Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Prolific PL2303 USB to serial adaptor driver | |
3 | * | |
4d0dce3e | 4 | * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
5 | * Copyright (C) 2003 IBM Corp. |
6 | * | |
7 | * Original driver for 2.2.x by anonymous | |
8 | * | |
4d0dce3e GKH |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License version | |
11 | * 2 as published by the Free Software Foundation. | |
1da177e4 LT |
12 | * |
13 | * See Documentation/usb/usb-serial.txt for more information on using this driver | |
14 | * | |
1da177e4 LT |
15 | */ |
16 | ||
1da177e4 LT |
17 | #include <linux/kernel.h> |
18 | #include <linux/errno.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/tty.h> | |
22 | #include <linux/tty_driver.h> | |
23 | #include <linux/tty_flip.h> | |
24 | #include <linux/serial.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/moduleparam.h> | |
27 | #include <linux/spinlock.h> | |
28 | #include <asm/uaccess.h> | |
29 | #include <linux/usb.h> | |
a969888c | 30 | #include <linux/usb/serial.h> |
1da177e4 LT |
31 | #include "pl2303.h" |
32 | ||
33 | /* | |
34 | * Version Information | |
35 | */ | |
1da177e4 LT |
36 | #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" |
37 | ||
38 | static int debug; | |
39 | ||
40 | #define PL2303_CLOSING_WAIT (30*HZ) | |
41 | ||
42 | #define PL2303_BUF_SIZE 1024 | |
43 | #define PL2303_TMP_BUF_SIZE 1024 | |
44 | ||
1da177e4 LT |
45 | struct pl2303_buf { |
46 | unsigned int buf_size; | |
47 | char *buf_buf; | |
48 | char *buf_get; | |
49 | char *buf_put; | |
50 | }; | |
51 | ||
52 | static struct usb_device_id id_table [] = { | |
53 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, | |
54 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, | |
3d861494 | 55 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, |
1da177e4 LT |
56 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, |
57 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, | |
b483b6aa | 58 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, |
4be2fa18 | 59 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, |
727df356 | 60 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, |
1da177e4 | 61 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
8a28dea3 | 62 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, |
1da177e4 LT |
63 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
64 | { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, | |
65 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, | |
66 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, | |
67 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, | |
58381719 | 68 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, |
1da177e4 LT |
69 | { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
70 | { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, | |
71 | { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, | |
72 | { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, | |
73 | { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, | |
74 | { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, | |
75 | { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, | |
76 | { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, | |
a8310f3b | 77 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, |
1da177e4 | 78 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, |
a8310f3b | 79 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, |
e7beb667 | 80 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) }, |
acbb36f1 | 81 | { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, |
c6c27721 CL |
82 | { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, |
83 | { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, | |
6cceb05f | 84 | { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, |
c6c27721 | 85 | { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, |
491b04ce | 86 | { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, |
3b928474 | 87 | { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, |
b7aa94b6 | 88 | { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, |
8fd80133 | 89 | { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, |
2d94b981 | 90 | { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, |
9e3285db | 91 | { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, |
002e8f2c | 92 | { USB_DEVICE(HL340_VENDOR_ID, HL340_PRODUCT_ID) }, |
cc311ee7 | 93 | { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, |
1da177e4 LT |
94 | { } /* Terminating entry */ |
95 | }; | |
96 | ||
372db8a7 | 97 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 LT |
98 | |
99 | static struct usb_driver pl2303_driver = { | |
1da177e4 LT |
100 | .name = "pl2303", |
101 | .probe = usb_serial_probe, | |
102 | .disconnect = usb_serial_disconnect, | |
103 | .id_table = id_table, | |
fcf9e55e SS |
104 | .suspend = usb_serial_suspend, |
105 | .resume = usb_serial_resume, | |
ba9dc657 | 106 | .no_dynamic_id = 1, |
fcf9e55e | 107 | .supports_autosuspend = 1, |
1da177e4 LT |
108 | }; |
109 | ||
110 | #define SET_LINE_REQUEST_TYPE 0x21 | |
111 | #define SET_LINE_REQUEST 0x20 | |
112 | ||
113 | #define SET_CONTROL_REQUEST_TYPE 0x21 | |
114 | #define SET_CONTROL_REQUEST 0x22 | |
115 | #define CONTROL_DTR 0x01 | |
116 | #define CONTROL_RTS 0x02 | |
117 | ||
118 | #define BREAK_REQUEST_TYPE 0x21 | |
119 | #define BREAK_REQUEST 0x23 | |
120 | #define BREAK_ON 0xffff | |
121 | #define BREAK_OFF 0x0000 | |
122 | ||
123 | #define GET_LINE_REQUEST_TYPE 0xa1 | |
124 | #define GET_LINE_REQUEST 0x21 | |
125 | ||
126 | #define VENDOR_WRITE_REQUEST_TYPE 0x40 | |
127 | #define VENDOR_WRITE_REQUEST 0x01 | |
128 | ||
129 | #define VENDOR_READ_REQUEST_TYPE 0xc0 | |
130 | #define VENDOR_READ_REQUEST 0x01 | |
131 | ||
132 | #define UART_STATE 0x08 | |
133 | #define UART_STATE_TRANSIENT_MASK 0x74 | |
134 | #define UART_DCD 0x01 | |
135 | #define UART_DSR 0x02 | |
136 | #define UART_BREAK_ERROR 0x04 | |
137 | #define UART_RING 0x08 | |
138 | #define UART_FRAME_ERROR 0x10 | |
139 | #define UART_PARITY_ERROR 0x20 | |
140 | #define UART_OVERRUN_ERROR 0x40 | |
141 | #define UART_CTS 0x80 | |
142 | ||
1da177e4 LT |
143 | |
144 | enum pl2303_type { | |
145 | type_0, /* don't know the difference between type 0 and */ | |
146 | type_1, /* type 1, until someone from prolific tells us... */ | |
147 | HX, /* HX version of the pl2303 chip */ | |
148 | }; | |
149 | ||
150 | struct pl2303_private { | |
151 | spinlock_t lock; | |
152 | struct pl2303_buf *buf; | |
153 | int write_urb_in_use; | |
154 | wait_queue_head_t delta_msr_wait; | |
155 | u8 line_control; | |
156 | u8 line_status; | |
157 | u8 termios_initialized; | |
158 | enum pl2303_type type; | |
159 | }; | |
160 | ||
572d3138 TG |
161 | /* |
162 | * pl2303_buf_alloc | |
163 | * | |
164 | * Allocate a circular buffer and all associated memory. | |
165 | */ | |
166 | static struct pl2303_buf *pl2303_buf_alloc(unsigned int size) | |
167 | { | |
168 | struct pl2303_buf *pb; | |
169 | ||
170 | if (size == 0) | |
171 | return NULL; | |
172 | ||
5cbded58 | 173 | pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL); |
572d3138 TG |
174 | if (pb == NULL) |
175 | return NULL; | |
176 | ||
177 | pb->buf_buf = kmalloc(size, GFP_KERNEL); | |
178 | if (pb->buf_buf == NULL) { | |
179 | kfree(pb); | |
180 | return NULL; | |
181 | } | |
182 | ||
183 | pb->buf_size = size; | |
184 | pb->buf_get = pb->buf_put = pb->buf_buf; | |
185 | ||
186 | return pb; | |
187 | } | |
188 | ||
189 | /* | |
190 | * pl2303_buf_free | |
191 | * | |
192 | * Free the buffer and all associated memory. | |
193 | */ | |
194 | static void pl2303_buf_free(struct pl2303_buf *pb) | |
195 | { | |
196 | if (pb) { | |
197 | kfree(pb->buf_buf); | |
198 | kfree(pb); | |
199 | } | |
200 | } | |
201 | ||
202 | /* | |
203 | * pl2303_buf_clear | |
204 | * | |
205 | * Clear out all data in the circular buffer. | |
206 | */ | |
207 | static void pl2303_buf_clear(struct pl2303_buf *pb) | |
208 | { | |
209 | if (pb != NULL) | |
210 | pb->buf_get = pb->buf_put; | |
211 | /* equivalent to a get of all data available */ | |
212 | } | |
213 | ||
214 | /* | |
215 | * pl2303_buf_data_avail | |
216 | * | |
217 | * Return the number of bytes of data available in the circular | |
218 | * buffer. | |
219 | */ | |
220 | static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb) | |
221 | { | |
222 | if (pb == NULL) | |
223 | return 0; | |
224 | ||
225 | return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size); | |
226 | } | |
227 | ||
228 | /* | |
229 | * pl2303_buf_space_avail | |
230 | * | |
231 | * Return the number of bytes of space available in the circular | |
232 | * buffer. | |
233 | */ | |
234 | static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb) | |
235 | { | |
236 | if (pb == NULL) | |
237 | return 0; | |
238 | ||
239 | return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size); | |
240 | } | |
241 | ||
242 | /* | |
243 | * pl2303_buf_put | |
244 | * | |
245 | * Copy data data from a user buffer and put it into the circular buffer. | |
246 | * Restrict to the amount of space available. | |
247 | * | |
248 | * Return the number of bytes copied. | |
249 | */ | |
250 | static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, | |
251 | unsigned int count) | |
252 | { | |
253 | unsigned int len; | |
254 | ||
255 | if (pb == NULL) | |
256 | return 0; | |
257 | ||
258 | len = pl2303_buf_space_avail(pb); | |
259 | if (count > len) | |
260 | count = len; | |
261 | ||
262 | if (count == 0) | |
263 | return 0; | |
264 | ||
265 | len = pb->buf_buf + pb->buf_size - pb->buf_put; | |
266 | if (count > len) { | |
267 | memcpy(pb->buf_put, buf, len); | |
268 | memcpy(pb->buf_buf, buf+len, count - len); | |
269 | pb->buf_put = pb->buf_buf + count - len; | |
270 | } else { | |
271 | memcpy(pb->buf_put, buf, count); | |
272 | if (count < len) | |
273 | pb->buf_put += count; | |
274 | else /* count == len */ | |
275 | pb->buf_put = pb->buf_buf; | |
276 | } | |
277 | ||
278 | return count; | |
279 | } | |
280 | ||
281 | /* | |
282 | * pl2303_buf_get | |
283 | * | |
284 | * Get data from the circular buffer and copy to the given buffer. | |
285 | * Restrict to the amount of data available. | |
286 | * | |
287 | * Return the number of bytes copied. | |
288 | */ | |
289 | static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, | |
290 | unsigned int count) | |
291 | { | |
292 | unsigned int len; | |
293 | ||
294 | if (pb == NULL) | |
295 | return 0; | |
296 | ||
297 | len = pl2303_buf_data_avail(pb); | |
298 | if (count > len) | |
299 | count = len; | |
300 | ||
301 | if (count == 0) | |
302 | return 0; | |
303 | ||
304 | len = pb->buf_buf + pb->buf_size - pb->buf_get; | |
305 | if (count > len) { | |
306 | memcpy(buf, pb->buf_get, len); | |
307 | memcpy(buf+len, pb->buf_buf, count - len); | |
308 | pb->buf_get = pb->buf_buf + count - len; | |
309 | } else { | |
310 | memcpy(buf, pb->buf_get, count); | |
311 | if (count < len) | |
312 | pb->buf_get += count; | |
313 | else /* count == len */ | |
314 | pb->buf_get = pb->buf_buf; | |
315 | } | |
316 | ||
317 | return count; | |
318 | } | |
1da177e4 | 319 | |
eb44da0b SS |
320 | static int pl2303_vendor_read(__u16 value, __u16 index, |
321 | struct usb_serial *serial, unsigned char *buf) | |
322 | { | |
323 | int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
324 | VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, | |
325 | value, index, buf, 1, 100); | |
326 | dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE, | |
327 | VENDOR_READ_REQUEST, value, index, res, buf[0]); | |
328 | return res; | |
329 | } | |
330 | ||
331 | static int pl2303_vendor_write(__u16 value, __u16 index, | |
332 | struct usb_serial *serial) | |
333 | { | |
334 | int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
335 | VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, | |
336 | value, index, NULL, 0, 100); | |
337 | dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE, | |
338 | VENDOR_WRITE_REQUEST, value, index, res); | |
339 | return res; | |
340 | } | |
341 | ||
372db8a7 | 342 | static int pl2303_startup(struct usb_serial *serial) |
1da177e4 LT |
343 | { |
344 | struct pl2303_private *priv; | |
345 | enum pl2303_type type = type_0; | |
3e152505 | 346 | unsigned char *buf; |
1da177e4 LT |
347 | int i; |
348 | ||
3e152505 SS |
349 | buf = kmalloc(10, GFP_KERNEL); |
350 | if (buf == NULL) | |
351 | return -ENOMEM; | |
352 | ||
1da177e4 LT |
353 | if (serial->dev->descriptor.bDeviceClass == 0x02) |
354 | type = type_0; | |
355 | else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) | |
356 | type = HX; | |
357 | else if (serial->dev->descriptor.bDeviceClass == 0x00) | |
358 | type = type_1; | |
359 | else if (serial->dev->descriptor.bDeviceClass == 0xFF) | |
360 | type = type_1; | |
361 | dbg("device type: %d", type); | |
362 | ||
363 | for (i = 0; i < serial->num_ports; ++i) { | |
80b6ca48 | 364 | priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL); |
1da177e4 LT |
365 | if (!priv) |
366 | goto cleanup; | |
1da177e4 LT |
367 | spin_lock_init(&priv->lock); |
368 | priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE); | |
369 | if (priv->buf == NULL) { | |
370 | kfree(priv); | |
371 | goto cleanup; | |
372 | } | |
373 | init_waitqueue_head(&priv->delta_msr_wait); | |
374 | priv->type = type; | |
375 | usb_set_serial_port_data(serial->port[i], priv); | |
376 | } | |
3e152505 SS |
377 | |
378 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
379 | pl2303_vendor_write(0x0404, 0, serial); | |
380 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
381 | pl2303_vendor_read(0x8383, 0, serial, buf); | |
382 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
383 | pl2303_vendor_write(0x0404, 1, serial); | |
384 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
385 | pl2303_vendor_read(0x8383, 0, serial, buf); | |
386 | pl2303_vendor_write(0, 1, serial); | |
387 | pl2303_vendor_write(1, 0, serial); | |
388 | if (type == HX) | |
389 | pl2303_vendor_write(2, 0x44, serial); | |
390 | else | |
391 | pl2303_vendor_write(2, 0x24, serial); | |
392 | ||
393 | kfree(buf); | |
1da177e4 LT |
394 | return 0; |
395 | ||
396 | cleanup: | |
3e152505 | 397 | kfree(buf); |
1da177e4 LT |
398 | for (--i; i>=0; --i) { |
399 | priv = usb_get_serial_port_data(serial->port[i]); | |
400 | pl2303_buf_free(priv->buf); | |
401 | kfree(priv); | |
402 | usb_set_serial_port_data(serial->port[i], NULL); | |
403 | } | |
404 | return -ENOMEM; | |
405 | } | |
406 | ||
372db8a7 | 407 | static int set_control_lines(struct usb_device *dev, u8 value) |
1da177e4 LT |
408 | { |
409 | int retval; | |
410 | ||
372db8a7 TG |
411 | retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
412 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, | |
413 | value, 0, NULL, 0, 100); | |
441b62c1 | 414 | dbg("%s - value = %d, retval = %d", __func__, value, retval); |
1da177e4 LT |
415 | return retval; |
416 | } | |
417 | ||
1da177e4 LT |
418 | static void pl2303_send(struct usb_serial_port *port) |
419 | { | |
420 | int count, result; | |
421 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
422 | unsigned long flags; | |
423 | ||
441b62c1 | 424 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
425 | |
426 | spin_lock_irqsave(&priv->lock, flags); | |
427 | ||
428 | if (priv->write_urb_in_use) { | |
429 | spin_unlock_irqrestore(&priv->lock, flags); | |
430 | return; | |
431 | } | |
432 | ||
433 | count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer, | |
372db8a7 | 434 | port->bulk_out_size); |
1da177e4 LT |
435 | |
436 | if (count == 0) { | |
437 | spin_unlock_irqrestore(&priv->lock, flags); | |
438 | return; | |
439 | } | |
440 | ||
441 | priv->write_urb_in_use = 1; | |
442 | ||
443 | spin_unlock_irqrestore(&priv->lock, flags); | |
444 | ||
441b62c1 | 445 | usb_serial_debug_data(debug, &port->dev, __func__, count, |
372db8a7 | 446 | port->write_urb->transfer_buffer); |
1da177e4 LT |
447 | |
448 | port->write_urb->transfer_buffer_length = count; | |
449 | port->write_urb->dev = port->serial->dev; | |
372db8a7 | 450 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1da177e4 | 451 | if (result) { |
372db8a7 | 452 | dev_err(&port->dev, "%s - failed submitting write urb," |
441b62c1 | 453 | " error %d\n", __func__, result); |
1da177e4 LT |
454 | priv->write_urb_in_use = 0; |
455 | // TODO: reschedule pl2303_send | |
456 | } | |
457 | ||
cf2c7481 | 458 | usb_serial_port_softint(port); |
1da177e4 LT |
459 | } |
460 | ||
95da310e AC |
461 | static int pl2303_write(struct tty_struct *tty, struct usb_serial_port *port, |
462 | const unsigned char *buf, int count) | |
572d3138 TG |
463 | { |
464 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
465 | unsigned long flags; | |
466 | ||
441b62c1 | 467 | dbg("%s - port %d, %d bytes", __func__, port->number, count); |
572d3138 TG |
468 | |
469 | if (!count) | |
470 | return count; | |
471 | ||
472 | spin_lock_irqsave(&priv->lock, flags); | |
473 | count = pl2303_buf_put(priv->buf, buf, count); | |
474 | spin_unlock_irqrestore(&priv->lock, flags); | |
475 | ||
476 | pl2303_send(port); | |
477 | ||
478 | return count; | |
479 | } | |
480 | ||
95da310e | 481 | static int pl2303_write_room(struct tty_struct *tty) |
1da177e4 | 482 | { |
95da310e | 483 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
484 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
485 | int room = 0; | |
486 | unsigned long flags; | |
487 | ||
441b62c1 | 488 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
489 | |
490 | spin_lock_irqsave(&priv->lock, flags); | |
491 | room = pl2303_buf_space_avail(priv->buf); | |
492 | spin_unlock_irqrestore(&priv->lock, flags); | |
493 | ||
441b62c1 | 494 | dbg("%s - returns %d", __func__, room); |
1da177e4 LT |
495 | return room; |
496 | } | |
497 | ||
95da310e | 498 | static int pl2303_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 499 | { |
95da310e | 500 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
501 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
502 | int chars = 0; | |
503 | unsigned long flags; | |
504 | ||
441b62c1 | 505 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
506 | |
507 | spin_lock_irqsave(&priv->lock, flags); | |
508 | chars = pl2303_buf_data_avail(priv->buf); | |
509 | spin_unlock_irqrestore(&priv->lock, flags); | |
510 | ||
441b62c1 | 511 | dbg("%s - returns %d", __func__, chars); |
1da177e4 LT |
512 | return chars; |
513 | } | |
514 | ||
95da310e AC |
515 | static void pl2303_set_termios(struct tty_struct *tty, |
516 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
517 | { |
518 | struct usb_serial *serial = port->serial; | |
519 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
520 | unsigned long flags; | |
521 | unsigned int cflag; | |
522 | unsigned char *buf; | |
523 | int baud; | |
524 | int i; | |
525 | u8 control; | |
526 | ||
441b62c1 | 527 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 528 | |
1da177e4 LT |
529 | spin_lock_irqsave(&priv->lock, flags); |
530 | if (!priv->termios_initialized) { | |
95da310e AC |
531 | *(tty->termios) = tty_std_termios; |
532 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
533 | tty->termios->c_ispeed = 9600; | |
534 | tty->termios->c_ospeed = 9600; | |
1da177e4 LT |
535 | priv->termios_initialized = 1; |
536 | } | |
537 | spin_unlock_irqrestore(&priv->lock, flags); | |
538 | ||
bf5e5834 AC |
539 | /* The PL2303 is reported to lose bytes if you change |
540 | serial settings even to the same values as before. Thus | |
541 | we actually need to filter in this specific case */ | |
542 | ||
95da310e | 543 | if (!tty_termios_hw_change(tty->termios, old_termios)) |
bf5e5834 AC |
544 | return; |
545 | ||
95da310e | 546 | cflag = tty->termios->c_cflag; |
1da177e4 | 547 | |
372db8a7 | 548 | buf = kzalloc(7, GFP_KERNEL); |
1da177e4 | 549 | if (!buf) { |
441b62c1 | 550 | dev_err(&port->dev, "%s - out of memory.\n", __func__); |
a5b6f60c | 551 | /* Report back no change occurred */ |
95da310e | 552 | *tty->termios = *old_termios; |
1da177e4 LT |
553 | return; |
554 | } | |
1da177e4 | 555 | |
372db8a7 TG |
556 | i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
557 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
558 | 0, 0, buf, 7, 100); | |
559 | dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, | |
560 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); | |
1da177e4 LT |
561 | |
562 | if (cflag & CSIZE) { | |
563 | switch (cflag & CSIZE) { | |
564 | case CS5: buf[6] = 5; break; | |
565 | case CS6: buf[6] = 6; break; | |
566 | case CS7: buf[6] = 7; break; | |
567 | default: | |
568 | case CS8: buf[6] = 8; break; | |
569 | } | |
441b62c1 | 570 | dbg("%s - data bits = %d", __func__, buf[6]); |
1da177e4 LT |
571 | } |
572 | ||
95da310e | 573 | baud = tty_get_baud_rate(tty); |
441b62c1 | 574 | dbg("%s - baud = %d", __func__, baud); |
1da177e4 LT |
575 | if (baud) { |
576 | buf[0] = baud & 0xff; | |
577 | buf[1] = (baud >> 8) & 0xff; | |
578 | buf[2] = (baud >> 16) & 0xff; | |
579 | buf[3] = (baud >> 24) & 0xff; | |
580 | } | |
581 | ||
582 | /* For reference buf[4]=0 is 1 stop bits */ | |
583 | /* For reference buf[4]=1 is 1.5 stop bits */ | |
584 | /* For reference buf[4]=2 is 2 stop bits */ | |
585 | if (cflag & CSTOPB) { | |
586 | buf[4] = 2; | |
441b62c1 | 587 | dbg("%s - stop bits = 2", __func__); |
1da177e4 LT |
588 | } else { |
589 | buf[4] = 0; | |
441b62c1 | 590 | dbg("%s - stop bits = 1", __func__); |
1da177e4 LT |
591 | } |
592 | ||
593 | if (cflag & PARENB) { | |
594 | /* For reference buf[5]=0 is none parity */ | |
595 | /* For reference buf[5]=1 is odd parity */ | |
596 | /* For reference buf[5]=2 is even parity */ | |
597 | /* For reference buf[5]=3 is mark parity */ | |
598 | /* For reference buf[5]=4 is space parity */ | |
599 | if (cflag & PARODD) { | |
600 | buf[5] = 1; | |
441b62c1 | 601 | dbg("%s - parity = odd", __func__); |
1da177e4 LT |
602 | } else { |
603 | buf[5] = 2; | |
441b62c1 | 604 | dbg("%s - parity = even", __func__); |
1da177e4 LT |
605 | } |
606 | } else { | |
607 | buf[5] = 0; | |
441b62c1 | 608 | dbg("%s - parity = none", __func__); |
1da177e4 LT |
609 | } |
610 | ||
372db8a7 TG |
611 | i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
612 | SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, | |
613 | 0, 0, buf, 7, 100); | |
614 | dbg("0x21:0x20:0:0 %d", i); | |
1da177e4 LT |
615 | |
616 | /* change control lines if we are switching to or from B0 */ | |
617 | spin_lock_irqsave(&priv->lock, flags); | |
618 | control = priv->line_control; | |
619 | if ((cflag & CBAUD) == B0) | |
620 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
621 | else | |
622 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
623 | if (control != priv->line_control) { | |
624 | control = priv->line_control; | |
625 | spin_unlock_irqrestore(&priv->lock, flags); | |
626 | set_control_lines(serial->dev, control); | |
627 | } else { | |
628 | spin_unlock_irqrestore(&priv->lock, flags); | |
629 | } | |
372db8a7 | 630 | |
1da177e4 LT |
631 | buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0; |
632 | ||
372db8a7 TG |
633 | i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
634 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
635 | 0, 0, buf, 7, 100); | |
636 | dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, | |
1da177e4 LT |
637 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); |
638 | ||
639 | if (cflag & CRTSCTS) { | |
1da177e4 | 640 | if (priv->type == HX) |
eb44da0b | 641 | pl2303_vendor_write(0x0, 0x61, serial); |
1da177e4 | 642 | else |
eb44da0b | 643 | pl2303_vendor_write(0x0, 0x41, serial); |
715f9527 | 644 | } else { |
eb44da0b | 645 | pl2303_vendor_write(0x0, 0x0, serial); |
1da177e4 | 646 | } |
572d3138 | 647 | |
df64c471 AC |
648 | /* FIXME: Need to read back resulting baud rate */ |
649 | if (baud) | |
95da310e | 650 | tty_encode_baud_rate(tty, baud, baud); |
df64c471 | 651 | |
572d3138 TG |
652 | kfree(buf); |
653 | } | |
654 | ||
95da310e AC |
655 | static void pl2303_close(struct tty_struct *tty, |
656 | struct usb_serial_port *port, struct file *filp) | |
572d3138 TG |
657 | { |
658 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
659 | unsigned long flags; | |
660 | unsigned int c_cflag; | |
661 | int bps; | |
662 | long timeout; | |
663 | wait_queue_t wait; | |
664 | ||
441b62c1 | 665 | dbg("%s - port %d", __func__, port->number); |
572d3138 TG |
666 | |
667 | /* wait for data to drain from the buffer */ | |
668 | spin_lock_irqsave(&priv->lock, flags); | |
669 | timeout = PL2303_CLOSING_WAIT; | |
670 | init_waitqueue_entry(&wait, current); | |
95da310e | 671 | add_wait_queue(&tty->write_wait, &wait); |
572d3138 TG |
672 | for (;;) { |
673 | set_current_state(TASK_INTERRUPTIBLE); | |
674 | if (pl2303_buf_data_avail(priv->buf) == 0 || | |
675 | timeout == 0 || signal_pending(current) || | |
0915f490 | 676 | port->serial->disconnected) |
572d3138 TG |
677 | break; |
678 | spin_unlock_irqrestore(&priv->lock, flags); | |
679 | timeout = schedule_timeout(timeout); | |
680 | spin_lock_irqsave(&priv->lock, flags); | |
681 | } | |
682 | set_current_state(TASK_RUNNING); | |
95da310e | 683 | remove_wait_queue(&tty->write_wait, &wait); |
572d3138 TG |
684 | /* clear out any remaining data in the buffer */ |
685 | pl2303_buf_clear(priv->buf); | |
686 | spin_unlock_irqrestore(&priv->lock, flags); | |
687 | ||
688 | /* wait for characters to drain from the device */ | |
689 | /* (this is long enough for the entire 256 byte */ | |
690 | /* pl2303 hardware buffer to drain with no flow */ | |
691 | /* control for data rates of 1200 bps or more, */ | |
692 | /* for lower rates we should really know how much */ | |
693 | /* data is in the buffer to compute a delay */ | |
694 | /* that is not unnecessarily long) */ | |
95da310e | 695 | bps = tty_get_baud_rate(tty); |
572d3138 TG |
696 | if (bps > 1200) |
697 | timeout = max((HZ*2560)/bps,HZ/10); | |
698 | else | |
699 | timeout = 2*HZ; | |
700 | schedule_timeout_interruptible(timeout); | |
701 | ||
702 | /* shutdown our urbs */ | |
441b62c1 | 703 | dbg("%s - shutting down urbs", __func__); |
572d3138 TG |
704 | usb_kill_urb(port->write_urb); |
705 | usb_kill_urb(port->read_urb); | |
706 | usb_kill_urb(port->interrupt_in_urb); | |
707 | ||
95da310e AC |
708 | if (tty) { |
709 | c_cflag = tty->termios->c_cflag; | |
572d3138 TG |
710 | if (c_cflag & HUPCL) { |
711 | /* drop DTR and RTS */ | |
712 | spin_lock_irqsave(&priv->lock, flags); | |
713 | priv->line_control = 0; | |
714 | spin_unlock_irqrestore(&priv->lock, flags); | |
715 | set_control_lines(port->serial->dev, 0); | |
716 | } | |
717 | } | |
1da177e4 LT |
718 | } |
719 | ||
95da310e AC |
720 | static int pl2303_open(struct tty_struct *tty, |
721 | struct usb_serial_port *port, struct file *filp) | |
1da177e4 | 722 | { |
606d099c | 723 | struct ktermios tmp_termios; |
1da177e4 LT |
724 | struct usb_serial *serial = port->serial; |
725 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
1da177e4 LT |
726 | int result; |
727 | ||
441b62c1 | 728 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 729 | |
1694899f D |
730 | if (priv->type != HX) { |
731 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
732 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
3e152505 | 733 | } else { |
1da177e4 | 734 | /* reset upstream data pipes */ |
eb44da0b SS |
735 | pl2303_vendor_write(8, 0, serial); |
736 | pl2303_vendor_write(9, 0, serial); | |
1da177e4 LT |
737 | } |
738 | ||
1da177e4 | 739 | /* Setup termios */ |
95da310e AC |
740 | if (tty) |
741 | pl2303_set_termios(tty, port, &tmp_termios); | |
1da177e4 LT |
742 | |
743 | //FIXME: need to assert RTS and DTR if CRTSCTS off | |
744 | ||
441b62c1 | 745 | dbg("%s - submitting read urb", __func__); |
1da177e4 | 746 | port->read_urb->dev = serial->dev; |
372db8a7 | 747 | result = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1da177e4 | 748 | if (result) { |
372db8a7 | 749 | dev_err(&port->dev, "%s - failed submitting read urb," |
441b62c1 | 750 | " error %d\n", __func__, result); |
95da310e | 751 | pl2303_close(tty, port, NULL); |
1da177e4 LT |
752 | return -EPROTO; |
753 | } | |
754 | ||
441b62c1 | 755 | dbg("%s - submitting interrupt urb", __func__); |
1da177e4 | 756 | port->interrupt_in_urb->dev = serial->dev; |
372db8a7 | 757 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
1da177e4 | 758 | if (result) { |
372db8a7 | 759 | dev_err(&port->dev, "%s - failed submitting interrupt urb," |
441b62c1 | 760 | " error %d\n", __func__, result); |
95da310e | 761 | pl2303_close(tty, port, NULL); |
1da177e4 LT |
762 | return -EPROTO; |
763 | } | |
764 | return 0; | |
765 | } | |
766 | ||
95da310e | 767 | static int pl2303_tiocmset(struct tty_struct *tty, struct file *file, |
372db8a7 | 768 | unsigned int set, unsigned int clear) |
1da177e4 | 769 | { |
95da310e | 770 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
771 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
772 | unsigned long flags; | |
773 | u8 control; | |
774 | ||
6fdd8e8e FL |
775 | if (!usb_get_intfdata(port->serial->interface)) |
776 | return -ENODEV; | |
777 | ||
372db8a7 | 778 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
779 | if (set & TIOCM_RTS) |
780 | priv->line_control |= CONTROL_RTS; | |
781 | if (set & TIOCM_DTR) | |
782 | priv->line_control |= CONTROL_DTR; | |
783 | if (clear & TIOCM_RTS) | |
784 | priv->line_control &= ~CONTROL_RTS; | |
785 | if (clear & TIOCM_DTR) | |
786 | priv->line_control &= ~CONTROL_DTR; | |
787 | control = priv->line_control; | |
372db8a7 | 788 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 789 | |
372db8a7 | 790 | return set_control_lines(port->serial->dev, control); |
1da177e4 LT |
791 | } |
792 | ||
95da310e | 793 | static int pl2303_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 794 | { |
95da310e | 795 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
796 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
797 | unsigned long flags; | |
798 | unsigned int mcr; | |
799 | unsigned int status; | |
800 | unsigned int result; | |
801 | ||
441b62c1 | 802 | dbg("%s (%d)", __func__, port->number); |
1da177e4 | 803 | |
6fdd8e8e FL |
804 | if (!usb_get_intfdata(port->serial->interface)) |
805 | return -ENODEV; | |
806 | ||
372db8a7 | 807 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
808 | mcr = priv->line_control; |
809 | status = priv->line_status; | |
372db8a7 | 810 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
811 | |
812 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) | |
813 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) | |
814 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
815 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
816 | | ((status & UART_RING) ? TIOCM_RI : 0) | |
817 | | ((status & UART_DCD) ? TIOCM_CD : 0); | |
818 | ||
441b62c1 | 819 | dbg("%s - result = %x", __func__, result); |
1da177e4 LT |
820 | |
821 | return result; | |
822 | } | |
823 | ||
824 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) | |
825 | { | |
826 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
827 | unsigned long flags; | |
828 | unsigned int prevstatus; | |
829 | unsigned int status; | |
830 | unsigned int changed; | |
831 | ||
372db8a7 | 832 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 833 | prevstatus = priv->line_status; |
372db8a7 | 834 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
835 | |
836 | while (1) { | |
837 | interruptible_sleep_on(&priv->delta_msr_wait); | |
838 | /* see if a signal did it */ | |
839 | if (signal_pending(current)) | |
840 | return -ERESTARTSYS; | |
372db8a7 TG |
841 | |
842 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 843 | status = priv->line_status; |
372db8a7 TG |
844 | spin_unlock_irqrestore(&priv->lock, flags); |
845 | ||
1da177e4 | 846 | changed=prevstatus^status; |
372db8a7 | 847 | |
1da177e4 LT |
848 | if (((arg & TIOCM_RNG) && (changed & UART_RING)) || |
849 | ((arg & TIOCM_DSR) && (changed & UART_DSR)) || | |
850 | ((arg & TIOCM_CD) && (changed & UART_DCD)) || | |
851 | ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) { | |
852 | return 0; | |
853 | } | |
854 | prevstatus = status; | |
855 | } | |
856 | /* NOTREACHED */ | |
857 | return 0; | |
858 | } | |
859 | ||
95da310e | 860 | static int pl2303_ioctl(struct tty_struct *tty, struct file *file, |
372db8a7 | 861 | unsigned int cmd, unsigned long arg) |
1da177e4 | 862 | { |
95da310e | 863 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 864 | dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); |
1da177e4 LT |
865 | |
866 | switch (cmd) { | |
867 | case TIOCMIWAIT: | |
441b62c1 | 868 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
1da177e4 LT |
869 | return wait_modem_info(port, arg); |
870 | ||
871 | default: | |
441b62c1 | 872 | dbg("%s not supported = 0x%04x", __func__, cmd); |
1da177e4 LT |
873 | break; |
874 | } | |
875 | ||
876 | return -ENOIOCTLCMD; | |
877 | } | |
878 | ||
95da310e | 879 | static void pl2303_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 880 | { |
95da310e | 881 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
882 | struct usb_serial *serial = port->serial; |
883 | u16 state; | |
884 | int result; | |
885 | ||
441b62c1 | 886 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
887 | |
888 | if (break_state == 0) | |
889 | state = BREAK_OFF; | |
890 | else | |
891 | state = BREAK_ON; | |
441b62c1 | 892 | dbg("%s - turning break %s", __func__, state==BREAK_OFF ? "off" : "on"); |
1da177e4 | 893 | |
372db8a7 TG |
894 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
895 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, | |
896 | 0, NULL, 0, 100); | |
1da177e4 | 897 | if (result) |
441b62c1 | 898 | dbg("%s - error sending break = %d", __func__, result); |
1da177e4 LT |
899 | } |
900 | ||
372db8a7 | 901 | static void pl2303_shutdown(struct usb_serial *serial) |
1da177e4 LT |
902 | { |
903 | int i; | |
904 | struct pl2303_private *priv; | |
905 | ||
441b62c1 | 906 | dbg("%s", __func__); |
1da177e4 LT |
907 | |
908 | for (i = 0; i < serial->num_ports; ++i) { | |
909 | priv = usb_get_serial_port_data(serial->port[i]); | |
910 | if (priv) { | |
911 | pl2303_buf_free(priv->buf); | |
912 | kfree(priv); | |
913 | usb_set_serial_port_data(serial->port[i], NULL); | |
914 | } | |
372db8a7 | 915 | } |
1da177e4 LT |
916 | } |
917 | ||
97bb13ec FL |
918 | static void pl2303_update_line_status(struct usb_serial_port *port, |
919 | unsigned char *data, | |
920 | unsigned int actual_length) | |
921 | { | |
922 | ||
923 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
924 | unsigned long flags; | |
925 | u8 status_idx = UART_STATE; | |
95f209f9 | 926 | u8 length = UART_STATE + 1; |
9c537616 | 927 | u16 idv, idp; |
97bb13ec | 928 | |
9c537616 TG |
929 | idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); |
930 | idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); | |
931 | ||
932 | ||
933 | if (idv == SIEMENS_VENDOR_ID) { | |
934 | if (idp == SIEMENS_PRODUCT_ID_X65 || | |
935 | idp == SIEMENS_PRODUCT_ID_SX1 || | |
936 | idp == SIEMENS_PRODUCT_ID_X75) { | |
937 | ||
938 | length = 1; | |
939 | status_idx = 0; | |
940 | } | |
97bb13ec FL |
941 | } |
942 | ||
943 | if (actual_length < length) | |
a009b75a | 944 | return; |
97bb13ec FL |
945 | |
946 | /* Save off the uart status for others to look at */ | |
947 | spin_lock_irqsave(&priv->lock, flags); | |
948 | priv->line_status = data[status_idx]; | |
949 | spin_unlock_irqrestore(&priv->lock, flags); | |
372db8a7 | 950 | wake_up_interruptible(&priv->delta_msr_wait); |
97bb13ec | 951 | } |
1da177e4 | 952 | |
7d12e780 | 953 | static void pl2303_read_int_callback(struct urb *urb) |
1da177e4 | 954 | { |
cdc97792 | 955 | struct usb_serial_port *port = urb->context; |
1da177e4 | 956 | unsigned char *data = urb->transfer_buffer; |
97bb13ec | 957 | unsigned int actual_length = urb->actual_length; |
461d696a GKH |
958 | int status = urb->status; |
959 | int retval; | |
1da177e4 | 960 | |
441b62c1 | 961 | dbg("%s (%d)", __func__, port->number); |
1da177e4 | 962 | |
461d696a | 963 | switch (status) { |
1da177e4 LT |
964 | case 0: |
965 | /* success */ | |
966 | break; | |
967 | case -ECONNRESET: | |
968 | case -ENOENT: | |
969 | case -ESHUTDOWN: | |
970 | /* this urb is terminated, clean up */ | |
441b62c1 | 971 | dbg("%s - urb shutting down with status: %d", __func__, |
461d696a | 972 | status); |
1da177e4 LT |
973 | return; |
974 | default: | |
441b62c1 | 975 | dbg("%s - nonzero urb status received: %d", __func__, |
461d696a | 976 | status); |
1da177e4 LT |
977 | goto exit; |
978 | } | |
979 | ||
441b62c1 | 980 | usb_serial_debug_data(debug, &port->dev, __func__, |
372db8a7 TG |
981 | urb->actual_length, urb->transfer_buffer); |
982 | ||
97bb13ec | 983 | pl2303_update_line_status(port, data, actual_length); |
1da177e4 | 984 | |
1da177e4 | 985 | exit: |
461d696a GKH |
986 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
987 | if (retval) | |
372db8a7 TG |
988 | dev_err(&urb->dev->dev, |
989 | "%s - usb_submit_urb failed with result %d\n", | |
441b62c1 | 990 | __func__, retval); |
1da177e4 LT |
991 | } |
992 | ||
7d12e780 | 993 | static void pl2303_read_bulk_callback(struct urb *urb) |
1da177e4 | 994 | { |
cdc97792 | 995 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
996 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
997 | struct tty_struct *tty; | |
998 | unsigned char *data = urb->transfer_buffer; | |
999 | unsigned long flags; | |
1000 | int i; | |
1001 | int result; | |
461d696a GKH |
1002 | int status = urb->status; |
1003 | u8 line_status; | |
1da177e4 LT |
1004 | char tty_flag; |
1005 | ||
441b62c1 | 1006 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1007 | |
461d696a | 1008 | if (status) { |
441b62c1 | 1009 | dbg("%s - urb status = %d", __func__, status); |
95da310e | 1010 | if (!port->port.count) { |
441b62c1 | 1011 | dbg("%s - port is closed, exiting.", __func__); |
1da177e4 LT |
1012 | return; |
1013 | } | |
461d696a | 1014 | if (status == -EPROTO) { |
372db8a7 TG |
1015 | /* PL2303 mysteriously fails with -EPROTO reschedule |
1016 | * the read */ | |
1017 | dbg("%s - caught -EPROTO, resubmitting the urb", | |
441b62c1 | 1018 | __func__); |
1da177e4 LT |
1019 | urb->dev = port->serial->dev; |
1020 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1021 | if (result) | |
372db8a7 TG |
1022 | dev_err(&urb->dev->dev, "%s - failed" |
1023 | " resubmitting read urb, error %d\n", | |
441b62c1 | 1024 | __func__, result); |
1da177e4 LT |
1025 | return; |
1026 | } | |
441b62c1 | 1027 | dbg("%s - unable to handle the error, exiting.", __func__); |
1da177e4 LT |
1028 | return; |
1029 | } | |
1030 | ||
441b62c1 | 1031 | usb_serial_debug_data(debug, &port->dev, __func__, |
372db8a7 | 1032 | urb->actual_length, data); |
1da177e4 LT |
1033 | |
1034 | /* get tty_flag from status */ | |
1035 | tty_flag = TTY_NORMAL; | |
1036 | ||
1037 | spin_lock_irqsave(&priv->lock, flags); | |
461d696a | 1038 | line_status = priv->line_status; |
1da177e4 LT |
1039 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; |
1040 | spin_unlock_irqrestore(&priv->lock, flags); | |
372db8a7 | 1041 | wake_up_interruptible(&priv->delta_msr_wait); |
1da177e4 LT |
1042 | |
1043 | /* break takes precedence over parity, */ | |
1044 | /* which takes precedence over framing errors */ | |
461d696a | 1045 | if (line_status & UART_BREAK_ERROR ) |
1da177e4 | 1046 | tty_flag = TTY_BREAK; |
461d696a | 1047 | else if (line_status & UART_PARITY_ERROR) |
1da177e4 | 1048 | tty_flag = TTY_PARITY; |
461d696a | 1049 | else if (line_status & UART_FRAME_ERROR) |
1da177e4 | 1050 | tty_flag = TTY_FRAME; |
441b62c1 | 1051 | dbg("%s - tty_flag = %d", __func__, tty_flag); |
1da177e4 | 1052 | |
95da310e | 1053 | tty = port->port.tty; |
1da177e4 | 1054 | if (tty && urb->actual_length) { |
33f0f88f | 1055 | tty_buffer_request_room(tty, urb->actual_length + 1); |
1da177e4 | 1056 | /* overrun is special, not associated with a char */ |
461d696a | 1057 | if (line_status & UART_OVERRUN_ERROR) |
1da177e4 | 1058 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
33f0f88f | 1059 | for (i = 0; i < urb->actual_length; ++i) |
372db8a7 TG |
1060 | tty_insert_flip_char(tty, data[i], tty_flag); |
1061 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
1062 | } |
1063 | ||
1064 | /* Schedule the next read _if_ we are still open */ | |
95da310e | 1065 | if (port->port.count) { |
1da177e4 LT |
1066 | urb->dev = port->serial->dev; |
1067 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1068 | if (result) | |
372db8a7 | 1069 | dev_err(&urb->dev->dev, "%s - failed resubmitting" |
441b62c1 | 1070 | " read urb, error %d\n", __func__, result); |
1da177e4 LT |
1071 | } |
1072 | ||
1073 | return; | |
1074 | } | |
1075 | ||
7d12e780 | 1076 | static void pl2303_write_bulk_callback(struct urb *urb) |
1da177e4 | 1077 | { |
cdc97792 | 1078 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1079 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
1080 | int result; | |
461d696a | 1081 | int status = urb->status; |
1da177e4 | 1082 | |
441b62c1 | 1083 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1084 | |
461d696a | 1085 | switch (status) { |
1da177e4 LT |
1086 | case 0: |
1087 | /* success */ | |
1088 | break; | |
1089 | case -ECONNRESET: | |
1090 | case -ENOENT: | |
1091 | case -ESHUTDOWN: | |
1092 | /* this urb is terminated, clean up */ | |
441b62c1 | 1093 | dbg("%s - urb shutting down with status: %d", __func__, |
461d696a | 1094 | status); |
1da177e4 LT |
1095 | priv->write_urb_in_use = 0; |
1096 | return; | |
1097 | default: | |
1098 | /* error in the urb, so we have to resubmit it */ | |
441b62c1 HH |
1099 | dbg("%s - Overflow in write", __func__); |
1100 | dbg("%s - nonzero write bulk status received: %d", __func__, | |
461d696a | 1101 | status); |
1da177e4 LT |
1102 | port->write_urb->transfer_buffer_length = 1; |
1103 | port->write_urb->dev = port->serial->dev; | |
372db8a7 | 1104 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1da177e4 | 1105 | if (result) |
372db8a7 | 1106 | dev_err(&urb->dev->dev, "%s - failed resubmitting write" |
441b62c1 | 1107 | " urb, error %d\n", __func__, result); |
1da177e4 LT |
1108 | else |
1109 | return; | |
1110 | } | |
1111 | ||
1112 | priv->write_urb_in_use = 0; | |
1113 | ||
1114 | /* send any buffered data */ | |
1115 | pl2303_send(port); | |
1116 | } | |
1117 | ||
572d3138 TG |
1118 | /* All of the device info needed for the PL2303 SIO serial converter */ |
1119 | static struct usb_serial_driver pl2303_device = { | |
1120 | .driver = { | |
1121 | .owner = THIS_MODULE, | |
1122 | .name = "pl2303", | |
1123 | }, | |
1124 | .id_table = id_table, | |
d9b1b787 | 1125 | .usb_driver = &pl2303_driver, |
572d3138 TG |
1126 | .num_ports = 1, |
1127 | .open = pl2303_open, | |
1128 | .close = pl2303_close, | |
1129 | .write = pl2303_write, | |
1130 | .ioctl = pl2303_ioctl, | |
1131 | .break_ctl = pl2303_break_ctl, | |
1132 | .set_termios = pl2303_set_termios, | |
1133 | .tiocmget = pl2303_tiocmget, | |
1134 | .tiocmset = pl2303_tiocmset, | |
1135 | .read_bulk_callback = pl2303_read_bulk_callback, | |
1136 | .read_int_callback = pl2303_read_int_callback, | |
1137 | .write_bulk_callback = pl2303_write_bulk_callback, | |
1138 | .write_room = pl2303_write_room, | |
1139 | .chars_in_buffer = pl2303_chars_in_buffer, | |
1140 | .attach = pl2303_startup, | |
1141 | .shutdown = pl2303_shutdown, | |
1142 | }; | |
1da177e4 | 1143 | |
372db8a7 | 1144 | static int __init pl2303_init(void) |
1da177e4 LT |
1145 | { |
1146 | int retval; | |
372db8a7 | 1147 | |
1da177e4 LT |
1148 | retval = usb_serial_register(&pl2303_device); |
1149 | if (retval) | |
1150 | goto failed_usb_serial_register; | |
1151 | retval = usb_register(&pl2303_driver); | |
1152 | if (retval) | |
1153 | goto failed_usb_register; | |
17a882fc | 1154 | info(DRIVER_DESC); |
1da177e4 LT |
1155 | return 0; |
1156 | failed_usb_register: | |
1157 | usb_serial_deregister(&pl2303_device); | |
1158 | failed_usb_serial_register: | |
1159 | return retval; | |
1160 | } | |
1161 | ||
372db8a7 | 1162 | static void __exit pl2303_exit(void) |
1da177e4 | 1163 | { |
372db8a7 TG |
1164 | usb_deregister(&pl2303_driver); |
1165 | usb_serial_deregister(&pl2303_device); | |
1da177e4 LT |
1166 | } |
1167 | ||
1da177e4 LT |
1168 | module_init(pl2303_init); |
1169 | module_exit(pl2303_exit); | |
1170 | ||
1171 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1172 | MODULE_LICENSE("GPL"); |
1173 | ||
1174 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1175 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1176 |