summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/phy/phy-core.c25
-rw-r--r--drivers/phy/samsung/phy-gs101-ufs.c28
-rw-r--r--drivers/phy/samsung/phy-samsung-ufs.c40
-rw-r--r--drivers/phy/samsung/phy-samsung-ufs.h7
-rw-r--r--include/linux/phy/phy.h19
5 files changed, 119 insertions, 0 deletions
diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 04a5a34e7a95..60be8af984bf 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -521,6 +521,31 @@ int phy_notify_disconnect(struct phy *phy, int port)
EXPORT_SYMBOL_GPL(phy_notify_disconnect);
/**
+ * phy_notify_state() - phy state notification
+ * @phy: the PHY returned by phy_get()
+ * @state: the PHY state
+ *
+ * Notify the PHY of a state transition. Used to notify and
+ * configure the PHY accordingly.
+ *
+ * Returns: %0 if successful, a negative error code otherwise
+ */
+int phy_notify_state(struct phy *phy, union phy_notify state)
+{
+ int ret;
+
+ if (!phy || !phy->ops->notify_phystate)
+ return 0;
+
+ mutex_lock(&phy->mutex);
+ ret = phy->ops->notify_phystate(phy, state);
+ mutex_unlock(&phy->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_notify_state);
+
+/**
* phy_configure() - Changes the phy parameters
* @phy: the phy returned by phy_get()
* @opts: New configuration to apply
diff --git a/drivers/phy/samsung/phy-gs101-ufs.c b/drivers/phy/samsung/phy-gs101-ufs.c
index 17b798da5b57..a15e1f453f7f 100644
--- a/drivers/phy/samsung/phy-gs101-ufs.c
+++ b/drivers/phy/samsung/phy-gs101-ufs.c
@@ -108,12 +108,39 @@ static const struct samsung_ufs_phy_cfg tensor_gs101_post_pwr_hs_config[] = {
END_UFS_PHY_CFG,
};
+static const struct samsung_ufs_phy_cfg tensor_gs101_post_h8_enter[] = {
+ PHY_TRSV_REG_CFG_GS101(0x262, 0x08, PWR_MODE_ANY),
+ PHY_TRSV_REG_CFG_GS101(0x265, 0x0A, PWR_MODE_ANY),
+ PHY_COMN_REG_CFG(0x1, 0x8, PWR_MODE_ANY),
+ PHY_COMN_REG_CFG(0x0, 0x86, PWR_MODE_ANY),
+ PHY_COMN_REG_CFG(0x8, 0x60, PWR_MODE_HS_ANY),
+ PHY_TRSV_REG_CFG_GS101(0x222, 0x08, PWR_MODE_HS_ANY),
+ PHY_TRSV_REG_CFG_GS101(0x246, 0x01, PWR_MODE_HS_ANY),
+ END_UFS_PHY_CFG,
+};
+
+static const struct samsung_ufs_phy_cfg tensor_gs101_pre_h8_exit[] = {
+ PHY_COMN_REG_CFG(0x0, 0xC6, PWR_MODE_ANY),
+ PHY_COMN_REG_CFG(0x1, 0x0C, PWR_MODE_ANY),
+ PHY_TRSV_REG_CFG_GS101(0x262, 0x00, PWR_MODE_ANY),
+ PHY_TRSV_REG_CFG_GS101(0x265, 0x00, PWR_MODE_ANY),
+ PHY_COMN_REG_CFG(0x8, 0xE0, PWR_MODE_HS_ANY),
+ PHY_TRSV_REG_CFG_GS101(0x246, 0x03, PWR_MODE_HS_ANY),
+ PHY_TRSV_REG_CFG_GS101(0x222, 0x18, PWR_MODE_HS_ANY),
+ END_UFS_PHY_CFG,
+};
+
static const struct samsung_ufs_phy_cfg *tensor_gs101_ufs_phy_cfgs[CFG_TAG_MAX] = {
[CFG_PRE_INIT] = tensor_gs101_pre_init_cfg,
[CFG_PRE_PWR_HS] = tensor_gs101_pre_pwr_hs_config,
[CFG_POST_PWR_HS] = tensor_gs101_post_pwr_hs_config,
};
+static const struct samsung_ufs_phy_cfg *tensor_gs101_hibern8_cfgs[] = {
+ [CFG_POST_HIBERN8_ENTER] = tensor_gs101_post_h8_enter,
+ [CFG_PRE_HIBERN8_EXIT] = tensor_gs101_pre_h8_exit,
+};
+
static const char * const tensor_gs101_ufs_phy_clks[] = {
"ref_clk",
};
@@ -170,6 +197,7 @@ static int gs101_phy_wait_for_cdr_lock(struct phy *phy, u8 lane)
const struct samsung_ufs_phy_drvdata tensor_gs101_ufs_phy = {
.cfgs = tensor_gs101_ufs_phy_cfgs,
+ .cfgs_hibern8 = tensor_gs101_hibern8_cfgs,
.isol = {
.offset = TENSOR_GS101_PHY_CTRL,
.mask = TENSOR_GS101_PHY_CTRL_MASK,
diff --git a/drivers/phy/samsung/phy-samsung-ufs.c b/drivers/phy/samsung/phy-samsung-ufs.c
index f3cbe6b17b23..ee665f26c236 100644
--- a/drivers/phy/samsung/phy-samsung-ufs.c
+++ b/drivers/phy/samsung/phy-samsung-ufs.c
@@ -217,6 +217,44 @@ static int samsung_ufs_phy_set_mode(struct phy *generic_phy,
return 0;
}
+static int samsung_ufs_phy_notify_state(struct phy *phy,
+ union phy_notify state)
+{
+ struct samsung_ufs_phy *ufs_phy = get_samsung_ufs_phy(phy);
+ const struct samsung_ufs_phy_cfg *cfg;
+ int i, err = -EINVAL;
+
+ if (!ufs_phy->cfgs_hibern8)
+ return 0;
+
+ if (state.ufs_state == PHY_UFS_HIBERN8_ENTER)
+ cfg = ufs_phy->cfgs_hibern8[CFG_POST_HIBERN8_ENTER];
+ else if (state.ufs_state == PHY_UFS_HIBERN8_EXIT)
+ cfg = ufs_phy->cfgs_hibern8[CFG_PRE_HIBERN8_EXIT];
+ else
+ goto err_out;
+
+ for_each_phy_cfg(cfg) {
+ for_each_phy_lane(ufs_phy, i) {
+ samsung_ufs_phy_config(ufs_phy, cfg, i);
+ }
+ }
+
+ if (state.ufs_state == PHY_UFS_HIBERN8_EXIT) {
+ for_each_phy_lane(ufs_phy, i) {
+ if (ufs_phy->drvdata->wait_for_cdr) {
+ err = ufs_phy->drvdata->wait_for_cdr(phy, i);
+ if (err)
+ goto err_out;
+ }
+ }
+ }
+
+ return 0;
+err_out:
+ return err;
+}
+
static int samsung_ufs_phy_exit(struct phy *phy)
{
struct samsung_ufs_phy *ss_phy = get_samsung_ufs_phy(phy);
@@ -233,6 +271,7 @@ static const struct phy_ops samsung_ufs_phy_ops = {
.power_off = samsung_ufs_phy_power_off,
.calibrate = samsung_ufs_phy_calibrate,
.set_mode = samsung_ufs_phy_set_mode,
+ .notify_phystate = samsung_ufs_phy_notify_state,
.owner = THIS_MODULE,
};
@@ -287,6 +326,7 @@ static int samsung_ufs_phy_probe(struct platform_device *pdev)
phy->dev = dev;
phy->drvdata = drvdata;
phy->cfgs = drvdata->cfgs;
+ phy->cfgs_hibern8 = drvdata->cfgs_hibern8;
memcpy(&phy->isol, &drvdata->isol, sizeof(phy->isol));
if (!of_property_read_u32_index(dev->of_node, "samsung,pmu-syscon", 1,
diff --git a/drivers/phy/samsung/phy-samsung-ufs.h b/drivers/phy/samsung/phy-samsung-ufs.h
index a28f148081d1..f2c2e744e5ba 100644
--- a/drivers/phy/samsung/phy-samsung-ufs.h
+++ b/drivers/phy/samsung/phy-samsung-ufs.h
@@ -92,6 +92,11 @@ enum {
CFG_TAG_MAX,
};
+enum {
+ CFG_POST_HIBERN8_ENTER,
+ CFG_PRE_HIBERN8_EXIT,
+};
+
struct samsung_ufs_phy_cfg {
u32 off_0;
u32 off_1;
@@ -108,6 +113,7 @@ struct samsung_ufs_phy_pmu_isol {
struct samsung_ufs_phy_drvdata {
const struct samsung_ufs_phy_cfg **cfgs;
+ const struct samsung_ufs_phy_cfg **cfgs_hibern8;
struct samsung_ufs_phy_pmu_isol isol;
const char * const *clk_list;
int num_clks;
@@ -124,6 +130,7 @@ struct samsung_ufs_phy {
struct clk_bulk_data *clks;
const struct samsung_ufs_phy_drvdata *drvdata;
const struct samsung_ufs_phy_cfg * const *cfgs;
+ const struct samsung_ufs_phy_cfg * const *cfgs_hibern8;
struct samsung_ufs_phy_pmu_isol isol;
u8 lane_cnt;
int ufs_phy_state;
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 13add0c2c407..2af0d01ebb39 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -53,6 +53,15 @@ enum phy_media {
PHY_MEDIA_DAC,
};
+enum phy_ufs_state {
+ PHY_UFS_HIBERN8_ENTER,
+ PHY_UFS_HIBERN8_EXIT,
+};
+
+union phy_notify {
+ enum phy_ufs_state ufs_state;
+};
+
/**
* union phy_configure_opts - Opaque generic phy configuration
*
@@ -83,6 +92,7 @@ union phy_configure_opts {
* @set_speed: set the speed of the phy (optional)
* @reset: resetting the phy
* @calibrate: calibrate the phy
+ * @notify_phystate: notify and configure the phy for a particular state
* @release: ops to be performed while the consumer relinquishes the PHY
* @owner: the module owner containing the ops
*/
@@ -132,6 +142,7 @@ struct phy_ops {
int (*connect)(struct phy *phy, int port);
int (*disconnect)(struct phy *phy, int port);
+ int (*notify_phystate)(struct phy *phy, union phy_notify state);
void (*release)(struct phy *phy);
struct module *owner;
};
@@ -255,6 +266,7 @@ int phy_reset(struct phy *phy);
int phy_calibrate(struct phy *phy);
int phy_notify_connect(struct phy *phy, int port);
int phy_notify_disconnect(struct phy *phy, int port);
+int phy_notify_state(struct phy *phy, union phy_notify state);
static inline int phy_get_bus_width(struct phy *phy)
{
return phy->attrs.bus_width;
@@ -412,6 +424,13 @@ static inline int phy_notify_disconnect(struct phy *phy, int index)
return -ENOSYS;
}
+static inline int phy_notify_state(struct phy *phy, union phy_notify state)
+{
+ if (!phy)
+ return 0;
+ return -ENOSYS;
+}
+
static inline int phy_configure(struct phy *phy,
union phy_configure_opts *opts)
{
generated by cgit (git 2.34.1) at 2025-12-25 00:40:06 +0000