f81232.c 26 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Fintek F81232 USB to serial adaptor driver
  4. * Fintek F81532A/534A/535/536 USB to 2/4/8/12 serial adaptor driver
  5. *
  6. * Copyright (C) 2012 Greg Kroah-Hartman (gregkh@linuxfoundation.org)
  7. * Copyright (C) 2012 Linux Foundation
  8. */
  9. #include <linux/kernel.h>
  10. #include <linux/errno.h>
  11. #include <linux/slab.h>
  12. #include <linux/tty.h>
  13. #include <linux/tty_driver.h>
  14. #include <linux/tty_flip.h>
  15. #include <linux/serial.h>
  16. #include <linux/module.h>
  17. #include <linux/moduleparam.h>
  18. #include <linux/mutex.h>
  19. #include <linux/uaccess.h>
  20. #include <linux/usb.h>
  21. #include <linux/usb/serial.h>
  22. #include <linux/serial_reg.h>
  23. #define F81232_ID \
  24. { USB_DEVICE(0x1934, 0x0706) } /* 1 port UART device */
  25. #define F81534A_SERIES_ID \
  26. { USB_DEVICE(0x2c42, 0x1602) }, /* In-Box 2 port UART device */ \
  27. { USB_DEVICE(0x2c42, 0x1604) }, /* In-Box 4 port UART device */ \
  28. { USB_DEVICE(0x2c42, 0x1605) }, /* In-Box 8 port UART device */ \
  29. { USB_DEVICE(0x2c42, 0x1606) }, /* In-Box 12 port UART device */ \
  30. { USB_DEVICE(0x2c42, 0x1608) }, /* Non-Flash type */ \
  31. { USB_DEVICE(0x2c42, 0x1632) }, /* 2 port UART device */ \
  32. { USB_DEVICE(0x2c42, 0x1634) }, /* 4 port UART device */ \
  33. { USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \
  34. { USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */
  35. #define F81534A_CTRL_ID \
  36. { USB_DEVICE(0x2c42, 0x16f8) } /* Global control device */
  37. static const struct usb_device_id f81232_id_table[] = {
  38. F81232_ID,
  39. { } /* Terminating entry */
  40. };
  41. static const struct usb_device_id f81534a_id_table[] = {
  42. F81534A_SERIES_ID,
  43. { } /* Terminating entry */
  44. };
  45. static const struct usb_device_id f81534a_ctrl_id_table[] = {
  46. F81534A_CTRL_ID,
  47. { } /* Terminating entry */
  48. };
  49. static const struct usb_device_id combined_id_table[] = {
  50. F81232_ID,
  51. F81534A_SERIES_ID,
  52. F81534A_CTRL_ID,
  53. { } /* Terminating entry */
  54. };
  55. MODULE_DEVICE_TABLE(usb, combined_id_table);
  56. /* Maximum baudrate for F81232 */
  57. #define F81232_MAX_BAUDRATE 1500000
  58. #define F81232_DEF_BAUDRATE 9600
  59. /* USB Control EP parameter */
  60. #define F81232_REGISTER_REQUEST 0xa0
  61. #define F81232_GET_REGISTER 0xc0
  62. #define F81232_SET_REGISTER 0x40
  63. #define F81534A_ACCESS_REG_RETRY 2
  64. #define SERIAL_BASE_ADDRESS 0x0120
  65. #define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS)
  66. #define INTERRUPT_ENABLE_REGISTER (0x01 + SERIAL_BASE_ADDRESS)
  67. #define FIFO_CONTROL_REGISTER (0x02 + SERIAL_BASE_ADDRESS)
  68. #define LINE_CONTROL_REGISTER (0x03 + SERIAL_BASE_ADDRESS)
  69. #define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS)
  70. #define LINE_STATUS_REGISTER (0x05 + SERIAL_BASE_ADDRESS)
  71. #define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS)
  72. /*
  73. * F81232 Clock registers (106h)
  74. *
  75. * Bit1-0: Clock source selector
  76. * 00: 1.846MHz.
  77. * 01: 18.46MHz.
  78. * 10: 24MHz.
  79. * 11: 14.77MHz.
  80. */
  81. #define F81232_CLK_REGISTER 0x106
  82. #define F81232_CLK_1_846_MHZ 0
  83. #define F81232_CLK_18_46_MHZ BIT(0)
  84. #define F81232_CLK_24_MHZ BIT(1)
  85. #define F81232_CLK_14_77_MHZ (BIT(1) | BIT(0))
  86. #define F81232_CLK_MASK GENMASK(1, 0)
  87. #define F81534A_MODE_REG 0x107
  88. #define F81534A_TRIGGER_MASK GENMASK(3, 2)
  89. #define F81534A_TRIGGER_MULTIPLE_4X BIT(3)
  90. #define F81534A_FIFO_128BYTE (BIT(1) | BIT(0))
  91. /* Serial port self GPIO control, 2bytes [control&output data][input data] */
  92. #define F81534A_GPIO_REG 0x10e
  93. #define F81534A_GPIO_MODE2_DIR BIT(6) /* 1: input, 0: output */
  94. #define F81534A_GPIO_MODE1_DIR BIT(5)
  95. #define F81534A_GPIO_MODE0_DIR BIT(4)
  96. #define F81534A_GPIO_MODE2_OUTPUT BIT(2)
  97. #define F81534A_GPIO_MODE1_OUTPUT BIT(1)
  98. #define F81534A_GPIO_MODE0_OUTPUT BIT(0)
  99. #define F81534A_CTRL_CMD_ENABLE_PORT 0x116
  100. struct f81232_private {
  101. struct mutex lock;
  102. u8 modem_control;
  103. u8 modem_status;
  104. u8 shadow_lcr;
  105. speed_t baud_base;
  106. struct work_struct lsr_work;
  107. struct work_struct interrupt_work;
  108. struct usb_serial_port *port;
  109. };
  110. static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 };
  111. static u8 const clock_table[] = { F81232_CLK_1_846_MHZ, F81232_CLK_14_77_MHZ,
  112. F81232_CLK_18_46_MHZ, F81232_CLK_24_MHZ };
  113. static int calc_baud_divisor(speed_t baudrate, speed_t clockrate)
  114. {
  115. if (!baudrate)
  116. return 0;
  117. return DIV_ROUND_CLOSEST(clockrate, baudrate);
  118. }
  119. static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val)
  120. {
  121. int status;
  122. u8 *tmp;
  123. struct usb_device *dev = port->serial->dev;
  124. tmp = kmalloc(sizeof(*val), GFP_KERNEL);
  125. if (!tmp)
  126. return -ENOMEM;
  127. status = usb_control_msg(dev,
  128. usb_rcvctrlpipe(dev, 0),
  129. F81232_REGISTER_REQUEST,
  130. F81232_GET_REGISTER,
  131. reg,
  132. 0,
  133. tmp,
  134. sizeof(*val),
  135. USB_CTRL_GET_TIMEOUT);
  136. if (status != sizeof(*val)) {
  137. dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
  138. if (status < 0)
  139. status = usb_translate_errors(status);
  140. else
  141. status = -EIO;
  142. } else {
  143. status = 0;
  144. *val = *tmp;
  145. }
  146. kfree(tmp);
  147. return status;
  148. }
  149. static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
  150. {
  151. int status;
  152. u8 *tmp;
  153. struct usb_device *dev = port->serial->dev;
  154. tmp = kmalloc(sizeof(val), GFP_KERNEL);
  155. if (!tmp)
  156. return -ENOMEM;
  157. *tmp = val;
  158. status = usb_control_msg(dev,
  159. usb_sndctrlpipe(dev, 0),
  160. F81232_REGISTER_REQUEST,
  161. F81232_SET_REGISTER,
  162. reg,
  163. 0,
  164. tmp,
  165. sizeof(val),
  166. USB_CTRL_SET_TIMEOUT);
  167. if (status != sizeof(val)) {
  168. dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
  169. if (status < 0)
  170. status = usb_translate_errors(status);
  171. else
  172. status = -EIO;
  173. } else {
  174. status = 0;
  175. }
  176. kfree(tmp);
  177. return status;
  178. }
  179. static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg,
  180. u8 mask, u8 val)
  181. {
  182. int status;
  183. u8 tmp;
  184. status = f81232_get_register(port, reg, &tmp);
  185. if (status)
  186. return status;
  187. tmp = (tmp & ~mask) | (val & mask);
  188. return f81232_set_register(port, reg, tmp);
  189. }
  190. static void f81232_read_msr(struct usb_serial_port *port)
  191. {
  192. int status;
  193. u8 current_msr;
  194. struct tty_struct *tty;
  195. struct f81232_private *priv = usb_get_serial_port_data(port);
  196. mutex_lock(&priv->lock);
  197. status = f81232_get_register(port, MODEM_STATUS_REGISTER,
  198. &current_msr);
  199. if (status) {
  200. dev_err(&port->dev, "%s fail, status: %d\n", __func__, status);
  201. mutex_unlock(&priv->lock);
  202. return;
  203. }
  204. if (!(current_msr & UART_MSR_ANY_DELTA)) {
  205. mutex_unlock(&priv->lock);
  206. return;
  207. }
  208. priv->modem_status = current_msr;
  209. if (current_msr & UART_MSR_DCTS)
  210. port->icount.cts++;
  211. if (current_msr & UART_MSR_DDSR)
  212. port->icount.dsr++;
  213. if (current_msr & UART_MSR_TERI)
  214. port->icount.rng++;
  215. if (current_msr & UART_MSR_DDCD) {
  216. port->icount.dcd++;
  217. tty = tty_port_tty_get(&port->port);
  218. if (tty) {
  219. usb_serial_handle_dcd_change(port, tty,
  220. current_msr & UART_MSR_DCD);
  221. tty_kref_put(tty);
  222. }
  223. }
  224. wake_up_interruptible(&port->port.delta_msr_wait);
  225. mutex_unlock(&priv->lock);
  226. }
  227. static int f81232_set_mctrl(struct usb_serial_port *port,
  228. unsigned int set, unsigned int clear)
  229. {
  230. u8 val;
  231. int status;
  232. struct f81232_private *priv = usb_get_serial_port_data(port);
  233. if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0)
  234. return 0; /* no change */
  235. /* 'set' takes precedence over 'clear' */
  236. clear &= ~set;
  237. /* force enable interrupt with OUT2 */
  238. mutex_lock(&priv->lock);
  239. val = UART_MCR_OUT2 | priv->modem_control;
  240. if (clear & TIOCM_DTR)
  241. val &= ~UART_MCR_DTR;
  242. if (clear & TIOCM_RTS)
  243. val &= ~UART_MCR_RTS;
  244. if (set & TIOCM_DTR)
  245. val |= UART_MCR_DTR;
  246. if (set & TIOCM_RTS)
  247. val |= UART_MCR_RTS;
  248. dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__,
  249. val, priv->modem_control);
  250. status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val);
  251. if (status) {
  252. dev_err(&port->dev, "%s set MCR status < 0\n", __func__);
  253. mutex_unlock(&priv->lock);
  254. return status;
  255. }
  256. priv->modem_control = val;
  257. mutex_unlock(&priv->lock);
  258. return 0;
  259. }
  260. static void f81232_update_line_status(struct usb_serial_port *port,
  261. unsigned char *data,
  262. size_t actual_length)
  263. {
  264. struct f81232_private *priv = usb_get_serial_port_data(port);
  265. if (!actual_length)
  266. return;
  267. switch (data[0] & 0x07) {
  268. case 0x00: /* msr change */
  269. dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]);
  270. schedule_work(&priv->interrupt_work);
  271. break;
  272. case 0x02: /* tx-empty */
  273. break;
  274. case 0x04: /* rx data available */
  275. break;
  276. case 0x06: /* lsr change */
  277. /* we can forget it. the LSR will read from bulk-in */
  278. dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]);
  279. break;
  280. }
  281. }
  282. static void f81232_read_int_callback(struct urb *urb)
  283. {
  284. struct usb_serial_port *port = urb->context;
  285. unsigned char *data = urb->transfer_buffer;
  286. unsigned int actual_length = urb->actual_length;
  287. int status = urb->status;
  288. int retval;
  289. switch (status) {
  290. case 0:
  291. /* success */
  292. break;
  293. case -ECONNRESET:
  294. case -ENOENT:
  295. case -ESHUTDOWN:
  296. /* this urb is terminated, clean up */
  297. dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
  298. __func__, status);
  299. return;
  300. default:
  301. dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
  302. __func__, status);
  303. goto exit;
  304. }
  305. usb_serial_debug_data(&port->dev, __func__,
  306. urb->actual_length, urb->transfer_buffer);
  307. f81232_update_line_status(port, data, actual_length);
  308. exit:
  309. retval = usb_submit_urb(urb, GFP_ATOMIC);
  310. if (retval)
  311. dev_err(&urb->dev->dev,
  312. "%s - usb_submit_urb failed with result %d\n",
  313. __func__, retval);
  314. }
  315. static char f81232_handle_lsr(struct usb_serial_port *port, u8 lsr)
  316. {
  317. struct f81232_private *priv = usb_get_serial_port_data(port);
  318. char tty_flag = TTY_NORMAL;
  319. if (!(lsr & UART_LSR_BRK_ERROR_BITS))
  320. return tty_flag;
  321. if (lsr & UART_LSR_BI) {
  322. tty_flag = TTY_BREAK;
  323. port->icount.brk++;
  324. usb_serial_handle_break(port);
  325. } else if (lsr & UART_LSR_PE) {
  326. tty_flag = TTY_PARITY;
  327. port->icount.parity++;
  328. } else if (lsr & UART_LSR_FE) {
  329. tty_flag = TTY_FRAME;
  330. port->icount.frame++;
  331. }
  332. if (lsr & UART_LSR_OE) {
  333. port->icount.overrun++;
  334. schedule_work(&priv->lsr_work);
  335. tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
  336. }
  337. return tty_flag;
  338. }
  339. static void f81232_process_read_urb(struct urb *urb)
  340. {
  341. struct usb_serial_port *port = urb->context;
  342. unsigned char *data = urb->transfer_buffer;
  343. char tty_flag;
  344. unsigned int i;
  345. u8 lsr;
  346. /*
  347. * When opening the port we get a 1-byte packet with the current LSR,
  348. * which we discard.
  349. */
  350. if ((urb->actual_length < 2) || (urb->actual_length % 2))
  351. return;
  352. /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */
  353. for (i = 0; i < urb->actual_length; i += 2) {
  354. lsr = data[i];
  355. tty_flag = f81232_handle_lsr(port, lsr);
  356. if (port->sysrq) {
  357. if (usb_serial_handle_sysrq_char(port, data[i + 1]))
  358. continue;
  359. }
  360. tty_insert_flip_char(&port->port, data[i + 1], tty_flag);
  361. }
  362. tty_flip_buffer_push(&port->port);
  363. }
  364. static void f81534a_process_read_urb(struct urb *urb)
  365. {
  366. struct usb_serial_port *port = urb->context;
  367. unsigned char *data = urb->transfer_buffer;
  368. char tty_flag;
  369. unsigned int i;
  370. u8 lsr;
  371. u8 len;
  372. if (urb->actual_length < 3) {
  373. dev_err(&port->dev, "short message received: %d\n",
  374. urb->actual_length);
  375. return;
  376. }
  377. len = data[0];
  378. if (len != urb->actual_length) {
  379. dev_err(&port->dev, "malformed message received: %d (%d)\n",
  380. urb->actual_length, len);
  381. return;
  382. }
  383. /* bulk-in data: [LEN][Data.....][LSR] */
  384. lsr = data[len - 1];
  385. tty_flag = f81232_handle_lsr(port, lsr);
  386. if (port->sysrq) {
  387. for (i = 1; i < len - 1; ++i) {
  388. if (!usb_serial_handle_sysrq_char(port, data[i])) {
  389. tty_insert_flip_char(&port->port, data[i],
  390. tty_flag);
  391. }
  392. }
  393. } else {
  394. tty_insert_flip_string_fixed_flag(&port->port, &data[1],
  395. tty_flag, len - 2);
  396. }
  397. tty_flip_buffer_push(&port->port);
  398. }
  399. static void f81232_break_ctl(struct tty_struct *tty, int break_state)
  400. {
  401. struct usb_serial_port *port = tty->driver_data;
  402. struct f81232_private *priv = usb_get_serial_port_data(port);
  403. int status;
  404. mutex_lock(&priv->lock);
  405. if (break_state)
  406. priv->shadow_lcr |= UART_LCR_SBC;
  407. else
  408. priv->shadow_lcr &= ~UART_LCR_SBC;
  409. status = f81232_set_register(port, LINE_CONTROL_REGISTER,
  410. priv->shadow_lcr);
  411. if (status)
  412. dev_err(&port->dev, "set break failed: %d\n", status);
  413. mutex_unlock(&priv->lock);
  414. }
  415. static int f81232_find_clk(speed_t baudrate)
  416. {
  417. int idx;
  418. for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) {
  419. if (baudrate <= baudrate_table[idx] &&
  420. baudrate_table[idx] % baudrate == 0)
  421. return idx;
  422. }
  423. return -EINVAL;
  424. }
  425. static void f81232_set_baudrate(struct tty_struct *tty,
  426. struct usb_serial_port *port, speed_t baudrate,
  427. speed_t old_baudrate)
  428. {
  429. struct f81232_private *priv = usb_get_serial_port_data(port);
  430. u8 lcr;
  431. int divisor;
  432. int status = 0;
  433. int i;
  434. int idx;
  435. speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE };
  436. for (i = 0; i < ARRAY_SIZE(baud_list); ++i) {
  437. idx = f81232_find_clk(baud_list[i]);
  438. if (idx >= 0) {
  439. baudrate = baud_list[i];
  440. tty_encode_baud_rate(tty, baudrate, baudrate);
  441. break;
  442. }
  443. }
  444. if (idx < 0)
  445. return;
  446. priv->baud_base = baudrate_table[idx];
  447. divisor = calc_baud_divisor(baudrate, priv->baud_base);
  448. status = f81232_set_mask_register(port, F81232_CLK_REGISTER,
  449. F81232_CLK_MASK, clock_table[idx]);
  450. if (status) {
  451. dev_err(&port->dev, "%s failed to set CLK_REG: %d\n",
  452. __func__, status);
  453. return;
  454. }
  455. status = f81232_get_register(port, LINE_CONTROL_REGISTER,
  456. &lcr); /* get LCR */
  457. if (status) {
  458. dev_err(&port->dev, "%s failed to get LCR: %d\n",
  459. __func__, status);
  460. return;
  461. }
  462. status = f81232_set_register(port, LINE_CONTROL_REGISTER,
  463. lcr | UART_LCR_DLAB); /* Enable DLAB */
  464. if (status) {
  465. dev_err(&port->dev, "%s failed to set DLAB: %d\n",
  466. __func__, status);
  467. return;
  468. }
  469. status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER,
  470. divisor & 0x00ff); /* low */
  471. if (status) {
  472. dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n",
  473. __func__, status);
  474. goto reapply_lcr;
  475. }
  476. status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
  477. (divisor & 0xff00) >> 8); /* high */
  478. if (status) {
  479. dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n",
  480. __func__, status);
  481. }
  482. reapply_lcr:
  483. status = f81232_set_register(port, LINE_CONTROL_REGISTER,
  484. lcr & ~UART_LCR_DLAB);
  485. if (status) {
  486. dev_err(&port->dev, "%s failed to set DLAB: %d\n",
  487. __func__, status);
  488. }
  489. }
  490. static int f81232_port_enable(struct usb_serial_port *port)
  491. {
  492. u8 val;
  493. int status;
  494. /* fifo on, trigger8, clear TX/RX*/
  495. val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
  496. UART_FCR_CLEAR_XMIT;
  497. status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val);
  498. if (status) {
  499. dev_err(&port->dev, "%s failed to set FCR: %d\n",
  500. __func__, status);
  501. return status;
  502. }
  503. /* MSR Interrupt only, LSR will read from Bulk-in odd byte */
  504. status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
  505. UART_IER_MSI);
  506. if (status) {
  507. dev_err(&port->dev, "%s failed to set IER: %d\n",
  508. __func__, status);
  509. return status;
  510. }
  511. return 0;
  512. }
  513. static int f81232_port_disable(struct usb_serial_port *port)
  514. {
  515. int status;
  516. status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0);
  517. if (status) {
  518. dev_err(&port->dev, "%s failed to set IER: %d\n",
  519. __func__, status);
  520. return status;
  521. }
  522. return 0;
  523. }
  524. static void f81232_set_termios(struct tty_struct *tty,
  525. struct usb_serial_port *port, struct ktermios *old_termios)
  526. {
  527. struct f81232_private *priv = usb_get_serial_port_data(port);
  528. u8 new_lcr = 0;
  529. int status = 0;
  530. speed_t baudrate;
  531. speed_t old_baud;
  532. /* Don't change anything if nothing has changed */
  533. if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
  534. return;
  535. if (C_BAUD(tty) == B0)
  536. f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
  537. else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
  538. f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
  539. baudrate = tty_get_baud_rate(tty);
  540. if (baudrate > 0) {
  541. if (old_termios)
  542. old_baud = tty_termios_baud_rate(old_termios);
  543. else
  544. old_baud = F81232_DEF_BAUDRATE;
  545. f81232_set_baudrate(tty, port, baudrate, old_baud);
  546. }
  547. if (C_PARENB(tty)) {
  548. new_lcr |= UART_LCR_PARITY;
  549. if (!C_PARODD(tty))
  550. new_lcr |= UART_LCR_EPAR;
  551. if (C_CMSPAR(tty))
  552. new_lcr |= UART_LCR_SPAR;
  553. }
  554. if (C_CSTOPB(tty))
  555. new_lcr |= UART_LCR_STOP;
  556. switch (C_CSIZE(tty)) {
  557. case CS5:
  558. new_lcr |= UART_LCR_WLEN5;
  559. break;
  560. case CS6:
  561. new_lcr |= UART_LCR_WLEN6;
  562. break;
  563. case CS7:
  564. new_lcr |= UART_LCR_WLEN7;
  565. break;
  566. default:
  567. case CS8:
  568. new_lcr |= UART_LCR_WLEN8;
  569. break;
  570. }
  571. mutex_lock(&priv->lock);
  572. new_lcr |= (priv->shadow_lcr & UART_LCR_SBC);
  573. status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr);
  574. if (status) {
  575. dev_err(&port->dev, "%s failed to set LCR: %d\n",
  576. __func__, status);
  577. }
  578. priv->shadow_lcr = new_lcr;
  579. mutex_unlock(&priv->lock);
  580. }
  581. static int f81232_tiocmget(struct tty_struct *tty)
  582. {
  583. int r;
  584. struct usb_serial_port *port = tty->driver_data;
  585. struct f81232_private *port_priv = usb_get_serial_port_data(port);
  586. u8 mcr, msr;
  587. /* force get current MSR changed state */
  588. f81232_read_msr(port);
  589. mutex_lock(&port_priv->lock);
  590. mcr = port_priv->modem_control;
  591. msr = port_priv->modem_status;
  592. mutex_unlock(&port_priv->lock);
  593. r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) |
  594. (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) |
  595. (msr & UART_MSR_CTS ? TIOCM_CTS : 0) |
  596. (msr & UART_MSR_DCD ? TIOCM_CAR : 0) |
  597. (msr & UART_MSR_RI ? TIOCM_RI : 0) |
  598. (msr & UART_MSR_DSR ? TIOCM_DSR : 0);
  599. return r;
  600. }
  601. static int f81232_tiocmset(struct tty_struct *tty,
  602. unsigned int set, unsigned int clear)
  603. {
  604. struct usb_serial_port *port = tty->driver_data;
  605. return f81232_set_mctrl(port, set, clear);
  606. }
  607. static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
  608. {
  609. int result;
  610. result = f81232_port_enable(port);
  611. if (result)
  612. return result;
  613. /* Setup termios */
  614. if (tty)
  615. f81232_set_termios(tty, port, NULL);
  616. result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
  617. if (result) {
  618. dev_err(&port->dev, "%s - failed submitting interrupt urb,"
  619. " error %d\n", __func__, result);
  620. return result;
  621. }
  622. result = usb_serial_generic_open(tty, port);
  623. if (result) {
  624. usb_kill_urb(port->interrupt_in_urb);
  625. return result;
  626. }
  627. return 0;
  628. }
  629. static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port)
  630. {
  631. int status;
  632. u8 mask;
  633. u8 val;
  634. val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE;
  635. mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE;
  636. status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val);
  637. if (status) {
  638. dev_err(&port->dev, "failed to set MODE_REG: %d\n", status);
  639. return status;
  640. }
  641. return f81232_open(tty, port);
  642. }
  643. static void f81232_close(struct usb_serial_port *port)
  644. {
  645. struct f81232_private *port_priv = usb_get_serial_port_data(port);
  646. f81232_port_disable(port);
  647. usb_serial_generic_close(port);
  648. usb_kill_urb(port->interrupt_in_urb);
  649. flush_work(&port_priv->interrupt_work);
  650. flush_work(&port_priv->lsr_work);
  651. }
  652. static void f81232_dtr_rts(struct usb_serial_port *port, int on)
  653. {
  654. if (on)
  655. f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
  656. else
  657. f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
  658. }
  659. static bool f81232_tx_empty(struct usb_serial_port *port)
  660. {
  661. int status;
  662. u8 tmp;
  663. status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
  664. if (!status) {
  665. if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT)
  666. return false;
  667. }
  668. return true;
  669. }
  670. static int f81232_carrier_raised(struct usb_serial_port *port)
  671. {
  672. u8 msr;
  673. struct f81232_private *priv = usb_get_serial_port_data(port);
  674. mutex_lock(&priv->lock);
  675. msr = priv->modem_status;
  676. mutex_unlock(&priv->lock);
  677. if (msr & UART_MSR_DCD)
  678. return 1;
  679. return 0;
  680. }
  681. static int f81232_get_serial_info(struct tty_struct *tty,
  682. struct serial_struct *ss)
  683. {
  684. struct usb_serial_port *port = tty->driver_data;
  685. struct f81232_private *priv = usb_get_serial_port_data(port);
  686. ss->type = PORT_16550A;
  687. ss->line = port->minor;
  688. ss->port = port->port_number;
  689. ss->baud_base = priv->baud_base;
  690. return 0;
  691. }
  692. static void f81232_interrupt_work(struct work_struct *work)
  693. {
  694. struct f81232_private *priv =
  695. container_of(work, struct f81232_private, interrupt_work);
  696. f81232_read_msr(priv->port);
  697. }
  698. static void f81232_lsr_worker(struct work_struct *work)
  699. {
  700. struct f81232_private *priv;
  701. struct usb_serial_port *port;
  702. int status;
  703. u8 tmp;
  704. priv = container_of(work, struct f81232_private, lsr_work);
  705. port = priv->port;
  706. status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
  707. if (status)
  708. dev_warn(&port->dev, "read LSR failed: %d\n", status);
  709. }
  710. static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg,
  711. u16 size, void *val)
  712. {
  713. struct usb_device *dev = interface_to_usbdev(intf);
  714. int retry = F81534A_ACCESS_REG_RETRY;
  715. int status;
  716. u8 *tmp;
  717. tmp = kmemdup(val, size, GFP_KERNEL);
  718. if (!tmp)
  719. return -ENOMEM;
  720. while (retry--) {
  721. status = usb_control_msg(dev,
  722. usb_sndctrlpipe(dev, 0),
  723. F81232_REGISTER_REQUEST,
  724. F81232_SET_REGISTER,
  725. reg,
  726. 0,
  727. tmp,
  728. size,
  729. USB_CTRL_SET_TIMEOUT);
  730. if (status < 0) {
  731. status = usb_translate_errors(status);
  732. if (status == -EIO)
  733. continue;
  734. } else if (status != size) {
  735. /* Retry on short transfers */
  736. status = -EIO;
  737. continue;
  738. } else {
  739. status = 0;
  740. }
  741. break;
  742. }
  743. if (status) {
  744. dev_err(&intf->dev, "failed to set register 0x%x: %d\n",
  745. reg, status);
  746. }
  747. kfree(tmp);
  748. return status;
  749. }
  750. static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en)
  751. {
  752. unsigned char enable[2] = {0};
  753. int status;
  754. /*
  755. * Enable all available serial ports, define as following:
  756. * bit 15 : Reset behavior (when HUB got soft reset)
  757. * 0: maintain all serial port enabled state.
  758. * 1: disable all serial port.
  759. * bit 0~11 : Serial port enable bit.
  760. */
  761. if (en) {
  762. enable[0] = 0xff;
  763. enable[1] = 0x8f;
  764. }
  765. status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT,
  766. sizeof(enable), enable);
  767. if (status)
  768. dev_err(&intf->dev, "failed to enable ports: %d\n", status);
  769. return status;
  770. }
  771. static int f81534a_ctrl_probe(struct usb_interface *intf,
  772. const struct usb_device_id *id)
  773. {
  774. return f81534a_ctrl_enable_all_ports(intf, true);
  775. }
  776. static void f81534a_ctrl_disconnect(struct usb_interface *intf)
  777. {
  778. f81534a_ctrl_enable_all_ports(intf, false);
  779. }
  780. static int f81534a_ctrl_resume(struct usb_interface *intf)
  781. {
  782. return f81534a_ctrl_enable_all_ports(intf, true);
  783. }
  784. static int f81232_port_probe(struct usb_serial_port *port)
  785. {
  786. struct f81232_private *priv;
  787. priv = devm_kzalloc(&port->dev, sizeof(*priv), GFP_KERNEL);
  788. if (!priv)
  789. return -ENOMEM;
  790. mutex_init(&priv->lock);
  791. INIT_WORK(&priv->interrupt_work, f81232_interrupt_work);
  792. INIT_WORK(&priv->lsr_work, f81232_lsr_worker);
  793. usb_set_serial_port_data(port, priv);
  794. port->port.drain_delay = 256;
  795. priv->port = port;
  796. return 0;
  797. }
  798. static int f81534a_port_probe(struct usb_serial_port *port)
  799. {
  800. int status;
  801. /* tri-state with pull-high, default RS232 Mode */
  802. status = f81232_set_register(port, F81534A_GPIO_REG,
  803. F81534A_GPIO_MODE2_DIR);
  804. if (status)
  805. return status;
  806. return f81232_port_probe(port);
  807. }
  808. static int f81232_suspend(struct usb_serial *serial, pm_message_t message)
  809. {
  810. struct usb_serial_port *port = serial->port[0];
  811. struct f81232_private *port_priv = usb_get_serial_port_data(port);
  812. int i;
  813. for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
  814. usb_kill_urb(port->read_urbs[i]);
  815. usb_kill_urb(port->interrupt_in_urb);
  816. if (port_priv) {
  817. flush_work(&port_priv->interrupt_work);
  818. flush_work(&port_priv->lsr_work);
  819. }
  820. return 0;
  821. }
  822. static int f81232_resume(struct usb_serial *serial)
  823. {
  824. struct usb_serial_port *port = serial->port[0];
  825. int result;
  826. if (tty_port_initialized(&port->port)) {
  827. result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
  828. if (result) {
  829. dev_err(&port->dev, "submit interrupt urb failed: %d\n",
  830. result);
  831. return result;
  832. }
  833. }
  834. return usb_serial_generic_resume(serial);
  835. }
  836. static struct usb_serial_driver f81232_device = {
  837. .driver = {
  838. .owner = THIS_MODULE,
  839. .name = "f81232",
  840. },
  841. .id_table = f81232_id_table,
  842. .num_ports = 1,
  843. .bulk_in_size = 256,
  844. .bulk_out_size = 256,
  845. .open = f81232_open,
  846. .close = f81232_close,
  847. .dtr_rts = f81232_dtr_rts,
  848. .carrier_raised = f81232_carrier_raised,
  849. .get_serial = f81232_get_serial_info,
  850. .break_ctl = f81232_break_ctl,
  851. .set_termios = f81232_set_termios,
  852. .tiocmget = f81232_tiocmget,
  853. .tiocmset = f81232_tiocmset,
  854. .tiocmiwait = usb_serial_generic_tiocmiwait,
  855. .tx_empty = f81232_tx_empty,
  856. .process_read_urb = f81232_process_read_urb,
  857. .read_int_callback = f81232_read_int_callback,
  858. .port_probe = f81232_port_probe,
  859. .suspend = f81232_suspend,
  860. .resume = f81232_resume,
  861. };
  862. static struct usb_serial_driver f81534a_device = {
  863. .driver = {
  864. .owner = THIS_MODULE,
  865. .name = "f81534a",
  866. },
  867. .id_table = f81534a_id_table,
  868. .num_ports = 1,
  869. .open = f81534a_open,
  870. .close = f81232_close,
  871. .dtr_rts = f81232_dtr_rts,
  872. .carrier_raised = f81232_carrier_raised,
  873. .get_serial = f81232_get_serial_info,
  874. .break_ctl = f81232_break_ctl,
  875. .set_termios = f81232_set_termios,
  876. .tiocmget = f81232_tiocmget,
  877. .tiocmset = f81232_tiocmset,
  878. .tiocmiwait = usb_serial_generic_tiocmiwait,
  879. .tx_empty = f81232_tx_empty,
  880. .process_read_urb = f81534a_process_read_urb,
  881. .read_int_callback = f81232_read_int_callback,
  882. .port_probe = f81534a_port_probe,
  883. .suspend = f81232_suspend,
  884. .resume = f81232_resume,
  885. };
  886. static struct usb_serial_driver * const serial_drivers[] = {
  887. &f81232_device,
  888. &f81534a_device,
  889. NULL,
  890. };
  891. static struct usb_driver f81534a_ctrl_driver = {
  892. .name = "f81534a_ctrl",
  893. .id_table = f81534a_ctrl_id_table,
  894. .probe = f81534a_ctrl_probe,
  895. .disconnect = f81534a_ctrl_disconnect,
  896. .resume = f81534a_ctrl_resume,
  897. };
  898. static int __init f81232_init(void)
  899. {
  900. int status;
  901. status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE,
  902. KBUILD_MODNAME);
  903. if (status)
  904. return status;
  905. status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME,
  906. combined_id_table);
  907. if (status) {
  908. usb_deregister(&f81534a_ctrl_driver);
  909. return status;
  910. }
  911. return 0;
  912. }
  913. static void __exit f81232_exit(void)
  914. {
  915. usb_serial_deregister_drivers(serial_drivers);
  916. usb_deregister(&f81534a_ctrl_driver);
  917. }
  918. module_init(f81232_init);
  919. module_exit(f81232_exit);
  920. MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver");
  921. MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
  922. MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>");
  923. MODULE_LICENSE("GPL v2");