drivercore: revert addition of of_match to struct device
[omap4-v4l2-camera:auto-amcs-omap4-v4l2-camera.git] / drivers / mmc / host / sdhci-of-core.c
1 /*
2  * OpenFirmware bindings for Secure Digital Host Controller Interface.
3  *
4  * Copyright (c) 2007 Freescale Semiconductor, Inc.
5  * Copyright (c) 2009 MontaVista Software, Inc.
6  *
7  * Authors: Xiaobo Xie <X.Xie@freescale.com>
8  *          Anton Vorontsov <avorontsov@ru.mvista.com>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or (at
13  * your option) any later version.
14  */
15
16 #include <linux/err.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/io.h>
20 #include <linux/interrupt.h>
21 #include <linux/delay.h>
22 #include <linux/of.h>
23 #include <linux/of_platform.h>
24 #include <linux/of_address.h>
25 #include <linux/of_irq.h>
26 #include <linux/mmc/host.h>
27 #ifdef CONFIG_PPC
28 #include <asm/machdep.h>
29 #endif
30 #include "sdhci-of.h"
31 #include "sdhci.h"
32
33 #ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
34
35 /*
36  * These accessors are designed for big endian hosts doing I/O to
37  * little endian controllers incorporating a 32-bit hardware byte swapper.
38  */
39
40 u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
41 {
42         return in_be32(host->ioaddr + reg);
43 }
44
45 u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
46 {
47         return in_be16(host->ioaddr + (reg ^ 0x2));
48 }
49
50 u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
51 {
52         return in_8(host->ioaddr + (reg ^ 0x3));
53 }
54
55 void sdhci_be32bs_writel(struct sdhci_host *host, u32 val, int reg)
56 {
57         out_be32(host->ioaddr + reg, val);
58 }
59
60 void sdhci_be32bs_writew(struct sdhci_host *host, u16 val, int reg)
61 {
62         struct sdhci_of_host *of_host = sdhci_priv(host);
63         int base = reg & ~0x3;
64         int shift = (reg & 0x2) * 8;
65
66         switch (reg) {
67         case SDHCI_TRANSFER_MODE:
68                 /*
69                  * Postpone this write, we must do it together with a
70                  * command write that is down below.
71                  */
72                 of_host->xfer_mode_shadow = val;
73                 return;
74         case SDHCI_COMMAND:
75                 sdhci_be32bs_writel(host, val << 16 | of_host->xfer_mode_shadow,
76                                     SDHCI_TRANSFER_MODE);
77                 return;
78         }
79         clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
80 }
81
82 void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
83 {
84         int base = reg & ~0x3;
85         int shift = (reg & 0x3) * 8;
86
87         clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
88 }
89 #endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
90
91 #ifdef CONFIG_PM
92
93 static int sdhci_of_suspend(struct platform_device *ofdev, pm_message_t state)
94 {
95         struct sdhci_host *host = dev_get_drvdata(&ofdev->dev);
96
97         return mmc_suspend_host(host->mmc);
98 }
99
100 static int sdhci_of_resume(struct platform_device *ofdev)
101 {
102         struct sdhci_host *host = dev_get_drvdata(&ofdev->dev);
103
104         return mmc_resume_host(host->mmc);
105 }
106
107 #else
108
109 #define sdhci_of_suspend NULL
110 #define sdhci_of_resume NULL
111
112 #endif
113
114 static bool __devinit sdhci_of_wp_inverted(struct device_node *np)
115 {
116         if (of_get_property(np, "sdhci,wp-inverted", NULL))
117                 return true;
118
119         /* Old device trees don't have the wp-inverted property. */
120 #ifdef CONFIG_PPC
121         return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
122 #else
123         return false;
124 #endif
125 }
126
127 static const struct of_device_id sdhci_of_match[];
128 static int __devinit sdhci_of_probe(struct platform_device *ofdev)
129 {
130         const struct of_device_id *match;
131         struct device_node *np = ofdev->dev.of_node;
132         struct sdhci_of_data *sdhci_of_data;
133         struct sdhci_host *host;
134         struct sdhci_of_host *of_host;
135         const __be32 *clk;
136         int size;
137         int ret;
138
139         match = of_match_device(sdhci_of_match, &ofdev->dev);
140         if (!match)
141                 return -EINVAL;
142         sdhci_of_data = match->data;
143
144         if (!of_device_is_available(np))
145                 return -ENODEV;
146
147         host = sdhci_alloc_host(&ofdev->dev, sizeof(*of_host));
148         if (IS_ERR(host))
149                 return -ENOMEM;
150
151         of_host = sdhci_priv(host);
152         dev_set_drvdata(&ofdev->dev, host);
153
154         host->ioaddr = of_iomap(np, 0);
155         if (!host->ioaddr) {
156                 ret = -ENOMEM;
157                 goto err_addr_map;
158         }
159
160         host->irq = irq_of_parse_and_map(np, 0);
161         if (!host->irq) {
162                 ret = -EINVAL;
163                 goto err_no_irq;
164         }
165
166         host->hw_name = dev_name(&ofdev->dev);
167         if (sdhci_of_data) {
168                 host->quirks = sdhci_of_data->quirks;
169                 host->ops = &sdhci_of_data->ops;
170         }
171
172         if (of_get_property(np, "sdhci,auto-cmd12", NULL))
173                 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
174
175
176         if (of_get_property(np, "sdhci,1-bit-only", NULL))
177                 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
178
179         if (sdhci_of_wp_inverted(np))
180                 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
181
182         clk = of_get_property(np, "clock-frequency", &size);
183         if (clk && size == sizeof(*clk) && *clk)
184                 of_host->clock = be32_to_cpup(clk);
185
186         ret = sdhci_add_host(host);
187         if (ret)
188                 goto err_add_host;
189
190         return 0;
191
192 err_add_host:
193         irq_dispose_mapping(host->irq);
194 err_no_irq:
195         iounmap(host->ioaddr);
196 err_addr_map:
197         sdhci_free_host(host);
198         return ret;
199 }
200
201 static int __devexit sdhci_of_remove(struct platform_device *ofdev)
202 {
203         struct sdhci_host *host = dev_get_drvdata(&ofdev->dev);
204
205         sdhci_remove_host(host, 0);
206         sdhci_free_host(host);
207         irq_dispose_mapping(host->irq);
208         iounmap(host->ioaddr);
209         return 0;
210 }
211
212 static const struct of_device_id sdhci_of_match[] = {
213 #ifdef CONFIG_MMC_SDHCI_OF_ESDHC
214         { .compatible = "fsl,mpc8379-esdhc", .data = &sdhci_esdhc, },
215         { .compatible = "fsl,mpc8536-esdhc", .data = &sdhci_esdhc, },
216         { .compatible = "fsl,esdhc", .data = &sdhci_esdhc, },
217 #endif
218 #ifdef CONFIG_MMC_SDHCI_OF_HLWD
219         { .compatible = "nintendo,hollywood-sdhci", .data = &sdhci_hlwd, },
220 #endif
221         { .compatible = "generic-sdhci", },
222         {},
223 };
224 MODULE_DEVICE_TABLE(of, sdhci_of_match);
225
226 static struct platform_driver sdhci_of_driver = {
227         .driver = {
228                 .name = "sdhci-of",
229                 .owner = THIS_MODULE,
230                 .of_match_table = sdhci_of_match,
231         },
232         .probe = sdhci_of_probe,
233         .remove = __devexit_p(sdhci_of_remove),
234         .suspend = sdhci_of_suspend,
235         .resume = sdhci_of_resume,
236 };
237
238 static int __init sdhci_of_init(void)
239 {
240         return platform_driver_register(&sdhci_of_driver);
241 }
242 module_init(sdhci_of_init);
243
244 static void __exit sdhci_of_exit(void)
245 {
246         platform_driver_unregister(&sdhci_of_driver);
247 }
248 module_exit(sdhci_of_exit);
249
250 MODULE_DESCRIPTION("Secure Digital Host Controller Interface OF driver");
251 MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, "
252               "Anton Vorontsov <avorontsov@ru.mvista.com>");
253 MODULE_LICENSE("GPL");