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 | 12 | * |
3a0f43e9 AC |
13 | * See Documentation/usb/usb-serial.txt for more information on using this |
14 | * driver | |
1da177e4 | 15 | * |
1da177e4 LT |
16 | */ |
17 | ||
1da177e4 LT |
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/serial.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <linux/spinlock.h> | |
3a0f43e9 | 29 | #include <linux/uaccess.h> |
1da177e4 | 30 | #include <linux/usb.h> |
a969888c | 31 | #include <linux/usb/serial.h> |
1da177e4 LT |
32 | #include "pl2303.h" |
33 | ||
34 | /* | |
35 | * Version Information | |
36 | */ | |
1da177e4 LT |
37 | #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" |
38 | ||
39 | static int debug; | |
40 | ||
41 | #define PL2303_CLOSING_WAIT (30*HZ) | |
42 | ||
43 | #define PL2303_BUF_SIZE 1024 | |
44 | #define PL2303_TMP_BUF_SIZE 1024 | |
45 | ||
1da177e4 LT |
46 | struct pl2303_buf { |
47 | unsigned int buf_size; | |
48 | char *buf_buf; | |
49 | char *buf_get; | |
50 | char *buf_put; | |
51 | }; | |
52 | ||
53 | static struct usb_device_id id_table [] = { | |
54 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, | |
55 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, | |
3d861494 | 56 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, |
1da177e4 LT |
57 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, |
58 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, | |
b483b6aa | 59 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, |
4be2fa18 | 60 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, |
727df356 | 61 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, |
1da177e4 | 62 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
8a28dea3 | 63 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, |
1da177e4 LT |
64 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
65 | { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, | |
66 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, | |
67 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, | |
68 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, | |
58381719 | 69 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, |
1da177e4 LT |
70 | { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
71 | { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, | |
72 | { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, | |
73 | { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, | |
74 | { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, | |
75 | { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, | |
76 | { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, | |
77 | { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, | |
a8310f3b | 78 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, |
1da177e4 | 79 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, |
a8310f3b | 80 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, |
e7beb667 | 81 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) }, |
acbb36f1 | 82 | { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, |
c6c27721 CL |
83 | { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, |
84 | { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, | |
6cceb05f | 85 | { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, |
c6c27721 | 86 | { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, |
491b04ce | 87 | { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, |
3b928474 | 88 | { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, |
b7aa94b6 | 89 | { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, |
8fd80133 | 90 | { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, |
2d94b981 | 91 | { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, |
9e3285db | 92 | { USB_DEVICE(COREGA_VENDOR_ID, COREGA_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 | |
3a0f43e9 | 119 | #define BREAK_REQUEST 0x23 |
1da177e4 LT |
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; | |
1da177e4 LT |
157 | enum pl2303_type type; |
158 | }; | |
159 | ||
572d3138 TG |
160 | /* |
161 | * pl2303_buf_alloc | |
162 | * | |
163 | * Allocate a circular buffer and all associated memory. | |
164 | */ | |
165 | static struct pl2303_buf *pl2303_buf_alloc(unsigned int size) | |
166 | { | |
167 | struct pl2303_buf *pb; | |
168 | ||
169 | if (size == 0) | |
170 | return NULL; | |
171 | ||
5cbded58 | 172 | pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL); |
572d3138 TG |
173 | if (pb == NULL) |
174 | return NULL; | |
175 | ||
176 | pb->buf_buf = kmalloc(size, GFP_KERNEL); | |
177 | if (pb->buf_buf == NULL) { | |
178 | kfree(pb); | |
179 | return NULL; | |
180 | } | |
181 | ||
182 | pb->buf_size = size; | |
183 | pb->buf_get = pb->buf_put = pb->buf_buf; | |
184 | ||
185 | return pb; | |
186 | } | |
187 | ||
188 | /* | |
189 | * pl2303_buf_free | |
190 | * | |
191 | * Free the buffer and all associated memory. | |
192 | */ | |
193 | static void pl2303_buf_free(struct pl2303_buf *pb) | |
194 | { | |
195 | if (pb) { | |
196 | kfree(pb->buf_buf); | |
197 | kfree(pb); | |
198 | } | |
199 | } | |
200 | ||
201 | /* | |
202 | * pl2303_buf_clear | |
203 | * | |
204 | * Clear out all data in the circular buffer. | |
205 | */ | |
206 | static void pl2303_buf_clear(struct pl2303_buf *pb) | |
207 | { | |
208 | if (pb != NULL) | |
209 | pb->buf_get = pb->buf_put; | |
210 | /* equivalent to a get of all data available */ | |
211 | } | |
212 | ||
213 | /* | |
214 | * pl2303_buf_data_avail | |
215 | * | |
216 | * Return the number of bytes of data available in the circular | |
217 | * buffer. | |
218 | */ | |
219 | static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb) | |
220 | { | |
221 | if (pb == NULL) | |
222 | return 0; | |
223 | ||
3a0f43e9 | 224 | return (pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size; |
572d3138 TG |
225 | } |
226 | ||
227 | /* | |
228 | * pl2303_buf_space_avail | |
229 | * | |
230 | * Return the number of bytes of space available in the circular | |
231 | * buffer. | |
232 | */ | |
233 | static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb) | |
234 | { | |
235 | if (pb == NULL) | |
236 | return 0; | |
237 | ||
3a0f43e9 | 238 | return (pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size; |
572d3138 TG |
239 | } |
240 | ||
241 | /* | |
242 | * pl2303_buf_put | |
243 | * | |
244 | * Copy data data from a user buffer and put it into the circular buffer. | |
245 | * Restrict to the amount of space available. | |
246 | * | |
247 | * Return the number of bytes copied. | |
248 | */ | |
249 | static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, | |
250 | unsigned int count) | |
251 | { | |
252 | unsigned int len; | |
253 | ||
254 | if (pb == NULL) | |
255 | return 0; | |
256 | ||
257 | len = pl2303_buf_space_avail(pb); | |
258 | if (count > len) | |
259 | count = len; | |
260 | ||
261 | if (count == 0) | |
262 | return 0; | |
263 | ||
264 | len = pb->buf_buf + pb->buf_size - pb->buf_put; | |
265 | if (count > len) { | |
266 | memcpy(pb->buf_put, buf, len); | |
267 | memcpy(pb->buf_buf, buf+len, count - len); | |
268 | pb->buf_put = pb->buf_buf + count - len; | |
269 | } else { | |
270 | memcpy(pb->buf_put, buf, count); | |
271 | if (count < len) | |
272 | pb->buf_put += count; | |
273 | else /* count == len */ | |
274 | pb->buf_put = pb->buf_buf; | |
275 | } | |
276 | ||
277 | return count; | |
278 | } | |
279 | ||
280 | /* | |
281 | * pl2303_buf_get | |
282 | * | |
283 | * Get data from the circular buffer and copy to the given buffer. | |
284 | * Restrict to the amount of data available. | |
285 | * | |
286 | * Return the number of bytes copied. | |
287 | */ | |
288 | static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, | |
289 | unsigned int count) | |
290 | { | |
291 | unsigned int len; | |
292 | ||
293 | if (pb == NULL) | |
294 | return 0; | |
295 | ||
296 | len = pl2303_buf_data_avail(pb); | |
297 | if (count > len) | |
298 | count = len; | |
299 | ||
300 | if (count == 0) | |
301 | return 0; | |
302 | ||
303 | len = pb->buf_buf + pb->buf_size - pb->buf_get; | |
304 | if (count > len) { | |
305 | memcpy(buf, pb->buf_get, len); | |
306 | memcpy(buf+len, pb->buf_buf, count - len); | |
307 | pb->buf_get = pb->buf_buf + count - len; | |
308 | } else { | |
309 | memcpy(buf, pb->buf_get, count); | |
310 | if (count < len) | |
311 | pb->buf_get += count; | |
312 | else /* count == len */ | |
313 | pb->buf_get = pb->buf_buf; | |
314 | } | |
315 | ||
316 | return count; | |
317 | } | |
1da177e4 | 318 | |
eb44da0b SS |
319 | static int pl2303_vendor_read(__u16 value, __u16 index, |
320 | struct usb_serial *serial, unsigned char *buf) | |
321 | { | |
322 | int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
323 | VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, | |
324 | value, index, buf, 1, 100); | |
325 | dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE, | |
326 | VENDOR_READ_REQUEST, value, index, res, buf[0]); | |
327 | return res; | |
328 | } | |
329 | ||
330 | static int pl2303_vendor_write(__u16 value, __u16 index, | |
331 | struct usb_serial *serial) | |
332 | { | |
333 | int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
334 | VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, | |
335 | value, index, NULL, 0, 100); | |
336 | dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE, | |
337 | VENDOR_WRITE_REQUEST, value, index, res); | |
338 | return res; | |
339 | } | |
340 | ||
372db8a7 | 341 | static int pl2303_startup(struct usb_serial *serial) |
1da177e4 LT |
342 | { |
343 | struct pl2303_private *priv; | |
344 | enum pl2303_type type = type_0; | |
3e152505 | 345 | unsigned char *buf; |
1da177e4 LT |
346 | int i; |
347 | ||
3e152505 SS |
348 | buf = kmalloc(10, GFP_KERNEL); |
349 | if (buf == NULL) | |
350 | return -ENOMEM; | |
351 | ||
1da177e4 LT |
352 | if (serial->dev->descriptor.bDeviceClass == 0x02) |
353 | type = type_0; | |
354 | else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) | |
355 | type = HX; | |
356 | else if (serial->dev->descriptor.bDeviceClass == 0x00) | |
357 | type = type_1; | |
358 | else if (serial->dev->descriptor.bDeviceClass == 0xFF) | |
359 | type = type_1; | |
360 | dbg("device type: %d", type); | |
361 | ||
362 | for (i = 0; i < serial->num_ports; ++i) { | |
80b6ca48 | 363 | priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL); |
1da177e4 LT |
364 | if (!priv) |
365 | goto cleanup; | |
1da177e4 LT |
366 | spin_lock_init(&priv->lock); |
367 | priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE); | |
368 | if (priv->buf == NULL) { | |
369 | kfree(priv); | |
370 | goto cleanup; | |
371 | } | |
372 | init_waitqueue_head(&priv->delta_msr_wait); | |
373 | priv->type = type; | |
374 | usb_set_serial_port_data(serial->port[i], priv); | |
375 | } | |
3e152505 SS |
376 | |
377 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
378 | pl2303_vendor_write(0x0404, 0, serial); | |
379 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
380 | pl2303_vendor_read(0x8383, 0, serial, buf); | |
381 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
382 | pl2303_vendor_write(0x0404, 1, serial); | |
383 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
384 | pl2303_vendor_read(0x8383, 0, serial, buf); | |
385 | pl2303_vendor_write(0, 1, serial); | |
386 | pl2303_vendor_write(1, 0, serial); | |
387 | if (type == HX) | |
388 | pl2303_vendor_write(2, 0x44, serial); | |
389 | else | |
390 | pl2303_vendor_write(2, 0x24, serial); | |
391 | ||
392 | kfree(buf); | |
1da177e4 LT |
393 | return 0; |
394 | ||
395 | cleanup: | |
3e152505 | 396 | kfree(buf); |
3a0f43e9 | 397 | for (--i; i >= 0; --i) { |
1da177e4 LT |
398 | priv = usb_get_serial_port_data(serial->port[i]); |
399 | pl2303_buf_free(priv->buf); | |
400 | kfree(priv); | |
401 | usb_set_serial_port_data(serial->port[i], NULL); | |
402 | } | |
403 | return -ENOMEM; | |
404 | } | |
405 | ||
372db8a7 | 406 | static int set_control_lines(struct usb_device *dev, u8 value) |
1da177e4 LT |
407 | { |
408 | int retval; | |
3a0f43e9 | 409 | |
372db8a7 TG |
410 | retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
411 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, | |
412 | value, 0, NULL, 0, 100); | |
441b62c1 | 413 | dbg("%s - value = %d, retval = %d", __func__, value, retval); |
1da177e4 LT |
414 | return retval; |
415 | } | |
416 | ||
1da177e4 LT |
417 | static void pl2303_send(struct usb_serial_port *port) |
418 | { | |
419 | int count, result; | |
420 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
421 | unsigned long flags; | |
422 | ||
441b62c1 | 423 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
424 | |
425 | spin_lock_irqsave(&priv->lock, flags); | |
426 | ||
427 | if (priv->write_urb_in_use) { | |
428 | spin_unlock_irqrestore(&priv->lock, flags); | |
429 | return; | |
430 | } | |
431 | ||
432 | count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer, | |
372db8a7 | 433 | port->bulk_out_size); |
1da177e4 LT |
434 | |
435 | if (count == 0) { | |
436 | spin_unlock_irqrestore(&priv->lock, flags); | |
437 | return; | |
438 | } | |
439 | ||
440 | priv->write_urb_in_use = 1; | |
441 | ||
442 | spin_unlock_irqrestore(&priv->lock, flags); | |
443 | ||
441b62c1 | 444 | usb_serial_debug_data(debug, &port->dev, __func__, count, |
372db8a7 | 445 | port->write_urb->transfer_buffer); |
1da177e4 LT |
446 | |
447 | port->write_urb->transfer_buffer_length = count; | |
448 | port->write_urb->dev = port->serial->dev; | |
372db8a7 | 449 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1da177e4 | 450 | if (result) { |
372db8a7 | 451 | dev_err(&port->dev, "%s - failed submitting write urb," |
441b62c1 | 452 | " error %d\n", __func__, result); |
1da177e4 | 453 | priv->write_urb_in_use = 0; |
3a0f43e9 | 454 | /* TODO: reschedule pl2303_send */ |
1da177e4 LT |
455 | } |
456 | ||
cf2c7481 | 457 | usb_serial_port_softint(port); |
1da177e4 LT |
458 | } |
459 | ||
95da310e AC |
460 | static int pl2303_write(struct tty_struct *tty, struct usb_serial_port *port, |
461 | const unsigned char *buf, int count) | |
572d3138 TG |
462 | { |
463 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
464 | unsigned long flags; | |
465 | ||
441b62c1 | 466 | dbg("%s - port %d, %d bytes", __func__, port->number, count); |
572d3138 TG |
467 | |
468 | if (!count) | |
469 | return count; | |
470 | ||
471 | spin_lock_irqsave(&priv->lock, flags); | |
472 | count = pl2303_buf_put(priv->buf, buf, count); | |
473 | spin_unlock_irqrestore(&priv->lock, flags); | |
474 | ||
475 | pl2303_send(port); | |
476 | ||
477 | return count; | |
478 | } | |
479 | ||
95da310e | 480 | static int pl2303_write_room(struct tty_struct *tty) |
1da177e4 | 481 | { |
95da310e | 482 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
483 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
484 | int room = 0; | |
485 | unsigned long flags; | |
486 | ||
441b62c1 | 487 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
488 | |
489 | spin_lock_irqsave(&priv->lock, flags); | |
490 | room = pl2303_buf_space_avail(priv->buf); | |
491 | spin_unlock_irqrestore(&priv->lock, flags); | |
492 | ||
441b62c1 | 493 | dbg("%s - returns %d", __func__, room); |
1da177e4 LT |
494 | return room; |
495 | } | |
496 | ||
95da310e | 497 | static int pl2303_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 498 | { |
95da310e | 499 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
500 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
501 | int chars = 0; | |
502 | unsigned long flags; | |
503 | ||
441b62c1 | 504 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
505 | |
506 | spin_lock_irqsave(&priv->lock, flags); | |
507 | chars = pl2303_buf_data_avail(priv->buf); | |
508 | spin_unlock_irqrestore(&priv->lock, flags); | |
509 | ||
441b62c1 | 510 | dbg("%s - returns %d", __func__, chars); |
1da177e4 LT |
511 | return chars; |
512 | } | |
513 | ||
95da310e AC |
514 | static void pl2303_set_termios(struct tty_struct *tty, |
515 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
516 | { |
517 | struct usb_serial *serial = port->serial; | |
518 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
519 | unsigned long flags; | |
520 | unsigned int cflag; | |
521 | unsigned char *buf; | |
522 | int baud; | |
523 | int i; | |
524 | u8 control; | |
525 | ||
441b62c1 | 526 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 527 | |
bf5e5834 AC |
528 | /* The PL2303 is reported to lose bytes if you change |
529 | serial settings even to the same values as before. Thus | |
530 | we actually need to filter in this specific case */ | |
531 | ||
95da310e | 532 | if (!tty_termios_hw_change(tty->termios, old_termios)) |
bf5e5834 AC |
533 | return; |
534 | ||
95da310e | 535 | cflag = tty->termios->c_cflag; |
1da177e4 | 536 | |
372db8a7 | 537 | buf = kzalloc(7, GFP_KERNEL); |
1da177e4 | 538 | if (!buf) { |
441b62c1 | 539 | dev_err(&port->dev, "%s - out of memory.\n", __func__); |
a5b6f60c | 540 | /* Report back no change occurred */ |
95da310e | 541 | *tty->termios = *old_termios; |
1da177e4 LT |
542 | return; |
543 | } | |
1da177e4 | 544 | |
372db8a7 TG |
545 | i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
546 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
547 | 0, 0, buf, 7, 100); | |
548 | dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, | |
549 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); | |
1da177e4 LT |
550 | |
551 | if (cflag & CSIZE) { | |
552 | switch (cflag & CSIZE) { | |
3a0f43e9 AC |
553 | case CS5: |
554 | buf[6] = 5; | |
555 | break; | |
556 | case CS6: | |
557 | buf[6] = 6; | |
558 | break; | |
559 | case CS7: | |
560 | buf[6] = 7; | |
561 | break; | |
562 | default: | |
563 | case CS8: | |
564 | buf[6] = 8; | |
565 | break; | |
1da177e4 | 566 | } |
441b62c1 | 567 | dbg("%s - data bits = %d", __func__, buf[6]); |
1da177e4 LT |
568 | } |
569 | ||
95da310e | 570 | baud = tty_get_baud_rate(tty); |
441b62c1 | 571 | dbg("%s - baud = %d", __func__, baud); |
1da177e4 LT |
572 | if (baud) { |
573 | buf[0] = baud & 0xff; | |
574 | buf[1] = (baud >> 8) & 0xff; | |
575 | buf[2] = (baud >> 16) & 0xff; | |
576 | buf[3] = (baud >> 24) & 0xff; | |
577 | } | |
578 | ||
579 | /* For reference buf[4]=0 is 1 stop bits */ | |
580 | /* For reference buf[4]=1 is 1.5 stop bits */ | |
581 | /* For reference buf[4]=2 is 2 stop bits */ | |
582 | if (cflag & CSTOPB) { | |
583 | buf[4] = 2; | |
441b62c1 | 584 | dbg("%s - stop bits = 2", __func__); |
1da177e4 LT |
585 | } else { |
586 | buf[4] = 0; | |
441b62c1 | 587 | dbg("%s - stop bits = 1", __func__); |
1da177e4 LT |
588 | } |
589 | ||
590 | if (cflag & PARENB) { | |
591 | /* For reference buf[5]=0 is none parity */ | |
592 | /* For reference buf[5]=1 is odd parity */ | |
593 | /* For reference buf[5]=2 is even parity */ | |
594 | /* For reference buf[5]=3 is mark parity */ | |
595 | /* For reference buf[5]=4 is space parity */ | |
596 | if (cflag & PARODD) { | |
597 | buf[5] = 1; | |
441b62c1 | 598 | dbg("%s - parity = odd", __func__); |
1da177e4 LT |
599 | } else { |
600 | buf[5] = 2; | |
441b62c1 | 601 | dbg("%s - parity = even", __func__); |
1da177e4 LT |
602 | } |
603 | } else { | |
604 | buf[5] = 0; | |
441b62c1 | 605 | dbg("%s - parity = none", __func__); |
1da177e4 LT |
606 | } |
607 | ||
372db8a7 TG |
608 | i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
609 | SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, | |
610 | 0, 0, buf, 7, 100); | |
611 | dbg("0x21:0x20:0:0 %d", i); | |
1da177e4 LT |
612 | |
613 | /* change control lines if we are switching to or from B0 */ | |
614 | spin_lock_irqsave(&priv->lock, flags); | |
615 | control = priv->line_control; | |
616 | if ((cflag & CBAUD) == B0) | |
617 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
618 | else | |
619 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
620 | if (control != priv->line_control) { | |
621 | control = priv->line_control; | |
622 | spin_unlock_irqrestore(&priv->lock, flags); | |
623 | set_control_lines(serial->dev, control); | |
624 | } else { | |
625 | spin_unlock_irqrestore(&priv->lock, flags); | |
626 | } | |
372db8a7 | 627 | |
1da177e4 LT |
628 | buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0; |
629 | ||
372db8a7 TG |
630 | i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
631 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
632 | 0, 0, buf, 7, 100); | |
633 | dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, | |
1da177e4 LT |
634 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); |
635 | ||
636 | if (cflag & CRTSCTS) { | |
1da177e4 | 637 | if (priv->type == HX) |
eb44da0b | 638 | pl2303_vendor_write(0x0, 0x61, serial); |
1da177e4 | 639 | else |
eb44da0b | 640 | pl2303_vendor_write(0x0, 0x41, serial); |
715f9527 | 641 | } else { |
eb44da0b | 642 | pl2303_vendor_write(0x0, 0x0, serial); |
1da177e4 | 643 | } |
572d3138 | 644 | |
df64c471 AC |
645 | /* FIXME: Need to read back resulting baud rate */ |
646 | if (baud) | |
95da310e | 647 | tty_encode_baud_rate(tty, baud, baud); |
df64c471 | 648 | |
572d3138 TG |
649 | kfree(buf); |
650 | } | |
651 | ||
95da310e AC |
652 | static void pl2303_close(struct tty_struct *tty, |
653 | struct usb_serial_port *port, struct file *filp) | |
572d3138 TG |
654 | { |
655 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
656 | unsigned long flags; | |
657 | unsigned int c_cflag; | |
658 | int bps; | |
659 | long timeout; | |
660 | wait_queue_t wait; | |
661 | ||
441b62c1 | 662 | dbg("%s - port %d", __func__, port->number); |
572d3138 TG |
663 | |
664 | /* wait for data to drain from the buffer */ | |
665 | spin_lock_irqsave(&priv->lock, flags); | |
666 | timeout = PL2303_CLOSING_WAIT; | |
667 | init_waitqueue_entry(&wait, current); | |
95da310e | 668 | add_wait_queue(&tty->write_wait, &wait); |
572d3138 TG |
669 | for (;;) { |
670 | set_current_state(TASK_INTERRUPTIBLE); | |
671 | if (pl2303_buf_data_avail(priv->buf) == 0 || | |
672 | timeout == 0 || signal_pending(current) || | |
0915f490 | 673 | port->serial->disconnected) |
572d3138 TG |
674 | break; |
675 | spin_unlock_irqrestore(&priv->lock, flags); | |
676 | timeout = schedule_timeout(timeout); | |
677 | spin_lock_irqsave(&priv->lock, flags); | |
678 | } | |
679 | set_current_state(TASK_RUNNING); | |
95da310e | 680 | remove_wait_queue(&tty->write_wait, &wait); |
572d3138 TG |
681 | /* clear out any remaining data in the buffer */ |
682 | pl2303_buf_clear(priv->buf); | |
683 | spin_unlock_irqrestore(&priv->lock, flags); | |
684 | ||
685 | /* wait for characters to drain from the device */ | |
686 | /* (this is long enough for the entire 256 byte */ | |
687 | /* pl2303 hardware buffer to drain with no flow */ | |
688 | /* control for data rates of 1200 bps or more, */ | |
689 | /* for lower rates we should really know how much */ | |
690 | /* data is in the buffer to compute a delay */ | |
691 | /* that is not unnecessarily long) */ | |
95da310e | 692 | bps = tty_get_baud_rate(tty); |
572d3138 | 693 | if (bps > 1200) |
3a0f43e9 | 694 | timeout = max((HZ*2560)/bps, HZ/10); |
572d3138 TG |
695 | else |
696 | timeout = 2*HZ; | |
697 | schedule_timeout_interruptible(timeout); | |
698 | ||
699 | /* shutdown our urbs */ | |
441b62c1 | 700 | dbg("%s - shutting down urbs", __func__); |
572d3138 TG |
701 | usb_kill_urb(port->write_urb); |
702 | usb_kill_urb(port->read_urb); | |
703 | usb_kill_urb(port->interrupt_in_urb); | |
704 | ||
95da310e AC |
705 | if (tty) { |
706 | c_cflag = tty->termios->c_cflag; | |
572d3138 TG |
707 | if (c_cflag & HUPCL) { |
708 | /* drop DTR and RTS */ | |
709 | spin_lock_irqsave(&priv->lock, flags); | |
710 | priv->line_control = 0; | |
711 | spin_unlock_irqrestore(&priv->lock, flags); | |
712 | set_control_lines(port->serial->dev, 0); | |
713 | } | |
714 | } | |
1da177e4 LT |
715 | } |
716 | ||
95da310e AC |
717 | static int pl2303_open(struct tty_struct *tty, |
718 | struct usb_serial_port *port, struct file *filp) | |
1da177e4 | 719 | { |
606d099c | 720 | struct ktermios tmp_termios; |
1da177e4 LT |
721 | struct usb_serial *serial = port->serial; |
722 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
1da177e4 LT |
723 | int result; |
724 | ||
441b62c1 | 725 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 726 | |
1694899f D |
727 | if (priv->type != HX) { |
728 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
729 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
3e152505 | 730 | } else { |
1da177e4 | 731 | /* reset upstream data pipes */ |
eb44da0b SS |
732 | pl2303_vendor_write(8, 0, serial); |
733 | pl2303_vendor_write(9, 0, serial); | |
1da177e4 LT |
734 | } |
735 | ||
1da177e4 | 736 | /* Setup termios */ |
95da310e AC |
737 | if (tty) |
738 | pl2303_set_termios(tty, port, &tmp_termios); | |
1da177e4 | 739 | |
3a0f43e9 | 740 | /* FIXME: need to assert RTS and DTR if CRTSCTS off */ |
1da177e4 | 741 | |
441b62c1 | 742 | dbg("%s - submitting read urb", __func__); |
1da177e4 | 743 | port->read_urb->dev = serial->dev; |
372db8a7 | 744 | result = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1da177e4 | 745 | if (result) { |
372db8a7 | 746 | dev_err(&port->dev, "%s - failed submitting read urb," |
441b62c1 | 747 | " error %d\n", __func__, result); |
95da310e | 748 | pl2303_close(tty, port, NULL); |
1da177e4 LT |
749 | return -EPROTO; |
750 | } | |
751 | ||
441b62c1 | 752 | dbg("%s - submitting interrupt urb", __func__); |
1da177e4 | 753 | port->interrupt_in_urb->dev = serial->dev; |
372db8a7 | 754 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
1da177e4 | 755 | if (result) { |
372db8a7 | 756 | dev_err(&port->dev, "%s - failed submitting interrupt urb," |
441b62c1 | 757 | " error %d\n", __func__, result); |
95da310e | 758 | pl2303_close(tty, port, NULL); |
1da177e4 LT |
759 | return -EPROTO; |
760 | } | |
761 | return 0; | |
762 | } | |
763 | ||
95da310e | 764 | static int pl2303_tiocmset(struct tty_struct *tty, struct file *file, |
372db8a7 | 765 | unsigned int set, unsigned int clear) |
1da177e4 | 766 | { |
95da310e | 767 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
768 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
769 | unsigned long flags; | |
770 | u8 control; | |
771 | ||
6fdd8e8e FL |
772 | if (!usb_get_intfdata(port->serial->interface)) |
773 | return -ENODEV; | |
774 | ||
372db8a7 | 775 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
776 | if (set & TIOCM_RTS) |
777 | priv->line_control |= CONTROL_RTS; | |
778 | if (set & TIOCM_DTR) | |
779 | priv->line_control |= CONTROL_DTR; | |
780 | if (clear & TIOCM_RTS) | |
781 | priv->line_control &= ~CONTROL_RTS; | |
782 | if (clear & TIOCM_DTR) | |
783 | priv->line_control &= ~CONTROL_DTR; | |
784 | control = priv->line_control; | |
372db8a7 | 785 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 786 | |
372db8a7 | 787 | return set_control_lines(port->serial->dev, control); |
1da177e4 LT |
788 | } |
789 | ||
95da310e | 790 | static int pl2303_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 791 | { |
95da310e | 792 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
793 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
794 | unsigned long flags; | |
795 | unsigned int mcr; | |
796 | unsigned int status; | |
797 | unsigned int result; | |
798 | ||
441b62c1 | 799 | dbg("%s (%d)", __func__, port->number); |
1da177e4 | 800 | |
6fdd8e8e FL |
801 | if (!usb_get_intfdata(port->serial->interface)) |
802 | return -ENODEV; | |
803 | ||
372db8a7 | 804 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
805 | mcr = priv->line_control; |
806 | status = priv->line_status; | |
372db8a7 | 807 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
808 | |
809 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) | |
810 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) | |
811 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
812 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
813 | | ((status & UART_RING) ? TIOCM_RI : 0) | |
814 | | ((status & UART_DCD) ? TIOCM_CD : 0); | |
815 | ||
441b62c1 | 816 | dbg("%s - result = %x", __func__, result); |
1da177e4 LT |
817 | |
818 | return result; | |
819 | } | |
820 | ||
821 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) | |
822 | { | |
823 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
824 | unsigned long flags; | |
825 | unsigned int prevstatus; | |
826 | unsigned int status; | |
827 | unsigned int changed; | |
828 | ||
372db8a7 | 829 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 830 | prevstatus = priv->line_status; |
372db8a7 | 831 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
832 | |
833 | while (1) { | |
834 | interruptible_sleep_on(&priv->delta_msr_wait); | |
835 | /* see if a signal did it */ | |
836 | if (signal_pending(current)) | |
837 | return -ERESTARTSYS; | |
372db8a7 TG |
838 | |
839 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 840 | status = priv->line_status; |
372db8a7 TG |
841 | spin_unlock_irqrestore(&priv->lock, flags); |
842 | ||
3a0f43e9 | 843 | changed = prevstatus ^ status; |
372db8a7 | 844 | |
1da177e4 LT |
845 | if (((arg & TIOCM_RNG) && (changed & UART_RING)) || |
846 | ((arg & TIOCM_DSR) && (changed & UART_DSR)) || | |
847 | ((arg & TIOCM_CD) && (changed & UART_DCD)) || | |
3a0f43e9 | 848 | ((arg & TIOCM_CTS) && (changed & UART_CTS))) { |
1da177e4 LT |
849 | return 0; |
850 | } | |
851 | prevstatus = status; | |
852 | } | |
853 | /* NOTREACHED */ | |
854 | return 0; | |
855 | } | |
856 | ||
95da310e | 857 | static int pl2303_ioctl(struct tty_struct *tty, struct file *file, |
372db8a7 | 858 | unsigned int cmd, unsigned long arg) |
1da177e4 | 859 | { |
95da310e | 860 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 861 | dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); |
1da177e4 LT |
862 | |
863 | switch (cmd) { | |
3a0f43e9 AC |
864 | case TIOCMIWAIT: |
865 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); | |
866 | return wait_modem_info(port, arg); | |
867 | default: | |
868 | dbg("%s not supported = 0x%04x", __func__, cmd); | |
869 | break; | |
1da177e4 | 870 | } |
1da177e4 LT |
871 | return -ENOIOCTLCMD; |
872 | } | |
873 | ||
95da310e | 874 | static void pl2303_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 875 | { |
95da310e | 876 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
877 | struct usb_serial *serial = port->serial; |
878 | u16 state; | |
879 | int result; | |
880 | ||
441b62c1 | 881 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
882 | |
883 | if (break_state == 0) | |
884 | state = BREAK_OFF; | |
885 | else | |
886 | state = BREAK_ON; | |
3a0f43e9 AC |
887 | dbg("%s - turning break %s", __func__, |
888 | state == BREAK_OFF ? "off" : "on"); | |
1da177e4 | 889 | |
372db8a7 TG |
890 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
891 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, | |
892 | 0, NULL, 0, 100); | |
1da177e4 | 893 | if (result) |
441b62c1 | 894 | dbg("%s - error sending break = %d", __func__, result); |
1da177e4 LT |
895 | } |
896 | ||
372db8a7 | 897 | static void pl2303_shutdown(struct usb_serial *serial) |
1da177e4 LT |
898 | { |
899 | int i; | |
900 | struct pl2303_private *priv; | |
901 | ||
441b62c1 | 902 | dbg("%s", __func__); |
1da177e4 LT |
903 | |
904 | for (i = 0; i < serial->num_ports; ++i) { | |
905 | priv = usb_get_serial_port_data(serial->port[i]); | |
906 | if (priv) { | |
907 | pl2303_buf_free(priv->buf); | |
908 | kfree(priv); | |
909 | usb_set_serial_port_data(serial->port[i], NULL); | |
910 | } | |
372db8a7 | 911 | } |
1da177e4 LT |
912 | } |
913 | ||
97bb13ec FL |
914 | static void pl2303_update_line_status(struct usb_serial_port *port, |
915 | unsigned char *data, | |
916 | unsigned int actual_length) | |
917 | { | |
918 | ||
919 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
920 | unsigned long flags; | |
921 | u8 status_idx = UART_STATE; | |
95f209f9 | 922 | u8 length = UART_STATE + 1; |
9c537616 | 923 | u16 idv, idp; |
97bb13ec | 924 | |
9c537616 TG |
925 | idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); |
926 | idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); | |
927 | ||
928 | ||
929 | if (idv == SIEMENS_VENDOR_ID) { | |
930 | if (idp == SIEMENS_PRODUCT_ID_X65 || | |
931 | idp == SIEMENS_PRODUCT_ID_SX1 || | |
932 | idp == SIEMENS_PRODUCT_ID_X75) { | |
933 | ||
934 | length = 1; | |
935 | status_idx = 0; | |
936 | } | |
97bb13ec FL |
937 | } |
938 | ||
939 | if (actual_length < length) | |
a009b75a | 940 | return; |
97bb13ec | 941 | |
3a0f43e9 | 942 | /* Save off the uart status for others to look at */ |
97bb13ec FL |
943 | spin_lock_irqsave(&priv->lock, flags); |
944 | priv->line_status = data[status_idx]; | |
945 | spin_unlock_irqrestore(&priv->lock, flags); | |
372db8a7 | 946 | wake_up_interruptible(&priv->delta_msr_wait); |
97bb13ec | 947 | } |
1da177e4 | 948 | |
7d12e780 | 949 | static void pl2303_read_int_callback(struct urb *urb) |
1da177e4 | 950 | { |
cdc97792 | 951 | struct usb_serial_port *port = urb->context; |
1da177e4 | 952 | unsigned char *data = urb->transfer_buffer; |
97bb13ec | 953 | unsigned int actual_length = urb->actual_length; |
461d696a GKH |
954 | int status = urb->status; |
955 | int retval; | |
1da177e4 | 956 | |
441b62c1 | 957 | dbg("%s (%d)", __func__, port->number); |
1da177e4 | 958 | |
461d696a | 959 | switch (status) { |
1da177e4 LT |
960 | case 0: |
961 | /* success */ | |
962 | break; | |
963 | case -ECONNRESET: | |
964 | case -ENOENT: | |
965 | case -ESHUTDOWN: | |
966 | /* this urb is terminated, clean up */ | |
441b62c1 | 967 | dbg("%s - urb shutting down with status: %d", __func__, |
461d696a | 968 | status); |
1da177e4 LT |
969 | return; |
970 | default: | |
441b62c1 | 971 | dbg("%s - nonzero urb status received: %d", __func__, |
461d696a | 972 | status); |
1da177e4 LT |
973 | goto exit; |
974 | } | |
975 | ||
441b62c1 | 976 | usb_serial_debug_data(debug, &port->dev, __func__, |
372db8a7 TG |
977 | urb->actual_length, urb->transfer_buffer); |
978 | ||
97bb13ec | 979 | pl2303_update_line_status(port, data, actual_length); |
1da177e4 | 980 | |
1da177e4 | 981 | exit: |
461d696a GKH |
982 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
983 | if (retval) | |
372db8a7 TG |
984 | dev_err(&urb->dev->dev, |
985 | "%s - usb_submit_urb failed with result %d\n", | |
441b62c1 | 986 | __func__, retval); |
1da177e4 LT |
987 | } |
988 | ||
7d12e780 | 989 | static void pl2303_read_bulk_callback(struct urb *urb) |
1da177e4 | 990 | { |
cdc97792 | 991 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
992 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
993 | struct tty_struct *tty; | |
994 | unsigned char *data = urb->transfer_buffer; | |
995 | unsigned long flags; | |
996 | int i; | |
997 | int result; | |
461d696a GKH |
998 | int status = urb->status; |
999 | u8 line_status; | |
1da177e4 LT |
1000 | char tty_flag; |
1001 | ||
441b62c1 | 1002 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1003 | |
461d696a | 1004 | if (status) { |
441b62c1 | 1005 | dbg("%s - urb status = %d", __func__, status); |
95da310e | 1006 | if (!port->port.count) { |
441b62c1 | 1007 | dbg("%s - port is closed, exiting.", __func__); |
1da177e4 LT |
1008 | return; |
1009 | } | |
461d696a | 1010 | if (status == -EPROTO) { |
372db8a7 TG |
1011 | /* PL2303 mysteriously fails with -EPROTO reschedule |
1012 | * the read */ | |
1013 | dbg("%s - caught -EPROTO, resubmitting the urb", | |
441b62c1 | 1014 | __func__); |
1da177e4 LT |
1015 | urb->dev = port->serial->dev; |
1016 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1017 | if (result) | |
372db8a7 TG |
1018 | dev_err(&urb->dev->dev, "%s - failed" |
1019 | " resubmitting read urb, error %d\n", | |
441b62c1 | 1020 | __func__, result); |
1da177e4 LT |
1021 | return; |
1022 | } | |
441b62c1 | 1023 | dbg("%s - unable to handle the error, exiting.", __func__); |
1da177e4 LT |
1024 | return; |
1025 | } | |
1026 | ||
441b62c1 | 1027 | usb_serial_debug_data(debug, &port->dev, __func__, |
372db8a7 | 1028 | urb->actual_length, data); |
1da177e4 LT |
1029 | |
1030 | /* get tty_flag from status */ | |
1031 | tty_flag = TTY_NORMAL; | |
1032 | ||
1033 | spin_lock_irqsave(&priv->lock, flags); | |
461d696a | 1034 | line_status = priv->line_status; |
1da177e4 LT |
1035 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; |
1036 | spin_unlock_irqrestore(&priv->lock, flags); | |
372db8a7 | 1037 | wake_up_interruptible(&priv->delta_msr_wait); |
1da177e4 LT |
1038 | |
1039 | /* break takes precedence over parity, */ | |
1040 | /* which takes precedence over framing errors */ | |
3a0f43e9 | 1041 | if (line_status & UART_BREAK_ERROR) |
1da177e4 | 1042 | tty_flag = TTY_BREAK; |
461d696a | 1043 | else if (line_status & UART_PARITY_ERROR) |
1da177e4 | 1044 | tty_flag = TTY_PARITY; |
461d696a | 1045 | else if (line_status & UART_FRAME_ERROR) |
1da177e4 | 1046 | tty_flag = TTY_FRAME; |
441b62c1 | 1047 | dbg("%s - tty_flag = %d", __func__, tty_flag); |
1da177e4 | 1048 | |
4a90f09b | 1049 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1050 | if (tty && urb->actual_length) { |
33f0f88f | 1051 | tty_buffer_request_room(tty, urb->actual_length + 1); |
1da177e4 | 1052 | /* overrun is special, not associated with a char */ |
461d696a | 1053 | if (line_status & UART_OVERRUN_ERROR) |
1da177e4 | 1054 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
33f0f88f | 1055 | for (i = 0; i < urb->actual_length; ++i) |
372db8a7 TG |
1056 | tty_insert_flip_char(tty, data[i], tty_flag); |
1057 | tty_flip_buffer_push(tty); | |
1da177e4 | 1058 | } |
4a90f09b | 1059 | tty_kref_put(tty); |
1da177e4 | 1060 | /* Schedule the next read _if_ we are still open */ |
95da310e | 1061 | if (port->port.count) { |
1da177e4 LT |
1062 | urb->dev = port->serial->dev; |
1063 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1064 | if (result) | |
372db8a7 | 1065 | dev_err(&urb->dev->dev, "%s - failed resubmitting" |
441b62c1 | 1066 | " read urb, error %d\n", __func__, result); |
1da177e4 LT |
1067 | } |
1068 | ||
1069 | return; | |
1070 | } | |
1071 | ||
7d12e780 | 1072 | static void pl2303_write_bulk_callback(struct urb *urb) |
1da177e4 | 1073 | { |
cdc97792 | 1074 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1075 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
1076 | int result; | |
461d696a | 1077 | int status = urb->status; |
1da177e4 | 1078 | |
441b62c1 | 1079 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1080 | |
461d696a | 1081 | switch (status) { |
1da177e4 LT |
1082 | case 0: |
1083 | /* success */ | |
1084 | break; | |
1085 | case -ECONNRESET: | |
1086 | case -ENOENT: | |
1087 | case -ESHUTDOWN: | |
1088 | /* this urb is terminated, clean up */ | |
441b62c1 | 1089 | dbg("%s - urb shutting down with status: %d", __func__, |
461d696a | 1090 | status); |
1da177e4 LT |
1091 | priv->write_urb_in_use = 0; |
1092 | return; | |
1093 | default: | |
1094 | /* error in the urb, so we have to resubmit it */ | |
441b62c1 HH |
1095 | dbg("%s - Overflow in write", __func__); |
1096 | dbg("%s - nonzero write bulk status received: %d", __func__, | |
461d696a | 1097 | status); |
1da177e4 LT |
1098 | port->write_urb->transfer_buffer_length = 1; |
1099 | port->write_urb->dev = port->serial->dev; | |
372db8a7 | 1100 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1da177e4 | 1101 | if (result) |
372db8a7 | 1102 | dev_err(&urb->dev->dev, "%s - failed resubmitting write" |
441b62c1 | 1103 | " urb, error %d\n", __func__, result); |
1da177e4 LT |
1104 | else |
1105 | return; | |
1106 | } | |
1107 | ||
1108 | priv->write_urb_in_use = 0; | |
1109 | ||
1110 | /* send any buffered data */ | |
1111 | pl2303_send(port); | |
1112 | } | |
1113 | ||
572d3138 TG |
1114 | /* All of the device info needed for the PL2303 SIO serial converter */ |
1115 | static struct usb_serial_driver pl2303_device = { | |
1116 | .driver = { | |
1117 | .owner = THIS_MODULE, | |
1118 | .name = "pl2303", | |
1119 | }, | |
1120 | .id_table = id_table, | |
d9b1b787 | 1121 | .usb_driver = &pl2303_driver, |
572d3138 TG |
1122 | .num_ports = 1, |
1123 | .open = pl2303_open, | |
1124 | .close = pl2303_close, | |
1125 | .write = pl2303_write, | |
1126 | .ioctl = pl2303_ioctl, | |
1127 | .break_ctl = pl2303_break_ctl, | |
1128 | .set_termios = pl2303_set_termios, | |
1129 | .tiocmget = pl2303_tiocmget, | |
1130 | .tiocmset = pl2303_tiocmset, | |
1131 | .read_bulk_callback = pl2303_read_bulk_callback, | |
1132 | .read_int_callback = pl2303_read_int_callback, | |
1133 | .write_bulk_callback = pl2303_write_bulk_callback, | |
1134 | .write_room = pl2303_write_room, | |
1135 | .chars_in_buffer = pl2303_chars_in_buffer, | |
1136 | .attach = pl2303_startup, | |
1137 | .shutdown = pl2303_shutdown, | |
1138 | }; | |
1da177e4 | 1139 | |
372db8a7 | 1140 | static int __init pl2303_init(void) |
1da177e4 LT |
1141 | { |
1142 | int retval; | |
372db8a7 | 1143 | |
1da177e4 LT |
1144 | retval = usb_serial_register(&pl2303_device); |
1145 | if (retval) | |
1146 | goto failed_usb_serial_register; | |
1147 | retval = usb_register(&pl2303_driver); | |
1148 | if (retval) | |
1149 | goto failed_usb_register; | |
17a882fc | 1150 | info(DRIVER_DESC); |
1da177e4 LT |
1151 | return 0; |
1152 | failed_usb_register: | |
1153 | usb_serial_deregister(&pl2303_device); | |
1154 | failed_usb_serial_register: | |
1155 | return retval; | |
1156 | } | |
1157 | ||
372db8a7 | 1158 | static void __exit pl2303_exit(void) |
1da177e4 | 1159 | { |
372db8a7 TG |
1160 | usb_deregister(&pl2303_driver); |
1161 | usb_serial_deregister(&pl2303_device); | |
1da177e4 LT |
1162 | } |
1163 | ||
1da177e4 LT |
1164 | module_init(pl2303_init); |
1165 | module_exit(pl2303_exit); | |
1166 | ||
1167 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1168 | MODULE_LICENSE("GPL"); |
1169 | ||
1170 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1171 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1172 |