From: Sean Wang <sean.wang@xxxxxxxxxxxx>
Add EEPROM support to MT7921 to determine the capability the card has
such as indentificaiton, MAC address, the band and antenna number the
card able to support.
Co-developed-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Co-developed-by: Soul Huang <Soul.Huang@xxxxxxxxxxxx>
Signed-off-by: Soul Huang <Soul.Huang@xxxxxxxxxxxx>
Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
---
.../wireless/mediatek/mt76/mt7921/eeprom.c | 100 ++++++++++++++++++
.../wireless/mediatek/mt76/mt7921/eeprom.h | 27 +++++
2 files changed, 127 insertions(+)
create mode 100644 drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c
create mode 100644 drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c
new file mode 100644
index 000000000000..691d14a1a7bf
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2020 MediaTek Inc. */
+
+#include "mt7921.h"
+#include "eeprom.h"
+
+static u32 mt7921_eeprom_read(struct mt7921_dev *dev, u32 offset)
+{
+ u8 *data = dev->mt76.eeprom.data;
+
+ if (data[offset] == 0xff)
+ mt7921_mcu_get_eeprom(dev, offset);
+
+ return data[offset];
+}
+
+static int mt7921_eeprom_load(struct mt7921_dev *dev)
+{
+ int ret;
+
+ ret = mt76_eeprom_init(&dev->mt76, MT7921_EEPROM_SIZE);
+ if (ret < 0)
+ return ret;
+
+ memset(dev->mt76.eeprom.data, -1, MT7921_EEPROM_SIZE);
+
+ return 0;
+}
+
+static int mt7921_check_eeprom(struct mt7921_dev *dev)
+{
+ u8 *eeprom = dev->mt76.eeprom.data;
+ u16 val;
+
+ mt7921_eeprom_read(dev, MT_EE_CHIP_ID);
+ val = get_unaligned_le16(eeprom);
+
+ switch (val) {
+ case 0x7961:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+void mt7921_eeprom_parse_band_config(struct mt7921_phy *phy)
+{
+ struct mt7921_dev *dev = phy->dev;
+ u32 val;
+
+ val = mt7921_eeprom_read(dev, MT_EE_WIFI_CONF);
+ val = FIELD_GET(MT_EE_WIFI_CONF_BAND_SEL, val);
+
+ switch (val) {
+ case MT_EE_5GHZ:
+ phy->mt76->cap.has_5ghz = true;
+ break;
+ case MT_EE_2GHZ:
+ phy->mt76->cap.has_2ghz = true;
+ break;
+ default:
+ phy->mt76->cap.has_2ghz = true;
+ phy->mt76->cap.has_5ghz = true;
+ break;
+ }
+}
+
+static void mt7921_eeprom_parse_hw_cap(struct mt7921_dev *dev)
+{
+ u8 tx_mask;
+
+ mt7921_eeprom_parse_band_config(&dev->phy);
+
+ /* TODO: read NSS with MCU_CMD_NIC_CAPV2 */
+ tx_mask = 2;
+ dev->chainmask = BIT(tx_mask) - 1;
+ dev->mphy.antenna_mask = dev->chainmask;
+ dev->mphy.chainmask = dev->mphy.antenna_mask;
+}
+
+int mt7921_eeprom_init(struct mt7921_dev *dev)
+{
+ int ret;
+
+ ret = mt7921_eeprom_load(dev);
+ if (ret < 0)
+ return ret;
+
+ ret = mt7921_check_eeprom(dev);
+ if (ret)
+ return ret;
+
+ mt7921_eeprom_parse_hw_cap(dev);
+ memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
+ ETH_ALEN);
+
+ mt76_eeprom_override(&dev->mphy);
+
+ return 0;
+}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h
new file mode 100644
index 000000000000..54f30401343c
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: ISC */
+/* Copyright (C) 2020 MediaTek Inc. */
+
+#ifndef __MT7921_EEPROM_H
+#define __MT7921_EEPROM_H
+
+#include "mt7921.h"
+
+enum mt7921_eeprom_field {
+ MT_EE_CHIP_ID = 0x000,
+ MT_EE_VERSION = 0x002,
+ MT_EE_MAC_ADDR = 0x004,
+ MT_EE_WIFI_CONF = 0x07c,
+ __MT_EE_MAX = 0x3bf
+};
+
+#define MT_EE_WIFI_CONF_TX_MASK BIT(0)
+#define MT_EE_WIFI_CONF_BAND_SEL GENMASK(3, 2)
+
+enum mt7921_eeprom_band {
+ MT_EE_NA,
+ MT_EE_5GHZ,
+ MT_EE_2GHZ,
+ MT_EE_DUAL_BAND,
+};
+
+#endif
--
2.25.1
