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path: root/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
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Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c')
-rw-r--r--drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
new file mode 100644
index 000000000000..dd5ab46a4f66
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author: Ryder Lee <ryder.lee@mediatek.com>
+ * Felix Fietkau <nbd@nbd.name>
+ */
+
+#include "mt7615.h"
+#include "eeprom.h"
+
+static int mt7615_efuse_read(struct mt7615_dev *dev, u32 base,
+ u16 addr, u8 *data)
+{
+ u32 val;
+ int i;
+
+ val = mt76_rr(dev, base + MT_EFUSE_CTRL);
+ val &= ~(MT_EFUSE_CTRL_AIN | MT_EFUSE_CTRL_MODE);
+ val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf);
+ val |= MT_EFUSE_CTRL_KICK;
+ mt76_wr(dev, base + MT_EFUSE_CTRL, val);
+
+ if (!mt76_poll(dev, base + MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000))
+ return -ETIMEDOUT;
+
+ udelay(2);
+
+ val = mt76_rr(dev, base + MT_EFUSE_CTRL);
+ if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT ||
+ WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) {
+ memset(data, 0x0, 16);
+ return 0;
+ }
+
+ for (i = 0; i < 4; i++) {
+ val = mt76_rr(dev, base + MT_EFUSE_RDATA(i));
+ put_unaligned_le32(val, data + 4 * i);
+ }
+
+ return 0;
+}
+
+static int mt7615_efuse_init(struct mt7615_dev *dev)
+{
+ u32 base = mt7615_reg_map(dev, MT_EFUSE_BASE);
+ int len = MT7615_EEPROM_SIZE;
+ int ret, i;
+ void *buf;
+
+ if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY)
+ return -EINVAL;
+
+ dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL);
+ dev->mt76.otp.size = len;
+ if (!dev->mt76.otp.data)
+ return -ENOMEM;
+
+ buf = dev->mt76.otp.data;
+ for (i = 0; i + 16 <= len; i += 16) {
+ ret = mt7615_efuse_read(dev, base, i, buf + i);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int mt7615_eeprom_load(struct mt7615_dev *dev)
+{
+ int ret;
+
+ ret = mt76_eeprom_init(&dev->mt76, MT7615_EEPROM_SIZE);
+ if (ret < 0)
+ return ret;
+
+ return mt7615_efuse_init(dev);
+}
+
+int mt7615_eeprom_init(struct mt7615_dev *dev)
+{
+ int ret;
+
+ ret = mt7615_eeprom_load(dev);
+ if (ret < 0)
+ return ret;
+
+ memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data, MT7615_EEPROM_SIZE);
+
+ dev->mt76.cap.has_2ghz = true;
+ dev->mt76.cap.has_5ghz = true;
+
+ memcpy(dev->mt76.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
+ ETH_ALEN);
+
+ mt76_eeprom_override(&dev->mt76);
+
+ return 0;
+}