diff options
Diffstat (limited to 'arch/arm/mach-mvebu/board-v7.c')
| -rw-r--r-- | arch/arm/mach-mvebu/board-v7.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c new file mode 100644 index 000000000000..8bb742fdf5ca --- /dev/null +++ b/arch/arm/mach-mvebu/board-v7.c @@ -0,0 +1,219 @@ +/* + * Device Tree support for Armada 370 and XP platforms. + * + * Copyright (C) 2012 Marvell + * + * Lior Amsalem <alior@marvell.com> + * Gregory CLEMENT <gregory.clement@free-electrons.com> + * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/clk-provider.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/io.h> +#include <linux/clocksource.h> +#include <linux/dma-mapping.h> +#include <linux/mbus.h> +#include <linux/signal.h> +#include <linux/slab.h> +#include <asm/hardware/cache-l2x0.h> +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <asm/mach/time.h> +#include <asm/smp_scu.h> +#include "armada-370-xp.h" +#include "common.h" +#include "coherency.h" +#include "mvebu-soc-id.h" + +/* + * Enables the SCU when available. Obviously, this is only useful on + * Cortex-A based SOCs, not on PJ4B based ones. + */ +static void __init mvebu_scu_enable(void) +{ + void __iomem *scu_base; + + struct device_node *np = + of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu"); + if (np) { + scu_base = of_iomap(np, 0); + scu_enable(scu_base); + of_node_put(np); + } +} + +/* + * Early versions of Armada 375 SoC have a bug where the BootROM + * leaves an external data abort pending. The kernel is hit by this + * data abort as soon as it enters userspace, because it unmasks the + * data aborts at this moment. We register a custom abort handler + * below to ignore the first data abort to work around this + * problem. + */ +static int armada_375_external_abort_wa(unsigned long addr, unsigned int fsr, + struct pt_regs *regs) +{ + static int ignore_first; + + if (!ignore_first && fsr == 0x1406) { + ignore_first = 1; + return 0; + } + + return 1; +} + +static void __init mvebu_timer_and_clk_init(void) +{ + of_clk_init(NULL); + clocksource_of_init(); + mvebu_scu_enable(); + coherency_init(); + BUG_ON(mvebu_mbus_dt_init(coherency_available())); + + if (of_machine_is_compatible("marvell,armada375")) + hook_fault_code(16 + 6, armada_375_external_abort_wa, SIGBUS, 0, + "imprecise external abort"); +} + +static void __init i2c_quirk(void) +{ + struct device_node *np; + u32 dev, rev; + + /* + * Only revisons more recent than A0 support the offload + * mechanism. We can exit only if we are sure that we can + * get the SoC revision and it is more recent than A0. + */ + if (mvebu_get_soc_id(&dev, &rev) == 0 && rev > MV78XX0_A0_REV) + return; + + for_each_compatible_node(np, NULL, "marvell,mv78230-i2c") { + struct property *new_compat; + + new_compat = kzalloc(sizeof(*new_compat), GFP_KERNEL); + + new_compat->name = kstrdup("compatible", GFP_KERNEL); + new_compat->length = sizeof("marvell,mv78230-a0-i2c"); + new_compat->value = kstrdup("marvell,mv78230-a0-i2c", + GFP_KERNEL); + + of_update_property(np, new_compat); + } + return; +} + +#define A375_Z1_THERMAL_FIXUP_OFFSET 0xc + +static void __init thermal_quirk(void) +{ + struct device_node *np; + u32 dev, rev; + + if (mvebu_get_soc_id(&dev, &rev) == 0 && rev > ARMADA_375_Z1_REV) + return; + + for_each_compatible_node(np, NULL, "marvell,armada375-thermal") { + struct property *prop; + __be32 newval, *newprop, *oldprop; + int len; + + /* + * The register offset is at a wrong location. This quirk + * creates a new reg property as a clone of the previous + * one and corrects the offset. + */ + oldprop = (__be32 *)of_get_property(np, "reg", &len); + if (!oldprop) + continue; + + /* Create a duplicate of the 'reg' property */ + prop = kzalloc(sizeof(*prop), GFP_KERNEL); + prop->length = len; + prop->name = kstrdup("reg", GFP_KERNEL); + prop->value = kzalloc(len, GFP_KERNEL); + memcpy(prop->value, oldprop, len); + + /* Fixup the register offset of the second entry */ + oldprop += 2; + newprop = (__be32 *)prop->value + 2; + newval = cpu_to_be32(be32_to_cpu(*oldprop) - + A375_Z1_THERMAL_FIXUP_OFFSET); + *newprop = newval; + of_update_property(np, prop); + + /* + * The thermal controller needs some quirk too, so let's change + * the compatible string to reflect this. + */ + prop = kzalloc(sizeof(*prop), GFP_KERNEL); + prop->name = kstrdup("compatible", GFP_KERNEL); + prop->length = sizeof("marvell,armada375-z1-thermal"); + prop->value = kstrdup("marvell,armada375-z1-thermal", + GFP_KERNEL); + of_update_property(np, prop); + } + return; +} + +static void __init mvebu_dt_init(void) +{ + if (of_machine_is_compatible("plathome,openblocks-ax3-4")) + i2c_quirk(); + if (of_machine_is_compatible("marvell,a375-db")) + thermal_quirk(); + + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); +} + +static const char * const armada_370_xp_dt_compat[] = { + "marvell,armada-370-xp", + NULL, +}; + +DT_MACHINE_START(ARMADA_370_XP_DT, "Marvell Armada 370/XP (Device Tree)") + .l2c_aux_val = 0, + .l2c_aux_mask = ~0, + .smp = smp_ops(armada_xp_smp_ops), + .init_machine = mvebu_dt_init, + .init_time = mvebu_timer_and_clk_init, + .restart = mvebu_restart, + .dt_compat = armada_370_xp_dt_compat, +MACHINE_END + +static const char * const armada_375_dt_compat[] = { + "marvell,armada375", + NULL, +}; + +DT_MACHINE_START(ARMADA_375_DT, "Marvell Armada 375 (Device Tree)") + .l2c_aux_val = 0, + .l2c_aux_mask = ~0, + .init_time = mvebu_timer_and_clk_init, + .init_machine = mvebu_dt_init, + .restart = mvebu_restart, + .dt_compat = armada_375_dt_compat, +MACHINE_END + +static const char * const armada_38x_dt_compat[] = { + "marvell,armada380", + "marvell,armada385", + NULL, +}; + +DT_MACHINE_START(ARMADA_38X_DT, "Marvell Armada 380/385 (Device Tree)") + .l2c_aux_val = 0, + .l2c_aux_mask = ~0, + .init_time = mvebu_timer_and_clk_init, + .restart = mvebu_restart, + .dt_compat = armada_38x_dt_compat, +MACHINE_END |