165 lines
3.6 KiB
C
165 lines
3.6 KiB
C
/*
|
|
* 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");
|