OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ARM: S5PC1xx: add platform helpers for SDHCI host controllers 

Samsung S5PC100 has 3 SDHCI controllers compatible with the one known from
previous SoCs series. Add required platform setup and support code that
the devices can be used with sdhci-s3c driver.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Kyungmin Park 2009-11-17 08:41:23 +01:00 committed by Ben Dooks
parent 067f131d09
commit 86cd4f5f83
11 changed files with 297 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/mach-s5pc100/Kconfig
View File

@ -14,6 +14,12 @@ config CPU_S5PC100
help
Enable S5PC100 CPU support
config S5PC100_SETUP_SDHCI
bool
select S5PC1XX_SETUP_SDHCI_GPIO
help
Internal helper functions for S5PC100 based SDHCI systems
config MACH_SMDKC100
bool "SMDKC100"
select CPU_S5PC100

4
arch/arm/mach-s5pc100/Makefile
View File

@ -13,5 +13,9 @@ obj- :=
obj-$(CONFIG_CPU_S5PC100) += cpu.o
# Helper and device support
obj-$(CONFIG_S5PC100_SETUP_SDHCI) += setup-sdhci.o
# machine support
obj-$(CONFIG_MACH_SMDKC100) += mach-smdkc100.o

3
arch/arm/mach-s5pc100/cpu.c
View File

@ -75,6 +75,9 @@ void __init s5pc100_map_io(void)
iotable_init(s5pc100_iodesc, ARRAY_SIZE(s5pc100_iodesc));
/* initialise device information early */
s5pc100_default_sdhci0();
s5pc100_default_sdhci1();
s5pc100_default_sdhci2();
/* the i2c devices are directly compatible with s3c2440 */
s3c_i2c0_setname("s3c2440-i2c");

65
arch/arm/mach-s5pc100/setup-sdhci.c Normal file
View File

@ -0,0 +1,65 @@
/* linux/arch/arm/mach-s5pc100/setup-sdhci.c
*
* Copyright 2008 Samsung Electronics
*
* S5PC100 - Helper functions for settign up SDHCI device(s) (HSMMC)
*
* Based on mach-s3c6410/setup-sdhci.c
*
* 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 <plat/regs-sdhci.h>
#include <plat/sdhci.h>
/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
char *s5pc100_hsmmc_clksrcs[4] = {
[0] = "hsmmc",
[1] = "hsmmc",
/* [2] = "mmc_bus", not yet succesfuuly used yet */
/* [3] = "48m", - note not succesfully used yet */
};
void s5pc100_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);
writel(ctrl2, r + S3C_SDHCI_CONTROL2);
writel(ctrl3, r + S3C_SDHCI_CONTROL3);
}

5
arch/arm/plat-s3c/Kconfig
View File

@ -184,6 +184,11 @@ config S3C_DEV_HSMMC1
help
Compile in platform device definitions for HSMMC channel 1
config S3C_DEV_HSMMC2
bool
help
Compile in platform device definitions for HSMMC channel 2
config S3C_DEV_I2C1
bool
help

1
arch/arm/plat-s3c/Makefile
View File

@ -36,6 +36,7 @@ obj-$(CONFIG_HAVE_PWM) += pwm.o
obj-$(CONFIG_S3C_DEV_HSMMC) += dev-hsmmc.o
obj-$(CONFIG_S3C_DEV_HSMMC1) += dev-hsmmc1.o
obj-$(CONFIG_S3C_DEV_HSMMC2) += dev-hsmmc2.o
obj-y += dev-i2c0.o
obj-$(CONFIG_S3C_DEV_I2C1) += dev-i2c1.o
obj-$(CONFIG_S3C_DEV_FB) += dev-fb.o

65
arch/arm/plat-s3c/dev-hsmmc2.c Normal file
View File

@ -0,0 +1,65 @@
/* linux/arch/arm/plat-s3c/dev-hsmmc2.c
*
* Copyright (c) 2009 Samsung Electronics
*
* S3C series device definition for hsmmc device 2
*
* 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/platform_device.h>
#include <linux/mmc/host.h>
#include <mach/map.h>
#include <plat/sdhci.h>
#include <plat/devs.h>
#define S3C_SZ_HSMMC (0x1000)
static struct resource s3c_hsmmc2_resource[] = {
[0] = {
.start = S3C_PA_HSMMC2,
.end = S3C_PA_HSMMC2 + S3C_SZ_HSMMC - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_HSMMC2,
.end = IRQ_HSMMC2,
.flags = IORESOURCE_IRQ,
}
};
static u64 s3c_device_hsmmc2_dmamask = 0xffffffffUL;
struct s3c_sdhci_platdata s3c_hsmmc2_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_hsmmc2 = {
.name = "s3c-sdhci",
.id = 2,
.num_resources = ARRAY_SIZE(s3c_hsmmc2_resource),
.resource = s3c_hsmmc2_resource,
.dev = {
.dma_mask = &s3c_device_hsmmc2_dmamask,
.coherent_dma_mask = 0xffffffffUL,
.platform_data = &s3c_hsmmc2_def_platdata,
},
};
void s3c_sdhci2_set_platdata(struct s3c_sdhci_platdata *pd)
{
struct s3c_sdhci_platdata *set = &s3c_hsmmc2_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;
}

55
arch/arm/plat-s3c/include/plat/sdhci.h
View File

@ -57,6 +57,7 @@ struct s3c_sdhci_platdata {
*/
extern void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd);
extern void s3c_sdhci1_set_platdata(struct s3c_sdhci_platdata *pd);
extern void s3c_sdhci2_set_platdata(struct s3c_sdhci_platdata *pd);
/* Default platform data, exported so that per-cpu initialisation can
* set the correct one when there are more than one cpu type selected.
@ -64,11 +65,15 @@ extern void s3c_sdhci1_set_platdata(struct s3c_sdhci_platdata *pd);
extern struct s3c_sdhci_platdata s3c_hsmmc0_def_platdata;
extern struct s3c_sdhci_platdata s3c_hsmmc1_def_platdata;
extern struct s3c_sdhci_platdata s3c_hsmmc2_def_platdata;
/* Helper function availablity */
extern void s3c64xx_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
extern void s3c64xx_setup_sdhci1_cfg_gpio(struct platform_device *, int w);
extern void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
extern void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *, int w);
extern void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *, int w);
/* S3C6400 SDHCI setup */
@ -145,4 +150,54 @@ static inline void s3c6410_default_sdhci0(void) { }
static inline void s3c6410_default_sdhci1(void) { }
#endif /* CONFIG_S3C6410_SETUP_SDHCI */
/* S5PC100 SDHCI setup */
#ifdef CONFIG_S5PC100_SETUP_SDHCI
extern char *s5pc100_hsmmc_clksrcs[4];
extern void s5pc100_setup_sdhci0_cfg_card(struct platform_device *dev,
void __iomem *r,
struct mmc_ios *ios,
struct mmc_card *card);
#ifdef CONFIG_S3C_DEV_HSMMC
static inline void s5pc100_default_sdhci0(void)
{
s3c_hsmmc0_def_platdata.clocks = s5pc100_hsmmc_clksrcs;
s3c_hsmmc0_def_platdata.cfg_gpio = s5pc100_setup_sdhci0_cfg_gpio;
s3c_hsmmc0_def_platdata.cfg_card = s5pc100_setup_sdhci0_cfg_card;
}
#else
static inline void s5pc100_default_sdhci0(void) { }
#endif /* CONFIG_S3C_DEV_HSMMC */
#ifdef CONFIG_S3C_DEV_HSMMC1
static inline void s5pc100_default_sdhci1(void)
{
s3c_hsmmc1_def_platdata.clocks = s5pc100_hsmmc_clksrcs;
s3c_hsmmc1_def_platdata.cfg_gpio = s5pc100_setup_sdhci1_cfg_gpio;
s3c_hsmmc1_def_platdata.cfg_card = s5pc100_setup_sdhci0_cfg_card;
}
#else
static inline void s5pc100_default_sdhci1(void) { }
#endif /* CONFIG_S3C_DEV_HSMMC1 */
#ifdef CONFIG_S3C_DEV_HSMMC2
static inline void s5pc100_default_sdhci2(void)
{
s3c_hsmmc2_def_platdata.clocks = s5pc100_hsmmc_clksrcs;
s3c_hsmmc2_def_platdata.cfg_gpio = s5pc100_setup_sdhci2_cfg_gpio;
s3c_hsmmc2_def_platdata.cfg_card = s5pc100_setup_sdhci0_cfg_card;
}
#else
static inline void s5pc100_default_sdhci2(void) { }
#endif /* CONFIG_S3C_DEV_HSMMC1 */
#else
static inline void s5pc100_default_sdhci0(void) { }
static inline void s5pc100_default_sdhci1(void) { }
static inline void s5pc100_default_sdhci2(void) { }
#endif /* CONFIG_S5PC100_SETUP_SDHCI */
#endif /* __PLAT_S3C_SDHCI_H */

6
arch/arm/plat-s5pc1xx/Kconfig
View File

@ -55,4 +55,10 @@ config S5PC1XX_SETUP_I2C1
bool
help
Common setup code for i2c bus 1.
config S5PC1XX_SETUP_SDHCI_GPIO
bool
help
Common setup code for SDHCI gpio.
endif

1
arch/arm/plat-s5pc1xx/Makefile
View File

@ -28,3 +28,4 @@ obj-$(CONFIG_S5P_GPIO_CFG_S5PC1XX) += gpio-config.o
obj-$(CONFIG_S5PC1XX_SETUP_FB_24BPP) += setup-fb-24bpp.o
obj-$(CONFIG_S5PC1XX_SETUP_I2C0) += setup-i2c0.o
obj-$(CONFIG_S5PC1XX_SETUP_I2C1) += setup-i2c1.o
obj-$(CONFIG_S5PC1XX_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o

86
arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c Normal file
View File

@ -0,0 +1,86 @@
/* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
*
* Copyright 2009 Samsung Eletronics
*
* S5PC1XX - Helper functions for setting up SDHCI device(s) GPIO (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/gpio.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
#include <plat/gpio-cfg.h>
#include <plat/regs-sdhci.h>
void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
{
unsigned int gpio;
unsigned int end;
unsigned int num;
num = width;
/* In case of 8 width, we should decrease the 2 */
if (width == 8)
num = width - 2;
end = S5PC100_GPG0(2 + num);
/* Set all the necessary GPG0/GPG1 pins to special-function 0 */
for (gpio = S5PC100_GPG0(0); gpio < end; gpio++) {
s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
}
if (width == 8) {
for (gpio = S5PC100_GPG1(0); gpio <= S5PC100_GPG1(1); gpio++) {
s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
}
}
s3c_gpio_setpull(S5PC100_GPG1(2), S3C_GPIO_PULL_UP);
s3c_gpio_cfgpin(S5PC100_GPG1(2), S3C_GPIO_SFN(2));
}
void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
{
unsigned int gpio;
unsigned int end;
end = S5PC100_GPG2(2 + width);
/* Set all the necessary GPG2 pins to special-function 2 */
for (gpio = S5PC100_GPG2(0); gpio < end; gpio++) {
s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
}
s3c_gpio_setpull(S5PC100_GPG2(6), S3C_GPIO_PULL_UP);
s3c_gpio_cfgpin(S5PC100_GPG2(6), S3C_GPIO_SFN(2));
}
void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
{
unsigned int gpio;
unsigned int end;
end = S5PC100_GPG3(2 + width);
/* Set all the necessary GPG3 pins to special-function 2 */
for (gpio = S5PC100_GPG3(0); gpio < end; gpio++) {
s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
}
s3c_gpio_setpull(S5PC100_GPG3(6), S3C_GPIO_PULL_UP);
s3c_gpio_cfgpin(S5PC100_GPG3(6), S3C_GPIO_SFN(2));
}