2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.26 2004/08/11 19:30:02 paulkf Exp $
6 * Device driver for Microgate SyncLink PC Card
7 * multiprotocol serial adapter.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * This code is released under the GNU General Public License (GPL)
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
31 # define BREAKPOINT() asm(" int $3");
33 # define BREAKPOINT() { }
36 #define MAX_DEVICE_COUNT 4
38 #include <linux/config.h>
39 #include <linux/module.h>
40 #include <linux/errno.h>
41 #include <linux/signal.h>
42 #include <linux/sched.h>
43 #include <linux/timer.h>
44 #include <linux/time.h>
45 #include <linux/interrupt.h>
46 #include <linux/pci.h>
47 #include <linux/tty.h>
48 #include <linux/tty_flip.h>
49 #include <linux/serial.h>
50 #include <linux/major.h>
51 #include <linux/string.h>
52 #include <linux/fcntl.h>
53 #include <linux/ptrace.h>
54 #include <linux/ioport.h>
56 #include <linux/slab.h>
57 #include <linux/netdevice.h>
58 #include <linux/vmalloc.h>
59 #include <linux/init.h>
60 #include <asm/serial.h>
61 #include <linux/delay.h>
62 #include <linux/ioctl.h>
64 #include <asm/system.h>
68 #include <linux/bitops.h>
69 #include <asm/types.h>
70 #include <linux/termios.h>
71 #include <linux/workqueue.h>
72 #include <linux/hdlc.h>
74 #include <pcmcia/version.h>
75 #include <pcmcia/cs_types.h>
76 #include <pcmcia/cs.h>
77 #include <pcmcia/cistpl.h>
78 #include <pcmcia/cisreg.h>
79 #include <pcmcia/ds.h>
81 #ifdef CONFIG_HDLC_MODULE
85 #define GET_USER(error,value,addr) error = get_user(value,addr)
86 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
87 #define PUT_USER(error,value,addr) error = put_user(value,addr)
88 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
90 #include <asm/uaccess.h>
92 #include "linux/synclink.h"
94 static MGSL_PARAMS default_params
= {
95 MGSL_MODE_HDLC
, /* unsigned long mode */
96 0, /* unsigned char loopback; */
97 HDLC_FLAG_UNDERRUN_ABORT15
, /* unsigned short flags; */
98 HDLC_ENCODING_NRZI_SPACE
, /* unsigned char encoding; */
99 0, /* unsigned long clock_speed; */
100 0xff, /* unsigned char addr_filter; */
101 HDLC_CRC_16_CCITT
, /* unsigned short crc_type; */
102 HDLC_PREAMBLE_LENGTH_8BITS
, /* unsigned char preamble_length; */
103 HDLC_PREAMBLE_PATTERN_NONE
, /* unsigned char preamble; */
104 9600, /* unsigned long data_rate; */
105 8, /* unsigned char data_bits; */
106 1, /* unsigned char stop_bits; */
107 ASYNC_PARITY_NONE
/* unsigned char parity; */
113 unsigned char status
;
117 /* The queue of BH actions to be performed */
120 #define BH_TRANSMIT 2
123 #define IO_PIN_SHUTDOWN_LIMIT 100
125 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
127 struct _input_signal_events
{
140 * Device instance data structure
143 typedef struct _mgslpc_info
{
144 void *if_ptr
; /* General purpose pointer (used by SPPP) */
147 int count
; /* count of opens */
149 unsigned short close_delay
;
150 unsigned short closing_wait
; /* time to wait before closing */
152 struct mgsl_icount icount
;
154 struct tty_struct
*tty
;
156 int x_char
; /* xon/xoff character */
157 int blocked_open
; /* # of blocked opens */
158 unsigned char read_status_mask
;
159 unsigned char ignore_status_mask
;
161 unsigned char *tx_buf
;
166 /* circular list of fixed length rx buffers */
168 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
169 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
170 int rx_put
; /* index of next empty rx buffer */
171 int rx_get
; /* index of next full rx buffer */
172 int rx_buf_size
; /* size in bytes of single rx buffer */
173 int rx_buf_count
; /* total number of rx buffers */
174 int rx_frame_count
; /* number of full rx buffers */
176 wait_queue_head_t open_wait
;
177 wait_queue_head_t close_wait
;
179 wait_queue_head_t status_event_wait_q
;
180 wait_queue_head_t event_wait_q
;
181 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
182 struct _mgslpc_info
*next_device
; /* device list link */
184 unsigned short imra_value
;
185 unsigned short imrb_value
;
186 unsigned char pim_value
;
189 struct work_struct task
; /* task structure for scheduling bh */
198 int dcd_chkcount
; /* check counts to prevent */
199 int cts_chkcount
; /* too many IRQs if a signal */
200 int dsr_chkcount
; /* is floating */
211 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
213 char device_name
[25]; /* device instance name */
215 unsigned int io_base
; /* base I/O address of adapter */
216 unsigned int irq_level
;
218 MGSL_PARAMS params
; /* communications parameters */
220 unsigned char serial_signals
; /* current serial signal states */
222 char irq_occurred
; /* for diagnostics use */
224 unsigned int init_error
; /* startup error (DIAGS) */
226 char flag_buf
[MAX_ASYNC_BUFFER_SIZE
];
227 BOOLEAN drop_rts_on_tx_done
;
229 struct _input_signal_events input_signal_events
;
236 /* SPPP/Cisco HDLC device parts */
242 struct net_device
*netdev
;
247 #define MGSLPC_MAGIC 0x5402
250 * The size of the serial xmit buffer is 1 page, or 4096 bytes
252 #define TXBUFSIZE 4096
255 #define CHA 0x00 /* channel A offset */
256 #define CHB 0x40 /* channel B offset */
259 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
306 #define IRQ_BREAK_ON BIT15 // rx break detected
307 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
308 #define IRQ_ALLSENT BIT13 // all sent
309 #define IRQ_UNDERRUN BIT12 // transmit data underrun
310 #define IRQ_TIMER BIT11 // timer interrupt
311 #define IRQ_CTS BIT10 // CTS status change
312 #define IRQ_TXREPEAT BIT9 // tx message repeat
313 #define IRQ_TXFIFO BIT8 // transmit pool ready
314 #define IRQ_RXEOM BIT7 // receive message end
315 #define IRQ_EXITHUNT BIT6 // receive frame start
316 #define IRQ_RXTIME BIT6 // rx char timeout
317 #define IRQ_DCD BIT2 // carrier detect status change
318 #define IRQ_OVERRUN BIT1 // receive frame overflow
319 #define IRQ_RXFIFO BIT0 // receive pool full
323 #define XFW BIT6 // transmit FIFO write enable
324 #define CEC BIT2 // command executing
325 #define CTS BIT1 // CTS state
330 #define PVR_AUTOCTS BIT3
331 #define PVR_RS232 0x20 /* 0010b */
332 #define PVR_V35 0xe0 /* 1110b */
333 #define PVR_RS422 0x40 /* 0100b */
335 /* Register access functions */
337 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
338 #define read_reg(info, reg) inb((info)->io_base + (reg))
340 #define read_reg16(info, reg) inw((info)->io_base + (reg))
341 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
343 #define set_reg_bits(info, reg, mask) \
344 write_reg(info, (reg), \
345 (unsigned char) (read_reg(info, (reg)) | (mask)))
346 #define clear_reg_bits(info, reg, mask) \
347 write_reg(info, (reg), \
348 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
350 * interrupt enable/disable routines
352 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
354 if (channel
== CHA
) {
355 info
->imra_value
|= mask
;
356 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
358 info
->imrb_value
|= mask
;
359 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
362 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
364 if (channel
== CHA
) {
365 info
->imra_value
&= ~mask
;
366 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
368 info
->imrb_value
&= ~mask
;
369 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
373 #define port_irq_disable(info, mask) \
374 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
376 #define port_irq_enable(info, mask) \
377 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
379 static void rx_start(MGSLPC_INFO
*info
);
380 static void rx_stop(MGSLPC_INFO
*info
);
382 static void tx_start(MGSLPC_INFO
*info
);
383 static void tx_stop(MGSLPC_INFO
*info
);
384 static void tx_set_idle(MGSLPC_INFO
*info
);
386 static void get_signals(MGSLPC_INFO
*info
);
387 static void set_signals(MGSLPC_INFO
*info
);
389 static void reset_device(MGSLPC_INFO
*info
);
391 static void hdlc_mode(MGSLPC_INFO
*info
);
392 static void async_mode(MGSLPC_INFO
*info
);
394 static void tx_timeout(unsigned long context
);
396 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
);
399 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
400 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
401 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
402 static int hdlcdev_init(MGSLPC_INFO
*info
);
403 static void hdlcdev_exit(MGSLPC_INFO
*info
);
406 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
408 static BOOLEAN
register_test(MGSLPC_INFO
*info
);
409 static BOOLEAN
irq_test(MGSLPC_INFO
*info
);
410 static int adapter_test(MGSLPC_INFO
*info
);
412 static int claim_resources(MGSLPC_INFO
*info
);
413 static void release_resources(MGSLPC_INFO
*info
);
414 static void mgslpc_add_device(MGSLPC_INFO
*info
);
415 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
417 static int rx_get_frame(MGSLPC_INFO
*info
);
418 static void rx_reset_buffers(MGSLPC_INFO
*info
);
419 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
420 static void rx_free_buffers(MGSLPC_INFO
*info
);
422 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
, struct pt_regs
* regs
);
425 * Bottom half interrupt handlers
427 static void bh_handler(void* Context
);
428 static void bh_transmit(MGSLPC_INFO
*info
);
429 static void bh_status(MGSLPC_INFO
*info
);
434 static int tiocmget(struct tty_struct
*tty
, struct file
*file
);
435 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
436 unsigned int set
, unsigned int clear
);
437 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
438 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
439 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
);
440 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
441 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
442 static int set_txenable(MGSLPC_INFO
*info
, int enable
);
443 static int tx_abort(MGSLPC_INFO
*info
);
444 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
445 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
447 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
448 static int mgslpc_device_count
= 0;
451 * Set this param to non-zero to load eax with the
452 * .text section address and breakpoint on module load.
453 * This is useful for use with gdb and add-symbol-file command.
455 static int break_on_load
=0;
458 * Driver major number, defaults to zero to get auto
459 * assigned major number. May be forced as module parameter.
461 static int ttymajor
=0;
463 static int debug_level
= 0;
464 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
465 static int dosyncppp
[MAX_DEVICE_COUNT
] = {1,1,1,1};
467 module_param(break_on_load
, bool, 0);
468 module_param(ttymajor
, int, 0);
469 module_param(debug_level
, int, 0);
470 module_param_array(maxframe
, int, NULL
, 0);
471 module_param_array(dosyncppp
, int, NULL
, 0);
473 MODULE_LICENSE("GPL");
475 static char *driver_name
= "SyncLink PC Card driver";
476 static char *driver_version
= "$Revision: 4.26 $";
478 static struct tty_driver
*serial_driver
;
480 /* number of characters left in xmit buffer before we ask for more */
481 #define WAKEUP_CHARS 256
483 static void mgslpc_change_params(MGSLPC_INFO
*info
);
484 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
486 /* PCMCIA prototypes */
488 static void mgslpc_config(dev_link_t
*link
);
489 static void mgslpc_release(u_long arg
);
490 static int mgslpc_event(event_t event
, int priority
,
491 event_callback_args_t
*args
);
492 static dev_link_t
*mgslpc_attach(void);
493 static void mgslpc_detach(dev_link_t
*);
495 static dev_info_t dev_info
= "synclink_cs";
496 static dev_link_t
*dev_list
= NULL
;
499 * 1st function defined in .text section. Calling this function in
500 * init_module() followed by a breakpoint allows a remote debugger
501 * (gdb) to get the .text address for the add-symbol-file command.
502 * This allows remote debugging of dynamically loadable modules.
504 static void* mgslpc_get_text_ptr(void)
506 return mgslpc_get_text_ptr
;
510 * line discipline callback wrappers
512 * The wrappers maintain line discipline references
513 * while calling into the line discipline.
515 * ldisc_flush_buffer - flush line discipline receive buffers
516 * ldisc_receive_buf - pass receive data to line discipline
519 static void ldisc_flush_buffer(struct tty_struct
*tty
)
521 struct tty_ldisc
*ld
= tty_ldisc_ref(tty
);
523 if (ld
->flush_buffer
)
524 ld
->flush_buffer(tty
);
529 static void ldisc_receive_buf(struct tty_struct
*tty
,
530 const __u8
*data
, char *flags
, int count
)
532 struct tty_ldisc
*ld
;
535 ld
= tty_ldisc_ref(tty
);
538 ld
->receive_buf(tty
, data
, flags
, count
);
543 static dev_link_t
*mgslpc_attach(void)
547 client_reg_t client_reg
;
550 if (debug_level
>= DEBUG_LEVEL_INFO
)
551 printk("mgslpc_attach\n");
553 info
= (MGSLPC_INFO
*)kmalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
555 printk("Error can't allocate device instance data\n");
559 memset(info
, 0, sizeof(MGSLPC_INFO
));
560 info
->magic
= MGSLPC_MAGIC
;
561 INIT_WORK(&info
->task
, bh_handler
, info
);
562 info
->max_frame_size
= 4096;
563 info
->close_delay
= 5*HZ
/10;
564 info
->closing_wait
= 30*HZ
;
565 init_waitqueue_head(&info
->open_wait
);
566 init_waitqueue_head(&info
->close_wait
);
567 init_waitqueue_head(&info
->status_event_wait_q
);
568 init_waitqueue_head(&info
->event_wait_q
);
569 spin_lock_init(&info
->lock
);
570 spin_lock_init(&info
->netlock
);
571 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
572 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
573 info
->imra_value
= 0xffff;
574 info
->imrb_value
= 0xffff;
575 info
->pim_value
= 0xff;
580 /* Initialize the dev_link_t structure */
582 /* Interrupt setup */
583 link
->irq
.Attributes
= IRQ_TYPE_EXCLUSIVE
;
584 link
->irq
.IRQInfo1
= IRQ_LEVEL_ID
;
585 link
->irq
.Handler
= NULL
;
587 link
->conf
.Attributes
= 0;
589 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
591 /* Register with Card Services */
592 link
->next
= dev_list
;
595 client_reg
.dev_info
= &dev_info
;
596 client_reg
.EventMask
=
597 CS_EVENT_CARD_INSERTION
| CS_EVENT_CARD_REMOVAL
|
598 CS_EVENT_RESET_PHYSICAL
| CS_EVENT_CARD_RESET
|
599 CS_EVENT_PM_SUSPEND
| CS_EVENT_PM_RESUME
;
600 client_reg
.event_handler
= &mgslpc_event
;
601 client_reg
.Version
= 0x0210;
602 client_reg
.event_callback_args
.client_data
= link
;
604 ret
= pcmcia_register_client(&link
->handle
, &client_reg
);
605 if (ret
!= CS_SUCCESS
) {
606 cs_error(link
->handle
, RegisterClient
, ret
);
611 mgslpc_add_device(info
);
616 /* Card has been inserted.
619 #define CS_CHECK(fn, ret) \
620 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
622 static void mgslpc_config(dev_link_t
*link
)
624 client_handle_t handle
= link
->handle
;
625 MGSLPC_INFO
*info
= link
->priv
;
628 int last_fn
, last_ret
;
631 cistpl_cftable_entry_t dflt
= { 0 };
632 cistpl_cftable_entry_t
*cfg
;
634 if (debug_level
>= DEBUG_LEVEL_INFO
)
635 printk("mgslpc_config(0x%p)\n", link
);
637 /* read CONFIG tuple to find its configuration registers */
638 tuple
.DesiredTuple
= CISTPL_CONFIG
;
639 tuple
.Attributes
= 0;
640 tuple
.TupleData
= buf
;
641 tuple
.TupleDataMax
= sizeof(buf
);
642 tuple
.TupleOffset
= 0;
643 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(handle
, &tuple
));
644 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(handle
, &tuple
));
645 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(handle
, &tuple
, &parse
));
646 link
->conf
.ConfigBase
= parse
.config
.base
;
647 link
->conf
.Present
= parse
.config
.rmask
[0];
650 link
->state
|= DEV_CONFIG
;
652 /* Look up the current Vcc */
653 CS_CHECK(GetConfigurationInfo
, pcmcia_get_configuration_info(handle
, &conf
));
654 link
->conf
.Vcc
= conf
.Vcc
;
656 /* get CIS configuration entry */
658 tuple
.DesiredTuple
= CISTPL_CFTABLE_ENTRY
;
659 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(handle
, &tuple
));
661 cfg
= &(parse
.cftable_entry
);
662 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(handle
, &tuple
));
663 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(handle
, &tuple
, &parse
));
665 if (cfg
->flags
& CISTPL_CFTABLE_DEFAULT
) dflt
= *cfg
;
669 link
->conf
.ConfigIndex
= cfg
->index
;
670 link
->conf
.Attributes
|= CONF_ENABLE_IRQ
;
672 /* IO window settings */
673 link
->io
.NumPorts1
= 0;
674 if ((cfg
->io
.nwin
> 0) || (dflt
.io
.nwin
> 0)) {
675 cistpl_io_t
*io
= (cfg
->io
.nwin
) ? &cfg
->io
: &dflt
.io
;
676 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_AUTO
;
677 if (!(io
->flags
& CISTPL_IO_8BIT
))
678 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_16
;
679 if (!(io
->flags
& CISTPL_IO_16BIT
))
680 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_8
;
681 link
->io
.IOAddrLines
= io
->flags
& CISTPL_IO_LINES_MASK
;
682 link
->io
.BasePort1
= io
->win
[0].base
;
683 link
->io
.NumPorts1
= io
->win
[0].len
;
684 CS_CHECK(RequestIO
, pcmcia_request_io(link
->handle
, &link
->io
));
687 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
689 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
690 link
->conf
.ConfigIndex
= 8;
691 link
->conf
.Present
= PRESENT_OPTION
;
693 link
->irq
.Attributes
|= IRQ_HANDLE_PRESENT
;
694 link
->irq
.Handler
= mgslpc_isr
;
695 link
->irq
.Instance
= info
;
696 CS_CHECK(RequestIRQ
, pcmcia_request_irq(link
->handle
, &link
->irq
));
698 CS_CHECK(RequestConfiguration
, pcmcia_request_configuration(link
->handle
, &link
->conf
));
700 info
->io_base
= link
->io
.BasePort1
;
701 info
->irq_level
= link
->irq
.AssignedIRQ
;
703 /* add to linked list of devices */
704 sprintf(info
->node
.dev_name
, "mgslpc0");
705 info
->node
.major
= info
->node
.minor
= 0;
706 link
->dev
= &info
->node
;
708 printk(KERN_INFO
"%s: index 0x%02x:",
709 info
->node
.dev_name
, link
->conf
.ConfigIndex
);
710 if (link
->conf
.Attributes
& CONF_ENABLE_IRQ
)
711 printk(", irq %d", link
->irq
.AssignedIRQ
);
712 if (link
->io
.NumPorts1
)
713 printk(", io 0x%04x-0x%04x", link
->io
.BasePort1
,
714 link
->io
.BasePort1
+link
->io
.NumPorts1
-1);
717 link
->state
&= ~DEV_CONFIG_PENDING
;
721 cs_error(link
->handle
, last_fn
, last_ret
);
722 mgslpc_release((u_long
)link
);
725 /* Card has been removed.
726 * Unregister device and release PCMCIA configuration.
727 * If device is open, postpone until it is closed.
729 static void mgslpc_release(u_long arg
)
731 dev_link_t
*link
= (dev_link_t
*)arg
;
733 if (debug_level
>= DEBUG_LEVEL_INFO
)
734 printk("mgslpc_release(0x%p)\n", link
);
736 /* Unlink the device chain */
738 link
->state
&= ~DEV_CONFIG
;
740 pcmcia_release_configuration(link
->handle
);
741 if (link
->io
.NumPorts1
)
742 pcmcia_release_io(link
->handle
, &link
->io
);
743 if (link
->irq
.AssignedIRQ
)
744 pcmcia_release_irq(link
->handle
, &link
->irq
);
745 if (link
->state
& DEV_STALE_LINK
)
749 static void mgslpc_detach(dev_link_t
*link
)
753 if (debug_level
>= DEBUG_LEVEL_INFO
)
754 printk("mgslpc_detach(0x%p)\n", link
);
757 for (linkp
= &dev_list
; *linkp
; linkp
= &(*linkp
)->next
)
758 if (*linkp
== link
) break;
762 if (link
->state
& DEV_CONFIG
) {
763 /* device is configured/active, mark it so when
764 * release() is called a proper detach() occurs.
766 if (debug_level
>= DEBUG_LEVEL_INFO
)
767 printk(KERN_DEBUG
"synclinkpc: detach postponed, '%s' "
768 "still locked\n", link
->dev
->dev_name
);
769 link
->state
|= DEV_STALE_LINK
;
773 /* Break the link with Card Services */
775 pcmcia_deregister_client(link
->handle
);
777 /* Unlink device structure, and free it */
779 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
782 static int mgslpc_event(event_t event
, int priority
,
783 event_callback_args_t
*args
)
785 dev_link_t
*link
= args
->client_data
;
786 MGSLPC_INFO
*info
= link
->priv
;
788 if (debug_level
>= DEBUG_LEVEL_INFO
)
789 printk("mgslpc_event(0x%06x)\n", event
);
792 case CS_EVENT_CARD_REMOVAL
:
793 link
->state
&= ~DEV_PRESENT
;
794 if (link
->state
& DEV_CONFIG
) {
795 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
796 mgslpc_release((u_long
)link
);
799 case CS_EVENT_CARD_INSERTION
:
800 link
->state
|= DEV_PRESENT
| DEV_CONFIG_PENDING
;
803 case CS_EVENT_PM_SUSPEND
:
804 link
->state
|= DEV_SUSPEND
;
805 /* Fall through... */
806 case CS_EVENT_RESET_PHYSICAL
:
807 /* Mark the device as stopped, to block IO until later */
809 if (link
->state
& DEV_CONFIG
)
810 pcmcia_release_configuration(link
->handle
);
812 case CS_EVENT_PM_RESUME
:
813 link
->state
&= ~DEV_SUSPEND
;
814 /* Fall through... */
815 case CS_EVENT_CARD_RESET
:
816 if (link
->state
& DEV_CONFIG
)
817 pcmcia_request_configuration(link
->handle
, &link
->conf
);
824 static inline int mgslpc_paranoia_check(MGSLPC_INFO
*info
,
825 char *name
, const char *routine
)
827 #ifdef MGSLPC_PARANOIA_CHECK
828 static const char *badmagic
=
829 "Warning: bad magic number for mgsl struct (%s) in %s\n";
830 static const char *badinfo
=
831 "Warning: null mgslpc_info for (%s) in %s\n";
834 printk(badinfo
, name
, routine
);
837 if (info
->magic
!= MGSLPC_MAGIC
) {
838 printk(badmagic
, name
, routine
);
849 #define CMD_RXFIFO BIT7 // release current rx FIFO
850 #define CMD_RXRESET BIT6 // receiver reset
851 #define CMD_RXFIFO_READ BIT5
852 #define CMD_START_TIMER BIT4
853 #define CMD_TXFIFO BIT3 // release current tx FIFO
854 #define CMD_TXEOM BIT1 // transmit end message
855 #define CMD_TXRESET BIT0 // transmit reset
857 static BOOLEAN
wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
860 /* wait for command completion */
861 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
869 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
871 wait_command_complete(info
, channel
);
872 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
875 static void tx_pause(struct tty_struct
*tty
)
877 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
880 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
882 if (debug_level
>= DEBUG_LEVEL_INFO
)
883 printk("tx_pause(%s)\n",info
->device_name
);
885 spin_lock_irqsave(&info
->lock
,flags
);
886 if (info
->tx_enabled
)
888 spin_unlock_irqrestore(&info
->lock
,flags
);
891 static void tx_release(struct tty_struct
*tty
)
893 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
896 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
898 if (debug_level
>= DEBUG_LEVEL_INFO
)
899 printk("tx_release(%s)\n",info
->device_name
);
901 spin_lock_irqsave(&info
->lock
,flags
);
902 if (!info
->tx_enabled
)
904 spin_unlock_irqrestore(&info
->lock
,flags
);
907 /* Return next bottom half action to perform.
908 * or 0 if nothing to do.
910 static int bh_action(MGSLPC_INFO
*info
)
915 spin_lock_irqsave(&info
->lock
,flags
);
917 if (info
->pending_bh
& BH_RECEIVE
) {
918 info
->pending_bh
&= ~BH_RECEIVE
;
920 } else if (info
->pending_bh
& BH_TRANSMIT
) {
921 info
->pending_bh
&= ~BH_TRANSMIT
;
923 } else if (info
->pending_bh
& BH_STATUS
) {
924 info
->pending_bh
&= ~BH_STATUS
;
929 /* Mark BH routine as complete */
930 info
->bh_running
= 0;
931 info
->bh_requested
= 0;
934 spin_unlock_irqrestore(&info
->lock
,flags
);
939 void bh_handler(void* Context
)
941 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)Context
;
947 if (debug_level
>= DEBUG_LEVEL_BH
)
948 printk( "%s(%d):bh_handler(%s) entry\n",
949 __FILE__
,__LINE__
,info
->device_name
);
951 info
->bh_running
= 1;
953 while((action
= bh_action(info
)) != 0) {
955 /* Process work item */
956 if ( debug_level
>= DEBUG_LEVEL_BH
)
957 printk( "%s(%d):bh_handler() work item action=%d\n",
958 __FILE__
,__LINE__
,action
);
963 while(rx_get_frame(info
));
972 /* unknown work item ID */
973 printk("Unknown work item ID=%08X!\n", action
);
978 if (debug_level
>= DEBUG_LEVEL_BH
)
979 printk( "%s(%d):bh_handler(%s) exit\n",
980 __FILE__
,__LINE__
,info
->device_name
);
983 void bh_transmit(MGSLPC_INFO
*info
)
985 struct tty_struct
*tty
= info
->tty
;
986 if (debug_level
>= DEBUG_LEVEL_BH
)
987 printk("bh_transmit() entry on %s\n", info
->device_name
);
991 wake_up_interruptible(&tty
->write_wait
);
995 void bh_status(MGSLPC_INFO
*info
)
997 info
->ri_chkcount
= 0;
998 info
->dsr_chkcount
= 0;
999 info
->dcd_chkcount
= 0;
1000 info
->cts_chkcount
= 0;
1003 /* eom: non-zero = end of frame */
1004 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
1006 unsigned char data
[2];
1007 unsigned char fifo_count
, read_count
, i
;
1008 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
1010 if (debug_level
>= DEBUG_LEVEL_ISR
)
1011 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__
,__LINE__
,eom
);
1013 if (!info
->rx_enabled
)
1016 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
1017 /* no more free buffers */
1018 issue_command(info
, CHA
, CMD_RXRESET
);
1019 info
->pending_bh
|= BH_RECEIVE
;
1020 info
->rx_overflow
= 1;
1021 info
->icount
.buf_overrun
++;
1026 /* end of frame, get FIFO count from RBCL register */
1027 if (!(fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f)))
1033 if (fifo_count
== 1) {
1035 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
1038 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
1040 fifo_count
-= read_count
;
1041 if (!fifo_count
&& eom
)
1042 buf
->status
= data
[--read_count
];
1044 for (i
= 0; i
< read_count
; i
++) {
1045 if (buf
->count
>= info
->max_frame_size
) {
1046 /* frame too large, reset receiver and reset current buffer */
1047 issue_command(info
, CHA
, CMD_RXRESET
);
1051 *(buf
->data
+ buf
->count
) = data
[i
];
1054 } while (fifo_count
);
1057 info
->pending_bh
|= BH_RECEIVE
;
1058 info
->rx_frame_count
++;
1060 if (info
->rx_put
>= info
->rx_buf_count
)
1063 issue_command(info
, CHA
, CMD_RXFIFO
);
1066 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
)
1068 unsigned char data
, status
;
1070 struct tty_struct
*tty
= info
->tty
;
1071 struct mgsl_icount
*icount
= &info
->icount
;
1074 /* early termination, get FIFO count from RBCL register */
1075 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
1077 /* Zero fifo count could mean 0 or 32 bytes available.
1078 * If BIT5 of STAR is set then at least 1 byte is available.
1080 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
1085 /* Flush received async data to receive data buffer. */
1086 while (fifo_count
) {
1087 data
= read_reg(info
, CHA
+ RXFIFO
);
1088 status
= read_reg(info
, CHA
+ RXFIFO
);
1091 if (tty
->flip
.count
>= TTY_FLIPBUF_SIZE
)
1094 *tty
->flip
.char_buf_ptr
= data
;
1097 *tty
->flip
.flag_buf_ptr
= 0;
1099 // if no frameing/crc error then save data
1100 // BIT7:parity error
1101 // BIT6:framing error
1103 if (status
& (BIT7
+ BIT6
)) {
1109 /* discard char if tty control flags say so */
1110 if (status
& info
->ignore_status_mask
)
1113 status
&= info
->read_status_mask
;
1116 *tty
->flip
.flag_buf_ptr
= TTY_PARITY
;
1117 else if (status
& BIT6
)
1118 *tty
->flip
.flag_buf_ptr
= TTY_FRAME
;
1121 tty
->flip
.flag_buf_ptr
++;
1122 tty
->flip
.char_buf_ptr
++;
1125 issue_command(info
, CHA
, CMD_RXFIFO
);
1127 if (debug_level
>= DEBUG_LEVEL_ISR
) {
1128 printk("%s(%d):rx_ready_async count=%d\n",
1129 __FILE__
,__LINE__
,tty
->flip
.count
);
1130 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1131 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
1132 icount
->parity
,icount
->frame
,icount
->overrun
);
1135 if (tty
->flip
.count
)
1136 tty_flip_buffer_push(tty
);
1140 static void tx_done(MGSLPC_INFO
*info
)
1142 if (!info
->tx_active
)
1145 info
->tx_active
= 0;
1146 info
->tx_aborting
= 0;
1148 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
1151 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1152 del_timer(&info
->tx_timer
);
1154 if (info
->drop_rts_on_tx_done
) {
1156 if (info
->serial_signals
& SerialSignal_RTS
) {
1157 info
->serial_signals
&= ~SerialSignal_RTS
;
1160 info
->drop_rts_on_tx_done
= 0;
1165 hdlcdev_tx_done(info
);
1169 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1173 info
->pending_bh
|= BH_TRANSMIT
;
1177 static void tx_ready(MGSLPC_INFO
*info
)
1179 unsigned char fifo_count
= 32;
1182 if (debug_level
>= DEBUG_LEVEL_ISR
)
1183 printk("%s(%d):tx_ready(%s)\n", __FILE__
,__LINE__
,info
->device_name
);
1185 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1186 if (!info
->tx_active
)
1189 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1193 if (!info
->tx_count
)
1194 info
->tx_active
= 0;
1197 if (!info
->tx_count
)
1200 while (info
->tx_count
&& fifo_count
) {
1201 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1204 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1206 write_reg16(info
, CHA
+ TXFIFO
,
1207 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1209 info
->tx_count
-= c
;
1210 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1214 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1215 if (info
->tx_count
< WAKEUP_CHARS
)
1216 info
->pending_bh
|= BH_TRANSMIT
;
1217 issue_command(info
, CHA
, CMD_TXFIFO
);
1220 issue_command(info
, CHA
, CMD_TXFIFO
);
1222 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1226 static void cts_change(MGSLPC_INFO
*info
)
1229 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1230 irq_disable(info
, CHB
, IRQ_CTS
);
1232 if (info
->serial_signals
& SerialSignal_CTS
)
1233 info
->input_signal_events
.cts_up
++;
1235 info
->input_signal_events
.cts_down
++;
1236 wake_up_interruptible(&info
->status_event_wait_q
);
1237 wake_up_interruptible(&info
->event_wait_q
);
1239 if (info
->flags
& ASYNC_CTS_FLOW
) {
1240 if (info
->tty
->hw_stopped
) {
1241 if (info
->serial_signals
& SerialSignal_CTS
) {
1242 if (debug_level
>= DEBUG_LEVEL_ISR
)
1243 printk("CTS tx start...");
1245 info
->tty
->hw_stopped
= 0;
1247 info
->pending_bh
|= BH_TRANSMIT
;
1251 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1252 if (debug_level
>= DEBUG_LEVEL_ISR
)
1253 printk("CTS tx stop...");
1255 info
->tty
->hw_stopped
= 1;
1260 info
->pending_bh
|= BH_STATUS
;
1263 static void dcd_change(MGSLPC_INFO
*info
)
1266 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1267 irq_disable(info
, CHB
, IRQ_DCD
);
1269 if (info
->serial_signals
& SerialSignal_DCD
) {
1270 info
->input_signal_events
.dcd_up
++;
1273 info
->input_signal_events
.dcd_down
++;
1276 hdlc_set_carrier(info
->serial_signals
& SerialSignal_DCD
, info
->netdev
);
1278 wake_up_interruptible(&info
->status_event_wait_q
);
1279 wake_up_interruptible(&info
->event_wait_q
);
1281 if (info
->flags
& ASYNC_CHECK_CD
) {
1282 if (debug_level
>= DEBUG_LEVEL_ISR
)
1283 printk("%s CD now %s...", info
->device_name
,
1284 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1285 if (info
->serial_signals
& SerialSignal_DCD
)
1286 wake_up_interruptible(&info
->open_wait
);
1288 if (debug_level
>= DEBUG_LEVEL_ISR
)
1289 printk("doing serial hangup...");
1291 tty_hangup(info
->tty
);
1294 info
->pending_bh
|= BH_STATUS
;
1297 static void dsr_change(MGSLPC_INFO
*info
)
1300 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1301 port_irq_disable(info
, PVR_DSR
);
1303 if (info
->serial_signals
& SerialSignal_DSR
)
1304 info
->input_signal_events
.dsr_up
++;
1306 info
->input_signal_events
.dsr_down
++;
1307 wake_up_interruptible(&info
->status_event_wait_q
);
1308 wake_up_interruptible(&info
->event_wait_q
);
1309 info
->pending_bh
|= BH_STATUS
;
1312 static void ri_change(MGSLPC_INFO
*info
)
1315 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1316 port_irq_disable(info
, PVR_RI
);
1318 if (info
->serial_signals
& SerialSignal_RI
)
1319 info
->input_signal_events
.ri_up
++;
1321 info
->input_signal_events
.ri_down
++;
1322 wake_up_interruptible(&info
->status_event_wait_q
);
1323 wake_up_interruptible(&info
->event_wait_q
);
1324 info
->pending_bh
|= BH_STATUS
;
1327 /* Interrupt service routine entry point.
1331 * irq interrupt number that caused interrupt
1332 * dev_id device ID supplied during interrupt registration
1333 * regs interrupted processor context
1335 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
, struct pt_regs
* regs
)
1337 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)dev_id
;
1339 unsigned char gis
, pis
;
1342 if (debug_level
>= DEBUG_LEVEL_ISR
)
1343 printk("mgslpc_isr(%d) entry.\n", irq
);
1347 if (!(info
->link
.state
& DEV_CONFIG
))
1350 spin_lock(&info
->lock
);
1352 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1353 if (debug_level
>= DEBUG_LEVEL_ISR
)
1354 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1356 if ((gis
& 0x70) || count
> 1000) {
1357 printk("synclink_cs:hardware failed or ejected\n");
1362 if (gis
& (BIT1
+ BIT0
)) {
1363 isr
= read_reg16(info
, CHB
+ ISR
);
1369 if (gis
& (BIT3
+ BIT2
))
1371 isr
= read_reg16(info
, CHA
+ ISR
);
1372 if (isr
& IRQ_TIMER
) {
1373 info
->irq_occurred
= 1;
1374 irq_disable(info
, CHA
, IRQ_TIMER
);
1378 if (isr
& IRQ_EXITHUNT
) {
1379 info
->icount
.exithunt
++;
1380 wake_up_interruptible(&info
->event_wait_q
);
1382 if (isr
& IRQ_BREAK_ON
) {
1384 if (info
->flags
& ASYNC_SAK
)
1387 if (isr
& IRQ_RXTIME
) {
1388 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1390 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1391 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1392 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1394 rx_ready_async(info
, isr
& IRQ_RXEOM
);
1398 if (isr
& IRQ_UNDERRUN
) {
1399 if (info
->tx_aborting
)
1400 info
->icount
.txabort
++;
1402 info
->icount
.txunder
++;
1405 else if (isr
& IRQ_ALLSENT
) {
1406 info
->icount
.txok
++;
1409 else if (isr
& IRQ_TXFIFO
)
1413 pis
= read_reg(info
, CHA
+ PIS
);
1421 /* Request bottom half processing if there's something
1422 * for it to do and the bh is not already running
1425 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1426 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1427 printk("%s(%d):%s queueing bh task.\n",
1428 __FILE__
,__LINE__
,info
->device_name
);
1429 schedule_work(&info
->task
);
1430 info
->bh_requested
= 1;
1433 spin_unlock(&info
->lock
);
1435 if (debug_level
>= DEBUG_LEVEL_ISR
)
1436 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1437 __FILE__
,__LINE__
,irq
);
1442 /* Initialize and start device.
1444 static int startup(MGSLPC_INFO
* info
)
1448 if (debug_level
>= DEBUG_LEVEL_INFO
)
1449 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1451 if (info
->flags
& ASYNC_INITIALIZED
)
1454 if (!info
->tx_buf
) {
1455 /* allocate a page of memory for a transmit buffer */
1456 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1457 if (!info
->tx_buf
) {
1458 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1459 __FILE__
,__LINE__
,info
->device_name
);
1464 info
->pending_bh
= 0;
1466 init_timer(&info
->tx_timer
);
1467 info
->tx_timer
.data
= (unsigned long)info
;
1468 info
->tx_timer
.function
= tx_timeout
;
1470 /* Allocate and claim adapter resources */
1471 retval
= claim_resources(info
);
1473 /* perform existance check and diagnostics */
1475 retval
= adapter_test(info
);
1478 if (capable(CAP_SYS_ADMIN
) && info
->tty
)
1479 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1480 release_resources(info
);
1484 /* program hardware for current parameters */
1485 mgslpc_change_params(info
);
1488 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1490 info
->flags
|= ASYNC_INITIALIZED
;
1495 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1497 static void shutdown(MGSLPC_INFO
* info
)
1499 unsigned long flags
;
1501 if (!(info
->flags
& ASYNC_INITIALIZED
))
1504 if (debug_level
>= DEBUG_LEVEL_INFO
)
1505 printk("%s(%d):mgslpc_shutdown(%s)\n",
1506 __FILE__
,__LINE__
, info
->device_name
);
1508 /* clear status wait queue because status changes */
1509 /* can't happen after shutting down the hardware */
1510 wake_up_interruptible(&info
->status_event_wait_q
);
1511 wake_up_interruptible(&info
->event_wait_q
);
1513 del_timer(&info
->tx_timer
);
1516 free_page((unsigned long) info
->tx_buf
);
1517 info
->tx_buf
= NULL
;
1520 spin_lock_irqsave(&info
->lock
,flags
);
1525 /* TODO:disable interrupts instead of reset to preserve signal states */
1528 if (!info
->tty
|| info
->tty
->termios
->c_cflag
& HUPCL
) {
1529 info
->serial_signals
&= ~(SerialSignal_DTR
+ SerialSignal_RTS
);
1533 spin_unlock_irqrestore(&info
->lock
,flags
);
1535 release_resources(info
);
1538 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1540 info
->flags
&= ~ASYNC_INITIALIZED
;
1543 static void mgslpc_program_hw(MGSLPC_INFO
*info
)
1545 unsigned long flags
;
1547 spin_lock_irqsave(&info
->lock
,flags
);
1551 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1553 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1560 info
->dcd_chkcount
= 0;
1561 info
->cts_chkcount
= 0;
1562 info
->ri_chkcount
= 0;
1563 info
->dsr_chkcount
= 0;
1565 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1566 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1569 if (info
->netcount
|| info
->tty
->termios
->c_cflag
& CREAD
)
1572 spin_unlock_irqrestore(&info
->lock
,flags
);
1575 /* Reconfigure adapter based on new parameters
1577 static void mgslpc_change_params(MGSLPC_INFO
*info
)
1582 if (!info
->tty
|| !info
->tty
->termios
)
1585 if (debug_level
>= DEBUG_LEVEL_INFO
)
1586 printk("%s(%d):mgslpc_change_params(%s)\n",
1587 __FILE__
,__LINE__
, info
->device_name
);
1589 cflag
= info
->tty
->termios
->c_cflag
;
1591 /* if B0 rate (hangup) specified then negate DTR and RTS */
1592 /* otherwise assert DTR and RTS */
1594 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
1596 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
1598 /* byte size and parity */
1600 switch (cflag
& CSIZE
) {
1601 case CS5
: info
->params
.data_bits
= 5; break;
1602 case CS6
: info
->params
.data_bits
= 6; break;
1603 case CS7
: info
->params
.data_bits
= 7; break;
1604 case CS8
: info
->params
.data_bits
= 8; break;
1605 default: info
->params
.data_bits
= 7; break;
1609 info
->params
.stop_bits
= 2;
1611 info
->params
.stop_bits
= 1;
1613 info
->params
.parity
= ASYNC_PARITY_NONE
;
1614 if (cflag
& PARENB
) {
1616 info
->params
.parity
= ASYNC_PARITY_ODD
;
1618 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1621 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1625 /* calculate number of jiffies to transmit a full
1626 * FIFO (32 bytes) at specified data rate
1628 bits_per_char
= info
->params
.data_bits
+
1629 info
->params
.stop_bits
+ 1;
1631 /* if port data rate is set to 460800 or less then
1632 * allow tty settings to override, otherwise keep the
1633 * current data rate.
1635 if (info
->params
.data_rate
<= 460800) {
1636 info
->params
.data_rate
= tty_get_baud_rate(info
->tty
);
1639 if ( info
->params
.data_rate
) {
1640 info
->timeout
= (32*HZ
*bits_per_char
) /
1641 info
->params
.data_rate
;
1643 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1645 if (cflag
& CRTSCTS
)
1646 info
->flags
|= ASYNC_CTS_FLOW
;
1648 info
->flags
&= ~ASYNC_CTS_FLOW
;
1651 info
->flags
&= ~ASYNC_CHECK_CD
;
1653 info
->flags
|= ASYNC_CHECK_CD
;
1655 /* process tty input control flags */
1657 info
->read_status_mask
= 0;
1658 if (I_INPCK(info
->tty
))
1659 info
->read_status_mask
|= BIT7
| BIT6
;
1660 if (I_IGNPAR(info
->tty
))
1661 info
->ignore_status_mask
|= BIT7
| BIT6
;
1663 mgslpc_program_hw(info
);
1666 /* Add a character to the transmit buffer
1668 static void mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1670 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1671 unsigned long flags
;
1673 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1674 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1675 __FILE__
,__LINE__
,ch
,info
->device_name
);
1678 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1681 if (!tty
|| !info
->tx_buf
)
1684 spin_lock_irqsave(&info
->lock
,flags
);
1686 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1687 if (info
->tx_count
< TXBUFSIZE
- 1) {
1688 info
->tx_buf
[info
->tx_put
++] = ch
;
1689 info
->tx_put
&= TXBUFSIZE
-1;
1694 spin_unlock_irqrestore(&info
->lock
,flags
);
1697 /* Enable transmitter so remaining characters in the
1698 * transmit buffer are sent.
1700 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1702 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1703 unsigned long flags
;
1705 if (debug_level
>= DEBUG_LEVEL_INFO
)
1706 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1707 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1709 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1712 if (info
->tx_count
<= 0 || tty
->stopped
||
1713 tty
->hw_stopped
|| !info
->tx_buf
)
1716 if (debug_level
>= DEBUG_LEVEL_INFO
)
1717 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1718 __FILE__
,__LINE__
,info
->device_name
);
1720 spin_lock_irqsave(&info
->lock
,flags
);
1721 if (!info
->tx_active
)
1723 spin_unlock_irqrestore(&info
->lock
,flags
);
1726 /* Send a block of data
1730 * tty pointer to tty information structure
1731 * buf pointer to buffer containing send data
1732 * count size of send data in bytes
1734 * Returns: number of characters written
1736 static int mgslpc_write(struct tty_struct
* tty
,
1737 const unsigned char *buf
, int count
)
1740 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1741 unsigned long flags
;
1743 if (debug_level
>= DEBUG_LEVEL_INFO
)
1744 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1745 __FILE__
,__LINE__
,info
->device_name
,count
);
1747 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1748 !tty
|| !info
->tx_buf
)
1751 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1752 if (count
> TXBUFSIZE
) {
1756 if (info
->tx_active
)
1758 else if (info
->tx_count
)
1764 min(TXBUFSIZE
- info
->tx_count
- 1,
1765 TXBUFSIZE
- info
->tx_put
));
1769 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1771 spin_lock_irqsave(&info
->lock
,flags
);
1772 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1773 info
->tx_count
+= c
;
1774 spin_unlock_irqrestore(&info
->lock
,flags
);
1781 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
1782 spin_lock_irqsave(&info
->lock
,flags
);
1783 if (!info
->tx_active
)
1785 spin_unlock_irqrestore(&info
->lock
,flags
);
1788 if (debug_level
>= DEBUG_LEVEL_INFO
)
1789 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1790 __FILE__
,__LINE__
,info
->device_name
,ret
);
1794 /* Return the count of free bytes in transmit buffer
1796 static int mgslpc_write_room(struct tty_struct
*tty
)
1798 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1801 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1804 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1805 /* HDLC (frame oriented) mode */
1806 if (info
->tx_active
)
1809 return HDLC_MAX_FRAME_SIZE
;
1811 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1816 if (debug_level
>= DEBUG_LEVEL_INFO
)
1817 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1818 __FILE__
,__LINE__
, info
->device_name
, ret
);
1822 /* Return the count of bytes in transmit buffer
1824 static int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1826 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1829 if (debug_level
>= DEBUG_LEVEL_INFO
)
1830 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1831 __FILE__
,__LINE__
, info
->device_name
);
1833 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1836 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1837 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1839 rc
= info
->tx_count
;
1841 if (debug_level
>= DEBUG_LEVEL_INFO
)
1842 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1843 __FILE__
,__LINE__
, info
->device_name
, rc
);
1848 /* Discard all data in the send buffer
1850 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1852 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1853 unsigned long flags
;
1855 if (debug_level
>= DEBUG_LEVEL_INFO
)
1856 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1857 __FILE__
,__LINE__
, info
->device_name
);
1859 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1862 spin_lock_irqsave(&info
->lock
,flags
);
1863 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1864 del_timer(&info
->tx_timer
);
1865 spin_unlock_irqrestore(&info
->lock
,flags
);
1867 wake_up_interruptible(&tty
->write_wait
);
1871 /* Send a high-priority XON/XOFF character
1873 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1875 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1876 unsigned long flags
;
1878 if (debug_level
>= DEBUG_LEVEL_INFO
)
1879 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1880 __FILE__
,__LINE__
, info
->device_name
, ch
);
1882 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1887 spin_lock_irqsave(&info
->lock
,flags
);
1888 if (!info
->tx_enabled
)
1890 spin_unlock_irqrestore(&info
->lock
,flags
);
1894 /* Signal remote device to throttle send data (our receive data)
1896 static void mgslpc_throttle(struct tty_struct
* tty
)
1898 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1899 unsigned long flags
;
1901 if (debug_level
>= DEBUG_LEVEL_INFO
)
1902 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1903 __FILE__
,__LINE__
, info
->device_name
);
1905 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1909 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1911 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1912 spin_lock_irqsave(&info
->lock
,flags
);
1913 info
->serial_signals
&= ~SerialSignal_RTS
;
1915 spin_unlock_irqrestore(&info
->lock
,flags
);
1919 /* Signal remote device to stop throttling send data (our receive data)
1921 static void mgslpc_unthrottle(struct tty_struct
* tty
)
1923 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1924 unsigned long flags
;
1926 if (debug_level
>= DEBUG_LEVEL_INFO
)
1927 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1928 __FILE__
,__LINE__
, info
->device_name
);
1930 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1937 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1940 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1941 spin_lock_irqsave(&info
->lock
,flags
);
1942 info
->serial_signals
|= SerialSignal_RTS
;
1944 spin_unlock_irqrestore(&info
->lock
,flags
);
1948 /* get the current serial statistics
1950 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1953 if (debug_level
>= DEBUG_LEVEL_INFO
)
1954 printk("get_params(%s)\n", info
->device_name
);
1955 COPY_TO_USER(err
,user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1961 /* get the current serial parameters
1963 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1966 if (debug_level
>= DEBUG_LEVEL_INFO
)
1967 printk("get_params(%s)\n", info
->device_name
);
1968 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1974 /* set the serial parameters
1978 * info pointer to device instance data
1979 * new_params user buffer containing new serial params
1981 * Returns: 0 if success, otherwise error code
1983 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
)
1985 unsigned long flags
;
1986 MGSL_PARAMS tmp_params
;
1989 if (debug_level
>= DEBUG_LEVEL_INFO
)
1990 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1991 info
->device_name
);
1992 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1994 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1995 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1996 __FILE__
,__LINE__
,info
->device_name
);
2000 spin_lock_irqsave(&info
->lock
,flags
);
2001 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
2002 spin_unlock_irqrestore(&info
->lock
,flags
);
2004 mgslpc_change_params(info
);
2009 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
2012 if (debug_level
>= DEBUG_LEVEL_INFO
)
2013 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
2014 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
2020 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
2022 unsigned long flags
;
2023 if (debug_level
>= DEBUG_LEVEL_INFO
)
2024 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
2025 spin_lock_irqsave(&info
->lock
,flags
);
2026 info
->idle_mode
= idle_mode
;
2028 spin_unlock_irqrestore(&info
->lock
,flags
);
2032 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
2035 if (debug_level
>= DEBUG_LEVEL_INFO
)
2036 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
2037 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
2043 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
2045 unsigned long flags
;
2047 if (debug_level
>= DEBUG_LEVEL_INFO
)
2048 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
2049 spin_lock_irqsave(&info
->lock
,flags
);
2050 info
->if_mode
= if_mode
;
2052 val
= read_reg(info
, PVR
) & 0x0f;
2053 switch (info
->if_mode
)
2055 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
2056 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
2057 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
2059 write_reg(info
, PVR
, val
);
2061 spin_unlock_irqrestore(&info
->lock
,flags
);
2065 static int set_txenable(MGSLPC_INFO
* info
, int enable
)
2067 unsigned long flags
;
2069 if (debug_level
>= DEBUG_LEVEL_INFO
)
2070 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
2072 spin_lock_irqsave(&info
->lock
,flags
);
2074 if (!info
->tx_enabled
)
2077 if (info
->tx_enabled
)
2080 spin_unlock_irqrestore(&info
->lock
,flags
);
2084 static int tx_abort(MGSLPC_INFO
* info
)
2086 unsigned long flags
;
2088 if (debug_level
>= DEBUG_LEVEL_INFO
)
2089 printk("tx_abort(%s)\n", info
->device_name
);
2091 spin_lock_irqsave(&info
->lock
,flags
);
2092 if (info
->tx_active
&& info
->tx_count
&&
2093 info
->params
.mode
== MGSL_MODE_HDLC
) {
2094 /* clear data count so FIFO is not filled on next IRQ.
2095 * This results in underrun and abort transmission.
2097 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
2098 info
->tx_aborting
= TRUE
;
2100 spin_unlock_irqrestore(&info
->lock
,flags
);
2104 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
2106 unsigned long flags
;
2108 if (debug_level
>= DEBUG_LEVEL_INFO
)
2109 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
2111 spin_lock_irqsave(&info
->lock
,flags
);
2113 if (!info
->rx_enabled
)
2116 if (info
->rx_enabled
)
2119 spin_unlock_irqrestore(&info
->lock
,flags
);
2123 /* wait for specified event to occur
2125 * Arguments: info pointer to device instance data
2126 * mask pointer to bitmask of events to wait for
2127 * Return Value: 0 if successful and bit mask updated with
2128 * of events triggerred,
2129 * otherwise error code
2131 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
2133 unsigned long flags
;
2136 struct mgsl_icount cprev
, cnow
;
2139 struct _input_signal_events oldsigs
, newsigs
;
2140 DECLARE_WAITQUEUE(wait
, current
);
2142 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
2146 if (debug_level
>= DEBUG_LEVEL_INFO
)
2147 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
2149 spin_lock_irqsave(&info
->lock
,flags
);
2151 /* return immediately if state matches requested events */
2153 s
= info
->serial_signals
;
2155 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
2156 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
2157 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
2158 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
2160 spin_unlock_irqrestore(&info
->lock
,flags
);
2164 /* save current irq counts */
2165 cprev
= info
->icount
;
2166 oldsigs
= info
->input_signal_events
;
2168 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
2169 (mask
& MgslEvent_ExitHuntMode
))
2170 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
2172 set_current_state(TASK_INTERRUPTIBLE
);
2173 add_wait_queue(&info
->event_wait_q
, &wait
);
2175 spin_unlock_irqrestore(&info
->lock
,flags
);
2180 if (signal_pending(current
)) {
2185 /* get current irq counts */
2186 spin_lock_irqsave(&info
->lock
,flags
);
2187 cnow
= info
->icount
;
2188 newsigs
= info
->input_signal_events
;
2189 set_current_state(TASK_INTERRUPTIBLE
);
2190 spin_unlock_irqrestore(&info
->lock
,flags
);
2192 /* if no change, wait aborted for some reason */
2193 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2194 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2195 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2196 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2197 newsigs
.cts_up
== oldsigs
.cts_up
&&
2198 newsigs
.cts_down
== oldsigs
.cts_down
&&
2199 newsigs
.ri_up
== oldsigs
.ri_up
&&
2200 newsigs
.ri_down
== oldsigs
.ri_down
&&
2201 cnow
.exithunt
== cprev
.exithunt
&&
2202 cnow
.rxidle
== cprev
.rxidle
) {
2208 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2209 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2210 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2211 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2212 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2213 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2214 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2215 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2216 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2217 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2225 remove_wait_queue(&info
->event_wait_q
, &wait
);
2226 set_current_state(TASK_RUNNING
);
2228 if (mask
& MgslEvent_ExitHuntMode
) {
2229 spin_lock_irqsave(&info
->lock
,flags
);
2230 if (!waitqueue_active(&info
->event_wait_q
))
2231 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2232 spin_unlock_irqrestore(&info
->lock
,flags
);
2236 PUT_USER(rc
, events
, mask_ptr
);
2240 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2242 unsigned long flags
;
2244 struct mgsl_icount cprev
, cnow
;
2245 DECLARE_WAITQUEUE(wait
, current
);
2247 /* save current irq counts */
2248 spin_lock_irqsave(&info
->lock
,flags
);
2249 cprev
= info
->icount
;
2250 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2251 set_current_state(TASK_INTERRUPTIBLE
);
2252 spin_unlock_irqrestore(&info
->lock
,flags
);
2256 if (signal_pending(current
)) {
2261 /* get new irq counts */
2262 spin_lock_irqsave(&info
->lock
,flags
);
2263 cnow
= info
->icount
;
2264 set_current_state(TASK_INTERRUPTIBLE
);
2265 spin_unlock_irqrestore(&info
->lock
,flags
);
2267 /* if no change, wait aborted for some reason */
2268 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2269 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2274 /* check for change in caller specified modem input */
2275 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2276 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2277 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2278 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2285 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2286 set_current_state(TASK_RUNNING
);
2290 /* return the state of the serial control and status signals
2292 static int tiocmget(struct tty_struct
*tty
, struct file
*file
)
2294 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2295 unsigned int result
;
2296 unsigned long flags
;
2298 spin_lock_irqsave(&info
->lock
,flags
);
2300 spin_unlock_irqrestore(&info
->lock
,flags
);
2302 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2303 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2304 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2305 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2306 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2307 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2309 if (debug_level
>= DEBUG_LEVEL_INFO
)
2310 printk("%s(%d):%s tiocmget() value=%08X\n",
2311 __FILE__
,__LINE__
, info
->device_name
, result
);
2315 /* set modem control signals (DTR/RTS)
2317 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
2318 unsigned int set
, unsigned int clear
)
2320 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2321 unsigned long flags
;
2323 if (debug_level
>= DEBUG_LEVEL_INFO
)
2324 printk("%s(%d):%s tiocmset(%x,%x)\n",
2325 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
2327 if (set
& TIOCM_RTS
)
2328 info
->serial_signals
|= SerialSignal_RTS
;
2329 if (set
& TIOCM_DTR
)
2330 info
->serial_signals
|= SerialSignal_DTR
;
2331 if (clear
& TIOCM_RTS
)
2332 info
->serial_signals
&= ~SerialSignal_RTS
;
2333 if (clear
& TIOCM_DTR
)
2334 info
->serial_signals
&= ~SerialSignal_DTR
;
2336 spin_lock_irqsave(&info
->lock
,flags
);
2338 spin_unlock_irqrestore(&info
->lock
,flags
);
2343 /* Set or clear transmit break condition
2345 * Arguments: tty pointer to tty instance data
2346 * break_state -1=set break condition, 0=clear
2348 static void mgslpc_break(struct tty_struct
*tty
, int break_state
)
2350 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2351 unsigned long flags
;
2353 if (debug_level
>= DEBUG_LEVEL_INFO
)
2354 printk("%s(%d):mgslpc_break(%s,%d)\n",
2355 __FILE__
,__LINE__
, info
->device_name
, break_state
);
2357 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2360 spin_lock_irqsave(&info
->lock
,flags
);
2361 if (break_state
== -1)
2362 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2364 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2365 spin_unlock_irqrestore(&info
->lock
,flags
);
2368 /* Service an IOCTL request
2372 * tty pointer to tty instance data
2373 * file pointer to associated file object for device
2374 * cmd IOCTL command code
2375 * arg command argument/context
2377 * Return Value: 0 if success, otherwise error code
2379 static int mgslpc_ioctl(struct tty_struct
*tty
, struct file
* file
,
2380 unsigned int cmd
, unsigned long arg
)
2382 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2384 if (debug_level
>= DEBUG_LEVEL_INFO
)
2385 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2386 info
->device_name
, cmd
);
2388 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2391 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2392 (cmd
!= TIOCMIWAIT
) && (cmd
!= TIOCGICOUNT
)) {
2393 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2397 return ioctl_common(info
, cmd
, arg
);
2400 int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
)
2403 struct mgsl_icount cnow
; /* kernel counter temps */
2404 struct serial_icounter_struct __user
*p_cuser
; /* user space */
2405 void __user
*argp
= (void __user
*)arg
;
2406 unsigned long flags
;
2409 case MGSL_IOCGPARAMS
:
2410 return get_params(info
, argp
);
2411 case MGSL_IOCSPARAMS
:
2412 return set_params(info
, argp
);
2413 case MGSL_IOCGTXIDLE
:
2414 return get_txidle(info
, argp
);
2415 case MGSL_IOCSTXIDLE
:
2416 return set_txidle(info
, (int)arg
);
2418 return get_interface(info
, argp
);
2420 return set_interface(info
,(int)arg
);
2421 case MGSL_IOCTXENABLE
:
2422 return set_txenable(info
,(int)arg
);
2423 case MGSL_IOCRXENABLE
:
2424 return set_rxenable(info
,(int)arg
);
2425 case MGSL_IOCTXABORT
:
2426 return tx_abort(info
);
2427 case MGSL_IOCGSTATS
:
2428 return get_stats(info
, argp
);
2429 case MGSL_IOCWAITEVENT
:
2430 return wait_events(info
, argp
);
2432 return modem_input_wait(info
,(int)arg
);
2434 spin_lock_irqsave(&info
->lock
,flags
);
2435 cnow
= info
->icount
;
2436 spin_unlock_irqrestore(&info
->lock
,flags
);
2438 PUT_USER(error
,cnow
.cts
, &p_cuser
->cts
);
2439 if (error
) return error
;
2440 PUT_USER(error
,cnow
.dsr
, &p_cuser
->dsr
);
2441 if (error
) return error
;
2442 PUT_USER(error
,cnow
.rng
, &p_cuser
->rng
);
2443 if (error
) return error
;
2444 PUT_USER(error
,cnow
.dcd
, &p_cuser
->dcd
);
2445 if (error
) return error
;
2446 PUT_USER(error
,cnow
.rx
, &p_cuser
->rx
);
2447 if (error
) return error
;
2448 PUT_USER(error
,cnow
.tx
, &p_cuser
->tx
);
2449 if (error
) return error
;
2450 PUT_USER(error
,cnow
.frame
, &p_cuser
->frame
);
2451 if (error
) return error
;
2452 PUT_USER(error
,cnow
.overrun
, &p_cuser
->overrun
);
2453 if (error
) return error
;
2454 PUT_USER(error
,cnow
.parity
, &p_cuser
->parity
);
2455 if (error
) return error
;
2456 PUT_USER(error
,cnow
.brk
, &p_cuser
->brk
);
2457 if (error
) return error
;
2458 PUT_USER(error
,cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
2459 if (error
) return error
;
2462 return -ENOIOCTLCMD
;
2467 /* Set new termios settings
2471 * tty pointer to tty structure
2472 * termios pointer to buffer to hold returned old termios
2474 static void mgslpc_set_termios(struct tty_struct
*tty
, struct termios
*old_termios
)
2476 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2477 unsigned long flags
;
2479 if (debug_level
>= DEBUG_LEVEL_INFO
)
2480 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2481 tty
->driver
->name
);
2483 /* just return if nothing has changed */
2484 if ((tty
->termios
->c_cflag
== old_termios
->c_cflag
)
2485 && (RELEVANT_IFLAG(tty
->termios
->c_iflag
)
2486 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2489 mgslpc_change_params(info
);
2491 /* Handle transition to B0 status */
2492 if (old_termios
->c_cflag
& CBAUD
&&
2493 !(tty
->termios
->c_cflag
& CBAUD
)) {
2494 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2495 spin_lock_irqsave(&info
->lock
,flags
);
2497 spin_unlock_irqrestore(&info
->lock
,flags
);
2500 /* Handle transition away from B0 status */
2501 if (!(old_termios
->c_cflag
& CBAUD
) &&
2502 tty
->termios
->c_cflag
& CBAUD
) {
2503 info
->serial_signals
|= SerialSignal_DTR
;
2504 if (!(tty
->termios
->c_cflag
& CRTSCTS
) ||
2505 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2506 info
->serial_signals
|= SerialSignal_RTS
;
2508 spin_lock_irqsave(&info
->lock
,flags
);
2510 spin_unlock_irqrestore(&info
->lock
,flags
);
2513 /* Handle turning off CRTSCTS */
2514 if (old_termios
->c_cflag
& CRTSCTS
&&
2515 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2516 tty
->hw_stopped
= 0;
2521 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2523 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2525 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2528 if (debug_level
>= DEBUG_LEVEL_INFO
)
2529 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2530 __FILE__
,__LINE__
, info
->device_name
, info
->count
);
2535 if (tty_hung_up_p(filp
))
2538 if ((tty
->count
== 1) && (info
->count
!= 1)) {
2540 * tty->count is 1 and the tty structure will be freed.
2541 * info->count should be one in this case.
2542 * if it's not, correct it so that the port is shutdown.
2544 printk("mgslpc_close: bad refcount; tty->count is 1, "
2545 "info->count is %d\n", info
->count
);
2551 /* if at least one open remaining, leave hardware active */
2555 info
->flags
|= ASYNC_CLOSING
;
2557 /* set tty->closing to notify line discipline to
2558 * only process XON/XOFF characters. Only the N_TTY
2559 * discipline appears to use this (ppp does not).
2563 /* wait for transmit data to clear all layers */
2565 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
) {
2566 if (debug_level
>= DEBUG_LEVEL_INFO
)
2567 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2568 __FILE__
,__LINE__
, info
->device_name
);
2569 tty_wait_until_sent(tty
, info
->closing_wait
);
2572 if (info
->flags
& ASYNC_INITIALIZED
)
2573 mgslpc_wait_until_sent(tty
, info
->timeout
);
2575 if (tty
->driver
->flush_buffer
)
2576 tty
->driver
->flush_buffer(tty
);
2578 ldisc_flush_buffer(tty
);
2585 if (info
->blocked_open
) {
2586 if (info
->close_delay
) {
2587 msleep_interruptible(jiffies_to_msecs(info
->close_delay
));
2589 wake_up_interruptible(&info
->open_wait
);
2592 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
|ASYNC_CLOSING
);
2594 wake_up_interruptible(&info
->close_wait
);
2597 if (debug_level
>= DEBUG_LEVEL_INFO
)
2598 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2599 tty
->driver
->name
, info
->count
);
2602 /* Wait until the transmitter is empty.
2604 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2606 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2607 unsigned long orig_jiffies
, char_time
;
2612 if (debug_level
>= DEBUG_LEVEL_INFO
)
2613 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2614 __FILE__
,__LINE__
, info
->device_name
);
2616 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2619 if (!(info
->flags
& ASYNC_INITIALIZED
))
2622 orig_jiffies
= jiffies
;
2624 /* Set check interval to 1/5 of estimated time to
2625 * send a character, and make it at least 1. The check
2626 * interval should also be less than the timeout.
2627 * Note: use tight timings here to satisfy the NIST-PCTS.
2630 if ( info
->params
.data_rate
) {
2631 char_time
= info
->timeout
/(32 * 5);
2638 char_time
= min_t(unsigned long, char_time
, timeout
);
2640 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2641 while (info
->tx_active
) {
2642 msleep_interruptible(jiffies_to_msecs(char_time
));
2643 if (signal_pending(current
))
2645 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2649 while ((info
->tx_count
|| info
->tx_active
) &&
2651 msleep_interruptible(jiffies_to_msecs(char_time
));
2652 if (signal_pending(current
))
2654 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2660 if (debug_level
>= DEBUG_LEVEL_INFO
)
2661 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2662 __FILE__
,__LINE__
, info
->device_name
);
2665 /* Called by tty_hangup() when a hangup is signaled.
2666 * This is the same as closing all open files for the port.
2668 static void mgslpc_hangup(struct tty_struct
*tty
)
2670 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2672 if (debug_level
>= DEBUG_LEVEL_INFO
)
2673 printk("%s(%d):mgslpc_hangup(%s)\n",
2674 __FILE__
,__LINE__
, info
->device_name
);
2676 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2679 mgslpc_flush_buffer(tty
);
2683 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2686 wake_up_interruptible(&info
->open_wait
);
2689 /* Block the current process until the specified port
2690 * is ready to be opened.
2692 static int block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
2695 DECLARE_WAITQUEUE(wait
, current
);
2697 int do_clocal
= 0, extra_count
= 0;
2698 unsigned long flags
;
2700 if (debug_level
>= DEBUG_LEVEL_INFO
)
2701 printk("%s(%d):block_til_ready on %s\n",
2702 __FILE__
,__LINE__
, tty
->driver
->name
);
2704 if (filp
->f_flags
& O_NONBLOCK
|| tty
->flags
& (1 << TTY_IO_ERROR
)){
2705 /* nonblock mode is set or port is not enabled */
2706 /* just verify that callout device is not active */
2707 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2711 if (tty
->termios
->c_cflag
& CLOCAL
)
2714 /* Wait for carrier detect and the line to become
2715 * free (i.e., not in use by the callout). While we are in
2716 * this loop, info->count is dropped by one, so that
2717 * mgslpc_close() knows when to free things. We restore it upon
2718 * exit, either normal or abnormal.
2722 add_wait_queue(&info
->open_wait
, &wait
);
2724 if (debug_level
>= DEBUG_LEVEL_INFO
)
2725 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2726 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2728 spin_lock_irqsave(&info
->lock
, flags
);
2729 if (!tty_hung_up_p(filp
)) {
2733 spin_unlock_irqrestore(&info
->lock
, flags
);
2734 info
->blocked_open
++;
2737 if ((tty
->termios
->c_cflag
& CBAUD
)) {
2738 spin_lock_irqsave(&info
->lock
,flags
);
2739 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2741 spin_unlock_irqrestore(&info
->lock
,flags
);
2744 set_current_state(TASK_INTERRUPTIBLE
);
2746 if (tty_hung_up_p(filp
) || !(info
->flags
& ASYNC_INITIALIZED
)){
2747 retval
= (info
->flags
& ASYNC_HUP_NOTIFY
) ?
2748 -EAGAIN
: -ERESTARTSYS
;
2752 spin_lock_irqsave(&info
->lock
,flags
);
2754 spin_unlock_irqrestore(&info
->lock
,flags
);
2756 if (!(info
->flags
& ASYNC_CLOSING
) &&
2757 (do_clocal
|| (info
->serial_signals
& SerialSignal_DCD
)) ) {
2761 if (signal_pending(current
)) {
2762 retval
= -ERESTARTSYS
;
2766 if (debug_level
>= DEBUG_LEVEL_INFO
)
2767 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2768 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2773 set_current_state(TASK_RUNNING
);
2774 remove_wait_queue(&info
->open_wait
, &wait
);
2778 info
->blocked_open
--;
2780 if (debug_level
>= DEBUG_LEVEL_INFO
)
2781 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2782 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2785 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2790 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2794 unsigned long flags
;
2796 /* verify range of specified line number */
2798 if ((line
< 0) || (line
>= mgslpc_device_count
)) {
2799 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2800 __FILE__
,__LINE__
,line
);
2804 /* find the info structure for the specified line */
2805 info
= mgslpc_device_list
;
2806 while(info
&& info
->line
!= line
)
2807 info
= info
->next_device
;
2808 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2811 tty
->driver_data
= info
;
2814 if (debug_level
>= DEBUG_LEVEL_INFO
)
2815 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2816 __FILE__
,__LINE__
,tty
->driver
->name
, info
->count
);
2818 /* If port is closing, signal caller to try again */
2819 if (tty_hung_up_p(filp
) || info
->flags
& ASYNC_CLOSING
){
2820 if (info
->flags
& ASYNC_CLOSING
)
2821 interruptible_sleep_on(&info
->close_wait
);
2822 retval
= ((info
->flags
& ASYNC_HUP_NOTIFY
) ?
2823 -EAGAIN
: -ERESTARTSYS
);
2827 info
->tty
->low_latency
= (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2829 spin_lock_irqsave(&info
->netlock
, flags
);
2830 if (info
->netcount
) {
2832 spin_unlock_irqrestore(&info
->netlock
, flags
);
2836 spin_unlock_irqrestore(&info
->netlock
, flags
);
2838 if (info
->count
== 1) {
2839 /* 1st open on this device, init hardware */
2840 retval
= startup(info
);
2845 retval
= block_til_ready(tty
, filp
, info
);
2847 if (debug_level
>= DEBUG_LEVEL_INFO
)
2848 printk("%s(%d):block_til_ready(%s) returned %d\n",
2849 __FILE__
,__LINE__
, info
->device_name
, retval
);
2853 if (debug_level
>= DEBUG_LEVEL_INFO
)
2854 printk("%s(%d):mgslpc_open(%s) success\n",
2855 __FILE__
,__LINE__
, info
->device_name
);
2860 if (tty
->count
== 1)
2861 info
->tty
= NULL
; /* tty layer will release tty struct */
2870 * /proc fs routines....
2873 static inline int line_info(char *buf
, MGSLPC_INFO
*info
)
2877 unsigned long flags
;
2879 ret
= sprintf(buf
, "%s:io:%04X irq:%d",
2880 info
->device_name
, info
->io_base
, info
->irq_level
);
2882 /* output current serial signal states */
2883 spin_lock_irqsave(&info
->lock
,flags
);
2885 spin_unlock_irqrestore(&info
->lock
,flags
);
2889 if (info
->serial_signals
& SerialSignal_RTS
)
2890 strcat(stat_buf
, "|RTS");
2891 if (info
->serial_signals
& SerialSignal_CTS
)
2892 strcat(stat_buf
, "|CTS");
2893 if (info
->serial_signals
& SerialSignal_DTR
)
2894 strcat(stat_buf
, "|DTR");
2895 if (info
->serial_signals
& SerialSignal_DSR
)
2896 strcat(stat_buf
, "|DSR");
2897 if (info
->serial_signals
& SerialSignal_DCD
)
2898 strcat(stat_buf
, "|CD");
2899 if (info
->serial_signals
& SerialSignal_RI
)
2900 strcat(stat_buf
, "|RI");
2902 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2903 ret
+= sprintf(buf
+ret
, " HDLC txok:%d rxok:%d",
2904 info
->icount
.txok
, info
->icount
.rxok
);
2905 if (info
->icount
.txunder
)
2906 ret
+= sprintf(buf
+ret
, " txunder:%d", info
->icount
.txunder
);
2907 if (info
->icount
.txabort
)
2908 ret
+= sprintf(buf
+ret
, " txabort:%d", info
->icount
.txabort
);
2909 if (info
->icount
.rxshort
)
2910 ret
+= sprintf(buf
+ret
, " rxshort:%d", info
->icount
.rxshort
);
2911 if (info
->icount
.rxlong
)
2912 ret
+= sprintf(buf
+ret
, " rxlong:%d", info
->icount
.rxlong
);
2913 if (info
->icount
.rxover
)
2914 ret
+= sprintf(buf
+ret
, " rxover:%d", info
->icount
.rxover
);
2915 if (info
->icount
.rxcrc
)
2916 ret
+= sprintf(buf
+ret
, " rxcrc:%d", info
->icount
.rxcrc
);
2918 ret
+= sprintf(buf
+ret
, " ASYNC tx:%d rx:%d",
2919 info
->icount
.tx
, info
->icount
.rx
);
2920 if (info
->icount
.frame
)
2921 ret
+= sprintf(buf
+ret
, " fe:%d", info
->icount
.frame
);
2922 if (info
->icount
.parity
)
2923 ret
+= sprintf(buf
+ret
, " pe:%d", info
->icount
.parity
);
2924 if (info
->icount
.brk
)
2925 ret
+= sprintf(buf
+ret
, " brk:%d", info
->icount
.brk
);
2926 if (info
->icount
.overrun
)
2927 ret
+= sprintf(buf
+ret
, " oe:%d", info
->icount
.overrun
);
2930 /* Append serial signal status to end */
2931 ret
+= sprintf(buf
+ret
, " %s\n", stat_buf
+1);
2933 ret
+= sprintf(buf
+ret
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2934 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2940 /* Called to print information about devices
2942 static int mgslpc_read_proc(char *page
, char **start
, off_t off
, int count
,
2943 int *eof
, void *data
)
2949 len
+= sprintf(page
, "synclink driver:%s\n", driver_version
);
2951 info
= mgslpc_device_list
;
2953 l
= line_info(page
+ len
, info
);
2955 if (len
+begin
> off
+count
)
2957 if (len
+begin
< off
) {
2961 info
= info
->next_device
;
2966 if (off
>= len
+begin
)
2968 *start
= page
+ (off
-begin
);
2969 return ((count
< begin
+len
-off
) ? count
: begin
+len
-off
);
2972 int rx_alloc_buffers(MGSLPC_INFO
*info
)
2974 /* each buffer has header and data */
2975 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2977 /* calculate total allocation size for 8 buffers */
2978 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2980 /* limit total allocated memory */
2981 if (info
->rx_buf_total_size
> 0x10000)
2982 info
->rx_buf_total_size
= 0x10000;
2984 /* calculate number of buffers */
2985 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2987 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2988 if (info
->rx_buf
== NULL
)
2991 rx_reset_buffers(info
);
2995 void rx_free_buffers(MGSLPC_INFO
*info
)
2998 kfree(info
->rx_buf
);
2999 info
->rx_buf
= NULL
;
3002 int claim_resources(MGSLPC_INFO
*info
)
3004 if (rx_alloc_buffers(info
) < 0 ) {
3005 printk( "Cant allocate rx buffer %s\n", info
->device_name
);
3006 release_resources(info
);
3012 void release_resources(MGSLPC_INFO
*info
)
3014 if (debug_level
>= DEBUG_LEVEL_INFO
)
3015 printk("release_resources(%s)\n", info
->device_name
);
3016 rx_free_buffers(info
);
3019 /* Add the specified device instance data structure to the
3020 * global linked list of devices and increment the device count.
3022 * Arguments: info pointer to device instance data
3024 void mgslpc_add_device(MGSLPC_INFO
*info
)
3026 info
->next_device
= NULL
;
3027 info
->line
= mgslpc_device_count
;
3028 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
3030 if (info
->line
< MAX_DEVICE_COUNT
) {
3031 if (maxframe
[info
->line
])
3032 info
->max_frame_size
= maxframe
[info
->line
];
3033 info
->dosyncppp
= dosyncppp
[info
->line
];
3036 mgslpc_device_count
++;
3038 if (!mgslpc_device_list
)
3039 mgslpc_device_list
= info
;
3041 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
3042 while( current_dev
->next_device
)
3043 current_dev
= current_dev
->next_device
;
3044 current_dev
->next_device
= info
;
3047 if (info
->max_frame_size
< 4096)
3048 info
->max_frame_size
= 4096;
3049 else if (info
->max_frame_size
> 65535)
3050 info
->max_frame_size
= 65535;
3052 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
3053 info
->device_name
, info
->io_base
, info
->irq_level
);
3060 void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
3062 MGSLPC_INFO
*info
= mgslpc_device_list
;
3063 MGSLPC_INFO
*last
= NULL
;
3066 if (info
== remove_info
) {
3068 last
->next_device
= info
->next_device
;
3070 mgslpc_device_list
= info
->next_device
;
3074 release_resources(info
);
3076 mgslpc_device_count
--;
3080 info
= info
->next_device
;
3084 static struct pcmcia_device_id mgslpc_ids
[] = {
3085 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
3088 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
3090 static struct pcmcia_driver mgslpc_driver
= {
3091 .owner
= THIS_MODULE
,
3093 .name
= "synclink_cs",
3095 .attach
= mgslpc_attach
,
3096 .detach
= mgslpc_detach
,
3097 .id_table
= mgslpc_ids
,
3100 static struct tty_operations mgslpc_ops
= {
3101 .open
= mgslpc_open
,
3102 .close
= mgslpc_close
,
3103 .write
= mgslpc_write
,
3104 .put_char
= mgslpc_put_char
,
3105 .flush_chars
= mgslpc_flush_chars
,
3106 .write_room
= mgslpc_write_room
,
3107 .chars_in_buffer
= mgslpc_chars_in_buffer
,
3108 .flush_buffer
= mgslpc_flush_buffer
,
3109 .ioctl
= mgslpc_ioctl
,
3110 .throttle
= mgslpc_throttle
,
3111 .unthrottle
= mgslpc_unthrottle
,
3112 .send_xchar
= mgslpc_send_xchar
,
3113 .break_ctl
= mgslpc_break
,
3114 .wait_until_sent
= mgslpc_wait_until_sent
,
3115 .read_proc
= mgslpc_read_proc
,
3116 .set_termios
= mgslpc_set_termios
,
3118 .start
= tx_release
,
3119 .hangup
= mgslpc_hangup
,
3120 .tiocmget
= tiocmget
,
3121 .tiocmset
= tiocmset
,
3124 static void synclink_cs_cleanup(void)
3128 printk("Unloading %s: version %s\n", driver_name
, driver_version
);
3130 while(mgslpc_device_list
)
3131 mgslpc_remove_device(mgslpc_device_list
);
3133 if (serial_driver
) {
3134 if ((rc
= tty_unregister_driver(serial_driver
)))
3135 printk("%s(%d) failed to unregister tty driver err=%d\n",
3136 __FILE__
,__LINE__
,rc
);
3137 put_tty_driver(serial_driver
);
3140 pcmcia_unregister_driver(&mgslpc_driver
);
3141 BUG_ON(dev_list
!= NULL
);
3144 static int __init
synclink_cs_init(void)
3148 if (break_on_load
) {
3149 mgslpc_get_text_ptr();
3153 printk("%s %s\n", driver_name
, driver_version
);
3155 if ((rc
= pcmcia_register_driver(&mgslpc_driver
)) < 0)
3158 serial_driver
= alloc_tty_driver(MAX_DEVICE_COUNT
);
3159 if (!serial_driver
) {
3164 /* Initialize the tty_driver structure */
3166 serial_driver
->owner
= THIS_MODULE
;
3167 serial_driver
->driver_name
= "synclink_cs";
3168 serial_driver
->name
= "ttySLP";
3169 serial_driver
->major
= ttymajor
;
3170 serial_driver
->minor_start
= 64;
3171 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
3172 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
3173 serial_driver
->init_termios
= tty_std_termios
;
3174 serial_driver
->init_termios
.c_cflag
=
3175 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
3176 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
3177 tty_set_operations(serial_driver
, &mgslpc_ops
);
3179 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
3180 printk("%s(%d):Couldn't register serial driver\n",
3182 put_tty_driver(serial_driver
);
3183 serial_driver
= NULL
;
3187 printk("%s %s, tty major#%d\n",
3188 driver_name
, driver_version
,
3189 serial_driver
->major
);
3194 synclink_cs_cleanup();
3198 static void __exit
synclink_cs_exit(void)
3200 synclink_cs_cleanup();
3203 module_init(synclink_cs_init
);
3204 module_exit(synclink_cs_exit
);
3206 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
3211 /* note:standard BRG mode is broken in V3.2 chip
3212 * so enhanced mode is always used
3220 for (M
= 1; N
> 64 && M
< 16; M
++)
3226 * BGR[7..0] contained in BGR register
3227 * BGR[9..8] contained in CCR2[7..6]
3228 * divisor = (N+1)*2^M
3230 * Note: M *must* not be zero (causes asymetric duty cycle)
3232 write_reg(info
, (unsigned char) (channel
+ BGR
),
3233 (unsigned char) ((M
<< 6) + N
));
3234 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
3235 val
|= ((M
<< 4) & 0xc0);
3236 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
3240 /* Enabled the AUX clock output at the specified frequency.
3242 static void enable_auxclk(MGSLPC_INFO
*info
)
3248 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3249 * 05 ADM Address Mode, 0 = no addr recognition
3250 * 04 TMD Timer Mode, 0 = external
3251 * 03 RAC Receiver Active, 0 = inactive
3252 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3253 * 01 TRS Timer Resolution, 1=512
3254 * 00 TLP Test Loop, 0 = no loop
3260 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3261 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3263 write_reg(info
, CHB
+ MODE
, val
);
3267 * 07 PU Power Up, 1=active, 0=power down
3268 * 06 MCE Master Clock Enable, 1=enabled
3270 * 04..02 SC[2..0] Encoding
3271 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3275 write_reg(info
, CHB
+ CCR0
, 0xc0);
3279 * 07 SFLG Shared Flag, 0 = disable shared flags
3280 * 06 GALP Go Active On Loop, 0 = not used
3281 * 05 GLP Go On Loop, 0 = not used
3282 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3283 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3284 * 02..00 CM[2..0] Clock Mode
3288 write_reg(info
, CHB
+ CCR1
, 0x17);
3292 * 07..06 BGR[9..8] Baud rate bits 9..8
3293 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3294 * 04 SSEL Clock source select, 1=submode b
3295 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3296 * 02 RWX Read/Write Exchange 0=disabled
3297 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3298 * 00 DIV, data inversion 0=disabled, 1=enabled
3302 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3303 write_reg(info
, CHB
+ CCR2
, 0x38);
3305 write_reg(info
, CHB
+ CCR2
, 0x30);
3309 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3310 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3311 * 05 TST1 Test Pin, 0=normal operation
3312 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3313 * 03..02 Reserved, must be 0
3314 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3318 write_reg(info
, CHB
+ CCR4
, 0x50);
3320 /* if auxclk not enabled, set internal BRG so
3321 * CTS transitions can be detected (requires TxC)
3323 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3324 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
3326 mgslpc_set_rate(info
, CHB
, 921600);
3329 static void loopback_enable(MGSLPC_INFO
*info
)
3333 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3334 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
3335 write_reg(info
, CHA
+ CCR1
, val
);
3337 /* CCR2:04 SSEL Clock source select, 1=submode b */
3338 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3339 write_reg(info
, CHA
+ CCR2
, val
);
3341 /* set LinkSpeed if available, otherwise default to 2Mbps */
3342 if (info
->params
.clock_speed
)
3343 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3345 mgslpc_set_rate(info
, CHA
, 1843200);
3347 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3348 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3349 write_reg(info
, CHA
+ MODE
, val
);
3352 void hdlc_mode(MGSLPC_INFO
*info
)
3355 unsigned char clkmode
, clksubmode
;
3357 /* disable all interrupts */
3358 irq_disable(info
, CHA
, 0xffff);
3359 irq_disable(info
, CHB
, 0xffff);
3360 port_irq_disable(info
, 0xff);
3362 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3363 clkmode
= clksubmode
= 0;
3364 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3365 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3366 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3368 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3369 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3370 /* clock mode 7b, rcv = BRG, xmt = BRG */
3373 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3374 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3375 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3379 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3382 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3383 /* clock mode 0b, rcv = RxC, xmt = BRG */
3389 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3390 * 05 ADM Address Mode, 0 = no addr recognition
3391 * 04 TMD Timer Mode, 0 = external
3392 * 03 RAC Receiver Active, 0 = inactive
3393 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3394 * 01 TRS Timer Resolution, 1=512
3395 * 00 TLP Test Loop, 0 = no loop
3400 if (info
->params
.loopback
)
3403 /* preserve RTS state */
3404 if (info
->serial_signals
& SerialSignal_RTS
)
3406 write_reg(info
, CHA
+ MODE
, val
);
3410 * 07 PU Power Up, 1=active, 0=power down
3411 * 06 MCE Master Clock Enable, 1=enabled
3413 * 04..02 SC[2..0] Encoding
3414 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3419 switch (info
->params
.encoding
)
3421 case HDLC_ENCODING_NRZI
:
3424 case HDLC_ENCODING_BIPHASE_SPACE
:
3427 case HDLC_ENCODING_BIPHASE_MARK
:
3430 case HDLC_ENCODING_BIPHASE_LEVEL
:
3432 break; // Manchester
3434 write_reg(info
, CHA
+ CCR0
, val
);
3438 * 07 SFLG Shared Flag, 0 = disable shared flags
3439 * 06 GALP Go Active On Loop, 0 = not used
3440 * 05 GLP Go On Loop, 0 = not used
3441 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3442 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3443 * 02..00 CM[2..0] Clock Mode
3447 val
= 0x10 + clkmode
;
3448 write_reg(info
, CHA
+ CCR1
, val
);
3452 * 07..06 BGR[9..8] Baud rate bits 9..8
3453 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3454 * 04 SSEL Clock source select, 1=submode b
3455 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3456 * 02 RWX Read/Write Exchange 0=disabled
3457 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3458 * 00 DIV, data inversion 0=disabled, 1=enabled
3463 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3464 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3468 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3470 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3472 write_reg(info
, CHA
+ CCR2
, val
);
3476 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3477 * 05 EPT Enable preamble transmission, 1=enabled
3478 * 04 RADD Receive address pushed to FIFO, 0=disabled
3479 * 03 CRL CRC Reset Level, 0=FFFF
3480 * 02 RCRC Rx CRC 0=On 1=Off
3481 * 01 TCRC Tx CRC 0=On 1=Off
3482 * 00 PSD DPLL Phase Shift Disable
3487 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3489 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3491 switch (info
->params
.preamble_length
)
3493 case HDLC_PREAMBLE_LENGTH_16BITS
:
3496 case HDLC_PREAMBLE_LENGTH_32BITS
:
3499 case HDLC_PREAMBLE_LENGTH_64BITS
:
3503 write_reg(info
, CHA
+ CCR3
, val
);
3505 /* PRE - Preamble pattern */
3507 switch (info
->params
.preamble
)
3509 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3510 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3511 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3512 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3514 write_reg(info
, CHA
+ PRE
, val
);
3518 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3519 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3520 * 05 TST1 Test Pin, 0=normal operation
3521 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3522 * 03..02 Reserved, must be 0
3523 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3528 write_reg(info
, CHA
+ CCR4
, val
);
3529 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3530 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3532 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3534 /* RLCR Receive length check register
3536 * 7 1=enable receive length check
3537 * 6..0 Max frame length = (RL + 1) * 32
3539 write_reg(info
, CHA
+ RLCR
, 0);
3541 /* XBCH Transmit Byte Count High
3543 * 07 DMA mode, 0 = interrupt driven
3544 * 06 NRM, 0=ABM (ignored)
3545 * 05 CAS Carrier Auto Start
3546 * 04 XC Transmit Continuously (ignored)
3547 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3552 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3554 write_reg(info
, CHA
+ XBCH
, val
);
3555 enable_auxclk(info
);
3556 if (info
->params
.loopback
|| info
->testing_irq
)
3557 loopback_enable(info
);
3558 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3560 irq_enable(info
, CHB
, IRQ_CTS
);
3561 /* PVR[3] 1=AUTO CTS active */
3562 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3564 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3566 irq_enable(info
, CHA
,
3567 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3568 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3569 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3570 wait_command_complete(info
, CHA
);
3571 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3573 /* Master clock mode enabled above to allow reset commands
3574 * to complete even if no data clocks are present.
3576 * Disable master clock mode for normal communications because
3577 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3578 * IRQ when in master clock mode.
3580 * Leave master clock mode enabled for IRQ test because the
3581 * timer IRQ used by the test can only happen in master clock mode.
3583 if (!info
->testing_irq
)
3584 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3592 void rx_stop(MGSLPC_INFO
*info
)
3594 if (debug_level
>= DEBUG_LEVEL_ISR
)
3595 printk("%s(%d):rx_stop(%s)\n",
3596 __FILE__
,__LINE__
, info
->device_name
);
3598 /* MODE:03 RAC Receiver Active, 0=inactive */
3599 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3601 info
->rx_enabled
= 0;
3602 info
->rx_overflow
= 0;
3605 void rx_start(MGSLPC_INFO
*info
)
3607 if (debug_level
>= DEBUG_LEVEL_ISR
)
3608 printk("%s(%d):rx_start(%s)\n",
3609 __FILE__
,__LINE__
, info
->device_name
);
3611 rx_reset_buffers(info
);
3612 info
->rx_enabled
= 0;
3613 info
->rx_overflow
= 0;
3615 /* MODE:03 RAC Receiver Active, 1=active */
3616 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3618 info
->rx_enabled
= 1;
3621 void tx_start(MGSLPC_INFO
*info
)
3623 if (debug_level
>= DEBUG_LEVEL_ISR
)
3624 printk("%s(%d):tx_start(%s)\n",
3625 __FILE__
,__LINE__
, info
->device_name
);
3627 if (info
->tx_count
) {
3628 /* If auto RTS enabled and RTS is inactive, then assert */
3629 /* RTS and set a flag indicating that the driver should */
3630 /* negate RTS when the transmission completes. */
3631 info
->drop_rts_on_tx_done
= 0;
3633 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3635 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3636 info
->serial_signals
|= SerialSignal_RTS
;
3638 info
->drop_rts_on_tx_done
= 1;
3642 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3643 if (!info
->tx_active
) {
3644 info
->tx_active
= 1;
3648 info
->tx_active
= 1;
3650 info
->tx_timer
.expires
= jiffies
+ msecs_to_jiffies(5000);
3651 add_timer(&info
->tx_timer
);
3655 if (!info
->tx_enabled
)
3656 info
->tx_enabled
= 1;
3659 void tx_stop(MGSLPC_INFO
*info
)
3661 if (debug_level
>= DEBUG_LEVEL_ISR
)
3662 printk("%s(%d):tx_stop(%s)\n",
3663 __FILE__
,__LINE__
, info
->device_name
);
3665 del_timer(&info
->tx_timer
);
3667 info
->tx_enabled
= 0;
3668 info
->tx_active
= 0;
3671 /* Reset the adapter to a known state and prepare it for further use.
3673 void reset_device(MGSLPC_INFO
*info
)
3675 /* power up both channels (set BIT7) */
3676 write_reg(info
, CHA
+ CCR0
, 0x80);
3677 write_reg(info
, CHB
+ CCR0
, 0x80);
3678 write_reg(info
, CHA
+ MODE
, 0);
3679 write_reg(info
, CHB
+ MODE
, 0);
3681 /* disable all interrupts */
3682 irq_disable(info
, CHA
, 0xffff);
3683 irq_disable(info
, CHB
, 0xffff);
3684 port_irq_disable(info
, 0xff);
3686 /* PCR Port Configuration Register
3688 * 07..04 DEC[3..0] Serial I/F select outputs
3689 * 03 output, 1=AUTO CTS control enabled
3690 * 02 RI Ring Indicator input 0=active
3691 * 01 DSR input 0=active
3692 * 00 DTR output 0=active
3696 write_reg(info
, PCR
, 0x06);
3698 /* PVR Port Value Register
3700 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3701 * 03 AUTO CTS output 1=enabled
3702 * 02 RI Ring Indicator input
3704 * 00 DTR output (1=inactive)
3708 // write_reg(info, PVR, PVR_DTR);
3710 /* IPC Interrupt Port Configuration
3712 * 07 VIS 1=Masked interrupts visible
3713 * 06..05 Reserved, 0
3714 * 04..03 SLA Slave address, 00 ignored
3715 * 02 CASM Cascading Mode, 1=daisy chain
3716 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3720 write_reg(info
, IPC
, 0x05);
3723 void async_mode(MGSLPC_INFO
*info
)
3727 /* disable all interrupts */
3728 irq_disable(info
, CHA
, 0xffff);
3729 irq_disable(info
, CHB
, 0xffff);
3730 port_irq_disable(info
, 0xff);
3735 * 06 FRTS RTS State, 0=active
3736 * 05 FCTS Flow Control on CTS
3737 * 04 FLON Flow Control Enable
3738 * 03 RAC Receiver Active, 0 = inactive
3739 * 02 RTS 0=Auto RTS, 1=manual RTS
3740 * 01 TRS Timer Resolution, 1=512
3741 * 00 TLP Test Loop, 0 = no loop
3746 if (info
->params
.loopback
)
3749 /* preserve RTS state */
3750 if (!(info
->serial_signals
& SerialSignal_RTS
))
3752 write_reg(info
, CHA
+ MODE
, val
);
3756 * 07 PU Power Up, 1=active, 0=power down
3757 * 06 MCE Master Clock Enable, 1=enabled
3759 * 04..02 SC[2..0] Encoding, 000=NRZ
3760 * 01..00 SM[1..0] Serial Mode, 11=Async
3764 write_reg(info
, CHA
+ CCR0
, 0x83);
3768 * 07..05 Reserved, 0
3769 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3770 * 03 BCR Bit Clock Rate, 1=16x
3771 * 02..00 CM[2..0] Clock Mode, 111=BRG
3775 write_reg(info
, CHA
+ CCR1
, 0x1f);
3779 * 07..06 BGR[9..8] Baud rate bits 9..8
3780 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3781 * 04 SSEL Clock source select, 1=submode b
3782 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3783 * 02 RWX Read/Write Exchange 0=disabled
3785 * 00 DIV, data inversion 0=disabled, 1=enabled
3789 write_reg(info
, CHA
+ CCR2
, 0x10);
3793 * 07..01 Reserved, 0
3794 * 00 PSD DPLL Phase Shift Disable
3798 write_reg(info
, CHA
+ CCR3
, 0);
3802 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3803 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3804 * 05 TST1 Test Pin, 0=normal operation
3805 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3806 * 03..00 Reserved, must be 0
3810 write_reg(info
, CHA
+ CCR4
, 0x50);
3811 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3816 * 06 XBRK transmit break, 0=normal operation
3817 * 05 Stop bits (0=1, 1=2)
3818 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3819 * 02 PAREN Parity Enable
3820 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3824 if (info
->params
.data_bits
!= 8)
3825 val
|= BIT0
; /* 7 bits */
3826 if (info
->params
.stop_bits
!= 1)
3828 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3830 val
|= BIT2
; /* Parity enable */
3831 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3836 write_reg(info
, CHA
+ DAFO
, val
);
3838 /* RFC Rx FIFO Control
3841 * 06 DPS, 1=parity bit not stored in data byte
3842 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3843 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3844 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3846 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3850 write_reg(info
, CHA
+ RFC
, 0x5c);
3852 /* RLCR Receive length check register
3854 * Max frame length = (RL + 1) * 32
3856 write_reg(info
, CHA
+ RLCR
, 0);
3858 /* XBCH Transmit Byte Count High
3860 * 07 DMA mode, 0 = interrupt driven
3861 * 06 NRM, 0=ABM (ignored)
3862 * 05 CAS Carrier Auto Start
3863 * 04 XC Transmit Continuously (ignored)
3864 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3869 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3871 write_reg(info
, CHA
+ XBCH
, val
);
3872 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3873 irq_enable(info
, CHA
, IRQ_CTS
);
3875 /* MODE:03 RAC Receiver Active, 1=active */
3876 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3877 enable_auxclk(info
);
3878 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3879 irq_enable(info
, CHB
, IRQ_CTS
);
3880 /* PVR[3] 1=AUTO CTS active */
3881 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3883 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3884 irq_enable(info
, CHA
,
3885 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3886 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3887 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3888 wait_command_complete(info
, CHA
);
3889 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3892 /* Set the HDLC idle mode for the transmitter.
3894 void tx_set_idle(MGSLPC_INFO
*info
)
3896 /* Note: ESCC2 only supports flags and one idle modes */
3897 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3898 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3900 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3903 /* get state of the V24 status (input) signals.
3905 void get_signals(MGSLPC_INFO
*info
)
3907 unsigned char status
= 0;
3909 /* preserve DTR and RTS */
3910 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3912 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3913 info
->serial_signals
|= SerialSignal_DCD
;
3914 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3915 info
->serial_signals
|= SerialSignal_CTS
;
3917 status
= read_reg(info
, CHA
+ PVR
);
3918 if (!(status
& PVR_RI
))
3919 info
->serial_signals
|= SerialSignal_RI
;
3920 if (!(status
& PVR_DSR
))
3921 info
->serial_signals
|= SerialSignal_DSR
;
3924 /* Set the state of DTR and RTS based on contents of
3925 * serial_signals member of device extension.
3927 void set_signals(MGSLPC_INFO
*info
)
3931 val
= read_reg(info
, CHA
+ MODE
);
3932 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3933 if (info
->serial_signals
& SerialSignal_RTS
)
3938 if (info
->serial_signals
& SerialSignal_RTS
)
3943 write_reg(info
, CHA
+ MODE
, val
);
3945 if (info
->serial_signals
& SerialSignal_DTR
)
3946 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3948 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3951 void rx_reset_buffers(MGSLPC_INFO
*info
)
3958 info
->rx_frame_count
= 0;
3959 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3960 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3961 buf
->status
= buf
->count
= 0;
3965 /* Attempt to return a received HDLC frame
3966 * Only frames received without errors are returned.
3968 * Returns 1 if frame returned, otherwise 0
3970 int rx_get_frame(MGSLPC_INFO
*info
)
3972 unsigned short status
;
3974 unsigned int framesize
= 0;
3975 unsigned long flags
;
3976 struct tty_struct
*tty
= info
->tty
;
3977 int return_frame
= 0;
3979 if (info
->rx_frame_count
== 0)
3982 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3984 status
= buf
->status
;
3986 /* 07 VFR 1=valid frame
3987 * 06 RDO 1=data overrun
3988 * 05 CRC 1=OK, 0=error
3989 * 04 RAB 1=frame aborted
3991 if ((status
& 0xf0) != 0xA0) {
3992 if (!(status
& BIT7
) || (status
& BIT4
))
3993 info
->icount
.rxabort
++;
3994 else if (status
& BIT6
)
3995 info
->icount
.rxover
++;
3996 else if (!(status
& BIT5
)) {
3997 info
->icount
.rxcrc
++;
3998 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
4004 struct net_device_stats
*stats
= hdlc_stats(info
->netdev
);
4006 stats
->rx_frame_errors
++;
4013 framesize
= buf
->count
;
4015 if (debug_level
>= DEBUG_LEVEL_BH
)
4016 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
4017 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
4019 if (debug_level
>= DEBUG_LEVEL_DATA
)
4020 trace_block(info
, buf
->data
, framesize
, 0);
4023 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
4024 framesize
+1 > info
->max_frame_size
) ||
4025 framesize
> info
->max_frame_size
)
4026 info
->icount
.rxlong
++;
4029 info
->icount
.rxok
++;
4031 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
4032 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
4038 hdlcdev_rx(info
, buf
->data
, framesize
);
4041 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
4045 spin_lock_irqsave(&info
->lock
,flags
);
4046 buf
->status
= buf
->count
= 0;
4047 info
->rx_frame_count
--;
4049 if (info
->rx_get
>= info
->rx_buf_count
)
4051 spin_unlock_irqrestore(&info
->lock
,flags
);
4056 BOOLEAN
register_test(MGSLPC_INFO
*info
)
4058 static unsigned char patterns
[] =
4059 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
4060 static unsigned int count
= sizeof(patterns
) / sizeof(patterns
[0]);
4063 unsigned long flags
;
4065 spin_lock_irqsave(&info
->lock
,flags
);
4068 for (i
= 0; i
< count
; i
++) {
4069 write_reg(info
, XAD1
, patterns
[i
]);
4070 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
4071 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
4072 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
4078 spin_unlock_irqrestore(&info
->lock
,flags
);
4082 BOOLEAN
irq_test(MGSLPC_INFO
*info
)
4084 unsigned long end_time
;
4085 unsigned long flags
;
4087 spin_lock_irqsave(&info
->lock
,flags
);
4090 info
->testing_irq
= TRUE
;
4093 info
->irq_occurred
= FALSE
;
4095 /* init hdlc mode */
4097 irq_enable(info
, CHA
, IRQ_TIMER
);
4098 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
4099 issue_command(info
, CHA
, CMD_START_TIMER
);
4101 spin_unlock_irqrestore(&info
->lock
,flags
);
4104 while(end_time
-- && !info
->irq_occurred
) {
4105 msleep_interruptible(10);
4108 info
->testing_irq
= FALSE
;
4110 spin_lock_irqsave(&info
->lock
,flags
);
4112 spin_unlock_irqrestore(&info
->lock
,flags
);
4114 return info
->irq_occurred
? TRUE
: FALSE
;
4117 int adapter_test(MGSLPC_INFO
*info
)
4119 if (!register_test(info
)) {
4120 info
->init_error
= DiagStatus_AddressFailure
;
4121 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4122 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
4126 if (!irq_test(info
)) {
4127 info
->init_error
= DiagStatus_IrqFailure
;
4128 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4129 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
4133 if (debug_level
>= DEBUG_LEVEL_INFO
)
4134 printk("%s(%d):device %s passed diagnostics\n",
4135 __FILE__
,__LINE__
,info
->device_name
);
4139 void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
4144 printk("%s tx data:\n",info
->device_name
);
4146 printk("%s rx data:\n",info
->device_name
);
4154 for(i
=0;i
<linecount
;i
++)
4155 printk("%02X ",(unsigned char)data
[i
]);
4158 for(i
=0;i
<linecount
;i
++) {
4159 if (data
[i
]>=040 && data
[i
]<=0176)
4160 printk("%c",data
[i
]);
4171 /* HDLC frame time out
4172 * update stats and do tx completion processing
4174 void tx_timeout(unsigned long context
)
4176 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
4177 unsigned long flags
;
4179 if ( debug_level
>= DEBUG_LEVEL_INFO
)
4180 printk( "%s(%d):tx_timeout(%s)\n",
4181 __FILE__
,__LINE__
,info
->device_name
);
4182 if(info
->tx_active
&&
4183 info
->params
.mode
== MGSL_MODE_HDLC
) {
4184 info
->icount
.txtimeout
++;
4186 spin_lock_irqsave(&info
->lock
,flags
);
4187 info
->tx_active
= 0;
4188 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
4190 spin_unlock_irqrestore(&info
->lock
,flags
);
4194 hdlcdev_tx_done(info
);
4203 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4204 * set encoding and frame check sequence (FCS) options
4206 * dev pointer to network device structure
4207 * encoding serial encoding setting
4208 * parity FCS setting
4210 * returns 0 if success, otherwise error code
4212 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
4213 unsigned short parity
)
4215 MGSLPC_INFO
*info
= dev_to_port(dev
);
4216 unsigned char new_encoding
;
4217 unsigned short new_crctype
;
4219 /* return error if TTY interface open */
4225 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
4226 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
4227 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
4228 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
4229 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
4230 default: return -EINVAL
;
4235 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
4236 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
4237 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
4238 default: return -EINVAL
;
4241 info
->params
.encoding
= new_encoding
;
4242 info
->params
.crc_type
= new_crctype
;;
4244 /* if network interface up, reprogram hardware */
4246 mgslpc_program_hw(info
);
4252 * called by generic HDLC layer to send frame
4254 * skb socket buffer containing HDLC frame
4255 * dev pointer to network device structure
4257 * returns 0 if success, otherwise error code
4259 static int hdlcdev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4261 MGSLPC_INFO
*info
= dev_to_port(dev
);
4262 struct net_device_stats
*stats
= hdlc_stats(dev
);
4263 unsigned long flags
;
4265 if (debug_level
>= DEBUG_LEVEL_INFO
)
4266 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
4268 /* stop sending until this frame completes */
4269 netif_stop_queue(dev
);
4271 /* copy data to device buffers */
4272 memcpy(info
->tx_buf
, skb
->data
, skb
->len
);
4274 info
->tx_put
= info
->tx_count
= skb
->len
;
4276 /* update network statistics */
4277 stats
->tx_packets
++;
4278 stats
->tx_bytes
+= skb
->len
;
4280 /* done with socket buffer, so free it */
4283 /* save start time for transmit timeout detection */
4284 dev
->trans_start
= jiffies
;
4286 /* start hardware transmitter if necessary */
4287 spin_lock_irqsave(&info
->lock
,flags
);
4288 if (!info
->tx_active
)
4290 spin_unlock_irqrestore(&info
->lock
,flags
);
4296 * called by network layer when interface enabled
4297 * claim resources and initialize hardware
4299 * dev pointer to network device structure
4301 * returns 0 if success, otherwise error code
4303 static int hdlcdev_open(struct net_device
*dev
)
4305 MGSLPC_INFO
*info
= dev_to_port(dev
);
4307 unsigned long flags
;
4309 if (debug_level
>= DEBUG_LEVEL_INFO
)
4310 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
4312 /* generic HDLC layer open processing */
4313 if ((rc
= hdlc_open(dev
)))
4316 /* arbitrate between network and tty opens */
4317 spin_lock_irqsave(&info
->netlock
, flags
);
4318 if (info
->count
!= 0 || info
->netcount
!= 0) {
4319 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
4320 spin_unlock_irqrestore(&info
->netlock
, flags
);
4324 spin_unlock_irqrestore(&info
->netlock
, flags
);
4326 /* claim resources and init adapter */
4327 if ((rc
= startup(info
)) != 0) {
4328 spin_lock_irqsave(&info
->netlock
, flags
);
4330 spin_unlock_irqrestore(&info
->netlock
, flags
);
4334 /* assert DTR and RTS, apply hardware settings */
4335 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4336 mgslpc_program_hw(info
);
4338 /* enable network layer transmit */
4339 dev
->trans_start
= jiffies
;
4340 netif_start_queue(dev
);
4342 /* inform generic HDLC layer of current DCD status */
4343 spin_lock_irqsave(&info
->lock
, flags
);
4345 spin_unlock_irqrestore(&info
->lock
, flags
);
4346 hdlc_set_carrier(info
->serial_signals
& SerialSignal_DCD
, dev
);
4352 * called by network layer when interface is disabled
4353 * shutdown hardware and release resources
4355 * dev pointer to network device structure
4357 * returns 0 if success, otherwise error code
4359 static int hdlcdev_close(struct net_device
*dev
)
4361 MGSLPC_INFO
*info
= dev_to_port(dev
);
4362 unsigned long flags
;
4364 if (debug_level
>= DEBUG_LEVEL_INFO
)
4365 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4367 netif_stop_queue(dev
);
4369 /* shutdown adapter and release resources */
4374 spin_lock_irqsave(&info
->netlock
, flags
);
4376 spin_unlock_irqrestore(&info
->netlock
, flags
);
4382 * called by network layer to process IOCTL call to network device
4384 * dev pointer to network device structure
4385 * ifr pointer to network interface request structure
4386 * cmd IOCTL command code
4388 * returns 0 if success, otherwise error code
4390 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4392 const size_t size
= sizeof(sync_serial_settings
);
4393 sync_serial_settings new_line
;
4394 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4395 MGSLPC_INFO
*info
= dev_to_port(dev
);
4398 if (debug_level
>= DEBUG_LEVEL_INFO
)
4399 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4401 /* return error if TTY interface open */
4405 if (cmd
!= SIOCWANDEV
)
4406 return hdlc_ioctl(dev
, ifr
, cmd
);
4408 switch(ifr
->ifr_settings
.type
) {
4409 case IF_GET_IFACE
: /* return current sync_serial_settings */
4411 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4412 if (ifr
->ifr_settings
.size
< size
) {
4413 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4417 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4418 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4419 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4420 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4423 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4424 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4425 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4426 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4427 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4430 new_line
.clock_rate
= info
->params
.clock_speed
;
4431 new_line
.loopback
= info
->params
.loopback
? 1:0;
4433 if (copy_to_user(line
, &new_line
, size
))
4437 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4439 if(!capable(CAP_NET_ADMIN
))
4441 if (copy_from_user(&new_line
, line
, size
))
4444 switch (new_line
.clock_type
)
4446 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4447 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4448 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4449 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4450 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4451 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4452 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4453 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4454 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4455 default: return -EINVAL
;
4458 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4461 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4462 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4463 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4464 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4465 info
->params
.flags
|= flags
;
4467 info
->params
.loopback
= new_line
.loopback
;
4469 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4470 info
->params
.clock_speed
= new_line
.clock_rate
;
4472 info
->params
.clock_speed
= 0;
4474 /* if network interface up, reprogram hardware */
4476 mgslpc_program_hw(info
);
4480 return hdlc_ioctl(dev
, ifr
, cmd
);
4485 * called by network layer when transmit timeout is detected
4487 * dev pointer to network device structure
4489 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4491 MGSLPC_INFO
*info
= dev_to_port(dev
);
4492 struct net_device_stats
*stats
= hdlc_stats(dev
);
4493 unsigned long flags
;
4495 if (debug_level
>= DEBUG_LEVEL_INFO
)
4496 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4499 stats
->tx_aborted_errors
++;
4501 spin_lock_irqsave(&info
->lock
,flags
);
4503 spin_unlock_irqrestore(&info
->lock
,flags
);
4505 netif_wake_queue(dev
);
4509 * called by device driver when transmit completes
4510 * reenable network layer transmit if stopped
4512 * info pointer to device instance information
4514 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4516 if (netif_queue_stopped(info
->netdev
))
4517 netif_wake_queue(info
->netdev
);
4521 * called by device driver when frame received
4522 * pass frame to network layer
4524 * info pointer to device instance information
4525 * buf pointer to buffer contianing frame data
4526 * size count of data bytes in buf
4528 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4530 struct sk_buff
*skb
= dev_alloc_skb(size
);
4531 struct net_device
*dev
= info
->netdev
;
4532 struct net_device_stats
*stats
= hdlc_stats(dev
);
4534 if (debug_level
>= DEBUG_LEVEL_INFO
)
4535 printk("hdlcdev_rx(%s)\n",dev
->name
);
4538 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4539 stats
->rx_dropped
++;
4543 memcpy(skb_put(skb
, size
),buf
,size
);
4545 skb
->protocol
= hdlc_type_trans(skb
, info
->netdev
);
4547 stats
->rx_packets
++;
4548 stats
->rx_bytes
+= size
;
4552 info
->netdev
->last_rx
= jiffies
;
4556 * called by device driver when adding device instance
4557 * do generic HDLC initialization
4559 * info pointer to device instance information
4561 * returns 0 if success, otherwise error code
4563 static int hdlcdev_init(MGSLPC_INFO
*info
)
4566 struct net_device
*dev
;
4569 /* allocate and initialize network and HDLC layer objects */
4571 if (!(dev
= alloc_hdlcdev(info
))) {
4572 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4576 /* for network layer reporting purposes only */
4577 dev
->base_addr
= info
->io_base
;
4578 dev
->irq
= info
->irq_level
;
4580 /* network layer callbacks and settings */
4581 dev
->do_ioctl
= hdlcdev_ioctl
;
4582 dev
->open
= hdlcdev_open
;
4583 dev
->stop
= hdlcdev_close
;
4584 dev
->tx_timeout
= hdlcdev_tx_timeout
;
4585 dev
->watchdog_timeo
= 10*HZ
;
4586 dev
->tx_queue_len
= 50;
4588 /* generic HDLC layer callbacks and settings */
4589 hdlc
= dev_to_hdlc(dev
);
4590 hdlc
->attach
= hdlcdev_attach
;
4591 hdlc
->xmit
= hdlcdev_xmit
;
4593 /* register objects with HDLC layer */
4594 if ((rc
= register_hdlc_device(dev
))) {
4595 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4605 * called by device driver when removing device instance
4606 * do generic HDLC cleanup
4608 * info pointer to device instance information
4610 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4612 unregister_hdlc_device(info
->netdev
);
4613 free_netdev(info
->netdev
);
4614 info
->netdev
= NULL
;
4617 #endif /* CONFIG_HDLC */