fintek-cir.c 19 KB

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  1. /*
  2. * Driver for Feature Integration Technology Inc. (aka Fintek) LPC CIR
  3. *
  4. * Copyright (C) 2011 Jarod Wilson <jarod@redhat.com>
  5. *
  6. * Special thanks to Fintek for providing hardware and spec sheets.
  7. * This driver is based upon the nuvoton, ite and ene drivers for
  8. * similar hardware.
  9. *
  10. * This program is free software; you can redistribute it and/or
  11. * modify it under the terms of the GNU General Public License as
  12. * published by the Free Software Foundation; either version 2 of the
  13. * License, or (at your option) any later version.
  14. *
  15. * This program is distributed in the hope that it will be useful, but
  16. * WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18. * General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU General Public License
  21. * along with this program; if not, write to the Free Software
  22. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23. * USA
  24. */
  25. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  26. #include <linux/kernel.h>
  27. #include <linux/module.h>
  28. #include <linux/pnp.h>
  29. #include <linux/io.h>
  30. #include <linux/interrupt.h>
  31. #include <linux/sched.h>
  32. #include <linux/slab.h>
  33. #include <media/rc-core.h>
  34. #include <linux/pci_ids.h>
  35. #include "fintek-cir.h"
  36. /* write val to config reg */
  37. static inline void fintek_cr_write(struct fintek_dev *fintek, u8 val, u8 reg)
  38. {
  39. fit_dbg("%s: reg 0x%02x, val 0x%02x (ip/dp: %02x/%02x)",
  40. __func__, reg, val, fintek->cr_ip, fintek->cr_dp);
  41. outb(reg, fintek->cr_ip);
  42. outb(val, fintek->cr_dp);
  43. }
  44. /* read val from config reg */
  45. static inline u8 fintek_cr_read(struct fintek_dev *fintek, u8 reg)
  46. {
  47. u8 val;
  48. outb(reg, fintek->cr_ip);
  49. val = inb(fintek->cr_dp);
  50. fit_dbg("%s: reg 0x%02x, val 0x%02x (ip/dp: %02x/%02x)",
  51. __func__, reg, val, fintek->cr_ip, fintek->cr_dp);
  52. return val;
  53. }
  54. /* update config register bit without changing other bits */
  55. static inline void fintek_set_reg_bit(struct fintek_dev *fintek, u8 val, u8 reg)
  56. {
  57. u8 tmp = fintek_cr_read(fintek, reg) | val;
  58. fintek_cr_write(fintek, tmp, reg);
  59. }
  60. /* clear config register bit without changing other bits */
  61. static inline void fintek_clear_reg_bit(struct fintek_dev *fintek, u8 val, u8 reg)
  62. {
  63. u8 tmp = fintek_cr_read(fintek, reg) & ~val;
  64. fintek_cr_write(fintek, tmp, reg);
  65. }
  66. /* enter config mode */
  67. static inline void fintek_config_mode_enable(struct fintek_dev *fintek)
  68. {
  69. /* Enabling Config Mode explicitly requires writing 2x */
  70. outb(CONFIG_REG_ENABLE, fintek->cr_ip);
  71. outb(CONFIG_REG_ENABLE, fintek->cr_ip);
  72. }
  73. /* exit config mode */
  74. static inline void fintek_config_mode_disable(struct fintek_dev *fintek)
  75. {
  76. outb(CONFIG_REG_DISABLE, fintek->cr_ip);
  77. }
  78. /*
  79. * When you want to address a specific logical device, write its logical
  80. * device number to GCR_LOGICAL_DEV_NO
  81. */
  82. static inline void fintek_select_logical_dev(struct fintek_dev *fintek, u8 ldev)
  83. {
  84. fintek_cr_write(fintek, ldev, GCR_LOGICAL_DEV_NO);
  85. }
  86. /* write val to cir config register */
  87. static inline void fintek_cir_reg_write(struct fintek_dev *fintek, u8 val, u8 offset)
  88. {
  89. outb(val, fintek->cir_addr + offset);
  90. }
  91. /* read val from cir config register */
  92. static u8 fintek_cir_reg_read(struct fintek_dev *fintek, u8 offset)
  93. {
  94. u8 val;
  95. val = inb(fintek->cir_addr + offset);
  96. return val;
  97. }
  98. /* dump current cir register contents */
  99. static void cir_dump_regs(struct fintek_dev *fintek)
  100. {
  101. fintek_config_mode_enable(fintek);
  102. fintek_select_logical_dev(fintek, fintek->logical_dev_cir);
  103. pr_info("%s: Dump CIR logical device registers:\n", FINTEK_DRIVER_NAME);
  104. pr_info(" * CR CIR BASE ADDR: 0x%x\n",
  105. (fintek_cr_read(fintek, CIR_CR_BASE_ADDR_HI) << 8) |
  106. fintek_cr_read(fintek, CIR_CR_BASE_ADDR_LO));
  107. pr_info(" * CR CIR IRQ NUM: 0x%x\n",
  108. fintek_cr_read(fintek, CIR_CR_IRQ_SEL));
  109. fintek_config_mode_disable(fintek);
  110. pr_info("%s: Dump CIR registers:\n", FINTEK_DRIVER_NAME);
  111. pr_info(" * STATUS: 0x%x\n",
  112. fintek_cir_reg_read(fintek, CIR_STATUS));
  113. pr_info(" * CONTROL: 0x%x\n",
  114. fintek_cir_reg_read(fintek, CIR_CONTROL));
  115. pr_info(" * RX_DATA: 0x%x\n",
  116. fintek_cir_reg_read(fintek, CIR_RX_DATA));
  117. pr_info(" * TX_CONTROL: 0x%x\n",
  118. fintek_cir_reg_read(fintek, CIR_TX_CONTROL));
  119. pr_info(" * TX_DATA: 0x%x\n",
  120. fintek_cir_reg_read(fintek, CIR_TX_DATA));
  121. }
  122. /* detect hardware features */
  123. static int fintek_hw_detect(struct fintek_dev *fintek)
  124. {
  125. unsigned long flags;
  126. u8 chip_major, chip_minor;
  127. u8 vendor_major, vendor_minor;
  128. u8 portsel, ir_class;
  129. u16 vendor, chip;
  130. int ret = 0;
  131. fintek_config_mode_enable(fintek);
  132. /* Check if we're using config port 0x4e or 0x2e */
  133. portsel = fintek_cr_read(fintek, GCR_CONFIG_PORT_SEL);
  134. if (portsel == 0xff) {
  135. fit_pr(KERN_INFO, "first portsel read was bunk, trying alt");
  136. fintek_config_mode_disable(fintek);
  137. fintek->cr_ip = CR_INDEX_PORT2;
  138. fintek->cr_dp = CR_DATA_PORT2;
  139. fintek_config_mode_enable(fintek);
  140. portsel = fintek_cr_read(fintek, GCR_CONFIG_PORT_SEL);
  141. }
  142. fit_dbg("portsel reg: 0x%02x", portsel);
  143. ir_class = fintek_cir_reg_read(fintek, CIR_CR_CLASS);
  144. fit_dbg("ir_class reg: 0x%02x", ir_class);
  145. switch (ir_class) {
  146. case CLASS_RX_2TX:
  147. case CLASS_RX_1TX:
  148. fintek->hw_tx_capable = true;
  149. break;
  150. case CLASS_RX_ONLY:
  151. default:
  152. fintek->hw_tx_capable = false;
  153. break;
  154. }
  155. chip_major = fintek_cr_read(fintek, GCR_CHIP_ID_HI);
  156. chip_minor = fintek_cr_read(fintek, GCR_CHIP_ID_LO);
  157. chip = chip_major << 8 | chip_minor;
  158. vendor_major = fintek_cr_read(fintek, GCR_VENDOR_ID_HI);
  159. vendor_minor = fintek_cr_read(fintek, GCR_VENDOR_ID_LO);
  160. vendor = vendor_major << 8 | vendor_minor;
  161. if (vendor != VENDOR_ID_FINTEK)
  162. fit_pr(KERN_WARNING, "Unknown vendor ID: 0x%04x", vendor);
  163. else
  164. fit_dbg("Read Fintek vendor ID from chip");
  165. fintek_config_mode_disable(fintek);
  166. spin_lock_irqsave(&fintek->fintek_lock, flags);
  167. fintek->chip_major = chip_major;
  168. fintek->chip_minor = chip_minor;
  169. fintek->chip_vendor = vendor;
  170. /*
  171. * Newer reviews of this chipset uses port 8 instead of 5
  172. */
  173. if ((chip != 0x0408) && (chip != 0x0804))
  174. fintek->logical_dev_cir = LOGICAL_DEV_CIR_REV2;
  175. else
  176. fintek->logical_dev_cir = LOGICAL_DEV_CIR_REV1;
  177. spin_unlock_irqrestore(&fintek->fintek_lock, flags);
  178. return ret;
  179. }
  180. static void fintek_cir_ldev_init(struct fintek_dev *fintek)
  181. {
  182. /* Select CIR logical device and enable */
  183. fintek_select_logical_dev(fintek, fintek->logical_dev_cir);
  184. fintek_cr_write(fintek, LOGICAL_DEV_ENABLE, CIR_CR_DEV_EN);
  185. /* Write allocated CIR address and IRQ information to hardware */
  186. fintek_cr_write(fintek, fintek->cir_addr >> 8, CIR_CR_BASE_ADDR_HI);
  187. fintek_cr_write(fintek, fintek->cir_addr & 0xff, CIR_CR_BASE_ADDR_LO);
  188. fintek_cr_write(fintek, fintek->cir_irq, CIR_CR_IRQ_SEL);
  189. fit_dbg("CIR initialized, base io address: 0x%lx, irq: %d (len: %d)",
  190. fintek->cir_addr, fintek->cir_irq, fintek->cir_port_len);
  191. }
  192. /* enable CIR interrupts */
  193. static void fintek_enable_cir_irq(struct fintek_dev *fintek)
  194. {
  195. fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_EN, CIR_STATUS);
  196. }
  197. static void fintek_cir_regs_init(struct fintek_dev *fintek)
  198. {
  199. /* clear any and all stray interrupts */
  200. fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS);
  201. /* and finally, enable interrupts */
  202. fintek_enable_cir_irq(fintek);
  203. }
  204. static void fintek_enable_wake(struct fintek_dev *fintek)
  205. {
  206. fintek_config_mode_enable(fintek);
  207. fintek_select_logical_dev(fintek, LOGICAL_DEV_ACPI);
  208. /* Allow CIR PME's to wake system */
  209. fintek_set_reg_bit(fintek, ACPI_WAKE_EN_CIR_BIT, LDEV_ACPI_WAKE_EN_REG);
  210. /* Enable CIR PME's */
  211. fintek_set_reg_bit(fintek, ACPI_PME_CIR_BIT, LDEV_ACPI_PME_EN_REG);
  212. /* Clear CIR PME status register */
  213. fintek_set_reg_bit(fintek, ACPI_PME_CIR_BIT, LDEV_ACPI_PME_CLR_REG);
  214. /* Save state */
  215. fintek_set_reg_bit(fintek, ACPI_STATE_CIR_BIT, LDEV_ACPI_STATE_REG);
  216. fintek_config_mode_disable(fintek);
  217. }
  218. static int fintek_cmdsize(u8 cmd, u8 subcmd)
  219. {
  220. int datasize = 0;
  221. switch (cmd) {
  222. case BUF_COMMAND_NULL:
  223. if (subcmd == BUF_HW_CMD_HEADER)
  224. datasize = 1;
  225. break;
  226. case BUF_HW_CMD_HEADER:
  227. if (subcmd == BUF_CMD_G_REVISION)
  228. datasize = 2;
  229. break;
  230. case BUF_COMMAND_HEADER:
  231. switch (subcmd) {
  232. case BUF_CMD_S_CARRIER:
  233. case BUF_CMD_S_TIMEOUT:
  234. case BUF_RSP_PULSE_COUNT:
  235. datasize = 2;
  236. break;
  237. case BUF_CMD_SIG_END:
  238. case BUF_CMD_S_TXMASK:
  239. case BUF_CMD_S_RXSENSOR:
  240. datasize = 1;
  241. break;
  242. }
  243. }
  244. return datasize;
  245. }
  246. /* process ir data stored in driver buffer */
  247. static void fintek_process_rx_ir_data(struct fintek_dev *fintek)
  248. {
  249. DEFINE_IR_RAW_EVENT(rawir);
  250. u8 sample;
  251. bool event = false;
  252. int i;
  253. for (i = 0; i < fintek->pkts; i++) {
  254. sample = fintek->buf[i];
  255. switch (fintek->parser_state) {
  256. case CMD_HEADER:
  257. fintek->cmd = sample;
  258. if ((fintek->cmd == BUF_COMMAND_HEADER) ||
  259. ((fintek->cmd & BUF_COMMAND_MASK) !=
  260. BUF_PULSE_BIT)) {
  261. fintek->parser_state = SUBCMD;
  262. continue;
  263. }
  264. fintek->rem = (fintek->cmd & BUF_LEN_MASK);
  265. fit_dbg("%s: rem: 0x%02x", __func__, fintek->rem);
  266. if (fintek->rem)
  267. fintek->parser_state = PARSE_IRDATA;
  268. else
  269. ir_raw_event_reset(fintek->rdev);
  270. break;
  271. case SUBCMD:
  272. fintek->rem = fintek_cmdsize(fintek->cmd, sample);
  273. fintek->parser_state = CMD_DATA;
  274. break;
  275. case CMD_DATA:
  276. fintek->rem--;
  277. break;
  278. case PARSE_IRDATA:
  279. fintek->rem--;
  280. init_ir_raw_event(&rawir);
  281. rawir.pulse = ((sample & BUF_PULSE_BIT) != 0);
  282. rawir.duration = US_TO_NS((sample & BUF_SAMPLE_MASK)
  283. * CIR_SAMPLE_PERIOD);
  284. fit_dbg("Storing %s with duration %d",
  285. rawir.pulse ? "pulse" : "space",
  286. rawir.duration);
  287. if (ir_raw_event_store_with_filter(fintek->rdev,
  288. &rawir))
  289. event = true;
  290. break;
  291. }
  292. if ((fintek->parser_state != CMD_HEADER) && !fintek->rem)
  293. fintek->parser_state = CMD_HEADER;
  294. }
  295. fintek->pkts = 0;
  296. if (event) {
  297. fit_dbg("Calling ir_raw_event_handle");
  298. ir_raw_event_handle(fintek->rdev);
  299. }
  300. }
  301. /* copy data from hardware rx register into driver buffer */
  302. static void fintek_get_rx_ir_data(struct fintek_dev *fintek, u8 rx_irqs)
  303. {
  304. unsigned long flags;
  305. u8 sample, status;
  306. spin_lock_irqsave(&fintek->fintek_lock, flags);
  307. /*
  308. * We must read data from CIR_RX_DATA until the hardware IR buffer
  309. * is empty and clears the RX_TIMEOUT and/or RX_RECEIVE flags in
  310. * the CIR_STATUS register
  311. */
  312. do {
  313. sample = fintek_cir_reg_read(fintek, CIR_RX_DATA);
  314. fit_dbg("%s: sample: 0x%02x", __func__, sample);
  315. fintek->buf[fintek->pkts] = sample;
  316. fintek->pkts++;
  317. status = fintek_cir_reg_read(fintek, CIR_STATUS);
  318. if (!(status & CIR_STATUS_IRQ_EN))
  319. break;
  320. } while (status & rx_irqs);
  321. fintek_process_rx_ir_data(fintek);
  322. spin_unlock_irqrestore(&fintek->fintek_lock, flags);
  323. }
  324. static void fintek_cir_log_irqs(u8 status)
  325. {
  326. fit_pr(KERN_INFO, "IRQ 0x%02x:%s%s%s%s%s", status,
  327. status & CIR_STATUS_IRQ_EN ? " IRQEN" : "",
  328. status & CIR_STATUS_TX_FINISH ? " TXF" : "",
  329. status & CIR_STATUS_TX_UNDERRUN ? " TXU" : "",
  330. status & CIR_STATUS_RX_TIMEOUT ? " RXTO" : "",
  331. status & CIR_STATUS_RX_RECEIVE ? " RXOK" : "");
  332. }
  333. /* interrupt service routine for incoming and outgoing CIR data */
  334. static irqreturn_t fintek_cir_isr(int irq, void *data)
  335. {
  336. struct fintek_dev *fintek = data;
  337. u8 status, rx_irqs;
  338. fit_dbg_verbose("%s firing", __func__);
  339. fintek_config_mode_enable(fintek);
  340. fintek_select_logical_dev(fintek, fintek->logical_dev_cir);
  341. fintek_config_mode_disable(fintek);
  342. /*
  343. * Get IR Status register contents. Write 1 to ack/clear
  344. *
  345. * bit: reg name - description
  346. * 3: TX_FINISH - TX is finished
  347. * 2: TX_UNDERRUN - TX underrun
  348. * 1: RX_TIMEOUT - RX data timeout
  349. * 0: RX_RECEIVE - RX data received
  350. */
  351. status = fintek_cir_reg_read(fintek, CIR_STATUS);
  352. if (!(status & CIR_STATUS_IRQ_MASK) || status == 0xff) {
  353. fit_dbg_verbose("%s exiting, IRSTS 0x%02x", __func__, status);
  354. fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS);
  355. return IRQ_RETVAL(IRQ_NONE);
  356. }
  357. if (debug)
  358. fintek_cir_log_irqs(status);
  359. rx_irqs = status & (CIR_STATUS_RX_RECEIVE | CIR_STATUS_RX_TIMEOUT);
  360. if (rx_irqs)
  361. fintek_get_rx_ir_data(fintek, rx_irqs);
  362. /* ack/clear all irq flags we've got */
  363. fintek_cir_reg_write(fintek, status, CIR_STATUS);
  364. fit_dbg_verbose("%s done", __func__);
  365. return IRQ_RETVAL(IRQ_HANDLED);
  366. }
  367. static void fintek_enable_cir(struct fintek_dev *fintek)
  368. {
  369. /* set IRQ enabled */
  370. fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_EN, CIR_STATUS);
  371. fintek_config_mode_enable(fintek);
  372. /* enable the CIR logical device */
  373. fintek_select_logical_dev(fintek, fintek->logical_dev_cir);
  374. fintek_cr_write(fintek, LOGICAL_DEV_ENABLE, CIR_CR_DEV_EN);
  375. fintek_config_mode_disable(fintek);
  376. /* clear all pending interrupts */
  377. fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS);
  378. /* enable interrupts */
  379. fintek_enable_cir_irq(fintek);
  380. }
  381. static void fintek_disable_cir(struct fintek_dev *fintek)
  382. {
  383. fintek_config_mode_enable(fintek);
  384. /* disable the CIR logical device */
  385. fintek_select_logical_dev(fintek, fintek->logical_dev_cir);
  386. fintek_cr_write(fintek, LOGICAL_DEV_DISABLE, CIR_CR_DEV_EN);
  387. fintek_config_mode_disable(fintek);
  388. }
  389. static int fintek_open(struct rc_dev *dev)
  390. {
  391. struct fintek_dev *fintek = dev->priv;
  392. unsigned long flags;
  393. spin_lock_irqsave(&fintek->fintek_lock, flags);
  394. fintek_enable_cir(fintek);
  395. spin_unlock_irqrestore(&fintek->fintek_lock, flags);
  396. return 0;
  397. }
  398. static void fintek_close(struct rc_dev *dev)
  399. {
  400. struct fintek_dev *fintek = dev->priv;
  401. unsigned long flags;
  402. spin_lock_irqsave(&fintek->fintek_lock, flags);
  403. fintek_disable_cir(fintek);
  404. spin_unlock_irqrestore(&fintek->fintek_lock, flags);
  405. }
  406. /* Allocate memory, probe hardware, and initialize everything */
  407. static int fintek_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
  408. {
  409. struct fintek_dev *fintek;
  410. struct rc_dev *rdev;
  411. int ret = -ENOMEM;
  412. fintek = kzalloc(sizeof(struct fintek_dev), GFP_KERNEL);
  413. if (!fintek)
  414. return ret;
  415. /* input device for IR remote (and tx) */
  416. rdev = rc_allocate_device();
  417. if (!rdev)
  418. goto exit_free_dev_rdev;
  419. ret = -ENODEV;
  420. /* validate pnp resources */
  421. if (!pnp_port_valid(pdev, 0)) {
  422. dev_err(&pdev->dev, "IR PNP Port not valid!\n");
  423. goto exit_free_dev_rdev;
  424. }
  425. if (!pnp_irq_valid(pdev, 0)) {
  426. dev_err(&pdev->dev, "IR PNP IRQ not valid!\n");
  427. goto exit_free_dev_rdev;
  428. }
  429. fintek->cir_addr = pnp_port_start(pdev, 0);
  430. fintek->cir_irq = pnp_irq(pdev, 0);
  431. fintek->cir_port_len = pnp_port_len(pdev, 0);
  432. fintek->cr_ip = CR_INDEX_PORT;
  433. fintek->cr_dp = CR_DATA_PORT;
  434. spin_lock_init(&fintek->fintek_lock);
  435. pnp_set_drvdata(pdev, fintek);
  436. fintek->pdev = pdev;
  437. ret = fintek_hw_detect(fintek);
  438. if (ret)
  439. goto exit_free_dev_rdev;
  440. /* Initialize CIR & CIR Wake Logical Devices */
  441. fintek_config_mode_enable(fintek);
  442. fintek_cir_ldev_init(fintek);
  443. fintek_config_mode_disable(fintek);
  444. /* Initialize CIR & CIR Wake Config Registers */
  445. fintek_cir_regs_init(fintek);
  446. /* Set up the rc device */
  447. rdev->priv = fintek;
  448. rdev->driver_type = RC_DRIVER_IR_RAW;
  449. rdev->allowed_protos = RC_BIT_ALL;
  450. rdev->open = fintek_open;
  451. rdev->close = fintek_close;
  452. rdev->input_name = FINTEK_DESCRIPTION;
  453. rdev->input_phys = "fintek/cir0";
  454. rdev->input_id.bustype = BUS_HOST;
  455. rdev->input_id.vendor = VENDOR_ID_FINTEK;
  456. rdev->input_id.product = fintek->chip_major;
  457. rdev->input_id.version = fintek->chip_minor;
  458. rdev->dev.parent = &pdev->dev;
  459. rdev->driver_name = FINTEK_DRIVER_NAME;
  460. rdev->map_name = RC_MAP_RC6_MCE;
  461. rdev->timeout = US_TO_NS(1000);
  462. /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */
  463. rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD);
  464. fintek->rdev = rdev;
  465. ret = -EBUSY;
  466. /* now claim resources */
  467. if (!request_region(fintek->cir_addr,
  468. fintek->cir_port_len, FINTEK_DRIVER_NAME))
  469. goto exit_free_dev_rdev;
  470. if (request_irq(fintek->cir_irq, fintek_cir_isr, IRQF_SHARED,
  471. FINTEK_DRIVER_NAME, (void *)fintek))
  472. goto exit_free_cir_addr;
  473. ret = rc_register_device(rdev);
  474. if (ret)
  475. goto exit_free_irq;
  476. device_init_wakeup(&pdev->dev, true);
  477. fit_pr(KERN_NOTICE, "driver has been successfully loaded\n");
  478. if (debug)
  479. cir_dump_regs(fintek);
  480. return 0;
  481. exit_free_irq:
  482. free_irq(fintek->cir_irq, fintek);
  483. exit_free_cir_addr:
  484. release_region(fintek->cir_addr, fintek->cir_port_len);
  485. exit_free_dev_rdev:
  486. rc_free_device(rdev);
  487. kfree(fintek);
  488. return ret;
  489. }
  490. static void fintek_remove(struct pnp_dev *pdev)
  491. {
  492. struct fintek_dev *fintek = pnp_get_drvdata(pdev);
  493. unsigned long flags;
  494. spin_lock_irqsave(&fintek->fintek_lock, flags);
  495. /* disable CIR */
  496. fintek_disable_cir(fintek);
  497. fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS);
  498. /* enable CIR Wake (for IR power-on) */
  499. fintek_enable_wake(fintek);
  500. spin_unlock_irqrestore(&fintek->fintek_lock, flags);
  501. /* free resources */
  502. free_irq(fintek->cir_irq, fintek);
  503. release_region(fintek->cir_addr, fintek->cir_port_len);
  504. rc_unregister_device(fintek->rdev);
  505. kfree(fintek);
  506. }
  507. static int fintek_suspend(struct pnp_dev *pdev, pm_message_t state)
  508. {
  509. struct fintek_dev *fintek = pnp_get_drvdata(pdev);
  510. unsigned long flags;
  511. fit_dbg("%s called", __func__);
  512. spin_lock_irqsave(&fintek->fintek_lock, flags);
  513. /* disable all CIR interrupts */
  514. fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS);
  515. spin_unlock_irqrestore(&fintek->fintek_lock, flags);
  516. fintek_config_mode_enable(fintek);
  517. /* disable cir logical dev */
  518. fintek_select_logical_dev(fintek, fintek->logical_dev_cir);
  519. fintek_cr_write(fintek, LOGICAL_DEV_DISABLE, CIR_CR_DEV_EN);
  520. fintek_config_mode_disable(fintek);
  521. /* make sure wake is enabled */
  522. fintek_enable_wake(fintek);
  523. return 0;
  524. }
  525. static int fintek_resume(struct pnp_dev *pdev)
  526. {
  527. int ret = 0;
  528. struct fintek_dev *fintek = pnp_get_drvdata(pdev);
  529. fit_dbg("%s called", __func__);
  530. /* open interrupt */
  531. fintek_enable_cir_irq(fintek);
  532. /* Enable CIR logical device */
  533. fintek_config_mode_enable(fintek);
  534. fintek_select_logical_dev(fintek, fintek->logical_dev_cir);
  535. fintek_cr_write(fintek, LOGICAL_DEV_ENABLE, CIR_CR_DEV_EN);
  536. fintek_config_mode_disable(fintek);
  537. fintek_cir_regs_init(fintek);
  538. return ret;
  539. }
  540. static void fintek_shutdown(struct pnp_dev *pdev)
  541. {
  542. struct fintek_dev *fintek = pnp_get_drvdata(pdev);
  543. fintek_enable_wake(fintek);
  544. }
  545. static const struct pnp_device_id fintek_ids[] = {
  546. { "FIT0002", 0 }, /* CIR */
  547. { "", 0 },
  548. };
  549. static struct pnp_driver fintek_driver = {
  550. .name = FINTEK_DRIVER_NAME,
  551. .id_table = fintek_ids,
  552. .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
  553. .probe = fintek_probe,
  554. .remove = fintek_remove,
  555. .suspend = fintek_suspend,
  556. .resume = fintek_resume,
  557. .shutdown = fintek_shutdown,
  558. };
  559. static int fintek_init(void)
  560. {
  561. return pnp_register_driver(&fintek_driver);
  562. }
  563. static void fintek_exit(void)
  564. {
  565. pnp_unregister_driver(&fintek_driver);
  566. }
  567. module_param(debug, int, S_IRUGO | S_IWUSR);
  568. MODULE_PARM_DESC(debug, "Enable debugging output");
  569. MODULE_DEVICE_TABLE(pnp, fintek_ids);
  570. MODULE_DESCRIPTION(FINTEK_DESCRIPTION " driver");
  571. MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
  572. MODULE_LICENSE("GPL");
  573. module_init(fintek_init);
  574. module_exit(fintek_exit);