
);
3945 if (!info
->tx_active
) {
3946 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
3947 tx_start(info
, tty
);
3950 spin_unlock_irqrestore(&info
->lock
, flags
);
3952 return NETDEV_TX_OK
;
3956 * called by network layer when interface enabled
3957 * claim resources and initialize hardware
3959 * dev pointer to network device structure
3961 * returns 0 if success, otherwise error code
3963 static int hdlcdev_open(struct net_device
*dev
)
3965 MGSLPC_INFO
*info
= dev_to_port(dev
);
3966 struct tty_struct
*tty
;
3968 unsigned long flags
;
3970 if (debug_level
>= DEBUG_LEVEL_INFO
)
3971 printk("%s:hdlcdev_open(%s)\n", __FILE__
, dev
->name
);
3973 /* generic HDLC layer open processing */
3974 rc
= hdlc_open(dev
);
3978 /* arbitrate between network and tty opens */
3979 spin_lock_irqsave(&info
->netlock
, flags
);
3980 if (info
->port
.count
!= 0 || info
->netcount
!= 0) {
3981 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
3982 spin_unlock_irqrestore(&info
->netlock
, flags
);
3986 spin_unlock_irqrestore(&info
->netlock
, flags
);
3988 tty
= tty_port_tty_get(&info
->port
);
3989 /* claim resources and init adapter */
3990 rc
= startup(info
, tty
);
3993 spin_lock_irqsave(&info
->netlock
, flags
);
3995 spin_unlock_irqrestore(&info
->netlock
, flags
);
3998 /* assert RTS and DTR, apply hardware settings */
3999 info
->serial_signals
|= SerialSignal_RTS
| SerialSignal_DTR
;
4000 mgslpc_program_hw(info
, tty
);
4003 /* enable network layer transmit */
4004 netif_trans_update(dev
);
4005 netif_start_queue(dev
);
4007 /* inform generic HDLC layer of current DCD status */
4008 spin_lock_irqsave(&info
->lock
, flags
);
4010 spin_unlock_irqrestore(&info
->lock
, flags
);
4011 if (info
->serial_signals
& SerialSignal_DCD
)
4012 netif_carrier_on(dev
);
4014 netif_carrier_off(dev
);
4019 * called by network layer when interface is disabled
4020 * shutdown hardware and release resources
4022 * dev pointer to network device structure
4024 * returns 0 if success, otherwise error code
4026 static int hdlcdev_close(struct net_device
*dev
)
4028 MGSLPC_INFO
*info
= dev_to_port(dev
);
4029 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4030 unsigned long flags
;
4032 if (debug_level
>= DEBUG_LEVEL_INFO
)
4033 printk("%s:hdlcdev_close(%s)\n", __FILE__
, dev
->name
);
4035 netif_stop_queue(dev
);
4037 /* shutdown adapter and release resources */
4038 shutdown(info
, tty
);
4042 spin_lock_irqsave(&info
->netlock
, flags
);
4044 spin_unlock_irqrestore(&info
->netlock
, flags
);
4050 * called by network layer to process IOCTL call to network device
4052 * dev pointer to network device structure
4053 * ifr pointer to network interface request structure
4054 * cmd IOCTL command code
4056 * returns 0 if success, otherwise error code
4058 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4060 const size_t size
= sizeof(sync_serial_settings
);
4061 sync_serial_settings new_line
;
4062 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4063 MGSLPC_INFO
*info
= dev_to_port(dev
);
4066 if (debug_level
>= DEBUG_LEVEL_INFO
)
4067 printk("%s:hdlcdev_ioctl(%s)\n", __FILE__
, dev
->name
);
4069 /* return error if TTY interface open */
4070 if (info
->port
.count
)
4073 if (cmd
!= SIOCWANDEV
)
4074 return hdlc_ioctl(dev
, ifr
, cmd
);
4076 memset(&new_line
, 0, size
);
4078 switch(ifr
->ifr_settings
.type
) {
4079 case IF_GET_IFACE
: /* return current sync_serial_settings */
4081 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4082 if (ifr
->ifr_settings
.size
< size
) {
4083 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4087 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4088 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4089 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4090 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4093 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4094 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4095 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4096 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4097 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4100 new_line
.clock_rate
= info
->params
.clock_speed
;
4101 new_line
.loopback
= info
->params
.loopback
? 1:0;
4103 if (copy_to_user(line
, &new_line
, size
))
4107 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4109 if(!capable(CAP_NET_ADMIN
))
4111 if (copy_from_user(&new_line
, line
, size
))
4114 switch (new_line
.clock_type
)
4116 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4117 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4118 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4119 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4120 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4121 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4122 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4123 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4124 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4125 default: return -EINVAL
;
4128 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4131 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4132 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4133 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4134 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4135 info
->params
.flags
|= flags
;
4137 info
->params
.loopback
= new_line
.loopback
;
4139 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4140 info
->params
.clock_speed
= new_line
.clock_rate
;
4142 info
->params
.clock_speed
= 0;
4144 /* if network interface up, reprogram hardware */
4145 if (info
->netcount
) {
4146 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4147 mgslpc_program_hw(info
, tty
);
4153 return hdlc_ioctl(dev
, ifr
, cmd
);
4158 * called by network layer when transmit timeout is detected
4160 * dev pointer to network device structure
4162 static void hdlcdev_tx_timeout(struct net_device
*dev
, unsigned int txqueue
)
4164 MGSLPC_INFO
*info
= dev_to_port(dev
);
4165 unsigned long flags
;
4167 if (debug_level
>= DEBUG_LEVEL_INFO
)
4168 printk("hdlcdev_tx_timeout(%s)\n", dev
->name
);
4170 dev
->stats
.tx_errors
++;
4171 dev
->stats
.tx_aborted_errors
++;
4173 spin_lock_irqsave(&info
->lock
, flags
);
4175 spin_unlock_irqrestore(&info
->lock
, flags
);
4177 netif_wake_queue(dev
);
4181 * called by device driver when transmit completes
4182 * reenable network layer transmit if stopped
4184 * info pointer to device instance information
4186 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4188 if (netif_queue_stopped(info
->netdev
))
4189 netif_wake_queue(info
->netdev
);
4193 * called by device driver when frame received
4194 * pass frame to network layer
4196 * info pointer to device instance information
4197 * buf pointer to buffer contianing frame data
4198 * size count of data bytes in buf
4200 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4202 struct sk_buff
*skb
= dev_alloc_skb(size
);
4203 struct net_device
*dev
= info
->netdev
;
4205 if (debug_level
>= DEBUG_LEVEL_INFO
)
4206 printk("hdlcdev_rx(%s)\n", dev
->name
);
4209 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4210 dev
->stats
.rx_dropped
++;
4214 skb_put_data(skb
, buf
, size
);
4216 skb
->protocol
= hdlc_type_trans(skb
, dev
);
4218 dev
->stats
.rx_packets
++;
4219 dev
->stats
.rx_bytes
+= size
;
4224 static const struct net_device_ops hdlcdev_ops
= {
4225 .ndo_open
= hdlcdev_open
,
4226 .ndo_stop
= hdlcdev_close
,
4227 .ndo_start_xmit
= hdlc_start_xmit
,
4228 .ndo_do_ioctl
= hdlcdev_ioctl
,
4229 .ndo_tx_timeout
= hdlcdev_tx_timeout
,
4233 * called by device driver when adding device instance
4234 * do generic HDLC initialization
4236 * info pointer to device instance information
4238 * returns 0 if success, otherwise error code
4240 static int hdlcdev_init(MGSLPC_INFO
*info
)
4243 struct net_device
*dev
;
4246 /* allocate and initialize network and HDLC layer objects */
4248 dev
= alloc_hdlcdev(info
);
4250 printk(KERN_ERR
"%s:hdlc device allocation failure\n", __FILE__
);
4254 /* for network layer reporting purposes only */
4255 dev
->base_addr
= info
->io_base
;
4256 dev
->irq
= info
->irq_level
;
4258 /* network layer callbacks and settings */
4259 dev
->netdev_ops
= &hdlcdev_ops
;
4260 dev
->watchdog_timeo
= 10 * HZ
;
4261 dev
->tx_queue_len
= 50;
4263 /* generic HDLC layer callbacks and settings */
4264 hdlc
= dev_to_hdlc(dev
);
4265 hdlc
->attach
= hdlcdev_attach
;
4266 hdlc
->xmit
= hdlcdev_xmit
;
4268 /* register objects with HDLC layer */
4269 rc
= register_hdlc_device(dev
);
4271 printk(KERN_WARNING
"%s:unable to register hdlc device\n", __FILE__
);
4281 * called by device driver when removing device instance
4282 * do generic HDLC cleanup
4284 * info pointer to device instance information
4286 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4288 unregister_hdlc_device(info
->netdev
);
4289 free_netdev(info
->netdev
);
4290 info
->netdev
= NULL
;
4293 #endif /* CONFIG_HDLC */