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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 LT |
15 | */ |
16 | ||
1da177e4 LT |
17 | #include <linux/kernel.h> |
18 | #include <linux/errno.h> | |
1da177e4 LT |
19 | #include <linux/slab.h> |
20 | #include <linux/tty.h> | |
21 | #include <linux/tty_driver.h> | |
22 | #include <linux/tty_flip.h> | |
23 | #include <linux/serial.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/moduleparam.h> | |
26 | #include <linux/spinlock.h> | |
3a0f43e9 | 27 | #include <linux/uaccess.h> |
1da177e4 | 28 | #include <linux/usb.h> |
a969888c | 29 | #include <linux/usb/serial.h> |
b2d6d98f | 30 | #include <asm/unaligned.h> |
1da177e4 LT |
31 | #include "pl2303.h" |
32 | ||
228e4105 JH |
33 | |
34 | #define PL2303_QUIRK_UART_STATE_IDX0 BIT(0) | |
23c6acb9 | 35 | #define PL2303_QUIRK_LEGACY BIT(1) |
228e4105 | 36 | |
7d40d7e8 | 37 | static const struct usb_device_id id_table[] = { |
1da177e4 LT |
38 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, |
39 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, | |
3d861494 | 40 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, |
1da177e4 LT |
41 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, |
42 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, | |
b483b6aa | 43 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, |
4be2fa18 | 44 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, |
727df356 | 45 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, |
18344a1c | 46 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, |
96a3e79e | 47 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) }, |
91fcb1ce | 48 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ZTEK) }, |
1da177e4 | 49 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
8a28dea3 | 50 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, |
1da177e4 LT |
51 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
52 | { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, | |
53 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, | |
54 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, | |
55 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, | |
58381719 | 56 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, |
1da177e4 LT |
57 | { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
58 | { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, | |
59 | { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, | |
60 | { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, | |
61 | { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, | |
62 | { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, | |
63 | { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, | |
228e4105 JH |
64 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1), |
65 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
66 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65), | |
67 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
68 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75), | |
69 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
e7beb667 | 70 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) }, |
912299f6 | 71 | { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ |
acbb36f1 | 72 | { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, |
c6c27721 CL |
73 | { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, |
74 | { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, | |
6cceb05f | 75 | { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, |
c6c27721 | 76 | { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, |
491b04ce | 77 | { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, |
3b928474 | 78 | { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, |
b7aa94b6 | 79 | { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, |
8fd80133 | 80 | { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, |
2d94b981 | 81 | { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, |
9e3285db | 82 | { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, |
cc311ee7 | 83 | { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, |
7c992001 | 84 | { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, |
af4b8514 | 85 | { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, |
b16c02fb AS |
86 | { USB_DEVICE(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) }, |
87 | { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) }, | |
88 | { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) }, | |
8540d666 | 89 | { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, |
f36ecd5d | 90 | { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, |
49276560 | 91 | { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, |
35904e6b | 92 | { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, |
9a61d726 | 93 | { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, |
598f0b70 | 94 | { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, |
1da177e4 LT |
95 | { } /* Terminating entry */ |
96 | }; | |
97 | ||
372db8a7 | 98 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 99 | |
1da177e4 LT |
100 | #define SET_LINE_REQUEST_TYPE 0x21 |
101 | #define SET_LINE_REQUEST 0x20 | |
102 | ||
103 | #define SET_CONTROL_REQUEST_TYPE 0x21 | |
104 | #define SET_CONTROL_REQUEST 0x22 | |
105 | #define CONTROL_DTR 0x01 | |
106 | #define CONTROL_RTS 0x02 | |
107 | ||
108 | #define BREAK_REQUEST_TYPE 0x21 | |
3a0f43e9 | 109 | #define BREAK_REQUEST 0x23 |
1da177e4 LT |
110 | #define BREAK_ON 0xffff |
111 | #define BREAK_OFF 0x0000 | |
112 | ||
113 | #define GET_LINE_REQUEST_TYPE 0xa1 | |
114 | #define GET_LINE_REQUEST 0x21 | |
115 | ||
116 | #define VENDOR_WRITE_REQUEST_TYPE 0x40 | |
117 | #define VENDOR_WRITE_REQUEST 0x01 | |
118 | ||
119 | #define VENDOR_READ_REQUEST_TYPE 0xc0 | |
120 | #define VENDOR_READ_REQUEST 0x01 | |
121 | ||
228e4105 | 122 | #define UART_STATE_INDEX 8 |
dbfd2866 | 123 | #define UART_STATE_MSR_MASK 0x8b |
1da177e4 LT |
124 | #define UART_STATE_TRANSIENT_MASK 0x74 |
125 | #define UART_DCD 0x01 | |
126 | #define UART_DSR 0x02 | |
127 | #define UART_BREAK_ERROR 0x04 | |
128 | #define UART_RING 0x08 | |
129 | #define UART_FRAME_ERROR 0x10 | |
130 | #define UART_PARITY_ERROR 0x20 | |
131 | #define UART_OVERRUN_ERROR 0x40 | |
132 | #define UART_CTS 0x80 | |
133 | ||
52772a7f | 134 | static void pl2303_set_break(struct usb_serial_port *port, bool enable); |
1da177e4 LT |
135 | |
136 | enum pl2303_type { | |
7f966ac7 JH |
137 | TYPE_01, /* Type 0 and 1 (difference unknown) */ |
138 | TYPE_HX, /* HX version of the pl2303 chip */ | |
359defda JH |
139 | TYPE_COUNT |
140 | }; | |
141 | ||
142 | struct pl2303_type_data { | |
143 | speed_t max_baud_rate; | |
144 | unsigned long quirks; | |
1da177e4 LT |
145 | }; |
146 | ||
8bf769eb | 147 | struct pl2303_serial_private { |
b6934681 | 148 | const struct pl2303_type_data *type; |
228e4105 | 149 | unsigned long quirks; |
8bf769eb JH |
150 | }; |
151 | ||
1da177e4 LT |
152 | struct pl2303_private { |
153 | spinlock_t lock; | |
1da177e4 LT |
154 | u8 line_control; |
155 | u8 line_status; | |
623c8263 JH |
156 | |
157 | u8 line_settings[7]; | |
1da177e4 LT |
158 | }; |
159 | ||
b6934681 | 160 | static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { |
359defda JH |
161 | [TYPE_01] = { |
162 | .max_baud_rate = 1228800, | |
163 | .quirks = PL2303_QUIRK_LEGACY, | |
164 | }, | |
399aa9a7 LH |
165 | [TYPE_HX] = { |
166 | .max_baud_rate = 12000000, | |
167 | }, | |
359defda JH |
168 | }; |
169 | ||
362eb026 JH |
170 | static int pl2303_vendor_read(struct usb_serial *serial, u16 value, |
171 | unsigned char buf[1]) | |
eb44da0b | 172 | { |
362eb026 | 173 | struct device *dev = &serial->interface->dev; |
ccfe8188 JH |
174 | int res; |
175 | ||
176 | res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
eb44da0b | 177 | VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, |
362eb026 JH |
178 | value, 0, buf, 1, 100); |
179 | if (res != 1) { | |
180 | dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, | |
181 | value, res); | |
182 | if (res >= 0) | |
183 | res = -EIO; | |
184 | ||
185 | return res; | |
186 | } | |
ccfe8188 | 187 | |
362eb026 | 188 | dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); |
ccfe8188 | 189 | |
362eb026 | 190 | return 0; |
eb44da0b SS |
191 | } |
192 | ||
362eb026 | 193 | static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) |
eb44da0b | 194 | { |
362eb026 | 195 | struct device *dev = &serial->interface->dev; |
ccfe8188 JH |
196 | int res; |
197 | ||
362eb026 JH |
198 | dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); |
199 | ||
ccfe8188 | 200 | res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
eb44da0b SS |
201 | VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, |
202 | value, index, NULL, 0, 100); | |
362eb026 JH |
203 | if (res) { |
204 | dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, | |
205 | value, res); | |
206 | return res; | |
207 | } | |
ccfe8188 | 208 | |
362eb026 | 209 | return 0; |
eb44da0b SS |
210 | } |
211 | ||
228e4105 JH |
212 | static int pl2303_probe(struct usb_serial *serial, |
213 | const struct usb_device_id *id) | |
214 | { | |
215 | usb_set_serial_data(serial, (void *)id->driver_info); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
372db8a7 | 220 | static int pl2303_startup(struct usb_serial *serial) |
1da177e4 | 221 | { |
8bf769eb | 222 | struct pl2303_serial_private *spriv; |
7f966ac7 | 223 | enum pl2303_type type = TYPE_01; |
3e152505 | 224 | unsigned char *buf; |
8bf769eb JH |
225 | |
226 | spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); | |
227 | if (!spriv) | |
228 | return -ENOMEM; | |
1da177e4 | 229 | |
362eb026 | 230 | buf = kmalloc(1, GFP_KERNEL); |
8bf769eb JH |
231 | if (!buf) { |
232 | kfree(spriv); | |
3e152505 | 233 | return -ENOMEM; |
8bf769eb | 234 | } |
3e152505 | 235 | |
b52e1113 | 236 | if (serial->dev->descriptor.bDeviceClass == 0x02) |
7f966ac7 | 237 | type = TYPE_01; /* type 0 */ |
b52e1113 | 238 | else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) |
7f966ac7 | 239 | type = TYPE_HX; |
281393ad | 240 | else if (serial->dev->descriptor.bDeviceClass == 0x00) |
7f966ac7 | 241 | type = TYPE_01; /* type 1 */ |
281393ad | 242 | else if (serial->dev->descriptor.bDeviceClass == 0xFF) |
7f966ac7 | 243 | type = TYPE_01; /* type 1 */ |
b52e1113 | 244 | dev_dbg(&serial->interface->dev, "device type: %d\n", type); |
1da177e4 | 245 | |
359defda | 246 | spriv->type = &pl2303_type_data[type]; |
228e4105 | 247 | spriv->quirks = (unsigned long)usb_get_serial_data(serial); |
359defda | 248 | spriv->quirks |= spriv->type->quirks; |
228e4105 | 249 | |
8bf769eb | 250 | usb_set_serial_data(serial, spriv); |
3e152505 | 251 | |
362eb026 JH |
252 | pl2303_vendor_read(serial, 0x8484, buf); |
253 | pl2303_vendor_write(serial, 0x0404, 0); | |
254 | pl2303_vendor_read(serial, 0x8484, buf); | |
255 | pl2303_vendor_read(serial, 0x8383, buf); | |
256 | pl2303_vendor_read(serial, 0x8484, buf); | |
257 | pl2303_vendor_write(serial, 0x0404, 1); | |
258 | pl2303_vendor_read(serial, 0x8484, buf); | |
259 | pl2303_vendor_read(serial, 0x8383, buf); | |
260 | pl2303_vendor_write(serial, 0, 1); | |
261 | pl2303_vendor_write(serial, 1, 0); | |
23c6acb9 | 262 | if (spriv->quirks & PL2303_QUIRK_LEGACY) |
362eb026 | 263 | pl2303_vendor_write(serial, 2, 0x24); |
7f966ac7 JH |
264 | else |
265 | pl2303_vendor_write(serial, 2, 0x44); | |
3e152505 SS |
266 | |
267 | kfree(buf); | |
ccfe8188 | 268 | |
1da177e4 | 269 | return 0; |
8bf769eb | 270 | } |
1da177e4 | 271 | |
8bf769eb JH |
272 | static void pl2303_release(struct usb_serial *serial) |
273 | { | |
ccfe8188 | 274 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); |
8bf769eb | 275 | |
8bf769eb JH |
276 | kfree(spriv); |
277 | } | |
278 | ||
279 | static int pl2303_port_probe(struct usb_serial_port *port) | |
280 | { | |
281 | struct pl2303_private *priv; | |
282 | ||
283 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
284 | if (!priv) | |
285 | return -ENOMEM; | |
286 | ||
287 | spin_lock_init(&priv->lock); | |
8bf769eb JH |
288 | |
289 | usb_set_serial_port_data(port, priv); | |
290 | ||
d7be6221 JH |
291 | port->port.drain_delay = 256; |
292 | ||
8bf769eb JH |
293 | return 0; |
294 | } | |
295 | ||
296 | static int pl2303_port_remove(struct usb_serial_port *port) | |
297 | { | |
ccfe8188 | 298 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
8bf769eb | 299 | |
8bf769eb JH |
300 | kfree(priv); |
301 | ||
302 | return 0; | |
1da177e4 LT |
303 | } |
304 | ||
f45d0a5a | 305 | static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) |
1da177e4 | 306 | { |
f45d0a5a | 307 | struct usb_device *dev = port->serial->dev; |
1da177e4 | 308 | int retval; |
3a0f43e9 | 309 | |
a6ec8245 JH |
310 | dev_dbg(&port->dev, "%s - %02x\n", __func__, value); |
311 | ||
372db8a7 TG |
312 | retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
313 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, | |
314 | value, 0, NULL, 0, 100); | |
a6ec8245 JH |
315 | if (retval) |
316 | dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); | |
ccfe8188 | 317 | |
1da177e4 LT |
318 | return retval; |
319 | } | |
320 | ||
59afe10e | 321 | /* |
5d85045f JH |
322 | * Returns the nearest supported baud rate that can be set directly without |
323 | * using divisors. | |
59afe10e JH |
324 | */ |
325 | static speed_t pl2303_get_supported_baud_rate(speed_t baud) | |
1da177e4 | 326 | { |
59afe10e JH |
327 | static const speed_t baud_sup[] = { |
328 | 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, | |
329 | 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, | |
5d85045f | 330 | 614400, 921600, 1228800, 2457600, 3000000, 6000000 |
59afe10e | 331 | }; |
1da177e4 | 332 | |
59afe10e | 333 | unsigned i; |
692ed4dd | 334 | |
7e12a6fc GKH |
335 | for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { |
336 | if (baud_sup[i] > baud) | |
337 | break; | |
338 | } | |
692ed4dd | 339 | |
7e12a6fc GKH |
340 | if (i == ARRAY_SIZE(baud_sup)) |
341 | baud = baud_sup[i - 1]; | |
342 | else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) | |
343 | baud = baud_sup[i - 1]; | |
344 | else | |
345 | baud = baud_sup[i]; | |
692ed4dd | 346 | |
59afe10e JH |
347 | return baud; |
348 | } | |
349 | ||
20b4c787 JH |
350 | /* |
351 | * NOTE: If unsupported baud rates are set directly, the PL2303 seems to | |
352 | * use 9600 baud. | |
353 | */ | |
354 | static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], | |
355 | speed_t baud) | |
356 | { | |
357 | put_unaligned_le32(baud, buf); | |
358 | ||
359 | return baud; | |
360 | } | |
361 | ||
c82c6d45 JH |
362 | static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], |
363 | speed_t baud) | |
364 | { | |
49bda212 | 365 | unsigned int baseline, mantissa, exponent; |
c82c6d45 JH |
366 | |
367 | /* | |
368 | * Apparently the formula is: | |
49bda212 MP |
369 | * baudrate = 12M * 32 / (mantissa * 4^exponent) |
370 | * where | |
371 | * mantissa = buf[8:0] | |
372 | * exponent = buf[11:9] | |
c82c6d45 | 373 | */ |
49bda212 MP |
374 | baseline = 12000000 * 32; |
375 | mantissa = baseline / baud; | |
376 | if (mantissa == 0) | |
377 | mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ | |
378 | exponent = 0; | |
379 | while (mantissa >= 512) { | |
380 | if (exponent < 7) { | |
381 | mantissa >>= 2; /* divide by 4 */ | |
382 | exponent++; | |
383 | } else { | |
384 | /* Exponent is maxed. Trim mantissa and leave. */ | |
385 | mantissa = 511; | |
386 | break; | |
387 | } | |
388 | } | |
389 | ||
c82c6d45 JH |
390 | buf[3] = 0x80; |
391 | buf[2] = 0; | |
49bda212 MP |
392 | buf[1] = exponent << 1 | mantissa >> 8; |
393 | buf[0] = mantissa & 0xff; | |
394 | ||
395 | /* Calculate and return the exact baud rate. */ | |
396 | baud = (baseline / mantissa) >> (exponent << 1); | |
c82c6d45 JH |
397 | |
398 | return baud; | |
399 | } | |
400 | ||
59afe10e JH |
401 | static void pl2303_encode_baud_rate(struct tty_struct *tty, |
402 | struct usb_serial_port *port, | |
403 | u8 buf[4]) | |
404 | { | |
405 | struct usb_serial *serial = port->serial; | |
406 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
5d85045f | 407 | speed_t baud_sup; |
59afe10e JH |
408 | speed_t baud; |
409 | ||
410 | baud = tty_get_baud_rate(tty); | |
411 | dev_dbg(&port->dev, "baud requested = %u\n", baud); | |
412 | if (!baud) | |
413 | return; | |
871996ed JH |
414 | |
415 | if (spriv->type->max_baud_rate) | |
416 | baud = min_t(speed_t, baud, spriv->type->max_baud_rate); | |
5d85045f | 417 | /* |
399aa9a7 | 418 | * Use direct method for supported baud rates, otherwise use divisors. |
5d85045f JH |
419 | */ |
420 | baud_sup = pl2303_get_supported_baud_rate(baud); | |
20b4c787 | 421 | |
399aa9a7 LH |
422 | if (baud == baud_sup) |
423 | baud = pl2303_encode_baud_rate_direct(buf, baud); | |
5d85045f | 424 | else |
399aa9a7 | 425 | baud = pl2303_encode_baud_rate_divisor(buf, baud); |
692ed4dd | 426 | |
15e7cead | 427 | /* Save resulting baud rate */ |
b2d6d98f | 428 | tty_encode_baud_rate(tty, baud, baud); |
f84ee3b2 | 429 | dev_dbg(&port->dev, "baud set = %u\n", baud); |
15e7cead JH |
430 | } |
431 | ||
383d19c5 JH |
432 | static int pl2303_get_line_request(struct usb_serial_port *port, |
433 | unsigned char buf[7]) | |
434 | { | |
435 | struct usb_device *udev = port->serial->dev; | |
436 | int ret; | |
437 | ||
438 | ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), | |
439 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
440 | 0, 0, buf, 7, 100); | |
441 | if (ret != 7) { | |
442 | dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); | |
443 | ||
444 | if (ret > 0) | |
445 | ret = -EIO; | |
446 | ||
447 | return ret; | |
448 | } | |
449 | ||
450 | dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | static int pl2303_set_line_request(struct usb_serial_port *port, | |
456 | unsigned char buf[7]) | |
457 | { | |
458 | struct usb_device *udev = port->serial->dev; | |
459 | int ret; | |
460 | ||
461 | ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
462 | SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, | |
463 | 0, 0, buf, 7, 100); | |
464 | if (ret != 7) { | |
465 | dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); | |
466 | ||
467 | if (ret > 0) | |
468 | ret = -EIO; | |
469 | ||
470 | return ret; | |
471 | } | |
472 | ||
473 | dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
15e7cead JH |
478 | static void pl2303_set_termios(struct tty_struct *tty, |
479 | struct usb_serial_port *port, struct ktermios *old_termios) | |
480 | { | |
481 | struct usb_serial *serial = port->serial; | |
482 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
483 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
484 | unsigned long flags; | |
15e7cead | 485 | unsigned char *buf; |
383d19c5 | 486 | int ret; |
15e7cead JH |
487 | u8 control; |
488 | ||
15e7cead JH |
489 | if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) |
490 | return; | |
491 | ||
15e7cead JH |
492 | buf = kzalloc(7, GFP_KERNEL); |
493 | if (!buf) { | |
15e7cead JH |
494 | /* Report back no change occurred */ |
495 | if (old_termios) | |
496 | tty->termios = *old_termios; | |
497 | return; | |
498 | } | |
499 | ||
383d19c5 | 500 | pl2303_get_line_request(port, buf); |
15e7cead | 501 | |
a3132499 CL |
502 | switch (C_CSIZE(tty)) { |
503 | case CS5: | |
504 | buf[6] = 5; | |
505 | break; | |
506 | case CS6: | |
507 | buf[6] = 6; | |
508 | break; | |
509 | case CS7: | |
510 | buf[6] = 7; | |
511 | break; | |
512 | default: | |
513 | case CS8: | |
514 | buf[6] = 8; | |
15e7cead | 515 | } |
a3132499 | 516 | dev_dbg(&port->dev, "data bits = %d\n", buf[6]); |
15e7cead | 517 | |
692ed4dd | 518 | /* For reference buf[0]:buf[3] baud rate value */ |
79816824 | 519 | pl2303_encode_baud_rate(tty, port, &buf[0]); |
15e7cead | 520 | |
1da177e4 LT |
521 | /* For reference buf[4]=0 is 1 stop bits */ |
522 | /* For reference buf[4]=1 is 1.5 stop bits */ | |
523 | /* For reference buf[4]=2 is 2 stop bits */ | |
87265b45 JH |
524 | if (C_CSTOPB(tty)) { |
525 | /* | |
526 | * NOTE: Comply with "real" UARTs / RS232: | |
29cf1b72 FS |
527 | * use 1.5 instead of 2 stop bits with 5 data bits |
528 | */ | |
87265b45 | 529 | if (C_CSIZE(tty) == CS5) { |
29cf1b72 | 530 | buf[4] = 1; |
d8789b2b | 531 | dev_dbg(&port->dev, "stop bits = 1.5\n"); |
29cf1b72 FS |
532 | } else { |
533 | buf[4] = 2; | |
d8789b2b | 534 | dev_dbg(&port->dev, "stop bits = 2\n"); |
29cf1b72 | 535 | } |
1da177e4 LT |
536 | } else { |
537 | buf[4] = 0; | |
d8789b2b | 538 | dev_dbg(&port->dev, "stop bits = 1\n"); |
1da177e4 LT |
539 | } |
540 | ||
87265b45 | 541 | if (C_PARENB(tty)) { |
1da177e4 LT |
542 | /* For reference buf[5]=0 is none parity */ |
543 | /* For reference buf[5]=1 is odd parity */ | |
544 | /* For reference buf[5]=2 is even parity */ | |
545 | /* For reference buf[5]=3 is mark parity */ | |
546 | /* For reference buf[5]=4 is space parity */ | |
87265b45 | 547 | if (C_PARODD(tty)) { |
619c4354 | 548 | if (C_CMSPAR(tty)) { |
6dd81b45 | 549 | buf[5] = 3; |
d8789b2b | 550 | dev_dbg(&port->dev, "parity = mark\n"); |
6dd81b45 FS |
551 | } else { |
552 | buf[5] = 1; | |
d8789b2b | 553 | dev_dbg(&port->dev, "parity = odd\n"); |
6dd81b45 | 554 | } |
1da177e4 | 555 | } else { |
619c4354 | 556 | if (C_CMSPAR(tty)) { |
6dd81b45 | 557 | buf[5] = 4; |
d8789b2b | 558 | dev_dbg(&port->dev, "parity = space\n"); |
6dd81b45 FS |
559 | } else { |
560 | buf[5] = 2; | |
d8789b2b | 561 | dev_dbg(&port->dev, "parity = even\n"); |
6dd81b45 | 562 | } |
1da177e4 LT |
563 | } |
564 | } else { | |
565 | buf[5] = 0; | |
d8789b2b | 566 | dev_dbg(&port->dev, "parity = none\n"); |
1da177e4 LT |
567 | } |
568 | ||
623c8263 JH |
569 | /* |
570 | * Some PL2303 are known to lose bytes if you change serial settings | |
571 | * even to the same values as before. Thus we actually need to filter | |
572 | * in this specific case. | |
573 | * | |
574 | * Note that the tty_termios_hw_change check above is not sufficient | |
575 | * as a previously requested baud rate may differ from the one | |
576 | * actually used (and stored in old_termios). | |
577 | * | |
578 | * NOTE: No additional locking needed for line_settings as it is | |
579 | * only used in set_termios, which is serialised against itself. | |
580 | */ | |
581 | if (!old_termios || memcmp(buf, priv->line_settings, 7)) { | |
383d19c5 JH |
582 | ret = pl2303_set_line_request(port, buf); |
583 | if (!ret) | |
623c8263 JH |
584 | memcpy(priv->line_settings, buf, 7); |
585 | } | |
1da177e4 LT |
586 | |
587 | /* change control lines if we are switching to or from B0 */ | |
588 | spin_lock_irqsave(&priv->lock, flags); | |
589 | control = priv->line_control; | |
87265b45 | 590 | if (C_BAUD(tty) == B0) |
1da177e4 | 591 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
2d8f4447 | 592 | else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) |
1da177e4 LT |
593 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); |
594 | if (control != priv->line_control) { | |
595 | control = priv->line_control; | |
596 | spin_unlock_irqrestore(&priv->lock, flags); | |
f45d0a5a | 597 | pl2303_set_control_lines(port, control); |
1da177e4 LT |
598 | } else { |
599 | spin_unlock_irqrestore(&priv->lock, flags); | |
600 | } | |
372db8a7 | 601 | |
87265b45 | 602 | if (C_CRTSCTS(tty)) { |
23c6acb9 | 603 | if (spriv->quirks & PL2303_QUIRK_LEGACY) |
362eb026 | 604 | pl2303_vendor_write(serial, 0x0, 0x41); |
7f966ac7 JH |
605 | else |
606 | pl2303_vendor_write(serial, 0x0, 0x61); | |
715f9527 | 607 | } else { |
362eb026 | 608 | pl2303_vendor_write(serial, 0x0, 0x0); |
1da177e4 | 609 | } |
572d3138 TG |
610 | |
611 | kfree(buf); | |
612 | } | |
613 | ||
335f8514 AC |
614 | static void pl2303_dtr_rts(struct usb_serial_port *port, int on) |
615 | { | |
616 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
617 | unsigned long flags; | |
618 | u8 control; | |
619 | ||
620 | spin_lock_irqsave(&priv->lock, flags); | |
335f8514 AC |
621 | if (on) |
622 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
623 | else | |
624 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
625 | control = priv->line_control; | |
626 | spin_unlock_irqrestore(&priv->lock, flags); | |
ccfe8188 | 627 | |
f45d0a5a | 628 | pl2303_set_control_lines(port, control); |
335f8514 AC |
629 | } |
630 | ||
631 | static void pl2303_close(struct usb_serial_port *port) | |
572d3138 | 632 | { |
8b0127b2 | 633 | usb_serial_generic_close(port); |
572d3138 | 634 | usb_kill_urb(port->interrupt_in_urb); |
52772a7f | 635 | pl2303_set_break(port, false); |
1da177e4 LT |
636 | } |
637 | ||
a509a7e4 | 638 | static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 639 | { |
1da177e4 | 640 | struct usb_serial *serial = port->serial; |
8bf769eb | 641 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); |
1da177e4 LT |
642 | int result; |
643 | ||
23c6acb9 | 644 | if (spriv->quirks & PL2303_QUIRK_LEGACY) { |
1694899f D |
645 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
646 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
3e152505 | 647 | } else { |
1da177e4 | 648 | /* reset upstream data pipes */ |
362eb026 JH |
649 | pl2303_vendor_write(serial, 8, 0); |
650 | pl2303_vendor_write(serial, 9, 0); | |
1da177e4 LT |
651 | } |
652 | ||
1da177e4 | 653 | /* Setup termios */ |
95da310e | 654 | if (tty) |
2d8f4447 | 655 | pl2303_set_termios(tty, port, NULL); |
1da177e4 | 656 | |
372db8a7 | 657 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
1da177e4 | 658 | if (result) { |
ccfe8188 JH |
659 | dev_err(&port->dev, "failed to submit interrupt urb: %d\n", |
660 | result); | |
db6e9186 | 661 | return result; |
1da177e4 | 662 | } |
d4691c3f | 663 | |
f5230a53 | 664 | result = usb_serial_generic_open(tty, port); |
d4691c3f JH |
665 | if (result) { |
666 | usb_kill_urb(port->interrupt_in_urb); | |
667 | return result; | |
668 | } | |
669 | ||
1da177e4 LT |
670 | return 0; |
671 | } | |
672 | ||
20b9d177 | 673 | static int pl2303_tiocmset(struct tty_struct *tty, |
372db8a7 | 674 | unsigned int set, unsigned int clear) |
1da177e4 | 675 | { |
95da310e | 676 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
677 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
678 | unsigned long flags; | |
679 | u8 control; | |
6f1efd6c | 680 | int ret; |
6fdd8e8e | 681 | |
372db8a7 | 682 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
683 | if (set & TIOCM_RTS) |
684 | priv->line_control |= CONTROL_RTS; | |
685 | if (set & TIOCM_DTR) | |
686 | priv->line_control |= CONTROL_DTR; | |
687 | if (clear & TIOCM_RTS) | |
688 | priv->line_control &= ~CONTROL_RTS; | |
689 | if (clear & TIOCM_DTR) | |
690 | priv->line_control &= ~CONTROL_DTR; | |
691 | control = priv->line_control; | |
372db8a7 | 692 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 693 | |
5ddbb26b JH |
694 | ret = pl2303_set_control_lines(port, control); |
695 | if (ret) | |
696 | return usb_translate_errors(ret); | |
6f1efd6c | 697 | |
5ddbb26b | 698 | return 0; |
1da177e4 LT |
699 | } |
700 | ||
60b33c13 | 701 | static int pl2303_tiocmget(struct tty_struct *tty) |
1da177e4 | 702 | { |
95da310e | 703 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
704 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
705 | unsigned long flags; | |
706 | unsigned int mcr; | |
707 | unsigned int status; | |
708 | unsigned int result; | |
709 | ||
372db8a7 | 710 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
711 | mcr = priv->line_control; |
712 | status = priv->line_status; | |
372db8a7 | 713 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
714 | |
715 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) | |
716 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) | |
717 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
718 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
719 | | ((status & UART_RING) ? TIOCM_RI : 0) | |
720 | | ((status & UART_DCD) ? TIOCM_CD : 0); | |
721 | ||
d8789b2b | 722 | dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); |
1da177e4 LT |
723 | |
724 | return result; | |
725 | } | |
726 | ||
335f8514 AC |
727 | static int pl2303_carrier_raised(struct usb_serial_port *port) |
728 | { | |
729 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
ccfe8188 | 730 | |
335f8514 AC |
731 | if (priv->line_status & UART_DCD) |
732 | return 1; | |
ccfe8188 | 733 | |
335f8514 AC |
734 | return 0; |
735 | } | |
736 | ||
00a0d0d6 | 737 | static int pl2303_ioctl(struct tty_struct *tty, |
372db8a7 | 738 | unsigned int cmd, unsigned long arg) |
1da177e4 | 739 | { |
67b9946d | 740 | struct serial_struct ser; |
95da310e | 741 | struct usb_serial_port *port = tty->driver_data; |
d8789b2b | 742 | |
1da177e4 | 743 | switch (cmd) { |
67b9946d JT |
744 | case TIOCGSERIAL: |
745 | memset(&ser, 0, sizeof ser); | |
746 | ser.type = PORT_16654; | |
e5b1e206 | 747 | ser.line = port->minor; |
1143832e | 748 | ser.port = port->port_number; |
67b9946d JT |
749 | ser.baud_base = 460800; |
750 | ||
751 | if (copy_to_user((void __user *)arg, &ser, sizeof ser)) | |
752 | return -EFAULT; | |
753 | ||
754 | return 0; | |
3a0f43e9 | 755 | default: |
3a0f43e9 | 756 | break; |
1da177e4 | 757 | } |
ccfe8188 | 758 | |
1da177e4 LT |
759 | return -ENOIOCTLCMD; |
760 | } | |
761 | ||
52772a7f | 762 | static void pl2303_set_break(struct usb_serial_port *port, bool enable) |
1da177e4 LT |
763 | { |
764 | struct usb_serial *serial = port->serial; | |
765 | u16 state; | |
766 | int result; | |
767 | ||
52772a7f | 768 | if (enable) |
1da177e4 | 769 | state = BREAK_ON; |
52772a7f JH |
770 | else |
771 | state = BREAK_OFF; | |
ccfe8188 | 772 | |
d8789b2b | 773 | dev_dbg(&port->dev, "%s - turning break %s\n", __func__, |
3a0f43e9 | 774 | state == BREAK_OFF ? "off" : "on"); |
1da177e4 | 775 | |
372db8a7 TG |
776 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
777 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, | |
778 | 0, NULL, 0, 100); | |
1da177e4 | 779 | if (result) |
d8789b2b | 780 | dev_err(&port->dev, "error sending break = %d\n", result); |
1da177e4 LT |
781 | } |
782 | ||
52772a7f JH |
783 | static void pl2303_break_ctl(struct tty_struct *tty, int state) |
784 | { | |
785 | struct usb_serial_port *port = tty->driver_data; | |
786 | ||
787 | pl2303_set_break(port, state); | |
788 | } | |
789 | ||
97bb13ec FL |
790 | static void pl2303_update_line_status(struct usb_serial_port *port, |
791 | unsigned char *data, | |
792 | unsigned int actual_length) | |
793 | { | |
228e4105 JH |
794 | struct usb_serial *serial = port->serial; |
795 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
97bb13ec | 796 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
d14fc1a7 | 797 | struct tty_struct *tty; |
97bb13ec | 798 | unsigned long flags; |
228e4105 | 799 | unsigned int status_idx = UART_STATE_INDEX; |
6020c3be JH |
800 | u8 status; |
801 | u8 delta; | |
97bb13ec | 802 | |
228e4105 JH |
803 | if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) |
804 | status_idx = 0; | |
97bb13ec | 805 | |
228e4105 | 806 | if (actual_length < status_idx + 1) |
a009b75a | 807 | return; |
97bb13ec | 808 | |
6020c3be JH |
809 | status = data[status_idx]; |
810 | ||
3a0f43e9 | 811 | /* Save off the uart status for others to look at */ |
97bb13ec | 812 | spin_lock_irqsave(&priv->lock, flags); |
6020c3be JH |
813 | delta = priv->line_status ^ status; |
814 | priv->line_status = status; | |
97bb13ec | 815 | spin_unlock_irqrestore(&priv->lock, flags); |
ccfe8188 | 816 | |
6020c3be | 817 | if (status & UART_BREAK_ERROR) |
430eb0d2 | 818 | usb_serial_handle_break(port); |
ccfe8188 | 819 | |
dbfd2866 | 820 | if (delta & UART_STATE_MSR_MASK) { |
a4bcb294 JH |
821 | if (delta & UART_CTS) |
822 | port->icount.cts++; | |
823 | if (delta & UART_DSR) | |
824 | port->icount.dsr++; | |
825 | if (delta & UART_RING) | |
826 | port->icount.rng++; | |
dbfd2866 | 827 | if (delta & UART_DCD) { |
a4bcb294 | 828 | port->icount.dcd++; |
dbfd2866 JH |
829 | tty = tty_port_tty_get(&port->port); |
830 | if (tty) { | |
831 | usb_serial_handle_dcd_change(port, tty, | |
6020c3be | 832 | status & UART_DCD); |
dbfd2866 JH |
833 | tty_kref_put(tty); |
834 | } | |
6020c3be | 835 | } |
dbfd2866 JH |
836 | |
837 | wake_up_interruptible(&port->port.delta_msr_wait); | |
6020c3be | 838 | } |
97bb13ec | 839 | } |
1da177e4 | 840 | |
7d12e780 | 841 | static void pl2303_read_int_callback(struct urb *urb) |
1da177e4 | 842 | { |
cdc97792 | 843 | struct usb_serial_port *port = urb->context; |
1da177e4 | 844 | unsigned char *data = urb->transfer_buffer; |
97bb13ec | 845 | unsigned int actual_length = urb->actual_length; |
461d696a GKH |
846 | int status = urb->status; |
847 | int retval; | |
1da177e4 | 848 | |
461d696a | 849 | switch (status) { |
1da177e4 LT |
850 | case 0: |
851 | /* success */ | |
852 | break; | |
853 | case -ECONNRESET: | |
854 | case -ENOENT: | |
855 | case -ESHUTDOWN: | |
856 | /* this urb is terminated, clean up */ | |
d8789b2b GKH |
857 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
858 | __func__, status); | |
1da177e4 LT |
859 | return; |
860 | default: | |
d8789b2b GKH |
861 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
862 | __func__, status); | |
1da177e4 LT |
863 | goto exit; |
864 | } | |
865 | ||
59d33f2f | 866 | usb_serial_debug_data(&port->dev, __func__, |
372db8a7 TG |
867 | urb->actual_length, urb->transfer_buffer); |
868 | ||
97bb13ec | 869 | pl2303_update_line_status(port, data, actual_length); |
1da177e4 | 870 | |
1da177e4 | 871 | exit: |
461d696a | 872 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
ccfe8188 | 873 | if (retval) { |
d8789b2b | 874 | dev_err(&port->dev, |
372db8a7 | 875 | "%s - usb_submit_urb failed with result %d\n", |
441b62c1 | 876 | __func__, retval); |
ccfe8188 | 877 | } |
1da177e4 LT |
878 | } |
879 | ||
f08e07ac | 880 | static void pl2303_process_read_urb(struct urb *urb) |
d4fc4a7b | 881 | { |
f08e07ac JH |
882 | struct usb_serial_port *port = urb->context; |
883 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
d4fc4a7b | 884 | unsigned char *data = urb->transfer_buffer; |
d4fc4a7b | 885 | char tty_flag = TTY_NORMAL; |
f08e07ac JH |
886 | unsigned long flags; |
887 | u8 line_status; | |
888 | int i; | |
889 | ||
890 | /* update line status */ | |
891 | spin_lock_irqsave(&priv->lock, flags); | |
892 | line_status = priv->line_status; | |
893 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; | |
894 | spin_unlock_irqrestore(&priv->lock, flags); | |
f08e07ac JH |
895 | |
896 | if (!urb->actual_length) | |
897 | return; | |
898 | ||
ccfe8188 JH |
899 | /* |
900 | * Break takes precedence over parity, which takes precedence over | |
901 | * framing errors. | |
902 | */ | |
d4fc4a7b AC |
903 | if (line_status & UART_BREAK_ERROR) |
904 | tty_flag = TTY_BREAK; | |
905 | else if (line_status & UART_PARITY_ERROR) | |
906 | tty_flag = TTY_PARITY; | |
907 | else if (line_status & UART_FRAME_ERROR) | |
908 | tty_flag = TTY_FRAME; | |
d4fc4a7b | 909 | |
3ba19fe3 JH |
910 | if (tty_flag != TTY_NORMAL) |
911 | dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, | |
912 | tty_flag); | |
d4fc4a7b AC |
913 | /* overrun is special, not associated with a char */ |
914 | if (line_status & UART_OVERRUN_ERROR) | |
92a19f9c | 915 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
9388e2e7 | 916 | |
d45cc8df | 917 | if (port->port.console && port->sysrq) { |
d4fc4a7b | 918 | for (i = 0; i < urb->actual_length; ++i) |
6ee9f4b4 | 919 | if (!usb_serial_handle_sysrq_char(port, data[i])) |
92a19f9c JS |
920 | tty_insert_flip_char(&port->port, data[i], |
921 | tty_flag); | |
d45cc8df | 922 | } else { |
2f693357 | 923 | tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, |
d45cc8df | 924 | urb->actual_length); |
9388e2e7 | 925 | } |
1da177e4 | 926 | |
2e124b4a | 927 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
928 | } |
929 | ||
572d3138 TG |
930 | static struct usb_serial_driver pl2303_device = { |
931 | .driver = { | |
932 | .owner = THIS_MODULE, | |
933 | .name = "pl2303", | |
934 | }, | |
935 | .id_table = id_table, | |
572d3138 | 936 | .num_ports = 1, |
7919c2fd | 937 | .bulk_in_size = 256, |
3efeaff6 | 938 | .bulk_out_size = 256, |
572d3138 TG |
939 | .open = pl2303_open, |
940 | .close = pl2303_close, | |
ccfe8188 | 941 | .dtr_rts = pl2303_dtr_rts, |
335f8514 | 942 | .carrier_raised = pl2303_carrier_raised, |
572d3138 TG |
943 | .ioctl = pl2303_ioctl, |
944 | .break_ctl = pl2303_break_ctl, | |
945 | .set_termios = pl2303_set_termios, | |
946 | .tiocmget = pl2303_tiocmget, | |
947 | .tiocmset = pl2303_tiocmset, | |
a4bcb294 | 948 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
f08e07ac | 949 | .process_read_urb = pl2303_process_read_urb, |
572d3138 | 950 | .read_int_callback = pl2303_read_int_callback, |
228e4105 | 951 | .probe = pl2303_probe, |
572d3138 | 952 | .attach = pl2303_startup, |
f9c99bb8 | 953 | .release = pl2303_release, |
8bf769eb JH |
954 | .port_probe = pl2303_port_probe, |
955 | .port_remove = pl2303_port_remove, | |
572d3138 | 956 | }; |
1da177e4 | 957 | |
f667ddad AS |
958 | static struct usb_serial_driver * const serial_drivers[] = { |
959 | &pl2303_device, NULL | |
960 | }; | |
961 | ||
68e24113 | 962 | module_usb_serial_driver(serial_drivers, id_table); |
1da177e4 | 963 | |
ccfe8188 | 964 | MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); |
1da177e4 | 965 | MODULE_LICENSE("GPL"); |