[PATCH] mt76: mt7915: add default calibrated data support

Shayne Chen
2021-10-27T08:08:41Z

Load the default eeprom data when the content of flash/efuse is invalid.
This could help to eliminate some issues due to incorrect or
insufficient rf values.

Co-developed-by: Bo Jiao <Bo.Jiao@mediatek.com>
Signed-off-by: Bo Jiao <Bo.Jiao@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Reviewed-by: Ryder Lee <ryder.lee@mediatek.com>
---
.../wireless/mediatek/mt76/mt7915/eeprom.c | 83 +++++++++++++++----
.../net/wireless/mediatek/mt76/mt7915/mcu.c | 24 ++++++
.../net/wireless/mediatek/mt76/mt7915/mcu.h | 1 +
.../wireless/mediatek/mt76/mt7915/mt7915.h | 4 +
4 files changed, 98 insertions(+), 14 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
index ee3d644..626ea4a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: ISC
/* Copyright (C) 2020 MediaTek Inc. */

+#include <linux/firmware.h>
#include "mt7915.h"
#include "eeprom.h"

@@ -10,6 +11,9 @@ static int mt7915_eeprom_load_precal(struct mt7915_dev *dev)
u8 *eeprom = mdev->eeprom.data;
u32 val = eeprom[MT_EE_DO_PRE_CAL];

+ if (!dev->flash_mode)
+ return 0;
+
if (val != (MT_EE_WIFI_CAL_DPD | MT_EE_WIFI_CAL_GROUP))
return 0;

@@ -21,6 +25,49 @@ static int mt7915_eeprom_load_precal(struct mt7915_dev *dev)
return mt76_get_of_eeprom(mdev, dev->cal, MT_EE_PRECAL, val);
}

+static int mt7915_check_eeprom(struct mt7915_dev *dev)
+{
+ u8 *eeprom = dev->mt76.eeprom.data;
+ u16 val = get_unaligned_le16(eeprom);
+
+ switch (val) {
+ case 0x7915:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int
+mt7915_eeprom_load_default(struct mt7915_dev *dev)
+{
+ char *default_bin = MT7915_EEPROM_DEFAULT;
+ u8 *eeprom = dev->mt76.eeprom.data;
+ const struct firmware *fw = NULL;
+ int ret;
+
+ if (dev->dbdc_support)
+ default_bin = MT7915_EEPROM_DEFAULT_DBDC;
+
+ ret = request_firmware(&fw, default_bin, dev->mt76.dev);
+ if (ret)
+ goto out;
+
+ if (!fw || !fw->data) {
+ dev_err(dev->mt76.dev, "Invalid default bin\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ memcpy(eeprom, fw->data, MT7915_EEPROM_SIZE);
+ dev->flash_mode = true;
+
+out:
+ release_firmware(fw);
+
+ return ret;
+}
+
static int mt7915_eeprom_load(struct mt7915_dev *dev)
{
int ret;
@@ -31,8 +78,8 @@ static int mt7915_eeprom_load(struct mt7915_dev *dev)

if (ret) {
dev->flash_mode = true;
- ret = mt7915_eeprom_load_precal(dev);
} else {
+ /* read eeprom data from efuse */
u32 block_num, i;

block_num = DIV_ROUND_UP(MT7915_EEPROM_SIZE,
@@ -42,20 +89,28 @@ static int mt7915_eeprom_load(struct mt7915_dev *dev)
i * MT7915_EEPROM_BLOCK_SIZE);
}

- return ret;
-}
-
-static int mt7915_check_eeprom(struct mt7915_dev *dev)
-{
- u8 *eeprom = dev->mt76.eeprom.data;
- u16 val = get_unaligned_le16(eeprom);
+ if (!dev->flash_mode) {
+ u8 free_block_num;
+
+ mt7915_mcu_get_eeprom_free_block(dev, &free_block_num);
+ if (free_block_num >= 29) {
+ dev_warn(dev->mt76.dev,
+ "efuse info not enough, use default bin\n");
+ ret = mt7915_eeprom_load_default(dev);
+ if (ret)
+ return ret;
+ }
+ }

- switch (val) {
- case 0x7915:
- return 0;
- default:
- return -EINVAL;
+ ret = mt7915_check_eeprom(dev);
+ if (ret) {
+ dev_warn(dev->mt76.dev, "eeprom check fail, use default bin\n");
+ ret = mt7915_eeprom_load_default(dev);
+ if (ret)
+ return ret;
}
+
+ return ret;
}

void mt7915_eeprom_parse_band_config(struct mt7915_phy *phy)
@@ -120,7 +175,7 @@ int mt7915_eeprom_init(struct mt7915_dev *dev)
if (ret < 0)
return ret;

- ret = mt7915_check_eeprom(dev);
+ ret = mt7915_eeprom_load_precal(dev);
if (ret)
return ret;

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index b054663..ee9952d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -3580,6 +3580,30 @@ int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset)
return 0;
}

+int mt7915_mcu_get_eeprom_free_block(struct mt7915_dev *dev, u8 *block_num)
+{
+ struct {
+ u8 _rsv;
+ u8 version;
+ u8 die_idx;
+ u8 _rsv2;
+ } __packed req = {
+ .version = 1,
+ };
+ struct sk_buff *skb;
+ int ret;
+
+ ret = mt76_mcu_send_and_get_msg(&dev->mt76, MCU_EXT_QUERY(EFUSE_FREE_BLOCK), &req,
+ sizeof(req), true, &skb);
+ if (ret)
+ return ret;
+
+ *block_num = *(u8 *)skb->data;
+ dev_kfree_skb(skb);
+
+ return 0;
+}
+
static int mt7915_mcu_set_pre_cal(struct mt7915_dev *dev, u8 idx,
u8 *data, u32 len, int cmd)
{
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
index b563e7c..e9f39ed 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
@@ -278,6 +278,7 @@ enum {
MCU_EXT_CMD_MUAR_UPDATE = 0x48,
MCU_EXT_CMD_RX_AIRTIME_CTRL = 0x4a,
MCU_EXT_CMD_SET_RX_PATH = 0x4e,
+ MCU_EXT_CMD_EFUSE_FREE_BLOCK = 0x4f,
MCU_EXT_CMD_TX_POWER_FEATURE_CTRL = 0x58,
MCU_EXT_CMD_GET_MIB_INFO = 0x5a,
MCU_EXT_CMD_MWDS_SUPPORT = 0x80,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index e69b4c8..c6c846d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -30,6 +30,9 @@
#define MT7915_FIRMWARE_WM "mediatek/mt7915_wm.bin"
#define MT7915_ROM_PATCH "mediatek/mt7915_rom_patch.bin"

+#define MT7915_EEPROM_DEFAULT "mediatek/mt7915_eeprom.bin"
+#define MT7915_EEPROM_DEFAULT_DBDC "mediatek/mt7915_eeprom_dbdc.bin"
+
#define MT7915_EEPROM_SIZE 3584
#define MT7915_EEPROM_BLOCK_SIZE 16
#define MT7915_TOKEN_SIZE 8192
@@ -423,6 +426,7 @@ int mt7915_mcu_set_fixed_rate_ctrl(struct mt7915_dev *dev,
void *data, u32 field);
int mt7915_mcu_set_eeprom(struct mt7915_dev *dev);
int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset);
+int mt7915_mcu_get_eeprom_free_block(struct mt7915_dev *dev, u8 *block_num);
int mt7915_mcu_set_mac(struct mt7915_dev *dev, int band, bool enable,
bool hdr_trans);
int mt7915_mcu_set_test_param(struct mt7915_dev *dev, u8 param, bool test_mode,
--
2.25.1