Commit 5cc7fd88 authored by Ben Dooks's avatar Ben Dooks
Browse files

[ARM] S3C6410: Add helper for setting SDHCI device information 



Add the necessary helper functions for setting up the SDHCI
device information.

Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent ea522c7a

arch/arm/mach-s3c6410/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -14,9 +14,15 @@ config CPU_S3C6410 
	help

	  Enable S3C6410 CPU support



config S3C6410_SETUP_SDHCI

	bool

	help

	  Internal helper functions for S3C6410 based SDHCI systems



config MACH_SMDK6410

	bool "SMDK6410"

	select CPU_S3C6410

	select S3C_DEV_HSMMC

	select S3C6410_SETUP_SDHCI

	help

	  Machine support for the Samsung SMDK6410

arch/arm/mach-s3c6410/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -14,6 +14,10 @@ obj- := 


obj-$(CONFIG_CPU_S3C6410)	+= cpu.o



# Helper and device support



obj-$(CONFIG_S3C6410_SETUP_SDHCI)	+= setup-sdhci.o



# machine support



obj-$(CONFIG_MACH_SMDK6410)	+= mach-smdk6410.o

arch/arm/mach-s3c6410/cpu.c

+4 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ 
#include <plat/cpu.h>

#include <plat/devs.h>

#include <plat/clock.h>

#include <plat/sdhci.h>

#include <plat/s3c6400.h>

#include <plat/s3c6410.h>
@@ -51,6 +52,9 @@ static struct map_desc s3c6410_iodesc[] __initdata = { 
void __init s3c6410_map_io(void)

{

	iotable_init(s3c6410_iodesc, ARRAY_SIZE(s3c6410_iodesc));



	/* initialise device information early */

	s3c6410_default_sdhci0();

}



void __init s3c6410_init_clocks(int xtal)

arch/arm/mach-s3c6410/setup-sdhci.c

0 → 100644
+102 −0
Original line number Diff line number Diff line 
/* linux/arch/arm/mach-s3c6410/setup-sdhci.c

 *

 * Copyright 2008 Simtec Electronics

 * Copyright 2008 Simtec Electronics

 *	Ben Dooks <ben@simtec.co.uk>

 *	http://armlinux.simtec.co.uk/

 *

 * S3C6410 - Helper functions for settign up SDHCI device(s) (HSMMC)

 *

 * 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.

*/



#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>

#include <linux/io.h>



#include <linux/mmc/card.h>

#include <linux/mmc/host.h>



#include <mach/gpio.h>

#include <plat/gpio-cfg.h>

#include <plat/regs-sdhci.h>

#include <plat/sdhci.h>



/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */



char *s3c6410_hsmmc_clksrcs[4] = {

	[0] = "hsmmc",

	[1] = "hsmmc",

	[2] = "mmc_bus",

	/* [3] = "48m", - note not succesfully used yet */

};



void s3c6410_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)

{

	unsigned int gpio;

	unsigned int end;



	end = S3C64XX_GPG(2 + width);



	/* Set all the necessary GPG pins to special-function 0 */

	for (gpio = S3C64XX_GPG(0); gpio < end; gpio++) {

		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));

		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);

	}



	s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);

	s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2));

}



void s3c6410_setup_sdhci0_cfg_card(struct platform_device *dev,

				    void __iomem *r,

				    struct mmc_ios *ios,

				    struct mmc_card *card)

{

	u32 ctrl2, ctrl3;



	/* don't need to alter anything acording to card-type */



	writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);



	ctrl2 = readl(r + S3C_SDHCI_CONTROL2);

	ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;

	ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |

		  S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |

		  S3C_SDHCI_CTRL2_ENFBCLKRX |

		  S3C_SDHCI_CTRL2_DFCNT_NONE |

		  S3C_SDHCI_CTRL2_ENCLKOUTHOLD);



	if (ios->clock < 25 * 1000000)

		ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |

			 S3C_SDHCI_CTRL3_FCSEL2 |

			 S3C_SDHCI_CTRL3_FCSEL1 |

			 S3C_SDHCI_CTRL3_FCSEL0);

	else

		ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);



	printk(KERN_INFO "%s: CTRL 2=%08x, 3=%08x\n", __func__, ctrl2, ctrl3);

	writel(ctrl2, r + S3C_SDHCI_CONTROL2);

	writel(ctrl3, r + S3C_SDHCI_CONTROL3);

}



void s3c6410_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)

{

	unsigned int gpio;

	unsigned int end;



	end = S3C64XX_GPH(2 + width);



	/* Set all the necessary GPG pins to special-function 0 */

	for (gpio = S3C64XX_GPH(0); gpio < end; gpio++) {

		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));

		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);

	}



	s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);

	s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3));

}

arch/arm/plat-s3c/dev-hsmmc.c

+29 −8
Original line number Diff line number Diff line
@@ -13,8 +13,10 @@ 


#include <linux/kernel.h>

#include <linux/platform_device.h>

#include <linux/mmc/host.h>



#include <mach/map.h>

#include <plat/sdhci.h>

#include <plat/devs.h>

#include <plat/cpu.h>
@@ -35,6 +37,12 @@ static struct resource s3c_hsmmc_resource[] = { 


static u64 s3c_device_hsmmc_dmamask = 0xffffffffUL;



struct s3c_sdhci_platdata s3c_hsmmc0_def_platdata = {

	.max_width	= 4,

	.host_caps	= (MMC_CAP_4_BIT_DATA |

			   MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED),

};



struct platform_device s3c_device_hsmmc0 = {

	.name		= "s3c-sdhci",

	.id		= 0,
@@ -42,6 +50,19 @@ struct platform_device s3c_device_hsmmc0 = { 
	.resource	= s3c_hsmmc_resource,

	.dev		= {

		.dma_mask		= &s3c_device_hsmmc_dmamask,

		.coherent_dma_mask = 0xffffffffUL

	}

		.coherent_dma_mask	= 0xffffffffUL,

		.platform_data		= &s3c_hsmmc0_def_platdata,

	},

};



void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd)

{

	struct s3c_sdhci_platdata *set = &s3c_hsmmc0_def_platdata;



	set->max_width = pd->max_width;



	if (pd->cfg_gpio)

		set->cfg_gpio = pd->cfg_gpio;

	if (pd->cfg_card)

		set->cfg_card = pd->cfg_card;

}