btmrvl_sdio.c 26 KB

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  1. /**
  2. * Marvell BT-over-SDIO driver: SDIO interface related functions.
  3. *
  4. * Copyright (C) 2009, Marvell International Ltd.
  5. *
  6. * This software file (the "File") is distributed by Marvell International
  7. * Ltd. under the terms of the GNU General Public License Version 2, June 1991
  8. * (the "License"). You may use, redistribute and/or modify this File in
  9. * accordance with the terms and conditions of the License, a copy of which
  10. * is available by writing to the Free Software Foundation, Inc.,
  11. * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12. * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13. *
  14. *
  15. * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  16. * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  17. * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
  18. * this warranty disclaimer.
  19. **/
  20. #include <linux/firmware.h>
  21. #include <linux/slab.h>
  22. #include <linux/mmc/sdio_ids.h>
  23. #include <linux/mmc/sdio_func.h>
  24. #include <linux/module.h>
  25. #include <net/bluetooth/bluetooth.h>
  26. #include <net/bluetooth/hci_core.h>
  27. #include "btmrvl_drv.h"
  28. #include "btmrvl_sdio.h"
  29. #define VERSION "1.0"
  30. /* The btmrvl_sdio_remove() callback function is called
  31. * when user removes this module from kernel space or ejects
  32. * the card from the slot. The driver handles these 2 cases
  33. * differently.
  34. * If the user is removing the module, a MODULE_SHUTDOWN_REQ
  35. * command is sent to firmware and interrupt will be disabled.
  36. * If the card is removed, there is no need to send command
  37. * or disable interrupt.
  38. *
  39. * The variable 'user_rmmod' is used to distinguish these two
  40. * scenarios. This flag is initialized as FALSE in case the card
  41. * is removed, and will be set to TRUE for module removal when
  42. * module_exit function is called.
  43. */
  44. static u8 user_rmmod;
  45. static u8 sdio_ireg;
  46. static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = {
  47. .cfg = 0x03,
  48. .host_int_mask = 0x04,
  49. .host_intstatus = 0x05,
  50. .card_status = 0x20,
  51. .sq_read_base_addr_a0 = 0x10,
  52. .sq_read_base_addr_a1 = 0x11,
  53. .card_fw_status0 = 0x40,
  54. .card_fw_status1 = 0x41,
  55. .card_rx_len = 0x42,
  56. .card_rx_unit = 0x43,
  57. .io_port_0 = 0x00,
  58. .io_port_1 = 0x01,
  59. .io_port_2 = 0x02,
  60. };
  61. static const struct btmrvl_sdio_card_reg btmrvl_reg_87xx = {
  62. .cfg = 0x00,
  63. .host_int_mask = 0x02,
  64. .host_intstatus = 0x03,
  65. .card_status = 0x30,
  66. .sq_read_base_addr_a0 = 0x40,
  67. .sq_read_base_addr_a1 = 0x41,
  68. .card_revision = 0x5c,
  69. .card_fw_status0 = 0x60,
  70. .card_fw_status1 = 0x61,
  71. .card_rx_len = 0x62,
  72. .card_rx_unit = 0x63,
  73. .io_port_0 = 0x78,
  74. .io_port_1 = 0x79,
  75. .io_port_2 = 0x7a,
  76. };
  77. static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
  78. .helper = "mrvl/sd8688_helper.bin",
  79. .firmware = "mrvl/sd8688.bin",
  80. .reg = &btmrvl_reg_8688,
  81. .sd_blksz_fw_dl = 64,
  82. };
  83. static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
  84. .helper = NULL,
  85. .firmware = "mrvl/sd8787_uapsta.bin",
  86. .reg = &btmrvl_reg_87xx,
  87. .sd_blksz_fw_dl = 256,
  88. };
  89. static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
  90. .helper = NULL,
  91. .firmware = "mrvl/sd8797_uapsta.bin",
  92. .reg = &btmrvl_reg_87xx,
  93. .sd_blksz_fw_dl = 256,
  94. };
  95. static const struct sdio_device_id btmrvl_sdio_ids[] = {
  96. /* Marvell SD8688 Bluetooth device */
  97. { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
  98. .driver_data = (unsigned long) &btmrvl_sdio_sd8688 },
  99. /* Marvell SD8787 Bluetooth device */
  100. { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
  101. .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
  102. /* Marvell SD8787 Bluetooth AMP device */
  103. { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911B),
  104. .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
  105. /* Marvell SD8797 Bluetooth device */
  106. { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A),
  107. .driver_data = (unsigned long) &btmrvl_sdio_sd8797 },
  108. { } /* Terminating entry */
  109. };
  110. MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
  111. static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
  112. {
  113. u8 reg;
  114. int ret;
  115. reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
  116. if (!ret)
  117. card->rx_unit = reg;
  118. return ret;
  119. }
  120. static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
  121. {
  122. u8 fws0, fws1;
  123. int ret;
  124. *dat = 0;
  125. fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
  126. if (ret)
  127. return -EIO;
  128. fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
  129. if (ret)
  130. return -EIO;
  131. *dat = (((u16) fws1) << 8) | fws0;
  132. return 0;
  133. }
  134. static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
  135. {
  136. u8 reg;
  137. int ret;
  138. reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
  139. if (!ret)
  140. *dat = (u16) reg << card->rx_unit;
  141. return ret;
  142. }
  143. static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
  144. u8 mask)
  145. {
  146. int ret;
  147. sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
  148. if (ret) {
  149. BT_ERR("Unable to enable the host interrupt!");
  150. ret = -EIO;
  151. }
  152. return ret;
  153. }
  154. static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
  155. u8 mask)
  156. {
  157. u8 host_int_mask;
  158. int ret;
  159. host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
  160. if (ret)
  161. return -EIO;
  162. host_int_mask &= ~mask;
  163. sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
  164. if (ret < 0) {
  165. BT_ERR("Unable to disable the host interrupt!");
  166. return -EIO;
  167. }
  168. return 0;
  169. }
  170. static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
  171. {
  172. unsigned int tries;
  173. u8 status;
  174. int ret;
  175. for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
  176. status = sdio_readb(card->func, card->reg->card_status, &ret);
  177. if (ret)
  178. goto failed;
  179. if ((status & bits) == bits)
  180. return ret;
  181. udelay(1);
  182. }
  183. ret = -ETIMEDOUT;
  184. failed:
  185. BT_ERR("FAILED! ret=%d", ret);
  186. return ret;
  187. }
  188. static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
  189. int pollnum)
  190. {
  191. u16 firmwarestat;
  192. int tries, ret;
  193. /* Wait for firmware to become ready */
  194. for (tries = 0; tries < pollnum; tries++) {
  195. sdio_claim_host(card->func);
  196. ret = btmrvl_sdio_read_fw_status(card, &firmwarestat);
  197. sdio_release_host(card->func);
  198. if (ret < 0)
  199. continue;
  200. if (firmwarestat == FIRMWARE_READY)
  201. return 0;
  202. msleep(10);
  203. }
  204. return -ETIMEDOUT;
  205. }
  206. static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
  207. {
  208. const struct firmware *fw_helper = NULL;
  209. const u8 *helper = NULL;
  210. int ret;
  211. void *tmphlprbuf = NULL;
  212. int tmphlprbufsz, hlprblknow, helperlen;
  213. u8 *helperbuf;
  214. u32 tx_len;
  215. ret = request_firmware(&fw_helper, card->helper,
  216. &card->func->dev);
  217. if ((ret < 0) || !fw_helper) {
  218. BT_ERR("request_firmware(helper) failed, error code = %d",
  219. ret);
  220. ret = -ENOENT;
  221. goto done;
  222. }
  223. helper = fw_helper->data;
  224. helperlen = fw_helper->size;
  225. BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
  226. helperlen, SDIO_BLOCK_SIZE);
  227. tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
  228. tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
  229. if (!tmphlprbuf) {
  230. BT_ERR("Unable to allocate buffer for helper."
  231. " Terminating download");
  232. ret = -ENOMEM;
  233. goto done;
  234. }
  235. helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
  236. /* Perform helper data transfer */
  237. tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
  238. - SDIO_HEADER_LEN;
  239. hlprblknow = 0;
  240. do {
  241. ret = btmrvl_sdio_poll_card_status(card,
  242. CARD_IO_READY | DN_LD_CARD_RDY);
  243. if (ret < 0) {
  244. BT_ERR("Helper download poll status timeout @ %d",
  245. hlprblknow);
  246. goto done;
  247. }
  248. /* Check if there is more data? */
  249. if (hlprblknow >= helperlen)
  250. break;
  251. if (helperlen - hlprblknow < tx_len)
  252. tx_len = helperlen - hlprblknow;
  253. /* Little-endian */
  254. helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
  255. helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
  256. helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
  257. helperbuf[3] = ((tx_len & 0xff000000) >> 24);
  258. memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
  259. tx_len);
  260. /* Now send the data */
  261. ret = sdio_writesb(card->func, card->ioport, helperbuf,
  262. FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
  263. if (ret < 0) {
  264. BT_ERR("IO error during helper download @ %d",
  265. hlprblknow);
  266. goto done;
  267. }
  268. hlprblknow += tx_len;
  269. } while (true);
  270. BT_DBG("Transferring helper image EOF block");
  271. memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
  272. ret = sdio_writesb(card->func, card->ioport, helperbuf,
  273. SDIO_BLOCK_SIZE);
  274. if (ret < 0) {
  275. BT_ERR("IO error in writing helper image EOF block");
  276. goto done;
  277. }
  278. ret = 0;
  279. done:
  280. kfree(tmphlprbuf);
  281. release_firmware(fw_helper);
  282. return ret;
  283. }
  284. static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
  285. {
  286. const struct firmware *fw_firmware = NULL;
  287. const u8 *firmware = NULL;
  288. int firmwarelen, tmpfwbufsz, ret;
  289. unsigned int tries, offset;
  290. u8 base0, base1;
  291. void *tmpfwbuf = NULL;
  292. u8 *fwbuf;
  293. u16 len, blksz_dl = card->sd_blksz_fw_dl;
  294. int txlen = 0, tx_blocks = 0, count = 0;
  295. ret = request_firmware(&fw_firmware, card->firmware,
  296. &card->func->dev);
  297. if ((ret < 0) || !fw_firmware) {
  298. BT_ERR("request_firmware(firmware) failed, error code = %d",
  299. ret);
  300. ret = -ENOENT;
  301. goto done;
  302. }
  303. firmware = fw_firmware->data;
  304. firmwarelen = fw_firmware->size;
  305. BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
  306. tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
  307. tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
  308. if (!tmpfwbuf) {
  309. BT_ERR("Unable to allocate buffer for firmware."
  310. " Terminating download");
  311. ret = -ENOMEM;
  312. goto done;
  313. }
  314. /* Ensure aligned firmware buffer */
  315. fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
  316. /* Perform firmware data transfer */
  317. offset = 0;
  318. do {
  319. ret = btmrvl_sdio_poll_card_status(card,
  320. CARD_IO_READY | DN_LD_CARD_RDY);
  321. if (ret < 0) {
  322. BT_ERR("FW download with helper poll status"
  323. " timeout @ %d", offset);
  324. goto done;
  325. }
  326. /* Check if there is more data ? */
  327. if (offset >= firmwarelen)
  328. break;
  329. for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
  330. base0 = sdio_readb(card->func,
  331. card->reg->sq_read_base_addr_a0, &ret);
  332. if (ret) {
  333. BT_ERR("BASE0 register read failed:"
  334. " base0 = 0x%04X(%d)."
  335. " Terminating download",
  336. base0, base0);
  337. ret = -EIO;
  338. goto done;
  339. }
  340. base1 = sdio_readb(card->func,
  341. card->reg->sq_read_base_addr_a1, &ret);
  342. if (ret) {
  343. BT_ERR("BASE1 register read failed:"
  344. " base1 = 0x%04X(%d)."
  345. " Terminating download",
  346. base1, base1);
  347. ret = -EIO;
  348. goto done;
  349. }
  350. len = (((u16) base1) << 8) | base0;
  351. if (len)
  352. break;
  353. udelay(10);
  354. }
  355. if (!len)
  356. break;
  357. else if (len > BTM_UPLD_SIZE) {
  358. BT_ERR("FW download failure @%d, invalid length %d",
  359. offset, len);
  360. ret = -EINVAL;
  361. goto done;
  362. }
  363. txlen = len;
  364. if (len & BIT(0)) {
  365. count++;
  366. if (count > MAX_WRITE_IOMEM_RETRY) {
  367. BT_ERR("FW download failure @%d, "
  368. "over max retry count", offset);
  369. ret = -EIO;
  370. goto done;
  371. }
  372. BT_ERR("FW CRC error indicated by the helper: "
  373. "len = 0x%04X, txlen = %d", len, txlen);
  374. len &= ~BIT(0);
  375. /* Set txlen to 0 so as to resend from same offset */
  376. txlen = 0;
  377. } else {
  378. count = 0;
  379. /* Last block ? */
  380. if (firmwarelen - offset < txlen)
  381. txlen = firmwarelen - offset;
  382. tx_blocks = (txlen + blksz_dl - 1) / blksz_dl;
  383. memcpy(fwbuf, &firmware[offset], txlen);
  384. }
  385. ret = sdio_writesb(card->func, card->ioport, fwbuf,
  386. tx_blocks * blksz_dl);
  387. if (ret < 0) {
  388. BT_ERR("FW download, writesb(%d) failed @%d",
  389. count, offset);
  390. sdio_writeb(card->func, HOST_CMD53_FIN,
  391. card->reg->cfg, &ret);
  392. if (ret)
  393. BT_ERR("writeb failed (CFG)");
  394. }
  395. offset += txlen;
  396. } while (true);
  397. BT_DBG("FW download over, size %d bytes", offset);
  398. ret = 0;
  399. done:
  400. kfree(tmpfwbuf);
  401. release_firmware(fw_firmware);
  402. return ret;
  403. }
  404. static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
  405. {
  406. u16 buf_len = 0;
  407. int ret, num_blocks, blksz;
  408. struct sk_buff *skb = NULL;
  409. u32 type;
  410. u8 *payload = NULL;
  411. struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
  412. struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
  413. if (!card || !card->func) {
  414. BT_ERR("card or function is NULL!");
  415. ret = -EINVAL;
  416. goto exit;
  417. }
  418. /* Read the length of data to be transferred */
  419. ret = btmrvl_sdio_read_rx_len(card, &buf_len);
  420. if (ret < 0) {
  421. BT_ERR("read rx_len failed");
  422. ret = -EIO;
  423. goto exit;
  424. }
  425. blksz = SDIO_BLOCK_SIZE;
  426. num_blocks = DIV_ROUND_UP(buf_len, blksz);
  427. if (buf_len <= SDIO_HEADER_LEN
  428. || (num_blocks * blksz) > ALLOC_BUF_SIZE) {
  429. BT_ERR("invalid packet length: %d", buf_len);
  430. ret = -EINVAL;
  431. goto exit;
  432. }
  433. /* Allocate buffer */
  434. skb = bt_skb_alloc(num_blocks * blksz + BTSDIO_DMA_ALIGN, GFP_ATOMIC);
  435. if (skb == NULL) {
  436. BT_ERR("No free skb");
  437. goto exit;
  438. }
  439. if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
  440. skb_put(skb, (unsigned long) skb->data &
  441. (BTSDIO_DMA_ALIGN - 1));
  442. skb_pull(skb, (unsigned long) skb->data &
  443. (BTSDIO_DMA_ALIGN - 1));
  444. }
  445. payload = skb->data;
  446. ret = sdio_readsb(card->func, payload, card->ioport,
  447. num_blocks * blksz);
  448. if (ret < 0) {
  449. BT_ERR("readsb failed: %d", ret);
  450. ret = -EIO;
  451. goto exit;
  452. }
  453. /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
  454. * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
  455. */
  456. buf_len = payload[0];
  457. buf_len |= payload[1] << 8;
  458. buf_len |= payload[2] << 16;
  459. if (buf_len > blksz * num_blocks) {
  460. BT_ERR("Skip incorrect packet: hdrlen %d buffer %d",
  461. buf_len, blksz * num_blocks);
  462. ret = -EIO;
  463. goto exit;
  464. }
  465. type = payload[3];
  466. switch (type) {
  467. case HCI_ACLDATA_PKT:
  468. case HCI_SCODATA_PKT:
  469. case HCI_EVENT_PKT:
  470. bt_cb(skb)->pkt_type = type;
  471. skb->dev = (void *)hdev;
  472. skb_put(skb, buf_len);
  473. skb_pull(skb, SDIO_HEADER_LEN);
  474. if (type == HCI_EVENT_PKT) {
  475. if (btmrvl_check_evtpkt(priv, skb))
  476. hci_recv_frame(skb);
  477. } else {
  478. hci_recv_frame(skb);
  479. }
  480. hdev->stat.byte_rx += buf_len;
  481. break;
  482. case MRVL_VENDOR_PKT:
  483. bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
  484. skb->dev = (void *)hdev;
  485. skb_put(skb, buf_len);
  486. skb_pull(skb, SDIO_HEADER_LEN);
  487. if (btmrvl_process_event(priv, skb))
  488. hci_recv_frame(skb);
  489. hdev->stat.byte_rx += buf_len;
  490. break;
  491. default:
  492. BT_ERR("Unknown packet type:%d", type);
  493. BT_ERR("hex: %*ph", blksz * num_blocks, payload);
  494. kfree_skb(skb);
  495. skb = NULL;
  496. break;
  497. }
  498. exit:
  499. if (ret) {
  500. hdev->stat.err_rx++;
  501. kfree_skb(skb);
  502. }
  503. return ret;
  504. }
  505. static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
  506. {
  507. ulong flags;
  508. u8 ireg;
  509. struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
  510. spin_lock_irqsave(&priv->driver_lock, flags);
  511. ireg = sdio_ireg;
  512. sdio_ireg = 0;
  513. spin_unlock_irqrestore(&priv->driver_lock, flags);
  514. sdio_claim_host(card->func);
  515. if (ireg & DN_LD_HOST_INT_STATUS) {
  516. if (priv->btmrvl_dev.tx_dnld_rdy)
  517. BT_DBG("tx_done already received: "
  518. " int_status=0x%x", ireg);
  519. else
  520. priv->btmrvl_dev.tx_dnld_rdy = true;
  521. }
  522. if (ireg & UP_LD_HOST_INT_STATUS)
  523. btmrvl_sdio_card_to_host(priv);
  524. sdio_release_host(card->func);
  525. return 0;
  526. }
  527. static void btmrvl_sdio_interrupt(struct sdio_func *func)
  528. {
  529. struct btmrvl_private *priv;
  530. struct btmrvl_sdio_card *card;
  531. ulong flags;
  532. u8 ireg = 0;
  533. int ret;
  534. card = sdio_get_drvdata(func);
  535. if (!card || !card->priv) {
  536. BT_ERR("sbi_interrupt(%p) card or priv is "
  537. "NULL, card=%p\n", func, card);
  538. return;
  539. }
  540. priv = card->priv;
  541. ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
  542. if (ret) {
  543. BT_ERR("sdio_readb: read int status register failed");
  544. return;
  545. }
  546. if (ireg != 0) {
  547. /*
  548. * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
  549. * Clear the interrupt status register and re-enable the
  550. * interrupt.
  551. */
  552. BT_DBG("ireg = 0x%x", ireg);
  553. sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
  554. UP_LD_HOST_INT_STATUS),
  555. card->reg->host_intstatus, &ret);
  556. if (ret) {
  557. BT_ERR("sdio_writeb: clear int status register failed");
  558. return;
  559. }
  560. }
  561. spin_lock_irqsave(&priv->driver_lock, flags);
  562. sdio_ireg |= ireg;
  563. spin_unlock_irqrestore(&priv->driver_lock, flags);
  564. btmrvl_interrupt(priv);
  565. }
  566. static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
  567. {
  568. struct sdio_func *func;
  569. u8 reg;
  570. int ret = 0;
  571. if (!card || !card->func) {
  572. BT_ERR("Error: card or function is NULL!");
  573. ret = -EINVAL;
  574. goto failed;
  575. }
  576. func = card->func;
  577. sdio_claim_host(func);
  578. ret = sdio_enable_func(func);
  579. if (ret) {
  580. BT_ERR("sdio_enable_func() failed: ret=%d", ret);
  581. ret = -EIO;
  582. goto release_host;
  583. }
  584. ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
  585. if (ret) {
  586. BT_ERR("sdio_claim_irq failed: ret=%d", ret);
  587. ret = -EIO;
  588. goto disable_func;
  589. }
  590. ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
  591. if (ret) {
  592. BT_ERR("cannot set SDIO block size");
  593. ret = -EIO;
  594. goto release_irq;
  595. }
  596. reg = sdio_readb(func, card->reg->io_port_0, &ret);
  597. if (ret < 0) {
  598. ret = -EIO;
  599. goto release_irq;
  600. }
  601. card->ioport = reg;
  602. reg = sdio_readb(func, card->reg->io_port_1, &ret);
  603. if (ret < 0) {
  604. ret = -EIO;
  605. goto release_irq;
  606. }
  607. card->ioport |= (reg << 8);
  608. reg = sdio_readb(func, card->reg->io_port_2, &ret);
  609. if (ret < 0) {
  610. ret = -EIO;
  611. goto release_irq;
  612. }
  613. card->ioport |= (reg << 16);
  614. BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
  615. sdio_set_drvdata(func, card);
  616. sdio_release_host(func);
  617. return 0;
  618. release_irq:
  619. sdio_release_irq(func);
  620. disable_func:
  621. sdio_disable_func(func);
  622. release_host:
  623. sdio_release_host(func);
  624. failed:
  625. return ret;
  626. }
  627. static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
  628. {
  629. if (card && card->func) {
  630. sdio_claim_host(card->func);
  631. sdio_release_irq(card->func);
  632. sdio_disable_func(card->func);
  633. sdio_release_host(card->func);
  634. sdio_set_drvdata(card->func, NULL);
  635. }
  636. return 0;
  637. }
  638. static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
  639. {
  640. int ret;
  641. if (!card || !card->func)
  642. return -EINVAL;
  643. sdio_claim_host(card->func);
  644. ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
  645. btmrvl_sdio_get_rx_unit(card);
  646. sdio_release_host(card->func);
  647. return ret;
  648. }
  649. static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
  650. {
  651. int ret;
  652. if (!card || !card->func)
  653. return -EINVAL;
  654. sdio_claim_host(card->func);
  655. ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
  656. sdio_release_host(card->func);
  657. return ret;
  658. }
  659. static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
  660. u8 *payload, u16 nb)
  661. {
  662. struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
  663. int ret = 0;
  664. int buf_block_len;
  665. int blksz;
  666. int i = 0;
  667. u8 *buf = NULL;
  668. void *tmpbuf = NULL;
  669. int tmpbufsz;
  670. if (!card || !card->func) {
  671. BT_ERR("card or function is NULL!");
  672. return -EINVAL;
  673. }
  674. buf = payload;
  675. if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
  676. tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
  677. tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
  678. if (!tmpbuf)
  679. return -ENOMEM;
  680. buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
  681. memcpy(buf, payload, nb);
  682. }
  683. blksz = SDIO_BLOCK_SIZE;
  684. buf_block_len = (nb + blksz - 1) / blksz;
  685. sdio_claim_host(card->func);
  686. do {
  687. /* Transfer data to card */
  688. ret = sdio_writesb(card->func, card->ioport, buf,
  689. buf_block_len * blksz);
  690. if (ret < 0) {
  691. i++;
  692. BT_ERR("i=%d writesb failed: %d", i, ret);
  693. BT_ERR("hex: %*ph", nb, payload);
  694. ret = -EIO;
  695. if (i > MAX_WRITE_IOMEM_RETRY)
  696. goto exit;
  697. }
  698. } while (ret);
  699. priv->btmrvl_dev.tx_dnld_rdy = false;
  700. exit:
  701. sdio_release_host(card->func);
  702. kfree(tmpbuf);
  703. return ret;
  704. }
  705. static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
  706. {
  707. int ret;
  708. u8 fws0;
  709. int pollnum = MAX_POLL_TRIES;
  710. if (!card || !card->func) {
  711. BT_ERR("card or function is NULL!");
  712. return -EINVAL;
  713. }
  714. if (!btmrvl_sdio_verify_fw_download(card, 1)) {
  715. BT_DBG("Firmware already downloaded!");
  716. return 0;
  717. }
  718. sdio_claim_host(card->func);
  719. /* Check if other function driver is downloading the firmware */
  720. fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
  721. if (ret) {
  722. BT_ERR("Failed to read FW downloading status!");
  723. ret = -EIO;
  724. goto done;
  725. }
  726. if (fws0) {
  727. BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
  728. /* Give other function more time to download the firmware */
  729. pollnum *= 10;
  730. } else {
  731. if (card->helper) {
  732. ret = btmrvl_sdio_download_helper(card);
  733. if (ret) {
  734. BT_ERR("Failed to download helper!");
  735. ret = -EIO;
  736. goto done;
  737. }
  738. }
  739. if (btmrvl_sdio_download_fw_w_helper(card)) {
  740. BT_ERR("Failed to download firmware!");
  741. ret = -EIO;
  742. goto done;
  743. }
  744. }
  745. sdio_release_host(card->func);
  746. /*
  747. * winner or not, with this test the FW synchronizes when the
  748. * module can continue its initialization
  749. */
  750. if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
  751. BT_ERR("FW failed to be active in time!");
  752. return -ETIMEDOUT;
  753. }
  754. return 0;
  755. done:
  756. sdio_release_host(card->func);
  757. return ret;
  758. }
  759. static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
  760. {
  761. struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
  762. int ret = 0;
  763. if (!card || !card->func) {
  764. BT_ERR("card or function is NULL!");
  765. return -EINVAL;
  766. }
  767. sdio_claim_host(card->func);
  768. sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
  769. sdio_release_host(card->func);
  770. BT_DBG("wake up firmware");
  771. return ret;
  772. }
  773. static int btmrvl_sdio_probe(struct sdio_func *func,
  774. const struct sdio_device_id *id)
  775. {
  776. int ret = 0;
  777. struct btmrvl_private *priv = NULL;
  778. struct btmrvl_sdio_card *card = NULL;
  779. BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
  780. id->vendor, id->device, id->class, func->num);
  781. card = devm_kzalloc(&func->dev, sizeof(*card), GFP_KERNEL);
  782. if (!card)
  783. return -ENOMEM;
  784. card->func = func;
  785. if (id->driver_data) {
  786. struct btmrvl_sdio_device *data = (void *) id->driver_data;
  787. card->helper = data->helper;
  788. card->firmware = data->firmware;
  789. card->reg = data->reg;
  790. card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
  791. }
  792. if (btmrvl_sdio_register_dev(card) < 0) {
  793. BT_ERR("Failed to register BT device!");
  794. return -ENODEV;
  795. }
  796. /* Disable the interrupts on the card */
  797. btmrvl_sdio_disable_host_int(card);
  798. if (btmrvl_sdio_download_fw(card)) {
  799. BT_ERR("Downloading firmware failed!");
  800. ret = -ENODEV;
  801. goto unreg_dev;
  802. }
  803. btmrvl_sdio_enable_host_int(card);
  804. priv = btmrvl_add_card(card);
  805. if (!priv) {
  806. BT_ERR("Initializing card failed!");
  807. ret = -ENODEV;
  808. goto disable_host_int;
  809. }
  810. card->priv = priv;
  811. /* Initialize the interface specific function pointers */
  812. priv->hw_host_to_card = btmrvl_sdio_host_to_card;
  813. priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
  814. priv->hw_process_int_status = btmrvl_sdio_process_int_status;
  815. if (btmrvl_register_hdev(priv)) {
  816. BT_ERR("Register hdev failed!");
  817. ret = -ENODEV;
  818. goto disable_host_int;
  819. }
  820. priv->btmrvl_dev.psmode = 1;
  821. btmrvl_enable_ps(priv);
  822. priv->btmrvl_dev.gpio_gap = 0xffff;
  823. btmrvl_send_hscfg_cmd(priv);
  824. return 0;
  825. disable_host_int:
  826. btmrvl_sdio_disable_host_int(card);
  827. unreg_dev:
  828. btmrvl_sdio_unregister_dev(card);
  829. return ret;
  830. }
  831. static void btmrvl_sdio_remove(struct sdio_func *func)
  832. {
  833. struct btmrvl_sdio_card *card;
  834. if (func) {
  835. card = sdio_get_drvdata(func);
  836. if (card) {
  837. /* Send SHUTDOWN command & disable interrupt
  838. * if user removes the module.
  839. */
  840. if (user_rmmod) {
  841. btmrvl_send_module_cfg_cmd(card->priv,
  842. MODULE_SHUTDOWN_REQ);
  843. btmrvl_sdio_disable_host_int(card);
  844. }
  845. BT_DBG("unregester dev");
  846. btmrvl_sdio_unregister_dev(card);
  847. btmrvl_remove_card(card->priv);
  848. }
  849. }
  850. }
  851. static int btmrvl_sdio_suspend(struct device *dev)
  852. {
  853. struct sdio_func *func = dev_to_sdio_func(dev);
  854. struct btmrvl_sdio_card *card;
  855. struct btmrvl_private *priv;
  856. mmc_pm_flag_t pm_flags;
  857. struct hci_dev *hcidev;
  858. if (func) {
  859. pm_flags = sdio_get_host_pm_caps(func);
  860. BT_DBG("%s: suspend: PM flags = 0x%x", sdio_func_id(func),
  861. pm_flags);
  862. if (!(pm_flags & MMC_PM_KEEP_POWER)) {
  863. BT_ERR("%s: cannot remain alive while suspended",
  864. sdio_func_id(func));
  865. return -ENOSYS;
  866. }
  867. card = sdio_get_drvdata(func);
  868. if (!card || !card->priv) {
  869. BT_ERR("card or priv structure is not valid");
  870. return 0;
  871. }
  872. } else {
  873. BT_ERR("sdio_func is not specified");
  874. return 0;
  875. }
  876. priv = card->priv;
  877. if (priv->adapter->hs_state != HS_ACTIVATED) {
  878. if (btmrvl_enable_hs(priv)) {
  879. BT_ERR("HS not actived, suspend failed!");
  880. return -EBUSY;
  881. }
  882. }
  883. hcidev = priv->btmrvl_dev.hcidev;
  884. BT_DBG("%s: SDIO suspend", hcidev->name);
  885. hci_suspend_dev(hcidev);
  886. skb_queue_purge(&priv->adapter->tx_queue);
  887. priv->adapter->is_suspended = true;
  888. /* We will keep the power when hs enabled successfully */
  889. if (priv->adapter->hs_state == HS_ACTIVATED) {
  890. BT_DBG("suspend with MMC_PM_KEEP_POWER");
  891. return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
  892. } else {
  893. BT_DBG("suspend without MMC_PM_KEEP_POWER");
  894. return 0;
  895. }
  896. }
  897. static int btmrvl_sdio_resume(struct device *dev)
  898. {
  899. struct sdio_func *func = dev_to_sdio_func(dev);
  900. struct btmrvl_sdio_card *card;
  901. struct btmrvl_private *priv;
  902. mmc_pm_flag_t pm_flags;
  903. struct hci_dev *hcidev;
  904. if (func) {
  905. pm_flags = sdio_get_host_pm_caps(func);
  906. BT_DBG("%s: resume: PM flags = 0x%x", sdio_func_id(func),
  907. pm_flags);
  908. card = sdio_get_drvdata(func);
  909. if (!card || !card->priv) {
  910. BT_ERR("card or priv structure is not valid");
  911. return 0;
  912. }
  913. } else {
  914. BT_ERR("sdio_func is not specified");
  915. return 0;
  916. }
  917. priv = card->priv;
  918. if (!priv->adapter->is_suspended) {
  919. BT_DBG("device already resumed");
  920. return 0;
  921. }
  922. priv->adapter->is_suspended = false;
  923. hcidev = priv->btmrvl_dev.hcidev;
  924. BT_DBG("%s: SDIO resume", hcidev->name);
  925. hci_resume_dev(hcidev);
  926. priv->hw_wakeup_firmware(priv);
  927. priv->adapter->hs_state = HS_DEACTIVATED;
  928. BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name);
  929. return 0;
  930. }
  931. static const struct dev_pm_ops btmrvl_sdio_pm_ops = {
  932. .suspend = btmrvl_sdio_suspend,
  933. .resume = btmrvl_sdio_resume,
  934. };
  935. static struct sdio_driver bt_mrvl_sdio = {
  936. .name = "btmrvl_sdio",
  937. .id_table = btmrvl_sdio_ids,
  938. .probe = btmrvl_sdio_probe,
  939. .remove = btmrvl_sdio_remove,
  940. .drv = {
  941. .owner = THIS_MODULE,
  942. .pm = &btmrvl_sdio_pm_ops,
  943. }
  944. };
  945. static int __init btmrvl_sdio_init_module(void)
  946. {
  947. if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
  948. BT_ERR("SDIO Driver Registration Failed");
  949. return -ENODEV;
  950. }
  951. /* Clear the flag in case user removes the card. */
  952. user_rmmod = 0;
  953. return 0;
  954. }
  955. static void __exit btmrvl_sdio_exit_module(void)
  956. {
  957. /* Set the flag as user is removing this module. */
  958. user_rmmod = 1;
  959. sdio_unregister_driver(&bt_mrvl_sdio);
  960. }
  961. module_init(btmrvl_sdio_init_module);
  962. module_exit(btmrvl_sdio_exit_module);
  963. MODULE_AUTHOR("Marvell International Ltd.");
  964. MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
  965. MODULE_VERSION(VERSION);
  966. MODULE_LICENSE("GPL v2");
  967. MODULE_FIRMWARE("mrvl/sd8688_helper.bin");
  968. MODULE_FIRMWARE("mrvl/sd8688.bin");
  969. MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
  970. MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");