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
27static 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 = pm_runtime_force_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
42static 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 = pm_runtime_force_resume(dev);
54
55	return ret;
56}
57#endif
58
59static 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		ret = -EINVAL;
90		goto cell_disable;
91	}
92
93	pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
94
95	host = tmio_mmc_host_alloc(pdev);
96	if (!host)
97		goto cell_disable;
98
99	/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
100	host->bus_shift = resource_size(res) >> 10;
101
102	ret = tmio_mmc_host_probe(host, pdata);
103	if (ret)
104		goto host_free;
105
106	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq,
107				IRQF_TRIGGER_FALLING,
108				dev_name(&pdev->dev), host);
109	if (ret)
110		goto host_remove;
111
112	pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
113		(unsigned long)host->ctl, irq);
114
115	return 0;
116
117host_remove:
118	tmio_mmc_host_remove(host);
119host_free:
120	tmio_mmc_host_free(host);
121cell_disable:
122	if (cell->disable)
123		cell->disable(pdev);
124out:
125	return ret;
126}
127
128static int tmio_mmc_remove(struct platform_device *pdev)
129{
130	const struct mfd_cell *cell = mfd_get_cell(pdev);
131	struct mmc_host *mmc = platform_get_drvdata(pdev);
132
133	if (mmc) {
134		struct tmio_mmc_host *host = mmc_priv(mmc);
135		tmio_mmc_host_remove(host);
136		if (cell->disable)
137			cell->disable(pdev);
138	}
139
140	return 0;
141}
142
143/* ------------------- device registration ----------------------- */
144
145static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
146	SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_suspend, tmio_mmc_resume)
147	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
148			tmio_mmc_host_runtime_resume,
149			NULL)
150};
151
152static struct platform_driver tmio_mmc_driver = {
153	.driver = {
154		.name = "tmio-mmc",
155		.pm = &tmio_mmc_dev_pm_ops,
156	},
157	.probe = tmio_mmc_probe,
158	.remove = tmio_mmc_remove,
159};
160
161module_platform_driver(tmio_mmc_driver);
162
163MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver");
164MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
165MODULE_LICENSE("GPL v2");
166MODULE_ALIAS("platform:tmio-mmc");
167