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11#include <common.h>
12#include <clk.h>
13#include <dm.h>
14#include <sdhci.h>
15#include <wait_bit.h>
16#include <asm/io.h>
17#include <linux/bitops.h>
18
19
20#define SDCC_MCI_POWER 0x0
21#define SDCC_MCI_POWER_SW_RST BIT(7)
22
23
24#define SDCC_MCI_VERSION 0x50
25#define SDCC_MCI_VERSION_MAJOR_SHIFT 28
26#define SDCC_MCI_VERSION_MAJOR_MASK (0xf << SDCC_MCI_VERSION_MAJOR_SHIFT)
27#define SDCC_MCI_VERSION_MINOR_MASK 0xff
28
29#define SDCC_MCI_STATUS2 0x6C
30#define SDCC_MCI_STATUS2_MCI_ACT 0x1
31#define SDCC_MCI_HC_MODE 0x78
32
33
34#define SDCC_SDHCI_OFFSET 0x900
35
36
37#define SDHCI_VENDOR_SPEC_CAPABILITIES0 0x11c
38
39struct msm_sdhc_plat {
40 struct mmc_config cfg;
41 struct mmc mmc;
42};
43
44struct msm_sdhc {
45 struct sdhci_host host;
46 void *base;
47};
48
49DECLARE_GLOBAL_DATA_PTR;
50
51static int msm_sdc_clk_init(struct udevice *dev)
52{
53 uint clk_rate = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
54 "clock-frequency", 400000);
55 uint clkd[2];
56 int clk_offset;
57 struct udevice *clk_dev;
58 struct clk clk;
59 int ret;
60
61 ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, "clock", clkd,
62 2);
63 if (ret)
64 return ret;
65
66 clk_offset = fdt_node_offset_by_phandle(gd->fdt_blob, clkd[0]);
67 if (clk_offset < 0)
68 return clk_offset;
69
70 ret = uclass_get_device_by_of_offset(UCLASS_CLK, clk_offset, &clk_dev);
71 if (ret)
72 return ret;
73
74 clk.id = clkd[1];
75 ret = clk_request(clk_dev, &clk);
76 if (ret < 0)
77 return ret;
78
79 ret = clk_set_rate(&clk, clk_rate);
80 clk_free(&clk);
81 if (ret < 0)
82 return ret;
83
84 return 0;
85}
86
87static int msm_sdc_probe(struct udevice *dev)
88{
89 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
90 struct msm_sdhc_plat *plat = dev_get_platdata(dev);
91 struct msm_sdhc *prv = dev_get_priv(dev);
92 struct sdhci_host *host = &prv->host;
93 u32 core_version, core_minor, core_major;
94 u32 caps;
95 int ret;
96
97 host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_BROKEN_R1B;
98
99
100 ret = msm_sdc_clk_init(dev);
101 if (ret)
102 return ret;
103
104
105 writel(readl(prv->base + SDCC_MCI_POWER) | SDCC_MCI_POWER_SW_RST,
106 prv->base + SDCC_MCI_POWER);
107
108
109
110 if (wait_for_bit(__func__, prv->base + SDCC_MCI_STATUS2,
111 SDCC_MCI_STATUS2_MCI_ACT, false, 10, false)) {
112 printf("msm_sdhci: reset request failed\n");
113 return -EIO;
114 }
115
116
117 if (wait_for_bit(__func__, prv->base + SDCC_MCI_POWER,
118 SDCC_MCI_POWER_SW_RST, false, 2, false)) {
119 printf("msm_sdhci: stuck in reset\n");
120 return -ETIMEDOUT;
121 }
122
123
124 writel(1, prv->base + SDCC_MCI_HC_MODE);
125
126 core_version = readl(prv->base + SDCC_MCI_VERSION);
127
128 core_major = (core_version & SDCC_MCI_VERSION_MAJOR_MASK);
129 core_major >>= SDCC_MCI_VERSION_MAJOR_SHIFT;
130
131 core_minor = core_version & SDCC_MCI_VERSION_MINOR_MASK;
132
133
134
135
136
137 if (core_major >= 1 && core_minor != 0x11 && core_minor != 0x12) {
138 caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
139 caps |= SDHCI_CAN_VDD_300 | SDHCI_CAN_DO_8BIT;
140 writel(caps, host->ioaddr + SDHCI_VENDOR_SPEC_CAPABILITIES0);
141 }
142
143 ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
144 host->mmc = &plat->mmc;
145 if (ret)
146 return ret;
147 host->mmc->priv = &prv->host;
148 host->mmc->dev = dev;
149 upriv->mmc = host->mmc;
150
151 return sdhci_probe(dev);
152}
153
154static int msm_sdc_remove(struct udevice *dev)
155{
156 struct msm_sdhc *priv = dev_get_priv(dev);
157
158
159 writel(0, priv->base + SDCC_MCI_HC_MODE);
160
161 return 0;
162}
163
164static int msm_ofdata_to_platdata(struct udevice *dev)
165{
166 struct udevice *parent = dev->parent;
167 struct msm_sdhc *priv = dev_get_priv(dev);
168 struct sdhci_host *host = &priv->host;
169
170 host->name = strdup(dev->name);
171 host->ioaddr = (void *)dev_get_addr(dev);
172 host->bus_width = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
173 "bus-width", 4);
174 host->index = fdtdec_get_uint(gd->fdt_blob, dev->of_offset, "index", 0);
175 priv->base = (void *)fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
176 parent->of_offset,
177 dev->of_offset,
178 "reg", 1, NULL,
179 false);
180 if (priv->base == (void *)FDT_ADDR_T_NONE ||
181 host->ioaddr == (void *)FDT_ADDR_T_NONE)
182 return -EINVAL;
183
184 return 0;
185}
186
187static int msm_sdc_bind(struct udevice *dev)
188{
189 struct msm_sdhc_plat *plat = dev_get_platdata(dev);
190
191 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
192}
193
194static const struct udevice_id msm_mmc_ids[] = {
195 { .compatible = "qcom,sdhci-msm-v4" },
196 { }
197};
198
199U_BOOT_DRIVER(msm_sdc_drv) = {
200 .name = "msm_sdc",
201 .id = UCLASS_MMC,
202 .of_match = msm_mmc_ids,
203 .ofdata_to_platdata = msm_ofdata_to_platdata,
204 .ops = &sdhci_ops,
205 .bind = msm_sdc_bind,
206 .probe = msm_sdc_probe,
207 .remove = msm_sdc_remove,
208 .priv_auto_alloc_size = sizeof(struct msm_sdhc),
209 .platdata_auto_alloc_size = sizeof(struct msm_sdhc_plat),
210};
211
