2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
6 * Device driver for Microgate SyncLink PC Card
7 * multiprotocol serial adapter.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * This code is released under the GNU General Public License (GPL)
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
31 # define BREAKPOINT() asm(" int $3");
33 # define BREAKPOINT() { }
36 #define MAX_DEVICE_COUNT 4
38 #include <linux/module.h>
39 #include <linux/errno.h>
40 #include <linux/signal.h>
41 #include <linux/sched.h>
42 #include <linux/timer.h>
43 #include <linux/time.h>
44 #include <linux/interrupt.h>
45 #include <linux/tty.h>
46 #include <linux/tty_flip.h>
47 #include <linux/serial.h>
48 #include <linux/major.h>
49 #include <linux/string.h>
50 #include <linux/fcntl.h>
51 #include <linux/ptrace.h>
52 #include <linux/ioport.h>
54 #include <linux/seq_file.h>
55 #include <linux/slab.h>
56 #include <linux/netdevice.h>
57 #include <linux/vmalloc.h>
58 #include <linux/init.h>
59 #include <linux/delay.h>
60 #include <linux/ioctl.h>
61 #include <linux/synclink.h>
63 #include <asm/system.h>
67 #include <linux/bitops.h>
68 #include <asm/types.h>
69 #include <linux/termios.h>
70 #include <linux/workqueue.h>
71 #include <linux/hdlc.h>
73 #include <pcmcia/cs.h>
74 #include <pcmcia/cistpl.h>
75 #include <pcmcia/cisreg.h>
76 #include <pcmcia/ds.h>
78 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE))
79 #define SYNCLINK_GENERIC_HDLC 1
81 #define SYNCLINK_GENERIC_HDLC 0
84 #define GET_USER(error,value,addr) error = get_user(value,addr)
85 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
86 #define PUT_USER(error,value,addr) error = put_user(value,addr)
87 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
89 #include <asm/uaccess.h>
91 static MGSL_PARAMS default_params
= {
92 MGSL_MODE_HDLC
, /* unsigned long mode */
93 0, /* unsigned char loopback; */
94 HDLC_FLAG_UNDERRUN_ABORT15
, /* unsigned short flags; */
95 HDLC_ENCODING_NRZI_SPACE
, /* unsigned char encoding; */
96 0, /* unsigned long clock_speed; */
97 0xff, /* unsigned char addr_filter; */
98 HDLC_CRC_16_CCITT
, /* unsigned short crc_type; */
99 HDLC_PREAMBLE_LENGTH_8BITS
, /* unsigned char preamble_length; */
100 HDLC_PREAMBLE_PATTERN_NONE
, /* unsigned char preamble; */
101 9600, /* unsigned long data_rate; */
102 8, /* unsigned char data_bits; */
103 1, /* unsigned char stop_bits; */
104 ASYNC_PARITY_NONE
/* unsigned char parity; */
110 unsigned char status
;
114 /* The queue of BH actions to be performed */
117 #define BH_TRANSMIT 2
120 #define IO_PIN_SHUTDOWN_LIMIT 100
122 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
124 struct _input_signal_events
{
137 * Device instance data structure
140 typedef struct _mgslpc_info
{
141 struct tty_port port
;
142 void *if_ptr
; /* General purpose pointer (used by SPPP) */
146 struct mgsl_icount icount
;
149 int x_char
; /* xon/xoff character */
150 unsigned char read_status_mask
;
151 unsigned char ignore_status_mask
;
153 unsigned char *tx_buf
;
158 /* circular list of fixed length rx buffers */
160 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
161 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
162 int rx_put
; /* index of next empty rx buffer */
163 int rx_get
; /* index of next full rx buffer */
164 int rx_buf_size
; /* size in bytes of single rx buffer */
165 int rx_buf_count
; /* total number of rx buffers */
166 int rx_frame_count
; /* number of full rx buffers */
168 wait_queue_head_t status_event_wait_q
;
169 wait_queue_head_t event_wait_q
;
170 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
171 struct _mgslpc_info
*next_device
; /* device list link */
173 unsigned short imra_value
;
174 unsigned short imrb_value
;
175 unsigned char pim_value
;
178 struct work_struct task
; /* task structure for scheduling bh */
187 int dcd_chkcount
; /* check counts to prevent */
188 int cts_chkcount
; /* too many IRQs if a signal */
189 int dsr_chkcount
; /* is floating */
200 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
202 char device_name
[25]; /* device instance name */
204 unsigned int io_base
; /* base I/O address of adapter */
205 unsigned int irq_level
;
207 MGSL_PARAMS params
; /* communications parameters */
209 unsigned char serial_signals
; /* current serial signal states */
211 bool irq_occurred
; /* for diagnostics use */
213 unsigned int init_error
; /* startup error (DIAGS) */
215 char flag_buf
[MAX_ASYNC_BUFFER_SIZE
];
216 bool drop_rts_on_tx_done
;
218 struct _input_signal_events input_signal_events
;
221 struct pcmcia_device
*p_dev
;
224 /* SPPP/Cisco HDLC device parts */
228 #if SYNCLINK_GENERIC_HDLC
229 struct net_device
*netdev
;
234 #define MGSLPC_MAGIC 0x5402
237 * The size of the serial xmit buffer is 1 page, or 4096 bytes
239 #define TXBUFSIZE 4096
242 #define CHA 0x00 /* channel A offset */
243 #define CHB 0x40 /* channel B offset */
246 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
293 #define IRQ_BREAK_ON BIT15 // rx break detected
294 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
295 #define IRQ_ALLSENT BIT13 // all sent
296 #define IRQ_UNDERRUN BIT12 // transmit data underrun
297 #define IRQ_TIMER BIT11 // timer interrupt
298 #define IRQ_CTS BIT10 // CTS status change
299 #define IRQ_TXREPEAT BIT9 // tx message repeat
300 #define IRQ_TXFIFO BIT8 // transmit pool ready
301 #define IRQ_RXEOM BIT7 // receive message end
302 #define IRQ_EXITHUNT BIT6 // receive frame start
303 #define IRQ_RXTIME BIT6 // rx char timeout
304 #define IRQ_DCD BIT2 // carrier detect status change
305 #define IRQ_OVERRUN BIT1 // receive frame overflow
306 #define IRQ_RXFIFO BIT0 // receive pool full
310 #define XFW BIT6 // transmit FIFO write enable
311 #define CEC BIT2 // command executing
312 #define CTS BIT1 // CTS state
317 #define PVR_AUTOCTS BIT3
318 #define PVR_RS232 0x20 /* 0010b */
319 #define PVR_V35 0xe0 /* 1110b */
320 #define PVR_RS422 0x40 /* 0100b */
322 /* Register access functions */
324 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
325 #define read_reg(info, reg) inb((info)->io_base + (reg))
327 #define read_reg16(info, reg) inw((info)->io_base + (reg))
328 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
330 #define set_reg_bits(info, reg, mask) \
331 write_reg(info, (reg), \
332 (unsigned char) (read_reg(info, (reg)) | (mask)))
333 #define clear_reg_bits(info, reg, mask) \
334 write_reg(info, (reg), \
335 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
337 * interrupt enable/disable routines
339 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
341 if (channel
== CHA
) {
342 info
->imra_value
|= mask
;
343 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
345 info
->imrb_value
|= mask
;
346 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
349 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
351 if (channel
== CHA
) {
352 info
->imra_value
&= ~mask
;
353 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
355 info
->imrb_value
&= ~mask
;
356 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
360 #define port_irq_disable(info, mask) \
361 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
363 #define port_irq_enable(info, mask) \
364 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
366 static void rx_start(MGSLPC_INFO
*info
);
367 static void rx_stop(MGSLPC_INFO
*info
);
369 static void tx_start(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
370 static void tx_stop(MGSLPC_INFO
*info
);
371 static void tx_set_idle(MGSLPC_INFO
*info
);
373 static void get_signals(MGSLPC_INFO
*info
);
374 static void set_signals(MGSLPC_INFO
*info
);
376 static void reset_device(MGSLPC_INFO
*info
);
378 static void hdlc_mode(MGSLPC_INFO
*info
);
379 static void async_mode(MGSLPC_INFO
*info
);
381 static void tx_timeout(unsigned long context
);
383 static int carrier_raised(struct tty_port
*port
);
384 static void dtr_rts(struct tty_port
*port
, int onoff
);
386 #if SYNCLINK_GENERIC_HDLC
387 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
388 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
389 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
390 static int hdlcdev_init(MGSLPC_INFO
*info
);
391 static void hdlcdev_exit(MGSLPC_INFO
*info
);
394 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
396 static bool register_test(MGSLPC_INFO
*info
);
397 static bool irq_test(MGSLPC_INFO
*info
);
398 static int adapter_test(MGSLPC_INFO
*info
);
400 static int claim_resources(MGSLPC_INFO
*info
);
401 static void release_resources(MGSLPC_INFO
*info
);
402 static void mgslpc_add_device(MGSLPC_INFO
*info
);
403 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
405 static bool rx_get_frame(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
406 static void rx_reset_buffers(MGSLPC_INFO
*info
);
407 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
408 static void rx_free_buffers(MGSLPC_INFO
*info
);
410 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
);
413 * Bottom half interrupt handlers
415 static void bh_handler(struct work_struct
*work
);
416 static void bh_transmit(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
417 static void bh_status(MGSLPC_INFO
*info
);
422 static int tiocmget(struct tty_struct
*tty
, struct file
*file
);
423 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
424 unsigned int set
, unsigned int clear
);
425 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
426 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
427 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
, struct tty_struct
*tty
);
428 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
429 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
430 static int set_txenable(MGSLPC_INFO
*info
, int enable
, struct tty_struct
*tty
);
431 static int tx_abort(MGSLPC_INFO
*info
);
432 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
433 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
435 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
436 static int mgslpc_device_count
= 0;
439 * Set this param to non-zero to load eax with the
440 * .text section address and breakpoint on module load.
441 * This is useful for use with gdb and add-symbol-file command.
443 static int break_on_load
=0;
446 * Driver major number, defaults to zero to get auto
447 * assigned major number. May be forced as module parameter.
449 static int ttymajor
=0;
451 static int debug_level
= 0;
452 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
454 module_param(break_on_load
, bool, 0);
455 module_param(ttymajor
, int, 0);
456 module_param(debug_level
, int, 0);
457 module_param_array(maxframe
, int, NULL
, 0);
459 MODULE_LICENSE("GPL");
461 static char *driver_name
= "SyncLink PC Card driver";
462 static char *driver_version
= "$Revision: 4.34 $";
464 static struct tty_driver
*serial_driver
;
466 /* number of characters left in xmit buffer before we ask for more */
467 #define WAKEUP_CHARS 256
469 static void mgslpc_change_params(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
470 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
472 /* PCMCIA prototypes */
474 static int mgslpc_config(struct pcmcia_device
*link
);
475 static void mgslpc_release(u_long arg
);
476 static void mgslpc_detach(struct pcmcia_device
*p_dev
);
479 * 1st function defined in .text section. Calling this function in
480 * init_module() followed by a breakpoint allows a remote debugger
481 * (gdb) to get the .text address for the add-symbol-file command.
482 * This allows remote debugging of dynamically loadable modules.
484 static void* mgslpc_get_text_ptr(void)
486 return mgslpc_get_text_ptr
;
490 * line discipline callback wrappers
492 * The wrappers maintain line discipline references
493 * while calling into the line discipline.
495 * ldisc_receive_buf - pass receive data to line discipline
498 static void ldisc_receive_buf(struct tty_struct
*tty
,
499 const __u8
*data
, char *flags
, int count
)
501 struct tty_ldisc
*ld
;
504 ld
= tty_ldisc_ref(tty
);
506 if (ld
->ops
->receive_buf
)
507 ld
->ops
->receive_buf(tty
, data
, flags
, count
);
512 static const struct tty_port_operations mgslpc_port_ops
= {
513 .carrier_raised
= carrier_raised
,
517 static int mgslpc_probe(struct pcmcia_device
*link
)
522 if (debug_level
>= DEBUG_LEVEL_INFO
)
523 printk("mgslpc_attach\n");
525 info
= kzalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
527 printk("Error can't allocate device instance data\n");
531 info
->magic
= MGSLPC_MAGIC
;
532 tty_port_init(&info
->port
);
533 info
->port
.ops
= &mgslpc_port_ops
;
534 INIT_WORK(&info
->task
, bh_handler
);
535 info
->max_frame_size
= 4096;
536 info
->port
.close_delay
= 5*HZ
/10;
537 info
->port
.closing_wait
= 30*HZ
;
538 init_waitqueue_head(&info
->status_event_wait_q
);
539 init_waitqueue_head(&info
->event_wait_q
);
540 spin_lock_init(&info
->lock
);
541 spin_lock_init(&info
->netlock
);
542 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
543 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
544 info
->imra_value
= 0xffff;
545 info
->imrb_value
= 0xffff;
546 info
->pim_value
= 0xff;
551 /* Initialize the struct pcmcia_device structure */
553 link
->conf
.Attributes
= 0;
554 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
556 ret
= mgslpc_config(link
);
560 mgslpc_add_device(info
);
565 /* Card has been inserted.
568 static int mgslpc_ioprobe(struct pcmcia_device
*p_dev
,
569 cistpl_cftable_entry_t
*cfg
,
570 cistpl_cftable_entry_t
*dflt
,
577 p_dev
->resource
[0]->start
= cfg
->io
.win
[0].base
;
578 p_dev
->resource
[0]->end
= cfg
->io
.win
[0].len
;
579 p_dev
->resource
[0]->flags
|= pcmcia_io_cfg_data_width(cfg
->io
.flags
);
580 p_dev
->io_lines
= cfg
->io
.flags
& CISTPL_IO_LINES_MASK
;
582 return pcmcia_request_io(p_dev
);
585 static int mgslpc_config(struct pcmcia_device
*link
)
587 MGSLPC_INFO
*info
= link
->priv
;
590 if (debug_level
>= DEBUG_LEVEL_INFO
)
591 printk("mgslpc_config(0x%p)\n", link
);
593 ret
= pcmcia_loop_config(link
, mgslpc_ioprobe
, NULL
);
597 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
598 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
599 link
->conf
.ConfigIndex
= 8;
600 link
->conf
.Present
= PRESENT_OPTION
;
602 ret
= pcmcia_request_irq(link
, mgslpc_isr
);
605 ret
= pcmcia_request_configuration(link
, &link
->conf
);
609 info
->io_base
= link
->resource
[0]->start
;
610 info
->irq_level
= link
->irq
;
612 dev_info(&link
->dev
, "index 0x%02x:",
613 link
->conf
.ConfigIndex
);
614 if (link
->conf
.Attributes
& CONF_ENABLE_IRQ
)
615 printk(", irq %d", link
->irq
);
616 if (link
->resource
[0])
617 printk(", io %pR", link
->resource
[0]);
622 mgslpc_release((u_long
)link
);
626 /* Card has been removed.
627 * Unregister device and release PCMCIA configuration.
628 * If device is open, postpone until it is closed.
630 static void mgslpc_release(u_long arg
)
632 struct pcmcia_device
*link
= (struct pcmcia_device
*)arg
;
634 if (debug_level
>= DEBUG_LEVEL_INFO
)
635 printk("mgslpc_release(0x%p)\n", link
);
637 pcmcia_disable_device(link
);
640 static void mgslpc_detach(struct pcmcia_device
*link
)
642 if (debug_level
>= DEBUG_LEVEL_INFO
)
643 printk("mgslpc_detach(0x%p)\n", link
);
645 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
646 mgslpc_release((u_long
)link
);
648 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
651 static int mgslpc_suspend(struct pcmcia_device
*link
)
653 MGSLPC_INFO
*info
= link
->priv
;
660 static int mgslpc_resume(struct pcmcia_device
*link
)
662 MGSLPC_INFO
*info
= link
->priv
;
670 static inline bool mgslpc_paranoia_check(MGSLPC_INFO
*info
,
671 char *name
, const char *routine
)
673 #ifdef MGSLPC_PARANOIA_CHECK
674 static const char *badmagic
=
675 "Warning: bad magic number for mgsl struct (%s) in %s\n";
676 static const char *badinfo
=
677 "Warning: null mgslpc_info for (%s) in %s\n";
680 printk(badinfo
, name
, routine
);
683 if (info
->magic
!= MGSLPC_MAGIC
) {
684 printk(badmagic
, name
, routine
);
695 #define CMD_RXFIFO BIT7 // release current rx FIFO
696 #define CMD_RXRESET BIT6 // receiver reset
697 #define CMD_RXFIFO_READ BIT5
698 #define CMD_START_TIMER BIT4
699 #define CMD_TXFIFO BIT3 // release current tx FIFO
700 #define CMD_TXEOM BIT1 // transmit end message
701 #define CMD_TXRESET BIT0 // transmit reset
703 static bool wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
706 /* wait for command completion */
707 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
715 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
717 wait_command_complete(info
, channel
);
718 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
721 static void tx_pause(struct tty_struct
*tty
)
723 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
726 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
728 if (debug_level
>= DEBUG_LEVEL_INFO
)
729 printk("tx_pause(%s)\n",info
->device_name
);
731 spin_lock_irqsave(&info
->lock
,flags
);
732 if (info
->tx_enabled
)
734 spin_unlock_irqrestore(&info
->lock
,flags
);
737 static void tx_release(struct tty_struct
*tty
)
739 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
742 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
744 if (debug_level
>= DEBUG_LEVEL_INFO
)
745 printk("tx_release(%s)\n",info
->device_name
);
747 spin_lock_irqsave(&info
->lock
,flags
);
748 if (!info
->tx_enabled
)
750 spin_unlock_irqrestore(&info
->lock
,flags
);
753 /* Return next bottom half action to perform.
754 * or 0 if nothing to do.
756 static int bh_action(MGSLPC_INFO
*info
)
761 spin_lock_irqsave(&info
->lock
,flags
);
763 if (info
->pending_bh
& BH_RECEIVE
) {
764 info
->pending_bh
&= ~BH_RECEIVE
;
766 } else if (info
->pending_bh
& BH_TRANSMIT
) {
767 info
->pending_bh
&= ~BH_TRANSMIT
;
769 } else if (info
->pending_bh
& BH_STATUS
) {
770 info
->pending_bh
&= ~BH_STATUS
;
775 /* Mark BH routine as complete */
776 info
->bh_running
= false;
777 info
->bh_requested
= false;
780 spin_unlock_irqrestore(&info
->lock
,flags
);
785 static void bh_handler(struct work_struct
*work
)
787 MGSLPC_INFO
*info
= container_of(work
, MGSLPC_INFO
, task
);
788 struct tty_struct
*tty
;
794 if (debug_level
>= DEBUG_LEVEL_BH
)
795 printk( "%s(%d):bh_handler(%s) entry\n",
796 __FILE__
,__LINE__
,info
->device_name
);
798 info
->bh_running
= true;
799 tty
= tty_port_tty_get(&info
->port
);
801 while((action
= bh_action(info
)) != 0) {
803 /* Process work item */
804 if ( debug_level
>= DEBUG_LEVEL_BH
)
805 printk( "%s(%d):bh_handler() work item action=%d\n",
806 __FILE__
,__LINE__
,action
);
811 while(rx_get_frame(info
, tty
));
814 bh_transmit(info
, tty
);
820 /* unknown work item ID */
821 printk("Unknown work item ID=%08X!\n", action
);
827 if (debug_level
>= DEBUG_LEVEL_BH
)
828 printk( "%s(%d):bh_handler(%s) exit\n",
829 __FILE__
,__LINE__
,info
->device_name
);
832 static void bh_transmit(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
834 if (debug_level
>= DEBUG_LEVEL_BH
)
835 printk("bh_transmit() entry on %s\n", info
->device_name
);
841 static void bh_status(MGSLPC_INFO
*info
)
843 info
->ri_chkcount
= 0;
844 info
->dsr_chkcount
= 0;
845 info
->dcd_chkcount
= 0;
846 info
->cts_chkcount
= 0;
849 /* eom: non-zero = end of frame */
850 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
852 unsigned char data
[2];
853 unsigned char fifo_count
, read_count
, i
;
854 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
856 if (debug_level
>= DEBUG_LEVEL_ISR
)
857 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__
,__LINE__
,eom
);
859 if (!info
->rx_enabled
)
862 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
863 /* no more free buffers */
864 issue_command(info
, CHA
, CMD_RXRESET
);
865 info
->pending_bh
|= BH_RECEIVE
;
866 info
->rx_overflow
= true;
867 info
->icount
.buf_overrun
++;
872 /* end of frame, get FIFO count from RBCL register */
873 if (!(fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f)))
879 if (fifo_count
== 1) {
881 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
884 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
886 fifo_count
-= read_count
;
887 if (!fifo_count
&& eom
)
888 buf
->status
= data
[--read_count
];
890 for (i
= 0; i
< read_count
; i
++) {
891 if (buf
->count
>= info
->max_frame_size
) {
892 /* frame too large, reset receiver and reset current buffer */
893 issue_command(info
, CHA
, CMD_RXRESET
);
897 *(buf
->data
+ buf
->count
) = data
[i
];
900 } while (fifo_count
);
903 info
->pending_bh
|= BH_RECEIVE
;
904 info
->rx_frame_count
++;
906 if (info
->rx_put
>= info
->rx_buf_count
)
909 issue_command(info
, CHA
, CMD_RXFIFO
);
912 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
, struct tty_struct
*tty
)
914 unsigned char data
, status
, flag
;
917 struct mgsl_icount
*icount
= &info
->icount
;
920 /* early termination, get FIFO count from RBCL register */
921 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
923 /* Zero fifo count could mean 0 or 32 bytes available.
924 * If BIT5 of STAR is set then at least 1 byte is available.
926 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
931 tty_buffer_request_room(tty
, fifo_count
);
932 /* Flush received async data to receive data buffer. */
934 data
= read_reg(info
, CHA
+ RXFIFO
);
935 status
= read_reg(info
, CHA
+ RXFIFO
);
941 // if no frameing/crc error then save data
943 // BIT6:framing error
945 if (status
& (BIT7
+ BIT6
)) {
951 /* discard char if tty control flags say so */
952 if (status
& info
->ignore_status_mask
)
955 status
&= info
->read_status_mask
;
959 else if (status
& BIT6
)
962 work
+= tty_insert_flip_char(tty
, data
, flag
);
964 issue_command(info
, CHA
, CMD_RXFIFO
);
966 if (debug_level
>= DEBUG_LEVEL_ISR
) {
967 printk("%s(%d):rx_ready_async",
969 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
970 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
971 icount
->parity
,icount
->frame
,icount
->overrun
);
975 tty_flip_buffer_push(tty
);
979 static void tx_done(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
981 if (!info
->tx_active
)
984 info
->tx_active
= false;
985 info
->tx_aborting
= false;
987 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
990 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
991 del_timer(&info
->tx_timer
);
993 if (info
->drop_rts_on_tx_done
) {
995 if (info
->serial_signals
& SerialSignal_RTS
) {
996 info
->serial_signals
&= ~SerialSignal_RTS
;
999 info
->drop_rts_on_tx_done
= false;
1002 #if SYNCLINK_GENERIC_HDLC
1004 hdlcdev_tx_done(info
);
1008 if (tty
->stopped
|| tty
->hw_stopped
) {
1012 info
->pending_bh
|= BH_TRANSMIT
;
1016 static void tx_ready(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1018 unsigned char fifo_count
= 32;
1021 if (debug_level
>= DEBUG_LEVEL_ISR
)
1022 printk("%s(%d):tx_ready(%s)\n", __FILE__
,__LINE__
,info
->device_name
);
1024 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1025 if (!info
->tx_active
)
1028 if (tty
->stopped
|| tty
->hw_stopped
) {
1032 if (!info
->tx_count
)
1033 info
->tx_active
= false;
1036 if (!info
->tx_count
)
1039 while (info
->tx_count
&& fifo_count
) {
1040 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1043 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1045 write_reg16(info
, CHA
+ TXFIFO
,
1046 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1048 info
->tx_count
-= c
;
1049 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1053 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1054 if (info
->tx_count
< WAKEUP_CHARS
)
1055 info
->pending_bh
|= BH_TRANSMIT
;
1056 issue_command(info
, CHA
, CMD_TXFIFO
);
1059 issue_command(info
, CHA
, CMD_TXFIFO
);
1061 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1065 static void cts_change(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1068 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1069 irq_disable(info
, CHB
, IRQ_CTS
);
1071 if (info
->serial_signals
& SerialSignal_CTS
)
1072 info
->input_signal_events
.cts_up
++;
1074 info
->input_signal_events
.cts_down
++;
1075 wake_up_interruptible(&info
->status_event_wait_q
);
1076 wake_up_interruptible(&info
->event_wait_q
);
1078 if (info
->port
.flags
& ASYNC_CTS_FLOW
) {
1079 if (tty
->hw_stopped
) {
1080 if (info
->serial_signals
& SerialSignal_CTS
) {
1081 if (debug_level
>= DEBUG_LEVEL_ISR
)
1082 printk("CTS tx start...");
1084 tty
->hw_stopped
= 0;
1085 tx_start(info
, tty
);
1086 info
->pending_bh
|= BH_TRANSMIT
;
1090 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1091 if (debug_level
>= DEBUG_LEVEL_ISR
)
1092 printk("CTS tx stop...");
1094 tty
->hw_stopped
= 1;
1099 info
->pending_bh
|= BH_STATUS
;
1102 static void dcd_change(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1105 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1106 irq_disable(info
, CHB
, IRQ_DCD
);
1108 if (info
->serial_signals
& SerialSignal_DCD
) {
1109 info
->input_signal_events
.dcd_up
++;
1112 info
->input_signal_events
.dcd_down
++;
1113 #if SYNCLINK_GENERIC_HDLC
1114 if (info
->netcount
) {
1115 if (info
->serial_signals
& SerialSignal_DCD
)
1116 netif_carrier_on(info
->netdev
);
1118 netif_carrier_off(info
->netdev
);
1121 wake_up_interruptible(&info
->status_event_wait_q
);
1122 wake_up_interruptible(&info
->event_wait_q
);
1124 if (info
->port
.flags
& ASYNC_CHECK_CD
) {
1125 if (debug_level
>= DEBUG_LEVEL_ISR
)
1126 printk("%s CD now %s...", info
->device_name
,
1127 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1128 if (info
->serial_signals
& SerialSignal_DCD
)
1129 wake_up_interruptible(&info
->port
.open_wait
);
1131 if (debug_level
>= DEBUG_LEVEL_ISR
)
1132 printk("doing serial hangup...");
1137 info
->pending_bh
|= BH_STATUS
;
1140 static void dsr_change(MGSLPC_INFO
*info
)
1143 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1144 port_irq_disable(info
, PVR_DSR
);
1146 if (info
->serial_signals
& SerialSignal_DSR
)
1147 info
->input_signal_events
.dsr_up
++;
1149 info
->input_signal_events
.dsr_down
++;
1150 wake_up_interruptible(&info
->status_event_wait_q
);
1151 wake_up_interruptible(&info
->event_wait_q
);
1152 info
->pending_bh
|= BH_STATUS
;
1155 static void ri_change(MGSLPC_INFO
*info
)
1158 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1159 port_irq_disable(info
, PVR_RI
);
1161 if (info
->serial_signals
& SerialSignal_RI
)
1162 info
->input_signal_events
.ri_up
++;
1164 info
->input_signal_events
.ri_down
++;
1165 wake_up_interruptible(&info
->status_event_wait_q
);
1166 wake_up_interruptible(&info
->event_wait_q
);
1167 info
->pending_bh
|= BH_STATUS
;
1170 /* Interrupt service routine entry point.
1174 * irq interrupt number that caused interrupt
1175 * dev_id device ID supplied during interrupt registration
1177 static irqreturn_t
mgslpc_isr(int dummy
, void *dev_id
)
1179 MGSLPC_INFO
*info
= dev_id
;
1180 struct tty_struct
*tty
;
1182 unsigned char gis
, pis
;
1185 if (debug_level
>= DEBUG_LEVEL_ISR
)
1186 printk("mgslpc_isr(%d) entry.\n", info
->irq_level
);
1188 if (!(info
->p_dev
->_locked
))
1191 tty
= tty_port_tty_get(&info
->port
);
1193 spin_lock(&info
->lock
);
1195 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1196 if (debug_level
>= DEBUG_LEVEL_ISR
)
1197 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1199 if ((gis
& 0x70) || count
> 1000) {
1200 printk("synclink_cs:hardware failed or ejected\n");
1205 if (gis
& (BIT1
+ BIT0
)) {
1206 isr
= read_reg16(info
, CHB
+ ISR
);
1208 dcd_change(info
, tty
);
1210 cts_change(info
, tty
);
1212 if (gis
& (BIT3
+ BIT2
))
1214 isr
= read_reg16(info
, CHA
+ ISR
);
1215 if (isr
& IRQ_TIMER
) {
1216 info
->irq_occurred
= true;
1217 irq_disable(info
, CHA
, IRQ_TIMER
);
1221 if (isr
& IRQ_EXITHUNT
) {
1222 info
->icount
.exithunt
++;
1223 wake_up_interruptible(&info
->event_wait_q
);
1225 if (isr
& IRQ_BREAK_ON
) {
1227 if (info
->port
.flags
& ASYNC_SAK
)
1230 if (isr
& IRQ_RXTIME
) {
1231 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1233 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1234 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1235 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1237 rx_ready_async(info
, isr
& IRQ_RXEOM
, tty
);
1241 if (isr
& IRQ_UNDERRUN
) {
1242 if (info
->tx_aborting
)
1243 info
->icount
.txabort
++;
1245 info
->icount
.txunder
++;
1248 else if (isr
& IRQ_ALLSENT
) {
1249 info
->icount
.txok
++;
1252 else if (isr
& IRQ_TXFIFO
)
1253 tx_ready(info
, tty
);
1256 pis
= read_reg(info
, CHA
+ PIS
);
1264 /* Request bottom half processing if there's something
1265 * for it to do and the bh is not already running
1268 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1269 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1270 printk("%s(%d):%s queueing bh task.\n",
1271 __FILE__
,__LINE__
,info
->device_name
);
1272 schedule_work(&info
->task
);
1273 info
->bh_requested
= true;
1276 spin_unlock(&info
->lock
);
1279 if (debug_level
>= DEBUG_LEVEL_ISR
)
1280 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1281 __FILE__
, __LINE__
, info
->irq_level
);
1286 /* Initialize and start device.
1288 static int startup(MGSLPC_INFO
* info
, struct tty_struct
*tty
)
1292 if (debug_level
>= DEBUG_LEVEL_INFO
)
1293 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1295 if (info
->port
.flags
& ASYNC_INITIALIZED
)
1298 if (!info
->tx_buf
) {
1299 /* allocate a page of memory for a transmit buffer */
1300 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1301 if (!info
->tx_buf
) {
1302 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1303 __FILE__
,__LINE__
,info
->device_name
);
1308 info
->pending_bh
= 0;
1310 memset(&info
->icount
, 0, sizeof(info
->icount
));
1312 setup_timer(&info
->tx_timer
, tx_timeout
, (unsigned long)info
);
1314 /* Allocate and claim adapter resources */
1315 retval
= claim_resources(info
);
1317 /* perform existance check and diagnostics */
1319 retval
= adapter_test(info
);
1322 if (capable(CAP_SYS_ADMIN
) && tty
)
1323 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1324 release_resources(info
);
1328 /* program hardware for current parameters */
1329 mgslpc_change_params(info
, tty
);
1332 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
1334 info
->port
.flags
|= ASYNC_INITIALIZED
;
1339 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1341 static void shutdown(MGSLPC_INFO
* info
, struct tty_struct
*tty
)
1343 unsigned long flags
;
1345 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
1348 if (debug_level
>= DEBUG_LEVEL_INFO
)
1349 printk("%s(%d):mgslpc_shutdown(%s)\n",
1350 __FILE__
,__LINE__
, info
->device_name
);
1352 /* clear status wait queue because status changes */
1353 /* can't happen after shutting down the hardware */
1354 wake_up_interruptible(&info
->status_event_wait_q
);
1355 wake_up_interruptible(&info
->event_wait_q
);
1357 del_timer_sync(&info
->tx_timer
);
1360 free_page((unsigned long) info
->tx_buf
);
1361 info
->tx_buf
= NULL
;
1364 spin_lock_irqsave(&info
->lock
,flags
);
1369 /* TODO:disable interrupts instead of reset to preserve signal states */
1372 if (!tty
|| tty
->termios
->c_cflag
& HUPCL
) {
1373 info
->serial_signals
&= ~(SerialSignal_DTR
+ SerialSignal_RTS
);
1377 spin_unlock_irqrestore(&info
->lock
,flags
);
1379 release_resources(info
);
1382 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1384 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1387 static void mgslpc_program_hw(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1389 unsigned long flags
;
1391 spin_lock_irqsave(&info
->lock
,flags
);
1395 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1397 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1404 info
->dcd_chkcount
= 0;
1405 info
->cts_chkcount
= 0;
1406 info
->ri_chkcount
= 0;
1407 info
->dsr_chkcount
= 0;
1409 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1410 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1413 if (info
->netcount
|| (tty
&& (tty
->termios
->c_cflag
& CREAD
)))
1416 spin_unlock_irqrestore(&info
->lock
,flags
);
1419 /* Reconfigure adapter based on new parameters
1421 static void mgslpc_change_params(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1426 if (!tty
|| !tty
->termios
)
1429 if (debug_level
>= DEBUG_LEVEL_INFO
)
1430 printk("%s(%d):mgslpc_change_params(%s)\n",
1431 __FILE__
,__LINE__
, info
->device_name
);
1433 cflag
= tty
->termios
->c_cflag
;
1435 /* if B0 rate (hangup) specified then negate DTR and RTS */
1436 /* otherwise assert DTR and RTS */
1438 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
1440 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
1442 /* byte size and parity */
1444 switch (cflag
& CSIZE
) {
1445 case CS5
: info
->params
.data_bits
= 5; break;
1446 case CS6
: info
->params
.data_bits
= 6; break;
1447 case CS7
: info
->params
.data_bits
= 7; break;
1448 case CS8
: info
->params
.data_bits
= 8; break;
1449 default: info
->params
.data_bits
= 7; break;
1453 info
->params
.stop_bits
= 2;
1455 info
->params
.stop_bits
= 1;
1457 info
->params
.parity
= ASYNC_PARITY_NONE
;
1458 if (cflag
& PARENB
) {
1460 info
->params
.parity
= ASYNC_PARITY_ODD
;
1462 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1465 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1469 /* calculate number of jiffies to transmit a full
1470 * FIFO (32 bytes) at specified data rate
1472 bits_per_char
= info
->params
.data_bits
+
1473 info
->params
.stop_bits
+ 1;
1475 /* if port data rate is set to 460800 or less then
1476 * allow tty settings to override, otherwise keep the
1477 * current data rate.
1479 if (info
->params
.data_rate
<= 460800) {
1480 info
->params
.data_rate
= tty_get_baud_rate(tty
);
1483 if ( info
->params
.data_rate
) {
1484 info
->timeout
= (32*HZ
*bits_per_char
) /
1485 info
->params
.data_rate
;
1487 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1489 if (cflag
& CRTSCTS
)
1490 info
->port
.flags
|= ASYNC_CTS_FLOW
;
1492 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
1495 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
1497 info
->port
.flags
|= ASYNC_CHECK_CD
;
1499 /* process tty input control flags */
1501 info
->read_status_mask
= 0;
1503 info
->read_status_mask
|= BIT7
| BIT6
;
1505 info
->ignore_status_mask
|= BIT7
| BIT6
;
1507 mgslpc_program_hw(info
, tty
);
1510 /* Add a character to the transmit buffer
1512 static int mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1514 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1515 unsigned long flags
;
1517 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1518 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1519 __FILE__
,__LINE__
,ch
,info
->device_name
);
1522 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1528 spin_lock_irqsave(&info
->lock
,flags
);
1530 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1531 if (info
->tx_count
< TXBUFSIZE
- 1) {
1532 info
->tx_buf
[info
->tx_put
++] = ch
;
1533 info
->tx_put
&= TXBUFSIZE
-1;
1538 spin_unlock_irqrestore(&info
->lock
,flags
);
1542 /* Enable transmitter so remaining characters in the
1543 * transmit buffer are sent.
1545 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1547 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1548 unsigned long flags
;
1550 if (debug_level
>= DEBUG_LEVEL_INFO
)
1551 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1552 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1554 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1557 if (info
->tx_count
<= 0 || tty
->stopped
||
1558 tty
->hw_stopped
|| !info
->tx_buf
)
1561 if (debug_level
>= DEBUG_LEVEL_INFO
)
1562 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1563 __FILE__
,__LINE__
,info
->device_name
);
1565 spin_lock_irqsave(&info
->lock
,flags
);
1566 if (!info
->tx_active
)
1567 tx_start(info
, tty
);
1568 spin_unlock_irqrestore(&info
->lock
,flags
);
1571 /* Send a block of data
1575 * tty pointer to tty information structure
1576 * buf pointer to buffer containing send data
1577 * count size of send data in bytes
1579 * Returns: number of characters written
1581 static int mgslpc_write(struct tty_struct
* tty
,
1582 const unsigned char *buf
, int count
)
1585 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1586 unsigned long flags
;
1588 if (debug_level
>= DEBUG_LEVEL_INFO
)
1589 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1590 __FILE__
,__LINE__
,info
->device_name
,count
);
1592 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1596 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1597 if (count
> TXBUFSIZE
) {
1601 if (info
->tx_active
)
1603 else if (info
->tx_count
)
1609 min(TXBUFSIZE
- info
->tx_count
- 1,
1610 TXBUFSIZE
- info
->tx_put
));
1614 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1616 spin_lock_irqsave(&info
->lock
,flags
);
1617 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1618 info
->tx_count
+= c
;
1619 spin_unlock_irqrestore(&info
->lock
,flags
);
1626 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
1627 spin_lock_irqsave(&info
->lock
,flags
);
1628 if (!info
->tx_active
)
1629 tx_start(info
, tty
);
1630 spin_unlock_irqrestore(&info
->lock
,flags
);
1633 if (debug_level
>= DEBUG_LEVEL_INFO
)
1634 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1635 __FILE__
,__LINE__
,info
->device_name
,ret
);
1639 /* Return the count of free bytes in transmit buffer
1641 static int mgslpc_write_room(struct tty_struct
*tty
)
1643 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1646 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1649 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1650 /* HDLC (frame oriented) mode */
1651 if (info
->tx_active
)
1654 return HDLC_MAX_FRAME_SIZE
;
1656 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1661 if (debug_level
>= DEBUG_LEVEL_INFO
)
1662 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1663 __FILE__
,__LINE__
, info
->device_name
, ret
);
1667 /* Return the count of bytes in transmit buffer
1669 static int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1671 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1674 if (debug_level
>= DEBUG_LEVEL_INFO
)
1675 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1676 __FILE__
,__LINE__
, info
->device_name
);
1678 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1681 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1682 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1684 rc
= info
->tx_count
;
1686 if (debug_level
>= DEBUG_LEVEL_INFO
)
1687 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1688 __FILE__
,__LINE__
, info
->device_name
, rc
);
1693 /* Discard all data in the send buffer
1695 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1697 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1698 unsigned long flags
;
1700 if (debug_level
>= DEBUG_LEVEL_INFO
)
1701 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1702 __FILE__
,__LINE__
, info
->device_name
);
1704 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1707 spin_lock_irqsave(&info
->lock
,flags
);
1708 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1709 del_timer(&info
->tx_timer
);
1710 spin_unlock_irqrestore(&info
->lock
,flags
);
1712 wake_up_interruptible(&tty
->write_wait
);
1716 /* Send a high-priority XON/XOFF character
1718 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1720 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1721 unsigned long flags
;
1723 if (debug_level
>= DEBUG_LEVEL_INFO
)
1724 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1725 __FILE__
,__LINE__
, info
->device_name
, ch
);
1727 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1732 spin_lock_irqsave(&info
->lock
,flags
);
1733 if (!info
->tx_enabled
)
1734 tx_start(info
, tty
);
1735 spin_unlock_irqrestore(&info
->lock
,flags
);
1739 /* Signal remote device to throttle send data (our receive data)
1741 static void mgslpc_throttle(struct tty_struct
* tty
)
1743 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1744 unsigned long flags
;
1746 if (debug_level
>= DEBUG_LEVEL_INFO
)
1747 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1748 __FILE__
,__LINE__
, info
->device_name
);
1750 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1754 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1756 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1757 spin_lock_irqsave(&info
->lock
,flags
);
1758 info
->serial_signals
&= ~SerialSignal_RTS
;
1760 spin_unlock_irqrestore(&info
->lock
,flags
);
1764 /* Signal remote device to stop throttling send data (our receive data)
1766 static void mgslpc_unthrottle(struct tty_struct
* tty
)
1768 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1769 unsigned long flags
;
1771 if (debug_level
>= DEBUG_LEVEL_INFO
)
1772 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1773 __FILE__
,__LINE__
, info
->device_name
);
1775 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1782 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1785 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1786 spin_lock_irqsave(&info
->lock
,flags
);
1787 info
->serial_signals
|= SerialSignal_RTS
;
1789 spin_unlock_irqrestore(&info
->lock
,flags
);
1793 /* get the current serial statistics
1795 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1798 if (debug_level
>= DEBUG_LEVEL_INFO
)
1799 printk("get_params(%s)\n", info
->device_name
);
1801 memset(&info
->icount
, 0, sizeof(info
->icount
));
1803 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1810 /* get the current serial parameters
1812 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1815 if (debug_level
>= DEBUG_LEVEL_INFO
)
1816 printk("get_params(%s)\n", info
->device_name
);
1817 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1823 /* set the serial parameters
1827 * info pointer to device instance data
1828 * new_params user buffer containing new serial params
1830 * Returns: 0 if success, otherwise error code
1832 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
, struct tty_struct
*tty
)
1834 unsigned long flags
;
1835 MGSL_PARAMS tmp_params
;
1838 if (debug_level
>= DEBUG_LEVEL_INFO
)
1839 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1840 info
->device_name
);
1841 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1843 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1844 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1845 __FILE__
,__LINE__
,info
->device_name
);
1849 spin_lock_irqsave(&info
->lock
,flags
);
1850 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
1851 spin_unlock_irqrestore(&info
->lock
,flags
);
1853 mgslpc_change_params(info
, tty
);
1858 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
1861 if (debug_level
>= DEBUG_LEVEL_INFO
)
1862 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
1863 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
1869 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
1871 unsigned long flags
;
1872 if (debug_level
>= DEBUG_LEVEL_INFO
)
1873 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
1874 spin_lock_irqsave(&info
->lock
,flags
);
1875 info
->idle_mode
= idle_mode
;
1877 spin_unlock_irqrestore(&info
->lock
,flags
);
1881 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
1884 if (debug_level
>= DEBUG_LEVEL_INFO
)
1885 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
1886 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
1892 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
1894 unsigned long flags
;
1896 if (debug_level
>= DEBUG_LEVEL_INFO
)
1897 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
1898 spin_lock_irqsave(&info
->lock
,flags
);
1899 info
->if_mode
= if_mode
;
1901 val
= read_reg(info
, PVR
) & 0x0f;
1902 switch (info
->if_mode
)
1904 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
1905 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
1906 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
1908 write_reg(info
, PVR
, val
);
1910 spin_unlock_irqrestore(&info
->lock
,flags
);
1914 static int set_txenable(MGSLPC_INFO
* info
, int enable
, struct tty_struct
*tty
)
1916 unsigned long flags
;
1918 if (debug_level
>= DEBUG_LEVEL_INFO
)
1919 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
1921 spin_lock_irqsave(&info
->lock
,flags
);
1923 if (!info
->tx_enabled
)
1924 tx_start(info
, tty
);
1926 if (info
->tx_enabled
)
1929 spin_unlock_irqrestore(&info
->lock
,flags
);
1933 static int tx_abort(MGSLPC_INFO
* info
)
1935 unsigned long flags
;
1937 if (debug_level
>= DEBUG_LEVEL_INFO
)
1938 printk("tx_abort(%s)\n", info
->device_name
);
1940 spin_lock_irqsave(&info
->lock
,flags
);
1941 if (info
->tx_active
&& info
->tx_count
&&
1942 info
->params
.mode
== MGSL_MODE_HDLC
) {
1943 /* clear data count so FIFO is not filled on next IRQ.
1944 * This results in underrun and abort transmission.
1946 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1947 info
->tx_aborting
= true;
1949 spin_unlock_irqrestore(&info
->lock
,flags
);
1953 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
1955 unsigned long flags
;
1957 if (debug_level
>= DEBUG_LEVEL_INFO
)
1958 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
1960 spin_lock_irqsave(&info
->lock
,flags
);
1962 if (!info
->rx_enabled
)
1965 if (info
->rx_enabled
)
1968 spin_unlock_irqrestore(&info
->lock
,flags
);
1972 /* wait for specified event to occur
1974 * Arguments: info pointer to device instance data
1975 * mask pointer to bitmask of events to wait for
1976 * Return Value: 0 if successful and bit mask updated with
1977 * of events triggerred,
1978 * otherwise error code
1980 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
1982 unsigned long flags
;
1985 struct mgsl_icount cprev
, cnow
;
1988 struct _input_signal_events oldsigs
, newsigs
;
1989 DECLARE_WAITQUEUE(wait
, current
);
1991 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
1995 if (debug_level
>= DEBUG_LEVEL_INFO
)
1996 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
1998 spin_lock_irqsave(&info
->lock
,flags
);
2000 /* return immediately if state matches requested events */
2002 s
= info
->serial_signals
;
2004 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
2005 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
2006 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
2007 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
2009 spin_unlock_irqrestore(&info
->lock
,flags
);
2013 /* save current irq counts */
2014 cprev
= info
->icount
;
2015 oldsigs
= info
->input_signal_events
;
2017 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
2018 (mask
& MgslEvent_ExitHuntMode
))
2019 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
2021 set_current_state(TASK_INTERRUPTIBLE
);
2022 add_wait_queue(&info
->event_wait_q
, &wait
);
2024 spin_unlock_irqrestore(&info
->lock
,flags
);
2029 if (signal_pending(current
)) {
2034 /* get current irq counts */
2035 spin_lock_irqsave(&info
->lock
,flags
);
2036 cnow
= info
->icount
;
2037 newsigs
= info
->input_signal_events
;
2038 set_current_state(TASK_INTERRUPTIBLE
);
2039 spin_unlock_irqrestore(&info
->lock
,flags
);
2041 /* if no change, wait aborted for some reason */
2042 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2043 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2044 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2045 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2046 newsigs
.cts_up
== oldsigs
.cts_up
&&
2047 newsigs
.cts_down
== oldsigs
.cts_down
&&
2048 newsigs
.ri_up
== oldsigs
.ri_up
&&
2049 newsigs
.ri_down
== oldsigs
.ri_down
&&
2050 cnow
.exithunt
== cprev
.exithunt
&&
2051 cnow
.rxidle
== cprev
.rxidle
) {
2057 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2058 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2059 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2060 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2061 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2062 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2063 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2064 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2065 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2066 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2074 remove_wait_queue(&info
->event_wait_q
, &wait
);
2075 set_current_state(TASK_RUNNING
);
2077 if (mask
& MgslEvent_ExitHuntMode
) {
2078 spin_lock_irqsave(&info
->lock
,flags
);
2079 if (!waitqueue_active(&info
->event_wait_q
))
2080 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2081 spin_unlock_irqrestore(&info
->lock
,flags
);
2085 PUT_USER(rc
, events
, mask_ptr
);
2089 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2091 unsigned long flags
;
2093 struct mgsl_icount cprev
, cnow
;
2094 DECLARE_WAITQUEUE(wait
, current
);
2096 /* save current irq counts */
2097 spin_lock_irqsave(&info
->lock
,flags
);
2098 cprev
= info
->icount
;
2099 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2100 set_current_state(TASK_INTERRUPTIBLE
);
2101 spin_unlock_irqrestore(&info
->lock
,flags
);
2105 if (signal_pending(current
)) {
2110 /* get new irq counts */
2111 spin_lock_irqsave(&info
->lock
,flags
);
2112 cnow
= info
->icount
;
2113 set_current_state(TASK_INTERRUPTIBLE
);
2114 spin_unlock_irqrestore(&info
->lock
,flags
);
2116 /* if no change, wait aborted for some reason */
2117 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2118 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2123 /* check for change in caller specified modem input */
2124 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2125 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2126 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2127 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2134 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2135 set_current_state(TASK_RUNNING
);
2139 /* return the state of the serial control and status signals
2141 static int tiocmget(struct tty_struct
*tty
, struct file
*file
)
2143 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2144 unsigned int result
;
2145 unsigned long flags
;
2147 spin_lock_irqsave(&info
->lock
,flags
);
2149 spin_unlock_irqrestore(&info
->lock
,flags
);
2151 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2152 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2153 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2154 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2155 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2156 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2158 if (debug_level
>= DEBUG_LEVEL_INFO
)
2159 printk("%s(%d):%s tiocmget() value=%08X\n",
2160 __FILE__
,__LINE__
, info
->device_name
, result
);
2164 /* set modem control signals (DTR/RTS)
2166 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
2167 unsigned int set
, unsigned int clear
)
2169 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2170 unsigned long flags
;
2172 if (debug_level
>= DEBUG_LEVEL_INFO
)
2173 printk("%s(%d):%s tiocmset(%x,%x)\n",
2174 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
2176 if (set
& TIOCM_RTS
)
2177 info
->serial_signals
|= SerialSignal_RTS
;
2178 if (set
& TIOCM_DTR
)
2179 info
->serial_signals
|= SerialSignal_DTR
;
2180 if (clear
& TIOCM_RTS
)
2181 info
->serial_signals
&= ~SerialSignal_RTS
;
2182 if (clear
& TIOCM_DTR
)
2183 info
->serial_signals
&= ~SerialSignal_DTR
;
2185 spin_lock_irqsave(&info
->lock
,flags
);
2187 spin_unlock_irqrestore(&info
->lock
,flags
);
2192 /* Set or clear transmit break condition
2194 * Arguments: tty pointer to tty instance data
2195 * break_state -1=set break condition, 0=clear
2197 static int mgslpc_break(struct tty_struct
*tty
, int break_state
)
2199 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2200 unsigned long flags
;
2202 if (debug_level
>= DEBUG_LEVEL_INFO
)
2203 printk("%s(%d):mgslpc_break(%s,%d)\n",
2204 __FILE__
,__LINE__
, info
->device_name
, break_state
);
2206 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2209 spin_lock_irqsave(&info
->lock
,flags
);
2210 if (break_state
== -1)
2211 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2213 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2214 spin_unlock_irqrestore(&info
->lock
,flags
);
2218 /* Service an IOCTL request
2222 * tty pointer to tty instance data
2223 * file pointer to associated file object for device
2224 * cmd IOCTL command code
2225 * arg command argument/context
2227 * Return Value: 0 if success, otherwise error code
2229 static int mgslpc_ioctl(struct tty_struct
*tty
, struct file
* file
,
2230 unsigned int cmd
, unsigned long arg
)
2232 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2234 struct mgsl_icount cnow
; /* kernel counter temps */
2235 struct serial_icounter_struct __user
*p_cuser
; /* user space */
2236 void __user
*argp
= (void __user
*)arg
;
2237 unsigned long flags
;
2239 if (debug_level
>= DEBUG_LEVEL_INFO
)
2240 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2241 info
->device_name
, cmd
);
2243 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2246 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2247 (cmd
!= TIOCMIWAIT
) && (cmd
!= TIOCGICOUNT
)) {
2248 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2253 case MGSL_IOCGPARAMS
:
2254 return get_params(info
, argp
);
2255 case MGSL_IOCSPARAMS
:
2256 return set_params(info
, argp
, tty
);
2257 case MGSL_IOCGTXIDLE
:
2258 return get_txidle(info
, argp
);
2259 case MGSL_IOCSTXIDLE
:
2260 return set_txidle(info
, (int)arg
);
2262 return get_interface(info
, argp
);
2264 return set_interface(info
,(int)arg
);
2265 case MGSL_IOCTXENABLE
:
2266 return set_txenable(info
,(int)arg
, tty
);
2267 case MGSL_IOCRXENABLE
:
2268 return set_rxenable(info
,(int)arg
);
2269 case MGSL_IOCTXABORT
:
2270 return tx_abort(info
);
2271 case MGSL_IOCGSTATS
:
2272 return get_stats(info
, argp
);
2273 case MGSL_IOCWAITEVENT
:
2274 return wait_events(info
, argp
);
2276 return modem_input_wait(info
,(int)arg
);
2278 spin_lock_irqsave(&info
->lock
,flags
);
2279 cnow
= info
->icount
;
2280 spin_unlock_irqrestore(&info
->lock
,flags
);
2282 PUT_USER(error
,cnow
.cts
, &p_cuser
->cts
);
2283 if (error
) return error
;
2284 PUT_USER(error
,cnow
.dsr
, &p_cuser
->dsr
);
2285 if (error
) return error
;
2286 PUT_USER(error
,cnow
.rng
, &p_cuser
->rng
);
2287 if (error
) return error
;
2288 PUT_USER(error
,cnow
.dcd
, &p_cuser
->dcd
);
2289 if (error
) return error
;
2290 PUT_USER(error
,cnow
.rx
, &p_cuser
->rx
);
2291 if (error
) return error
;
2292 PUT_USER(error
,cnow
.tx
, &p_cuser
->tx
);
2293 if (error
) return error
;
2294 PUT_USER(error
,cnow
.frame
, &p_cuser
->frame
);
2295 if (error
) return error
;
2296 PUT_USER(error
,cnow
.overrun
, &p_cuser
->overrun
);
2297 if (error
) return error
;
2298 PUT_USER(error
,cnow
.parity
, &p_cuser
->parity
);
2299 if (error
) return error
;
2300 PUT_USER(error
,cnow
.brk
, &p_cuser
->brk
);
2301 if (error
) return error
;
2302 PUT_USER(error
,cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
2303 if (error
) return error
;
2306 return -ENOIOCTLCMD
;
2311 /* Set new termios settings
2315 * tty pointer to tty structure
2316 * termios pointer to buffer to hold returned old termios
2318 static void mgslpc_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2320 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2321 unsigned long flags
;
2323 if (debug_level
>= DEBUG_LEVEL_INFO
)
2324 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2325 tty
->driver
->name
);
2327 /* just return if nothing has changed */
2328 if ((tty
->termios
->c_cflag
== old_termios
->c_cflag
)
2329 && (RELEVANT_IFLAG(tty
->termios
->c_iflag
)
2330 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2333 mgslpc_change_params(info
, tty
);
2335 /* Handle transition to B0 status */
2336 if (old_termios
->c_cflag
& CBAUD
&&
2337 !(tty
->termios
->c_cflag
& CBAUD
)) {
2338 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2339 spin_lock_irqsave(&info
->lock
,flags
);
2341 spin_unlock_irqrestore(&info
->lock
,flags
);
2344 /* Handle transition away from B0 status */
2345 if (!(old_termios
->c_cflag
& CBAUD
) &&
2346 tty
->termios
->c_cflag
& CBAUD
) {
2347 info
->serial_signals
|= SerialSignal_DTR
;
2348 if (!(tty
->termios
->c_cflag
& CRTSCTS
) ||
2349 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2350 info
->serial_signals
|= SerialSignal_RTS
;
2352 spin_lock_irqsave(&info
->lock
,flags
);
2354 spin_unlock_irqrestore(&info
->lock
,flags
);
2357 /* Handle turning off CRTSCTS */
2358 if (old_termios
->c_cflag
& CRTSCTS
&&
2359 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2360 tty
->hw_stopped
= 0;
2365 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2367 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2368 struct tty_port
*port
= &info
->port
;
2370 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2373 if (debug_level
>= DEBUG_LEVEL_INFO
)
2374 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2375 __FILE__
,__LINE__
, info
->device_name
, port
->count
);
2377 WARN_ON(!port
->count
);
2379 if (tty_port_close_start(port
, tty
, filp
) == 0)
2382 if (port
->flags
& ASYNC_INITIALIZED
)
2383 mgslpc_wait_until_sent(tty
, info
->timeout
);
2385 mgslpc_flush_buffer(tty
);
2387 tty_ldisc_flush(tty
);
2388 shutdown(info
, tty
);
2390 tty_port_close_end(port
, tty
);
2391 tty_port_tty_set(port
, NULL
);
2393 if (debug_level
>= DEBUG_LEVEL_INFO
)
2394 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2395 tty
->driver
->name
, port
->count
);
2398 /* Wait until the transmitter is empty.
2400 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2402 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2403 unsigned long orig_jiffies
, char_time
;
2408 if (debug_level
>= DEBUG_LEVEL_INFO
)
2409 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2410 __FILE__
,__LINE__
, info
->device_name
);
2412 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2415 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
2418 orig_jiffies
= jiffies
;
2420 /* Set check interval to 1/5 of estimated time to
2421 * send a character, and make it at least 1. The check
2422 * interval should also be less than the timeout.
2423 * Note: use tight timings here to satisfy the NIST-PCTS.
2426 if ( info
->params
.data_rate
) {
2427 char_time
= info
->timeout
/(32 * 5);
2434 char_time
= min_t(unsigned long, char_time
, timeout
);
2436 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2437 while (info
->tx_active
) {
2438 msleep_interruptible(jiffies_to_msecs(char_time
));
2439 if (signal_pending(current
))
2441 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2445 while ((info
->tx_count
|| info
->tx_active
) &&
2447 msleep_interruptible(jiffies_to_msecs(char_time
));
2448 if (signal_pending(current
))
2450 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2456 if (debug_level
>= DEBUG_LEVEL_INFO
)
2457 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2458 __FILE__
,__LINE__
, info
->device_name
);
2461 /* Called by tty_hangup() when a hangup is signaled.
2462 * This is the same as closing all open files for the port.
2464 static void mgslpc_hangup(struct tty_struct
*tty
)
2466 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2468 if (debug_level
>= DEBUG_LEVEL_INFO
)
2469 printk("%s(%d):mgslpc_hangup(%s)\n",
2470 __FILE__
,__LINE__
, info
->device_name
);
2472 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2475 mgslpc_flush_buffer(tty
);
2476 shutdown(info
, tty
);
2477 tty_port_hangup(&info
->port
);
2480 static int carrier_raised(struct tty_port
*port
)
2482 MGSLPC_INFO
*info
= container_of(port
, MGSLPC_INFO
, port
);
2483 unsigned long flags
;
2485 spin_lock_irqsave(&info
->lock
,flags
);
2487 spin_unlock_irqrestore(&info
->lock
,flags
);
2489 if (info
->serial_signals
& SerialSignal_DCD
)
2494 static void dtr_rts(struct tty_port
*port
, int onoff
)
2496 MGSLPC_INFO
*info
= container_of(port
, MGSLPC_INFO
, port
);
2497 unsigned long flags
;
2499 spin_lock_irqsave(&info
->lock
,flags
);
2501 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2503 info
->serial_signals
&= ~SerialSignal_RTS
+ SerialSignal_DTR
;
2505 spin_unlock_irqrestore(&info
->lock
,flags
);
2509 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2512 struct tty_port
*port
;
2514 unsigned long flags
;
2516 /* verify range of specified line number */
2518 if ((line
< 0) || (line
>= mgslpc_device_count
)) {
2519 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2520 __FILE__
,__LINE__
,line
);
2524 /* find the info structure for the specified line */
2525 info
= mgslpc_device_list
;
2526 while(info
&& info
->line
!= line
)
2527 info
= info
->next_device
;
2528 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2532 tty
->driver_data
= info
;
2533 tty_port_tty_set(port
, tty
);
2535 if (debug_level
>= DEBUG_LEVEL_INFO
)
2536 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2537 __FILE__
,__LINE__
,tty
->driver
->name
, port
->count
);
2539 /* If port is closing, signal caller to try again */
2540 if (tty_hung_up_p(filp
) || port
->flags
& ASYNC_CLOSING
){
2541 if (port
->flags
& ASYNC_CLOSING
)
2542 interruptible_sleep_on(&port
->close_wait
);
2543 retval
= ((port
->flags
& ASYNC_HUP_NOTIFY
) ?
2544 -EAGAIN
: -ERESTARTSYS
);
2548 tty
->low_latency
= (port
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2550 spin_lock_irqsave(&info
->netlock
, flags
);
2551 if (info
->netcount
) {
2553 spin_unlock_irqrestore(&info
->netlock
, flags
);
2556 spin_lock(&port
->lock
);
2558 spin_unlock(&port
->lock
);
2559 spin_unlock_irqrestore(&info
->netlock
, flags
);
2561 if (port
->count
== 1) {
2562 /* 1st open on this device, init hardware */
2563 retval
= startup(info
, tty
);
2568 retval
= tty_port_block_til_ready(&info
->port
, tty
, filp
);
2570 if (debug_level
>= DEBUG_LEVEL_INFO
)
2571 printk("%s(%d):block_til_ready(%s) returned %d\n",
2572 __FILE__
,__LINE__
, info
->device_name
, retval
);
2576 if (debug_level
>= DEBUG_LEVEL_INFO
)
2577 printk("%s(%d):mgslpc_open(%s) success\n",
2578 __FILE__
,__LINE__
, info
->device_name
);
2586 * /proc fs routines....
2589 static inline void line_info(struct seq_file
*m
, MGSLPC_INFO
*info
)
2592 unsigned long flags
;
2594 seq_printf(m
, "%s:io:%04X irq:%d",
2595 info
->device_name
, info
->io_base
, info
->irq_level
);
2597 /* output current serial signal states */
2598 spin_lock_irqsave(&info
->lock
,flags
);
2600 spin_unlock_irqrestore(&info
->lock
,flags
);
2604 if (info
->serial_signals
& SerialSignal_RTS
)
2605 strcat(stat_buf
, "|RTS");
2606 if (info
->serial_signals
& SerialSignal_CTS
)
2607 strcat(stat_buf
, "|CTS");
2608 if (info
->serial_signals
& SerialSignal_DTR
)
2609 strcat(stat_buf
, "|DTR");
2610 if (info
->serial_signals
& SerialSignal_DSR
)
2611 strcat(stat_buf
, "|DSR");
2612 if (info
->serial_signals
& SerialSignal_DCD
)
2613 strcat(stat_buf
, "|CD");
2614 if (info
->serial_signals
& SerialSignal_RI
)
2615 strcat(stat_buf
, "|RI");
2617 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2618 seq_printf(m
, " HDLC txok:%d rxok:%d",
2619 info
->icount
.txok
, info
->icount
.rxok
);
2620 if (info
->icount
.txunder
)
2621 seq_printf(m
, " txunder:%d", info
->icount
.txunder
);
2622 if (info
->icount
.txabort
)
2623 seq_printf(m
, " txabort:%d", info
->icount
.txabort
);
2624 if (info
->icount
.rxshort
)
2625 seq_printf(m
, " rxshort:%d", info
->icount
.rxshort
);
2626 if (info
->icount
.rxlong
)
2627 seq_printf(m
, " rxlong:%d", info
->icount
.rxlong
);
2628 if (info
->icount
.rxover
)
2629 seq_printf(m
, " rxover:%d", info
->icount
.rxover
);
2630 if (info
->icount
.rxcrc
)
2631 seq_printf(m
, " rxcrc:%d", info
->icount
.rxcrc
);
2633 seq_printf(m
, " ASYNC tx:%d rx:%d",
2634 info
->icount
.tx
, info
->icount
.rx
);
2635 if (info
->icount
.frame
)
2636 seq_printf(m
, " fe:%d", info
->icount
.frame
);
2637 if (info
->icount
.parity
)
2638 seq_printf(m
, " pe:%d", info
->icount
.parity
);
2639 if (info
->icount
.brk
)
2640 seq_printf(m
, " brk:%d", info
->icount
.brk
);
2641 if (info
->icount
.overrun
)
2642 seq_printf(m
, " oe:%d", info
->icount
.overrun
);
2645 /* Append serial signal status to end */
2646 seq_printf(m
, " %s\n", stat_buf
+1);
2648 seq_printf(m
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2649 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2653 /* Called to print information about devices
2655 static int mgslpc_proc_show(struct seq_file
*m
, void *v
)
2659 seq_printf(m
, "synclink driver:%s\n", driver_version
);
2661 info
= mgslpc_device_list
;
2664 info
= info
->next_device
;
2669 static int mgslpc_proc_open(struct inode
*inode
, struct file
*file
)
2671 return single_open(file
, mgslpc_proc_show
, NULL
);
2674 static const struct file_operations mgslpc_proc_fops
= {
2675 .owner
= THIS_MODULE
,
2676 .open
= mgslpc_proc_open
,
2678 .llseek
= seq_lseek
,
2679 .release
= single_release
,
2682 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2684 /* each buffer has header and data */
2685 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2687 /* calculate total allocation size for 8 buffers */
2688 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2690 /* limit total allocated memory */
2691 if (info
->rx_buf_total_size
> 0x10000)
2692 info
->rx_buf_total_size
= 0x10000;
2694 /* calculate number of buffers */
2695 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2697 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2698 if (info
->rx_buf
== NULL
)
2701 rx_reset_buffers(info
);
2705 static void rx_free_buffers(MGSLPC_INFO
*info
)
2707 kfree(info
->rx_buf
);
2708 info
->rx_buf
= NULL
;
2711 static int claim_resources(MGSLPC_INFO
*info
)
2713 if (rx_alloc_buffers(info
) < 0 ) {
2714 printk( "Cant allocate rx buffer %s\n", info
->device_name
);
2715 release_resources(info
);
2721 static void release_resources(MGSLPC_INFO
*info
)
2723 if (debug_level
>= DEBUG_LEVEL_INFO
)
2724 printk("release_resources(%s)\n", info
->device_name
);
2725 rx_free_buffers(info
);
2728 /* Add the specified device instance data structure to the
2729 * global linked list of devices and increment the device count.
2731 * Arguments: info pointer to device instance data
2733 static void mgslpc_add_device(MGSLPC_INFO
*info
)
2735 info
->next_device
= NULL
;
2736 info
->line
= mgslpc_device_count
;
2737 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2739 if (info
->line
< MAX_DEVICE_COUNT
) {
2740 if (maxframe
[info
->line
])
2741 info
->max_frame_size
= maxframe
[info
->line
];
2744 mgslpc_device_count
++;
2746 if (!mgslpc_device_list
)
2747 mgslpc_device_list
= info
;
2749 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
2750 while( current_dev
->next_device
)
2751 current_dev
= current_dev
->next_device
;
2752 current_dev
->next_device
= info
;
2755 if (info
->max_frame_size
< 4096)
2756 info
->max_frame_size
= 4096;
2757 else if (info
->max_frame_size
> 65535)
2758 info
->max_frame_size
= 65535;
2760 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2761 info
->device_name
, info
->io_base
, info
->irq_level
);
2763 #if SYNCLINK_GENERIC_HDLC
2768 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2770 MGSLPC_INFO
*info
= mgslpc_device_list
;
2771 MGSLPC_INFO
*last
= NULL
;
2774 if (info
== remove_info
) {
2776 last
->next_device
= info
->next_device
;
2778 mgslpc_device_list
= info
->next_device
;
2779 #if SYNCLINK_GENERIC_HDLC
2782 release_resources(info
);
2784 mgslpc_device_count
--;
2788 info
= info
->next_device
;
2792 static struct pcmcia_device_id mgslpc_ids
[] = {
2793 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2796 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2798 static struct pcmcia_driver mgslpc_driver
= {
2799 .owner
= THIS_MODULE
,
2801 .name
= "synclink_cs",
2803 .probe
= mgslpc_probe
,
2804 .remove
= mgslpc_detach
,
2805 .id_table
= mgslpc_ids
,
2806 .suspend
= mgslpc_suspend
,
2807 .resume
= mgslpc_resume
,
2810 static const struct tty_operations mgslpc_ops
= {
2811 .open
= mgslpc_open
,
2812 .close
= mgslpc_close
,
2813 .write
= mgslpc_write
,
2814 .put_char
= mgslpc_put_char
,
2815 .flush_chars
= mgslpc_flush_chars
,
2816 .write_room
= mgslpc_write_room
,
2817 .chars_in_buffer
= mgslpc_chars_in_buffer
,
2818 .flush_buffer
= mgslpc_flush_buffer
,
2819 .ioctl
= mgslpc_ioctl
,
2820 .throttle
= mgslpc_throttle
,
2821 .unthrottle
= mgslpc_unthrottle
,
2822 .send_xchar
= mgslpc_send_xchar
,
2823 .break_ctl
= mgslpc_break
,
2824 .wait_until_sent
= mgslpc_wait_until_sent
,
2825 .set_termios
= mgslpc_set_termios
,
2827 .start
= tx_release
,
2828 .hangup
= mgslpc_hangup
,
2829 .tiocmget
= tiocmget
,
2830 .tiocmset
= tiocmset
,
2831 .proc_fops
= &mgslpc_proc_fops
,
2834 static void synclink_cs_cleanup(void)
2838 printk("Unloading %s: version %s\n", driver_name
, driver_version
);
2840 while(mgslpc_device_list
)
2841 mgslpc_remove_device(mgslpc_device_list
);
2843 if (serial_driver
) {
2844 if ((rc
= tty_unregister_driver(serial_driver
)))
2845 printk("%s(%d) failed to unregister tty driver err=%d\n",
2846 __FILE__
,__LINE__
,rc
);
2847 put_tty_driver(serial_driver
);
2850 pcmcia_unregister_driver(&mgslpc_driver
);
2853 static int __init
synclink_cs_init(void)
2857 if (break_on_load
) {
2858 mgslpc_get_text_ptr();
2862 printk("%s %s\n", driver_name
, driver_version
);
2864 if ((rc
= pcmcia_register_driver(&mgslpc_driver
)) < 0)
2867 serial_driver
= alloc_tty_driver(MAX_DEVICE_COUNT
);
2868 if (!serial_driver
) {
2873 /* Initialize the tty_driver structure */
2875 serial_driver
->owner
= THIS_MODULE
;
2876 serial_driver
->driver_name
= "synclink_cs";
2877 serial_driver
->name
= "ttySLP";
2878 serial_driver
->major
= ttymajor
;
2879 serial_driver
->minor_start
= 64;
2880 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2881 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
2882 serial_driver
->init_termios
= tty_std_termios
;
2883 serial_driver
->init_termios
.c_cflag
=
2884 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
2885 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
2886 tty_set_operations(serial_driver
, &mgslpc_ops
);
2888 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
2889 printk("%s(%d):Couldn't register serial driver\n",
2891 put_tty_driver(serial_driver
);
2892 serial_driver
= NULL
;
2896 printk("%s %s, tty major#%d\n",
2897 driver_name
, driver_version
,
2898 serial_driver
->major
);
2903 synclink_cs_cleanup();
2907 static void __exit
synclink_cs_exit(void)
2909 synclink_cs_cleanup();
2912 module_init(synclink_cs_init
);
2913 module_exit(synclink_cs_exit
);
2915 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
2920 /* note:standard BRG mode is broken in V3.2 chip
2921 * so enhanced mode is always used
2929 for (M
= 1; N
> 64 && M
< 16; M
++)
2935 * BGR[7..0] contained in BGR register
2936 * BGR[9..8] contained in CCR2[7..6]
2937 * divisor = (N+1)*2^M
2939 * Note: M *must* not be zero (causes asymetric duty cycle)
2941 write_reg(info
, (unsigned char) (channel
+ BGR
),
2942 (unsigned char) ((M
<< 6) + N
));
2943 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
2944 val
|= ((M
<< 4) & 0xc0);
2945 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
2949 /* Enabled the AUX clock output at the specified frequency.
2951 static void enable_auxclk(MGSLPC_INFO
*info
)
2957 * 07..06 MDS[1..0] 10 = transparent HDLC mode
2958 * 05 ADM Address Mode, 0 = no addr recognition
2959 * 04 TMD Timer Mode, 0 = external
2960 * 03 RAC Receiver Active, 0 = inactive
2961 * 02 RTS 0=RTS active during xmit, 1=RTS always active
2962 * 01 TRS Timer Resolution, 1=512
2963 * 00 TLP Test Loop, 0 = no loop
2969 /* channel B RTS is used to enable AUXCLK driver on SP505 */
2970 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
2972 write_reg(info
, CHB
+ MODE
, val
);
2976 * 07 PU Power Up, 1=active, 0=power down
2977 * 06 MCE Master Clock Enable, 1=enabled
2979 * 04..02 SC[2..0] Encoding
2980 * 01..00 SM[1..0] Serial Mode, 00=HDLC
2984 write_reg(info
, CHB
+ CCR0
, 0xc0);
2988 * 07 SFLG Shared Flag, 0 = disable shared flags
2989 * 06 GALP Go Active On Loop, 0 = not used
2990 * 05 GLP Go On Loop, 0 = not used
2991 * 04 ODS Output Driver Select, 1=TxD is push-pull output
2992 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
2993 * 02..00 CM[2..0] Clock Mode
2997 write_reg(info
, CHB
+ CCR1
, 0x17);
3001 * 07..06 BGR[9..8] Baud rate bits 9..8
3002 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3003 * 04 SSEL Clock source select, 1=submode b
3004 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3005 * 02 RWX Read/Write Exchange 0=disabled
3006 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3007 * 00 DIV, data inversion 0=disabled, 1=enabled
3011 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3012 write_reg(info
, CHB
+ CCR2
, 0x38);
3014 write_reg(info
, CHB
+ CCR2
, 0x30);
3018 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3019 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3020 * 05 TST1 Test Pin, 0=normal operation
3021 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3022 * 03..02 Reserved, must be 0
3023 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3027 write_reg(info
, CHB
+ CCR4
, 0x50);
3029 /* if auxclk not enabled, set internal BRG so
3030 * CTS transitions can be detected (requires TxC)
3032 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3033 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
3035 mgslpc_set_rate(info
, CHB
, 921600);
3038 static void loopback_enable(MGSLPC_INFO
*info
)
3042 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3043 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
3044 write_reg(info
, CHA
+ CCR1
, val
);
3046 /* CCR2:04 SSEL Clock source select, 1=submode b */
3047 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3048 write_reg(info
, CHA
+ CCR2
, val
);
3050 /* set LinkSpeed if available, otherwise default to 2Mbps */
3051 if (info
->params
.clock_speed
)
3052 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3054 mgslpc_set_rate(info
, CHA
, 1843200);
3056 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3057 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3058 write_reg(info
, CHA
+ MODE
, val
);
3061 static void hdlc_mode(MGSLPC_INFO
*info
)
3064 unsigned char clkmode
, clksubmode
;
3066 /* disable all interrupts */
3067 irq_disable(info
, CHA
, 0xffff);
3068 irq_disable(info
, CHB
, 0xffff);
3069 port_irq_disable(info
, 0xff);
3071 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3072 clkmode
= clksubmode
= 0;
3073 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3074 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3075 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3077 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3078 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3079 /* clock mode 7b, rcv = BRG, xmt = BRG */
3082 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3083 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3084 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3088 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3091 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3092 /* clock mode 0b, rcv = RxC, xmt = BRG */
3098 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3099 * 05 ADM Address Mode, 0 = no addr recognition
3100 * 04 TMD Timer Mode, 0 = external
3101 * 03 RAC Receiver Active, 0 = inactive
3102 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3103 * 01 TRS Timer Resolution, 1=512
3104 * 00 TLP Test Loop, 0 = no loop
3109 if (info
->params
.loopback
)
3112 /* preserve RTS state */
3113 if (info
->serial_signals
& SerialSignal_RTS
)
3115 write_reg(info
, CHA
+ MODE
, val
);
3119 * 07 PU Power Up, 1=active, 0=power down
3120 * 06 MCE Master Clock Enable, 1=enabled
3122 * 04..02 SC[2..0] Encoding
3123 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3128 switch (info
->params
.encoding
)
3130 case HDLC_ENCODING_NRZI
:
3133 case HDLC_ENCODING_BIPHASE_SPACE
:
3136 case HDLC_ENCODING_BIPHASE_MARK
:
3139 case HDLC_ENCODING_BIPHASE_LEVEL
:
3141 break; // Manchester
3143 write_reg(info
, CHA
+ CCR0
, val
);
3147 * 07 SFLG Shared Flag, 0 = disable shared flags
3148 * 06 GALP Go Active On Loop, 0 = not used
3149 * 05 GLP Go On Loop, 0 = not used
3150 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3151 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3152 * 02..00 CM[2..0] Clock Mode
3156 val
= 0x10 + clkmode
;
3157 write_reg(info
, CHA
+ CCR1
, val
);
3161 * 07..06 BGR[9..8] Baud rate bits 9..8
3162 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3163 * 04 SSEL Clock source select, 1=submode b
3164 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3165 * 02 RWX Read/Write Exchange 0=disabled
3166 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3167 * 00 DIV, data inversion 0=disabled, 1=enabled
3172 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3173 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3177 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3179 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3181 write_reg(info
, CHA
+ CCR2
, val
);
3185 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3186 * 05 EPT Enable preamble transmission, 1=enabled
3187 * 04 RADD Receive address pushed to FIFO, 0=disabled
3188 * 03 CRL CRC Reset Level, 0=FFFF
3189 * 02 RCRC Rx CRC 0=On 1=Off
3190 * 01 TCRC Tx CRC 0=On 1=Off
3191 * 00 PSD DPLL Phase Shift Disable
3196 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3198 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3200 switch (info
->params
.preamble_length
)
3202 case HDLC_PREAMBLE_LENGTH_16BITS
:
3205 case HDLC_PREAMBLE_LENGTH_32BITS
:
3208 case HDLC_PREAMBLE_LENGTH_64BITS
:
3212 write_reg(info
, CHA
+ CCR3
, val
);
3214 /* PRE - Preamble pattern */
3216 switch (info
->params
.preamble
)
3218 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3219 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3220 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3221 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3223 write_reg(info
, CHA
+ PRE
, val
);
3227 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3228 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3229 * 05 TST1 Test Pin, 0=normal operation
3230 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3231 * 03..02 Reserved, must be 0
3232 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3237 write_reg(info
, CHA
+ CCR4
, val
);
3238 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3239 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3241 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3243 /* RLCR Receive length check register
3245 * 7 1=enable receive length check
3246 * 6..0 Max frame length = (RL + 1) * 32
3248 write_reg(info
, CHA
+ RLCR
, 0);
3250 /* XBCH Transmit Byte Count High
3252 * 07 DMA mode, 0 = interrupt driven
3253 * 06 NRM, 0=ABM (ignored)
3254 * 05 CAS Carrier Auto Start
3255 * 04 XC Transmit Continuously (ignored)
3256 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3261 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3263 write_reg(info
, CHA
+ XBCH
, val
);
3264 enable_auxclk(info
);
3265 if (info
->params
.loopback
|| info
->testing_irq
)
3266 loopback_enable(info
);
3267 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3269 irq_enable(info
, CHB
, IRQ_CTS
);
3270 /* PVR[3] 1=AUTO CTS active */
3271 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3273 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3275 irq_enable(info
, CHA
,
3276 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3277 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3278 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3279 wait_command_complete(info
, CHA
);
3280 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3282 /* Master clock mode enabled above to allow reset commands
3283 * to complete even if no data clocks are present.
3285 * Disable master clock mode for normal communications because
3286 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3287 * IRQ when in master clock mode.
3289 * Leave master clock mode enabled for IRQ test because the
3290 * timer IRQ used by the test can only happen in master clock mode.
3292 if (!info
->testing_irq
)
3293 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3301 static void rx_stop(MGSLPC_INFO
*info
)
3303 if (debug_level
>= DEBUG_LEVEL_ISR
)
3304 printk("%s(%d):rx_stop(%s)\n",
3305 __FILE__
,__LINE__
, info
->device_name
);
3307 /* MODE:03 RAC Receiver Active, 0=inactive */
3308 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3310 info
->rx_enabled
= false;
3311 info
->rx_overflow
= false;
3314 static void rx_start(MGSLPC_INFO
*info
)
3316 if (debug_level
>= DEBUG_LEVEL_ISR
)
3317 printk("%s(%d):rx_start(%s)\n",
3318 __FILE__
,__LINE__
, info
->device_name
);
3320 rx_reset_buffers(info
);
3321 info
->rx_enabled
= false;
3322 info
->rx_overflow
= false;
3324 /* MODE:03 RAC Receiver Active, 1=active */
3325 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3327 info
->rx_enabled
= true;
3330 static void tx_start(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
3332 if (debug_level
>= DEBUG_LEVEL_ISR
)
3333 printk("%s(%d):tx_start(%s)\n",
3334 __FILE__
,__LINE__
, info
->device_name
);
3336 if (info
->tx_count
) {
3337 /* If auto RTS enabled and RTS is inactive, then assert */
3338 /* RTS and set a flag indicating that the driver should */
3339 /* negate RTS when the transmission completes. */
3340 info
->drop_rts_on_tx_done
= false;
3342 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3344 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3345 info
->serial_signals
|= SerialSignal_RTS
;
3347 info
->drop_rts_on_tx_done
= true;
3351 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3352 if (!info
->tx_active
) {
3353 info
->tx_active
= true;
3354 tx_ready(info
, tty
);
3357 info
->tx_active
= true;
3358 tx_ready(info
, tty
);
3359 mod_timer(&info
->tx_timer
, jiffies
+
3360 msecs_to_jiffies(5000));
3364 if (!info
->tx_enabled
)
3365 info
->tx_enabled
= true;
3368 static void tx_stop(MGSLPC_INFO
*info
)
3370 if (debug_level
>= DEBUG_LEVEL_ISR
)
3371 printk("%s(%d):tx_stop(%s)\n",
3372 __FILE__
,__LINE__
, info
->device_name
);
3374 del_timer(&info
->tx_timer
);
3376 info
->tx_enabled
= false;
3377 info
->tx_active
= false;
3380 /* Reset the adapter to a known state and prepare it for further use.
3382 static void reset_device(MGSLPC_INFO
*info
)
3384 /* power up both channels (set BIT7) */
3385 write_reg(info
, CHA
+ CCR0
, 0x80);
3386 write_reg(info
, CHB
+ CCR0
, 0x80);
3387 write_reg(info
, CHA
+ MODE
, 0);
3388 write_reg(info
, CHB
+ MODE
, 0);
3390 /* disable all interrupts */
3391 irq_disable(info
, CHA
, 0xffff);
3392 irq_disable(info
, CHB
, 0xffff);
3393 port_irq_disable(info
, 0xff);
3395 /* PCR Port Configuration Register
3397 * 07..04 DEC[3..0] Serial I/F select outputs
3398 * 03 output, 1=AUTO CTS control enabled
3399 * 02 RI Ring Indicator input 0=active
3400 * 01 DSR input 0=active
3401 * 00 DTR output 0=active
3405 write_reg(info
, PCR
, 0x06);
3407 /* PVR Port Value Register
3409 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3410 * 03 AUTO CTS output 1=enabled
3411 * 02 RI Ring Indicator input
3413 * 00 DTR output (1=inactive)
3417 // write_reg(info, PVR, PVR_DTR);
3419 /* IPC Interrupt Port Configuration
3421 * 07 VIS 1=Masked interrupts visible
3422 * 06..05 Reserved, 0
3423 * 04..03 SLA Slave address, 00 ignored
3424 * 02 CASM Cascading Mode, 1=daisy chain
3425 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3429 write_reg(info
, IPC
, 0x05);
3432 static void async_mode(MGSLPC_INFO
*info
)
3436 /* disable all interrupts */
3437 irq_disable(info
, CHA
, 0xffff);
3438 irq_disable(info
, CHB
, 0xffff);
3439 port_irq_disable(info
, 0xff);
3444 * 06 FRTS RTS State, 0=active
3445 * 05 FCTS Flow Control on CTS
3446 * 04 FLON Flow Control Enable
3447 * 03 RAC Receiver Active, 0 = inactive
3448 * 02 RTS 0=Auto RTS, 1=manual RTS
3449 * 01 TRS Timer Resolution, 1=512
3450 * 00 TLP Test Loop, 0 = no loop
3455 if (info
->params
.loopback
)
3458 /* preserve RTS state */
3459 if (!(info
->serial_signals
& SerialSignal_RTS
))
3461 write_reg(info
, CHA
+ MODE
, val
);
3465 * 07 PU Power Up, 1=active, 0=power down
3466 * 06 MCE Master Clock Enable, 1=enabled
3468 * 04..02 SC[2..0] Encoding, 000=NRZ
3469 * 01..00 SM[1..0] Serial Mode, 11=Async
3473 write_reg(info
, CHA
+ CCR0
, 0x83);
3477 * 07..05 Reserved, 0
3478 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3479 * 03 BCR Bit Clock Rate, 1=16x
3480 * 02..00 CM[2..0] Clock Mode, 111=BRG
3484 write_reg(info
, CHA
+ CCR1
, 0x1f);
3488 * 07..06 BGR[9..8] Baud rate bits 9..8
3489 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3490 * 04 SSEL Clock source select, 1=submode b
3491 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3492 * 02 RWX Read/Write Exchange 0=disabled
3494 * 00 DIV, data inversion 0=disabled, 1=enabled
3498 write_reg(info
, CHA
+ CCR2
, 0x10);
3502 * 07..01 Reserved, 0
3503 * 00 PSD DPLL Phase Shift Disable
3507 write_reg(info
, CHA
+ CCR3
, 0);
3511 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3512 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3513 * 05 TST1 Test Pin, 0=normal operation
3514 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3515 * 03..00 Reserved, must be 0
3519 write_reg(info
, CHA
+ CCR4
, 0x50);
3520 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3525 * 06 XBRK transmit break, 0=normal operation
3526 * 05 Stop bits (0=1, 1=2)
3527 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3528 * 02 PAREN Parity Enable
3529 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3533 if (info
->params
.data_bits
!= 8)
3534 val
|= BIT0
; /* 7 bits */
3535 if (info
->params
.stop_bits
!= 1)
3537 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3539 val
|= BIT2
; /* Parity enable */
3540 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3545 write_reg(info
, CHA
+ DAFO
, val
);
3547 /* RFC Rx FIFO Control
3550 * 06 DPS, 1=parity bit not stored in data byte
3551 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3552 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3553 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3555 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3559 write_reg(info
, CHA
+ RFC
, 0x5c);
3561 /* RLCR Receive length check register
3563 * Max frame length = (RL + 1) * 32
3565 write_reg(info
, CHA
+ RLCR
, 0);
3567 /* XBCH Transmit Byte Count High
3569 * 07 DMA mode, 0 = interrupt driven
3570 * 06 NRM, 0=ABM (ignored)
3571 * 05 CAS Carrier Auto Start
3572 * 04 XC Transmit Continuously (ignored)
3573 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3578 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3580 write_reg(info
, CHA
+ XBCH
, val
);
3581 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3582 irq_enable(info
, CHA
, IRQ_CTS
);
3584 /* MODE:03 RAC Receiver Active, 1=active */
3585 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3586 enable_auxclk(info
);
3587 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3588 irq_enable(info
, CHB
, IRQ_CTS
);
3589 /* PVR[3] 1=AUTO CTS active */
3590 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3592 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3593 irq_enable(info
, CHA
,
3594 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3595 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3596 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3597 wait_command_complete(info
, CHA
);
3598 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3601 /* Set the HDLC idle mode for the transmitter.
3603 static void tx_set_idle(MGSLPC_INFO
*info
)
3605 /* Note: ESCC2 only supports flags and one idle modes */
3606 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3607 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3609 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3612 /* get state of the V24 status (input) signals.
3614 static void get_signals(MGSLPC_INFO
*info
)
3616 unsigned char status
= 0;
3618 /* preserve DTR and RTS */
3619 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3621 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3622 info
->serial_signals
|= SerialSignal_DCD
;
3623 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3624 info
->serial_signals
|= SerialSignal_CTS
;
3626 status
= read_reg(info
, CHA
+ PVR
);
3627 if (!(status
& PVR_RI
))
3628 info
->serial_signals
|= SerialSignal_RI
;
3629 if (!(status
& PVR_DSR
))
3630 info
->serial_signals
|= SerialSignal_DSR
;
3633 /* Set the state of DTR and RTS based on contents of
3634 * serial_signals member of device extension.
3636 static void set_signals(MGSLPC_INFO
*info
)
3640 val
= read_reg(info
, CHA
+ MODE
);
3641 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3642 if (info
->serial_signals
& SerialSignal_RTS
)
3647 if (info
->serial_signals
& SerialSignal_RTS
)
3652 write_reg(info
, CHA
+ MODE
, val
);
3654 if (info
->serial_signals
& SerialSignal_DTR
)
3655 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3657 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3660 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3667 info
->rx_frame_count
= 0;
3668 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3669 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3670 buf
->status
= buf
->count
= 0;
3674 /* Attempt to return a received HDLC frame
3675 * Only frames received without errors are returned.
3677 * Returns true if frame returned, otherwise false
3679 static bool rx_get_frame(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
3681 unsigned short status
;
3683 unsigned int framesize
= 0;
3684 unsigned long flags
;
3685 bool return_frame
= false;
3687 if (info
->rx_frame_count
== 0)
3690 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3692 status
= buf
->status
;
3694 /* 07 VFR 1=valid frame
3695 * 06 RDO 1=data overrun
3696 * 05 CRC 1=OK, 0=error
3697 * 04 RAB 1=frame aborted
3699 if ((status
& 0xf0) != 0xA0) {
3700 if (!(status
& BIT7
) || (status
& BIT4
))
3701 info
->icount
.rxabort
++;
3702 else if (status
& BIT6
)
3703 info
->icount
.rxover
++;
3704 else if (!(status
& BIT5
)) {
3705 info
->icount
.rxcrc
++;
3706 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3707 return_frame
= true;
3710 #if SYNCLINK_GENERIC_HDLC
3712 info
->netdev
->stats
.rx_errors
++;
3713 info
->netdev
->stats
.rx_frame_errors
++;
3717 return_frame
= true;
3720 framesize
= buf
->count
;
3722 if (debug_level
>= DEBUG_LEVEL_BH
)
3723 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3724 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
3726 if (debug_level
>= DEBUG_LEVEL_DATA
)
3727 trace_block(info
, buf
->data
, framesize
, 0);
3730 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3731 framesize
+1 > info
->max_frame_size
) ||
3732 framesize
> info
->max_frame_size
)
3733 info
->icount
.rxlong
++;
3736 info
->icount
.rxok
++;
3738 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3739 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3743 #if SYNCLINK_GENERIC_HDLC
3745 hdlcdev_rx(info
, buf
->data
, framesize
);
3748 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3752 spin_lock_irqsave(&info
->lock
,flags
);
3753 buf
->status
= buf
->count
= 0;
3754 info
->rx_frame_count
--;
3756 if (info
->rx_get
>= info
->rx_buf_count
)
3758 spin_unlock_irqrestore(&info
->lock
,flags
);
3763 static bool register_test(MGSLPC_INFO
*info
)
3765 static unsigned char patterns
[] =
3766 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3767 static unsigned int count
= ARRAY_SIZE(patterns
);
3770 unsigned long flags
;
3772 spin_lock_irqsave(&info
->lock
,flags
);
3775 for (i
= 0; i
< count
; i
++) {
3776 write_reg(info
, XAD1
, patterns
[i
]);
3777 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3778 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3779 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3785 spin_unlock_irqrestore(&info
->lock
,flags
);
3789 static bool irq_test(MGSLPC_INFO
*info
)
3791 unsigned long end_time
;
3792 unsigned long flags
;
3794 spin_lock_irqsave(&info
->lock
,flags
);
3797 info
->testing_irq
= true;
3800 info
->irq_occurred
= false;
3802 /* init hdlc mode */
3804 irq_enable(info
, CHA
, IRQ_TIMER
);
3805 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
3806 issue_command(info
, CHA
, CMD_START_TIMER
);
3808 spin_unlock_irqrestore(&info
->lock
,flags
);
3811 while(end_time
-- && !info
->irq_occurred
) {
3812 msleep_interruptible(10);
3815 info
->testing_irq
= false;
3817 spin_lock_irqsave(&info
->lock
,flags
);
3819 spin_unlock_irqrestore(&info
->lock
,flags
);
3821 return info
->irq_occurred
;
3824 static int adapter_test(MGSLPC_INFO
*info
)
3826 if (!register_test(info
)) {
3827 info
->init_error
= DiagStatus_AddressFailure
;
3828 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
3829 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
3833 if (!irq_test(info
)) {
3834 info
->init_error
= DiagStatus_IrqFailure
;
3835 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
3836 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
3840 if (debug_level
>= DEBUG_LEVEL_INFO
)
3841 printk("%s(%d):device %s passed diagnostics\n",
3842 __FILE__
,__LINE__
,info
->device_name
);
3846 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
3851 printk("%s tx data:\n",info
->device_name
);
3853 printk("%s rx data:\n",info
->device_name
);
3861 for(i
=0;i
<linecount
;i
++)
3862 printk("%02X ",(unsigned char)data
[i
]);
3865 for(i
=0;i
<linecount
;i
++) {
3866 if (data
[i
]>=040 && data
[i
]<=0176)
3867 printk("%c",data
[i
]);
3878 /* HDLC frame time out
3879 * update stats and do tx completion processing
3881 static void tx_timeout(unsigned long context
)
3883 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
3884 unsigned long flags
;
3886 if ( debug_level
>= DEBUG_LEVEL_INFO
)
3887 printk( "%s(%d):tx_timeout(%s)\n",
3888 __FILE__
,__LINE__
,info
->device_name
);
3889 if(info
->tx_active
&&
3890 info
->params
.mode
== MGSL_MODE_HDLC
) {
3891 info
->icount
.txtimeout
++;
3893 spin_lock_irqsave(&info
->lock
,flags
);
3894 info
->tx_active
= false;
3895 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
3897 spin_unlock_irqrestore(&info
->lock
,flags
);
3899 #if SYNCLINK_GENERIC_HDLC
3901 hdlcdev_tx_done(info
);
3905 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
3906 bh_transmit(info
, tty
);
3911 #if SYNCLINK_GENERIC_HDLC
3914 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
3915 * set encoding and frame check sequence (FCS) options
3917 * dev pointer to network device structure
3918 * encoding serial encoding setting
3919 * parity FCS setting
3921 * returns 0 if success, otherwise error code
3923 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
3924 unsigned short parity
)
3926 MGSLPC_INFO
*info
= dev_to_port(dev
);
3927 struct tty_struct
*tty
;
3928 unsigned char new_encoding
;
3929 unsigned short new_crctype
;
3931 /* return error if TTY interface open */
3932 if (info
->port
.count
)
3937 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
3938 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
3939 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
3940 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
3941 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
3942 default: return -EINVAL
;
3947 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
3948 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
3949 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
3950 default: return -EINVAL
;
3953 info
->params
.encoding
= new_encoding
;
3954 info
->params
.crc_type
= new_crctype
;
3956 /* if network interface up, reprogram hardware */
3957 if (info
->netcount
) {
3958 tty
= tty_port_tty_get(&info
->port
);
3959 mgslpc_program_hw(info
, tty
);
3967 * called by generic HDLC layer to send frame
3969 * skb socket buffer containing HDLC frame
3970 * dev pointer to network device structure
3972 static netdev_tx_t
hdlcdev_xmit(struct sk_buff
*skb
,
3973 struct net_device
*dev
)
3975 MGSLPC_INFO
*info
= dev_to_port(dev
);
3976 unsigned long flags
;
3978 if (debug_level
>= DEBUG_LEVEL_INFO
)
3979 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
3981 /* stop sending until this frame completes */
3982 netif_stop_queue(dev
);
3984 /* copy data to device buffers */
3985 skb_copy_from_linear_data(skb
, info
->tx_buf
, skb
->len
);
3987 info
->tx_put
= info
->tx_count
= skb
->len
;
3989 /* update network statistics */
3990 dev
->stats
.tx_packets
++;
3991 dev
->stats
.tx_bytes
+= skb
->len
;
3993 /* done with socket buffer, so free it */
3996 /* save start time for transmit timeout detection */
3997 dev
->trans_start
= jiffies
;
3999 /* start hardware transmitter if necessary */
4000 spin_lock_irqsave(&info
->lock
,flags
);
4001 if (!info
->tx_active
) {
4002 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4003 tx_start(info
, tty
);
4006 spin_unlock_irqrestore(&info
->lock
,flags
);
4008 return NETDEV_TX_OK
;
4012 * called by network layer when interface enabled
4013 * claim resources and initialize hardware
4015 * dev pointer to network device structure
4017 * returns 0 if success, otherwise error code
4019 static int hdlcdev_open(struct net_device
*dev
)
4021 MGSLPC_INFO
*info
= dev_to_port(dev
);
4022 struct tty_struct
*tty
;
4024 unsigned long flags
;
4026 if (debug_level
>= DEBUG_LEVEL_INFO
)
4027 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
4029 /* generic HDLC layer open processing */
4030 if ((rc
= hdlc_open(dev
)))
4033 /* arbitrate between network and tty opens */
4034 spin_lock_irqsave(&info
->netlock
, flags
);
4035 if (info
->port
.count
!= 0 || info
->netcount
!= 0) {
4036 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
4037 spin_unlock_irqrestore(&info
->netlock
, flags
);
4041 spin_unlock_irqrestore(&info
->netlock
, flags
);
4043 tty
= tty_port_tty_get(&info
->port
);
4044 /* claim resources and init adapter */
4045 if ((rc
= startup(info
, tty
)) != 0) {
4047 spin_lock_irqsave(&info
->netlock
, flags
);
4049 spin_unlock_irqrestore(&info
->netlock
, flags
);
4052 /* assert DTR and RTS, apply hardware settings */
4053 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4054 mgslpc_program_hw(info
, tty
);
4057 /* enable network layer transmit */
4058 dev
->trans_start
= jiffies
;
4059 netif_start_queue(dev
);
4061 /* inform generic HDLC layer of current DCD status */
4062 spin_lock_irqsave(&info
->lock
, flags
);
4064 spin_unlock_irqrestore(&info
->lock
, flags
);
4065 if (info
->serial_signals
& SerialSignal_DCD
)
4066 netif_carrier_on(dev
);
4068 netif_carrier_off(dev
);
4073 * called by network layer when interface is disabled
4074 * shutdown hardware and release resources
4076 * dev pointer to network device structure
4078 * returns 0 if success, otherwise error code
4080 static int hdlcdev_close(struct net_device
*dev
)
4082 MGSLPC_INFO
*info
= dev_to_port(dev
);
4083 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4084 unsigned long flags
;
4086 if (debug_level
>= DEBUG_LEVEL_INFO
)
4087 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4089 netif_stop_queue(dev
);
4091 /* shutdown adapter and release resources */
4092 shutdown(info
, tty
);
4096 spin_lock_irqsave(&info
->netlock
, flags
);
4098 spin_unlock_irqrestore(&info
->netlock
, flags
);
4104 * called by network layer to process IOCTL call to network device
4106 * dev pointer to network device structure
4107 * ifr pointer to network interface request structure
4108 * cmd IOCTL command code
4110 * returns 0 if success, otherwise error code
4112 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4114 const size_t size
= sizeof(sync_serial_settings
);
4115 sync_serial_settings new_line
;
4116 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4117 MGSLPC_INFO
*info
= dev_to_port(dev
);
4120 if (debug_level
>= DEBUG_LEVEL_INFO
)
4121 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4123 /* return error if TTY interface open */
4124 if (info
->port
.count
)
4127 if (cmd
!= SIOCWANDEV
)
4128 return hdlc_ioctl(dev
, ifr
, cmd
);
4130 switch(ifr
->ifr_settings
.type
) {
4131 case IF_GET_IFACE
: /* return current sync_serial_settings */
4133 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4134 if (ifr
->ifr_settings
.size
< size
) {
4135 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4139 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4140 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4141 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4142 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4145 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4146 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4147 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4148 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4149 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4152 new_line
.clock_rate
= info
->params
.clock_speed
;
4153 new_line
.loopback
= info
->params
.loopback
? 1:0;
4155 if (copy_to_user(line
, &new_line
, size
))
4159 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4161 if(!capable(CAP_NET_ADMIN
))
4163 if (copy_from_user(&new_line
, line
, size
))
4166 switch (new_line
.clock_type
)
4168 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4169 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4170 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4171 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4172 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4173 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4174 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4175 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4176 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4177 default: return -EINVAL
;
4180 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4183 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4184 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4185 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4186 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4187 info
->params
.flags
|= flags
;
4189 info
->params
.loopback
= new_line
.loopback
;
4191 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4192 info
->params
.clock_speed
= new_line
.clock_rate
;
4194 info
->params
.clock_speed
= 0;
4196 /* if network interface up, reprogram hardware */
4197 if (info
->netcount
) {
4198 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4199 mgslpc_program_hw(info
, tty
);
4205 return hdlc_ioctl(dev
, ifr
, cmd
);
4210 * called by network layer when transmit timeout is detected
4212 * dev pointer to network device structure
4214 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4216 MGSLPC_INFO
*info
= dev_to_port(dev
);
4217 unsigned long flags
;
4219 if (debug_level
>= DEBUG_LEVEL_INFO
)
4220 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4222 dev
->stats
.tx_errors
++;
4223 dev
->stats
.tx_aborted_errors
++;
4225 spin_lock_irqsave(&info
->lock
,flags
);
4227 spin_unlock_irqrestore(&info
->lock
,flags
);
4229 netif_wake_queue(dev
);
4233 * called by device driver when transmit completes
4234 * reenable network layer transmit if stopped
4236 * info pointer to device instance information
4238 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4240 if (netif_queue_stopped(info
->netdev
))
4241 netif_wake_queue(info
->netdev
);
4245 * called by device driver when frame received
4246 * pass frame to network layer
4248 * info pointer to device instance information
4249 * buf pointer to buffer contianing frame data
4250 * size count of data bytes in buf
4252 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4254 struct sk_buff
*skb
= dev_alloc_skb(size
);
4255 struct net_device
*dev
= info
->netdev
;
4257 if (debug_level
>= DEBUG_LEVEL_INFO
)
4258 printk("hdlcdev_rx(%s)\n",dev
->name
);
4261 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4262 dev
->stats
.rx_dropped
++;
4266 memcpy(skb_put(skb
, size
), buf
, size
);
4268 skb
->protocol
= hdlc_type_trans(skb
, dev
);
4270 dev
->stats
.rx_packets
++;
4271 dev
->stats
.rx_bytes
+= size
;
4276 static const struct net_device_ops hdlcdev_ops
= {
4277 .ndo_open
= hdlcdev_open
,
4278 .ndo_stop
= hdlcdev_close
,
4279 .ndo_change_mtu
= hdlc_change_mtu
,
4280 .ndo_start_xmit
= hdlc_start_xmit
,
4281 .ndo_do_ioctl
= hdlcdev_ioctl
,
4282 .ndo_tx_timeout
= hdlcdev_tx_timeout
,
4286 * called by device driver when adding device instance
4287 * do generic HDLC initialization
4289 * info pointer to device instance information
4291 * returns 0 if success, otherwise error code
4293 static int hdlcdev_init(MGSLPC_INFO
*info
)
4296 struct net_device
*dev
;
4299 /* allocate and initialize network and HDLC layer objects */
4301 if (!(dev
= alloc_hdlcdev(info
))) {
4302 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4306 /* for network layer reporting purposes only */
4307 dev
->base_addr
= info
->io_base
;
4308 dev
->irq
= info
->irq_level
;
4310 /* network layer callbacks and settings */
4311 dev
->netdev_ops
= &hdlcdev_ops
;
4312 dev
->watchdog_timeo
= 10 * HZ
;
4313 dev
->tx_queue_len
= 50;
4315 /* generic HDLC layer callbacks and settings */
4316 hdlc
= dev_to_hdlc(dev
);
4317 hdlc
->attach
= hdlcdev_attach
;
4318 hdlc
->xmit
= hdlcdev_xmit
;
4320 /* register objects with HDLC layer */
4321 if ((rc
= register_hdlc_device(dev
))) {
4322 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4332 * called by device driver when removing device instance
4333 * do generic HDLC cleanup
4335 * info pointer to device instance information
4337 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4339 unregister_hdlc_device(info
->netdev
);
4340 free_netdev(info
->netdev
);
4341 info
->netdev
= NULL
;
4344 #endif /* CONFIG_HDLC */