mt76: add mac80211 driver for MT7915 PCIe-based chipsets

Add support for the MediaTek latest generation IEEE 802.11ax 4x4
device MT7915E, which supports concurrent dual-band operation at
both 5GHz and 2.4GHz.

Note that this patch just add basic part and will add more HE
capabilities support in the further patches.

The driver supports AP, Station, Mesh and monitor mode.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Chih-Min Chen <chih-min.chen@mediatek.com>
Suggested-by: Shihwei Lin <shihwei.lin@mediatek.com>
Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Acked-by: Yiwei Chung <yiwei.chung@mediatek.com>
Acked-by: YF Luo <yf.luo@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 78 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h
new file mode 100644
index 000000000000..30fc607e466d
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: ISC */
+/* Copyright (C) 2020 MediaTek Inc. */
+
+#ifndef __MT7915_EEPROM_H
+#define __MT7915_EEPROM_H
+
+#include "mt7915.h"
+
+struct cal_data {
+	u8 count;
+	u16 offset[60];
+};
+
+enum mt7915_eeprom_field {
+	MT_EE_CHIP_ID =		0x000,
+	MT_EE_VERSION =		0x002,
+	MT_EE_MAC_ADDR =	0x004,
+	MT_EE_DDIE_FT_VERSION =	0x050,
+	MT_EE_WIFI_CONF =	0x190,
+	MT_EE_TX0_POWER_2G =	0x2fc,
+	MT_EE_TX0_POWER_5G =	0x34b,
+	MT_EE_ADIE_FT_VERSION =	0x9a0,
+
+	__MT_EE_MAX =		0xe00
+};
+
+#define MT_EE_WIFI_CONF_TX_MASK			GENMASK(2, 0)
+#define MT_EE_WIFI_CONF_BAND_SEL		GENMASK(7, 6)
+#define MT_EE_WIFI_CONF_TSSI0_2G		BIT(0)
+#define MT_EE_WIFI_CONF_TSSI0_5G		BIT(2)
+#define MT_EE_WIFI_CONF_TSSI1_5G		BIT(4)
+
+enum mt7915_eeprom_band {
+	MT_EE_DUAL_BAND,
+	MT_EE_5GHZ,
+	MT_EE_2GHZ,
+	MT_EE_DBDC,
+};
+
+struct sku_group {
+	u8 len;
+	u16 offset[2];
+	const u8 *delta_map;
+};
+
+static inline int
+mt7915_get_channel_group(int channel)
+{
+	if (channel >= 184 && channel <= 196)
+		return 0;
+	if (channel <= 48)
+		return 1;
+	if (channel <= 64)
+		return 2;
+	if (channel <= 96)
+		return 3;
+	if (channel <= 112)
+		return 4;
+	if (channel <= 128)
+		return 5;
+	if (channel <= 144)
+		return 6;
+	return 7;
+}
+
+static inline bool
+mt7915_tssi_enabled(struct mt7915_dev *dev, enum nl80211_band band)
+{
+	u8 *eep = dev->mt76.eeprom.data;
+
+	/* TODO: DBDC */
+	if (band == NL80211_BAND_5GHZ)
+		return eep[MT_EE_WIFI_CONF + 7] & MT_EE_WIFI_CONF_TSSI0_5G;
+	else
+		return eep[MT_EE_WIFI_CONF + 7] & MT_EE_WIFI_CONF_TSSI0_2G;
+}
+
+#endif