This patch adds basic support for the Broadcom BCM63138 DSL SoC which is using a dual-core Cortex A9 system. Add the very minimum required code boot Linux on this SoC.
Due to the two specific register address spaces located at 0x8000_0000 and 0xfffe_0000, we need to setup a specific iotable descriptor for those to be remapped at the expected virtual addresses. Finally, the PL310 cache controller requires a bit of tweaking before handing its initialization over l2x0_of_init(), this is also taken care of to make sure that its size is properly configured. Signed-off-by: Florian Fainelli <[email protected]> --- .../devicetree/bindings/arm/bcm/bcm63138.txt | 9 +++ arch/arm/mach-bcm/Kconfig | 20 +++++ arch/arm/mach-bcm/Makefile | 1 + arch/arm/mach-bcm/bcm63xx.h | 29 +++++++ arch/arm/mach-bcm/board_bcm63xx.c | 94 ++++++++++++++++++++++ 5 files changed, 153 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/bcm/bcm63138.txt create mode 100644 arch/arm/mach-bcm/bcm63xx.h create mode 100644 arch/arm/mach-bcm/board_bcm63xx.c diff --git a/Documentation/devicetree/bindings/arm/bcm/bcm63138.txt b/Documentation/devicetree/bindings/arm/bcm/bcm63138.txt new file mode 100644 index 000000000000..bd49987a8812 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/bcm/bcm63138.txt @@ -0,0 +1,9 @@ +Broadcom BCM63138 DSL System-on-a-Chip device tree bindings +----------------------------------------------------------- + +Boards compatible with the BCM63138 DSL System-on-a-Chip should have the +following properties: + +Required root node property: + +compatible: should be "brcm,bcm63138" diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig index 49c914cd9c7a..26b51bcf878c 100644 --- a/arch/arm/mach-bcm/Kconfig +++ b/arch/arm/mach-bcm/Kconfig @@ -69,6 +69,26 @@ config ARCH_BCM_5301X different SoC or with the older BCM47XX and BCM53XX based network SoC using a MIPS CPU, they are supported by arch/mips/bcm47xx +config ARCH_BCM_63XX + bool "Broadcom BCM63xx DSL SoC" if ARCH_MULTI_V7 + depends on MMU + select ARM_ERRATA_754322 + select ARM_ERRATA_764369 if SMP + select ARM_GIC + select ARM_GLOBAL_TIMER + select CACHE_L2X0 + select COMMON_CLK + select CPU_V7 + select GENERIC_CLOCKEVENTS + select HAVE_ARM_ARCH_TIMER + select HAVE_ARM_TWD if SMP + select HAVE_ARM_SCU if SMP + select HAVE_SMP + help + This enables support for systems based on Broadcom DSL SoCs. + It currently supports the 'BCM63XX' ARM-based family, which includes + the BCM63138 variant. + endmenu endif diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile index a326b28c4406..c24ba586297d 100644 --- a/arch/arm/mach-bcm/Makefile +++ b/arch/arm/mach-bcm/Makefile @@ -17,3 +17,4 @@ obj-$(CONFIG_ARCH_BCM2835) += board_bcm2835.o plus_sec := $(call as-instr,.arch_extension sec,+sec) AFLAGS_bcm_kona_smc_asm.o :=-Wa,-march=armv7-a$(plus_sec) obj-$(CONFIG_ARCH_BCM_5301X) += bcm_5301x.o +obj-$(CONFIG_ARCH_BCM_63XX) := board_bcm63xx.o diff --git a/arch/arm/mach-bcm/bcm63xx.h b/arch/arm/mach-bcm/bcm63xx.h new file mode 100644 index 000000000000..95872c8131f6 --- /dev/null +++ b/arch/arm/mach-bcm/bcm63xx.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2014 Broadcom Corporation + * + * 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 version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __ARM_BCM63XX_H +#define __ARM_BCM63XX_H + +#define IO_ADDRESS(x) (((x) & 0x00ffffff) + 0xfc000000) + +/* AHB register space */ +#define BCM63XX_AHB_PHYS 0x80001000 +#define BCM63XX_AHB_VIRT IO_ADDRESS(BCM63XX_AHB_PHYS) +#define BCM63XX_AHB_SIZE 0x800000 + +/* PERIPH (legacy) register space */ +#define BCM63XX_PERIPH_PHYS 0xfffe8000 +#define BCM63XX_PERIPH_VIRT IO_ADDRESS(BCM63XX_PERIPH_PHYS) +#define BCM63XX_PERIPH_SIZE 0x10000 + +#endif /* __ARM_BCM63XX_H */ diff --git a/arch/arm/mach-bcm/board_bcm63xx.c b/arch/arm/mach-bcm/board_bcm63xx.c new file mode 100644 index 000000000000..a779aca673c4 --- /dev/null +++ b/arch/arm/mach-bcm/board_bcm63xx.c @@ -0,0 +1,94 @@ +/* + * Copyright (C) 2014 Broadcom Corporation + * + * 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 version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; 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_platform.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/clocksource.h> +#include <linux/irqchip.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <asm/mach/time.h> +#include <asm/hardware/cache-l2x0.h> + +#include "bcm63xx.h" + +static void __init bcm63xx_l2cc_init(void) +{ + u32 auxctl_val = 0, auxctl_msk = ~0UL; + + /* 16-way cache */ + auxctl_val |= (1 << L2X0_AUX_CTRL_ASSOCIATIVITY_SHIFT); + auxctl_msk &= ~(1 << L2X0_AUX_CTRL_ASSOCIATIVITY_SHIFT); + /* 32 KB */ + auxctl_val |= (2 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT); + auxctl_msk &= ~(L2X0_AUX_CTRL_WAY_SIZE_MASK); + + /* + * Set bit 22 in the auxiliary control register. If this bit + * is cleared, PL310 treats Normal Shared Non-cacheable + * accesses as Cacheable no-allocate. + */ + auxctl_val |= (1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT); + + /* Allow non-secure access */ + auxctl_val |= (1 << L2X0_AUX_CTRL_NS_INT_CTRL_SHIFT); + /* Instruction prefetch */ + auxctl_val |= (1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT); + /* Early BRESP */ + auxctl_val |= (1 << L2X0_AUX_CTRL_EARLY_BRESP_SHIFT); + + l2x0_of_init(auxctl_val, auxctl_msk); +} + +static void __init bcm63xx_init(void) +{ + of_platform_populate(NULL, of_default_bus_match_table, NULL, + &platform_bus); + bcm63xx_l2cc_init(); +} + +static const char * const bcm63xx_dt_compat[] = { + "brcm,bcm63138", + NULL +}; + +static struct map_desc bcm63xx_map_desc[] __initdata = { + /* AHB register space */ + { + .virtual = BCM63XX_AHB_VIRT, + .pfn = __phys_to_pfn(BCM63XX_AHB_PHYS), + .length = BCM63XX_AHB_SIZE, + .type = MT_DEVICE, + }, + /* PERIPH register space */ + { + .virtual = BCM63XX_PERIPH_VIRT, + .pfn = __phys_to_pfn(BCM63XX_PERIPH_PHYS), + .length = BCM63XX_PERIPH_SIZE, + .type = MT_DEVICE, + }, +}; + +static void __init bcm63xx_map_io(void) +{ + iotable_init(bcm63xx_map_desc, ARRAY_SIZE(bcm63xx_map_desc)); +} + +DT_MACHINE_START(BCM63XXX_DT, "BCM63xx DSL SoC") + .map_io = bcm63xx_map_io, + .init_machine = bcm63xx_init, + .dt_compat = bcm63xx_dt_compat, +MACHINE_END -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
