Re: [PATCH 1/4] ARM: rcm-k1879xb1: Add support for K1879XB1 SoC

From: Rob Herring
Date: Tue Jun 23 2015 - 22:15:43 EST

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On Tue, Jun 23, 2015 at 10:50 AM, Andrew Andrianov <andrew@xxxxxxxxxx> wrote:
> This patch adds basic support for RC Module's
> K1879XB1YA SoC.
>
> K1879XB1YA is a hybrid SoC with one ARM1176JZF-S
> core running linux and one NeuroMatrix DSP core.
>
> http://www.module.ru/en/catalog/micro/mikroshema_dekodera_cifrovogo_televizionnogo_signala_sbis_k1879hb1ya/
> http://www.module.ru/en/catalog/micro/micro_pc/
>
> Signed-off-by: Andrew Andrianov <andrew@xxxxxxxxxx>
> ---
> arch/arm/Kconfig | 18 +++
> arch/arm/Kconfig.debug | 5 +-
> arch/arm/Makefile | 1 +
> arch/arm/mach-rcm-k1879xb1/Kconfig | 0
> arch/arm/mach-rcm-k1879xb1/Makefile | 2 +
> arch/arm/mach-rcm-k1879xb1/Makefile.boot | 4 +
> arch/arm/mach-rcm-k1879xb1/board-dt.c | 152 +++++++++++++++++++++
> arch/arm/mach-rcm-k1879xb1/cpuidle.c | 48 +++++++
> arch/arm/mach-rcm-k1879xb1/include/mach/hardware.h | 75 ++++++++++
> .../mach-rcm-k1879xb1/include/mach/uncompress.h | 54 ++++++++
> 10 files changed, 358 insertions(+), 1 deletion(-)
> create mode 100644 arch/arm/mach-rcm-k1879xb1/Kconfig
> create mode 100644 arch/arm/mach-rcm-k1879xb1/Makefile
> create mode 100644 arch/arm/mach-rcm-k1879xb1/Makefile.boot
> create mode 100644 arch/arm/mach-rcm-k1879xb1/board-dt.c
> create mode 100644 arch/arm/mach-rcm-k1879xb1/cpuidle.c
> create mode 100644 arch/arm/mach-rcm-k1879xb1/include/mach/hardware.h
> create mode 100644 arch/arm/mach-rcm-k1879xb1/include/mach/uncompress.h
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 45df48b..2de4d2a 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -619,6 +619,24 @@ config ARCH_PXA
> help
> Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
>
> +config ARCH_RCM_K1879XB1
> + bool "RC Module K1879XB1YA"

This config entry belongs in your mach dir and should depend on ARCH_MULTI_V6

> + depends on MMU
> + select CPU_V6
> + select ARM_AMBA
> + select ARM_VIC
> + select SPARSE_IRQ

Multi-platform will select this for you.

> + select GENERIC_GPIO

Don't think this is needed.

> + select COMMON_CLK

Multi-platform will select this for you.

> + select USB_ARCH_HAS_EHCI
> + select USB_ARCH_HAS_OHCI

Don't think these are needed anymore.

> + select ARCH_REQUIRE_GPIOLIB
> + select NEED_MACH_GPIO_H

Why?

> + select GENERIC_CLOCKEVENTS

Multi-platform will select this for you.

> + select CLKSRC_ARM_DIT
> + help
> + Support for RC Module's K1879X SoCs
> +
> config ARCH_SHMOBILE_LEGACY
> bool "Renesas ARM SoCs (non-multiplatform)"
> select ARCH_SHMOBILE
> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
> index 0c12ffb..48ee54c 100644
> --- a/arch/arm/Kconfig.debug
> +++ b/arch/arm/Kconfig.debug
> @@ -1318,7 +1318,8 @@ config DEBUG_UART_8250
> (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
> ARCH_GEMINI || ARCH_IOP13XX || ARCH_IOP32X || \
> ARCH_IOP33X || ARCH_IXP4XX || \
> - ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC
> + ARCH_LPC32XX || ARCH_MV78XX0 || ARCH_ORION5X || ARCH_RPC || \
> + ARCH_RCM_K1879XB1
>
> # Compatibility options for BCM63xx
> config DEBUG_UART_BCM63XX
> @@ -1417,6 +1418,7 @@ config DEBUG_UART_PHYS
> default 0xfffb9800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3
> default 0xfffe8600 if DEBUG_UART_BCM63XX
> default 0xfffff700 if ARCH_IOP33X
> + default 0x2002b000 if ARCH_RCM_K1879XB1

This cannot depend on ARCH_RCM_K1879XB1 once you enable multi-platform build.

> depends on ARCH_EP93XX || \
> DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
> DEBUG_LL_UART_EFM32 || \
> @@ -1511,6 +1513,7 @@ config DEBUG_UART_VIRT
> default 0xfefff700 if ARCH_IOP33X
> default 0xff003000 if DEBUG_U300_UART
> default 0xffd01000 if DEBUG_HIP01_UART
> + default 0xf802b000 if ARCH_RCM_K1879XB1

ditto.

> default DEBUG_UART_PHYS if !MMU
> depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
> DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 985227c..9beb65f 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -184,6 +184,7 @@ machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2
> machine-$(CONFIG_ARCH_ORION5X) += orion5x
> machine-$(CONFIG_ARCH_PICOXCELL) += picoxcell
> machine-$(CONFIG_ARCH_PXA) += pxa
> +machine-$(CONFIG_ARCH_RCM_K1879XB1) += rcm-k1879xb1
> machine-$(CONFIG_ARCH_QCOM) += qcom
> machine-$(CONFIG_ARCH_REALVIEW) += realview
> machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip
> diff --git a/arch/arm/mach-rcm-k1879xb1/Kconfig b/arch/arm/mach-rcm-k1879xb1/Kconfig
> new file mode 100644
> index 0000000..e69de29
> diff --git a/arch/arm/mach-rcm-k1879xb1/Makefile b/arch/arm/mach-rcm-k1879xb1/Makefile
> new file mode 100644
> index 0000000..324af07
> --- /dev/null
> +++ b/arch/arm/mach-rcm-k1879xb1/Makefile
> @@ -0,0 +1,2 @@
> +obj-y += board-dt.o cpuidle.o
> +
> diff --git a/arch/arm/mach-rcm-k1879xb1/Makefile.boot b/arch/arm/mach-rcm-k1879xb1/Makefile.boot
> new file mode 100644
> index 0000000..4075590
> --- /dev/null
> +++ b/arch/arm/mach-rcm-k1879xb1/Makefile.boot
> @@ -0,0 +1,4 @@
> + zreladdr-y := 0x40008000
> +params_phys-y := 0x40000100
> +initrd_phys-y := 0x40800000

You don't need this file on multi-platform.

> +
> diff --git a/arch/arm/mach-rcm-k1879xb1/board-dt.c b/arch/arm/mach-rcm-k1879xb1/board-dt.c
> new file mode 100644
> index 0000000..00084ad
> --- /dev/null
> +++ b/arch/arm/mach-rcm-k1879xb1/board-dt.c
> @@ -0,0 +1,152 @@
> +/*
> + * arch/arm/mach-rcm-k1879/board-dt.c
> + *
> + * Copyright (C) 2011-2015 RC Module
> + *
> + * Sergey Mironov <ierton@xxxxxxxxx>
> + * Andrew Andrianov <andrew@xxxxxxxxxx>
> + *
> + * 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.

You sure you want GPLv3?

> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#include <linux/of_address.h>
> +#include <linux/of_irq.h>
> +#include <linux/of_platform.h>
> +#include <asm/mach/map.h>
> +#include <asm/mach/arch.h>
> +#include <mach/hardware.h>
> +
> +static struct map_desc k1879_io_desc[] __initdata = {
> + {
> + .virtual = RCM_K1879_AREA0_VIRT_BASE,
> + .pfn = __phys_to_pfn(RCM_K1879_AREA0_PHYS_BASE),
> + .length = RCM_K1879_AREA0_SIZE,
> + .type = MT_DEVICE,
> + },
> + {
> + .virtual = RCM_K1879_AREA1_VIRT_BASE,
> + .pfn = __phys_to_pfn(RCM_K1879_AREA1_PHYS_BASE),
> + .length = RCM_K1879_AREA1_SIZE,
> + .type = MT_DEVICE,

You should use ioremap where ever possible instead of these.

> + },
> +};
> +
> +static void __iomem *g_k1879_mif;
> +
> +static void __iomem *k1879_mif_base(void)
> +{
> + BUG_ON(!g_k1879_mif);
> + return g_k1879_mif;
> +}
> +
> +static void __iomem *k1879_sctl_base(void)
> +{
> + return (void __iomem *)RCM_K1879_SCTL_VIRT_BASE;
> +}
> +
> +static void k1879_level_irq_i2c0_fixup(unsigned int irq, struct irq_desc *desc)
> +{
> + writel(1, k1879_mif_base() + RCM_K1879_MIF_I2C_INT_STAT);
> + handle_level_irq(irq, desc);
> +}
> +
> +static void k1879_level_irq_i2c1_fixup(unsigned int irq, struct irq_desc *desc)
> +{
> + writel(1 << 0, k1879_sctl_base() + RCM_K1879_SCTL_INT_P_OUT);
> + handle_level_irq(irq, desc);
> +}
> +
> +static void k1879_level_irq_i2c2_fixup(unsigned int irq, struct irq_desc *desc)
> +{
> + writel(1 << 1, k1879_sctl_base() + RCM_K1879_SCTL_INT_P_OUT);
> + handle_level_irq(irq, desc);
> +}
> +
> +static void k1879_level_irq_i2c3_fixup(unsigned int irq, struct irq_desc *desc)
> +{
> + writel(1 << 2, k1879_sctl_base() + RCM_K1879_SCTL_INT_P_OUT);
> + handle_level_irq(irq, desc);
> +}

What are all these for? They probably belong somewhere else.

> +
> +static void __init k1879_map_io(void)
> +{
> + iotable_init(k1879_io_desc, ARRAY_SIZE(k1879_io_desc));
> +}
> +
> +static const struct of_device_id i2c_of_match[] __initconst = {
> + { .compatible = "rcm,i2c-ocores", },
> + {}
> +};
> +
> +static void __init setup_i2c_fixup(u64 base,
> + void (*fixup_handler)(unsigned int irq,
> + struct irq_desc *desc))
> +{
> + struct device_node *np;
> + int irq;
> +
> + np = of_find_matching_node_by_address(NULL, i2c_of_match, base);
> + BUG_ON(!np);

This may not print if your serial console is not up. You may want to
use WARN instead so the boot continues.

> + irq = of_irq_get(np, 0);
> + irq_set_handler(irq, fixup_handler);
> +}
> +
> +static void __init k1879_dt_mach_init(void)
> +{
> + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
> + g_k1879_mif = ioremap_nocache(RCM_K1879_MIF_PHYS_BASE,
> + RCM_K1879_MIF_SIZE);
> + BUG_ON(!g_k1879_mif);
> +
> + /* Setup i2c interrupt fixups */
> + setup_i2c_fixup(RCM_K1879_GRI2C0_PHYS_BASE, k1879_level_irq_i2c0_fixup);
> + setup_i2c_fixup(RCM_K1879_GRI2C1_PHYS_BASE, k1879_level_irq_i2c1_fixup);
> + setup_i2c_fixup(RCM_K1879_GRI2C2_PHYS_BASE, k1879_level_irq_i2c2_fixup);
> + setup_i2c_fixup(RCM_K1879_GRI2C3_PHYS_BASE, k1879_level_irq_i2c3_fixup);
> + /* I2C0 (Internal, HDMI) needs some extra love */
> + do {
> + void __iomem *mif;
> +
> + mif = k1879_mif_base();
> + writel(1, mif + RCM_K1879_MIF_I2C_INT_TYPE_ENA);
> + writel(1, mif + RCM_K1879_MIF_I2C_INT_TYPE);
> + writel(1, mif + RCM_K1879_MIF_I2C_INT_ENA);
> + } while (0);
> +}
> +
> +void k1879_restart(enum reboot_mode mode, const char *cmd)
> +{
> + /* The recommended way to do a soft-reboot on this platform
> + is write directly to watchdog registers and cause an immediate
> + system reboot
> + */
> + void __iomem *regs;
> +
> + pr_info("k1879: Requested system restart\n");
> + regs = ioremap_nocache(0x20025000, 0xfff);
> + iowrite32(1, (regs + 0xf00));
> + iowrite32(1, (regs + 0xf04));
> + /* Goodbye! */
> +}
> +
> +static const char * const k1879_dt_match[] = {
> + "rcm,mb7707",
> + "rcm,k1879xb1ya",
> + NULL
> +};
> +
> +DT_MACHINE_START(K1879, "RC Module K1879XB1YA (Device Tree)")
> + .map_io = k1879_map_io,
> + .init_machine = k1879_dt_mach_init,
> + .dt_compat = k1879_dt_match,
> + .restart = k1879_restart
> +MACHINE_END
> diff --git a/arch/arm/mach-rcm-k1879xb1/cpuidle.c b/arch/arm/mach-rcm-k1879xb1/cpuidle.c
> new file mode 100644
> index 0000000..7c621b6
> --- /dev/null
> +++ b/arch/arm/mach-rcm-k1879xb1/cpuidle.c

This should be a separate patch and located in drivers/cpuidle/

> @@ -0,0 +1,48 @@
> +/*
> + * CPU idle for RC Module K1879XB1YA SoC
> + *
> + * Copyright (C) 2015 RC Module.
> + * http://www.module.ru/
> + *
> + * Andrew Andrianov <andrew@xxxxxxxxxx>
> + *
> + * Based on Davinci CPU idle code
> + * (arch/arm/mach-davinci/cpuidle.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/io.h>
> +#include <linux/platform_device.h>
> +#include <linux/cpuidle.h>
> +#include <asm/cpuidle.h>
> +
> +/*
> + * We only enable WFI here, since DDR will enter self-refresh
> + * on it's own when it can (bootloader takes care to configure that)
> + */
> +
> +static struct cpuidle_driver rcm_idle_driver = {
> + .name = "rcm_k1879xb1_idle",
> + .states[0] = ARM_CPUIDLE_WFI_STATE,
> + .state_count = 1,
> +};
> +
> +static int __init rcm_cpuidle_probe(struct platform_device *pdev)
> +{
> + return cpuidle_register(&rcm_idle_driver, NULL);
> +}
> +
> +static struct platform_driver rcm_cpuidle_driver = {
> + .driver = {
> + .name = "cpuidle-rcm-k1879xb1",
> + },
> +};
> +
> +static int __init rcm_cpuidle_init(void)
> +{
> + return platform_driver_probe(&rcm_cpuidle_driver, rcm_cpuidle_probe);
> +}
> +device_initcall(rcm_cpuidle_init);
> diff --git a/arch/arm/mach-rcm-k1879xb1/include/mach/hardware.h b/arch/arm/mach-rcm-k1879xb1/include/mach/hardware.h
> new file mode 100644
> index 0000000..66c5b65
> --- /dev/null
> +++ b/arch/arm/mach-rcm-k1879xb1/include/mach/hardware.h
> @@ -0,0 +1,75 @@
> +/*
> + * arch/arm/mach-rcm-k1879/include/mach/hardware.h
> + *
> + * Copyright (C) 2011-2015 RC Module
> + *
> + * Sergey Mironov <ierton@xxxxxxxxx>
> + * Andrew Andrianov <andrew@xxxxxxxxxx>
> + *
> + * 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.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#ifndef ASM_RCM_K1879_HARDWARE_H
> +#define ASM_RCM_K1879_HARDWARE_H
> +
> +#define RCM_K1879_PHYS(bus, off) (RCM_K1879_##bus##_PHYS_BASE + (off))
> +#define RCM_K1879_VIRT(bus, off) (RCM_K1879_##bus##_VIRT_BASE + (off))
> +
> +/* Areas of system memory space */
> +#define RCM_K1879_AREA0_PHYS_BASE 0x20000000
> +#define RCM_K1879_AREA0_SIZE SZ_512K
> +#define RCM_K1879_AREA0_VIRT_BASE 0xf8000000
> +
> +#define RCM_K1879_AREA1_PHYS_BASE 0x80000000
> +#define RCM_K1879_AREA1_SIZE SZ_2M
> +#define RCM_K1879_AREA1_VIRT_BASE 0xf8100000
> +
> +/*
> + * Bare minimum required to bring up the board.
> + * The rest comes from DeviceTree
> + */
> +
> +#define RCM_K1879_UART0_OFF 0x0002b000
> +#define RCM_K1879_UART0_PHYS_BASE RCM_K1879_PHYS(AREA0, RCM_K1879_UART0_OFF)
> +#define RCM_K1879_UART0_VIRT_BASE RCM_K1879_VIRT(AREA0, RCM_K1879_UART0_OFF)
> +
> +#define RCM_K1879_GRI2C1_OFF 0x00021000
> +#define RCM_K1879_GRI2C1_PHYS_BASE RCM_K1879_PHYS(AREA0, RCM_K1879_GRI2C1_OFF)
> +#define RCM_K1879_GRI2C1_VIRT_BASE RCM_K1879_VIRT(AREA0, RCM_K1879_GRI2C1_OFF)
> +
> +#define RCM_K1879_GRI2C2_OFF 0x00026000
> +#define RCM_K1879_GRI2C2_PHYS_BASE RCM_K1879_PHYS(AREA0, RCM_K1879_GRI2C2_OFF)
> +#define RCM_K1879_GRI2C2_VIRT_BASE RCM_K1879_VIRT(AREA0, RCM_K1879_GRI2C2_OFF)
> +
> +#define RCM_K1879_GRI2C3_OFF 0x0002d000
> +#define RCM_K1879_GRI2C3_PHYS_BASE RCM_K1879_PHYS(AREA0, RCM_K1879_GRI2C3_OFF)
> +#define RCM_K1879_GRI2C3_VIRT_BASE RCM_K1879_VIRT(AREA0, RCM_K1879_GRI2C3_OFF)
> +
> +#define RCM_K1879_SCTL_OFF 0x0003c000
> +#define RCM_K1879_SCTL_PHYS_BASE RCM_K1879_PHYS(AREA0, RCM_K1879_SCTL_OFF)
> +#define RCM_K1879_SCTL_VIRT_BASE RCM_K1879_VIRT(AREA0, RCM_K1879_SCTL_OFF)
> +#define RCM_K1879_SCTL_SIZE 0x1000
> +
> +#define RCM_K1879_MIF_OFF 0x00172000
> +#define RCM_K1879_MIF_PHYS_BASE RCM_K1879_PHYS(AREA1, RCM_K1879_MIF_OFF)
> +#define RCM_K1879_MIF_SIZE 0x100
> +
> +#define RCM_K1879_GRI2C0_OFF 0x00171000
> +#define RCM_K1879_GRI2C0_PHYS_BASE RCM_K1879_PHYS(AREA1, RCM_K1879_GRI2C0_OFF)
> +
> +#define RCM_K1879_MIF_I2C_INT_TYPE_ENA 0x94
> +#define RCM_K1879_MIF_I2C_INT_TYPE 0x98
> +#define RCM_K1879_MIF_I2C_INT_ENA 0x9C
> +#define RCM_K1879_MIF_I2C_INT_STAT 0xA0
> +#define RCM_K1879_SCTL_INT_P_OUT 0x08

Really, all these addresses at least should come from the DT.

> +
> +#endif
> diff --git a/arch/arm/mach-rcm-k1879xb1/include/mach/uncompress.h b/arch/arm/mach-rcm-k1879xb1/include/mach/uncompress.h
> new file mode 100644
> index 0000000..5f4e500
> --- /dev/null
> +++ b/arch/arm/mach-rcm-k1879xb1/include/mach/uncompress.h

This is not needed on a multi-platform enabled mach.

> @@ -0,0 +1,54 @@
> +/*
> + * arch/arm/mach-rcm-k1879/include/mach/uncompress.h
> + *
> + * Copyright (C) 2011 RC Module
> + *
> + * Sergey Mironov <ierton@xxxxxxxxx>
> + *
> + * 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.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#ifndef ASM_ARM_ARCH_IO_H
> +#define ASM_ARM_ARCH_IO_H
> +
> +#include <mach/hardware.h>
> +
> +#define UART_THR ((volatile unsigned char *)(RCM_K1879_UART0_PHYS_BASE + 0x0))
> +#define UART_LSR ((volatile unsigned char *)(RCM_K1879_UART0_PHYS_BASE + 0x14))
> +
> +#define LSR_THRE 0x20
> +
> +static void putc(const char c)
> +{
> + int i;
> +
> + for (i = 0; i < 0x1000; i++) {
> + /* Transmit fifo not full? */
> + if (*UART_LSR & LSR_THRE)
> + break;
> + }
> +
> + *UART_THR = c;
> +}
> +
> +static void flush(void)
> +{
> +}
> +
> +/*
> + * nothing to do
> + */
> +#define arch_decomp_setup()
> +#define arch_decomp_wdog()
> +
> +#endif
> +
> --
> 2.1.4
>
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