Re: [PATCH Resend] ARM: EXYNOS: Map SYSRAM address through DT

Chanwoo Choi
2014-04-16T12:07:44Z

Hi,

On 04/16/2014 08:50 PM, Sachin Kamat wrote:
> Instead of hardcoding the SYSRAM details for each SoC,
> pass this information through device tree (DT) and make
> the code SoC agnostic.
>
> Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
> ---
> Rebased on latest linux-next.
> ---
> .../devicetree/bindings/arm/samsung-boards.txt | 11 +++
> arch/arm/boot/dts/exynos4210-universal_c210.dts | 9 ++
> arch/arm/boot/dts/exynos4210.dtsi | 10 ++
> arch/arm/boot/dts/exynos4x12.dtsi | 10 ++
> arch/arm/boot/dts/exynos5.dtsi | 5 +
> arch/arm/boot/dts/exynos5250.dtsi | 5 +
> arch/arm/boot/dts/exynos5420.dtsi | 5 +
> arch/arm/mach-exynos/exynos.c | 104 ++++++++------------
> arch/arm/mach-exynos/include/mach/map.h | 7 --
> 9 files changed, 95 insertions(+), 71 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/arm/samsung-boards.txt b/Documentation/devicetree/bindings/arm/samsung-boards.txt
> index 2168ed31e1b0..f79710eb7e79 100644
> --- a/Documentation/devicetree/bindings/arm/samsung-boards.txt
> +++ b/Documentation/devicetree/bindings/arm/samsung-boards.txt
> @@ -7,6 +7,17 @@ Required root node properties:
> (a) "samsung,smdkv310" - for Samsung's SMDKV310 eval board.
> (b) "samsung,exynos4210" - for boards based on Exynos4210 SoC.
>
> + - sysram node, specifying the type (secure or non-secure) of SYSRAM
> + - compatible: following types are supported
> + "samsung,exynos4210-sysram" : Secure SYSRAM
> + "samsung,exynos4210-sysram-ns" : Non-secure SYSRAM
> + - reg: address of SYSRAM bank
> +
> + sysram@02020000 {
> + compatible = "samsung,exynos4210-sysram";
> + reg = <0x02020000 0x1000>;
> + };
> +
> Optional:
> - firmware node, specifying presence and type of secure firmware:
> - compatible: only "samsung,secure-firmware" is currently supported
> diff --git a/arch/arm/boot/dts/exynos4210-universal_c210.dts b/arch/arm/boot/dts/exynos4210-universal_c210.dts
> index 63e34b24b04f..cf4158728108 100644
> --- a/arch/arm/boot/dts/exynos4210-universal_c210.dts
> +++ b/arch/arm/boot/dts/exynos4210-universal_c210.dts
> @@ -28,6 +28,15 @@
> bootargs = "console=ttySAC2,115200N8 root=/dev/mmcblk0p5 rw rootwait earlyprintk panic=5 maxcpus=1";
> };
>
> + sysram@02020000 {
> + status = "disabled";
> + };
> +
> + sysram@02025000 {
> + compatible = "samsung,exynos4210-sysram";
> + reg = <0x02025000 0x1000>;
> + };
> +
> mct@10050000 {
> compatible = "none";
> };
> diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi
> index cacf6140dd2f..a3f4bba099e6 100644
> --- a/arch/arm/boot/dts/exynos4210.dtsi
> +++ b/arch/arm/boot/dts/exynos4210.dtsi
> @@ -31,6 +31,16 @@
> pinctrl2 = &pinctrl_2;
> };
>
> + sysram@02020000 {
> + compatible = "samsung,exynos4210-sysram";
> + reg = <0x02020000 0x1000>;
> + };
> +
> + sysram-ns@0203F000 {
> + compatible = "samsung,exynos4210-sysram-ns";
> + reg = <0x0203F000 0x1000>;
> + };
> +
> pd_lcd1: lcd1-power-domain@10023CA0 {
> compatible = "samsung,exynos4210-pd";
> reg = <0x10023CA0 0x20>;
> diff --git a/arch/arm/boot/dts/exynos4x12.dtsi b/arch/arm/boot/dts/exynos4x12.dtsi
> index c4a9306f8529..d57e3120223f 100644
> --- a/arch/arm/boot/dts/exynos4x12.dtsi
> +++ b/arch/arm/boot/dts/exynos4x12.dtsi
> @@ -37,6 +37,16 @@
> interrupts = <2 2>, <3 2>, <18 2>, <19 2>;
> };
>
> + sysram@02020000 {
> + compatible = "samsung,exynos4210-sysram";
> + reg = <0x02020000 0x1000>;
> + };
> +
> + sysram-ns@0204F000 {
> + compatible = "samsung,exynos4210-sysram-ns";
> + reg = <0x0204F000 0x1000>;
> + };
> +
> pd_isp: isp-power-domain@10023CA0 {
> compatible = "samsung,exynos4210-pd";
> reg = <0x10023CA0 0x20>;
> diff --git a/arch/arm/boot/dts/exynos5.dtsi b/arch/arm/boot/dts/exynos5.dtsi
> index 79d0608d6dcc..c03bd09ec37d 100644
> --- a/arch/arm/boot/dts/exynos5.dtsi
> +++ b/arch/arm/boot/dts/exynos5.dtsi
> @@ -18,6 +18,11 @@
> / {
> interrupt-parent = <&gic>;
>
> + sysram@02020000 {
> + compatible = "samsung,exynos4210-sysram";
> + reg = <0x02020000 0x1000>;
> + };
> +
> chipid@10000000 {
> compatible = "samsung,exynos4210-chipid";
> reg = <0x10000000 0x100>;
> diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
> index 37423314a028..bae6c3f253f0 100644
> --- a/arch/arm/boot/dts/exynos5250.dtsi
> +++ b/arch/arm/boot/dts/exynos5250.dtsi
> @@ -72,6 +72,11 @@
> };
> };
>
> + sysram-ns@0204F000 {
> + compatible = "samsung,exynos4210-sysram-ns";
> + reg = <0x0204F000 0x1000>;
> + };
> +
> pd_gsc: gsc-power-domain@10044000 {
> compatible = "samsung,exynos4210-pd";
> reg = <0x10044000 0x20>;
> diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
> index c3a9a66c5767..217376fe1d82 100644
> --- a/arch/arm/boot/dts/exynos5420.dtsi
> +++ b/arch/arm/boot/dts/exynos5420.dtsi
> @@ -110,6 +110,11 @@
> };
> };
>
> + sysram-ns@02073000 {
> + compatible = "samsung,exynos4210-sysram-ns";
> + reg = <0x02073000 0x1000>;
> + };
> +
> clock: clock-controller@10010000 {
> compatible = "samsung,exynos5420-clock";
> reg = <0x10010000 0x30000>;
> diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
> index b32a907d021d..6a5fe18ec9b1 100644
> --- a/arch/arm/mach-exynos/exynos.c
> +++ b/arch/arm/mach-exynos/exynos.c
> @@ -114,51 +114,6 @@ static struct map_desc exynos4_iodesc[] __initdata = {
> },
> };
>
> -static struct map_desc exynos4_iodesc0[] __initdata = {
> - {
> - .virtual = (unsigned long)S5P_VA_SYSRAM,
> - .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
> - .length = SZ_4K,
> - .type = MT_DEVICE,
> - },
> -};
> -
> -static struct map_desc exynos4_iodesc1[] __initdata = {
> - {
> - .virtual = (unsigned long)S5P_VA_SYSRAM,
> - .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
> - .length = SZ_4K,
> - .type = MT_DEVICE,
> - },
> -};
> -
> -static struct map_desc exynos4210_iodesc[] __initdata = {
> - {
> - .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
> - .pfn = __phys_to_pfn(EXYNOS4210_PA_SYSRAM_NS),
> - .length = SZ_4K,
> - .type = MT_DEVICE,
> - },
> -};
> -
> -static struct map_desc exynos4x12_iodesc[] __initdata = {
> - {
> - .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
> - .pfn = __phys_to_pfn(EXYNOS4x12_PA_SYSRAM_NS),
> - .length = SZ_4K,
> - .type = MT_DEVICE,
> - },
> -};
> -
> -static struct map_desc exynos5250_iodesc[] __initdata = {
> - {
> - .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
> - .pfn = __phys_to_pfn(EXYNOS5250_PA_SYSRAM_NS),
> - .length = SZ_4K,
> - .type = MT_DEVICE,
> - },
> -};
> -
> static struct map_desc exynos5_iodesc[] __initdata = {
> {
> .virtual = (unsigned long)S3C_VA_SYS,
> @@ -181,11 +136,6 @@ static struct map_desc exynos5_iodesc[] __initdata = {
> .length = SZ_4K,
> .type = MT_DEVICE,
> }, {
> - .virtual = (unsigned long)S5P_VA_SYSRAM,
> - .pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM),
> - .length = SZ_4K,
> - .type = MT_DEVICE,
> - }, {
> .virtual = (unsigned long)S5P_VA_CMU,
> .pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
> .length = 144 * SZ_1K,
> @@ -268,6 +218,44 @@ static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
> return 1;
> }
>
> +struct __sysram_desc {
> + char name[32];
> + unsigned long addr;
> +};
> +
> +static struct __sysram_desc sysram_desc[] __initdata = {
> + {
> + .name = "samsung,exynos4210-sysram",
> + .addr = (unsigned long)S5P_VA_SYSRAM,
> + }, {
> + .name = "samsung,exynos4210-sysram-ns",
> + .addr = (unsigned long)S5P_VA_SYSRAM_NS,
> + },
> +};
> +
> +static int __init exynos_fdt_map_sysram(unsigned long node, const char *uname,
> + int depth, void *data)
> +{
> + struct map_desc iodesc;
> + __be32 *reg;
> + unsigned long len;
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(sysram_desc); i++) {
> + if (of_flat_dt_is_compatible(node, sysram_desc[i].name)) {
> + reg = of_get_flat_dt_prop(node, "reg", &len);
> + if (!reg || len != (sizeof(unsigned long) * 2))
> + return -ENODEV;
> + iodesc.virtual = sysram_desc[i].addr;
> + iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
> + iodesc.length = be32_to_cpu(reg[1]);
> + iodesc.type = MT_DEVICE;
> + iotable_init(&iodesc, 1);
> + }
> + }
> + return 0;
> +}
> +
> /*
> * exynos_map_io
> *
> @@ -280,20 +268,6 @@ static void __init exynos_map_io(void)
>
> if (soc_is_exynos5())
> iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
> -
> - if (soc_is_exynos4210()) {
> - if (samsung_rev() == EXYNOS4210_REV_0)
> - iotable_init(exynos4_iodesc0,
> - ARRAY_SIZE(exynos4_iodesc0));
> - else
> - iotable_init(exynos4_iodesc1,
> - ARRAY_SIZE(exynos4_iodesc1));
> - iotable_init(exynos4210_iodesc, ARRAY_SIZE(exynos4210_iodesc));
> - }
> - if (soc_is_exynos4212() || soc_is_exynos4412())
> - iotable_init(exynos4x12_iodesc, ARRAY_SIZE(exynos4x12_iodesc));
> - if (soc_is_exynos5250())
> - iotable_init(exynos5250_iodesc, ARRAY_SIZE(exynos5250_iodesc));
> }
>
> void __init exynos_init_io(void)
> @@ -306,6 +280,8 @@ void __init exynos_init_io(void)
> s5p_init_cpu(S5P_VA_CHIPID);
>
> exynos_map_io();
> +
> + of_scan_flat_dt(exynos_fdt_map_sysram, NULL);
> }
>
> struct bus_type exynos_subsys = {
> diff --git a/arch/arm/mach-exynos/include/mach/map.h b/arch/arm/mach-exynos/include/mach/map.h
> index 7b046b59d9ec..548269a60634 100644
> --- a/arch/arm/mach-exynos/include/mach/map.h
> +++ b/arch/arm/mach-exynos/include/mach/map.h
> @@ -23,13 +23,6 @@
>
> #include <plat/map-s5p.h>
>
> -#define EXYNOS4_PA_SYSRAM0 0x02025000
> -#define EXYNOS4_PA_SYSRAM1 0x02020000
> -#define EXYNOS5_PA_SYSRAM 0x02020000
> -#define EXYNOS4210_PA_SYSRAM_NS 0x0203F000
> -#define EXYNOS4x12_PA_SYSRAM_NS 0x0204F000
> -#define EXYNOS5250_PA_SYSRAM_NS 0x0204F000
> -
> #define EXYNOS_PA_CHIPID 0x10000000
>
> #define EXYNOS4_PA_SYSCON 0x10010000
>

I tested this patch to turn on CPU1 of Exynos3250
without mapping static SYSRAM memory.

Tested-by: Chanwoo Choi <cw00.choi@samsung.com>

Thanks,
Chanwoo Choi