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ufs: Add mphy TX calibration support

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Added mphy TX calibration support.

Bug 4199271

Change-Id: Ia48945b026ac9d264d24937f9737484de8f203cd
Signed-off-by: Mallikarjun Kasoju <mkasoju@nvidia.com>
This commit is contained in:
Mallikarjun Kasoju
2024-06-02 15:14:24 +00:00
committed by Jon Hunter
parent 055bd73cbb
commit 248a85dbbc
2 changed files with 130 additions and 0 deletions
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126
drivers/scsi/ufs/ufs-tegra-common.c
View File

@@ -304,6 +304,126 @@ fail:
return err;
}
static void ufs_tegra_mphy_tx_calibration_enable(struct ufs_tegra_host *ufs_tegra)
{
struct device *dev = ufs_tegra->hba->dev;
if ((tegra_sku_info.platform == TEGRA_PLATFORM_VDK) ||
(tegra_sku_info.platform == TEGRA_PLATFORM_SYSTEM_FPGA) ||
(tegra_sku_info.platform == TEGRA_PLATFORM_VSP) ||
(ufs_tegra->soc->chip_id != TEGRA264))
return;
/* Enable TX Calibration */
mphy_update(ufs_tegra->mphy_l0_base,
MPHY_TX_APB_VENDOR2_0_TX_CAL_EN, MPHY_TX_APB_TX_VENDOR2_0_T264);
if (ufs_tegra->x2config == true) {
dev_err(dev, "%s:x2config is true so invoking mphy_update\n",
__func__);
mphy_update(ufs_tegra->mphy_l1_base,
MPHY_TX_APB_VENDOR2_0_TX_CAL_EN,
MPHY_TX_APB_TX_VENDOR2_0_T264);
}
mphy_update(ufs_tegra->mphy_l0_base, MPHY_GO_BIT,
MPHY_TX_APB_TX_VENDOR0_0_T234);
if (ufs_tegra->x2config == true) {
mphy_update(ufs_tegra->mphy_l1_base,
MPHY_GO_BIT, MPHY_TX_APB_TX_VENDOR0_0_T234);
}
}
static int ufs_tegra_mphy_tx_calibration_status(struct ufs_tegra_host *ufs_tegra,
void __iomem *mphy_base)
{
int err = 0;
u32 mphy_tx_vendor2;
unsigned int timeout;
struct device *dev = ufs_tegra->hba->dev;
/* Wait till lane calibration is done */
timeout = 100U; /* Number of iterations */
while (timeout != 0U) {
mphy_tx_vendor2 = mphy_readl(mphy_base,
MPHY_TX_APB_TX_VENDOR2_0_T264);
if ((mphy_tx_vendor2 & MPHY_TX_APB_VENDOR2_0_TX_CAL_DONE) != 0U) {
dev_err(dev, "%s: MPhy TX Calibration done\n", __func__);
/* Clear TX lane calibration */
mphy_tx_vendor2 &=~(MPHY_TX_APB_VENDOR2_0_TX_CAL_EN);
mphy_writel(mphy_base, mphy_tx_vendor2, MPHY_TX_APB_TX_VENDOR2_0_T264);
break;
} else {
udelay(1);
}
timeout--;
}
if (timeout == 0U) {
dev_err(dev, "%s: MPhy TX Calibration failed\n", __func__);
err = -ETIMEDOUT;
goto fail;
}
mphy_update(mphy_base, MPHY_GO_BIT,
MPHY_TX_APB_TX_VENDOR0_0_T234);
/* Wait till lane calibration clear is done */
timeout = 100U; /* Number of iterations */
while (timeout != 0U) {
mphy_tx_vendor2 = mphy_readl(mphy_base,
MPHY_TX_APB_TX_VENDOR2_0_T264);
if ((mphy_tx_vendor2 & MPHY_TX_APB_VENDOR2_0_TX_CAL_DONE) == 0U) {
dev_err(dev,
"%s: MPhy TX Calibration clear completed\n",
__func__);
break;
} else {
udelay(1);
}
timeout--;
}
if (timeout == 0U) {
dev_err(dev, "%s: MPhy TX Calibration clear failed\n", __func__);
err = -ETIMEDOUT;
}
fail:
return err;
}
static int ufs_tegra_mphy_check_tx_calibration_done_status(struct ufs_tegra_host *ufs_tegra)
{
int err = 0;
struct device *dev = ufs_tegra->hba->dev;
if ((tegra_sku_info.platform == TEGRA_PLATFORM_VDK) ||
(tegra_sku_info.platform == TEGRA_PLATFORM_SYSTEM_FPGA) ||
(tegra_sku_info.platform == TEGRA_PLATFORM_VSP) ||
(ufs_tegra->soc->chip_id != TEGRA264))
return 0;
if (ufs_tegra->x2config == true) {
err = ufs_tegra_mphy_tx_calibration_status(ufs_tegra,
ufs_tegra->mphy_l1_base);
if (err ) {
dev_err(dev, "%s: MPhy1 TX Calibration status check failed \n", __func__);
goto fail;
}
}
err = ufs_tegra_mphy_tx_calibration_status(ufs_tegra,
ufs_tegra->mphy_l0_base);
if (err ) {
dev_err(dev, "%s: MPhy0 TX Calibration status check failed \n", __func__);
goto fail;
}
dev_err(dev, "%s: MPhy TX Calibration completed\n", __func__);
fail:
return err;
}
static void ufs_tegra_mphy_war(struct ufs_tegra_host *ufs_tegra)
{
if ((ufs_tegra->soc->chip_id == TEGRA234) && (ufs_tegra->x2config)) {
@@ -1538,9 +1658,15 @@ static int ufs_tegra_link_startup_notify(struct ufs_hba *hba,
} else {
ufs_tegra_mphy_rx_sync_capability(ufs_tegra);
ufs_tegra_unipro_pre_linkup(hba);
/* Enable TX link calibration */
ufs_tegra_mphy_tx_calibration_enable(ufs_tegra);
}
break;
case POST_CHANGE:
/* Check TX link calibration status */
err = ufs_tegra_mphy_check_tx_calibration_done_status(ufs_tegra);
if (err)
return err;
/*POST_CHANGE case is called on success of link start-up*/
dev_info(hba->dev, "dme-link-startup Successful\n");
ufs_tegra_unipro_post_linkup(hba);

4
drivers/scsi/ufs/ufs-tegra.h
View File

@@ -122,6 +122,10 @@
#define MPHY_RX_APB_VENDOR2_0_RX_CAL_DONE (1 << 19)
#define MPHY_ENABLE_RX_MPHY2UPHY_IF_OVR_CTRL (1 << 26)
#define MPHY_TX_APB_TX_VENDOR2_0_T264 0x1108
#define MPHY_TX_APB_VENDOR2_0_TX_CAL_EN (1 << 15)
#define MPHY_TX_APB_VENDOR2_0_TX_CAL_DONE (1 << 19)
#define MPHY_RX_CAPABILITY_88_8B_VAL_FPGA 0x4f00fa1a
#define MPHY_RX_CAPABILITY_8C_8F_VAL_FPGA 0x50e080e
#define MPHY_RX_CAPABILITY_94_97_VAL_FPGA 0xe0e4f4f