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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) |
9d717271 | 36 | #define PL2303_QUIRK_ENDPOINT_HACK BIT(2) |
228e4105 | 37 | |
7d40d7e8 | 38 | static const struct usb_device_id id_table[] = { |
9d717271 JH |
39 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID), |
40 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
1da177e4 | 41 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, |
3d861494 | 42 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, |
1da177e4 LT |
43 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, |
44 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, | |
b483b6aa | 45 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, |
4be2fa18 | 46 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, |
727df356 | 47 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, |
18344a1c | 48 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, |
96a3e79e | 49 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) }, |
91fcb1ce | 50 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ZTEK) }, |
1da177e4 | 51 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
8a28dea3 | 52 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, |
9d717271 JH |
53 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID), |
54 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
d07830db | 55 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID2) }, |
1da177e4 LT |
56 | { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, |
57 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, | |
58 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, | |
59 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, | |
58381719 | 60 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, |
1da177e4 LT |
61 | { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
62 | { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, | |
63 | { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, | |
64 | { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, | |
65 | { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, | |
66 | { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, | |
67 | { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, | |
228e4105 JH |
68 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1), |
69 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
70 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65), | |
71 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
72 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75), | |
73 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
9d717271 JH |
74 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81), |
75 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
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) }, |
9d717271 JH |
85 | { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID), |
86 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
2d94b981 | 87 | { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, |
9e3285db | 88 | { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, |
cc311ee7 | 89 | { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, |
7c992001 | 90 | { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, |
af4b8514 | 91 | { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, |
b16c02fb AS |
92 | { USB_DEVICE(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) }, |
93 | { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) }, | |
94 | { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) }, | |
8540d666 | 95 | { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, |
f36ecd5d | 96 | { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, |
49276560 | 97 | { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, |
35904e6b | 98 | { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, |
9a61d726 | 99 | { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, |
598f0b70 | 100 | { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, |
1da177e4 LT |
101 | { } /* Terminating entry */ |
102 | }; | |
103 | ||
372db8a7 | 104 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 105 | |
1da177e4 LT |
106 | #define SET_LINE_REQUEST_TYPE 0x21 |
107 | #define SET_LINE_REQUEST 0x20 | |
108 | ||
109 | #define SET_CONTROL_REQUEST_TYPE 0x21 | |
110 | #define SET_CONTROL_REQUEST 0x22 | |
111 | #define CONTROL_DTR 0x01 | |
112 | #define CONTROL_RTS 0x02 | |
113 | ||
114 | #define BREAK_REQUEST_TYPE 0x21 | |
3a0f43e9 | 115 | #define BREAK_REQUEST 0x23 |
1da177e4 LT |
116 | #define BREAK_ON 0xffff |
117 | #define BREAK_OFF 0x0000 | |
118 | ||
119 | #define GET_LINE_REQUEST_TYPE 0xa1 | |
120 | #define GET_LINE_REQUEST 0x21 | |
121 | ||
122 | #define VENDOR_WRITE_REQUEST_TYPE 0x40 | |
123 | #define VENDOR_WRITE_REQUEST 0x01 | |
124 | ||
125 | #define VENDOR_READ_REQUEST_TYPE 0xc0 | |
126 | #define VENDOR_READ_REQUEST 0x01 | |
127 | ||
228e4105 | 128 | #define UART_STATE_INDEX 8 |
dbfd2866 | 129 | #define UART_STATE_MSR_MASK 0x8b |
1da177e4 LT |
130 | #define UART_STATE_TRANSIENT_MASK 0x74 |
131 | #define UART_DCD 0x01 | |
132 | #define UART_DSR 0x02 | |
133 | #define UART_BREAK_ERROR 0x04 | |
134 | #define UART_RING 0x08 | |
135 | #define UART_FRAME_ERROR 0x10 | |
136 | #define UART_PARITY_ERROR 0x20 | |
137 | #define UART_OVERRUN_ERROR 0x40 | |
138 | #define UART_CTS 0x80 | |
139 | ||
52772a7f | 140 | static void pl2303_set_break(struct usb_serial_port *port, bool enable); |
1da177e4 LT |
141 | |
142 | enum pl2303_type { | |
7f966ac7 JH |
143 | TYPE_01, /* Type 0 and 1 (difference unknown) */ |
144 | TYPE_HX, /* HX version of the pl2303 chip */ | |
359defda JH |
145 | TYPE_COUNT |
146 | }; | |
147 | ||
148 | struct pl2303_type_data { | |
149 | speed_t max_baud_rate; | |
150 | unsigned long quirks; | |
1da177e4 LT |
151 | }; |
152 | ||
8bf769eb | 153 | struct pl2303_serial_private { |
b6934681 | 154 | const struct pl2303_type_data *type; |
228e4105 | 155 | unsigned long quirks; |
8bf769eb JH |
156 | }; |
157 | ||
1da177e4 LT |
158 | struct pl2303_private { |
159 | spinlock_t lock; | |
1da177e4 LT |
160 | u8 line_control; |
161 | u8 line_status; | |
623c8263 JH |
162 | |
163 | u8 line_settings[7]; | |
1da177e4 LT |
164 | }; |
165 | ||
b6934681 | 166 | static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { |
359defda JH |
167 | [TYPE_01] = { |
168 | .max_baud_rate = 1228800, | |
169 | .quirks = PL2303_QUIRK_LEGACY, | |
170 | }, | |
399aa9a7 LH |
171 | [TYPE_HX] = { |
172 | .max_baud_rate = 12000000, | |
173 | }, | |
359defda JH |
174 | }; |
175 | ||
362eb026 JH |
176 | static int pl2303_vendor_read(struct usb_serial *serial, u16 value, |
177 | unsigned char buf[1]) | |
eb44da0b | 178 | { |
362eb026 | 179 | struct device *dev = &serial->interface->dev; |
ccfe8188 JH |
180 | int res; |
181 | ||
182 | res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
eb44da0b | 183 | VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, |
362eb026 JH |
184 | value, 0, buf, 1, 100); |
185 | if (res != 1) { | |
186 | dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, | |
187 | value, res); | |
188 | if (res >= 0) | |
189 | res = -EIO; | |
190 | ||
191 | return res; | |
192 | } | |
ccfe8188 | 193 | |
362eb026 | 194 | dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); |
ccfe8188 | 195 | |
362eb026 | 196 | return 0; |
eb44da0b SS |
197 | } |
198 | ||
362eb026 | 199 | static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) |
eb44da0b | 200 | { |
362eb026 | 201 | struct device *dev = &serial->interface->dev; |
ccfe8188 JH |
202 | int res; |
203 | ||
362eb026 JH |
204 | dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); |
205 | ||
ccfe8188 | 206 | res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
eb44da0b SS |
207 | VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, |
208 | value, index, NULL, 0, 100); | |
362eb026 JH |
209 | if (res) { |
210 | dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, | |
211 | value, res); | |
212 | return res; | |
213 | } | |
ccfe8188 | 214 | |
362eb026 | 215 | return 0; |
eb44da0b SS |
216 | } |
217 | ||
228e4105 JH |
218 | static int pl2303_probe(struct usb_serial *serial, |
219 | const struct usb_device_id *id) | |
220 | { | |
221 | usb_set_serial_data(serial, (void *)id->driver_info); | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
9d717271 JH |
226 | /* |
227 | * Use interrupt endpoint from first interface if available. | |
228 | * | |
229 | * This is needed due to the looney way its endpoints are set up. | |
230 | */ | |
231 | static int pl2303_endpoint_hack(struct usb_serial *serial, | |
9fda620a JH |
232 | struct usb_serial_endpoints *epds) |
233 | { | |
234 | struct usb_interface *interface = serial->interface; | |
235 | struct usb_device *dev = serial->dev; | |
236 | struct device *ddev = &interface->dev; | |
237 | struct usb_host_interface *iface_desc; | |
238 | struct usb_endpoint_descriptor *endpoint; | |
239 | unsigned int i; | |
240 | ||
9d717271 JH |
241 | if (interface == dev->actconfig->interface[0]) |
242 | return 0; | |
243 | ||
244 | /* check out the endpoints of the other interface */ | |
245 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
246 | ||
247 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
248 | endpoint = &iface_desc->endpoint[i].desc; | |
249 | ||
250 | if (!usb_endpoint_is_int_in(endpoint)) | |
251 | continue; | |
252 | ||
253 | dev_dbg(ddev, "found interrupt in on separate interface\n"); | |
254 | if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) | |
255 | epds->interrupt_in[epds->num_interrupt_in++] = endpoint; | |
256 | } | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | static int pl2303_calc_num_ports(struct usb_serial *serial, | |
262 | struct usb_serial_endpoints *epds) | |
263 | { | |
264 | unsigned long quirks = (unsigned long)usb_get_serial_data(serial); | |
265 | struct device *dev = &serial->interface->dev; | |
266 | int ret; | |
267 | ||
268 | if (quirks & PL2303_QUIRK_ENDPOINT_HACK) { | |
269 | ret = pl2303_endpoint_hack(serial, epds); | |
270 | if (ret) | |
271 | return ret; | |
9fda620a | 272 | } |
9fda620a JH |
273 | |
274 | if (epds->num_interrupt_in < 1) { | |
9d717271 | 275 | dev_err(dev, "required interrupt-in endpoint missing\n"); |
9fda620a JH |
276 | return -ENODEV; |
277 | } | |
278 | ||
279 | return 1; | |
280 | } | |
281 | ||
372db8a7 | 282 | static int pl2303_startup(struct usb_serial *serial) |
1da177e4 | 283 | { |
8bf769eb | 284 | struct pl2303_serial_private *spriv; |
7f966ac7 | 285 | enum pl2303_type type = TYPE_01; |
3e152505 | 286 | unsigned char *buf; |
8bf769eb JH |
287 | |
288 | spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); | |
289 | if (!spriv) | |
290 | return -ENOMEM; | |
1da177e4 | 291 | |
362eb026 | 292 | buf = kmalloc(1, GFP_KERNEL); |
8bf769eb JH |
293 | if (!buf) { |
294 | kfree(spriv); | |
3e152505 | 295 | return -ENOMEM; |
8bf769eb | 296 | } |
3e152505 | 297 | |
b52e1113 | 298 | if (serial->dev->descriptor.bDeviceClass == 0x02) |
7f966ac7 | 299 | type = TYPE_01; /* type 0 */ |
b52e1113 | 300 | else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) |
7f966ac7 | 301 | type = TYPE_HX; |
281393ad | 302 | else if (serial->dev->descriptor.bDeviceClass == 0x00) |
7f966ac7 | 303 | type = TYPE_01; /* type 1 */ |
281393ad | 304 | else if (serial->dev->descriptor.bDeviceClass == 0xFF) |
7f966ac7 | 305 | type = TYPE_01; /* type 1 */ |
b52e1113 | 306 | dev_dbg(&serial->interface->dev, "device type: %d\n", type); |
1da177e4 | 307 | |
359defda | 308 | spriv->type = &pl2303_type_data[type]; |
228e4105 | 309 | spriv->quirks = (unsigned long)usb_get_serial_data(serial); |
359defda | 310 | spriv->quirks |= spriv->type->quirks; |
228e4105 | 311 | |
8bf769eb | 312 | usb_set_serial_data(serial, spriv); |
3e152505 | 313 | |
362eb026 JH |
314 | pl2303_vendor_read(serial, 0x8484, buf); |
315 | pl2303_vendor_write(serial, 0x0404, 0); | |
316 | pl2303_vendor_read(serial, 0x8484, buf); | |
317 | pl2303_vendor_read(serial, 0x8383, buf); | |
318 | pl2303_vendor_read(serial, 0x8484, buf); | |
319 | pl2303_vendor_write(serial, 0x0404, 1); | |
320 | pl2303_vendor_read(serial, 0x8484, buf); | |
321 | pl2303_vendor_read(serial, 0x8383, buf); | |
322 | pl2303_vendor_write(serial, 0, 1); | |
323 | pl2303_vendor_write(serial, 1, 0); | |
23c6acb9 | 324 | if (spriv->quirks & PL2303_QUIRK_LEGACY) |
362eb026 | 325 | pl2303_vendor_write(serial, 2, 0x24); |
7f966ac7 JH |
326 | else |
327 | pl2303_vendor_write(serial, 2, 0x44); | |
3e152505 SS |
328 | |
329 | kfree(buf); | |
ccfe8188 | 330 | |
1da177e4 | 331 | return 0; |
8bf769eb | 332 | } |
1da177e4 | 333 | |
8bf769eb JH |
334 | static void pl2303_release(struct usb_serial *serial) |
335 | { | |
ccfe8188 | 336 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); |
8bf769eb | 337 | |
8bf769eb JH |
338 | kfree(spriv); |
339 | } | |
340 | ||
341 | static int pl2303_port_probe(struct usb_serial_port *port) | |
342 | { | |
343 | struct pl2303_private *priv; | |
344 | ||
345 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
346 | if (!priv) | |
347 | return -ENOMEM; | |
348 | ||
349 | spin_lock_init(&priv->lock); | |
8bf769eb JH |
350 | |
351 | usb_set_serial_port_data(port, priv); | |
352 | ||
d7be6221 JH |
353 | port->port.drain_delay = 256; |
354 | ||
8bf769eb JH |
355 | return 0; |
356 | } | |
357 | ||
358 | static int pl2303_port_remove(struct usb_serial_port *port) | |
359 | { | |
ccfe8188 | 360 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
8bf769eb | 361 | |
8bf769eb JH |
362 | kfree(priv); |
363 | ||
364 | return 0; | |
1da177e4 LT |
365 | } |
366 | ||
f45d0a5a | 367 | static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) |
1da177e4 | 368 | { |
f45d0a5a | 369 | struct usb_device *dev = port->serial->dev; |
1da177e4 | 370 | int retval; |
3a0f43e9 | 371 | |
a6ec8245 JH |
372 | dev_dbg(&port->dev, "%s - %02x\n", __func__, value); |
373 | ||
372db8a7 TG |
374 | retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
375 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, | |
376 | value, 0, NULL, 0, 100); | |
a6ec8245 JH |
377 | if (retval) |
378 | dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); | |
ccfe8188 | 379 | |
1da177e4 LT |
380 | return retval; |
381 | } | |
382 | ||
59afe10e | 383 | /* |
5d85045f JH |
384 | * Returns the nearest supported baud rate that can be set directly without |
385 | * using divisors. | |
59afe10e JH |
386 | */ |
387 | static speed_t pl2303_get_supported_baud_rate(speed_t baud) | |
1da177e4 | 388 | { |
59afe10e JH |
389 | static const speed_t baud_sup[] = { |
390 | 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, | |
391 | 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, | |
5d85045f | 392 | 614400, 921600, 1228800, 2457600, 3000000, 6000000 |
59afe10e | 393 | }; |
1da177e4 | 394 | |
59afe10e | 395 | unsigned i; |
692ed4dd | 396 | |
7e12a6fc GKH |
397 | for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { |
398 | if (baud_sup[i] > baud) | |
399 | break; | |
400 | } | |
692ed4dd | 401 | |
7e12a6fc GKH |
402 | if (i == ARRAY_SIZE(baud_sup)) |
403 | baud = baud_sup[i - 1]; | |
404 | else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) | |
405 | baud = baud_sup[i - 1]; | |
406 | else | |
407 | baud = baud_sup[i]; | |
692ed4dd | 408 | |
59afe10e JH |
409 | return baud; |
410 | } | |
411 | ||
20b4c787 JH |
412 | /* |
413 | * NOTE: If unsupported baud rates are set directly, the PL2303 seems to | |
414 | * use 9600 baud. | |
415 | */ | |
416 | static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], | |
417 | speed_t baud) | |
418 | { | |
419 | put_unaligned_le32(baud, buf); | |
420 | ||
421 | return baud; | |
422 | } | |
423 | ||
c82c6d45 JH |
424 | static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], |
425 | speed_t baud) | |
426 | { | |
49bda212 | 427 | unsigned int baseline, mantissa, exponent; |
c82c6d45 JH |
428 | |
429 | /* | |
430 | * Apparently the formula is: | |
49bda212 MP |
431 | * baudrate = 12M * 32 / (mantissa * 4^exponent) |
432 | * where | |
433 | * mantissa = buf[8:0] | |
434 | * exponent = buf[11:9] | |
c82c6d45 | 435 | */ |
49bda212 MP |
436 | baseline = 12000000 * 32; |
437 | mantissa = baseline / baud; | |
438 | if (mantissa == 0) | |
439 | mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ | |
440 | exponent = 0; | |
441 | while (mantissa >= 512) { | |
442 | if (exponent < 7) { | |
443 | mantissa >>= 2; /* divide by 4 */ | |
444 | exponent++; | |
445 | } else { | |
446 | /* Exponent is maxed. Trim mantissa and leave. */ | |
447 | mantissa = 511; | |
448 | break; | |
449 | } | |
450 | } | |
451 | ||
c82c6d45 JH |
452 | buf[3] = 0x80; |
453 | buf[2] = 0; | |
49bda212 MP |
454 | buf[1] = exponent << 1 | mantissa >> 8; |
455 | buf[0] = mantissa & 0xff; | |
456 | ||
457 | /* Calculate and return the exact baud rate. */ | |
458 | baud = (baseline / mantissa) >> (exponent << 1); | |
c82c6d45 JH |
459 | |
460 | return baud; | |
461 | } | |
462 | ||
59afe10e JH |
463 | static void pl2303_encode_baud_rate(struct tty_struct *tty, |
464 | struct usb_serial_port *port, | |
465 | u8 buf[4]) | |
466 | { | |
467 | struct usb_serial *serial = port->serial; | |
468 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
5d85045f | 469 | speed_t baud_sup; |
59afe10e JH |
470 | speed_t baud; |
471 | ||
472 | baud = tty_get_baud_rate(tty); | |
473 | dev_dbg(&port->dev, "baud requested = %u\n", baud); | |
474 | if (!baud) | |
475 | return; | |
871996ed JH |
476 | |
477 | if (spriv->type->max_baud_rate) | |
478 | baud = min_t(speed_t, baud, spriv->type->max_baud_rate); | |
5d85045f | 479 | /* |
399aa9a7 | 480 | * Use direct method for supported baud rates, otherwise use divisors. |
5d85045f JH |
481 | */ |
482 | baud_sup = pl2303_get_supported_baud_rate(baud); | |
20b4c787 | 483 | |
399aa9a7 LH |
484 | if (baud == baud_sup) |
485 | baud = pl2303_encode_baud_rate_direct(buf, baud); | |
5d85045f | 486 | else |
399aa9a7 | 487 | baud = pl2303_encode_baud_rate_divisor(buf, baud); |
692ed4dd | 488 | |
15e7cead | 489 | /* Save resulting baud rate */ |
b2d6d98f | 490 | tty_encode_baud_rate(tty, baud, baud); |
f84ee3b2 | 491 | dev_dbg(&port->dev, "baud set = %u\n", baud); |
15e7cead JH |
492 | } |
493 | ||
383d19c5 JH |
494 | static int pl2303_get_line_request(struct usb_serial_port *port, |
495 | unsigned char buf[7]) | |
496 | { | |
497 | struct usb_device *udev = port->serial->dev; | |
498 | int ret; | |
499 | ||
500 | ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), | |
501 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
502 | 0, 0, buf, 7, 100); | |
503 | if (ret != 7) { | |
504 | dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); | |
505 | ||
b5fda434 | 506 | if (ret >= 0) |
383d19c5 JH |
507 | ret = -EIO; |
508 | ||
509 | return ret; | |
510 | } | |
511 | ||
512 | dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | static int pl2303_set_line_request(struct usb_serial_port *port, | |
518 | unsigned char buf[7]) | |
519 | { | |
520 | struct usb_device *udev = port->serial->dev; | |
521 | int ret; | |
522 | ||
523 | ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
524 | SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, | |
525 | 0, 0, buf, 7, 100); | |
b5fda434 | 526 | if (ret < 0) { |
383d19c5 | 527 | dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); |
383d19c5 JH |
528 | return ret; |
529 | } | |
530 | ||
531 | dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
15e7cead JH |
536 | static void pl2303_set_termios(struct tty_struct *tty, |
537 | struct usb_serial_port *port, struct ktermios *old_termios) | |
538 | { | |
539 | struct usb_serial *serial = port->serial; | |
540 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
541 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
542 | unsigned long flags; | |
15e7cead | 543 | unsigned char *buf; |
383d19c5 | 544 | int ret; |
15e7cead JH |
545 | u8 control; |
546 | ||
15e7cead JH |
547 | if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) |
548 | return; | |
549 | ||
15e7cead JH |
550 | buf = kzalloc(7, GFP_KERNEL); |
551 | if (!buf) { | |
15e7cead JH |
552 | /* Report back no change occurred */ |
553 | if (old_termios) | |
554 | tty->termios = *old_termios; | |
555 | return; | |
556 | } | |
557 | ||
383d19c5 | 558 | pl2303_get_line_request(port, buf); |
15e7cead | 559 | |
a3132499 CL |
560 | switch (C_CSIZE(tty)) { |
561 | case CS5: | |
562 | buf[6] = 5; | |
563 | break; | |
564 | case CS6: | |
565 | buf[6] = 6; | |
566 | break; | |
567 | case CS7: | |
568 | buf[6] = 7; | |
569 | break; | |
570 | default: | |
571 | case CS8: | |
572 | buf[6] = 8; | |
15e7cead | 573 | } |
a3132499 | 574 | dev_dbg(&port->dev, "data bits = %d\n", buf[6]); |
15e7cead | 575 | |
692ed4dd | 576 | /* For reference buf[0]:buf[3] baud rate value */ |
79816824 | 577 | pl2303_encode_baud_rate(tty, port, &buf[0]); |
15e7cead | 578 | |
1da177e4 LT |
579 | /* For reference buf[4]=0 is 1 stop bits */ |
580 | /* For reference buf[4]=1 is 1.5 stop bits */ | |
581 | /* For reference buf[4]=2 is 2 stop bits */ | |
87265b45 JH |
582 | if (C_CSTOPB(tty)) { |
583 | /* | |
584 | * NOTE: Comply with "real" UARTs / RS232: | |
29cf1b72 FS |
585 | * use 1.5 instead of 2 stop bits with 5 data bits |
586 | */ | |
87265b45 | 587 | if (C_CSIZE(tty) == CS5) { |
29cf1b72 | 588 | buf[4] = 1; |
d8789b2b | 589 | dev_dbg(&port->dev, "stop bits = 1.5\n"); |
29cf1b72 FS |
590 | } else { |
591 | buf[4] = 2; | |
d8789b2b | 592 | dev_dbg(&port->dev, "stop bits = 2\n"); |
29cf1b72 | 593 | } |
1da177e4 LT |
594 | } else { |
595 | buf[4] = 0; | |
d8789b2b | 596 | dev_dbg(&port->dev, "stop bits = 1\n"); |
1da177e4 LT |
597 | } |
598 | ||
87265b45 | 599 | if (C_PARENB(tty)) { |
1da177e4 LT |
600 | /* For reference buf[5]=0 is none parity */ |
601 | /* For reference buf[5]=1 is odd parity */ | |
602 | /* For reference buf[5]=2 is even parity */ | |
603 | /* For reference buf[5]=3 is mark parity */ | |
604 | /* For reference buf[5]=4 is space parity */ | |
87265b45 | 605 | if (C_PARODD(tty)) { |
619c4354 | 606 | if (C_CMSPAR(tty)) { |
6dd81b45 | 607 | buf[5] = 3; |
d8789b2b | 608 | dev_dbg(&port->dev, "parity = mark\n"); |
6dd81b45 FS |
609 | } else { |
610 | buf[5] = 1; | |
d8789b2b | 611 | dev_dbg(&port->dev, "parity = odd\n"); |
6dd81b45 | 612 | } |
1da177e4 | 613 | } else { |
619c4354 | 614 | if (C_CMSPAR(tty)) { |
6dd81b45 | 615 | buf[5] = 4; |
d8789b2b | 616 | dev_dbg(&port->dev, "parity = space\n"); |
6dd81b45 FS |
617 | } else { |
618 | buf[5] = 2; | |
d8789b2b | 619 | dev_dbg(&port->dev, "parity = even\n"); |
6dd81b45 | 620 | } |
1da177e4 LT |
621 | } |
622 | } else { | |
623 | buf[5] = 0; | |
d8789b2b | 624 | dev_dbg(&port->dev, "parity = none\n"); |
1da177e4 LT |
625 | } |
626 | ||
623c8263 JH |
627 | /* |
628 | * Some PL2303 are known to lose bytes if you change serial settings | |
629 | * even to the same values as before. Thus we actually need to filter | |
630 | * in this specific case. | |
631 | * | |
632 | * Note that the tty_termios_hw_change check above is not sufficient | |
633 | * as a previously requested baud rate may differ from the one | |
634 | * actually used (and stored in old_termios). | |
635 | * | |
636 | * NOTE: No additional locking needed for line_settings as it is | |
637 | * only used in set_termios, which is serialised against itself. | |
638 | */ | |
639 | if (!old_termios || memcmp(buf, priv->line_settings, 7)) { | |
383d19c5 JH |
640 | ret = pl2303_set_line_request(port, buf); |
641 | if (!ret) | |
623c8263 JH |
642 | memcpy(priv->line_settings, buf, 7); |
643 | } | |
1da177e4 LT |
644 | |
645 | /* change control lines if we are switching to or from B0 */ | |
646 | spin_lock_irqsave(&priv->lock, flags); | |
647 | control = priv->line_control; | |
87265b45 | 648 | if (C_BAUD(tty) == B0) |
1da177e4 | 649 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
2d8f4447 | 650 | else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) |
1da177e4 LT |
651 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); |
652 | if (control != priv->line_control) { | |
653 | control = priv->line_control; | |
654 | spin_unlock_irqrestore(&priv->lock, flags); | |
f45d0a5a | 655 | pl2303_set_control_lines(port, control); |
1da177e4 LT |
656 | } else { |
657 | spin_unlock_irqrestore(&priv->lock, flags); | |
658 | } | |
372db8a7 | 659 | |
87265b45 | 660 | if (C_CRTSCTS(tty)) { |
23c6acb9 | 661 | if (spriv->quirks & PL2303_QUIRK_LEGACY) |
362eb026 | 662 | pl2303_vendor_write(serial, 0x0, 0x41); |
7f966ac7 JH |
663 | else |
664 | pl2303_vendor_write(serial, 0x0, 0x61); | |
715f9527 | 665 | } else { |
362eb026 | 666 | pl2303_vendor_write(serial, 0x0, 0x0); |
1da177e4 | 667 | } |
572d3138 TG |
668 | |
669 | kfree(buf); | |
670 | } | |
671 | ||
335f8514 AC |
672 | static void pl2303_dtr_rts(struct usb_serial_port *port, int on) |
673 | { | |
674 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
675 | unsigned long flags; | |
676 | u8 control; | |
677 | ||
678 | spin_lock_irqsave(&priv->lock, flags); | |
335f8514 AC |
679 | if (on) |
680 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
681 | else | |
682 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
683 | control = priv->line_control; | |
684 | spin_unlock_irqrestore(&priv->lock, flags); | |
ccfe8188 | 685 | |
f45d0a5a | 686 | pl2303_set_control_lines(port, control); |
335f8514 AC |
687 | } |
688 | ||
689 | static void pl2303_close(struct usb_serial_port *port) | |
572d3138 | 690 | { |
8b0127b2 | 691 | usb_serial_generic_close(port); |
572d3138 | 692 | usb_kill_urb(port->interrupt_in_urb); |
52772a7f | 693 | pl2303_set_break(port, false); |
1da177e4 LT |
694 | } |
695 | ||
a509a7e4 | 696 | static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 697 | { |
1da177e4 | 698 | struct usb_serial *serial = port->serial; |
8bf769eb | 699 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); |
1da177e4 LT |
700 | int result; |
701 | ||
23c6acb9 | 702 | if (spriv->quirks & PL2303_QUIRK_LEGACY) { |
1694899f D |
703 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
704 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
3e152505 | 705 | } else { |
1da177e4 | 706 | /* reset upstream data pipes */ |
362eb026 JH |
707 | pl2303_vendor_write(serial, 8, 0); |
708 | pl2303_vendor_write(serial, 9, 0); | |
1da177e4 LT |
709 | } |
710 | ||
1da177e4 | 711 | /* Setup termios */ |
95da310e | 712 | if (tty) |
2d8f4447 | 713 | pl2303_set_termios(tty, port, NULL); |
1da177e4 | 714 | |
372db8a7 | 715 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
1da177e4 | 716 | if (result) { |
ccfe8188 JH |
717 | dev_err(&port->dev, "failed to submit interrupt urb: %d\n", |
718 | result); | |
db6e9186 | 719 | return result; |
1da177e4 | 720 | } |
d4691c3f | 721 | |
f5230a53 | 722 | result = usb_serial_generic_open(tty, port); |
d4691c3f JH |
723 | if (result) { |
724 | usb_kill_urb(port->interrupt_in_urb); | |
725 | return result; | |
726 | } | |
727 | ||
1da177e4 LT |
728 | return 0; |
729 | } | |
730 | ||
20b9d177 | 731 | static int pl2303_tiocmset(struct tty_struct *tty, |
372db8a7 | 732 | unsigned int set, unsigned int clear) |
1da177e4 | 733 | { |
95da310e | 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 | u8 control; | |
6f1efd6c | 738 | int ret; |
6fdd8e8e | 739 | |
372db8a7 | 740 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
741 | if (set & TIOCM_RTS) |
742 | priv->line_control |= CONTROL_RTS; | |
743 | if (set & TIOCM_DTR) | |
744 | priv->line_control |= CONTROL_DTR; | |
745 | if (clear & TIOCM_RTS) | |
746 | priv->line_control &= ~CONTROL_RTS; | |
747 | if (clear & TIOCM_DTR) | |
748 | priv->line_control &= ~CONTROL_DTR; | |
749 | control = priv->line_control; | |
372db8a7 | 750 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 751 | |
5ddbb26b JH |
752 | ret = pl2303_set_control_lines(port, control); |
753 | if (ret) | |
754 | return usb_translate_errors(ret); | |
6f1efd6c | 755 | |
5ddbb26b | 756 | return 0; |
1da177e4 LT |
757 | } |
758 | ||
60b33c13 | 759 | static int pl2303_tiocmget(struct tty_struct *tty) |
1da177e4 | 760 | { |
95da310e | 761 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
762 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
763 | unsigned long flags; | |
764 | unsigned int mcr; | |
765 | unsigned int status; | |
766 | unsigned int result; | |
767 | ||
372db8a7 | 768 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
769 | mcr = priv->line_control; |
770 | status = priv->line_status; | |
372db8a7 | 771 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
772 | |
773 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) | |
774 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) | |
775 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
776 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
777 | | ((status & UART_RING) ? TIOCM_RI : 0) | |
778 | | ((status & UART_DCD) ? TIOCM_CD : 0); | |
779 | ||
d8789b2b | 780 | dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); |
1da177e4 LT |
781 | |
782 | return result; | |
783 | } | |
784 | ||
335f8514 AC |
785 | static int pl2303_carrier_raised(struct usb_serial_port *port) |
786 | { | |
787 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
ccfe8188 | 788 | |
335f8514 AC |
789 | if (priv->line_status & UART_DCD) |
790 | return 1; | |
ccfe8188 | 791 | |
335f8514 AC |
792 | return 0; |
793 | } | |
794 | ||
00a0d0d6 | 795 | static int pl2303_ioctl(struct tty_struct *tty, |
372db8a7 | 796 | unsigned int cmd, unsigned long arg) |
1da177e4 | 797 | { |
67b9946d | 798 | struct serial_struct ser; |
95da310e | 799 | struct usb_serial_port *port = tty->driver_data; |
d8789b2b | 800 | |
1da177e4 | 801 | switch (cmd) { |
67b9946d JT |
802 | case TIOCGSERIAL: |
803 | memset(&ser, 0, sizeof ser); | |
804 | ser.type = PORT_16654; | |
e5b1e206 | 805 | ser.line = port->minor; |
1143832e | 806 | ser.port = port->port_number; |
67b9946d JT |
807 | ser.baud_base = 460800; |
808 | ||
809 | if (copy_to_user((void __user *)arg, &ser, sizeof ser)) | |
810 | return -EFAULT; | |
811 | ||
812 | return 0; | |
3a0f43e9 | 813 | default: |
3a0f43e9 | 814 | break; |
1da177e4 | 815 | } |
ccfe8188 | 816 | |
1da177e4 LT |
817 | return -ENOIOCTLCMD; |
818 | } | |
819 | ||
52772a7f | 820 | static void pl2303_set_break(struct usb_serial_port *port, bool enable) |
1da177e4 LT |
821 | { |
822 | struct usb_serial *serial = port->serial; | |
823 | u16 state; | |
824 | int result; | |
825 | ||
52772a7f | 826 | if (enable) |
1da177e4 | 827 | state = BREAK_ON; |
52772a7f JH |
828 | else |
829 | state = BREAK_OFF; | |
ccfe8188 | 830 | |
d8789b2b | 831 | dev_dbg(&port->dev, "%s - turning break %s\n", __func__, |
3a0f43e9 | 832 | state == BREAK_OFF ? "off" : "on"); |
1da177e4 | 833 | |
372db8a7 TG |
834 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
835 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, | |
836 | 0, NULL, 0, 100); | |
1da177e4 | 837 | if (result) |
d8789b2b | 838 | dev_err(&port->dev, "error sending break = %d\n", result); |
1da177e4 LT |
839 | } |
840 | ||
52772a7f JH |
841 | static void pl2303_break_ctl(struct tty_struct *tty, int state) |
842 | { | |
843 | struct usb_serial_port *port = tty->driver_data; | |
844 | ||
845 | pl2303_set_break(port, state); | |
846 | } | |
847 | ||
97bb13ec FL |
848 | static void pl2303_update_line_status(struct usb_serial_port *port, |
849 | unsigned char *data, | |
850 | unsigned int actual_length) | |
851 | { | |
228e4105 JH |
852 | struct usb_serial *serial = port->serial; |
853 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
97bb13ec | 854 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
d14fc1a7 | 855 | struct tty_struct *tty; |
97bb13ec | 856 | unsigned long flags; |
228e4105 | 857 | unsigned int status_idx = UART_STATE_INDEX; |
6020c3be JH |
858 | u8 status; |
859 | u8 delta; | |
97bb13ec | 860 | |
228e4105 JH |
861 | if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) |
862 | status_idx = 0; | |
97bb13ec | 863 | |
228e4105 | 864 | if (actual_length < status_idx + 1) |
a009b75a | 865 | return; |
97bb13ec | 866 | |
6020c3be JH |
867 | status = data[status_idx]; |
868 | ||
3a0f43e9 | 869 | /* Save off the uart status for others to look at */ |
97bb13ec | 870 | spin_lock_irqsave(&priv->lock, flags); |
6020c3be JH |
871 | delta = priv->line_status ^ status; |
872 | priv->line_status = status; | |
97bb13ec | 873 | spin_unlock_irqrestore(&priv->lock, flags); |
ccfe8188 | 874 | |
6020c3be | 875 | if (status & UART_BREAK_ERROR) |
430eb0d2 | 876 | usb_serial_handle_break(port); |
ccfe8188 | 877 | |
dbfd2866 | 878 | if (delta & UART_STATE_MSR_MASK) { |
a4bcb294 JH |
879 | if (delta & UART_CTS) |
880 | port->icount.cts++; | |
881 | if (delta & UART_DSR) | |
882 | port->icount.dsr++; | |
883 | if (delta & UART_RING) | |
884 | port->icount.rng++; | |
dbfd2866 | 885 | if (delta & UART_DCD) { |
a4bcb294 | 886 | port->icount.dcd++; |
dbfd2866 JH |
887 | tty = tty_port_tty_get(&port->port); |
888 | if (tty) { | |
889 | usb_serial_handle_dcd_change(port, tty, | |
6020c3be | 890 | status & UART_DCD); |
dbfd2866 JH |
891 | tty_kref_put(tty); |
892 | } | |
6020c3be | 893 | } |
dbfd2866 JH |
894 | |
895 | wake_up_interruptible(&port->port.delta_msr_wait); | |
6020c3be | 896 | } |
97bb13ec | 897 | } |
1da177e4 | 898 | |
7d12e780 | 899 | static void pl2303_read_int_callback(struct urb *urb) |
1da177e4 | 900 | { |
cdc97792 | 901 | struct usb_serial_port *port = urb->context; |
1da177e4 | 902 | unsigned char *data = urb->transfer_buffer; |
97bb13ec | 903 | unsigned int actual_length = urb->actual_length; |
461d696a GKH |
904 | int status = urb->status; |
905 | int retval; | |
1da177e4 | 906 | |
461d696a | 907 | switch (status) { |
1da177e4 LT |
908 | case 0: |
909 | /* success */ | |
910 | break; | |
911 | case -ECONNRESET: | |
912 | case -ENOENT: | |
913 | case -ESHUTDOWN: | |
914 | /* this urb is terminated, clean up */ | |
d8789b2b GKH |
915 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
916 | __func__, status); | |
1da177e4 LT |
917 | return; |
918 | default: | |
d8789b2b GKH |
919 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
920 | __func__, status); | |
1da177e4 LT |
921 | goto exit; |
922 | } | |
923 | ||
59d33f2f | 924 | usb_serial_debug_data(&port->dev, __func__, |
372db8a7 TG |
925 | urb->actual_length, urb->transfer_buffer); |
926 | ||
97bb13ec | 927 | pl2303_update_line_status(port, data, actual_length); |
1da177e4 | 928 | |
1da177e4 | 929 | exit: |
461d696a | 930 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
ccfe8188 | 931 | if (retval) { |
d8789b2b | 932 | dev_err(&port->dev, |
372db8a7 | 933 | "%s - usb_submit_urb failed with result %d\n", |
441b62c1 | 934 | __func__, retval); |
ccfe8188 | 935 | } |
1da177e4 LT |
936 | } |
937 | ||
f08e07ac | 938 | static void pl2303_process_read_urb(struct urb *urb) |
d4fc4a7b | 939 | { |
f08e07ac JH |
940 | struct usb_serial_port *port = urb->context; |
941 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
d4fc4a7b | 942 | unsigned char *data = urb->transfer_buffer; |
d4fc4a7b | 943 | char tty_flag = TTY_NORMAL; |
f08e07ac JH |
944 | unsigned long flags; |
945 | u8 line_status; | |
946 | int i; | |
947 | ||
948 | /* update line status */ | |
949 | spin_lock_irqsave(&priv->lock, flags); | |
950 | line_status = priv->line_status; | |
951 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; | |
952 | spin_unlock_irqrestore(&priv->lock, flags); | |
f08e07ac JH |
953 | |
954 | if (!urb->actual_length) | |
955 | return; | |
956 | ||
ccfe8188 JH |
957 | /* |
958 | * Break takes precedence over parity, which takes precedence over | |
959 | * framing errors. | |
960 | */ | |
d4fc4a7b AC |
961 | if (line_status & UART_BREAK_ERROR) |
962 | tty_flag = TTY_BREAK; | |
963 | else if (line_status & UART_PARITY_ERROR) | |
964 | tty_flag = TTY_PARITY; | |
965 | else if (line_status & UART_FRAME_ERROR) | |
966 | tty_flag = TTY_FRAME; | |
d4fc4a7b | 967 | |
3ba19fe3 JH |
968 | if (tty_flag != TTY_NORMAL) |
969 | dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, | |
970 | tty_flag); | |
d4fc4a7b AC |
971 | /* overrun is special, not associated with a char */ |
972 | if (line_status & UART_OVERRUN_ERROR) | |
92a19f9c | 973 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
9388e2e7 | 974 | |
d45cc8df | 975 | if (port->port.console && port->sysrq) { |
d4fc4a7b | 976 | for (i = 0; i < urb->actual_length; ++i) |
6ee9f4b4 | 977 | if (!usb_serial_handle_sysrq_char(port, data[i])) |
92a19f9c JS |
978 | tty_insert_flip_char(&port->port, data[i], |
979 | tty_flag); | |
d45cc8df | 980 | } else { |
2f693357 | 981 | tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, |
d45cc8df | 982 | urb->actual_length); |
9388e2e7 | 983 | } |
1da177e4 | 984 | |
2e124b4a | 985 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
986 | } |
987 | ||
572d3138 TG |
988 | static struct usb_serial_driver pl2303_device = { |
989 | .driver = { | |
990 | .owner = THIS_MODULE, | |
991 | .name = "pl2303", | |
992 | }, | |
993 | .id_table = id_table, | |
590298b2 JH |
994 | .num_bulk_in = 1, |
995 | .num_bulk_out = 1, | |
9fda620a | 996 | .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ |
7919c2fd | 997 | .bulk_in_size = 256, |
3efeaff6 | 998 | .bulk_out_size = 256, |
572d3138 TG |
999 | .open = pl2303_open, |
1000 | .close = pl2303_close, | |
ccfe8188 | 1001 | .dtr_rts = pl2303_dtr_rts, |
335f8514 | 1002 | .carrier_raised = pl2303_carrier_raised, |
572d3138 TG |
1003 | .ioctl = pl2303_ioctl, |
1004 | .break_ctl = pl2303_break_ctl, | |
1005 | .set_termios = pl2303_set_termios, | |
1006 | .tiocmget = pl2303_tiocmget, | |
1007 | .tiocmset = pl2303_tiocmset, | |
a4bcb294 | 1008 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
f08e07ac | 1009 | .process_read_urb = pl2303_process_read_urb, |
572d3138 | 1010 | .read_int_callback = pl2303_read_int_callback, |
228e4105 | 1011 | .probe = pl2303_probe, |
9fda620a | 1012 | .calc_num_ports = pl2303_calc_num_ports, |
572d3138 | 1013 | .attach = pl2303_startup, |
f9c99bb8 | 1014 | .release = pl2303_release, |
8bf769eb JH |
1015 | .port_probe = pl2303_port_probe, |
1016 | .port_remove = pl2303_port_remove, | |
572d3138 | 1017 | }; |
1da177e4 | 1018 | |
f667ddad AS |
1019 | static struct usb_serial_driver * const serial_drivers[] = { |
1020 | &pl2303_device, NULL | |
1021 | }; | |
1022 | ||
68e24113 | 1023 | module_usb_serial_driver(serial_drivers, id_table); |
1da177e4 | 1024 | |
ccfe8188 | 1025 | MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); |
1da177e4 | 1026 | MODULE_LICENSE("GPL"); |