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[PATCH 2/3] phy: samsung-ufs: support exynosauto ufs phy driver

Sowon Na posted 3 patches 2 weeks, 3 days ago
There is a newer version of this series
[PATCH 2/3] phy: samsung-ufs: support exynosauto ufs phy driver
Posted by Sowon Na 2 weeks, 3 days ago 
Support phy-exynosautov920-ufs driver for ExynosAutov920 series SoCs,
using "samsung,exynosautov920-ufs-phy" compatible.

Signed-off-by: Sowon Na <sowon.na@samsung.com>
---
 drivers/phy/samsung/Makefile                 |   1 +
 drivers/phy/samsung/phy-exynosautov920-ufs.c | 159 +++++++++++++++++++
 drivers/phy/samsung/phy-samsung-ufs.c        |   9 +-
 drivers/phy/samsung/phy-samsung-ufs.h        |   4 +
 4 files changed, 170 insertions(+), 3 deletions(-)
 create mode 100644 drivers/phy/samsung/phy-exynosautov920-ufs.c

diff --git a/drivers/phy/samsung/Makefile b/drivers/phy/samsung/Makefile
index fea1f96d0e43..342682638a87 100644
--- a/drivers/phy/samsung/Makefile
+++ b/drivers/phy/samsung/Makefile
@@ -7,6 +7,7 @@ phy-exynos-ufs-y			+= phy-gs101-ufs.o
 phy-exynos-ufs-y			+= phy-samsung-ufs.o
 phy-exynos-ufs-y			+= phy-exynos7-ufs.o
 phy-exynos-ufs-y			+= phy-exynosautov9-ufs.o
+phy-exynos-ufs-y			+= phy-exynosautov920-ufs.o
 phy-exynos-ufs-y			+= phy-fsd-ufs.o
 obj-$(CONFIG_PHY_SAMSUNG_USB2)		+= phy-exynos-usb2.o
 phy-exynos-usb2-y			+= phy-samsung-usb2.o
diff --git a/drivers/phy/samsung/phy-exynosautov920-ufs.c b/drivers/phy/samsung/phy-exynosautov920-ufs.c
new file mode 100644
index 000000000000..8f4a94e13781
--- /dev/null
+++ b/drivers/phy/samsung/phy-exynosautov920-ufs.c
@@ -0,0 +1,159 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * UFS PHY driver data for Samsung EXYNOSAUTO v920 SoC
+ *
+ * Copyright (C) 2024 Samsung Electronics Co., Ltd.
+ */
+
+#include "phy-samsung-ufs.h"
+
+#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL			0x708
+#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_MASK		0x1
+#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_EN		BIT(0)
+#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS	0x5e
+
+#define PHY_TRSV_REG_CFG_AUTOV920(o, v, d) \
+	PHY_TRSV_REG_CFG_OFFSET(o, v, d, 0x200)
+
+/* Calibration for phy initialization */
+static const struct samsung_ufs_phy_cfg exynosautov920_pre_init_cfg[] = {
+	PHY_COMN_REG_CFG(0x29, 0x22, PWR_MODE_ANY),
+	PHY_COMN_REG_CFG(0x43, 0x10, PWR_MODE_ANY),
+	PHY_COMN_REG_CFG(0x3C, 0x14, PWR_MODE_ANY),
+	PHY_COMN_REG_CFG(0x46, 0x48, PWR_MODE_ANY),
+	PHY_COMN_REG_CFG(0x04, 0x95, PWR_MODE_ANY),
+	PHY_COMN_REG_CFG(0x06, 0x30, PWR_MODE_ANY),
+
+	PHY_TRSV_REG_CFG_AUTOV920(0x200, 0x00, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x201, 0x06, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x202, 0x06, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x203, 0x0A, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x204, 0x00, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x205, 0x10, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x207, 0x0C, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2E1, 0xC0, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x22D, 0xF8, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x234, 0x60, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x238, 0x13, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x239, 0x48, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x23A, 0x01, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x23B, 0x29, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x23C, 0x2A, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x23D, 0x01, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x23E, 0x14, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x23F, 0x13, PWR_MODE_ANY),
+
+	PHY_TRSV_REG_CFG_AUTOV920(0x240, 0x4A, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x243, 0x40, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x244, 0x02, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x25D, 0x00, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x25E, 0x3F, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x25F, 0xFF, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x26F, 0xF0, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x273, 0x33, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x274, 0x50, PWR_MODE_ANY),
+
+	PHY_TRSV_REG_CFG_AUTOV920(0x284, 0x02, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x285, 0x02, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2A2, 0x04, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x27D, 0x01, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2FA, 0x01, PWR_MODE_ANY),
+
+	PHY_TRSV_REG_CFG_AUTOV920(0x286, 0x03, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x287, 0x03, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x288, 0x03, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x289, 0x03, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2B3, 0x04, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2B6, 0x0B, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2B7, 0x0B, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2B8, 0x0B, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2B9, 0x0B, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2BA, 0x0B, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2BB, 0x06, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2BC, 0x06, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2BD, 0x06, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x2BE, 0x06, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x34B, 0x01, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x34C, 0x24, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x34D, 0x23, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x34E, 0x45, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x34F, 0x00, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x350, 0x31, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x351, 0x00, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x352, 0x02, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x353, 0x00, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x354, 0x01, PWR_MODE_ANY),
+
+	PHY_COMN_REG_CFG(0x43, 0x18, PWR_MODE_ANY),
+	PHY_COMN_REG_CFG(0x43, 0x00, PWR_MODE_ANY),
+
+	END_UFS_PHY_CFG,
+};
+
+/* Calibration for HS mode series A/B */
+static const struct samsung_ufs_phy_cfg exynosautov920_pre_pwr_hs_cfg[] = {
+	PHY_TRSV_REG_CFG_AUTOV920(0x369, 0x11, PWR_MODE_ANY),
+	PHY_TRSV_REG_CFG_AUTOV920(0x246, 0x03, PWR_MODE_ANY),
+
+	END_UFS_PHY_CFG,
+};
+
+static const struct samsung_ufs_phy_cfg exynosautov920_post_pwr_hs_cfg[] = {
+	END_UFS_PHY_CFG,
+};
+
+#define DELAY_IN_US	40
+#define RETRY_CNT	100
+#define MASK		0x8
+int samsung_ufs_phy_wait_cdr_lock(struct phy *phy, u8 lane)
+{
+	struct samsung_ufs_phy *ufs_phy = get_samsung_ufs_phy(phy);
+	u32 reg, i;
+
+	struct samsung_ufs_phy_cfg cfg[4] = {
+		PHY_TRSV_REG_CFG_AUTOV920(0x222, 0x10, PWR_MODE_ANY),
+		PHY_TRSV_REG_CFG_AUTOV920(0x222, 0x18, PWR_MODE_ANY),
+		PHY_TRSV_REG_CFG_AUTOV920(0x246, 0x01, PWR_MODE_ANY),
+		END_UFS_PHY_CFG,
+	};
+
+	for (i = 0; i < RETRY_CNT; i++) {
+		udelay(DELAY_IN_US);
+
+		reg = readl(ufs_phy->reg_pma + 0xCE4 + (0x800 * lane));
+		if ((reg & MASK) == MASK)
+			break;
+
+		udelay(DELAY_IN_US);
+
+		samsung_ufs_phy_config(ufs_phy, &cfg[0], lane);
+		samsung_ufs_phy_config(ufs_phy, &cfg[1], lane);
+	}
+
+	samsung_ufs_phy_config(ufs_phy, &cfg[2], lane);
+
+	return 0;
+}
+
+static const struct samsung_ufs_phy_cfg *exynosautov920_ufs_phy_cfgs[CFG_TAG_MAX] = {
+	[CFG_PRE_INIT]          = exynosautov920_pre_init_cfg,
+	[CFG_PRE_PWR_HS]        = exynosautov920_pre_pwr_hs_cfg,
+	[CFG_POST_PWR_HS]       = exynosautov920_post_pwr_hs_cfg,
+};
+
+static const char * const exynosautov920_ufs_phy_clks[] = {
+	"ref_clk",
+};
+
+const struct samsung_ufs_phy_drvdata exynosautov920_ufs_phy = {
+	.cfgs = exynosautov920_ufs_phy_cfgs,
+	.isol = {
+		.offset = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL,
+		.mask = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_MASK,
+		.en = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_EN,
+	},
+	.clk_list = exynosautov920_ufs_phy_clks,
+	.num_clks = ARRAY_SIZE(exynosautov920_ufs_phy_clks),
+	.cdr_lock_status_offset = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS,
+	.wait_for_cdr = samsung_ufs_phy_wait_cdr_lock,
+};
diff --git a/drivers/phy/samsung/phy-samsung-ufs.c b/drivers/phy/samsung/phy-samsung-ufs.c
index 6c5d41552649..c13fe149bc75 100644
--- a/drivers/phy/samsung/phy-samsung-ufs.c
+++ b/drivers/phy/samsung/phy-samsung-ufs.c
@@ -28,9 +28,9 @@
 
 #define PHY_DEF_LANE_CNT	1
 
-static void samsung_ufs_phy_config(struct samsung_ufs_phy *phy,
-				   const struct samsung_ufs_phy_cfg *cfg,
-				   u8 lane)
+void samsung_ufs_phy_config(struct samsung_ufs_phy *phy,
+			    const struct samsung_ufs_phy_cfg *cfg,
+			    u8 lane)
 {
 	enum {LANE_0, LANE_1}; /* lane index */
 
@@ -323,6 +323,9 @@ static const struct of_device_id samsung_ufs_phy_match[] = {
 	}, {
 		.compatible = "samsung,exynosautov9-ufs-phy",
 		.data = &exynosautov9_ufs_phy,
+	}, {
+		.compatible = "samsung,exynosautov920-ufs-phy",
+		.data = &exynosautov920_ufs_phy,
 	}, {
 		.compatible = "tesla,fsd-ufs-phy",
 		.data = &fsd_ufs_phy,
diff --git a/drivers/phy/samsung/phy-samsung-ufs.h b/drivers/phy/samsung/phy-samsung-ufs.h
index 9b7deef6e10f..b7a8ec6bcafa 100644
--- a/drivers/phy/samsung/phy-samsung-ufs.h
+++ b/drivers/phy/samsung/phy-samsung-ufs.h
@@ -143,9 +143,13 @@ static inline void samsung_ufs_phy_ctrl_isol(
 }
 
 int samsung_ufs_phy_wait_for_lock_acq(struct phy *phy, u8 lane);
+int samsung_ufs_phy_wait_cdr_lock(struct phy *phy, u8 lane);
+void samsung_ufs_phy_config(struct samsung_ufs_phy *phy,
+			    const struct samsung_ufs_phy_cfg *cfg, u8 lane);
 
 extern const struct samsung_ufs_phy_drvdata exynos7_ufs_phy;
 extern const struct samsung_ufs_phy_drvdata exynosautov9_ufs_phy;
+extern const struct samsung_ufs_phy_drvdata exynosautov920_ufs_phy;
 extern const struct samsung_ufs_phy_drvdata fsd_ufs_phy;
 extern const struct samsung_ufs_phy_drvdata tensor_gs101_ufs_phy;
 
-- 
2.45.2
RE: [PATCH 2/3] phy: samsung-ufs: support exynosauto ufs phy driver
Posted by Alim Akhtar 2 weeks, 2 days ago 
Hello Sowon

> -----Original Message-----
> From: Sowon Na <sowon.na@samsung.com>
> Sent: Thursday, November 7, 2024 9:45 AM
> To: robh@kernel.org; krzk@kernel.org; conor+dt@kernel.org;
> vkoul@kernel.org; alim.akhtar@samsung.com; kishon@kernel.org
> Cc: krzk+dt@kernel.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org; linux-samsung-soc@vger.kernel.org;
> sowon.na@samsung.com
> Subject: [PATCH 2/3] phy: samsung-ufs: support exynosauto ufs phy driver
> 
s/exynosauto/ exynosautov920
let's be specific as we have v9 variant as well.

> Support phy-exynosautov920-ufs driver for ExynosAutov920 series SoCs,
> using "samsung,exynosautov920-ufs-phy" compatible.
> 
s/ ExynosAutov920/ exynosautov920
May be just: Add support for exynosautov920 ufs phy driver

using "samsung,exynosautov920-ufs-phy" compatible is obvious

> Signed-off-by: Sowon Na <sowon.na@samsung.com>
> ---
>  drivers/phy/samsung/Makefile                 |   1 +
>  drivers/phy/samsung/phy-exynosautov920-ufs.c | 159
> +++++++++++++++++++
>  drivers/phy/samsung/phy-samsung-ufs.c        |   9 +-
>  drivers/phy/samsung/phy-samsung-ufs.h        |   4 +
>  4 files changed, 170 insertions(+), 3 deletions(-)  create mode 100644
> drivers/phy/samsung/phy-exynosautov920-ufs.c
> 
> diff --git a/drivers/phy/samsung/Makefile b/drivers/phy/samsung/Makefile
> index fea1f96d0e43..342682638a87 100644
> --- a/drivers/phy/samsung/Makefile
> +++ b/drivers/phy/samsung/Makefile
> @@ -7,6 +7,7 @@ phy-exynos-ufs-y			+= phy-gs101-ufs.o
>  phy-exynos-ufs-y			+= phy-samsung-ufs.o
>  phy-exynos-ufs-y			+= phy-exynos7-ufs.o
>  phy-exynos-ufs-y			+= phy-exynosautov9-ufs.o
> +phy-exynos-ufs-y			+= phy-exynosautov920-ufs.o
>  phy-exynos-ufs-y			+= phy-fsd-ufs.o
>  obj-$(CONFIG_PHY_SAMSUNG_USB2)		+= phy-exynos-
> usb2.o
>  phy-exynos-usb2-y			+= phy-samsung-usb2.o
> diff --git a/drivers/phy/samsung/phy-exynosautov920-ufs.c
> b/drivers/phy/samsung/phy-exynosautov920-ufs.c
> new file mode 100644
> index 000000000000..8f4a94e13781
> --- /dev/null
> +++ b/drivers/phy/samsung/phy-exynosautov920-ufs.c
> @@ -0,0 +1,159 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * UFS PHY driver data for Samsung EXYNOSAUTO v920 SoC
Let be consistent with the naming, may be EXYNOSAUTOV920

> + *
> + * Copyright (C) 2024 Samsung Electronics Co., Ltd.
> + */
> +
> +#include "phy-samsung-ufs.h"
> +
> +#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL
> 	0x708
> +#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_MASK
> 	0x1
> +#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_EN
> 	BIT(0)
> +#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS
> 	0x5e
> +
> +#define PHY_TRSV_REG_CFG_AUTOV920(o, v, d) \
> +	PHY_TRSV_REG_CFG_OFFSET(o, v, d, 0x200)
No magic number please, add a macro for 0x200
May be PHY_EXYNOSAUTOV920_LANE_OFFSET

> +
> +/* Calibration for phy initialization */ static const struct
> +samsung_ufs_phy_cfg exynosautov920_pre_init_cfg[] = {
> +	PHY_COMN_REG_CFG(0x29, 0x22, PWR_MODE_ANY),
> +	PHY_COMN_REG_CFG(0x43, 0x10, PWR_MODE_ANY),
> +	PHY_COMN_REG_CFG(0x3C, 0x14, PWR_MODE_ANY),
> +	PHY_COMN_REG_CFG(0x46, 0x48, PWR_MODE_ANY),
> +	PHY_COMN_REG_CFG(0x04, 0x95, PWR_MODE_ANY),
> +	PHY_COMN_REG_CFG(0x06, 0x30, PWR_MODE_ANY),
> +
> +	PHY_TRSV_REG_CFG_AUTOV920(0x200, 0x00, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x201, 0x06, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x202, 0x06, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x203, 0x0A, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x204, 0x00, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x205, 0x10, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x207, 0x0C, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2E1, 0xC0, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x22D, 0xF8, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x234, 0x60, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x238, 0x13, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x239, 0x48, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x23A, 0x01, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x23B, 0x29, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x23C, 0x2A, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x23D, 0x01, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x23E, 0x14, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x23F, 0x13, PWR_MODE_ANY),
> +
> +	PHY_TRSV_REG_CFG_AUTOV920(0x240, 0x4A, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x243, 0x40, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x244, 0x02, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x25D, 0x00, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x25E, 0x3F, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x25F, 0xFF, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x26F, 0xF0, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x273, 0x33, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x274, 0x50, PWR_MODE_ANY),
> +
> +	PHY_TRSV_REG_CFG_AUTOV920(0x284, 0x02, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x285, 0x02, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2A2, 0x04, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x27D, 0x01, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2FA, 0x01, PWR_MODE_ANY),
> +
> +	PHY_TRSV_REG_CFG_AUTOV920(0x286, 0x03, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x287, 0x03, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x288, 0x03, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x289, 0x03, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2B3, 0x04, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2B6, 0x0B, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2B7, 0x0B, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2B8, 0x0B, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2B9, 0x0B, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2BA, 0x0B, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2BB, 0x06, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2BC, 0x06, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2BD, 0x06, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x2BE, 0x06, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x34B, 0x01, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x34C, 0x24, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x34D, 0x23, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x34E, 0x45, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x34F, 0x00, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x350, 0x31, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x351, 0x00, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x352, 0x02, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x353, 0x00, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x354, 0x01, PWR_MODE_ANY),
> +
> +	PHY_COMN_REG_CFG(0x43, 0x18, PWR_MODE_ANY),
> +	PHY_COMN_REG_CFG(0x43, 0x00, PWR_MODE_ANY),
> +
> +	END_UFS_PHY_CFG,
> +};
> +
> +/* Calibration for HS mode series A/B */ static const struct
> +samsung_ufs_phy_cfg exynosautov920_pre_pwr_hs_cfg[] = {
> +	PHY_TRSV_REG_CFG_AUTOV920(0x369, 0x11, PWR_MODE_ANY),
> +	PHY_TRSV_REG_CFG_AUTOV920(0x246, 0x03, PWR_MODE_ANY),
> +
> +	END_UFS_PHY_CFG,
> +};
> +
> +static const struct samsung_ufs_phy_cfg
> exynosautov920_post_pwr_hs_cfg[] = {
> +	END_UFS_PHY_CFG,
> +};
> +
> +#define DELAY_IN_US	40
> +#define RETRY_CNT	100
> +#define MASK		0x8
> +int samsung_ufs_phy_wait_cdr_lock(struct phy *phy, u8 lane) {
This is specific to v920, so rename the function as exynosautov920_ufs_*

> +	struct samsung_ufs_phy *ufs_phy = get_samsung_ufs_phy(phy);
> +	u32 reg, i;
> +
> +	struct samsung_ufs_phy_cfg cfg[4] = {
> +		PHY_TRSV_REG_CFG_AUTOV920(0x222, 0x10,
> PWR_MODE_ANY),
> +		PHY_TRSV_REG_CFG_AUTOV920(0x222, 0x18,
> PWR_MODE_ANY),
> +		PHY_TRSV_REG_CFG_AUTOV920(0x246, 0x01,
> PWR_MODE_ANY),
> +		END_UFS_PHY_CFG,
> +	};
> +
> +	for (i = 0; i < RETRY_CNT; i++) {
> +		udelay(DELAY_IN_US);
> +
> +		reg = readl(ufs_phy->reg_pma + 0xCE4 + (0x800 * lane));
Please have macro for the offsets

> +		if ((reg & MASK) == MASK)
MASK is very generic, can we have some meaningful name for better readability and understanding

> +			break;

How you are handling error here, what will happen if CDR lock fails?

> +
> +		udelay(DELAY_IN_US);
> +
> +		samsung_ufs_phy_config(ufs_phy, &cfg[0], lane);
> +		samsung_ufs_phy_config(ufs_phy, &cfg[1], lane);
> +	}
> +
> +	samsung_ufs_phy_config(ufs_phy, &cfg[2], lane);
> +
> +	return 0;
> +}
> +
> +static const struct samsung_ufs_phy_cfg
> *exynosautov920_ufs_phy_cfgs[CFG_TAG_MAX] = {
> +	[CFG_PRE_INIT]          = exynosautov920_pre_init_cfg,
> +	[CFG_PRE_PWR_HS]        = exynosautov920_pre_pwr_hs_cfg,
> +	[CFG_POST_PWR_HS]       = exynosautov920_post_pwr_hs_cfg,
> +};
> +
> +static const char * const exynosautov920_ufs_phy_clks[] = {
> +	"ref_clk",
> +};
> +
> +const struct samsung_ufs_phy_drvdata exynosautov920_ufs_phy = {
> +	.cfgs = exynosautov920_ufs_phy_cfgs,
> +	.isol = {
> +		.offset = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL,
> +		.mask =
> EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_MASK,
> +		.en =
> EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_EN,
> +	},
> +	.clk_list = exynosautov920_ufs_phy_clks,
> +	.num_clks = ARRAY_SIZE(exynosautov920_ufs_phy_clks),
> +	.cdr_lock_status_offset =
> EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS,
> +	.wait_for_cdr = samsung_ufs_phy_wait_cdr_lock, };
> diff --git a/drivers/phy/samsung/phy-samsung-ufs.c
> b/drivers/phy/samsung/phy-samsung-ufs.c
> index 6c5d41552649..c13fe149bc75 100644
> --- a/drivers/phy/samsung/phy-samsung-ufs.c
> +++ b/drivers/phy/samsung/phy-samsung-ufs.c
> @@ -28,9 +28,9 @@
> 
>  #define PHY_DEF_LANE_CNT	1
> 
> -static void samsung_ufs_phy_config(struct samsung_ufs_phy *phy,
> -				   const struct samsung_ufs_phy_cfg *cfg,
> -				   u8 lane)
> +void samsung_ufs_phy_config(struct samsung_ufs_phy *phy,
> +			    const struct samsung_ufs_phy_cfg *cfg,
> +			    u8 lane)
>  {
>  	enum {LANE_0, LANE_1}; /* lane index */
> 
> @@ -323,6 +323,9 @@ static const struct of_device_id
> samsung_ufs_phy_match[] = {
>  	}, {
>  		.compatible = "samsung,exynosautov9-ufs-phy",
>  		.data = &exynosautov9_ufs_phy,
> +	}, {
> +		.compatible = "samsung,exynosautov920-ufs-phy",
> +		.data = &exynosautov920_ufs_phy,
>  	}, {
>  		.compatible = "tesla,fsd-ufs-phy",
>  		.data = &fsd_ufs_phy,
> diff --git a/drivers/phy/samsung/phy-samsung-ufs.h
> b/drivers/phy/samsung/phy-samsung-ufs.h
> index 9b7deef6e10f..b7a8ec6bcafa 100644
> --- a/drivers/phy/samsung/phy-samsung-ufs.h
> +++ b/drivers/phy/samsung/phy-samsung-ufs.h
> @@ -143,9 +143,13 @@ static inline void samsung_ufs_phy_ctrl_isol(  }
> 
>  int samsung_ufs_phy_wait_for_lock_acq(struct phy *phy, u8 lane);
> +int samsung_ufs_phy_wait_cdr_lock(struct phy *phy, u8 lane); void
> +samsung_ufs_phy_config(struct samsung_ufs_phy *phy,
> +			    const struct samsung_ufs_phy_cfg *cfg, u8 lane);
> 
>  extern const struct samsung_ufs_phy_drvdata exynos7_ufs_phy;  extern
> const struct samsung_ufs_phy_drvdata exynosautov9_ufs_phy;
> +extern const struct samsung_ufs_phy_drvdata exynosautov920_ufs_phy;
>  extern const struct samsung_ufs_phy_drvdata fsd_ufs_phy;  extern const
> struct samsung_ufs_phy_drvdata tensor_gs101_ufs_phy;
> 
> --
> 2.45.2
Re: [PATCH 2/3] phy: samsung-ufs: support exynosauto ufs phy driver
Posted by Krzysztof Kozlowski 2 weeks, 2 days ago 
On Thu, Nov 07, 2024 at 03:35:23PM +0530, Alim Akhtar wrote:
> Hello Sowon
> 
> > -----Original Message-----
> > From: Sowon Na <sowon.na@samsung.com>
> > Sent: Thursday, November 7, 2024 9:45 AM
> > To: robh@kernel.org; krzk@kernel.org; conor+dt@kernel.org;
> > vkoul@kernel.org; alim.akhtar@samsung.com; kishon@kernel.org
> > Cc: krzk+dt@kernel.org; linux-kernel@vger.kernel.org;
> > devicetree@vger.kernel.org; linux-samsung-soc@vger.kernel.org;
> > sowon.na@samsung.com
> > Subject: [PATCH 2/3] phy: samsung-ufs: support exynosauto ufs phy driver
> > 
> s/exynosauto/ exynosautov920
> let's be specific as we have v9 variant as well.
> 
> > Support phy-exynosautov920-ufs driver for ExynosAutov920 series SoCs,
> > using "samsung,exynosautov920-ufs-phy" compatible.
> > 
> s/ ExynosAutov920/ exynosautov920
> May be just: Add support for exynosautov920 ufs phy driver
> 
> using "samsung,exynosautov920-ufs-phy" compatible is obvious
> 
> > Signed-off-by: Sowon Na <sowon.na@samsung.com>
> > ---
> >  drivers/phy/samsung/Makefile                 |   1 +
> >  drivers/phy/samsung/phy-exynosautov920-ufs.c | 159
> > +++++++++++++++++++
> >  drivers/phy/samsung/phy-samsung-ufs.c        |   9 +-
> >  drivers/phy/samsung/phy-samsung-ufs.h        |   4 +
> >  4 files changed, 170 insertions(+), 3 deletions(-)  create mode 100644
> > drivers/phy/samsung/phy-exynosautov920-ufs.c
> > 
> > diff --git a/drivers/phy/samsung/Makefile b/drivers/phy/samsung/Makefile
> > index fea1f96d0e43..342682638a87 100644
> > --- a/drivers/phy/samsung/Makefile
> > +++ b/drivers/phy/samsung/Makefile
> > @@ -7,6 +7,7 @@ phy-exynos-ufs-y			+= phy-gs101-ufs.o
> >  phy-exynos-ufs-y			+= phy-samsung-ufs.o
> >  phy-exynos-ufs-y			+= phy-exynos7-ufs.o
> >  phy-exynos-ufs-y			+= phy-exynosautov9-ufs.o
> > +phy-exynos-ufs-y			+= phy-exynosautov920-ufs.o
> >  phy-exynos-ufs-y			+= phy-fsd-ufs.o
> >  obj-$(CONFIG_PHY_SAMSUNG_USB2)		+= phy-exynos-
> > usb2.o
> >  phy-exynos-usb2-y			+= phy-samsung-usb2.o
> > diff --git a/drivers/phy/samsung/phy-exynosautov920-ufs.c
> > b/drivers/phy/samsung/phy-exynosautov920-ufs.c
> > new file mode 100644
> > index 000000000000..8f4a94e13781
> > --- /dev/null
> > +++ b/drivers/phy/samsung/phy-exynosautov920-ufs.c
> > @@ -0,0 +1,159 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * UFS PHY driver data for Samsung EXYNOSAUTO v920 SoC
> Let be consistent with the naming, may be EXYNOSAUTOV920

We keep everywhere non-capitalized name, so ExynosAuto

Best regards,
Krzysztof

Patchew 2.1-devel-b67e4c2

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