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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,
        soul.huang@mediatek.com
Subject: [PATCH 2/7] mt76: mt7615: introduce mt7615_mcu_set_hif_suspend mcu command
Date:   Fri,  1 May 2020 12:36:12 +0200
Message-Id: <4ad1f308b355118d26f2b854151a6b8d51154813.1588329170.git.lorenzo@kernel.org>
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From: Sean Wang <sean.wang@mediatek.com>

Introduce the mt7615_mcu_set_hif_suspend mcu command, which is usually
used to configure the interface including PCIe, USB or SDIO to the right
state during operation suspend / resume.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 .../net/wireless/mediatek/mt76/mt7615/mcu.c   | 36 ++++++++++++++++++-
 .../net/wireless/mediatek/mt76/mt7615/mcu.h   |  1 +
 .../wireless/mediatek/mt76/mt7615/mt7615.h    |  2 ++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
index 0ae981a38f48..95cb239b03e5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
@@ -194,7 +194,8 @@ mt7615_mcu_parse_response(struct mt7615_dev *dev, int cmd,
 		break;
 	case MCU_UNI_CMD_DEV_INFO_UPDATE:
 	case MCU_UNI_CMD_BSS_INFO_UPDATE:
-	case MCU_UNI_CMD_STA_REC_UPDATE: {
+	case MCU_UNI_CMD_STA_REC_UPDATE:
+	case MCU_UNI_CMD_HIF_CTRL: {
 		struct mt7615_mcu_uni_event *event;
 
 		skb_pull(skb, sizeof(*rxd));
@@ -3212,3 +3213,36 @@ int mt7615_mcu_apply_tx_dpd(struct mt7615_phy *phy)
 
 	return ret;
 }
+
+int mt7615_mcu_set_hif_suspend(struct mt7615_dev *dev, bool suspend)
+{
+	struct {
+		struct {
+			u8 hif_type; /* 0x0: HIF_SDIO
+				      * 0x1: HIF_USB
+				      * 0x2: HIF_PCIE
+				      */
+			u8 pad[3];
+		} __packed hdr;
+		struct hif_suspend_tlv {
+			__le16 tag;
+			__le16 len;
+			u8 suspend;
+		} __packed hif_suspend;
+	} req = {
+		.hif_suspend = {
+			.tag = cpu_to_le16(0), /* 0: UNI_HIF_CTRL_BASIC */
+			.len = cpu_to_le16(sizeof(struct hif_suspend_tlv)),
+			.suspend = suspend,
+		},
+	};
+
+	if (mt76_is_mmio(&dev->mt76))
+		req.hdr.hif_type = 2;
+	else if (mt76_is_usb(&dev->mt76))
+		req.hdr.hif_type = 1;
+
+	return __mt76_mcu_send_msg(&dev->mt76, MCU_UNI_CMD_HIF_CTRL,
+				   &req, sizeof(req), true);
+}
+EXPORT_SYMBOL_GPL(mt7615_mcu_set_hif_suspend);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.h
index 08dcfadceaf6..1579ad944479 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.h
@@ -280,6 +280,7 @@ enum {
 	MCU_UNI_CMD_DEV_INFO_UPDATE = MCU_UNI_PREFIX | 0x01,
 	MCU_UNI_CMD_BSS_INFO_UPDATE = MCU_UNI_PREFIX | 0x02,
 	MCU_UNI_CMD_STA_REC_UPDATE = MCU_UNI_PREFIX | 0x03,
+	MCU_UNI_CMD_HIF_CTRL = MCU_UNI_PREFIX | 0x07,
 };
 
 struct mt7615_mcu_uni_event {
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
index fdb20fbdfb90..6a26555dcce6 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
@@ -531,6 +531,8 @@ int mt7615_dfs_init_radar_detector(struct mt7615_phy *phy);
 int mt7615_init_debugfs(struct mt7615_dev *dev);
 int mt7615_mcu_wait_response(struct mt7615_dev *dev, int cmd, int seq);
 
+int mt7615_mcu_set_hif_suspend(struct mt7615_dev *dev, bool suspend);
+
 int __mt7663_load_firmware(struct mt7615_dev *dev);
 
 /* usb */
-- 
2.25.4