1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * UFS PHY driver for Samsung EXYNOS SoC
4  *
5  * Copyright (C) 2020 Samsung Electronics Co., Ltd.
6  * Author: Seungwon Jeon <essuuj@gmail.com>
7  * Author: Alim Akhtar <alim.akhtar@samsung.com>
8  *
9  */
10 #ifndef _PHY_SAMSUNG_UFS_
11 #define _PHY_SAMSUNG_UFS_
12 
13 #include <linux/phy/phy.h>
14 #include <linux/regmap.h>
15 
16 #define PHY_COMN_BLK	1
17 #define PHY_TRSV_BLK	2
18 #define END_UFS_PHY_CFG { 0 }
19 #define PHY_TRSV_CH_OFFSET	0x30
20 #define PHY_APB_ADDR(off)	((off) << 2)
21 
22 #define PHY_COMN_REG_CFG(o, v, d) {	\
23 	.off_0 = PHY_APB_ADDR((o)),	\
24 	.off_1 = 0,		\
25 	.val = (v),		\
26 	.desc = (d),		\
27 	.id = PHY_COMN_BLK,	\
28 }
29 
30 #define PHY_TRSV_REG_CFG_OFFSET(o, v, d, c) {	\
31 	.off_0 = PHY_APB_ADDR((o)),	\
32 	.off_1 = PHY_APB_ADDR((o) + (c)),	\
33 	.val = (v),		\
34 	.desc = (d),		\
35 	.id = PHY_TRSV_BLK,	\
36 }
37 
38 #define PHY_TRSV_REG_CFG(o, v, d)	\
39 	PHY_TRSV_REG_CFG_OFFSET(o, v, d, PHY_TRSV_CH_OFFSET)
40 
41 /* UFS PHY registers */
42 #define PHY_PLL_LOCK_STATUS	0x1e
43 
44 #define PHY_PLL_LOCK_BIT	BIT(5)
45 #define PHY_CDR_LOCK_BIT	BIT(4)
46 
47 /* description for PHY calibration */
48 enum {
49 	/* applicable to any */
50 	PWR_DESC_ANY	= 0,
51 	/* mode */
52 	PWR_DESC_PWM	= 1,
53 	PWR_DESC_HS	= 2,
54 	/* series */
55 	PWR_DESC_SER_A	= 1,
56 	PWR_DESC_SER_B	= 2,
57 	/* gear */
58 	PWR_DESC_G1	= 1,
59 	PWR_DESC_G2	= 2,
60 	PWR_DESC_G3	= 3,
61 	/* field mask */
62 	MD_MASK		= 0x3,
63 	SR_MASK		= 0x3,
64 	GR_MASK		= 0x7,
65 };
66 
67 #define PWR_MODE_HS_G1_ANY	PWR_MODE_HS(PWR_DESC_G1, PWR_DESC_ANY)
68 #define PWR_MODE_HS_G1_SER_A	PWR_MODE_HS(PWR_DESC_G1, PWR_DESC_SER_A)
69 #define PWR_MODE_HS_G1_SER_B	PWR_MODE_HS(PWR_DESC_G1, PWR_DESC_SER_B)
70 #define PWR_MODE_HS_G2_ANY	PWR_MODE_HS(PWR_DESC_G2, PWR_DESC_ANY)
71 #define PWR_MODE_HS_G2_SER_A	PWR_MODE_HS(PWR_DESC_G2, PWR_DESC_SER_A)
72 #define PWR_MODE_HS_G2_SER_B	PWR_MODE_HS(PWR_DESC_G2, PWR_DESC_SER_B)
73 #define PWR_MODE_HS_G3_ANY	PWR_MODE_HS(PWR_DESC_G3, PWR_DESC_ANY)
74 #define PWR_MODE_HS_G3_SER_A	PWR_MODE_HS(PWR_DESC_G3, PWR_DESC_SER_A)
75 #define PWR_MODE_HS_G3_SER_B	PWR_MODE_HS(PWR_DESC_G3, PWR_DESC_SER_B)
76 #define PWR_MODE(g, s, m)	((((g) & GR_MASK) << 4) |\
77 				 (((s) & SR_MASK) << 2) | ((m) & MD_MASK))
78 #define PWR_MODE_PWM_ANY	PWR_MODE(PWR_DESC_ANY,\
79 					 PWR_DESC_ANY, PWR_DESC_PWM)
80 #define PWR_MODE_HS(g, s)	((((g) & GR_MASK) << 4) |\
81 				 (((s) & SR_MASK) << 2) | PWR_DESC_HS)
82 #define PWR_MODE_HS_ANY		PWR_MODE(PWR_DESC_ANY,\
83 					 PWR_DESC_ANY, PWR_DESC_HS)
84 #define PWR_MODE_ANY		PWR_MODE(PWR_DESC_ANY,\
85 					 PWR_DESC_ANY, PWR_DESC_ANY)
86 /* PHY calibration point/state */
87 enum {
88 	CFG_PRE_INIT,
89 	CFG_POST_INIT,
90 	CFG_PRE_PWR_HS,
91 	CFG_POST_PWR_HS,
92 	CFG_TAG_MAX,
93 };
94 
95 struct samsung_ufs_phy_cfg {
96 	u32 off_0;
97 	u32 off_1;
98 	u32 val;
99 	u8 desc;
100 	u8 id;
101 };
102 
103 struct samsung_ufs_phy_pmu_isol {
104 	u32 offset;
105 	u32 mask;
106 	u32 en;
107 };
108 
109 struct samsung_ufs_phy_drvdata {
110 	const struct samsung_ufs_phy_cfg **cfgs;
111 	struct samsung_ufs_phy_pmu_isol isol;
112 	const char * const *clk_list;
113 	int num_clks;
114 	u32 cdr_lock_status_offset;
115 };
116 
117 struct samsung_ufs_phy {
118 	struct device *dev;
119 	void __iomem *reg_pma;
120 	struct regmap *reg_pmu;
121 	struct clk_bulk_data *clks;
122 	const struct samsung_ufs_phy_drvdata *drvdata;
123 	const struct samsung_ufs_phy_cfg * const *cfgs;
124 	struct samsung_ufs_phy_pmu_isol isol;
125 	u8 lane_cnt;
126 	int ufs_phy_state;
127 	enum phy_mode mode;
128 };
129 
get_samsung_ufs_phy(struct phy * phy)130 static inline struct samsung_ufs_phy *get_samsung_ufs_phy(struct phy *phy)
131 {
132 	return (struct samsung_ufs_phy *)phy_get_drvdata(phy);
133 }
134 
samsung_ufs_phy_ctrl_isol(struct samsung_ufs_phy * phy,u32 isol)135 static inline void samsung_ufs_phy_ctrl_isol(
136 		struct samsung_ufs_phy *phy, u32 isol)
137 {
138 	regmap_update_bits(phy->reg_pmu, phy->isol.offset,
139 			   phy->isol.mask, isol ? 0 : phy->isol.en);
140 }
141 
142 extern const struct samsung_ufs_phy_drvdata exynos7_ufs_phy;
143 extern const struct samsung_ufs_phy_drvdata exynosautov9_ufs_phy;
144 extern const struct samsung_ufs_phy_drvdata fsd_ufs_phy;
145 
146 #endif /* _PHY_SAMSUNG_UFS_ */
147