com20020_cs.c 13 KB

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  1. /*
  2. * Linux ARCnet driver - COM20020 PCMCIA support
  3. *
  4. * Written 1994-1999 by Avery Pennarun,
  5. * based on an ISA version by David Woodhouse.
  6. * Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
  7. * which was derived from pcnet_cs.c by David Hinds.
  8. * Some additional portions derived from skeleton.c by Donald Becker.
  9. *
  10. * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
  11. * for sponsoring the further development of this driver.
  12. *
  13. * **********************
  14. *
  15. * The original copyright of skeleton.c was as follows:
  16. *
  17. * skeleton.c Written 1993 by Donald Becker.
  18. * Copyright 1993 United States Government as represented by the
  19. * Director, National Security Agency. This software may only be used
  20. * and distributed according to the terms of the GNU General Public License as
  21. * modified by SRC, incorporated herein by reference.
  22. *
  23. * **********************
  24. * Changes:
  25. * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/08/2000
  26. * - reorganize kmallocs in com20020_attach, checking all for failure
  27. * and releasing the previous allocations if one fails
  28. * **********************
  29. *
  30. * For more details, see drivers/net/arcnet.c
  31. *
  32. * **********************
  33. */
  34. #include <linux/kernel.h>
  35. #include <linux/init.h>
  36. #include <linux/ptrace.h>
  37. #include <linux/slab.h>
  38. #include <linux/string.h>
  39. #include <linux/timer.h>
  40. #include <linux/delay.h>
  41. #include <linux/module.h>
  42. #include <linux/netdevice.h>
  43. #include <linux/arcdevice.h>
  44. #include <linux/com20020.h>
  45. #include <pcmcia/cs_types.h>
  46. #include <pcmcia/cs.h>
  47. #include <pcmcia/cistpl.h>
  48. #include <pcmcia/ds.h>
  49. #include <asm/io.h>
  50. #include <asm/system.h>
  51. #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
  52. #ifdef PCMCIA_DEBUG
  53. static int pc_debug = PCMCIA_DEBUG;
  54. module_param(pc_debug, int, 0);
  55. #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  56. static void regdump(struct net_device *dev)
  57. {
  58. int ioaddr = dev->base_addr;
  59. int count;
  60. printk("com20020 register dump:\n");
  61. for (count = ioaddr; count < ioaddr + 16; count++)
  62. {
  63. if (!(count % 16))
  64. printk("\n%04X: ", count);
  65. printk("%02X ", inb(count));
  66. }
  67. printk("\n");
  68. printk("buffer0 dump:\n");
  69. /* set up the address register */
  70. count = 0;
  71. outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
  72. outb(count & 0xff, _ADDR_LO);
  73. for (count = 0; count < 256+32; count++)
  74. {
  75. if (!(count % 16))
  76. printk("\n%04X: ", count);
  77. /* copy the data */
  78. printk("%02X ", inb(_MEMDATA));
  79. }
  80. printk("\n");
  81. }
  82. #else
  83. #define DEBUG(n, args...) do { } while (0)
  84. static inline void regdump(struct net_device *dev) { }
  85. #endif
  86. /*====================================================================*/
  87. /* Parameters that can be set with 'insmod' */
  88. static int node;
  89. static int timeout = 3;
  90. static int backplane;
  91. static int clockp;
  92. static int clockm;
  93. module_param(node, int, 0);
  94. module_param(timeout, int, 0);
  95. module_param(backplane, int, 0);
  96. module_param(clockp, int, 0);
  97. module_param(clockm, int, 0);
  98. MODULE_LICENSE("GPL");
  99. /*====================================================================*/
  100. static void com20020_config(dev_link_t *link);
  101. static void com20020_release(dev_link_t *link);
  102. static int com20020_event(event_t event, int priority,
  103. event_callback_args_t *args);
  104. static dev_info_t dev_info = "com20020_cs";
  105. static dev_link_t *com20020_attach(void);
  106. static void com20020_detach(dev_link_t *);
  107. static dev_link_t *dev_list;
  108. /*====================================================================*/
  109. typedef struct com20020_dev_t {
  110. struct net_device *dev;
  111. dev_node_t node;
  112. } com20020_dev_t;
  113. /*======================================================================
  114. com20020_attach() creates an "instance" of the driver, allocating
  115. local data structures for one device. The device is registered
  116. with Card Services.
  117. ======================================================================*/
  118. static dev_link_t *com20020_attach(void)
  119. {
  120. client_reg_t client_reg;
  121. dev_link_t *link;
  122. com20020_dev_t *info;
  123. struct net_device *dev;
  124. int ret;
  125. struct arcnet_local *lp;
  126. DEBUG(0, "com20020_attach()\n");
  127. /* Create new network device */
  128. link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
  129. if (!link)
  130. return NULL;
  131. info = kmalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
  132. if (!info)
  133. goto fail_alloc_info;
  134. dev = alloc_arcdev("");
  135. if (!dev)
  136. goto fail_alloc_dev;
  137. memset(info, 0, sizeof(struct com20020_dev_t));
  138. memset(link, 0, sizeof(struct dev_link_t));
  139. lp = dev->priv;
  140. lp->timeout = timeout;
  141. lp->backplane = backplane;
  142. lp->clockp = clockp;
  143. lp->clockm = clockm & 3;
  144. lp->hw.owner = THIS_MODULE;
  145. /* fill in our module parameters as defaults */
  146. dev->dev_addr[0] = node;
  147. link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
  148. link->io.NumPorts1 = 16;
  149. link->io.IOAddrLines = 16;
  150. link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
  151. link->irq.IRQInfo1 = IRQ_LEVEL_ID;
  152. link->conf.Attributes = CONF_ENABLE_IRQ;
  153. link->conf.Vcc = 50;
  154. link->conf.IntType = INT_MEMORY_AND_IO;
  155. link->conf.Present = PRESENT_OPTION;
  156. link->irq.Instance = info->dev = dev;
  157. link->priv = info;
  158. /* Register with Card Services */
  159. link->next = dev_list;
  160. dev_list = link;
  161. client_reg.dev_info = &dev_info;
  162. client_reg.Version = 0x0210;
  163. client_reg.event_callback_args.client_data = link;
  164. ret = pcmcia_register_client(&link->handle, &client_reg);
  165. if (ret != 0) {
  166. cs_error(link->handle, RegisterClient, ret);
  167. com20020_detach(link);
  168. return NULL;
  169. }
  170. return link;
  171. fail_alloc_dev:
  172. kfree(info);
  173. fail_alloc_info:
  174. kfree(link);
  175. return NULL;
  176. } /* com20020_attach */
  177. /*======================================================================
  178. This deletes a driver "instance". The device is de-registered
  179. with Card Services. If it has been released, all local data
  180. structures are freed. Otherwise, the structures will be freed
  181. when the device is released.
  182. ======================================================================*/
  183. static void com20020_detach(dev_link_t *link)
  184. {
  185. struct com20020_dev_t *info = link->priv;
  186. dev_link_t **linkp;
  187. struct net_device *dev;
  188. DEBUG(1,"detach...\n");
  189. DEBUG(0, "com20020_detach(0x%p)\n", link);
  190. /* Locate device structure */
  191. for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
  192. if (*linkp == link) break;
  193. if (*linkp == NULL)
  194. return;
  195. dev = info->dev;
  196. if (link->dev) {
  197. DEBUG(1,"unregister...\n");
  198. unregister_netdev(dev);
  199. /*
  200. * this is necessary because we register our IRQ separately
  201. * from card services.
  202. */
  203. if (dev->irq)
  204. free_irq(dev->irq, dev);
  205. }
  206. if (link->state & DEV_CONFIG)
  207. com20020_release(link);
  208. if (link->handle)
  209. pcmcia_deregister_client(link->handle);
  210. /* Unlink device structure, free bits */
  211. DEBUG(1,"unlinking...\n");
  212. *linkp = link->next;
  213. if (link->priv)
  214. {
  215. dev = info->dev;
  216. if (dev)
  217. {
  218. DEBUG(1,"kfree...\n");
  219. free_netdev(dev);
  220. }
  221. DEBUG(1,"kfree2...\n");
  222. kfree(info);
  223. }
  224. DEBUG(1,"kfree3...\n");
  225. kfree(link);
  226. } /* com20020_detach */
  227. /*======================================================================
  228. com20020_config() is scheduled to run after a CARD_INSERTION event
  229. is received, to configure the PCMCIA socket, and to make the
  230. device available to the system.
  231. ======================================================================*/
  232. #define CS_CHECK(fn, ret) \
  233. do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
  234. static void com20020_config(dev_link_t *link)
  235. {
  236. struct arcnet_local *lp;
  237. client_handle_t handle;
  238. tuple_t tuple;
  239. cisparse_t parse;
  240. com20020_dev_t *info;
  241. struct net_device *dev;
  242. int i, last_ret, last_fn;
  243. u_char buf[64];
  244. int ioaddr;
  245. handle = link->handle;
  246. info = link->priv;
  247. dev = info->dev;
  248. DEBUG(1,"config...\n");
  249. DEBUG(0, "com20020_config(0x%p)\n", link);
  250. tuple.Attributes = 0;
  251. tuple.TupleData = buf;
  252. tuple.TupleDataMax = 64;
  253. tuple.TupleOffset = 0;
  254. tuple.DesiredTuple = CISTPL_CONFIG;
  255. CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
  256. CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
  257. CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
  258. link->conf.ConfigBase = parse.config.base;
  259. /* Configure card */
  260. link->state |= DEV_CONFIG;
  261. DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
  262. i = !CS_SUCCESS;
  263. if (!link->io.BasePort1)
  264. {
  265. for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
  266. {
  267. link->io.BasePort1 = ioaddr;
  268. i = pcmcia_request_io(link->handle, &link->io);
  269. if (i == CS_SUCCESS)
  270. break;
  271. }
  272. }
  273. else
  274. i = pcmcia_request_io(link->handle, &link->io);
  275. if (i != CS_SUCCESS)
  276. {
  277. DEBUG(1,"arcnet: requestIO failed totally!\n");
  278. goto failed;
  279. }
  280. ioaddr = dev->base_addr = link->io.BasePort1;
  281. DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);
  282. DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
  283. link->irq.AssignedIRQ,
  284. link->irq.IRQInfo1, link->irq.IRQInfo2);
  285. i = pcmcia_request_irq(link->handle, &link->irq);
  286. if (i != CS_SUCCESS)
  287. {
  288. DEBUG(1,"arcnet: requestIRQ failed totally!\n");
  289. goto failed;
  290. }
  291. dev->irq = link->irq.AssignedIRQ;
  292. CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
  293. if (com20020_check(dev))
  294. {
  295. regdump(dev);
  296. goto failed;
  297. }
  298. lp = dev->priv;
  299. lp->card_name = "PCMCIA COM20020";
  300. lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
  301. link->dev = &info->node;
  302. link->state &= ~DEV_CONFIG_PENDING;
  303. SET_NETDEV_DEV(dev, &handle_to_dev(handle));
  304. i = com20020_found(dev, 0); /* calls register_netdev */
  305. if (i != 0) {
  306. DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
  307. link->dev = NULL;
  308. goto failed;
  309. }
  310. strcpy(info->node.dev_name, dev->name);
  311. DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
  312. dev->name, dev->base_addr, dev->irq);
  313. return;
  314. cs_failed:
  315. cs_error(link->handle, last_fn, last_ret);
  316. failed:
  317. DEBUG(1,"com20020_config failed...\n");
  318. com20020_release(link);
  319. } /* com20020_config */
  320. /*======================================================================
  321. After a card is removed, com20020_release() will unregister the net
  322. device, and release the PCMCIA configuration. If the device is
  323. still open, this will be postponed until it is closed.
  324. ======================================================================*/
  325. static void com20020_release(dev_link_t *link)
  326. {
  327. DEBUG(1,"release...\n");
  328. DEBUG(0, "com20020_release(0x%p)\n", link);
  329. pcmcia_release_configuration(link->handle);
  330. pcmcia_release_io(link->handle, &link->io);
  331. pcmcia_release_irq(link->handle, &link->irq);
  332. link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING);
  333. }
  334. /*======================================================================
  335. The card status event handler. Mostly, this schedules other
  336. stuff to run after an event is received. A CARD_REMOVAL event
  337. also sets some flags to discourage the net drivers from trying
  338. to talk to the card any more.
  339. ======================================================================*/
  340. static int com20020_event(event_t event, int priority,
  341. event_callback_args_t *args)
  342. {
  343. dev_link_t *link = args->client_data;
  344. com20020_dev_t *info = link->priv;
  345. struct net_device *dev = info->dev;
  346. DEBUG(1, "com20020_event(0x%06x)\n", event);
  347. switch (event) {
  348. case CS_EVENT_CARD_REMOVAL:
  349. link->state &= ~DEV_PRESENT;
  350. if (link->state & DEV_CONFIG)
  351. netif_device_detach(dev);
  352. break;
  353. case CS_EVENT_CARD_INSERTION:
  354. link->state |= DEV_PRESENT;
  355. com20020_config(link);
  356. break;
  357. case CS_EVENT_PM_SUSPEND:
  358. link->state |= DEV_SUSPEND;
  359. /* Fall through... */
  360. case CS_EVENT_RESET_PHYSICAL:
  361. if (link->state & DEV_CONFIG) {
  362. if (link->open) {
  363. netif_device_detach(dev);
  364. }
  365. pcmcia_release_configuration(link->handle);
  366. }
  367. break;
  368. case CS_EVENT_PM_RESUME:
  369. link->state &= ~DEV_SUSPEND;
  370. /* Fall through... */
  371. case CS_EVENT_CARD_RESET:
  372. if (link->state & DEV_CONFIG) {
  373. pcmcia_request_configuration(link->handle, &link->conf);
  374. if (link->open) {
  375. int ioaddr = dev->base_addr;
  376. struct arcnet_local *lp = dev->priv;
  377. ARCRESET;
  378. }
  379. }
  380. break;
  381. }
  382. return 0;
  383. } /* com20020_event */
  384. static struct pcmcia_device_id com20020_ids[] = {
  385. PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.", "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
  386. PCMCIA_DEVICE_NULL
  387. };
  388. MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
  389. static struct pcmcia_driver com20020_cs_driver = {
  390. .owner = THIS_MODULE,
  391. .drv = {
  392. .name = "com20020_cs",
  393. },
  394. .attach = com20020_attach,
  395. .event = com20020_event,
  396. .detach = com20020_detach,
  397. .id_table = com20020_ids,
  398. };
  399. static int __init init_com20020_cs(void)
  400. {
  401. return pcmcia_register_driver(&com20020_cs_driver);
  402. }
  403. static void __exit exit_com20020_cs(void)
  404. {
  405. pcmcia_unregister_driver(&com20020_cs_driver);
  406. BUG_ON(dev_list != NULL);
  407. }
  408. module_init(init_com20020_cs);
  409. module_exit(exit_com20020_cs);