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mt76: mt7921s: fix mt7921s_mcu_[fw|drv]_pmctrl

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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: 48fab5bbef ("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>
This commit is contained in:
Leon Yen 2022-01-07 03:50:10 +08:00 • committed by Felix Fietkau
parent b1fe07ed21
commit b12deb5e86
2 changed files with 40 additions and 0 deletions
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38
drivers/net/wireless/mediatek/mt76/mt7921/sdio_mcu.c
View file

@ -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);

2
drivers/net/wireless/mediatek/mt76/sdio.h
View file

@ -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 */