forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions

BACKPORT: scsi: ufs-mediatek: Add HS-G4 support

Browse source 
Provide HS-G4 support in MediaTek UFS platforms.

To support HS-G4, introduce mechanism to get the MediaTek UFS controller
version. With such information, driver can make right decision to apply
different configurations in different controllers.

Bug: 188004633
Change-Id: Iee8b96bac9f1796693dc20f5c7d854ba7ae71939
(cherry picked from commit 638e6271ca)
[Stanley: Resolved minor conflict in drivers/scsi/ufs-mediatek.c]
[Stanley: Resolved minor conflict in drivers/scsi/ufs-mediatek.h]
Link: https://lore.kernel.org/r/20201029115750.24391-7-stanley.chu@mediatek.com
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
This commit is contained in:
Stanley Chu 2020-10-29 19:57:50 +08:00 • committed by Greg Kroah-Hartman
commit ff128c2d77
2 changed files with 41 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

32
drivers/scsi/ufs/ufs-mediatek.c
View file

@ -510,6 +510,24 @@ static int ufs_mtk_setup_clocks(struct ufs_hba *hba, bool on,
return ret;
}
static void ufs_mtk_get_controller_version(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
int ret, ver = 0;
if (host->hw_ver.major)
return;
/* Set default (minimum) version anyway */
host->hw_ver.major = 2;
ret = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_LOCALVERINFO), &ver);
if (!ret) {
if (ver >= UFS_UNIPRO_VER_1_8)
host->hw_ver.major = 3;
}
}
/**
* ufs_mtk_init - find other essential mmio bases
* @hba: host controller instance
@ -590,7 +608,9 @@ static int ufs_mtk_pre_pwr_change(struct ufs_hba *hba,
struct ufs_pa_layer_attr *dev_max_params,
struct ufs_pa_layer_attr *dev_req_params)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
struct ufs_dev_params host_cap;
u32 adapt_val;
int ret;
host_cap.tx_lanes = UFS_MTK_LIMIT_NUM_LANES_TX;
@ -615,6 +635,16 @@ static int ufs_mtk_pre_pwr_change(struct ufs_hba *hba,
__func__);
}
if (host->hw_ver.major >= 3) {
if (dev_req_params->gear_tx == UFS_HS_G4)
adapt_val = PA_INITIAL_ADAPT;
else
adapt_val = PA_NO_ADAPT;
ufshcd_dme_set(hba,
UIC_ARG_MIB(PA_TXHSADAPTTYPE),
adapt_val);
}
return ret;
}
@ -665,6 +695,8 @@ static int ufs_mtk_pre_link(struct ufs_hba *hba)
int ret;
u32 tmp;
ufs_mtk_get_controller_version(hba);
ret = ufs_mtk_unipro_set_pm(hba, false);
if (ret)
return ret;

11
drivers/scsi/ufs/ufs-mediatek.h
View file

@ -35,8 +35,8 @@
*/
#define UFS_MTK_LIMIT_NUM_LANES_RX 2
#define UFS_MTK_LIMIT_NUM_LANES_TX 2
#define UFS_MTK_LIMIT_HSGEAR_RX UFS_HS_G3
#define UFS_MTK_LIMIT_HSGEAR_TX UFS_HS_G3
#define UFS_MTK_LIMIT_HSGEAR_RX UFS_HS_G4
#define UFS_MTK_LIMIT_HSGEAR_TX UFS_HS_G4
#define UFS_MTK_LIMIT_PWMGEAR_RX UFS_PWM_G4
#define UFS_MTK_LIMIT_PWMGEAR_TX UFS_PWM_G4
#define UFS_MTK_LIMIT_RX_PWR_PWM SLOW_MODE
@ -104,6 +104,12 @@ struct ufs_mtk_crypt_cfg {
int vcore_volt;
};
struct ufs_mtk_hw_ver {
u8 step;
u8 minor;
u8 major;
};
struct ufs_mtk_host_cfg {
enum ufs_mtk_host_caps caps;
};
@ -113,6 +119,7 @@ struct ufs_mtk_host {
struct phy *mphy;
struct ufs_mtk_host_cfg *cfg;
struct ufs_mtk_crypt_cfg *crypt;
struct ufs_mtk_hw_ver hw_ver;
enum ufs_mtk_host_caps caps;
struct reset_control *hci_reset;
struct reset_control *unipro_reset;