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ca14ab55 YG |
1 | /* |
2 | * Copyright (c) 2013-2015, Linux Foundation. All rights reserved. | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "phy-qcom-ufs-qmp-14nm.h" | |
16 | ||
17 | #define UFS_PHY_NAME "ufs_phy_qmp_14nm" | |
18 | #define UFS_PHY_VDDA_PHY_UV (925000) | |
19 | ||
20 | static | |
21 | int ufs_qcom_phy_qmp_14nm_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy, | |
22 | bool is_rate_B) | |
23 | { | |
24 | int tbl_size_A = ARRAY_SIZE(phy_cal_table_rate_A); | |
25 | int tbl_size_B = ARRAY_SIZE(phy_cal_table_rate_B); | |
26 | int err; | |
27 | ||
28 | err = ufs_qcom_phy_calibrate(ufs_qcom_phy, phy_cal_table_rate_A, | |
29 | tbl_size_A, phy_cal_table_rate_B, tbl_size_B, is_rate_B); | |
30 | ||
31 | if (err) | |
32 | dev_err(ufs_qcom_phy->dev, | |
33 | "%s: ufs_qcom_phy_calibrate() failed %d\n", | |
34 | __func__, err); | |
35 | return err; | |
36 | } | |
37 | ||
38 | static | |
39 | void ufs_qcom_phy_qmp_14nm_advertise_quirks(struct ufs_qcom_phy *phy_common) | |
40 | { | |
41 | phy_common->quirks = | |
42 | UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE; | |
43 | } | |
44 | ||
45 | static int ufs_qcom_phy_qmp_14nm_init(struct phy *generic_phy) | |
46 | { | |
47 | struct ufs_qcom_phy_qmp_14nm *phy = phy_get_drvdata(generic_phy); | |
48 | struct ufs_qcom_phy *phy_common = &phy->common_cfg; | |
49 | int err; | |
50 | ||
51 | err = ufs_qcom_phy_init_clks(generic_phy, phy_common); | |
52 | if (err) { | |
53 | dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_clks() failed %d\n", | |
54 | __func__, err); | |
55 | goto out; | |
56 | } | |
57 | ||
58 | err = ufs_qcom_phy_init_vregulators(generic_phy, phy_common); | |
59 | if (err) { | |
60 | dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_vregulators() failed %d\n", | |
61 | __func__, err); | |
62 | goto out; | |
63 | } | |
64 | phy_common->vdda_phy.max_uV = UFS_PHY_VDDA_PHY_UV; | |
65 | phy_common->vdda_phy.min_uV = UFS_PHY_VDDA_PHY_UV; | |
66 | ||
67 | ufs_qcom_phy_qmp_14nm_advertise_quirks(phy_common); | |
68 | ||
69 | out: | |
70 | return err; | |
71 | } | |
72 | ||
73 | static | |
74 | void ufs_qcom_phy_qmp_14nm_power_control(struct ufs_qcom_phy *phy, bool val) | |
75 | { | |
76 | writel_relaxed(val ? 0x1 : 0x0, 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 (or OFF). | |
80 | */ | |
81 | mb(); | |
82 | } | |
83 | ||
84 | static inline | |
85 | void ufs_qcom_phy_qmp_14nm_set_tx_lane_enable(struct ufs_qcom_phy *phy, u32 val) | |
86 | { | |
87 | /* | |
88 | * 14nm PHY does not have TX_LANE_ENABLE register. | |
89 | * Implement this function so as not to propagate error to caller. | |
90 | */ | |
91 | } | |
92 | ||
93 | static inline void ufs_qcom_phy_qmp_14nm_start_serdes(struct ufs_qcom_phy *phy) | |
94 | { | |
95 | u32 tmp; | |
96 | ||
97 | tmp = readl_relaxed(phy->mmio + UFS_PHY_PHY_START); | |
98 | tmp &= ~MASK_SERDES_START; | |
99 | tmp |= (1 << OFFSET_SERDES_START); | |
100 | writel_relaxed(tmp, phy->mmio + UFS_PHY_PHY_START); | |
101 | /* Ensure register value is committed */ | |
102 | mb(); | |
103 | } | |
104 | ||
105 | static int ufs_qcom_phy_qmp_14nm_is_pcs_ready(struct ufs_qcom_phy *phy_common) | |
106 | { | |
107 | int err = 0; | |
108 | u32 val; | |
109 | ||
110 | err = readl_poll_timeout(phy_common->mmio + UFS_PHY_PCS_READY_STATUS, | |
111 | val, (val & MASK_PCS_READY), 10, 1000000); | |
112 | if (err) | |
113 | dev_err(phy_common->dev, "%s: poll for pcs failed err = %d\n", | |
114 | __func__, err); | |
115 | return err; | |
116 | } | |
117 | ||
4a9e5ca1 | 118 | static const struct phy_ops ufs_qcom_phy_qmp_14nm_phy_ops = { |
ca14ab55 YG |
119 | .init = ufs_qcom_phy_qmp_14nm_init, |
120 | .exit = ufs_qcom_phy_exit, | |
121 | .power_on = ufs_qcom_phy_power_on, | |
122 | .power_off = ufs_qcom_phy_power_off, | |
123 | .owner = THIS_MODULE, | |
124 | }; | |
125 | ||
126 | static struct ufs_qcom_phy_specific_ops phy_14nm_ops = { | |
127 | .calibrate_phy = ufs_qcom_phy_qmp_14nm_phy_calibrate, | |
128 | .start_serdes = ufs_qcom_phy_qmp_14nm_start_serdes, | |
129 | .is_physical_coding_sublayer_ready = ufs_qcom_phy_qmp_14nm_is_pcs_ready, | |
130 | .set_tx_lane_enable = ufs_qcom_phy_qmp_14nm_set_tx_lane_enable, | |
131 | .power_control = ufs_qcom_phy_qmp_14nm_power_control, | |
132 | }; | |
133 | ||
134 | static int ufs_qcom_phy_qmp_14nm_probe(struct platform_device *pdev) | |
135 | { | |
136 | struct device *dev = &pdev->dev; | |
137 | struct phy *generic_phy; | |
138 | struct ufs_qcom_phy_qmp_14nm *phy; | |
139 | int err = 0; | |
140 | ||
141 | phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); | |
142 | if (!phy) { | |
143 | dev_err(dev, "%s: failed to allocate phy\n", __func__); | |
144 | err = -ENOMEM; | |
145 | goto out; | |
146 | } | |
147 | ||
148 | generic_phy = ufs_qcom_phy_generic_probe(pdev, &phy->common_cfg, | |
149 | &ufs_qcom_phy_qmp_14nm_phy_ops, &phy_14nm_ops); | |
150 | ||
151 | if (!generic_phy) { | |
152 | dev_err(dev, "%s: ufs_qcom_phy_generic_probe() failed\n", | |
153 | __func__); | |
154 | err = -EIO; | |
155 | goto out; | |
156 | } | |
157 | ||
158 | phy_set_drvdata(generic_phy, phy); | |
159 | ||
160 | strlcpy(phy->common_cfg.name, UFS_PHY_NAME, | |
161 | sizeof(phy->common_cfg.name)); | |
162 | ||
163 | out: | |
164 | return err; | |
165 | } | |
166 | ||
167 | static int ufs_qcom_phy_qmp_14nm_remove(struct platform_device *pdev) | |
168 | { | |
169 | struct device *dev = &pdev->dev; | |
170 | struct phy *generic_phy = to_phy(dev); | |
171 | struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); | |
172 | int err = 0; | |
173 | ||
174 | err = ufs_qcom_phy_remove(generic_phy, ufs_qcom_phy); | |
175 | if (err) | |
176 | dev_err(dev, "%s: ufs_qcom_phy_remove failed = %d\n", | |
177 | __func__, err); | |
178 | ||
179 | return err; | |
180 | } | |
181 | ||
182 | static const struct of_device_id ufs_qcom_phy_qmp_14nm_of_match[] = { | |
183 | {.compatible = "qcom,ufs-phy-qmp-14nm"}, | |
184 | {}, | |
185 | }; | |
186 | MODULE_DEVICE_TABLE(of, ufs_qcom_phy_qmp_14nm_of_match); | |
187 | ||
188 | static struct platform_driver ufs_qcom_phy_qmp_14nm_driver = { | |
189 | .probe = ufs_qcom_phy_qmp_14nm_probe, | |
190 | .remove = ufs_qcom_phy_qmp_14nm_remove, | |
191 | .driver = { | |
192 | .of_match_table = ufs_qcom_phy_qmp_14nm_of_match, | |
193 | .name = "ufs_qcom_phy_qmp_14nm", | |
ca14ab55 YG |
194 | }, |
195 | }; | |
196 | ||
197 | module_platform_driver(ufs_qcom_phy_qmp_14nm_driver); | |
198 | ||
199 | MODULE_DESCRIPTION("Universal Flash Storage (UFS) QCOM PHY QMP 14nm"); | |
200 | MODULE_LICENSE("GPL v2"); |