summaryrefslogtreecommitdiffstats
path: root/drivers/mmc/host/tmio_mmc.c
blob: f746df493892c160a9623b9687c17c81dadcd66e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*
 * linux/drivers/mmc/host/tmio_mmc.c
 *
 * Copyright (C) 2007 Ian Molton
 * Copyright (C) 2004 Ian Molton
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Driver for the MMC / SD / SDIO cell found in:
 *
 * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
 */

#include <linux/device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tmio.h>
#include <linux/mmc/host.h>
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/scatterlist.h>

#include "tmio_mmc.h"

#ifdef CONFIG_PM_SLEEP
static int tmio_mmc_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	const struct mfd_cell *cell = mfd_get_cell(pdev);
	int ret;

	ret = pm_runtime_force_suspend(dev);

	/* Tell MFD core it can disable us now.*/
	if (!ret && cell->disable)
		cell->disable(pdev);

	return ret;
}

static int tmio_mmc_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	const struct mfd_cell *cell = mfd_get_cell(pdev);
	int ret = 0;

	/* Tell the MFD core we are ready to be enabled */
	if (cell->resume)
		ret = cell->resume(pdev);

	if (!ret)
		ret = pm_runtime_force_resume(dev);

	return ret;
}
#endif

static int tmio_mmc_probe(struct platform_device *pdev)
{
	const struct mfd_cell *cell = mfd_get_cell(pdev);
	struct tmio_mmc_data *pdata;
	struct tmio_mmc_host *host;
	struct resource *res;
	int ret = -EINVAL, irq;

	if (pdev->num_resources != 2)
		goto out;

	pdata = pdev->dev.platform_data;
	if (!pdata || !pdata->hclk)
		goto out;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = irq;
		goto out;
	}

	/* Tell the MFD core we are ready to be enabled */
	if (cell->enable) {
		ret = cell->enable(pdev);
		if (ret)
			goto out;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -EINVAL;

	pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;

	host = tmio_mmc_host_alloc(pdev);
	if (!host)
		goto cell_disable;

	/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
	host->bus_shift = resource_size(res) >> 10;

	ret = tmio_mmc_host_probe(host, pdata);
	if (ret)
		goto host_free;

	ret = request_irq(irq, tmio_mmc_irq, IRQF_TRIGGER_FALLING,
				dev_name(&pdev->dev), host);
	if (ret)
		goto host_remove;

	pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
		(unsigned long)host->ctl, irq);

	return 0;

host_remove:
	tmio_mmc_host_remove(host);
host_free:
	tmio_mmc_host_free(host);
cell_disable:
	if (cell->disable)
		cell->disable(pdev);
out:
	return ret;
}

static int tmio_mmc_remove(struct platform_device *pdev)
{
	const struct mfd_cell *cell = mfd_get_cell(pdev);
	struct mmc_host *mmc = platform_get_drvdata(pdev);

	if (mmc) {
		struct tmio_mmc_host *host = mmc_priv(mmc);
		free_irq(platform_get_irq(pdev, 0), host);
		tmio_mmc_host_remove(host);
		if (cell->disable)
			cell->disable(pdev);
	}

	return 0;
}

/* ------------------- device registration ----------------------- */

static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_suspend, tmio_mmc_resume)
	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
			tmio_mmc_host_runtime_resume,
			NULL)
};

static struct platform_driver tmio_mmc_driver = {
	.driver = {
		.name = "tmio-mmc",
		.pm = &tmio_mmc_dev_pm_ops,
	},
	.probe = tmio_mmc_probe,
	.remove = tmio_mmc_remove,
};

module_platform_driver(tmio_mmc_driver);

MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver");
MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tmio-mmc");
OpenPOWER on IntegriCloud