cp210x.c 25 KB

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  1. /*
  2. * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
  3. *
  4. * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
  5. *
  6. * This program is free software; you can redistribute it and/or
  7. * modify it under the terms of the GNU General Public License version
  8. * 2 as published by the Free Software Foundation.
  9. *
  10. * Support to set flow control line levels using TIOCMGET and TIOCMSET
  11. * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
  12. * control thanks to Munir Nassar nassarmu@real-time.com
  13. *
  14. */
  15. #include <linux/kernel.h>
  16. #include <linux/errno.h>
  17. #include <linux/slab.h>
  18. #include <linux/tty.h>
  19. #include <linux/tty_flip.h>
  20. #include <linux/module.h>
  21. #include <linux/moduleparam.h>
  22. #include <linux/usb.h>
  23. #include <linux/uaccess.h>
  24. #include <linux/usb/serial.h>
  25. /*
  26. * Version Information
  27. */
  28. #define DRIVER_VERSION "v0.09"
  29. #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
  30. /*
  31. * Function Prototypes
  32. */
  33. static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
  34. static void cp210x_close(struct usb_serial_port *);
  35. static void cp210x_get_termios(struct tty_struct *,
  36. struct usb_serial_port *port);
  37. static void cp210x_get_termios_port(struct usb_serial_port *port,
  38. unsigned int *cflagp, unsigned int *baudp);
  39. static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
  40. struct ktermios*);
  41. static int cp210x_tiocmget(struct tty_struct *);
  42. static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
  43. static int cp210x_tiocmset_port(struct usb_serial_port *port,
  44. unsigned int, unsigned int);
  45. static void cp210x_break_ctl(struct tty_struct *, int);
  46. static int cp210x_startup(struct usb_serial *);
  47. static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
  48. static int debug;
  49. static const struct usb_device_id id_table[] = {
  50. { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
  51. { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
  52. { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
  53. { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
  54. { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
  55. { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
  56. { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
  57. { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
  58. { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
  59. { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
  60. { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
  61. { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
  62. { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
  63. { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
  64. { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
  65. { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
  66. { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
  67. { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
  68. { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
  69. { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
  70. { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
  71. { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
  72. { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
  73. { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
  74. { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
  75. { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
  76. { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
  77. { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
  78. { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
  79. { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
  80. { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
  81. { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
  82. { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
  83. { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
  84. { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
  85. { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
  86. { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
  87. { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
  88. { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
  89. { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
  90. { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
  91. { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
  92. { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
  93. { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
  94. { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
  95. { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
  96. { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
  97. { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
  98. { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
  99. { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
  100. { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
  101. { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
  102. { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
  103. { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
  104. { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
  105. { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
  106. { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
  107. { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
  108. { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
  109. { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
  110. { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
  111. { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
  112. { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
  113. { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
  114. { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
  115. { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
  116. { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
  117. { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
  118. { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
  119. { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
  120. { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
  121. { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
  122. { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
  123. { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
  124. { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
  125. { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
  126. { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
  127. { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
  128. { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
  129. { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
  130. { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
  131. { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
  132. { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
  133. { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
  134. { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
  135. { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
  136. { } /* Terminating Entry */
  137. };
  138. MODULE_DEVICE_TABLE(usb, id_table);
  139. static struct usb_driver cp210x_driver = {
  140. .name = "cp210x",
  141. .probe = usb_serial_probe,
  142. .disconnect = usb_serial_disconnect,
  143. .id_table = id_table,
  144. .no_dynamic_id = 1,
  145. };
  146. static struct usb_serial_driver cp210x_device = {
  147. .driver = {
  148. .owner = THIS_MODULE,
  149. .name = "cp210x",
  150. },
  151. .usb_driver = &cp210x_driver,
  152. .id_table = id_table,
  153. .num_ports = 1,
  154. .bulk_in_size = 256,
  155. .bulk_out_size = 256,
  156. .open = cp210x_open,
  157. .close = cp210x_close,
  158. .break_ctl = cp210x_break_ctl,
  159. .set_termios = cp210x_set_termios,
  160. .tiocmget = cp210x_tiocmget,
  161. .tiocmset = cp210x_tiocmset,
  162. .attach = cp210x_startup,
  163. .dtr_rts = cp210x_dtr_rts
  164. };
  165. /* Config request types */
  166. #define REQTYPE_HOST_TO_DEVICE 0x41
  167. #define REQTYPE_DEVICE_TO_HOST 0xc1
  168. /* Config request codes */
  169. #define CP210X_IFC_ENABLE 0x00
  170. #define CP210X_SET_BAUDDIV 0x01
  171. #define CP210X_GET_BAUDDIV 0x02
  172. #define CP210X_SET_LINE_CTL 0x03
  173. #define CP210X_GET_LINE_CTL 0x04
  174. #define CP210X_SET_BREAK 0x05
  175. #define CP210X_IMM_CHAR 0x06
  176. #define CP210X_SET_MHS 0x07
  177. #define CP210X_GET_MDMSTS 0x08
  178. #define CP210X_SET_XON 0x09
  179. #define CP210X_SET_XOFF 0x0A
  180. #define CP210X_SET_EVENTMASK 0x0B
  181. #define CP210X_GET_EVENTMASK 0x0C
  182. #define CP210X_SET_CHAR 0x0D
  183. #define CP210X_GET_CHARS 0x0E
  184. #define CP210X_GET_PROPS 0x0F
  185. #define CP210X_GET_COMM_STATUS 0x10
  186. #define CP210X_RESET 0x11
  187. #define CP210X_PURGE 0x12
  188. #define CP210X_SET_FLOW 0x13
  189. #define CP210X_GET_FLOW 0x14
  190. #define CP210X_EMBED_EVENTS 0x15
  191. #define CP210X_GET_EVENTSTATE 0x16
  192. #define CP210X_SET_CHARS 0x19
  193. /* CP210X_IFC_ENABLE */
  194. #define UART_ENABLE 0x0001
  195. #define UART_DISABLE 0x0000
  196. /* CP210X_(SET|GET)_BAUDDIV */
  197. #define BAUD_RATE_GEN_FREQ 0x384000
  198. /* CP210X_(SET|GET)_LINE_CTL */
  199. #define BITS_DATA_MASK 0X0f00
  200. #define BITS_DATA_5 0X0500
  201. #define BITS_DATA_6 0X0600
  202. #define BITS_DATA_7 0X0700
  203. #define BITS_DATA_8 0X0800
  204. #define BITS_DATA_9 0X0900
  205. #define BITS_PARITY_MASK 0x00f0
  206. #define BITS_PARITY_NONE 0x0000
  207. #define BITS_PARITY_ODD 0x0010
  208. #define BITS_PARITY_EVEN 0x0020
  209. #define BITS_PARITY_MARK 0x0030
  210. #define BITS_PARITY_SPACE 0x0040
  211. #define BITS_STOP_MASK 0x000f
  212. #define BITS_STOP_1 0x0000
  213. #define BITS_STOP_1_5 0x0001
  214. #define BITS_STOP_2 0x0002
  215. /* CP210X_SET_BREAK */
  216. #define BREAK_ON 0x0001
  217. #define BREAK_OFF 0x0000
  218. /* CP210X_(SET_MHS|GET_MDMSTS) */
  219. #define CONTROL_DTR 0x0001
  220. #define CONTROL_RTS 0x0002
  221. #define CONTROL_CTS 0x0010
  222. #define CONTROL_DSR 0x0020
  223. #define CONTROL_RING 0x0040
  224. #define CONTROL_DCD 0x0080
  225. #define CONTROL_WRITE_DTR 0x0100
  226. #define CONTROL_WRITE_RTS 0x0200
  227. /*
  228. * cp210x_get_config
  229. * Reads from the CP210x configuration registers
  230. * 'size' is specified in bytes.
  231. * 'data' is a pointer to a pre-allocated array of integers large
  232. * enough to hold 'size' bytes (with 4 bytes to each integer)
  233. */
  234. static int cp210x_get_config(struct usb_serial_port *port, u8 request,
  235. unsigned int *data, int size)
  236. {
  237. struct usb_serial *serial = port->serial;
  238. __le32 *buf;
  239. int result, i, length;
  240. /* Number of integers required to contain the array */
  241. length = (((size - 1) | 3) + 1)/4;
  242. buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
  243. if (!buf) {
  244. dev_err(&port->dev, "%s - out of memory.\n", __func__);
  245. return -ENOMEM;
  246. }
  247. /* Issue the request, attempting to read 'size' bytes */
  248. result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
  249. request, REQTYPE_DEVICE_TO_HOST, 0x0000,
  250. 0, buf, size, 300);
  251. /* Convert data into an array of integers */
  252. for (i = 0; i < length; i++)
  253. data[i] = le32_to_cpu(buf[i]);
  254. kfree(buf);
  255. if (result != size) {
  256. dbg("%s - Unable to send config request, "
  257. "request=0x%x size=%d result=%d\n",
  258. __func__, request, size, result);
  259. return -EPROTO;
  260. }
  261. return 0;
  262. }
  263. /*
  264. * cp210x_set_config
  265. * Writes to the CP210x configuration registers
  266. * Values less than 16 bits wide are sent directly
  267. * 'size' is specified in bytes.
  268. */
  269. static int cp210x_set_config(struct usb_serial_port *port, u8 request,
  270. unsigned int *data, int size)
  271. {
  272. struct usb_serial *serial = port->serial;
  273. __le32 *buf;
  274. int result, i, length;
  275. /* Number of integers required to contain the array */
  276. length = (((size - 1) | 3) + 1)/4;
  277. buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
  278. if (!buf) {
  279. dev_err(&port->dev, "%s - out of memory.\n",
  280. __func__);
  281. return -ENOMEM;
  282. }
  283. /* Array of integers into bytes */
  284. for (i = 0; i < length; i++)
  285. buf[i] = cpu_to_le32(data[i]);
  286. if (size > 2) {
  287. result = usb_control_msg(serial->dev,
  288. usb_sndctrlpipe(serial->dev, 0),
  289. request, REQTYPE_HOST_TO_DEVICE, 0x0000,
  290. 0, buf, size, 300);
  291. } else {
  292. result = usb_control_msg(serial->dev,
  293. usb_sndctrlpipe(serial->dev, 0),
  294. request, REQTYPE_HOST_TO_DEVICE, data[0],
  295. 0, NULL, 0, 300);
  296. }
  297. kfree(buf);
  298. if ((size > 2 && result != size) || result < 0) {
  299. dbg("%s - Unable to send request, "
  300. "request=0x%x size=%d result=%d\n",
  301. __func__, request, size, result);
  302. return -EPROTO;
  303. }
  304. return 0;
  305. }
  306. /*
  307. * cp210x_set_config_single
  308. * Convenience function for calling cp210x_set_config on single data values
  309. * without requiring an integer pointer
  310. */
  311. static inline int cp210x_set_config_single(struct usb_serial_port *port,
  312. u8 request, unsigned int data)
  313. {
  314. return cp210x_set_config(port, request, &data, 2);
  315. }
  316. /*
  317. * cp210x_quantise_baudrate
  318. * Quantises the baud rate as per AN205 Table 1
  319. */
  320. static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
  321. if (baud <= 56) baud = 0;
  322. else if (baud <= 300) baud = 300;
  323. else if (baud <= 600) baud = 600;
  324. else if (baud <= 1200) baud = 1200;
  325. else if (baud <= 1800) baud = 1800;
  326. else if (baud <= 2400) baud = 2400;
  327. else if (baud <= 4000) baud = 4000;
  328. else if (baud <= 4803) baud = 4800;
  329. else if (baud <= 7207) baud = 7200;
  330. else if (baud <= 9612) baud = 9600;
  331. else if (baud <= 14428) baud = 14400;
  332. else if (baud <= 16062) baud = 16000;
  333. else if (baud <= 19250) baud = 19200;
  334. else if (baud <= 28912) baud = 28800;
  335. else if (baud <= 38601) baud = 38400;
  336. else if (baud <= 51558) baud = 51200;
  337. else if (baud <= 56280) baud = 56000;
  338. else if (baud <= 58053) baud = 57600;
  339. else if (baud <= 64111) baud = 64000;
  340. else if (baud <= 77608) baud = 76800;
  341. else if (baud <= 117028) baud = 115200;
  342. else if (baud <= 129347) baud = 128000;
  343. else if (baud <= 156868) baud = 153600;
  344. else if (baud <= 237832) baud = 230400;
  345. else if (baud <= 254234) baud = 250000;
  346. else if (baud <= 273066) baud = 256000;
  347. else if (baud <= 491520) baud = 460800;
  348. else if (baud <= 567138) baud = 500000;
  349. else if (baud <= 670254) baud = 576000;
  350. else if (baud <= 1053257) baud = 921600;
  351. else if (baud <= 1474560) baud = 1228800;
  352. else if (baud <= 2457600) baud = 1843200;
  353. else baud = 3686400;
  354. return baud;
  355. }
  356. static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
  357. {
  358. int result;
  359. dbg("%s - port %d", __func__, port->number);
  360. if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
  361. dev_err(&port->dev, "%s - Unable to enable UART\n",
  362. __func__);
  363. return -EPROTO;
  364. }
  365. result = usb_serial_generic_open(tty, port);
  366. if (result)
  367. return result;
  368. /* Configure the termios structure */
  369. cp210x_get_termios(tty, port);
  370. return 0;
  371. }
  372. static void cp210x_close(struct usb_serial_port *port)
  373. {
  374. dbg("%s - port %d", __func__, port->number);
  375. usb_serial_generic_close(port);
  376. mutex_lock(&port->serial->disc_mutex);
  377. if (!port->serial->disconnected)
  378. cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
  379. mutex_unlock(&port->serial->disc_mutex);
  380. }
  381. /*
  382. * cp210x_get_termios
  383. * Reads the baud rate, data bits, parity, stop bits and flow control mode
  384. * from the device, corrects any unsupported values, and configures the
  385. * termios structure to reflect the state of the device
  386. */
  387. static void cp210x_get_termios(struct tty_struct *tty,
  388. struct usb_serial_port *port)
  389. {
  390. unsigned int baud;
  391. if (tty) {
  392. cp210x_get_termios_port(tty->driver_data,
  393. &tty->termios->c_cflag, &baud);
  394. tty_encode_baud_rate(tty, baud, baud);
  395. }
  396. else {
  397. unsigned int cflag;
  398. cflag = 0;
  399. cp210x_get_termios_port(port, &cflag, &baud);
  400. }
  401. }
  402. /*
  403. * cp210x_get_termios_port
  404. * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
  405. */
  406. static void cp210x_get_termios_port(struct usb_serial_port *port,
  407. unsigned int *cflagp, unsigned int *baudp)
  408. {
  409. unsigned int cflag, modem_ctl[4];
  410. unsigned int baud;
  411. unsigned int bits;
  412. dbg("%s - port %d", __func__, port->number);
  413. cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
  414. /* Convert to baudrate */
  415. if (baud)
  416. baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
  417. dbg("%s - baud rate = %d", __func__, baud);
  418. *baudp = baud;
  419. cflag = *cflagp;
  420. cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
  421. cflag &= ~CSIZE;
  422. switch (bits & BITS_DATA_MASK) {
  423. case BITS_DATA_5:
  424. dbg("%s - data bits = 5", __func__);
  425. cflag |= CS5;
  426. break;
  427. case BITS_DATA_6:
  428. dbg("%s - data bits = 6", __func__);
  429. cflag |= CS6;
  430. break;
  431. case BITS_DATA_7:
  432. dbg("%s - data bits = 7", __func__);
  433. cflag |= CS7;
  434. break;
  435. case BITS_DATA_8:
  436. dbg("%s - data bits = 8", __func__);
  437. cflag |= CS8;
  438. break;
  439. case BITS_DATA_9:
  440. dbg("%s - data bits = 9 (not supported, using 8 data bits)",
  441. __func__);
  442. cflag |= CS8;
  443. bits &= ~BITS_DATA_MASK;
  444. bits |= BITS_DATA_8;
  445. cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
  446. break;
  447. default:
  448. dbg("%s - Unknown number of data bits, using 8", __func__);
  449. cflag |= CS8;
  450. bits &= ~BITS_DATA_MASK;
  451. bits |= BITS_DATA_8;
  452. cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
  453. break;
  454. }
  455. switch (bits & BITS_PARITY_MASK) {
  456. case BITS_PARITY_NONE:
  457. dbg("%s - parity = NONE", __func__);
  458. cflag &= ~PARENB;
  459. break;
  460. case BITS_PARITY_ODD:
  461. dbg("%s - parity = ODD", __func__);
  462. cflag |= (PARENB|PARODD);
  463. break;
  464. case BITS_PARITY_EVEN:
  465. dbg("%s - parity = EVEN", __func__);
  466. cflag &= ~PARODD;
  467. cflag |= PARENB;
  468. break;
  469. case BITS_PARITY_MARK:
  470. dbg("%s - parity = MARK (not supported, disabling parity)",
  471. __func__);
  472. cflag &= ~PARENB;
  473. bits &= ~BITS_PARITY_MASK;
  474. cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
  475. break;
  476. case BITS_PARITY_SPACE:
  477. dbg("%s - parity = SPACE (not supported, disabling parity)",
  478. __func__);
  479. cflag &= ~PARENB;
  480. bits &= ~BITS_PARITY_MASK;
  481. cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
  482. break;
  483. default:
  484. dbg("%s - Unknown parity mode, disabling parity", __func__);
  485. cflag &= ~PARENB;
  486. bits &= ~BITS_PARITY_MASK;
  487. cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
  488. break;
  489. }
  490. cflag &= ~CSTOPB;
  491. switch (bits & BITS_STOP_MASK) {
  492. case BITS_STOP_1:
  493. dbg("%s - stop bits = 1", __func__);
  494. break;
  495. case BITS_STOP_1_5:
  496. dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
  497. __func__);
  498. bits &= ~BITS_STOP_MASK;
  499. cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
  500. break;
  501. case BITS_STOP_2:
  502. dbg("%s - stop bits = 2", __func__);
  503. cflag |= CSTOPB;
  504. break;
  505. default:
  506. dbg("%s - Unknown number of stop bits, using 1 stop bit",
  507. __func__);
  508. bits &= ~BITS_STOP_MASK;
  509. cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
  510. break;
  511. }
  512. cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
  513. if (modem_ctl[0] & 0x0008) {
  514. dbg("%s - flow control = CRTSCTS", __func__);
  515. cflag |= CRTSCTS;
  516. } else {
  517. dbg("%s - flow control = NONE", __func__);
  518. cflag &= ~CRTSCTS;
  519. }
  520. *cflagp = cflag;
  521. }
  522. static void cp210x_set_termios(struct tty_struct *tty,
  523. struct usb_serial_port *port, struct ktermios *old_termios)
  524. {
  525. unsigned int cflag, old_cflag;
  526. unsigned int baud = 0, bits;
  527. unsigned int modem_ctl[4];
  528. dbg("%s - port %d", __func__, port->number);
  529. if (!tty)
  530. return;
  531. tty->termios->c_cflag &= ~CMSPAR;
  532. cflag = tty->termios->c_cflag;
  533. old_cflag = old_termios->c_cflag;
  534. baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
  535. /* If the baud rate is to be updated*/
  536. if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
  537. dbg("%s - Setting baud rate to %d baud", __func__,
  538. baud);
  539. if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
  540. ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
  541. dbg("Baud rate requested not supported by device");
  542. baud = tty_termios_baud_rate(old_termios);
  543. }
  544. }
  545. /* Report back the resulting baud rate */
  546. tty_encode_baud_rate(tty, baud, baud);
  547. /* If the number of data bits is to be updated */
  548. if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
  549. cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
  550. bits &= ~BITS_DATA_MASK;
  551. switch (cflag & CSIZE) {
  552. case CS5:
  553. bits |= BITS_DATA_5;
  554. dbg("%s - data bits = 5", __func__);
  555. break;
  556. case CS6:
  557. bits |= BITS_DATA_6;
  558. dbg("%s - data bits = 6", __func__);
  559. break;
  560. case CS7:
  561. bits |= BITS_DATA_7;
  562. dbg("%s - data bits = 7", __func__);
  563. break;
  564. case CS8:
  565. bits |= BITS_DATA_8;
  566. dbg("%s - data bits = 8", __func__);
  567. break;
  568. /*case CS9:
  569. bits |= BITS_DATA_9;
  570. dbg("%s - data bits = 9", __func__);
  571. break;*/
  572. default:
  573. dbg("cp210x driver does not "
  574. "support the number of bits requested,"
  575. " using 8 bit mode\n");
  576. bits |= BITS_DATA_8;
  577. break;
  578. }
  579. if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
  580. dbg("Number of data bits requested "
  581. "not supported by device\n");
  582. }
  583. if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
  584. cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
  585. bits &= ~BITS_PARITY_MASK;
  586. if (cflag & PARENB) {
  587. if (cflag & PARODD) {
  588. bits |= BITS_PARITY_ODD;
  589. dbg("%s - parity = ODD", __func__);
  590. } else {
  591. bits |= BITS_PARITY_EVEN;
  592. dbg("%s - parity = EVEN", __func__);
  593. }
  594. }
  595. if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
  596. dbg("Parity mode not supported "
  597. "by device\n");
  598. }
  599. if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
  600. cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
  601. bits &= ~BITS_STOP_MASK;
  602. if (cflag & CSTOPB) {
  603. bits |= BITS_STOP_2;
  604. dbg("%s - stop bits = 2", __func__);
  605. } else {
  606. bits |= BITS_STOP_1;
  607. dbg("%s - stop bits = 1", __func__);
  608. }
  609. if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
  610. dbg("Number of stop bits requested "
  611. "not supported by device\n");
  612. }
  613. if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
  614. cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
  615. dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
  616. __func__, modem_ctl[0], modem_ctl[1],
  617. modem_ctl[2], modem_ctl[3]);
  618. if (cflag & CRTSCTS) {
  619. modem_ctl[0] &= ~0x7B;
  620. modem_ctl[0] |= 0x09;
  621. modem_ctl[1] = 0x80;
  622. dbg("%s - flow control = CRTSCTS", __func__);
  623. } else {
  624. modem_ctl[0] &= ~0x7B;
  625. modem_ctl[0] |= 0x01;
  626. modem_ctl[1] |= 0x40;
  627. dbg("%s - flow control = NONE", __func__);
  628. }
  629. dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
  630. __func__, modem_ctl[0], modem_ctl[1],
  631. modem_ctl[2], modem_ctl[3]);
  632. cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
  633. }
  634. }
  635. static int cp210x_tiocmset (struct tty_struct *tty,
  636. unsigned int set, unsigned int clear)
  637. {
  638. struct usb_serial_port *port = tty->driver_data;
  639. return cp210x_tiocmset_port(port, set, clear);
  640. }
  641. static int cp210x_tiocmset_port(struct usb_serial_port *port,
  642. unsigned int set, unsigned int clear)
  643. {
  644. unsigned int control = 0;
  645. dbg("%s - port %d", __func__, port->number);
  646. if (set & TIOCM_RTS) {
  647. control |= CONTROL_RTS;
  648. control |= CONTROL_WRITE_RTS;
  649. }
  650. if (set & TIOCM_DTR) {
  651. control |= CONTROL_DTR;
  652. control |= CONTROL_WRITE_DTR;
  653. }
  654. if (clear & TIOCM_RTS) {
  655. control &= ~CONTROL_RTS;
  656. control |= CONTROL_WRITE_RTS;
  657. }
  658. if (clear & TIOCM_DTR) {
  659. control &= ~CONTROL_DTR;
  660. control |= CONTROL_WRITE_DTR;
  661. }
  662. dbg("%s - control = 0x%.4x", __func__, control);
  663. return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
  664. }
  665. static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
  666. {
  667. if (on)
  668. cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
  669. else
  670. cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
  671. }
  672. static int cp210x_tiocmget (struct tty_struct *tty)
  673. {
  674. struct usb_serial_port *port = tty->driver_data;
  675. unsigned int control;
  676. int result;
  677. dbg("%s - port %d", __func__, port->number);
  678. cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
  679. result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
  680. |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
  681. |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
  682. |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
  683. |((control & CONTROL_RING)? TIOCM_RI : 0)
  684. |((control & CONTROL_DCD) ? TIOCM_CD : 0);
  685. dbg("%s - control = 0x%.2x", __func__, control);
  686. return result;
  687. }
  688. static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
  689. {
  690. struct usb_serial_port *port = tty->driver_data;
  691. unsigned int state;
  692. dbg("%s - port %d", __func__, port->number);
  693. if (break_state == 0)
  694. state = BREAK_OFF;
  695. else
  696. state = BREAK_ON;
  697. dbg("%s - turning break %s", __func__,
  698. state == BREAK_OFF ? "off" : "on");
  699. cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
  700. }
  701. static int cp210x_startup(struct usb_serial *serial)
  702. {
  703. /* cp210x buffers behave strangely unless device is reset */
  704. usb_reset_device(serial->dev);
  705. return 0;
  706. }
  707. static int __init cp210x_init(void)
  708. {
  709. int retval;
  710. retval = usb_serial_register(&cp210x_device);
  711. if (retval)
  712. return retval; /* Failed to register */
  713. retval = usb_register(&cp210x_driver);
  714. if (retval) {
  715. /* Failed to register */
  716. usb_serial_deregister(&cp210x_device);
  717. return retval;
  718. }
  719. /* Success */
  720. printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
  721. DRIVER_DESC "\n");
  722. return 0;
  723. }
  724. static void __exit cp210x_exit(void)
  725. {
  726. usb_deregister(&cp210x_driver);
  727. usb_serial_deregister(&cp210x_device);
  728. }
  729. module_init(cp210x_init);
  730. module_exit(cp210x_exit);
  731. MODULE_DESCRIPTION(DRIVER_DESC);
  732. MODULE_VERSION(DRIVER_VERSION);
  733. MODULE_LICENSE("GPL");
  734. module_param(debug, bool, S_IRUGO | S_IWUSR);
  735. MODULE_PARM_DESC(debug, "Enable verbose debugging messages");