2 * spcp8x5 USB to serial adaptor driver
4 * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
5 * Copyright (C) 2006 S1 Corp.
7 * Original driver for 2.6.10 pl2303 driver by
8 * Greg Kroah-Hartman (greg@kroah.com)
9 * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/slab.h>
22 #include <linux/tty.h>
23 #include <linux/tty_driver.h>
24 #include <linux/tty_flip.h>
25 #include <linux/module.h>
26 #include <linux/spinlock.h>
27 #include <linux/usb.h>
28 #include <linux/usb/serial.h>
31 /* Version Information */
32 #define DRIVER_VERSION "v0.04"
33 #define DRIVER_DESC "SPCP8x5 USB to serial adaptor driver"
37 #define SPCP8x5_007_VID 0x04FC
38 #define SPCP8x5_007_PID 0x0201
39 #define SPCP8x5_008_VID 0x04fc
40 #define SPCP8x5_008_PID 0x0235
41 #define SPCP8x5_PHILIPS_VID 0x0471
42 #define SPCP8x5_PHILIPS_PID 0x081e
43 #define SPCP8x5_INTERMATIC_VID 0x04FC
44 #define SPCP8x5_INTERMATIC_PID 0x0204
45 #define SPCP8x5_835_VID 0x04fc
46 #define SPCP8x5_835_PID 0x0231
48 static struct usb_device_id id_table
[] = {
49 { USB_DEVICE(SPCP8x5_PHILIPS_VID
, SPCP8x5_PHILIPS_PID
)},
50 { USB_DEVICE(SPCP8x5_INTERMATIC_VID
, SPCP8x5_INTERMATIC_PID
)},
51 { USB_DEVICE(SPCP8x5_835_VID
, SPCP8x5_835_PID
)},
52 { USB_DEVICE(SPCP8x5_008_VID
, SPCP8x5_008_PID
)},
53 { USB_DEVICE(SPCP8x5_007_VID
, SPCP8x5_007_PID
)},
54 { } /* Terminating entry */
56 MODULE_DEVICE_TABLE(usb
, id_table
);
58 struct spcp8x5_usb_ctrl_arg
{
67 /* wait 30s before close */
68 #define SPCP8x5_CLOSING_WAIT (30*HZ)
70 #define SPCP8x5_BUF_SIZE 1024
73 /* spcp8x5 spec register define */
74 #define MCR_CONTROL_LINE_RTS 0x02
75 #define MCR_CONTROL_LINE_DTR 0x01
79 #define MSR_STATUS_LINE_DCD 0x80
80 #define MSR_STATUS_LINE_RI 0x40
81 #define MSR_STATUS_LINE_DSR 0x20
82 #define MSR_STATUS_LINE_CTS 0x10
84 /* verdor command here , we should define myself */
85 #define SET_DEFAULT 0x40
86 #define SET_DEFAULT_TYPE 0x20
88 #define SET_UART_FORMAT 0x40
89 #define SET_UART_FORMAT_TYPE 0x21
90 #define SET_UART_FORMAT_SIZE_5 0x00
91 #define SET_UART_FORMAT_SIZE_6 0x01
92 #define SET_UART_FORMAT_SIZE_7 0x02
93 #define SET_UART_FORMAT_SIZE_8 0x03
94 #define SET_UART_FORMAT_STOP_1 0x00
95 #define SET_UART_FORMAT_STOP_2 0x04
96 #define SET_UART_FORMAT_PAR_NONE 0x00
97 #define SET_UART_FORMAT_PAR_ODD 0x10
98 #define SET_UART_FORMAT_PAR_EVEN 0x30
99 #define SET_UART_FORMAT_PAR_MASK 0xD0
100 #define SET_UART_FORMAT_PAR_SPACE 0x90
102 #define GET_UART_STATUS_TYPE 0xc0
103 #define GET_UART_STATUS 0x22
104 #define GET_UART_STATUS_MSR 0x06
106 #define SET_UART_STATUS 0x40
107 #define SET_UART_STATUS_TYPE 0x23
108 #define SET_UART_STATUS_MCR 0x0004
109 #define SET_UART_STATUS_MCR_DTR 0x01
110 #define SET_UART_STATUS_MCR_RTS 0x02
111 #define SET_UART_STATUS_MCR_LOOP 0x10
113 #define SET_WORKING_MODE 0x40
114 #define SET_WORKING_MODE_TYPE 0x24
115 #define SET_WORKING_MODE_U2C 0x00
116 #define SET_WORKING_MODE_RS485 0x01
117 #define SET_WORKING_MODE_PDMA 0x02
118 #define SET_WORKING_MODE_SPP 0x03
120 #define SET_FLOWCTL_CHAR 0x40
121 #define SET_FLOWCTL_CHAR_TYPE 0x25
123 #define GET_VERSION 0xc0
124 #define GET_VERSION_TYPE 0x26
126 #define SET_REGISTER 0x40
127 #define SET_REGISTER_TYPE 0x27
129 #define GET_REGISTER 0xc0
130 #define GET_REGISTER_TYPE 0x28
133 #define SET_RAM_TYPE 0x31
136 #define GET_RAM_TYPE 0x32
139 #define UART_STATE 0x08
140 #define UART_STATE_TRANSIENT_MASK 0x74
141 #define UART_DCD 0x01
142 #define UART_DSR 0x02
143 #define UART_BREAK_ERROR 0x04
144 #define UART_RING 0x08
145 #define UART_FRAME_ERROR 0x10
146 #define UART_PARITY_ERROR 0x20
147 #define UART_OVERRUN_ERROR 0x40
148 #define UART_CTS 0x80
154 SPCP825_INTERMATIC_TYPE
,
158 /* 1st in 1st out buffer 4 driver */
160 unsigned int buf_size
;
166 /* alloc the ring buf and alloc the buffer itself */
167 static inline struct ringbuf
*alloc_ringbuf(unsigned int size
)
174 pb
= kmalloc(sizeof(*pb
), GFP_KERNEL
);
178 pb
->buf_buf
= kmalloc(size
, GFP_KERNEL
);
179 if (pb
->buf_buf
== NULL
) {
185 pb
->buf_get
= pb
->buf_put
= pb
->buf_buf
;
190 /* free the ring buf and the buffer itself */
191 static inline void free_ringbuf(struct ringbuf
*pb
)
199 /* clear pipo , juest repoint the pointer here */
200 static inline void clear_ringbuf(struct ringbuf
*pb
)
203 pb
->buf_get
= pb
->buf_put
;
206 /* get the number of data in the pipo */
207 static inline unsigned int ringbuf_avail_data(struct ringbuf
*pb
)
211 return (pb
->buf_size
+ pb
->buf_put
- pb
->buf_get
) % pb
->buf_size
;
214 /* get the number of space in the pipo */
215 static inline unsigned int ringbuf_avail_space(struct ringbuf
*pb
)
219 return (pb
->buf_size
+ pb
->buf_get
- pb
->buf_put
- 1) % pb
->buf_size
;
222 /* put count data into pipo */
223 static unsigned int put_ringbuf(struct ringbuf
*pb
, const char *buf
,
231 len
= ringbuf_avail_space(pb
);
238 len
= pb
->buf_buf
+ pb
->buf_size
- pb
->buf_put
;
240 memcpy(pb
->buf_put
, buf
, len
);
241 memcpy(pb
->buf_buf
, buf
+len
, count
- len
);
242 pb
->buf_put
= pb
->buf_buf
+ count
- len
;
244 memcpy(pb
->buf_put
, buf
, count
);
246 pb
->buf_put
+= count
;
247 else /* count == len */
248 pb
->buf_put
= pb
->buf_buf
;
253 /* get count data from pipo */
254 static unsigned int get_ringbuf(struct ringbuf
*pb
, char *buf
,
259 if (pb
== NULL
|| buf
== NULL
)
262 len
= ringbuf_avail_data(pb
);
269 len
= pb
->buf_buf
+ pb
->buf_size
- pb
->buf_get
;
271 memcpy(buf
, pb
->buf_get
, len
);
272 memcpy(buf
+len
, pb
->buf_buf
, count
- len
);
273 pb
->buf_get
= pb
->buf_buf
+ count
- len
;
275 memcpy(buf
, pb
->buf_get
, count
);
277 pb
->buf_get
+= count
;
278 else /* count == len */
279 pb
->buf_get
= pb
->buf_buf
;
285 static struct usb_driver spcp8x5_driver
= {
287 .probe
= usb_serial_probe
,
288 .disconnect
= usb_serial_disconnect
,
289 .id_table
= id_table
,
294 struct spcp8x5_private
{
297 int write_urb_in_use
;
298 enum spcp8x5_type type
;
299 wait_queue_head_t delta_msr_wait
;
302 u8 termios_initialized
;
305 /* desc : when device plug in,this function would be called.
306 * thanks to usb_serial subsystem,then do almost every things for us. And what
307 * we should do just alloc the buffer */
308 static int spcp8x5_startup(struct usb_serial
*serial
)
310 struct spcp8x5_private
*priv
;
312 enum spcp8x5_type type
= SPCP825_007_TYPE
;
313 u16 product
= le16_to_cpu(serial
->dev
->descriptor
.idProduct
);
315 if (product
== 0x0201)
316 type
= SPCP825_007_TYPE
;
317 else if (product
== 0x0231)
319 else if (product
== 0x0235)
320 type
= SPCP825_008_TYPE
;
321 else if (product
== 0x0204)
322 type
= SPCP825_INTERMATIC_TYPE
;
323 else if (product
== 0x0471 &&
324 serial
->dev
->descriptor
.idVendor
== cpu_to_le16(0x081e))
325 type
= SPCP825_PHILIP_TYPE
;
326 dev_dbg(&serial
->dev
->dev
, "device type = %d\n", (int)type
);
328 for (i
= 0; i
< serial
->num_ports
; ++i
) {
329 priv
= kzalloc(sizeof(struct spcp8x5_private
), GFP_KERNEL
);
333 spin_lock_init(&priv
->lock
);
334 priv
->buf
= alloc_ringbuf(SPCP8x5_BUF_SIZE
);
335 if (priv
->buf
== NULL
)
338 init_waitqueue_head(&priv
->delta_msr_wait
);
340 usb_set_serial_port_data(serial
->port
[i
] , priv
);
349 for (--i
; i
>= 0; --i
) {
350 priv
= usb_get_serial_port_data(serial
->port
[i
]);
351 free_ringbuf(priv
->buf
);
353 usb_set_serial_port_data(serial
->port
[i
] , NULL
);
358 /* call when the device plug out. free all the memory alloced by probe */
359 static void spcp8x5_release(struct usb_serial
*serial
)
362 struct spcp8x5_private
*priv
;
364 for (i
= 0; i
< serial
->num_ports
; i
++) {
365 priv
= usb_get_serial_port_data(serial
->port
[i
]);
367 free_ringbuf(priv
->buf
);
373 /* set the modem control line of the device.
374 * NOTE spcp825-007 not supported this */
375 static int spcp8x5_set_ctrlLine(struct usb_device
*dev
, u8 value
,
376 enum spcp8x5_type type
)
381 if (type
== SPCP825_007_TYPE
)
384 mcr
= (unsigned short)value
;
385 retval
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
386 SET_UART_STATUS_TYPE
, SET_UART_STATUS
,
387 mcr
, 0x04, NULL
, 0, 100);
389 dev_dbg(&dev
->dev
, "usb_control_msg return %#x\n", retval
);
393 /* get the modem status register of the device
394 * NOTE spcp825-007 not supported this */
395 static int spcp8x5_get_msr(struct usb_device
*dev
, u8
*status
,
396 enum spcp8x5_type type
)
401 /* I return Permited not support here but seem inval device
403 if (type
== SPCP825_007_TYPE
)
408 status_buffer
= kmalloc(1, GFP_KERNEL
);
411 status_buffer
[0] = status
[0];
413 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
414 GET_UART_STATUS
, GET_UART_STATUS_TYPE
,
415 0, GET_UART_STATUS_MSR
, status_buffer
, 1, 100);
417 dev_dbg(&dev
->dev
, "Get MSR = 0x%p failed (error = %d)",
420 dev_dbg(&dev
->dev
, "0xc0:0x22:0:6 %d - 0x%p ", ret
, status_buffer
);
421 status
[0] = status_buffer
[0];
422 kfree(status_buffer
);
427 /* select the work mode.
428 * NOTE this function not supported by spcp825-007 */
429 static void spcp8x5_set_workMode(struct usb_device
*dev
, u16 value
,
430 u16 index
, enum spcp8x5_type type
)
434 /* I return Permited not support here but seem inval device
436 if (type
== SPCP825_007_TYPE
)
439 ret
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
440 SET_WORKING_MODE_TYPE
, SET_WORKING_MODE
,
441 value
, index
, NULL
, 0, 100);
442 dev_dbg(&dev
->dev
, "value = %#x , index = %#x\n", value
, index
);
445 "RTSCTS usb_control_msg(enable flowctrl) = %d\n", ret
);
448 static int spcp8x5_carrier_raised(struct usb_serial_port
*port
)
450 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
451 if (priv
->line_status
& MSR_STATUS_LINE_DCD
)
456 static void spcp8x5_dtr_rts(struct usb_serial_port
*port
, int on
)
458 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
462 spin_lock_irqsave(&priv
->lock
, flags
);
464 priv
->line_control
= MCR_CONTROL_LINE_DTR
465 | MCR_CONTROL_LINE_RTS
;
467 priv
->line_control
&= ~ (MCR_CONTROL_LINE_DTR
468 | MCR_CONTROL_LINE_RTS
);
469 control
= priv
->line_control
;
470 spin_unlock_irqrestore(&priv
->lock
, flags
);
471 spcp8x5_set_ctrlLine(port
->serial
->dev
, control
, priv
->type
);
474 /* close the serial port. We should wait for data sending to device 1st and
475 * then kill all urb. */
476 static void spcp8x5_close(struct usb_serial_port
*port
)
478 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
482 dbg("%s - port %d", __func__
, port
->number
);
484 spin_lock_irqsave(&priv
->lock
, flags
);
485 /* clear out any remaining data in the buffer */
486 clear_ringbuf(priv
->buf
);
487 spin_unlock_irqrestore(&priv
->lock
, flags
);
490 if (port
->write_urb
!= NULL
) {
491 result
= usb_unlink_urb(port
->write_urb
);
494 "usb_unlink_urb(write_urb) = %d\n", result
);
496 result
= usb_unlink_urb(port
->read_urb
);
498 dev_dbg(&port
->dev
, "usb_unlink_urb(read_urb) = %d\n", result
);
501 /* set the serial param for transfer. we should check if we really need to
502 * transfer. if we set flow control we should do this too. */
503 static void spcp8x5_set_termios(struct tty_struct
*tty
,
504 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
506 struct usb_serial
*serial
= port
->serial
;
507 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
509 unsigned int cflag
= tty
->termios
->c_cflag
;
510 unsigned int old_cflag
= old_termios
->c_cflag
;
511 unsigned short uartdata
;
512 unsigned char buf
[2] = {0, 0};
517 /* for the 1st time call this function */
518 spin_lock_irqsave(&priv
->lock
, flags
);
519 if (!priv
->termios_initialized
) {
520 *(tty
->termios
) = tty_std_termios
;
521 tty
->termios
->c_cflag
= B115200
| CS8
| CREAD
| HUPCL
| CLOCAL
;
522 tty
->termios
->c_ispeed
= 115200;
523 tty
->termios
->c_ospeed
= 115200;
524 priv
->termios_initialized
= 1;
526 spin_unlock_irqrestore(&priv
->lock
, flags
);
528 /* check that they really want us to change something */
529 if (!tty_termios_hw_change(tty
->termios
, old_termios
))
532 /* set DTR/RTS active */
533 spin_lock_irqsave(&priv
->lock
, flags
);
534 control
= priv
->line_control
;
535 if ((old_cflag
& CBAUD
) == B0
) {
536 priv
->line_control
|= MCR_DTR
;
537 if (!(old_cflag
& CRTSCTS
))
538 priv
->line_control
|= MCR_RTS
;
540 if (control
!= priv
->line_control
) {
541 control
= priv
->line_control
;
542 spin_unlock_irqrestore(&priv
->lock
, flags
);
543 spcp8x5_set_ctrlLine(serial
->dev
, control
, priv
->type
);
545 spin_unlock_irqrestore(&priv
->lock
, flags
);
549 baud
= tty_get_baud_rate(tty
);;
551 case 300: buf
[0] = 0x00; break;
552 case 600: buf
[0] = 0x01; break;
553 case 1200: buf
[0] = 0x02; break;
554 case 2400: buf
[0] = 0x03; break;
555 case 4800: buf
[0] = 0x04; break;
556 case 9600: buf
[0] = 0x05; break;
557 case 19200: buf
[0] = 0x07; break;
558 case 38400: buf
[0] = 0x09; break;
559 case 57600: buf
[0] = 0x0a; break;
560 case 115200: buf
[0] = 0x0b; break;
561 case 230400: buf
[0] = 0x0c; break;
562 case 460800: buf
[0] = 0x0d; break;
563 case 921600: buf
[0] = 0x0e; break;
564 /* case 1200000: buf[0] = 0x0f; break; */
565 /* case 2400000: buf[0] = 0x10; break; */
566 case 3000000: buf
[0] = 0x11; break;
567 /* case 6000000: buf[0] = 0x12; break; */
570 buf
[0] = 0x0b; break;
572 dev_err(&port
->dev
, "spcp825 driver does not support the "
573 "baudrate requested, using default of 9600.\n");
576 /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
578 switch (cflag
& CSIZE
) {
580 buf
[1] |= SET_UART_FORMAT_SIZE_5
;
583 buf
[1] |= SET_UART_FORMAT_SIZE_6
;
586 buf
[1] |= SET_UART_FORMAT_SIZE_7
;
590 buf
[1] |= SET_UART_FORMAT_SIZE_8
;
595 /* Set Stop bit2 : 0:1bit 1:2bit */
596 buf
[1] |= (cflag
& CSTOPB
) ? SET_UART_FORMAT_STOP_2
:
597 SET_UART_FORMAT_STOP_1
;
599 /* Set Parity bit3-4 01:Odd 11:Even */
600 if (cflag
& PARENB
) {
601 buf
[1] |= (cflag
& PARODD
) ?
602 SET_UART_FORMAT_PAR_ODD
: SET_UART_FORMAT_PAR_EVEN
;
604 buf
[1] |= SET_UART_FORMAT_PAR_NONE
;
606 uartdata
= buf
[0] | buf
[1]<<8;
608 i
= usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
609 SET_UART_FORMAT_TYPE
, SET_UART_FORMAT
,
610 uartdata
, 0, NULL
, 0, 100);
612 dev_err(&port
->dev
, "Set UART format %#x failed (error = %d)\n",
614 dbg("0x21:0x40:0:0 %d\n", i
);
616 if (cflag
& CRTSCTS
) {
617 /* enable hardware flow control */
618 spcp8x5_set_workMode(serial
->dev
, 0x000a,
619 SET_WORKING_MODE_U2C
, priv
->type
);
624 /* open the serial port. do some usb system call. set termios and get the line
625 * status of the device. then submit the read urb */
626 static int spcp8x5_open(struct tty_struct
*tty
,
627 struct usb_serial_port
*port
, struct file
*filp
)
629 struct ktermios tmp_termios
;
630 struct usb_serial
*serial
= port
->serial
;
631 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
635 /* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
637 dbg("%s - port %d", __func__
, port
->number
);
639 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
640 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
642 ret
= usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
644 0x01, 0x00, NULL
, 0x00, 100);
648 spcp8x5_set_ctrlLine(serial
->dev
, priv
->line_control
, priv
->type
);
652 spcp8x5_set_termios(tty
, port
, &tmp_termios
);
654 spcp8x5_get_msr(serial
->dev
, &status
, priv
->type
);
656 /* may be we should update uart status here but now we did not do */
657 spin_lock_irqsave(&priv
->lock
, flags
);
658 priv
->line_status
= status
& 0xf0 ;
659 spin_unlock_irqrestore(&priv
->lock
, flags
);
661 /* FIXME: need to assert RTS and DTR if CRTSCTS off */
663 dbg("%s - submitting read urb", __func__
);
664 port
->read_urb
->dev
= serial
->dev
;
665 ret
= usb_submit_urb(port
->read_urb
, GFP_KERNEL
);
670 port
->port
.drain_delay
= 256;
674 /* bulk read call back function. check the status of the urb. if transfer
675 * failed return. then update the status and the tty send data to tty subsys.
678 static void spcp8x5_read_bulk_callback(struct urb
*urb
)
680 struct usb_serial_port
*port
= urb
->context
;
681 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
682 struct tty_struct
*tty
;
683 unsigned char *data
= urb
->transfer_buffer
;
686 int result
= urb
->status
;
690 dev_dbg(&port
->dev
, "start, result = %d, urb->actual_length = %d\n,",
691 result
, urb
->actual_length
);
693 /* check the urb status */
695 if (!port
->port
.count
)
697 if (result
== -EPROTO
) {
698 /* spcp8x5 mysteriously fails with -EPROTO */
699 /* reschedule the read */
700 urb
->dev
= port
->serial
->dev
;
701 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
704 "failed submitting read urb %d\n",
708 dev_dbg(&port
->dev
, "unable to handle the error, exiting.\n");
712 /* get tty_flag from status */
713 tty_flag
= TTY_NORMAL
;
715 spin_lock_irqsave(&priv
->lock
, flags
);
716 status
= priv
->line_status
;
717 priv
->line_status
&= ~UART_STATE_TRANSIENT_MASK
;
718 spin_unlock_irqrestore(&priv
->lock
, flags
);
719 /* wake up the wait for termios */
720 wake_up_interruptible(&priv
->delta_msr_wait
);
722 /* break takes precedence over parity, which takes precedence over
724 if (status
& UART_BREAK_ERROR
)
725 tty_flag
= TTY_BREAK
;
726 else if (status
& UART_PARITY_ERROR
)
727 tty_flag
= TTY_PARITY
;
728 else if (status
& UART_FRAME_ERROR
)
729 tty_flag
= TTY_FRAME
;
730 dev_dbg(&port
->dev
, "tty_flag = %d\n", tty_flag
);
732 tty
= tty_port_tty_get(&port
->port
);
733 if (tty
&& urb
->actual_length
) {
734 tty_buffer_request_room(tty
, urb
->actual_length
+ 1);
735 /* overrun is special, not associated with a char */
736 if (status
& UART_OVERRUN_ERROR
)
737 tty_insert_flip_char(tty
, 0, TTY_OVERRUN
);
738 for (i
= 0; i
< urb
->actual_length
; ++i
)
739 tty_insert_flip_char(tty
, data
[i
], tty_flag
);
740 tty_flip_buffer_push(tty
);
744 /* Schedule the next read _if_ we are still open */
745 if (port
->port
.count
) {
746 urb
->dev
= port
->serial
->dev
;
747 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
749 dev_dbg(&port
->dev
, "failed submitting read urb %d\n",
756 /* get data from ring buffer and then write to usb bus */
757 static void spcp8x5_send(struct usb_serial_port
*port
)
760 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
763 spin_lock_irqsave(&priv
->lock
, flags
);
765 if (priv
->write_urb_in_use
) {
766 dev_dbg(&port
->dev
, "write urb still used\n");
767 spin_unlock_irqrestore(&priv
->lock
, flags
);
771 /* send the 1st urb for writting */
772 memset(port
->write_urb
->transfer_buffer
, 0x00 , port
->bulk_out_size
);
773 count
= get_ringbuf(priv
->buf
, port
->write_urb
->transfer_buffer
,
774 port
->bulk_out_size
);
777 spin_unlock_irqrestore(&priv
->lock
, flags
);
781 /* update the urb status */
782 priv
->write_urb_in_use
= 1;
784 spin_unlock_irqrestore(&priv
->lock
, flags
);
786 port
->write_urb
->transfer_buffer_length
= count
;
787 port
->write_urb
->dev
= port
->serial
->dev
;
789 result
= usb_submit_urb(port
->write_urb
, GFP_ATOMIC
);
791 dev_dbg(&port
->dev
, "failed submitting write urb, error %d\n",
793 priv
->write_urb_in_use
= 0;
794 /* TODO: reschedule spcp8x5_send */
798 schedule_work(&port
->work
);
801 /* this is the call back function for write urb. NOTE we should not sleep in
802 * this routine. check the urb return code and then submit the write urb again
803 * to hold the write loop */
804 static void spcp8x5_write_bulk_callback(struct urb
*urb
)
806 struct usb_serial_port
*port
= urb
->context
;
807 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
809 int status
= urb
->status
;
818 /* this urb is terminated, clean up */
819 dev_dbg(&port
->dev
, "urb shutting down with status: %d\n",
821 priv
->write_urb_in_use
= 0;
824 /* error in the urb, so we have to resubmit it */
825 dbg("%s - Overflow in write", __func__
);
826 dbg("%s - nonzero write bulk status received: %d",
828 port
->write_urb
->transfer_buffer_length
= 1;
829 port
->write_urb
->dev
= port
->serial
->dev
;
830 result
= usb_submit_urb(port
->write_urb
, GFP_ATOMIC
);
833 "failed resubmitting write urb %d\n", result
);
838 priv
->write_urb_in_use
= 0;
840 /* send any buffered data */
844 /* write data to ring buffer. and then start the write transfer */
845 static int spcp8x5_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
846 const unsigned char *buf
, int count
)
848 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
851 dev_dbg(&port
->dev
, "%d bytes\n", count
);
856 spin_lock_irqsave(&priv
->lock
, flags
);
857 count
= put_ringbuf(priv
->buf
, buf
, count
);
858 spin_unlock_irqrestore(&priv
->lock
, flags
);
865 static int spcp8x5_wait_modem_info(struct usb_serial_port
*port
,
868 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
870 unsigned int prevstatus
;
872 unsigned int changed
;
874 spin_lock_irqsave(&priv
->lock
, flags
);
875 prevstatus
= priv
->line_status
;
876 spin_unlock_irqrestore(&priv
->lock
, flags
);
879 /* wake up in bulk read */
880 interruptible_sleep_on(&priv
->delta_msr_wait
);
882 /* see if a signal did it */
883 if (signal_pending(current
))
886 spin_lock_irqsave(&priv
->lock
, flags
);
887 status
= priv
->line_status
;
888 spin_unlock_irqrestore(&priv
->lock
, flags
);
890 changed
= prevstatus
^status
;
892 if (((arg
& TIOCM_RNG
) && (changed
& MSR_STATUS_LINE_RI
)) ||
893 ((arg
& TIOCM_DSR
) && (changed
& MSR_STATUS_LINE_DSR
)) ||
894 ((arg
& TIOCM_CD
) && (changed
& MSR_STATUS_LINE_DCD
)) ||
895 ((arg
& TIOCM_CTS
) && (changed
& MSR_STATUS_LINE_CTS
)))
904 static int spcp8x5_ioctl(struct tty_struct
*tty
, struct file
*file
,
905 unsigned int cmd
, unsigned long arg
)
907 struct usb_serial_port
*port
= tty
->driver_data
;
908 dbg("%s (%d) cmd = 0x%04x", __func__
, port
->number
, cmd
);
912 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
913 return spcp8x5_wait_modem_info(port
, arg
);
916 dbg("%s not supported = 0x%04x", __func__
, cmd
);
923 static int spcp8x5_tiocmset(struct tty_struct
*tty
, struct file
*file
,
924 unsigned int set
, unsigned int clear
)
926 struct usb_serial_port
*port
= tty
->driver_data
;
927 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
931 spin_lock_irqsave(&priv
->lock
, flags
);
933 priv
->line_control
|= MCR_RTS
;
935 priv
->line_control
|= MCR_DTR
;
936 if (clear
& TIOCM_RTS
)
937 priv
->line_control
&= ~MCR_RTS
;
938 if (clear
& TIOCM_DTR
)
939 priv
->line_control
&= ~MCR_DTR
;
940 control
= priv
->line_control
;
941 spin_unlock_irqrestore(&priv
->lock
, flags
);
943 return spcp8x5_set_ctrlLine(port
->serial
->dev
, control
, priv
->type
);
946 static int spcp8x5_tiocmget(struct tty_struct
*tty
, struct file
*file
)
948 struct usb_serial_port
*port
= tty
->driver_data
;
949 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
955 spin_lock_irqsave(&priv
->lock
, flags
);
956 mcr
= priv
->line_control
;
957 status
= priv
->line_status
;
958 spin_unlock_irqrestore(&priv
->lock
, flags
);
960 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
961 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
962 | ((status
& MSR_STATUS_LINE_CTS
) ? TIOCM_CTS
: 0)
963 | ((status
& MSR_STATUS_LINE_DSR
) ? TIOCM_DSR
: 0)
964 | ((status
& MSR_STATUS_LINE_RI
) ? TIOCM_RI
: 0)
965 | ((status
& MSR_STATUS_LINE_DCD
) ? TIOCM_CD
: 0);
970 /* get the avail space room in ring buffer */
971 static int spcp8x5_write_room(struct tty_struct
*tty
)
973 struct usb_serial_port
*port
= tty
->driver_data
;
974 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
978 spin_lock_irqsave(&priv
->lock
, flags
);
979 room
= ringbuf_avail_space(priv
->buf
);
980 spin_unlock_irqrestore(&priv
->lock
, flags
);
985 /* get the number of avail data in write ring buffer */
986 static int spcp8x5_chars_in_buffer(struct tty_struct
*tty
)
988 struct usb_serial_port
*port
= tty
->driver_data
;
989 struct spcp8x5_private
*priv
= usb_get_serial_port_data(port
);
993 spin_lock_irqsave(&priv
->lock
, flags
);
994 chars
= ringbuf_avail_data(priv
->buf
);
995 spin_unlock_irqrestore(&priv
->lock
, flags
);
1000 /* All of the device info needed for the spcp8x5 SIO serial converter */
1001 static struct usb_serial_driver spcp8x5_device
= {
1003 .owner
= THIS_MODULE
,
1006 .id_table
= id_table
,
1008 .open
= spcp8x5_open
,
1009 .close
= spcp8x5_close
,
1010 .dtr_rts
= spcp8x5_dtr_rts
,
1011 .carrier_raised
= spcp8x5_carrier_raised
,
1012 .write
= spcp8x5_write
,
1013 .set_termios
= spcp8x5_set_termios
,
1014 .ioctl
= spcp8x5_ioctl
,
1015 .tiocmget
= spcp8x5_tiocmget
,
1016 .tiocmset
= spcp8x5_tiocmset
,
1017 .write_room
= spcp8x5_write_room
,
1018 .read_bulk_callback
= spcp8x5_read_bulk_callback
,
1019 .write_bulk_callback
= spcp8x5_write_bulk_callback
,
1020 .chars_in_buffer
= spcp8x5_chars_in_buffer
,
1021 .attach
= spcp8x5_startup
,
1022 .release
= spcp8x5_release
,
1025 static int __init
spcp8x5_init(void)
1028 retval
= usb_serial_register(&spcp8x5_device
);
1030 goto failed_usb_serial_register
;
1031 retval
= usb_register(&spcp8x5_driver
);
1033 goto failed_usb_register
;
1034 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
1037 failed_usb_register
:
1038 usb_serial_deregister(&spcp8x5_device
);
1039 failed_usb_serial_register
:
1043 static void __exit
spcp8x5_exit(void)
1045 usb_deregister(&spcp8x5_driver
);
1046 usb_serial_deregister(&spcp8x5_device
);
1049 module_init(spcp8x5_init
);
1050 module_exit(spcp8x5_exit
);
1052 MODULE_DESCRIPTION(DRIVER_DESC
);
1053 MODULE_VERSION(DRIVER_VERSION
);
1054 MODULE_LICENSE("GPL");
1056 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
1057 MODULE_PARM_DESC(debug
, "Debug enabled or not");