2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.26 2004/08/11 19:30:02 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/config.h>
39 #include <linux/module.h>
40 #include <linux/errno.h>
41 #include <linux/signal.h>
42 #include <linux/sched.h>
43 #include <linux/timer.h>
44 #include <linux/time.h>
45 #include <linux/interrupt.h>
46 #include <linux/pci.h>
47 #include <linux/tty.h>
48 #include <linux/tty_flip.h>
49 #include <linux/serial.h>
50 #include <linux/major.h>
51 #include <linux/string.h>
52 #include <linux/fcntl.h>
53 #include <linux/ptrace.h>
54 #include <linux/ioport.h>
56 #include <linux/slab.h>
57 #include <linux/netdevice.h>
58 #include <linux/vmalloc.h>
59 #include <linux/init.h>
60 #include <asm/serial.h>
61 #include <linux/delay.h>
62 #include <linux/ioctl.h>
64 #include <asm/system.h>
68 #include <linux/bitops.h>
69 #include <asm/types.h>
70 #include <linux/termios.h>
71 #include <linux/workqueue.h>
72 #include <linux/hdlc.h>
74 #include <pcmcia/version.h>
75 #include <pcmcia/cs_types.h>
76 #include <pcmcia/cs.h>
77 #include <pcmcia/cistpl.h>
78 #include <pcmcia/cisreg.h>
79 #include <pcmcia/ds.h>
81 #ifdef CONFIG_HDLC_MODULE
85 #define GET_USER(error,value,addr) error = get_user(value,addr)
86 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
87 #define PUT_USER(error,value,addr) error = put_user(value,addr)
88 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
90 #include <asm/uaccess.h>
92 #include "linux/synclink.h"
94 static MGSL_PARAMS default_params = {
95 MGSL_MODE_HDLC, /* unsigned long mode */
96 0, /* unsigned char loopback; */
97 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
98 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
99 0, /* unsigned long clock_speed; */
100 0xff, /* unsigned char addr_filter; */
101 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
102 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
103 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
104 9600, /* unsigned long data_rate; */
105 8, /* unsigned char data_bits; */
106 1, /* unsigned char stop_bits; */
107 ASYNC_PARITY_NONE /* unsigned char parity; */
113 unsigned char status;
117 /* The queue of BH actions to be performed */
120 #define BH_TRANSMIT 2
123 #define IO_PIN_SHUTDOWN_LIMIT 100
125 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
127 struct _input_signal_events {
140 * Device instance data structure
143 typedef struct _mgslpc_info {
144 void *if_ptr; /* General purpose pointer (used by SPPP) */
147 int count; /* count of opens */
149 unsigned short close_delay;
150 unsigned short closing_wait; /* time to wait before closing */
152 struct mgsl_icount icount;
154 struct tty_struct *tty;
156 int x_char; /* xon/xoff character */
157 int blocked_open; /* # of blocked opens */
158 unsigned char read_status_mask;
159 unsigned char ignore_status_mask;
161 unsigned char *tx_buf;
166 /* circular list of fixed length rx buffers */
168 unsigned char *rx_buf; /* memory allocated for all rx buffers */
169 int rx_buf_total_size; /* size of memory allocated for rx buffers */
170 int rx_put; /* index of next empty rx buffer */
171 int rx_get; /* index of next full rx buffer */
172 int rx_buf_size; /* size in bytes of single rx buffer */
173 int rx_buf_count; /* total number of rx buffers */
174 int rx_frame_count; /* number of full rx buffers */
176 wait_queue_head_t open_wait;
177 wait_queue_head_t close_wait;
179 wait_queue_head_t status_event_wait_q;
180 wait_queue_head_t event_wait_q;
181 struct timer_list tx_timer; /* HDLC transmit timeout timer */
182 struct _mgslpc_info *next_device; /* device list link */
184 unsigned short imra_value;
185 unsigned short imrb_value;
186 unsigned char pim_value;
189 struct work_struct task; /* task structure for scheduling bh */
198 int dcd_chkcount; /* check counts to prevent */
199 int cts_chkcount; /* too many IRQs if a signal */
200 int dsr_chkcount; /* is floating */
211 int if_mode; /* serial interface selection (RS-232, v.35 etc) */
213 char device_name[25]; /* device instance name */
215 unsigned int io_base; /* base I/O address of adapter */
216 unsigned int irq_level;
218 MGSL_PARAMS params; /* communications parameters */
220 unsigned char serial_signals; /* current serial signal states */
222 char irq_occurred; /* for diagnostics use */
224 unsigned int init_error; /* startup error (DIAGS) */
226 char flag_buf[MAX_ASYNC_BUFFER_SIZE];
227 BOOLEAN drop_rts_on_tx_done;
229 struct _input_signal_events input_signal_events;
236 /* SPPP/Cisco HDLC device parts */
242 struct net_device *netdev;
247 #define MGSLPC_MAGIC 0x5402
250 * The size of the serial xmit buffer is 1 page, or 4096 bytes
252 #define TXBUFSIZE 4096
255 #define CHA 0x00 /* channel A offset */
256 #define CHB 0x40 /* channel B offset */
259 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
306 #define IRQ_BREAK_ON BIT15 // rx break detected
307 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
308 #define IRQ_ALLSENT BIT13 // all sent
309 #define IRQ_UNDERRUN BIT12 // transmit data underrun
310 #define IRQ_TIMER BIT11 // timer interrupt
311 #define IRQ_CTS BIT10 // CTS status change
312 #define IRQ_TXREPEAT BIT9 // tx message repeat
313 #define IRQ_TXFIFO BIT8 // transmit pool ready
314 #define IRQ_RXEOM BIT7 // receive message end
315 #define IRQ_EXITHUNT BIT6 // receive frame start
316 #define IRQ_RXTIME BIT6 // rx char timeout
317 #define IRQ_DCD BIT2 // carrier detect status change
318 #define IRQ_OVERRUN BIT1 // receive frame overflow
319 #define IRQ_RXFIFO BIT0 // receive pool full
323 #define XFW BIT6 // transmit FIFO write enable
324 #define CEC BIT2 // command executing
325 #define CTS BIT1 // CTS state
330 #define PVR_AUTOCTS BIT3
331 #define PVR_RS232 0x20 /* 0010b */
332 #define PVR_V35 0xe0 /* 1110b */
333 #define PVR_RS422 0x40 /* 0100b */
335 /* Register access functions */
337 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
338 #define read_reg(info, reg) inb((info)->io_base + (reg))
340 #define read_reg16(info, reg) inw((info)->io_base + (reg))
341 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
343 #define set_reg_bits(info, reg, mask) \
344 write_reg(info, (reg), \
345 (unsigned char) (read_reg(info, (reg)) | (mask)))
346 #define clear_reg_bits(info, reg, mask) \
347 write_reg(info, (reg), \
348 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
350 * interrupt enable/disable routines
352 static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
354 if (channel == CHA) {
355 info->imra_value |= mask;
356 write_reg16(info, CHA + IMR, info->imra_value);
358 info->imrb_value |= mask;
359 write_reg16(info, CHB + IMR, info->imrb_value);
362 static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
364 if (channel == CHA) {
365 info->imra_value &= ~mask;
366 write_reg16(info, CHA + IMR, info->imra_value);
368 info->imrb_value &= ~mask;
369 write_reg16(info, CHB + IMR, info->imrb_value);
373 #define port_irq_disable(info, mask) \
374 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
376 #define port_irq_enable(info, mask) \
377 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
379 static void rx_start(MGSLPC_INFO *info);
380 static void rx_stop(MGSLPC_INFO *info);
382 static void tx_start(MGSLPC_INFO *info);
383 static void tx_stop(MGSLPC_INFO *info);
384 static void tx_set_idle(MGSLPC_INFO *info);
386 static void get_signals(MGSLPC_INFO *info);
387 static void set_signals(MGSLPC_INFO *info);
389 static void reset_device(MGSLPC_INFO *info);
391 static void hdlc_mode(MGSLPC_INFO *info);
392 static void async_mode(MGSLPC_INFO *info);
394 static void tx_timeout(unsigned long context);
396 static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg);
399 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
400 static void hdlcdev_tx_done(MGSLPC_INFO *info);
401 static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size);
402 static int hdlcdev_init(MGSLPC_INFO *info);
403 static void hdlcdev_exit(MGSLPC_INFO *info);
406 static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit);
408 static BOOLEAN register_test(MGSLPC_INFO *info);
409 static BOOLEAN irq_test(MGSLPC_INFO *info);
410 static int adapter_test(MGSLPC_INFO *info);
412 static int claim_resources(MGSLPC_INFO *info);
413 static void release_resources(MGSLPC_INFO *info);
414 static void mgslpc_add_device(MGSLPC_INFO *info);
415 static void mgslpc_remove_device(MGSLPC_INFO *info);
417 static int rx_get_frame(MGSLPC_INFO *info);
418 static void rx_reset_buffers(MGSLPC_INFO *info);
419 static int rx_alloc_buffers(MGSLPC_INFO *info);
420 static void rx_free_buffers(MGSLPC_INFO *info);
422 static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs);
425 * Bottom half interrupt handlers
427 static void bh_handler(void* Context);
428 static void bh_transmit(MGSLPC_INFO *info);
429 static void bh_status(MGSLPC_INFO *info);
434 static int tiocmget(struct tty_struct *tty, struct file *file);
435 static int tiocmset(struct tty_struct *tty, struct file *file,
436 unsigned int set, unsigned int clear);
437 static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount);
438 static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params);
439 static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params);
440 static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode);
441 static int set_txidle(MGSLPC_INFO *info, int idle_mode);
442 static int set_txenable(MGSLPC_INFO *info, int enable);
443 static int tx_abort(MGSLPC_INFO *info);
444 static int set_rxenable(MGSLPC_INFO *info, int enable);
445 static int wait_events(MGSLPC_INFO *info, int __user *mask);
447 static MGSLPC_INFO *mgslpc_device_list = NULL;
448 static int mgslpc_device_count = 0;
451 * Set this param to non-zero to load eax with the
452 * .text section address and breakpoint on module load.
453 * This is useful for use with gdb and add-symbol-file command.
455 static int break_on_load=0;
458 * Driver major number, defaults to zero to get auto
459 * assigned major number. May be forced as module parameter.
461 static int ttymajor=0;
463 static int debug_level = 0;
464 static int maxframe[MAX_DEVICE_COUNT] = {0,};
465 static int dosyncppp[MAX_DEVICE_COUNT] = {1,1,1,1};
467 module_param(break_on_load, bool, 0);
468 module_param(ttymajor, int, 0);
469 module_param(debug_level, int, 0);
470 module_param_array(maxframe, int, NULL, 0);
471 module_param_array(dosyncppp, int, NULL, 0);
473 MODULE_LICENSE("GPL");
475 static char *driver_name = "SyncLink PC Card driver";
476 static char *driver_version = "$Revision: 4.26 $";
478 static struct tty_driver *serial_driver;
480 /* number of characters left in xmit buffer before we ask for more */
481 #define WAKEUP_CHARS 256
483 static void mgslpc_change_params(MGSLPC_INFO *info);
484 static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
486 /* PCMCIA prototypes */
488 static void mgslpc_config(dev_link_t *link);
489 static void mgslpc_release(u_long arg);
490 static int mgslpc_event(event_t event, int priority,
491 event_callback_args_t *args);
492 static dev_link_t *mgslpc_attach(void);
493 static void mgslpc_detach(dev_link_t *);
495 static dev_info_t dev_info = "synclink_cs";
496 static dev_link_t *dev_list = NULL;
499 * 1st function defined in .text section. Calling this function in
500 * init_module() followed by a breakpoint allows a remote debugger
501 * (gdb) to get the .text address for the add-symbol-file command.
502 * This allows remote debugging of dynamically loadable modules.
504 static void* mgslpc_get_text_ptr(void)
506 return mgslpc_get_text_ptr;
510 * line discipline callback wrappers
512 * The wrappers maintain line discipline references
513 * while calling into the line discipline.
515 * ldisc_flush_buffer - flush line discipline receive buffers
516 * ldisc_receive_buf - pass receive data to line discipline
519 static void ldisc_flush_buffer(struct tty_struct *tty)
521 struct tty_ldisc *ld = tty_ldisc_ref(tty);
523 if (ld->flush_buffer)
524 ld->flush_buffer(tty);
529 static void ldisc_receive_buf(struct tty_struct *tty,
530 const __u8 *data, char *flags, int count)
532 struct tty_ldisc *ld;
535 ld = tty_ldisc_ref(tty);
538 ld->receive_buf(tty, data, flags, count);
543 static dev_link_t *mgslpc_attach(void)
547 client_reg_t client_reg;
550 if (debug_level >= DEBUG_LEVEL_INFO)
551 printk("mgslpc_attach\n");
553 info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
555 printk("Error can't allocate device instance data\n");
559 memset(info, 0, sizeof(MGSLPC_INFO));
560 info->magic = MGSLPC_MAGIC;
561 INIT_WORK(&info->task, bh_handler, info);
562 info->max_frame_size = 4096;
563 info->close_delay = 5*HZ/10;
565 info->closing_wait = 30*HZ;
567 info->closing_wait = 65534;
569 init_waitqueue_head(&info->open_wait);
570 init_waitqueue_head(&info->close_wait);
571 init_waitqueue_head(&info->status_event_wait_q);
572 init_waitqueue_head(&info->event_wait_q);
573 spin_lock_init(&info->lock);
574 spin_lock_init(&info->netlock);
575 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
576 info->idle_mode = HDLC_TXIDLE_FLAGS;
577 info->imra_value = 0xffff;
578 info->imrb_value = 0xffff;
579 info->pim_value = 0xff;
584 /* Initialize the dev_link_t structure */
586 /* Interrupt setup */
587 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
588 link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
589 link->irq.Handler = NULL;
591 link->conf.Attributes = 0;
593 link->conf.IntType = INT_MEMORY_AND_IO;
595 /* Register with Card Services */
596 link->next = dev_list;
599 client_reg.dev_info = &dev_info;
600 client_reg.EventMask =
601 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
602 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
603 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
604 client_reg.event_handler = &mgslpc_event;
605 client_reg.Version = 0x0210;
606 client_reg.event_callback_args.client_data = link;
608 ret = pcmcia_register_client(&link->handle, &client_reg);
609 if (ret != CS_SUCCESS) {
610 cs_error(link->handle, RegisterClient, ret);
615 mgslpc_add_device(info);
620 /* Card has been inserted.
623 #define CS_CHECK(fn, ret) \
624 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
626 static void mgslpc_config(dev_link_t *link)
628 client_handle_t handle = link->handle;
629 MGSLPC_INFO *info = link->priv;
632 int last_fn, last_ret;
635 cistpl_cftable_entry_t dflt = { 0 };
636 cistpl_cftable_entry_t *cfg;
638 if (debug_level >= DEBUG_LEVEL_INFO)
639 printk("mgslpc_config(0x%p)\n", link);
641 /* read CONFIG tuple to find its configuration registers */
642 tuple.DesiredTuple = CISTPL_CONFIG;
643 tuple.Attributes = 0;
644 tuple.TupleData = buf;
645 tuple.TupleDataMax = sizeof(buf);
646 tuple.TupleOffset = 0;
647 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
648 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
649 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
650 link->conf.ConfigBase = parse.config.base;
651 link->conf.Present = parse.config.rmask[0];
654 link->state |= DEV_CONFIG;
656 /* Look up the current Vcc */
657 CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
658 link->conf.Vcc = conf.Vcc;
660 /* get CIS configuration entry */
662 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
663 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
665 cfg = &(parse.cftable_entry);
666 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
667 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
669 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
673 link->conf.ConfigIndex = cfg->index;
674 link->conf.Attributes |= CONF_ENABLE_IRQ;
676 /* IO window settings */
677 link->io.NumPorts1 = 0;
678 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
679 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
680 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
681 if (!(io->flags & CISTPL_IO_8BIT))
682 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
683 if (!(io->flags & CISTPL_IO_16BIT))
684 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
685 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
686 link->io.BasePort1 = io->win[0].base;
687 link->io.NumPorts1 = io->win[0].len;
688 CS_CHECK(RequestIO, pcmcia_request_io(link->handle, &link->io));
691 link->conf.Attributes = CONF_ENABLE_IRQ;
693 link->conf.IntType = INT_MEMORY_AND_IO;
694 link->conf.ConfigIndex = 8;
695 link->conf.Present = PRESENT_OPTION;
697 link->irq.Attributes |= IRQ_HANDLE_PRESENT;
698 link->irq.Handler = mgslpc_isr;
699 link->irq.Instance = info;
700 CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
702 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
704 info->io_base = link->io.BasePort1;
705 info->irq_level = link->irq.AssignedIRQ;
707 /* add to linked list of devices */
708 sprintf(info->node.dev_name, "mgslpc0");
709 info->node.major = info->node.minor = 0;
710 link->dev = &info->node;
712 printk(KERN_INFO "%s: index 0x%02x:",
713 info->node.dev_name, link->conf.ConfigIndex);
714 if (link->conf.Attributes & CONF_ENABLE_IRQ)
715 printk(", irq %d", link->irq.AssignedIRQ);
716 if (link->io.NumPorts1)
717 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
718 link->io.BasePort1+link->io.NumPorts1-1);
721 link->state &= ~DEV_CONFIG_PENDING;
725 cs_error(link->handle, last_fn, last_ret);
726 mgslpc_release((u_long)link);
729 /* Card has been removed.
730 * Unregister device and release PCMCIA configuration.
731 * If device is open, postpone until it is closed.
733 static void mgslpc_release(u_long arg)
735 dev_link_t *link = (dev_link_t *)arg;
737 if (debug_level >= DEBUG_LEVEL_INFO)
738 printk("mgslpc_release(0x%p)\n", link);
740 /* Unlink the device chain */
742 link->state &= ~DEV_CONFIG;
744 pcmcia_release_configuration(link->handle);
745 if (link->io.NumPorts1)
746 pcmcia_release_io(link->handle, &link->io);
747 if (link->irq.AssignedIRQ)
748 pcmcia_release_irq(link->handle, &link->irq);
749 if (link->state & DEV_STALE_LINK)
753 static void mgslpc_detach(dev_link_t *link)
757 if (debug_level >= DEBUG_LEVEL_INFO)
758 printk("mgslpc_detach(0x%p)\n", link);
761 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
762 if (*linkp == link) break;
766 if (link->state & DEV_CONFIG) {
767 /* device is configured/active, mark it so when
768 * release() is called a proper detach() occurs.
770 if (debug_level >= DEBUG_LEVEL_INFO)
771 printk(KERN_DEBUG "synclinkpc: detach postponed, '%s' "
772 "still locked\n", link->dev->dev_name);
773 link->state |= DEV_STALE_LINK;
777 /* Break the link with Card Services */
779 pcmcia_deregister_client(link->handle);
781 /* Unlink device structure, and free it */
783 mgslpc_remove_device((MGSLPC_INFO *)link->priv);
786 static int mgslpc_event(event_t event, int priority,
787 event_callback_args_t *args)
789 dev_link_t *link = args->client_data;
790 MGSLPC_INFO *info = link->priv;
792 if (debug_level >= DEBUG_LEVEL_INFO)
793 printk("mgslpc_event(0x%06x)\n", event);
796 case CS_EVENT_CARD_REMOVAL:
797 link->state &= ~DEV_PRESENT;
798 if (link->state & DEV_CONFIG) {
799 ((MGSLPC_INFO *)link->priv)->stop = 1;
800 mgslpc_release((u_long)link);
803 case CS_EVENT_CARD_INSERTION:
804 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
807 case CS_EVENT_PM_SUSPEND:
808 link->state |= DEV_SUSPEND;
809 /* Fall through... */
810 case CS_EVENT_RESET_PHYSICAL:
811 /* Mark the device as stopped, to block IO until later */
813 if (link->state & DEV_CONFIG)
814 pcmcia_release_configuration(link->handle);
816 case CS_EVENT_PM_RESUME:
817 link->state &= ~DEV_SUSPEND;
818 /* Fall through... */
819 case CS_EVENT_CARD_RESET:
820 if (link->state & DEV_CONFIG)
821 pcmcia_request_configuration(link->handle, &link->conf);
828 static inline int mgslpc_paranoia_check(MGSLPC_INFO *info,
829 char *name, const char *routine)
831 #ifdef MGSLPC_PARANOIA_CHECK
832 static const char *badmagic =
833 "Warning: bad magic number for mgsl struct (%s) in %s\n";
834 static const char *badinfo =
835 "Warning: null mgslpc_info for (%s) in %s\n";
838 printk(badinfo, name, routine);
841 if (info->magic != MGSLPC_MAGIC) {
842 printk(badmagic, name, routine);
853 #define CMD_RXFIFO BIT7 // release current rx FIFO
854 #define CMD_RXRESET BIT6 // receiver reset
855 #define CMD_RXFIFO_READ BIT5
856 #define CMD_START_TIMER BIT4
857 #define CMD_TXFIFO BIT3 // release current tx FIFO
858 #define CMD_TXEOM BIT1 // transmit end message
859 #define CMD_TXRESET BIT0 // transmit reset
861 static BOOLEAN wait_command_complete(MGSLPC_INFO *info, unsigned char channel)
864 /* wait for command completion */
865 while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) {
873 static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd)
875 wait_command_complete(info, channel);
876 write_reg(info, (unsigned char) (channel + CMDR), cmd);
879 static void tx_pause(struct tty_struct *tty)
881 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
884 if (mgslpc_paranoia_check(info, tty->name, "tx_pause"))
886 if (debug_level >= DEBUG_LEVEL_INFO)
887 printk("tx_pause(%s)\n",info->device_name);
889 spin_lock_irqsave(&info->lock,flags);
890 if (info->tx_enabled)
892 spin_unlock_irqrestore(&info->lock,flags);
895 static void tx_release(struct tty_struct *tty)
897 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
900 if (mgslpc_paranoia_check(info, tty->name, "tx_release"))
902 if (debug_level >= DEBUG_LEVEL_INFO)
903 printk("tx_release(%s)\n",info->device_name);
905 spin_lock_irqsave(&info->lock,flags);
906 if (!info->tx_enabled)
908 spin_unlock_irqrestore(&info->lock,flags);
911 /* Return next bottom half action to perform.
912 * or 0 if nothing to do.
914 static int bh_action(MGSLPC_INFO *info)
919 spin_lock_irqsave(&info->lock,flags);
921 if (info->pending_bh & BH_RECEIVE) {
922 info->pending_bh &= ~BH_RECEIVE;
924 } else if (info->pending_bh & BH_TRANSMIT) {
925 info->pending_bh &= ~BH_TRANSMIT;
927 } else if (info->pending_bh & BH_STATUS) {
928 info->pending_bh &= ~BH_STATUS;
933 /* Mark BH routine as complete */
934 info->bh_running = 0;
935 info->bh_requested = 0;
938 spin_unlock_irqrestore(&info->lock,flags);
943 void bh_handler(void* Context)
945 MGSLPC_INFO *info = (MGSLPC_INFO*)Context;
951 if (debug_level >= DEBUG_LEVEL_BH)
952 printk( "%s(%d):bh_handler(%s) entry\n",
953 __FILE__,__LINE__,info->device_name);
955 info->bh_running = 1;
957 while((action = bh_action(info)) != 0) {
959 /* Process work item */
960 if ( debug_level >= DEBUG_LEVEL_BH )
961 printk( "%s(%d):bh_handler() work item action=%d\n",
962 __FILE__,__LINE__,action);
967 while(rx_get_frame(info));
976 /* unknown work item ID */
977 printk("Unknown work item ID=%08X!\n", action);
982 if (debug_level >= DEBUG_LEVEL_BH)
983 printk( "%s(%d):bh_handler(%s) exit\n",
984 __FILE__,__LINE__,info->device_name);
987 void bh_transmit(MGSLPC_INFO *info)
989 struct tty_struct *tty = info->tty;
990 if (debug_level >= DEBUG_LEVEL_BH)
991 printk("bh_transmit() entry on %s\n", info->device_name);
995 wake_up_interruptible(&tty->write_wait);
999 void bh_status(MGSLPC_INFO *info)
1001 info->ri_chkcount = 0;
1002 info->dsr_chkcount = 0;
1003 info->dcd_chkcount = 0;
1004 info->cts_chkcount = 0;
1007 /* eom: non-zero = end of frame */
1008 static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
1010 unsigned char data[2];
1011 unsigned char fifo_count, read_count, i;
1012 RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size));
1014 if (debug_level >= DEBUG_LEVEL_ISR)
1015 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom);
1017 if (!info->rx_enabled)
1020 if (info->rx_frame_count >= info->rx_buf_count) {
1021 /* no more free buffers */
1022 issue_command(info, CHA, CMD_RXRESET);
1023 info->pending_bh |= BH_RECEIVE;
1024 info->rx_overflow = 1;
1025 info->icount.buf_overrun++;
1030 /* end of frame, get FIFO count from RBCL register */
1031 if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f)))
1037 if (fifo_count == 1) {
1039 data[0] = read_reg(info, CHA + RXFIFO);
1042 *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO);
1044 fifo_count -= read_count;
1045 if (!fifo_count && eom)
1046 buf->status = data[--read_count];
1048 for (i = 0; i < read_count; i++) {
1049 if (buf->count >= info->max_frame_size) {
1050 /* frame too large, reset receiver and reset current buffer */
1051 issue_command(info, CHA, CMD_RXRESET);
1055 *(buf->data + buf->count) = data[i];
1058 } while (fifo_count);
1061 info->pending_bh |= BH_RECEIVE;
1062 info->rx_frame_count++;
1064 if (info->rx_put >= info->rx_buf_count)
1067 issue_command(info, CHA, CMD_RXFIFO);
1070 static void rx_ready_async(MGSLPC_INFO *info, int tcd)
1072 unsigned char data, status;
1074 struct tty_struct *tty = info->tty;
1075 struct mgsl_icount *icount = &info->icount;
1078 /* early termination, get FIFO count from RBCL register */
1079 fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
1081 /* Zero fifo count could mean 0 or 32 bytes available.
1082 * If BIT5 of STAR is set then at least 1 byte is available.
1084 if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5))
1089 /* Flush received async data to receive data buffer. */
1090 while (fifo_count) {
1091 data = read_reg(info, CHA + RXFIFO);
1092 status = read_reg(info, CHA + RXFIFO);
1095 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
1098 *tty->flip.char_buf_ptr = data;
1101 *tty->flip.flag_buf_ptr = 0;
1103 // if no frameing/crc error then save data
1104 // BIT7:parity error
1105 // BIT6:framing error
1107 if (status & (BIT7 + BIT6)) {
1113 /* discard char if tty control flags say so */
1114 if (status & info->ignore_status_mask)
1117 status &= info->read_status_mask;
1120 *tty->flip.flag_buf_ptr = TTY_PARITY;
1121 else if (status & BIT6)
1122 *tty->flip.flag_buf_ptr = TTY_FRAME;
1125 tty->flip.flag_buf_ptr++;
1126 tty->flip.char_buf_ptr++;
1129 issue_command(info, CHA, CMD_RXFIFO);
1131 if (debug_level >= DEBUG_LEVEL_ISR) {
1132 printk("%s(%d):rx_ready_async count=%d\n",
1133 __FILE__,__LINE__,tty->flip.count);
1134 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1135 __FILE__,__LINE__,icount->rx,icount->brk,
1136 icount->parity,icount->frame,icount->overrun);
1139 if (tty->flip.count)
1140 tty_flip_buffer_push(tty);
1144 static void tx_done(MGSLPC_INFO *info)
1146 if (!info->tx_active)
1149 info->tx_active = 0;
1150 info->tx_aborting = 0;
1152 if (info->params.mode == MGSL_MODE_ASYNC)
1155 info->tx_count = info->tx_put = info->tx_get = 0;
1156 del_timer(&info->tx_timer);
1158 if (info->drop_rts_on_tx_done) {
1160 if (info->serial_signals & SerialSignal_RTS) {
1161 info->serial_signals &= ~SerialSignal_RTS;
1164 info->drop_rts_on_tx_done = 0;
1169 hdlcdev_tx_done(info);
1173 if (info->tty->stopped || info->tty->hw_stopped) {
1177 info->pending_bh |= BH_TRANSMIT;
1181 static void tx_ready(MGSLPC_INFO *info)
1183 unsigned char fifo_count = 32;
1186 if (debug_level >= DEBUG_LEVEL_ISR)
1187 printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name);
1189 if (info->params.mode == MGSL_MODE_HDLC) {
1190 if (!info->tx_active)
1193 if (info->tty->stopped || info->tty->hw_stopped) {
1197 if (!info->tx_count)
1198 info->tx_active = 0;
1201 if (!info->tx_count)
1204 while (info->tx_count && fifo_count) {
1205 c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get)));
1208 write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get));
1210 write_reg16(info, CHA + TXFIFO,
1211 *((unsigned short*)(info->tx_buf + info->tx_get)));
1213 info->tx_count -= c;
1214 info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1);
1218 if (info->params.mode == MGSL_MODE_ASYNC) {
1219 if (info->tx_count < WAKEUP_CHARS)
1220 info->pending_bh |= BH_TRANSMIT;
1221 issue_command(info, CHA, CMD_TXFIFO);
1224 issue_command(info, CHA, CMD_TXFIFO);
1226 issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM);
1230 static void cts_change(MGSLPC_INFO *info)
1233 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1234 irq_disable(info, CHB, IRQ_CTS);
1236 if (info->serial_signals & SerialSignal_CTS)
1237 info->input_signal_events.cts_up++;
1239 info->input_signal_events.cts_down++;
1240 wake_up_interruptible(&info->status_event_wait_q);
1241 wake_up_interruptible(&info->event_wait_q);
1243 if (info->flags & ASYNC_CTS_FLOW) {
1244 if (info->tty->hw_stopped) {
1245 if (info->serial_signals & SerialSignal_CTS) {
1246 if (debug_level >= DEBUG_LEVEL_ISR)
1247 printk("CTS tx start...");
1249 info->tty->hw_stopped = 0;
1251 info->pending_bh |= BH_TRANSMIT;
1255 if (!(info->serial_signals & SerialSignal_CTS)) {
1256 if (debug_level >= DEBUG_LEVEL_ISR)
1257 printk("CTS tx stop...");
1259 info->tty->hw_stopped = 1;
1264 info->pending_bh |= BH_STATUS;
1267 static void dcd_change(MGSLPC_INFO *info)
1270 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1271 irq_disable(info, CHB, IRQ_DCD);
1273 if (info->serial_signals & SerialSignal_DCD) {
1274 info->input_signal_events.dcd_up++;
1277 info->input_signal_events.dcd_down++;
1280 hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, info->netdev);
1282 wake_up_interruptible(&info->status_event_wait_q);
1283 wake_up_interruptible(&info->event_wait_q);
1285 if (info->flags & ASYNC_CHECK_CD) {
1286 if (debug_level >= DEBUG_LEVEL_ISR)
1287 printk("%s CD now %s...", info->device_name,
1288 (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
1289 if (info->serial_signals & SerialSignal_DCD)
1290 wake_up_interruptible(&info->open_wait);
1292 if (debug_level >= DEBUG_LEVEL_ISR)
1293 printk("doing serial hangup...");
1295 tty_hangup(info->tty);
1298 info->pending_bh |= BH_STATUS;
1301 static void dsr_change(MGSLPC_INFO *info)
1304 if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1305 port_irq_disable(info, PVR_DSR);
1307 if (info->serial_signals & SerialSignal_DSR)
1308 info->input_signal_events.dsr_up++;
1310 info->input_signal_events.dsr_down++;
1311 wake_up_interruptible(&info->status_event_wait_q);
1312 wake_up_interruptible(&info->event_wait_q);
1313 info->pending_bh |= BH_STATUS;
1316 static void ri_change(MGSLPC_INFO *info)
1319 if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1320 port_irq_disable(info, PVR_RI);
1322 if (info->serial_signals & SerialSignal_RI)
1323 info->input_signal_events.ri_up++;
1325 info->input_signal_events.ri_down++;
1326 wake_up_interruptible(&info->status_event_wait_q);
1327 wake_up_interruptible(&info->event_wait_q);
1328 info->pending_bh |= BH_STATUS;
1331 /* Interrupt service routine entry point.
1335 * irq interrupt number that caused interrupt
1336 * dev_id device ID supplied during interrupt registration
1337 * regs interrupted processor context
1339 static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs)
1341 MGSLPC_INFO * info = (MGSLPC_INFO *)dev_id;
1343 unsigned char gis, pis;
1346 if (debug_level >= DEBUG_LEVEL_ISR)
1347 printk("mgslpc_isr(%d) entry.\n", irq);
1351 if (!(info->link.state & DEV_CONFIG))
1354 spin_lock(&info->lock);
1356 while ((gis = read_reg(info, CHA + GIS))) {
1357 if (debug_level >= DEBUG_LEVEL_ISR)
1358 printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis);
1360 if ((gis & 0x70) || count > 1000) {
1361 printk("synclink_cs:hardware failed or ejected\n");
1366 if (gis & (BIT1 + BIT0)) {
1367 isr = read_reg16(info, CHB + ISR);
1373 if (gis & (BIT3 + BIT2))
1375 isr = read_reg16(info, CHA + ISR);
1376 if (isr & IRQ_TIMER) {
1377 info->irq_occurred = 1;
1378 irq_disable(info, CHA, IRQ_TIMER);
1382 if (isr & IRQ_EXITHUNT) {
1383 info->icount.exithunt++;
1384 wake_up_interruptible(&info->event_wait_q);
1386 if (isr & IRQ_BREAK_ON) {
1388 if (info->flags & ASYNC_SAK)
1391 if (isr & IRQ_RXTIME) {
1392 issue_command(info, CHA, CMD_RXFIFO_READ);
1394 if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) {
1395 if (info->params.mode == MGSL_MODE_HDLC)
1396 rx_ready_hdlc(info, isr & IRQ_RXEOM);
1398 rx_ready_async(info, isr & IRQ_RXEOM);
1402 if (isr & IRQ_UNDERRUN) {
1403 if (info->tx_aborting)
1404 info->icount.txabort++;
1406 info->icount.txunder++;
1409 else if (isr & IRQ_ALLSENT) {
1410 info->icount.txok++;
1413 else if (isr & IRQ_TXFIFO)
1417 pis = read_reg(info, CHA + PIS);
1425 /* Request bottom half processing if there's something
1426 * for it to do and the bh is not already running
1429 if (info->pending_bh && !info->bh_running && !info->bh_requested) {
1430 if ( debug_level >= DEBUG_LEVEL_ISR )
1431 printk("%s(%d):%s queueing bh task.\n",
1432 __FILE__,__LINE__,info->device_name);
1433 schedule_work(&info->task);
1434 info->bh_requested = 1;
1437 spin_unlock(&info->lock);
1439 if (debug_level >= DEBUG_LEVEL_ISR)
1440 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1441 __FILE__,__LINE__,irq);
1446 /* Initialize and start device.
1448 static int startup(MGSLPC_INFO * info)
1452 if (debug_level >= DEBUG_LEVEL_INFO)
1453 printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name);
1455 if (info->flags & ASYNC_INITIALIZED)
1458 if (!info->tx_buf) {
1459 /* allocate a page of memory for a transmit buffer */
1460 info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
1461 if (!info->tx_buf) {
1462 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
1463 __FILE__,__LINE__,info->device_name);
1468 info->pending_bh = 0;
1470 init_timer(&info->tx_timer);
1471 info->tx_timer.data = (unsigned long)info;
1472 info->tx_timer.function = tx_timeout;
1474 /* Allocate and claim adapter resources */
1475 retval = claim_resources(info);
1477 /* perform existance check and diagnostics */
1479 retval = adapter_test(info);
1482 if (capable(CAP_SYS_ADMIN) && info->tty)
1483 set_bit(TTY_IO_ERROR, &info->tty->flags);
1484 release_resources(info);
1488 /* program hardware for current parameters */
1489 mgslpc_change_params(info);
1492 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1494 info->flags |= ASYNC_INITIALIZED;
1499 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1501 static void shutdown(MGSLPC_INFO * info)
1503 unsigned long flags;
1505 if (!(info->flags & ASYNC_INITIALIZED))
1508 if (debug_level >= DEBUG_LEVEL_INFO)
1509 printk("%s(%d):mgslpc_shutdown(%s)\n",
1510 __FILE__,__LINE__, info->device_name );
1512 /* clear status wait queue because status changes */
1513 /* can't happen after shutting down the hardware */
1514 wake_up_interruptible(&info->status_event_wait_q);
1515 wake_up_interruptible(&info->event_wait_q);
1517 del_timer(&info->tx_timer);
1520 free_page((unsigned long) info->tx_buf);
1521 info->tx_buf = NULL;
1524 spin_lock_irqsave(&info->lock,flags);
1529 /* TODO:disable interrupts instead of reset to preserve signal states */
1532 if (!info->tty || info->tty->termios->c_cflag & HUPCL) {
1533 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
1537 spin_unlock_irqrestore(&info->lock,flags);
1539 release_resources(info);
1542 set_bit(TTY_IO_ERROR, &info->tty->flags);
1544 info->flags &= ~ASYNC_INITIALIZED;
1547 static void mgslpc_program_hw(MGSLPC_INFO *info)
1549 unsigned long flags;
1551 spin_lock_irqsave(&info->lock,flags);
1555 info->tx_count = info->tx_put = info->tx_get = 0;
1557 if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
1564 info->dcd_chkcount = 0;
1565 info->cts_chkcount = 0;
1566 info->ri_chkcount = 0;
1567 info->dsr_chkcount = 0;
1569 irq_enable(info, CHB, IRQ_DCD | IRQ_CTS);
1570 port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
1573 if (info->netcount || info->tty->termios->c_cflag & CREAD)
1576 spin_unlock_irqrestore(&info->lock,flags);
1579 /* Reconfigure adapter based on new parameters
1581 static void mgslpc_change_params(MGSLPC_INFO *info)
1586 if (!info->tty || !info->tty->termios)
1589 if (debug_level >= DEBUG_LEVEL_INFO)
1590 printk("%s(%d):mgslpc_change_params(%s)\n",
1591 __FILE__,__LINE__, info->device_name );
1593 cflag = info->tty->termios->c_cflag;
1595 /* if B0 rate (hangup) specified then negate DTR and RTS */
1596 /* otherwise assert DTR and RTS */
1598 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
1600 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
1602 /* byte size and parity */
1604 switch (cflag & CSIZE) {
1605 case CS5: info->params.data_bits = 5; break;
1606 case CS6: info->params.data_bits = 6; break;
1607 case CS7: info->params.data_bits = 7; break;
1608 case CS8: info->params.data_bits = 8; break;
1609 default: info->params.data_bits = 7; break;
1613 info->params.stop_bits = 2;
1615 info->params.stop_bits = 1;
1617 info->params.parity = ASYNC_PARITY_NONE;
1618 if (cflag & PARENB) {
1620 info->params.parity = ASYNC_PARITY_ODD;
1622 info->params.parity = ASYNC_PARITY_EVEN;
1625 info->params.parity = ASYNC_PARITY_SPACE;
1629 /* calculate number of jiffies to transmit a full
1630 * FIFO (32 bytes) at specified data rate
1632 bits_per_char = info->params.data_bits +
1633 info->params.stop_bits + 1;
1635 /* if port data rate is set to 460800 or less then
1636 * allow tty settings to override, otherwise keep the
1637 * current data rate.
1639 if (info->params.data_rate <= 460800) {
1640 info->params.data_rate = tty_get_baud_rate(info->tty);
1643 if ( info->params.data_rate ) {
1644 info->timeout = (32*HZ*bits_per_char) /
1645 info->params.data_rate;
1647 info->timeout += HZ/50; /* Add .02 seconds of slop */
1649 if (cflag & CRTSCTS)
1650 info->flags |= ASYNC_CTS_FLOW;
1652 info->flags &= ~ASYNC_CTS_FLOW;
1655 info->flags &= ~ASYNC_CHECK_CD;
1657 info->flags |= ASYNC_CHECK_CD;
1659 /* process tty input control flags */
1661 info->read_status_mask = 0;
1662 if (I_INPCK(info->tty))
1663 info->read_status_mask |= BIT7 | BIT6;
1664 if (I_IGNPAR(info->tty))
1665 info->ignore_status_mask |= BIT7 | BIT6;
1667 mgslpc_program_hw(info);
1670 /* Add a character to the transmit buffer
1672 static void mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
1674 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1675 unsigned long flags;
1677 if (debug_level >= DEBUG_LEVEL_INFO) {
1678 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1679 __FILE__,__LINE__,ch,info->device_name);
1682 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char"))
1685 if (!tty || !info->tx_buf)
1688 spin_lock_irqsave(&info->lock,flags);
1690 if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) {
1691 if (info->tx_count < TXBUFSIZE - 1) {
1692 info->tx_buf[info->tx_put++] = ch;
1693 info->tx_put &= TXBUFSIZE-1;
1698 spin_unlock_irqrestore(&info->lock,flags);
1701 /* Enable transmitter so remaining characters in the
1702 * transmit buffer are sent.
1704 static void mgslpc_flush_chars(struct tty_struct *tty)
1706 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1707 unsigned long flags;
1709 if (debug_level >= DEBUG_LEVEL_INFO)
1710 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1711 __FILE__,__LINE__,info->device_name,info->tx_count);
1713 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars"))
1716 if (info->tx_count <= 0 || tty->stopped ||
1717 tty->hw_stopped || !info->tx_buf)
1720 if (debug_level >= DEBUG_LEVEL_INFO)
1721 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1722 __FILE__,__LINE__,info->device_name);
1724 spin_lock_irqsave(&info->lock,flags);
1725 if (!info->tx_active)
1727 spin_unlock_irqrestore(&info->lock,flags);
1730 /* Send a block of data
1734 * tty pointer to tty information structure
1735 * buf pointer to buffer containing send data
1736 * count size of send data in bytes
1738 * Returns: number of characters written
1740 static int mgslpc_write(struct tty_struct * tty,
1741 const unsigned char *buf, int count)
1744 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1745 unsigned long flags;
1747 if (debug_level >= DEBUG_LEVEL_INFO)
1748 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1749 __FILE__,__LINE__,info->device_name,count);
1751 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") ||
1752 !tty || !info->tx_buf)
1755 if (info->params.mode == MGSL_MODE_HDLC) {
1756 if (count > TXBUFSIZE) {
1760 if (info->tx_active)
1762 else if (info->tx_count)
1768 min(TXBUFSIZE - info->tx_count - 1,
1769 TXBUFSIZE - info->tx_put));
1773 memcpy(info->tx_buf + info->tx_put, buf, c);
1775 spin_lock_irqsave(&info->lock,flags);
1776 info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1);
1777 info->tx_count += c;
1778 spin_unlock_irqrestore(&info->lock,flags);
1785 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
1786 spin_lock_irqsave(&info->lock,flags);
1787 if (!info->tx_active)
1789 spin_unlock_irqrestore(&info->lock,flags);
1792 if (debug_level >= DEBUG_LEVEL_INFO)
1793 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1794 __FILE__,__LINE__,info->device_name,ret);
1798 /* Return the count of free bytes in transmit buffer
1800 static int mgslpc_write_room(struct tty_struct *tty)
1802 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1805 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room"))
1808 if (info->params.mode == MGSL_MODE_HDLC) {
1809 /* HDLC (frame oriented) mode */
1810 if (info->tx_active)
1813 return HDLC_MAX_FRAME_SIZE;
1815 ret = TXBUFSIZE - info->tx_count - 1;
1820 if (debug_level >= DEBUG_LEVEL_INFO)
1821 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1822 __FILE__,__LINE__, info->device_name, ret);
1826 /* Return the count of bytes in transmit buffer
1828 static int mgslpc_chars_in_buffer(struct tty_struct *tty)
1830 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1833 if (debug_level >= DEBUG_LEVEL_INFO)
1834 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1835 __FILE__,__LINE__, info->device_name );
1837 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer"))
1840 if (info->params.mode == MGSL_MODE_HDLC)
1841 rc = info->tx_active ? info->max_frame_size : 0;
1843 rc = info->tx_count;
1845 if (debug_level >= DEBUG_LEVEL_INFO)
1846 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1847 __FILE__,__LINE__, info->device_name, rc);
1852 /* Discard all data in the send buffer
1854 static void mgslpc_flush_buffer(struct tty_struct *tty)
1856 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1857 unsigned long flags;
1859 if (debug_level >= DEBUG_LEVEL_INFO)
1860 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1861 __FILE__,__LINE__, info->device_name );
1863 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer"))
1866 spin_lock_irqsave(&info->lock,flags);
1867 info->tx_count = info->tx_put = info->tx_get = 0;
1868 del_timer(&info->tx_timer);
1869 spin_unlock_irqrestore(&info->lock,flags);
1871 wake_up_interruptible(&tty->write_wait);
1875 /* Send a high-priority XON/XOFF character
1877 static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
1879 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1880 unsigned long flags;
1882 if (debug_level >= DEBUG_LEVEL_INFO)
1883 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1884 __FILE__,__LINE__, info->device_name, ch );
1886 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar"))
1891 spin_lock_irqsave(&info->lock,flags);
1892 if (!info->tx_enabled)
1894 spin_unlock_irqrestore(&info->lock,flags);
1898 /* Signal remote device to throttle send data (our receive data)
1900 static void mgslpc_throttle(struct tty_struct * tty)
1902 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1903 unsigned long flags;
1905 if (debug_level >= DEBUG_LEVEL_INFO)
1906 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1907 __FILE__,__LINE__, info->device_name );
1909 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle"))
1913 mgslpc_send_xchar(tty, STOP_CHAR(tty));
1915 if (tty->termios->c_cflag & CRTSCTS) {
1916 spin_lock_irqsave(&info->lock,flags);
1917 info->serial_signals &= ~SerialSignal_RTS;
1919 spin_unlock_irqrestore(&info->lock,flags);
1923 /* Signal remote device to stop throttling send data (our receive data)
1925 static void mgslpc_unthrottle(struct tty_struct * tty)
1927 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1928 unsigned long flags;
1930 if (debug_level >= DEBUG_LEVEL_INFO)
1931 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1932 __FILE__,__LINE__, info->device_name );
1934 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle"))
1941 mgslpc_send_xchar(tty, START_CHAR(tty));
1944 if (tty->termios->c_cflag & CRTSCTS) {
1945 spin_lock_irqsave(&info->lock,flags);
1946 info->serial_signals |= SerialSignal_RTS;
1948 spin_unlock_irqrestore(&info->lock,flags);
1952 /* get the current serial statistics
1954 static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount)
1957 if (debug_level >= DEBUG_LEVEL_INFO)
1958 printk("get_params(%s)\n", info->device_name);
1959 COPY_TO_USER(err,user_icount, &info->icount, sizeof(struct mgsl_icount));
1965 /* get the current serial parameters
1967 static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
1970 if (debug_level >= DEBUG_LEVEL_INFO)
1971 printk("get_params(%s)\n", info->device_name);
1972 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
1978 /* set the serial parameters
1982 * info pointer to device instance data
1983 * new_params user buffer containing new serial params
1985 * Returns: 0 if success, otherwise error code
1987 static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params)
1989 unsigned long flags;
1990 MGSL_PARAMS tmp_params;
1993 if (debug_level >= DEBUG_LEVEL_INFO)
1994 printk("%s(%d):set_params %s\n", __FILE__,__LINE__,
1995 info->device_name );
1996 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
1998 if ( debug_level >= DEBUG_LEVEL_INFO )
1999 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
2000 __FILE__,__LINE__,info->device_name);
2004 spin_lock_irqsave(&info->lock,flags);
2005 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
2006 spin_unlock_irqrestore(&info->lock,flags);
2008 mgslpc_change_params(info);
2013 static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode)
2016 if (debug_level >= DEBUG_LEVEL_INFO)
2017 printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode);
2018 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
2024 static int set_txidle(MGSLPC_INFO * info, int idle_mode)
2026 unsigned long flags;
2027 if (debug_level >= DEBUG_LEVEL_INFO)
2028 printk("set_txidle(%s,%d)\n", info->device_name, idle_mode);
2029 spin_lock_irqsave(&info->lock,flags);
2030 info->idle_mode = idle_mode;
2032 spin_unlock_irqrestore(&info->lock,flags);
2036 static int get_interface(MGSLPC_INFO * info, int __user *if_mode)
2039 if (debug_level >= DEBUG_LEVEL_INFO)
2040 printk("get_interface(%s)=%d\n", info->device_name, info->if_mode);
2041 COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int));
2047 static int set_interface(MGSLPC_INFO * info, int if_mode)
2049 unsigned long flags;
2051 if (debug_level >= DEBUG_LEVEL_INFO)
2052 printk("set_interface(%s,%d)\n", info->device_name, if_mode);
2053 spin_lock_irqsave(&info->lock,flags);
2054 info->if_mode = if_mode;
2056 val = read_reg(info, PVR) & 0x0f;
2057 switch (info->if_mode)
2059 case MGSL_INTERFACE_RS232: val |= PVR_RS232; break;
2060 case MGSL_INTERFACE_V35: val |= PVR_V35; break;
2061 case MGSL_INTERFACE_RS422: val |= PVR_RS422; break;
2063 write_reg(info, PVR, val);
2065 spin_unlock_irqrestore(&info->lock,flags);
2069 static int set_txenable(MGSLPC_INFO * info, int enable)
2071 unsigned long flags;
2073 if (debug_level >= DEBUG_LEVEL_INFO)
2074 printk("set_txenable(%s,%d)\n", info->device_name, enable);
2076 spin_lock_irqsave(&info->lock,flags);
2078 if (!info->tx_enabled)
2081 if (info->tx_enabled)
2084 spin_unlock_irqrestore(&info->lock,flags);
2088 static int tx_abort(MGSLPC_INFO * info)
2090 unsigned long flags;
2092 if (debug_level >= DEBUG_LEVEL_INFO)
2093 printk("tx_abort(%s)\n", info->device_name);
2095 spin_lock_irqsave(&info->lock,flags);
2096 if (info->tx_active && info->tx_count &&
2097 info->params.mode == MGSL_MODE_HDLC) {
2098 /* clear data count so FIFO is not filled on next IRQ.
2099 * This results in underrun and abort transmission.
2101 info->tx_count = info->tx_put = info->tx_get = 0;
2102 info->tx_aborting = TRUE;
2104 spin_unlock_irqrestore(&info->lock,flags);
2108 static int set_rxenable(MGSLPC_INFO * info, int enable)
2110 unsigned long flags;
2112 if (debug_level >= DEBUG_LEVEL_INFO)
2113 printk("set_rxenable(%s,%d)\n", info->device_name, enable);
2115 spin_lock_irqsave(&info->lock,flags);
2117 if (!info->rx_enabled)
2120 if (info->rx_enabled)
2123 spin_unlock_irqrestore(&info->lock,flags);
2127 /* wait for specified event to occur
2129 * Arguments: info pointer to device instance data
2130 * mask pointer to bitmask of events to wait for
2131 * Return Value: 0 if successful and bit mask updated with
2132 * of events triggerred,
2133 * otherwise error code
2135 static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
2137 unsigned long flags;
2140 struct mgsl_icount cprev, cnow;
2143 struct _input_signal_events oldsigs, newsigs;
2144 DECLARE_WAITQUEUE(wait, current);
2146 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
2150 if (debug_level >= DEBUG_LEVEL_INFO)
2151 printk("wait_events(%s,%d)\n", info->device_name, mask);
2153 spin_lock_irqsave(&info->lock,flags);
2155 /* return immediately if state matches requested events */
2157 s = info->serial_signals;
2159 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
2160 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
2161 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
2162 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
2164 spin_unlock_irqrestore(&info->lock,flags);
2168 /* save current irq counts */
2169 cprev = info->icount;
2170 oldsigs = info->input_signal_events;
2172 if ((info->params.mode == MGSL_MODE_HDLC) &&
2173 (mask & MgslEvent_ExitHuntMode))
2174 irq_enable(info, CHA, IRQ_EXITHUNT);
2176 set_current_state(TASK_INTERRUPTIBLE);
2177 add_wait_queue(&info->event_wait_q, &wait);
2179 spin_unlock_irqrestore(&info->lock,flags);
2184 if (signal_pending(current)) {
2189 /* get current irq counts */
2190 spin_lock_irqsave(&info->lock,flags);
2191 cnow = info->icount;
2192 newsigs = info->input_signal_events;
2193 set_current_state(TASK_INTERRUPTIBLE);
2194 spin_unlock_irqrestore(&info->lock,flags);
2196 /* if no change, wait aborted for some reason */
2197 if (newsigs.dsr_up == oldsigs.dsr_up &&
2198 newsigs.dsr_down == oldsigs.dsr_down &&
2199 newsigs.dcd_up == oldsigs.dcd_up &&
2200 newsigs.dcd_down == oldsigs.dcd_down &&
2201 newsigs.cts_up == oldsigs.cts_up &&
2202 newsigs.cts_down == oldsigs.cts_down &&
2203 newsigs.ri_up == oldsigs.ri_up &&
2204 newsigs.ri_down == oldsigs.ri_down &&
2205 cnow.exithunt == cprev.exithunt &&
2206 cnow.rxidle == cprev.rxidle) {
2212 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
2213 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
2214 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
2215 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
2216 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
2217 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
2218 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
2219 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
2220 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
2221 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
2229 remove_wait_queue(&info->event_wait_q, &wait);
2230 set_current_state(TASK_RUNNING);
2232 if (mask & MgslEvent_ExitHuntMode) {
2233 spin_lock_irqsave(&info->lock,flags);
2234 if (!waitqueue_active(&info->event_wait_q))
2235 irq_disable(info, CHA, IRQ_EXITHUNT);
2236 spin_unlock_irqrestore(&info->lock,flags);
2240 PUT_USER(rc, events, mask_ptr);
2244 static int modem_input_wait(MGSLPC_INFO *info,int arg)
2246 unsigned long flags;
2248 struct mgsl_icount cprev, cnow;
2249 DECLARE_WAITQUEUE(wait, current);
2251 /* save current irq counts */
2252 spin_lock_irqsave(&info->lock,flags);
2253 cprev = info->icount;
2254 add_wait_queue(&info->status_event_wait_q, &wait);
2255 set_current_state(TASK_INTERRUPTIBLE);
2256 spin_unlock_irqrestore(&info->lock,flags);
2260 if (signal_pending(current)) {
2265 /* get new irq counts */
2266 spin_lock_irqsave(&info->lock,flags);
2267 cnow = info->icount;
2268 set_current_state(TASK_INTERRUPTIBLE);
2269 spin_unlock_irqrestore(&info->lock,flags);
2271 /* if no change, wait aborted for some reason */
2272 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2273 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
2278 /* check for change in caller specified modem input */
2279 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
2280 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
2281 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
2282 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
2289 remove_wait_queue(&info->status_event_wait_q, &wait);
2290 set_current_state(TASK_RUNNING);
2294 /* return the state of the serial control and status signals
2296 static int tiocmget(struct tty_struct *tty, struct file *file)
2298 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2299 unsigned int result;
2300 unsigned long flags;
2302 spin_lock_irqsave(&info->lock,flags);
2304 spin_unlock_irqrestore(&info->lock,flags);
2306 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
2307 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
2308 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
2309 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
2310 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
2311 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
2313 if (debug_level >= DEBUG_LEVEL_INFO)
2314 printk("%s(%d):%s tiocmget() value=%08X\n",
2315 __FILE__,__LINE__, info->device_name, result );
2319 /* set modem control signals (DTR/RTS)
2321 static int tiocmset(struct tty_struct *tty, struct file *file,
2322 unsigned int set, unsigned int clear)
2324 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2325 unsigned long flags;
2327 if (debug_level >= DEBUG_LEVEL_INFO)
2328 printk("%s(%d):%s tiocmset(%x,%x)\n",
2329 __FILE__,__LINE__,info->device_name, set, clear);
2331 if (set & TIOCM_RTS)
2332 info->serial_signals |= SerialSignal_RTS;
2333 if (set & TIOCM_DTR)
2334 info->serial_signals |= SerialSignal_DTR;
2335 if (clear & TIOCM_RTS)
2336 info->serial_signals &= ~SerialSignal_RTS;
2337 if (clear & TIOCM_DTR)
2338 info->serial_signals &= ~SerialSignal_DTR;
2340 spin_lock_irqsave(&info->lock,flags);
2342 spin_unlock_irqrestore(&info->lock,flags);
2347 /* Set or clear transmit break condition
2349 * Arguments: tty pointer to tty instance data
2350 * break_state -1=set break condition, 0=clear
2352 static void mgslpc_break(struct tty_struct *tty, int break_state)
2354 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2355 unsigned long flags;
2357 if (debug_level >= DEBUG_LEVEL_INFO)
2358 printk("%s(%d):mgslpc_break(%s,%d)\n",
2359 __FILE__,__LINE__, info->device_name, break_state);
2361 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break"))
2364 spin_lock_irqsave(&info->lock,flags);
2365 if (break_state == -1)
2366 set_reg_bits(info, CHA+DAFO, BIT6);
2368 clear_reg_bits(info, CHA+DAFO, BIT6);
2369 spin_unlock_irqrestore(&info->lock,flags);
2372 /* Service an IOCTL request
2376 * tty pointer to tty instance data
2377 * file pointer to associated file object for device
2378 * cmd IOCTL command code
2379 * arg command argument/context
2381 * Return Value: 0 if success, otherwise error code
2383 static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
2384 unsigned int cmd, unsigned long arg)
2386 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2388 if (debug_level >= DEBUG_LEVEL_INFO)
2389 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
2390 info->device_name, cmd );
2392 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl"))
2395 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
2396 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
2397 if (tty->flags & (1 << TTY_IO_ERROR))
2401 return ioctl_common(info, cmd, arg);
2404 int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg)
2407 struct mgsl_icount cnow; /* kernel counter temps */
2408 struct serial_icounter_struct __user *p_cuser; /* user space */
2409 void __user *argp = (void __user *)arg;
2410 unsigned long flags;
2413 case MGSL_IOCGPARAMS:
2414 return get_params(info, argp);
2415 case MGSL_IOCSPARAMS:
2416 return set_params(info, argp);
2417 case MGSL_IOCGTXIDLE:
2418 return get_txidle(info, argp);
2419 case MGSL_IOCSTXIDLE:
2420 return set_txidle(info, (int)arg);
2422 return get_interface(info, argp);
2424 return set_interface(info,(int)arg);
2425 case MGSL_IOCTXENABLE:
2426 return set_txenable(info,(int)arg);
2427 case MGSL_IOCRXENABLE:
2428 return set_rxenable(info,(int)arg);
2429 case MGSL_IOCTXABORT:
2430 return tx_abort(info);
2431 case MGSL_IOCGSTATS:
2432 return get_stats(info, argp);
2433 case MGSL_IOCWAITEVENT:
2434 return wait_events(info, argp);
2436 return modem_input_wait(info,(int)arg);
2438 spin_lock_irqsave(&info->lock,flags);
2439 cnow = info->icount;
2440 spin_unlock_irqrestore(&info->lock,flags);
2442 PUT_USER(error,cnow.cts, &p_cuser->cts);
2443 if (error) return error;
2444 PUT_USER(error,cnow.dsr, &p_cuser->dsr);
2445 if (error) return error;
2446 PUT_USER(error,cnow.rng, &p_cuser->rng);
2447 if (error) return error;
2448 PUT_USER(error,cnow.dcd, &p_cuser->dcd);
2449 if (error) return error;
2450 PUT_USER(error,cnow.rx, &p_cuser->rx);
2451 if (error) return error;
2452 PUT_USER(error,cnow.tx, &p_cuser->tx);
2453 if (error) return error;
2454 PUT_USER(error,cnow.frame, &p_cuser->frame);
2455 if (error) return error;
2456 PUT_USER(error,cnow.overrun, &p_cuser->overrun);
2457 if (error) return error;
2458 PUT_USER(error,cnow.parity, &p_cuser->parity);
2459 if (error) return error;
2460 PUT_USER(error,cnow.brk, &p_cuser->brk);
2461 if (error) return error;
2462 PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
2463 if (error) return error;
2466 return -ENOIOCTLCMD;
2471 /* Set new termios settings
2475 * tty pointer to tty structure
2476 * termios pointer to buffer to hold returned old termios
2478 static void mgslpc_set_termios(struct tty_struct *tty, struct termios *old_termios)
2480 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2481 unsigned long flags;
2483 if (debug_level >= DEBUG_LEVEL_INFO)
2484 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__,
2485 tty->driver->name );
2487 /* just return if nothing has changed */
2488 if ((tty->termios->c_cflag == old_termios->c_cflag)
2489 && (RELEVANT_IFLAG(tty->termios->c_iflag)
2490 == RELEVANT_IFLAG(old_termios->c_iflag)))
2493 mgslpc_change_params(info);
2495 /* Handle transition to B0 status */
2496 if (old_termios->c_cflag & CBAUD &&
2497 !(tty->termios->c_cflag & CBAUD)) {
2498 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
2499 spin_lock_irqsave(&info->lock,flags);
2501 spin_unlock_irqrestore(&info->lock,flags);
2504 /* Handle transition away from B0 status */
2505 if (!(old_termios->c_cflag & CBAUD) &&
2506 tty->termios->c_cflag & CBAUD) {
2507 info->serial_signals |= SerialSignal_DTR;
2508 if (!(tty->termios->c_cflag & CRTSCTS) ||
2509 !test_bit(TTY_THROTTLED, &tty->flags)) {
2510 info->serial_signals |= SerialSignal_RTS;
2512 spin_lock_irqsave(&info->lock,flags);
2514 spin_unlock_irqrestore(&info->lock,flags);
2517 /* Handle turning off CRTSCTS */
2518 if (old_termios->c_cflag & CRTSCTS &&
2519 !(tty->termios->c_cflag & CRTSCTS)) {
2520 tty->hw_stopped = 0;
2525 static void mgslpc_close(struct tty_struct *tty, struct file * filp)
2527 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2529 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close"))
2532 if (debug_level >= DEBUG_LEVEL_INFO)
2533 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2534 __FILE__,__LINE__, info->device_name, info->count);
2539 if (tty_hung_up_p(filp))
2542 if ((tty->count == 1) && (info->count != 1)) {
2544 * tty->count is 1 and the tty structure will be freed.
2545 * info->count should be one in this case.
2546 * if it's not, correct it so that the port is shutdown.
2548 printk("mgslpc_close: bad refcount; tty->count is 1, "
2549 "info->count is %d\n", info->count);
2555 /* if at least one open remaining, leave hardware active */
2559 info->flags |= ASYNC_CLOSING;
2561 /* set tty->closing to notify line discipline to
2562 * only process XON/XOFF characters. Only the N_TTY
2563 * discipline appears to use this (ppp does not).
2567 /* wait for transmit data to clear all layers */
2569 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
2570 if (debug_level >= DEBUG_LEVEL_INFO)
2571 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2572 __FILE__,__LINE__, info->device_name );
2573 tty_wait_until_sent(tty, info->closing_wait);
2576 if (info->flags & ASYNC_INITIALIZED)
2577 mgslpc_wait_until_sent(tty, info->timeout);
2579 if (tty->driver->flush_buffer)
2580 tty->driver->flush_buffer(tty);
2582 ldisc_flush_buffer(tty);
2589 if (info->blocked_open) {
2590 if (info->close_delay) {
2591 msleep_interruptible(jiffies_to_msecs(info->close_delay));
2593 wake_up_interruptible(&info->open_wait);
2596 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
2598 wake_up_interruptible(&info->close_wait);
2601 if (debug_level >= DEBUG_LEVEL_INFO)
2602 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__,
2603 tty->driver->name, info->count);
2606 /* Wait until the transmitter is empty.
2608 static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
2610 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2611 unsigned long orig_jiffies, char_time;
2616 if (debug_level >= DEBUG_LEVEL_INFO)
2617 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2618 __FILE__,__LINE__, info->device_name );
2620 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
2623 if (!(info->flags & ASYNC_INITIALIZED))
2626 orig_jiffies = jiffies;
2628 /* Set check interval to 1/5 of estimated time to
2629 * send a character, and make it at least 1. The check
2630 * interval should also be less than the timeout.
2631 * Note: use tight timings here to satisfy the NIST-PCTS.
2634 if ( info->params.data_rate ) {
2635 char_time = info->timeout/(32 * 5);
2642 char_time = min_t(unsigned long, char_time, timeout);
2644 if (info->params.mode == MGSL_MODE_HDLC) {
2645 while (info->tx_active) {
2646 msleep_interruptible(jiffies_to_msecs(char_time));
2647 if (signal_pending(current))
2649 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2653 while ((info->tx_count || info->tx_active) &&
2655 msleep_interruptible(jiffies_to_msecs(char_time));
2656 if (signal_pending(current))
2658 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2664 if (debug_level >= DEBUG_LEVEL_INFO)
2665 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2666 __FILE__,__LINE__, info->device_name );
2669 /* Called by tty_hangup() when a hangup is signaled.
2670 * This is the same as closing all open files for the port.
2672 static void mgslpc_hangup(struct tty_struct *tty)
2674 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2676 if (debug_level >= DEBUG_LEVEL_INFO)
2677 printk("%s(%d):mgslpc_hangup(%s)\n",
2678 __FILE__,__LINE__, info->device_name );
2680 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup"))
2683 mgslpc_flush_buffer(tty);
2687 info->flags &= ~ASYNC_NORMAL_ACTIVE;
2690 wake_up_interruptible(&info->open_wait);
2693 /* Block the current process until the specified port
2694 * is ready to be opened.
2696 static int block_til_ready(struct tty_struct *tty, struct file *filp,
2699 DECLARE_WAITQUEUE(wait, current);
2701 int do_clocal = 0, extra_count = 0;
2702 unsigned long flags;
2704 if (debug_level >= DEBUG_LEVEL_INFO)
2705 printk("%s(%d):block_til_ready on %s\n",
2706 __FILE__,__LINE__, tty->driver->name );
2708 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
2709 /* nonblock mode is set or port is not enabled */
2710 /* just verify that callout device is not active */
2711 info->flags |= ASYNC_NORMAL_ACTIVE;
2715 if (tty->termios->c_cflag & CLOCAL)
2718 /* Wait for carrier detect and the line to become
2719 * free (i.e., not in use by the callout). While we are in
2720 * this loop, info->count is dropped by one, so that
2721 * mgslpc_close() knows when to free things. We restore it upon
2722 * exit, either normal or abnormal.
2726 add_wait_queue(&info->open_wait, &wait);
2728 if (debug_level >= DEBUG_LEVEL_INFO)
2729 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2730 __FILE__,__LINE__, tty->driver->name, info->count );
2732 spin_lock_irqsave(&info->lock, flags);
2733 if (!tty_hung_up_p(filp)) {
2737 spin_unlock_irqrestore(&info->lock, flags);
2738 info->blocked_open++;
2741 if ((tty->termios->c_cflag & CBAUD)) {
2742 spin_lock_irqsave(&info->lock,flags);
2743 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2745 spin_unlock_irqrestore(&info->lock,flags);
2748 set_current_state(TASK_INTERRUPTIBLE);
2750 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
2751 retval = (info->flags & ASYNC_HUP_NOTIFY) ?
2752 -EAGAIN : -ERESTARTSYS;
2756 spin_lock_irqsave(&info->lock,flags);
2758 spin_unlock_irqrestore(&info->lock,flags);
2760 if (!(info->flags & ASYNC_CLOSING) &&
2761 (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
2765 if (signal_pending(current)) {
2766 retval = -ERESTARTSYS;
2770 if (debug_level >= DEBUG_LEVEL_INFO)
2771 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2772 __FILE__,__LINE__, tty->driver->name, info->count );
2777 set_current_state(TASK_RUNNING);
2778 remove_wait_queue(&info->open_wait, &wait);
2782 info->blocked_open--;
2784 if (debug_level >= DEBUG_LEVEL_INFO)
2785 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2786 __FILE__,__LINE__, tty->driver->name, info->count );
2789 info->flags |= ASYNC_NORMAL_ACTIVE;
2794 static int mgslpc_open(struct tty_struct *tty, struct file * filp)
2798 unsigned long flags;
2800 /* verify range of specified line number */
2802 if ((line < 0) || (line >= mgslpc_device_count)) {
2803 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2804 __FILE__,__LINE__,line);
2808 /* find the info structure for the specified line */
2809 info = mgslpc_device_list;
2810 while(info && info->line != line)
2811 info = info->next_device;
2812 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open"))
2815 tty->driver_data = info;
2818 if (debug_level >= DEBUG_LEVEL_INFO)
2819 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2820 __FILE__,__LINE__,tty->driver->name, info->count);
2822 /* If port is closing, signal caller to try again */
2823 if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){
2824 if (info->flags & ASYNC_CLOSING)
2825 interruptible_sleep_on(&info->close_wait);
2826 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2827 -EAGAIN : -ERESTARTSYS);
2831 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2833 spin_lock_irqsave(&info->netlock, flags);
2834 if (info->netcount) {
2836 spin_unlock_irqrestore(&info->netlock, flags);
2840 spin_unlock_irqrestore(&info->netlock, flags);
2842 if (info->count == 1) {
2843 /* 1st open on this device, init hardware */
2844 retval = startup(info);
2849 retval = block_til_ready(tty, filp, info);
2851 if (debug_level >= DEBUG_LEVEL_INFO)
2852 printk("%s(%d):block_til_ready(%s) returned %d\n",
2853 __FILE__,__LINE__, info->device_name, retval);
2857 if (debug_level >= DEBUG_LEVEL_INFO)
2858 printk("%s(%d):mgslpc_open(%s) success\n",
2859 __FILE__,__LINE__, info->device_name);
2864 if (tty->count == 1)
2865 info->tty = NULL; /* tty layer will release tty struct */
2874 * /proc fs routines....
2877 static inline int line_info(char *buf, MGSLPC_INFO *info)
2881 unsigned long flags;
2883 ret = sprintf(buf, "%s:io:%04X irq:%d",
2884 info->device_name, info->io_base, info->irq_level);
2886 /* output current serial signal states */
2887 spin_lock_irqsave(&info->lock,flags);
2889 spin_unlock_irqrestore(&info->lock,flags);
2893 if (info->serial_signals & SerialSignal_RTS)
2894 strcat(stat_buf, "|RTS");
2895 if (info->serial_signals & SerialSignal_CTS)
2896 strcat(stat_buf, "|CTS");
2897 if (info->serial_signals & SerialSignal_DTR)
2898 strcat(stat_buf, "|DTR");
2899 if (info->serial_signals & SerialSignal_DSR)
2900 strcat(stat_buf, "|DSR");
2901 if (info->serial_signals & SerialSignal_DCD)
2902 strcat(stat_buf, "|CD");
2903 if (info->serial_signals & SerialSignal_RI)
2904 strcat(stat_buf, "|RI");
2906 if (info->params.mode == MGSL_MODE_HDLC) {
2907 ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d",
2908 info->icount.txok, info->icount.rxok);
2909 if (info->icount.txunder)
2910 ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
2911 if (info->icount.txabort)
2912 ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
2913 if (info->icount.rxshort)
2914 ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
2915 if (info->icount.rxlong)
2916 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
2917 if (info->icount.rxover)
2918 ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
2919 if (info->icount.rxcrc)
2920 ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc);
2922 ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d",
2923 info->icount.tx, info->icount.rx);
2924 if (info->icount.frame)
2925 ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
2926 if (info->icount.parity)
2927 ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
2928 if (info->icount.brk)
2929 ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
2930 if (info->icount.overrun)
2931 ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
2934 /* Append serial signal status to end */
2935 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
2937 ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2938 info->tx_active,info->bh_requested,info->bh_running,
2944 /* Called to print information about devices
2946 static int mgslpc_read_proc(char *page, char **start, off_t off, int count,
2947 int *eof, void *data)
2953 len += sprintf(page, "synclink driver:%s\n", driver_version);
2955 info = mgslpc_device_list;
2957 l = line_info(page + len, info);
2959 if (len+begin > off+count)
2961 if (len+begin < off) {
2965 info = info->next_device;
2970 if (off >= len+begin)
2972 *start = page + (off-begin);
2973 return ((count < begin+len-off) ? count : begin+len-off);
2976 int rx_alloc_buffers(MGSLPC_INFO *info)
2978 /* each buffer has header and data */
2979 info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size;
2981 /* calculate total allocation size for 8 buffers */
2982 info->rx_buf_total_size = info->rx_buf_size * 8;
2984 /* limit total allocated memory */
2985 if (info->rx_buf_total_size > 0x10000)
2986 info->rx_buf_total_size = 0x10000;
2988 /* calculate number of buffers */
2989 info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size;
2991 info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL);
2992 if (info->rx_buf == NULL)
2995 rx_reset_buffers(info);
2999 void rx_free_buffers(MGSLPC_INFO *info)
3002 kfree(info->rx_buf);
3003 info->rx_buf = NULL;
3006 int claim_resources(MGSLPC_INFO *info)
3008 if (rx_alloc_buffers(info) < 0 ) {
3009 printk( "Cant allocate rx buffer %s\n", info->device_name);
3010 release_resources(info);
3016 void release_resources(MGSLPC_INFO *info)
3018 if (debug_level >= DEBUG_LEVEL_INFO)
3019 printk("release_resources(%s)\n", info->device_name);
3020 rx_free_buffers(info);
3023 /* Add the specified device instance data structure to the
3024 * global linked list of devices and increment the device count.
3026 * Arguments: info pointer to device instance data
3028 void mgslpc_add_device(MGSLPC_INFO *info)
3030 info->next_device = NULL;
3031 info->line = mgslpc_device_count;
3032 sprintf(info->device_name,"ttySLP%d",info->line);
3034 if (info->line < MAX_DEVICE_COUNT) {
3035 if (maxframe[info->line])
3036 info->max_frame_size = maxframe[info->line];
3037 info->dosyncppp = dosyncppp[info->line];
3040 mgslpc_device_count++;
3042 if (!mgslpc_device_list)
3043 mgslpc_device_list = info;
3045 MGSLPC_INFO *current_dev = mgslpc_device_list;
3046 while( current_dev->next_device )
3047 current_dev = current_dev->next_device;
3048 current_dev->next_device = info;
3051 if (info->max_frame_size < 4096)
3052 info->max_frame_size = 4096;
3053 else if (info->max_frame_size > 65535)
3054 info->max_frame_size = 65535;
3056 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
3057 info->device_name, info->io_base, info->irq_level);
3064 void mgslpc_remove_device(MGSLPC_INFO *remove_info)
3066 MGSLPC_INFO *info = mgslpc_device_list;
3067 MGSLPC_INFO *last = NULL;
3070 if (info == remove_info) {
3072 last->next_device = info->next_device;
3074 mgslpc_device_list = info->next_device;
3078 release_resources(info);
3080 mgslpc_device_count--;
3084 info = info->next_device;
3088 static struct pcmcia_driver mgslpc_driver = {
3089 .owner = THIS_MODULE,
3091 .name = "synclink_cs",
3093 .attach = mgslpc_attach,
3094 .detach = mgslpc_detach,
3097 static struct tty_operations mgslpc_ops = {
3098 .open = mgslpc_open,
3099 .close = mgslpc_close,
3100 .write = mgslpc_write,
3101 .put_char = mgslpc_put_char,
3102 .flush_chars = mgslpc_flush_chars,
3103 .write_room = mgslpc_write_room,
3104 .chars_in_buffer = mgslpc_chars_in_buffer,
3105 .flush_buffer = mgslpc_flush_buffer,
3106 .ioctl = mgslpc_ioctl,
3107 .throttle = mgslpc_throttle,
3108 .unthrottle = mgslpc_unthrottle,
3109 .send_xchar = mgslpc_send_xchar,
3110 .break_ctl = mgslpc_break,
3111 .wait_until_sent = mgslpc_wait_until_sent,
3112 .read_proc = mgslpc_read_proc,
3113 .set_termios = mgslpc_set_termios,
3115 .start = tx_release,
3116 .hangup = mgslpc_hangup,
3117 .tiocmget = tiocmget,
3118 .tiocmset = tiocmset,
3121 static void synclink_cs_cleanup(void)
3125 printk("Unloading %s: version %s\n", driver_name, driver_version);
3127 while(mgslpc_device_list)
3128 mgslpc_remove_device(mgslpc_device_list);
3130 if (serial_driver) {
3131 if ((rc = tty_unregister_driver(serial_driver)))
3132 printk("%s(%d) failed to unregister tty driver err=%d\n",
3133 __FILE__,__LINE__,rc);
3134 put_tty_driver(serial_driver);
3137 pcmcia_unregister_driver(&mgslpc_driver);
3138 BUG_ON(dev_list != NULL);
3141 static int __init synclink_cs_init(void)
3145 if (break_on_load) {
3146 mgslpc_get_text_ptr();
3150 printk("%s %s\n", driver_name, driver_version);
3152 if ((rc = pcmcia_register_driver(&mgslpc_driver)) < 0)
3155 serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT);
3156 if (!serial_driver) {
3161 /* Initialize the tty_driver structure */
3163 serial_driver->owner = THIS_MODULE;
3164 serial_driver->driver_name = "synclink_cs";
3165 serial_driver->name = "ttySLP";
3166 serial_driver->major = ttymajor;
3167 serial_driver->minor_start = 64;
3168 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
3169 serial_driver->subtype = SERIAL_TYPE_NORMAL;
3170 serial_driver->init_termios = tty_std_termios;
3171 serial_driver->init_termios.c_cflag =
3172 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
3173 serial_driver->flags = TTY_DRIVER_REAL_RAW;
3174 tty_set_operations(serial_driver, &mgslpc_ops);
3176 if ((rc = tty_register_driver(serial_driver)) < 0) {
3177 printk("%s(%d):Couldn't register serial driver\n",
3179 put_tty_driver(serial_driver);
3180 serial_driver = NULL;
3184 printk("%s %s, tty major#%d\n",
3185 driver_name, driver_version,
3186 serial_driver->major);
3191 synclink_cs_cleanup();
3195 static void __exit synclink_cs_exit(void)
3197 synclink_cs_cleanup();
3200 module_init(synclink_cs_init);
3201 module_exit(synclink_cs_exit);
3203 static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate)
3208 /* note:standard BRG mode is broken in V3.2 chip
3209 * so enhanced mode is always used
3217 for (M = 1; N > 64 && M < 16; M++)
3223 * BGR[7..0] contained in BGR register
3224 * BGR[9..8] contained in CCR2[7..6]
3225 * divisor = (N+1)*2^M
3227 * Note: M *must* not be zero (causes asymetric duty cycle)
3229 write_reg(info, (unsigned char) (channel + BGR),
3230 (unsigned char) ((M << 6) + N));
3231 val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f;
3232 val |= ((M << 4) & 0xc0);
3233 write_reg(info, (unsigned char) (channel + CCR2), val);
3237 /* Enabled the AUX clock output at the specified frequency.
3239 static void enable_auxclk(MGSLPC_INFO *info)
3245 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3246 * 05 ADM Address Mode, 0 = no addr recognition
3247 * 04 TMD Timer Mode, 0 = external
3248 * 03 RAC Receiver Active, 0 = inactive
3249 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3250 * 01 TRS Timer Resolution, 1=512
3251 * 00 TLP Test Loop, 0 = no loop
3257 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3258 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3260 write_reg(info, CHB + MODE, val);
3264 * 07 PU Power Up, 1=active, 0=power down
3265 * 06 MCE Master Clock Enable, 1=enabled
3267 * 04..02 SC[2..0] Encoding
3268 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3272 write_reg(info, CHB + CCR0, 0xc0);
3276 * 07 SFLG Shared Flag, 0 = disable shared flags
3277 * 06 GALP Go Active On Loop, 0 = not used
3278 * 05 GLP Go On Loop, 0 = not used
3279 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3280 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3281 * 02..00 CM[2..0] Clock Mode
3285 write_reg(info, CHB + CCR1, 0x17);
3289 * 07..06 BGR[9..8] Baud rate bits 9..8
3290 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3291 * 04 SSEL Clock source select, 1=submode b
3292 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3293 * 02 RWX Read/Write Exchange 0=disabled
3294 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3295 * 00 DIV, data inversion 0=disabled, 1=enabled
3299 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3300 write_reg(info, CHB + CCR2, 0x38);
3302 write_reg(info, CHB + CCR2, 0x30);
3306 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3307 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3308 * 05 TST1 Test Pin, 0=normal operation
3309 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3310 * 03..02 Reserved, must be 0
3311 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3315 write_reg(info, CHB + CCR4, 0x50);
3317 /* if auxclk not enabled, set internal BRG so
3318 * CTS transitions can be detected (requires TxC)
3320 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3321 mgslpc_set_rate(info, CHB, info->params.clock_speed);
3323 mgslpc_set_rate(info, CHB, 921600);
3326 static void loopback_enable(MGSLPC_INFO *info)
3330 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3331 val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0);
3332 write_reg(info, CHA + CCR1, val);
3334 /* CCR2:04 SSEL Clock source select, 1=submode b */
3335 val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5);
3336 write_reg(info, CHA + CCR2, val);
3338 /* set LinkSpeed if available, otherwise default to 2Mbps */
3339 if (info->params.clock_speed)
3340 mgslpc_set_rate(info, CHA, info->params.clock_speed);
3342 mgslpc_set_rate(info, CHA, 1843200);
3344 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3345 val = read_reg(info, CHA + MODE) | BIT0;
3346 write_reg(info, CHA + MODE, val);
3349 void hdlc_mode(MGSLPC_INFO *info)
3352 unsigned char clkmode, clksubmode;
3354 /* disable all interrupts */
3355 irq_disable(info, CHA, 0xffff);
3356 irq_disable(info, CHB, 0xffff);
3357 port_irq_disable(info, 0xff);
3359 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3360 clkmode = clksubmode = 0;
3361 if (info->params.flags & HDLC_FLAG_RXC_DPLL
3362 && info->params.flags & HDLC_FLAG_TXC_DPLL) {
3363 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3365 } else if (info->params.flags & HDLC_FLAG_RXC_BRG
3366 && info->params.flags & HDLC_FLAG_TXC_BRG) {
3367 /* clock mode 7b, rcv = BRG, xmt = BRG */
3370 } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) {
3371 if (info->params.flags & HDLC_FLAG_TXC_BRG) {
3372 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3376 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3379 } else if (info->params.flags & HDLC_FLAG_TXC_BRG) {
3380 /* clock mode 0b, rcv = RxC, xmt = BRG */
3386 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3387 * 05 ADM Address Mode, 0 = no addr recognition
3388 * 04 TMD Timer Mode, 0 = external
3389 * 03 RAC Receiver Active, 0 = inactive
3390 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3391 * 01 TRS Timer Resolution, 1=512
3392 * 00 TLP Test Loop, 0 = no loop
3397 if (info->params.loopback)
3400 /* preserve RTS state */
3401 if (info->serial_signals & SerialSignal_RTS)
3403 write_reg(info, CHA + MODE, val);
3407 * 07 PU Power Up, 1=active, 0=power down
3408 * 06 MCE Master Clock Enable, 1=enabled
3410 * 04..02 SC[2..0] Encoding
3411 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3416 switch (info->params.encoding)
3418 case HDLC_ENCODING_NRZI:
3421 case HDLC_ENCODING_BIPHASE_SPACE:
3424 case HDLC_ENCODING_BIPHASE_MARK:
3427 case HDLC_ENCODING_BIPHASE_LEVEL:
3429 break; // Manchester
3431 write_reg(info, CHA + CCR0, val);
3435 * 07 SFLG Shared Flag, 0 = disable shared flags
3436 * 06 GALP Go Active On Loop, 0 = not used
3437 * 05 GLP Go On Loop, 0 = not used
3438 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3439 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3440 * 02..00 CM[2..0] Clock Mode
3444 val = 0x10 + clkmode;
3445 write_reg(info, CHA + CCR1, val);
3449 * 07..06 BGR[9..8] Baud rate bits 9..8
3450 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3451 * 04 SSEL Clock source select, 1=submode b
3452 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3453 * 02 RWX Read/Write Exchange 0=disabled
3454 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3455 * 00 DIV, data inversion 0=disabled, 1=enabled
3460 if (clkmode == 2 || clkmode == 3 || clkmode == 6
3461 || clkmode == 7 || (clkmode == 0 && clksubmode == 1))
3465 if (info->params.crc_type == HDLC_CRC_32_CCITT)
3467 if (info->params.encoding == HDLC_ENCODING_NRZB)
3469 write_reg(info, CHA + CCR2, val);
3473 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3474 * 05 EPT Enable preamble transmission, 1=enabled
3475 * 04 RADD Receive address pushed to FIFO, 0=disabled
3476 * 03 CRL CRC Reset Level, 0=FFFF
3477 * 02 RCRC Rx CRC 0=On 1=Off
3478 * 01 TCRC Tx CRC 0=On 1=Off
3479 * 00 PSD DPLL Phase Shift Disable
3484 if (info->params.crc_type == HDLC_CRC_NONE)
3486 if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
3488 switch (info->params.preamble_length)
3490 case HDLC_PREAMBLE_LENGTH_16BITS:
3493 case HDLC_PREAMBLE_LENGTH_32BITS:
3496 case HDLC_PREAMBLE_LENGTH_64BITS:
3500 write_reg(info, CHA + CCR3, val);
3502 /* PRE - Preamble pattern */
3504 switch (info->params.preamble)
3506 case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
3507 case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break;
3508 case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break;
3509 case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break;
3511 write_reg(info, CHA + PRE, val);
3515 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3516 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3517 * 05 TST1 Test Pin, 0=normal operation
3518 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3519 * 03..02 Reserved, must be 0
3520 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3525 write_reg(info, CHA + CCR4, val);
3526 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
3527 mgslpc_set_rate(info, CHA, info->params.clock_speed * 16);
3529 mgslpc_set_rate(info, CHA, info->params.clock_speed);
3531 /* RLCR Receive length check register
3533 * 7 1=enable receive length check
3534 * 6..0 Max frame length = (RL + 1) * 32
3536 write_reg(info, CHA + RLCR, 0);
3538 /* XBCH Transmit Byte Count High
3540 * 07 DMA mode, 0 = interrupt driven
3541 * 06 NRM, 0=ABM (ignored)
3542 * 05 CAS Carrier Auto Start
3543 * 04 XC Transmit Continuously (ignored)
3544 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3549 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
3551 write_reg(info, CHA + XBCH, val);
3552 enable_auxclk(info);
3553 if (info->params.loopback || info->testing_irq)
3554 loopback_enable(info);
3555 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
3557 irq_enable(info, CHB, IRQ_CTS);
3558 /* PVR[3] 1=AUTO CTS active */
3559 set_reg_bits(info, CHA + PVR, BIT3);
3561 clear_reg_bits(info, CHA + PVR, BIT3);
3563 irq_enable(info, CHA,
3564 IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT +
3565 IRQ_UNDERRUN + IRQ_TXFIFO);
3566 issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
3567 wait_command_complete(info, CHA);
3568 read_reg16(info, CHA + ISR); /* clear pending IRQs */
3570 /* Master clock mode enabled above to allow reset commands
3571 * to complete even if no data clocks are present.
3573 * Disable master clock mode for normal communications because
3574 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3575 * IRQ when in master clock mode.
3577 * Leave master clock mode enabled for IRQ test because the
3578 * timer IRQ used by the test can only happen in master clock mode.
3580 if (!info->testing_irq)
3581 clear_reg_bits(info, CHA + CCR0, BIT6);
3589 void rx_stop(MGSLPC_INFO *info)
3591 if (debug_level >= DEBUG_LEVEL_ISR)
3592 printk("%s(%d):rx_stop(%s)\n",
3593 __FILE__,__LINE__, info->device_name );
3595 /* MODE:03 RAC Receiver Active, 0=inactive */
3596 clear_reg_bits(info, CHA + MODE, BIT3);
3598 info->rx_enabled = 0;
3599 info->rx_overflow = 0;
3602 void rx_start(MGSLPC_INFO *info)
3604 if (debug_level >= DEBUG_LEVEL_ISR)
3605 printk("%s(%d):rx_start(%s)\n",
3606 __FILE__,__LINE__, info->device_name );
3608 rx_reset_buffers(info);
3609 info->rx_enabled = 0;
3610 info->rx_overflow = 0;
3612 /* MODE:03 RAC Receiver Active, 1=active */
3613 set_reg_bits(info, CHA + MODE, BIT3);
3615 info->rx_enabled = 1;
3618 void tx_start(MGSLPC_INFO *info)
3620 if (debug_level >= DEBUG_LEVEL_ISR)
3621 printk("%s(%d):tx_start(%s)\n",
3622 __FILE__,__LINE__, info->device_name );
3624 if (info->tx_count) {
3625 /* If auto RTS enabled and RTS is inactive, then assert */
3626 /* RTS and set a flag indicating that the driver should */
3627 /* negate RTS when the transmission completes. */
3628 info->drop_rts_on_tx_done = 0;
3630 if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
3632 if (!(info->serial_signals & SerialSignal_RTS)) {
3633 info->serial_signals |= SerialSignal_RTS;
3635 info->drop_rts_on_tx_done = 1;
3639 if (info->params.mode == MGSL_MODE_ASYNC) {
3640 if (!info->tx_active) {
3641 info->tx_active = 1;
3645 info->tx_active = 1;
3647 info->tx_timer.expires = jiffies + msecs_to_jiffies(5000);
3648 add_timer(&info->tx_timer);
3652 if (!info->tx_enabled)
3653 info->tx_enabled = 1;
3656 void tx_stop(MGSLPC_INFO *info)
3658 if (debug_level >= DEBUG_LEVEL_ISR)
3659 printk("%s(%d):tx_stop(%s)\n",
3660 __FILE__,__LINE__, info->device_name );
3662 del_timer(&info->tx_timer);
3664 info->tx_enabled = 0;
3665 info->tx_active = 0;
3668 /* Reset the adapter to a known state and prepare it for further use.
3670 void reset_device(MGSLPC_INFO *info)
3672 /* power up both channels (set BIT7) */
3673 write_reg(info, CHA + CCR0, 0x80);
3674 write_reg(info, CHB + CCR0, 0x80);
3675 write_reg(info, CHA + MODE, 0);
3676 write_reg(info, CHB + MODE, 0);
3678 /* disable all interrupts */
3679 irq_disable(info, CHA, 0xffff);
3680 irq_disable(info, CHB, 0xffff);
3681 port_irq_disable(info, 0xff);
3683 /* PCR Port Configuration Register
3685 * 07..04 DEC[3..0] Serial I/F select outputs
3686 * 03 output, 1=AUTO CTS control enabled
3687 * 02 RI Ring Indicator input 0=active
3688 * 01 DSR input 0=active
3689 * 00 DTR output 0=active
3693 write_reg(info, PCR, 0x06);
3695 /* PVR Port Value Register
3697 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3698 * 03 AUTO CTS output 1=enabled
3699 * 02 RI Ring Indicator input
3701 * 00 DTR output (1=inactive)
3705 // write_reg(info, PVR, PVR_DTR);
3707 /* IPC Interrupt Port Configuration
3709 * 07 VIS 1=Masked interrupts visible
3710 * 06..05 Reserved, 0
3711 * 04..03 SLA Slave address, 00 ignored
3712 * 02 CASM Cascading Mode, 1=daisy chain
3713 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3717 write_reg(info, IPC, 0x05);
3720 void async_mode(MGSLPC_INFO *info)
3724 /* disable all interrupts */
3725 irq_disable(info, CHA, 0xffff);
3726 irq_disable(info, CHB, 0xffff);
3727 port_irq_disable(info, 0xff);
3732 * 06 FRTS RTS State, 0=active
3733 * 05 FCTS Flow Control on CTS
3734 * 04 FLON Flow Control Enable
3735 * 03 RAC Receiver Active, 0 = inactive
3736 * 02 RTS 0=Auto RTS, 1=manual RTS
3737 * 01 TRS Timer Resolution, 1=512
3738 * 00 TLP Test Loop, 0 = no loop
3743 if (info->params.loopback)
3746 /* preserve RTS state */
3747 if (!(info->serial_signals & SerialSignal_RTS))
3749 write_reg(info, CHA + MODE, val);
3753 * 07 PU Power Up, 1=active, 0=power down
3754 * 06 MCE Master Clock Enable, 1=enabled
3756 * 04..02 SC[2..0] Encoding, 000=NRZ
3757 * 01..00 SM[1..0] Serial Mode, 11=Async
3761 write_reg(info, CHA + CCR0, 0x83);
3765 * 07..05 Reserved, 0
3766 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3767 * 03 BCR Bit Clock Rate, 1=16x
3768 * 02..00 CM[2..0] Clock Mode, 111=BRG
3772 write_reg(info, CHA + CCR1, 0x1f);
3776 * 07..06 BGR[9..8] Baud rate bits 9..8
3777 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3778 * 04 SSEL Clock source select, 1=submode b
3779 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3780 * 02 RWX Read/Write Exchange 0=disabled
3782 * 00 DIV, data inversion 0=disabled, 1=enabled
3786 write_reg(info, CHA + CCR2, 0x10);
3790 * 07..01 Reserved, 0
3791 * 00 PSD DPLL Phase Shift Disable
3795 write_reg(info, CHA + CCR3, 0);
3799 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3800 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3801 * 05 TST1 Test Pin, 0=normal operation
3802 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3803 * 03..00 Reserved, must be 0
3807 write_reg(info, CHA + CCR4, 0x50);
3808 mgslpc_set_rate(info, CHA, info->params.data_rate * 16);
3813 * 06 XBRK transmit break, 0=normal operation
3814 * 05 Stop bits (0=1, 1=2)
3815 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3816 * 02 PAREN Parity Enable
3817 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3821 if (info->params.data_bits != 8)
3822 val |= BIT0; /* 7 bits */
3823 if (info->params.stop_bits != 1)
3825 if (info->params.parity != ASYNC_PARITY_NONE)
3827 val |= BIT2; /* Parity enable */
3828 if (info->params.parity == ASYNC_PARITY_ODD)
3833 write_reg(info, CHA + DAFO, val);
3835 /* RFC Rx FIFO Control
3838 * 06 DPS, 1=parity bit not stored in data byte
3839 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3840 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3841 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3843 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3847 write_reg(info, CHA + RFC, 0x5c);
3849 /* RLCR Receive length check register
3851 * Max frame length = (RL + 1) * 32
3853 write_reg(info, CHA + RLCR, 0);
3855 /* XBCH Transmit Byte Count High
3857 * 07 DMA mode, 0 = interrupt driven
3858 * 06 NRM, 0=ABM (ignored)
3859 * 05 CAS Carrier Auto Start
3860 * 04 XC Transmit Continuously (ignored)
3861 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3866 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
3868 write_reg(info, CHA + XBCH, val);
3869 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
3870 irq_enable(info, CHA, IRQ_CTS);
3872 /* MODE:03 RAC Receiver Active, 1=active */
3873 set_reg_bits(info, CHA + MODE, BIT3);
3874 enable_auxclk(info);
3875 if (info->params.flags & HDLC_FLAG_AUTO_CTS) {
3876 irq_enable(info, CHB, IRQ_CTS);
3877 /* PVR[3] 1=AUTO CTS active */
3878 set_reg_bits(info, CHA + PVR, BIT3);
3880 clear_reg_bits(info, CHA + PVR, BIT3);
3881 irq_enable(info, CHA,
3882 IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME +
3883 IRQ_ALLSENT + IRQ_TXFIFO);
3884 issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
3885 wait_command_complete(info, CHA);
3886 read_reg16(info, CHA + ISR); /* clear pending IRQs */
3889 /* Set the HDLC idle mode for the transmitter.
3891 void tx_set_idle(MGSLPC_INFO *info)
3893 /* Note: ESCC2 only supports flags and one idle modes */
3894 if (info->idle_mode == HDLC_TXIDLE_FLAGS)
3895 set_reg_bits(info, CHA + CCR1, BIT3);
3897 clear_reg_bits(info, CHA + CCR1, BIT3);
3900 /* get state of the V24 status (input) signals.
3902 void get_signals(MGSLPC_INFO *info)
3904 unsigned char status = 0;
3906 /* preserve DTR and RTS */
3907 info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
3909 if (read_reg(info, CHB + VSTR) & BIT7)
3910 info->serial_signals |= SerialSignal_DCD;
3911 if (read_reg(info, CHB + STAR) & BIT1)
3912 info->serial_signals |= SerialSignal_CTS;
3914 status = read_reg(info, CHA + PVR);
3915 if (!(status & PVR_RI))
3916 info->serial_signals |= SerialSignal_RI;
3917 if (!(status & PVR_DSR))
3918 info->serial_signals |= SerialSignal_DSR;
3921 /* Set the state of DTR and RTS based on contents of
3922 * serial_signals member of device extension.
3924 void set_signals(MGSLPC_INFO *info)
3928 val = read_reg(info, CHA + MODE);
3929 if (info->params.mode == MGSL_MODE_ASYNC) {
3930 if (info->serial_signals & SerialSignal_RTS)
3935 if (info->serial_signals & SerialSignal_RTS)
3940 write_reg(info, CHA + MODE, val);
3942 if (info->serial_signals & SerialSignal_DTR)
3943 clear_reg_bits(info, CHA + PVR, PVR_DTR);
3945 set_reg_bits(info, CHA + PVR, PVR_DTR);
3948 void rx_reset_buffers(MGSLPC_INFO *info)
3955 info->rx_frame_count = 0;
3956 for (i=0 ; i < info->rx_buf_count ; i++) {
3957 buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size));
3958 buf->status = buf->count = 0;
3962 /* Attempt to return a received HDLC frame
3963 * Only frames received without errors are returned.
3965 * Returns 1 if frame returned, otherwise 0
3967 int rx_get_frame(MGSLPC_INFO *info)
3969 unsigned short status;
3971 unsigned int framesize = 0;
3972 unsigned long flags;
3973 struct tty_struct *tty = info->tty;
3974 int return_frame = 0;
3976 if (info->rx_frame_count == 0)
3979 buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size));
3981 status = buf->status;
3983 /* 07 VFR 1=valid frame
3984 * 06 RDO 1=data overrun
3985 * 05 CRC 1=OK, 0=error
3986 * 04 RAB 1=frame aborted
3988 if ((status & 0xf0) != 0xA0) {
3989 if (!(status & BIT7) || (status & BIT4))
3990 info->icount.rxabort++;
3991 else if (status & BIT6)
3992 info->icount.rxover++;
3993 else if (!(status & BIT5)) {
3994 info->icount.rxcrc++;
3995 if (info->params.crc_type & HDLC_CRC_RETURN_EX)
4001 struct net_device_stats *stats = hdlc_stats(info->netdev);
4003 stats->rx_frame_errors++;
4010 framesize = buf->count;
4012 if (debug_level >= DEBUG_LEVEL_BH)
4013 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
4014 __FILE__,__LINE__,info->device_name,status,framesize);
4016 if (debug_level >= DEBUG_LEVEL_DATA)
4017 trace_block(info, buf->data, framesize, 0);
4020 if ((info->params.crc_type & HDLC_CRC_RETURN_EX &&
4021 framesize+1 > info->max_frame_size) ||
4022 framesize > info->max_frame_size)
4023 info->icount.rxlong++;
4026 info->icount.rxok++;
4028 if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
4029 *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR;
4035 hdlcdev_rx(info, buf->data, framesize);
4038 ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize);
4042 spin_lock_irqsave(&info->lock,flags);
4043 buf->status = buf->count = 0;
4044 info->rx_frame_count--;
4046 if (info->rx_get >= info->rx_buf_count)
4048 spin_unlock_irqrestore(&info->lock,flags);
4053 BOOLEAN register_test(MGSLPC_INFO *info)
4055 static unsigned char patterns[] =
4056 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
4057 static unsigned int count = sizeof(patterns) / sizeof(patterns[0]);
4060 unsigned long flags;
4062 spin_lock_irqsave(&info->lock,flags);
4065 for (i = 0; i < count; i++) {
4066 write_reg(info, XAD1, patterns[i]);
4067 write_reg(info, XAD2, patterns[(i + 1) % count]);
4068 if ((read_reg(info, XAD1) != patterns[i]) ||
4069 (read_reg(info, XAD2) != patterns[(i + 1) % count])) {
4075 spin_unlock_irqrestore(&info->lock,flags);
4079 BOOLEAN irq_test(MGSLPC_INFO *info)
4081 unsigned long end_time;
4082 unsigned long flags;
4084 spin_lock_irqsave(&info->lock,flags);
4087 info->testing_irq = TRUE;
4090 info->irq_occurred = FALSE;
4092 /* init hdlc mode */
4094 irq_enable(info, CHA, IRQ_TIMER);
4095 write_reg(info, CHA + TIMR, 0); /* 512 cycles */
4096 issue_command(info, CHA, CMD_START_TIMER);
4098 spin_unlock_irqrestore(&info->lock,flags);
4101 while(end_time-- && !info->irq_occurred) {
4102 msleep_interruptible(10);
4105 info->testing_irq = FALSE;
4107 spin_lock_irqsave(&info->lock,flags);
4109 spin_unlock_irqrestore(&info->lock,flags);
4111 return info->irq_occurred ? TRUE : FALSE;
4114 int adapter_test(MGSLPC_INFO *info)
4116 if (!register_test(info)) {
4117 info->init_error = DiagStatus_AddressFailure;
4118 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4119 __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
4123 if (!irq_test(info)) {
4124 info->init_error = DiagStatus_IrqFailure;
4125 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4126 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
4130 if (debug_level >= DEBUG_LEVEL_INFO)
4131 printk("%s(%d):device %s passed diagnostics\n",
4132 __FILE__,__LINE__,info->device_name);
4136 void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
4141 printk("%s tx data:\n",info->device_name);
4143 printk("%s rx data:\n",info->device_name);
4151 for(i=0;i<linecount;i++)
4152 printk("%02X ",(unsigned char)data[i]);
4155 for(i=0;i<linecount;i++) {
4156 if (data[i]>=040 && data[i]<=0176)
4157 printk("%c",data[i]);
4168 /* HDLC frame time out
4169 * update stats and do tx completion processing
4171 void tx_timeout(unsigned long context)
4173 MGSLPC_INFO *info = (MGSLPC_INFO*)context;
4174 unsigned long flags;
4176 if ( debug_level >= DEBUG_LEVEL_INFO )
4177 printk( "%s(%d):tx_timeout(%s)\n",
4178 __FILE__,__LINE__,info->device_name);
4179 if(info->tx_active &&
4180 info->params.mode == MGSL_MODE_HDLC) {
4181 info->icount.txtimeout++;
4183 spin_lock_irqsave(&info->lock,flags);
4184 info->tx_active = 0;
4185 info->tx_count = info->tx_put = info->tx_get = 0;
4187 spin_unlock_irqrestore(&info->lock,flags);
4191 hdlcdev_tx_done(info);
4200 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4201 * set encoding and frame check sequence (FCS) options
4203 * dev pointer to network device structure
4204 * encoding serial encoding setting
4205 * parity FCS setting
4207 * returns 0 if success, otherwise error code
4209 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
4210 unsigned short parity)
4212 MGSLPC_INFO *info = dev_to_port(dev);
4213 unsigned char new_encoding;
4214 unsigned short new_crctype;
4216 /* return error if TTY interface open */
4222 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
4223 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
4224 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
4225 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
4226 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
4227 default: return -EINVAL;
4232 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
4233 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
4234 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
4235 default: return -EINVAL;
4238 info->params.encoding = new_encoding;
4239 info->params.crc_type = new_crctype;;
4241 /* if network interface up, reprogram hardware */
4243 mgslpc_program_hw(info);
4249 * called by generic HDLC layer to send frame
4251 * skb socket buffer containing HDLC frame
4252 * dev pointer to network device structure
4254 * returns 0 if success, otherwise error code
4256 static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
4258 MGSLPC_INFO *info = dev_to_port(dev);
4259 struct net_device_stats *stats = hdlc_stats(dev);
4260 unsigned long flags;
4262 if (debug_level >= DEBUG_LEVEL_INFO)
4263 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
4265 /* stop sending until this frame completes */
4266 netif_stop_queue(dev);
4268 /* copy data to device buffers */
4269 memcpy(info->tx_buf, skb->data, skb->len);
4271 info->tx_put = info->tx_count = skb->len;
4273 /* update network statistics */
4274 stats->tx_packets++;
4275 stats->tx_bytes += skb->len;
4277 /* done with socket buffer, so free it */
4280 /* save start time for transmit timeout detection */
4281 dev->trans_start = jiffies;
4283 /* start hardware transmitter if necessary */
4284 spin_lock_irqsave(&info->lock,flags);
4285 if (!info->tx_active)
4287 spin_unlock_irqrestore(&info->lock,flags);
4293 * called by network layer when interface enabled
4294 * claim resources and initialize hardware
4296 * dev pointer to network device structure
4298 * returns 0 if success, otherwise error code
4300 static int hdlcdev_open(struct net_device *dev)
4302 MGSLPC_INFO *info = dev_to_port(dev);
4304 unsigned long flags;
4306 if (debug_level >= DEBUG_LEVEL_INFO)
4307 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
4309 /* generic HDLC layer open processing */
4310 if ((rc = hdlc_open(dev)))
4313 /* arbitrate between network and tty opens */
4314 spin_lock_irqsave(&info->netlock, flags);
4315 if (info->count != 0 || info->netcount != 0) {
4316 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
4317 spin_unlock_irqrestore(&info->netlock, flags);
4321 spin_unlock_irqrestore(&info->netlock, flags);
4323 /* claim resources and init adapter */
4324 if ((rc = startup(info)) != 0) {
4325 spin_lock_irqsave(&info->netlock, flags);
4327 spin_unlock_irqrestore(&info->netlock, flags);
4331 /* assert DTR and RTS, apply hardware settings */
4332 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
4333 mgslpc_program_hw(info);
4335 /* enable network layer transmit */
4336 dev->trans_start = jiffies;
4337 netif_start_queue(dev);
4339 /* inform generic HDLC layer of current DCD status */
4340 spin_lock_irqsave(&info->lock, flags);
4342 spin_unlock_irqrestore(&info->lock, flags);
4343 hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, dev);
4349 * called by network layer when interface is disabled
4350 * shutdown hardware and release resources
4352 * dev pointer to network device structure
4354 * returns 0 if success, otherwise error code
4356 static int hdlcdev_close(struct net_device *dev)
4358 MGSLPC_INFO *info = dev_to_port(dev);
4359 unsigned long flags;
4361 if (debug_level >= DEBUG_LEVEL_INFO)
4362 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
4364 netif_stop_queue(dev);
4366 /* shutdown adapter and release resources */
4371 spin_lock_irqsave(&info->netlock, flags);
4373 spin_unlock_irqrestore(&info->netlock, flags);
4379 * called by network layer to process IOCTL call to network device
4381 * dev pointer to network device structure
4382 * ifr pointer to network interface request structure
4383 * cmd IOCTL command code
4385 * returns 0 if success, otherwise error code
4387 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
4389 const size_t size = sizeof(sync_serial_settings);
4390 sync_serial_settings new_line;
4391 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
4392 MGSLPC_INFO *info = dev_to_port(dev);
4395 if (debug_level >= DEBUG_LEVEL_INFO)
4396 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
4398 /* return error if TTY interface open */
4402 if (cmd != SIOCWANDEV)
4403 return hdlc_ioctl(dev, ifr, cmd);
4405 switch(ifr->ifr_settings.type) {
4406 case IF_GET_IFACE: /* return current sync_serial_settings */
4408 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
4409 if (ifr->ifr_settings.size < size) {
4410 ifr->ifr_settings.size = size; /* data size wanted */
4414 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4415 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4416 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4417 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
4420 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
4421 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
4422 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
4423 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
4424 default: new_line.clock_type = CLOCK_DEFAULT;
4427 new_line.clock_rate = info->params.clock_speed;
4428 new_line.loopback = info->params.loopback ? 1:0;
4430 if (copy_to_user(line, &new_line, size))
4434 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
4436 if(!capable(CAP_NET_ADMIN))
4438 if (copy_from_user(&new_line, line, size))
4441 switch (new_line.clock_type)
4443 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
4444 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
4445 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
4446 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
4447 case CLOCK_DEFAULT: flags = info->params.flags &
4448 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4449 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4450 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4451 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
4452 default: return -EINVAL;
4455 if (new_line.loopback != 0 && new_line.loopback != 1)
4458 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4459 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4460 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4461 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
4462 info->params.flags |= flags;
4464 info->params.loopback = new_line.loopback;
4466 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
4467 info->params.clock_speed = new_line.clock_rate;
4469 info->params.clock_speed = 0;
4471 /* if network interface up, reprogram hardware */
4473 mgslpc_program_hw(info);
4477 return hdlc_ioctl(dev, ifr, cmd);
4482 * called by network layer when transmit timeout is detected
4484 * dev pointer to network device structure
4486 static void hdlcdev_tx_timeout(struct net_device *dev)
4488 MGSLPC_INFO *info = dev_to_port(dev);
4489 struct net_device_stats *stats = hdlc_stats(dev);
4490 unsigned long flags;
4492 if (debug_level >= DEBUG_LEVEL_INFO)
4493 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
4496 stats->tx_aborted_errors++;
4498 spin_lock_irqsave(&info->lock,flags);
4500 spin_unlock_irqrestore(&info->lock,flags);
4502 netif_wake_queue(dev);
4506 * called by device driver when transmit completes
4507 * reenable network layer transmit if stopped
4509 * info pointer to device instance information
4511 static void hdlcdev_tx_done(MGSLPC_INFO *info)
4513 if (netif_queue_stopped(info->netdev))
4514 netif_wake_queue(info->netdev);
4518 * called by device driver when frame received
4519 * pass frame to network layer
4521 * info pointer to device instance information
4522 * buf pointer to buffer contianing frame data
4523 * size count of data bytes in buf
4525 static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size)
4527 struct sk_buff *skb = dev_alloc_skb(size);
4528 struct net_device *dev = info->netdev;
4529 struct net_device_stats *stats = hdlc_stats(dev);
4531 if (debug_level >= DEBUG_LEVEL_INFO)
4532 printk("hdlcdev_rx(%s)\n",dev->name);
4535 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
4536 stats->rx_dropped++;
4540 memcpy(skb_put(skb, size),buf,size);
4542 skb->protocol = hdlc_type_trans(skb, info->netdev);
4544 stats->rx_packets++;
4545 stats->rx_bytes += size;
4549 info->netdev->last_rx = jiffies;
4553 * called by device driver when adding device instance
4554 * do generic HDLC initialization
4556 * info pointer to device instance information
4558 * returns 0 if success, otherwise error code
4560 static int hdlcdev_init(MGSLPC_INFO *info)
4563 struct net_device *dev;
4566 /* allocate and initialize network and HDLC layer objects */
4568 if (!(dev = alloc_hdlcdev(info))) {
4569 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
4573 /* for network layer reporting purposes only */
4574 dev->base_addr = info->io_base;
4575 dev->irq = info->irq_level;
4577 /* network layer callbacks and settings */
4578 dev->do_ioctl = hdlcdev_ioctl;
4579 dev->open = hdlcdev_open;
4580 dev->stop = hdlcdev_close;
4581 dev->tx_timeout = hdlcdev_tx_timeout;
4582 dev->watchdog_timeo = 10*HZ;
4583 dev->tx_queue_len = 50;
4585 /* generic HDLC layer callbacks and settings */
4586 hdlc = dev_to_hdlc(dev);
4587 hdlc->attach = hdlcdev_attach;
4588 hdlc->xmit = hdlcdev_xmit;
4590 /* register objects with HDLC layer */
4591 if ((rc = register_hdlc_device(dev))) {
4592 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
4602 * called by device driver when removing device instance
4603 * do generic HDLC cleanup
4605 * info pointer to device instance information
4607 static void hdlcdev_exit(MGSLPC_INFO *info)
4609 unregister_hdlc_device(info->netdev);
4610 free_netdev(info->netdev);
4611 info->netdev = NULL;
4614 #endif /* CONFIG_HDLC */