Commit | Line | Data |
---|---|---|
036f29d5 ZG |
1 | /* |
2 | * Copyright (c) 2013 Linaro Ltd. | |
3 | * Copyright (c) 2013 Hisilicon Limited. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | */ | |
10 | ||
036f29d5 | 11 | #include <linux/clk.h> |
0293efdd | 12 | #include <linux/mfd/syscon.h> |
036f29d5 ZG |
13 | #include <linux/mmc/host.h> |
14 | #include <linux/mmc/dw_mmc.h> | |
0293efdd | 15 | #include <linux/module.h> |
036f29d5 | 16 | #include <linux/of_address.h> |
0293efdd ZG |
17 | #include <linux/platform_device.h> |
18 | #include <linux/regmap.h> | |
19 | #include <linux/regulator/consumer.h> | |
036f29d5 ZG |
20 | |
21 | #include "dw_mmc.h" | |
22 | #include "dw_mmc-pltfm.h" | |
23 | ||
0293efdd ZG |
24 | /* |
25 | * hi6220 sd only support io voltage 1.8v and 3v | |
26 | * Also need config AO_SCTRL_SEL18 accordingly | |
27 | */ | |
28 | #define AO_SCTRL_SEL18 BIT(10) | |
29 | #define AO_SCTRL_CTRL3 0x40C | |
30 | ||
31 | struct k3_priv { | |
32 | struct regmap *reg; | |
33 | }; | |
34 | ||
036f29d5 ZG |
35 | static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios) |
36 | { | |
036f29d5 ZG |
37 | int ret; |
38 | ||
0e662440 | 39 | ret = clk_set_rate(host->ciu_clk, ios->clock); |
036f29d5 | 40 | if (ret) |
0e662440 | 41 | dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock); |
036f29d5 ZG |
42 | |
43 | host->bus_hz = clk_get_rate(host->ciu_clk); | |
44 | } | |
45 | ||
036f29d5 ZG |
46 | static const struct dw_mci_drv_data k3_drv_data = { |
47 | .set_ios = dw_mci_k3_set_ios, | |
036f29d5 ZG |
48 | }; |
49 | ||
0293efdd ZG |
50 | static int dw_mci_hi6220_parse_dt(struct dw_mci *host) |
51 | { | |
52 | struct k3_priv *priv; | |
53 | ||
54 | priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL); | |
55 | if (!priv) | |
56 | return -ENOMEM; | |
57 | ||
58 | priv->reg = syscon_regmap_lookup_by_phandle(host->dev->of_node, | |
59 | "hisilicon,peripheral-syscon"); | |
60 | if (IS_ERR(priv->reg)) | |
61 | priv->reg = NULL; | |
62 | ||
63 | host->priv = priv; | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static int dw_mci_hi6220_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) | |
68 | { | |
69 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
70 | struct k3_priv *priv; | |
71 | struct dw_mci *host; | |
72 | int min_uv, max_uv; | |
73 | int ret; | |
74 | ||
75 | host = slot->host; | |
76 | priv = host->priv; | |
77 | ||
78 | if (!priv || !priv->reg) | |
79 | return 0; | |
80 | ||
81 | if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { | |
82 | ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3, | |
83 | AO_SCTRL_SEL18, 0); | |
84 | min_uv = 3000000; | |
85 | max_uv = 3000000; | |
86 | } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { | |
87 | ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3, | |
88 | AO_SCTRL_SEL18, AO_SCTRL_SEL18); | |
89 | min_uv = 1800000; | |
90 | max_uv = 1800000; | |
91 | } else { | |
92 | dev_dbg(host->dev, "voltage not supported\n"); | |
93 | return -EINVAL; | |
94 | } | |
95 | ||
96 | if (ret) { | |
97 | dev_dbg(host->dev, "switch voltage failed\n"); | |
98 | return ret; | |
99 | } | |
100 | ||
101 | if (IS_ERR_OR_NULL(mmc->supply.vqmmc)) | |
102 | return 0; | |
103 | ||
104 | ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv); | |
105 | if (ret) { | |
106 | dev_dbg(host->dev, "Regulator set error %d: %d - %d\n", | |
107 | ret, min_uv, max_uv); | |
108 | return ret; | |
109 | } | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | static void dw_mci_hi6220_set_ios(struct dw_mci *host, struct mmc_ios *ios) | |
115 | { | |
116 | int ret; | |
117 | unsigned int clock; | |
118 | ||
119 | clock = (ios->clock <= 25000000) ? 25000000 : ios->clock; | |
120 | ||
121 | ret = clk_set_rate(host->biu_clk, clock); | |
122 | if (ret) | |
123 | dev_warn(host->dev, "failed to set rate %uHz\n", clock); | |
124 | ||
125 | host->bus_hz = clk_get_rate(host->biu_clk); | |
126 | } | |
127 | ||
128 | static const struct dw_mci_drv_data hi6220_data = { | |
129 | .switch_voltage = dw_mci_hi6220_switch_voltage, | |
130 | .set_ios = dw_mci_hi6220_set_ios, | |
131 | .parse_dt = dw_mci_hi6220_parse_dt, | |
132 | }; | |
133 | ||
036f29d5 ZG |
134 | static const struct of_device_id dw_mci_k3_match[] = { |
135 | { .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, }, | |
0293efdd | 136 | { .compatible = "hisilicon,hi6220-dw-mshc", .data = &hi6220_data, }, |
036f29d5 ZG |
137 | {}, |
138 | }; | |
139 | MODULE_DEVICE_TABLE(of, dw_mci_k3_match); | |
140 | ||
141 | static int dw_mci_k3_probe(struct platform_device *pdev) | |
142 | { | |
143 | const struct dw_mci_drv_data *drv_data; | |
144 | const struct of_device_id *match; | |
145 | ||
146 | match = of_match_node(dw_mci_k3_match, pdev->dev.of_node); | |
147 | drv_data = match->data; | |
148 | ||
149 | return dw_mci_pltfm_register(pdev, drv_data); | |
150 | } | |
151 | ||
370aede6 | 152 | #ifdef CONFIG_PM_SLEEP |
036f29d5 ZG |
153 | static int dw_mci_k3_suspend(struct device *dev) |
154 | { | |
155 | struct dw_mci *host = dev_get_drvdata(dev); | |
156 | int ret; | |
157 | ||
158 | ret = dw_mci_suspend(host); | |
159 | if (!ret) | |
160 | clk_disable_unprepare(host->ciu_clk); | |
161 | ||
162 | return ret; | |
163 | } | |
164 | ||
165 | static int dw_mci_k3_resume(struct device *dev) | |
166 | { | |
167 | struct dw_mci *host = dev_get_drvdata(dev); | |
168 | int ret; | |
169 | ||
170 | ret = clk_prepare_enable(host->ciu_clk); | |
171 | if (ret) { | |
172 | dev_err(host->dev, "failed to enable ciu clock\n"); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | return dw_mci_resume(host); | |
177 | } | |
370aede6 | 178 | #endif /* CONFIG_PM_SLEEP */ |
036f29d5 | 179 | |
85136b74 | 180 | static SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume); |
036f29d5 ZG |
181 | |
182 | static struct platform_driver dw_mci_k3_pltfm_driver = { | |
183 | .probe = dw_mci_k3_probe, | |
184 | .remove = dw_mci_pltfm_remove, | |
185 | .driver = { | |
186 | .name = "dwmmc_k3", | |
187 | .of_match_table = dw_mci_k3_match, | |
188 | .pm = &dw_mci_k3_pmops, | |
189 | }, | |
190 | }; | |
191 | ||
192 | module_platform_driver(dw_mci_k3_pltfm_driver); | |
193 | ||
194 | MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension"); | |
195 | MODULE_LICENSE("GPL v2"); | |
7026fd66 | 196 | MODULE_ALIAS("platform:dwmmc_k3"); |