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scsi: ufs: mediatek: Support mphy reset

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Reset mphy when resetting host. Backup mphy setting after mphy reset
control get. Restore mphy setting after mphy reset.

Acked-by: Chun-Hung Wu <Chun-Hung.Wu@mediatek.com>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20240315083448.7185-7-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang 2024-03-15 16:34:47 +08:00 committed by Martin K. Petersen
parent 3a887a3828
commit b28820a82b
3 changed files with 23 additions and 1 deletions
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9
drivers/ufs/host/ufs-mediatek-sip.h
View File

@ -19,7 +19,7 @@
#define UFS_MTK_SIP_SRAM_PWR_CTRL BIT(5)
#define UFS_MTK_SIP_GET_VCC_NUM BIT(6)
#define UFS_MTK_SIP_DEVICE_PWR_CTRL BIT(7)
#define UFS_MTK_SIP_MPHY_CTRL BIT(8)
/*
* Multi-VCC by Numbering
@ -31,6 +31,10 @@ enum ufs_mtk_vcc_num {
UFS_VCC_MAX
};
enum ufs_mtk_mphy_op {
UFS_MPHY_BACKUP = 0,
UFS_MPHY_RESTORE
};
/*
* SMC call wrapper function
@ -80,4 +84,7 @@ static inline void _ufs_mtk_smc(struct ufs_mtk_smc_arg s)
#define ufs_mtk_device_pwr_ctrl(on, ufs_version, res) \
ufs_mtk_smc(UFS_MTK_SIP_DEVICE_PWR_CTRL, &(res), on, ufs_version)
#define ufs_mtk_mphy_ctrl(op, res) \
ufs_mtk_smc(UFS_MTK_SIP_MPHY_CTRL, &(res), op)
#endif /* !_UFS_MEDIATEK_SIP_H */

14
drivers/ufs/host/ufs-mediatek.c
View File

@ -184,16 +184,23 @@ static void ufs_mtk_crypto_enable(struct ufs_hba *hba)
static void ufs_mtk_host_reset(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
struct arm_smccc_res res;
reset_control_assert(host->hci_reset);
reset_control_assert(host->crypto_reset);
reset_control_assert(host->unipro_reset);
reset_control_assert(host->mphy_reset);
usleep_range(100, 110);
reset_control_deassert(host->unipro_reset);
reset_control_deassert(host->crypto_reset);
reset_control_deassert(host->hci_reset);
reset_control_deassert(host->mphy_reset);
/* restore mphy setting aftre mphy reset */
if (host->mphy_reset)
ufs_mtk_mphy_ctrl(UFS_MPHY_RESTORE, res);
}
static void ufs_mtk_init_reset_control(struct ufs_hba *hba,
@ -218,6 +225,8 @@ static void ufs_mtk_init_reset(struct ufs_hba *hba)
"unipro_rst");
ufs_mtk_init_reset_control(hba, &host->crypto_reset,
"crypto_rst");
ufs_mtk_init_reset_control(hba, &host->mphy_reset,
"mphy_rst");
}
static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
@ -947,6 +956,7 @@ static int ufs_mtk_init(struct ufs_hba *hba)
struct ufs_mtk_host *host;
struct Scsi_Host *shost = hba->host;
int err = 0;
struct arm_smccc_res res;
host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
if (!host) {
@ -975,6 +985,10 @@ static int ufs_mtk_init(struct ufs_hba *hba)
ufs_mtk_init_reset(hba);
/* backup mphy setting if mphy can reset */
if (host->mphy_reset)
ufs_mtk_mphy_ctrl(UFS_MPHY_BACKUP, res);
/* Enable runtime autosuspend */
hba->caps |= UFSHCD_CAP_RPM_AUTOSUSPEND;

1
drivers/ufs/host/ufs-mediatek.h
View File

@ -165,6 +165,7 @@ struct ufs_mtk_host {
struct reset_control *hci_reset;
struct reset_control *unipro_reset;
struct reset_control *crypto_reset;
struct reset_control *mphy_reset;
struct ufs_hba *hba;
struct ufs_mtk_crypt_cfg *crypt;
struct ufs_mtk_clk mclk;