mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 07:22:33 +00:00
380 lines
11 KiB
Diff
380 lines
11 KiB
Diff
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
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index d84c880..3e79f43 100644
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--- a/drivers/mmc/core/core.c
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+++ b/drivers/mmc/core/core.c
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@@ -59,10 +59,11 @@ static int mmc_schedule_delayed_work(struct delayed_work *work,
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/*
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* Internal function. Flush all scheduled work from the MMC work queue.
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*/
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-static void mmc_flush_scheduled_work(void)
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+void mmc_flush_scheduled_work(void)
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{
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flush_workqueue(workqueue);
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}
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+EXPORT_SYMBOL_GPL(mmc_flush_scheduled_work);
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/**
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* mmc_request_done - finish processing an MMC request
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--- a/include/linux/mmc/core.h
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+++ b/include/linux/mmc/core.h
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@@ -129,6 +129,8 @@ struct mmc_request {
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struct mmc_host;
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struct mmc_card;
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+extern void mmc_flush_scheduled_work(void);
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+
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extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
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extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
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extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
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diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
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index 891ef18..fa1889a 100644
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--- a/drivers/mmc/host/Kconfig
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+++ b/drivers/mmc/host/Kconfig
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@@ -55,6 +55,18 @@ config MMC_SDHCI_PCI
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If unsure, say N.
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+config MMC_SDHCI_S3C
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+ tristate "SDHCI support on Samsung S3C SoC"
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+ depends on MMC_SDHCI && PLAT_S3C24XX
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+ help
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+ This selects the Secure Digital Host Controller Interface (SDHCI)
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+ often referrered to as the HSMMC block in some of the Samsung S3C
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+ range of SoC.
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+
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+ If you have a controller with this interface, say Y or M here.
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+
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+ If unsure, say N.
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+
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config MMC_RICOH_MMC
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tristate "Ricoh MMC Controller Disabler (EXPERIMENTAL)"
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depends on MMC_SDHCI_PCI
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diff --git a/arch/arm/plat-s3c/include/plat/sdhci.h b/arch/arm/plat-s3c/include/plat/sdhci.h
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index f615308..570da2d 100644
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--- a/arch/arm/plat-s3c/include/plat/sdhci.h
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+++ b/arch/arm/plat-s3c/include/plat/sdhci.h
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@@ -29,6 +29,7 @@ struct mmc_ios;
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* is necessary the controllers and/or GPIO blocks require the
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* changing of driver-strength and other controls dependant on
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* the card and speed of operation.
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+ * sdhci_host: Pointer kept during init, allows presence change notification
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*
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* Initialisation data specific to either the machine or the platform
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* for the device driver to use or call-back when configuring gpio or
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@@ -45,8 +46,11 @@ struct s3c_sdhci_platdata {
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void __iomem *regbase,
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struct mmc_ios *ios,
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struct mmc_card *card);
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+ struct sdhci_host * sdhci_host;
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};
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+extern void sdhci_s3c_force_presence_change(struct platform_device *pdev);
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+
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/**
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* s3c_sdhci0_set_platdata - Set platform data for S3C SDHCI device.
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* @pd: Platform data to register to device.
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--- /dev/null
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+++ b/arch/arm/mach-s3c2410/include/mach/mci.h
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@@ -0,0 +1,13 @@
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+#ifndef _ARCH_MCI_H
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+#define _ARCH_MCI_H
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+
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+struct s3c24xx_mci_pdata {
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+ unsigned int gpio_detect;
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+ unsigned int gpio_wprotect;
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+ unsigned long ocr_avail;
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+ unsigned int do_dma;
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+ void (*set_power)(unsigned char power_mode,
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+ unsigned short vdd);
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+};
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+
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+#endif /* _ARCH_NCI_H */
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diff --git a/arch/arm/mach-s3c2440/s3c2440.c b/arch/arm/mach-s3c2440/s3c2440.c
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index ac1f7ea..f7f8f31 100644
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--- a/arch/arm/mach-s3c2440/s3c2440.c
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+++ b/arch/arm/mach-s3c2440/s3c2440.c
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@@ -46,6 +46,9 @@ int __init s3c2440_init(void)
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s3c_device_wdt.resource[1].start = IRQ_S3C2440_WDT;
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s3c_device_wdt.resource[1].end = IRQ_S3C2440_WDT;
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+ /* make sure SD/MMC driver can distinguish 2440 from 2410 */
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+ s3c_device_sdi.name = "s3c2440-sdi";
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+
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/* register our system device for everything else */
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return sysdev_register(&s3c2440_sysdev);
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diff --git a/arch/arm/mach-s3c2442/s3c2442.c b/arch/arm/mach-s3c2442/s3c2442.c
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index 4663bdc..9602d57 100644
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--- a/arch/arm/mach-s3c2442/s3c2442.c
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+++ b/arch/arm/mach-s3c2442/s3c2442.c
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@@ -21,6 +21,7 @@
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#include <plat/s3c2442.h>
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#include <plat/cpu.h>
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+#include <plat/devs.h>
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static struct sys_device s3c2442_sysdev = {
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.cls = &s3c2442_sysclass,
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@@ -30,5 +31,8 @@ int __init s3c2442_init(void)
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{
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printk("S3C2442: Initialising architecture\n");
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+ /* make sure SD/MMC driver can distinguish 2440 from 2410 */
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+ s3c_device_sdi.name = "s3c2440-sdi";
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+
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return sysdev_register(&s3c2442_sysdev);
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}
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diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
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index cf153f6..c25f464 100644
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--- a/drivers/mmc/host/Makefile
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+++ b/drivers/mmc/host/Makefile
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@@ -13,6 +13,7 @@ endif
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obj-$(CONFIG_MMC_MXC) += mxcmmc.o
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obj-$(CONFIG_MMC_SDHCI) += sdhci.o
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obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o
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+obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o
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obj-$(CONFIG_MMC_RICOH_MMC) += ricoh_mmc.o
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obj-$(CONFIG_MMC_SDHCI_OF) += sdhci-of.o
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obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o
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diff --git a/drivers/mmc/host/s3cmci.h b/drivers/mmc/host/s3cmci.h
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index ca1ba3d..7f80047 100644
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--- a/drivers/mmc/host/s3cmci.h
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+++ b/drivers/mmc/host/s3cmci.h
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@@ -8,6 +8,10 @@
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* published by the Free Software Foundation.
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*/
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+
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+#include <mach/regs-sdi.h>
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+#include <linux/regulator/consumer.h>
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+
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/* FIXME: DMA Resource management ?! */
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#define S3CMCI_DMA 0
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@@ -68,7 +72,16 @@ struct s3cmci_host {
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unsigned int ccnt, dcnt;
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struct tasklet_struct pio_tasklet;
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+ /*
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+ * Here's where we save the registers during suspend. Note that we skip
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+ * SDIDATA, which is at different positions on 2410 and 2440, so
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+ * there's no "+1" in the array size.
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+ */
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+ u32 saved[(S3C2410_SDIIMSK-S3C2410_SDICON)/4];
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+
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#ifdef CONFIG_CPU_FREQ
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struct notifier_block freq_transition;
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#endif
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+
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+ struct regulator *regulator;
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};
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diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
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index 8c08cd7..b3cded4 100644
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--- a/drivers/mmc/host/s3cmci.c
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+++ b/drivers/mmc/host/s3cmci.c
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@@ -2,6 +2,7 @@
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* linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver
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*
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* Copyright (C) 2004-2006 maintech GmbH, Thomas Kleffel <tk@maintech.de>
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+ * Copyright (C) 2007 Harald Welte <laforge@gnumonks.org>
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*
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* Current driver maintained by Ben Dooks and Simtec Electronics
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* Copyright (C) 2008 Simtec Electronics <ben-linux@fluff.org>
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@@ -25,9 +26,18 @@
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#include <mach/regs-sdi.h>
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#include <mach/regs-gpio.h>
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+#include <mach/hardware.h>
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#include <plat/mci.h>
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+#include <asm/dma.h>
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+#include <asm/dma-mapping.h>
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+
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+#include <asm/io.h>
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+#include <mach/regs-gpio.h>
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+#include <mach/mci.h>
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+#include <mach/dma.h>
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+
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#include "s3cmci.h"
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#define DRIVER_NAME "s3c-mci"
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@@ -48,6 +58,9 @@ static const int dbgmap_err = dbg_fail;
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static const int dbgmap_info = dbg_info | dbg_conf;
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static const int dbgmap_debug = dbg_err | dbg_debug;
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+static int f_max = -1; /* override maximum frequency limit */
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+static int persist; /* keep interface alive across suspend/resume */
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+
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#define dbg(host, channels, args...) \
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do { \
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if (dbgmap_err & channels) \
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@@ -281,8 +294,11 @@ static void do_pio_read(struct s3cmci_host *host)
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* an even multiple of 4. */
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if (fifo >= host->pio_bytes)
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fifo = host->pio_bytes;
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- else
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+ else {
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fifo -= fifo & 3;
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+ if (!fifo)
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+ break;
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+ }
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host->pio_bytes -= fifo;
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host->pio_count += fifo;
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@@ -330,7 +346,7 @@ static void do_pio_write(struct s3cmci_host *host)
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to_ptr = host->base + host->sdidata;
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- while ((fifo = fifo_free(host)) > 3) {
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+ while ((fifo = fifo_free(host))) {
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if (!host->pio_bytes) {
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res = get_data_buffer(host, &host->pio_bytes,
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&host->pio_ptr);
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@@ -354,8 +370,11 @@ static void do_pio_write(struct s3cmci_host *host)
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* words, so round down to an even multiple of 4. */
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if (fifo >= host->pio_bytes)
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fifo = host->pio_bytes;
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- else
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+ else {
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fifo -= fifo & 3;
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+ if (!fifo)
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+ break;
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+ }
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host->pio_bytes -= fifo;
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host->pio_count += fifo;
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@@ -374,7 +393,6 @@ static void pio_tasklet(unsigned long data)
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{
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struct s3cmci_host *host = (struct s3cmci_host *) data;
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-
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disable_irq(host->irq);
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if (host->pio_active == XFER_WRITE)
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@@ -615,7 +633,6 @@ irq_out:
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spin_unlock_irqrestore(&host->complete_lock, iflags);
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return IRQ_HANDLED;
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-
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}
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/*
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@@ -1027,6 +1044,7 @@ static void s3cmci_send_request(struct mmc_host *mmc)
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dbg(host, dbg_err, "data prepare error %d\n", res);
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cmd->error = res;
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cmd->data->error = res;
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+ cmd->data->error = -EIO;
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mmc_request_done(mmc, mrq);
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return;
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@@ -1264,10 +1282,8 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
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host->is2440 = is2440;
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host->pdata = pdev->dev.platform_data;
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- if (!host->pdata) {
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- pdev->dev.platform_data = &s3cmci_def_pdata;
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+ if (!host->pdata)
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host->pdata = &s3cmci_def_pdata;
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- }
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spin_lock_init(&host->complete_lock);
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tasklet_init(&host->pio_tasklet, pio_tasklet, (unsigned long) host);
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@@ -1380,6 +1396,18 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
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mmc->f_min = host->clk_rate / (host->clk_div * 256);
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mmc->f_max = host->clk_rate / host->clk_div;
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+ if (f_max >= 0) {
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+ unsigned f = f_max;
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+
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+ if (f < mmc->f_min)
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+ f = mmc->f_min;
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+ if (mmc->f_max > f) {
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+ dev_info(&pdev->dev, "f_max lowered from %u to %u Hz\n",
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+ mmc->f_max, f);
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+ mmc->f_max = f;
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+ }
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+ }
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+
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if (host->pdata->ocr_avail)
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mmc->ocr_avail = host->pdata->ocr_avail;
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@@ -1492,18 +1520,60 @@ static int __devinit s3cmci_2440_probe(struct platform_device *dev)
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#ifdef CONFIG_PM
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+static int save_regs(struct mmc_host *mmc)
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+{
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+ struct s3cmci_host *host = mmc_priv(mmc);
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+ unsigned long flags;
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+ unsigned from;
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+ u32 *to = host->saved;
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+
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+ mmc_flush_scheduled_work();
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+
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+ local_irq_save(flags);
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+ for (from = S3C2410_SDICON; from != S3C2410_SDIIMSK+4; from += 4)
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+ if (from != host->sdidata)
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+ *to++ = readl(host->base + from);
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+ BUG_ON(to-host->saved != ARRAY_SIZE(host->saved));
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+ local_irq_restore(flags);
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+
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+ return 0;
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+}
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+
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+static int restore_regs(struct mmc_host *mmc)
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+{
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+ struct s3cmci_host *host = mmc_priv(mmc);
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+ unsigned long flags;
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+ unsigned to;
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+ u32 *from = host->saved;
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+
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+ /*
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+ * Before we begin with the necromancy, make sure we don't
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+ * inadvertently start something we'll regret microseconds later.
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+ */
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+ from[S3C2410_SDICMDCON - S3C2410_SDICON] = 0;
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+
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+ local_irq_save(flags);
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+ for (to = S3C2410_SDICON; to != S3C2410_SDIIMSK+4; to += 4)
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+ if (to != host->sdidata)
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+ writel(*from++, host->base + to);
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+ BUG_ON(from-host->saved != ARRAY_SIZE(host->saved));
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+ local_irq_restore(flags);
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+
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+ return 0;
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+}
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+
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static int s3cmci_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct mmc_host *mmc = platform_get_drvdata(dev);
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- return mmc_suspend_host(mmc, state);
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+ return persist ? save_regs(mmc) : mmc_suspend_host(mmc, state);
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}
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static int s3cmci_resume(struct platform_device *dev)
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{
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struct mmc_host *mmc = platform_get_drvdata(dev);
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- return mmc_resume_host(mmc);
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+ return persist ? restore_regs(mmc) : mmc_resume_host(mmc);
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}
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#else /* CONFIG_PM */
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@@ -1561,9 +1631,13 @@ static void __exit s3cmci_exit(void)
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module_init(s3cmci_init);
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module_exit(s3cmci_exit);
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+module_param(f_max, int, 0644);
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+module_param(persist, int, 0644);
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+
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MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Thomas Kleffel <tk@maintech.de>, Ben Dooks <ben-linux@fluff.org>");
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MODULE_ALIAS("platform:s3c2410-sdi");
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MODULE_ALIAS("platform:s3c2412-sdi");
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MODULE_ALIAS("platform:s3c2440-sdi");
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+
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