]>
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 | * | |
57ce61aa FS |
7 | * Copyright (C) 2009, 2013 Frank Schäfer <fschaefer.oss@googlemail.com> |
8 | * - fixes, improvements and documentation for the baud rate encoding methods | |
9 | * Copyright (C) 2013 Reinhard Max <max@suse.de> | |
10 | * - fixes and improvements for the divisor based baud rate encoding method | |
11 | * | |
1da177e4 LT |
12 | * Original driver for 2.2.x by anonymous |
13 | * | |
4d0dce3e GKH |
14 | * This program is free software; you can redistribute it and/or |
15 | * modify it under the terms of the GNU General Public License version | |
16 | * 2 as published by the Free Software Foundation. | |
1da177e4 | 17 | * |
3a0f43e9 AC |
18 | * See Documentation/usb/usb-serial.txt for more information on using this |
19 | * driver | |
1da177e4 | 20 | * |
1da177e4 LT |
21 | */ |
22 | ||
1da177e4 LT |
23 | #include <linux/kernel.h> |
24 | #include <linux/errno.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_driver.h> | |
29 | #include <linux/tty_flip.h> | |
30 | #include <linux/serial.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/moduleparam.h> | |
33 | #include <linux/spinlock.h> | |
3a0f43e9 | 34 | #include <linux/uaccess.h> |
1da177e4 | 35 | #include <linux/usb.h> |
a969888c | 36 | #include <linux/usb/serial.h> |
b2d6d98f | 37 | #include <asm/unaligned.h> |
1da177e4 LT |
38 | #include "pl2303.h" |
39 | ||
40 | /* | |
41 | * Version Information | |
42 | */ | |
1da177e4 LT |
43 | #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" |
44 | ||
7d40d7e8 | 45 | static const struct usb_device_id id_table[] = { |
1da177e4 LT |
46 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, |
47 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, | |
3d861494 | 48 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, |
1da177e4 LT |
49 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, |
50 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, | |
b483b6aa | 51 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, |
4be2fa18 | 52 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, |
727df356 | 53 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, |
18344a1c | 54 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, |
96a3e79e | 55 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) }, |
1da177e4 | 56 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
8a28dea3 | 57 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, |
1da177e4 LT |
58 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
59 | { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, | |
60 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, | |
61 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, | |
62 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, | |
58381719 | 63 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, |
1da177e4 LT |
64 | { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
65 | { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, | |
66 | { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, | |
67 | { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, | |
68 | { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, | |
69 | { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, | |
70 | { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, | |
71 | { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, | |
a8310f3b | 72 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, |
1da177e4 | 73 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, |
a8310f3b | 74 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, |
e7beb667 | 75 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) }, |
912299f6 | 76 | { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ |
acbb36f1 | 77 | { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, |
c6c27721 CL |
78 | { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, |
79 | { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, | |
6cceb05f | 80 | { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, |
c6c27721 | 81 | { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, |
491b04ce | 82 | { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, |
3b928474 | 83 | { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, |
b7aa94b6 | 84 | { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, |
8fd80133 | 85 | { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, |
2d94b981 | 86 | { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, |
9e3285db | 87 | { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, |
cc311ee7 | 88 | { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, |
7c992001 | 89 | { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, |
af4b8514 | 90 | { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, |
8540d666 | 91 | { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, |
f36ecd5d | 92 | { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, |
49276560 | 93 | { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, |
35904e6b | 94 | { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, |
9a61d726 | 95 | { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, |
598f0b70 | 96 | { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, |
1da177e4 LT |
97 | { } /* Terminating entry */ |
98 | }; | |
99 | ||
372db8a7 | 100 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 101 | |
1da177e4 LT |
102 | #define SET_LINE_REQUEST_TYPE 0x21 |
103 | #define SET_LINE_REQUEST 0x20 | |
104 | ||
105 | #define SET_CONTROL_REQUEST_TYPE 0x21 | |
106 | #define SET_CONTROL_REQUEST 0x22 | |
107 | #define CONTROL_DTR 0x01 | |
108 | #define CONTROL_RTS 0x02 | |
109 | ||
110 | #define BREAK_REQUEST_TYPE 0x21 | |
3a0f43e9 | 111 | #define BREAK_REQUEST 0x23 |
1da177e4 LT |
112 | #define BREAK_ON 0xffff |
113 | #define BREAK_OFF 0x0000 | |
114 | ||
115 | #define GET_LINE_REQUEST_TYPE 0xa1 | |
116 | #define GET_LINE_REQUEST 0x21 | |
117 | ||
118 | #define VENDOR_WRITE_REQUEST_TYPE 0x40 | |
119 | #define VENDOR_WRITE_REQUEST 0x01 | |
120 | ||
121 | #define VENDOR_READ_REQUEST_TYPE 0xc0 | |
122 | #define VENDOR_READ_REQUEST 0x01 | |
123 | ||
124 | #define UART_STATE 0x08 | |
125 | #define UART_STATE_TRANSIENT_MASK 0x74 | |
126 | #define UART_DCD 0x01 | |
127 | #define UART_DSR 0x02 | |
128 | #define UART_BREAK_ERROR 0x04 | |
129 | #define UART_RING 0x08 | |
130 | #define UART_FRAME_ERROR 0x10 | |
131 | #define UART_PARITY_ERROR 0x20 | |
132 | #define UART_OVERRUN_ERROR 0x40 | |
133 | #define UART_CTS 0x80 | |
134 | ||
1da177e4 LT |
135 | |
136 | enum pl2303_type { | |
034d1527 FS |
137 | type_0, /* H version ? */ |
138 | type_1, /* H version ? */ | |
139 | HX_TA, /* HX(A) / X(A) / TA version */ /* TODO: improve */ | |
140 | HXD_EA_RA_SA, /* HXD / EA / RA / SA version */ /* TODO: improve */ | |
141 | TB, /* TB version */ | |
1da177e4 | 142 | }; |
034d1527 FS |
143 | /* |
144 | * NOTE: don't know the difference between type 0 and type 1, | |
145 | * until someone from Prolific tells us... | |
146 | * TODO: distinguish between X/HX, TA and HXD, EA, RA, SA variants | |
147 | */ | |
1da177e4 | 148 | |
8bf769eb JH |
149 | struct pl2303_serial_private { |
150 | enum pl2303_type type; | |
151 | }; | |
152 | ||
1da177e4 LT |
153 | struct pl2303_private { |
154 | spinlock_t lock; | |
1da177e4 LT |
155 | u8 line_control; |
156 | u8 line_status; | |
1da177e4 LT |
157 | }; |
158 | ||
eb44da0b SS |
159 | static int pl2303_vendor_read(__u16 value, __u16 index, |
160 | struct usb_serial *serial, unsigned char *buf) | |
161 | { | |
162 | int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
163 | VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, | |
164 | value, index, buf, 1, 100); | |
7b5789a8 | 165 | dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n", |
d8789b2b GKH |
166 | VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index, |
167 | res, buf[0]); | |
eb44da0b SS |
168 | return res; |
169 | } | |
170 | ||
171 | static int pl2303_vendor_write(__u16 value, __u16 index, | |
172 | struct usb_serial *serial) | |
173 | { | |
174 | int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
175 | VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, | |
176 | value, index, NULL, 0, 100); | |
7b5789a8 | 177 | dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n", |
d8789b2b GKH |
178 | VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index, |
179 | res); | |
eb44da0b SS |
180 | return res; |
181 | } | |
182 | ||
372db8a7 | 183 | static int pl2303_startup(struct usb_serial *serial) |
1da177e4 | 184 | { |
8bf769eb | 185 | struct pl2303_serial_private *spriv; |
1da177e4 | 186 | enum pl2303_type type = type_0; |
a77a8c23 | 187 | char *type_str = "unknown (treating as type_0)"; |
3e152505 | 188 | unsigned char *buf; |
8bf769eb JH |
189 | |
190 | spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); | |
191 | if (!spriv) | |
192 | return -ENOMEM; | |
1da177e4 | 193 | |
3e152505 | 194 | buf = kmalloc(10, GFP_KERNEL); |
8bf769eb JH |
195 | if (!buf) { |
196 | kfree(spriv); | |
3e152505 | 197 | return -ENOMEM; |
8bf769eb | 198 | } |
3e152505 | 199 | |
a77a8c23 | 200 | if (serial->dev->descriptor.bDeviceClass == 0x02) { |
1da177e4 | 201 | type = type_0; |
a77a8c23 FS |
202 | type_str = "type_0"; |
203 | } else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) { | |
034d1527 FS |
204 | /* |
205 | * NOTE: The bcdDevice version is the only difference between | |
206 | * the device descriptors of the X/HX, HXD, EA, RA, SA, TA, TB | |
207 | */ | |
208 | if (le16_to_cpu(serial->dev->descriptor.bcdDevice) == 0x300) { | |
09169197 GKH |
209 | type = HX_TA; |
210 | type_str = "X/HX/TA"; | |
034d1527 FS |
211 | } else if (le16_to_cpu(serial->dev->descriptor.bcdDevice) |
212 | == 0x400) { | |
213 | type = HXD_EA_RA_SA; | |
214 | type_str = "HXD/EA/RA/SA"; | |
215 | } else if (le16_to_cpu(serial->dev->descriptor.bcdDevice) | |
216 | == 0x500) { | |
217 | type = TB; | |
218 | type_str = "TB"; | |
219 | } else { | |
220 | dev_info(&serial->interface->dev, | |
221 | "unknown/unsupported device type\n"); | |
222 | kfree(spriv); | |
223 | kfree(buf); | |
224 | return -ENODEV; | |
225 | } | |
a77a8c23 FS |
226 | } else if (serial->dev->descriptor.bDeviceClass == 0x00 |
227 | || serial->dev->descriptor.bDeviceClass == 0xFF) { | |
1da177e4 | 228 | type = type_1; |
a77a8c23 FS |
229 | type_str = "type_1"; |
230 | } | |
231 | dev_dbg(&serial->interface->dev, "device type: %s\n", type_str); | |
1da177e4 | 232 | |
8bf769eb JH |
233 | spriv->type = type; |
234 | usb_set_serial_data(serial, spriv); | |
3e152505 SS |
235 | |
236 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
237 | pl2303_vendor_write(0x0404, 0, serial); | |
238 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
239 | pl2303_vendor_read(0x8383, 0, serial, buf); | |
240 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
241 | pl2303_vendor_write(0x0404, 1, serial); | |
242 | pl2303_vendor_read(0x8484, 0, serial, buf); | |
243 | pl2303_vendor_read(0x8383, 0, serial, buf); | |
244 | pl2303_vendor_write(0, 1, serial); | |
245 | pl2303_vendor_write(1, 0, serial); | |
034d1527 | 246 | if (type == type_0 || type == type_1) |
3e152505 | 247 | pl2303_vendor_write(2, 0x24, serial); |
034d1527 FS |
248 | else |
249 | pl2303_vendor_write(2, 0x44, serial); | |
3e152505 SS |
250 | |
251 | kfree(buf); | |
1da177e4 | 252 | return 0; |
8bf769eb | 253 | } |
1da177e4 | 254 | |
8bf769eb JH |
255 | static void pl2303_release(struct usb_serial *serial) |
256 | { | |
257 | struct pl2303_serial_private *spriv; | |
258 | ||
259 | spriv = usb_get_serial_data(serial); | |
260 | kfree(spriv); | |
261 | } | |
262 | ||
263 | static int pl2303_port_probe(struct usb_serial_port *port) | |
264 | { | |
265 | struct pl2303_private *priv; | |
266 | ||
267 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
268 | if (!priv) | |
269 | return -ENOMEM; | |
270 | ||
271 | spin_lock_init(&priv->lock); | |
8bf769eb JH |
272 | |
273 | usb_set_serial_port_data(port, priv); | |
274 | ||
d7be6221 JH |
275 | port->port.drain_delay = 256; |
276 | ||
8bf769eb JH |
277 | return 0; |
278 | } | |
279 | ||
280 | static int pl2303_port_remove(struct usb_serial_port *port) | |
281 | { | |
282 | struct pl2303_private *priv; | |
283 | ||
284 | priv = usb_get_serial_port_data(port); | |
285 | kfree(priv); | |
286 | ||
287 | return 0; | |
1da177e4 LT |
288 | } |
289 | ||
f45d0a5a | 290 | static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) |
1da177e4 | 291 | { |
f45d0a5a | 292 | struct usb_device *dev = port->serial->dev; |
1da177e4 | 293 | int retval; |
3a0f43e9 | 294 | |
372db8a7 TG |
295 | retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
296 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, | |
297 | value, 0, NULL, 0, 100); | |
f45d0a5a | 298 | dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__, |
d8789b2b | 299 | value, retval); |
1da177e4 LT |
300 | return retval; |
301 | } | |
302 | ||
e917ba01 FS |
303 | static int pl2303_baudrate_encode_direct(int baud, enum pl2303_type type, |
304 | u8 buf[4]) | |
305 | { | |
306 | /* | |
307 | * NOTE: Only the values defined in baud_sup are supported ! | |
09169197 GKH |
308 | * => if unsupported values are set, the PL2303 seems to |
309 | * use 9600 baud (at least my PL2303X always does) | |
e917ba01 FS |
310 | */ |
311 | const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600, | |
312 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, | |
313 | 57600, 115200, 230400, 460800, 614400, 921600, | |
034d1527 | 314 | 1228800, 2457600, 3000000, 6000000, 12000000 }; |
c23bda36 | 315 | /* |
034d1527 FS |
316 | * NOTE: With the exception of type_0/1 devices, the following |
317 | * additional baud rates are supported (tested with HX rev. 3A only): | |
318 | * 110*, 56000*, 128000, 134400, 161280, 201600, 256000*, 268800, | |
09169197 | 319 | * 403200, 806400. (*: not HX) |
034d1527 FS |
320 | * |
321 | * Maximum values: HXD, TB: 12000000; HX, TA: 6000000; | |
09169197 | 322 | * type_0+1: 1228800; RA: 921600; SA: 115200 |
034d1527 FS |
323 | * |
324 | * As long as we are not using this encoding method for anything else | |
09169197 GKH |
325 | * than the type_0+1 and HX chips, there is no point in complicating |
326 | * the code to support them. | |
c23bda36 | 327 | */ |
e917ba01 FS |
328 | int i; |
329 | ||
330 | /* Set baudrate to nearest supported value */ | |
331 | for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { | |
332 | if (baud_sup[i] > baud) | |
333 | break; | |
334 | } | |
335 | if (i == ARRAY_SIZE(baud_sup)) | |
336 | baud = baud_sup[i - 1]; | |
337 | else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) | |
338 | baud = baud_sup[i - 1]; | |
339 | else | |
340 | baud = baud_sup[i]; | |
034d1527 FS |
341 | /* Respect the chip type specific baud rate limits */ |
342 | /* | |
343 | * FIXME: as long as we don't know how to distinguish between the | |
344 | * HXD, EA, RA, and SA chip variants, allow the max. value of 12M. | |
345 | */ | |
346 | if (type == HX_TA) | |
347 | baud = min_t(int, baud, 6000000); | |
348 | else if (type == type_0 || type == type_1) | |
e917ba01 FS |
349 | baud = min_t(int, baud, 1228800); |
350 | /* Direct (standard) baud rate encoding method */ | |
351 | put_unaligned_le32(baud, buf); | |
352 | ||
353 | return baud; | |
354 | } | |
355 | ||
356 | static int pl2303_baudrate_encode_divisor(int baud, enum pl2303_type type, | |
357 | u8 buf[4]) | |
358 | { | |
359 | /* | |
360 | * Divisor based baud rate encoding method | |
361 | * | |
09169197 | 362 | * NOTE: it's not clear if the type_0/1 chips support this method |
e917ba01 FS |
363 | * |
364 | * divisor = 12MHz * 32 / baudrate = 2^A * B | |
365 | * | |
366 | * with | |
367 | * | |
368 | * A = buf[1] & 0x0e | |
369 | * B = buf[0] + (buf[1] & 0x01) << 8 | |
370 | * | |
371 | * Special cases: | |
372 | * => 8 < B < 16: device seems to work not properly | |
373 | * => B <= 8: device uses the max. value B = 512 instead | |
374 | */ | |
375 | unsigned int A, B; | |
376 | ||
b5c16c6a FS |
377 | /* |
378 | * NOTE: The Windows driver allows maximum baud rates of 110% of the | |
379 | * specified maximium value. | |
380 | * Quick tests with early (2004) HX (rev. A) chips suggest, that even | |
381 | * higher baud rates (up to the maximum of 24M baud !) are working fine, | |
382 | * but that should really be tested carefully in "real life" scenarios | |
383 | * before removing the upper limit completely. | |
384 | * Baud rates smaller than the specified 75 baud are definitely working | |
385 | * fine. | |
386 | */ | |
034d1527 | 387 | if (type == type_0 || type == type_1) |
b5c16c6a | 388 | baud = min_t(int, baud, 1228800 * 1.1); |
034d1527 FS |
389 | else if (type == HX_TA) |
390 | baud = min_t(int, baud, 6000000 * 1.1); | |
391 | else if (type == HXD_EA_RA_SA) | |
392 | /* HXD, EA: 12Mbps; RA: 1Mbps; SA: 115200 bps */ | |
393 | /* | |
394 | * FIXME: as long as we don't know how to distinguish between | |
395 | * these chip variants, allow the max. of these values | |
396 | */ | |
397 | baud = min_t(int, baud, 12000000 * 1.1); | |
398 | else if (type == TB) | |
399 | baud = min_t(int, baud, 12000000 * 1.1); | |
e917ba01 FS |
400 | /* Determine factors A and B */ |
401 | A = 0; | |
402 | B = 12000000 * 32 / baud; /* 12MHz */ | |
403 | B <<= 1; /* Add one bit for rounding */ | |
404 | while (B > (512 << 1) && A <= 14) { | |
405 | A += 2; | |
406 | B >>= 2; | |
407 | } | |
408 | if (A > 14) { /* max. divisor = min. baudrate reached */ | |
409 | A = 14; | |
410 | B = 512; | |
411 | /* => ~45.78 baud */ | |
412 | } else { | |
413 | B = (B + 1) >> 1; /* Round the last bit */ | |
414 | } | |
415 | /* Handle special cases */ | |
416 | if (B == 512) | |
417 | B = 0; /* also: 1 to 8 */ | |
418 | else if (B < 16) | |
419 | /* | |
420 | * NOTE: With the current algorithm this happens | |
421 | * only for A=0 and means that the min. divisor | |
422 | * (respectively: the max. baudrate) is reached. | |
423 | */ | |
424 | B = 16; /* => 24 MBaud */ | |
425 | /* Encode the baud rate */ | |
426 | buf[3] = 0x80; /* Select divisor encoding method */ | |
427 | buf[2] = 0; | |
428 | buf[1] = (A & 0x0e); /* A */ | |
429 | buf[1] |= ((B & 0x100) >> 8); /* MSB of B */ | |
430 | buf[0] = B & 0xff; /* 8 LSBs of B */ | |
431 | /* Calculate the actual/resulting baud rate */ | |
432 | if (B <= 8) | |
433 | B = 512; | |
434 | baud = 12000000 * 32 / ((1 << A) * B); | |
435 | ||
436 | return baud; | |
437 | } | |
438 | ||
15e7cead JH |
439 | static void pl2303_encode_baudrate(struct tty_struct *tty, |
440 | struct usb_serial_port *port, | |
e917ba01 | 441 | enum pl2303_type type, |
15e7cead | 442 | u8 buf[4]) |
1da177e4 | 443 | { |
15e7cead | 444 | int baud; |
1da177e4 | 445 | |
95da310e | 446 | baud = tty_get_baud_rate(tty); |
d8789b2b | 447 | dev_dbg(&port->dev, "baud requested = %d\n", baud); |
b2d6d98f JH |
448 | if (!baud) |
449 | return; | |
e917ba01 FS |
450 | /* |
451 | * There are two methods for setting/encoding the baud rate | |
452 | * 1) Direct method: encodes the baud rate value directly | |
453 | * => supported by all chip types | |
454 | * 2) Divisor based method: encodes a divisor to a base value (12MHz*32) | |
09169197 | 455 | * => supported by HX chips (and likely not by type_0/1 chips) |
c23bda36 FS |
456 | * |
457 | * NOTE: Although the divisor based baud rate encoding method is much | |
458 | * more flexible, some of the standard baud rate values can not be | |
459 | * realized exactly. But the difference is very small (max. 0.2%) and | |
460 | * the device likely uses the same baud rate generator for both methods | |
461 | * so that there is likley no difference. | |
e917ba01 | 462 | */ |
09169197 | 463 | if (type == type_0 || type == type_1) |
e917ba01 FS |
464 | baud = pl2303_baudrate_encode_direct(baud, type, buf); |
465 | else | |
466 | baud = pl2303_baudrate_encode_divisor(baud, type, buf); | |
15e7cead | 467 | /* Save resulting baud rate */ |
b2d6d98f JH |
468 | tty_encode_baud_rate(tty, baud, baud); |
469 | dev_dbg(&port->dev, "baud set = %d\n", baud); | |
15e7cead JH |
470 | } |
471 | ||
472 | static void pl2303_set_termios(struct tty_struct *tty, | |
473 | struct usb_serial_port *port, struct ktermios *old_termios) | |
474 | { | |
475 | struct usb_serial *serial = port->serial; | |
476 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
477 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
478 | unsigned long flags; | |
15e7cead JH |
479 | unsigned char *buf; |
480 | int i; | |
481 | u8 control; | |
482 | ||
87265b45 JH |
483 | /* |
484 | * The PL2303 is reported to lose bytes if you change serial settings | |
485 | * even to the same values as before. Thus we actually need to filter | |
486 | * in this specific case. | |
487 | */ | |
15e7cead JH |
488 | if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) |
489 | return; | |
490 | ||
15e7cead JH |
491 | buf = kzalloc(7, GFP_KERNEL); |
492 | if (!buf) { | |
493 | dev_err(&port->dev, "%s - out of memory.\n", __func__); | |
494 | /* Report back no change occurred */ | |
495 | if (old_termios) | |
496 | tty->termios = *old_termios; | |
497 | return; | |
498 | } | |
499 | ||
500 | i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
501 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
502 | 0, 0, buf, 7, 100); | |
503 | dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); | |
504 | ||
87265b45 JH |
505 | if (C_CSIZE(tty)) { |
506 | switch (C_CSIZE(tty)) { | |
15e7cead JH |
507 | case CS5: |
508 | buf[6] = 5; | |
509 | break; | |
510 | case CS6: | |
511 | buf[6] = 6; | |
512 | break; | |
513 | case CS7: | |
514 | buf[6] = 7; | |
515 | break; | |
516 | default: | |
517 | case CS8: | |
518 | buf[6] = 8; | |
15e7cead JH |
519 | } |
520 | dev_dbg(&port->dev, "data bits = %d\n", buf[6]); | |
521 | } | |
522 | ||
e917ba01 FS |
523 | /* For reference: buf[0]:buf[3] baud rate value */ |
524 | pl2303_encode_baudrate(tty, port, spriv->type, buf); | |
15e7cead | 525 | |
1da177e4 LT |
526 | /* For reference buf[4]=0 is 1 stop bits */ |
527 | /* For reference buf[4]=1 is 1.5 stop bits */ | |
528 | /* For reference buf[4]=2 is 2 stop bits */ | |
87265b45 JH |
529 | if (C_CSTOPB(tty)) { |
530 | /* | |
531 | * NOTE: Comply with "real" UARTs / RS232: | |
29cf1b72 FS |
532 | * use 1.5 instead of 2 stop bits with 5 data bits |
533 | */ | |
87265b45 | 534 | if (C_CSIZE(tty) == CS5) { |
29cf1b72 | 535 | buf[4] = 1; |
d8789b2b | 536 | dev_dbg(&port->dev, "stop bits = 1.5\n"); |
29cf1b72 FS |
537 | } else { |
538 | buf[4] = 2; | |
d8789b2b | 539 | dev_dbg(&port->dev, "stop bits = 2\n"); |
29cf1b72 | 540 | } |
1da177e4 LT |
541 | } else { |
542 | buf[4] = 0; | |
d8789b2b | 543 | dev_dbg(&port->dev, "stop bits = 1\n"); |
1da177e4 LT |
544 | } |
545 | ||
87265b45 | 546 | if (C_PARENB(tty)) { |
1da177e4 LT |
547 | /* For reference buf[5]=0 is none parity */ |
548 | /* For reference buf[5]=1 is odd parity */ | |
549 | /* For reference buf[5]=2 is even parity */ | |
550 | /* For reference buf[5]=3 is mark parity */ | |
551 | /* For reference buf[5]=4 is space parity */ | |
87265b45 JH |
552 | if (C_PARODD(tty)) { |
553 | if (tty->termios.c_cflag & CMSPAR) { | |
6dd81b45 | 554 | buf[5] = 3; |
d8789b2b | 555 | dev_dbg(&port->dev, "parity = mark\n"); |
6dd81b45 FS |
556 | } else { |
557 | buf[5] = 1; | |
d8789b2b | 558 | dev_dbg(&port->dev, "parity = odd\n"); |
6dd81b45 | 559 | } |
1da177e4 | 560 | } else { |
87265b45 | 561 | if (tty->termios.c_cflag & CMSPAR) { |
6dd81b45 | 562 | buf[5] = 4; |
d8789b2b | 563 | dev_dbg(&port->dev, "parity = space\n"); |
6dd81b45 FS |
564 | } else { |
565 | buf[5] = 2; | |
d8789b2b | 566 | dev_dbg(&port->dev, "parity = even\n"); |
6dd81b45 | 567 | } |
1da177e4 LT |
568 | } |
569 | } else { | |
570 | buf[5] = 0; | |
d8789b2b | 571 | dev_dbg(&port->dev, "parity = none\n"); |
1da177e4 LT |
572 | } |
573 | ||
372db8a7 TG |
574 | i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
575 | SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, | |
576 | 0, 0, buf, 7, 100); | |
d8789b2b | 577 | dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i); |
1da177e4 LT |
578 | |
579 | /* change control lines if we are switching to or from B0 */ | |
580 | spin_lock_irqsave(&priv->lock, flags); | |
581 | control = priv->line_control; | |
87265b45 | 582 | if (C_BAUD(tty) == B0) |
1da177e4 | 583 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
2d8f4447 | 584 | else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) |
1da177e4 LT |
585 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); |
586 | if (control != priv->line_control) { | |
587 | control = priv->line_control; | |
588 | spin_unlock_irqrestore(&priv->lock, flags); | |
f45d0a5a | 589 | pl2303_set_control_lines(port, control); |
1da177e4 LT |
590 | } else { |
591 | spin_unlock_irqrestore(&priv->lock, flags); | |
592 | } | |
372db8a7 | 593 | |
87265b45 | 594 | memset(buf, 0, 7); |
372db8a7 TG |
595 | i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
596 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
597 | 0, 0, buf, 7, 100); | |
715cf92a | 598 | dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); |
1da177e4 | 599 | |
87265b45 | 600 | if (C_CRTSCTS(tty)) { |
034d1527 | 601 | if (spriv->type == type_0 || spriv->type == type_1) |
eb44da0b | 602 | pl2303_vendor_write(0x0, 0x41, serial); |
034d1527 FS |
603 | else |
604 | pl2303_vendor_write(0x0, 0x61, serial); | |
715f9527 | 605 | } else { |
eb44da0b | 606 | pl2303_vendor_write(0x0, 0x0, serial); |
1da177e4 | 607 | } |
572d3138 TG |
608 | |
609 | kfree(buf); | |
610 | } | |
611 | ||
335f8514 AC |
612 | static void pl2303_dtr_rts(struct usb_serial_port *port, int on) |
613 | { | |
614 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
615 | unsigned long flags; | |
616 | u8 control; | |
617 | ||
618 | spin_lock_irqsave(&priv->lock, flags); | |
619 | /* Change DTR and RTS */ | |
620 | if (on) | |
621 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
622 | else | |
623 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
624 | control = priv->line_control; | |
625 | spin_unlock_irqrestore(&priv->lock, flags); | |
f45d0a5a | 626 | pl2303_set_control_lines(port, control); |
335f8514 AC |
627 | } |
628 | ||
629 | static void pl2303_close(struct usb_serial_port *port) | |
572d3138 | 630 | { |
8b0127b2 | 631 | usb_serial_generic_close(port); |
572d3138 | 632 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 LT |
633 | } |
634 | ||
a509a7e4 | 635 | static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 636 | { |
1da177e4 | 637 | struct usb_serial *serial = port->serial; |
8bf769eb | 638 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); |
1da177e4 LT |
639 | int result; |
640 | ||
034d1527 | 641 | if (spriv->type == type_0 || spriv->type == type_1) { |
1694899f D |
642 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
643 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
3e152505 | 644 | } else { |
1da177e4 | 645 | /* reset upstream data pipes */ |
eb44da0b SS |
646 | pl2303_vendor_write(8, 0, serial); |
647 | pl2303_vendor_write(9, 0, serial); | |
1da177e4 LT |
648 | } |
649 | ||
1da177e4 | 650 | /* Setup termios */ |
95da310e | 651 | if (tty) |
2d8f4447 | 652 | pl2303_set_termios(tty, port, NULL); |
1da177e4 | 653 | |
372db8a7 | 654 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
1da177e4 | 655 | if (result) { |
372db8a7 | 656 | dev_err(&port->dev, "%s - failed submitting interrupt urb," |
441b62c1 | 657 | " error %d\n", __func__, result); |
db6e9186 | 658 | return result; |
1da177e4 | 659 | } |
d4691c3f | 660 | |
f5230a53 | 661 | result = usb_serial_generic_open(tty, port); |
d4691c3f JH |
662 | if (result) { |
663 | usb_kill_urb(port->interrupt_in_urb); | |
664 | return result; | |
665 | } | |
666 | ||
1da177e4 LT |
667 | return 0; |
668 | } | |
669 | ||
20b9d177 | 670 | static int pl2303_tiocmset(struct tty_struct *tty, |
372db8a7 | 671 | unsigned int set, unsigned int clear) |
1da177e4 | 672 | { |
95da310e | 673 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
674 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
675 | unsigned long flags; | |
676 | u8 control; | |
6f1efd6c | 677 | int ret; |
6fdd8e8e | 678 | |
372db8a7 | 679 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
680 | if (set & TIOCM_RTS) |
681 | priv->line_control |= CONTROL_RTS; | |
682 | if (set & TIOCM_DTR) | |
683 | priv->line_control |= CONTROL_DTR; | |
684 | if (clear & TIOCM_RTS) | |
685 | priv->line_control &= ~CONTROL_RTS; | |
686 | if (clear & TIOCM_DTR) | |
687 | priv->line_control &= ~CONTROL_DTR; | |
688 | control = priv->line_control; | |
372db8a7 | 689 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 690 | |
5ddbb26b JH |
691 | ret = pl2303_set_control_lines(port, control); |
692 | if (ret) | |
693 | return usb_translate_errors(ret); | |
6f1efd6c | 694 | |
5ddbb26b | 695 | return 0; |
1da177e4 LT |
696 | } |
697 | ||
60b33c13 | 698 | static int pl2303_tiocmget(struct tty_struct *tty) |
1da177e4 | 699 | { |
95da310e | 700 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
701 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
702 | unsigned long flags; | |
703 | unsigned int mcr; | |
704 | unsigned int status; | |
705 | unsigned int result; | |
706 | ||
372db8a7 | 707 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
708 | mcr = priv->line_control; |
709 | status = priv->line_status; | |
372db8a7 | 710 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
711 | |
712 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) | |
713 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) | |
714 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
715 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
716 | | ((status & UART_RING) ? TIOCM_RI : 0) | |
717 | | ((status & UART_DCD) ? TIOCM_CD : 0); | |
718 | ||
d8789b2b | 719 | dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); |
1da177e4 LT |
720 | |
721 | return result; | |
722 | } | |
723 | ||
335f8514 AC |
724 | static int pl2303_carrier_raised(struct usb_serial_port *port) |
725 | { | |
726 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
727 | if (priv->line_status & UART_DCD) | |
728 | return 1; | |
729 | return 0; | |
730 | } | |
731 | ||
824d11be | 732 | static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg) |
1da177e4 | 733 | { |
824d11be | 734 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
735 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
736 | unsigned long flags; | |
737 | unsigned int prevstatus; | |
738 | unsigned int status; | |
739 | unsigned int changed; | |
740 | ||
372db8a7 | 741 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 742 | prevstatus = priv->line_status; |
372db8a7 | 743 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
744 | |
745 | while (1) { | |
6d0cad65 | 746 | interruptible_sleep_on(&port->port.delta_msr_wait); |
1da177e4 LT |
747 | /* see if a signal did it */ |
748 | if (signal_pending(current)) | |
749 | return -ERESTARTSYS; | |
372db8a7 | 750 | |
40509ca9 JH |
751 | if (port->serial->disconnected) |
752 | return -EIO; | |
753 | ||
372db8a7 | 754 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 755 | status = priv->line_status; |
372db8a7 TG |
756 | spin_unlock_irqrestore(&priv->lock, flags); |
757 | ||
3a0f43e9 | 758 | changed = prevstatus ^ status; |
372db8a7 | 759 | |
1da177e4 LT |
760 | if (((arg & TIOCM_RNG) && (changed & UART_RING)) || |
761 | ((arg & TIOCM_DSR) && (changed & UART_DSR)) || | |
762 | ((arg & TIOCM_CD) && (changed & UART_DCD)) || | |
3a0f43e9 | 763 | ((arg & TIOCM_CTS) && (changed & UART_CTS))) { |
1da177e4 LT |
764 | return 0; |
765 | } | |
766 | prevstatus = status; | |
767 | } | |
768 | /* NOTREACHED */ | |
769 | return 0; | |
770 | } | |
771 | ||
00a0d0d6 | 772 | static int pl2303_ioctl(struct tty_struct *tty, |
372db8a7 | 773 | unsigned int cmd, unsigned long arg) |
1da177e4 | 774 | { |
67b9946d | 775 | struct serial_struct ser; |
95da310e | 776 | struct usb_serial_port *port = tty->driver_data; |
d8789b2b GKH |
777 | |
778 | dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd); | |
1da177e4 LT |
779 | |
780 | switch (cmd) { | |
67b9946d JT |
781 | case TIOCGSERIAL: |
782 | memset(&ser, 0, sizeof ser); | |
783 | ser.type = PORT_16654; | |
e5b1e206 | 784 | ser.line = port->minor; |
1143832e | 785 | ser.port = port->port_number; |
67b9946d JT |
786 | ser.baud_base = 460800; |
787 | ||
788 | if (copy_to_user((void __user *)arg, &ser, sizeof ser)) | |
789 | return -EFAULT; | |
790 | ||
791 | return 0; | |
3a0f43e9 | 792 | default: |
d8789b2b | 793 | dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd); |
3a0f43e9 | 794 | break; |
1da177e4 | 795 | } |
1da177e4 LT |
796 | return -ENOIOCTLCMD; |
797 | } | |
798 | ||
95da310e | 799 | static void pl2303_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 800 | { |
95da310e | 801 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
802 | struct usb_serial *serial = port->serial; |
803 | u16 state; | |
804 | int result; | |
805 | ||
1da177e4 LT |
806 | if (break_state == 0) |
807 | state = BREAK_OFF; | |
808 | else | |
809 | state = BREAK_ON; | |
d8789b2b | 810 | dev_dbg(&port->dev, "%s - turning break %s\n", __func__, |
3a0f43e9 | 811 | state == BREAK_OFF ? "off" : "on"); |
1da177e4 | 812 | |
372db8a7 TG |
813 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
814 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, | |
815 | 0, NULL, 0, 100); | |
1da177e4 | 816 | if (result) |
d8789b2b | 817 | dev_err(&port->dev, "error sending break = %d\n", result); |
1da177e4 LT |
818 | } |
819 | ||
97bb13ec FL |
820 | static void pl2303_update_line_status(struct usb_serial_port *port, |
821 | unsigned char *data, | |
822 | unsigned int actual_length) | |
823 | { | |
824 | ||
825 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
d14fc1a7 | 826 | struct tty_struct *tty; |
97bb13ec FL |
827 | unsigned long flags; |
828 | u8 status_idx = UART_STATE; | |
95f209f9 | 829 | u8 length = UART_STATE + 1; |
d14fc1a7 | 830 | u8 prev_line_status; |
9c537616 | 831 | u16 idv, idp; |
97bb13ec | 832 | |
9c537616 TG |
833 | idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); |
834 | idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); | |
835 | ||
836 | ||
837 | if (idv == SIEMENS_VENDOR_ID) { | |
838 | if (idp == SIEMENS_PRODUCT_ID_X65 || | |
839 | idp == SIEMENS_PRODUCT_ID_SX1 || | |
840 | idp == SIEMENS_PRODUCT_ID_X75) { | |
841 | ||
842 | length = 1; | |
843 | status_idx = 0; | |
844 | } | |
97bb13ec FL |
845 | } |
846 | ||
847 | if (actual_length < length) | |
a009b75a | 848 | return; |
97bb13ec | 849 | |
3a0f43e9 | 850 | /* Save off the uart status for others to look at */ |
97bb13ec | 851 | spin_lock_irqsave(&priv->lock, flags); |
d14fc1a7 | 852 | prev_line_status = priv->line_status; |
97bb13ec FL |
853 | priv->line_status = data[status_idx]; |
854 | spin_unlock_irqrestore(&priv->lock, flags); | |
430eb0d2 JW |
855 | if (priv->line_status & UART_BREAK_ERROR) |
856 | usb_serial_handle_break(port); | |
6d0cad65 | 857 | wake_up_interruptible(&port->port.delta_msr_wait); |
d14fc1a7 LP |
858 | |
859 | tty = tty_port_tty_get(&port->port); | |
860 | if (!tty) | |
861 | return; | |
862 | if ((priv->line_status ^ prev_line_status) & UART_DCD) | |
863 | usb_serial_handle_dcd_change(port, tty, | |
864 | priv->line_status & UART_DCD); | |
865 | tty_kref_put(tty); | |
97bb13ec | 866 | } |
1da177e4 | 867 | |
7d12e780 | 868 | static void pl2303_read_int_callback(struct urb *urb) |
1da177e4 | 869 | { |
cdc97792 | 870 | struct usb_serial_port *port = urb->context; |
1da177e4 | 871 | unsigned char *data = urb->transfer_buffer; |
97bb13ec | 872 | unsigned int actual_length = urb->actual_length; |
461d696a GKH |
873 | int status = urb->status; |
874 | int retval; | |
1da177e4 | 875 | |
461d696a | 876 | switch (status) { |
1da177e4 LT |
877 | case 0: |
878 | /* success */ | |
879 | break; | |
880 | case -ECONNRESET: | |
881 | case -ENOENT: | |
882 | case -ESHUTDOWN: | |
883 | /* this urb is terminated, clean up */ | |
d8789b2b GKH |
884 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
885 | __func__, status); | |
1da177e4 LT |
886 | return; |
887 | default: | |
d8789b2b GKH |
888 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
889 | __func__, status); | |
1da177e4 LT |
890 | goto exit; |
891 | } | |
892 | ||
59d33f2f | 893 | usb_serial_debug_data(&port->dev, __func__, |
372db8a7 TG |
894 | urb->actual_length, urb->transfer_buffer); |
895 | ||
97bb13ec | 896 | pl2303_update_line_status(port, data, actual_length); |
1da177e4 | 897 | |
1da177e4 | 898 | exit: |
461d696a GKH |
899 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
900 | if (retval) | |
d8789b2b | 901 | dev_err(&port->dev, |
372db8a7 | 902 | "%s - usb_submit_urb failed with result %d\n", |
441b62c1 | 903 | __func__, retval); |
1da177e4 LT |
904 | } |
905 | ||
f08e07ac | 906 | static void pl2303_process_read_urb(struct urb *urb) |
d4fc4a7b | 907 | { |
f08e07ac JH |
908 | struct usb_serial_port *port = urb->context; |
909 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
d4fc4a7b | 910 | unsigned char *data = urb->transfer_buffer; |
d4fc4a7b | 911 | char tty_flag = TTY_NORMAL; |
f08e07ac JH |
912 | unsigned long flags; |
913 | u8 line_status; | |
914 | int i; | |
915 | ||
916 | /* update line status */ | |
917 | spin_lock_irqsave(&priv->lock, flags); | |
918 | line_status = priv->line_status; | |
919 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; | |
920 | spin_unlock_irqrestore(&priv->lock, flags); | |
6d0cad65 | 921 | wake_up_interruptible(&port->port.delta_msr_wait); |
f08e07ac JH |
922 | |
923 | if (!urb->actual_length) | |
924 | return; | |
925 | ||
d4fc4a7b AC |
926 | /* break takes precedence over parity, */ |
927 | /* which takes precedence over framing errors */ | |
928 | if (line_status & UART_BREAK_ERROR) | |
929 | tty_flag = TTY_BREAK; | |
930 | else if (line_status & UART_PARITY_ERROR) | |
931 | tty_flag = TTY_PARITY; | |
932 | else if (line_status & UART_FRAME_ERROR) | |
933 | tty_flag = TTY_FRAME; | |
d4fc4a7b | 934 | |
3ba19fe3 JH |
935 | if (tty_flag != TTY_NORMAL) |
936 | dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, | |
937 | tty_flag); | |
d4fc4a7b AC |
938 | /* overrun is special, not associated with a char */ |
939 | if (line_status & UART_OVERRUN_ERROR) | |
92a19f9c | 940 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
9388e2e7 | 941 | |
d45cc8df | 942 | if (port->port.console && port->sysrq) { |
d4fc4a7b | 943 | for (i = 0; i < urb->actual_length; ++i) |
6ee9f4b4 | 944 | if (!usb_serial_handle_sysrq_char(port, data[i])) |
92a19f9c JS |
945 | tty_insert_flip_char(&port->port, data[i], |
946 | tty_flag); | |
d45cc8df | 947 | } else { |
2f693357 | 948 | tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, |
d45cc8df | 949 | urb->actual_length); |
9388e2e7 | 950 | } |
1da177e4 | 951 | |
2e124b4a | 952 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
953 | } |
954 | ||
572d3138 TG |
955 | /* All of the device info needed for the PL2303 SIO serial converter */ |
956 | static struct usb_serial_driver pl2303_device = { | |
957 | .driver = { | |
958 | .owner = THIS_MODULE, | |
959 | .name = "pl2303", | |
960 | }, | |
961 | .id_table = id_table, | |
572d3138 | 962 | .num_ports = 1, |
7919c2fd | 963 | .bulk_in_size = 256, |
3efeaff6 | 964 | .bulk_out_size = 256, |
572d3138 TG |
965 | .open = pl2303_open, |
966 | .close = pl2303_close, | |
335f8514 AC |
967 | .dtr_rts = pl2303_dtr_rts, |
968 | .carrier_raised = pl2303_carrier_raised, | |
572d3138 TG |
969 | .ioctl = pl2303_ioctl, |
970 | .break_ctl = pl2303_break_ctl, | |
971 | .set_termios = pl2303_set_termios, | |
972 | .tiocmget = pl2303_tiocmget, | |
973 | .tiocmset = pl2303_tiocmset, | |
824d11be | 974 | .tiocmiwait = pl2303_tiocmiwait, |
f08e07ac | 975 | .process_read_urb = pl2303_process_read_urb, |
572d3138 | 976 | .read_int_callback = pl2303_read_int_callback, |
572d3138 | 977 | .attach = pl2303_startup, |
f9c99bb8 | 978 | .release = pl2303_release, |
8bf769eb JH |
979 | .port_probe = pl2303_port_probe, |
980 | .port_remove = pl2303_port_remove, | |
572d3138 | 981 | }; |
1da177e4 | 982 | |
f667ddad AS |
983 | static struct usb_serial_driver * const serial_drivers[] = { |
984 | &pl2303_device, NULL | |
985 | }; | |
986 | ||
68e24113 | 987 | module_usb_serial_driver(serial_drivers, id_table); |
1da177e4 LT |
988 | |
989 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 990 | MODULE_LICENSE("GPL"); |