icside.c 18 KB

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  1. /*
  2. * linux/drivers/ide/arm/icside.c
  3. *
  4. * Copyright (c) 1996-2004 Russell King.
  5. *
  6. * Please note that this platform does not support 32-bit IDE IO.
  7. */
  8. #include <linux/string.h>
  9. #include <linux/module.h>
  10. #include <linux/ioport.h>
  11. #include <linux/slab.h>
  12. #include <linux/blkdev.h>
  13. #include <linux/errno.h>
  14. #include <linux/hdreg.h>
  15. #include <linux/ide.h>
  16. #include <linux/dma-mapping.h>
  17. #include <linux/device.h>
  18. #include <linux/init.h>
  19. #include <linux/scatterlist.h>
  20. #include <linux/io.h>
  21. #include <asm/dma.h>
  22. #include <asm/ecard.h>
  23. #define ICS_IDENT_OFFSET 0x2280
  24. #define ICS_ARCIN_V5_INTRSTAT 0x0000
  25. #define ICS_ARCIN_V5_INTROFFSET 0x0004
  26. #define ICS_ARCIN_V5_IDEOFFSET 0x2800
  27. #define ICS_ARCIN_V5_IDEALTOFFSET 0x2b80
  28. #define ICS_ARCIN_V5_IDESTEPPING 6
  29. #define ICS_ARCIN_V6_IDEOFFSET_1 0x2000
  30. #define ICS_ARCIN_V6_INTROFFSET_1 0x2200
  31. #define ICS_ARCIN_V6_INTRSTAT_1 0x2290
  32. #define ICS_ARCIN_V6_IDEALTOFFSET_1 0x2380
  33. #define ICS_ARCIN_V6_IDEOFFSET_2 0x3000
  34. #define ICS_ARCIN_V6_INTROFFSET_2 0x3200
  35. #define ICS_ARCIN_V6_INTRSTAT_2 0x3290
  36. #define ICS_ARCIN_V6_IDEALTOFFSET_2 0x3380
  37. #define ICS_ARCIN_V6_IDESTEPPING 6
  38. struct cardinfo {
  39. unsigned int dataoffset;
  40. unsigned int ctrloffset;
  41. unsigned int stepping;
  42. };
  43. static struct cardinfo icside_cardinfo_v5 = {
  44. .dataoffset = ICS_ARCIN_V5_IDEOFFSET,
  45. .ctrloffset = ICS_ARCIN_V5_IDEALTOFFSET,
  46. .stepping = ICS_ARCIN_V5_IDESTEPPING,
  47. };
  48. static struct cardinfo icside_cardinfo_v6_1 = {
  49. .dataoffset = ICS_ARCIN_V6_IDEOFFSET_1,
  50. .ctrloffset = ICS_ARCIN_V6_IDEALTOFFSET_1,
  51. .stepping = ICS_ARCIN_V6_IDESTEPPING,
  52. };
  53. static struct cardinfo icside_cardinfo_v6_2 = {
  54. .dataoffset = ICS_ARCIN_V6_IDEOFFSET_2,
  55. .ctrloffset = ICS_ARCIN_V6_IDEALTOFFSET_2,
  56. .stepping = ICS_ARCIN_V6_IDESTEPPING,
  57. };
  58. struct icside_state {
  59. unsigned int channel;
  60. unsigned int enabled;
  61. void __iomem *irq_port;
  62. void __iomem *ioc_base;
  63. unsigned int type;
  64. /* parent device... until the IDE core gets one of its own */
  65. struct device *dev;
  66. ide_hwif_t *hwif[2];
  67. };
  68. #define ICS_TYPE_A3IN 0
  69. #define ICS_TYPE_A3USER 1
  70. #define ICS_TYPE_V6 3
  71. #define ICS_TYPE_V5 15
  72. #define ICS_TYPE_NOTYPE ((unsigned int)-1)
  73. /* ---------------- Version 5 PCB Support Functions --------------------- */
  74. /* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
  75. * Purpose : enable interrupts from card
  76. */
  77. static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
  78. {
  79. struct icside_state *state = ec->irq_data;
  80. writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
  81. }
  82. /* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
  83. * Purpose : disable interrupts from card
  84. */
  85. static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
  86. {
  87. struct icside_state *state = ec->irq_data;
  88. readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
  89. }
  90. static const expansioncard_ops_t icside_ops_arcin_v5 = {
  91. .irqenable = icside_irqenable_arcin_v5,
  92. .irqdisable = icside_irqdisable_arcin_v5,
  93. };
  94. /* ---------------- Version 6 PCB Support Functions --------------------- */
  95. /* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
  96. * Purpose : enable interrupts from card
  97. */
  98. static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
  99. {
  100. struct icside_state *state = ec->irq_data;
  101. void __iomem *base = state->irq_port;
  102. state->enabled = 1;
  103. switch (state->channel) {
  104. case 0:
  105. writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
  106. readb(base + ICS_ARCIN_V6_INTROFFSET_2);
  107. break;
  108. case 1:
  109. writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
  110. readb(base + ICS_ARCIN_V6_INTROFFSET_1);
  111. break;
  112. }
  113. }
  114. /* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
  115. * Purpose : disable interrupts from card
  116. */
  117. static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
  118. {
  119. struct icside_state *state = ec->irq_data;
  120. state->enabled = 0;
  121. readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
  122. readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
  123. }
  124. /* Prototype: icside_irqprobe(struct expansion_card *ec)
  125. * Purpose : detect an active interrupt from card
  126. */
  127. static int icside_irqpending_arcin_v6(struct expansion_card *ec)
  128. {
  129. struct icside_state *state = ec->irq_data;
  130. return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
  131. readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
  132. }
  133. static const expansioncard_ops_t icside_ops_arcin_v6 = {
  134. .irqenable = icside_irqenable_arcin_v6,
  135. .irqdisable = icside_irqdisable_arcin_v6,
  136. .irqpending = icside_irqpending_arcin_v6,
  137. };
  138. /*
  139. * Handle routing of interrupts. This is called before
  140. * we write the command to the drive.
  141. */
  142. static void icside_maskproc(ide_drive_t *drive, int mask)
  143. {
  144. ide_hwif_t *hwif = HWIF(drive);
  145. struct icside_state *state = hwif->hwif_data;
  146. unsigned long flags;
  147. local_irq_save(flags);
  148. state->channel = hwif->channel;
  149. if (state->enabled && !mask) {
  150. switch (hwif->channel) {
  151. case 0:
  152. writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
  153. readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
  154. break;
  155. case 1:
  156. writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
  157. readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
  158. break;
  159. }
  160. } else {
  161. readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
  162. readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
  163. }
  164. local_irq_restore(flags);
  165. }
  166. #ifdef CONFIG_BLK_DEV_IDEDMA_ICS
  167. /*
  168. * SG-DMA support.
  169. *
  170. * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
  171. * There is only one DMA controller per card, which means that only
  172. * one drive can be accessed at one time. NOTE! We do not enforce that
  173. * here, but we rely on the main IDE driver spotting that both
  174. * interfaces use the same IRQ, which should guarantee this.
  175. */
  176. static void icside_build_sglist(ide_drive_t *drive, struct request *rq)
  177. {
  178. ide_hwif_t *hwif = drive->hwif;
  179. struct icside_state *state = hwif->hwif_data;
  180. struct scatterlist *sg = hwif->sg_table;
  181. ide_map_sg(drive, rq);
  182. if (rq_data_dir(rq) == READ)
  183. hwif->sg_dma_direction = DMA_FROM_DEVICE;
  184. else
  185. hwif->sg_dma_direction = DMA_TO_DEVICE;
  186. hwif->sg_nents = dma_map_sg(state->dev, sg, hwif->sg_nents,
  187. hwif->sg_dma_direction);
  188. }
  189. /*
  190. * Configure the IOMD to give the appropriate timings for the transfer
  191. * mode being requested. We take the advice of the ATA standards, and
  192. * calculate the cycle time based on the transfer mode, and the EIDE
  193. * MW DMA specs that the drive provides in the IDENTIFY command.
  194. *
  195. * We have the following IOMD DMA modes to choose from:
  196. *
  197. * Type Active Recovery Cycle
  198. * A 250 (250) 312 (550) 562 (800)
  199. * B 187 250 437
  200. * C 125 (125) 125 (375) 250 (500)
  201. * D 62 125 187
  202. *
  203. * (figures in brackets are actual measured timings)
  204. *
  205. * However, we also need to take care of the read/write active and
  206. * recovery timings:
  207. *
  208. * Read Write
  209. * Mode Active -- Recovery -- Cycle IOMD type
  210. * MW0 215 50 215 480 A
  211. * MW1 80 50 50 150 C
  212. * MW2 70 25 25 120 C
  213. */
  214. static int icside_set_speed(ide_drive_t *drive, const u8 xfer_mode)
  215. {
  216. int cycle_time, use_dma_info = 0;
  217. switch (xfer_mode) {
  218. case XFER_MW_DMA_2:
  219. cycle_time = 250;
  220. use_dma_info = 1;
  221. break;
  222. case XFER_MW_DMA_1:
  223. cycle_time = 250;
  224. use_dma_info = 1;
  225. break;
  226. case XFER_MW_DMA_0:
  227. cycle_time = 480;
  228. break;
  229. case XFER_SW_DMA_2:
  230. case XFER_SW_DMA_1:
  231. case XFER_SW_DMA_0:
  232. cycle_time = 480;
  233. break;
  234. default:
  235. return 1;
  236. }
  237. /*
  238. * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
  239. * take care to note the values in the ID...
  240. */
  241. if (use_dma_info && drive->id->eide_dma_time > cycle_time)
  242. cycle_time = drive->id->eide_dma_time;
  243. drive->drive_data = cycle_time;
  244. printk("%s: %s selected (peak %dMB/s)\n", drive->name,
  245. ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
  246. return ide_config_drive_speed(drive, xfer_mode);
  247. }
  248. static void icside_dma_host_off(ide_drive_t *drive)
  249. {
  250. }
  251. static void icside_dma_off_quietly(ide_drive_t *drive)
  252. {
  253. drive->using_dma = 0;
  254. }
  255. static void icside_dma_host_on(ide_drive_t *drive)
  256. {
  257. }
  258. static int icside_dma_on(ide_drive_t *drive)
  259. {
  260. drive->using_dma = 1;
  261. return 0;
  262. }
  263. static int icside_dma_check(ide_drive_t *drive)
  264. {
  265. struct hd_driveid *id = drive->id;
  266. ide_hwif_t *hwif = HWIF(drive);
  267. int xfer_mode = 0;
  268. if (!(id->capability & 1) || !hwif->autodma)
  269. goto out;
  270. /*
  271. * Consult the list of known "bad" drives
  272. */
  273. if (__ide_dma_bad_drive(drive))
  274. goto out;
  275. /*
  276. * Enable DMA on any drive that has multiword DMA
  277. */
  278. if (id->field_valid & 2) {
  279. xfer_mode = ide_max_dma_mode(drive);
  280. goto out;
  281. }
  282. /*
  283. * Consult the list of known "good" drives
  284. */
  285. if (__ide_dma_good_drive(drive)) {
  286. if (id->eide_dma_time > 150)
  287. goto out;
  288. xfer_mode = XFER_MW_DMA_1;
  289. }
  290. out:
  291. if (xfer_mode == 0)
  292. return -1;
  293. return icside_set_speed(drive, xfer_mode) ? -1 : 0;
  294. }
  295. static int icside_dma_end(ide_drive_t *drive)
  296. {
  297. ide_hwif_t *hwif = HWIF(drive);
  298. struct icside_state *state = hwif->hwif_data;
  299. drive->waiting_for_dma = 0;
  300. disable_dma(hwif->hw.dma);
  301. /* Teardown mappings after DMA has completed. */
  302. dma_unmap_sg(state->dev, hwif->sg_table, hwif->sg_nents,
  303. hwif->sg_dma_direction);
  304. return get_dma_residue(hwif->hw.dma) != 0;
  305. }
  306. static void icside_dma_start(ide_drive_t *drive)
  307. {
  308. ide_hwif_t *hwif = HWIF(drive);
  309. /* We can not enable DMA on both channels simultaneously. */
  310. BUG_ON(dma_channel_active(hwif->hw.dma));
  311. enable_dma(hwif->hw.dma);
  312. }
  313. static int icside_dma_setup(ide_drive_t *drive)
  314. {
  315. ide_hwif_t *hwif = HWIF(drive);
  316. struct request *rq = hwif->hwgroup->rq;
  317. unsigned int dma_mode;
  318. if (rq_data_dir(rq))
  319. dma_mode = DMA_MODE_WRITE;
  320. else
  321. dma_mode = DMA_MODE_READ;
  322. /*
  323. * We can not enable DMA on both channels.
  324. */
  325. BUG_ON(dma_channel_active(hwif->hw.dma));
  326. icside_build_sglist(drive, rq);
  327. /*
  328. * Ensure that we have the right interrupt routed.
  329. */
  330. icside_maskproc(drive, 0);
  331. /*
  332. * Route the DMA signals to the correct interface.
  333. */
  334. writeb(hwif->select_data, hwif->config_data);
  335. /*
  336. * Select the correct timing for this drive.
  337. */
  338. set_dma_speed(hwif->hw.dma, drive->drive_data);
  339. /*
  340. * Tell the DMA engine about the SG table and
  341. * data direction.
  342. */
  343. set_dma_sg(hwif->hw.dma, hwif->sg_table, hwif->sg_nents);
  344. set_dma_mode(hwif->hw.dma, dma_mode);
  345. drive->waiting_for_dma = 1;
  346. return 0;
  347. }
  348. static void icside_dma_exec_cmd(ide_drive_t *drive, u8 cmd)
  349. {
  350. /* issue cmd to drive */
  351. ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD, NULL);
  352. }
  353. static int icside_dma_test_irq(ide_drive_t *drive)
  354. {
  355. ide_hwif_t *hwif = HWIF(drive);
  356. struct icside_state *state = hwif->hwif_data;
  357. return readb(state->irq_port +
  358. (hwif->channel ?
  359. ICS_ARCIN_V6_INTRSTAT_2 :
  360. ICS_ARCIN_V6_INTRSTAT_1)) & 1;
  361. }
  362. static void icside_dma_timeout(ide_drive_t *drive)
  363. {
  364. printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
  365. if (icside_dma_test_irq(drive))
  366. return;
  367. ide_dump_status(drive, "DMA timeout", HWIF(drive)->INB(IDE_STATUS_REG));
  368. icside_dma_end(drive);
  369. }
  370. static void icside_dma_lost_irq(ide_drive_t *drive)
  371. {
  372. printk(KERN_ERR "%s: IRQ lost\n", drive->name);
  373. }
  374. static void icside_dma_init(ide_hwif_t *hwif)
  375. {
  376. printk(" %s: SG-DMA", hwif->name);
  377. hwif->atapi_dma = 1;
  378. hwif->mwdma_mask = 7; /* MW0..2 */
  379. hwif->swdma_mask = 7; /* SW0..2 */
  380. hwif->dmatable_cpu = NULL;
  381. hwif->dmatable_dma = 0;
  382. hwif->speedproc = icside_set_speed;
  383. hwif->autodma = 1;
  384. hwif->ide_dma_check = icside_dma_check;
  385. hwif->dma_host_off = icside_dma_host_off;
  386. hwif->dma_off_quietly = icside_dma_off_quietly;
  387. hwif->dma_host_on = icside_dma_host_on;
  388. hwif->ide_dma_on = icside_dma_on;
  389. hwif->dma_setup = icside_dma_setup;
  390. hwif->dma_exec_cmd = icside_dma_exec_cmd;
  391. hwif->dma_start = icside_dma_start;
  392. hwif->ide_dma_end = icside_dma_end;
  393. hwif->ide_dma_test_irq = icside_dma_test_irq;
  394. hwif->dma_timeout = icside_dma_timeout;
  395. hwif->dma_lost_irq = icside_dma_lost_irq;
  396. hwif->drives[0].autodma = hwif->autodma;
  397. hwif->drives[1].autodma = hwif->autodma;
  398. printk(" capable%s\n", hwif->autodma ? ", auto-enable" : "");
  399. }
  400. #else
  401. #define icside_dma_init(hwif) (0)
  402. #endif
  403. static ide_hwif_t *icside_find_hwif(unsigned long dataport)
  404. {
  405. ide_hwif_t *hwif;
  406. int index;
  407. for (index = 0; index < MAX_HWIFS; ++index) {
  408. hwif = &ide_hwifs[index];
  409. if (hwif->io_ports[IDE_DATA_OFFSET] == dataport)
  410. goto found;
  411. }
  412. for (index = 0; index < MAX_HWIFS; ++index) {
  413. hwif = &ide_hwifs[index];
  414. if (!hwif->io_ports[IDE_DATA_OFFSET])
  415. goto found;
  416. }
  417. hwif = NULL;
  418. found:
  419. return hwif;
  420. }
  421. static ide_hwif_t *
  422. icside_setup(void __iomem *base, struct cardinfo *info, struct expansion_card *ec)
  423. {
  424. unsigned long port = (unsigned long)base + info->dataoffset;
  425. ide_hwif_t *hwif;
  426. hwif = icside_find_hwif(port);
  427. if (hwif) {
  428. int i;
  429. memset(&hwif->hw, 0, sizeof(hw_regs_t));
  430. /*
  431. * Ensure we're using MMIO
  432. */
  433. default_hwif_mmiops(hwif);
  434. hwif->mmio = 1;
  435. for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
  436. hwif->hw.io_ports[i] = port;
  437. hwif->io_ports[i] = port;
  438. port += 1 << info->stepping;
  439. }
  440. hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
  441. hwif->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
  442. hwif->hw.irq = ec->irq;
  443. hwif->irq = ec->irq;
  444. hwif->noprobe = 0;
  445. hwif->chipset = ide_acorn;
  446. hwif->gendev.parent = &ec->dev;
  447. }
  448. return hwif;
  449. }
  450. static int __init
  451. icside_register_v5(struct icside_state *state, struct expansion_card *ec)
  452. {
  453. ide_hwif_t *hwif;
  454. void __iomem *base;
  455. base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
  456. if (!base)
  457. return -ENOMEM;
  458. state->irq_port = base;
  459. ec->irqaddr = base + ICS_ARCIN_V5_INTRSTAT;
  460. ec->irqmask = 1;
  461. ecard_setirq(ec, &icside_ops_arcin_v5, state);
  462. /*
  463. * Be on the safe side - disable interrupts
  464. */
  465. icside_irqdisable_arcin_v5(ec, 0);
  466. hwif = icside_setup(base, &icside_cardinfo_v5, ec);
  467. if (!hwif)
  468. return -ENODEV;
  469. state->hwif[0] = hwif;
  470. probe_hwif_init(hwif);
  471. ide_proc_register_port(hwif);
  472. return 0;
  473. }
  474. static int __init
  475. icside_register_v6(struct icside_state *state, struct expansion_card *ec)
  476. {
  477. ide_hwif_t *hwif, *mate;
  478. void __iomem *ioc_base, *easi_base;
  479. unsigned int sel = 0;
  480. int ret;
  481. ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
  482. if (!ioc_base) {
  483. ret = -ENOMEM;
  484. goto out;
  485. }
  486. easi_base = ioc_base;
  487. if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
  488. easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0);
  489. if (!easi_base) {
  490. ret = -ENOMEM;
  491. goto out;
  492. }
  493. /*
  494. * Enable access to the EASI region.
  495. */
  496. sel = 1 << 5;
  497. }
  498. writeb(sel, ioc_base);
  499. ecard_setirq(ec, &icside_ops_arcin_v6, state);
  500. state->irq_port = easi_base;
  501. state->ioc_base = ioc_base;
  502. /*
  503. * Be on the safe side - disable interrupts
  504. */
  505. icside_irqdisable_arcin_v6(ec, 0);
  506. /*
  507. * Find and register the interfaces.
  508. */
  509. hwif = icside_setup(easi_base, &icside_cardinfo_v6_1, ec);
  510. mate = icside_setup(easi_base, &icside_cardinfo_v6_2, ec);
  511. if (!hwif || !mate) {
  512. ret = -ENODEV;
  513. goto out;
  514. }
  515. state->hwif[0] = hwif;
  516. state->hwif[1] = mate;
  517. hwif->maskproc = icside_maskproc;
  518. hwif->channel = 0;
  519. hwif->hwif_data = state;
  520. hwif->mate = mate;
  521. hwif->serialized = 1;
  522. hwif->config_data = (unsigned long)ioc_base;
  523. hwif->select_data = sel;
  524. hwif->hw.dma = ec->dma;
  525. mate->maskproc = icside_maskproc;
  526. mate->channel = 1;
  527. mate->hwif_data = state;
  528. mate->mate = hwif;
  529. mate->serialized = 1;
  530. mate->config_data = (unsigned long)ioc_base;
  531. mate->select_data = sel | 1;
  532. mate->hw.dma = ec->dma;
  533. if (ec->dma != NO_DMA && !request_dma(ec->dma, hwif->name)) {
  534. icside_dma_init(hwif);
  535. icside_dma_init(mate);
  536. }
  537. probe_hwif_init(hwif);
  538. probe_hwif_init(mate);
  539. ide_proc_register_port(hwif);
  540. ide_proc_register_port(mate);
  541. return 0;
  542. out:
  543. return ret;
  544. }
  545. static int __devinit
  546. icside_probe(struct expansion_card *ec, const struct ecard_id *id)
  547. {
  548. struct icside_state *state;
  549. void __iomem *idmem;
  550. int ret;
  551. ret = ecard_request_resources(ec);
  552. if (ret)
  553. goto out;
  554. state = kzalloc(sizeof(struct icside_state), GFP_KERNEL);
  555. if (!state) {
  556. ret = -ENOMEM;
  557. goto release;
  558. }
  559. state->type = ICS_TYPE_NOTYPE;
  560. state->dev = &ec->dev;
  561. idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
  562. if (idmem) {
  563. unsigned int type;
  564. type = readb(idmem + ICS_IDENT_OFFSET) & 1;
  565. type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
  566. type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
  567. type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
  568. ecardm_iounmap(ec, idmem);
  569. state->type = type;
  570. }
  571. switch (state->type) {
  572. case ICS_TYPE_A3IN:
  573. dev_warn(&ec->dev, "A3IN unsupported\n");
  574. ret = -ENODEV;
  575. break;
  576. case ICS_TYPE_A3USER:
  577. dev_warn(&ec->dev, "A3USER unsupported\n");
  578. ret = -ENODEV;
  579. break;
  580. case ICS_TYPE_V5:
  581. ret = icside_register_v5(state, ec);
  582. break;
  583. case ICS_TYPE_V6:
  584. ret = icside_register_v6(state, ec);
  585. break;
  586. default:
  587. dev_warn(&ec->dev, "unknown interface type\n");
  588. ret = -ENODEV;
  589. break;
  590. }
  591. if (ret == 0) {
  592. ecard_set_drvdata(ec, state);
  593. goto out;
  594. }
  595. kfree(state);
  596. release:
  597. ecard_release_resources(ec);
  598. out:
  599. return ret;
  600. }
  601. static void __devexit icside_remove(struct expansion_card *ec)
  602. {
  603. struct icside_state *state = ecard_get_drvdata(ec);
  604. switch (state->type) {
  605. case ICS_TYPE_V5:
  606. /* FIXME: tell IDE to stop using the interface */
  607. /* Disable interrupts */
  608. icside_irqdisable_arcin_v5(ec, 0);
  609. break;
  610. case ICS_TYPE_V6:
  611. /* FIXME: tell IDE to stop using the interface */
  612. if (ec->dma != NO_DMA)
  613. free_dma(ec->dma);
  614. /* Disable interrupts */
  615. icside_irqdisable_arcin_v6(ec, 0);
  616. /* Reset the ROM pointer/EASI selection */
  617. writeb(0, state->ioc_base);
  618. break;
  619. }
  620. ecard_set_drvdata(ec, NULL);
  621. kfree(state);
  622. ecard_release_resources(ec);
  623. }
  624. static void icside_shutdown(struct expansion_card *ec)
  625. {
  626. struct icside_state *state = ecard_get_drvdata(ec);
  627. unsigned long flags;
  628. /*
  629. * Disable interrupts from this card. We need to do
  630. * this before disabling EASI since we may be accessing
  631. * this register via that region.
  632. */
  633. local_irq_save(flags);
  634. ec->ops->irqdisable(ec, 0);
  635. local_irq_restore(flags);
  636. /*
  637. * Reset the ROM pointer so that we can read the ROM
  638. * after a soft reboot. This also disables access to
  639. * the IDE taskfile via the EASI region.
  640. */
  641. if (state->ioc_base)
  642. writeb(0, state->ioc_base);
  643. }
  644. static const struct ecard_id icside_ids[] = {
  645. { MANU_ICS, PROD_ICS_IDE },
  646. { MANU_ICS2, PROD_ICS2_IDE },
  647. { 0xffff, 0xffff }
  648. };
  649. static struct ecard_driver icside_driver = {
  650. .probe = icside_probe,
  651. .remove = __devexit_p(icside_remove),
  652. .shutdown = icside_shutdown,
  653. .id_table = icside_ids,
  654. .drv = {
  655. .name = "icside",
  656. },
  657. };
  658. static int __init icside_init(void)
  659. {
  660. return ecard_register_driver(&icside_driver);
  661. }
  662. MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
  663. MODULE_LICENSE("GPL");
  664. MODULE_DESCRIPTION("ICS IDE driver");
  665. module_init(icside_init);