271 lines
6.9 KiB
C
271 lines
6.9 KiB
C
/*
|
|
* sdhci-pltfm.c Support for SDHCI platform devices
|
|
* Copyright (c) 2009 Intel Corporation
|
|
*
|
|
* Copyright (c) 2007, 2011 Freescale Semiconductor, Inc.
|
|
* Copyright (c) 2009 MontaVista Software, Inc.
|
|
*
|
|
* Authors: Xiaobo Xie <X.Xie@freescale.com>
|
|
* Anton Vorontsov <avorontsov@ru.mvista.com>
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
/* Supports:
|
|
* SDHCI platform devices
|
|
*
|
|
* Inspired by sdhci-pci.c, by Pierre Ossman
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#ifdef CONFIG_PPC
|
|
#include <asm/machdep.h>
|
|
#endif
|
|
#include "sdhci-pltfm.h"
|
|
|
|
unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host)
|
|
{
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
|
|
return clk_get_rate(pltfm_host->clk);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sdhci_pltfm_clk_get_max_clock);
|
|
|
|
static const struct sdhci_ops sdhci_pltfm_ops = {
|
|
.set_clock = sdhci_set_clock,
|
|
.set_bus_width = sdhci_set_bus_width,
|
|
.reset = sdhci_reset,
|
|
.set_uhs_signaling = sdhci_set_uhs_signaling,
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static bool sdhci_of_wp_inverted(struct device_node *np)
|
|
{
|
|
if (of_get_property(np, "sdhci,wp-inverted", NULL) ||
|
|
of_get_property(np, "wp-inverted", NULL))
|
|
return true;
|
|
|
|
/* Old device trees don't have the wp-inverted property. */
|
|
#ifdef CONFIG_PPC
|
|
return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
|
|
#else
|
|
return false;
|
|
#endif /* CONFIG_PPC */
|
|
}
|
|
|
|
void sdhci_get_of_property(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct sdhci_host *host = platform_get_drvdata(pdev);
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
u32 bus_width;
|
|
|
|
if (of_get_property(np, "sdhci,auto-cmd12", NULL))
|
|
host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
|
|
|
|
if (of_get_property(np, "sdhci,1-bit-only", NULL) ||
|
|
(of_property_read_u32(np, "bus-width", &bus_width) == 0 &&
|
|
bus_width == 1))
|
|
host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
|
|
|
|
if (sdhci_of_wp_inverted(np))
|
|
host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
|
|
|
|
if (of_get_property(np, "broken-cd", NULL))
|
|
host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
|
|
|
|
if (of_get_property(np, "no-1-8-v", NULL))
|
|
host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
|
|
|
|
if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))
|
|
host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
|
|
|
|
if (of_device_is_compatible(np, "fsl,p2020-esdhc") ||
|
|
of_device_is_compatible(np, "fsl,p1010-esdhc") ||
|
|
of_device_is_compatible(np, "fsl,t4240-esdhc") ||
|
|
of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
|
|
host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
|
|
|
|
of_property_read_u32(np, "clock-frequency", &pltfm_host->clock);
|
|
|
|
if (of_find_property(np, "keep-power-in-suspend", NULL))
|
|
host->mmc->pm_caps |= MMC_PM_KEEP_POWER;
|
|
|
|
if (of_property_read_bool(np, "wakeup-source") ||
|
|
of_property_read_bool(np, "enable-sdio-wakeup")) /* legacy */
|
|
host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
|
|
}
|
|
#else
|
|
void sdhci_get_of_property(struct platform_device *pdev) {}
|
|
#endif /* CONFIG_OF */
|
|
EXPORT_SYMBOL_GPL(sdhci_get_of_property);
|
|
|
|
struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
|
|
const struct sdhci_pltfm_data *pdata,
|
|
size_t priv_size)
|
|
{
|
|
struct sdhci_host *host;
|
|
struct resource *iomem;
|
|
void __iomem *ioaddr;
|
|
int irq, ret;
|
|
|
|
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
ioaddr = devm_ioremap_resource(&pdev->dev, iomem);
|
|
if (IS_ERR(ioaddr)) {
|
|
ret = PTR_ERR(ioaddr);
|
|
goto err;
|
|
}
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
dev_err(&pdev->dev, "failed to get IRQ number\n");
|
|
ret = irq;
|
|
goto err;
|
|
}
|
|
|
|
host = sdhci_alloc_host(&pdev->dev,
|
|
sizeof(struct sdhci_pltfm_host) + priv_size);
|
|
|
|
if (IS_ERR(host)) {
|
|
ret = PTR_ERR(host);
|
|
goto err;
|
|
}
|
|
|
|
host->ioaddr = ioaddr;
|
|
host->irq = irq;
|
|
host->hw_name = dev_name(&pdev->dev);
|
|
if (pdata && pdata->ops)
|
|
host->ops = pdata->ops;
|
|
else
|
|
host->ops = &sdhci_pltfm_ops;
|
|
if (pdata) {
|
|
host->quirks = pdata->quirks;
|
|
host->quirks2 = pdata->quirks2;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, host);
|
|
|
|
return host;
|
|
err:
|
|
dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
|
|
return ERR_PTR(ret);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
|
|
|
|
void sdhci_pltfm_free(struct platform_device *pdev)
|
|
{
|
|
struct sdhci_host *host = platform_get_drvdata(pdev);
|
|
|
|
sdhci_free_host(host);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
|
|
|
|
int sdhci_pltfm_register(struct platform_device *pdev,
|
|
const struct sdhci_pltfm_data *pdata,
|
|
size_t priv_size)
|
|
{
|
|
struct sdhci_host *host;
|
|
int ret = 0;
|
|
|
|
host = sdhci_pltfm_init(pdev, pdata, priv_size);
|
|
if (IS_ERR(host))
|
|
return PTR_ERR(host);
|
|
|
|
sdhci_get_of_property(pdev);
|
|
|
|
ret = sdhci_add_host(host);
|
|
if (ret)
|
|
sdhci_pltfm_free(pdev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
|
|
|
|
int sdhci_pltfm_unregister(struct platform_device *pdev)
|
|
{
|
|
struct sdhci_host *host = platform_get_drvdata(pdev);
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
|
|
|
|
sdhci_remove_host(host, dead);
|
|
clk_disable_unprepare(pltfm_host->clk);
|
|
sdhci_pltfm_free(pdev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
int sdhci_pltfm_suspend(struct device *dev)
|
|
{
|
|
struct sdhci_host *host = dev_get_drvdata(dev);
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
int ret;
|
|
|
|
if (host->tuning_mode != SDHCI_TUNING_MODE_3)
|
|
mmc_retune_needed(host->mmc);
|
|
|
|
ret = sdhci_suspend_host(host);
|
|
if (ret)
|
|
return ret;
|
|
|
|
clk_disable_unprepare(pltfm_host->clk);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend);
|
|
|
|
int sdhci_pltfm_resume(struct device *dev)
|
|
{
|
|
struct sdhci_host *host = dev_get_drvdata(dev);
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(pltfm_host->clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = sdhci_resume_host(host);
|
|
if (ret)
|
|
clk_disable_unprepare(pltfm_host->clk);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sdhci_pltfm_resume);
|
|
#endif
|
|
|
|
const struct dev_pm_ops sdhci_pltfm_pmops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
|
|
};
|
|
EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
|
|
|
|
static int __init sdhci_pltfm_drv_init(void)
|
|
{
|
|
pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
|
|
|
|
return 0;
|
|
}
|
|
module_init(sdhci_pltfm_drv_init);
|
|
|
|
static void __exit sdhci_pltfm_drv_exit(void)
|
|
{
|
|
}
|
|
module_exit(sdhci_pltfm_drv_exit);
|
|
|
|
MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
|
|
MODULE_AUTHOR("Intel Corporation");
|
|
MODULE_LICENSE("GPL v2");
|