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 info->port.close_delay = 5*HZ/10;
534 info->port.closing_wait = 30*HZ;
535 init_waitqueue_head(&info->status_event_wait_q);
536 init_waitqueue_head(&info->event_wait_q);
537 spin_lock_init(&info->lock);
538 spin_lock_init(&info->netlock);
539 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
540 info->idle_mode = HDLC_TXIDLE_FLAGS;
541 info->imra_value = 0xffff;
542 info->imrb_value = 0xffff;
543 info->pim_value = 0xff;
548 /* Initialize the struct pcmcia_device structure */
550 ret = mgslpc_config(link);
554 ret = mgslpc_add_device(info);
561 mgslpc_release((u_long)link);
563 tty_port_destroy(&info->port);
568 /* Card has been inserted.
571 static int mgslpc_ioprobe(struct pcmcia_device *p_dev, void *priv_data)
573 return pcmcia_request_io(p_dev);
576 static int mgslpc_config(struct pcmcia_device *link)
578 MGSLPC_INFO *info = link->priv;
581 if (debug_level >= DEBUG_LEVEL_INFO)
582 printk("mgslpc_config(0x%p)\n", link);
584 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
586 ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL);
590 link->config_index = 8;
591 link->config_regs = PRESENT_OPTION;
593 ret = pcmcia_request_irq(link, mgslpc_isr);
596 ret = pcmcia_enable_device(link);
600 info->io_base = link->resource[0]->start;
601 info->irq_level = link->irq;
605 mgslpc_release((u_long)link);
609 /* Card has been removed.
610 * Unregister device and release PCMCIA configuration.
611 * If device is open, postpone until it is closed.
613 static void mgslpc_release(u_long arg)
615 struct pcmcia_device *link = (struct pcmcia_device *)arg;
617 if (debug_level >= DEBUG_LEVEL_INFO)
618 printk("mgslpc_release(0x%p)\n", link);
620 pcmcia_disable_device(link);
623 static void mgslpc_detach(struct pcmcia_device *link)
625 if (debug_level >= DEBUG_LEVEL_INFO)
626 printk("mgslpc_detach(0x%p)\n", link);
628 ((MGSLPC_INFO *)link->priv)->stop = 1;
629 mgslpc_release((u_long)link);
631 mgslpc_remove_device((MGSLPC_INFO *)link->priv);
634 static int mgslpc_suspend(struct pcmcia_device *link)
636 MGSLPC_INFO *info = link->priv;
643 static int mgslpc_resume(struct pcmcia_device *link)
645 MGSLPC_INFO *info = link->priv;
653 static inline bool mgslpc_paranoia_check(MGSLPC_INFO *info,
654 char *name, const char *routine)
656 #ifdef MGSLPC_PARANOIA_CHECK
657 static const char *badmagic =
658 "Warning: bad magic number for mgsl struct (%s) in %s\n";
659 static const char *badinfo =
660 "Warning: null mgslpc_info for (%s) in %s\n";
663 printk(badinfo, name, routine);
666 if (info->magic != MGSLPC_MAGIC) {
667 printk(badmagic, name, routine);
678 #define CMD_RXFIFO BIT7 // release current rx FIFO
679 #define CMD_RXRESET BIT6 // receiver reset
680 #define CMD_RXFIFO_READ BIT5
681 #define CMD_START_TIMER BIT4
682 #define CMD_TXFIFO BIT3 // release current tx FIFO
683 #define CMD_TXEOM BIT1 // transmit end message
684 #define CMD_TXRESET BIT0 // transmit reset
686 static bool wait_command_complete(MGSLPC_INFO *info, unsigned char channel)
689 /* wait for command completion */
690 while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) {
698 static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd)
700 wait_command_complete(info, channel);
701 write_reg(info, (unsigned char) (channel + CMDR), cmd);
704 static void tx_pause(struct tty_struct *tty)
706 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
709 if (mgslpc_paranoia_check(info, tty->name, "tx_pause"))
711 if (debug_level >= DEBUG_LEVEL_INFO)
712 printk("tx_pause(%s)\n", info->device_name);
714 spin_lock_irqsave(&info->lock, flags);
715 if (info->tx_enabled)
717 spin_unlock_irqrestore(&info->lock, flags);
720 static void tx_release(struct tty_struct *tty)
722 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
725 if (mgslpc_paranoia_check(info, tty->name, "tx_release"))
727 if (debug_level >= DEBUG_LEVEL_INFO)
728 printk("tx_release(%s)\n", info->device_name);
730 spin_lock_irqsave(&info->lock, flags);
731 if (!info->tx_enabled)
733 spin_unlock_irqrestore(&info->lock, flags);
736 /* Return next bottom half action to perform.
737 * or 0 if nothing to do.
739 static int bh_action(MGSLPC_INFO *info)
744 spin_lock_irqsave(&info->lock, flags);
746 if (info->pending_bh & BH_RECEIVE) {
747 info->pending_bh &= ~BH_RECEIVE;
749 } else if (info->pending_bh & BH_TRANSMIT) {
750 info->pending_bh &= ~BH_TRANSMIT;
752 } else if (info->pending_bh & BH_STATUS) {
753 info->pending_bh &= ~BH_STATUS;
758 /* Mark BH routine as complete */
759 info->bh_running = false;
760 info->bh_requested = false;
763 spin_unlock_irqrestore(&info->lock, flags);
768 static void bh_handler(struct work_struct *work)
770 MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task);
771 struct tty_struct *tty;
774 if (debug_level >= DEBUG_LEVEL_BH)
775 printk("%s(%d):bh_handler(%s) entry\n",
776 __FILE__,__LINE__,info->device_name);
778 info->bh_running = true;
779 tty = tty_port_tty_get(&info->port);
781 while((action = bh_action(info)) != 0) {
783 /* Process work item */
784 if (debug_level >= DEBUG_LEVEL_BH)
785 printk("%s(%d):bh_handler() work item action=%d\n",
786 __FILE__,__LINE__,action);
791 while(rx_get_frame(info, tty));
794 bh_transmit(info, tty);
800 /* unknown work item ID */
801 printk("Unknown work item ID=%08X!\n", action);
807 if (debug_level >= DEBUG_LEVEL_BH)
808 printk("%s(%d):bh_handler(%s) exit\n",
809 __FILE__,__LINE__,info->device_name);
812 static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty)
814 if (debug_level >= DEBUG_LEVEL_BH)
815 printk("bh_transmit() entry on %s\n", info->device_name);
821 static void bh_status(MGSLPC_INFO *info)
823 info->ri_chkcount = 0;
824 info->dsr_chkcount = 0;
825 info->dcd_chkcount = 0;
826 info->cts_chkcount = 0;
829 /* eom: non-zero = end of frame */
830 static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
832 unsigned char data[2];
833 unsigned char fifo_count, read_count, i;
834 RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size));
836 if (debug_level >= DEBUG_LEVEL_ISR)
837 printk("%s(%d):rx_ready_hdlc(eom=%d)\n", __FILE__, __LINE__, eom);
839 if (!info->rx_enabled)
842 if (info->rx_frame_count >= info->rx_buf_count) {
843 /* no more free buffers */
844 issue_command(info, CHA, CMD_RXRESET);
845 info->pending_bh |= BH_RECEIVE;
846 info->rx_overflow = true;
847 info->icount.buf_overrun++;
852 /* end of frame, get FIFO count from RBCL register */
853 fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
860 if (fifo_count == 1) {
862 data[0] = read_reg(info, CHA + RXFIFO);
865 *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO);
867 fifo_count -= read_count;
868 if (!fifo_count && eom)
869 buf->status = data[--read_count];
871 for (i = 0; i < read_count; i++) {
872 if (buf->count >= info->max_frame_size) {
873 /* frame too large, reset receiver and reset current buffer */
874 issue_command(info, CHA, CMD_RXRESET);
878 *(buf->data + buf->count) = data[i];
881 } while (fifo_count);
884 info->pending_bh |= BH_RECEIVE;
885 info->rx_frame_count++;
887 if (info->rx_put >= info->rx_buf_count)
890 issue_command(info, CHA, CMD_RXFIFO);
893 static void rx_ready_async(MGSLPC_INFO *info, int tcd)
895 struct tty_port *port = &info->port;
896 unsigned char data, status, flag;
899 struct mgsl_icount *icount = &info->icount;
902 /* early termination, get FIFO count from RBCL register */
903 fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
905 /* Zero fifo count could mean 0 or 32 bytes available.
906 * If BIT5 of STAR is set then at least 1 byte is available.
908 if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5))
913 tty_buffer_request_room(port, fifo_count);
914 /* Flush received async data to receive data buffer. */
916 data = read_reg(info, CHA + RXFIFO);
917 status = read_reg(info, CHA + RXFIFO);
923 // if no frameing/crc error then save data
925 // BIT6:framing error
927 if (status & (BIT7 + BIT6)) {
933 /* discard char if tty control flags say so */
934 if (status & info->ignore_status_mask)
937 status &= info->read_status_mask;
941 else if (status & BIT6)
944 work += tty_insert_flip_char(port, data, flag);
946 issue_command(info, CHA, CMD_RXFIFO);
948 if (debug_level >= DEBUG_LEVEL_ISR) {
949 printk("%s(%d):rx_ready_async",
951 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
952 __FILE__,__LINE__,icount->rx,icount->brk,
953 icount->parity,icount->frame,icount->overrun);
957 tty_flip_buffer_push(port);
961 static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty)
963 if (!info->tx_active)
966 info->tx_active = false;
967 info->tx_aborting = false;
969 if (info->params.mode == MGSL_MODE_ASYNC)
972 info->tx_count = info->tx_put = info->tx_get = 0;
973 del_timer(&info->tx_timer);
975 if (info->drop_rts_on_tx_done) {
977 if (info->serial_signals & SerialSignal_RTS) {
978 info->serial_signals &= ~SerialSignal_RTS;
981 info->drop_rts_on_tx_done = false;
984 #if SYNCLINK_GENERIC_HDLC
986 hdlcdev_tx_done(info);
990 if (tty && (tty->stopped || tty->hw_stopped)) {
994 info->pending_bh |= BH_TRANSMIT;
998 static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty)
1000 unsigned char fifo_count = 32;
1003 if (debug_level >= DEBUG_LEVEL_ISR)
1004 printk("%s(%d):tx_ready(%s)\n", __FILE__, __LINE__, info->device_name);
1006 if (info->params.mode == MGSL_MODE_HDLC) {
1007 if (!info->tx_active)
1010 if (tty && (tty->stopped || tty->hw_stopped)) {
1014 if (!info->tx_count)
1015 info->tx_active = false;
1018 if (!info->tx_count)
1021 while (info->tx_count && fifo_count) {
1022 c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get)));
1025 write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get));
1027 write_reg16(info, CHA + TXFIFO,
1028 *((unsigned short*)(info->tx_buf + info->tx_get)));
1030 info->tx_count -= c;
1031 info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1);
1035 if (info->params.mode == MGSL_MODE_ASYNC) {
1036 if (info->tx_count < WAKEUP_CHARS)
1037 info->pending_bh |= BH_TRANSMIT;
1038 issue_command(info, CHA, CMD_TXFIFO);
1041 issue_command(info, CHA, CMD_TXFIFO);
1043 issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM);
1047 static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty)
1050 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1051 irq_disable(info, CHB, IRQ_CTS);
1053 if (info->serial_signals & SerialSignal_CTS)
1054 info->input_signal_events.cts_up++;
1056 info->input_signal_events.cts_down++;
1057 wake_up_interruptible(&info->status_event_wait_q);
1058 wake_up_interruptible(&info->event_wait_q);
1060 if (tty && tty_port_cts_enabled(&info->port)) {
1061 if (tty->hw_stopped) {
1062 if (info->serial_signals & SerialSignal_CTS) {
1063 if (debug_level >= DEBUG_LEVEL_ISR)
1064 printk("CTS tx start...");
1065 tty->hw_stopped = 0;
1066 tx_start(info, tty);
1067 info->pending_bh |= BH_TRANSMIT;
1071 if (!(info->serial_signals & SerialSignal_CTS)) {
1072 if (debug_level >= DEBUG_LEVEL_ISR)
1073 printk("CTS tx stop...");
1074 tty->hw_stopped = 1;
1079 info->pending_bh |= BH_STATUS;
1082 static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty)
1085 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1086 irq_disable(info, CHB, IRQ_DCD);
1088 if (info->serial_signals & SerialSignal_DCD) {
1089 info->input_signal_events.dcd_up++;
1092 info->input_signal_events.dcd_down++;
1093 #if SYNCLINK_GENERIC_HDLC
1094 if (info->netcount) {
1095 if (info->serial_signals & SerialSignal_DCD)
1096 netif_carrier_on(info->netdev);
1098 netif_carrier_off(info->netdev);
1101 wake_up_interruptible(&info->status_event_wait_q);
1102 wake_up_interruptible(&info->event_wait_q);
1104 if (tty_port_check_carrier(&info->port)) {
1105 if (debug_level >= DEBUG_LEVEL_ISR)
1106 printk("%s CD now %s...", info->device_name,
1107 (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
1108 if (info->serial_signals & SerialSignal_DCD)
1109 wake_up_interruptible(&info->port.open_wait);
1111 if (debug_level >= DEBUG_LEVEL_ISR)
1112 printk("doing serial hangup...");
1117 info->pending_bh |= BH_STATUS;
1120 static void dsr_change(MGSLPC_INFO *info)
1123 if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1124 port_irq_disable(info, PVR_DSR);
1126 if (info->serial_signals & SerialSignal_DSR)
1127 info->input_signal_events.dsr_up++;
1129 info->input_signal_events.dsr_down++;
1130 wake_up_interruptible(&info->status_event_wait_q);
1131 wake_up_interruptible(&info->event_wait_q);
1132 info->pending_bh |= BH_STATUS;
1135 static void ri_change(MGSLPC_INFO *info)
1138 if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1139 port_irq_disable(info, PVR_RI);
1141 if (info->serial_signals & SerialSignal_RI)
1142 info->input_signal_events.ri_up++;
1144 info->input_signal_events.ri_down++;
1145 wake_up_interruptible(&info->status_event_wait_q);
1146 wake_up_interruptible(&info->event_wait_q);
1147 info->pending_bh |= BH_STATUS;
1150 /* Interrupt service routine entry point.
1154 * irq interrupt number that caused interrupt
1155 * dev_id device ID supplied during interrupt registration
1157 static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
1159 MGSLPC_INFO *info = dev_id;
1160 struct tty_struct *tty;
1162 unsigned char gis, pis;
1165 if (debug_level >= DEBUG_LEVEL_ISR)
1166 printk("mgslpc_isr(%d) entry.\n", info->irq_level);
1168 if (!(info->p_dev->_locked))
1171 tty = tty_port_tty_get(&info->port);
1173 spin_lock(&info->lock);
1175 while ((gis = read_reg(info, CHA + GIS))) {
1176 if (debug_level >= DEBUG_LEVEL_ISR)
1177 printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis);
1179 if ((gis & 0x70) || count > 1000) {
1180 printk("synclink_cs:hardware failed or ejected\n");
1185 if (gis & (BIT1 | BIT0)) {
1186 isr = read_reg16(info, CHB + ISR);
1188 dcd_change(info, tty);
1190 cts_change(info, tty);
1192 if (gis & (BIT3 | BIT2))
1194 isr = read_reg16(info, CHA + ISR);
1195 if (isr & IRQ_TIMER) {
1196 info->irq_occurred = true;
1197 irq_disable(info, CHA, IRQ_TIMER);
1201 if (isr & IRQ_EXITHUNT) {
1202 info->icount.exithunt++;
1203 wake_up_interruptible(&info->event_wait_q);
1205 if (isr & IRQ_BREAK_ON) {
1207 if (info->port.flags & ASYNC_SAK)
1210 if (isr & IRQ_RXTIME) {
1211 issue_command(info, CHA, CMD_RXFIFO_READ);
1213 if (isr & (IRQ_RXEOM | IRQ_RXFIFO)) {
1214 if (info->params.mode == MGSL_MODE_HDLC)
1215 rx_ready_hdlc(info, isr & IRQ_RXEOM);
1217 rx_ready_async(info, isr & IRQ_RXEOM);
1221 if (isr & IRQ_UNDERRUN) {
1222 if (info->tx_aborting)
1223 info->icount.txabort++;
1225 info->icount.txunder++;
1228 else if (isr & IRQ_ALLSENT) {
1229 info->icount.txok++;
1232 else if (isr & IRQ_TXFIFO)
1233 tx_ready(info, tty);
1236 pis = read_reg(info, CHA + PIS);
1244 /* Request bottom half processing if there's something
1245 * for it to do and the bh is not already running
1248 if (info->pending_bh && !info->bh_running && !info->bh_requested) {
1249 if (debug_level >= DEBUG_LEVEL_ISR)
1250 printk("%s(%d):%s queueing bh task.\n",
1251 __FILE__,__LINE__,info->device_name);
1252 schedule_work(&info->task);
1253 info->bh_requested = true;
1256 spin_unlock(&info->lock);
1259 if (debug_level >= DEBUG_LEVEL_ISR)
1260 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1261 __FILE__, __LINE__, info->irq_level);
1266 /* Initialize and start device.
1268 static int startup(MGSLPC_INFO * info, struct tty_struct *tty)
1272 if (debug_level >= DEBUG_LEVEL_INFO)
1273 printk("%s(%d):startup(%s)\n", __FILE__, __LINE__, info->device_name);
1275 if (tty_port_initialized(&info->port))
1278 if (!info->tx_buf) {
1279 /* allocate a page of memory for a transmit buffer */
1280 info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
1281 if (!info->tx_buf) {
1282 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
1283 __FILE__, __LINE__, info->device_name);
1288 info->pending_bh = 0;
1290 memset(&info->icount, 0, sizeof(info->icount));
1292 timer_setup(&info->tx_timer, tx_timeout, 0);
1294 /* Allocate and claim adapter resources */
1295 retval = claim_resources(info);
1297 /* perform existence check and diagnostics */
1299 retval = adapter_test(info);
1302 if (capable(CAP_SYS_ADMIN) && tty)
1303 set_bit(TTY_IO_ERROR, &tty->flags);
1304 release_resources(info);
1308 /* program hardware for current parameters */
1309 mgslpc_change_params(info, tty);
1312 clear_bit(TTY_IO_ERROR, &tty->flags);
1314 tty_port_set_initialized(&info->port, 1);
1319 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1321 static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
1323 unsigned long flags;
1325 if (!tty_port_initialized(&info->port))
1328 if (debug_level >= DEBUG_LEVEL_INFO)
1329 printk("%s(%d):mgslpc_shutdown(%s)\n",
1330 __FILE__, __LINE__, info->device_name);
1332 /* clear status wait queue because status changes */
1333 /* can't happen after shutting down the hardware */
1334 wake_up_interruptible(&info->status_event_wait_q);
1335 wake_up_interruptible(&info->event_wait_q);
1337 del_timer_sync(&info->tx_timer);
1340 free_page((unsigned long) info->tx_buf);
1341 info->tx_buf = NULL;
1344 spin_lock_irqsave(&info->lock, flags);
1349 /* TODO:disable interrupts instead of reset to preserve signal states */
1352 if (!tty || C_HUPCL(tty)) {
1353 info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
1357 spin_unlock_irqrestore(&info->lock, flags);
1359 release_resources(info);
1362 set_bit(TTY_IO_ERROR, &tty->flags);
1364 tty_port_set_initialized(&info->port, 0);
1367 static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty)
1369 unsigned long flags;
1371 spin_lock_irqsave(&info->lock, flags);
1375 info->tx_count = info->tx_put = info->tx_get = 0;
1377 if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
1384 info->dcd_chkcount = 0;
1385 info->cts_chkcount = 0;
1386 info->ri_chkcount = 0;
1387 info->dsr_chkcount = 0;
1389 irq_enable(info, CHB, IRQ_DCD | IRQ_CTS);
1390 port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
1393 if (info->netcount || (tty && C_CREAD(tty)))
1396 spin_unlock_irqrestore(&info->lock, flags);
1399 /* Reconfigure adapter based on new parameters
1401 static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
1409 if (debug_level >= DEBUG_LEVEL_INFO)
1410 printk("%s(%d):mgslpc_change_params(%s)\n",
1411 __FILE__, __LINE__, info->device_name);
1413 cflag = tty->termios.c_cflag;
1415 /* if B0 rate (hangup) specified then negate RTS and DTR */
1416 /* otherwise assert RTS and DTR */
1418 info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
1420 info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
1422 /* byte size and parity */
1424 switch (cflag & CSIZE) {
1425 case CS5: info->params.data_bits = 5; break;
1426 case CS6: info->params.data_bits = 6; break;
1427 case CS7: info->params.data_bits = 7; break;
1428 case CS8: info->params.data_bits = 8; break;
1429 default: info->params.data_bits = 7; break;
1433 info->params.stop_bits = 2;
1435 info->params.stop_bits = 1;
1437 info->params.parity = ASYNC_PARITY_NONE;
1438 if (cflag & PARENB) {
1440 info->params.parity = ASYNC_PARITY_ODD;
1442 info->params.parity = ASYNC_PARITY_EVEN;
1445 info->params.parity = ASYNC_PARITY_SPACE;
1449 /* calculate number of jiffies to transmit a full
1450 * FIFO (32 bytes) at specified data rate
1452 bits_per_char = info->params.data_bits +
1453 info->params.stop_bits + 1;
1455 /* if port data rate is set to 460800 or less then
1456 * allow tty settings to override, otherwise keep the
1457 * current data rate.
1459 if (info->params.data_rate <= 460800) {
1460 info->params.data_rate = tty_get_baud_rate(tty);
1463 if (info->params.data_rate) {
1464 info->timeout = (32*HZ*bits_per_char) /
1465 info->params.data_rate;
1467 info->timeout += HZ/50; /* Add .02 seconds of slop */
1469 tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
1470 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
1472 /* process tty input control flags */
1474 info->read_status_mask = 0;
1476 info->read_status_mask |= BIT7 | BIT6;
1478 info->ignore_status_mask |= BIT7 | BIT6;
1480 mgslpc_program_hw(info, tty);
1483 /* Add a character to the transmit buffer
1485 static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
1487 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1488 unsigned long flags;
1490 if (debug_level >= DEBUG_LEVEL_INFO) {
1491 printk("%s(%d):mgslpc_put_char(%d) on %s\n",
1492 __FILE__, __LINE__, ch, info->device_name);
1495 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char"))
1501 spin_lock_irqsave(&info->lock, flags);
1503 if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) {
1504 if (info->tx_count < TXBUFSIZE - 1) {
1505 info->tx_buf[info->tx_put++] = ch;
1506 info->tx_put &= TXBUFSIZE-1;
1511 spin_unlock_irqrestore(&info->lock, flags);
1515 /* Enable transmitter so remaining characters in the
1516 * transmit buffer are sent.
1518 static void mgslpc_flush_chars(struct tty_struct *tty)
1520 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1521 unsigned long flags;
1523 if (debug_level >= DEBUG_LEVEL_INFO)
1524 printk("%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1525 __FILE__, __LINE__, info->device_name, info->tx_count);
1527 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars"))
1530 if (info->tx_count <= 0 || tty->stopped ||
1531 tty->hw_stopped || !info->tx_buf)
1534 if (debug_level >= DEBUG_LEVEL_INFO)
1535 printk("%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1536 __FILE__, __LINE__, info->device_name);
1538 spin_lock_irqsave(&info->lock, flags);
1539 if (!info->tx_active)
1540 tx_start(info, tty);
1541 spin_unlock_irqrestore(&info->lock, flags);
1544 /* Send a block of data
1548 * tty pointer to tty information structure
1549 * buf pointer to buffer containing send data
1550 * count size of send data in bytes
1552 * Returns: number of characters written
1554 static int mgslpc_write(struct tty_struct * tty,
1555 const unsigned char *buf, int count)
1558 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1559 unsigned long flags;
1561 if (debug_level >= DEBUG_LEVEL_INFO)
1562 printk("%s(%d):mgslpc_write(%s) count=%d\n",
1563 __FILE__, __LINE__, info->device_name, count);
1565 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") ||
1569 if (info->params.mode == MGSL_MODE_HDLC) {
1570 if (count > TXBUFSIZE) {
1574 if (info->tx_active)
1576 else if (info->tx_count)
1582 min(TXBUFSIZE - info->tx_count - 1,
1583 TXBUFSIZE - info->tx_put));
1587 memcpy(info->tx_buf + info->tx_put, buf, c);
1589 spin_lock_irqsave(&info->lock, flags);
1590 info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1);
1591 info->tx_count += c;
1592 spin_unlock_irqrestore(&info->lock, flags);
1599 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
1600 spin_lock_irqsave(&info->lock, flags);
1601 if (!info->tx_active)
1602 tx_start(info, tty);
1603 spin_unlock_irqrestore(&info->lock, flags);
1606 if (debug_level >= DEBUG_LEVEL_INFO)
1607 printk("%s(%d):mgslpc_write(%s) returning=%d\n",
1608 __FILE__, __LINE__, info->device_name, ret);
1612 /* Return the count of free bytes in transmit buffer
1614 static int mgslpc_write_room(struct tty_struct *tty)
1616 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1619 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room"))
1622 if (info->params.mode == MGSL_MODE_HDLC) {
1623 /* HDLC (frame oriented) mode */
1624 if (info->tx_active)
1627 return HDLC_MAX_FRAME_SIZE;
1629 ret = TXBUFSIZE - info->tx_count - 1;
1634 if (debug_level >= DEBUG_LEVEL_INFO)
1635 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1636 __FILE__, __LINE__, info->device_name, ret);
1640 /* Return the count of bytes in transmit buffer
1642 static int mgslpc_chars_in_buffer(struct tty_struct *tty)
1644 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1647 if (debug_level >= DEBUG_LEVEL_INFO)
1648 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1649 __FILE__, __LINE__, info->device_name);
1651 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer"))
1654 if (info->params.mode == MGSL_MODE_HDLC)
1655 rc = info->tx_active ? info->max_frame_size : 0;
1657 rc = info->tx_count;
1659 if (debug_level >= DEBUG_LEVEL_INFO)
1660 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1661 __FILE__, __LINE__, info->device_name, rc);
1666 /* Discard all data in the send buffer
1668 static void mgslpc_flush_buffer(struct tty_struct *tty)
1670 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1671 unsigned long flags;
1673 if (debug_level >= DEBUG_LEVEL_INFO)
1674 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1675 __FILE__, __LINE__, info->device_name);
1677 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer"))
1680 spin_lock_irqsave(&info->lock, flags);
1681 info->tx_count = info->tx_put = info->tx_get = 0;
1682 del_timer(&info->tx_timer);
1683 spin_unlock_irqrestore(&info->lock, flags);
1685 wake_up_interruptible(&tty->write_wait);
1689 /* Send a high-priority XON/XOFF character
1691 static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
1693 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1694 unsigned long flags;
1696 if (debug_level >= DEBUG_LEVEL_INFO)
1697 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1698 __FILE__, __LINE__, info->device_name, ch);
1700 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar"))
1705 spin_lock_irqsave(&info->lock, flags);
1706 if (!info->tx_enabled)
1707 tx_start(info, tty);
1708 spin_unlock_irqrestore(&info->lock, flags);
1712 /* Signal remote device to throttle send data (our receive data)
1714 static void mgslpc_throttle(struct tty_struct * tty)
1716 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1717 unsigned long flags;
1719 if (debug_level >= DEBUG_LEVEL_INFO)
1720 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1721 __FILE__, __LINE__, info->device_name);
1723 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle"))
1727 mgslpc_send_xchar(tty, STOP_CHAR(tty));
1729 if (C_CRTSCTS(tty)) {
1730 spin_lock_irqsave(&info->lock, flags);
1731 info->serial_signals &= ~SerialSignal_RTS;
1733 spin_unlock_irqrestore(&info->lock, flags);
1737 /* Signal remote device to stop throttling send data (our receive data)
1739 static void mgslpc_unthrottle(struct tty_struct * tty)
1741 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1742 unsigned long flags;
1744 if (debug_level >= DEBUG_LEVEL_INFO)
1745 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1746 __FILE__, __LINE__, info->device_name);
1748 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle"))
1755 mgslpc_send_xchar(tty, START_CHAR(tty));
1758 if (C_CRTSCTS(tty)) {
1759 spin_lock_irqsave(&info->lock, flags);
1760 info->serial_signals |= SerialSignal_RTS;
1762 spin_unlock_irqrestore(&info->lock, flags);
1766 /* get the current serial statistics
1768 static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount)
1771 if (debug_level >= DEBUG_LEVEL_INFO)
1772 printk("get_params(%s)\n", info->device_name);
1774 memset(&info->icount, 0, sizeof(info->icount));
1776 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
1783 /* get the current serial parameters
1785 static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
1788 if (debug_level >= DEBUG_LEVEL_INFO)
1789 printk("get_params(%s)\n", info->device_name);
1790 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
1796 /* set the serial parameters
1800 * info pointer to device instance data
1801 * new_params user buffer containing new serial params
1803 * Returns: 0 if success, otherwise error code
1805 static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty)
1807 unsigned long flags;
1808 MGSL_PARAMS tmp_params;
1811 if (debug_level >= DEBUG_LEVEL_INFO)
1812 printk("%s(%d):set_params %s\n", __FILE__,__LINE__,
1814 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
1816 if (debug_level >= DEBUG_LEVEL_INFO)
1817 printk("%s(%d):set_params(%s) user buffer copy failed\n",
1818 __FILE__, __LINE__, info->device_name);
1822 spin_lock_irqsave(&info->lock, flags);
1823 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
1824 spin_unlock_irqrestore(&info->lock, flags);
1826 mgslpc_change_params(info, tty);
1831 static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode)
1834 if (debug_level >= DEBUG_LEVEL_INFO)
1835 printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode);
1836 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
1842 static int set_txidle(MGSLPC_INFO * info, int idle_mode)
1844 unsigned long flags;
1845 if (debug_level >= DEBUG_LEVEL_INFO)
1846 printk("set_txidle(%s,%d)\n", info->device_name, idle_mode);
1847 spin_lock_irqsave(&info->lock, flags);
1848 info->idle_mode = idle_mode;
1850 spin_unlock_irqrestore(&info->lock, flags);
1854 static int get_interface(MGSLPC_INFO * info, int __user *if_mode)
1857 if (debug_level >= DEBUG_LEVEL_INFO)
1858 printk("get_interface(%s)=%d\n", info->device_name, info->if_mode);
1859 COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int));
1865 static int set_interface(MGSLPC_INFO * info, int if_mode)
1867 unsigned long flags;
1869 if (debug_level >= DEBUG_LEVEL_INFO)
1870 printk("set_interface(%s,%d)\n", info->device_name, if_mode);
1871 spin_lock_irqsave(&info->lock, flags);
1872 info->if_mode = if_mode;
1874 val = read_reg(info, PVR) & 0x0f;
1875 switch (info->if_mode)
1877 case MGSL_INTERFACE_RS232: val |= PVR_RS232; break;
1878 case MGSL_INTERFACE_V35: val |= PVR_V35; break;
1879 case MGSL_INTERFACE_RS422: val |= PVR_RS422; break;
1881 write_reg(info, PVR, val);
1883 spin_unlock_irqrestore(&info->lock, flags);
1887 static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty)
1889 unsigned long flags;
1891 if (debug_level >= DEBUG_LEVEL_INFO)
1892 printk("set_txenable(%s,%d)\n", info->device_name, enable);
1894 spin_lock_irqsave(&info->lock, flags);
1896 if (!info->tx_enabled)
1897 tx_start(info, tty);
1899 if (info->tx_enabled)
1902 spin_unlock_irqrestore(&info->lock, flags);
1906 static int tx_abort(MGSLPC_INFO * info)
1908 unsigned long flags;
1910 if (debug_level >= DEBUG_LEVEL_INFO)
1911 printk("tx_abort(%s)\n", info->device_name);
1913 spin_lock_irqsave(&info->lock, flags);
1914 if (info->tx_active && info->tx_count &&
1915 info->params.mode == MGSL_MODE_HDLC) {
1916 /* clear data count so FIFO is not filled on next IRQ.
1917 * This results in underrun and abort transmission.
1919 info->tx_count = info->tx_put = info->tx_get = 0;
1920 info->tx_aborting = true;
1922 spin_unlock_irqrestore(&info->lock, flags);
1926 static int set_rxenable(MGSLPC_INFO * info, int enable)
1928 unsigned long flags;
1930 if (debug_level >= DEBUG_LEVEL_INFO)
1931 printk("set_rxenable(%s,%d)\n", info->device_name, enable);
1933 spin_lock_irqsave(&info->lock, flags);
1935 if (!info->rx_enabled)
1938 if (info->rx_enabled)
1941 spin_unlock_irqrestore(&info->lock, flags);
1945 /* wait for specified event to occur
1947 * Arguments: info pointer to device instance data
1948 * mask pointer to bitmask of events to wait for
1949 * Return Value: 0 if successful and bit mask updated with
1950 * of events triggerred,
1951 * otherwise error code
1953 static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
1955 unsigned long flags;
1958 struct mgsl_icount cprev, cnow;
1961 struct _input_signal_events oldsigs, newsigs;
1962 DECLARE_WAITQUEUE(wait, current);
1964 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
1968 if (debug_level >= DEBUG_LEVEL_INFO)
1969 printk("wait_events(%s,%d)\n", info->device_name, mask);
1971 spin_lock_irqsave(&info->lock, flags);
1973 /* return immediately if state matches requested events */
1975 s = info->serial_signals;
1977 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
1978 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
1979 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
1980 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
1982 spin_unlock_irqrestore(&info->lock, flags);
1986 /* save current irq counts */
1987 cprev = info->icount;
1988 oldsigs = info->input_signal_events;
1990 if ((info->params.mode == MGSL_MODE_HDLC) &&
1991 (mask & MgslEvent_ExitHuntMode))
1992 irq_enable(info, CHA, IRQ_EXITHUNT);
1994 set_current_state(TASK_INTERRUPTIBLE);
1995 add_wait_queue(&info->event_wait_q, &wait);
1997 spin_unlock_irqrestore(&info->lock, flags);
2002 if (signal_pending(current)) {
2007 /* get current irq counts */
2008 spin_lock_irqsave(&info->lock, flags);
2009 cnow = info->icount;
2010 newsigs = info->input_signal_events;
2011 set_current_state(TASK_INTERRUPTIBLE);
2012 spin_unlock_irqrestore(&info->lock, flags);
2014 /* if no change, wait aborted for some reason */
2015 if (newsigs.dsr_up == oldsigs.dsr_up &&
2016 newsigs.dsr_down == oldsigs.dsr_down &&
2017 newsigs.dcd_up == oldsigs.dcd_up &&
2018 newsigs.dcd_down == oldsigs.dcd_down &&
2019 newsigs.cts_up == oldsigs.cts_up &&
2020 newsigs.cts_down == oldsigs.cts_down &&
2021 newsigs.ri_up == oldsigs.ri_up &&
2022 newsigs.ri_down == oldsigs.ri_down &&
2023 cnow.exithunt == cprev.exithunt &&
2024 cnow.rxidle == cprev.rxidle) {
2030 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
2031 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
2032 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
2033 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
2034 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
2035 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
2036 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
2037 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
2038 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
2039 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
2047 remove_wait_queue(&info->event_wait_q, &wait);
2048 set_current_state(TASK_RUNNING);
2050 if (mask & MgslEvent_ExitHuntMode) {
2051 spin_lock_irqsave(&info->lock, flags);
2052 if (!waitqueue_active(&info->event_wait_q))
2053 irq_disable(info, CHA, IRQ_EXITHUNT);
2054 spin_unlock_irqrestore(&info->lock, flags);
2058 PUT_USER(rc, events, mask_ptr);
2062 static int modem_input_wait(MGSLPC_INFO *info,int arg)
2064 unsigned long flags;
2066 struct mgsl_icount cprev, cnow;
2067 DECLARE_WAITQUEUE(wait, current);
2069 /* save current irq counts */
2070 spin_lock_irqsave(&info->lock, flags);
2071 cprev = info->icount;
2072 add_wait_queue(&info->status_event_wait_q, &wait);
2073 set_current_state(TASK_INTERRUPTIBLE);
2074 spin_unlock_irqrestore(&info->lock, flags);
2078 if (signal_pending(current)) {
2083 /* get new irq counts */
2084 spin_lock_irqsave(&info->lock, flags);
2085 cnow = info->icount;
2086 set_current_state(TASK_INTERRUPTIBLE);
2087 spin_unlock_irqrestore(&info->lock, flags);
2089 /* if no change, wait aborted for some reason */
2090 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2091 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
2096 /* check for change in caller specified modem input */
2097 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
2098 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
2099 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
2100 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
2107 remove_wait_queue(&info->status_event_wait_q, &wait);
2108 set_current_state(TASK_RUNNING);
2112 /* return the state of the serial control and status signals
2114 static int tiocmget(struct tty_struct *tty)
2116 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2117 unsigned int result;
2118 unsigned long flags;
2120 spin_lock_irqsave(&info->lock, flags);
2122 spin_unlock_irqrestore(&info->lock, flags);
2124 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
2125 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
2126 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
2127 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
2128 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
2129 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
2131 if (debug_level >= DEBUG_LEVEL_INFO)
2132 printk("%s(%d):%s tiocmget() value=%08X\n",
2133 __FILE__, __LINE__, info->device_name, result);
2137 /* set modem control signals (DTR/RTS)
2139 static int tiocmset(struct tty_struct *tty,
2140 unsigned int set, unsigned int clear)
2142 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2143 unsigned long flags;
2145 if (debug_level >= DEBUG_LEVEL_INFO)
2146 printk("%s(%d):%s tiocmset(%x,%x)\n",
2147 __FILE__, __LINE__, info->device_name, set, clear);
2149 if (set & TIOCM_RTS)
2150 info->serial_signals |= SerialSignal_RTS;
2151 if (set & TIOCM_DTR)
2152 info->serial_signals |= SerialSignal_DTR;
2153 if (clear & TIOCM_RTS)
2154 info->serial_signals &= ~SerialSignal_RTS;
2155 if (clear & TIOCM_DTR)
2156 info->serial_signals &= ~SerialSignal_DTR;
2158 spin_lock_irqsave(&info->lock, flags);
2160 spin_unlock_irqrestore(&info->lock, flags);
2165 /* Set or clear transmit break condition
2167 * Arguments: tty pointer to tty instance data
2168 * break_state -1=set break condition, 0=clear
2170 static int mgslpc_break(struct tty_struct *tty, int break_state)
2172 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2173 unsigned long flags;
2175 if (debug_level >= DEBUG_LEVEL_INFO)
2176 printk("%s(%d):mgslpc_break(%s,%d)\n",
2177 __FILE__, __LINE__, info->device_name, break_state);
2179 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break"))
2182 spin_lock_irqsave(&info->lock, flags);
2183 if (break_state == -1)
2184 set_reg_bits(info, CHA+DAFO, BIT6);
2186 clear_reg_bits(info, CHA+DAFO, BIT6);
2187 spin_unlock_irqrestore(&info->lock, flags);
2191 static int mgslpc_get_icount(struct tty_struct *tty,
2192 struct serial_icounter_struct *icount)
2194 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2195 struct mgsl_icount cnow; /* kernel counter temps */
2196 unsigned long flags;
2198 spin_lock_irqsave(&info->lock, flags);
2199 cnow = info->icount;
2200 spin_unlock_irqrestore(&info->lock, flags);
2202 icount->cts = cnow.cts;
2203 icount->dsr = cnow.dsr;
2204 icount->rng = cnow.rng;
2205 icount->dcd = cnow.dcd;
2206 icount->rx = cnow.rx;
2207 icount->tx = cnow.tx;
2208 icount->frame = cnow.frame;
2209 icount->overrun = cnow.overrun;
2210 icount->parity = cnow.parity;
2211 icount->brk = cnow.brk;
2212 icount->buf_overrun = cnow.buf_overrun;
2217 /* Service an IOCTL request
2221 * tty pointer to tty instance data
2222 * cmd IOCTL command code
2223 * arg command argument/context
2225 * Return Value: 0 if success, otherwise error code
2227 static int mgslpc_ioctl(struct tty_struct *tty,
2228 unsigned int cmd, unsigned long arg)
2230 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2231 void __user *argp = (void __user *)arg;
2233 if (debug_level >= DEBUG_LEVEL_INFO)
2234 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__, __LINE__,
2235 info->device_name, cmd);
2237 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl"))
2240 if (cmd != TIOCMIWAIT) {
2241 if (tty_io_error(tty))
2246 case MGSL_IOCGPARAMS:
2247 return get_params(info, argp);
2248 case MGSL_IOCSPARAMS:
2249 return set_params(info, argp, tty);
2250 case MGSL_IOCGTXIDLE:
2251 return get_txidle(info, argp);
2252 case MGSL_IOCSTXIDLE:
2253 return set_txidle(info, (int)arg);
2255 return get_interface(info, argp);
2257 return set_interface(info,(int)arg);
2258 case MGSL_IOCTXENABLE:
2259 return set_txenable(info,(int)arg, tty);
2260 case MGSL_IOCRXENABLE:
2261 return set_rxenable(info,(int)arg);
2262 case MGSL_IOCTXABORT:
2263 return tx_abort(info);
2264 case MGSL_IOCGSTATS:
2265 return get_stats(info, argp);
2266 case MGSL_IOCWAITEVENT:
2267 return wait_events(info, argp);
2269 return modem_input_wait(info,(int)arg);
2271 return -ENOIOCTLCMD;
2276 /* Set new termios settings
2280 * tty pointer to tty structure
2281 * termios pointer to buffer to hold returned old termios
2283 static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2285 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2286 unsigned long flags;
2288 if (debug_level >= DEBUG_LEVEL_INFO)
2289 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__, __LINE__,
2292 /* just return if nothing has changed */
2293 if ((tty->termios.c_cflag == old_termios->c_cflag)
2294 && (RELEVANT_IFLAG(tty->termios.c_iflag)
2295 == RELEVANT_IFLAG(old_termios->c_iflag)))
2298 mgslpc_change_params(info, tty);
2300 /* Handle transition to B0 status */
2301 if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) {
2302 info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
2303 spin_lock_irqsave(&info->lock, flags);
2305 spin_unlock_irqrestore(&info->lock, flags);
2308 /* Handle transition away from B0 status */
2309 if (!(old_termios->c_cflag & CBAUD) && C_BAUD(tty)) {
2310 info->serial_signals |= SerialSignal_DTR;
2311 if (!C_CRTSCTS(tty) || !tty_throttled(tty))
2312 info->serial_signals |= SerialSignal_RTS;
2313 spin_lock_irqsave(&info->lock, flags);
2315 spin_unlock_irqrestore(&info->lock, flags);
2318 /* Handle turning off CRTSCTS */
2319 if (old_termios->c_cflag & CRTSCTS && !C_CRTSCTS(tty)) {
2320 tty->hw_stopped = 0;
2325 static void mgslpc_close(struct tty_struct *tty, struct file * filp)
2327 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2328 struct tty_port *port = &info->port;
2330 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close"))
2333 if (debug_level >= DEBUG_LEVEL_INFO)
2334 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2335 __FILE__, __LINE__, info->device_name, port->count);
2337 if (tty_port_close_start(port, tty, filp) == 0)
2340 if (tty_port_initialized(port))
2341 mgslpc_wait_until_sent(tty, info->timeout);
2343 mgslpc_flush_buffer(tty);
2345 tty_ldisc_flush(tty);
2346 shutdown(info, tty);
2348 tty_port_close_end(port, tty);
2349 tty_port_tty_set(port, NULL);
2351 if (debug_level >= DEBUG_LEVEL_INFO)
2352 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__, __LINE__,
2353 tty->driver->name, port->count);
2356 /* Wait until the transmitter is empty.
2358 static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
2360 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2361 unsigned long orig_jiffies, char_time;
2366 if (debug_level >= DEBUG_LEVEL_INFO)
2367 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2368 __FILE__, __LINE__, info->device_name);
2370 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
2373 if (!tty_port_initialized(&info->port))
2376 orig_jiffies = jiffies;
2378 /* Set check interval to 1/5 of estimated time to
2379 * send a character, and make it at least 1. The check
2380 * interval should also be less than the timeout.
2381 * Note: use tight timings here to satisfy the NIST-PCTS.
2384 if (info->params.data_rate) {
2385 char_time = info->timeout/(32 * 5);
2392 char_time = min_t(unsigned long, char_time, timeout);
2394 if (info->params.mode == MGSL_MODE_HDLC) {
2395 while (info->tx_active) {
2396 msleep_interruptible(jiffies_to_msecs(char_time));
2397 if (signal_pending(current))
2399 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2403 while ((info->tx_count || info->tx_active) &&
2405 msleep_interruptible(jiffies_to_msecs(char_time));
2406 if (signal_pending(current))
2408 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2414 if (debug_level >= DEBUG_LEVEL_INFO)
2415 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2416 __FILE__, __LINE__, info->device_name);
2419 /* Called by tty_hangup() when a hangup is signaled.
2420 * This is the same as closing all open files for the port.
2422 static void mgslpc_hangup(struct tty_struct *tty)
2424 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2426 if (debug_level >= DEBUG_LEVEL_INFO)
2427 printk("%s(%d):mgslpc_hangup(%s)\n",
2428 __FILE__, __LINE__, info->device_name);
2430 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup"))
2433 mgslpc_flush_buffer(tty);
2434 shutdown(info, tty);
2435 tty_port_hangup(&info->port);
2438 static int carrier_raised(struct tty_port *port)
2440 MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
2441 unsigned long flags;
2443 spin_lock_irqsave(&info->lock, flags);
2445 spin_unlock_irqrestore(&info->lock, flags);
2447 if (info->serial_signals & SerialSignal_DCD)
2452 static void dtr_rts(struct tty_port *port, int onoff)
2454 MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
2455 unsigned long flags;
2457 spin_lock_irqsave(&info->lock, flags);
2459 info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
2461 info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
2463 spin_unlock_irqrestore(&info->lock, flags);
2467 static int mgslpc_open(struct tty_struct *tty, struct file * filp)
2470 struct tty_port *port;
2472 unsigned long flags;
2474 /* verify range of specified line number */
2476 if (line >= mgslpc_device_count) {
2477 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2478 __FILE__, __LINE__, line);
2482 /* find the info structure for the specified line */
2483 info = mgslpc_device_list;
2484 while(info && info->line != line)
2485 info = info->next_device;
2486 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open"))
2490 tty->driver_data = info;
2491 tty_port_tty_set(port, tty);
2493 if (debug_level >= DEBUG_LEVEL_INFO)
2494 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2495 __FILE__, __LINE__, tty->driver->name, port->count);
2497 port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2499 spin_lock_irqsave(&info->netlock, flags);
2500 if (info->netcount) {
2502 spin_unlock_irqrestore(&info->netlock, flags);
2505 spin_lock(&port->lock);
2507 spin_unlock(&port->lock);
2508 spin_unlock_irqrestore(&info->netlock, flags);
2510 if (port->count == 1) {
2511 /* 1st open on this device, init hardware */
2512 retval = startup(info, tty);
2517 retval = tty_port_block_til_ready(&info->port, tty, filp);
2519 if (debug_level >= DEBUG_LEVEL_INFO)
2520 printk("%s(%d):block_til_ready(%s) returned %d\n",
2521 __FILE__, __LINE__, info->device_name, retval);
2525 if (debug_level >= DEBUG_LEVEL_INFO)
2526 printk("%s(%d):mgslpc_open(%s) success\n",
2527 __FILE__, __LINE__, info->device_name);
2535 * /proc fs routines....
2538 static inline void line_info(struct seq_file *m, MGSLPC_INFO *info)
2541 unsigned long flags;
2543 seq_printf(m, "%s:io:%04X irq:%d",
2544 info->device_name, info->io_base, info->irq_level);
2546 /* output current serial signal states */
2547 spin_lock_irqsave(&info->lock, flags);
2549 spin_unlock_irqrestore(&info->lock, flags);
2553 if (info->serial_signals & SerialSignal_RTS)
2554 strcat(stat_buf, "|RTS");
2555 if (info->serial_signals & SerialSignal_CTS)
2556 strcat(stat_buf, "|CTS");
2557 if (info->serial_signals & SerialSignal_DTR)
2558 strcat(stat_buf, "|DTR");
2559 if (info->serial_signals & SerialSignal_DSR)
2560 strcat(stat_buf, "|DSR");
2561 if (info->serial_signals & SerialSignal_DCD)
2562 strcat(stat_buf, "|CD");
2563 if (info->serial_signals & SerialSignal_RI)
2564 strcat(stat_buf, "|RI");
2566 if (info->params.mode == MGSL_MODE_HDLC) {
2567 seq_printf(m, " HDLC txok:%d rxok:%d",
2568 info->icount.txok, info->icount.rxok);
2569 if (info->icount.txunder)
2570 seq_printf(m, " txunder:%d", info->icount.txunder);
2571 if (info->icount.txabort)
2572 seq_printf(m, " txabort:%d", info->icount.txabort);
2573 if (info->icount.rxshort)
2574 seq_printf(m, " rxshort:%d", info->icount.rxshort);
2575 if (info->icount.rxlong)
2576 seq_printf(m, " rxlong:%d", info->icount.rxlong);
2577 if (info->icount.rxover)
2578 seq_printf(m, " rxover:%d", info->icount.rxover);
2579 if (info->icount.rxcrc)
2580 seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
2582 seq_printf(m, " ASYNC tx:%d rx:%d",
2583 info->icount.tx, info->icount.rx);
2584 if (info->icount.frame)
2585 seq_printf(m, " fe:%d", info->icount.frame);
2586 if (info->icount.parity)
2587 seq_printf(m, " pe:%d", info->icount.parity);
2588 if (info->icount.brk)
2589 seq_printf(m, " brk:%d", info->icount.brk);
2590 if (info->icount.overrun)
2591 seq_printf(m, " oe:%d", info->icount.overrun);
2594 /* Append serial signal status to end */
2595 seq_printf(m, " %s\n", stat_buf+1);
2597 seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2598 info->tx_active,info->bh_requested,info->bh_running,
2602 /* Called to print information about devices
2604 static int mgslpc_proc_show(struct seq_file *m, void *v)
2608 seq_printf(m, "synclink driver:%s\n", driver_version);
2610 info = mgslpc_device_list;
2613 info = info->next_device;
2618 static int rx_alloc_buffers(MGSLPC_INFO *info)
2620 /* each buffer has header and data */
2621 info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size;
2623 /* calculate total allocation size for 8 buffers */
2624 info->rx_buf_total_size = info->rx_buf_size * 8;
2626 /* limit total allocated memory */
2627 if (info->rx_buf_total_size > 0x10000)
2628 info->rx_buf_total_size = 0x10000;
2630 /* calculate number of buffers */
2631 info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size;
2633 info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL);
2634 if (info->rx_buf == NULL)
2637 /* unused flag buffer to satisfy receive_buf calling interface */
2638 info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL);
2639 if (!info->flag_buf) {
2640 kfree(info->rx_buf);
2641 info->rx_buf = NULL;
2645 rx_reset_buffers(info);
2649 static void rx_free_buffers(MGSLPC_INFO *info)
2651 kfree(info->rx_buf);
2652 info->rx_buf = NULL;
2653 kfree(info->flag_buf);
2654 info->flag_buf = NULL;
2657 static int claim_resources(MGSLPC_INFO *info)
2659 if (rx_alloc_buffers(info) < 0) {
2660 printk("Can't allocate rx buffer %s\n", info->device_name);
2661 release_resources(info);
2667 static void release_resources(MGSLPC_INFO *info)
2669 if (debug_level >= DEBUG_LEVEL_INFO)
2670 printk("release_resources(%s)\n", info->device_name);
2671 rx_free_buffers(info);
2674 /* Add the specified device instance data structure to the
2675 * global linked list of devices and increment the device count.
2677 * Arguments: info pointer to device instance data
2679 static int mgslpc_add_device(MGSLPC_INFO *info)
2681 MGSLPC_INFO *current_dev = NULL;
2682 struct device *tty_dev;
2685 info->next_device = NULL;
2686 info->line = mgslpc_device_count;
2687 sprintf(info->device_name,"ttySLP%d",info->line);
2689 if (info->line < MAX_DEVICE_COUNT) {
2690 if (maxframe[info->line])
2691 info->max_frame_size = maxframe[info->line];
2694 mgslpc_device_count++;
2696 if (!mgslpc_device_list)
2697 mgslpc_device_list = info;
2699 current_dev = mgslpc_device_list;
2700 while (current_dev->next_device)
2701 current_dev = current_dev->next_device;
2702 current_dev->next_device = info;
2705 if (info->max_frame_size < 4096)
2706 info->max_frame_size = 4096;
2707 else if (info->max_frame_size > 65535)
2708 info->max_frame_size = 65535;
2710 printk("SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2711 info->device_name, info->io_base, info->irq_level);
2713 #if SYNCLINK_GENERIC_HDLC
2714 ret = hdlcdev_init(info);
2719 tty_dev = tty_port_register_device(&info->port, serial_driver, info->line,
2721 if (IS_ERR(tty_dev)) {
2722 ret = PTR_ERR(tty_dev);
2723 #if SYNCLINK_GENERIC_HDLC
2733 current_dev->next_device = NULL;
2735 mgslpc_device_list = NULL;
2736 mgslpc_device_count--;
2740 static void mgslpc_remove_device(MGSLPC_INFO *remove_info)
2742 MGSLPC_INFO *info = mgslpc_device_list;
2743 MGSLPC_INFO *last = NULL;
2746 if (info == remove_info) {
2748 last->next_device = info->next_device;
2750 mgslpc_device_list = info->next_device;
2751 tty_unregister_device(serial_driver, info->line);
2752 #if SYNCLINK_GENERIC_HDLC
2755 release_resources(info);
2756 tty_port_destroy(&info->port);
2758 mgslpc_device_count--;
2762 info = info->next_device;
2766 static const struct pcmcia_device_id mgslpc_ids[] = {
2767 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2770 MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids);
2772 static struct pcmcia_driver mgslpc_driver = {
2773 .owner = THIS_MODULE,
2774 .name = "synclink_cs",
2775 .probe = mgslpc_probe,
2776 .remove = mgslpc_detach,
2777 .id_table = mgslpc_ids,
2778 .suspend = mgslpc_suspend,
2779 .resume = mgslpc_resume,
2782 static const struct tty_operations mgslpc_ops = {
2783 .open = mgslpc_open,
2784 .close = mgslpc_close,
2785 .write = mgslpc_write,
2786 .put_char = mgslpc_put_char,
2787 .flush_chars = mgslpc_flush_chars,
2788 .write_room = mgslpc_write_room,
2789 .chars_in_buffer = mgslpc_chars_in_buffer,
2790 .flush_buffer = mgslpc_flush_buffer,
2791 .ioctl = mgslpc_ioctl,
2792 .throttle = mgslpc_throttle,
2793 .unthrottle = mgslpc_unthrottle,
2794 .send_xchar = mgslpc_send_xchar,
2795 .break_ctl = mgslpc_break,
2796 .wait_until_sent = mgslpc_wait_until_sent,
2797 .set_termios = mgslpc_set_termios,
2799 .start = tx_release,
2800 .hangup = mgslpc_hangup,
2801 .tiocmget = tiocmget,
2802 .tiocmset = tiocmset,
2803 .get_icount = mgslpc_get_icount,
2804 .proc_show = mgslpc_proc_show,
2807 static int __init synclink_cs_init(void)
2811 if (break_on_load) {
2812 mgslpc_get_text_ptr();
2816 serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT,
2817 TTY_DRIVER_REAL_RAW |
2818 TTY_DRIVER_DYNAMIC_DEV);
2819 if (IS_ERR(serial_driver)) {
2820 rc = PTR_ERR(serial_driver);
2824 /* Initialize the tty_driver structure */
2825 serial_driver->driver_name = "synclink_cs";
2826 serial_driver->name = "ttySLP";
2827 serial_driver->major = ttymajor;
2828 serial_driver->minor_start = 64;
2829 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
2830 serial_driver->subtype = SERIAL_TYPE_NORMAL;
2831 serial_driver->init_termios = tty_std_termios;
2832 serial_driver->init_termios.c_cflag =
2833 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2834 tty_set_operations(serial_driver, &mgslpc_ops);
2836 rc = tty_register_driver(serial_driver);
2838 printk(KERN_ERR "%s(%d):Couldn't register serial driver\n",
2839 __FILE__, __LINE__);
2843 rc = pcmcia_register_driver(&mgslpc_driver);
2847 printk(KERN_INFO "%s %s, tty major#%d\n", driver_name, driver_version,
2848 serial_driver->major);
2852 tty_unregister_driver(serial_driver);
2854 put_tty_driver(serial_driver);
2859 static void __exit synclink_cs_exit(void)
2861 pcmcia_unregister_driver(&mgslpc_driver);
2862 tty_unregister_driver(serial_driver);
2863 put_tty_driver(serial_driver);
2866 module_init(synclink_cs_init);
2867 module_exit(synclink_cs_exit);
2869 static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate)
2874 /* note:standard BRG mode is broken in V3.2 chip
2875 * so enhanced mode is always used
2883 for (M = 1; N > 64 && M < 16; M++)
2889 * BGR[7..0] contained in BGR register
2890 * BGR[9..8] contained in CCR2[7..6]
2891 * divisor = (N+1)*2^M
2893 * Note: M *must* not be zero (causes asymetric duty cycle)
2895 write_reg(info, (unsigned char) (channel + BGR),
2896 (unsigned char) ((M << 6) + N));
2897 val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f;
2898 val |= ((M << 4) & 0xc0);
2899 write_reg(info, (unsigned char) (channel + CCR2), val);
2903 /* Enabled the AUX clock output at the specified frequency.
2905 static void enable_auxclk(MGSLPC_INFO *info)
2911 * 07..06 MDS[1..0] 10 = transparent HDLC mode
2912 * 05 ADM Address Mode, 0 = no addr recognition
2913 * 04 TMD Timer Mode, 0 = external
2914 * 03 RAC Receiver Active, 0 = inactive
2915 * 02 RTS 0=RTS active during xmit, 1=RTS always active
2916 * 01 TRS Timer Resolution, 1=512
2917 * 00 TLP Test Loop, 0 = no loop
2923 /* channel B RTS is used to enable AUXCLK driver on SP505 */
2924 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
2926 write_reg(info, CHB + MODE, val);
2930 * 07 PU Power Up, 1=active, 0=power down
2931 * 06 MCE Master Clock Enable, 1=enabled
2933 * 04..02 SC[2..0] Encoding
2934 * 01..00 SM[1..0] Serial Mode, 00=HDLC
2938 write_reg(info, CHB + CCR0, 0xc0);
2942 * 07 SFLG Shared Flag, 0 = disable shared flags
2943 * 06 GALP Go Active On Loop, 0 = not used
2944 * 05 GLP Go On Loop, 0 = not used
2945 * 04 ODS Output Driver Select, 1=TxD is push-pull output
2946 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
2947 * 02..00 CM[2..0] Clock Mode
2951 write_reg(info, CHB + CCR1, 0x17);
2955 * 07..06 BGR[9..8] Baud rate bits 9..8
2956 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
2957 * 04 SSEL Clock source select, 1=submode b
2958 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
2959 * 02 RWX Read/Write Exchange 0=disabled
2960 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
2961 * 00 DIV, data inversion 0=disabled, 1=enabled
2965 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
2966 write_reg(info, CHB + CCR2, 0x38);
2968 write_reg(info, CHB + CCR2, 0x30);
2972 * 07 MCK4 Master Clock Divide by 4, 1=enabled
2973 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
2974 * 05 TST1 Test Pin, 0=normal operation
2975 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
2976 * 03..02 Reserved, must be 0
2977 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
2981 write_reg(info, CHB + CCR4, 0x50);
2983 /* if auxclk not enabled, set internal BRG so
2984 * CTS transitions can be detected (requires TxC)
2986 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
2987 mgslpc_set_rate(info, CHB, info->params.clock_speed);
2989 mgslpc_set_rate(info, CHB, 921600);
2992 static void loopback_enable(MGSLPC_INFO *info)
2996 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
2997 val = read_reg(info, CHA + CCR1) | (BIT2 | BIT1 | BIT0);
2998 write_reg(info, CHA + CCR1, val);
3000 /* CCR2:04 SSEL Clock source select, 1=submode b */
3001 val = read_reg(info, CHA + CCR2) | (BIT4 | BIT5);
3002 write_reg(info, CHA + CCR2, val);
3004 /* set LinkSpeed if available, otherwise default to 2Mbps */
3005 if (info->params.clock_speed)
3006 mgslpc_set_rate(info, CHA, info->params.clock_speed);
3008 mgslpc_set_rate(info, CHA, 1843200);
3010 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3011 val = read_reg(info, CHA + MODE) | BIT0;
3012 write_reg(info, CHA + MODE, val);
3015 static void hdlc_mode(MGSLPC_INFO *info)
3018 unsigned char clkmode, clksubmode;
3020 /* disable all interrupts */
3021 irq_disable(info, CHA, 0xffff);
3022 irq_disable(info, CHB, 0xffff);
3023 port_irq_disable(info, 0xff);
3025 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3026 clkmode = clksubmode = 0;
3027 if (info->params.flags & HDLC_FLAG_RXC_DPLL
3028 && info->params.flags & HDLC_FLAG_TXC_DPLL) {
3029 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3031 } else if (info->params.flags & HDLC_FLAG_RXC_BRG
3032 && info->params.flags & HDLC_FLAG_TXC_BRG) {
3033 /* clock mode 7b, rcv = BRG, xmt = BRG */
3036 } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) {
3037 if (info->params.flags & HDLC_FLAG_TXC_BRG) {
3038 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3042 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3045 } else if (info->params.flags & HDLC_FLAG_TXC_BRG) {
3046 /* clock mode 0b, rcv = RxC, xmt = BRG */
3052 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3053 * 05 ADM Address Mode, 0 = no addr recognition
3054 * 04 TMD Timer Mode, 0 = external
3055 * 03 RAC Receiver Active, 0 = inactive
3056 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3057 * 01 TRS Timer Resolution, 1=512
3058 * 00 TLP Test Loop, 0 = no loop
3063 if (info->params.loopback)
3066 /* preserve RTS state */
3067 if (info->serial_signals & SerialSignal_RTS)
3069 write_reg(info, CHA + MODE, val);
3073 * 07 PU Power Up, 1=active, 0=power down
3074 * 06 MCE Master Clock Enable, 1=enabled
3076 * 04..02 SC[2..0] Encoding
3077 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3082 switch (info->params.encoding)
3084 case HDLC_ENCODING_NRZI:
3087 case HDLC_ENCODING_BIPHASE_SPACE:
3090 case HDLC_ENCODING_BIPHASE_MARK:
3093 case HDLC_ENCODING_BIPHASE_LEVEL:
3095 break; // Manchester
3097 write_reg(info, CHA + CCR0, val);
3101 * 07 SFLG Shared Flag, 0 = disable shared flags
3102 * 06 GALP Go Active On Loop, 0 = not used
3103 * 05 GLP Go On Loop, 0 = not used
3104 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3105 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3106 * 02..00 CM[2..0] Clock Mode
3110 val = 0x10 + clkmode;
3111 write_reg(info, CHA + CCR1, val);
3115 * 07..06 BGR[9..8] Baud rate bits 9..8
3116 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3117 * 04 SSEL Clock source select, 1=submode b
3118 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3119 * 02 RWX Read/Write Exchange 0=disabled
3120 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3121 * 00 DIV, data inversion 0=disabled, 1=enabled
3126 if (clkmode == 2 || clkmode == 3 || clkmode == 6
3127 || clkmode == 7 || (clkmode == 0 && clksubmode == 1))
3131 if (info->params.crc_type == HDLC_CRC_32_CCITT)
3133 if (info->params.encoding == HDLC_ENCODING_NRZB)
3135 write_reg(info, CHA + CCR2, val);
3139 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3140 * 05 EPT Enable preamble transmission, 1=enabled
3141 * 04 RADD Receive address pushed to FIFO, 0=disabled
3142 * 03 CRL CRC Reset Level, 0=FFFF
3143 * 02 RCRC Rx CRC 0=On 1=Off
3144 * 01 TCRC Tx CRC 0=On 1=Off
3145 * 00 PSD DPLL Phase Shift Disable
3150 if (info->params.crc_type == HDLC_CRC_NONE)
3152 if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
3154 switch (info->params.preamble_length)
3156 case HDLC_PREAMBLE_LENGTH_16BITS:
3159 case HDLC_PREAMBLE_LENGTH_32BITS:
3162 case HDLC_PREAMBLE_LENGTH_64BITS:
3166 write_reg(info, CHA + CCR3, val);
3168 /* PRE - Preamble pattern */
3170 switch (info->params.preamble)
3172 case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
3173 case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break;
3174 case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break;
3175 case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break;
3177 write_reg(info, CHA + PRE, val);
3181 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3182 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3183 * 05 TST1 Test Pin, 0=normal operation
3184 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3185 * 03..02 Reserved, must be 0
3186 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3191 write_reg(info, CHA + CCR4, val);
3192 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
3193 mgslpc_set_rate(info, CHA, info->params.clock_speed * 16);
3195 mgslpc_set_rate(info, CHA, info->params.clock_speed);
3197 /* RLCR Receive length check register
3199 * 7 1=enable receive length check
3200 * 6..0 Max frame length = (RL + 1) * 32
3202 write_reg(info, CHA + RLCR, 0);
3204 /* XBCH Transmit Byte Count High
3206 * 07 DMA mode, 0 = interrupt driven
3207 * 06 NRM, 0=ABM (ignored)
3208 * 05 CAS Carrier Auto Start
3209 * 04 XC Transmit Continuously (ignored)
3210 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3215 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
3217 write_reg(info, CHA + XBCH, val);
3218 enable_auxclk(info);
3219 if (info->params.loopback || info->testing_irq)
3220 loopback_enable(info);
3221 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
3223 irq_enable(info, CHB, IRQ_CTS);
3224 /* PVR[3] 1=AUTO CTS active */
3225 set_reg_bits(info, CHA + PVR, BIT3);
3227 clear_reg_bits(info, CHA + PVR, BIT3);
3229 irq_enable(info, CHA,
3230 IRQ_RXEOM | IRQ_RXFIFO | IRQ_ALLSENT |
3231 IRQ_UNDERRUN | IRQ_TXFIFO);
3232 issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
3233 wait_command_complete(info, CHA);
3234 read_reg16(info, CHA + ISR); /* clear pending IRQs */
3236 /* Master clock mode enabled above to allow reset commands
3237 * to complete even if no data clocks are present.
3239 * Disable master clock mode for normal communications because
3240 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3241 * IRQ when in master clock mode.
3243 * Leave master clock mode enabled for IRQ test because the
3244 * timer IRQ used by the test can only happen in master clock mode.
3246 if (!info->testing_irq)
3247 clear_reg_bits(info, CHA + CCR0, BIT6);
3255 static void rx_stop(MGSLPC_INFO *info)
3257 if (debug_level >= DEBUG_LEVEL_ISR)
3258 printk("%s(%d):rx_stop(%s)\n",
3259 __FILE__, __LINE__, info->device_name);
3261 /* MODE:03 RAC Receiver Active, 0=inactive */
3262 clear_reg_bits(info, CHA + MODE, BIT3);
3264 info->rx_enabled = false;
3265 info->rx_overflow = false;
3268 static void rx_start(MGSLPC_INFO *info)
3270 if (debug_level >= DEBUG_LEVEL_ISR)
3271 printk("%s(%d):rx_start(%s)\n",
3272 __FILE__, __LINE__, info->device_name);
3274 rx_reset_buffers(info);
3275 info->rx_enabled = false;
3276 info->rx_overflow = false;
3278 /* MODE:03 RAC Receiver Active, 1=active */
3279 set_reg_bits(info, CHA + MODE, BIT3);
3281 info->rx_enabled = true;
3284 static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty)
3286 if (debug_level >= DEBUG_LEVEL_ISR)
3287 printk("%s(%d):tx_start(%s)\n",
3288 __FILE__, __LINE__, info->device_name);
3290 if (info->tx_count) {
3291 /* If auto RTS enabled and RTS is inactive, then assert */
3292 /* RTS and set a flag indicating that the driver should */
3293 /* negate RTS when the transmission completes. */
3294 info->drop_rts_on_tx_done = false;
3296 if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
3298 if (!(info->serial_signals & SerialSignal_RTS)) {
3299 info->serial_signals |= SerialSignal_RTS;
3301 info->drop_rts_on_tx_done = true;
3305 if (info->params.mode == MGSL_MODE_ASYNC) {
3306 if (!info->tx_active) {
3307 info->tx_active = true;
3308 tx_ready(info, tty);
3311 info->tx_active = true;
3312 tx_ready(info, tty);
3313 mod_timer(&info->tx_timer, jiffies +
3314 msecs_to_jiffies(5000));
3318 if (!info->tx_enabled)
3319 info->tx_enabled = true;
3322 static void tx_stop(MGSLPC_INFO *info)
3324 if (debug_level >= DEBUG_LEVEL_ISR)
3325 printk("%s(%d):tx_stop(%s)\n",
3326 __FILE__, __LINE__, info->device_name);
3328 del_timer(&info->tx_timer);
3330 info->tx_enabled = false;
3331 info->tx_active = false;
3334 /* Reset the adapter to a known state and prepare it for further use.
3336 static void reset_device(MGSLPC_INFO *info)
3338 /* power up both channels (set BIT7) */
3339 write_reg(info, CHA + CCR0, 0x80);
3340 write_reg(info, CHB + CCR0, 0x80);
3341 write_reg(info, CHA + MODE, 0);
3342 write_reg(info, CHB + MODE, 0);
3344 /* disable all interrupts */
3345 irq_disable(info, CHA, 0xffff);
3346 irq_disable(info, CHB, 0xffff);
3347 port_irq_disable(info, 0xff);
3349 /* PCR Port Configuration Register
3351 * 07..04 DEC[3..0] Serial I/F select outputs
3352 * 03 output, 1=AUTO CTS control enabled
3353 * 02 RI Ring Indicator input 0=active
3354 * 01 DSR input 0=active
3355 * 00 DTR output 0=active
3359 write_reg(info, PCR, 0x06);
3361 /* PVR Port Value Register
3363 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3364 * 03 AUTO CTS output 1=enabled
3365 * 02 RI Ring Indicator input
3367 * 00 DTR output (1=inactive)
3371 // write_reg(info, PVR, PVR_DTR);
3373 /* IPC Interrupt Port Configuration
3375 * 07 VIS 1=Masked interrupts visible
3376 * 06..05 Reserved, 0
3377 * 04..03 SLA Slave address, 00 ignored
3378 * 02 CASM Cascading Mode, 1=daisy chain
3379 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3383 write_reg(info, IPC, 0x05);
3386 static void async_mode(MGSLPC_INFO *info)
3390 /* disable all interrupts */
3391 irq_disable(info, CHA, 0xffff);
3392 irq_disable(info, CHB, 0xffff);
3393 port_irq_disable(info, 0xff);
3398 * 06 FRTS RTS State, 0=active
3399 * 05 FCTS Flow Control on CTS
3400 * 04 FLON Flow Control Enable
3401 * 03 RAC Receiver Active, 0 = inactive
3402 * 02 RTS 0=Auto RTS, 1=manual RTS
3403 * 01 TRS Timer Resolution, 1=512
3404 * 00 TLP Test Loop, 0 = no loop
3409 if (info->params.loopback)
3412 /* preserve RTS state */
3413 if (!(info->serial_signals & SerialSignal_RTS))
3415 write_reg(info, CHA + MODE, val);
3419 * 07 PU Power Up, 1=active, 0=power down
3420 * 06 MCE Master Clock Enable, 1=enabled
3422 * 04..02 SC[2..0] Encoding, 000=NRZ
3423 * 01..00 SM[1..0] Serial Mode, 11=Async
3427 write_reg(info, CHA + CCR0, 0x83);
3431 * 07..05 Reserved, 0
3432 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3433 * 03 BCR Bit Clock Rate, 1=16x
3434 * 02..00 CM[2..0] Clock Mode, 111=BRG
3438 write_reg(info, CHA + CCR1, 0x1f);
3442 * 07..06 BGR[9..8] Baud rate bits 9..8
3443 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3444 * 04 SSEL Clock source select, 1=submode b
3445 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3446 * 02 RWX Read/Write Exchange 0=disabled
3448 * 00 DIV, data inversion 0=disabled, 1=enabled
3452 write_reg(info, CHA + CCR2, 0x10);
3456 * 07..01 Reserved, 0
3457 * 00 PSD DPLL Phase Shift Disable
3461 write_reg(info, CHA + CCR3, 0);
3465 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3466 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3467 * 05 TST1 Test Pin, 0=normal operation
3468 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3469 * 03..00 Reserved, must be 0
3473 write_reg(info, CHA + CCR4, 0x50);
3474 mgslpc_set_rate(info, CHA, info->params.data_rate * 16);
3479 * 06 XBRK transmit break, 0=normal operation
3480 * 05 Stop bits (0=1, 1=2)
3481 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3482 * 02 PAREN Parity Enable
3483 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3487 if (info->params.data_bits != 8)
3488 val |= BIT0; /* 7 bits */
3489 if (info->params.stop_bits != 1)
3491 if (info->params.parity != ASYNC_PARITY_NONE)
3493 val |= BIT2; /* Parity enable */
3494 if (info->params.parity == ASYNC_PARITY_ODD)
3499 write_reg(info, CHA + DAFO, val);
3501 /* RFC Rx FIFO Control
3504 * 06 DPS, 1=parity bit not stored in data byte
3505 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3506 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3507 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3509 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3513 write_reg(info, CHA + RFC, 0x5c);
3515 /* RLCR Receive length check register
3517 * Max frame length = (RL + 1) * 32
3519 write_reg(info, CHA + RLCR, 0);
3521 /* XBCH Transmit Byte Count High
3523 * 07 DMA mode, 0 = interrupt driven
3524 * 06 NRM, 0=ABM (ignored)
3525 * 05 CAS Carrier Auto Start
3526 * 04 XC Transmit Continuously (ignored)
3527 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3532 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
3534 write_reg(info, CHA + XBCH, val);
3535 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
3536 irq_enable(info, CHA, IRQ_CTS);
3538 /* MODE:03 RAC Receiver Active, 1=active */
3539 set_reg_bits(info, CHA + MODE, BIT3);
3540 enable_auxclk(info);
3541 if (info->params.flags & HDLC_FLAG_AUTO_CTS) {
3542 irq_enable(info, CHB, IRQ_CTS);
3543 /* PVR[3] 1=AUTO CTS active */
3544 set_reg_bits(info, CHA + PVR, BIT3);
3546 clear_reg_bits(info, CHA + PVR, BIT3);
3547 irq_enable(info, CHA,
3548 IRQ_RXEOM | IRQ_RXFIFO | IRQ_BREAK_ON | IRQ_RXTIME |
3549 IRQ_ALLSENT | IRQ_TXFIFO);
3550 issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
3551 wait_command_complete(info, CHA);
3552 read_reg16(info, CHA + ISR); /* clear pending IRQs */
3555 /* Set the HDLC idle mode for the transmitter.
3557 static void tx_set_idle(MGSLPC_INFO *info)
3559 /* Note: ESCC2 only supports flags and one idle modes */
3560 if (info->idle_mode == HDLC_TXIDLE_FLAGS)
3561 set_reg_bits(info, CHA + CCR1, BIT3);
3563 clear_reg_bits(info, CHA + CCR1, BIT3);
3566 /* get state of the V24 status (input) signals.
3568 static void get_signals(MGSLPC_INFO *info)
3570 unsigned char status = 0;
3572 /* preserve RTS and DTR */
3573 info->serial_signals &= SerialSignal_RTS | SerialSignal_DTR;
3575 if (read_reg(info, CHB + VSTR) & BIT7)
3576 info->serial_signals |= SerialSignal_DCD;
3577 if (read_reg(info, CHB + STAR) & BIT1)
3578 info->serial_signals |= SerialSignal_CTS;
3580 status = read_reg(info, CHA + PVR);
3581 if (!(status & PVR_RI))
3582 info->serial_signals |= SerialSignal_RI;
3583 if (!(status & PVR_DSR))
3584 info->serial_signals |= SerialSignal_DSR;
3587 /* Set the state of RTS and DTR based on contents of
3588 * serial_signals member of device extension.
3590 static void set_signals(MGSLPC_INFO *info)
3594 val = read_reg(info, CHA + MODE);
3595 if (info->params.mode == MGSL_MODE_ASYNC) {
3596 if (info->serial_signals & SerialSignal_RTS)
3601 if (info->serial_signals & SerialSignal_RTS)
3606 write_reg(info, CHA + MODE, val);
3608 if (info->serial_signals & SerialSignal_DTR)
3609 clear_reg_bits(info, CHA + PVR, PVR_DTR);
3611 set_reg_bits(info, CHA + PVR, PVR_DTR);
3614 static void rx_reset_buffers(MGSLPC_INFO *info)
3621 info->rx_frame_count = 0;
3622 for (i=0 ; i < info->rx_buf_count ; i++) {
3623 buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size));
3624 buf->status = buf->count = 0;
3628 /* Attempt to return a received HDLC frame
3629 * Only frames received without errors are returned.
3631 * Returns true if frame returned, otherwise false
3633 static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty)
3635 unsigned short status;
3637 unsigned int framesize = 0;
3638 unsigned long flags;
3639 bool return_frame = false;
3641 if (info->rx_frame_count == 0)
3644 buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size));
3646 status = buf->status;
3648 /* 07 VFR 1=valid frame
3649 * 06 RDO 1=data overrun
3650 * 05 CRC 1=OK, 0=error
3651 * 04 RAB 1=frame aborted
3653 if ((status & 0xf0) != 0xA0) {
3654 if (!(status & BIT7) || (status & BIT4))
3655 info->icount.rxabort++;
3656 else if (status & BIT6)
3657 info->icount.rxover++;
3658 else if (!(status & BIT5)) {
3659 info->icount.rxcrc++;
3660 if (info->params.crc_type & HDLC_CRC_RETURN_EX)
3661 return_frame = true;
3664 #if SYNCLINK_GENERIC_HDLC
3666 info->netdev->stats.rx_errors++;
3667 info->netdev->stats.rx_frame_errors++;
3671 return_frame = true;
3674 framesize = buf->count;
3676 if (debug_level >= DEBUG_LEVEL_BH)
3677 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3678 __FILE__, __LINE__, info->device_name, status, framesize);
3680 if (debug_level >= DEBUG_LEVEL_DATA)
3681 trace_block(info, buf->data, framesize, 0);
3684 if ((info->params.crc_type & HDLC_CRC_RETURN_EX &&
3685 framesize+1 > info->max_frame_size) ||
3686 framesize > info->max_frame_size)
3687 info->icount.rxlong++;
3690 info->icount.rxok++;
3692 if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
3693 *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR;
3697 #if SYNCLINK_GENERIC_HDLC
3699 hdlcdev_rx(info, buf->data, framesize);
3702 ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize);
3706 spin_lock_irqsave(&info->lock, flags);
3707 buf->status = buf->count = 0;
3708 info->rx_frame_count--;
3710 if (info->rx_get >= info->rx_buf_count)
3712 spin_unlock_irqrestore(&info->lock, flags);
3717 static bool register_test(MGSLPC_INFO *info)
3719 static unsigned char patterns[] =
3720 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3721 static unsigned int count = ARRAY_SIZE(patterns);
3724 unsigned long flags;
3726 spin_lock_irqsave(&info->lock, flags);
3729 for (i = 0; i < count; i++) {
3730 write_reg(info, XAD1, patterns[i]);
3731 write_reg(info, XAD2, patterns[(i + 1) % count]);
3732 if ((read_reg(info, XAD1) != patterns[i]) ||
3733 (read_reg(info, XAD2) != patterns[(i + 1) % count])) {
3739 spin_unlock_irqrestore(&info->lock, flags);
3743 static bool irq_test(MGSLPC_INFO *info)
3745 unsigned long end_time;
3746 unsigned long flags;
3748 spin_lock_irqsave(&info->lock, flags);
3751 info->testing_irq = true;
3754 info->irq_occurred = false;
3756 /* init hdlc mode */
3758 irq_enable(info, CHA, IRQ_TIMER);
3759 write_reg(info, CHA + TIMR, 0); /* 512 cycles */
3760 issue_command(info, CHA, CMD_START_TIMER);
3762 spin_unlock_irqrestore(&info->lock, flags);
3765 while(end_time-- && !info->irq_occurred) {
3766 msleep_interruptible(10);
3769 info->testing_irq = false;
3771 spin_lock_irqsave(&info->lock, flags);
3773 spin_unlock_irqrestore(&info->lock, flags);
3775 return info->irq_occurred;
3778 static int adapter_test(MGSLPC_INFO *info)
3780 if (!register_test(info)) {
3781 info->init_error = DiagStatus_AddressFailure;
3782 printk("%s(%d):Register test failure for device %s Addr=%04X\n",
3783 __FILE__, __LINE__, info->device_name, (unsigned short)(info->io_base));
3787 if (!irq_test(info)) {
3788 info->init_error = DiagStatus_IrqFailure;
3789 printk("%s(%d):Interrupt test failure for device %s IRQ=%d\n",
3790 __FILE__, __LINE__, info->device_name, (unsigned short)(info->irq_level));
3794 if (debug_level >= DEBUG_LEVEL_INFO)
3795 printk("%s(%d):device %s passed diagnostics\n",
3796 __FILE__, __LINE__, info->device_name);
3800 static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
3805 printk("%s tx data:\n", info->device_name);
3807 printk("%s rx data:\n", info->device_name);
3815 for(i=0;i<linecount;i++)
3816 printk("%02X ", (unsigned char)data[i]);
3819 for(i=0;i<linecount;i++) {
3820 if (data[i]>=040 && data[i]<=0176)
3821 printk("%c", data[i]);
3832 /* HDLC frame time out
3833 * update stats and do tx completion processing
3835 static void tx_timeout(struct timer_list *t)
3837 MGSLPC_INFO *info = from_timer(info, t, tx_timer);
3838 unsigned long flags;
3840 if (debug_level >= DEBUG_LEVEL_INFO)
3841 printk("%s(%d):tx_timeout(%s)\n",
3842 __FILE__, __LINE__, info->device_name);
3843 if (info->tx_active &&
3844 info->params.mode == MGSL_MODE_HDLC) {
3845 info->icount.txtimeout++;
3847 spin_lock_irqsave(&info->lock, flags);
3848 info->tx_active = false;
3849 info->tx_count = info->tx_put = info->tx_get = 0;
3851 spin_unlock_irqrestore(&info->lock, flags);
3853 #if SYNCLINK_GENERIC_HDLC
3855 hdlcdev_tx_done(info);
3859 struct tty_struct *tty = tty_port_tty_get(&info->port);
3860 bh_transmit(info, tty);
3865 #if SYNCLINK_GENERIC_HDLC
3868 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
3869 * set encoding and frame check sequence (FCS) options
3871 * dev pointer to network device structure
3872 * encoding serial encoding setting
3873 * parity FCS setting
3875 * returns 0 if success, otherwise error code
3877 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
3878 unsigned short parity)
3880 MGSLPC_INFO *info = dev_to_port(dev);
3881 struct tty_struct *tty;
3882 unsigned char new_encoding;
3883 unsigned short new_crctype;
3885 /* return error if TTY interface open */
3886 if (info->port.count)
3891 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
3892 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
3893 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
3894 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
3895 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
3896 default: return -EINVAL;
3901 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
3902 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
3903 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
3904 default: return -EINVAL;
3907 info->params.encoding = new_encoding;
3908 info->params.crc_type = new_crctype;
3910 /* if network interface up, reprogram hardware */
3911 if (info->netcount) {
3912 tty = tty_port_tty_get(&info->port);
3913 mgslpc_program_hw(info, tty);
3921 * called by generic HDLC layer to send frame
3923 * skb socket buffer containing HDLC frame
3924 * dev pointer to network device structure
3926 static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
3927 struct net_device *dev)
3929 MGSLPC_INFO *info = dev_to_port(dev);
3930 unsigned long flags;
3932 if (debug_level >= DEBUG_LEVEL_INFO)
3933 printk(KERN_INFO "%s:hdlc_xmit(%s)\n", __FILE__, dev->name);
3935 /* stop sending until this frame completes */
3936 netif_stop_queue(dev);
3938 /* copy data to device buffers */
3939 skb_copy_from_linear_data(skb, info->tx_buf, skb->len);
3941 info->tx_put = info->tx_count = skb->len;
3943 /* update network statistics */
3944 dev->stats.tx_packets++;
3945 dev->stats.tx_bytes += skb->len;
3947 /* done with socket buffer, so free it */
3950 /* save start time for transmit timeout detection */
3951 netif_trans_update(dev);
3953 /* start hardware transmitter if necessary */
3954 spin_lock_irqsave(&info->lock, flags);
3955 if (!info->tx_active) {
3956 struct tty_struct *tty = tty_port_tty_get(&info->port);
3957 tx_start(info, tty);
3960 spin_unlock_irqrestore(&info->lock, flags);
3962 return NETDEV_TX_OK;
3966 * called by network layer when interface enabled
3967 * claim resources and initialize hardware
3969 * dev pointer to network device structure
3971 * returns 0 if success, otherwise error code
3973 static int hdlcdev_open(struct net_device *dev)
3975 MGSLPC_INFO *info = dev_to_port(dev);
3976 struct tty_struct *tty;
3978 unsigned long flags;
3980 if (debug_level >= DEBUG_LEVEL_INFO)
3981 printk("%s:hdlcdev_open(%s)\n", __FILE__, dev->name);
3983 /* generic HDLC layer open processing */
3984 rc = hdlc_open(dev);
3988 /* arbitrate between network and tty opens */
3989 spin_lock_irqsave(&info->netlock, flags);
3990 if (info->port.count != 0 || info->netcount != 0) {
3991 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
3992 spin_unlock_irqrestore(&info->netlock, flags);
3996 spin_unlock_irqrestore(&info->netlock, flags);
3998 tty = tty_port_tty_get(&info->port);
3999 /* claim resources and init adapter */
4000 rc = startup(info, tty);
4003 spin_lock_irqsave(&info->netlock, flags);
4005 spin_unlock_irqrestore(&info->netlock, flags);
4008 /* assert RTS and DTR, apply hardware settings */
4009 info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
4010 mgslpc_program_hw(info, tty);
4013 /* enable network layer transmit */
4014 netif_trans_update(dev);
4015 netif_start_queue(dev);
4017 /* inform generic HDLC layer of current DCD status */
4018 spin_lock_irqsave(&info->lock, flags);
4020 spin_unlock_irqrestore(&info->lock, flags);
4021 if (info->serial_signals & SerialSignal_DCD)
4022 netif_carrier_on(dev);
4024 netif_carrier_off(dev);
4029 * called by network layer when interface is disabled
4030 * shutdown hardware and release resources
4032 * dev pointer to network device structure
4034 * returns 0 if success, otherwise error code
4036 static int hdlcdev_close(struct net_device *dev)
4038 MGSLPC_INFO *info = dev_to_port(dev);
4039 struct tty_struct *tty = tty_port_tty_get(&info->port);
4040 unsigned long flags;
4042 if (debug_level >= DEBUG_LEVEL_INFO)
4043 printk("%s:hdlcdev_close(%s)\n", __FILE__, dev->name);
4045 netif_stop_queue(dev);
4047 /* shutdown adapter and release resources */
4048 shutdown(info, tty);
4052 spin_lock_irqsave(&info->netlock, flags);
4054 spin_unlock_irqrestore(&info->netlock, flags);
4060 * called by network layer to process IOCTL call to network device
4062 * dev pointer to network device structure
4063 * ifr pointer to network interface request structure
4064 * cmd IOCTL command code
4066 * returns 0 if success, otherwise error code
4068 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
4070 const size_t size = sizeof(sync_serial_settings);
4071 sync_serial_settings new_line;
4072 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
4073 MGSLPC_INFO *info = dev_to_port(dev);
4076 if (debug_level >= DEBUG_LEVEL_INFO)
4077 printk("%s:hdlcdev_ioctl(%s)\n", __FILE__, dev->name);
4079 /* return error if TTY interface open */
4080 if (info->port.count)
4083 if (cmd != SIOCWANDEV)
4084 return hdlc_ioctl(dev, ifr, cmd);
4086 memset(&new_line, 0, size);
4088 switch(ifr->ifr_settings.type) {
4089 case IF_GET_IFACE: /* return current sync_serial_settings */
4091 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
4092 if (ifr->ifr_settings.size < size) {
4093 ifr->ifr_settings.size = size; /* data size wanted */
4097 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4098 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4099 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4100 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
4103 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
4104 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
4105 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
4106 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
4107 default: new_line.clock_type = CLOCK_DEFAULT;
4110 new_line.clock_rate = info->params.clock_speed;
4111 new_line.loopback = info->params.loopback ? 1:0;
4113 if (copy_to_user(line, &new_line, size))
4117 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
4119 if(!capable(CAP_NET_ADMIN))
4121 if (copy_from_user(&new_line, line, size))
4124 switch (new_line.clock_type)
4126 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
4127 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
4128 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
4129 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
4130 case CLOCK_DEFAULT: flags = info->params.flags &
4131 (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); break;
4135 default: return -EINVAL;
4138 if (new_line.loopback != 0 && new_line.loopback != 1)
4141 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4142 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4143 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4144 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
4145 info->params.flags |= flags;
4147 info->params.loopback = new_line.loopback;
4149 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
4150 info->params.clock_speed = new_line.clock_rate;
4152 info->params.clock_speed = 0;
4154 /* if network interface up, reprogram hardware */
4155 if (info->netcount) {
4156 struct tty_struct *tty = tty_port_tty_get(&info->port);
4157 mgslpc_program_hw(info, tty);
4163 return hdlc_ioctl(dev, ifr, cmd);
4168 * called by network layer when transmit timeout is detected
4170 * dev pointer to network device structure
4172 static void hdlcdev_tx_timeout(struct net_device *dev)
4174 MGSLPC_INFO *info = dev_to_port(dev);
4175 unsigned long flags;
4177 if (debug_level >= DEBUG_LEVEL_INFO)
4178 printk("hdlcdev_tx_timeout(%s)\n", dev->name);
4180 dev->stats.tx_errors++;
4181 dev->stats.tx_aborted_errors++;
4183 spin_lock_irqsave(&info->lock, flags);
4185 spin_unlock_irqrestore(&info->lock, flags);
4187 netif_wake_queue(dev);
4191 * called by device driver when transmit completes
4192 * reenable network layer transmit if stopped
4194 * info pointer to device instance information
4196 static void hdlcdev_tx_done(MGSLPC_INFO *info)
4198 if (netif_queue_stopped(info->netdev))
4199 netif_wake_queue(info->netdev);
4203 * called by device driver when frame received
4204 * pass frame to network layer
4206 * info pointer to device instance information
4207 * buf pointer to buffer contianing frame data
4208 * size count of data bytes in buf
4210 static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size)
4212 struct sk_buff *skb = dev_alloc_skb(size);
4213 struct net_device *dev = info->netdev;
4215 if (debug_level >= DEBUG_LEVEL_INFO)
4216 printk("hdlcdev_rx(%s)\n", dev->name);
4219 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
4220 dev->stats.rx_dropped++;
4224 skb_put_data(skb, buf, size);
4226 skb->protocol = hdlc_type_trans(skb, dev);
4228 dev->stats.rx_packets++;
4229 dev->stats.rx_bytes += size;
4234 static const struct net_device_ops hdlcdev_ops = {
4235 .ndo_open = hdlcdev_open,
4236 .ndo_stop = hdlcdev_close,
4237 .ndo_start_xmit = hdlc_start_xmit,
4238 .ndo_do_ioctl = hdlcdev_ioctl,
4239 .ndo_tx_timeout = hdlcdev_tx_timeout,
4243 * called by device driver when adding device instance
4244 * do generic HDLC initialization
4246 * info pointer to device instance information
4248 * returns 0 if success, otherwise error code
4250 static int hdlcdev_init(MGSLPC_INFO *info)
4253 struct net_device *dev;
4256 /* allocate and initialize network and HDLC layer objects */
4258 dev = alloc_hdlcdev(info);
4260 printk(KERN_ERR "%s:hdlc device allocation failure\n", __FILE__);
4264 /* for network layer reporting purposes only */
4265 dev->base_addr = info->io_base;
4266 dev->irq = info->irq_level;
4268 /* network layer callbacks and settings */
4269 dev->netdev_ops = &hdlcdev_ops;
4270 dev->watchdog_timeo = 10 * HZ;
4271 dev->tx_queue_len = 50;
4273 /* generic HDLC layer callbacks and settings */
4274 hdlc = dev_to_hdlc(dev);
4275 hdlc->attach = hdlcdev_attach;
4276 hdlc->xmit = hdlcdev_xmit;
4278 /* register objects with HDLC layer */
4279 rc = register_hdlc_device(dev);
4281 printk(KERN_WARNING "%s:unable to register hdlc device\n", __FILE__);
4291 * called by device driver when removing device instance
4292 * do generic HDLC cleanup
4294 * info pointer to device instance information
4296 static void hdlcdev_exit(MGSLPC_INFO *info)
4298 unregister_hdlc_device(info->netdev);
4299 free_netdev(info->netdev);
4300 info->netdev = NULL;
4303 #endif /* CONFIG_HDLC */