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Commit | Line | Data |
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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) }, |
912299f6 | 82 | { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ |
acbb36f1 | 83 | { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, |
c6c27721 CL |
84 | { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, |
85 | { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, | |
6cceb05f | 86 | { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, |
c6c27721 | 87 | { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, |
491b04ce | 88 | { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, |
3b928474 | 89 | { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, |
b7aa94b6 | 90 | { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, |
8fd80133 | 91 | { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, |
2d94b981 | 92 | { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, |
9e3285db | 93 | { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, |
cc311ee7 | 94 | { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, |
7c992001 | 95 | { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, |
af4b8514 | 96 | { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, |
1da177e4 LT |
97 | { } /* Terminating entry */ |
98 | }; | |
99 | ||
372db8a7 | 100 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 LT |
101 | |
102 | static struct usb_driver pl2303_driver = { | |
1da177e4 LT |
103 | .name = "pl2303", |
104 | .probe = usb_serial_probe, | |
105 | .disconnect = usb_serial_disconnect, | |
106 | .id_table = id_table, | |
fcf9e55e SS |
107 | .suspend = usb_serial_suspend, |
108 | .resume = usb_serial_resume, | |
ba9dc657 | 109 | .no_dynamic_id = 1, |
fcf9e55e | 110 | .supports_autosuspend = 1, |
1da177e4 LT |
111 | }; |
112 | ||
113 | #define SET_LINE_REQUEST_TYPE 0x21 | |
114 | #define SET_LINE_REQUEST 0x20 | |
115 | ||
116 | #define SET_CONTROL_REQUEST_TYPE 0x21 | |
117 | #define SET_CONTROL_REQUEST 0x22 | |
118 | #define CONTROL_DTR 0x01 | |
119 | #define CONTROL_RTS 0x02 | |
120 | ||
121 | #define BREAK_REQUEST_TYPE 0x21 | |
3a0f43e9 | 122 | #define BREAK_REQUEST 0x23 |
1da177e4 LT |
123 | #define BREAK_ON 0xffff |
124 | #define BREAK_OFF 0x0000 | |
125 | ||
126 | #define GET_LINE_REQUEST_TYPE 0xa1 | |
127 | #define GET_LINE_REQUEST 0x21 | |
128 | ||
129 | #define VENDOR_WRITE_REQUEST_TYPE 0x40 | |
130 | #define VENDOR_WRITE_REQUEST 0x01 | |
131 | ||
132 | #define VENDOR_READ_REQUEST_TYPE 0xc0 | |
133 | #define VENDOR_READ_REQUEST 0x01 | |
134 | ||
135 | #define UART_STATE 0x08 | |
136 | #define UART_STATE_TRANSIENT_MASK 0x74 | |
137 | #define UART_DCD 0x01 | |
138 | #define UART_DSR 0x02 | |
139 | #define UART_BREAK_ERROR 0x04 | |
140 | #define UART_RING 0x08 | |
141 | #define UART_FRAME_ERROR 0x10 | |
142 | #define UART_PARITY_ERROR 0x20 | |
143 | #define UART_OVERRUN_ERROR 0x40 | |
144 | #define UART_CTS 0x80 | |
145 | ||
1da177e4 LT |
146 | |
147 | enum pl2303_type { | |
148 | type_0, /* don't know the difference between type 0 and */ | |
149 | type_1, /* type 1, until someone from prolific tells us... */ | |
150 | HX, /* HX version of the pl2303 chip */ | |
151 | }; | |
152 | ||
153 | struct pl2303_private { | |
154 | spinlock_t lock; | |
155 | struct pl2303_buf *buf; | |
156 | int write_urb_in_use; | |
157 | wait_queue_head_t delta_msr_wait; | |
158 | u8 line_control; | |
159 | u8 line_status; | |
1da177e4 LT |
160 | enum pl2303_type type; |
161 | }; | |
162 | ||
572d3138 TG |
163 | /* |
164 | * pl2303_buf_alloc | |
165 | * | |
166 | * Allocate a circular buffer and all associated memory. | |
167 | */ | |
168 | static struct pl2303_buf *pl2303_buf_alloc(unsigned int size) | |
169 | { | |
170 | struct pl2303_buf *pb; | |
171 | ||
172 | if (size == 0) | |
173 | return NULL; | |
174 | ||
5cbded58 | 175 | pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL); |
572d3138 TG |
176 | if (pb == NULL) |
177 | return NULL; | |
178 | ||
179 | pb->buf_buf = kmalloc(size, GFP_KERNEL); | |
180 | if (pb->buf_buf == NULL) { | |
181 | kfree(pb); | |
182 | return NULL; | |
183 | } | |
184 | ||
185 | pb->buf_size = size; | |
186 | pb->buf_get = pb->buf_put = pb->buf_buf; | |
187 | ||
188 | return pb; | |
189 | } | |
190 | ||
191 | /* | |
192 | * pl2303_buf_free | |
193 | * | |
194 | * Free the buffer and all associated memory. | |
195 | */ | |
196 | static void pl2303_buf_free(struct pl2303_buf *pb) | |
197 | { | |
198 | if (pb) { | |
199 | kfree(pb->buf_buf); | |
200 | kfree(pb); | |
201 | } | |
202 | } | |
203 | ||
204 | /* | |
205 | * pl2303_buf_clear | |
206 | * | |
207 | * Clear out all data in the circular buffer. | |
208 | */ | |
209 | static void pl2303_buf_clear(struct pl2303_buf *pb) | |
210 | { | |
211 | if (pb != NULL) | |
212 | pb->buf_get = pb->buf_put; | |
213 | /* equivalent to a get of all data available */ | |
214 | } | |
215 | ||
216 | /* | |
217 | * pl2303_buf_data_avail | |
218 | * | |
219 | * Return the number of bytes of data available in the circular | |
220 | * buffer. | |
221 | */ | |
222 | static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb) | |
223 | { | |
224 | if (pb == NULL) | |
225 | return 0; | |
226 | ||
3a0f43e9 | 227 | return (pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size; |
572d3138 TG |
228 | } |
229 | ||
230 | /* | |
231 | * pl2303_buf_space_avail | |
232 | * | |
233 | * Return the number of bytes of space available in the circular | |
234 | * buffer. | |
235 | */ | |
236 | static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb) | |
237 | { | |
238 | if (pb == NULL) | |
239 | return 0; | |
240 | ||
3a0f43e9 | 241 | return (pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size; |
572d3138 TG |
242 | } |
243 | ||
244 | /* | |
245 | * pl2303_buf_put | |
246 | * | |
247 | * Copy data data from a user buffer and put it into the circular buffer. | |
248 | * Restrict to the amount of space available. | |
249 | * | |
250 | * Return the number of bytes copied. | |
251 | */ | |
252 | static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, | |
253 | unsigned int count) | |
254 | { | |
255 | unsigned int len; | |
256 | ||
257 | if (pb == NULL) | |
258 | return 0; | |
259 | ||
260 | len = pl2303_buf_space_avail(pb); | |
261 | if (count > len) | |
262 | count = len; | |
263 | ||
264 | if (count == 0) | |
265 | return 0; | |
266 | ||
267 | len = pb->buf_buf + pb->buf_size - pb->buf_put; | |
268 | if (count > len) { | |
269 | memcpy(pb->buf_put, buf, len); | |
270 | memcpy(pb->buf_buf, buf+len, count - len); | |
271 | pb->buf_put = pb->buf_buf + count - len; | |
272 | } else { | |
273 | memcpy(pb->buf_put, buf, count); | |
274 | if (count < len) | |
275 | pb->buf_put += count; | |
276 | else /* count == len */ | |
277 | pb->buf_put = pb->buf_buf; | |
278 | } | |
279 | ||
280 | return count; | |
281 | } | |
282 | ||
283 | /* | |
284 | * pl2303_buf_get | |
285 | * | |
286 | * Get data from the circular buffer and copy to the given buffer. | |
287 | * Restrict to the amount of data available. | |
288 | * | |
289 | * Return the number of bytes copied. | |
290 | */ | |
291 | static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, | |
292 | unsigned int count) | |
293 | { | |
294 | unsigned int len; | |
295 | ||
296 | if (pb == NULL) | |
297 | return 0; | |
298 | ||
299 | len = pl2303_buf_data_avail(pb); | |
300 | if (count > len) | |
301 | count = len; | |
302 | ||
303 | if (count == 0) | |
304 | return 0; | |
305 | ||
306 | len = pb->buf_buf + pb->buf_size - pb->buf_get; | |
307 | if (count > len) { | |
308 | memcpy(buf, pb->buf_get, len); | |
309 | memcpy(buf+len, pb->buf_buf, count - len); | |
310 | pb->buf_get = pb->buf_buf + count - len; | |
311 | } else { | |
312 | memcpy(buf, pb->buf_get, count); | |
313 | if (count < len) | |
314 | pb->buf_get += count; | |
315 | else /* count == len */ | |
316 | pb->buf_get = pb->buf_buf; | |
317 | } | |
318 | ||
319 | return count; | |
320 | } | |
1da177e4 | 321 | |
eb44da0b SS |
322 | static int pl2303_vendor_read(__u16 value, __u16 index, |
323 | struct usb_serial *serial, unsigned char *buf) | |
324 | { | |
325 | int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
326 | VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, | |
327 | value, index, buf, 1, 100); | |
328 | dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE, | |
329 | VENDOR_READ_REQUEST, value, index, res, buf[0]); | |
330 | return res; | |
331 | } | |
332 | ||
333 | static int pl2303_vendor_write(__u16 value, __u16 index, | |
334 | struct usb_serial *serial) | |
335 | { | |
336 | int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
337 | VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, | |
338 | value, index, NULL, 0, 100); | |
339 | dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE, | |
340 | VENDOR_WRITE_REQUEST, value, index, res); | |
341 | return res; | |
342 | } | |
343 | ||
372db8a7 | 344 | static int pl2303_startup(struct usb_serial *serial) |
1da177e4 LT |
345 | { |
346 | struct pl2303_private *priv; | |
347 | enum pl2303_type type = type_0; | |
3e152505 | 348 | unsigned char *buf; |
1da177e4 LT |
349 | int i; |
350 | ||
3e152505 SS |
351 | buf = kmalloc(10, GFP_KERNEL); |
352 | if (buf == NULL) | |
353 | return -ENOMEM; | |
354 | ||
1da177e4 LT |
355 | if (serial->dev->descriptor.bDeviceClass == 0x02) |
356 | type = type_0; | |
357 | else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) | |
358 | type = HX; | |
359 | else if (serial->dev->descriptor.bDeviceClass == 0x00) | |
360 | type = type_1; | |
361 | else if (serial->dev->descriptor.bDeviceClass == 0xFF) | |
362 | type = type_1; | |
363 | dbg("device type: %d", type); | |
364 | ||
365 | for (i = 0; i < serial->num_ports; ++i) { | |
80b6ca48 | 366 | priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL); |
1da177e4 LT |
367 | if (!priv) |
368 | goto cleanup; | |
1da177e4 LT |
369 | spin_lock_init(&priv->lock); |
370 | priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE); | |
371 | if (priv->buf == NULL) { | |
372 | kfree(priv); | |
373 | goto cleanup; | |
374 | } | |
375 | init_waitqueue_head(&priv->delta_msr_wait); | |
376 | priv->type = type; | |
377 | usb_set_serial_port_data(serial->port[i], priv); | |
378 | } | |
3e152505 SS |
379 | |
380 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
381 | pl2303_vendor_write(0x0404, 0, serial); | |
382 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
383 | pl2303_vendor_read(0x8383, 0, serial, buf); | |
384 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
385 | pl2303_vendor_write(0x0404, 1, serial); | |
386 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
387 | pl2303_vendor_read(0x8383, 0, serial, buf); | |
388 | pl2303_vendor_write(0, 1, serial); | |
389 | pl2303_vendor_write(1, 0, serial); | |
390 | if (type == HX) | |
391 | pl2303_vendor_write(2, 0x44, serial); | |
392 | else | |
393 | pl2303_vendor_write(2, 0x24, serial); | |
394 | ||
395 | kfree(buf); | |
1da177e4 LT |
396 | return 0; |
397 | ||
398 | cleanup: | |
3e152505 | 399 | kfree(buf); |
3a0f43e9 | 400 | for (--i; i >= 0; --i) { |
1da177e4 LT |
401 | priv = usb_get_serial_port_data(serial->port[i]); |
402 | pl2303_buf_free(priv->buf); | |
403 | kfree(priv); | |
404 | usb_set_serial_port_data(serial->port[i], NULL); | |
405 | } | |
406 | return -ENOMEM; | |
407 | } | |
408 | ||
372db8a7 | 409 | static int set_control_lines(struct usb_device *dev, u8 value) |
1da177e4 LT |
410 | { |
411 | int retval; | |
3a0f43e9 | 412 | |
372db8a7 TG |
413 | retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
414 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, | |
415 | value, 0, NULL, 0, 100); | |
441b62c1 | 416 | dbg("%s - value = %d, retval = %d", __func__, value, retval); |
1da177e4 LT |
417 | return retval; |
418 | } | |
419 | ||
1da177e4 LT |
420 | static void pl2303_send(struct usb_serial_port *port) |
421 | { | |
422 | int count, result; | |
423 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
424 | unsigned long flags; | |
425 | ||
441b62c1 | 426 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
427 | |
428 | spin_lock_irqsave(&priv->lock, flags); | |
429 | ||
430 | if (priv->write_urb_in_use) { | |
431 | spin_unlock_irqrestore(&priv->lock, flags); | |
432 | return; | |
433 | } | |
434 | ||
435 | count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer, | |
372db8a7 | 436 | port->bulk_out_size); |
1da177e4 LT |
437 | |
438 | if (count == 0) { | |
439 | spin_unlock_irqrestore(&priv->lock, flags); | |
440 | return; | |
441 | } | |
442 | ||
443 | priv->write_urb_in_use = 1; | |
444 | ||
445 | spin_unlock_irqrestore(&priv->lock, flags); | |
446 | ||
441b62c1 | 447 | usb_serial_debug_data(debug, &port->dev, __func__, count, |
372db8a7 | 448 | port->write_urb->transfer_buffer); |
1da177e4 LT |
449 | |
450 | port->write_urb->transfer_buffer_length = count; | |
451 | port->write_urb->dev = port->serial->dev; | |
372db8a7 | 452 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1da177e4 | 453 | if (result) { |
372db8a7 | 454 | dev_err(&port->dev, "%s - failed submitting write urb," |
441b62c1 | 455 | " error %d\n", __func__, result); |
1da177e4 | 456 | priv->write_urb_in_use = 0; |
3a0f43e9 | 457 | /* TODO: reschedule pl2303_send */ |
1da177e4 LT |
458 | } |
459 | ||
cf2c7481 | 460 | usb_serial_port_softint(port); |
1da177e4 LT |
461 | } |
462 | ||
95da310e AC |
463 | static int pl2303_write(struct tty_struct *tty, struct usb_serial_port *port, |
464 | const unsigned char *buf, int count) | |
572d3138 TG |
465 | { |
466 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
467 | unsigned long flags; | |
468 | ||
441b62c1 | 469 | dbg("%s - port %d, %d bytes", __func__, port->number, count); |
572d3138 TG |
470 | |
471 | if (!count) | |
472 | return count; | |
473 | ||
474 | spin_lock_irqsave(&priv->lock, flags); | |
475 | count = pl2303_buf_put(priv->buf, buf, count); | |
476 | spin_unlock_irqrestore(&priv->lock, flags); | |
477 | ||
478 | pl2303_send(port); | |
479 | ||
480 | return count; | |
481 | } | |
482 | ||
95da310e | 483 | static int pl2303_write_room(struct tty_struct *tty) |
1da177e4 | 484 | { |
95da310e | 485 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
486 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
487 | int room = 0; | |
488 | unsigned long flags; | |
489 | ||
441b62c1 | 490 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
491 | |
492 | spin_lock_irqsave(&priv->lock, flags); | |
493 | room = pl2303_buf_space_avail(priv->buf); | |
494 | spin_unlock_irqrestore(&priv->lock, flags); | |
495 | ||
441b62c1 | 496 | dbg("%s - returns %d", __func__, room); |
1da177e4 LT |
497 | return room; |
498 | } | |
499 | ||
95da310e | 500 | static int pl2303_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 501 | { |
95da310e | 502 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
503 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
504 | int chars = 0; | |
505 | unsigned long flags; | |
506 | ||
441b62c1 | 507 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
508 | |
509 | spin_lock_irqsave(&priv->lock, flags); | |
510 | chars = pl2303_buf_data_avail(priv->buf); | |
511 | spin_unlock_irqrestore(&priv->lock, flags); | |
512 | ||
441b62c1 | 513 | dbg("%s - returns %d", __func__, chars); |
1da177e4 LT |
514 | return chars; |
515 | } | |
516 | ||
95da310e AC |
517 | static void pl2303_set_termios(struct tty_struct *tty, |
518 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
519 | { |
520 | struct usb_serial *serial = port->serial; | |
521 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
522 | unsigned long flags; | |
523 | unsigned int cflag; | |
524 | unsigned char *buf; | |
525 | int baud; | |
526 | int i; | |
527 | u8 control; | |
528 | ||
441b62c1 | 529 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 530 | |
bf5e5834 AC |
531 | /* The PL2303 is reported to lose bytes if you change |
532 | serial settings even to the same values as before. Thus | |
533 | we actually need to filter in this specific case */ | |
534 | ||
95da310e | 535 | if (!tty_termios_hw_change(tty->termios, old_termios)) |
bf5e5834 AC |
536 | return; |
537 | ||
95da310e | 538 | cflag = tty->termios->c_cflag; |
1da177e4 | 539 | |
372db8a7 | 540 | buf = kzalloc(7, GFP_KERNEL); |
1da177e4 | 541 | if (!buf) { |
441b62c1 | 542 | dev_err(&port->dev, "%s - out of memory.\n", __func__); |
a5b6f60c | 543 | /* Report back no change occurred */ |
95da310e | 544 | *tty->termios = *old_termios; |
1da177e4 LT |
545 | return; |
546 | } | |
1da177e4 | 547 | |
372db8a7 TG |
548 | i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
549 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
550 | 0, 0, buf, 7, 100); | |
551 | dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, | |
552 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); | |
1da177e4 LT |
553 | |
554 | if (cflag & CSIZE) { | |
555 | switch (cflag & CSIZE) { | |
3a0f43e9 AC |
556 | case CS5: |
557 | buf[6] = 5; | |
558 | break; | |
559 | case CS6: | |
560 | buf[6] = 6; | |
561 | break; | |
562 | case CS7: | |
563 | buf[6] = 7; | |
564 | break; | |
565 | default: | |
566 | case CS8: | |
567 | buf[6] = 8; | |
568 | break; | |
1da177e4 | 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 | ||
335f8514 AC |
655 | static void pl2303_dtr_rts(struct usb_serial_port *port, int on) |
656 | { | |
657 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
658 | unsigned long flags; | |
659 | u8 control; | |
660 | ||
661 | spin_lock_irqsave(&priv->lock, flags); | |
662 | /* Change DTR and RTS */ | |
663 | if (on) | |
664 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
665 | else | |
666 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
667 | control = priv->line_control; | |
668 | spin_unlock_irqrestore(&priv->lock, flags); | |
669 | set_control_lines(port->serial->dev, control); | |
670 | } | |
671 | ||
672 | static void pl2303_close(struct usb_serial_port *port) | |
572d3138 TG |
673 | { |
674 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
675 | unsigned long flags; | |
572d3138 | 676 | |
441b62c1 | 677 | dbg("%s - port %d", __func__, port->number); |
572d3138 | 678 | |
572d3138 | 679 | spin_lock_irqsave(&priv->lock, flags); |
572d3138 TG |
680 | /* clear out any remaining data in the buffer */ |
681 | pl2303_buf_clear(priv->buf); | |
682 | spin_unlock_irqrestore(&priv->lock, flags); | |
683 | ||
572d3138 | 684 | /* shutdown our urbs */ |
441b62c1 | 685 | dbg("%s - shutting down urbs", __func__); |
572d3138 TG |
686 | usb_kill_urb(port->write_urb); |
687 | usb_kill_urb(port->read_urb); | |
688 | usb_kill_urb(port->interrupt_in_urb); | |
689 | ||
1da177e4 LT |
690 | } |
691 | ||
95da310e AC |
692 | static int pl2303_open(struct tty_struct *tty, |
693 | struct usb_serial_port *port, struct file *filp) | |
1da177e4 | 694 | { |
606d099c | 695 | struct ktermios tmp_termios; |
1da177e4 LT |
696 | struct usb_serial *serial = port->serial; |
697 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
1da177e4 LT |
698 | int result; |
699 | ||
441b62c1 | 700 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 701 | |
1694899f D |
702 | if (priv->type != HX) { |
703 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
704 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
3e152505 | 705 | } else { |
1da177e4 | 706 | /* reset upstream data pipes */ |
eb44da0b SS |
707 | pl2303_vendor_write(8, 0, serial); |
708 | pl2303_vendor_write(9, 0, serial); | |
1da177e4 LT |
709 | } |
710 | ||
1da177e4 | 711 | /* Setup termios */ |
95da310e AC |
712 | if (tty) |
713 | pl2303_set_termios(tty, port, &tmp_termios); | |
1da177e4 | 714 | |
3a0f43e9 | 715 | /* FIXME: need to assert RTS and DTR if CRTSCTS off */ |
1da177e4 | 716 | |
441b62c1 | 717 | dbg("%s - submitting read urb", __func__); |
1da177e4 | 718 | port->read_urb->dev = serial->dev; |
372db8a7 | 719 | result = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1da177e4 | 720 | if (result) { |
372db8a7 | 721 | dev_err(&port->dev, "%s - failed submitting read urb," |
441b62c1 | 722 | " error %d\n", __func__, result); |
335f8514 | 723 | pl2303_close(port); |
1da177e4 LT |
724 | return -EPROTO; |
725 | } | |
726 | ||
441b62c1 | 727 | dbg("%s - submitting interrupt urb", __func__); |
1da177e4 | 728 | port->interrupt_in_urb->dev = serial->dev; |
372db8a7 | 729 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
1da177e4 | 730 | if (result) { |
372db8a7 | 731 | dev_err(&port->dev, "%s - failed submitting interrupt urb," |
441b62c1 | 732 | " error %d\n", __func__, result); |
335f8514 | 733 | pl2303_close(port); |
1da177e4 LT |
734 | return -EPROTO; |
735 | } | |
335f8514 | 736 | port->port.drain_delay = 256; |
1da177e4 LT |
737 | return 0; |
738 | } | |
739 | ||
95da310e | 740 | static int pl2303_tiocmset(struct tty_struct *tty, struct file *file, |
372db8a7 | 741 | unsigned int set, unsigned int clear) |
1da177e4 | 742 | { |
95da310e | 743 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
744 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
745 | unsigned long flags; | |
746 | u8 control; | |
747 | ||
6fdd8e8e FL |
748 | if (!usb_get_intfdata(port->serial->interface)) |
749 | return -ENODEV; | |
750 | ||
372db8a7 | 751 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
752 | if (set & TIOCM_RTS) |
753 | priv->line_control |= CONTROL_RTS; | |
754 | if (set & TIOCM_DTR) | |
755 | priv->line_control |= CONTROL_DTR; | |
756 | if (clear & TIOCM_RTS) | |
757 | priv->line_control &= ~CONTROL_RTS; | |
758 | if (clear & TIOCM_DTR) | |
759 | priv->line_control &= ~CONTROL_DTR; | |
760 | control = priv->line_control; | |
372db8a7 | 761 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 762 | |
372db8a7 | 763 | return set_control_lines(port->serial->dev, control); |
1da177e4 LT |
764 | } |
765 | ||
95da310e | 766 | static int pl2303_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 767 | { |
95da310e | 768 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
769 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
770 | unsigned long flags; | |
771 | unsigned int mcr; | |
772 | unsigned int status; | |
773 | unsigned int result; | |
774 | ||
441b62c1 | 775 | dbg("%s (%d)", __func__, port->number); |
1da177e4 | 776 | |
6fdd8e8e FL |
777 | if (!usb_get_intfdata(port->serial->interface)) |
778 | return -ENODEV; | |
779 | ||
372db8a7 | 780 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
781 | mcr = priv->line_control; |
782 | status = priv->line_status; | |
372db8a7 | 783 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
784 | |
785 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) | |
786 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) | |
787 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
788 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
789 | | ((status & UART_RING) ? TIOCM_RI : 0) | |
790 | | ((status & UART_DCD) ? TIOCM_CD : 0); | |
791 | ||
441b62c1 | 792 | dbg("%s - result = %x", __func__, result); |
1da177e4 LT |
793 | |
794 | return result; | |
795 | } | |
796 | ||
335f8514 AC |
797 | static int pl2303_carrier_raised(struct usb_serial_port *port) |
798 | { | |
799 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
800 | if (priv->line_status & UART_DCD) | |
801 | return 1; | |
802 | return 0; | |
803 | } | |
804 | ||
1da177e4 LT |
805 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) |
806 | { | |
807 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
808 | unsigned long flags; | |
809 | unsigned int prevstatus; | |
810 | unsigned int status; | |
811 | unsigned int changed; | |
812 | ||
372db8a7 | 813 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 814 | prevstatus = priv->line_status; |
372db8a7 | 815 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
816 | |
817 | while (1) { | |
818 | interruptible_sleep_on(&priv->delta_msr_wait); | |
819 | /* see if a signal did it */ | |
820 | if (signal_pending(current)) | |
821 | return -ERESTARTSYS; | |
372db8a7 TG |
822 | |
823 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 824 | status = priv->line_status; |
372db8a7 TG |
825 | spin_unlock_irqrestore(&priv->lock, flags); |
826 | ||
3a0f43e9 | 827 | changed = prevstatus ^ status; |
372db8a7 | 828 | |
1da177e4 LT |
829 | if (((arg & TIOCM_RNG) && (changed & UART_RING)) || |
830 | ((arg & TIOCM_DSR) && (changed & UART_DSR)) || | |
831 | ((arg & TIOCM_CD) && (changed & UART_DCD)) || | |
3a0f43e9 | 832 | ((arg & TIOCM_CTS) && (changed & UART_CTS))) { |
1da177e4 LT |
833 | return 0; |
834 | } | |
835 | prevstatus = status; | |
836 | } | |
837 | /* NOTREACHED */ | |
838 | return 0; | |
839 | } | |
840 | ||
95da310e | 841 | static int pl2303_ioctl(struct tty_struct *tty, struct file *file, |
372db8a7 | 842 | unsigned int cmd, unsigned long arg) |
1da177e4 | 843 | { |
95da310e | 844 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 845 | dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); |
1da177e4 LT |
846 | |
847 | switch (cmd) { | |
3a0f43e9 AC |
848 | case TIOCMIWAIT: |
849 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); | |
850 | return wait_modem_info(port, arg); | |
851 | default: | |
852 | dbg("%s not supported = 0x%04x", __func__, cmd); | |
853 | break; | |
1da177e4 | 854 | } |
1da177e4 LT |
855 | return -ENOIOCTLCMD; |
856 | } | |
857 | ||
95da310e | 858 | static void pl2303_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 859 | { |
95da310e | 860 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
861 | struct usb_serial *serial = port->serial; |
862 | u16 state; | |
863 | int result; | |
864 | ||
441b62c1 | 865 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
866 | |
867 | if (break_state == 0) | |
868 | state = BREAK_OFF; | |
869 | else | |
870 | state = BREAK_ON; | |
3a0f43e9 AC |
871 | dbg("%s - turning break %s", __func__, |
872 | state == BREAK_OFF ? "off" : "on"); | |
1da177e4 | 873 | |
372db8a7 TG |
874 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
875 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, | |
876 | 0, NULL, 0, 100); | |
1da177e4 | 877 | if (result) |
441b62c1 | 878 | dbg("%s - error sending break = %d", __func__, result); |
1da177e4 LT |
879 | } |
880 | ||
f9c99bb8 | 881 | static void pl2303_release(struct usb_serial *serial) |
1da177e4 LT |
882 | { |
883 | int i; | |
884 | struct pl2303_private *priv; | |
885 | ||
441b62c1 | 886 | dbg("%s", __func__); |
1da177e4 LT |
887 | |
888 | for (i = 0; i < serial->num_ports; ++i) { | |
889 | priv = usb_get_serial_port_data(serial->port[i]); | |
890 | if (priv) { | |
891 | pl2303_buf_free(priv->buf); | |
892 | kfree(priv); | |
1da177e4 | 893 | } |
372db8a7 | 894 | } |
1da177e4 LT |
895 | } |
896 | ||
97bb13ec FL |
897 | static void pl2303_update_line_status(struct usb_serial_port *port, |
898 | unsigned char *data, | |
899 | unsigned int actual_length) | |
900 | { | |
901 | ||
902 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
903 | unsigned long flags; | |
904 | u8 status_idx = UART_STATE; | |
95f209f9 | 905 | u8 length = UART_STATE + 1; |
9c537616 | 906 | u16 idv, idp; |
97bb13ec | 907 | |
9c537616 TG |
908 | idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); |
909 | idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); | |
910 | ||
911 | ||
912 | if (idv == SIEMENS_VENDOR_ID) { | |
913 | if (idp == SIEMENS_PRODUCT_ID_X65 || | |
914 | idp == SIEMENS_PRODUCT_ID_SX1 || | |
915 | idp == SIEMENS_PRODUCT_ID_X75) { | |
916 | ||
917 | length = 1; | |
918 | status_idx = 0; | |
919 | } | |
97bb13ec FL |
920 | } |
921 | ||
922 | if (actual_length < length) | |
a009b75a | 923 | return; |
97bb13ec | 924 | |
3a0f43e9 | 925 | /* Save off the uart status for others to look at */ |
97bb13ec FL |
926 | spin_lock_irqsave(&priv->lock, flags); |
927 | priv->line_status = data[status_idx]; | |
928 | spin_unlock_irqrestore(&priv->lock, flags); | |
430eb0d2 JW |
929 | if (priv->line_status & UART_BREAK_ERROR) |
930 | usb_serial_handle_break(port); | |
372db8a7 | 931 | wake_up_interruptible(&priv->delta_msr_wait); |
97bb13ec | 932 | } |
1da177e4 | 933 | |
7d12e780 | 934 | static void pl2303_read_int_callback(struct urb *urb) |
1da177e4 | 935 | { |
cdc97792 | 936 | struct usb_serial_port *port = urb->context; |
1da177e4 | 937 | unsigned char *data = urb->transfer_buffer; |
97bb13ec | 938 | unsigned int actual_length = urb->actual_length; |
461d696a GKH |
939 | int status = urb->status; |
940 | int retval; | |
1da177e4 | 941 | |
441b62c1 | 942 | dbg("%s (%d)", __func__, port->number); |
1da177e4 | 943 | |
461d696a | 944 | switch (status) { |
1da177e4 LT |
945 | case 0: |
946 | /* success */ | |
947 | break; | |
948 | case -ECONNRESET: | |
949 | case -ENOENT: | |
950 | case -ESHUTDOWN: | |
951 | /* this urb is terminated, clean up */ | |
441b62c1 | 952 | dbg("%s - urb shutting down with status: %d", __func__, |
461d696a | 953 | status); |
1da177e4 LT |
954 | return; |
955 | default: | |
441b62c1 | 956 | dbg("%s - nonzero urb status received: %d", __func__, |
461d696a | 957 | status); |
1da177e4 LT |
958 | goto exit; |
959 | } | |
960 | ||
441b62c1 | 961 | usb_serial_debug_data(debug, &port->dev, __func__, |
372db8a7 TG |
962 | urb->actual_length, urb->transfer_buffer); |
963 | ||
97bb13ec | 964 | pl2303_update_line_status(port, data, actual_length); |
1da177e4 | 965 | |
1da177e4 | 966 | exit: |
461d696a GKH |
967 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
968 | if (retval) | |
372db8a7 TG |
969 | dev_err(&urb->dev->dev, |
970 | "%s - usb_submit_urb failed with result %d\n", | |
441b62c1 | 971 | __func__, retval); |
1da177e4 LT |
972 | } |
973 | ||
7d12e780 | 974 | static void pl2303_read_bulk_callback(struct urb *urb) |
1da177e4 | 975 | { |
cdc97792 | 976 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
977 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
978 | struct tty_struct *tty; | |
979 | unsigned char *data = urb->transfer_buffer; | |
980 | unsigned long flags; | |
981 | int i; | |
982 | int result; | |
461d696a GKH |
983 | int status = urb->status; |
984 | u8 line_status; | |
1da177e4 LT |
985 | char tty_flag; |
986 | ||
441b62c1 | 987 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 988 | |
461d696a | 989 | if (status) { |
441b62c1 | 990 | dbg("%s - urb status = %d", __func__, status); |
95da310e | 991 | if (!port->port.count) { |
441b62c1 | 992 | dbg("%s - port is closed, exiting.", __func__); |
1da177e4 LT |
993 | return; |
994 | } | |
461d696a | 995 | if (status == -EPROTO) { |
372db8a7 TG |
996 | /* PL2303 mysteriously fails with -EPROTO reschedule |
997 | * the read */ | |
998 | dbg("%s - caught -EPROTO, resubmitting the urb", | |
441b62c1 | 999 | __func__); |
1da177e4 LT |
1000 | urb->dev = port->serial->dev; |
1001 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1002 | if (result) | |
372db8a7 TG |
1003 | dev_err(&urb->dev->dev, "%s - failed" |
1004 | " resubmitting read urb, error %d\n", | |
441b62c1 | 1005 | __func__, result); |
1da177e4 LT |
1006 | return; |
1007 | } | |
441b62c1 | 1008 | dbg("%s - unable to handle the error, exiting.", __func__); |
1da177e4 LT |
1009 | return; |
1010 | } | |
1011 | ||
441b62c1 | 1012 | usb_serial_debug_data(debug, &port->dev, __func__, |
372db8a7 | 1013 | urb->actual_length, data); |
1da177e4 LT |
1014 | |
1015 | /* get tty_flag from status */ | |
1016 | tty_flag = TTY_NORMAL; | |
1017 | ||
1018 | spin_lock_irqsave(&priv->lock, flags); | |
461d696a | 1019 | line_status = priv->line_status; |
1da177e4 LT |
1020 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; |
1021 | spin_unlock_irqrestore(&priv->lock, flags); | |
372db8a7 | 1022 | wake_up_interruptible(&priv->delta_msr_wait); |
1da177e4 LT |
1023 | |
1024 | /* break takes precedence over parity, */ | |
1025 | /* which takes precedence over framing errors */ | |
3a0f43e9 | 1026 | if (line_status & UART_BREAK_ERROR) |
1da177e4 | 1027 | tty_flag = TTY_BREAK; |
461d696a | 1028 | else if (line_status & UART_PARITY_ERROR) |
1da177e4 | 1029 | tty_flag = TTY_PARITY; |
461d696a | 1030 | else if (line_status & UART_FRAME_ERROR) |
1da177e4 | 1031 | tty_flag = TTY_FRAME; |
441b62c1 | 1032 | dbg("%s - tty_flag = %d", __func__, tty_flag); |
1da177e4 | 1033 | |
4a90f09b | 1034 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1035 | if (tty && urb->actual_length) { |
33f0f88f | 1036 | tty_buffer_request_room(tty, urb->actual_length + 1); |
1da177e4 | 1037 | /* overrun is special, not associated with a char */ |
461d696a | 1038 | if (line_status & UART_OVERRUN_ERROR) |
1da177e4 | 1039 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
33f0f88f | 1040 | for (i = 0; i < urb->actual_length; ++i) |
24a15a62 | 1041 | if (!usb_serial_handle_sysrq_char(tty, port, data[i])) |
430eb0d2 | 1042 | tty_insert_flip_char(tty, data[i], tty_flag); |
372db8a7 | 1043 | tty_flip_buffer_push(tty); |
1da177e4 | 1044 | } |
4a90f09b | 1045 | tty_kref_put(tty); |
1da177e4 | 1046 | /* Schedule the next read _if_ we are still open */ |
95da310e | 1047 | if (port->port.count) { |
1da177e4 LT |
1048 | urb->dev = port->serial->dev; |
1049 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1050 | if (result) | |
372db8a7 | 1051 | dev_err(&urb->dev->dev, "%s - failed resubmitting" |
441b62c1 | 1052 | " read urb, error %d\n", __func__, result); |
1da177e4 LT |
1053 | } |
1054 | ||
1055 | return; | |
1056 | } | |
1057 | ||
7d12e780 | 1058 | static void pl2303_write_bulk_callback(struct urb *urb) |
1da177e4 | 1059 | { |
cdc97792 | 1060 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1061 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
1062 | int result; | |
461d696a | 1063 | int status = urb->status; |
1da177e4 | 1064 | |
441b62c1 | 1065 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1066 | |
461d696a | 1067 | switch (status) { |
1da177e4 LT |
1068 | case 0: |
1069 | /* success */ | |
1070 | break; | |
1071 | case -ECONNRESET: | |
1072 | case -ENOENT: | |
1073 | case -ESHUTDOWN: | |
1074 | /* this urb is terminated, clean up */ | |
441b62c1 | 1075 | dbg("%s - urb shutting down with status: %d", __func__, |
461d696a | 1076 | status); |
1da177e4 LT |
1077 | priv->write_urb_in_use = 0; |
1078 | return; | |
1079 | default: | |
1080 | /* error in the urb, so we have to resubmit it */ | |
441b62c1 HH |
1081 | dbg("%s - Overflow in write", __func__); |
1082 | dbg("%s - nonzero write bulk status received: %d", __func__, | |
461d696a | 1083 | status); |
1da177e4 LT |
1084 | port->write_urb->transfer_buffer_length = 1; |
1085 | port->write_urb->dev = port->serial->dev; | |
372db8a7 | 1086 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1da177e4 | 1087 | if (result) |
372db8a7 | 1088 | dev_err(&urb->dev->dev, "%s - failed resubmitting write" |
441b62c1 | 1089 | " urb, error %d\n", __func__, result); |
1da177e4 LT |
1090 | else |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | priv->write_urb_in_use = 0; | |
1095 | ||
1096 | /* send any buffered data */ | |
1097 | pl2303_send(port); | |
1098 | } | |
1099 | ||
572d3138 TG |
1100 | /* All of the device info needed for the PL2303 SIO serial converter */ |
1101 | static struct usb_serial_driver pl2303_device = { | |
1102 | .driver = { | |
1103 | .owner = THIS_MODULE, | |
1104 | .name = "pl2303", | |
1105 | }, | |
1106 | .id_table = id_table, | |
d9b1b787 | 1107 | .usb_driver = &pl2303_driver, |
572d3138 TG |
1108 | .num_ports = 1, |
1109 | .open = pl2303_open, | |
1110 | .close = pl2303_close, | |
335f8514 AC |
1111 | .dtr_rts = pl2303_dtr_rts, |
1112 | .carrier_raised = pl2303_carrier_raised, | |
572d3138 TG |
1113 | .write = pl2303_write, |
1114 | .ioctl = pl2303_ioctl, | |
1115 | .break_ctl = pl2303_break_ctl, | |
1116 | .set_termios = pl2303_set_termios, | |
1117 | .tiocmget = pl2303_tiocmget, | |
1118 | .tiocmset = pl2303_tiocmset, | |
1119 | .read_bulk_callback = pl2303_read_bulk_callback, | |
1120 | .read_int_callback = pl2303_read_int_callback, | |
1121 | .write_bulk_callback = pl2303_write_bulk_callback, | |
1122 | .write_room = pl2303_write_room, | |
1123 | .chars_in_buffer = pl2303_chars_in_buffer, | |
1124 | .attach = pl2303_startup, | |
f9c99bb8 | 1125 | .release = pl2303_release, |
572d3138 | 1126 | }; |
1da177e4 | 1127 | |
372db8a7 | 1128 | static int __init pl2303_init(void) |
1da177e4 LT |
1129 | { |
1130 | int retval; | |
372db8a7 | 1131 | |
1da177e4 LT |
1132 | retval = usb_serial_register(&pl2303_device); |
1133 | if (retval) | |
1134 | goto failed_usb_serial_register; | |
1135 | retval = usb_register(&pl2303_driver); | |
1136 | if (retval) | |
1137 | goto failed_usb_register; | |
c197a8db | 1138 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1139 | return 0; |
1140 | failed_usb_register: | |
1141 | usb_serial_deregister(&pl2303_device); | |
1142 | failed_usb_serial_register: | |
1143 | return retval; | |
1144 | } | |
1145 | ||
372db8a7 | 1146 | static void __exit pl2303_exit(void) |
1da177e4 | 1147 | { |
372db8a7 TG |
1148 | usb_deregister(&pl2303_driver); |
1149 | usb_serial_deregister(&pl2303_device); | |
1da177e4 LT |
1150 | } |
1151 | ||
1da177e4 LT |
1152 | module_init(pl2303_init); |
1153 | module_exit(pl2303_exit); | |
1154 | ||
1155 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1156 | MODULE_LICENSE("GPL"); |
1157 | ||
1158 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1159 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1160 |