Merge branch 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux...
[deliverable/linux.git] / drivers / mmc / host / tmio_mmc.c
1 /*
2 * linux/drivers/mmc/host/tmio_mmc.c
3 *
4 * Copyright (C) 2007 Ian Molton
5 * Copyright (C) 2004 Ian Molton
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Driver for the MMC / SD / SDIO cell found in:
12 *
13 * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
14 */
15
16 #include <linux/device.h>
17 #include <linux/mfd/core.h>
18 #include <linux/mfd/tmio.h>
19 #include <linux/mmc/host.h>
20 #include <linux/module.h>
21 #include <linux/pagemap.h>
22 #include <linux/scatterlist.h>
23
24 #include "tmio_mmc.h"
25
26 #ifdef CONFIG_PM_SLEEP
27 static int tmio_mmc_suspend(struct device *dev)
28 {
29 struct platform_device *pdev = to_platform_device(dev);
30 const struct mfd_cell *cell = mfd_get_cell(pdev);
31 int ret;
32
33 ret = tmio_mmc_host_suspend(dev);
34
35 /* Tell MFD core it can disable us now.*/
36 if (!ret && cell->disable)
37 cell->disable(pdev);
38
39 return ret;
40 }
41
42 static int tmio_mmc_resume(struct device *dev)
43 {
44 struct platform_device *pdev = to_platform_device(dev);
45 const struct mfd_cell *cell = mfd_get_cell(pdev);
46 int ret = 0;
47
48 /* Tell the MFD core we are ready to be enabled */
49 if (cell->resume)
50 ret = cell->resume(pdev);
51
52 if (!ret)
53 ret = tmio_mmc_host_resume(dev);
54
55 return ret;
56 }
57 #endif
58
59 static int tmio_mmc_probe(struct platform_device *pdev)
60 {
61 const struct mfd_cell *cell = mfd_get_cell(pdev);
62 struct tmio_mmc_data *pdata;
63 struct tmio_mmc_host *host;
64 struct resource *res;
65 int ret = -EINVAL, irq;
66
67 if (pdev->num_resources != 2)
68 goto out;
69
70 pdata = pdev->dev.platform_data;
71 if (!pdata || !pdata->hclk)
72 goto out;
73
74 irq = platform_get_irq(pdev, 0);
75 if (irq < 0) {
76 ret = irq;
77 goto out;
78 }
79
80 /* Tell the MFD core we are ready to be enabled */
81 if (cell->enable) {
82 ret = cell->enable(pdev);
83 if (ret)
84 goto out;
85 }
86
87 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
88 if (!res)
89 return -EINVAL;
90
91 /* SD control register space size is 0x200, 0x400 for bus_shift=1 */
92 pdata->bus_shift = resource_size(res) >> 10;
93 pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
94
95 ret = tmio_mmc_host_probe(&host, pdev, pdata);
96 if (ret)
97 goto cell_disable;
98
99 ret = request_irq(irq, tmio_mmc_irq, IRQF_TRIGGER_FALLING,
100 dev_name(&pdev->dev), host);
101 if (ret)
102 goto host_remove;
103
104 pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
105 (unsigned long)host->ctl, irq);
106
107 return 0;
108
109 host_remove:
110 tmio_mmc_host_remove(host);
111 cell_disable:
112 if (cell->disable)
113 cell->disable(pdev);
114 out:
115 return ret;
116 }
117
118 static int tmio_mmc_remove(struct platform_device *pdev)
119 {
120 const struct mfd_cell *cell = mfd_get_cell(pdev);
121 struct mmc_host *mmc = platform_get_drvdata(pdev);
122
123 if (mmc) {
124 struct tmio_mmc_host *host = mmc_priv(mmc);
125 free_irq(platform_get_irq(pdev, 0), host);
126 tmio_mmc_host_remove(host);
127 if (cell->disable)
128 cell->disable(pdev);
129 }
130
131 return 0;
132 }
133
134 /* ------------------- device registration ----------------------- */
135
136 static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
137 SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_suspend, tmio_mmc_resume)
138 };
139
140 static struct platform_driver tmio_mmc_driver = {
141 .driver = {
142 .name = "tmio-mmc",
143 .owner = THIS_MODULE,
144 .pm = &tmio_mmc_dev_pm_ops,
145 },
146 .probe = tmio_mmc_probe,
147 .remove = tmio_mmc_remove,
148 };
149
150 module_platform_driver(tmio_mmc_driver);
151
152 MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver");
153 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
154 MODULE_LICENSE("GPL v2");
155 MODULE_ALIAS("platform:tmio-mmc");
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