Dne Pá 22. října 2010 16:09:03 zhangfei gao napsal(a):
> On Fri, Oct 22, 2010 at 7:04 AM, Chris Ball <c...@laptop.org> wrote:
> > Hi,
> >
> > On Fri, Oct 22, 2010 at 10:58:14AM +0100, Chris Ball wrote:
> > [...]
> >
> >> +#ifdef CONFIG_PM
> >> +static int sdhci_pxa_suspend(struct platform_device *dev)
> >> +{
> >> + struct sdhci_host *host =
> >> platform_get_drvdata(to_platform_device(dev)); +
> >> + return sdhci_suspend_host(host, state);
> >> +}
> >> +
> >> +static int sdhci_pxa_resume(struct platform_device *dev)
> >> +{
> >
> > These prototypes are not correct, leading to:
> >
> > CC [M] drivers/mmc/host/sdhci-pxa.o
> > drivers/mmc/host/sdhci-pxa.c: In function ‘sdhci_pxa_suspend’:
> > drivers/mmc/host/sdhci-pxa.c:205: warning: initialization from
> > incompatible pointer type drivers/mmc/host/sdhci-pxa.c:207: error:
> > ‘state’ undeclared (first use in this function)
> > drivers/mmc/host/sdhci-pxa.c:207: error: (Each undeclared identifier is
> > reported only once drivers/mmc/host/sdhci-pxa.c:207: error: for each
> > function it appears in.) drivers/mmc/host/sdhci-pxa.c: In function
> > ‘sdhci_pxa_resume’:
> > drivers/mmc/host/sdhci-pxa.c:212: warning: initialization from
> > incompatible pointer type drivers/mmc/host/sdhci-pxa.c: At top level:
> > drivers/mmc/host/sdhci-pxa.c:222: warning: initialization from
> > incompatible pointer type drivers/mmc/host/sdhci-pxa.c:223: warning:
> > initialization from incompatible pointer type
> >
> > when compiled with CONFIG_PM=y.
> >
> > --
> > Chris Ball <c...@laptop.org> <http://printf.net/>
> > One Laptop Per Child
>
> Sorry, forgot open CONFIG_PM.
> Updated patch, thanks
>
> From 88e7f028433fe87b211bf3d75b54261979d0d176 Mon Sep 17 00:00:00 2001
> From: Zhangfei Gao <zhangfei....@marvell.com>
> Date: Mon, 20 Sep 2010 10:51:28 -0400
> Subject: [PATCH] mmc: add support of sdhci-pxa driver
>
> Support Marvell PXA168/PXA910/MMP2 SD Host Controller
>
> Signed-off-by: Zhangfei Gao <zhangfei....@marvell.com>
> Acked-by: Haojian Zhuang <haojian.zhu...@marvell.com>
> ---
> arch/arm/plat-pxa/include/plat/sdhci.h | 32 ++++
> drivers/mmc/host/Kconfig | 12 ++
> drivers/mmc/host/Makefile | 1 +
> drivers/mmc/host/sdhci-pxa.c | 254
> ++++++++++++++++++++++++++++++++ 4 files changed, 299 insertions(+), 0
> deletions(-)
> create mode 100644 arch/arm/plat-pxa/include/plat/sdhci.h
> create mode 100644 drivers/mmc/host/sdhci-pxa.c
>
> diff --git a/arch/arm/plat-pxa/include/plat/sdhci.h
> b/arch/arm/plat-pxa/include/plat/sdhci.h
> new file mode 100644
> index 0000000..38e86ad
> --- /dev/null
> +++ b/arch/arm/plat-pxa/include/plat/sdhci.h
> @@ -0,0 +1,32 @@
> +/* linux/arch/arm/plat-pxa/include/plat/sdhci.h
> + *
> + * Copyright 2010 Marvell
> + * Zhangfei Gao <zhangfei....@marvell.com>
> + *
> + * PXA Platform - SDHCI platform data definitions
> + *
> + * 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.
> +*/
> +
> +#ifndef __PLAT_PXA_SDHCI_H
> +#define __PLAT_PXA_SDHCI_H
> +
> +/* pxa specific flag */
> +/* Require clock free running */
> +#define PXA_FLAG_DISABLE_CLOCK_GATING (1<<0)
> +
> +/**
> + * struct pxa_sdhci_platdata() - Platform device data for PXA SDHCI
> + * @max_speed: The maximum speed supported.
> + * @quirks: quirks of specific device
> + * @flags: flags for platfrom requirement
> +*/
> +struct sdhci_pxa_platdata {
> + unsigned int max_speed;
> + unsigned int quirks;
> + unsigned int flags;
> +};
> +
> +#endif /* __PLAT_PXA_SDHCI_H */
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index c9c2520..c387402 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -155,6 +155,18 @@ config MMC_SDHCI_S3C
>
> If unsure, say N.
>
> +config MMC_SDHCI_PXA
> + tristate "Marvell PXA168/PXA910/MMP2 SD Host Controller support"
> + depends on ARCH_PXA || ARCH_MMP
> + select MMC_SDHCI
> + select MMC_SDHCI_IO_ACCESSORS
> + help
> + This selects the Marvell(R) PXA168/PXA910/MMP2 SD Host Controller.
> + If you have a PXA168/PXA910/MMP2 platform with SD Host Controller and
> a
> + card slot,say Y or M here.
> +
> + If unsure, say N.
> +
> config MMC_SDHCI_SPEAR
> tristate "SDHCI support on ST SPEAr platform"
> depends on MMC_SDHCI && PLAT_SPEAR
> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> index 6c4ac67..7b645ff 100644
> --- a/drivers/mmc/host/Makefile
> +++ b/drivers/mmc/host/Makefile
> @@ -8,6 +8,7 @@ obj-$(CONFIG_MMC_IMX) += imxmmc.o
> obj-$(CONFIG_MMC_MXC) += mxcmmc.o
> obj-$(CONFIG_MMC_SDHCI) += sdhci.o
> obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o
> +obj-$(CONFIG_MMC_SDHCI_PXA) += sdhci-pxa.o
> obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o
> obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o
> obj-$(CONFIG_MMC_WBSD) += wbsd.o
> diff --git a/drivers/mmc/host/sdhci-pxa.c b/drivers/mmc/host/sdhci-pxa.c
> new file mode 100644
> index 0000000..abf208c
> --- /dev/null
> +++ b/drivers/mmc/host/sdhci-pxa.c
> @@ -0,0 +1,254 @@
> +/* linux/drivers/mmc/host/sdhci-pxa.c
> + *
> + * Copyright (C) 2010 Marvell International Ltd.
> + * Zhangfei Gao <zhangfei....@marvell.com>
> + * Kevin Wang <dwa...@marvell.com>
> + * Mingwei Wang <mww...@marvell.com>
> + * Philip Rakity <prak...@marvell.com>
> + * Mark Brown <ma...@marvell.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.
> + */
> +
> +/* Supports:
> + * SDHCI support for MMP2/PXA910/PXA168
> + *
> + * Refer sdhci-s3c.c
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/platform_device.h>
> +#include <linux/mmc/host.h>
> +#include <linux/clk.h>
> +#include <linux/io.h>
> +#include <linux/err.h>
> +#include <plat/sdhci.h>
> +#include "sdhci.h"
> +
> +#define DRIVER_NAME "sdhci-pxa"
> +
> +#define SD_FIFO_PARAM 0x104
> +#define DIS_PAD_SD_CLK_GATE 0x400
> +
> +struct sdhci_pxa {
> + struct sdhci_host *host;
> + struct sdhci_pxa_platdata *pdata;
> + struct clk *clk;
> + struct resource *res;
> +
> + u8 clk_enable;
> +};
> +
> +/*************************************************************************
> ****\ + *
> * + * SDHCI core callbacks
> * + *
> *
> +\************************************************************************
> *****/ +static void set_clock(struct sdhci_host *host, unsigned int clock)
> +{
> + struct sdhci_pxa *pxa = sdhci_priv(host);
> + u32 tmp = 0;
> +
> + if (clock == 0) {
> + if (pxa->clk_enable) {
> + clk_disable(pxa->clk);
> + pxa->clk_enable = 0;
> + }
> + } else {
> + if (0 == pxa->clk_enable) {
> + if (pxa->pdata->flags
> + & PXA_FLAG_DISABLE_CLOCK_GATING) {
> + tmp = readl(host->ioaddr + SD_FIFO_PARAM);
> + tmp |= DIS_PAD_SD_CLK_GATE;
> + writel(tmp, host->ioaddr + SD_FIFO_PARAM);
> + }
> + clk_enable(pxa->clk);
> + pxa->clk_enable = 1;
> + }
> + }
> +}
Doesn't the clock framework have something like clk_is_already_enabled()
function ?
> +
> +static struct sdhci_ops sdhci_pxa_ops = {
> + .set_clock = set_clock,
> +};
> +
> +/*************************************************************************
> ****\ + *
> * + * Device probing/removal
> * + *
> *
> +\************************************************************************
> *****/ +
> +static int __devinit sdhci_pxa_probe(struct platform_device *pdev)
> +{
> + struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data;
> + struct device *dev = &pdev->dev;
> + struct sdhci_host *host = NULL;
> + struct resource *iomem = NULL;
> + struct sdhci_pxa *pxa = NULL;
> + int ret, irq;
> +
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0) {
> + dev_err(dev, "no irq specified\n");
> + return irq;
> + }
> +
> + iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!iomem) {
> + dev_err(dev, "no memory specified\n");
> + return -ENOENT;
> + }
> +
> + host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdhci_pxa));
> + if (IS_ERR(host)) {
> + dev_err(dev, "failed to alloc host\n");
> + return PTR_ERR(host);
> + }
> +
> + pxa = sdhci_priv(host);
> + pxa->host = host;
> + pxa->pdata = pdata;
> + pxa->clk_enable = 0;
> +
> + pxa->clk = clk_get(dev, "PXA-SDHCLK");
> + if (IS_ERR(pxa->clk)) {
> + dev_err(dev, "failed to get io clock\n");
> + ret = PTR_ERR(pxa->clk);
> + goto out;
> + }
> +
> + pxa->res = request_mem_region(iomem->start, resource_size(iomem),
> + mmc_hostname(host->mmc));
> + if (!pxa->res) {
> + dev_err(&pdev->dev, "cannot request region\n");
> + ret = -EBUSY;
> + goto out;
> + }
> +
> + host->ioaddr = ioremap(iomem->start, resource_size(iomem));
> + if (!host->ioaddr) {
> + dev_err(&pdev->dev, "failed to remap registers\n");
> + ret = -ENOMEM;
> + goto out;
> + }
> +
> + host->hw_name = "MMC";
> + host->ops = &sdhci_pxa_ops;
> + host->irq = irq;
> + host->quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
> +
Maybe check if these aren't already set in pdata and warn user ?
> + if (pdata->quirks)
> + host->quirks |= pdata->quirks;
> +
> + ret = sdhci_add_host(host);
> + if (ret) {
> + dev_err(&pdev->dev, "failed to add host\n");
> + goto out;
> + }
> +
> + if (pxa->pdata->max_speed)
> + host->mmc->f_max = pxa->pdata->max_speed;
What happens otherwise ?
> +
> + platform_set_drvdata(pdev, host);
> +
> + return 0;
> +out:
> + if (host) {
> + clk_put(pxa->clk);
> + if (host->ioaddr)
> + iounmap(host->ioaddr);
> + if (pxa->res)
> + release_mem_region(pxa->res->start,
> + resource_size(pxa->res));
> + sdhci_free_host(host);
> + }
> +
> + return ret;
> +}
> +
> +static int __devexit sdhci_pxa_remove(struct platform_device *pdev)
> +{
> + struct sdhci_host *host = platform_get_drvdata(pdev);
> + struct sdhci_pxa *pxa = sdhci_priv(host);
> + int dead = 0;
> + u32 scratch;
> +
> + if (host) {
> + scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
> + if (scratch == (u32)-1)
> + dead = 1;
> +
> + sdhci_remove_host(host, dead);
> +
> + if (host->ioaddr)
> + iounmap(host->ioaddr);
> + if (pxa->res)
> + release_mem_region(pxa->res->start,
> + resource_size(pxa->res));
> + if (pxa->clk_enable) {
> + clk_disable(pxa->clk);
> + pxa->clk_enable = 0;
> + }
> + clk_put(pxa->clk);
> +
> + sdhci_free_host(host);
> + platform_set_drvdata(pdev, NULL);
> + }
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM
> +static int sdhci_pxa_suspend(struct platform_device *dev, pm_message_t
> state) +{
> + struct sdhci_host *host = platform_get_drvdata(dev);
> +
> + return sdhci_suspend_host(host, state);
> +}
> +
> +static int sdhci_pxa_resume(struct platform_device *dev)
> +{
> + struct sdhci_host *host = platform_get_drvdata(dev);
> +
> + return sdhci_resume_host(host);
> +}
> +#else
> +#define sdhci_pxa_suspend NULL
> +#define sdhci_pxa_resume NULL
> +#endif
> +
> +static struct platform_driver sdhci_pxa_driver = {
> + .probe = sdhci_pxa_probe,
> + .remove = __devexit_p(sdhci_pxa_remove),
> + .suspend = sdhci_pxa_suspend,
> + .resume = sdhci_pxa_resume,
> + .driver = {
> + .name = DRIVER_NAME,
> + .owner = THIS_MODULE,
> + },
> +};
> +
> +/*************************************************************************
> ****\ + *
> * + * Driver init/exit
> * + *
> *
> +\************************************************************************
> *****/ +
> +static int __init sdhci_pxa_init(void)
> +{
> + return platform_driver_register(&sdhci_pxa_driver);
> +}
> +
> +static void __exit sdhci_pxa_exit(void)
> +{
> + platform_driver_unregister(&sdhci_pxa_driver);
> +}
> +
> +module_init(sdhci_pxa_init);
> +module_exit(sdhci_pxa_exit);
> +
> +MODULE_DESCRIPTION("SDH controller driver for PXA168/PXA910/MMP2");
> +MODULE_AUTHOR("Zhangfei Gao <zhangfei....@marvell.com>");
> +MODULE_LICENSE("GPL v2");
Thanks!
Cheers
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