diff options
Diffstat (limited to 'drivers/ufs/host/ufs-qcom.c')
| -rw-r--r-- | drivers/ufs/host/ufs-qcom.c | 97 |
1 files changed, 76 insertions, 21 deletions
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 96cb8b5b4e66..968a4c00b5ec 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -442,9 +442,25 @@ static u32 ufs_qcom_get_hs_gear(struct ufs_hba *hba) static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); + struct ufs_host_params *host_params = &host->host_params; struct phy *phy = host->generic_phy; + enum phy_mode mode; int ret; + /* + * HW ver 5 can only support up to HS-G5 Rate-A due to HW limitations. + * If the HS-G5 PHY gear is used, update host_params->hs_rate to Rate-A, + * so that the subsequent power mode change shall stick to Rate-A. + */ + if (host->hw_ver.major == 0x5) { + if (host->phy_gear == UFS_HS_G5) + host_params->hs_rate = PA_HS_MODE_A; + else + host_params->hs_rate = PA_HS_MODE_B; + } + + mode = host_params->hs_rate == PA_HS_MODE_B ? PHY_MODE_UFS_HS_B : PHY_MODE_UFS_HS_A; + /* Reset UFS Host Controller and PHY */ ret = ufs_qcom_host_reset(hba); if (ret) @@ -459,7 +475,9 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) return ret; } - phy_set_mode_ext(phy, PHY_MODE_UFS_HS_B, host->phy_gear); + ret = phy_set_mode_ext(phy, mode, host->phy_gear); + if (ret) + goto out_disable_phy; /* power on phy - start serdes and phy's power and clocks */ ret = phy_power_on(phy); @@ -898,7 +916,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, struct ufs_pa_layer_attr *dev_req_params) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); - struct ufs_dev_params ufs_qcom_cap; + struct ufs_host_params *host_params = &host->host_params; int ret = 0; if (!dev_req_params) { @@ -908,15 +926,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, switch (status) { case PRE_CHANGE: - ufshcd_init_pwr_dev_param(&ufs_qcom_cap); - ufs_qcom_cap.hs_rate = UFS_QCOM_LIMIT_HS_RATE; - - /* This driver only supports symmetic gear setting i.e., hs_tx_gear == hs_rx_gear */ - ufs_qcom_cap.hs_tx_gear = ufs_qcom_cap.hs_rx_gear = ufs_qcom_get_hs_gear(hba); - - ret = ufshcd_get_pwr_dev_param(&ufs_qcom_cap, - dev_max_params, - dev_req_params); + ret = ufshcd_negotiate_pwr_params(host_params, dev_max_params, dev_req_params); if (ret) { dev_err(hba->dev, "%s: failed to determine capabilities\n", __func__); @@ -924,11 +934,12 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, } /* - * Update phy_gear only when the gears are scaled to a higher value. This is - * because, the PHY gear settings are backwards compatible and we only need to - * change the PHY gear settings while scaling to higher gears. + * During UFS driver probe, always update the PHY gear to match the negotiated + * gear, so that, if quirk UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH is enabled, + * the second init can program the optimal PHY settings. This allows one to start + * the first init with either the minimum or the maximum support gear. */ - if (dev_req_params->gear_tx > host->phy_gear) + if (hba->ufshcd_state == UFSHCD_STATE_RESET) host->phy_gear = dev_req_params->gear_tx; /* enable the device ref clock before changing to HS mode */ @@ -1051,6 +1062,54 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba) hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH; } +static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host) +{ + struct ufs_host_params *host_params = &host->host_params; + u32 val, dev_major; + + host->phy_gear = host_params->hs_tx_gear; + + if (host->hw_ver.major < 0x4) { + /* + * For controllers whose major HW version is < 4, power up the + * PHY using minimum supported gear (UFS_HS_G2). Switching to + * max gear will be performed during reinit if supported. + * For newer controllers, whose major HW version is >= 4, power + * up the PHY using max supported gear. + */ + host->phy_gear = UFS_HS_G2; + } else if (host->hw_ver.major >= 0x5) { + val = ufshcd_readl(host->hba, REG_UFS_DEBUG_SPARE_CFG); + dev_major = FIELD_GET(UFS_DEV_VER_MAJOR_MASK, val); + + /* + * Since the UFS device version is populated, let's remove the + * REINIT quirk as the negotiated gear won't change during boot. + * So there is no need to do reinit. + */ + if (dev_major != 0x0) + host->hba->quirks &= ~UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH; + + /* + * For UFS 3.1 device and older, power up the PHY using HS-G4 + * PHY gear to save power. + */ + if (dev_major > 0x0 && dev_major < 0x4) + host->phy_gear = UFS_HS_G4; + } +} + +static void ufs_qcom_set_host_params(struct ufs_hba *hba) +{ + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + struct ufs_host_params *host_params = &host->host_params; + + ufshcd_init_host_params(host_params); + + /* This driver only supports symmetic gear setting i.e., hs_tx_gear == hs_rx_gear */ + host_params->hs_tx_gear = host_params->hs_rx_gear = ufs_qcom_get_hs_gear(hba); +} + static void ufs_qcom_set_caps(struct ufs_hba *hba) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); @@ -1275,6 +1334,8 @@ static int ufs_qcom_init(struct ufs_hba *hba) ufs_qcom_set_caps(hba); ufs_qcom_advertise_quirks(hba); + ufs_qcom_set_host_params(hba); + ufs_qcom_set_phy_gear(host); err = ufs_qcom_ice_init(host); if (err) @@ -1292,12 +1353,6 @@ static int ufs_qcom_init(struct ufs_hba *hba) dev_warn(dev, "%s: failed to configure the testbus %d\n", __func__, err); - /* - * Power up the PHY using the minimum supported gear (UFS_HS_G2). - * Switching to max gear will be performed during reinit if supported. - */ - host->phy_gear = UFS_HS_G2; - return 0; out_variant_clear: |