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btmrvl_sdio.c
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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>
#include <linux/slab.h>
#include <linux/suspend.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/sdio_func.h>
#include <linux/module.h>
#include <linux/devcoredump.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "btmrvl_drv.h"
#include "btmrvl_sdio.h"
#define VERSION "1.0"
static struct memory_type_mapping mem_type_mapping_tbl[] = {
{"ITCM", NULL, 0, 0xF0},
{"DTCM", NULL, 0, 0xF1},
{"SQRAM", NULL, 0, 0xF2},
{"APU", NULL, 0, 0xF3},
{"CIU", NULL, 0, 0xF4},
{"ICU", NULL, 0, 0xF5},
{"MAC", NULL, 0, 0xF6},
{"EXT7", NULL, 0, 0xF7},
{"EXT8", NULL, 0, 0xF8},
{"EXT9", NULL, 0, 0xF9},
{"EXT10", NULL, 0, 0xFA},
{"EXT11", NULL, 0, 0xFB},
{"EXT12", NULL, 0, 0xFC},
{"EXT13", NULL, 0, 0xFD},
{"EXTLAST", NULL, 0, 0xFE},
};
static const struct of_device_id btmrvl_sdio_of_match_table[] = {
{ .compatible = "marvell,sd8897-bt" },
{ .compatible = "marvell,sd8997-bt" },
{ }
};
static irqreturn_t btmrvl_wake_irq_bt(int irq, void *priv)
{
struct btmrvl_sdio_card *card = priv;
struct device *dev = &card->func->dev;
struct btmrvl_plt_wake_cfg *cfg = card->plt_wake_cfg;
dev_info(dev, "wake by bt\n");
cfg->wake_by_bt = true;
disable_irq_nosync(irq);
pm_wakeup_event(dev, 0);
pm_system_wakeup();
return IRQ_HANDLED;
}
/* This function parses device tree node using mmc subnode devicetree API.
* The device node is saved in card->plt_of_node.
* If the device tree node exists and includes interrupts attributes, this
* function will request platform specific wakeup interrupt.
*/
static int btmrvl_sdio_probe_of(struct device *dev,
struct btmrvl_sdio_card *card)
{
struct btmrvl_plt_wake_cfg *cfg;
int ret;
if (!dev->of_node ||
!of_match_node(btmrvl_sdio_of_match_table, dev->of_node)) {
dev_info(dev, "sdio device tree data not available\n");
return -1;
}
card->plt_of_node = dev->of_node;
card->plt_wake_cfg = devm_kzalloc(dev, sizeof(*card->plt_wake_cfg),
GFP_KERNEL);
cfg = card->plt_wake_cfg;
if (cfg && card->plt_of_node) {
cfg->irq_bt = irq_of_parse_and_map(card->plt_of_node, 0);
if (!cfg->irq_bt) {
dev_err(dev, "fail to parse irq_bt from device tree\n");
cfg->irq_bt = -1;
} else {
ret = devm_request_irq(dev, cfg->irq_bt,
btmrvl_wake_irq_bt,
0, "bt_wake", card);
if (ret) {
dev_err(dev,
"Failed to request irq_bt %d (%d)\n",
cfg->irq_bt, ret);
}
/* Configure wakeup (enabled by default) */
device_init_wakeup(dev, true);
disable_irq(cfg->irq_bt);
}
}
return 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;
static u8 sdio_ireg;
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,
.int_read_to_clear = false,
};
static const struct btmrvl_sdio_card_reg btmrvl_reg_87xx = {
.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,
.int_read_to_clear = false,
};
static const struct btmrvl_sdio_card_reg btmrvl_reg_8887 = {
.cfg = 0x00,
.host_int_mask = 0x08,
.host_intstatus = 0x0C,
.card_status = 0x5C,
.sq_read_base_addr_a0 = 0x6C,
.sq_read_base_addr_a1 = 0x6D,
.card_revision = 0xC8,
.card_fw_status0 = 0x88,
.card_fw_status1 = 0x89,
.card_rx_len = 0x8A,
.card_rx_unit = 0x8B,
.io_port_0 = 0xE4,
.io_port_1 = 0xE5,
.io_port_2 = 0xE6,
.int_read_to_clear = true,
.host_int_rsr = 0x04,
.card_misc_cfg = 0xD8,
};
static const struct btmrvl_sdio_card_reg btmrvl_reg_8897 = {
.cfg = 0x00,
.host_int_mask = 0x02,
.host_intstatus = 0x03,
.card_status = 0x50,
.sq_read_base_addr_a0 = 0x60,
.sq_read_base_addr_a1 = 0x61,
.card_revision = 0xbc,
.card_fw_status0 = 0xc0,
.card_fw_status1 = 0xc1,
.card_rx_len = 0xc2,
.card_rx_unit = 0xc3,
.io_port_0 = 0xd8,
.io_port_1 = 0xd9,
.io_port_2 = 0xda,
.int_read_to_clear = true,
.host_int_rsr = 0x01,
.card_misc_cfg = 0xcc,
.fw_dump_ctrl = 0xe2,
.fw_dump_start = 0xe3,
.fw_dump_end = 0xea,
};
static const struct btmrvl_sdio_card_reg btmrvl_reg_89xx = {
.cfg = 0x00,
.host_int_mask = 0x08,
.host_intstatus = 0x0c,
.card_status = 0x5c,
.sq_read_base_addr_a0 = 0xf8,
.sq_read_base_addr_a1 = 0xf9,
.card_revision = 0xc8,
.card_fw_status0 = 0xe8,
.card_fw_status1 = 0xe9,
.card_rx_len = 0xea,
.card_rx_unit = 0xeb,
.io_port_0 = 0xe4,
.io_port_1 = 0xe5,
.io_port_2 = 0xe6,
.int_read_to_clear = true,
.host_int_rsr = 0x04,
.card_misc_cfg = 0xd8,
.fw_dump_ctrl = 0xf0,
.fw_dump_start = 0xf1,
.fw_dump_end = 0xf8,
};
static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
.helper = "mrvl/sd8688_helper.bin",
.firmware = "mrvl/sd8688.bin",
.reg = &btmrvl_reg_8688,
.support_pscan_win_report = false,
.sd_blksz_fw_dl = 64,
.supports_fw_dump = false,
};
static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
.helper = NULL,
.firmware = "mrvl/sd8787_uapsta.bin",
.reg = &btmrvl_reg_87xx,
.support_pscan_win_report = false,
.sd_blksz_fw_dl = 256,
.supports_fw_dump = false,
};
static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
.helper = NULL,
.firmware = "mrvl/sd8797_uapsta.bin",
.reg = &btmrvl_reg_87xx,
.support_pscan_win_report = false,
.sd_blksz_fw_dl = 256,
.supports_fw_dump = false,
};
static const struct btmrvl_sdio_device btmrvl_sdio_sd8887 = {
.helper = NULL,
.firmware = "mrvl/sd8887_uapsta.bin",
.reg = &btmrvl_reg_8887,
.support_pscan_win_report = true,
.sd_blksz_fw_dl = 256,
.supports_fw_dump = false,
};
static const struct btmrvl_sdio_device btmrvl_sdio_sd8897 = {
.helper = NULL,
.firmware = "mrvl/sd8897_uapsta.bin",
.reg = &btmrvl_reg_8897,
.support_pscan_win_report = true,
.sd_blksz_fw_dl = 256,
.supports_fw_dump = true,
};
static const struct btmrvl_sdio_device btmrvl_sdio_sd8977 = {
.helper = NULL,
.firmware = "mrvl/sdsd8977_combo_v2.bin",
.reg = &btmrvl_reg_89xx,
.support_pscan_win_report = true,
.sd_blksz_fw_dl = 256,
.supports_fw_dump = true,
};
static const struct btmrvl_sdio_device btmrvl_sdio_sd8987 = {
.helper = NULL,
.firmware = "mrvl/sd8987_uapsta.bin",
.reg = &btmrvl_reg_89xx,
.support_pscan_win_report = true,
.sd_blksz_fw_dl = 256,
.supports_fw_dump = true,
};
static const struct btmrvl_sdio_device btmrvl_sdio_sd8997 = {
.helper = NULL,
.firmware = "mrvl/sdsd8997_combo_v4.bin",
.reg = &btmrvl_reg_89xx,
.support_pscan_win_report = true,
.sd_blksz_fw_dl = 256,
.supports_fw_dump = true,
};
static const struct sdio_device_id btmrvl_sdio_ids[] = {
/* Marvell SD8688 Bluetooth device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8688_BT),
.driver_data = (unsigned long)&btmrvl_sdio_sd8688 },
/* Marvell SD8787 Bluetooth device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787_BT),
.driver_data = (unsigned long)&btmrvl_sdio_sd8787 },
/* Marvell SD8787 Bluetooth AMP device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787_BT_AMP),
.driver_data = (unsigned long)&btmrvl_sdio_sd8787 },
/* Marvell SD8797 Bluetooth device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797_BT),
.driver_data = (unsigned long)&btmrvl_sdio_sd8797 },
/* Marvell SD8887 Bluetooth device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8887_BT),
.driver_data = (unsigned long)&btmrvl_sdio_sd8887 },
/* Marvell SD8897 Bluetooth device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897_BT),
.driver_data = (unsigned long)&btmrvl_sdio_sd8897 },
/* Marvell SD8977 Bluetooth device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8977_BT),
.driver_data = (unsigned long)&btmrvl_sdio_sd8977 },
/* Marvell SD8987 Bluetooth device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8987_BT),
.driver_data = (unsigned long)&btmrvl_sdio_sd8987 },
/* Marvell SD8997 Bluetooth device */
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8997_BT),
.driver_data = (unsigned long)&btmrvl_sdio_sd8997 },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
{
u8 reg;
int ret;
reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
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;
int ret;
*dat = 0;
fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
if (ret)
return -EIO;
fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
if (ret)
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;
int ret;
reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
if (!ret)
*dat = (u16) reg << card->rx_unit;
return ret;
}
static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
u8 mask)
{
int ret;
sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
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,
u8 mask)
{
u8 host_int_mask;
int ret;
host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
if (ret)
return -EIO;
host_int_mask &= ~mask;
sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
if (ret < 0) {
BT_ERR("Unable to disable the host interrupt!");
return -EIO;
}
return 0;
}
static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
{
unsigned int tries;
u8 status;
int ret;
for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
status = sdio_readb(card->func, card->reg->card_status, &ret);
if (ret)
goto failed;
if ((status & bits) == bits)
return ret;
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,
int pollnum)
{
u16 firmwarestat;
int tries, ret;
/* Wait for firmware to become ready */
for (tries = 0; tries < pollnum; tries++) {
sdio_claim_host(card->func);
ret = btmrvl_sdio_read_fw_status(card, &firmwarestat);
sdio_release_host(card->func);
if (ret < 0)
continue;
if (firmwarestat == FIRMWARE_READY)
return 0;
msleep(100);
}
return -ETIMEDOUT;
}
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,
&card->func->dev);
if ((ret < 0) || !fw_helper) {
BT_ERR("request_firmware(helper) failed, error code = %d",
ret);
ret = -ENOENT;
goto done;
}
helper = fw_helper->data;
helperlen = fw_helper->size;
BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
helperlen, SDIO_BLOCK_SIZE);
tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
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 */
ret = sdio_writesb(card->func, card->ioport, helperbuf,
FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
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,
SDIO_BLOCK_SIZE);
if (ret < 0) {
BT_ERR("IO error in writing helper image EOF block");
goto done;
}
ret = 0;
done:
kfree(tmphlprbuf);
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;
u16 len, blksz_dl = card->sd_blksz_fw_dl;
int txlen = 0, tx_blocks = 0, count = 0;
ret = request_firmware(&fw_firmware, card->firmware,
&card->func->dev);
if ((ret < 0) || !fw_firmware) {
BT_ERR("request_firmware(firmware) failed, error code = %d",
ret);
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);
tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
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,
CARD_IO_READY | DN_LD_CARD_RDY);
if (ret < 0) {
BT_ERR("FW download with helper poll status"
" timeout @ %d", offset);
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,
card->reg->sq_read_base_addr_a0, &ret);
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,
card->reg->sq_read_base_addr_a1, &ret);
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",
offset, len);
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;
tx_blocks = DIV_ROUND_UP(txlen, blksz_dl);
memcpy(fwbuf, &firmware[offset], txlen);
}
ret = sdio_writesb(card->func, card->ioport, fwbuf,
tx_blocks * blksz_dl);
if (ret < 0) {
BT_ERR("FW download, writesb(%d) failed @%d",
count, offset);
sdio_writeb(card->func, HOST_CMD53_FIN,
card->reg->cfg, &ret);
if (ret)
BT_ERR("writeb failed (CFG)");
}
offset += txlen;
} while (true);
BT_INFO("FW download over, size %d bytes", offset);
ret = 0;
done:
kfree(tmpfwbuf);
release_firmware(fw_firmware);
return ret;
}
static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
{
u16 buf_len = 0;
int ret, num_blocks, blksz;
struct sk_buff *skb = NULL;
u32 type;
u8 *payload;
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;
num_blocks = DIV_ROUND_UP(buf_len, blksz);
if (buf_len <= SDIO_HEADER_LEN
|| (num_blocks * blksz) > ALLOC_BUF_SIZE) {
BT_ERR("invalid packet length: %d", buf_len);
ret = -EINVAL;
goto exit;
}
/* Allocate buffer */
skb = bt_skb_alloc(num_blocks * blksz + BTSDIO_DMA_ALIGN, GFP_KERNEL);
if (!skb) {
BT_ERR("No free skb");
ret = -ENOMEM;
goto exit;
}
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));
}
payload = skb->data;
ret = sdio_readsb(card->func, payload, card->ioport,
num_blocks * 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 |= payload[1] << 8;
buf_len |= payload[2] << 16;
if (buf_len > blksz * num_blocks) {
BT_ERR("Skip incorrect packet: hdrlen %d buffer %d",
buf_len, blksz * num_blocks);
ret = -EIO;
goto exit;
}
type = payload[3];
switch (type) {
case HCI_ACLDATA_PKT:
case HCI_SCODATA_PKT:
case HCI_EVENT_PKT:
hci_skb_pkt_type(skb) = type;
skb_put(skb, buf_len);
skb_pull(skb, SDIO_HEADER_LEN);
if (type == HCI_EVENT_PKT) {
if (btmrvl_check_evtpkt(priv, skb))
hci_recv_frame(hdev, skb);
} else {
hci_recv_frame(hdev, skb);
}
hdev->stat.byte_rx += buf_len;
break;
case MRVL_VENDOR_PKT:
hci_skb_pkt_type(skb) = HCI_VENDOR_PKT;
skb_put(skb, buf_len);
skb_pull(skb, SDIO_HEADER_LEN);
if (btmrvl_process_event(priv, skb))
hci_recv_frame(hdev, skb);
hdev->stat.byte_rx += buf_len;
break;
default:
BT_ERR("Unknown packet type:%d", type);
BT_ERR("hex: %*ph", blksz * num_blocks, payload);
kfree_skb(skb);
skb = NULL;
break;
}
exit:
if (ret) {
hdev->stat.err_rx++;
kfree_skb(skb);
}
return ret;
}
static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
{
ulong flags;
u8 ireg;
struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
spin_lock_irqsave(&priv->driver_lock, flags);
ireg = sdio_ireg;
sdio_ireg = 0;
spin_unlock_irqrestore(&priv->driver_lock, flags);
sdio_claim_host(card->func);
if (ireg & DN_LD_HOST_INT_STATUS) {
if (priv->btmrvl_dev.tx_dnld_rdy)
BT_DBG("tx_done already received: "
" int_status=0x%x", ireg);
else
priv->btmrvl_dev.tx_dnld_rdy = true;
}
if (ireg & UP_LD_HOST_INT_STATUS)
btmrvl_sdio_card_to_host(priv);
sdio_release_host(card->func);
return 0;
}
static int btmrvl_sdio_read_to_clear(struct btmrvl_sdio_card *card, u8 *ireg)
{
struct btmrvl_adapter *adapter = card->priv->adapter;
int ret;
ret = sdio_readsb(card->func, adapter->hw_regs, 0, SDIO_BLOCK_SIZE);
if (ret) {
BT_ERR("sdio_readsb: read int hw_regs failed: %d", ret);
return ret;
}
*ireg = adapter->hw_regs[card->reg->host_intstatus];
BT_DBG("hw_regs[%#x]=%#x", card->reg->host_intstatus, *ireg);
return 0;
}
static int btmrvl_sdio_write_to_clear(struct btmrvl_sdio_card *card, u8 *ireg)
{
int ret;
*ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
if (ret) {
BT_ERR("sdio_readb: read int status failed: %d", ret);
return ret;
}
if (*ireg) {
/*
* DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
* Clear the interrupt status register and re-enable the
* interrupt.
*/
BT_DBG("int_status = 0x%x", *ireg);
sdio_writeb(card->func, ~(*ireg) & (DN_LD_HOST_INT_STATUS |
UP_LD_HOST_INT_STATUS),
card->reg->host_intstatus, &ret);
if (ret) {
BT_ERR("sdio_writeb: clear int status failed: %d", ret);
return ret;
}
}
return 0;
}
static void btmrvl_sdio_interrupt(struct sdio_func *func)
{
struct btmrvl_private *priv;
struct btmrvl_sdio_card *card;
ulong flags;
u8 ireg = 0;
int ret;
card = sdio_get_drvdata(func);
if (!card || !card->priv) {
BT_ERR("sbi_interrupt(%p) card or priv is NULL, card=%p",
func, card);
return;
}
priv = card->priv;
if (priv->surprise_removed)
return;
if (card->reg->int_read_to_clear)
ret = btmrvl_sdio_read_to_clear(card, &ireg);
else
ret = btmrvl_sdio_write_to_clear(card, &ireg);
if (ret)
return;
spin_lock_irqsave(&priv->driver_lock, flags);
sdio_ireg |= ireg;
spin_unlock_irqrestore(&priv->driver_lock, flags);
btmrvl_interrupt(priv);
}
static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
{
struct sdio_func *func;
u8 reg;
int ret;
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;
}
reg = sdio_readb(func, card->reg->io_port_0, &ret);
if (ret < 0) {
ret = -EIO;
goto release_irq;
}
card->ioport = reg;
reg = sdio_readb(func, card->reg->io_port_1, &ret);
if (ret < 0) {
ret = -EIO;
goto release_irq;
}
card->ioport |= (reg << 8);
reg = sdio_readb(func, card->reg->io_port_2, &ret);