8 files changed, 389 insertions, 96 deletions

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index b1aa6a9b3bd1..49c914cd9c7a 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -16,12 +16,7 @@ config ARCH_BCM_MOBILE
         select ARM_ERRATA_754322
         select ARM_ERRATA_764369 if SMP
         select ARM_GIC
-        select CPU_V7
-        select CLKSRC_OF
-        select GENERIC_CLOCKEVENTS
-        select GENERIC_TIME
         select GPIO_BCM_KONA
-        select SPARSE_IRQ
         select TICK_ONESHOT
         select CACHE_L2X0
         select HAVE_ARM_ARCH_TIMER
@@ -32,6 +27,48 @@ config ARCH_BCM_MOBILE
           BCM11130, BCM11140, BCM11351, BCM28145 and
           BCM28155 variants.
 
+config ARCH_BCM2835
+        bool "Broadcom BCM2835 family" if ARCH_MULTI_V6
+        select ARCH_REQUIRE_GPIOLIB
+        select ARM_AMBA
+        select ARM_ERRATA_411920
+        select ARM_TIMER_SP804
+        select CLKDEV_LOOKUP
+        select CLKSRC_OF
+        select CPU_V6
+        select GENERIC_CLOCKEVENTS
+        select PINCTRL
+        select PINCTRL_BCM2835
+        help
+          This enables support for the Broadcom BCM2835 SoC. This SoC is
+          used in the Raspberry Pi and Roku 2 devices.
+
+config ARCH_BCM_5301X
+        bool "Broadcom BCM470X / BCM5301X ARM SoC" if ARCH_MULTI_V7
+        depends on MMU
+        select ARM_GIC
+        select CACHE_L2X0
+        select HAVE_ARM_SCU if SMP
+        select HAVE_ARM_TWD if SMP
+        select HAVE_SMP
+        select COMMON_CLK
+        select GENERIC_CLOCKEVENTS
+        select ARM_GLOBAL_TIMER
+        select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
+        select MIGHT_HAVE_PCI
+        help
+          Support for Broadcom BCM470X and BCM5301X SoCs with ARM CPU cores.
+
+          This is a network SoC line mostly used in home routers and
+          wifi access points, it's internal name is Northstar.
+          This inclused the following SoC: BCM53010, BCM53011, BCM53012,
+          BCM53014, BCM53015, BCM53016, BCM53017, BCM53018, BCM4707,
+          BCM4708 and BCM4709.
+
+          Do not confuse this with the BCM4760 which is a totally
+          different SoC or with the older BCM47XX and BCM53XX based
+          network SoC using a MIPS CPU, they are supported by arch/mips/bcm47xx
+
 endmenu
 
 endif
diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
index c2ccd5a0f772..a326b28c4406 100644
--- a/arch/arm/mach-bcm/Makefile
+++ b/arch/arm/mach-bcm/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2012-2013 Broadcom Corporation
+# Copyright (C) 2012-2014 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
@@ -10,6 +10,10 @@
 # of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 
-obj-$(CONFIG_ARCH_BCM_MOBILE)   := board_bcm281xx.o bcm_kona_smc.o bcm_kona_smc_asm.o kona.o
+obj-$(CONFIG_ARCH_BCM_MOBILE)   := board_bcm281xx.o board_bcm21664.o \
+                                bcm_kona_smc.o bcm_kona_smc_asm.o kona.o
+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
diff --git a/arch/arm/mach-bcm/bcm_5301x.c b/arch/arm/mach-bcm/bcm_5301x.c
new file mode 100644
index 000000000000..edff69761e04
--- /dev/null
+++ b/arch/arm/mach-bcm/bcm_5301x.c
@@ -0,0 +1,61 @@
+/*
+ * Broadcom BCM470X / BCM5301X ARM platform code.
+ *
+ * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+#include <linux/of_platform.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#include <asm/mach/arch.h>
+#include <asm/siginfo.h>
+#include <asm/signal.h>
+
+
+static bool first_fault = true;
+
+static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
+                                 struct pt_regs *regs)
+{
+        if (fsr == 0x1c06 && first_fault) {
+                first_fault = false;
+
+                /*
+                 * These faults with code 0x1c06 happens for no good reason,
+                 * possibly left over from the CFE boot loader.
+                 */
+                pr_warn("External imprecise Data abort at addr=%#lx, fsr=%#x ignored.\n",
+                addr, fsr);
+
+                /* Returning non-zero causes fault display and panic */
+                return 0;
+        }
+
+        /* Others should cause a fault */
+        return 1;
+}
+
+static void __init bcm5301x_init_early(void)
+{
+        /* Install our hook */
+        hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
+                        "imprecise external abort");
+}
+
+static void __init bcm5301x_dt_init(void)
+{
+        l2x0_of_init(0, ~0UL);
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char __initconst *bcm5301x_dt_compat[] = {
+        "brcm,bcm4708",
+        NULL,
+};
+
+DT_MACHINE_START(BCM5301X, "BCM5301X")
+        .init_early     = bcm5301x_init_early,
+        .init_machine   = bcm5301x_dt_init,
+        .dt_compat      = bcm5301x_dt_compat,
+MACHINE_END
diff --git a/arch/arm/mach-bcm/board_bcm21664.c b/arch/arm/mach-bcm/board_bcm21664.c
new file mode 100644
index 000000000000..acc1573fd005
--- /dev/null
+++ b/arch/arm/mach-bcm/board_bcm21664.c
@@ -0,0 +1,78 @@
+/*
+ * 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/clocksource.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+
+#include "bcm_kona_smc.h"
+#include "kona.h"
+
+#define RSTMGR_DT_STRING                "brcm,bcm21664-resetmgr"
+
+#define RSTMGR_REG_WR_ACCESS_OFFSET     0
+#define RSTMGR_REG_CHIP_SOFT_RST_OFFSET 4
+
+#define RSTMGR_WR_PASSWORD              0xa5a5
+#define RSTMGR_WR_PASSWORD_SHIFT        8
+#define RSTMGR_WR_ACCESS_ENABLE         1
+
+static void bcm21664_restart(enum reboot_mode mode, const char *cmd)
+{
+        void __iomem *base;
+        struct device_node *resetmgr;
+
+        resetmgr = of_find_compatible_node(NULL, NULL, RSTMGR_DT_STRING);
+        if (!resetmgr) {
+                pr_emerg("Couldn't find " RSTMGR_DT_STRING "\n");
+                return;
+        }
+        base = of_iomap(resetmgr, 0);
+        if (!base) {
+                pr_emerg("Couldn't map " RSTMGR_DT_STRING "\n");
+                return;
+        }
+
+        /*
+         * A soft reset is triggered by writing a 0 to bit 0 of the soft reset
+         * register. To write to that register we must first write the password
+         * and the enable bit in the write access enable register.
+         */
+        writel((RSTMGR_WR_PASSWORD << RSTMGR_WR_PASSWORD_SHIFT) |
+                RSTMGR_WR_ACCESS_ENABLE,
+                base + RSTMGR_REG_WR_ACCESS_OFFSET);
+        writel(0, base + RSTMGR_REG_CHIP_SOFT_RST_OFFSET);
+
+        /* Wait for reset */
+        while (1);
+}
+
+static void __init bcm21664_init(void)
+{
+        of_platform_populate(NULL, of_default_bus_match_table, NULL,
+                &platform_bus);
+        kona_l2_cache_init();
+}
+
+static const char * const bcm21664_dt_compat[] = {
+        "brcm,bcm21664",
+        NULL,
+};
+
+DT_MACHINE_START(BCM21664_DT, "BCM21664 Broadcom Application Processor")
+        .init_machine = bcm21664_init,
+        .restart = bcm21664_restart,
+        .dt_compat = bcm21664_dt_compat,
+MACHINE_END
diff --git a/arch/arm/mach-bcm/board_bcm281xx.c b/arch/arm/mach-bcm/board_bcm281xx.c
index cb3dc364405c..6be54c10f8cb 100644
--- a/arch/arm/mach-bcm/board_bcm281xx.c
+++ b/arch/arm/mach-bcm/board_bcm281xx.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012-2013 Broadcom Corporation
+ * Copyright (C) 2012-2014 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
@@ -11,64 +11,65 @@
  * 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/of_address.h>
+#include <linux/of_platform.h>
 
 #include <asm/mach/arch.h>
-#include <asm/mach/time.h>
-#include <asm/hardware/cache-l2x0.h>
 
-#include "bcm_kona_smc.h"
 #include "kona.h"
 
-static int __init kona_l2_cache_init(void)
+#define SECWDOG_OFFSET                  0x00000000
+#define SECWDOG_RESERVED_MASK           0xe2000000
+#define SECWDOG_WD_LOAD_FLAG_MASK       0x10000000
+#define SECWDOG_EN_MASK                 0x08000000
+#define SECWDOG_SRSTEN_MASK             0x04000000
+#define SECWDOG_CLKS_SHIFT              20
+#define SECWDOG_COUNT_SHIFT             0
+
+static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
 {
-        if (!IS_ENABLED(CONFIG_CACHE_L2X0))
-                return 0;
+        uint32_t val;
+        void __iomem *base;
+        struct device_node *np_wdog;
 
-        if (bcm_kona_smc_init() < 0) {
-                pr_info("Kona secure API not available. Skipping L2 init\n");
-                return 0;
+        np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
+        if (!np_wdog) {
+                pr_emerg("Couldn't find brcm,kona-wdt\n");
+                return;
+        }
+        base = of_iomap(np_wdog, 0);
+        if (!base) {
+                pr_emerg("Couldn't map brcm,kona-wdt\n");
+                return;
         }
 
-        bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
-
-        /*
-         * The aux_val and aux_mask have no effect since L2 cache is already
-         * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.
-         */
-        return l2x0_of_init(0, ~0);
-}
-
-static void bcm_board_setup_restart(void)
-{
-        struct device_node *np;
+        /* Enable watchdog with short timeout (244us). */
+        val = readl(base + SECWDOG_OFFSET);
+        val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
+        val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
+                (0x15 << SECWDOG_CLKS_SHIFT) |
+                (0x8 << SECWDOG_COUNT_SHIFT);
+        writel(val, base + SECWDOG_OFFSET);
 
-        np = of_find_compatible_node(NULL, NULL, "brcm,bcm11351");
-        if (np) {
-                if (of_device_is_available(np))
-                        bcm_kona_setup_restart();
-                of_node_put(np);
-        }
-        /* Restart setup for other boards goes here */
+        /* Wait for reset */
+        while (1);
 }
 
-static void __init board_init(void)
+static void __init bcm281xx_init(void)
 {
         of_platform_populate(NULL, of_default_bus_match_table, NULL,
                 &platform_bus);
-
-        bcm_board_setup_restart();
         kona_l2_cache_init();
 }
 
-static const char * const bcm11351_dt_compat[] = { "brcm,bcm11351", NULL, };
+static const char * const bcm281xx_dt_compat[] = {
+        "brcm,bcm11351",        /* Have to use the first number upstreamed */
+        NULL,
+};
 
-DT_MACHINE_START(BCM11351_DT, "BCM281xx Broadcom Application Processor")
-        .init_machine = board_init,
-        .restart = bcm_kona_restart,
-        .dt_compat = bcm11351_dt_compat,
+DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor")
+        .init_machine = bcm281xx_init,
+        .restart = bcm281xx_restart,
+        .dt_compat = bcm281xx_dt_compat,
 MACHINE_END
diff --git a/arch/arm/mach-bcm/board_bcm2835.c b/arch/arm/mach-bcm/board_bcm2835.c
new file mode 100644
index 000000000000..70f2f3925f0e
--- /dev/null
+++ b/arch/arm/mach-bcm/board_bcm2835.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2010 Broadcom
+ *
+ * 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.
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/clk/bcm2835.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#define PM_RSTC                         0x1c
+#define PM_RSTS                         0x20
+#define PM_WDOG                         0x24
+
+#define PM_PASSWORD                     0x5a000000
+#define PM_RSTC_WRCFG_MASK              0x00000030
+#define PM_RSTC_WRCFG_FULL_RESET        0x00000020
+#define PM_RSTS_HADWRH_SET              0x00000040
+
+#define BCM2835_PERIPH_PHYS     0x20000000
+#define BCM2835_PERIPH_VIRT     0xf0000000
+#define BCM2835_PERIPH_SIZE     SZ_16M
+
+static void __iomem *wdt_regs;
+
+/*
+ * The machine restart method can be called from an atomic context so we won't
+ * be able to ioremap the regs then.
+ */
+static void bcm2835_setup_restart(void)
+{
+        struct device_node *np = of_find_compatible_node(NULL, NULL,
+                                                "brcm,bcm2835-pm-wdt");
+        if (WARN(!np, "unable to setup watchdog restart"))
+                return;
+
+        wdt_regs = of_iomap(np, 0);
+        WARN(!wdt_regs, "failed to remap watchdog regs");
+}
+
+static void bcm2835_restart(enum reboot_mode mode, const char *cmd)
+{
+        u32 val;
+
+        if (!wdt_regs)
+                return;
+
+        /* use a timeout of 10 ticks (~150us) */
+        writel_relaxed(10 | PM_PASSWORD, wdt_regs + PM_WDOG);
+        val = readl_relaxed(wdt_regs + PM_RSTC);
+        val &= ~PM_RSTC_WRCFG_MASK;
+        val |= PM_PASSWORD | PM_RSTC_WRCFG_FULL_RESET;
+        writel_relaxed(val, wdt_regs + PM_RSTC);
+
+        /* No sleeping, possibly atomic. */
+        mdelay(1);
+}
+
+/*
+ * We can't really power off, but if we do the normal reset scheme, and
+ * indicate to bootcode.bin not to reboot, then most of the chip will be
+ * powered off.
+ */
+static void bcm2835_power_off(void)
+{
+        u32 val;
+
+        /*
+         * We set the watchdog hard reset bit here to distinguish this reset
+         * from the normal (full) reset. bootcode.bin will not reboot after a
+         * hard reset.
+         */
+        val = readl_relaxed(wdt_regs + PM_RSTS);
+        val &= ~PM_RSTC_WRCFG_MASK;
+        val |= PM_PASSWORD | PM_RSTS_HADWRH_SET;
+        writel_relaxed(val, wdt_regs + PM_RSTS);
+
+        /* Continue with normal reset mechanism */
+        bcm2835_restart(REBOOT_HARD, "");
+}
+
+static struct map_desc io_map __initdata = {
+        .virtual = BCM2835_PERIPH_VIRT,
+        .pfn = __phys_to_pfn(BCM2835_PERIPH_PHYS),
+        .length = BCM2835_PERIPH_SIZE,
+        .type = MT_DEVICE
+};
+
+static void __init bcm2835_map_io(void)
+{
+        iotable_init(&io_map, 1);
+}
+
+static void __init bcm2835_init(void)
+{
+        int ret;
+
+        bcm2835_setup_restart();
+        if (wdt_regs)
+                pm_power_off = bcm2835_power_off;
+
+        bcm2835_init_clocks();
+
+        ret = of_platform_populate(NULL, of_default_bus_match_table, NULL,
+                                   NULL);
+        if (ret) {
+                pr_err("of_platform_populate failed: %d\n", ret);
+                BUG();
+        }
+}
+
+static const char * const bcm2835_compat[] = {
+        "brcm,bcm2835",
+        NULL
+};
+
+DT_MACHINE_START(BCM2835, "BCM2835")
+        .map_io = bcm2835_map_io,
+        .init_irq = irqchip_init,
+        .init_machine = bcm2835_init,
+        .restart = bcm2835_restart,
+        .dt_compat = bcm2835_compat
+MACHINE_END
diff --git a/arch/arm/mach-bcm/kona.c b/arch/arm/mach-bcm/kona.c
index 6939d9017f63..768bc2837bf5 100644
--- a/arch/arm/mach-bcm/kona.c
+++ b/arch/arm/mach-bcm/kona.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Broadcom Corporation
+ * Copyright (C) 2012-2014 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
@@ -11,55 +11,33 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/of_address.h>
-#include <asm/io.h>
+#include <linux/of_platform.h>
+#include <asm/hardware/cache-l2x0.h>
 
+#include "bcm_kona_smc.h"
 #include "kona.h"
 
-static void __iomem *watchdog_base;
-
-void bcm_kona_setup_restart(void)
+void __init kona_l2_cache_init(void)
 {
-        struct device_node *np_wdog;
+        int ret;
 
-        /*
-         * The assumption is that whoever calls bcm_kona_setup_restart()
-         * also needs a Kona Watchdog Timer entry in Device Tree, i.e. we
-         * report an error if the DT entry is missing.
-         */
-        np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
-        if (!np_wdog) {
-                pr_err("brcm,kona-wdt not found in DT, reboot disabled\n");
+        if (!IS_ENABLED(CONFIG_CACHE_L2X0))
                 return;
-        }
-        watchdog_base = of_iomap(np_wdog, 0);
-        WARN(!watchdog_base, "failed to map watchdog base");
-        of_node_put(np_wdog);
-}
-
-#define SECWDOG_OFFSET                  0x00000000
-#define SECWDOG_RESERVED_MASK           0xE2000000
-#define SECWDOG_WD_LOAD_FLAG_MASK       0x10000000
-#define SECWDOG_EN_MASK                 0x08000000
-#define SECWDOG_SRSTEN_MASK             0x04000000
-#define SECWDOG_CLKS_SHIFT              20
-#define SECWDOG_LOCK_SHIFT              0
 
-void bcm_kona_restart(enum reboot_mode mode, const char *cmd)
-{
-        uint32_t val;
-
-        if (!watchdog_base)
-                panic("Watchdog not mapped. Reboot failed.\n");
+        ret = bcm_kona_smc_init();
+        if (ret) {
+                pr_info("Secure API not available (%d). Skipping L2 init.\n",
+                        ret);
+                return;
+        }
 
-        /* Enable watchdog2 with very short timeout. */
-        val = readl(watchdog_base + SECWDOG_OFFSET);
-        val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
-        val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
-                (0x8 << SECWDOG_CLKS_SHIFT) |
-                (0x8 << SECWDOG_LOCK_SHIFT);
-        writel(val, watchdog_base + SECWDOG_OFFSET);
+        bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
 
-        while (1)
-                ;
+        /*
+         * The aux_val and aux_mask have no effect since L2 cache is already
+         * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.
+         */
+        ret = l2x0_of_init(0, ~0);
+        if (ret)
+                pr_err("Couldn't enable L2 cache: %d\n", ret);
 }
diff --git a/arch/arm/mach-bcm/kona.h b/arch/arm/mach-bcm/kona.h
index 291eca3e06ff..3a7a017c29cd 100644
--- a/arch/arm/mach-bcm/kona.h
+++ b/arch/arm/mach-bcm/kona.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Broadcom Corporation
+ * Copyright (C) 2012-2014 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
@@ -11,7 +11,4 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/reboot.h>
-
-void bcm_kona_setup_restart(void);
-void bcm_kona_restart(enum reboot_mode mode, const char *cmd);
+void __init kona_l2_cache_init(void);