[PATCH 4/4] ARM: S3C2416: Add platform helpers for setup SDHCI
Yauhen Kharuzhy
jekhor at gmail.com
Tue Jun 22 10:19:40 EDT 2010
On Tue, Jun 22, 2010 at 04:45:18PM +0300, Darius Augulis wrote:
> On Tue, Jun 22, 2010 at 4:16 PM, Yauhen Kharuzhy <jekhor at gmail.com> wrote:
>
> > Samsung S3C2416 has two SDHCI controllers compatible with other
> > Samsung's SoCs (S3C64XX, S5PC100 etc...).
> >
> > Add required platform setup code that the devices can be used with
> > sdhci-s3c driver.
> >
> > Signed-off-by: Yauhen Kharuzhy <jekhor at gmail.com>
> > ---
> > arch/arm/mach-s3c2416/Kconfig | 23 ++++++++++
> > arch/arm/mach-s3c2416/Makefile | 5 ++
> > arch/arm/mach-s3c2416/s3c2416.c | 5 ++
> > arch/arm/mach-s3c2416/setup-sdhci-gpio.c | 60
> > +++++++++++++++++++++++++++
> > arch/arm/mach-s3c2416/setup-sdhci.c | 62
> > ++++++++++++++++++++++++++++
> > arch/arm/plat-samsung/include/plat/sdhci.h | 34 +++++++++++++++
> > 6 files changed, 189 insertions(+), 0 deletions(-)
> > create mode 100644 arch/arm/mach-s3c2416/setup-sdhci-gpio.c
> > create mode 100644 arch/arm/mach-s3c2416/setup-sdhci.c
> >
> > diff --git a/arch/arm/mach-s3c2416/Kconfig b/arch/arm/mach-s3c2416/Kconfig
> > index eafb0ed..e055c7f 100644
> > --- a/arch/arm/mach-s3c2416/Kconfig
> > +++ b/arch/arm/mach-s3c2416/Kconfig
> > @@ -25,6 +25,17 @@ config S3C2416_DMA
> > help
> > Internal config node for S3C2416 DMA support
> >
> > +config S3C2416_SETUP_SDHCI
> > + bool
> > + select S3C2416_SETUP_SDHCI_GPIO
> > + help
> > + Internal helper functions for S3C2416 based SDHCI systems
> > +
> > +config S3C2416_SETUP_SDHCI_GPIO
> > + bool
> > + help
> > + Common setup code for SDHCI gpio.
> > +
> > menu "S3C2416 Machines"
> >
> > config MACH_SMDK2416
> > @@ -36,7 +47,19 @@ config MACH_SMDK2416
> > select S3C_DEV_HSMMC1
> > select S3C_DEV_NAND
> > select S3C_DEV_USB_HOST
> > + select S3C2416_SETUP_SDHCI
> > help
> > Say Y here if you are using an SMDK2416
> >
> > +config MACH_HANLIN_V3C
> > + bool "Hanlin eReader V3C"
> > + select CPU_S3C2416
> > + select S3C_DEV_HSMMC
> > + select S3C_DEV_HSMMC1
> > + select S3C_DEV_NAND
> > + select S3C_DEV_USB_HOST
> > + select S3C2416_SETUP_SDHCI
> > + help
> > + Say Y here if you are using an Jinke's Hanlin V3C eReader
> > +
> > endmenu
> > diff --git a/arch/arm/mach-s3c2416/Makefile
> > b/arch/arm/mach-s3c2416/Makefile
> > index 6c12c7b..678e148 100644
> > --- a/arch/arm/mach-s3c2416/Makefile
> > +++ b/arch/arm/mach-s3c2416/Makefile
> > @@ -14,6 +14,11 @@ obj-$(CONFIG_CPU_S3C2416) += irq.o
> >
> > #obj-$(CONFIG_S3C2416_DMA) += dma.o
> >
> > +# Device setup
> > +obj-$(CONFIG_S3C2416_SETUP_SDHCI) += setup-sdhci.o
> > +obj-$(CONFIG_S3C2416_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o
> > +
> > # Machine support
> >
> > obj-$(CONFIG_MACH_SMDK2416) += mach-smdk2416.o
> > +obj-$(CONFIG_MACH_HANLIN_V3C) += mach-v3c.o
> > diff --git a/arch/arm/mach-s3c2416/s3c2416.c
> > b/arch/arm/mach-s3c2416/s3c2416.c
> > index 355ab62..06eacf8 100644
> > --- a/arch/arm/mach-s3c2416/s3c2416.c
> > +++ b/arch/arm/mach-s3c2416/s3c2416.c
> > @@ -53,6 +53,7 @@
> > #include <plat/s3c2416.h>
> > #include <plat/devs.h>
> > #include <plat/cpu.h>
> > +#include <plat/sdhci.h>
> >
> > #include <plat/iic-core.h>
> >
> > @@ -115,6 +116,10 @@ void __init s3c2416_map_io(void)
> > s3c24xx_gpiocfg_default.set_pull = s3c_gpio_setpull_updown;
> > s3c24xx_gpiocfg_default.get_pull = s3c_gpio_getpull_updown;
> >
> > + /* initialize device information early */
> > + s3c2416_default_sdhci0();
> > + s3c2416_default_sdhci1();
> > +
> > iotable_init(s3c2416_iodesc, ARRAY_SIZE(s3c2416_iodesc));
> > }
> >
> > diff --git a/arch/arm/mach-s3c2416/setup-sdhci-gpio.c
> > b/arch/arm/mach-s3c2416/setup-sdhci-gpio.c
> > new file mode 100644
> > index 0000000..ebdab15
> > --- /dev/null
> > +++ b/arch/arm/mach-s3c2416/setup-sdhci-gpio.c
> > @@ -0,0 +1,60 @@
> > +/* linux/arch/arm/plat-s3c2416/setup-sdhci-gpio.c
> > + *
> > + * Copyright 2010 Promwad Innovation Company
> > + * Yauhen Kharuzhy <yauhen.kharuzhy at promwad.com>
> > + *
> > + * S3C2416 - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
> > + *
> > + * Based on mach-s3c64xx/setup-sdhci-gpio.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 <mach/gpio.h>
> > +#include <mach/regs-gpio.h>
> > +#include <plat/gpio-cfg.h>
> > +
> > +/* Note: hsmmc1 and hsmmc0 are swapped versus datasheet */
> >
>
> would be nice to provide more accurate link to information source (document
> version, page).
> And there is a bit tricky place: clock ids are swapped and names of helper
> functions are not.
> So, it's not clear which helper function corresponds to real physical SDHC
> interface.
S3C2416 User's Manual, pages 238 (10-4) and 241 (10-7): GPE5-GPE10
correspond to SD0, GPL0-GPL3, GPL8-GPL9 --- to SD1. So all platform
devices and GPIO config functions have namas swapped versus datasheet.
We have HSMMC1 and HSMMC0 swapped due to historical reasons --- there are HSMMC
block in S3C2443 and HSMMC1 block in S3C2416 on same address. I am going
to revert this swapping later.
> > +void s3c2416_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
> > +{
> > + unsigned int gpio;
> > + unsigned int end;
> > +
> > + end = S3C2410_GPE(7 + width);
> > +
> > + /* Set all the necessary GPE pins to special-function 0 */
> > + for (gpio = S3C2410_GPE(5); gpio < end; gpio++) {
> > + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
> > + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
> > + }
> > +}
> > +
> > +void s3c2416_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
> > +{
> > + unsigned int gpio;
> > + unsigned int end;
> > +
> > + end = S3C2410_GPL(0 + width);
> > +
> > + /* Set all the necessary GPG pins to special-function 0 */
> > + for (gpio = S3C2410_GPL(0); gpio < end; gpio++) {
> > + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
> > + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
> > + }
> > +
> > + s3c_gpio_cfgpin(S3C2410_GPL(8), S3C_GPIO_SFN(2));
> > + s3c_gpio_setpull(S3C2410_GPL(8), S3C_GPIO_PULL_NONE);
> > + s3c_gpio_cfgpin(S3C2410_GPL(9), S3C_GPIO_SFN(2));
> > + s3c_gpio_setpull(S3C2410_GPL(9), S3C_GPIO_PULL_NONE);
> > +}
> > +
> > +
> > diff --git a/arch/arm/mach-s3c2416/setup-sdhci.c
> > b/arch/arm/mach-s3c2416/setup-sdhci.c
> > new file mode 100644
> > index 0000000..345ddd1
> > --- /dev/null
> > +++ b/arch/arm/mach-s3c2416/setup-sdhci.c
> > @@ -0,0 +1,62 @@
> > +/* linux/arch/arm/mach-s3c2416/setup-sdhci.c
> > + *
> > + * Copyright 2010 Promwad Innovation Company
> > + * Yauhen Kharuzhy <yauhen.kharuzhy at promwad.com>
> > + *
> > + * S3C2416 - Helper functions for settign up SDHCI device(s) (HSMMC)
> > + *
> > + * Based on mach-s3c64xx/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 *s3c2416_hsmmc_clksrcs[4] = {
> > + [0] = "hsmmc",
> > + [1] = "hsmmc",
> > + [2] = "hsmmc-if",
> > + /* [3] = "48m", - note not successfully used yet */
> > +};
> > +
> > +void s3c2416_setup_sdhci_cfg_card(struct platform_device *dev,
> > + void __iomem *r,
> > + struct mmc_ios *ios,
> > + struct mmc_card *card)
> > +{
> > + u32 ctrl2, ctrl3;
> > +
> > + 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);
> > +}
> > +
> > diff --git a/arch/arm/plat-samsung/include/plat/sdhci.h
> > b/arch/arm/plat-samsung/include/plat/sdhci.h
> > index 13f9fb2..d408140 100644
> > --- a/arch/arm/plat-samsung/include/plat/sdhci.h
> > +++ b/arch/arm/plat-samsung/include/plat/sdhci.h
> > @@ -78,6 +78,8 @@ extern void s3c64xx_setup_sdhci2_cfg_gpio(struct
> > platform_device *, int w);
> > extern void s5pv210_setup_sdhci0_cfg_gpio(struct platform_device *, int
> > w);
> > extern void s5pv210_setup_sdhci1_cfg_gpio(struct platform_device *, int
> > w);
> > extern void s5pv210_setup_sdhci2_cfg_gpio(struct platform_device *, int
> > w);
> > +extern void s3c2416_setup_sdhci0_cfg_gpio(struct platform_device *, int
> > w);
> > +extern void s3c2416_setup_sdhci1_cfg_gpio(struct platform_device *, int
> > w);
> >
> > /* S3C6400 SDHCI setup */
> >
> > @@ -270,6 +272,38 @@ static inline void s5pv210_default_sdhci1(void) { }
> > static inline void s5pv210_default_sdhci2(void) { }
> > #endif /* CONFIG_S5PC100_SETUP_SDHCI */
> >
> > +/* S3C2416 SDHCI setup */
> > +#ifdef CONFIG_S3C2416_SETUP_SDHCI
> > +extern char *s3c2416_hsmmc_clksrcs[4];
> > +
> > +extern void s3c2416_setup_sdhci_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 s3c2416_default_sdhci0(void)
> > +{
> > + s3c_hsmmc0_def_platdata.clocks = s3c2416_hsmmc_clksrcs;
> > + s3c_hsmmc0_def_platdata.cfg_gpio = s3c2416_setup_sdhci0_cfg_gpio;
> > + s3c_hsmmc0_def_platdata.cfg_card = s3c2416_setup_sdhci_cfg_card;
> >
>
> helper id 0 gets to interface 0 - not swapped.
>
>
> > +}
> > +#else
> > +static inline void s3c2416_default_sdhci0(void) { }
> > +#endif /* CONFIG_S3C_DEV_HSMMC */
> > +
> > +#ifdef CONFIG_S3C_DEV_HSMMC1
> > +static inline void s3c2416_default_sdhci1(void)
> > +{
> > + s3c_hsmmc1_def_platdata.clocks = s3c2416_hsmmc_clksrcs;
> > + s3c_hsmmc1_def_platdata.cfg_gpio = s3c2416_setup_sdhci1_cfg_gpio;
> > + s3c_hsmmc1_def_platdata.cfg_card = s3c2416_setup_sdhci_cfg_card;
> >
>
> helper id 1 gets to interface 1 - not swapped.
>
>
> > +}
> > +#else
> > +static inline void s3c2416_default_sdhci1(void) { }
> > +#endif /* CONFIG_S3C_DEV_HSMMC1 */
> > +
> > +#endif /* CONFIG_S3C2416_SETUP_SDHCI */
> >
> >
> >
> > --
> > 1.6.6.1
> >
> >
--
Yauhen Kharuzhy jekhor _at_ gmail.com
JID: jek at jabber.ru
A: No
Q: Should I quote below my post?
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