mt76: move mt76x2_get_efuse_data in mt76x02-lib module

Move mt76x2_efuse_read and mt76x2_get_efuse_data in mt76x02_eeprom.c
in order to be reused in mt76x0 driver for eeprom parsing

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 72 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c
new file mode 100644
index 000000000000..21fe7eb0652d
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
+ * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <asm/unaligned.h>
+
+#include "mt76.h"
+#include "mt76x02_eeprom.h"
+#include "mt76x02_regs.h"
+
+static int
+mt76x02_efuse_read(struct mt76_dev *dev, u16 addr, u8 *data,
+		   enum mt76x02_eeprom_modes mode)
+{
+	u32 val;
+	int i;
+
+	val = __mt76_rr(dev, MT_EFUSE_CTRL);
+	val &= ~(MT_EFUSE_CTRL_AIN |
+		 MT_EFUSE_CTRL_MODE);
+	val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf);
+	val |= FIELD_PREP(MT_EFUSE_CTRL_MODE, mode);
+	val |= MT_EFUSE_CTRL_KICK;
+	__mt76_wr(dev, MT_EFUSE_CTRL, val);
+
+	if (!__mt76_poll_msec(dev, MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK,
+			      0, 1000))
+		return -ETIMEDOUT;
+
+	udelay(2);
+
+	val = __mt76_rr(dev, MT_EFUSE_CTRL);
+	if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT) {
+		memset(data, 0xff, 16);
+		return 0;
+	}
+
+	for (i = 0; i < 4; i++) {
+		val = __mt76_rr(dev, MT_EFUSE_DATA(i));
+		put_unaligned_le32(val, data + 4 * i);
+	}
+
+	return 0;
+}
+
+int mt76x02_get_efuse_data(struct mt76_dev *dev, u16 base, void *buf,
+			   int len, enum mt76x02_eeprom_modes mode)
+{
+	int ret, i;
+
+	for (i = 0; i + 16 <= len; i += 16) {
+		ret = mt76x02_efuse_read(dev, base + i, buf + i, mode);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mt76x02_get_efuse_data);