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From:   Lorenzo Bianconi <lorenzo@kernel.org>
To:     nbd@nbd.name
Cc:     linux-wireless@vger.kernel.org, lorenzo.bianconi@redhat.com,
        sean.wang@mediatek.com, linux-mediatek@lists.infradead.org
Subject: [PATCH] mt76: mt7663: add the possibility to load firmware v2
Date:   Sun, 26 Apr 2020 16:40:18 +0200
Message-Id: <db72b648024aba3243ee3b7deceb548c9bc2bdf1.1587911939.git.lorenzo@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

mt7663 firmware v2 is used for embedded devices since it has more completed
features in AP mode.
Add the capability to specify in mt7615 Kconfig which firmware load first
(v3 or v2) and fallback to the other one if the selected firmware fails
to load

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 .../net/wireless/mediatek/mt76/mt7615/Kconfig | 13 +++++
 .../net/wireless/mediatek/mt76/mt7615/mcu.c   | 50 ++++++++++++++++---
 .../wireless/mediatek/mt76/mt7615/mt7615.h    |  6 ++-
 .../net/wireless/mediatek/mt76/mt7615/pci.c   |  2 +
 .../net/wireless/mediatek/mt76/mt7615/usb.c   |  2 +
 5 files changed, 65 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/Kconfig b/drivers/net/wireless/mediatek/mt76/mt7615/Kconfig
index e25db1135eda..c04d6a182bf0 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/Kconfig
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/Kconfig
@@ -38,3 +38,16 @@ config MT7663U
 	  This adds support for MT7663U 802.11ax 2x2:2 wireless devices.
 
 	  To compile this driver as a module, choose M here.
+
+config MT7615_OFFLOAD_FIRMWARE
+	bool "Prefer client mode offload firmware (MT7663)"
+	depends on MT7615E || MT7663U
+	default y
+	help
+	  Load MT7663 client mode offload firmware (v3) as primary option
+	  and fallback to MT7663 firmware v2 in case of failure.
+	  If MT7615_OFFLOAD_FIRMWARE is not selected MT7663 firmware v2
+	  will be used as primary option.
+	  MT7663 client mode offload firmware supports low power features
+	  (hw frequency scanning, scheduled frequency scanning, WoW,
+	  802.11 power save) but is more limited in AP mode
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
index aee9ee43436f..2e6ffe5afeeb 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
@@ -1728,7 +1728,7 @@ static int mt7615_load_patch(struct mt7615_dev *dev, u32 addr, const char *name)
 		return -EAGAIN;
 	}
 
-	ret = request_firmware(&fw, name, dev->mt76.dev);
+	ret = firmware_request_nowarn(&fw, name, dev->mt76.dev);
 	if (ret)
 		goto out;
 
@@ -2081,8 +2081,49 @@ static int mt7663_load_n9(struct mt7615_dev *dev, const char *name)
 	return ret;
 }
 
+static int
+mt7663_load_rom_patch(struct mt7615_dev *dev, const char **n9_firmware)
+{
+	const char *selected_rom, *secondary_rom = MT7663_ROM_PATCH;
+	const char *primary_rom = MT7663_OFFLOAD_ROM_PATCH;
+	int ret;
+
+	if (!IS_ENABLED(CONFIG_MT7615_OFFLOAD_FIRMWARE)) {
+		secondary_rom = MT7663_OFFLOAD_ROM_PATCH;
+		primary_rom = MT7663_ROM_PATCH;
+	}
+	selected_rom = primary_rom;
+
+	ret = mt7615_load_patch(dev, MT7663_PATCH_ADDRESS, primary_rom);
+	if (ret) {
+		dev_info(dev->mt76.dev, "%s not found, switching to %s",
+			 primary_rom, secondary_rom);
+		ret = mt7615_load_patch(dev, MT7663_PATCH_ADDRESS,
+					secondary_rom);
+		if (ret) {
+			dev_err(dev->mt76.dev, "failed to load %s",
+				secondary_rom);
+			return ret;
+		}
+		selected_rom = secondary_rom;
+	}
+
+	if (!strcmp(selected_rom, MT7663_OFFLOAD_ROM_PATCH)) {
+		*n9_firmware = MT7663_OFFLOAD_FIRMWARE_N9;
+		dev->fw_ver = MT7615_FIRMWARE_V3;
+		dev->mcu_ops = &uni_update_ops;
+	} else {
+		*n9_firmware = MT7663_FIRMWARE_N9;
+		dev->fw_ver = MT7615_FIRMWARE_V2;
+		dev->mcu_ops = &sta_update_ops;
+	}
+
+	return 0;
+}
+
 int __mt7663_load_firmware(struct mt7615_dev *dev)
 {
+	const char *n9_firmware;
 	int ret;
 
 	ret = mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY);
@@ -2091,14 +2132,11 @@ int __mt7663_load_firmware(struct mt7615_dev *dev)
 		return -EIO;
 	}
 
-	ret = mt7615_load_patch(dev, MT7663_PATCH_ADDRESS, MT7663_ROM_PATCH);
+	ret = mt7663_load_rom_patch(dev, &n9_firmware);
 	if (ret)
 		return ret;
 
-	dev->fw_ver = MT7615_FIRMWARE_V3;
-	dev->mcu_ops = &uni_update_ops;
-
-	ret = mt7663_load_n9(dev, MT7663_FIRMWARE_N9);
+	ret = mt7663_load_n9(dev, n9_firmware);
 	if (ret)
 		return ret;
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
index 44eb3d8dca78..0476b9426b03 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
@@ -42,8 +42,10 @@
 #define MT7615_FIRMWARE_V2		2
 #define MT7615_FIRMWARE_V3		3
 
-#define MT7663_ROM_PATCH		"mediatek/mt7663pr2h.bin"
-#define MT7663_FIRMWARE_N9              "mediatek/mt7663_n9_v3.bin"
+#define MT7663_OFFLOAD_ROM_PATCH	"mediatek/mt7663pr2h.bin"
+#define MT7663_OFFLOAD_FIRMWARE_N9	"mediatek/mt7663_n9_v3.bin"
+#define MT7663_ROM_PATCH		"mediatek/mt7663pr2h_rebb.bin"
+#define MT7663_FIRMWARE_N9		"mediatek/mt7663_n9_rebb.bin"
 
 #define MT7615_EEPROM_SIZE		1024
 #define MT7615_TOKEN_SIZE		4096
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/pci.c b/drivers/net/wireless/mediatek/mt76/mt7615/pci.c
index 21b3ec29aa12..f9469198cabd 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/pci.c
@@ -68,5 +68,7 @@ MODULE_DEVICE_TABLE(pci, mt7615_pci_device_table);
 MODULE_FIRMWARE(MT7615_FIRMWARE_CR4);
 MODULE_FIRMWARE(MT7615_FIRMWARE_N9);
 MODULE_FIRMWARE(MT7615_ROM_PATCH);
+MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
+MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
 MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
 MODULE_FIRMWARE(MT7663_ROM_PATCH);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/usb.c b/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
index bcd131969923..9353175b139b 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
@@ -386,6 +386,8 @@ mt7663u_resume(struct usb_interface *intf)
 }
 
 MODULE_DEVICE_TABLE(usb, mt7615_device_table);
+MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
+MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
 MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
 MODULE_FIRMWARE(MT7663_ROM_PATCH);
 
-- 
2.25.4