ds.c 30 KB

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  1. /*
  2. * ds.c -- 16-bit PCMCIA core support
  3. *
  4. * This program is free software; you can redistribute it and/or modify
  5. * it under the terms of the GNU General Public License version 2 as
  6. * published by the Free Software Foundation.
  7. *
  8. * The initial developer of the original code is David A. Hinds
  9. * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
  10. * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
  11. *
  12. * (C) 1999 David A. Hinds
  13. * (C) 2003 - 2005 Dominik Brodowski
  14. */
  15. #include <linux/config.h>
  16. #include <linux/kernel.h>
  17. #include <linux/module.h>
  18. #include <linux/init.h>
  19. #include <linux/errno.h>
  20. #include <linux/list.h>
  21. #include <linux/delay.h>
  22. #include <linux/workqueue.h>
  23. #include <linux/crc32.h>
  24. #include <linux/firmware.h>
  25. #define IN_CARD_SERVICES
  26. #include <pcmcia/cs_types.h>
  27. #include <pcmcia/cs.h>
  28. #include <pcmcia/cistpl.h>
  29. #include <pcmcia/ds.h>
  30. #include <pcmcia/ss.h>
  31. #include "cs_internal.h"
  32. #include "ds_internal.h"
  33. /*====================================================================*/
  34. /* Module parameters */
  35. MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  36. MODULE_DESCRIPTION("PCMCIA Driver Services");
  37. MODULE_LICENSE("GPL");
  38. #ifdef DEBUG
  39. int ds_pc_debug;
  40. module_param_named(pc_debug, ds_pc_debug, int, 0644);
  41. #define ds_dbg(lvl, fmt, arg...) do { \
  42. if (ds_pc_debug > (lvl)) \
  43. printk(KERN_DEBUG "ds: " fmt , ## arg); \
  44. } while (0)
  45. #else
  46. #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  47. #endif
  48. spinlock_t pcmcia_dev_list_lock;
  49. /*====================================================================*/
  50. /* code which was in cs.c before */
  51. /* String tables for error messages */
  52. typedef struct lookup_t {
  53. int key;
  54. char *msg;
  55. } lookup_t;
  56. static const lookup_t error_table[] = {
  57. { CS_SUCCESS, "Operation succeeded" },
  58. { CS_BAD_ADAPTER, "Bad adapter" },
  59. { CS_BAD_ATTRIBUTE, "Bad attribute", },
  60. { CS_BAD_BASE, "Bad base address" },
  61. { CS_BAD_EDC, "Bad EDC" },
  62. { CS_BAD_IRQ, "Bad IRQ" },
  63. { CS_BAD_OFFSET, "Bad offset" },
  64. { CS_BAD_PAGE, "Bad page number" },
  65. { CS_READ_FAILURE, "Read failure" },
  66. { CS_BAD_SIZE, "Bad size" },
  67. { CS_BAD_SOCKET, "Bad socket" },
  68. { CS_BAD_TYPE, "Bad type" },
  69. { CS_BAD_VCC, "Bad Vcc" },
  70. { CS_BAD_VPP, "Bad Vpp" },
  71. { CS_BAD_WINDOW, "Bad window" },
  72. { CS_WRITE_FAILURE, "Write failure" },
  73. { CS_NO_CARD, "No card present" },
  74. { CS_UNSUPPORTED_FUNCTION, "Usupported function" },
  75. { CS_UNSUPPORTED_MODE, "Unsupported mode" },
  76. { CS_BAD_SPEED, "Bad speed" },
  77. { CS_BUSY, "Resource busy" },
  78. { CS_GENERAL_FAILURE, "General failure" },
  79. { CS_WRITE_PROTECTED, "Write protected" },
  80. { CS_BAD_ARG_LENGTH, "Bad argument length" },
  81. { CS_BAD_ARGS, "Bad arguments" },
  82. { CS_CONFIGURATION_LOCKED, "Configuration locked" },
  83. { CS_IN_USE, "Resource in use" },
  84. { CS_NO_MORE_ITEMS, "No more items" },
  85. { CS_OUT_OF_RESOURCE, "Out of resource" },
  86. { CS_BAD_HANDLE, "Bad handle" },
  87. { CS_BAD_TUPLE, "Bad CIS tuple" }
  88. };
  89. static const lookup_t service_table[] = {
  90. { AccessConfigurationRegister, "AccessConfigurationRegister" },
  91. { AddSocketServices, "AddSocketServices" },
  92. { AdjustResourceInfo, "AdjustResourceInfo" },
  93. { CheckEraseQueue, "CheckEraseQueue" },
  94. { CloseMemory, "CloseMemory" },
  95. { DeregisterClient, "DeregisterClient" },
  96. { DeregisterEraseQueue, "DeregisterEraseQueue" },
  97. { GetCardServicesInfo, "GetCardServicesInfo" },
  98. { GetClientInfo, "GetClientInfo" },
  99. { GetConfigurationInfo, "GetConfigurationInfo" },
  100. { GetEventMask, "GetEventMask" },
  101. { GetFirstClient, "GetFirstClient" },
  102. { GetFirstRegion, "GetFirstRegion" },
  103. { GetFirstTuple, "GetFirstTuple" },
  104. { GetNextClient, "GetNextClient" },
  105. { GetNextRegion, "GetNextRegion" },
  106. { GetNextTuple, "GetNextTuple" },
  107. { GetStatus, "GetStatus" },
  108. { GetTupleData, "GetTupleData" },
  109. { MapMemPage, "MapMemPage" },
  110. { ModifyConfiguration, "ModifyConfiguration" },
  111. { ModifyWindow, "ModifyWindow" },
  112. { OpenMemory, "OpenMemory" },
  113. { ParseTuple, "ParseTuple" },
  114. { ReadMemory, "ReadMemory" },
  115. { RegisterClient, "RegisterClient" },
  116. { RegisterEraseQueue, "RegisterEraseQueue" },
  117. { RegisterMTD, "RegisterMTD" },
  118. { ReleaseConfiguration, "ReleaseConfiguration" },
  119. { ReleaseIO, "ReleaseIO" },
  120. { ReleaseIRQ, "ReleaseIRQ" },
  121. { ReleaseWindow, "ReleaseWindow" },
  122. { RequestConfiguration, "RequestConfiguration" },
  123. { RequestIO, "RequestIO" },
  124. { RequestIRQ, "RequestIRQ" },
  125. { RequestSocketMask, "RequestSocketMask" },
  126. { RequestWindow, "RequestWindow" },
  127. { ResetCard, "ResetCard" },
  128. { SetEventMask, "SetEventMask" },
  129. { ValidateCIS, "ValidateCIS" },
  130. { WriteMemory, "WriteMemory" },
  131. { BindDevice, "BindDevice" },
  132. { BindMTD, "BindMTD" },
  133. { ReportError, "ReportError" },
  134. { SuspendCard, "SuspendCard" },
  135. { ResumeCard, "ResumeCard" },
  136. { EjectCard, "EjectCard" },
  137. { InsertCard, "InsertCard" },
  138. { ReplaceCIS, "ReplaceCIS" }
  139. };
  140. static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
  141. {
  142. int i;
  143. char *serv;
  144. if (!p_dev)
  145. printk(KERN_NOTICE);
  146. else
  147. printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
  148. for (i = 0; i < ARRAY_SIZE(service_table); i++)
  149. if (service_table[i].key == err->func)
  150. break;
  151. if (i < ARRAY_SIZE(service_table))
  152. serv = service_table[i].msg;
  153. else
  154. serv = "Unknown service number";
  155. for (i = 0; i < ARRAY_SIZE(error_table); i++)
  156. if (error_table[i].key == err->retcode)
  157. break;
  158. if (i < ARRAY_SIZE(error_table))
  159. printk("%s: %s\n", serv, error_table[i].msg);
  160. else
  161. printk("%s: Unknown error code %#x\n", serv, err->retcode);
  162. return CS_SUCCESS;
  163. } /* report_error */
  164. /* end of code which was in cs.c before */
  165. /*======================================================================*/
  166. void cs_error(struct pcmcia_device *p_dev, int func, int ret)
  167. {
  168. error_info_t err = { func, ret };
  169. pcmcia_report_error(p_dev, &err);
  170. }
  171. EXPORT_SYMBOL(cs_error);
  172. static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
  173. {
  174. struct pcmcia_device_id *did = p_drv->id_table;
  175. unsigned int i;
  176. u32 hash;
  177. if (!p_drv->probe || !p_drv->remove)
  178. printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
  179. "function\n", p_drv->drv.name);
  180. while (did && did->match_flags) {
  181. for (i=0; i<4; i++) {
  182. if (!did->prod_id[i])
  183. continue;
  184. hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
  185. if (hash == did->prod_id_hash[i])
  186. continue;
  187. printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
  188. "product string \"%s\": is 0x%x, should "
  189. "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
  190. did->prod_id_hash[i], hash);
  191. printk(KERN_DEBUG "pcmcia: see "
  192. "Documentation/pcmcia/devicetable.txt for "
  193. "details\n");
  194. }
  195. did++;
  196. }
  197. return;
  198. }
  199. #ifdef CONFIG_PCMCIA_LOAD_CIS
  200. /**
  201. * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
  202. * @dev - the pcmcia device which needs a CIS override
  203. * @filename - requested filename in /lib/firmware/cis/
  204. *
  205. * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
  206. * the one provided by the card is broken. The firmware files reside in
  207. * /lib/firmware/cis/ in userspace.
  208. */
  209. static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
  210. {
  211. struct pcmcia_socket *s = dev->socket;
  212. const struct firmware *fw;
  213. char path[20];
  214. int ret=-ENOMEM;
  215. cisdump_t *cis;
  216. if (!filename)
  217. return -EINVAL;
  218. ds_dbg(1, "trying to load firmware %s\n", filename);
  219. if (strlen(filename) > 14)
  220. return -EINVAL;
  221. snprintf(path, 20, "%s", filename);
  222. if (request_firmware(&fw, path, &dev->dev) == 0) {
  223. if (fw->size >= CISTPL_MAX_CIS_SIZE)
  224. goto release;
  225. cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
  226. if (!cis)
  227. goto release;
  228. cis->Length = fw->size + 1;
  229. memcpy(cis->Data, fw->data, fw->size);
  230. if (!pcmcia_replace_cis(s, cis))
  231. ret = 0;
  232. }
  233. release:
  234. release_firmware(fw);
  235. return (ret);
  236. }
  237. #else /* !CONFIG_PCMCIA_LOAD_CIS */
  238. static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
  239. {
  240. return -ENODEV;
  241. }
  242. #endif
  243. /*======================================================================*/
  244. /**
  245. * pcmcia_register_driver - register a PCMCIA driver with the bus core
  246. *
  247. * Registers a PCMCIA driver with the PCMCIA bus core.
  248. */
  249. static int pcmcia_device_probe(struct device *dev);
  250. static int pcmcia_device_remove(struct device * dev);
  251. int pcmcia_register_driver(struct pcmcia_driver *driver)
  252. {
  253. if (!driver)
  254. return -EINVAL;
  255. pcmcia_check_driver(driver);
  256. /* initialize common fields */
  257. driver->drv.bus = &pcmcia_bus_type;
  258. driver->drv.owner = driver->owner;
  259. return driver_register(&driver->drv);
  260. }
  261. EXPORT_SYMBOL(pcmcia_register_driver);
  262. /**
  263. * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
  264. */
  265. void pcmcia_unregister_driver(struct pcmcia_driver *driver)
  266. {
  267. driver_unregister(&driver->drv);
  268. }
  269. EXPORT_SYMBOL(pcmcia_unregister_driver);
  270. /* pcmcia_device handling */
  271. struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
  272. {
  273. struct device *tmp_dev;
  274. tmp_dev = get_device(&p_dev->dev);
  275. if (!tmp_dev)
  276. return NULL;
  277. return to_pcmcia_dev(tmp_dev);
  278. }
  279. void pcmcia_put_dev(struct pcmcia_device *p_dev)
  280. {
  281. if (p_dev)
  282. put_device(&p_dev->dev);
  283. }
  284. static void pcmcia_release_dev(struct device *dev)
  285. {
  286. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  287. ds_dbg(1, "releasing dev %p\n", p_dev);
  288. pcmcia_put_socket(p_dev->socket);
  289. kfree(p_dev->devname);
  290. kfree(p_dev);
  291. }
  292. static void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
  293. {
  294. if (!s->pcmcia_state.device_add_pending) {
  295. s->pcmcia_state.device_add_pending = 1;
  296. schedule_work(&s->device_add);
  297. }
  298. return;
  299. }
  300. static int pcmcia_device_probe(struct device * dev)
  301. {
  302. struct pcmcia_device *p_dev;
  303. struct pcmcia_driver *p_drv;
  304. struct pcmcia_device_id *did;
  305. struct pcmcia_socket *s;
  306. int ret = 0;
  307. dev = get_device(dev);
  308. if (!dev)
  309. return -ENODEV;
  310. p_dev = to_pcmcia_dev(dev);
  311. p_drv = to_pcmcia_drv(dev->driver);
  312. s = p_dev->socket;
  313. if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
  314. ret = -EINVAL;
  315. goto put_dev;
  316. }
  317. p_dev->state &= ~CLIENT_UNBOUND;
  318. /* set up the device configuration, if it hasn't been done before */
  319. if (!s->functions) {
  320. cistpl_longlink_mfc_t mfc;
  321. if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
  322. &mfc) == CS_SUCCESS)
  323. s->functions = mfc.nfn;
  324. else
  325. s->functions = 1;
  326. s->config = kzalloc(sizeof(config_t) * s->functions,
  327. GFP_KERNEL);
  328. if (!s->config) {
  329. ret = -ENOMEM;
  330. goto put_module;
  331. }
  332. }
  333. p_dev->function_config = &s->config[p_dev->func];
  334. ret = p_drv->probe(p_dev);
  335. if (ret)
  336. goto put_module;
  337. /* handle pseudo multifunction devices:
  338. * there are at most two pseudo multifunction devices.
  339. * if we're matching against the first, schedule a
  340. * call which will then check whether there are two
  341. * pseudo devices, and if not, add the second one.
  342. */
  343. did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
  344. if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
  345. (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
  346. pcmcia_add_pseudo_device(p_dev->socket);
  347. put_module:
  348. if (ret)
  349. module_put(p_drv->owner);
  350. put_dev:
  351. if (ret)
  352. put_device(dev);
  353. return (ret);
  354. }
  355. static int pcmcia_device_remove(struct device * dev)
  356. {
  357. struct pcmcia_device *p_dev;
  358. struct pcmcia_driver *p_drv;
  359. int i;
  360. /* detach the "instance" */
  361. p_dev = to_pcmcia_dev(dev);
  362. p_drv = to_pcmcia_drv(dev->driver);
  363. if (!p_drv)
  364. return 0;
  365. if (p_drv->remove)
  366. p_drv->remove(p_dev);
  367. /* check for proper unloading */
  368. if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
  369. printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
  370. p_drv->drv.name);
  371. for (i = 0; i < MAX_WIN; i++)
  372. if (p_dev->state & CLIENT_WIN_REQ(i))
  373. printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
  374. p_drv->drv.name);
  375. /* references from pcmcia_probe_device */
  376. p_dev->state = CLIENT_UNBOUND;
  377. pcmcia_put_dev(p_dev);
  378. module_put(p_drv->owner);
  379. return 0;
  380. }
  381. /*
  382. * Removes a PCMCIA card from the device tree and socket list.
  383. */
  384. static void pcmcia_card_remove(struct pcmcia_socket *s)
  385. {
  386. struct pcmcia_device *p_dev;
  387. unsigned long flags;
  388. ds_dbg(2, "unbind_request(%d)\n", s->sock);
  389. s->device_count = 0;
  390. for (;;) {
  391. /* unregister all pcmcia_devices registered with this socket*/
  392. spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
  393. if (list_empty(&s->devices_list)) {
  394. spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
  395. return;
  396. }
  397. p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
  398. list_del(&p_dev->socket_device_list);
  399. p_dev->state |= CLIENT_STALE;
  400. spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
  401. device_unregister(&p_dev->dev);
  402. }
  403. return;
  404. } /* unbind_request */
  405. /*
  406. * pcmcia_device_query -- determine information about a pcmcia device
  407. */
  408. static int pcmcia_device_query(struct pcmcia_device *p_dev)
  409. {
  410. cistpl_manfid_t manf_id;
  411. cistpl_funcid_t func_id;
  412. cistpl_vers_1_t *vers1;
  413. unsigned int i;
  414. vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
  415. if (!vers1)
  416. return -ENOMEM;
  417. if (!pccard_read_tuple(p_dev->socket, p_dev->func,
  418. CISTPL_MANFID, &manf_id)) {
  419. p_dev->manf_id = manf_id.manf;
  420. p_dev->card_id = manf_id.card;
  421. p_dev->has_manf_id = 1;
  422. p_dev->has_card_id = 1;
  423. }
  424. if (!pccard_read_tuple(p_dev->socket, p_dev->func,
  425. CISTPL_FUNCID, &func_id)) {
  426. p_dev->func_id = func_id.func;
  427. p_dev->has_func_id = 1;
  428. } else {
  429. /* rule of thumb: cards with no FUNCID, but with
  430. * common memory device geometry information, are
  431. * probably memory cards (from pcmcia-cs) */
  432. cistpl_device_geo_t *devgeo;
  433. devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
  434. if (!devgeo) {
  435. kfree(vers1);
  436. return -ENOMEM;
  437. }
  438. if (!pccard_read_tuple(p_dev->socket, p_dev->func,
  439. CISTPL_DEVICE_GEO, devgeo)) {
  440. ds_dbg(0, "mem device geometry probably means "
  441. "FUNCID_MEMORY\n");
  442. p_dev->func_id = CISTPL_FUNCID_MEMORY;
  443. p_dev->has_func_id = 1;
  444. }
  445. kfree(devgeo);
  446. }
  447. if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
  448. vers1)) {
  449. for (i=0; i < vers1->ns; i++) {
  450. char *tmp;
  451. unsigned int length;
  452. tmp = vers1->str + vers1->ofs[i];
  453. length = strlen(tmp) + 1;
  454. if ((length < 2) || (length > 255))
  455. continue;
  456. p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
  457. GFP_KERNEL);
  458. if (!p_dev->prod_id[i])
  459. continue;
  460. p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
  461. tmp, length);
  462. }
  463. }
  464. kfree(vers1);
  465. return 0;
  466. }
  467. /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
  468. * Serializes pcmcia_device_add; will most likely be removed in future.
  469. *
  470. * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
  471. * won't work, this doesn't matter much at the moment: the driver core doesn't
  472. * support it either.
  473. */
  474. static DECLARE_MUTEX(device_add_lock);
  475. struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
  476. {
  477. struct pcmcia_device *p_dev;
  478. unsigned long flags;
  479. int bus_id_len;
  480. s = pcmcia_get_socket(s);
  481. if (!s)
  482. return NULL;
  483. down(&device_add_lock);
  484. /* max of 2 devices per card */
  485. if (s->device_count == 2)
  486. goto err_put;
  487. p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
  488. if (!p_dev)
  489. goto err_put;
  490. p_dev->socket = s;
  491. p_dev->device_no = (s->device_count++);
  492. p_dev->func = function;
  493. p_dev->dev.bus = &pcmcia_bus_type;
  494. p_dev->dev.parent = s->dev.dev;
  495. p_dev->dev.release = pcmcia_release_dev;
  496. bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
  497. p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
  498. if (!p_dev->devname)
  499. goto err_free;
  500. sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
  501. /* compat */
  502. p_dev->state = CLIENT_UNBOUND;
  503. /* Add to the list in pcmcia_bus_socket */
  504. spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
  505. list_add_tail(&p_dev->socket_device_list, &s->devices_list);
  506. spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
  507. printk(KERN_NOTICE "pcmcia: registering new device %s\n",
  508. p_dev->devname);
  509. pcmcia_device_query(p_dev);
  510. if (device_register(&p_dev->dev)) {
  511. spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
  512. list_del(&p_dev->socket_device_list);
  513. spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
  514. goto err_free;
  515. }
  516. up(&device_add_lock);
  517. return p_dev;
  518. err_free:
  519. kfree(p_dev->devname);
  520. kfree(p_dev);
  521. s->device_count--;
  522. err_put:
  523. up(&device_add_lock);
  524. pcmcia_put_socket(s);
  525. return NULL;
  526. }
  527. static int pcmcia_card_add(struct pcmcia_socket *s)
  528. {
  529. cisinfo_t cisinfo;
  530. cistpl_longlink_mfc_t mfc;
  531. unsigned int no_funcs, i;
  532. int ret = 0;
  533. if (!(s->resource_setup_done))
  534. return -EAGAIN; /* try again, but later... */
  535. if (pcmcia_validate_mem(s))
  536. return -EAGAIN; /* try again, but later... */
  537. ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
  538. if (ret || !cisinfo.Chains) {
  539. ds_dbg(0, "invalid CIS or invalid resources\n");
  540. return -ENODEV;
  541. }
  542. if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
  543. no_funcs = mfc.nfn;
  544. else
  545. no_funcs = 1;
  546. for (i=0; i < no_funcs; i++)
  547. pcmcia_device_add(s, i);
  548. return (ret);
  549. }
  550. static void pcmcia_delayed_add_pseudo_device(void *data)
  551. {
  552. struct pcmcia_socket *s = data;
  553. pcmcia_device_add(s, 0);
  554. s->pcmcia_state.device_add_pending = 0;
  555. }
  556. static int pcmcia_requery(struct device *dev, void * _data)
  557. {
  558. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  559. if (!p_dev->dev.driver)
  560. pcmcia_device_query(p_dev);
  561. return 0;
  562. }
  563. static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
  564. {
  565. int no_devices=0;
  566. unsigned long flags;
  567. /* must be called with skt_sem held */
  568. spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
  569. if (list_empty(&skt->devices_list))
  570. no_devices=1;
  571. spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
  572. /* if no devices were added for this socket yet because of
  573. * missing resource information or other trouble, we need to
  574. * do this now. */
  575. if (no_devices) {
  576. int ret = pcmcia_card_add(skt);
  577. if (ret)
  578. return;
  579. }
  580. /* some device information might have changed because of a CIS
  581. * update or because we can finally read it correctly... so
  582. * determine it again, overwriting old values if necessary. */
  583. bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
  584. /* we re-scan all devices, not just the ones connected to this
  585. * socket. This does not matter, though. */
  586. bus_rescan_devices(&pcmcia_bus_type);
  587. }
  588. static inline int pcmcia_devmatch(struct pcmcia_device *dev,
  589. struct pcmcia_device_id *did)
  590. {
  591. if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
  592. if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
  593. return 0;
  594. }
  595. if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
  596. if ((!dev->has_card_id) || (dev->card_id != did->card_id))
  597. return 0;
  598. }
  599. if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
  600. if (dev->func != did->function)
  601. return 0;
  602. }
  603. if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
  604. if (!dev->prod_id[0])
  605. return 0;
  606. if (strcmp(did->prod_id[0], dev->prod_id[0]))
  607. return 0;
  608. }
  609. if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
  610. if (!dev->prod_id[1])
  611. return 0;
  612. if (strcmp(did->prod_id[1], dev->prod_id[1]))
  613. return 0;
  614. }
  615. if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
  616. if (!dev->prod_id[2])
  617. return 0;
  618. if (strcmp(did->prod_id[2], dev->prod_id[2]))
  619. return 0;
  620. }
  621. if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
  622. if (!dev->prod_id[3])
  623. return 0;
  624. if (strcmp(did->prod_id[3], dev->prod_id[3]))
  625. return 0;
  626. }
  627. if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
  628. if (dev->device_no != did->device_no)
  629. return 0;
  630. }
  631. if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
  632. if ((!dev->has_func_id) || (dev->func_id != did->func_id))
  633. return 0;
  634. /* if this is a pseudo-multi-function device,
  635. * we need explicit matches */
  636. if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
  637. return 0;
  638. if (dev->device_no)
  639. return 0;
  640. /* also, FUNC_ID matching needs to be activated by userspace
  641. * after it has re-checked that there is no possible module
  642. * with a prod_id/manf_id/card_id match.
  643. */
  644. if (!dev->allow_func_id_match)
  645. return 0;
  646. }
  647. if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
  648. if (!dev->socket->fake_cis)
  649. pcmcia_load_firmware(dev, did->cisfile);
  650. if (!dev->socket->fake_cis)
  651. return 0;
  652. }
  653. if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
  654. int i;
  655. for (i=0; i<4; i++)
  656. if (dev->prod_id[i])
  657. return 0;
  658. if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
  659. return 0;
  660. }
  661. dev->dev.driver_data = (void *) did;
  662. return 1;
  663. }
  664. static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
  665. struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
  666. struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
  667. struct pcmcia_device_id *did = p_drv->id_table;
  668. /* matching by cardmgr */
  669. if (p_dev->cardmgr == p_drv)
  670. return 1;
  671. while (did && did->match_flags) {
  672. if (pcmcia_devmatch(p_dev, did))
  673. return 1;
  674. did++;
  675. }
  676. return 0;
  677. }
  678. #ifdef CONFIG_HOTPLUG
  679. static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
  680. char *buffer, int buffer_size)
  681. {
  682. struct pcmcia_device *p_dev;
  683. int i, length = 0;
  684. u32 hash[4] = { 0, 0, 0, 0};
  685. if (!dev)
  686. return -ENODEV;
  687. p_dev = to_pcmcia_dev(dev);
  688. /* calculate hashes */
  689. for (i=0; i<4; i++) {
  690. if (!p_dev->prod_id[i])
  691. continue;
  692. hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
  693. }
  694. i = 0;
  695. if (add_uevent_var(envp, num_envp, &i,
  696. buffer, buffer_size, &length,
  697. "SOCKET_NO=%u",
  698. p_dev->socket->sock))
  699. return -ENOMEM;
  700. if (add_uevent_var(envp, num_envp, &i,
  701. buffer, buffer_size, &length,
  702. "DEVICE_NO=%02X",
  703. p_dev->device_no))
  704. return -ENOMEM;
  705. if (add_uevent_var(envp, num_envp, &i,
  706. buffer, buffer_size, &length,
  707. "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
  708. "pa%08Xpb%08Xpc%08Xpd%08X",
  709. p_dev->has_manf_id ? p_dev->manf_id : 0,
  710. p_dev->has_card_id ? p_dev->card_id : 0,
  711. p_dev->has_func_id ? p_dev->func_id : 0,
  712. p_dev->func,
  713. p_dev->device_no,
  714. hash[0],
  715. hash[1],
  716. hash[2],
  717. hash[3]))
  718. return -ENOMEM;
  719. envp[i] = NULL;
  720. return 0;
  721. }
  722. #else
  723. static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
  724. char *buffer, int buffer_size)
  725. {
  726. return -ENODEV;
  727. }
  728. #endif
  729. /************************ per-device sysfs output ***************************/
  730. #define pcmcia_device_attr(field, test, format) \
  731. static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
  732. { \
  733. struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
  734. return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
  735. }
  736. #define pcmcia_device_stringattr(name, field) \
  737. static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
  738. { \
  739. struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
  740. return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
  741. }
  742. pcmcia_device_attr(func, socket, "0x%02x\n");
  743. pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
  744. pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
  745. pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
  746. pcmcia_device_stringattr(prod_id1, prod_id[0]);
  747. pcmcia_device_stringattr(prod_id2, prod_id[1]);
  748. pcmcia_device_stringattr(prod_id3, prod_id[2]);
  749. pcmcia_device_stringattr(prod_id4, prod_id[3]);
  750. static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
  751. {
  752. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  753. if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
  754. return sprintf(buf, "off\n");
  755. else
  756. return sprintf(buf, "on\n");
  757. }
  758. static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
  759. const char *buf, size_t count)
  760. {
  761. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  762. int ret = 0;
  763. if (!count)
  764. return -EINVAL;
  765. if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
  766. (!strncmp(buf, "off", 3)))
  767. ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
  768. else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
  769. (!strncmp(buf, "on", 2)))
  770. dpm_runtime_resume(dev);
  771. return ret ? ret : count;
  772. }
  773. static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
  774. {
  775. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  776. int i;
  777. u32 hash[4] = { 0, 0, 0, 0};
  778. /* calculate hashes */
  779. for (i=0; i<4; i++) {
  780. if (!p_dev->prod_id[i])
  781. continue;
  782. hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
  783. }
  784. return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
  785. "pa%08Xpb%08Xpc%08Xpd%08X\n",
  786. p_dev->has_manf_id ? p_dev->manf_id : 0,
  787. p_dev->has_card_id ? p_dev->card_id : 0,
  788. p_dev->has_func_id ? p_dev->func_id : 0,
  789. p_dev->func, p_dev->device_no,
  790. hash[0], hash[1], hash[2], hash[3]);
  791. }
  792. static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
  793. struct device_attribute *attr, const char *buf, size_t count)
  794. {
  795. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  796. if (!count)
  797. return -EINVAL;
  798. down(&p_dev->socket->skt_sem);
  799. p_dev->allow_func_id_match = 1;
  800. up(&p_dev->socket->skt_sem);
  801. bus_rescan_devices(&pcmcia_bus_type);
  802. return count;
  803. }
  804. static struct device_attribute pcmcia_dev_attrs[] = {
  805. __ATTR(function, 0444, func_show, NULL),
  806. __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
  807. __ATTR_RO(func_id),
  808. __ATTR_RO(manf_id),
  809. __ATTR_RO(card_id),
  810. __ATTR_RO(prod_id1),
  811. __ATTR_RO(prod_id2),
  812. __ATTR_RO(prod_id3),
  813. __ATTR_RO(prod_id4),
  814. __ATTR_RO(modalias),
  815. __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
  816. __ATTR_NULL,
  817. };
  818. /* PM support, also needed for reset */
  819. static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
  820. {
  821. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  822. struct pcmcia_driver *p_drv = NULL;
  823. if (dev->driver)
  824. p_drv = to_pcmcia_drv(dev->driver);
  825. if (p_drv && p_drv->suspend)
  826. return p_drv->suspend(p_dev);
  827. return 0;
  828. }
  829. static int pcmcia_dev_resume(struct device * dev)
  830. {
  831. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  832. struct pcmcia_driver *p_drv = NULL;
  833. if (dev->driver)
  834. p_drv = to_pcmcia_drv(dev->driver);
  835. if (p_drv && p_drv->resume)
  836. return p_drv->resume(p_dev);
  837. return 0;
  838. }
  839. static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
  840. {
  841. struct pcmcia_socket *skt = _data;
  842. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  843. if (p_dev->socket != skt)
  844. return 0;
  845. return dpm_runtime_suspend(dev, PMSG_SUSPEND);
  846. }
  847. static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
  848. {
  849. struct pcmcia_socket *skt = _data;
  850. struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
  851. if (p_dev->socket != skt)
  852. return 0;
  853. dpm_runtime_resume(dev);
  854. return 0;
  855. }
  856. static int pcmcia_bus_resume(struct pcmcia_socket *skt)
  857. {
  858. bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
  859. return 0;
  860. }
  861. static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
  862. {
  863. if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
  864. pcmcia_bus_suspend_callback)) {
  865. pcmcia_bus_resume(skt);
  866. return -EIO;
  867. }
  868. return 0;
  869. }
  870. /*======================================================================
  871. The card status event handler.
  872. ======================================================================*/
  873. /* Normally, the event is passed to individual drivers after
  874. * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
  875. * is inversed to maintain historic compatibility.
  876. */
  877. static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
  878. {
  879. struct pcmcia_socket *s = pcmcia_get_socket(skt);
  880. ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
  881. event, priority, skt);
  882. switch (event) {
  883. case CS_EVENT_CARD_REMOVAL:
  884. s->pcmcia_state.present = 0;
  885. pcmcia_card_remove(skt);
  886. handle_event(skt, event);
  887. break;
  888. case CS_EVENT_CARD_INSERTION:
  889. s->pcmcia_state.present = 1;
  890. pcmcia_card_add(skt);
  891. handle_event(skt, event);
  892. break;
  893. case CS_EVENT_EJECTION_REQUEST:
  894. break;
  895. case CS_EVENT_PM_SUSPEND:
  896. case CS_EVENT_PM_RESUME:
  897. case CS_EVENT_RESET_PHYSICAL:
  898. case CS_EVENT_CARD_RESET:
  899. default:
  900. handle_event(skt, event);
  901. break;
  902. }
  903. pcmcia_put_socket(s);
  904. return 0;
  905. } /* ds_event */
  906. static struct pcmcia_callback pcmcia_bus_callback = {
  907. .owner = THIS_MODULE,
  908. .event = ds_event,
  909. .requery = pcmcia_bus_rescan,
  910. .suspend = pcmcia_bus_suspend,
  911. .resume = pcmcia_bus_resume,
  912. };
  913. static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
  914. struct class_interface *class_intf)
  915. {
  916. struct pcmcia_socket *socket = class_get_devdata(class_dev);
  917. int ret;
  918. socket = pcmcia_get_socket(socket);
  919. if (!socket) {
  920. printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
  921. return -ENODEV;
  922. }
  923. /*
  924. * Ugly. But we want to wait for the socket threads to have started up.
  925. * We really should let the drivers themselves drive some of this..
  926. */
  927. msleep(250);
  928. #ifdef CONFIG_PCMCIA_IOCTL
  929. init_waitqueue_head(&socket->queue);
  930. #endif
  931. INIT_LIST_HEAD(&socket->devices_list);
  932. INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
  933. memset(&socket->pcmcia_state, 0, sizeof(u8));
  934. socket->device_count = 0;
  935. ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
  936. if (ret) {
  937. printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
  938. pcmcia_put_socket(socket);
  939. return (ret);
  940. }
  941. return 0;
  942. }
  943. static void pcmcia_bus_remove_socket(struct class_device *class_dev,
  944. struct class_interface *class_intf)
  945. {
  946. struct pcmcia_socket *socket = class_get_devdata(class_dev);
  947. if (!socket)
  948. return;
  949. socket->pcmcia_state.dead = 1;
  950. pccard_register_pcmcia(socket, NULL);
  951. pcmcia_put_socket(socket);
  952. return;
  953. }
  954. /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
  955. static struct class_interface pcmcia_bus_interface = {
  956. .class = &pcmcia_socket_class,
  957. .add = &pcmcia_bus_add_socket,
  958. .remove = &pcmcia_bus_remove_socket,
  959. };
  960. struct bus_type pcmcia_bus_type = {
  961. .name = "pcmcia",
  962. .uevent = pcmcia_bus_uevent,
  963. .match = pcmcia_bus_match,
  964. .dev_attrs = pcmcia_dev_attrs,
  965. .probe = pcmcia_device_probe,
  966. .remove = pcmcia_device_remove,
  967. .suspend = pcmcia_dev_suspend,
  968. .resume = pcmcia_dev_resume,
  969. };
  970. static int __init init_pcmcia_bus(void)
  971. {
  972. spin_lock_init(&pcmcia_dev_list_lock);
  973. bus_register(&pcmcia_bus_type);
  974. class_interface_register(&pcmcia_bus_interface);
  975. pcmcia_setup_ioctl();
  976. return 0;
  977. }
  978. fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
  979. * pcmcia_socket_class is already registered */
  980. static void __exit exit_pcmcia_bus(void)
  981. {
  982. pcmcia_cleanup_ioctl();
  983. class_interface_unregister(&pcmcia_bus_interface);
  984. bus_unregister(&pcmcia_bus_type);
  985. }
  986. module_exit(exit_pcmcia_bus);
  987. MODULE_ALIAS("ds");