From: Leon Yen leon.yen@mediatek.com
[ Upstream commit b12deb5e86fa36dc6f3aa3321f5da27addec4f1f ]
According to the firmware behavior (even the oldest one in linux-firmware) If the firmware is downloaded, MT7921S must rely on the additional mailbox mechanism that resides in firmware to check if the device is the right state for mt7921s_mcu_[fw|drv]_pmctrl. Otherwise, we still apply the old way for that.
That is a necessary patch before we enable runtime pm for mt7921s as default.
Fixes: 48fab5bbef40 ("mt76: mt7921: introduce mt7921s support") Co-developed-by: Sean Wang sean.wang@mediatek.com Signed-off-by: Sean Wang sean.wang@mediatek.com Signed-off-by: Leon Yen leon.yen@mediatek.com Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Sasha Levin sashal@kernel.org --- .../wireless/mediatek/mt76/mt7921/sdio_mcu.c | 38 +++++++++++++++++++ drivers/net/wireless/mediatek/mt76/sdio.h | 2 + 2 files changed, 40 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/sdio_mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/sdio_mcu.c index d20f2ff01be1..5d8af18c7026 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/sdio_mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/sdio_mcu.c @@ -49,6 +49,26 @@ mt7921s_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb, return ret; }
+static u32 mt7921s_read_rm3r(struct mt7921_dev *dev) +{ + struct mt76_sdio *sdio = &dev->mt76.sdio; + + return sdio_readl(sdio->func, MCR_D2HRM3R, NULL); +} + +static u32 mt7921s_clear_rm3r_drv_own(struct mt7921_dev *dev) +{ + struct mt76_sdio *sdio = &dev->mt76.sdio; + u32 val; + + val = sdio_readl(sdio->func, MCR_D2HRM3R, NULL); + if (val) + sdio_writel(sdio->func, H2D_SW_INT_CLEAR_MAILBOX_ACK, + MCR_WSICR, NULL); + + return val; +} + int mt7921s_mcu_init(struct mt7921_dev *dev) { static const struct mt76_mcu_ops mt7921s_mcu_ops = { @@ -88,6 +108,12 @@ int mt7921s_mcu_drv_pmctrl(struct mt7921_dev *dev)
err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status, status & WHLPCR_IS_DRIVER_OWN, 2000, 1000000); + + if (!err && test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state)) + err = readx_poll_timeout(mt7921s_read_rm3r, dev, status, + status & D2HRM3R_IS_DRIVER_OWN, + 2000, 1000000); + sdio_release_host(func);
if (err < 0) { @@ -115,12 +141,24 @@ int mt7921s_mcu_fw_pmctrl(struct mt7921_dev *dev)
sdio_claim_host(func);
+ if (test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state)) { + err = readx_poll_timeout(mt7921s_clear_rm3r_drv_own, + dev, status, + !(status & D2HRM3R_IS_DRIVER_OWN), + 2000, 1000000); + if (err < 0) { + dev_err(dev->mt76.dev, "mailbox ACK not cleared\n"); + goto err; + } + } + sdio_writel(func, WHLPCR_FW_OWN_REQ_SET, MCR_WHLPCR, NULL);
err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status, !(status & WHLPCR_IS_DRIVER_OWN), 2000, 1000000); sdio_release_host(func);
+err: if (err < 0) { dev_err(dev->mt76.dev, "firmware own failed\n"); clear_bit(MT76_STATE_PM, &mphy->state); diff --git a/drivers/net/wireless/mediatek/mt76/sdio.h b/drivers/net/wireless/mediatek/mt76/sdio.h index 99db4ad93b7c..27d5d2077eba 100644 --- a/drivers/net/wireless/mediatek/mt76/sdio.h +++ b/drivers/net/wireless/mediatek/mt76/sdio.h @@ -65,6 +65,7 @@ #define MCR_H2DSM0R 0x0070 #define H2D_SW_INT_READ BIT(16) #define H2D_SW_INT_WRITE BIT(17) +#define H2D_SW_INT_CLEAR_MAILBOX_ACK BIT(22)
#define MCR_H2DSM1R 0x0074 #define MCR_D2HRM0R 0x0078 @@ -109,6 +110,7 @@ #define MCR_H2DSM2R 0x0160 /* supported in CONNAC2 */ #define MCR_H2DSM3R 0x0164 /* supported in CONNAC2 */ #define MCR_D2HRM3R 0x0174 /* supported in CONNAC2 */ +#define D2HRM3R_IS_DRIVER_OWN BIT(0) #define MCR_WTQCR8 0x0190 /* supported in CONNAC2 */ #define MCR_WTQCR9 0x0194 /* supported in CONNAC2 */ #define MCR_WTQCR10 0x0198 /* supported in CONNAC2 */