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Bluetooth: btmrvl: add calibration data download support 

A text file containing calibration data in hex format can
be provided at following path:

/lib/firmware/mrvl/sd8797_caldata.conf

The data will be downloaded to firmware during initialization.

Reviewed-by: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Hyuckjoo Lee <hyuckjoo.lee@samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Amitkumar Karwar 2013-10-01 12:19:15 -07:00 committed by Marcel Holtmann
parent 4b245722ca
commit 2cc8689028
4 changed files with 134 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/bluetooth/btmrvl_drv.h
View File

@ -23,6 +23,8 @@
#include <linux/bitops.h>
#include <linux/slab.h>
#include <net/bluetooth/bluetooth.h>
#include <linux/ctype.h>
#include <linux/firmware.h>
#define BTM_HEADER_LEN 4
#define BTM_UPLD_SIZE 2312
@ -41,6 +43,8 @@ struct btmrvl_thread {
struct btmrvl_device {
void *card;
struct hci_dev *hcidev;
struct device *dev;
const char *cal_data;
u8 dev_type;
@ -91,6 +95,7 @@ struct btmrvl_private {
#define BT_CMD_HOST_SLEEP_CONFIG 0x59
#define BT_CMD_HOST_SLEEP_ENABLE 0x5A
#define BT_CMD_MODULE_CFG_REQ 0x5B
#define BT_CMD_LOAD_CONFIG_DATA 0x61
/* Sub-commands: Module Bringup/Shutdown Request/Response */
#define MODULE_BRINGUP_REQ 0xF1
@ -116,6 +121,9 @@ struct btmrvl_private {
#define PS_SLEEP 0x01
#define PS_AWAKE 0x00
#define BT_CMD_DATA_SIZE 32
#define BT_CAL_DATA_SIZE 28
struct btmrvl_event {
u8 ec; /* event counter */
u8 length;

116
drivers/bluetooth/btmrvl_main.c
View File

@ -432,12 +432,128 @@ static int btmrvl_open(struct hci_dev *hdev)
return 0;
}
/*
* This function parses provided calibration data input. It should contain
* hex bytes separated by space or new line character. Here is an example.
* 00 1C 01 37 FF FF FF FF 02 04 7F 01
* CE BA 00 00 00 2D C6 C0 00 00 00 00
* 00 F0 00 00
*/
static int btmrvl_parse_cal_cfg(const u8 *src, u32 len, u8 *dst, u32 dst_size)
{
const u8 *s = src;
u8 *d = dst;
int ret;
u8 tmp[3];
tmp[2] = '\0';
while ((s - src) <= len - 2) {
if (isspace(*s)) {
s++;
continue;
}
if (isxdigit(*s)) {
if ((d - dst) >= dst_size) {
BT_ERR("calibration data file too big!!!");
return -EINVAL;
}
memcpy(tmp, s, 2);
ret = kstrtou8(tmp, 16, d++);
if (ret < 0)
return ret;
s += 2;
} else {
return -EINVAL;
}
}
if (d == dst)
return -EINVAL;
return 0;
}
static int btmrvl_load_cal_data(struct btmrvl_private *priv,
u8 *config_data)
{
int i, ret;
u8 data[BT_CMD_DATA_SIZE];
data[0] = 0x00;
data[1] = 0x00;
data[2] = 0x00;
data[3] = BT_CMD_DATA_SIZE - 4;
/* Swap cal-data bytes. Each four bytes are swapped. Considering 4
* byte SDIO header offset, mapping of input and output bytes will be
* {3, 2, 1, 0} -> {0+4, 1+4, 2+4, 3+4},
* {7, 6, 5, 4} -> {4+4, 5+4, 6+4, 7+4} */
for (i = 4; i < BT_CMD_DATA_SIZE; i++)
data[i] = config_data[(i / 4) * 8 - 1 - i];
print_hex_dump_bytes("Calibration data: ",
DUMP_PREFIX_OFFSET, data, BT_CMD_DATA_SIZE);
ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
BT_CMD_DATA_SIZE);
if (ret)
BT_ERR("Failed to download caibration data\n");
return 0;
}
static int
btmrvl_process_cal_cfg(struct btmrvl_private *priv, u8 *data, u32 size)
{
u8 cal_data[BT_CAL_DATA_SIZE];
int ret;
ret = btmrvl_parse_cal_cfg(data, size, cal_data, sizeof(cal_data));
if (ret)
return ret;
ret = btmrvl_load_cal_data(priv, cal_data);
if (ret) {
BT_ERR("Fail to load calibrate data");
return ret;
}
return 0;
}
static int btmrvl_cal_data_config(struct btmrvl_private *priv)
{
const struct firmware *cfg;
int ret;
const char *cal_data = priv->btmrvl_dev.cal_data;
if (!cal_data)
return 0;
ret = request_firmware(&cfg, cal_data, priv->btmrvl_dev.dev);
if (ret < 0) {
BT_DBG("Failed to get %s file, skipping cal data download",
cal_data);
return 0;
}
ret = btmrvl_process_cal_cfg(priv, (u8 *)cfg->data, cfg->size);
release_firmware(cfg);
return ret;
}
static int btmrvl_setup(struct hci_dev *hdev)
{
struct btmrvl_private *priv = hci_get_drvdata(hdev);
btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
if (btmrvl_cal_data_config(priv))
BT_ERR("Set cal data failed");
priv->btmrvl_dev.psmode = 1;
btmrvl_enable_ps(priv);

9
drivers/bluetooth/btmrvl_sdio.c
View File

@ -18,7 +18,6 @@
* this warranty disclaimer.
**/
#include <linux/firmware.h>
#include <linux/slab.h>
#include <linux/mmc/sdio_ids.h>
@ -102,6 +101,7 @@ static const struct btmrvl_sdio_card_reg btmrvl_reg_88xx = {
static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
.helper = "mrvl/sd8688_helper.bin",
.firmware = "mrvl/sd8688.bin",
.cal_data = NULL,
.reg = &btmrvl_reg_8688,
.sd_blksz_fw_dl = 64,
};
@ -109,6 +109,7 @@ static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
.helper = NULL,
.firmware = "mrvl/sd8787_uapsta.bin",
.cal_data = NULL,
.reg = &btmrvl_reg_87xx,
.sd_blksz_fw_dl = 256,
};
@ -116,6 +117,7 @@ static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
.helper = NULL,
.firmware = "mrvl/sd8797_uapsta.bin",
.cal_data = "mrvl/sd8797_caldata.conf",
.reg = &btmrvl_reg_87xx,
.sd_blksz_fw_dl = 256,
};
@ -123,6 +125,7 @@ static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
static const struct btmrvl_sdio_device btmrvl_sdio_sd8897 = {
.helper = NULL,
.firmware = "mrvl/sd8897_uapsta.bin",
.cal_data = NULL,
.reg = &btmrvl_reg_88xx,
.sd_blksz_fw_dl = 256,
};
@ -1006,6 +1009,7 @@ static int btmrvl_sdio_probe(struct sdio_func *func,
struct btmrvl_sdio_device *data = (void *) id->driver_data;
card->helper = data->helper;
card->firmware = data->firmware;
card->cal_data = data->cal_data;
card->reg = data->reg;
card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
}
@ -1034,6 +1038,8 @@ static int btmrvl_sdio_probe(struct sdio_func *func,
}
card->priv = priv;
priv->btmrvl_dev.dev = &card->func->dev;
priv->btmrvl_dev.cal_data = card->cal_data;
/* Initialize the interface specific function pointers */
priv->hw_host_to_card = btmrvl_sdio_host_to_card;
@ -1216,4 +1222,5 @@ MODULE_FIRMWARE("mrvl/sd8688_helper.bin");
MODULE_FIRMWARE("mrvl/sd8688.bin");
MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");
MODULE_FIRMWARE("mrvl/sd8797_caldata.conf");
MODULE_FIRMWARE("mrvl/sd8897_uapsta.bin");

2
drivers/bluetooth/btmrvl_sdio.h
View File

@ -85,6 +85,7 @@ struct btmrvl_sdio_card {
u32 ioport;
const char *helper;
const char *firmware;
const char *cal_data;
const struct btmrvl_sdio_card_reg *reg;
u16 sd_blksz_fw_dl;
u8 rx_unit;
@ -94,6 +95,7 @@ struct btmrvl_sdio_card {
struct btmrvl_sdio_device {
const char *helper;
const char *firmware;
const char *cal_data;
const struct btmrvl_sdio_card_reg *reg;
u16 sd_blksz_fw_dl;
};