tifm_7xx1.c 11 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * tifm_7xx1.c - TI FlashMedia driver
  4. *
  5. * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
  6. */
  7. #include <linux/tifm.h>
  8. #include <linux/dma-mapping.h>
  9. #include <linux/module.h>
  10. #define DRIVER_NAME "tifm_7xx1"
  11. #define DRIVER_VERSION "0.8"
  12. #define TIFM_IRQ_ENABLE 0x80000000
  13. #define TIFM_IRQ_SOCKMASK(x) (x)
  14. #define TIFM_IRQ_CARDMASK(x) ((x) << 8)
  15. #define TIFM_IRQ_FIFOMASK(x) ((x) << 16)
  16. #define TIFM_IRQ_SETALL 0xffffffff
  17. static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm,
  18. struct tifm_dev *sock)
  19. {
  20. }
  21. static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
  22. {
  23. unsigned long flags;
  24. spin_lock_irqsave(&fm->lock, flags);
  25. fm->socket_change_set |= 1 << sock->socket_id;
  26. tifm_queue_work(&fm->media_switcher);
  27. spin_unlock_irqrestore(&fm->lock, flags);
  28. }
  29. static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
  30. {
  31. struct tifm_adapter *fm = dev_id;
  32. struct tifm_dev *sock;
  33. unsigned int irq_status, cnt;
  34. spin_lock(&fm->lock);
  35. irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
  36. if (irq_status == 0 || irq_status == (~0)) {
  37. spin_unlock(&fm->lock);
  38. return IRQ_NONE;
  39. }
  40. if (irq_status & TIFM_IRQ_ENABLE) {
  41. writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  42. for (cnt = 0; cnt < fm->num_sockets; cnt++) {
  43. sock = fm->sockets[cnt];
  44. if (sock) {
  45. if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1))
  46. sock->data_event(sock);
  47. if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1))
  48. sock->card_event(sock);
  49. }
  50. }
  51. fm->socket_change_set |= irq_status
  52. & ((1 << fm->num_sockets) - 1);
  53. }
  54. writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
  55. if (fm->finish_me)
  56. complete_all(fm->finish_me);
  57. else if (!fm->socket_change_set)
  58. writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
  59. else
  60. tifm_queue_work(&fm->media_switcher);
  61. spin_unlock(&fm->lock);
  62. return IRQ_HANDLED;
  63. }
  64. static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
  65. {
  66. unsigned int s_state;
  67. int cnt;
  68. writel(0x0e00, sock_addr + SOCK_CONTROL);
  69. for (cnt = 16; cnt <= 256; cnt <<= 1) {
  70. if (!(TIFM_SOCK_STATE_POWERED
  71. & readl(sock_addr + SOCK_PRESENT_STATE)))
  72. break;
  73. msleep(cnt);
  74. }
  75. s_state = readl(sock_addr + SOCK_PRESENT_STATE);
  76. if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
  77. return 0;
  78. writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
  79. sock_addr + SOCK_CONTROL);
  80. /* xd needs some extra time before power on */
  81. if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7)
  82. == TIFM_TYPE_XD)
  83. msleep(40);
  84. writel((s_state & TIFM_CTRL_POWER_MASK) | 0x0c00,
  85. sock_addr + SOCK_CONTROL);
  86. /* wait for power to stabilize */
  87. msleep(20);
  88. for (cnt = 16; cnt <= 256; cnt <<= 1) {
  89. if ((TIFM_SOCK_STATE_POWERED
  90. & readl(sock_addr + SOCK_PRESENT_STATE)))
  91. break;
  92. msleep(cnt);
  93. }
  94. writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
  95. sock_addr + SOCK_CONTROL);
  96. return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
  97. }
  98. inline static void tifm_7xx1_sock_power_off(char __iomem *sock_addr)
  99. {
  100. writel((~TIFM_CTRL_POWER_MASK) & readl(sock_addr + SOCK_CONTROL),
  101. sock_addr + SOCK_CONTROL);
  102. }
  103. inline static char __iomem *
  104. tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
  105. {
  106. return base_addr + ((sock_num + 1) << 10);
  107. }
  108. static void tifm_7xx1_switch_media(struct work_struct *work)
  109. {
  110. struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
  111. media_switcher);
  112. struct tifm_dev *sock;
  113. char __iomem *sock_addr;
  114. unsigned long flags;
  115. unsigned char media_id;
  116. unsigned int socket_change_set, cnt;
  117. spin_lock_irqsave(&fm->lock, flags);
  118. socket_change_set = fm->socket_change_set;
  119. fm->socket_change_set = 0;
  120. dev_dbg(fm->dev.parent, "checking media set %x\n",
  121. socket_change_set);
  122. if (!socket_change_set) {
  123. spin_unlock_irqrestore(&fm->lock, flags);
  124. return;
  125. }
  126. for (cnt = 0; cnt < fm->num_sockets; cnt++) {
  127. if (!(socket_change_set & (1 << cnt)))
  128. continue;
  129. sock = fm->sockets[cnt];
  130. if (sock) {
  131. printk(KERN_INFO
  132. "%s : demand removing card from socket %u:%u\n",
  133. dev_name(&fm->dev), fm->id, cnt);
  134. fm->sockets[cnt] = NULL;
  135. sock_addr = sock->addr;
  136. spin_unlock_irqrestore(&fm->lock, flags);
  137. device_unregister(&sock->dev);
  138. spin_lock_irqsave(&fm->lock, flags);
  139. tifm_7xx1_sock_power_off(sock_addr);
  140. writel(0x0e00, sock_addr + SOCK_CONTROL);
  141. }
  142. spin_unlock_irqrestore(&fm->lock, flags);
  143. media_id = tifm_7xx1_toggle_sock_power(
  144. tifm_7xx1_sock_addr(fm->addr, cnt));
  145. // tifm_alloc_device will check if media_id is valid
  146. sock = tifm_alloc_device(fm, cnt, media_id);
  147. if (sock) {
  148. sock->addr = tifm_7xx1_sock_addr(fm->addr, cnt);
  149. if (!device_register(&sock->dev)) {
  150. spin_lock_irqsave(&fm->lock, flags);
  151. if (!fm->sockets[cnt]) {
  152. fm->sockets[cnt] = sock;
  153. sock = NULL;
  154. }
  155. spin_unlock_irqrestore(&fm->lock, flags);
  156. }
  157. if (sock)
  158. tifm_free_device(&sock->dev);
  159. }
  160. spin_lock_irqsave(&fm->lock, flags);
  161. }
  162. writel(TIFM_IRQ_FIFOMASK(socket_change_set)
  163. | TIFM_IRQ_CARDMASK(socket_change_set),
  164. fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  165. writel(TIFM_IRQ_FIFOMASK(socket_change_set)
  166. | TIFM_IRQ_CARDMASK(socket_change_set),
  167. fm->addr + FM_SET_INTERRUPT_ENABLE);
  168. writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
  169. spin_unlock_irqrestore(&fm->lock, flags);
  170. }
  171. static int __maybe_unused tifm_7xx1_suspend(struct device *dev_d)
  172. {
  173. struct pci_dev *dev = to_pci_dev(dev_d);
  174. struct tifm_adapter *fm = pci_get_drvdata(dev);
  175. int cnt;
  176. dev_dbg(&dev->dev, "suspending host\n");
  177. for (cnt = 0; cnt < fm->num_sockets; cnt++) {
  178. if (fm->sockets[cnt])
  179. tifm_7xx1_sock_power_off(fm->sockets[cnt]->addr);
  180. }
  181. device_wakeup_disable(dev_d);
  182. return 0;
  183. }
  184. static int __maybe_unused tifm_7xx1_resume(struct device *dev_d)
  185. {
  186. struct pci_dev *dev = to_pci_dev(dev_d);
  187. struct tifm_adapter *fm = pci_get_drvdata(dev);
  188. int rc;
  189. unsigned long timeout;
  190. unsigned int good_sockets = 0, bad_sockets = 0;
  191. unsigned long flags;
  192. /* Maximum number of entries is 4 */
  193. unsigned char new_ids[4];
  194. DECLARE_COMPLETION_ONSTACK(finish_resume);
  195. if (WARN_ON(fm->num_sockets > ARRAY_SIZE(new_ids)))
  196. return -ENXIO;
  197. pci_set_master(dev);
  198. dev_dbg(&dev->dev, "resuming host\n");
  199. for (rc = 0; rc < fm->num_sockets; rc++)
  200. new_ids[rc] = tifm_7xx1_toggle_sock_power(
  201. tifm_7xx1_sock_addr(fm->addr, rc));
  202. spin_lock_irqsave(&fm->lock, flags);
  203. for (rc = 0; rc < fm->num_sockets; rc++) {
  204. if (fm->sockets[rc]) {
  205. if (fm->sockets[rc]->type == new_ids[rc])
  206. good_sockets |= 1 << rc;
  207. else
  208. bad_sockets |= 1 << rc;
  209. }
  210. }
  211. writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
  212. fm->addr + FM_SET_INTERRUPT_ENABLE);
  213. dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
  214. good_sockets, bad_sockets);
  215. fm->socket_change_set = 0;
  216. if (good_sockets) {
  217. fm->finish_me = &finish_resume;
  218. spin_unlock_irqrestore(&fm->lock, flags);
  219. timeout = wait_for_completion_timeout(&finish_resume, HZ);
  220. dev_dbg(&dev->dev, "wait returned %lu\n", timeout);
  221. writel(TIFM_IRQ_FIFOMASK(good_sockets)
  222. | TIFM_IRQ_CARDMASK(good_sockets),
  223. fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  224. writel(TIFM_IRQ_FIFOMASK(good_sockets)
  225. | TIFM_IRQ_CARDMASK(good_sockets),
  226. fm->addr + FM_SET_INTERRUPT_ENABLE);
  227. spin_lock_irqsave(&fm->lock, flags);
  228. fm->finish_me = NULL;
  229. fm->socket_change_set ^= good_sockets & fm->socket_change_set;
  230. }
  231. fm->socket_change_set |= bad_sockets;
  232. if (fm->socket_change_set)
  233. tifm_queue_work(&fm->media_switcher);
  234. spin_unlock_irqrestore(&fm->lock, flags);
  235. writel(TIFM_IRQ_ENABLE,
  236. fm->addr + FM_SET_INTERRUPT_ENABLE);
  237. return 0;
  238. }
  239. static int tifm_7xx1_dummy_has_ms_pif(struct tifm_adapter *fm,
  240. struct tifm_dev *sock)
  241. {
  242. return 0;
  243. }
  244. static int tifm_7xx1_has_ms_pif(struct tifm_adapter *fm, struct tifm_dev *sock)
  245. {
  246. if (((fm->num_sockets == 4) && (sock->socket_id == 2))
  247. || ((fm->num_sockets == 2) && (sock->socket_id == 0)))
  248. return 1;
  249. return 0;
  250. }
  251. static int tifm_7xx1_probe(struct pci_dev *dev,
  252. const struct pci_device_id *dev_id)
  253. {
  254. struct tifm_adapter *fm;
  255. int pci_dev_busy = 0;
  256. int rc;
  257. rc = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
  258. if (rc)
  259. return rc;
  260. rc = pci_enable_device(dev);
  261. if (rc)
  262. return rc;
  263. pci_set_master(dev);
  264. rc = pci_request_regions(dev, DRIVER_NAME);
  265. if (rc) {
  266. pci_dev_busy = 1;
  267. goto err_out;
  268. }
  269. pci_intx(dev, 1);
  270. fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM
  271. ? 4 : 2, &dev->dev);
  272. if (!fm) {
  273. rc = -ENOMEM;
  274. goto err_out_int;
  275. }
  276. INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
  277. fm->eject = tifm_7xx1_eject;
  278. fm->has_ms_pif = tifm_7xx1_has_ms_pif;
  279. pci_set_drvdata(dev, fm);
  280. fm->addr = pci_ioremap_bar(dev, 0);
  281. if (!fm->addr) {
  282. rc = -ENODEV;
  283. goto err_out_free;
  284. }
  285. rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm);
  286. if (rc)
  287. goto err_out_unmap;
  288. rc = tifm_add_adapter(fm);
  289. if (rc)
  290. goto err_out_irq;
  291. writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
  292. fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  293. writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
  294. fm->addr + FM_SET_INTERRUPT_ENABLE);
  295. return 0;
  296. err_out_irq:
  297. free_irq(dev->irq, fm);
  298. err_out_unmap:
  299. iounmap(fm->addr);
  300. err_out_free:
  301. tifm_free_adapter(fm);
  302. err_out_int:
  303. pci_intx(dev, 0);
  304. pci_release_regions(dev);
  305. err_out:
  306. if (!pci_dev_busy)
  307. pci_disable_device(dev);
  308. return rc;
  309. }
  310. static void tifm_7xx1_remove(struct pci_dev *dev)
  311. {
  312. struct tifm_adapter *fm = pci_get_drvdata(dev);
  313. int cnt;
  314. fm->eject = tifm_7xx1_dummy_eject;
  315. fm->has_ms_pif = tifm_7xx1_dummy_has_ms_pif;
  316. writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  317. free_irq(dev->irq, fm);
  318. tifm_remove_adapter(fm);
  319. for (cnt = 0; cnt < fm->num_sockets; cnt++)
  320. tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt));
  321. iounmap(fm->addr);
  322. pci_intx(dev, 0);
  323. pci_release_regions(dev);
  324. pci_disable_device(dev);
  325. tifm_free_adapter(fm);
  326. }
  327. static const struct pci_device_id tifm_7xx1_pci_tbl[] = {
  328. { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
  329. PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */
  330. { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
  331. PCI_ANY_ID, 0, 0, 0 },
  332. { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
  333. PCI_ANY_ID, 0, 0, 0 },
  334. { }
  335. };
  336. static SIMPLE_DEV_PM_OPS(tifm_7xx1_pm_ops, tifm_7xx1_suspend, tifm_7xx1_resume);
  337. static struct pci_driver tifm_7xx1_driver = {
  338. .name = DRIVER_NAME,
  339. .id_table = tifm_7xx1_pci_tbl,
  340. .probe = tifm_7xx1_probe,
  341. .remove = tifm_7xx1_remove,
  342. .driver.pm = &tifm_7xx1_pm_ops,
  343. };
  344. module_pci_driver(tifm_7xx1_driver);
  345. MODULE_AUTHOR("Alex Dubov");
  346. MODULE_DESCRIPTION("TI FlashMedia host driver");
  347. MODULE_LICENSE("GPL");
  348. MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
  349. MODULE_VERSION(DRIVER_VERSION);