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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * Prolific PL2303 USB to serial adaptor driver | |
4 | * | |
4d0dce3e | 5 | * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
6 | * Copyright (C) 2003 IBM Corp. |
7 | * | |
8 | * Original driver for 2.2.x by anonymous | |
9 | * | |
3a0f43e9 AC |
10 | * See Documentation/usb/usb-serial.txt for more information on using this |
11 | * driver | |
1da177e4 LT |
12 | */ |
13 | ||
1da177e4 LT |
14 | #include <linux/kernel.h> |
15 | #include <linux/errno.h> | |
1da177e4 LT |
16 | #include <linux/slab.h> |
17 | #include <linux/tty.h> | |
18 | #include <linux/tty_driver.h> | |
19 | #include <linux/tty_flip.h> | |
20 | #include <linux/serial.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/moduleparam.h> | |
23 | #include <linux/spinlock.h> | |
3a0f43e9 | 24 | #include <linux/uaccess.h> |
1da177e4 | 25 | #include <linux/usb.h> |
a969888c | 26 | #include <linux/usb/serial.h> |
b2d6d98f | 27 | #include <asm/unaligned.h> |
1da177e4 LT |
28 | #include "pl2303.h" |
29 | ||
228e4105 JH |
30 | |
31 | #define PL2303_QUIRK_UART_STATE_IDX0 BIT(0) | |
23c6acb9 | 32 | #define PL2303_QUIRK_LEGACY BIT(1) |
9d717271 | 33 | #define PL2303_QUIRK_ENDPOINT_HACK BIT(2) |
228e4105 | 34 | |
7d40d7e8 | 35 | static const struct usb_device_id id_table[] = { |
9d717271 JH |
36 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID), |
37 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
1da177e4 | 38 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, |
3d861494 | 39 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, |
1da177e4 LT |
40 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, |
41 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, | |
b483b6aa | 42 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, |
4be2fa18 | 43 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, |
727df356 | 44 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, |
18344a1c | 45 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, |
96a3e79e | 46 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) }, |
91fcb1ce | 47 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ZTEK) }, |
1da177e4 | 48 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
8a28dea3 | 49 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, |
9d717271 JH |
50 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID), |
51 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
3b6bcd3d GKH |
52 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_UC485), |
53 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
d07830db | 54 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID2) }, |
1da177e4 LT |
55 | { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, |
56 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, | |
57 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, | |
58 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, | |
58381719 | 59 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, |
1da177e4 LT |
60 | { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
61 | { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, | |
62 | { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, | |
63 | { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, | |
64 | { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, | |
65 | { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, | |
66 | { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, | |
228e4105 JH |
67 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1), |
68 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
69 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65), | |
70 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
71 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75), | |
72 | .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, | |
9d717271 JH |
73 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81), |
74 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
912299f6 | 75 | { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ |
acbb36f1 | 76 | { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, |
c6c27721 CL |
77 | { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, |
78 | { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, | |
6cceb05f | 79 | { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, |
c6c27721 | 80 | { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, |
491b04ce | 81 | { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, |
3b928474 | 82 | { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, |
b7aa94b6 | 83 | { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, |
9d717271 JH |
84 | { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID), |
85 | .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, | |
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) }, |
b16c02fb AS |
91 | { USB_DEVICE(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) }, |
92 | { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) }, | |
93 | { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) }, | |
8540d666 | 94 | { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, |
f36ecd5d | 95 | { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, |
49276560 | 96 | { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, |
35904e6b | 97 | { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, |
9a61d726 | 98 | { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, |
598f0b70 | 99 | { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, |
1da177e4 LT |
100 | { } /* Terminating entry */ |
101 | }; | |
102 | ||
372db8a7 | 103 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 104 | |
1da177e4 LT |
105 | #define SET_LINE_REQUEST_TYPE 0x21 |
106 | #define SET_LINE_REQUEST 0x20 | |
107 | ||
108 | #define SET_CONTROL_REQUEST_TYPE 0x21 | |
109 | #define SET_CONTROL_REQUEST 0x22 | |
110 | #define CONTROL_DTR 0x01 | |
111 | #define CONTROL_RTS 0x02 | |
112 | ||
113 | #define BREAK_REQUEST_TYPE 0x21 | |
3a0f43e9 | 114 | #define BREAK_REQUEST 0x23 |
1da177e4 LT |
115 | #define BREAK_ON 0xffff |
116 | #define BREAK_OFF 0x0000 | |
117 | ||
118 | #define GET_LINE_REQUEST_TYPE 0xa1 | |
119 | #define GET_LINE_REQUEST 0x21 | |
120 | ||
121 | #define VENDOR_WRITE_REQUEST_TYPE 0x40 | |
122 | #define VENDOR_WRITE_REQUEST 0x01 | |
123 | ||
124 | #define VENDOR_READ_REQUEST_TYPE 0xc0 | |
125 | #define VENDOR_READ_REQUEST 0x01 | |
126 | ||
228e4105 | 127 | #define UART_STATE_INDEX 8 |
dbfd2866 | 128 | #define UART_STATE_MSR_MASK 0x8b |
1da177e4 LT |
129 | #define UART_STATE_TRANSIENT_MASK 0x74 |
130 | #define UART_DCD 0x01 | |
131 | #define UART_DSR 0x02 | |
132 | #define UART_BREAK_ERROR 0x04 | |
133 | #define UART_RING 0x08 | |
134 | #define UART_FRAME_ERROR 0x10 | |
135 | #define UART_PARITY_ERROR 0x20 | |
136 | #define UART_OVERRUN_ERROR 0x40 | |
137 | #define UART_CTS 0x80 | |
138 | ||
52772a7f | 139 | static void pl2303_set_break(struct usb_serial_port *port, bool enable); |
1da177e4 LT |
140 | |
141 | enum pl2303_type { | |
7f966ac7 JH |
142 | TYPE_01, /* Type 0 and 1 (difference unknown) */ |
143 | TYPE_HX, /* HX version of the pl2303 chip */ | |
359defda JH |
144 | TYPE_COUNT |
145 | }; | |
146 | ||
147 | struct pl2303_type_data { | |
148 | speed_t max_baud_rate; | |
149 | unsigned long quirks; | |
1da177e4 LT |
150 | }; |
151 | ||
8bf769eb | 152 | struct pl2303_serial_private { |
b6934681 | 153 | const struct pl2303_type_data *type; |
228e4105 | 154 | unsigned long quirks; |
8bf769eb JH |
155 | }; |
156 | ||
1da177e4 LT |
157 | struct pl2303_private { |
158 | spinlock_t lock; | |
1da177e4 LT |
159 | u8 line_control; |
160 | u8 line_status; | |
623c8263 JH |
161 | |
162 | u8 line_settings[7]; | |
1da177e4 LT |
163 | }; |
164 | ||
b6934681 | 165 | static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { |
359defda JH |
166 | [TYPE_01] = { |
167 | .max_baud_rate = 1228800, | |
168 | .quirks = PL2303_QUIRK_LEGACY, | |
169 | }, | |
399aa9a7 LH |
170 | [TYPE_HX] = { |
171 | .max_baud_rate = 12000000, | |
172 | }, | |
359defda JH |
173 | }; |
174 | ||
362eb026 JH |
175 | static int pl2303_vendor_read(struct usb_serial *serial, u16 value, |
176 | unsigned char buf[1]) | |
eb44da0b | 177 | { |
362eb026 | 178 | struct device *dev = &serial->interface->dev; |
ccfe8188 JH |
179 | int res; |
180 | ||
181 | res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
eb44da0b | 182 | VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, |
362eb026 JH |
183 | value, 0, buf, 1, 100); |
184 | if (res != 1) { | |
185 | dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, | |
186 | value, res); | |
187 | if (res >= 0) | |
188 | res = -EIO; | |
189 | ||
190 | return res; | |
191 | } | |
ccfe8188 | 192 | |
362eb026 | 193 | dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); |
ccfe8188 | 194 | |
362eb026 | 195 | return 0; |
eb44da0b SS |
196 | } |
197 | ||
362eb026 | 198 | static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) |
eb44da0b | 199 | { |
362eb026 | 200 | struct device *dev = &serial->interface->dev; |
ccfe8188 JH |
201 | int res; |
202 | ||
362eb026 JH |
203 | dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); |
204 | ||
ccfe8188 | 205 | res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
eb44da0b SS |
206 | VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, |
207 | value, index, NULL, 0, 100); | |
362eb026 JH |
208 | if (res) { |
209 | dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, | |
210 | value, res); | |
211 | return res; | |
212 | } | |
ccfe8188 | 213 | |
362eb026 | 214 | return 0; |
eb44da0b SS |
215 | } |
216 | ||
228e4105 JH |
217 | static int pl2303_probe(struct usb_serial *serial, |
218 | const struct usb_device_id *id) | |
219 | { | |
220 | usb_set_serial_data(serial, (void *)id->driver_info); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
9d717271 JH |
225 | /* |
226 | * Use interrupt endpoint from first interface if available. | |
227 | * | |
228 | * This is needed due to the looney way its endpoints are set up. | |
229 | */ | |
230 | static int pl2303_endpoint_hack(struct usb_serial *serial, | |
9fda620a JH |
231 | struct usb_serial_endpoints *epds) |
232 | { | |
233 | struct usb_interface *interface = serial->interface; | |
234 | struct usb_device *dev = serial->dev; | |
235 | struct device *ddev = &interface->dev; | |
236 | struct usb_host_interface *iface_desc; | |
237 | struct usb_endpoint_descriptor *endpoint; | |
238 | unsigned int i; | |
239 | ||
9d717271 JH |
240 | if (interface == dev->actconfig->interface[0]) |
241 | return 0; | |
242 | ||
243 | /* check out the endpoints of the other interface */ | |
244 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
245 | ||
246 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
247 | endpoint = &iface_desc->endpoint[i].desc; | |
248 | ||
249 | if (!usb_endpoint_is_int_in(endpoint)) | |
250 | continue; | |
251 | ||
252 | dev_dbg(ddev, "found interrupt in on separate interface\n"); | |
253 | if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) | |
254 | epds->interrupt_in[epds->num_interrupt_in++] = endpoint; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | static int pl2303_calc_num_ports(struct usb_serial *serial, | |
261 | struct usb_serial_endpoints *epds) | |
262 | { | |
263 | unsigned long quirks = (unsigned long)usb_get_serial_data(serial); | |
264 | struct device *dev = &serial->interface->dev; | |
265 | int ret; | |
266 | ||
267 | if (quirks & PL2303_QUIRK_ENDPOINT_HACK) { | |
268 | ret = pl2303_endpoint_hack(serial, epds); | |
269 | if (ret) | |
270 | return ret; | |
9fda620a | 271 | } |
9fda620a JH |
272 | |
273 | if (epds->num_interrupt_in < 1) { | |
9d717271 | 274 | dev_err(dev, "required interrupt-in endpoint missing\n"); |
9fda620a JH |
275 | return -ENODEV; |
276 | } | |
277 | ||
278 | return 1; | |
279 | } | |
280 | ||
372db8a7 | 281 | static int pl2303_startup(struct usb_serial *serial) |
1da177e4 | 282 | { |
8bf769eb | 283 | struct pl2303_serial_private *spriv; |
7f966ac7 | 284 | enum pl2303_type type = TYPE_01; |
3e152505 | 285 | unsigned char *buf; |
8bf769eb JH |
286 | |
287 | spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); | |
288 | if (!spriv) | |
289 | return -ENOMEM; | |
1da177e4 | 290 | |
362eb026 | 291 | buf = kmalloc(1, GFP_KERNEL); |
8bf769eb JH |
292 | if (!buf) { |
293 | kfree(spriv); | |
3e152505 | 294 | return -ENOMEM; |
8bf769eb | 295 | } |
3e152505 | 296 | |
b52e1113 | 297 | if (serial->dev->descriptor.bDeviceClass == 0x02) |
7f966ac7 | 298 | type = TYPE_01; /* type 0 */ |
b52e1113 | 299 | else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) |
7f966ac7 | 300 | type = TYPE_HX; |
281393ad | 301 | else if (serial->dev->descriptor.bDeviceClass == 0x00) |
7f966ac7 | 302 | type = TYPE_01; /* type 1 */ |
281393ad | 303 | else if (serial->dev->descriptor.bDeviceClass == 0xFF) |
7f966ac7 | 304 | type = TYPE_01; /* type 1 */ |
b52e1113 | 305 | dev_dbg(&serial->interface->dev, "device type: %d\n", type); |
1da177e4 | 306 | |
359defda | 307 | spriv->type = &pl2303_type_data[type]; |
228e4105 | 308 | spriv->quirks = (unsigned long)usb_get_serial_data(serial); |
359defda | 309 | spriv->quirks |= spriv->type->quirks; |
228e4105 | 310 | |
8bf769eb | 311 | usb_set_serial_data(serial, spriv); |
3e152505 | 312 | |
362eb026 JH |
313 | pl2303_vendor_read(serial, 0x8484, buf); |
314 | pl2303_vendor_write(serial, 0x0404, 0); | |
315 | pl2303_vendor_read(serial, 0x8484, buf); | |
316 | pl2303_vendor_read(serial, 0x8383, buf); | |
317 | pl2303_vendor_read(serial, 0x8484, buf); | |
318 | pl2303_vendor_write(serial, 0x0404, 1); | |
319 | pl2303_vendor_read(serial, 0x8484, buf); | |
320 | pl2303_vendor_read(serial, 0x8383, buf); | |
321 | pl2303_vendor_write(serial, 0, 1); | |
322 | pl2303_vendor_write(serial, 1, 0); | |
23c6acb9 | 323 | if (spriv->quirks & PL2303_QUIRK_LEGACY) |
362eb026 | 324 | pl2303_vendor_write(serial, 2, 0x24); |
7f966ac7 JH |
325 | else |
326 | pl2303_vendor_write(serial, 2, 0x44); | |
3e152505 SS |
327 | |
328 | kfree(buf); | |
ccfe8188 | 329 | |
1da177e4 | 330 | return 0; |
8bf769eb | 331 | } |
1da177e4 | 332 | |
8bf769eb JH |
333 | static void pl2303_release(struct usb_serial *serial) |
334 | { | |
ccfe8188 | 335 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); |
8bf769eb | 336 | |
8bf769eb JH |
337 | kfree(spriv); |
338 | } | |
339 | ||
340 | static int pl2303_port_probe(struct usb_serial_port *port) | |
341 | { | |
342 | struct pl2303_private *priv; | |
343 | ||
344 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
345 | if (!priv) | |
346 | return -ENOMEM; | |
347 | ||
348 | spin_lock_init(&priv->lock); | |
8bf769eb JH |
349 | |
350 | usb_set_serial_port_data(port, priv); | |
351 | ||
d7be6221 JH |
352 | port->port.drain_delay = 256; |
353 | ||
8bf769eb JH |
354 | return 0; |
355 | } | |
356 | ||
357 | static int pl2303_port_remove(struct usb_serial_port *port) | |
358 | { | |
ccfe8188 | 359 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
8bf769eb | 360 | |
8bf769eb JH |
361 | kfree(priv); |
362 | ||
363 | return 0; | |
1da177e4 LT |
364 | } |
365 | ||
f45d0a5a | 366 | static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) |
1da177e4 | 367 | { |
f45d0a5a | 368 | struct usb_device *dev = port->serial->dev; |
1da177e4 | 369 | int retval; |
3a0f43e9 | 370 | |
a6ec8245 JH |
371 | dev_dbg(&port->dev, "%s - %02x\n", __func__, value); |
372 | ||
372db8a7 TG |
373 | retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
374 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, | |
375 | value, 0, NULL, 0, 100); | |
a6ec8245 JH |
376 | if (retval) |
377 | dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); | |
ccfe8188 | 378 | |
1da177e4 LT |
379 | return retval; |
380 | } | |
381 | ||
59afe10e | 382 | /* |
5d85045f JH |
383 | * Returns the nearest supported baud rate that can be set directly without |
384 | * using divisors. | |
59afe10e JH |
385 | */ |
386 | static speed_t pl2303_get_supported_baud_rate(speed_t baud) | |
1da177e4 | 387 | { |
59afe10e JH |
388 | static const speed_t baud_sup[] = { |
389 | 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, | |
390 | 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, | |
5d85045f | 391 | 614400, 921600, 1228800, 2457600, 3000000, 6000000 |
59afe10e | 392 | }; |
1da177e4 | 393 | |
59afe10e | 394 | unsigned i; |
692ed4dd | 395 | |
7e12a6fc GKH |
396 | for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { |
397 | if (baud_sup[i] > baud) | |
398 | break; | |
399 | } | |
692ed4dd | 400 | |
7e12a6fc GKH |
401 | if (i == ARRAY_SIZE(baud_sup)) |
402 | baud = baud_sup[i - 1]; | |
403 | else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) | |
404 | baud = baud_sup[i - 1]; | |
405 | else | |
406 | baud = baud_sup[i]; | |
692ed4dd | 407 | |
59afe10e JH |
408 | return baud; |
409 | } | |
410 | ||
20b4c787 JH |
411 | /* |
412 | * NOTE: If unsupported baud rates are set directly, the PL2303 seems to | |
413 | * use 9600 baud. | |
414 | */ | |
415 | static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], | |
416 | speed_t baud) | |
417 | { | |
418 | put_unaligned_le32(baud, buf); | |
419 | ||
420 | return baud; | |
421 | } | |
422 | ||
c82c6d45 JH |
423 | static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], |
424 | speed_t baud) | |
425 | { | |
49bda212 | 426 | unsigned int baseline, mantissa, exponent; |
c82c6d45 JH |
427 | |
428 | /* | |
429 | * Apparently the formula is: | |
49bda212 MP |
430 | * baudrate = 12M * 32 / (mantissa * 4^exponent) |
431 | * where | |
432 | * mantissa = buf[8:0] | |
433 | * exponent = buf[11:9] | |
c82c6d45 | 434 | */ |
49bda212 MP |
435 | baseline = 12000000 * 32; |
436 | mantissa = baseline / baud; | |
437 | if (mantissa == 0) | |
438 | mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ | |
439 | exponent = 0; | |
440 | while (mantissa >= 512) { | |
441 | if (exponent < 7) { | |
442 | mantissa >>= 2; /* divide by 4 */ | |
443 | exponent++; | |
444 | } else { | |
445 | /* Exponent is maxed. Trim mantissa and leave. */ | |
446 | mantissa = 511; | |
447 | break; | |
448 | } | |
449 | } | |
450 | ||
c82c6d45 JH |
451 | buf[3] = 0x80; |
452 | buf[2] = 0; | |
49bda212 MP |
453 | buf[1] = exponent << 1 | mantissa >> 8; |
454 | buf[0] = mantissa & 0xff; | |
455 | ||
456 | /* Calculate and return the exact baud rate. */ | |
457 | baud = (baseline / mantissa) >> (exponent << 1); | |
c82c6d45 JH |
458 | |
459 | return baud; | |
460 | } | |
461 | ||
59afe10e JH |
462 | static void pl2303_encode_baud_rate(struct tty_struct *tty, |
463 | struct usb_serial_port *port, | |
464 | u8 buf[4]) | |
465 | { | |
466 | struct usb_serial *serial = port->serial; | |
467 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
5d85045f | 468 | speed_t baud_sup; |
59afe10e JH |
469 | speed_t baud; |
470 | ||
471 | baud = tty_get_baud_rate(tty); | |
472 | dev_dbg(&port->dev, "baud requested = %u\n", baud); | |
473 | if (!baud) | |
474 | return; | |
871996ed JH |
475 | |
476 | if (spriv->type->max_baud_rate) | |
477 | baud = min_t(speed_t, baud, spriv->type->max_baud_rate); | |
5d85045f | 478 | /* |
399aa9a7 | 479 | * Use direct method for supported baud rates, otherwise use divisors. |
5d85045f JH |
480 | */ |
481 | baud_sup = pl2303_get_supported_baud_rate(baud); | |
20b4c787 | 482 | |
399aa9a7 LH |
483 | if (baud == baud_sup) |
484 | baud = pl2303_encode_baud_rate_direct(buf, baud); | |
5d85045f | 485 | else |
399aa9a7 | 486 | baud = pl2303_encode_baud_rate_divisor(buf, baud); |
692ed4dd | 487 | |
15e7cead | 488 | /* Save resulting baud rate */ |
b2d6d98f | 489 | tty_encode_baud_rate(tty, baud, baud); |
f84ee3b2 | 490 | dev_dbg(&port->dev, "baud set = %u\n", baud); |
15e7cead JH |
491 | } |
492 | ||
383d19c5 JH |
493 | static int pl2303_get_line_request(struct usb_serial_port *port, |
494 | unsigned char buf[7]) | |
495 | { | |
496 | struct usb_device *udev = port->serial->dev; | |
497 | int ret; | |
498 | ||
499 | ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), | |
500 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, | |
501 | 0, 0, buf, 7, 100); | |
502 | if (ret != 7) { | |
503 | dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); | |
504 | ||
b5fda434 | 505 | if (ret >= 0) |
383d19c5 JH |
506 | ret = -EIO; |
507 | ||
508 | return ret; | |
509 | } | |
510 | ||
511 | dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); | |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
516 | static int pl2303_set_line_request(struct usb_serial_port *port, | |
517 | unsigned char buf[7]) | |
518 | { | |
519 | struct usb_device *udev = port->serial->dev; | |
520 | int ret; | |
521 | ||
522 | ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
523 | SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, | |
524 | 0, 0, buf, 7, 100); | |
b5fda434 | 525 | if (ret < 0) { |
383d19c5 | 526 | dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); |
383d19c5 JH |
527 | return ret; |
528 | } | |
529 | ||
530 | dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
15e7cead JH |
535 | static void pl2303_set_termios(struct tty_struct *tty, |
536 | struct usb_serial_port *port, struct ktermios *old_termios) | |
537 | { | |
538 | struct usb_serial *serial = port->serial; | |
539 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
540 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
541 | unsigned long flags; | |
15e7cead | 542 | unsigned char *buf; |
383d19c5 | 543 | int ret; |
15e7cead JH |
544 | u8 control; |
545 | ||
15e7cead JH |
546 | if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) |
547 | return; | |
548 | ||
15e7cead JH |
549 | buf = kzalloc(7, GFP_KERNEL); |
550 | if (!buf) { | |
15e7cead JH |
551 | /* Report back no change occurred */ |
552 | if (old_termios) | |
553 | tty->termios = *old_termios; | |
554 | return; | |
555 | } | |
556 | ||
383d19c5 | 557 | pl2303_get_line_request(port, buf); |
15e7cead | 558 | |
a3132499 CL |
559 | switch (C_CSIZE(tty)) { |
560 | case CS5: | |
561 | buf[6] = 5; | |
562 | break; | |
563 | case CS6: | |
564 | buf[6] = 6; | |
565 | break; | |
566 | case CS7: | |
567 | buf[6] = 7; | |
568 | break; | |
569 | default: | |
570 | case CS8: | |
571 | buf[6] = 8; | |
15e7cead | 572 | } |
a3132499 | 573 | dev_dbg(&port->dev, "data bits = %d\n", buf[6]); |
15e7cead | 574 | |
692ed4dd | 575 | /* For reference buf[0]:buf[3] baud rate value */ |
79816824 | 576 | pl2303_encode_baud_rate(tty, port, &buf[0]); |
15e7cead | 577 | |
1da177e4 LT |
578 | /* For reference buf[4]=0 is 1 stop bits */ |
579 | /* For reference buf[4]=1 is 1.5 stop bits */ | |
580 | /* For reference buf[4]=2 is 2 stop bits */ | |
87265b45 JH |
581 | if (C_CSTOPB(tty)) { |
582 | /* | |
583 | * NOTE: Comply with "real" UARTs / RS232: | |
29cf1b72 FS |
584 | * use 1.5 instead of 2 stop bits with 5 data bits |
585 | */ | |
87265b45 | 586 | if (C_CSIZE(tty) == CS5) { |
29cf1b72 | 587 | buf[4] = 1; |
d8789b2b | 588 | dev_dbg(&port->dev, "stop bits = 1.5\n"); |
29cf1b72 FS |
589 | } else { |
590 | buf[4] = 2; | |
d8789b2b | 591 | dev_dbg(&port->dev, "stop bits = 2\n"); |
29cf1b72 | 592 | } |
1da177e4 LT |
593 | } else { |
594 | buf[4] = 0; | |
d8789b2b | 595 | dev_dbg(&port->dev, "stop bits = 1\n"); |
1da177e4 LT |
596 | } |
597 | ||
87265b45 | 598 | if (C_PARENB(tty)) { |
1da177e4 LT |
599 | /* For reference buf[5]=0 is none parity */ |
600 | /* For reference buf[5]=1 is odd parity */ | |
601 | /* For reference buf[5]=2 is even parity */ | |
602 | /* For reference buf[5]=3 is mark parity */ | |
603 | /* For reference buf[5]=4 is space parity */ | |
87265b45 | 604 | if (C_PARODD(tty)) { |
619c4354 | 605 | if (C_CMSPAR(tty)) { |
6dd81b45 | 606 | buf[5] = 3; |
d8789b2b | 607 | dev_dbg(&port->dev, "parity = mark\n"); |
6dd81b45 FS |
608 | } else { |
609 | buf[5] = 1; | |
d8789b2b | 610 | dev_dbg(&port->dev, "parity = odd\n"); |
6dd81b45 | 611 | } |
1da177e4 | 612 | } else { |
619c4354 | 613 | if (C_CMSPAR(tty)) { |
6dd81b45 | 614 | buf[5] = 4; |
d8789b2b | 615 | dev_dbg(&port->dev, "parity = space\n"); |
6dd81b45 FS |
616 | } else { |
617 | buf[5] = 2; | |
d8789b2b | 618 | dev_dbg(&port->dev, "parity = even\n"); |
6dd81b45 | 619 | } |
1da177e4 LT |
620 | } |
621 | } else { | |
622 | buf[5] = 0; | |
d8789b2b | 623 | dev_dbg(&port->dev, "parity = none\n"); |
1da177e4 LT |
624 | } |
625 | ||
623c8263 JH |
626 | /* |
627 | * Some PL2303 are known to lose bytes if you change serial settings | |
628 | * even to the same values as before. Thus we actually need to filter | |
629 | * in this specific case. | |
630 | * | |
631 | * Note that the tty_termios_hw_change check above is not sufficient | |
632 | * as a previously requested baud rate may differ from the one | |
633 | * actually used (and stored in old_termios). | |
634 | * | |
635 | * NOTE: No additional locking needed for line_settings as it is | |
636 | * only used in set_termios, which is serialised against itself. | |
637 | */ | |
638 | if (!old_termios || memcmp(buf, priv->line_settings, 7)) { | |
383d19c5 JH |
639 | ret = pl2303_set_line_request(port, buf); |
640 | if (!ret) | |
623c8263 JH |
641 | memcpy(priv->line_settings, buf, 7); |
642 | } | |
1da177e4 LT |
643 | |
644 | /* change control lines if we are switching to or from B0 */ | |
645 | spin_lock_irqsave(&priv->lock, flags); | |
646 | control = priv->line_control; | |
87265b45 | 647 | if (C_BAUD(tty) == B0) |
1da177e4 | 648 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
2d8f4447 | 649 | else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) |
1da177e4 LT |
650 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); |
651 | if (control != priv->line_control) { | |
652 | control = priv->line_control; | |
653 | spin_unlock_irqrestore(&priv->lock, flags); | |
f45d0a5a | 654 | pl2303_set_control_lines(port, control); |
1da177e4 LT |
655 | } else { |
656 | spin_unlock_irqrestore(&priv->lock, flags); | |
657 | } | |
372db8a7 | 658 | |
87265b45 | 659 | if (C_CRTSCTS(tty)) { |
23c6acb9 | 660 | if (spriv->quirks & PL2303_QUIRK_LEGACY) |
362eb026 | 661 | pl2303_vendor_write(serial, 0x0, 0x41); |
7f966ac7 JH |
662 | else |
663 | pl2303_vendor_write(serial, 0x0, 0x61); | |
715f9527 | 664 | } else { |
362eb026 | 665 | pl2303_vendor_write(serial, 0x0, 0x0); |
1da177e4 | 666 | } |
572d3138 TG |
667 | |
668 | kfree(buf); | |
669 | } | |
670 | ||
335f8514 AC |
671 | static void pl2303_dtr_rts(struct usb_serial_port *port, int on) |
672 | { | |
673 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
674 | unsigned long flags; | |
675 | u8 control; | |
676 | ||
677 | spin_lock_irqsave(&priv->lock, flags); | |
335f8514 AC |
678 | if (on) |
679 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
680 | else | |
681 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
682 | control = priv->line_control; | |
683 | spin_unlock_irqrestore(&priv->lock, flags); | |
ccfe8188 | 684 | |
f45d0a5a | 685 | pl2303_set_control_lines(port, control); |
335f8514 AC |
686 | } |
687 | ||
688 | static void pl2303_close(struct usb_serial_port *port) | |
572d3138 | 689 | { |
8b0127b2 | 690 | usb_serial_generic_close(port); |
572d3138 | 691 | usb_kill_urb(port->interrupt_in_urb); |
52772a7f | 692 | pl2303_set_break(port, false); |
1da177e4 LT |
693 | } |
694 | ||
a509a7e4 | 695 | static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 696 | { |
1da177e4 | 697 | struct usb_serial *serial = port->serial; |
8bf769eb | 698 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); |
1da177e4 LT |
699 | int result; |
700 | ||
23c6acb9 | 701 | if (spriv->quirks & PL2303_QUIRK_LEGACY) { |
1694899f D |
702 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
703 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
3e152505 | 704 | } else { |
1da177e4 | 705 | /* reset upstream data pipes */ |
362eb026 JH |
706 | pl2303_vendor_write(serial, 8, 0); |
707 | pl2303_vendor_write(serial, 9, 0); | |
1da177e4 LT |
708 | } |
709 | ||
1da177e4 | 710 | /* Setup termios */ |
95da310e | 711 | if (tty) |
2d8f4447 | 712 | pl2303_set_termios(tty, port, NULL); |
1da177e4 | 713 | |
372db8a7 | 714 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
1da177e4 | 715 | if (result) { |
ccfe8188 JH |
716 | dev_err(&port->dev, "failed to submit interrupt urb: %d\n", |
717 | result); | |
db6e9186 | 718 | return result; |
1da177e4 | 719 | } |
d4691c3f | 720 | |
f5230a53 | 721 | result = usb_serial_generic_open(tty, port); |
d4691c3f JH |
722 | if (result) { |
723 | usb_kill_urb(port->interrupt_in_urb); | |
724 | return result; | |
725 | } | |
726 | ||
1da177e4 LT |
727 | return 0; |
728 | } | |
729 | ||
20b9d177 | 730 | static int pl2303_tiocmset(struct tty_struct *tty, |
372db8a7 | 731 | unsigned int set, unsigned int clear) |
1da177e4 | 732 | { |
95da310e | 733 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
734 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
735 | unsigned long flags; | |
736 | u8 control; | |
6f1efd6c | 737 | int ret; |
6fdd8e8e | 738 | |
372db8a7 | 739 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
740 | if (set & TIOCM_RTS) |
741 | priv->line_control |= CONTROL_RTS; | |
742 | if (set & TIOCM_DTR) | |
743 | priv->line_control |= CONTROL_DTR; | |
744 | if (clear & TIOCM_RTS) | |
745 | priv->line_control &= ~CONTROL_RTS; | |
746 | if (clear & TIOCM_DTR) | |
747 | priv->line_control &= ~CONTROL_DTR; | |
748 | control = priv->line_control; | |
372db8a7 | 749 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 750 | |
5ddbb26b JH |
751 | ret = pl2303_set_control_lines(port, control); |
752 | if (ret) | |
753 | return usb_translate_errors(ret); | |
6f1efd6c | 754 | |
5ddbb26b | 755 | return 0; |
1da177e4 LT |
756 | } |
757 | ||
60b33c13 | 758 | static int pl2303_tiocmget(struct tty_struct *tty) |
1da177e4 | 759 | { |
95da310e | 760 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
761 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
762 | unsigned long flags; | |
763 | unsigned int mcr; | |
764 | unsigned int status; | |
765 | unsigned int result; | |
766 | ||
372db8a7 | 767 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
768 | mcr = priv->line_control; |
769 | status = priv->line_status; | |
372db8a7 | 770 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
771 | |
772 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) | |
773 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) | |
774 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
775 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
776 | | ((status & UART_RING) ? TIOCM_RI : 0) | |
777 | | ((status & UART_DCD) ? TIOCM_CD : 0); | |
778 | ||
d8789b2b | 779 | dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); |
1da177e4 LT |
780 | |
781 | return result; | |
782 | } | |
783 | ||
335f8514 AC |
784 | static int pl2303_carrier_raised(struct usb_serial_port *port) |
785 | { | |
786 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
ccfe8188 | 787 | |
335f8514 AC |
788 | if (priv->line_status & UART_DCD) |
789 | return 1; | |
ccfe8188 | 790 | |
335f8514 AC |
791 | return 0; |
792 | } | |
793 | ||
00a0d0d6 | 794 | static int pl2303_ioctl(struct tty_struct *tty, |
372db8a7 | 795 | unsigned int cmd, unsigned long arg) |
1da177e4 | 796 | { |
67b9946d | 797 | struct serial_struct ser; |
95da310e | 798 | struct usb_serial_port *port = tty->driver_data; |
d8789b2b | 799 | |
1da177e4 | 800 | switch (cmd) { |
67b9946d JT |
801 | case TIOCGSERIAL: |
802 | memset(&ser, 0, sizeof ser); | |
803 | ser.type = PORT_16654; | |
e5b1e206 | 804 | ser.line = port->minor; |
1143832e | 805 | ser.port = port->port_number; |
67b9946d JT |
806 | ser.baud_base = 460800; |
807 | ||
808 | if (copy_to_user((void __user *)arg, &ser, sizeof ser)) | |
809 | return -EFAULT; | |
810 | ||
811 | return 0; | |
3a0f43e9 | 812 | default: |
3a0f43e9 | 813 | break; |
1da177e4 | 814 | } |
ccfe8188 | 815 | |
1da177e4 LT |
816 | return -ENOIOCTLCMD; |
817 | } | |
818 | ||
52772a7f | 819 | static void pl2303_set_break(struct usb_serial_port *port, bool enable) |
1da177e4 LT |
820 | { |
821 | struct usb_serial *serial = port->serial; | |
822 | u16 state; | |
823 | int result; | |
824 | ||
52772a7f | 825 | if (enable) |
1da177e4 | 826 | state = BREAK_ON; |
52772a7f JH |
827 | else |
828 | state = BREAK_OFF; | |
ccfe8188 | 829 | |
d8789b2b | 830 | dev_dbg(&port->dev, "%s - turning break %s\n", __func__, |
3a0f43e9 | 831 | state == BREAK_OFF ? "off" : "on"); |
1da177e4 | 832 | |
372db8a7 TG |
833 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
834 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, | |
835 | 0, NULL, 0, 100); | |
1da177e4 | 836 | if (result) |
d8789b2b | 837 | dev_err(&port->dev, "error sending break = %d\n", result); |
1da177e4 LT |
838 | } |
839 | ||
52772a7f JH |
840 | static void pl2303_break_ctl(struct tty_struct *tty, int state) |
841 | { | |
842 | struct usb_serial_port *port = tty->driver_data; | |
843 | ||
844 | pl2303_set_break(port, state); | |
845 | } | |
846 | ||
97bb13ec FL |
847 | static void pl2303_update_line_status(struct usb_serial_port *port, |
848 | unsigned char *data, | |
849 | unsigned int actual_length) | |
850 | { | |
228e4105 JH |
851 | struct usb_serial *serial = port->serial; |
852 | struct pl2303_serial_private *spriv = usb_get_serial_data(serial); | |
97bb13ec | 853 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
d14fc1a7 | 854 | struct tty_struct *tty; |
97bb13ec | 855 | unsigned long flags; |
228e4105 | 856 | unsigned int status_idx = UART_STATE_INDEX; |
6020c3be JH |
857 | u8 status; |
858 | u8 delta; | |
97bb13ec | 859 | |
228e4105 JH |
860 | if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) |
861 | status_idx = 0; | |
97bb13ec | 862 | |
228e4105 | 863 | if (actual_length < status_idx + 1) |
a009b75a | 864 | return; |
97bb13ec | 865 | |
6020c3be JH |
866 | status = data[status_idx]; |
867 | ||
3a0f43e9 | 868 | /* Save off the uart status for others to look at */ |
97bb13ec | 869 | spin_lock_irqsave(&priv->lock, flags); |
6020c3be JH |
870 | delta = priv->line_status ^ status; |
871 | priv->line_status = status; | |
97bb13ec | 872 | spin_unlock_irqrestore(&priv->lock, flags); |
ccfe8188 | 873 | |
6020c3be | 874 | if (status & UART_BREAK_ERROR) |
430eb0d2 | 875 | usb_serial_handle_break(port); |
ccfe8188 | 876 | |
dbfd2866 | 877 | if (delta & UART_STATE_MSR_MASK) { |
a4bcb294 JH |
878 | if (delta & UART_CTS) |
879 | port->icount.cts++; | |
880 | if (delta & UART_DSR) | |
881 | port->icount.dsr++; | |
882 | if (delta & UART_RING) | |
883 | port->icount.rng++; | |
dbfd2866 | 884 | if (delta & UART_DCD) { |
a4bcb294 | 885 | port->icount.dcd++; |
dbfd2866 JH |
886 | tty = tty_port_tty_get(&port->port); |
887 | if (tty) { | |
888 | usb_serial_handle_dcd_change(port, tty, | |
6020c3be | 889 | status & UART_DCD); |
dbfd2866 JH |
890 | tty_kref_put(tty); |
891 | } | |
6020c3be | 892 | } |
dbfd2866 JH |
893 | |
894 | wake_up_interruptible(&port->port.delta_msr_wait); | |
6020c3be | 895 | } |
97bb13ec | 896 | } |
1da177e4 | 897 | |
7d12e780 | 898 | static void pl2303_read_int_callback(struct urb *urb) |
1da177e4 | 899 | { |
cdc97792 | 900 | struct usb_serial_port *port = urb->context; |
1da177e4 | 901 | unsigned char *data = urb->transfer_buffer; |
97bb13ec | 902 | unsigned int actual_length = urb->actual_length; |
461d696a GKH |
903 | int status = urb->status; |
904 | int retval; | |
1da177e4 | 905 | |
461d696a | 906 | switch (status) { |
1da177e4 LT |
907 | case 0: |
908 | /* success */ | |
909 | break; | |
910 | case -ECONNRESET: | |
911 | case -ENOENT: | |
912 | case -ESHUTDOWN: | |
913 | /* this urb is terminated, clean up */ | |
d8789b2b GKH |
914 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
915 | __func__, status); | |
1da177e4 LT |
916 | return; |
917 | default: | |
d8789b2b GKH |
918 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
919 | __func__, status); | |
1da177e4 LT |
920 | goto exit; |
921 | } | |
922 | ||
59d33f2f | 923 | usb_serial_debug_data(&port->dev, __func__, |
372db8a7 TG |
924 | urb->actual_length, urb->transfer_buffer); |
925 | ||
97bb13ec | 926 | pl2303_update_line_status(port, data, actual_length); |
1da177e4 | 927 | |
1da177e4 | 928 | exit: |
461d696a | 929 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
ccfe8188 | 930 | if (retval) { |
d8789b2b | 931 | dev_err(&port->dev, |
372db8a7 | 932 | "%s - usb_submit_urb failed with result %d\n", |
441b62c1 | 933 | __func__, retval); |
ccfe8188 | 934 | } |
1da177e4 LT |
935 | } |
936 | ||
f08e07ac | 937 | static void pl2303_process_read_urb(struct urb *urb) |
d4fc4a7b | 938 | { |
f08e07ac JH |
939 | struct usb_serial_port *port = urb->context; |
940 | struct pl2303_private *priv = usb_get_serial_port_data(port); | |
d4fc4a7b | 941 | unsigned char *data = urb->transfer_buffer; |
d4fc4a7b | 942 | char tty_flag = TTY_NORMAL; |
f08e07ac JH |
943 | unsigned long flags; |
944 | u8 line_status; | |
945 | int i; | |
946 | ||
947 | /* update line status */ | |
948 | spin_lock_irqsave(&priv->lock, flags); | |
949 | line_status = priv->line_status; | |
950 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; | |
951 | spin_unlock_irqrestore(&priv->lock, flags); | |
f08e07ac JH |
952 | |
953 | if (!urb->actual_length) | |
954 | return; | |
955 | ||
ccfe8188 JH |
956 | /* |
957 | * Break takes precedence over parity, which takes precedence over | |
958 | * framing errors. | |
959 | */ | |
d4fc4a7b AC |
960 | if (line_status & UART_BREAK_ERROR) |
961 | tty_flag = TTY_BREAK; | |
962 | else if (line_status & UART_PARITY_ERROR) | |
963 | tty_flag = TTY_PARITY; | |
964 | else if (line_status & UART_FRAME_ERROR) | |
965 | tty_flag = TTY_FRAME; | |
d4fc4a7b | 966 | |
3ba19fe3 JH |
967 | if (tty_flag != TTY_NORMAL) |
968 | dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, | |
969 | tty_flag); | |
d4fc4a7b AC |
970 | /* overrun is special, not associated with a char */ |
971 | if (line_status & UART_OVERRUN_ERROR) | |
92a19f9c | 972 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
9388e2e7 | 973 | |
d45cc8df | 974 | if (port->port.console && port->sysrq) { |
d4fc4a7b | 975 | for (i = 0; i < urb->actual_length; ++i) |
6ee9f4b4 | 976 | if (!usb_serial_handle_sysrq_char(port, data[i])) |
92a19f9c JS |
977 | tty_insert_flip_char(&port->port, data[i], |
978 | tty_flag); | |
d45cc8df | 979 | } else { |
2f693357 | 980 | tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, |
d45cc8df | 981 | urb->actual_length); |
9388e2e7 | 982 | } |
1da177e4 | 983 | |
2e124b4a | 984 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
985 | } |
986 | ||
572d3138 TG |
987 | static struct usb_serial_driver pl2303_device = { |
988 | .driver = { | |
989 | .owner = THIS_MODULE, | |
990 | .name = "pl2303", | |
991 | }, | |
992 | .id_table = id_table, | |
590298b2 JH |
993 | .num_bulk_in = 1, |
994 | .num_bulk_out = 1, | |
9fda620a | 995 | .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ |
7919c2fd | 996 | .bulk_in_size = 256, |
3efeaff6 | 997 | .bulk_out_size = 256, |
572d3138 TG |
998 | .open = pl2303_open, |
999 | .close = pl2303_close, | |
ccfe8188 | 1000 | .dtr_rts = pl2303_dtr_rts, |
335f8514 | 1001 | .carrier_raised = pl2303_carrier_raised, |
572d3138 TG |
1002 | .ioctl = pl2303_ioctl, |
1003 | .break_ctl = pl2303_break_ctl, | |
1004 | .set_termios = pl2303_set_termios, | |
1005 | .tiocmget = pl2303_tiocmget, | |
1006 | .tiocmset = pl2303_tiocmset, | |
a4bcb294 | 1007 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
f08e07ac | 1008 | .process_read_urb = pl2303_process_read_urb, |
572d3138 | 1009 | .read_int_callback = pl2303_read_int_callback, |
228e4105 | 1010 | .probe = pl2303_probe, |
9fda620a | 1011 | .calc_num_ports = pl2303_calc_num_ports, |
572d3138 | 1012 | .attach = pl2303_startup, |
f9c99bb8 | 1013 | .release = pl2303_release, |
8bf769eb JH |
1014 | .port_probe = pl2303_port_probe, |
1015 | .port_remove = pl2303_port_remove, | |
572d3138 | 1016 | }; |
1da177e4 | 1017 | |
f667ddad AS |
1018 | static struct usb_serial_driver * const serial_drivers[] = { |
1019 | &pl2303_device, NULL | |
1020 | }; | |
1021 | ||
68e24113 | 1022 | module_usb_serial_driver(serial_drivers, id_table); |
1da177e4 | 1023 | |
ccfe8188 | 1024 | MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); |
627cfa89 | 1025 | MODULE_LICENSE("GPL v2"); |