[PATCH v2] ARM: EXYNOS4: Add platform device for dwmci driver.

Thu Jul 14 22:31:49 EDT 2011

On Thu, Jul 14, 2011 at 6:53 PM, Seungwon Jeon <tgih.jun at samsung.com> wrote:
> This patch add platform devices for Synopsys DesignWare Multimedia Card
> Interface driver.
>
> Signed-off-by: Seungwon Jeon <tgih.jun at samsung.com>
> ---
>  arch/arm/mach-exynos4/Kconfig             |   12 ++++
>  arch/arm/mach-exynos4/Makefile            |    1 +
>  arch/arm/mach-exynos4/dev-dwmci.c         |   88 +++++++++++++++++++++++++++++
>  arch/arm/mach-exynos4/include/mach/irqs.h |    1 +
>  arch/arm/mach-exynos4/include/mach/map.h  |    1 +
>  arch/arm/plat-samsung/include/plat/devs.h |    1 +
>  6 files changed, 104 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/mach-exynos4/dev-dwmci.c
>
> diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig
> index 5115b90..2ec5b96 100644
> --- a/arch/arm/mach-exynos4/Kconfig
> +++ b/arch/arm/mach-exynos4/Kconfig
> @@ -35,6 +35,11 @@ config EXYNOS4_DEV_SYSMMU
>        help
>          Common setup code for SYSTEM MMU in EXYNOS4
>
> +config EXYNOS4_DEV_DWMCI
> +       bool
> +       help
> +         Compile in platform device definitions for DWMCI
> +
>  config EXYNOS4_SETUP_I2C1
>        bool
>        help
> @@ -200,6 +205,13 @@ comment "Configuration for HSMMC bus width"
>
>  menu "Use 8-bit bus width"
>
> +config EXYNOS4_DWMCI_8BIT
> +       bool "DWMCI with 8-bit bus"
> +       depends on EXYNOS4_DEV_DWMCI
> +       help
> +         Support DWMCI 8-bit bus.
> +         If selected, Channel 1 is disabled.

No it should be determined at runtime instead of compile time.

> +
>  config EXYNOS4_SDHCI_CH0_8BIT
>        bool "Channel 0 with 8-bit bus"
>        help
> diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile
> index 60fe5ec..eeeaada 100644
> --- a/arch/arm/mach-exynos4/Makefile
> +++ b/arch/arm/mach-exynos4/Makefile
> @@ -43,6 +43,7 @@ obj-y                                 += dev-audio.o
>  obj-$(CONFIG_EXYNOS4_DEV_AHCI)         += dev-ahci.o
>  obj-$(CONFIG_EXYNOS4_DEV_PD)           += dev-pd.o
>  obj-$(CONFIG_EXYNOS4_DEV_SYSMMU)       += dev-sysmmu.o
> +obj-$(CONFIG_EXYNOS4_DEV_DWMCI)        += dev-dwmci.o
>
>  obj-$(CONFIG_EXYNOS4_SETUP_FIMC)       += setup-fimc.o
>  obj-$(CONFIG_EXYNOS4_SETUP_I2C1)       += setup-i2c1.o
> diff --git a/arch/arm/mach-exynos4/dev-dwmci.c b/arch/arm/mach-exynos4/dev-dwmci.c
> new file mode 100644
> index 0000000..a0defa4
> --- /dev/null
> +++ b/arch/arm/mach-exynos4/dev-dwmci.c
> @@ -0,0 +1,88 @@
> +/*
> + * linuxarch/arm/mach-exynos4/dev-dwmci.c
> + *
> + * Copyright (c) 2011 Samsung Electronics Co., Ltd.
> + *             http://www.samsung.com
> + *
> + * Platform device for Synopsys DesignWare Mobile Storage IP
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/platform_device.h>
> +#include <linux/interrupt.h>
> +#include <linux/mmc/dw_mmc.h>
> +#include <linux/mmc/host.h>
> +#include <linux/io.h>
> +#include <linux/gpio.h>
> +
> +#include <plat/devs.h>
> +#include <plat/cpu.h>
> +#include <plat/gpio-cfg.h>
> +
> +#include <mach/map.h>
> +
> +#ifdef EXYNOS4_DWMCI_8BIT
> +#define BUS_WIDTH 8
> +#else
> +#define BUS_WIDTH 4
> +#endif

Right, each board can modify the bus width. so it needs the helper
function to setup.
> +
> +static int exynos4_dwmci_get_ocr(u32 slot_id)
> +{
> +       return MMC_VDD_32_33 | MMC_VDD_33_34;
> +}
> +
> +static int exynos4_dwmci_get_bus_wd(u32 slot_id)
> +{
> +       return BUS_WIDTH;
> +}
> +
> +static int exynos4_dwmci_init(u32 slot_id, irq_handler_t handler, void *data)
> +{
> +       return 0;
> +}
> +
> +static struct resource exynos4_dwmci_resource[] = {
> +       [0] = {
> +               .start = EXYNOS4_PA_DWMCI,
> +               .end   = EXYNOS4_PA_DWMCI + SZ_4K - 1,
> +               .flags = IORESOURCE_MEM,
> +       },
> +       [1] = {
> +               .start = IRQ_DWMCI,
> +               .end   = IRQ_DWMCI,
> +               .flags = IORESOURCE_IRQ,
> +       }
> +};
> +
> +static struct dw_mci_board exynos4_dwci_pdata = {
> +       .num_slots                      = 1,
> +       .quirks                         = DW_MCI_QUIRK_BROKEN_CARD_DETECTION,
> +       .bus_hz                         = 80*1000*1000,
> +       .detect_delay_ms        = 200,
> +       .init                           = exynos4_dwmci_init,
> +       .get_ocr                        = exynos4_dwmci_get_ocr,
> +       .get_bus_wd                     = exynos4_dwmci_get_bus_wd,
> +       .select_slot            = NULL,
> +};
> +
> +static u64 exynos4_dwmci_dmamask = DMA_BIT_MASK(32);
> +
> +struct platform_device exynos4_device_dwmci = {
> +       .name           = "dw_mmc",
> +       .id             = -1,
> +       .num_resources  = ARRAY_SIZE(exynos4_dwmci_resource),
> +       .resource       = exynos4_dwmci_resource,
> +       .dev            = {
> +               .dma_mask               = &exynos4_dwmci_dmamask,
> +               .coherent_dma_mask      = DMA_BIT_MASK(32),
> +               .platform_data  = &exynos4_dwci_pdata,
> +       },
> +};
> +
> diff --git a/arch/arm/mach-exynos4/include/mach/irqs.h b/arch/arm/mach-exynos4/include/mach/irqs.h
> index 5d03730..b720246 100644
> --- a/arch/arm/mach-exynos4/include/mach/irqs.h
> +++ b/arch/arm/mach-exynos4/include/mach/irqs.h
> @@ -107,6 +107,7 @@
>  #define IRQ_HSMMC1             COMBINER_IRQ(29, 1)
>  #define IRQ_HSMMC2             COMBINER_IRQ(29, 2)
>  #define IRQ_HSMMC3             COMBINER_IRQ(29, 3)
> +#define IRQ_DWMCI              COMBINER_IRQ(29, 4)
>
>  #define IRQ_MIPI_CSIS0         COMBINER_IRQ(30, 0)
>  #define IRQ_MIPI_CSIS1         COMBINER_IRQ(30, 1)
> diff --git a/arch/arm/mach-exynos4/include/mach/map.h b/arch/arm/mach-exynos4/include/mach/map.h
> index 0009e77..352e500 100644
> --- a/arch/arm/mach-exynos4/include/mach/map.h
> +++ b/arch/arm/mach-exynos4/include/mach/map.h
> @@ -94,6 +94,7 @@
>  #define EXYNOS4_PA_MIPI_CSIS1          0x11890000
>
>  #define EXYNOS4_PA_HSMMC(x)            (0x12510000 + ((x) * 0x10000))
> +#define EXYNOS4_PA_DWMCI               0x12550000
>
>  #define EXYNOS4_PA_SATA                        0x12560000
>  #define EXYNOS4_PA_SATAPHY             0x125D0000
> diff --git a/arch/arm/plat-samsung/include/plat/devs.h b/arch/arm/plat-samsung/include/plat/devs.h
> index e3b31c2..29fa1cf 100644
> --- a/arch/arm/plat-samsung/include/plat/devs.h
> +++ b/arch/arm/plat-samsung/include/plat/devs.h
> @@ -112,6 +112,7 @@ extern struct platform_device exynos4_device_i2s2;
>  extern struct platform_device exynos4_device_spdif;
>  extern struct platform_device exynos4_device_pd[];
>  extern struct platform_device exynos4_device_ahci;
> +extern struct platform_device exynos4_device_dwmci;
>
>  extern struct platform_device s5p6440_device_pcm;
>  extern struct platform_device s5p6440_device_iis;
> --
> 1.7.2.3
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>