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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 | ||
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 | 696 | if (bps > 1200) |
3a0f43e9 | 697 | timeout = max((HZ*2560)/bps, HZ/10); |
572d3138 TG |
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 | 742 | |
3a0f43e9 | 743 | /* FIXME: need to assert RTS and DTR if CRTSCTS off */ |
1da177e4 | 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 | ||
3a0f43e9 | 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)) || | |
3a0f43e9 | 851 | ((arg & TIOCM_CTS) && (changed & UART_CTS))) { |
1da177e4 LT |
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) { | |
3a0f43e9 AC |
867 | case TIOCMIWAIT: |
868 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); | |
869 | return wait_modem_info(port, arg); | |
870 | default: | |
871 | dbg("%s not supported = 0x%04x", __func__, cmd); | |
872 | break; | |
1da177e4 | 873 | } |
1da177e4 LT |
874 | return -ENOIOCTLCMD; |
875 | } | |
876 | ||
95da310e | 877 | static void pl2303_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 878 | { |
95da310e | 879 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
880 | struct usb_serial *serial = port->serial; |
881 | u16 state; | |
882 | int result; | |
883 | ||
441b62c1 | 884 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
885 | |
886 | if (break_state == 0) | |
887 | state = BREAK_OFF; | |
888 | else | |
889 | state = BREAK_ON; | |
3a0f43e9 AC |
890 | dbg("%s - turning break %s", __func__, |
891 | state == BREAK_OFF ? "off" : "on"); | |
1da177e4 | 892 | |
372db8a7 TG |
893 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
894 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, | |
895 | 0, NULL, 0, 100); | |
1da177e4 | 896 | if (result) |
441b62c1 | 897 | dbg("%s - error sending break = %d", __func__, result); |
1da177e4 LT |
898 | } |
899 | ||
372db8a7 | 900 | static void pl2303_shutdown(struct usb_serial *serial) |
1da177e4 LT |
901 | { |
902 | int i; | |
903 | struct pl2303_private *priv; | |
904 | ||
441b62c1 | 905 | dbg("%s", __func__); |
1da177e4 LT |
906 | |
907 | for (i = 0; i < serial->num_ports; ++i) { | |
908 | priv = usb_get_serial_port_data(serial->port[i]); | |
909 | if (priv) { | |
910 | pl2303_buf_free(priv->buf); | |
911 | kfree(priv); | |
912 | usb_set_serial_port_data(serial->port[i], NULL); | |
913 | } | |
372db8a7 | 914 | } |
1da177e4 LT |
915 | } |
916 | ||
97bb13ec FL |
917 | static void pl2303_update_line_status(struct usb_serial_port *port, |
918 | unsigned char *data, | |
919 | unsigned int actual_length) | |
920 | { | |
921 | ||
922 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
923 | unsigned long flags; | |
924 | u8 status_idx = UART_STATE; | |
95f209f9 | 925 | u8 length = UART_STATE + 1; |
9c537616 | 926 | u16 idv, idp; |
97bb13ec | 927 | |
9c537616 TG |
928 | idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); |
929 | idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); | |
930 | ||
931 | ||
932 | if (idv == SIEMENS_VENDOR_ID) { | |
933 | if (idp == SIEMENS_PRODUCT_ID_X65 || | |
934 | idp == SIEMENS_PRODUCT_ID_SX1 || | |
935 | idp == SIEMENS_PRODUCT_ID_X75) { | |
936 | ||
937 | length = 1; | |
938 | status_idx = 0; | |
939 | } | |
97bb13ec FL |
940 | } |
941 | ||
942 | if (actual_length < length) | |
a009b75a | 943 | return; |
97bb13ec | 944 | |
3a0f43e9 | 945 | /* Save off the uart status for others to look at */ |
97bb13ec FL |
946 | spin_lock_irqsave(&priv->lock, flags); |
947 | priv->line_status = data[status_idx]; | |
948 | spin_unlock_irqrestore(&priv->lock, flags); | |
372db8a7 | 949 | wake_up_interruptible(&priv->delta_msr_wait); |
97bb13ec | 950 | } |
1da177e4 | 951 | |
7d12e780 | 952 | static void pl2303_read_int_callback(struct urb *urb) |
1da177e4 | 953 | { |
cdc97792 | 954 | struct usb_serial_port *port = urb->context; |
1da177e4 | 955 | unsigned char *data = urb->transfer_buffer; |
97bb13ec | 956 | unsigned int actual_length = urb->actual_length; |
461d696a GKH |
957 | int status = urb->status; |
958 | int retval; | |
1da177e4 | 959 | |
441b62c1 | 960 | dbg("%s (%d)", __func__, port->number); |
1da177e4 | 961 | |
461d696a | 962 | switch (status) { |
1da177e4 LT |
963 | case 0: |
964 | /* success */ | |
965 | break; | |
966 | case -ECONNRESET: | |
967 | case -ENOENT: | |
968 | case -ESHUTDOWN: | |
969 | /* this urb is terminated, clean up */ | |
441b62c1 | 970 | dbg("%s - urb shutting down with status: %d", __func__, |
461d696a | 971 | status); |
1da177e4 LT |
972 | return; |
973 | default: | |
441b62c1 | 974 | dbg("%s - nonzero urb status received: %d", __func__, |
461d696a | 975 | status); |
1da177e4 LT |
976 | goto exit; |
977 | } | |
978 | ||
441b62c1 | 979 | usb_serial_debug_data(debug, &port->dev, __func__, |
372db8a7 TG |
980 | urb->actual_length, urb->transfer_buffer); |
981 | ||
97bb13ec | 982 | pl2303_update_line_status(port, data, actual_length); |
1da177e4 | 983 | |
1da177e4 | 984 | exit: |
461d696a GKH |
985 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
986 | if (retval) | |
372db8a7 TG |
987 | dev_err(&urb->dev->dev, |
988 | "%s - usb_submit_urb failed with result %d\n", | |
441b62c1 | 989 | __func__, retval); |
1da177e4 LT |
990 | } |
991 | ||
7d12e780 | 992 | static void pl2303_read_bulk_callback(struct urb *urb) |
1da177e4 | 993 | { |
cdc97792 | 994 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
995 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
996 | struct tty_struct *tty; | |
997 | unsigned char *data = urb->transfer_buffer; | |
998 | unsigned long flags; | |
999 | int i; | |
1000 | int result; | |
461d696a GKH |
1001 | int status = urb->status; |
1002 | u8 line_status; | |
1da177e4 LT |
1003 | char tty_flag; |
1004 | ||
441b62c1 | 1005 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1006 | |
461d696a | 1007 | if (status) { |
441b62c1 | 1008 | dbg("%s - urb status = %d", __func__, status); |
95da310e | 1009 | if (!port->port.count) { |
441b62c1 | 1010 | dbg("%s - port is closed, exiting.", __func__); |
1da177e4 LT |
1011 | return; |
1012 | } | |
461d696a | 1013 | if (status == -EPROTO) { |
372db8a7 TG |
1014 | /* PL2303 mysteriously fails with -EPROTO reschedule |
1015 | * the read */ | |
1016 | dbg("%s - caught -EPROTO, resubmitting the urb", | |
441b62c1 | 1017 | __func__); |
1da177e4 LT |
1018 | urb->dev = port->serial->dev; |
1019 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1020 | if (result) | |
372db8a7 TG |
1021 | dev_err(&urb->dev->dev, "%s - failed" |
1022 | " resubmitting read urb, error %d\n", | |
441b62c1 | 1023 | __func__, result); |
1da177e4 LT |
1024 | return; |
1025 | } | |
441b62c1 | 1026 | dbg("%s - unable to handle the error, exiting.", __func__); |
1da177e4 LT |
1027 | return; |
1028 | } | |
1029 | ||
441b62c1 | 1030 | usb_serial_debug_data(debug, &port->dev, __func__, |
372db8a7 | 1031 | urb->actual_length, data); |
1da177e4 LT |
1032 | |
1033 | /* get tty_flag from status */ | |
1034 | tty_flag = TTY_NORMAL; | |
1035 | ||
1036 | spin_lock_irqsave(&priv->lock, flags); | |
461d696a | 1037 | line_status = priv->line_status; |
1da177e4 LT |
1038 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; |
1039 | spin_unlock_irqrestore(&priv->lock, flags); | |
372db8a7 | 1040 | wake_up_interruptible(&priv->delta_msr_wait); |
1da177e4 LT |
1041 | |
1042 | /* break takes precedence over parity, */ | |
1043 | /* which takes precedence over framing errors */ | |
3a0f43e9 | 1044 | if (line_status & UART_BREAK_ERROR) |
1da177e4 | 1045 | tty_flag = TTY_BREAK; |
461d696a | 1046 | else if (line_status & UART_PARITY_ERROR) |
1da177e4 | 1047 | tty_flag = TTY_PARITY; |
461d696a | 1048 | else if (line_status & UART_FRAME_ERROR) |
1da177e4 | 1049 | tty_flag = TTY_FRAME; |
441b62c1 | 1050 | dbg("%s - tty_flag = %d", __func__, tty_flag); |
1da177e4 | 1051 | |
4a90f09b | 1052 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1053 | if (tty && urb->actual_length) { |
33f0f88f | 1054 | tty_buffer_request_room(tty, urb->actual_length + 1); |
1da177e4 | 1055 | /* overrun is special, not associated with a char */ |
461d696a | 1056 | if (line_status & UART_OVERRUN_ERROR) |
1da177e4 | 1057 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
33f0f88f | 1058 | for (i = 0; i < urb->actual_length; ++i) |
372db8a7 TG |
1059 | tty_insert_flip_char(tty, data[i], tty_flag); |
1060 | tty_flip_buffer_push(tty); | |
1da177e4 | 1061 | } |
4a90f09b | 1062 | tty_kref_put(tty); |
1da177e4 | 1063 | /* Schedule the next read _if_ we are still open */ |
95da310e | 1064 | if (port->port.count) { |
1da177e4 LT |
1065 | urb->dev = port->serial->dev; |
1066 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1067 | if (result) | |
372db8a7 | 1068 | dev_err(&urb->dev->dev, "%s - failed resubmitting" |
441b62c1 | 1069 | " read urb, error %d\n", __func__, result); |
1da177e4 LT |
1070 | } |
1071 | ||
1072 | return; | |
1073 | } | |
1074 | ||
7d12e780 | 1075 | static void pl2303_write_bulk_callback(struct urb *urb) |
1da177e4 | 1076 | { |
cdc97792 | 1077 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1078 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
1079 | int result; | |
461d696a | 1080 | int status = urb->status; |
1da177e4 | 1081 | |
441b62c1 | 1082 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1083 | |
461d696a | 1084 | switch (status) { |
1da177e4 LT |
1085 | case 0: |
1086 | /* success */ | |
1087 | break; | |
1088 | case -ECONNRESET: | |
1089 | case -ENOENT: | |
1090 | case -ESHUTDOWN: | |
1091 | /* this urb is terminated, clean up */ | |
441b62c1 | 1092 | dbg("%s - urb shutting down with status: %d", __func__, |
461d696a | 1093 | status); |
1da177e4 LT |
1094 | priv->write_urb_in_use = 0; |
1095 | return; | |
1096 | default: | |
1097 | /* error in the urb, so we have to resubmit it */ | |
441b62c1 HH |
1098 | dbg("%s - Overflow in write", __func__); |
1099 | dbg("%s - nonzero write bulk status received: %d", __func__, | |
461d696a | 1100 | status); |
1da177e4 LT |
1101 | port->write_urb->transfer_buffer_length = 1; |
1102 | port->write_urb->dev = port->serial->dev; | |
372db8a7 | 1103 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1da177e4 | 1104 | if (result) |
372db8a7 | 1105 | dev_err(&urb->dev->dev, "%s - failed resubmitting write" |
441b62c1 | 1106 | " urb, error %d\n", __func__, result); |
1da177e4 LT |
1107 | else |
1108 | return; | |
1109 | } | |
1110 | ||
1111 | priv->write_urb_in_use = 0; | |
1112 | ||
1113 | /* send any buffered data */ | |
1114 | pl2303_send(port); | |
1115 | } | |
1116 | ||
572d3138 TG |
1117 | /* All of the device info needed for the PL2303 SIO serial converter */ |
1118 | static struct usb_serial_driver pl2303_device = { | |
1119 | .driver = { | |
1120 | .owner = THIS_MODULE, | |
1121 | .name = "pl2303", | |
1122 | }, | |
1123 | .id_table = id_table, | |
d9b1b787 | 1124 | .usb_driver = &pl2303_driver, |
572d3138 TG |
1125 | .num_ports = 1, |
1126 | .open = pl2303_open, | |
1127 | .close = pl2303_close, | |
1128 | .write = pl2303_write, | |
1129 | .ioctl = pl2303_ioctl, | |
1130 | .break_ctl = pl2303_break_ctl, | |
1131 | .set_termios = pl2303_set_termios, | |
1132 | .tiocmget = pl2303_tiocmget, | |
1133 | .tiocmset = pl2303_tiocmset, | |
1134 | .read_bulk_callback = pl2303_read_bulk_callback, | |
1135 | .read_int_callback = pl2303_read_int_callback, | |
1136 | .write_bulk_callback = pl2303_write_bulk_callback, | |
1137 | .write_room = pl2303_write_room, | |
1138 | .chars_in_buffer = pl2303_chars_in_buffer, | |
1139 | .attach = pl2303_startup, | |
1140 | .shutdown = pl2303_shutdown, | |
1141 | }; | |
1da177e4 | 1142 | |
372db8a7 | 1143 | static int __init pl2303_init(void) |
1da177e4 LT |
1144 | { |
1145 | int retval; | |
372db8a7 | 1146 | |
1da177e4 LT |
1147 | retval = usb_serial_register(&pl2303_device); |
1148 | if (retval) | |
1149 | goto failed_usb_serial_register; | |
1150 | retval = usb_register(&pl2303_driver); | |
1151 | if (retval) | |
1152 | goto failed_usb_register; | |
c197a8db | 1153 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1154 | return 0; |
1155 | failed_usb_register: | |
1156 | usb_serial_deregister(&pl2303_device); | |
1157 | failed_usb_serial_register: | |
1158 | return retval; | |
1159 | } | |
1160 | ||
372db8a7 | 1161 | static void __exit pl2303_exit(void) |
1da177e4 | 1162 | { |
372db8a7 TG |
1163 | usb_deregister(&pl2303_driver); |
1164 | usb_serial_deregister(&pl2303_device); | |
1da177e4 LT |
1165 | } |
1166 | ||
1da177e4 LT |
1167 | module_init(pl2303_init); |
1168 | module_exit(pl2303_exit); | |
1169 | ||
1170 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1171 | MODULE_LICENSE("GPL"); |
1172 | ||
1173 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1174 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1175 |