pl2303.c 30 KB

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  1. /*
  2. * Prolific PL2303 USB to serial adaptor driver
  3. *
  4. * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
  5. * Copyright (C) 2003 IBM Corp.
  6. *
  7. * Original driver for 2.2.x by anonymous
  8. *
  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.
  12. *
  13. * See Documentation/usb/usb-serial.txt for more information on using this driver
  14. *
  15. */
  16. #include <linux/kernel.h>
  17. #include <linux/errno.h>
  18. #include <linux/init.h>
  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>
  27. #include <asm/uaccess.h>
  28. #include <linux/usb.h>
  29. #include <linux/usb/serial.h>
  30. #include "pl2303.h"
  31. /*
  32. * Version Information
  33. */
  34. #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
  35. static int debug;
  36. #define PL2303_CLOSING_WAIT (30*HZ)
  37. #define PL2303_BUF_SIZE 1024
  38. #define PL2303_TMP_BUF_SIZE 1024
  39. struct pl2303_buf {
  40. unsigned int buf_size;
  41. char *buf_buf;
  42. char *buf_get;
  43. char *buf_put;
  44. };
  45. static struct usb_device_id id_table [] = {
  46. { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
  47. { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
  48. { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
  49. { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
  50. { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
  51. { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
  52. { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
  53. { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
  54. { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
  55. { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
  56. { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
  57. { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
  58. { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
  59. { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
  60. { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
  61. { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
  62. { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
  63. { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
  64. { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
  65. { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
  66. { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
  67. { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
  68. { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
  69. { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
  70. { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
  71. { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
  72. { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
  73. { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
  74. { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
  75. { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
  76. { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
  77. { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
  78. { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_ID) },
  79. { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
  80. { } /* Terminating entry */
  81. };
  82. MODULE_DEVICE_TABLE(usb, id_table);
  83. static struct usb_driver pl2303_driver = {
  84. .name = "pl2303",
  85. .probe = usb_serial_probe,
  86. .disconnect = usb_serial_disconnect,
  87. .id_table = id_table,
  88. .no_dynamic_id = 1,
  89. };
  90. #define SET_LINE_REQUEST_TYPE 0x21
  91. #define SET_LINE_REQUEST 0x20
  92. #define SET_CONTROL_REQUEST_TYPE 0x21
  93. #define SET_CONTROL_REQUEST 0x22
  94. #define CONTROL_DTR 0x01
  95. #define CONTROL_RTS 0x02
  96. #define BREAK_REQUEST_TYPE 0x21
  97. #define BREAK_REQUEST 0x23
  98. #define BREAK_ON 0xffff
  99. #define BREAK_OFF 0x0000
  100. #define GET_LINE_REQUEST_TYPE 0xa1
  101. #define GET_LINE_REQUEST 0x21
  102. #define VENDOR_WRITE_REQUEST_TYPE 0x40
  103. #define VENDOR_WRITE_REQUEST 0x01
  104. #define VENDOR_READ_REQUEST_TYPE 0xc0
  105. #define VENDOR_READ_REQUEST 0x01
  106. #define UART_STATE 0x08
  107. #define UART_STATE_TRANSIENT_MASK 0x74
  108. #define UART_DCD 0x01
  109. #define UART_DSR 0x02
  110. #define UART_BREAK_ERROR 0x04
  111. #define UART_RING 0x08
  112. #define UART_FRAME_ERROR 0x10
  113. #define UART_PARITY_ERROR 0x20
  114. #define UART_OVERRUN_ERROR 0x40
  115. #define UART_CTS 0x80
  116. enum pl2303_type {
  117. type_0, /* don't know the difference between type 0 and */
  118. type_1, /* type 1, until someone from prolific tells us... */
  119. HX, /* HX version of the pl2303 chip */
  120. };
  121. struct pl2303_private {
  122. spinlock_t lock;
  123. struct pl2303_buf *buf;
  124. int write_urb_in_use;
  125. wait_queue_head_t delta_msr_wait;
  126. u8 line_control;
  127. u8 line_status;
  128. u8 termios_initialized;
  129. enum pl2303_type type;
  130. };
  131. /*
  132. * pl2303_buf_alloc
  133. *
  134. * Allocate a circular buffer and all associated memory.
  135. */
  136. static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
  137. {
  138. struct pl2303_buf *pb;
  139. if (size == 0)
  140. return NULL;
  141. pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
  142. if (pb == NULL)
  143. return NULL;
  144. pb->buf_buf = kmalloc(size, GFP_KERNEL);
  145. if (pb->buf_buf == NULL) {
  146. kfree(pb);
  147. return NULL;
  148. }
  149. pb->buf_size = size;
  150. pb->buf_get = pb->buf_put = pb->buf_buf;
  151. return pb;
  152. }
  153. /*
  154. * pl2303_buf_free
  155. *
  156. * Free the buffer and all associated memory.
  157. */
  158. static void pl2303_buf_free(struct pl2303_buf *pb)
  159. {
  160. if (pb) {
  161. kfree(pb->buf_buf);
  162. kfree(pb);
  163. }
  164. }
  165. /*
  166. * pl2303_buf_clear
  167. *
  168. * Clear out all data in the circular buffer.
  169. */
  170. static void pl2303_buf_clear(struct pl2303_buf *pb)
  171. {
  172. if (pb != NULL)
  173. pb->buf_get = pb->buf_put;
  174. /* equivalent to a get of all data available */
  175. }
  176. /*
  177. * pl2303_buf_data_avail
  178. *
  179. * Return the number of bytes of data available in the circular
  180. * buffer.
  181. */
  182. static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
  183. {
  184. if (pb == NULL)
  185. return 0;
  186. return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
  187. }
  188. /*
  189. * pl2303_buf_space_avail
  190. *
  191. * Return the number of bytes of space available in the circular
  192. * buffer.
  193. */
  194. static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
  195. {
  196. if (pb == NULL)
  197. return 0;
  198. return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
  199. }
  200. /*
  201. * pl2303_buf_put
  202. *
  203. * Copy data data from a user buffer and put it into the circular buffer.
  204. * Restrict to the amount of space available.
  205. *
  206. * Return the number of bytes copied.
  207. */
  208. static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
  209. unsigned int count)
  210. {
  211. unsigned int len;
  212. if (pb == NULL)
  213. return 0;
  214. len = pl2303_buf_space_avail(pb);
  215. if (count > len)
  216. count = len;
  217. if (count == 0)
  218. return 0;
  219. len = pb->buf_buf + pb->buf_size - pb->buf_put;
  220. if (count > len) {
  221. memcpy(pb->buf_put, buf, len);
  222. memcpy(pb->buf_buf, buf+len, count - len);
  223. pb->buf_put = pb->buf_buf + count - len;
  224. } else {
  225. memcpy(pb->buf_put, buf, count);
  226. if (count < len)
  227. pb->buf_put += count;
  228. else /* count == len */
  229. pb->buf_put = pb->buf_buf;
  230. }
  231. return count;
  232. }
  233. /*
  234. * pl2303_buf_get
  235. *
  236. * Get data from the circular buffer and copy to the given buffer.
  237. * Restrict to the amount of data available.
  238. *
  239. * Return the number of bytes copied.
  240. */
  241. static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
  242. unsigned int count)
  243. {
  244. unsigned int len;
  245. if (pb == NULL)
  246. return 0;
  247. len = pl2303_buf_data_avail(pb);
  248. if (count > len)
  249. count = len;
  250. if (count == 0)
  251. return 0;
  252. len = pb->buf_buf + pb->buf_size - pb->buf_get;
  253. if (count > len) {
  254. memcpy(buf, pb->buf_get, len);
  255. memcpy(buf+len, pb->buf_buf, count - len);
  256. pb->buf_get = pb->buf_buf + count - len;
  257. } else {
  258. memcpy(buf, pb->buf_get, count);
  259. if (count < len)
  260. pb->buf_get += count;
  261. else /* count == len */
  262. pb->buf_get = pb->buf_buf;
  263. }
  264. return count;
  265. }
  266. static int pl2303_startup(struct usb_serial *serial)
  267. {
  268. struct pl2303_private *priv;
  269. enum pl2303_type type = type_0;
  270. int i;
  271. if (serial->dev->descriptor.bDeviceClass == 0x02)
  272. type = type_0;
  273. else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
  274. type = HX;
  275. else if (serial->dev->descriptor.bDeviceClass == 0x00)
  276. type = type_1;
  277. else if (serial->dev->descriptor.bDeviceClass == 0xFF)
  278. type = type_1;
  279. dbg("device type: %d", type);
  280. for (i = 0; i < serial->num_ports; ++i) {
  281. priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
  282. if (!priv)
  283. goto cleanup;
  284. spin_lock_init(&priv->lock);
  285. priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
  286. if (priv->buf == NULL) {
  287. kfree(priv);
  288. goto cleanup;
  289. }
  290. init_waitqueue_head(&priv->delta_msr_wait);
  291. priv->type = type;
  292. usb_set_serial_port_data(serial->port[i], priv);
  293. }
  294. return 0;
  295. cleanup:
  296. for (--i; i>=0; --i) {
  297. priv = usb_get_serial_port_data(serial->port[i]);
  298. pl2303_buf_free(priv->buf);
  299. kfree(priv);
  300. usb_set_serial_port_data(serial->port[i], NULL);
  301. }
  302. return -ENOMEM;
  303. }
  304. static int set_control_lines(struct usb_device *dev, u8 value)
  305. {
  306. int retval;
  307. retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  308. SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
  309. value, 0, NULL, 0, 100);
  310. dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
  311. return retval;
  312. }
  313. static void pl2303_send(struct usb_serial_port *port)
  314. {
  315. int count, result;
  316. struct pl2303_private *priv = usb_get_serial_port_data(port);
  317. unsigned long flags;
  318. dbg("%s - port %d", __FUNCTION__, port->number);
  319. spin_lock_irqsave(&priv->lock, flags);
  320. if (priv->write_urb_in_use) {
  321. spin_unlock_irqrestore(&priv->lock, flags);
  322. return;
  323. }
  324. count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
  325. port->bulk_out_size);
  326. if (count == 0) {
  327. spin_unlock_irqrestore(&priv->lock, flags);
  328. return;
  329. }
  330. priv->write_urb_in_use = 1;
  331. spin_unlock_irqrestore(&priv->lock, flags);
  332. usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count,
  333. port->write_urb->transfer_buffer);
  334. port->write_urb->transfer_buffer_length = count;
  335. port->write_urb->dev = port->serial->dev;
  336. result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
  337. if (result) {
  338. dev_err(&port->dev, "%s - failed submitting write urb,"
  339. " error %d\n", __FUNCTION__, result);
  340. priv->write_urb_in_use = 0;
  341. // TODO: reschedule pl2303_send
  342. }
  343. usb_serial_port_softint(port);
  344. }
  345. static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf,
  346. int count)
  347. {
  348. struct pl2303_private *priv = usb_get_serial_port_data(port);
  349. unsigned long flags;
  350. dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
  351. if (!count)
  352. return count;
  353. spin_lock_irqsave(&priv->lock, flags);
  354. count = pl2303_buf_put(priv->buf, buf, count);
  355. spin_unlock_irqrestore(&priv->lock, flags);
  356. pl2303_send(port);
  357. return count;
  358. }
  359. static int pl2303_write_room(struct usb_serial_port *port)
  360. {
  361. struct pl2303_private *priv = usb_get_serial_port_data(port);
  362. int room = 0;
  363. unsigned long flags;
  364. dbg("%s - port %d", __FUNCTION__, port->number);
  365. spin_lock_irqsave(&priv->lock, flags);
  366. room = pl2303_buf_space_avail(priv->buf);
  367. spin_unlock_irqrestore(&priv->lock, flags);
  368. dbg("%s - returns %d", __FUNCTION__, room);
  369. return room;
  370. }
  371. static int pl2303_chars_in_buffer(struct usb_serial_port *port)
  372. {
  373. struct pl2303_private *priv = usb_get_serial_port_data(port);
  374. int chars = 0;
  375. unsigned long flags;
  376. dbg("%s - port %d", __FUNCTION__, port->number);
  377. spin_lock_irqsave(&priv->lock, flags);
  378. chars = pl2303_buf_data_avail(priv->buf);
  379. spin_unlock_irqrestore(&priv->lock, flags);
  380. dbg("%s - returns %d", __FUNCTION__, chars);
  381. return chars;
  382. }
  383. static void pl2303_set_termios(struct usb_serial_port *port,
  384. struct ktermios *old_termios)
  385. {
  386. struct usb_serial *serial = port->serial;
  387. struct pl2303_private *priv = usb_get_serial_port_data(port);
  388. unsigned long flags;
  389. unsigned int cflag;
  390. unsigned char *buf;
  391. int baud;
  392. int i;
  393. u8 control;
  394. dbg("%s - port %d", __FUNCTION__, port->number);
  395. if ((!port->tty) || (!port->tty->termios)) {
  396. dbg("%s - no tty structures", __FUNCTION__);
  397. return;
  398. }
  399. spin_lock_irqsave(&priv->lock, flags);
  400. if (!priv->termios_initialized) {
  401. *(port->tty->termios) = tty_std_termios;
  402. port->tty->termios->c_cflag = B9600 | CS8 | CREAD |
  403. HUPCL | CLOCAL;
  404. priv->termios_initialized = 1;
  405. }
  406. spin_unlock_irqrestore(&priv->lock, flags);
  407. cflag = port->tty->termios->c_cflag;
  408. buf = kzalloc(7, GFP_KERNEL);
  409. if (!buf) {
  410. dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
  411. return;
  412. }
  413. i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
  414. GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
  415. 0, 0, buf, 7, 100);
  416. dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
  417. buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
  418. if (cflag & CSIZE) {
  419. switch (cflag & CSIZE) {
  420. case CS5: buf[6] = 5; break;
  421. case CS6: buf[6] = 6; break;
  422. case CS7: buf[6] = 7; break;
  423. default:
  424. case CS8: buf[6] = 8; break;
  425. }
  426. dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
  427. }
  428. baud = tty_get_baud_rate(port->tty);;
  429. dbg("%s - baud = %d", __FUNCTION__, baud);
  430. if (baud) {
  431. buf[0] = baud & 0xff;
  432. buf[1] = (baud >> 8) & 0xff;
  433. buf[2] = (baud >> 16) & 0xff;
  434. buf[3] = (baud >> 24) & 0xff;
  435. }
  436. /* For reference buf[4]=0 is 1 stop bits */
  437. /* For reference buf[4]=1 is 1.5 stop bits */
  438. /* For reference buf[4]=2 is 2 stop bits */
  439. if (cflag & CSTOPB) {
  440. buf[4] = 2;
  441. dbg("%s - stop bits = 2", __FUNCTION__);
  442. } else {
  443. buf[4] = 0;
  444. dbg("%s - stop bits = 1", __FUNCTION__);
  445. }
  446. if (cflag & PARENB) {
  447. /* For reference buf[5]=0 is none parity */
  448. /* For reference buf[5]=1 is odd parity */
  449. /* For reference buf[5]=2 is even parity */
  450. /* For reference buf[5]=3 is mark parity */
  451. /* For reference buf[5]=4 is space parity */
  452. if (cflag & PARODD) {
  453. buf[5] = 1;
  454. dbg("%s - parity = odd", __FUNCTION__);
  455. } else {
  456. buf[5] = 2;
  457. dbg("%s - parity = even", __FUNCTION__);
  458. }
  459. } else {
  460. buf[5] = 0;
  461. dbg("%s - parity = none", __FUNCTION__);
  462. }
  463. i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
  464. SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
  465. 0, 0, buf, 7, 100);
  466. dbg("0x21:0x20:0:0 %d", i);
  467. /* change control lines if we are switching to or from B0 */
  468. spin_lock_irqsave(&priv->lock, flags);
  469. control = priv->line_control;
  470. if ((cflag & CBAUD) == B0)
  471. priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
  472. else
  473. priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
  474. if (control != priv->line_control) {
  475. control = priv->line_control;
  476. spin_unlock_irqrestore(&priv->lock, flags);
  477. set_control_lines(serial->dev, control);
  478. } else {
  479. spin_unlock_irqrestore(&priv->lock, flags);
  480. }
  481. buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
  482. i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
  483. GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
  484. 0, 0, buf, 7, 100);
  485. dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
  486. buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
  487. if (cflag & CRTSCTS) {
  488. __u16 index;
  489. if (priv->type == HX)
  490. index = 0x61;
  491. else
  492. index = 0x41;
  493. i = usb_control_msg(serial->dev,
  494. usb_sndctrlpipe(serial->dev, 0),
  495. VENDOR_WRITE_REQUEST,
  496. VENDOR_WRITE_REQUEST_TYPE,
  497. 0x0, index, NULL, 0, 100);
  498. dbg("0x40:0x1:0x0:0x%x %d", index, i);
  499. } else {
  500. i = usb_control_msg(serial->dev,
  501. usb_sndctrlpipe(serial->dev, 0),
  502. VENDOR_WRITE_REQUEST,
  503. VENDOR_WRITE_REQUEST_TYPE,
  504. 0x0, 0x0, NULL, 0, 100);
  505. dbg ("0x40:0x1:0x0:0x0 %d", i);
  506. }
  507. kfree(buf);
  508. }
  509. static void pl2303_close(struct usb_serial_port *port, struct file *filp)
  510. {
  511. struct pl2303_private *priv = usb_get_serial_port_data(port);
  512. unsigned long flags;
  513. unsigned int c_cflag;
  514. int bps;
  515. long timeout;
  516. wait_queue_t wait;
  517. dbg("%s - port %d", __FUNCTION__, port->number);
  518. /* wait for data to drain from the buffer */
  519. spin_lock_irqsave(&priv->lock, flags);
  520. timeout = PL2303_CLOSING_WAIT;
  521. init_waitqueue_entry(&wait, current);
  522. add_wait_queue(&port->tty->write_wait, &wait);
  523. for (;;) {
  524. set_current_state(TASK_INTERRUPTIBLE);
  525. if (pl2303_buf_data_avail(priv->buf) == 0 ||
  526. timeout == 0 || signal_pending(current) ||
  527. !usb_get_intfdata(port->serial->interface)) /* disconnect */
  528. break;
  529. spin_unlock_irqrestore(&priv->lock, flags);
  530. timeout = schedule_timeout(timeout);
  531. spin_lock_irqsave(&priv->lock, flags);
  532. }
  533. set_current_state(TASK_RUNNING);
  534. remove_wait_queue(&port->tty->write_wait, &wait);
  535. /* clear out any remaining data in the buffer */
  536. pl2303_buf_clear(priv->buf);
  537. spin_unlock_irqrestore(&priv->lock, flags);
  538. /* wait for characters to drain from the device */
  539. /* (this is long enough for the entire 256 byte */
  540. /* pl2303 hardware buffer to drain with no flow */
  541. /* control for data rates of 1200 bps or more, */
  542. /* for lower rates we should really know how much */
  543. /* data is in the buffer to compute a delay */
  544. /* that is not unnecessarily long) */
  545. bps = tty_get_baud_rate(port->tty);
  546. if (bps > 1200)
  547. timeout = max((HZ*2560)/bps,HZ/10);
  548. else
  549. timeout = 2*HZ;
  550. schedule_timeout_interruptible(timeout);
  551. /* shutdown our urbs */
  552. dbg("%s - shutting down urbs", __FUNCTION__);
  553. usb_kill_urb(port->write_urb);
  554. usb_kill_urb(port->read_urb);
  555. usb_kill_urb(port->interrupt_in_urb);
  556. if (port->tty) {
  557. c_cflag = port->tty->termios->c_cflag;
  558. if (c_cflag & HUPCL) {
  559. /* drop DTR and RTS */
  560. spin_lock_irqsave(&priv->lock, flags);
  561. priv->line_control = 0;
  562. spin_unlock_irqrestore(&priv->lock, flags);
  563. set_control_lines(port->serial->dev, 0);
  564. }
  565. }
  566. }
  567. static int pl2303_open(struct usb_serial_port *port, struct file *filp)
  568. {
  569. struct ktermios tmp_termios;
  570. struct usb_serial *serial = port->serial;
  571. struct pl2303_private *priv = usb_get_serial_port_data(port);
  572. unsigned char *buf;
  573. int result;
  574. dbg("%s - port %d", __FUNCTION__, port->number);
  575. if (priv->type != HX) {
  576. usb_clear_halt(serial->dev, port->write_urb->pipe);
  577. usb_clear_halt(serial->dev, port->read_urb->pipe);
  578. }
  579. buf = kmalloc(10, GFP_KERNEL);
  580. if (buf==NULL)
  581. return -ENOMEM;
  582. #define FISH(a,b,c,d) \
  583. result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
  584. b, a, c, d, buf, 1, 100); \
  585. dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
  586. #define SOUP(a,b,c,d) \
  587. result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
  588. b, a, c, d, NULL, 0, 100); \
  589. dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
  590. FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
  591. SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
  592. FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
  593. FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
  594. FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
  595. SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
  596. FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
  597. FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
  598. SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
  599. SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
  600. if (priv->type == HX) {
  601. /* HX chip */
  602. SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
  603. /* reset upstream data pipes */
  604. SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
  605. SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
  606. } else {
  607. SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
  608. }
  609. kfree(buf);
  610. /* Setup termios */
  611. if (port->tty) {
  612. pl2303_set_termios(port, &tmp_termios);
  613. }
  614. //FIXME: need to assert RTS and DTR if CRTSCTS off
  615. dbg("%s - submitting read urb", __FUNCTION__);
  616. port->read_urb->dev = serial->dev;
  617. result = usb_submit_urb(port->read_urb, GFP_KERNEL);
  618. if (result) {
  619. dev_err(&port->dev, "%s - failed submitting read urb,"
  620. " error %d\n", __FUNCTION__, result);
  621. pl2303_close(port, NULL);
  622. return -EPROTO;
  623. }
  624. dbg("%s - submitting interrupt urb", __FUNCTION__);
  625. port->interrupt_in_urb->dev = serial->dev;
  626. result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
  627. if (result) {
  628. dev_err(&port->dev, "%s - failed submitting interrupt urb,"
  629. " error %d\n", __FUNCTION__, result);
  630. pl2303_close(port, NULL);
  631. return -EPROTO;
  632. }
  633. return 0;
  634. }
  635. static int pl2303_tiocmset(struct usb_serial_port *port, struct file *file,
  636. unsigned int set, unsigned int clear)
  637. {
  638. struct pl2303_private *priv = usb_get_serial_port_data(port);
  639. unsigned long flags;
  640. u8 control;
  641. if (!usb_get_intfdata(port->serial->interface))
  642. return -ENODEV;
  643. spin_lock_irqsave(&priv->lock, flags);
  644. if (set & TIOCM_RTS)
  645. priv->line_control |= CONTROL_RTS;
  646. if (set & TIOCM_DTR)
  647. priv->line_control |= CONTROL_DTR;
  648. if (clear & TIOCM_RTS)
  649. priv->line_control &= ~CONTROL_RTS;
  650. if (clear & TIOCM_DTR)
  651. priv->line_control &= ~CONTROL_DTR;
  652. control = priv->line_control;
  653. spin_unlock_irqrestore(&priv->lock, flags);
  654. return set_control_lines(port->serial->dev, control);
  655. }
  656. static int pl2303_tiocmget(struct usb_serial_port *port, struct file *file)
  657. {
  658. struct pl2303_private *priv = usb_get_serial_port_data(port);
  659. unsigned long flags;
  660. unsigned int mcr;
  661. unsigned int status;
  662. unsigned int result;
  663. dbg("%s (%d)", __FUNCTION__, port->number);
  664. if (!usb_get_intfdata(port->serial->interface))
  665. return -ENODEV;
  666. spin_lock_irqsave(&priv->lock, flags);
  667. mcr = priv->line_control;
  668. status = priv->line_status;
  669. spin_unlock_irqrestore(&priv->lock, flags);
  670. result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
  671. | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
  672. | ((status & UART_CTS) ? TIOCM_CTS : 0)
  673. | ((status & UART_DSR) ? TIOCM_DSR : 0)
  674. | ((status & UART_RING) ? TIOCM_RI : 0)
  675. | ((status & UART_DCD) ? TIOCM_CD : 0);
  676. dbg("%s - result = %x", __FUNCTION__, result);
  677. return result;
  678. }
  679. static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
  680. {
  681. struct pl2303_private *priv = usb_get_serial_port_data(port);
  682. unsigned long flags;
  683. unsigned int prevstatus;
  684. unsigned int status;
  685. unsigned int changed;
  686. spin_lock_irqsave(&priv->lock, flags);
  687. prevstatus = priv->line_status;
  688. spin_unlock_irqrestore(&priv->lock, flags);
  689. while (1) {
  690. interruptible_sleep_on(&priv->delta_msr_wait);
  691. /* see if a signal did it */
  692. if (signal_pending(current))
  693. return -ERESTARTSYS;
  694. spin_lock_irqsave(&priv->lock, flags);
  695. status = priv->line_status;
  696. spin_unlock_irqrestore(&priv->lock, flags);
  697. changed=prevstatus^status;
  698. if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
  699. ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
  700. ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
  701. ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
  702. return 0;
  703. }
  704. prevstatus = status;
  705. }
  706. /* NOTREACHED */
  707. return 0;
  708. }
  709. static int pl2303_ioctl(struct usb_serial_port *port, struct file *file,
  710. unsigned int cmd, unsigned long arg)
  711. {
  712. dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
  713. switch (cmd) {
  714. case TIOCMIWAIT:
  715. dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
  716. return wait_modem_info(port, arg);
  717. default:
  718. dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
  719. break;
  720. }
  721. return -ENOIOCTLCMD;
  722. }
  723. static void pl2303_break_ctl(struct usb_serial_port *port, int break_state)
  724. {
  725. struct usb_serial *serial = port->serial;
  726. u16 state;
  727. int result;
  728. dbg("%s - port %d", __FUNCTION__, port->number);
  729. if (break_state == 0)
  730. state = BREAK_OFF;
  731. else
  732. state = BREAK_ON;
  733. dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
  734. result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
  735. BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
  736. 0, NULL, 0, 100);
  737. if (result)
  738. dbg("%s - error sending break = %d", __FUNCTION__, result);
  739. }
  740. static void pl2303_shutdown(struct usb_serial *serial)
  741. {
  742. int i;
  743. struct pl2303_private *priv;
  744. dbg("%s", __FUNCTION__);
  745. for (i = 0; i < serial->num_ports; ++i) {
  746. priv = usb_get_serial_port_data(serial->port[i]);
  747. if (priv) {
  748. pl2303_buf_free(priv->buf);
  749. kfree(priv);
  750. usb_set_serial_port_data(serial->port[i], NULL);
  751. }
  752. }
  753. }
  754. static void pl2303_update_line_status(struct usb_serial_port *port,
  755. unsigned char *data,
  756. unsigned int actual_length)
  757. {
  758. struct pl2303_private *priv = usb_get_serial_port_data(port);
  759. unsigned long flags;
  760. u8 status_idx = UART_STATE;
  761. u8 length = UART_STATE + 1;
  762. u16 idv, idp;
  763. idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
  764. idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
  765. if (idv == SIEMENS_VENDOR_ID) {
  766. if (idp == SIEMENS_PRODUCT_ID_X65 ||
  767. idp == SIEMENS_PRODUCT_ID_SX1 ||
  768. idp == SIEMENS_PRODUCT_ID_X75) {
  769. length = 1;
  770. status_idx = 0;
  771. }
  772. }
  773. if (actual_length < length)
  774. return;
  775. /* Save off the uart status for others to look at */
  776. spin_lock_irqsave(&priv->lock, flags);
  777. priv->line_status = data[status_idx];
  778. spin_unlock_irqrestore(&priv->lock, flags);
  779. wake_up_interruptible(&priv->delta_msr_wait);
  780. }
  781. static void pl2303_read_int_callback(struct urb *urb)
  782. {
  783. struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
  784. unsigned char *data = urb->transfer_buffer;
  785. unsigned int actual_length = urb->actual_length;
  786. int status = urb->status;
  787. int retval;
  788. dbg("%s (%d)", __FUNCTION__, port->number);
  789. switch (status) {
  790. case 0:
  791. /* success */
  792. break;
  793. case -ECONNRESET:
  794. case -ENOENT:
  795. case -ESHUTDOWN:
  796. /* this urb is terminated, clean up */
  797. dbg("%s - urb shutting down with status: %d", __FUNCTION__,
  798. status);
  799. return;
  800. default:
  801. dbg("%s - nonzero urb status received: %d", __FUNCTION__,
  802. status);
  803. goto exit;
  804. }
  805. usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
  806. urb->actual_length, urb->transfer_buffer);
  807. pl2303_update_line_status(port, data, actual_length);
  808. exit:
  809. retval = usb_submit_urb(urb, GFP_ATOMIC);
  810. if (retval)
  811. dev_err(&urb->dev->dev,
  812. "%s - usb_submit_urb failed with result %d\n",
  813. __FUNCTION__, retval);
  814. }
  815. static void pl2303_read_bulk_callback(struct urb *urb)
  816. {
  817. struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
  818. struct pl2303_private *priv = usb_get_serial_port_data(port);
  819. struct tty_struct *tty;
  820. unsigned char *data = urb->transfer_buffer;
  821. unsigned long flags;
  822. int i;
  823. int result;
  824. int status = urb->status;
  825. u8 line_status;
  826. char tty_flag;
  827. dbg("%s - port %d", __FUNCTION__, port->number);
  828. if (status) {
  829. dbg("%s - urb status = %d", __FUNCTION__, status);
  830. if (!port->open_count) {
  831. dbg("%s - port is closed, exiting.", __FUNCTION__);
  832. return;
  833. }
  834. if (status == -EPROTO) {
  835. /* PL2303 mysteriously fails with -EPROTO reschedule
  836. * the read */
  837. dbg("%s - caught -EPROTO, resubmitting the urb",
  838. __FUNCTION__);
  839. urb->dev = port->serial->dev;
  840. result = usb_submit_urb(urb, GFP_ATOMIC);
  841. if (result)
  842. dev_err(&urb->dev->dev, "%s - failed"
  843. " resubmitting read urb, error %d\n",
  844. __FUNCTION__, result);
  845. return;
  846. }
  847. dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
  848. return;
  849. }
  850. usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
  851. urb->actual_length, data);
  852. /* get tty_flag from status */
  853. tty_flag = TTY_NORMAL;
  854. spin_lock_irqsave(&priv->lock, flags);
  855. line_status = priv->line_status;
  856. priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
  857. spin_unlock_irqrestore(&priv->lock, flags);
  858. wake_up_interruptible(&priv->delta_msr_wait);
  859. /* break takes precedence over parity, */
  860. /* which takes precedence over framing errors */
  861. if (line_status & UART_BREAK_ERROR )
  862. tty_flag = TTY_BREAK;
  863. else if (line_status & UART_PARITY_ERROR)
  864. tty_flag = TTY_PARITY;
  865. else if (line_status & UART_FRAME_ERROR)
  866. tty_flag = TTY_FRAME;
  867. dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
  868. tty = port->tty;
  869. if (tty && urb->actual_length) {
  870. tty_buffer_request_room(tty, urb->actual_length + 1);
  871. /* overrun is special, not associated with a char */
  872. if (line_status & UART_OVERRUN_ERROR)
  873. tty_insert_flip_char(tty, 0, TTY_OVERRUN);
  874. for (i = 0; i < urb->actual_length; ++i)
  875. tty_insert_flip_char(tty, data[i], tty_flag);
  876. tty_flip_buffer_push(tty);
  877. }
  878. /* Schedule the next read _if_ we are still open */
  879. if (port->open_count) {
  880. urb->dev = port->serial->dev;
  881. result = usb_submit_urb(urb, GFP_ATOMIC);
  882. if (result)
  883. dev_err(&urb->dev->dev, "%s - failed resubmitting"
  884. " read urb, error %d\n", __FUNCTION__, result);
  885. }
  886. return;
  887. }
  888. static void pl2303_write_bulk_callback(struct urb *urb)
  889. {
  890. struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
  891. struct pl2303_private *priv = usb_get_serial_port_data(port);
  892. int result;
  893. int status = urb->status;
  894. dbg("%s - port %d", __FUNCTION__, port->number);
  895. switch (status) {
  896. case 0:
  897. /* success */
  898. break;
  899. case -ECONNRESET:
  900. case -ENOENT:
  901. case -ESHUTDOWN:
  902. /* this urb is terminated, clean up */
  903. dbg("%s - urb shutting down with status: %d", __FUNCTION__,
  904. status);
  905. priv->write_urb_in_use = 0;
  906. return;
  907. default:
  908. /* error in the urb, so we have to resubmit it */
  909. dbg("%s - Overflow in write", __FUNCTION__);
  910. dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
  911. status);
  912. port->write_urb->transfer_buffer_length = 1;
  913. port->write_urb->dev = port->serial->dev;
  914. result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
  915. if (result)
  916. dev_err(&urb->dev->dev, "%s - failed resubmitting write"
  917. " urb, error %d\n", __FUNCTION__, result);
  918. else
  919. return;
  920. }
  921. priv->write_urb_in_use = 0;
  922. /* send any buffered data */
  923. pl2303_send(port);
  924. }
  925. /* All of the device info needed for the PL2303 SIO serial converter */
  926. static struct usb_serial_driver pl2303_device = {
  927. .driver = {
  928. .owner = THIS_MODULE,
  929. .name = "pl2303",
  930. },
  931. .id_table = id_table,
  932. .usb_driver = &pl2303_driver,
  933. .num_interrupt_in = NUM_DONT_CARE,
  934. .num_bulk_in = 1,
  935. .num_bulk_out = 1,
  936. .num_ports = 1,
  937. .open = pl2303_open,
  938. .close = pl2303_close,
  939. .write = pl2303_write,
  940. .ioctl = pl2303_ioctl,
  941. .break_ctl = pl2303_break_ctl,
  942. .set_termios = pl2303_set_termios,
  943. .tiocmget = pl2303_tiocmget,
  944. .tiocmset = pl2303_tiocmset,
  945. .read_bulk_callback = pl2303_read_bulk_callback,
  946. .read_int_callback = pl2303_read_int_callback,
  947. .write_bulk_callback = pl2303_write_bulk_callback,
  948. .write_room = pl2303_write_room,
  949. .chars_in_buffer = pl2303_chars_in_buffer,
  950. .attach = pl2303_startup,
  951. .shutdown = pl2303_shutdown,
  952. };
  953. static int __init pl2303_init(void)
  954. {
  955. int retval;
  956. retval = usb_serial_register(&pl2303_device);
  957. if (retval)
  958. goto failed_usb_serial_register;
  959. retval = usb_register(&pl2303_driver);
  960. if (retval)
  961. goto failed_usb_register;
  962. info(DRIVER_DESC);
  963. return 0;
  964. failed_usb_register:
  965. usb_serial_deregister(&pl2303_device);
  966. failed_usb_serial_register:
  967. return retval;
  968. }
  969. static void __exit pl2303_exit(void)
  970. {
  971. usb_deregister(&pl2303_driver);
  972. usb_serial_deregister(&pl2303_device);
  973. }
  974. module_init(pl2303_init);
  975. module_exit(pl2303_exit);
  976. MODULE_DESCRIPTION(DRIVER_DESC);
  977. MODULE_LICENSE("GPL");
  978. module_param(debug, bool, S_IRUGO | S_IWUSR);
  979. MODULE_PARM_DESC(debug, "Debug enabled or not");