1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2013-2015, Linux Foundation. All rights reserved.
4 */
5
6 #include "phy-qcom-ufs-qmp-20nm.h"
7
8 #define UFS_PHY_NAME "ufs_phy_qmp_20nm"
9
10 static
ufs_qcom_phy_qmp_20nm_phy_calibrate(struct ufs_qcom_phy * ufs_qcom_phy,bool is_rate_B)11 int ufs_qcom_phy_qmp_20nm_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy,
12 bool is_rate_B)
13 {
14 struct ufs_qcom_phy_calibration *tbl_A, *tbl_B;
15 int tbl_size_A, tbl_size_B;
16 u8 major = ufs_qcom_phy->host_ctrl_rev_major;
17 u16 minor = ufs_qcom_phy->host_ctrl_rev_minor;
18 u16 step = ufs_qcom_phy->host_ctrl_rev_step;
19 int err;
20
21 if ((major == 0x1) && (minor == 0x002) && (step == 0x0000)) {
22 tbl_size_A = ARRAY_SIZE(phy_cal_table_rate_A_1_2_0);
23 tbl_A = phy_cal_table_rate_A_1_2_0;
24 } else if ((major == 0x1) && (minor == 0x003) && (step == 0x0000)) {
25 tbl_size_A = ARRAY_SIZE(phy_cal_table_rate_A_1_3_0);
26 tbl_A = phy_cal_table_rate_A_1_3_0;
27 } else {
28 dev_err(ufs_qcom_phy->dev, "%s: Unknown UFS-PHY version, no calibration values\n",
29 __func__);
30 err = -ENODEV;
31 goto out;
32 }
33
34 tbl_size_B = ARRAY_SIZE(phy_cal_table_rate_B);
35 tbl_B = phy_cal_table_rate_B;
36
37 err = ufs_qcom_phy_calibrate(ufs_qcom_phy, tbl_A, tbl_size_A,
38 tbl_B, tbl_size_B, is_rate_B);
39
40 if (err)
41 dev_err(ufs_qcom_phy->dev, "%s: ufs_qcom_phy_calibrate() failed %d\n",
42 __func__, err);
43
44 out:
45 return err;
46 }
47
48 static
ufs_qcom_phy_qmp_20nm_advertise_quirks(struct ufs_qcom_phy * phy_common)49 void ufs_qcom_phy_qmp_20nm_advertise_quirks(struct ufs_qcom_phy *phy_common)
50 {
51 phy_common->quirks =
52 UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE;
53 }
54
55 static
ufs_qcom_phy_qmp_20nm_set_mode(struct phy * generic_phy,enum phy_mode mode,int submode)56 int ufs_qcom_phy_qmp_20nm_set_mode(struct phy *generic_phy,
57 enum phy_mode mode, int submode)
58 {
59 struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy);
60
61 phy_common->mode = PHY_MODE_INVALID;
62
63 if (mode > 0)
64 phy_common->mode = mode;
65
66 return 0;
67 }
68
69 static
ufs_qcom_phy_qmp_20nm_power_control(struct ufs_qcom_phy * phy,bool val)70 void ufs_qcom_phy_qmp_20nm_power_control(struct ufs_qcom_phy *phy, bool val)
71 {
72 bool hibern8_exit_after_pwr_collapse = phy->quirks &
73 UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE;
74
75 if (val) {
76 writel_relaxed(0x1, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL);
77 /*
78 * Before any transactions involving PHY, ensure PHY knows
79 * that it's analog rail is powered ON.
80 */
81 mb();
82
83 if (hibern8_exit_after_pwr_collapse) {
84 /*
85 * Give atleast 1us delay after restoring PHY analog
86 * power.
87 */
88 usleep_range(1, 2);
89 writel_relaxed(0x0A, phy->mmio +
90 QSERDES_COM_SYSCLK_EN_SEL_TXBAND);
91 writel_relaxed(0x08, phy->mmio +
92 QSERDES_COM_SYSCLK_EN_SEL_TXBAND);
93 /*
94 * Make sure workaround is deactivated before proceeding
95 * with normal PHY operations.
96 */
97 mb();
98 }
99 } else {
100 if (hibern8_exit_after_pwr_collapse) {
101 writel_relaxed(0x0A, phy->mmio +
102 QSERDES_COM_SYSCLK_EN_SEL_TXBAND);
103 writel_relaxed(0x02, phy->mmio +
104 QSERDES_COM_SYSCLK_EN_SEL_TXBAND);
105 /*
106 * Make sure that above workaround is activated before
107 * PHY analog power collapse.
108 */
109 mb();
110 }
111
112 writel_relaxed(0x0, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL);
113 /*
114 * ensure that PHY knows its PHY analog rail is going
115 * to be powered down
116 */
117 mb();
118 }
119 }
120
121 static
ufs_qcom_phy_qmp_20nm_set_tx_lane_enable(struct ufs_qcom_phy * phy,u32 val)122 void ufs_qcom_phy_qmp_20nm_set_tx_lane_enable(struct ufs_qcom_phy *phy, u32 val)
123 {
124 writel_relaxed(val & UFS_PHY_TX_LANE_ENABLE_MASK,
125 phy->mmio + UFS_PHY_TX_LANE_ENABLE);
126 mb();
127 }
128
ufs_qcom_phy_qmp_20nm_start_serdes(struct ufs_qcom_phy * phy)129 static inline void ufs_qcom_phy_qmp_20nm_start_serdes(struct ufs_qcom_phy *phy)
130 {
131 u32 tmp;
132
133 tmp = readl_relaxed(phy->mmio + UFS_PHY_PHY_START);
134 tmp &= ~MASK_SERDES_START;
135 tmp |= (1 << OFFSET_SERDES_START);
136 writel_relaxed(tmp, phy->mmio + UFS_PHY_PHY_START);
137 mb();
138 }
139
ufs_qcom_phy_qmp_20nm_is_pcs_ready(struct ufs_qcom_phy * phy_common)140 static int ufs_qcom_phy_qmp_20nm_is_pcs_ready(struct ufs_qcom_phy *phy_common)
141 {
142 int err = 0;
143 u32 val;
144
145 err = readl_poll_timeout(phy_common->mmio + UFS_PHY_PCS_READY_STATUS,
146 val, (val & MASK_PCS_READY), 10, 1000000);
147 if (err)
148 dev_err(phy_common->dev, "%s: poll for pcs failed err = %d\n",
149 __func__, err);
150 return err;
151 }
152
153 static const struct phy_ops ufs_qcom_phy_qmp_20nm_phy_ops = {
154 .power_on = ufs_qcom_phy_power_on,
155 .power_off = ufs_qcom_phy_power_off,
156 .set_mode = ufs_qcom_phy_qmp_20nm_set_mode,
157 .owner = THIS_MODULE,
158 };
159
160 static struct ufs_qcom_phy_specific_ops phy_20nm_ops = {
161 .calibrate = ufs_qcom_phy_qmp_20nm_phy_calibrate,
162 .start_serdes = ufs_qcom_phy_qmp_20nm_start_serdes,
163 .is_physical_coding_sublayer_ready = ufs_qcom_phy_qmp_20nm_is_pcs_ready,
164 .set_tx_lane_enable = ufs_qcom_phy_qmp_20nm_set_tx_lane_enable,
165 .power_control = ufs_qcom_phy_qmp_20nm_power_control,
166 };
167
ufs_qcom_phy_qmp_20nm_probe(struct platform_device * pdev)168 static int ufs_qcom_phy_qmp_20nm_probe(struct platform_device *pdev)
169 {
170 struct device *dev = &pdev->dev;
171 struct phy *generic_phy;
172 struct ufs_qcom_phy_qmp_20nm *phy;
173 struct ufs_qcom_phy *phy_common;
174 int err = 0;
175
176 phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
177 if (!phy) {
178 err = -ENOMEM;
179 goto out;
180 }
181 phy_common = &phy->common_cfg;
182
183 generic_phy = ufs_qcom_phy_generic_probe(pdev, phy_common,
184 &ufs_qcom_phy_qmp_20nm_phy_ops, &phy_20nm_ops);
185
186 if (!generic_phy) {
187 err = -EIO;
188 goto out;
189 }
190
191 err = ufs_qcom_phy_init_clks(phy_common);
192 if (err)
193 goto out;
194
195 err = ufs_qcom_phy_init_vregulators(phy_common);
196 if (err)
197 goto out;
198
199 ufs_qcom_phy_qmp_20nm_advertise_quirks(phy_common);
200
201 phy_set_drvdata(generic_phy, phy);
202
203 strlcpy(phy_common->name, UFS_PHY_NAME, sizeof(phy_common->name));
204
205 out:
206 return err;
207 }
208
209 static const struct of_device_id ufs_qcom_phy_qmp_20nm_of_match[] = {
210 {.compatible = "qcom,ufs-phy-qmp-20nm"},
211 {},
212 };
213 MODULE_DEVICE_TABLE(of, ufs_qcom_phy_qmp_20nm_of_match);
214
215 static struct platform_driver ufs_qcom_phy_qmp_20nm_driver = {
216 .probe = ufs_qcom_phy_qmp_20nm_probe,
217 .driver = {
218 .of_match_table = ufs_qcom_phy_qmp_20nm_of_match,
219 .name = "ufs_qcom_phy_qmp_20nm",
220 },
221 };
222
223 module_platform_driver(ufs_qcom_phy_qmp_20nm_driver);
224
225 MODULE_DESCRIPTION("Universal Flash Storage (UFS) QCOM PHY QMP 20nm");
226 MODULE_LICENSE("GPL v2");
227
