ath10k: support extended board data download for dual-band QCA9984

To support dual-band variant of QCA9984, new extended board data (eBDF)
is introduced since existing board data ran out of space.

Below is the brief implementation & design detail,
----------------------------------------------------

1. New OTP changes to inform eBDF support in existing OTP download to
fetch board ID and chip ID. This is backward compatible and older
card sends 0 by default for eBDF support bit (bit 18 of OTP response) we
check in ath10k driver.

2. If eBDF is supported, then we need to fetch eBDF ID which is bundled
in downloaded board data. So again OTP is executed for knowing the eBDF ID.
This is done once we set 'board_data_initialized' bit. If eBDF ID
returned is zero, we continue booting with previous board data downloaded.

3. Based on the eBDF ID fetched, ath10k driver tries to download the
extended board data to a new offset ahead of already downloaded board
data address.

4. A new BD IE type, ATH10K_BD_IE_BOARD_EXT is added to differentiate in
bundling eBDF separately in board-2.bin and also to parse through
board bundle for eBDF download in ath10k boot.

5. If eBDF is not present in the board-2.bin bundle or when board ID is
zero, we do a fallback boot to "eboard.bin" in the same QCA9984/hw1.0 dir.
This is same as done to existing "board.bin" if board ID is not present
in board-2.bin bundle.

Current design is that eBDF size will be 2KB and eBDF ID will be
byte value.

Tested the above changes with dual-band variant of QCA9984 card. OTP
update needed for the test will be part of next FW release 10.4-3.6-xxxx.

Below are the logs with ath10k BOOT debugs enabled.

First OTP response :
---------------------
..
boot upload otp to 0x1234 len 9478 for board id
boot get otp board id result 0x00040400 board_id 1 chip_id 0 ext_bid_support 1
..

Second OTP response :
---------------------
..
boot upload otp to 0x1234 len 9478 for ext board id
boot get otp ext board id result 0x00000005 ext_board_id 5
boot using eboard name 'bus=pci,bmi-chip-id=0,bmi-eboard-id=5'
..

Extended board data download:
------------------------------
..
board name
00000000: 62 75 73 3d 70 63 69 2c 62 6d 69 2d 63 68 69 70  bus=pci,bmi-chip
00000010: 2d 69 64 3d 30 2c 62 6d 69 2d 65 62 6f 61 72 64  -id=0,bmi-eboard
00000020: 2d 69 64 3d 35                                   -id=5
boot found match for name 'bus=pci,bmi-chip-id=0,bmi-eboard-id=5'
boot found eboard data for 'bus=pci,bmi-chip-id=0,bmi-eboard-id=5'
using board api 2
boot writing ext board data to addr 0xc3000
..

Fallback Extended board data download from "eboard.bin":
---------------------------------------------------------
..
board name
00000000: 62 75 73 3d 70 63 69 2c 62 6d 69 2d 63 68 69 70  bus=pci,bmi-chip
00000010: 2d 69 64 3d 30 2c 62 6d 69 2d 62 6f 61 72 64 2d  -id=0,bmi-board-
00000020: 69 64 3d 31 30                                   id=10
failed to fetch board data for bus=pci,bmi-chip-id=0,bmi-eboard-id=5 from ath10k/QCA9984/hw1.0/board-2.bin
boot fw request 'ath10k/QCA9984/hw1.0/eboard.bin': 0
using board api 1
boot writing ext board data to addr 0xc3000
..
Signed-off-by: Sathishkumar Muruganandam <murugana@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath10k/bmi.h

@@ -86,6 +86,10 @@ enum bmi_cmd_id {
 #define BMI_PARAM_GET_FLASH_BOARD_ID 0x8000
 #define BMI_PARAM_FLASH_SECTION_ALL 0x10000
 
+/* Dual-band Extended Board ID */
+#define BMI_PARAM_GET_EXT_BOARD_ID 0x40000
+#define ATH10K_BMI_EXT_BOARD_ID_SUPPORT 0x40000
+
 #define ATH10K_BMI_BOARD_ID_FROM_OTP_MASK   0x7c00
 #define ATH10K_BMI_BOARD_ID_FROM_OTP_LSB    10
 
@@ -93,6 +97,7 @@ enum bmi_cmd_id {
 #define ATH10K_BMI_CHIP_ID_FROM_OTP_LSB     15
 
 #define ATH10K_BMI_BOARD_ID_STATUS_MASK 0xff
+#define ATH10K_BMI_EBOARD_ID_STATUS_MASK 0xff
 
 struct bmi_cmd {
 	__le32 id; /* enum bmi_cmd_id */

drivers/net/wireless/ath/ath10k/core.h

@@ -861,6 +861,9 @@ struct ath10k_fw_components {
 	const struct firmware *board;
 	const void *board_data;
 	size_t board_len;
+	const struct firmware *ext_board;
+	const void *ext_board_data;
+	size_t ext_board_len;
 
 	struct ath10k_fw_file fw_file;
 };
@@ -947,7 +950,9 @@ struct ath10k {
 
 		bool bmi_ids_valid;
 		u8 bmi_board_id;
+		u8 bmi_eboard_id;
 		u8 bmi_chip_id;
+		bool ext_bid_supported;
 
 		char bdf_ext[ATH10K_SMBIOS_BDF_EXT_STR_LENGTH];
 	} id;

drivers/net/wireless/ath/ath10k/hw.h

@@ -109,6 +109,7 @@ enum qca9377_chip_id_rev {
 #define QCA9984_HW_1_0_CHIP_ID_REV	0x0
 #define QCA9984_HW_1_0_FW_DIR		ATH10K_FW_DIR "/QCA9984/hw1.0"
 #define QCA9984_HW_1_0_BOARD_DATA_FILE "board.bin"
+#define QCA9984_HW_1_0_EBOARD_DATA_FILE "eboard.bin"
 #define QCA9984_HW_1_0_PATCH_LOAD_ADDR	0x1234
 
 /* QCA9888 2.0 defines */
@@ -221,6 +222,7 @@ enum ath10k_fw_htt_op_version {
 enum ath10k_bd_ie_type {
 	/* contains sub IEs of enum ath10k_bd_ie_board_type */
 	ATH10K_BD_IE_BOARD = 0,
+	ATH10K_BD_IE_BOARD_EXT = 1,
 };
 
 enum ath10k_bd_ie_board_type {
@@ -539,6 +541,8 @@ struct ath10k_hw_params {
 		const char *dir;
 		const char *board;
 		size_t board_size;
+		const char *eboard;
+		size_t ext_board_size;
 		size_t board_ext_size;
 	} fw;
 

drivers/net/wireless/ath/ath10k/targaddrs.h

@@ -484,6 +484,10 @@ struct host_interest {
 #define QCA99X0_BOARD_DATA_SZ	  12288
 #define QCA99X0_BOARD_EXT_DATA_SZ 0
 
+/* Dual band extended board data */
+#define QCA99X0_EXT_BOARD_DATA_SZ 2048
+#define EXT_BOARD_ADDRESS_OFFSET 0x3000
+
 #define QCA4019_BOARD_DATA_SZ	  12064
 #define QCA4019_BOARD_EXT_DATA_SZ 0