From 2cc8689028cd077e3e9cb9a192b1bb524fe38935 Mon Sep 17 00:00:00 2001 From: Amitkumar Karwar Date: Tue, 1 Oct 2013 12:19:15 -0700 Subject: 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 Signed-off-by: Amitkumar Karwar Signed-off-by: Bing Zhao Signed-off-by: Hyuckjoo Lee Signed-off-by: Marcel Holtmann --- drivers/bluetooth/btmrvl_main.c | 116 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 116 insertions(+) (limited to 'drivers/bluetooth/btmrvl_main.c') diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c index e0ae1f4..6e7bd4e 100644 --- a/drivers/bluetooth/btmrvl_main.c +++ b/drivers/bluetooth/btmrvl_main.c @@ -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); -- cgit v1.1