From 8a4934f1d62b8be7a00cdb4e65124f4d02d412f3 Mon Sep 17 00:00:00 2001 From: Bing Zhao Date: Fri, 1 Nov 2013 15:28:25 -0700 Subject: [PATCH] Bluetooth: btmrvl: remove cal-data byte swapping and redundant mem copy The device tree property can define the cal-data in proper order. There is no need to swap the bytes in driver. Also remove the redundant cal-data memory copy after removing the byte swapping. Cc: Mike Frysinger Cc: Amitkumar Karwar Signed-off-by: Bing Zhao Signed-off-by: Hyuckjoo Lee Signed-off-by: Marcel Holtmann --- drivers/bluetooth/btmrvl_drv.h | 2 +- drivers/bluetooth/btmrvl_main.c | 27 ++++++++++----------------- 2 files changed, 11 insertions(+), 18 deletions(-) diff --git a/drivers/bluetooth/btmrvl_drv.h b/drivers/bluetooth/btmrvl_drv.h index 98187f09393d..7399303d7d99 100644 --- a/drivers/bluetooth/btmrvl_drv.h +++ b/drivers/bluetooth/btmrvl_drv.h @@ -120,7 +120,7 @@ struct btmrvl_private { #define PS_SLEEP 0x01 #define PS_AWAKE 0x00 -#define BT_CMD_DATA_SIZE 32 +#define BT_CAL_HDR_LEN 4 #define BT_CAL_DATA_SIZE 28 struct btmrvl_event { diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c index 6441f724aeb0..1e0320af00c6 100644 --- a/drivers/bluetooth/btmrvl_main.c +++ b/drivers/bluetooth/btmrvl_main.c @@ -415,28 +415,20 @@ static int btmrvl_open(struct hci_dev *hdev) } static int btmrvl_download_cal_data(struct btmrvl_private *priv, - u8 *config_data) + u8 *data, int len) { - int i, ret; - u8 data[BT_CMD_DATA_SIZE]; + int ret; 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]; + data[3] = len; print_hex_dump_bytes("Calibration data: ", - DUMP_PREFIX_OFFSET, data, BT_CMD_DATA_SIZE); + DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len); ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data, - BT_CMD_DATA_SIZE); + BT_CAL_HDR_LEN + len); if (ret) BT_ERR("Failed to download caibration data\n"); @@ -446,7 +438,7 @@ static int btmrvl_download_cal_data(struct btmrvl_private *priv, static int btmrvl_cal_data_dt(struct btmrvl_private *priv) { struct device_node *dt_node; - u8 cal_data[BT_CAL_DATA_SIZE]; + u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE]; const char name[] = "btmrvl_caldata"; const char property[] = "btmrvl,caldata"; int ret; @@ -455,13 +447,14 @@ static int btmrvl_cal_data_dt(struct btmrvl_private *priv) if (!dt_node) return -ENODEV; - ret = of_property_read_u8_array(dt_node, property, cal_data, - sizeof(cal_data)); + ret = of_property_read_u8_array(dt_node, property, + cal_data + BT_CAL_HDR_LEN, + BT_CAL_DATA_SIZE); if (ret) return ret; BT_DBG("Use cal data from device tree"); - ret = btmrvl_download_cal_data(priv, cal_data); + ret = btmrvl_download_cal_data(priv, cal_data, BT_CAL_DATA_SIZE); if (ret) { BT_ERR("Fail to download calibrate data"); return ret;