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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 02:00:53 +07:00
03d2bfc878
SDHCI driver for Tegra. This driver plugs in as a new variant of sdhci-pltfm, using the platform data structure passed in to specify the GPIOs to use for card detect, write protect and card power enablement. Original driver (of which only the header file is left): Signed-off-by: Yvonne Yip <y@palm.com> The rest, which has been rewritten by now: Signed-off-by: Olof Johansson <olof@lixom.net> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Chris Ball <cjb@laptop.org>
236 lines
6.5 KiB
C
236 lines
6.5 KiB
C
/*
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* sdhci-pltfm.c Support for SDHCI platform devices
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* Copyright (c) 2009 Intel Corporation
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* Supports:
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* SDHCI platform devices
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*
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* Inspired by sdhci-pci.c, by Pierre Ossman
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*/
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#include <linux/delay.h>
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#include <linux/highmem.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <linux/mmc/host.h>
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#include <linux/io.h>
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#include <linux/mmc/sdhci-pltfm.h>
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#include "sdhci.h"
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#include "sdhci-pltfm.h"
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/*****************************************************************************\
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* *
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* SDHCI core callbacks *
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* *
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\*****************************************************************************/
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static struct sdhci_ops sdhci_pltfm_ops = {
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};
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/*****************************************************************************\
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* *
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* Device probing/removal *
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* *
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\*****************************************************************************/
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static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
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{
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const struct platform_device_id *platid = platform_get_device_id(pdev);
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struct sdhci_pltfm_data *pdata;
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struct sdhci_host *host;
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struct sdhci_pltfm_host *pltfm_host;
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struct resource *iomem;
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int ret;
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if (platid && platid->driver_data)
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pdata = (void *)platid->driver_data;
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else
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pdata = pdev->dev.platform_data;
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iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!iomem) {
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ret = -ENOMEM;
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goto err;
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}
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if (resource_size(iomem) < 0x100)
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dev_err(&pdev->dev, "Invalid iomem size. You may "
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"experience problems.\n");
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/* Some PCI-based MFD need the parent here */
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if (pdev->dev.parent != &platform_bus)
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host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
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else
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host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));
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if (IS_ERR(host)) {
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ret = PTR_ERR(host);
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goto err;
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}
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pltfm_host = sdhci_priv(host);
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host->hw_name = "platform";
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if (pdata && pdata->ops)
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host->ops = pdata->ops;
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else
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host->ops = &sdhci_pltfm_ops;
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if (pdata)
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host->quirks = pdata->quirks;
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host->irq = platform_get_irq(pdev, 0);
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if (!request_mem_region(iomem->start, resource_size(iomem),
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mmc_hostname(host->mmc))) {
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dev_err(&pdev->dev, "cannot request region\n");
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ret = -EBUSY;
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goto err_request;
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}
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host->ioaddr = ioremap(iomem->start, resource_size(iomem));
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if (!host->ioaddr) {
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dev_err(&pdev->dev, "failed to remap registers\n");
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ret = -ENOMEM;
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goto err_remap;
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}
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if (pdata && pdata->init) {
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ret = pdata->init(host, pdata);
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if (ret)
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goto err_plat_init;
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}
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ret = sdhci_add_host(host);
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if (ret)
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goto err_add_host;
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platform_set_drvdata(pdev, host);
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return 0;
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err_add_host:
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if (pdata && pdata->exit)
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pdata->exit(host);
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err_plat_init:
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iounmap(host->ioaddr);
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err_remap:
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release_mem_region(iomem->start, resource_size(iomem));
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err_request:
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sdhci_free_host(host);
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err:
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printk(KERN_ERR"Probing of sdhci-pltfm failed: %d\n", ret);
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return ret;
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}
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static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
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{
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struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
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struct sdhci_host *host = platform_get_drvdata(pdev);
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struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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int dead;
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u32 scratch;
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dead = 0;
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scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
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if (scratch == (u32)-1)
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dead = 1;
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sdhci_remove_host(host, dead);
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if (pdata && pdata->exit)
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pdata->exit(host);
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iounmap(host->ioaddr);
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release_mem_region(iomem->start, resource_size(iomem));
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sdhci_free_host(host);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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static const struct platform_device_id sdhci_pltfm_ids[] = {
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{ "sdhci", },
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#ifdef CONFIG_MMC_SDHCI_CNS3XXX
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{ "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata },
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#endif
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#ifdef CONFIG_MMC_SDHCI_ESDHC_IMX
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{ "sdhci-esdhc-imx", (kernel_ulong_t)&sdhci_esdhc_imx_pdata },
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#endif
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#ifdef CONFIG_MMC_SDHCI_DOVE
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{ "sdhci-dove", (kernel_ulong_t)&sdhci_dove_pdata },
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#endif
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#ifdef CONFIG_MMC_SDHCI_TEGRA
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{ "sdhci-tegra", (kernel_ulong_t)&sdhci_tegra_pdata },
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#endif
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{ },
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};
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MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids);
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#ifdef CONFIG_PM
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static int sdhci_pltfm_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct sdhci_host *host = platform_get_drvdata(dev);
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return sdhci_suspend_host(host, state);
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}
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static int sdhci_pltfm_resume(struct platform_device *dev)
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{
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struct sdhci_host *host = platform_get_drvdata(dev);
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return sdhci_resume_host(host);
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}
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#else
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#define sdhci_pltfm_suspend NULL
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#define sdhci_pltfm_resume NULL
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#endif /* CONFIG_PM */
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static struct platform_driver sdhci_pltfm_driver = {
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.driver = {
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.name = "sdhci",
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.owner = THIS_MODULE,
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},
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.probe = sdhci_pltfm_probe,
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.remove = __devexit_p(sdhci_pltfm_remove),
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.id_table = sdhci_pltfm_ids,
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.suspend = sdhci_pltfm_suspend,
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.resume = sdhci_pltfm_resume,
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};
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/*****************************************************************************\
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* *
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* Driver init/exit *
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* *
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\*****************************************************************************/
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static int __init sdhci_drv_init(void)
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{
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return platform_driver_register(&sdhci_pltfm_driver);
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}
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static void __exit sdhci_drv_exit(void)
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{
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platform_driver_unregister(&sdhci_pltfm_driver);
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}
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module_init(sdhci_drv_init);
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module_exit(sdhci_drv_exit);
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MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
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MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
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MODULE_LICENSE("GPL v2");
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