From: "ext Kanigeri, Hari" <h-kanigeri2@xxxxxx>
Subject: [RFC][PATCH 2/3] ARM:OMAP4 iommu:add omap4 support in iommu
Date: Fri, 24 Jul 2009 19:22:32 +0200
> This patch adds omap4 support in iommu
> module. This creates OMAP4 platform specific file
> for iommu and defines the Ducati MMU fault interrupt.
>
> Signed-off-by: Hari Kanigeri <h-kanigeri2@xxxxxx>
> ---
> arch/arm/mach-omap2/omap4-iommu.c | 112 ++++++++++++++++++++++++++++++++
> arch/arm/plat-omap/include/mach/irqs.h | 2 +-
> 2 files changed, 113 insertions(+), 1 deletions(-)
> create mode 100644 arch/arm/mach-omap2/omap4-iommu.c
>
> diff --git a/arch/arm/mach-omap2/omap4-iommu.c b/arch/arm/mach-omap2/omap4-iommu.c
> new file mode 100644
> index 0000000..5a782df
> --- /dev/null
> +++ b/arch/arm/mach-omap2/omap4-iommu.c
> @@ -0,0 +1,112 @@
> +/*
> + * omap iommu: omap4 device registration
> + *
> + * Copyright (C) 2009-2010 Nokia Corporation
> + *
> + * Written by Hari Kanigeri <h-kanigeri2@xxxxxx>
> + *
> + * Added support for OMAP4. This is based on original file
> + * omap3-iommu.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/platform_device.h>
> +
> +#include <mach/iommu.h>
> +#include <mach/irqs.h>
> +
> +#define OMAP4_MMU1_BASE 0x55082000
> +#define OMAP4_MMU2_BASE 0x4A066000
> +
> +#define OMAP4_MMU1_IRQ INT_44XX_DUCATI_MMU_IRQ
> +#define OMAP4_MMU2_IRQ INT_44XX_DSP_MMU
> +
> +
> +
> +static unsigned long iommu_base[] __initdata = {
> + OMAP4_MMU1_BASE,
> + OMAP4_MMU2_BASE,
> +};
> +
> +static int iommu_irq[] __initdata = {
> + OMAP4_MMU1_IRQ,
> + OMAP4_MMU2_IRQ,
> +};
> +
> +static const struct iommu_platform_data omap4_iommu_pdata[] __initconst = {
> + {
> + .name = "ducati",
> + .nr_tlb_entries = 32,
> + .clk_name = "ducati_ick",
> + },
> +#if defined(CONFIG_MPU_TESLA_IOMMU)
> + {
> + .name = "tesla",
> + .nr_tlb_entries = 32,
> + .clk_name = "tesla_ick",
> + },
> +#endif
> +};
If iommu is used as a character device driver, is the above config still necessary?
> +#define NR_IOMMU_DEVICES ARRAY_SIZE(omap4_iommu_pdata)
> +
> +static struct platform_device *omap4_iommu_pdev[NR_IOMMU_DEVICES];
> +
> +static int __init omap4_iommu_init(void)
> +{
> + int i, err;
> +
> + for (i = 0; i < NR_IOMMU_DEVICES; i++) {
> + struct platform_device *pdev;
> + struct resource res[2];
> +
> + pdev = platform_device_alloc("omap-iommu", i);
> + if (!pdev) {
> + err = -ENOMEM;
> + goto err_out;
> + }
> +
> + memset(res, 0, sizeof(res));
> + res[0].start = iommu_base[i];
> + res[0].end = iommu_base[i] + MMU_REG_SIZE - 1;
> + res[0].flags = IORESOURCE_MEM;
> + res[1].start = res[1].end = iommu_irq[i];
> + res[1].flags = IORESOURCE_IRQ;
> +
> + err = platform_device_add_resources(pdev, res,
> + ARRAY_SIZE(res));
> + if (err)
> + goto err_out;
> + err = platform_device_add_data(pdev, &omap4_iommu_pdata[i],
> + sizeof(omap4_iommu_pdata[0]));
> + if (err)
> + goto err_out;
> + err = platform_device_add(pdev);
> + if (err)
> + goto err_out;
> + omap4_iommu_pdev[i] = pdev;
> + }
> + return 0;
> +
> +err_out:
> + while (i--)
> + platform_device_put(omap4_iommu_pdev[i]);
> + return err;
> +}
> +module_init(omap4_iommu_init);
> +
> +static void __exit omap4_iommu_exit(void)
> +{
> + int i;
> +
> + for (i = 0; i < NR_IOMMU_DEVICES; i++)
> + platform_device_unregister(omap4_iommu_pdev[i]);
> +}
> +module_exit(omap4_iommu_exit);
> +
> +MODULE_AUTHOR("Hiroshi DOYU, Hari Kanigeri");
> +MODULE_DESCRIPTION("omap iommu: omap4 device registration");
> +MODULE_LICENSE("GPL v2");
> +
> diff --git a/arch/arm/plat-omap/include/mach/irqs.h b/arch/arm/plat-omap/include/mach/irqs.h
> index fb7cb77..34b6d09 100644
> --- a/arch/arm/plat-omap/include/mach/irqs.h
> +++ b/arch/arm/plat-omap/include/mach/irqs.h
> @@ -511,7 +511,7 @@
> #define INT_44XX_TLL_IRQ (78 + IRQ_GIC_START)
> #define INT_44XX_PARTHASH_IRQ (79 + IRQ_GIC_START)
> #define INT_44XX_MMC3_IRQ (94 + IRQ_GIC_START)
> -
> +#define INT_44XX_DUCATI_MMU_IRQ (100 + IRQ_GIC_START)
>
> /* Max. 128 level 2 IRQs (OMAP1610), 192 GPIOs (OMAP730/850) and
> * 16 MPUIO lines */
> --
> 1.5.4.3
>
>
> Thank you,
> Best regards,
> Hari
>
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