psmouse-base.c 51 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * PS/2 mouse driver
  4. *
  5. * Copyright (c) 1999-2002 Vojtech Pavlik
  6. * Copyright (c) 2003-2004 Dmitry Torokhov
  7. */
  8. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  9. #define psmouse_fmt(fmt) fmt
  10. #include <linux/bitops.h>
  11. #include <linux/delay.h>
  12. #include <linux/module.h>
  13. #include <linux/slab.h>
  14. #include <linux/interrupt.h>
  15. #include <linux/input.h>
  16. #include <linux/serio.h>
  17. #include <linux/init.h>
  18. #include <linux/libps2.h>
  19. #include <linux/mutex.h>
  20. #include <linux/types.h>
  21. #include "psmouse.h"
  22. #include "synaptics.h"
  23. #include "logips2pp.h"
  24. #include "alps.h"
  25. #include "hgpk.h"
  26. #include "lifebook.h"
  27. #include "trackpoint.h"
  28. #include "touchkit_ps2.h"
  29. #include "elantech.h"
  30. #include "sentelic.h"
  31. #include "cypress_ps2.h"
  32. #include "focaltech.h"
  33. #include "vmmouse.h"
  34. #include "byd.h"
  35. #define DRIVER_DESC "PS/2 mouse driver"
  36. MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
  37. MODULE_DESCRIPTION(DRIVER_DESC);
  38. MODULE_LICENSE("GPL");
  39. static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
  40. static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
  41. static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
  42. static const struct kernel_param_ops param_ops_proto_abbrev = {
  43. .set = psmouse_set_maxproto,
  44. .get = psmouse_get_maxproto,
  45. };
  46. #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
  47. module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
  48. MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
  49. static unsigned int psmouse_resolution = 200;
  50. module_param_named(resolution, psmouse_resolution, uint, 0644);
  51. MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
  52. static unsigned int psmouse_rate = 100;
  53. module_param_named(rate, psmouse_rate, uint, 0644);
  54. MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
  55. static bool psmouse_smartscroll = true;
  56. module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
  57. MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
  58. static bool psmouse_a4tech_2wheels;
  59. module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644);
  60. MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default).");
  61. static unsigned int psmouse_resetafter = 5;
  62. module_param_named(resetafter, psmouse_resetafter, uint, 0644);
  63. MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
  64. static unsigned int psmouse_resync_time;
  65. module_param_named(resync_time, psmouse_resync_time, uint, 0644);
  66. MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
  67. PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
  68. NULL,
  69. psmouse_attr_show_protocol, psmouse_attr_set_protocol);
  70. PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
  71. (void *) offsetof(struct psmouse, rate),
  72. psmouse_show_int_attr, psmouse_attr_set_rate);
  73. PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
  74. (void *) offsetof(struct psmouse, resolution),
  75. psmouse_show_int_attr, psmouse_attr_set_resolution);
  76. PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
  77. (void *) offsetof(struct psmouse, resetafter),
  78. psmouse_show_int_attr, psmouse_set_int_attr);
  79. PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
  80. (void *) offsetof(struct psmouse, resync_time),
  81. psmouse_show_int_attr, psmouse_set_int_attr);
  82. static struct attribute *psmouse_attributes[] = {
  83. &psmouse_attr_protocol.dattr.attr,
  84. &psmouse_attr_rate.dattr.attr,
  85. &psmouse_attr_resolution.dattr.attr,
  86. &psmouse_attr_resetafter.dattr.attr,
  87. &psmouse_attr_resync_time.dattr.attr,
  88. NULL
  89. };
  90. static const struct attribute_group psmouse_attribute_group = {
  91. .attrs = psmouse_attributes,
  92. };
  93. /*
  94. * psmouse_mutex protects all operations changing state of mouse
  95. * (connecting, disconnecting, changing rate or resolution via
  96. * sysfs). We could use a per-device semaphore but since there
  97. * rarely more than one PS/2 mouse connected and since semaphore
  98. * is taken in "slow" paths it is not worth it.
  99. */
  100. static DEFINE_MUTEX(psmouse_mutex);
  101. static struct workqueue_struct *kpsmoused_wq;
  102. void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons)
  103. {
  104. input_report_key(dev, BTN_LEFT, buttons & BIT(0));
  105. input_report_key(dev, BTN_MIDDLE, buttons & BIT(2));
  106. input_report_key(dev, BTN_RIGHT, buttons & BIT(1));
  107. }
  108. void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet)
  109. {
  110. int x, y;
  111. x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
  112. y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0;
  113. input_report_rel(dev, REL_X, x);
  114. input_report_rel(dev, REL_Y, -y);
  115. }
  116. void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
  117. {
  118. psmouse_report_standard_buttons(dev, packet[0]);
  119. psmouse_report_standard_motion(dev, packet);
  120. }
  121. /*
  122. * psmouse_process_byte() analyzes the PS/2 data stream and reports
  123. * relevant events to the input module once full packet has arrived.
  124. */
  125. psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
  126. {
  127. struct input_dev *dev = psmouse->dev;
  128. u8 *packet = psmouse->packet;
  129. int wheel;
  130. if (psmouse->pktcnt < psmouse->pktsize)
  131. return PSMOUSE_GOOD_DATA;
  132. /* Full packet accumulated, process it */
  133. switch (psmouse->protocol->type) {
  134. case PSMOUSE_IMPS:
  135. /* IntelliMouse has scroll wheel */
  136. input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
  137. break;
  138. case PSMOUSE_IMEX:
  139. /* Scroll wheel and buttons on IntelliMouse Explorer */
  140. switch (packet[3] & 0xC0) {
  141. case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
  142. input_report_rel(dev, REL_WHEEL,
  143. -sign_extend32(packet[3], 5));
  144. break;
  145. case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
  146. input_report_rel(dev, REL_HWHEEL,
  147. -sign_extend32(packet[3], 5));
  148. break;
  149. case 0x00:
  150. case 0xC0:
  151. wheel = sign_extend32(packet[3], 3);
  152. /*
  153. * Some A4Tech mice have two scroll wheels, with first
  154. * one reporting +/-1 in the lower nibble, and second
  155. * one reporting +/-2.
  156. */
  157. if (psmouse_a4tech_2wheels && abs(wheel) > 1)
  158. input_report_rel(dev, REL_HWHEEL, wheel / 2);
  159. else
  160. input_report_rel(dev, REL_WHEEL, -wheel);
  161. input_report_key(dev, BTN_SIDE, packet[3] & BIT(4));
  162. input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5));
  163. break;
  164. }
  165. break;
  166. case PSMOUSE_GENPS:
  167. /* Report scroll buttons on NetMice */
  168. input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
  169. /* Extra buttons on Genius NewNet 3D */
  170. input_report_key(dev, BTN_SIDE, packet[0] & BIT(6));
  171. input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7));
  172. break;
  173. case PSMOUSE_THINKPS:
  174. /* Extra button on ThinkingMouse */
  175. input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3));
  176. /*
  177. * Without this bit of weirdness moving up gives wildly
  178. * high Y changes.
  179. */
  180. packet[1] |= (packet[0] & 0x40) << 1;
  181. break;
  182. case PSMOUSE_CORTRON:
  183. /*
  184. * Cortron PS2 Trackball reports SIDE button in the
  185. * 4th bit of the first byte.
  186. */
  187. input_report_key(dev, BTN_SIDE, packet[0] & BIT(3));
  188. packet[0] |= BIT(3);
  189. break;
  190. default:
  191. break;
  192. }
  193. /* Generic PS/2 Mouse */
  194. packet[0] |= psmouse->extra_buttons;
  195. psmouse_report_standard_packet(dev, packet);
  196. input_sync(dev);
  197. return PSMOUSE_FULL_PACKET;
  198. }
  199. void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
  200. unsigned long delay)
  201. {
  202. queue_delayed_work(kpsmoused_wq, work, delay);
  203. }
  204. /*
  205. * __psmouse_set_state() sets new psmouse state and resets all flags.
  206. */
  207. static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
  208. {
  209. psmouse->state = new_state;
  210. psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
  211. psmouse->ps2dev.flags = 0;
  212. psmouse->last = jiffies;
  213. }
  214. /*
  215. * psmouse_set_state() sets new psmouse state and resets all flags and
  216. * counters while holding serio lock so fighting with interrupt handler
  217. * is not a concern.
  218. */
  219. void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
  220. {
  221. serio_pause_rx(psmouse->ps2dev.serio);
  222. __psmouse_set_state(psmouse, new_state);
  223. serio_continue_rx(psmouse->ps2dev.serio);
  224. }
  225. /*
  226. * psmouse_handle_byte() processes one byte of the input data stream
  227. * by calling corresponding protocol handler.
  228. */
  229. static int psmouse_handle_byte(struct psmouse *psmouse)
  230. {
  231. psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
  232. switch (rc) {
  233. case PSMOUSE_BAD_DATA:
  234. if (psmouse->state == PSMOUSE_ACTIVATED) {
  235. psmouse_warn(psmouse,
  236. "%s at %s lost sync at byte %d\n",
  237. psmouse->name, psmouse->phys,
  238. psmouse->pktcnt);
  239. if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
  240. __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
  241. psmouse_notice(psmouse,
  242. "issuing reconnect request\n");
  243. serio_reconnect(psmouse->ps2dev.serio);
  244. return -EIO;
  245. }
  246. }
  247. psmouse->pktcnt = 0;
  248. break;
  249. case PSMOUSE_FULL_PACKET:
  250. psmouse->pktcnt = 0;
  251. if (psmouse->out_of_sync_cnt) {
  252. psmouse->out_of_sync_cnt = 0;
  253. psmouse_notice(psmouse,
  254. "%s at %s - driver resynced.\n",
  255. psmouse->name, psmouse->phys);
  256. }
  257. break;
  258. case PSMOUSE_GOOD_DATA:
  259. break;
  260. }
  261. return 0;
  262. }
  263. static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
  264. {
  265. switch (psmouse->oob_data_type) {
  266. case PSMOUSE_OOB_NONE:
  267. psmouse->oob_data_type = data;
  268. break;
  269. case PSMOUSE_OOB_EXTRA_BTNS:
  270. psmouse_report_standard_buttons(psmouse->dev, data);
  271. input_sync(psmouse->dev);
  272. psmouse->extra_buttons = data;
  273. psmouse->oob_data_type = PSMOUSE_OOB_NONE;
  274. break;
  275. default:
  276. psmouse_warn(psmouse,
  277. "unknown OOB_DATA type: 0x%02x\n",
  278. psmouse->oob_data_type);
  279. psmouse->oob_data_type = PSMOUSE_OOB_NONE;
  280. break;
  281. }
  282. }
  283. /*
  284. * psmouse_interrupt() handles incoming characters, either passing them
  285. * for normal processing or gathering them as command response.
  286. */
  287. static irqreturn_t psmouse_interrupt(struct serio *serio,
  288. u8 data, unsigned int flags)
  289. {
  290. struct psmouse *psmouse = serio_get_drvdata(serio);
  291. if (psmouse->state == PSMOUSE_IGNORE)
  292. goto out;
  293. if (unlikely((flags & SERIO_TIMEOUT) ||
  294. ((flags & SERIO_PARITY) &&
  295. !psmouse->protocol->ignore_parity))) {
  296. if (psmouse->state == PSMOUSE_ACTIVATED)
  297. psmouse_warn(psmouse,
  298. "bad data from KBC -%s%s\n",
  299. flags & SERIO_TIMEOUT ? " timeout" : "",
  300. flags & SERIO_PARITY ? " bad parity" : "");
  301. ps2_cmd_aborted(&psmouse->ps2dev);
  302. goto out;
  303. }
  304. if (flags & SERIO_OOB_DATA) {
  305. psmouse_handle_oob_data(psmouse, data);
  306. goto out;
  307. }
  308. if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
  309. if (ps2_handle_ack(&psmouse->ps2dev, data))
  310. goto out;
  311. if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
  312. if (ps2_handle_response(&psmouse->ps2dev, data))
  313. goto out;
  314. pm_wakeup_event(&serio->dev, 0);
  315. if (psmouse->state <= PSMOUSE_RESYNCING)
  316. goto out;
  317. if (psmouse->state == PSMOUSE_ACTIVATED &&
  318. psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
  319. psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
  320. psmouse->name, psmouse->phys, psmouse->pktcnt);
  321. psmouse->badbyte = psmouse->packet[0];
  322. __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
  323. psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
  324. goto out;
  325. }
  326. psmouse->packet[psmouse->pktcnt++] = data;
  327. /* Check if this is a new device announcement (0xAA 0x00) */
  328. if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
  329. if (psmouse->pktcnt == 1) {
  330. psmouse->last = jiffies;
  331. goto out;
  332. }
  333. if (psmouse->packet[1] == PSMOUSE_RET_ID ||
  334. (psmouse->protocol->type == PSMOUSE_HGPK &&
  335. psmouse->packet[1] == PSMOUSE_RET_BAT)) {
  336. __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
  337. serio_reconnect(serio);
  338. goto out;
  339. }
  340. /* Not a new device, try processing first byte normally */
  341. psmouse->pktcnt = 1;
  342. if (psmouse_handle_byte(psmouse))
  343. goto out;
  344. psmouse->packet[psmouse->pktcnt++] = data;
  345. }
  346. /*
  347. * See if we need to force resync because mouse was idle for
  348. * too long.
  349. */
  350. if (psmouse->state == PSMOUSE_ACTIVATED &&
  351. psmouse->pktcnt == 1 && psmouse->resync_time &&
  352. time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
  353. psmouse->badbyte = psmouse->packet[0];
  354. __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
  355. psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
  356. goto out;
  357. }
  358. psmouse->last = jiffies;
  359. psmouse_handle_byte(psmouse);
  360. out:
  361. return IRQ_HANDLED;
  362. }
  363. /*
  364. * psmouse_reset() resets the mouse into power-on state.
  365. */
  366. int psmouse_reset(struct psmouse *psmouse)
  367. {
  368. u8 param[2];
  369. int error;
  370. error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
  371. if (error)
  372. return error;
  373. if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
  374. return -EIO;
  375. return 0;
  376. }
  377. /*
  378. * Here we set the mouse resolution.
  379. */
  380. void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
  381. {
  382. static const u8 params[] = { 0, 1, 2, 2, 3 };
  383. u8 p;
  384. if (resolution == 0 || resolution > 200)
  385. resolution = 200;
  386. p = params[resolution / 50];
  387. ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
  388. psmouse->resolution = 25 << p;
  389. }
  390. /*
  391. * Here we set the mouse report rate.
  392. */
  393. static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
  394. {
  395. static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
  396. u8 r;
  397. int i = 0;
  398. while (rates[i] > rate)
  399. i++;
  400. r = rates[i];
  401. ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
  402. psmouse->rate = r;
  403. }
  404. /*
  405. * Here we set the mouse scaling.
  406. */
  407. static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
  408. {
  409. ps2_command(&psmouse->ps2dev, NULL,
  410. scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
  411. PSMOUSE_CMD_SETSCALE11);
  412. }
  413. /*
  414. * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
  415. */
  416. static int psmouse_poll(struct psmouse *psmouse)
  417. {
  418. return ps2_command(&psmouse->ps2dev, psmouse->packet,
  419. PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
  420. }
  421. static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
  422. {
  423. int i;
  424. for (i = 0; ids[i]; i++)
  425. if (!strcasecmp(id, ids[i]))
  426. return true;
  427. return false;
  428. }
  429. /*
  430. * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
  431. */
  432. bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
  433. {
  434. struct serio *serio = psmouse->ps2dev.serio;
  435. char *p, *fw_id_copy, *save_ptr;
  436. bool found = false;
  437. if (strncmp(serio->firmware_id, "PNP: ", 5))
  438. return false;
  439. fw_id_copy = kstrndup(&serio->firmware_id[5],
  440. sizeof(serio->firmware_id) - 5,
  441. GFP_KERNEL);
  442. if (!fw_id_copy)
  443. return false;
  444. save_ptr = fw_id_copy;
  445. while ((p = strsep(&fw_id_copy, " ")) != NULL) {
  446. if (psmouse_check_pnp_id(p, ids)) {
  447. found = true;
  448. break;
  449. }
  450. }
  451. kfree(save_ptr);
  452. return found;
  453. }
  454. /*
  455. * Genius NetMouse magic init.
  456. */
  457. static int genius_detect(struct psmouse *psmouse, bool set_properties)
  458. {
  459. struct ps2dev *ps2dev = &psmouse->ps2dev;
  460. u8 param[4];
  461. param[0] = 3;
  462. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  463. ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
  464. ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
  465. ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
  466. ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
  467. if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
  468. return -ENODEV;
  469. if (set_properties) {
  470. __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
  471. __set_bit(BTN_EXTRA, psmouse->dev->keybit);
  472. __set_bit(BTN_SIDE, psmouse->dev->keybit);
  473. __set_bit(REL_WHEEL, psmouse->dev->relbit);
  474. psmouse->vendor = "Genius";
  475. psmouse->name = "Mouse";
  476. psmouse->pktsize = 4;
  477. }
  478. return 0;
  479. }
  480. /*
  481. * IntelliMouse magic init.
  482. */
  483. static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
  484. {
  485. struct ps2dev *ps2dev = &psmouse->ps2dev;
  486. u8 param[2];
  487. param[0] = 200;
  488. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  489. param[0] = 100;
  490. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  491. param[0] = 80;
  492. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  493. ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
  494. if (param[0] != 3)
  495. return -ENODEV;
  496. if (set_properties) {
  497. __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
  498. __set_bit(REL_WHEEL, psmouse->dev->relbit);
  499. if (!psmouse->vendor)
  500. psmouse->vendor = "Generic";
  501. if (!psmouse->name)
  502. psmouse->name = "Wheel Mouse";
  503. psmouse->pktsize = 4;
  504. }
  505. return 0;
  506. }
  507. /*
  508. * Try IntelliMouse/Explorer magic init.
  509. */
  510. static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
  511. {
  512. struct ps2dev *ps2dev = &psmouse->ps2dev;
  513. u8 param[2];
  514. intellimouse_detect(psmouse, 0);
  515. param[0] = 200;
  516. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  517. param[0] = 200;
  518. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  519. param[0] = 80;
  520. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  521. ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
  522. if (param[0] != 4)
  523. return -ENODEV;
  524. /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
  525. param[0] = 200;
  526. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  527. param[0] = 80;
  528. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  529. param[0] = 40;
  530. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  531. if (set_properties) {
  532. __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
  533. __set_bit(REL_WHEEL, psmouse->dev->relbit);
  534. __set_bit(REL_HWHEEL, psmouse->dev->relbit);
  535. __set_bit(BTN_SIDE, psmouse->dev->keybit);
  536. __set_bit(BTN_EXTRA, psmouse->dev->keybit);
  537. if (!psmouse->vendor)
  538. psmouse->vendor = "Generic";
  539. if (!psmouse->name)
  540. psmouse->name = "Explorer Mouse";
  541. psmouse->pktsize = 4;
  542. }
  543. return 0;
  544. }
  545. /*
  546. * Kensington ThinkingMouse / ExpertMouse magic init.
  547. */
  548. static int thinking_detect(struct psmouse *psmouse, bool set_properties)
  549. {
  550. struct ps2dev *ps2dev = &psmouse->ps2dev;
  551. u8 param[2];
  552. static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
  553. int i;
  554. param[0] = 10;
  555. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  556. param[0] = 0;
  557. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  558. for (i = 0; i < ARRAY_SIZE(seq); i++) {
  559. param[0] = seq[i];
  560. ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
  561. }
  562. ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
  563. if (param[0] != 2)
  564. return -ENODEV;
  565. if (set_properties) {
  566. __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
  567. __set_bit(BTN_EXTRA, psmouse->dev->keybit);
  568. psmouse->vendor = "Kensington";
  569. psmouse->name = "ThinkingMouse";
  570. }
  571. return 0;
  572. }
  573. /*
  574. * Bare PS/2 protocol "detection". Always succeeds.
  575. */
  576. static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
  577. {
  578. if (set_properties) {
  579. if (!psmouse->vendor)
  580. psmouse->vendor = "Generic";
  581. if (!psmouse->name)
  582. psmouse->name = "Mouse";
  583. /*
  584. * We have no way of figuring true number of buttons so let's
  585. * assume that the device has 3.
  586. */
  587. input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
  588. }
  589. return 0;
  590. }
  591. /*
  592. * Cortron PS/2 protocol detection. There's no special way to detect it, so it
  593. * must be forced by sysfs protocol writing.
  594. */
  595. static int cortron_detect(struct psmouse *psmouse, bool set_properties)
  596. {
  597. if (set_properties) {
  598. psmouse->vendor = "Cortron";
  599. psmouse->name = "PS/2 Trackball";
  600. __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
  601. __set_bit(BTN_SIDE, psmouse->dev->keybit);
  602. }
  603. return 0;
  604. }
  605. static const struct psmouse_protocol psmouse_protocols[] = {
  606. {
  607. .type = PSMOUSE_PS2,
  608. .name = "PS/2",
  609. .alias = "bare",
  610. .maxproto = true,
  611. .ignore_parity = true,
  612. .detect = ps2bare_detect,
  613. .try_passthru = true,
  614. },
  615. #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
  616. {
  617. .type = PSMOUSE_PS2PP,
  618. .name = "PS2++",
  619. .alias = "logitech",
  620. .detect = ps2pp_detect,
  621. },
  622. #endif
  623. {
  624. .type = PSMOUSE_THINKPS,
  625. .name = "ThinkPS/2",
  626. .alias = "thinkps",
  627. .detect = thinking_detect,
  628. },
  629. #ifdef CONFIG_MOUSE_PS2_CYPRESS
  630. {
  631. .type = PSMOUSE_CYPRESS,
  632. .name = "CyPS/2",
  633. .alias = "cypress",
  634. .detect = cypress_detect,
  635. .init = cypress_init,
  636. },
  637. #endif
  638. {
  639. .type = PSMOUSE_GENPS,
  640. .name = "GenPS/2",
  641. .alias = "genius",
  642. .detect = genius_detect,
  643. },
  644. {
  645. .type = PSMOUSE_IMPS,
  646. .name = "ImPS/2",
  647. .alias = "imps",
  648. .maxproto = true,
  649. .ignore_parity = true,
  650. .detect = intellimouse_detect,
  651. .try_passthru = true,
  652. },
  653. {
  654. .type = PSMOUSE_IMEX,
  655. .name = "ImExPS/2",
  656. .alias = "exps",
  657. .maxproto = true,
  658. .ignore_parity = true,
  659. .detect = im_explorer_detect,
  660. .try_passthru = true,
  661. },
  662. #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
  663. {
  664. .type = PSMOUSE_SYNAPTICS,
  665. .name = "SynPS/2",
  666. .alias = "synaptics",
  667. .detect = synaptics_detect,
  668. .init = synaptics_init_absolute,
  669. },
  670. {
  671. .type = PSMOUSE_SYNAPTICS_RELATIVE,
  672. .name = "SynRelPS/2",
  673. .alias = "synaptics-relative",
  674. .detect = synaptics_detect,
  675. .init = synaptics_init_relative,
  676. },
  677. #endif
  678. #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
  679. {
  680. .type = PSMOUSE_SYNAPTICS_SMBUS,
  681. .name = "SynSMBus",
  682. .alias = "synaptics-smbus",
  683. .detect = synaptics_detect,
  684. .init = synaptics_init_smbus,
  685. .smbus_companion = true,
  686. },
  687. #endif
  688. #ifdef CONFIG_MOUSE_PS2_ALPS
  689. {
  690. .type = PSMOUSE_ALPS,
  691. .name = "AlpsPS/2",
  692. .alias = "alps",
  693. .detect = alps_detect,
  694. .init = alps_init,
  695. },
  696. #endif
  697. #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
  698. {
  699. .type = PSMOUSE_LIFEBOOK,
  700. .name = "LBPS/2",
  701. .alias = "lifebook",
  702. .detect = lifebook_detect,
  703. .init = lifebook_init,
  704. },
  705. #endif
  706. #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
  707. {
  708. .type = PSMOUSE_TRACKPOINT,
  709. .name = "TPPS/2",
  710. .alias = "trackpoint",
  711. .detect = trackpoint_detect,
  712. .try_passthru = true,
  713. },
  714. #endif
  715. #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
  716. {
  717. .type = PSMOUSE_TOUCHKIT_PS2,
  718. .name = "touchkitPS/2",
  719. .alias = "touchkit",
  720. .detect = touchkit_ps2_detect,
  721. },
  722. #endif
  723. #ifdef CONFIG_MOUSE_PS2_OLPC
  724. {
  725. .type = PSMOUSE_HGPK,
  726. .name = "OLPC HGPK",
  727. .alias = "hgpk",
  728. .detect = hgpk_detect,
  729. },
  730. #endif
  731. #ifdef CONFIG_MOUSE_PS2_ELANTECH
  732. {
  733. .type = PSMOUSE_ELANTECH,
  734. .name = "ETPS/2",
  735. .alias = "elantech",
  736. .detect = elantech_detect,
  737. .init = elantech_init_ps2,
  738. },
  739. #endif
  740. #ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
  741. {
  742. .type = PSMOUSE_ELANTECH_SMBUS,
  743. .name = "ETSMBus",
  744. .alias = "elantech-smbus",
  745. .detect = elantech_detect,
  746. .init = elantech_init_smbus,
  747. .smbus_companion = true,
  748. },
  749. #endif
  750. #ifdef CONFIG_MOUSE_PS2_SENTELIC
  751. {
  752. .type = PSMOUSE_FSP,
  753. .name = "FSPPS/2",
  754. .alias = "fsp",
  755. .detect = fsp_detect,
  756. .init = fsp_init,
  757. },
  758. #endif
  759. {
  760. .type = PSMOUSE_CORTRON,
  761. .name = "CortronPS/2",
  762. .alias = "cortps",
  763. .detect = cortron_detect,
  764. },
  765. #ifdef CONFIG_MOUSE_PS2_FOCALTECH
  766. {
  767. .type = PSMOUSE_FOCALTECH,
  768. .name = "FocalTechPS/2",
  769. .alias = "focaltech",
  770. .detect = focaltech_detect,
  771. .init = focaltech_init,
  772. },
  773. #endif
  774. #ifdef CONFIG_MOUSE_PS2_VMMOUSE
  775. {
  776. .type = PSMOUSE_VMMOUSE,
  777. .name = VMMOUSE_PSNAME,
  778. .alias = "vmmouse",
  779. .detect = vmmouse_detect,
  780. .init = vmmouse_init,
  781. },
  782. #endif
  783. #ifdef CONFIG_MOUSE_PS2_BYD
  784. {
  785. .type = PSMOUSE_BYD,
  786. .name = "BYDPS/2",
  787. .alias = "byd",
  788. .detect = byd_detect,
  789. .init = byd_init,
  790. },
  791. #endif
  792. {
  793. .type = PSMOUSE_AUTO,
  794. .name = "auto",
  795. .alias = "any",
  796. .maxproto = true,
  797. },
  798. };
  799. static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
  800. {
  801. int i;
  802. for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
  803. if (psmouse_protocols[i].type == type)
  804. return &psmouse_protocols[i];
  805. return NULL;
  806. }
  807. static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
  808. {
  809. const struct psmouse_protocol *proto;
  810. proto = __psmouse_protocol_by_type(type);
  811. if (proto)
  812. return proto;
  813. WARN_ON(1);
  814. return &psmouse_protocols[0];
  815. }
  816. static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
  817. {
  818. const struct psmouse_protocol *p;
  819. int i;
  820. for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
  821. p = &psmouse_protocols[i];
  822. if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
  823. (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
  824. return &psmouse_protocols[i];
  825. }
  826. return NULL;
  827. }
  828. /*
  829. * Apply default settings to the psmouse structure. Most of them will
  830. * be overridden by individual protocol initialization routines.
  831. */
  832. static void psmouse_apply_defaults(struct psmouse *psmouse)
  833. {
  834. struct input_dev *input_dev = psmouse->dev;
  835. bitmap_zero(input_dev->evbit, EV_CNT);
  836. bitmap_zero(input_dev->keybit, KEY_CNT);
  837. bitmap_zero(input_dev->relbit, REL_CNT);
  838. bitmap_zero(input_dev->absbit, ABS_CNT);
  839. bitmap_zero(input_dev->mscbit, MSC_CNT);
  840. input_set_capability(input_dev, EV_KEY, BTN_LEFT);
  841. input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
  842. input_set_capability(input_dev, EV_REL, REL_X);
  843. input_set_capability(input_dev, EV_REL, REL_Y);
  844. __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
  845. psmouse->protocol = &psmouse_protocols[0];
  846. psmouse->set_rate = psmouse_set_rate;
  847. psmouse->set_resolution = psmouse_set_resolution;
  848. psmouse->set_scale = psmouse_set_scale;
  849. psmouse->poll = psmouse_poll;
  850. psmouse->protocol_handler = psmouse_process_byte;
  851. psmouse->pktsize = 3;
  852. psmouse->reconnect = NULL;
  853. psmouse->fast_reconnect = NULL;
  854. psmouse->disconnect = NULL;
  855. psmouse->cleanup = NULL;
  856. psmouse->pt_activate = NULL;
  857. psmouse->pt_deactivate = NULL;
  858. }
  859. static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
  860. struct psmouse *psmouse, bool allow_passthrough,
  861. bool set_properties)
  862. {
  863. if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
  864. !allow_passthrough) {
  865. return false;
  866. }
  867. if (set_properties)
  868. psmouse_apply_defaults(psmouse);
  869. return detect(psmouse, set_properties) == 0;
  870. }
  871. static bool psmouse_try_protocol(struct psmouse *psmouse,
  872. enum psmouse_type type,
  873. unsigned int *max_proto,
  874. bool set_properties, bool init_allowed)
  875. {
  876. const struct psmouse_protocol *proto;
  877. proto = __psmouse_protocol_by_type(type);
  878. if (!proto)
  879. return false;
  880. if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru,
  881. set_properties))
  882. return false;
  883. if (set_properties && proto->init && init_allowed) {
  884. if (proto->init(psmouse) != 0) {
  885. /*
  886. * We detected device, but init failed. Adjust
  887. * max_proto so we only try standard protocols.
  888. */
  889. if (*max_proto > PSMOUSE_IMEX)
  890. *max_proto = PSMOUSE_IMEX;
  891. return false;
  892. }
  893. }
  894. return true;
  895. }
  896. /*
  897. * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
  898. * the mouse may have.
  899. */
  900. static int psmouse_extensions(struct psmouse *psmouse,
  901. unsigned int max_proto, bool set_properties)
  902. {
  903. bool synaptics_hardware = false;
  904. int ret;
  905. /*
  906. * Always check for focaltech, this is safe as it uses pnp-id
  907. * matching.
  908. */
  909. if (psmouse_do_detect(focaltech_detect,
  910. psmouse, false, set_properties)) {
  911. if (max_proto > PSMOUSE_IMEX &&
  912. IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
  913. (!set_properties || focaltech_init(psmouse) == 0)) {
  914. return PSMOUSE_FOCALTECH;
  915. }
  916. /*
  917. * Restrict psmouse_max_proto so that psmouse_initialize()
  918. * does not try to reset rate and resolution, because even
  919. * that upsets the device.
  920. * This also causes us to basically fall through to basic
  921. * protocol detection, where we fully reset the mouse,
  922. * and set it up as bare PS/2 protocol device.
  923. */
  924. psmouse_max_proto = max_proto = PSMOUSE_PS2;
  925. }
  926. /*
  927. * We always check for LifeBook because it does not disturb mouse
  928. * (it only checks DMI information).
  929. */
  930. if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
  931. set_properties, max_proto > PSMOUSE_IMEX))
  932. return PSMOUSE_LIFEBOOK;
  933. if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
  934. set_properties, max_proto > PSMOUSE_IMEX))
  935. return PSMOUSE_VMMOUSE;
  936. /*
  937. * Try Kensington ThinkingMouse (we try first, because Synaptics
  938. * probe upsets the ThinkingMouse).
  939. */
  940. if (max_proto > PSMOUSE_IMEX &&
  941. psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
  942. set_properties, true)) {
  943. return PSMOUSE_THINKPS;
  944. }
  945. /*
  946. * Try Synaptics TouchPad. Note that probing is done even if
  947. * Synaptics protocol support is disabled in config - we need to
  948. * know if it is Synaptics so we can reset it properly after
  949. * probing for IntelliMouse.
  950. */
  951. if (max_proto > PSMOUSE_PS2 &&
  952. psmouse_do_detect(synaptics_detect,
  953. psmouse, false, set_properties)) {
  954. synaptics_hardware = true;
  955. if (max_proto > PSMOUSE_IMEX) {
  956. /*
  957. * Try activating protocol, but check if support is
  958. * enabled first, since we try detecting Synaptics
  959. * even when protocol is disabled.
  960. */
  961. if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) ||
  962. IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) {
  963. if (!set_properties)
  964. return PSMOUSE_SYNAPTICS;
  965. ret = synaptics_init(psmouse);
  966. if (ret >= 0)
  967. return ret;
  968. }
  969. /*
  970. * Some Synaptics touchpads can emulate extended
  971. * protocols (like IMPS/2). Unfortunately
  972. * Logitech/Genius probes confuse some firmware
  973. * versions so we'll have to skip them.
  974. */
  975. max_proto = PSMOUSE_IMEX;
  976. }
  977. /*
  978. * Make sure that touchpad is in relative mode, gestures
  979. * (taps) are enabled.
  980. */
  981. synaptics_reset(psmouse);
  982. }
  983. /*
  984. * Try Cypress Trackpad. We must try it before Finger Sensing Pad
  985. * because Finger Sensing Pad probe upsets some modules of Cypress
  986. * Trackpads.
  987. */
  988. if (max_proto > PSMOUSE_IMEX &&
  989. psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
  990. set_properties, true)) {
  991. return PSMOUSE_CYPRESS;
  992. }
  993. /* Try ALPS TouchPad */
  994. if (max_proto > PSMOUSE_IMEX) {
  995. ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
  996. if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
  997. &max_proto, set_properties, true))
  998. return PSMOUSE_ALPS;
  999. }
  1000. /* Try OLPC HGPK touchpad */
  1001. if (max_proto > PSMOUSE_IMEX &&
  1002. psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
  1003. set_properties, true)) {
  1004. return PSMOUSE_HGPK;
  1005. }
  1006. /* Try Elantech touchpad */
  1007. if (max_proto > PSMOUSE_IMEX &&
  1008. psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
  1009. &max_proto, set_properties, false)) {
  1010. if (!set_properties)
  1011. return PSMOUSE_ELANTECH;
  1012. ret = elantech_init(psmouse);
  1013. if (ret >= 0)
  1014. return ret;
  1015. }
  1016. if (max_proto > PSMOUSE_IMEX) {
  1017. if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
  1018. &max_proto, set_properties, true))
  1019. return PSMOUSE_GENPS;
  1020. if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
  1021. &max_proto, set_properties, true))
  1022. return PSMOUSE_PS2PP;
  1023. if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
  1024. &max_proto, set_properties, true))
  1025. return PSMOUSE_TRACKPOINT;
  1026. if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
  1027. &max_proto, set_properties, true))
  1028. return PSMOUSE_TOUCHKIT_PS2;
  1029. }
  1030. /*
  1031. * Try Finger Sensing Pad. We do it here because its probe upsets
  1032. * Trackpoint devices (causing TP_READ_ID command to time out).
  1033. */
  1034. if (max_proto > PSMOUSE_IMEX &&
  1035. psmouse_try_protocol(psmouse, PSMOUSE_FSP,
  1036. &max_proto, set_properties, true)) {
  1037. return PSMOUSE_FSP;
  1038. }
  1039. /*
  1040. * Reset to defaults in case the device got confused by extended
  1041. * protocol probes. Note that we follow up with full reset because
  1042. * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
  1043. */
  1044. ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
  1045. psmouse_reset(psmouse);
  1046. if (max_proto >= PSMOUSE_IMEX &&
  1047. psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
  1048. &max_proto, set_properties, true)) {
  1049. return PSMOUSE_IMEX;
  1050. }
  1051. if (max_proto >= PSMOUSE_IMPS &&
  1052. psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
  1053. &max_proto, set_properties, true)) {
  1054. return PSMOUSE_IMPS;
  1055. }
  1056. /*
  1057. * Okay, all failed, we have a standard mouse here. The number of
  1058. * the buttons is still a question, though. We assume 3.
  1059. */
  1060. psmouse_try_protocol(psmouse, PSMOUSE_PS2,
  1061. &max_proto, set_properties, true);
  1062. if (synaptics_hardware) {
  1063. /*
  1064. * We detected Synaptics hardware but it did not respond to
  1065. * IMPS/2 probes. We need to reset the touchpad because if
  1066. * there is a track point on the pass through port it could
  1067. * get disabled while probing for protocol extensions.
  1068. */
  1069. psmouse_reset(psmouse);
  1070. }
  1071. return PSMOUSE_PS2;
  1072. }
  1073. /*
  1074. * psmouse_probe() probes for a PS/2 mouse.
  1075. */
  1076. static int psmouse_probe(struct psmouse *psmouse)
  1077. {
  1078. struct ps2dev *ps2dev = &psmouse->ps2dev;
  1079. u8 param[2];
  1080. int error;
  1081. /*
  1082. * First, we check if it's a mouse. It should send 0x00 or 0x03 in
  1083. * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
  1084. * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
  1085. * subsequent ID queries, probably due to a firmware bug.
  1086. */
  1087. param[0] = 0xa5;
  1088. error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
  1089. if (error)
  1090. return error;
  1091. if (param[0] != 0x00 && param[0] != 0x03 &&
  1092. param[0] != 0x04 && param[0] != 0xff)
  1093. return -ENODEV;
  1094. /*
  1095. * Then we reset and disable the mouse so that it doesn't generate
  1096. * events.
  1097. */
  1098. error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
  1099. if (error)
  1100. psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
  1101. ps2dev->serio->phys, error);
  1102. return 0;
  1103. }
  1104. /*
  1105. * psmouse_initialize() initializes the mouse to a sane state.
  1106. */
  1107. static void psmouse_initialize(struct psmouse *psmouse)
  1108. {
  1109. /*
  1110. * We set the mouse report rate, resolution and scaling.
  1111. */
  1112. if (psmouse_max_proto != PSMOUSE_PS2) {
  1113. psmouse->set_rate(psmouse, psmouse->rate);
  1114. psmouse->set_resolution(psmouse, psmouse->resolution);
  1115. psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
  1116. }
  1117. }
  1118. /*
  1119. * psmouse_activate() enables the mouse so that we get motion reports from it.
  1120. */
  1121. int psmouse_activate(struct psmouse *psmouse)
  1122. {
  1123. if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
  1124. psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
  1125. psmouse->ps2dev.serio->phys);
  1126. return -1;
  1127. }
  1128. psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
  1129. return 0;
  1130. }
  1131. /*
  1132. * psmouse_deactivate() puts the mouse into poll mode so that we don't get
  1133. * motion reports from it unless we explicitly request it.
  1134. */
  1135. int psmouse_deactivate(struct psmouse *psmouse)
  1136. {
  1137. int error;
  1138. error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
  1139. if (error) {
  1140. psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
  1141. psmouse->ps2dev.serio->phys, error);
  1142. return error;
  1143. }
  1144. psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  1145. return 0;
  1146. }
  1147. /*
  1148. * psmouse_resync() attempts to re-validate current protocol.
  1149. */
  1150. static void psmouse_resync(struct work_struct *work)
  1151. {
  1152. struct psmouse *parent = NULL, *psmouse =
  1153. container_of(work, struct psmouse, resync_work.work);
  1154. struct serio *serio = psmouse->ps2dev.serio;
  1155. psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
  1156. bool failed = false, enabled = false;
  1157. int i;
  1158. mutex_lock(&psmouse_mutex);
  1159. if (psmouse->state != PSMOUSE_RESYNCING)
  1160. goto out;
  1161. if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
  1162. parent = serio_get_drvdata(serio->parent);
  1163. psmouse_deactivate(parent);
  1164. }
  1165. /*
  1166. * Some mice don't ACK commands sent while they are in the middle of
  1167. * transmitting motion packet. To avoid delay we use ps2_sendbyte()
  1168. * instead of ps2_command() which would wait for 200ms for an ACK
  1169. * that may never come.
  1170. * As an additional quirk ALPS touchpads may not only forget to ACK
  1171. * disable command but will stop reporting taps, so if we see that
  1172. * mouse at least once ACKs disable we will do full reconnect if ACK
  1173. * is missing.
  1174. */
  1175. psmouse->num_resyncs++;
  1176. if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
  1177. if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
  1178. failed = true;
  1179. } else
  1180. psmouse->acks_disable_command = true;
  1181. /*
  1182. * Poll the mouse. If it was reset the packet will be shorter than
  1183. * psmouse->pktsize and ps2_command will fail. We do not expect and
  1184. * do not handle scenario when mouse "upgrades" its protocol while
  1185. * disconnected since it would require additional delay. If we ever
  1186. * see a mouse that does it we'll adjust the code.
  1187. */
  1188. if (!failed) {
  1189. if (psmouse->poll(psmouse))
  1190. failed = true;
  1191. else {
  1192. psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  1193. for (i = 0; i < psmouse->pktsize; i++) {
  1194. psmouse->pktcnt++;
  1195. rc = psmouse->protocol_handler(psmouse);
  1196. if (rc != PSMOUSE_GOOD_DATA)
  1197. break;
  1198. }
  1199. if (rc != PSMOUSE_FULL_PACKET)
  1200. failed = true;
  1201. psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
  1202. }
  1203. }
  1204. /*
  1205. * Now try to enable mouse. We try to do that even if poll failed
  1206. * and also repeat our attempts 5 times, otherwise we may be left
  1207. * out with disabled mouse.
  1208. */
  1209. for (i = 0; i < 5; i++) {
  1210. if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
  1211. enabled = true;
  1212. break;
  1213. }
  1214. msleep(200);
  1215. }
  1216. if (!enabled) {
  1217. psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
  1218. psmouse->ps2dev.serio->phys);
  1219. failed = true;
  1220. }
  1221. if (failed) {
  1222. psmouse_set_state(psmouse, PSMOUSE_IGNORE);
  1223. psmouse_info(psmouse,
  1224. "resync failed, issuing reconnect request\n");
  1225. serio_reconnect(serio);
  1226. } else
  1227. psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
  1228. if (parent)
  1229. psmouse_activate(parent);
  1230. out:
  1231. mutex_unlock(&psmouse_mutex);
  1232. }
  1233. /*
  1234. * psmouse_cleanup() resets the mouse into power-on state.
  1235. */
  1236. static void psmouse_cleanup(struct serio *serio)
  1237. {
  1238. struct psmouse *psmouse = serio_get_drvdata(serio);
  1239. struct psmouse *parent = NULL;
  1240. mutex_lock(&psmouse_mutex);
  1241. if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
  1242. parent = serio_get_drvdata(serio->parent);
  1243. psmouse_deactivate(parent);
  1244. }
  1245. psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
  1246. /*
  1247. * Disable stream mode so cleanup routine can proceed undisturbed.
  1248. */
  1249. if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
  1250. psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
  1251. psmouse->ps2dev.serio->phys);
  1252. if (psmouse->cleanup)
  1253. psmouse->cleanup(psmouse);
  1254. /*
  1255. * Reset the mouse to defaults (bare PS/2 protocol).
  1256. */
  1257. ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
  1258. /*
  1259. * Some boxes, such as HP nx7400, get terribly confused if mouse
  1260. * is not fully enabled before suspending/shutting down.
  1261. */
  1262. ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
  1263. if (parent) {
  1264. if (parent->pt_deactivate)
  1265. parent->pt_deactivate(parent);
  1266. psmouse_activate(parent);
  1267. }
  1268. mutex_unlock(&psmouse_mutex);
  1269. }
  1270. /*
  1271. * psmouse_disconnect() closes and frees.
  1272. */
  1273. static void psmouse_disconnect(struct serio *serio)
  1274. {
  1275. struct psmouse *psmouse = serio_get_drvdata(serio);
  1276. struct psmouse *parent = NULL;
  1277. sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
  1278. mutex_lock(&psmouse_mutex);
  1279. psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  1280. /* make sure we don't have a resync in progress */
  1281. mutex_unlock(&psmouse_mutex);
  1282. flush_workqueue(kpsmoused_wq);
  1283. mutex_lock(&psmouse_mutex);
  1284. if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
  1285. parent = serio_get_drvdata(serio->parent);
  1286. psmouse_deactivate(parent);
  1287. }
  1288. if (psmouse->disconnect)
  1289. psmouse->disconnect(psmouse);
  1290. if (parent && parent->pt_deactivate)
  1291. parent->pt_deactivate(parent);
  1292. psmouse_set_state(psmouse, PSMOUSE_IGNORE);
  1293. serio_close(serio);
  1294. serio_set_drvdata(serio, NULL);
  1295. if (psmouse->dev)
  1296. input_unregister_device(psmouse->dev);
  1297. kfree(psmouse);
  1298. if (parent)
  1299. psmouse_activate(parent);
  1300. mutex_unlock(&psmouse_mutex);
  1301. }
  1302. static int psmouse_switch_protocol(struct psmouse *psmouse,
  1303. const struct psmouse_protocol *proto)
  1304. {
  1305. const struct psmouse_protocol *selected_proto;
  1306. struct input_dev *input_dev = psmouse->dev;
  1307. enum psmouse_type type;
  1308. input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
  1309. if (proto && (proto->detect || proto->init)) {
  1310. psmouse_apply_defaults(psmouse);
  1311. if (proto->detect && proto->detect(psmouse, true) < 0)
  1312. return -1;
  1313. if (proto->init && proto->init(psmouse) < 0)
  1314. return -1;
  1315. selected_proto = proto;
  1316. } else {
  1317. type = psmouse_extensions(psmouse, psmouse_max_proto, true);
  1318. selected_proto = psmouse_protocol_by_type(type);
  1319. }
  1320. psmouse->protocol = selected_proto;
  1321. /*
  1322. * If mouse's packet size is 3 there is no point in polling the
  1323. * device in hopes to detect protocol reset - we won't get less
  1324. * than 3 bytes response anyhow.
  1325. */
  1326. if (psmouse->pktsize == 3)
  1327. psmouse->resync_time = 0;
  1328. /*
  1329. * Some smart KVMs fake response to POLL command returning just
  1330. * 3 bytes and messing up our resync logic, so if initial poll
  1331. * fails we won't try polling the device anymore. Hopefully
  1332. * such KVM will maintain initially selected protocol.
  1333. */
  1334. if (psmouse->resync_time && psmouse->poll(psmouse))
  1335. psmouse->resync_time = 0;
  1336. snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
  1337. selected_proto->name, psmouse->vendor, psmouse->name);
  1338. input_dev->name = psmouse->devname;
  1339. input_dev->phys = psmouse->phys;
  1340. input_dev->id.bustype = BUS_I8042;
  1341. input_dev->id.vendor = 0x0002;
  1342. input_dev->id.product = psmouse->protocol->type;
  1343. input_dev->id.version = psmouse->model;
  1344. return 0;
  1345. }
  1346. /*
  1347. * psmouse_connect() is a callback from the serio module when
  1348. * an unhandled serio port is found.
  1349. */
  1350. static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
  1351. {
  1352. struct psmouse *psmouse, *parent = NULL;
  1353. struct input_dev *input_dev;
  1354. int retval = 0, error = -ENOMEM;
  1355. mutex_lock(&psmouse_mutex);
  1356. /*
  1357. * If this is a pass-through port deactivate parent so the device
  1358. * connected to this port can be successfully identified
  1359. */
  1360. if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
  1361. parent = serio_get_drvdata(serio->parent);
  1362. psmouse_deactivate(parent);
  1363. }
  1364. psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
  1365. input_dev = input_allocate_device();
  1366. if (!psmouse || !input_dev)
  1367. goto err_free;
  1368. ps2_init(&psmouse->ps2dev, serio);
  1369. INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
  1370. psmouse->dev = input_dev;
  1371. snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
  1372. psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
  1373. serio_set_drvdata(serio, psmouse);
  1374. error = serio_open(serio, drv);
  1375. if (error)
  1376. goto err_clear_drvdata;
  1377. /* give PT device some time to settle down before probing */
  1378. if (serio->id.type == SERIO_PS_PSTHRU)
  1379. usleep_range(10000, 15000);
  1380. if (psmouse_probe(psmouse) < 0) {
  1381. error = -ENODEV;
  1382. goto err_close_serio;
  1383. }
  1384. psmouse->rate = psmouse_rate;
  1385. psmouse->resolution = psmouse_resolution;
  1386. psmouse->resetafter = psmouse_resetafter;
  1387. psmouse->resync_time = parent ? 0 : psmouse_resync_time;
  1388. psmouse->smartscroll = psmouse_smartscroll;
  1389. psmouse_switch_protocol(psmouse, NULL);
  1390. if (!psmouse->protocol->smbus_companion) {
  1391. psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  1392. psmouse_initialize(psmouse);
  1393. error = input_register_device(input_dev);
  1394. if (error)
  1395. goto err_protocol_disconnect;
  1396. } else {
  1397. /* Smbus companion will be reporting events, not us. */
  1398. input_free_device(input_dev);
  1399. psmouse->dev = input_dev = NULL;
  1400. }
  1401. if (parent && parent->pt_activate)
  1402. parent->pt_activate(parent);
  1403. error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
  1404. if (error)
  1405. goto err_pt_deactivate;
  1406. /*
  1407. * PS/2 devices having SMBus companions should stay disabled
  1408. * on PS/2 side, in order to have SMBus part operable.
  1409. */
  1410. if (!psmouse->protocol->smbus_companion)
  1411. psmouse_activate(psmouse);
  1412. out:
  1413. /* If this is a pass-through port the parent needs to be re-activated */
  1414. if (parent)
  1415. psmouse_activate(parent);
  1416. mutex_unlock(&psmouse_mutex);
  1417. return retval;
  1418. err_pt_deactivate:
  1419. if (parent && parent->pt_deactivate)
  1420. parent->pt_deactivate(parent);
  1421. if (input_dev) {
  1422. input_unregister_device(input_dev);
  1423. input_dev = NULL; /* so we don't try to free it below */
  1424. }
  1425. err_protocol_disconnect:
  1426. if (psmouse->disconnect)
  1427. psmouse->disconnect(psmouse);
  1428. psmouse_set_state(psmouse, PSMOUSE_IGNORE);
  1429. err_close_serio:
  1430. serio_close(serio);
  1431. err_clear_drvdata:
  1432. serio_set_drvdata(serio, NULL);
  1433. err_free:
  1434. input_free_device(input_dev);
  1435. kfree(psmouse);
  1436. retval = error;
  1437. goto out;
  1438. }
  1439. static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
  1440. {
  1441. struct psmouse *psmouse = serio_get_drvdata(serio);
  1442. struct psmouse *parent = NULL;
  1443. int (*reconnect_handler)(struct psmouse *);
  1444. enum psmouse_type type;
  1445. int rc = -1;
  1446. mutex_lock(&psmouse_mutex);
  1447. if (fast_reconnect) {
  1448. reconnect_handler = psmouse->fast_reconnect;
  1449. if (!reconnect_handler) {
  1450. rc = -ENOENT;
  1451. goto out_unlock;
  1452. }
  1453. } else {
  1454. reconnect_handler = psmouse->reconnect;
  1455. }
  1456. if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
  1457. parent = serio_get_drvdata(serio->parent);
  1458. psmouse_deactivate(parent);
  1459. }
  1460. psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
  1461. if (reconnect_handler) {
  1462. if (reconnect_handler(psmouse))
  1463. goto out;
  1464. } else {
  1465. psmouse_reset(psmouse);
  1466. if (psmouse_probe(psmouse) < 0)
  1467. goto out;
  1468. type = psmouse_extensions(psmouse, psmouse_max_proto, false);
  1469. if (psmouse->protocol->type != type)
  1470. goto out;
  1471. }
  1472. /*
  1473. * OK, the device type (and capabilities) match the old one,
  1474. * we can continue using it, complete initialization
  1475. */
  1476. if (!psmouse->protocol->smbus_companion) {
  1477. psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  1478. psmouse_initialize(psmouse);
  1479. }
  1480. if (parent && parent->pt_activate)
  1481. parent->pt_activate(parent);
  1482. /*
  1483. * PS/2 devices having SMBus companions should stay disabled
  1484. * on PS/2 side, in order to have SMBus part operable.
  1485. */
  1486. if (!psmouse->protocol->smbus_companion)
  1487. psmouse_activate(psmouse);
  1488. rc = 0;
  1489. out:
  1490. /* If this is a pass-through port the parent waits to be activated */
  1491. if (parent)
  1492. psmouse_activate(parent);
  1493. out_unlock:
  1494. mutex_unlock(&psmouse_mutex);
  1495. return rc;
  1496. }
  1497. static int psmouse_reconnect(struct serio *serio)
  1498. {
  1499. return __psmouse_reconnect(serio, false);
  1500. }
  1501. static int psmouse_fast_reconnect(struct serio *serio)
  1502. {
  1503. return __psmouse_reconnect(serio, true);
  1504. }
  1505. static struct serio_device_id psmouse_serio_ids[] = {
  1506. {
  1507. .type = SERIO_8042,
  1508. .proto = SERIO_ANY,
  1509. .id = SERIO_ANY,
  1510. .extra = SERIO_ANY,
  1511. },
  1512. {
  1513. .type = SERIO_PS_PSTHRU,
  1514. .proto = SERIO_ANY,
  1515. .id = SERIO_ANY,
  1516. .extra = SERIO_ANY,
  1517. },
  1518. { 0 }
  1519. };
  1520. MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
  1521. static struct serio_driver psmouse_drv = {
  1522. .driver = {
  1523. .name = "psmouse",
  1524. },
  1525. .description = DRIVER_DESC,
  1526. .id_table = psmouse_serio_ids,
  1527. .interrupt = psmouse_interrupt,
  1528. .connect = psmouse_connect,
  1529. .reconnect = psmouse_reconnect,
  1530. .fast_reconnect = psmouse_fast_reconnect,
  1531. .disconnect = psmouse_disconnect,
  1532. .cleanup = psmouse_cleanup,
  1533. };
  1534. ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
  1535. char *buf)
  1536. {
  1537. struct serio *serio = to_serio_port(dev);
  1538. struct psmouse_attribute *attr = to_psmouse_attr(devattr);
  1539. struct psmouse *psmouse = serio_get_drvdata(serio);
  1540. if (psmouse->protocol->smbus_companion &&
  1541. devattr != &psmouse_attr_protocol.dattr)
  1542. return -ENOENT;
  1543. return attr->show(psmouse, attr->data, buf);
  1544. }
  1545. ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
  1546. const char *buf, size_t count)
  1547. {
  1548. struct serio *serio = to_serio_port(dev);
  1549. struct psmouse_attribute *attr = to_psmouse_attr(devattr);
  1550. struct psmouse *psmouse, *parent = NULL;
  1551. int retval;
  1552. retval = mutex_lock_interruptible(&psmouse_mutex);
  1553. if (retval)
  1554. goto out;
  1555. psmouse = serio_get_drvdata(serio);
  1556. if (psmouse->protocol->smbus_companion &&
  1557. devattr != &psmouse_attr_protocol.dattr) {
  1558. retval = -ENOENT;
  1559. goto out_unlock;
  1560. }
  1561. if (attr->protect) {
  1562. if (psmouse->state == PSMOUSE_IGNORE) {
  1563. retval = -ENODEV;
  1564. goto out_unlock;
  1565. }
  1566. if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
  1567. parent = serio_get_drvdata(serio->parent);
  1568. psmouse_deactivate(parent);
  1569. }
  1570. if (!psmouse->protocol->smbus_companion)
  1571. psmouse_deactivate(psmouse);
  1572. }
  1573. retval = attr->set(psmouse, attr->data, buf, count);
  1574. if (attr->protect) {
  1575. if (retval != -ENODEV && !psmouse->protocol->smbus_companion)
  1576. psmouse_activate(psmouse);
  1577. if (parent)
  1578. psmouse_activate(parent);
  1579. }
  1580. out_unlock:
  1581. mutex_unlock(&psmouse_mutex);
  1582. out:
  1583. return retval;
  1584. }
  1585. static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
  1586. {
  1587. unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
  1588. return sprintf(buf, "%u\n", *field);
  1589. }
  1590. static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
  1591. {
  1592. unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
  1593. unsigned int value;
  1594. int err;
  1595. err = kstrtouint(buf, 10, &value);
  1596. if (err)
  1597. return err;
  1598. *field = value;
  1599. return count;
  1600. }
  1601. static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
  1602. {
  1603. return sprintf(buf, "%s\n", psmouse->protocol->name);
  1604. }
  1605. static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
  1606. {
  1607. struct serio *serio = psmouse->ps2dev.serio;
  1608. struct psmouse *parent = NULL;
  1609. struct input_dev *old_dev, *new_dev;
  1610. const struct psmouse_protocol *proto, *old_proto;
  1611. int error;
  1612. int retry = 0;
  1613. proto = psmouse_protocol_by_name(buf, count);
  1614. if (!proto)
  1615. return -EINVAL;
  1616. if (psmouse->protocol == proto)
  1617. return count;
  1618. new_dev = input_allocate_device();
  1619. if (!new_dev)
  1620. return -ENOMEM;
  1621. while (!list_empty(&serio->children)) {
  1622. if (++retry > 3) {
  1623. psmouse_warn(psmouse,
  1624. "failed to destroy children ports, protocol change aborted.\n");
  1625. input_free_device(new_dev);
  1626. return -EIO;
  1627. }
  1628. mutex_unlock(&psmouse_mutex);
  1629. serio_unregister_child_port(serio);
  1630. mutex_lock(&psmouse_mutex);
  1631. if (serio->drv != &psmouse_drv) {
  1632. input_free_device(new_dev);
  1633. return -ENODEV;
  1634. }
  1635. if (psmouse->protocol == proto) {
  1636. input_free_device(new_dev);
  1637. return count; /* switched by other thread */
  1638. }
  1639. }
  1640. if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
  1641. parent = serio_get_drvdata(serio->parent);
  1642. if (parent->pt_deactivate)
  1643. parent->pt_deactivate(parent);
  1644. }
  1645. old_dev = psmouse->dev;
  1646. old_proto = psmouse->protocol;
  1647. if (psmouse->disconnect)
  1648. psmouse->disconnect(psmouse);
  1649. psmouse_set_state(psmouse, PSMOUSE_IGNORE);
  1650. psmouse->dev = new_dev;
  1651. psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
  1652. if (psmouse_switch_protocol(psmouse, proto) < 0) {
  1653. psmouse_reset(psmouse);
  1654. /* default to PSMOUSE_PS2 */
  1655. psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
  1656. }
  1657. psmouse_initialize(psmouse);
  1658. psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  1659. if (psmouse->protocol->smbus_companion) {
  1660. input_free_device(psmouse->dev);
  1661. psmouse->dev = NULL;
  1662. } else {
  1663. error = input_register_device(psmouse->dev);
  1664. if (error) {
  1665. if (psmouse->disconnect)
  1666. psmouse->disconnect(psmouse);
  1667. psmouse_set_state(psmouse, PSMOUSE_IGNORE);
  1668. input_free_device(new_dev);
  1669. psmouse->dev = old_dev;
  1670. psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
  1671. psmouse_switch_protocol(psmouse, old_proto);
  1672. psmouse_initialize(psmouse);
  1673. psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  1674. return error;
  1675. }
  1676. }
  1677. if (old_dev)
  1678. input_unregister_device(old_dev);
  1679. if (parent && parent->pt_activate)
  1680. parent->pt_activate(parent);
  1681. return count;
  1682. }
  1683. static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
  1684. {
  1685. unsigned int value;
  1686. int err;
  1687. err = kstrtouint(buf, 10, &value);
  1688. if (err)
  1689. return err;
  1690. psmouse->set_rate(psmouse, value);
  1691. return count;
  1692. }
  1693. static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
  1694. {
  1695. unsigned int value;
  1696. int err;
  1697. err = kstrtouint(buf, 10, &value);
  1698. if (err)
  1699. return err;
  1700. psmouse->set_resolution(psmouse, value);
  1701. return count;
  1702. }
  1703. static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
  1704. {
  1705. const struct psmouse_protocol *proto;
  1706. if (!val)
  1707. return -EINVAL;
  1708. proto = psmouse_protocol_by_name(val, strlen(val));
  1709. if (!proto || !proto->maxproto)
  1710. return -EINVAL;
  1711. *((unsigned int *)kp->arg) = proto->type;
  1712. return 0;
  1713. }
  1714. static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
  1715. {
  1716. int type = *((unsigned int *)kp->arg);
  1717. return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
  1718. }
  1719. static int __init psmouse_init(void)
  1720. {
  1721. int err;
  1722. lifebook_module_init();
  1723. synaptics_module_init();
  1724. hgpk_module_init();
  1725. err = psmouse_smbus_module_init();
  1726. if (err)
  1727. return err;
  1728. kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
  1729. if (!kpsmoused_wq) {
  1730. pr_err("failed to create kpsmoused workqueue\n");
  1731. err = -ENOMEM;
  1732. goto err_smbus_exit;
  1733. }
  1734. err = serio_register_driver(&psmouse_drv);
  1735. if (err)
  1736. goto err_destroy_wq;
  1737. return 0;
  1738. err_destroy_wq:
  1739. destroy_workqueue(kpsmoused_wq);
  1740. err_smbus_exit:
  1741. psmouse_smbus_module_exit();
  1742. return err;
  1743. }
  1744. static void __exit psmouse_exit(void)
  1745. {
  1746. serio_unregister_driver(&psmouse_drv);
  1747. destroy_workqueue(kpsmoused_wq);
  1748. psmouse_smbus_module_exit();
  1749. }
  1750. module_init(psmouse_init);
  1751. module_exit(psmouse_exit);