2 * Marvell BT-over-SDIO driver: SDIO interface related functions.
4 * Copyright (C) 2009, Marvell International Ltd.
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.
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.
21 #include <linux/firmware.h>
23 #include <linux/mmc/sdio_ids.h>
24 #include <linux/mmc/sdio_func.h>
26 #include <net/bluetooth/bluetooth.h>
27 #include <net/bluetooth/hci_core.h>
29 #include "btmrvl_drv.h"
30 #include "btmrvl_sdio.h"
34 /* The btmrvl_sdio_remove() callback function is called
35 * when user removes this module from kernel space or ejects
36 * the card from the slot. The driver handles these 2 cases
38 * If the user is removing the module, a MODULE_SHUTDOWN_REQ
39 * command is sent to firmware and interrupt will be disabled.
40 * If the card is removed, there is no need to send command
41 * or disable interrupt.
43 * The variable 'user_rmmod' is used to distinguish these two
44 * scenarios. This flag is initialized as FALSE in case the card
45 * is removed, and will be set to TRUE for module removal when
46 * module_exit function is called.
50 static const struct btmrvl_sdio_device btmrvl_sdio_sd6888 = {
51 .helper = "sd8688_helper.bin",
52 .firmware = "sd8688.bin",
55 static const struct sdio_device_id btmrvl_sdio_ids[] = {
56 /* Marvell SD8688 Bluetooth device */
57 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
58 .driver_data = (unsigned long) &btmrvl_sdio_sd6888 },
60 { } /* Terminating entry */
63 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
65 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
70 reg = sdio_readb(card->func, CARD_RX_UNIT_REG, &ret);
77 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
84 fws0 = sdio_readb(card->func, CARD_FW_STATUS0_REG, &ret);
87 fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
92 *dat = (((u16) fws1) << 8) | fws0;
97 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
102 reg = sdio_readb(card->func, CARD_RX_LEN_REG, &ret);
104 *dat = (u16) reg << card->rx_unit;
109 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
114 sdio_writeb(card->func, mask, HOST_INT_MASK_REG, &ret);
116 BT_ERR("Unable to enable the host interrupt!");
123 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
129 host_int_mask = sdio_readb(card->func, HOST_INT_MASK_REG, &ret);
133 host_int_mask &= ~mask;
135 sdio_writeb(card->func, host_int_mask, HOST_INT_MASK_REG, &ret);
137 BT_ERR("Unable to disable the host interrupt!");
144 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
150 for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
151 status = sdio_readb(card->func, CARD_STATUS_REG, &ret);
154 if ((status & bits) == bits)
163 BT_ERR("FAILED! ret=%d", ret);
168 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
171 int ret = -ETIMEDOUT;
175 /* Wait for firmware to become ready */
176 for (tries = 0; tries < pollnum; tries++) {
177 if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
180 if (firmwarestat == FIRMWARE_READY) {
191 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
193 const struct firmware *fw_helper = NULL;
194 const u8 *helper = NULL;
196 void *tmphlprbuf = NULL;
197 int tmphlprbufsz, hlprblknow, helperlen;
201 ret = request_firmware(&fw_helper, card->helper,
203 if ((ret < 0) || !fw_helper) {
204 BT_ERR("request_firmware(helper) failed, error code = %d",
210 helper = fw_helper->data;
211 helperlen = fw_helper->size;
213 BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
214 helperlen, SDIO_BLOCK_SIZE);
216 tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
218 tmphlprbuf = kmalloc(tmphlprbufsz, GFP_KERNEL);
220 BT_ERR("Unable to allocate buffer for helper."
221 " Terminating download");
226 memset(tmphlprbuf, 0, tmphlprbufsz);
228 helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
230 /* Perform helper data transfer */
231 tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
236 ret = btmrvl_sdio_poll_card_status(card,
237 CARD_IO_READY | DN_LD_CARD_RDY);
239 BT_ERR("Helper download poll status timeout @ %d",
244 /* Check if there is more data? */
245 if (hlprblknow >= helperlen)
248 if (helperlen - hlprblknow < tx_len)
249 tx_len = helperlen - hlprblknow;
252 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
253 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
254 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
255 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
257 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
260 /* Now send the data */
261 ret = sdio_writesb(card->func, card->ioport, helperbuf,
262 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
264 BT_ERR("IO error during helper download @ %d",
269 hlprblknow += tx_len;
272 BT_DBG("Transferring helper image EOF block");
274 memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
276 ret = sdio_writesb(card->func, card->ioport, helperbuf,
279 BT_ERR("IO error in writing helper image EOF block");
288 release_firmware(fw_helper);
293 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
295 const struct firmware *fw_firmware = NULL;
296 const u8 *firmware = NULL;
297 int firmwarelen, tmpfwbufsz, ret;
298 unsigned int tries, offset;
300 void *tmpfwbuf = NULL;
303 int txlen = 0, tx_blocks = 0, count = 0;
305 ret = request_firmware(&fw_firmware, card->firmware,
307 if ((ret < 0) || !fw_firmware) {
308 BT_ERR("request_firmware(firmware) failed, error code = %d",
314 firmware = fw_firmware->data;
315 firmwarelen = fw_firmware->size;
317 BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
319 tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
320 tmpfwbuf = kmalloc(tmpfwbufsz, GFP_KERNEL);
322 BT_ERR("Unable to allocate buffer for firmware."
323 " Terminating download");
328 memset(tmpfwbuf, 0, tmpfwbufsz);
330 /* Ensure aligned firmware buffer */
331 fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
333 /* Perform firmware data transfer */
336 ret = btmrvl_sdio_poll_card_status(card,
337 CARD_IO_READY | DN_LD_CARD_RDY);
339 BT_ERR("FW download with helper poll status"
340 " timeout @ %d", offset);
344 /* Check if there is more data ? */
345 if (offset >= firmwarelen)
348 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
349 base0 = sdio_readb(card->func,
350 SQ_READ_BASE_ADDRESS_A0_REG, &ret);
352 BT_ERR("BASE0 register read failed:"
353 " base0 = 0x%04X(%d)."
354 " Terminating download",
359 base1 = sdio_readb(card->func,
360 SQ_READ_BASE_ADDRESS_A1_REG, &ret);
362 BT_ERR("BASE1 register read failed:"
363 " base1 = 0x%04X(%d)."
364 " Terminating download",
370 len = (((u16) base1) << 8) | base0;
379 else if (len > BTM_UPLD_SIZE) {
380 BT_ERR("FW download failure @%d, invalid length %d",
390 if (count > MAX_WRITE_IOMEM_RETRY) {
391 BT_ERR("FW download failure @%d, "
392 "over max retry count", offset);
396 BT_ERR("FW CRC error indicated by the helper: "
397 "len = 0x%04X, txlen = %d", len, txlen);
399 /* Set txlen to 0 so as to resend from same offset */
405 if (firmwarelen - offset < txlen)
406 txlen = firmwarelen - offset;
409 (txlen + SDIO_BLOCK_SIZE - 1) / SDIO_BLOCK_SIZE;
411 memcpy(fwbuf, &firmware[offset], txlen);
414 ret = sdio_writesb(card->func, card->ioport, fwbuf,
415 tx_blocks * SDIO_BLOCK_SIZE);
418 BT_ERR("FW download, writesb(%d) failed @%d",
420 sdio_writeb(card->func, HOST_CMD53_FIN, CONFIG_REG,
423 BT_ERR("writeb failed (CFG)");
429 BT_DBG("FW download over, size %d bytes", offset);
437 release_firmware(fw_firmware);
442 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
445 int ret, buf_block_len, blksz;
446 struct sk_buff *skb = NULL;
449 struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
450 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
452 if (!card || !card->func) {
453 BT_ERR("card or function is NULL!");
458 /* Read the length of data to be transferred */
459 ret = btmrvl_sdio_read_rx_len(card, &buf_len);
461 BT_ERR("read rx_len failed");
466 blksz = SDIO_BLOCK_SIZE;
467 buf_block_len = (buf_len + blksz - 1) / blksz;
469 if (buf_len <= SDIO_HEADER_LEN
470 || (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
471 BT_ERR("invalid packet length: %d", buf_len);
476 /* Allocate buffer */
477 skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
480 BT_ERR("No free skb");
484 if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
485 skb_put(skb, (unsigned long) skb->data &
486 (BTSDIO_DMA_ALIGN - 1));
487 skb_pull(skb, (unsigned long) skb->data &
488 (BTSDIO_DMA_ALIGN - 1));
493 ret = sdio_readsb(card->func, payload, card->ioport,
494 buf_block_len * blksz);
496 BT_ERR("readsb failed: %d", ret);
501 /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
502 * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
505 buf_len = payload[0];
506 buf_len |= (u16) payload[1] << 8;
510 case HCI_ACLDATA_PKT:
511 case HCI_SCODATA_PKT:
513 bt_cb(skb)->pkt_type = type;
514 skb->dev = (void *)hdev;
515 skb_put(skb, buf_len);
516 skb_pull(skb, SDIO_HEADER_LEN);
518 if (type == HCI_EVENT_PKT)
519 btmrvl_check_evtpkt(priv, skb);
522 hdev->stat.byte_rx += buf_len;
525 case MRVL_VENDOR_PKT:
526 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
527 skb->dev = (void *)hdev;
528 skb_put(skb, buf_len);
529 skb_pull(skb, SDIO_HEADER_LEN);
531 if (btmrvl_process_event(priv, skb))
534 hdev->stat.byte_rx += buf_len;
538 BT_ERR("Unknow packet type:%d", type);
539 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
540 blksz * buf_block_len);
557 static int btmrvl_sdio_get_int_status(struct btmrvl_private *priv, u8 * ireg)
561 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
565 sdio_ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret);
567 BT_ERR("sdio_readb: read int status register failed");
572 if (sdio_ireg != 0) {
574 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
575 * Clear the interrupt status register and re-enable the
578 BT_DBG("sdio_ireg = 0x%x", sdio_ireg);
580 sdio_writeb(card->func, ~(sdio_ireg) & (DN_LD_HOST_INT_STATUS |
581 UP_LD_HOST_INT_STATUS),
582 HOST_INTSTATUS_REG, &ret);
584 BT_ERR("sdio_writeb: clear int status register "
591 if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
592 if (priv->btmrvl_dev.tx_dnld_rdy)
593 BT_DBG("tx_done already received: "
594 " int_status=0x%x", sdio_ireg);
596 priv->btmrvl_dev.tx_dnld_rdy = true;
599 if (sdio_ireg & UP_LD_HOST_INT_STATUS)
600 btmrvl_sdio_card_to_host(priv);
610 static void btmrvl_sdio_interrupt(struct sdio_func *func)
612 struct btmrvl_private *priv;
613 struct hci_dev *hcidev;
614 struct btmrvl_sdio_card *card;
617 card = sdio_get_drvdata(func);
618 if (card && card->priv) {
620 hcidev = priv->btmrvl_dev.hcidev;
622 if (btmrvl_sdio_get_int_status(priv, &ireg))
623 BT_ERR("reading HOST_INT_STATUS_REG failed");
625 BT_DBG("HOST_INT_STATUS_REG %#x", ireg);
627 btmrvl_interrupt(priv);
631 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
633 struct sdio_func *func;
637 if (!card || !card->func) {
638 BT_ERR("Error: card or function is NULL!");
645 sdio_claim_host(func);
647 ret = sdio_enable_func(func);
649 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
654 ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
656 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
661 ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
663 BT_ERR("cannot set SDIO block size");
668 reg = sdio_readb(func, IO_PORT_0_REG, &ret);
676 reg = sdio_readb(func, IO_PORT_1_REG, &ret);
682 card->ioport |= (reg << 8);
684 reg = sdio_readb(func, IO_PORT_2_REG, &ret);
690 card->ioport |= (reg << 16);
692 BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
694 sdio_set_drvdata(func, card);
696 sdio_release_host(func);
701 sdio_release_irq(func);
704 sdio_disable_func(func);
707 sdio_release_host(func);
713 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
715 if (card && card->func) {
716 sdio_claim_host(card->func);
717 sdio_release_irq(card->func);
718 sdio_disable_func(card->func);
719 sdio_release_host(card->func);
720 sdio_set_drvdata(card->func, NULL);
726 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
730 if (!card || !card->func)
733 sdio_claim_host(card->func);
735 ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
737 btmrvl_sdio_get_rx_unit(card);
739 sdio_release_host(card->func);
744 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
748 if (!card || !card->func)
751 sdio_claim_host(card->func);
753 ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
755 sdio_release_host(card->func);
760 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
763 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
772 if (!card || !card->func) {
773 BT_ERR("card or function is NULL!");
778 if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
779 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
780 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
783 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
784 memcpy(buf, payload, nb);
787 blksz = SDIO_BLOCK_SIZE;
788 buf_block_len = (nb + blksz - 1) / blksz;
790 sdio_claim_host(card->func);
793 /* Transfer data to card */
794 ret = sdio_writesb(card->func, card->ioport, buf,
795 buf_block_len * blksz);
798 BT_ERR("i=%d writesb failed: %d", i, ret);
799 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
802 if (i > MAX_WRITE_IOMEM_RETRY)
807 priv->btmrvl_dev.tx_dnld_rdy = false;
810 sdio_release_host(card->func);
815 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
819 if (!card || !card->func) {
820 BT_ERR("card or function is NULL!");
823 sdio_claim_host(card->func);
825 if (!btmrvl_sdio_verify_fw_download(card, 1)) {
826 BT_DBG("Firmware already downloaded!");
830 ret = btmrvl_sdio_download_helper(card);
832 BT_ERR("Failed to download helper!");
837 if (btmrvl_sdio_download_fw_w_helper(card)) {
838 BT_ERR("Failed to download firmware!");
843 if (btmrvl_sdio_verify_fw_download(card, MAX_POLL_TRIES)) {
844 BT_ERR("FW failed to be active in time!");
850 sdio_release_host(card->func);
855 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
857 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
860 if (!card || !card->func) {
861 BT_ERR("card or function is NULL!");
865 sdio_claim_host(card->func);
867 sdio_writeb(card->func, HOST_POWER_UP, CONFIG_REG, &ret);
869 sdio_release_host(card->func);
871 BT_DBG("wake up firmware");
876 static int btmrvl_sdio_probe(struct sdio_func *func,
877 const struct sdio_device_id *id)
880 struct btmrvl_private *priv = NULL;
881 struct btmrvl_sdio_card *card = NULL;
883 BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
884 id->vendor, id->device, id->class, func->num);
886 card = kzalloc(sizeof(*card), GFP_KERNEL);
894 if (id->driver_data) {
895 struct btmrvl_sdio_device *data = (void *) id->driver_data;
896 card->helper = data->helper;
897 card->firmware = data->firmware;
900 if (btmrvl_sdio_register_dev(card) < 0) {
901 BT_ERR("Failed to register BT device!");
906 /* Disable the interrupts on the card */
907 btmrvl_sdio_disable_host_int(card);
909 if (btmrvl_sdio_download_fw(card)) {
910 BT_ERR("Downloading firmware failed!");
917 btmrvl_sdio_enable_host_int(card);
919 priv = btmrvl_add_card(card);
921 BT_ERR("Initializing card failed!");
923 goto disable_host_int;
928 /* Initialize the interface specific function pointers */
929 priv->hw_host_to_card = btmrvl_sdio_host_to_card;
930 priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
932 btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
937 btmrvl_sdio_disable_host_int(card);
939 btmrvl_sdio_unregister_dev(card);
946 static void btmrvl_sdio_remove(struct sdio_func *func)
948 struct btmrvl_sdio_card *card;
951 card = sdio_get_drvdata(func);
953 /* Send SHUTDOWN command & disable interrupt
954 * if user removes the module.
957 btmrvl_send_module_cfg_cmd(card->priv,
958 MODULE_SHUTDOWN_REQ);
959 btmrvl_sdio_disable_host_int(card);
961 BT_DBG("unregester dev");
962 btmrvl_sdio_unregister_dev(card);
963 btmrvl_remove_card(card->priv);
969 static struct sdio_driver bt_mrvl_sdio = {
970 .name = "btmrvl_sdio",
971 .id_table = btmrvl_sdio_ids,
972 .probe = btmrvl_sdio_probe,
973 .remove = btmrvl_sdio_remove,
976 static int btmrvl_sdio_init_module(void)
978 if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
979 BT_ERR("SDIO Driver Registration Failed");
983 /* Clear the flag in case user removes the card. */
989 static void btmrvl_sdio_exit_module(void)
991 /* Set the flag as user is removing this module. */
994 sdio_unregister_driver(&bt_mrvl_sdio);
997 module_init(btmrvl_sdio_init_module);
998 module_exit(btmrvl_sdio_exit_module);
1000 MODULE_AUTHOR("Marvell International Ltd.");
1001 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1002 MODULE_VERSION(VERSION);
1003 MODULE_LICENSE("GPL v2");