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
 27static int tmio_mmc_suspend(struct platform_device *dev, pm_message_t state)
 28{
 29	const struct mfd_cell *cell = mfd_get_cell(dev);
 30	int ret;
 31
 32	ret = tmio_mmc_host_suspend(&dev->dev);
 33
 34	/* Tell MFD core it can disable us now.*/
 35	if (!ret && cell->disable)
 36		cell->disable(dev);
 37
 38	return ret;
 39}
 40
 41static int tmio_mmc_resume(struct platform_device *dev)
 42{
 43	const struct mfd_cell *cell = mfd_get_cell(dev);
 44	int ret = 0;
 45
 46	/* Tell the MFD core we are ready to be enabled */
 47	if (cell->resume)
 48		ret = cell->resume(dev);
 49
 50	if (!ret)
 51		ret = tmio_mmc_host_resume(&dev->dev);
 52
 53	return ret;
 54}
 55#else
 56#define tmio_mmc_suspend NULL
 57#define tmio_mmc_resume NULL
 58#endif
 59
 60static int __devinit tmio_mmc_probe(struct platform_device *pdev)
 61{
 62	const struct mfd_cell *cell = mfd_get_cell(pdev);
 63	struct tmio_mmc_data *pdata;
 64	struct tmio_mmc_host *host;
 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	ret = tmio_mmc_host_probe(&host, pdev, pdata);
 88	if (ret)
 89		goto cell_disable;
 90
 91	ret = request_irq(irq, tmio_mmc_irq, IRQF_DISABLED |
 92			  IRQF_TRIGGER_FALLING, dev_name(&pdev->dev), host);
 93	if (ret)
 94		goto host_remove;
 95
 96	pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
 97		(unsigned long)host->ctl, irq);
 98
 99	return 0;
100
101host_remove:
102	tmio_mmc_host_remove(host);
103cell_disable:
104	if (cell->disable)
105		cell->disable(pdev);
106out:
107	return ret;
108}
109
110static int __devexit tmio_mmc_remove(struct platform_device *pdev)
111{
112	const struct mfd_cell *cell = mfd_get_cell(pdev);
113	struct mmc_host *mmc = platform_get_drvdata(pdev);
114
115	platform_set_drvdata(pdev, NULL);
116
117	if (mmc) {
118		struct tmio_mmc_host *host = mmc_priv(mmc);
119		free_irq(platform_get_irq(pdev, 0), host);
120		tmio_mmc_host_remove(host);
121		if (cell->disable)
122			cell->disable(pdev);
123	}
124
125	return 0;
126}
127
128/* ------------------- device registration ----------------------- */
129
130static struct platform_driver tmio_mmc_driver = {
131	.driver = {
132		.name = "tmio-mmc",
133		.owner = THIS_MODULE,
134	},
135	.probe = tmio_mmc_probe,
136	.remove = __devexit_p(tmio_mmc_remove),
137	.suspend = tmio_mmc_suspend,
138	.resume = tmio_mmc_resume,
139};
140
141
142static int __init tmio_mmc_init(void)
143{
144	return platform_driver_register(&tmio_mmc_driver);
145}
146
147static void __exit tmio_mmc_exit(void)
148{
149	platform_driver_unregister(&tmio_mmc_driver);
150}
151
152module_init(tmio_mmc_init);
153module_exit(tmio_mmc_exit);
154
155MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver");
156MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
157MODULE_LICENSE("GPL v2");
158MODULE_ALIAS("platform:tmio-mmc");