blob: 55e33135edb4dbc60b800e9207b7ae1b0e3b8139 [file] [log] [blame]
Anton Vorontsov3085e9c2009-03-17 00:14:05 +03001/*
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/module.h>
17#include <linux/init.h>
18#include <linux/io.h>
19#include <linux/interrupt.h>
20#include <linux/delay.h>
21#include <linux/of.h>
22#include <linux/of_platform.h>
23#include <linux/mmc/host.h>
Anton Vorontsov8226a212009-09-22 16:45:15 -070024#include <asm/machdep.h>
Albert Herranz7657c3a2009-12-17 15:27:20 -080025#include "sdhci-of.h"
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030026#include "sdhci.h"
27
Albert Herranz7657c3a2009-12-17 15:27:20 -080028#ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030029
30/*
Albert Herranz7657c3a2009-12-17 15:27:20 -080031 * These accessors are designed for big endian hosts doing I/O to
32 * little endian controllers incorporating a 32-bit hardware byte swapper.
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030033 */
34
Albert Herranz7657c3a2009-12-17 15:27:20 -080035u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030036{
37 return in_be32(host->ioaddr + reg);
38}
39
Albert Herranz7657c3a2009-12-17 15:27:20 -080040u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030041{
Albert Herranz7657c3a2009-12-17 15:27:20 -080042 return in_be16(host->ioaddr + (reg ^ 0x2));
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030043}
44
Albert Herranz7657c3a2009-12-17 15:27:20 -080045u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030046{
47 return in_8(host->ioaddr + (reg ^ 0x3));
48}
49
Albert Herranz7657c3a2009-12-17 15:27:20 -080050void sdhci_be32bs_writel(struct sdhci_host *host, u32 val, int reg)
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030051{
52 out_be32(host->ioaddr + reg, val);
53}
54
Albert Herranz7657c3a2009-12-17 15:27:20 -080055void sdhci_be32bs_writew(struct sdhci_host *host, u16 val, int reg)
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030056{
57 struct sdhci_of_host *of_host = sdhci_priv(host);
58 int base = reg & ~0x3;
59 int shift = (reg & 0x2) * 8;
60
61 switch (reg) {
62 case SDHCI_TRANSFER_MODE:
63 /*
64 * Postpone this write, we must do it together with a
65 * command write that is down below.
66 */
67 of_host->xfer_mode_shadow = val;
68 return;
69 case SDHCI_COMMAND:
Albert Herranz7657c3a2009-12-17 15:27:20 -080070 sdhci_be32bs_writel(host, val << 16 | of_host->xfer_mode_shadow,
71 SDHCI_TRANSFER_MODE);
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030072 return;
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030073 }
74 clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
75}
76
Albert Herranz7657c3a2009-12-17 15:27:20 -080077void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030078{
79 int base = reg & ~0x3;
80 int shift = (reg & 0x3) * 8;
81
82 clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
83}
Albert Herranz7657c3a2009-12-17 15:27:20 -080084#endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
Anton Vorontsov3085e9c2009-03-17 00:14:05 +030085
86#ifdef CONFIG_PM
87
88static int sdhci_of_suspend(struct of_device *ofdev, pm_message_t state)
89{
90 struct sdhci_host *host = dev_get_drvdata(&ofdev->dev);
91
92 return mmc_suspend_host(host->mmc, state);
93}
94
95static int sdhci_of_resume(struct of_device *ofdev)
96{
97 struct sdhci_host *host = dev_get_drvdata(&ofdev->dev);
98
99 return mmc_resume_host(host->mmc);
100}
101
102#else
103
104#define sdhci_of_suspend NULL
105#define sdhci_of_resume NULL
106
107#endif
108
Anton Vorontsov8226a212009-09-22 16:45:15 -0700109static bool __devinit sdhci_of_wp_inverted(struct device_node *np)
110{
111 if (of_get_property(np, "sdhci,wp-inverted", NULL))
112 return true;
113
114 /* Old device trees don't have the wp-inverted property. */
115 return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
116}
117
Anton Vorontsov3085e9c2009-03-17 00:14:05 +0300118static int __devinit sdhci_of_probe(struct of_device *ofdev,
119 const struct of_device_id *match)
120{
121 struct device_node *np = ofdev->node;
122 struct sdhci_of_data *sdhci_of_data = match->data;
123 struct sdhci_host *host;
124 struct sdhci_of_host *of_host;
125 const u32 *clk;
126 int size;
127 int ret;
128
129 if (!of_device_is_available(np))
130 return -ENODEV;
131
132 host = sdhci_alloc_host(&ofdev->dev, sizeof(*of_host));
Julia Lawall2198a642009-08-06 15:07:41 -0700133 if (IS_ERR(host))
Anton Vorontsov3085e9c2009-03-17 00:14:05 +0300134 return -ENOMEM;
135
136 of_host = sdhci_priv(host);
137 dev_set_drvdata(&ofdev->dev, host);
138
139 host->ioaddr = of_iomap(np, 0);
140 if (!host->ioaddr) {
141 ret = -ENOMEM;
142 goto err_addr_map;
143 }
144
145 host->irq = irq_of_parse_and_map(np, 0);
146 if (!host->irq) {
147 ret = -EINVAL;
148 goto err_no_irq;
149 }
150
151 host->hw_name = dev_name(&ofdev->dev);
152 if (sdhci_of_data) {
153 host->quirks = sdhci_of_data->quirks;
154 host->ops = &sdhci_of_data->ops;
155 }
156
Anton Vorontsov5fe23c72009-06-18 00:14:08 +0400157 if (of_get_property(np, "sdhci,1-bit-only", NULL))
158 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
159
Anton Vorontsov8226a212009-09-22 16:45:15 -0700160 if (sdhci_of_wp_inverted(np))
161 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
162
Anton Vorontsov3085e9c2009-03-17 00:14:05 +0300163 clk = of_get_property(np, "clock-frequency", &size);
164 if (clk && size == sizeof(*clk) && *clk)
165 of_host->clock = *clk;
166
167 ret = sdhci_add_host(host);
168 if (ret)
169 goto err_add_host;
170
171 return 0;
172
173err_add_host:
174 irq_dispose_mapping(host->irq);
175err_no_irq:
176 iounmap(host->ioaddr);
177err_addr_map:
178 sdhci_free_host(host);
179 return ret;
180}
181
182static int __devexit sdhci_of_remove(struct of_device *ofdev)
183{
184 struct sdhci_host *host = dev_get_drvdata(&ofdev->dev);
185
186 sdhci_remove_host(host, 0);
187 sdhci_free_host(host);
188 irq_dispose_mapping(host->irq);
189 iounmap(host->ioaddr);
190 return 0;
191}
192
193static const struct of_device_id sdhci_of_match[] = {
Albert Herranz7657c3a2009-12-17 15:27:20 -0800194#ifdef CONFIG_MMC_SDHCI_OF_ESDHC
Anton Vorontsov3085e9c2009-03-17 00:14:05 +0300195 { .compatible = "fsl,mpc8379-esdhc", .data = &sdhci_esdhc, },
196 { .compatible = "fsl,mpc8536-esdhc", .data = &sdhci_esdhc, },
Kumar Gala992697e2009-05-08 08:52:49 -0500197 { .compatible = "fsl,esdhc", .data = &sdhci_esdhc, },
Albert Herranz7657c3a2009-12-17 15:27:20 -0800198#endif
Albert Herranz1144ab52009-12-17 15:27:20 -0800199#ifdef CONFIG_MMC_SDHCI_OF_HLWD
200 { .compatible = "nintendo,hollywood-sdhci", .data = &sdhci_hlwd, },
201#endif
Anton Vorontsov3085e9c2009-03-17 00:14:05 +0300202 { .compatible = "generic-sdhci", },
203 {},
204};
205MODULE_DEVICE_TABLE(of, sdhci_of_match);
206
207static struct of_platform_driver sdhci_of_driver = {
208 .driver.name = "sdhci-of",
209 .match_table = sdhci_of_match,
210 .probe = sdhci_of_probe,
211 .remove = __devexit_p(sdhci_of_remove),
212 .suspend = sdhci_of_suspend,
213 .resume = sdhci_of_resume,
214};
215
216static int __init sdhci_of_init(void)
217{
218 return of_register_platform_driver(&sdhci_of_driver);
219}
220module_init(sdhci_of_init);
221
222static void __exit sdhci_of_exit(void)
223{
224 of_unregister_platform_driver(&sdhci_of_driver);
225}
226module_exit(sdhci_of_exit);
227
228MODULE_DESCRIPTION("Secure Digital Host Controller Interface OF driver");
229MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, "
230 "Anton Vorontsov <avorontsov@ru.mvista.com>");
231MODULE_LICENSE("GPL");