168 lines
3.7 KiB
C
Executable file
168 lines
3.7 KiB
C
Executable file
/*
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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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* Copyright (C) 2017 Renesas Electronics Corporation
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* Copyright (C) 2017 Horms Solutions, Simon Horman
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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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#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_SLEEP
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static int tmio_mmc_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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const struct mfd_cell *cell = mfd_get_cell(pdev);
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int ret;
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ret = pm_runtime_force_suspend(dev);
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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(pdev);
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return ret;
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}
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static int tmio_mmc_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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const struct mfd_cell *cell = mfd_get_cell(pdev);
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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(pdev);
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if (!ret)
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ret = pm_runtime_force_resume(dev);
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return ret;
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}
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#endif
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static int 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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struct resource *res;
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int ret = -EINVAL, irq;
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if (pdev->num_resources != 2)
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goto out;
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pdata = pdev->dev.platform_data;
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if (!pdata || !pdata->hclk)
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goto out;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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ret = irq;
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goto out;
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}
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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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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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ret = -EINVAL;
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goto cell_disable;
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}
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pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
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host = tmio_mmc_host_alloc(pdev, pdata);
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if (IS_ERR(host)) {
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ret = PTR_ERR(host);
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goto cell_disable;
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}
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/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
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host->bus_shift = resource_size(res) >> 10;
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host->mmc->f_max = pdata->hclk;
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host->mmc->f_min = pdata->hclk / 512;
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ret = tmio_mmc_host_probe(host);
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if (ret)
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goto host_free;
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ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq,
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IRQF_TRIGGER_FALLING,
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dev_name(&pdev->dev), host);
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if (ret)
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goto host_remove;
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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, irq);
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return 0;
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host_remove:
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tmio_mmc_host_remove(host);
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host_free:
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tmio_mmc_host_free(host);
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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 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 tmio_mmc_host *host = platform_get_drvdata(pdev);
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tmio_mmc_host_remove(host);
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if (cell->disable)
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cell->disable(pdev);
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return 0;
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}
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/* ------------------- device registration ----------------------- */
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static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_suspend, tmio_mmc_resume)
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SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
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tmio_mmc_host_runtime_resume, NULL)
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};
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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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.pm = &tmio_mmc_dev_pm_ops,
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},
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.probe = tmio_mmc_probe,
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.remove = tmio_mmc_remove,
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};
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module_platform_driver(tmio_mmc_driver);
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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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