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>
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 @@
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);