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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b6147490e6
TMIO MMC chips contain an SD / SDIO IP core from Panasonic, similar to the one, used in MN5774 and other MN57xx controllers. These IP cores are included in many multifunction devices, in sh-mobile chips from Renesas, in the latter case they can also use DMA. Some sh-mobile implementations also have some other specialities, that MFD-based solutions don't have. This makes supporting all these features in a monolithic driver inconveniet and error-prone. This patch splits the driver into 3 parts: the core, the MFD glue and the DMA support. In case of a modular build, two modules will be built: mmc_tmio_core and mmc_tmio. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Chris Ball <cjb@laptop.org>
149 lines
3.1 KiB
C
149 lines
3.1 KiB
C
/*
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* linux/drivers/mmc/host/tmio_mmc.c
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*
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* Copyright (C) 2007 Ian Molton
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* Copyright (C) 2004 Ian Molton
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Driver for the MMC / SD / SDIO cell found in:
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*
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* TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
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*/
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#include <linux/device.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tmio.h>
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#include <linux/mmc/host.h>
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#include <linux/module.h>
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#include <linux/pagemap.h>
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#include <linux/scatterlist.h>
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#include "tmio_mmc.h"
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#ifdef CONFIG_PM
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static int tmio_mmc_suspend(struct platform_device *dev, pm_message_t state)
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{
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const struct mfd_cell *cell = mfd_get_cell(dev);
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struct mmc_host *mmc = platform_get_drvdata(dev);
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int ret;
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ret = mmc_suspend_host(mmc);
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/* Tell MFD core it can disable us now.*/
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if (!ret && cell->disable)
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cell->disable(dev);
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return ret;
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}
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static int tmio_mmc_resume(struct platform_device *dev)
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{
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const struct mfd_cell *cell = mfd_get_cell(dev);
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struct mmc_host *mmc = platform_get_drvdata(dev);
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int ret = 0;
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/* Tell the MFD core we are ready to be enabled */
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if (cell->resume) {
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ret = cell->resume(dev);
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if (ret)
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goto out;
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}
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mmc_resume_host(mmc);
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out:
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return ret;
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}
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#else
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#define tmio_mmc_suspend NULL
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#define tmio_mmc_resume NULL
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#endif
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static int __devinit tmio_mmc_probe(struct platform_device *pdev)
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{
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const struct mfd_cell *cell = mfd_get_cell(pdev);
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struct tmio_mmc_data *pdata;
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struct tmio_mmc_host *host;
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int ret = -EINVAL;
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if (pdev->num_resources != 2)
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goto out;
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pdata = mfd_get_data(pdev);
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if (!pdata || !pdata->hclk)
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goto out;
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/* Tell the MFD core we are ready to be enabled */
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if (cell->enable) {
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ret = cell->enable(pdev);
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if (ret)
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goto out;
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}
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ret = tmio_mmc_host_probe(&host, pdev, pdata);
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if (ret)
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goto cell_disable;
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pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
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(unsigned long)host->ctl, host->irq);
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return 0;
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cell_disable:
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if (cell->disable)
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cell->disable(pdev);
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out:
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return ret;
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}
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static int __devexit tmio_mmc_remove(struct platform_device *pdev)
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{
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const struct mfd_cell *cell = mfd_get_cell(pdev);
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struct mmc_host *mmc = platform_get_drvdata(pdev);
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platform_set_drvdata(pdev, NULL);
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if (mmc) {
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tmio_mmc_host_remove(mmc_priv(mmc));
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if (cell->disable)
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cell->disable(pdev);
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}
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return 0;
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}
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/* ------------------- device registration ----------------------- */
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static struct platform_driver tmio_mmc_driver = {
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.driver = {
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.name = "tmio-mmc",
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.owner = THIS_MODULE,
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},
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.probe = tmio_mmc_probe,
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.remove = __devexit_p(tmio_mmc_remove),
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.suspend = tmio_mmc_suspend,
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.resume = tmio_mmc_resume,
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};
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static int __init tmio_mmc_init(void)
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{
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return platform_driver_register(&tmio_mmc_driver);
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}
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static void __exit tmio_mmc_exit(void)
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{
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platform_driver_unregister(&tmio_mmc_driver);
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}
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module_init(tmio_mmc_init);
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module_exit(tmio_mmc_exit);
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MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver");
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MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:tmio-mmc");
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