2 * Copyright (c) 2013-2015, Linux Foundation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #ifndef UFS_QCOM_PHY_I_H_
16 #define UFS_QCOM_PHY_I_H_
18 #include <linux/module.h>
19 #include <linux/clk.h>
20 #include <linux/regulator/consumer.h>
21 #include <linux/slab.h>
22 #include <linux/phy/phy-qcom-ufs.h>
23 #include <linux/platform_device.h>
25 #include <linux/delay.h>
27 #define readl_poll_timeout(addr, val, cond, sleep_us, timeout_us) \
29 ktime_t timeout = ktime_add_us(ktime_get(), timeout_us); \
30 might_sleep_if(timeout_us); \
32 (val) = readl(addr); \
35 if (timeout_us && ktime_compare(ktime_get(), timeout) > 0) { \
36 (val) = readl(addr); \
40 usleep_range(DIV_ROUND_UP(sleep_us, 4), sleep_us); \
42 (cond) ? 0 : -ETIMEDOUT; \
45 #define UFS_QCOM_PHY_CAL_ENTRY(reg, val) \
51 #define UFS_QCOM_PHY_NAME_LEN 30
54 MASK_SERDES_START = 0x1,
59 OFFSET_SERDES_START = 0x0,
62 struct ufs_qcom_phy_stored_attributes {
68 struct ufs_qcom_phy_calibration {
73 struct ufs_qcom_phy_vreg {
75 struct regulator *reg;
84 struct list_head list;
87 void __iomem *dev_ref_clk_ctrl_mmio;
88 struct clk *tx_iface_clk;
89 struct clk *rx_iface_clk;
90 bool is_iface_clk_enabled;
91 struct clk *ref_clk_src;
92 struct clk *ref_clk_parent;
94 bool is_ref_clk_enabled;
95 bool is_dev_ref_clk_enabled;
96 struct ufs_qcom_phy_vreg vdda_pll;
97 struct ufs_qcom_phy_vreg vdda_phy;
98 struct ufs_qcom_phy_vreg vddp_ref_clk;
102 * If UFS link is put into Hibern8 and if UFS PHY analog hardware is
103 * power collapsed (by clearing UFS_PHY_POWER_DOWN_CONTROL), Hibern8
104 * exit might fail even after powering on UFS PHY analog hardware.
105 * Enabling this quirk will help to solve above issue by doing
106 * custom PHY settings just before PHY analog power collapse.
108 #define UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE BIT(0)
110 u8 host_ctrl_rev_major;
111 u16 host_ctrl_rev_minor;
112 u16 host_ctrl_rev_step;
114 char name[UFS_QCOM_PHY_NAME_LEN];
115 struct ufs_qcom_phy_calibration *cached_regs;
116 int cached_regs_table_size;
118 struct ufs_qcom_phy_specific_ops *phy_spec_ops;
122 * struct ufs_qcom_phy_specific_ops - set of pointers to functions which have a
123 * specific implementation per phy. Each UFS phy, should implement
124 * those functions according to its spec and requirements
125 * @calibrate_phy: pointer to a function that calibrate the phy
126 * @start_serdes: pointer to a function that starts the serdes
127 * @is_physical_coding_sublayer_ready: pointer to a function that
128 * checks pcs readiness. returns 0 for success and non-zero for error.
129 * @set_tx_lane_enable: pointer to a function that enable tx lanes
130 * @power_control: pointer to a function that controls analog rail of phy
131 * and writes to QSERDES_RX_SIGDET_CNTRL attribute
133 struct ufs_qcom_phy_specific_ops {
134 int (*calibrate_phy)(struct ufs_qcom_phy *phy, bool is_rate_B);
135 void (*start_serdes)(struct ufs_qcom_phy *phy);
136 int (*is_physical_coding_sublayer_ready)(struct ufs_qcom_phy *phy);
137 void (*set_tx_lane_enable)(struct ufs_qcom_phy *phy, u32 val);
138 void (*power_control)(struct ufs_qcom_phy *phy, bool val);
141 struct ufs_qcom_phy *get_ufs_qcom_phy(struct phy *generic_phy);
142 int ufs_qcom_phy_power_on(struct phy *generic_phy);
143 int ufs_qcom_phy_power_off(struct phy *generic_phy);
144 int ufs_qcom_phy_exit(struct phy *generic_phy);
145 int ufs_qcom_phy_init_clks(struct phy *generic_phy,
146 struct ufs_qcom_phy *phy_common);
147 int ufs_qcom_phy_init_vregulators(struct phy *generic_phy,
148 struct ufs_qcom_phy *phy_common);
149 int ufs_qcom_phy_remove(struct phy *generic_phy,
150 struct ufs_qcom_phy *ufs_qcom_phy);
151 struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev,
152 struct ufs_qcom_phy *common_cfg,
153 const struct phy_ops *ufs_qcom_phy_gen_ops,
154 struct ufs_qcom_phy_specific_ops *phy_spec_ops);
155 int ufs_qcom_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy,
156 struct ufs_qcom_phy_calibration *tbl_A, int tbl_size_A,
157 struct ufs_qcom_phy_calibration *tbl_B, int tbl_size_B,