btmrvl_sdio.c 23.5 KB
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/**
 * Marvell BT-over-SDIO driver: SDIO interface related functions.
 *
 * Copyright (C) 2009, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 **/

#include <linux/firmware.h>
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#include <linux/slab.h>
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#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/sdio_func.h>
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#include <linux/module.h>
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#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "btmrvl_drv.h"
#include "btmrvl_sdio.h"

#define VERSION "1.0"

/* The btmrvl_sdio_remove() callback function is called
 * when user removes this module from kernel space or ejects
 * the card from the slot. The driver handles these 2 cases
 * differently.
 * If the user is removing the module, a MODULE_SHUTDOWN_REQ
 * command is sent to firmware and interrupt will be disabled.
 * If the card is removed, there is no need to send command
 * or disable interrupt.
 *
 * The variable 'user_rmmod' is used to distinguish these two
 * scenarios. This flag is initialized as FALSE in case the card
 * is removed, and will be set to TRUE for module removal when
 * module_exit function is called.
 */
static u8 user_rmmod;
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static u8 sdio_ireg;
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static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = {
	.cfg = 0x03,
	.host_int_mask = 0x04,
	.host_intstatus = 0x05,
	.card_status = 0x20,
	.sq_read_base_addr_a0 = 0x10,
	.sq_read_base_addr_a1 = 0x11,
	.card_fw_status0 = 0x40,
	.card_fw_status1 = 0x41,
	.card_rx_len = 0x42,
	.card_rx_unit = 0x43,
	.io_port_0 = 0x00,
	.io_port_1 = 0x01,
	.io_port_2 = 0x02,
};
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static const struct btmrvl_sdio_card_reg btmrvl_reg_87xx = {
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	.cfg = 0x00,
	.host_int_mask = 0x02,
	.host_intstatus = 0x03,
	.card_status = 0x30,
	.sq_read_base_addr_a0 = 0x40,
	.sq_read_base_addr_a1 = 0x41,
	.card_revision = 0x5c,
	.card_fw_status0 = 0x60,
	.card_fw_status1 = 0x61,
	.card_rx_len = 0x62,
	.card_rx_unit = 0x63,
	.io_port_0 = 0x78,
	.io_port_1 = 0x79,
	.io_port_2 = 0x7a,
};

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static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
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	.helper		= "sd8688_helper.bin",
	.firmware	= "sd8688.bin",
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	.reg		= &btmrvl_reg_8688,
	.sd_blksz_fw_dl	= 64,
};

static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
	.helper		= NULL,
	.firmware	= "mrvl/sd8787_uapsta.bin",
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	.reg		= &btmrvl_reg_87xx,
	.sd_blksz_fw_dl	= 256,
};

static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
	.helper		= NULL,
	.firmware	= "mrvl/sd8797_uapsta.bin",
	.reg		= &btmrvl_reg_87xx,
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	.sd_blksz_fw_dl	= 256,
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};

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static const struct sdio_device_id btmrvl_sdio_ids[] = {
	/* Marvell SD8688 Bluetooth device */
	{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
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			.driver_data = (unsigned long) &btmrvl_sdio_sd8688 },
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	/* Marvell SD8787 Bluetooth device */
	{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
			.driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
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	/* Marvell SD8797 Bluetooth device */
	{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A),
			.driver_data = (unsigned long) &btmrvl_sdio_sd8797 },
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	{ }	/* Terminating entry */
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};

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MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);

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static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
{
	u8 reg;
	int ret;

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	reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
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	if (!ret)
		card->rx_unit = reg;

	return ret;
}

static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
{
	u8 fws0, fws1;
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	int ret;
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	*dat = 0;

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	fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
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	if (ret)
		return -EIO;
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	fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
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	if (ret)
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		return -EIO;

	*dat = (((u16) fws1) << 8) | fws0;

	return 0;
}

static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
{
	u8 reg;
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	int ret;
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	reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
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	if (!ret)
		*dat = (u16) reg << card->rx_unit;

	return ret;
}

static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
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								u8 mask)
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{
	int ret;

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	sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
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	if (ret) {
		BT_ERR("Unable to enable the host interrupt!");
		ret = -EIO;
	}

	return ret;
}

static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
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								u8 mask)
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{
	u8 host_int_mask;
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	int ret;
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	host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
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	if (ret)
		return -EIO;
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	host_int_mask &= ~mask;

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	sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
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	if (ret < 0) {
		BT_ERR("Unable to disable the host interrupt!");
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		return -EIO;
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	}

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	return 0;
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}

static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
{
	unsigned int tries;
	u8 status;
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	int ret;
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	for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
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		status = sdio_readb(card->func, card->reg->card_status,	&ret);
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		if (ret)
			goto failed;
		if ((status & bits) == bits)
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			return ret;
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		udelay(1);
	}

	ret = -ETIMEDOUT;

failed:
	BT_ERR("FAILED! ret=%d", ret);

	return ret;
}

static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
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								int pollnum)
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{
	int ret = -ETIMEDOUT;
	u16 firmwarestat;
	unsigned int tries;

	 /* Wait for firmware to become ready */
	for (tries = 0; tries < pollnum; tries++) {
		if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
			continue;

		if (firmwarestat == FIRMWARE_READY) {
			ret = 0;
			break;
		} else {
			msleep(10);
		}
	}

	return ret;
}

static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
{
	const struct firmware *fw_helper = NULL;
	const u8 *helper = NULL;
	int ret;
	void *tmphlprbuf = NULL;
	int tmphlprbufsz, hlprblknow, helperlen;
	u8 *helperbuf;
	u32 tx_len;

	ret = request_firmware(&fw_helper, card->helper,
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						&card->func->dev);
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	if ((ret < 0) || !fw_helper) {
		BT_ERR("request_firmware(helper) failed, error code = %d",
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									ret);
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		ret = -ENOENT;
		goto done;
	}

	helper = fw_helper->data;
	helperlen = fw_helper->size;

	BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
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						helperlen, SDIO_BLOCK_SIZE);
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	tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);

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	tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
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	if (!tmphlprbuf) {
		BT_ERR("Unable to allocate buffer for helper."
			" Terminating download");
		ret = -ENOMEM;
		goto done;
	}

	helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);

	/* Perform helper data transfer */
	tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
			- SDIO_HEADER_LEN;
	hlprblknow = 0;

	do {
		ret = btmrvl_sdio_poll_card_status(card,
					    CARD_IO_READY | DN_LD_CARD_RDY);
		if (ret < 0) {
			BT_ERR("Helper download poll status timeout @ %d",
				hlprblknow);
			goto done;
		}

		/* Check if there is more data? */
		if (hlprblknow >= helperlen)
			break;

		if (helperlen - hlprblknow < tx_len)
			tx_len = helperlen - hlprblknow;

		/* Little-endian */
		helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
		helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
		helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
		helperbuf[3] = ((tx_len & 0xff000000) >> 24);

		memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
				tx_len);

		/* Now send the data */
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		ret = sdio_writesb(card->func, card->ioport, helperbuf,
				FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
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		if (ret < 0) {
			BT_ERR("IO error during helper download @ %d",
				hlprblknow);
			goto done;
		}

		hlprblknow += tx_len;
	} while (true);

	BT_DBG("Transferring helper image EOF block");

	memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);

	ret = sdio_writesb(card->func, card->ioport, helperbuf,
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							SDIO_BLOCK_SIZE);
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	if (ret < 0) {
		BT_ERR("IO error in writing helper image EOF block");
		goto done;
	}

	ret = 0;

done:
	kfree(tmphlprbuf);
	if (fw_helper)
		release_firmware(fw_helper);

	return ret;
}

static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
{
	const struct firmware *fw_firmware = NULL;
	const u8 *firmware = NULL;
	int firmwarelen, tmpfwbufsz, ret;
	unsigned int tries, offset;
	u8 base0, base1;
	void *tmpfwbuf = NULL;
	u8 *fwbuf;
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	u16 len, blksz_dl = card->sd_blksz_fw_dl;
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	int txlen = 0, tx_blocks = 0, count = 0;

	ret = request_firmware(&fw_firmware, card->firmware,
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							&card->func->dev);
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	if ((ret < 0) || !fw_firmware) {
		BT_ERR("request_firmware(firmware) failed, error code = %d",
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									ret);
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		ret = -ENOENT;
		goto done;
	}

	firmware = fw_firmware->data;
	firmwarelen = fw_firmware->size;

	BT_DBG("Downloading FW image (%d bytes)", firmwarelen);

	tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
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	tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
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	if (!tmpfwbuf) {
		BT_ERR("Unable to allocate buffer for firmware."
		       " Terminating download");
		ret = -ENOMEM;
		goto done;
	}

	/* Ensure aligned firmware buffer */
	fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);

	/* Perform firmware data transfer */
	offset = 0;
	do {
		ret = btmrvl_sdio_poll_card_status(card,
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					CARD_IO_READY | DN_LD_CARD_RDY);
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		if (ret < 0) {
			BT_ERR("FW download with helper poll status"
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						" timeout @ %d", offset);
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			goto done;
		}

		/* Check if there is more data ? */
		if (offset >= firmwarelen)
			break;

		for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
			base0 = sdio_readb(card->func,
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					card->reg->sq_read_base_addr_a0, &ret);
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			if (ret) {
				BT_ERR("BASE0 register read failed:"
					" base0 = 0x%04X(%d)."
					" Terminating download",
					base0, base0);
				ret = -EIO;
				goto done;
			}
			base1 = sdio_readb(card->func,
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					card->reg->sq_read_base_addr_a1, &ret);
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			if (ret) {
				BT_ERR("BASE1 register read failed:"
					" base1 = 0x%04X(%d)."
					" Terminating download",
					base1, base1);
				ret = -EIO;
				goto done;
			}

			len = (((u16) base1) << 8) | base0;
			if (len)
				break;

			udelay(10);
		}

		if (!len)
			break;
		else if (len > BTM_UPLD_SIZE) {
			BT_ERR("FW download failure @%d, invalid length %d",
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								offset, len);
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			ret = -EINVAL;
			goto done;
		}

		txlen = len;

		if (len & BIT(0)) {
			count++;
			if (count > MAX_WRITE_IOMEM_RETRY) {
				BT_ERR("FW download failure @%d, "
					"over max retry count", offset);
				ret = -EIO;
				goto done;
			}
			BT_ERR("FW CRC error indicated by the helper: "
				"len = 0x%04X, txlen = %d", len, txlen);
			len &= ~BIT(0);
			/* Set txlen to 0 so as to resend from same offset */
			txlen = 0;
		} else {
			count = 0;

			/* Last block ? */
			if (firmwarelen - offset < txlen)
				txlen = firmwarelen - offset;

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			tx_blocks = (txlen + blksz_dl - 1) / blksz_dl;
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			memcpy(fwbuf, &firmware[offset], txlen);
		}

		ret = sdio_writesb(card->func, card->ioport, fwbuf,
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						tx_blocks * blksz_dl);
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		if (ret < 0) {
			BT_ERR("FW download, writesb(%d) failed @%d",
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							count, offset);
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			sdio_writeb(card->func, HOST_CMD53_FIN,
						card->reg->cfg, &ret);
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			if (ret)
				BT_ERR("writeb failed (CFG)");
		}

		offset += txlen;
	} while (true);

	BT_DBG("FW download over, size %d bytes", offset);

	ret = 0;

done:
	kfree(tmpfwbuf);

	if (fw_firmware)
		release_firmware(fw_firmware);

	return ret;
}

static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
{
	u16 buf_len = 0;
	int ret, buf_block_len, blksz;
	struct sk_buff *skb = NULL;
	u32 type;
	u8 *payload = NULL;
	struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;

	if (!card || !card->func) {
		BT_ERR("card or function is NULL!");
		ret = -EINVAL;
		goto exit;
	}

	/* Read the length of data to be transferred */
	ret = btmrvl_sdio_read_rx_len(card, &buf_len);
	if (ret < 0) {
		BT_ERR("read rx_len failed");
		ret = -EIO;
		goto exit;
	}

	blksz = SDIO_BLOCK_SIZE;
	buf_block_len = (buf_len + blksz - 1) / blksz;

	if (buf_len <= SDIO_HEADER_LEN
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			|| (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
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		BT_ERR("invalid packet length: %d", buf_len);
		ret = -EINVAL;
		goto exit;
	}

	/* Allocate buffer */
	skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
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								GFP_ATOMIC);
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	if (skb == NULL) {
		BT_ERR("No free skb");
		goto exit;
	}

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	if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
		skb_put(skb, (unsigned long) skb->data &
					(BTSDIO_DMA_ALIGN - 1));
		skb_pull(skb, (unsigned long) skb->data &
					(BTSDIO_DMA_ALIGN - 1));
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	}

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	payload = skb->data;
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	ret = sdio_readsb(card->func, payload, card->ioport,
			  buf_block_len * blksz);
	if (ret < 0) {
		BT_ERR("readsb failed: %d", ret);
		ret = -EIO;
		goto exit;
	}

	/* This is SDIO specific header length: byte[2][1][0], type: byte[3]
	 * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
	 */

	buf_len = payload[0];
	buf_len |= (u16) payload[1] << 8;
	type = payload[3];

	switch (type) {
	case HCI_ACLDATA_PKT:
	case HCI_SCODATA_PKT:
	case HCI_EVENT_PKT:
		bt_cb(skb)->pkt_type = type;
		skb->dev = (void *)hdev;
		skb_put(skb, buf_len);
		skb_pull(skb, SDIO_HEADER_LEN);

		if (type == HCI_EVENT_PKT)
			btmrvl_check_evtpkt(priv, skb);

		hci_recv_frame(skb);
		hdev->stat.byte_rx += buf_len;
		break;

	case MRVL_VENDOR_PKT:
		bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
		skb->dev = (void *)hdev;
		skb_put(skb, buf_len);
		skb_pull(skb, SDIO_HEADER_LEN);

		if (btmrvl_process_event(priv, skb))
			hci_recv_frame(skb);

		hdev->stat.byte_rx += buf_len;
		break;

	default:
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		BT_ERR("Unknown packet type:%d", type);
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		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
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						blksz * buf_block_len);
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		kfree_skb(skb);
		skb = NULL;
		break;
	}

exit:
	if (ret) {
		hdev->stat.err_rx++;
		if (skb)
			kfree_skb(skb);
	}

	return ret;
}

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static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
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{
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	ulong flags;
	u8 ireg;
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	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;

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	spin_lock_irqsave(&priv->driver_lock, flags);
	ireg = sdio_ireg;
	sdio_ireg = 0;
	spin_unlock_irqrestore(&priv->driver_lock, flags);
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	sdio_claim_host(card->func);
	if (ireg & DN_LD_HOST_INT_STATUS) {
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		if (priv->btmrvl_dev.tx_dnld_rdy)
			BT_DBG("tx_done already received: "
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				" int_status=0x%x", ireg);
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		else
			priv->btmrvl_dev.tx_dnld_rdy = true;
	}

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	if (ireg & UP_LD_HOST_INT_STATUS)
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		btmrvl_sdio_card_to_host(priv);

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	sdio_release_host(card->func);
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	return 0;
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}

static void btmrvl_sdio_interrupt(struct sdio_func *func)
{
	struct btmrvl_private *priv;
	struct btmrvl_sdio_card *card;
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	ulong flags;
642
	u8 ireg = 0;
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	int ret;
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	card = sdio_get_drvdata(func);
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	if (!card || !card->priv) {
		BT_ERR("sbi_interrupt(%p) card or priv is "
				"NULL, card=%p\n", func, card);
		return;
	}
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	priv = card->priv;
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	ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
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	if (ret) {
		BT_ERR("sdio_readb: read int status register failed");
		return;
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	}
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	if (ireg != 0) {
		/*
		 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
		 * Clear the interrupt status register and re-enable the
		 * interrupt.
		 */
		BT_DBG("ireg = 0x%x", ireg);

		sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
					UP_LD_HOST_INT_STATUS),
670
				card->reg->host_intstatus, &ret);
671 672 673 674 675 676 677 678 679 680 681
		if (ret) {
			BT_ERR("sdio_writeb: clear int status register failed");
			return;
		}
	}

	spin_lock_irqsave(&priv->driver_lock, flags);
	sdio_ireg |= ireg;
	spin_unlock_irqrestore(&priv->driver_lock, flags);

	btmrvl_interrupt(priv);
682 683 684 685 686
}

static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
{
	struct sdio_func *func;
687 688
	u8 reg;
	int ret = 0;
689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720

	if (!card || !card->func) {
		BT_ERR("Error: card or function is NULL!");
		ret = -EINVAL;
		goto failed;
	}

	func = card->func;

	sdio_claim_host(func);

	ret = sdio_enable_func(func);
	if (ret) {
		BT_ERR("sdio_enable_func() failed: ret=%d", ret);
		ret = -EIO;
		goto release_host;
	}

	ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
	if (ret) {
		BT_ERR("sdio_claim_irq failed: ret=%d", ret);
		ret = -EIO;
		goto disable_func;
	}

	ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
	if (ret) {
		BT_ERR("cannot set SDIO block size");
		ret = -EIO;
		goto release_irq;
	}

721
	reg = sdio_readb(func, card->reg->io_port_0, &ret);
722 723 724 725 726 727 728
	if (ret < 0) {
		ret = -EIO;
		goto release_irq;
	}

	card->ioport = reg;

729
	reg = sdio_readb(func, card->reg->io_port_1, &ret);
730 731 732 733 734 735 736
	if (ret < 0) {
		ret = -EIO;
		goto release_irq;
	}

	card->ioport |= (reg << 8);

737
	reg = sdio_readb(func, card->reg->io_port_2, &ret);
738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782
	if (ret < 0) {
		ret = -EIO;
		goto release_irq;
	}

	card->ioport |= (reg << 16);

	BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);

	sdio_set_drvdata(func, card);

	sdio_release_host(func);

	return 0;

release_irq:
	sdio_release_irq(func);

disable_func:
	sdio_disable_func(func);

release_host:
	sdio_release_host(func);

failed:
	return ret;
}

static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
{
	if (card && card->func) {
		sdio_claim_host(card->func);
		sdio_release_irq(card->func);
		sdio_disable_func(card->func);
		sdio_release_host(card->func);
		sdio_set_drvdata(card->func, NULL);
	}

	return 0;
}

static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
{
	int ret;

783
	if (!card || !card->func)
784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
		return -EINVAL;

	sdio_claim_host(card->func);

	ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);

	btmrvl_sdio_get_rx_unit(card);

	sdio_release_host(card->func);

	return ret;
}

static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
{
	int ret;

801
	if (!card || !card->func)
802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830
		return -EINVAL;

	sdio_claim_host(card->func);

	ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);

	sdio_release_host(card->func);

	return ret;
}

static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
				u8 *payload, u16 nb)
{
	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
	int ret = 0;
	int buf_block_len;
	int blksz;
	int i = 0;
	u8 *buf = NULL;
	void *tmpbuf = NULL;
	int tmpbufsz;

	if (!card || !card->func) {
		BT_ERR("card or function is NULL!");
		return -EINVAL;
	}

	buf = payload;
831
	if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
832
		tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
833 834 835
		tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
		if (!tmpbuf)
			return -ENOMEM;
836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863
		buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
		memcpy(buf, payload, nb);
	}

	blksz = SDIO_BLOCK_SIZE;
	buf_block_len = (nb + blksz - 1) / blksz;

	sdio_claim_host(card->func);

	do {
		/* Transfer data to card */
		ret = sdio_writesb(card->func, card->ioport, buf,
				   buf_block_len * blksz);
		if (ret < 0) {
			i++;
			BT_ERR("i=%d writesb failed: %d", i, ret);
			print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
						payload, nb);
			ret = -EIO;
			if (i > MAX_WRITE_IOMEM_RETRY)
				goto exit;
		}
	} while (ret);

	priv->btmrvl_dev.tx_dnld_rdy = false;

exit:
	sdio_release_host(card->func);
864
	kfree(tmpbuf);
865 866 867 868 869 870 871

	return ret;
}

static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
{
	int ret = 0;
872 873
	u8 fws0;
	int pollnum = MAX_POLL_TRIES;
874 875 876 877 878 879 880 881 882 883 884 885

	if (!card || !card->func) {
		BT_ERR("card or function is NULL!");
		return -EINVAL;
	}
	sdio_claim_host(card->func);

	if (!btmrvl_sdio_verify_fw_download(card, 1)) {
		BT_DBG("Firmware already downloaded!");
		goto done;
	}

886 887
	/* Check if other function driver is downloading the firmware */
	fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
888
	if (ret) {
889
		BT_ERR("Failed to read FW downloading status!");
890 891 892
		ret = -EIO;
		goto done;
	}
893 894 895 896 897 898 899 900 901 902 903 904 905 906
	if (fws0) {
		BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);

		/* Give other function more time to download the firmware */
		pollnum *= 10;
	} else {
		if (card->helper) {
			ret = btmrvl_sdio_download_helper(card);
			if (ret) {
				BT_ERR("Failed to download helper!");
				ret = -EIO;
				goto done;
			}
		}
907

908 909 910 911 912
		if (btmrvl_sdio_download_fw_w_helper(card)) {
			BT_ERR("Failed to download firmware!");
			ret = -EIO;
			goto done;
		}
913 914
	}

915
	if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938
		BT_ERR("FW failed to be active in time!");
		ret = -ETIMEDOUT;
		goto done;
	}

done:
	sdio_release_host(card->func);

	return ret;
}

static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
{
	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
	int ret = 0;

	if (!card || !card->func) {
		BT_ERR("card or function is NULL!");
		return -EINVAL;
	}

	sdio_claim_host(card->func);

939
	sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
940 941 942 943 944 945 946 947 948

	sdio_release_host(card->func);

	BT_DBG("wake up firmware");

	return ret;
}

static int btmrvl_sdio_probe(struct sdio_func *func,
949
					const struct sdio_device_id *id)
950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
{
	int ret = 0;
	struct btmrvl_private *priv = NULL;
	struct btmrvl_sdio_card *card = NULL;

	BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
			id->vendor, id->device, id->class, func->num);

	card = kzalloc(sizeof(*card), GFP_KERNEL);
	if (!card) {
		ret = -ENOMEM;
		goto done;
	}

	card->func = func;

966 967
	if (id->driver_data) {
		struct btmrvl_sdio_device *data = (void *) id->driver_data;
968
		card->helper = data->helper;
969
		card->firmware = data->firmware;
970 971
		card->reg = data->reg;
		card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
972 973
	}

974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
	if (btmrvl_sdio_register_dev(card) < 0) {
		BT_ERR("Failed to register BT device!");
		ret = -ENODEV;
		goto free_card;
	}

	/* Disable the interrupts on the card */
	btmrvl_sdio_disable_host_int(card);

	if (btmrvl_sdio_download_fw(card)) {
		BT_ERR("Downloading firmware failed!");
		ret = -ENODEV;
		goto unreg_dev;
	}

	msleep(100);

	btmrvl_sdio_enable_host_int(card);

	priv = btmrvl_add_card(card);
	if (!priv) {
		BT_ERR("Initializing card failed!");
		ret = -ENODEV;
		goto disable_host_int;
	}

	card->priv = priv;

	/* Initialize the interface specific function pointers */
	priv->hw_host_to_card = btmrvl_sdio_host_to_card;
	priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
1005
	priv->hw_process_int_status = btmrvl_sdio_process_int_status;
1006

1007 1008 1009 1010 1011 1012
	if (btmrvl_register_hdev(priv)) {
		BT_ERR("Register hdev failed!");
		ret = -ENODEV;
		goto disable_host_int;
	}

1013 1014
	priv->btmrvl_dev.psmode = 1;
	btmrvl_enable_ps(priv);
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057

	return 0;

disable_host_int:
	btmrvl_sdio_disable_host_int(card);
unreg_dev:
	btmrvl_sdio_unregister_dev(card);
free_card:
	kfree(card);
done:
	return ret;
}

static void btmrvl_sdio_remove(struct sdio_func *func)
{
	struct btmrvl_sdio_card *card;

	if (func) {
		card = sdio_get_drvdata(func);
		if (card) {
			/* Send SHUTDOWN command & disable interrupt
			 * if user removes the module.
			 */
			if (user_rmmod) {
				btmrvl_send_module_cfg_cmd(card->priv,
							MODULE_SHUTDOWN_REQ);
				btmrvl_sdio_disable_host_int(card);
			}
			BT_DBG("unregester dev");
			btmrvl_sdio_unregister_dev(card);
			btmrvl_remove_card(card->priv);
			kfree(card);
		}
	}
}

static struct sdio_driver bt_mrvl_sdio = {
	.name		= "btmrvl_sdio",
	.id_table	= btmrvl_sdio_ids,
	.probe		= btmrvl_sdio_probe,
	.remove		= btmrvl_sdio_remove,
};

1058
static int __init btmrvl_sdio_init_module(void)
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
{
	if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
		BT_ERR("SDIO Driver Registration Failed");
		return -ENODEV;
	}

	/* Clear the flag in case user removes the card. */
	user_rmmod = 0;

	return 0;
}

1071
static void __exit btmrvl_sdio_exit_module(void)
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
{
	/* Set the flag as user is removing this module. */
	user_rmmod = 1;

	sdio_unregister_driver(&bt_mrvl_sdio);
}

module_init(btmrvl_sdio_init_module);
module_exit(btmrvl_sdio_exit_module);

MODULE_AUTHOR("Marvell International Ltd.");
1083
MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1084 1085
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL v2");
1086 1087
MODULE_FIRMWARE("sd8688_helper.bin");
MODULE_FIRMWARE("sd8688.bin");
1088
MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
1089
MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");