1 files changed, 196 insertions, 0 deletions

diff --git a/arch/arm/mach-vt8500/vt8500.c b/arch/arm/mach-vt8500/vt8500.c
new file mode 100644
index 000000000000..449499354449
--- /dev/null
+++ b/arch/arm/mach-vt8500/vt8500.c
@@ -0,0 +1,196 @@
+/*
+ *  arch/arm/mach-vt8500/vt8500.c
+ *
+ *  Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/io.h>
+#include <linux/pm.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/mach/map.h>
+
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#include <mach/restart.h>
+#include <mach/gpio.h>
+
+#include "common.h"
+
+#define LEGACY_GPIO_BASE        0xD8110000
+#define LEGACY_PMC_BASE         0xD8130000
+
+/* Registers in GPIO Controller */
+#define VT8500_GPIO_MUX_REG     0x200
+
+/* Registers in Power Management Controller */
+#define VT8500_HCR_REG          0x12
+#define VT8500_PMSR_REG         0x60
+
+static void __iomem *pmc_base;
+
+void vt8500_restart(char mode, const char *cmd)
+{
+        if (pmc_base)
+                writel(1, pmc_base + VT8500_PMSR_REG);
+}
+
+static struct map_desc vt8500_io_desc[] __initdata = {
+        /* SoC MMIO registers */
+        [0] = {
+                .virtual        = 0xf8000000,
+                .pfn            = __phys_to_pfn(0xd8000000),
+                .length         = 0x00390000, /* max of all chip variants */
+                .type           = MT_DEVICE
+        },
+};
+
+void __init vt8500_map_io(void)
+{
+        iotable_init(vt8500_io_desc, ARRAY_SIZE(vt8500_io_desc));
+}
+
+static void vt8500_power_off(void)
+{
+        local_irq_disable();
+        writew(5, pmc_base + VT8500_HCR_REG);
+        asm("mcr%? p15, 0, %0, c7, c0, 4" : : "r" (0));
+}
+
+void __init vt8500_init(void)
+{
+        struct device_node *np, *fb;
+        void __iomem *gpio_base;
+
+#ifdef CONFIG_FB_VT8500
+        fb = of_find_compatible_node(NULL, NULL, "via,vt8500-fb");
+        if (fb) {
+                np = of_find_compatible_node(NULL, NULL, "via,vt8500-gpio");
+                if (np) {
+                        gpio_base = of_iomap(np, 0);
+
+                        if (!gpio_base)
+                                pr_err("%s: of_iomap(gpio_mux) failed\n",
+                                                                __func__);
+
+                        of_node_put(np);
+                } else {
+                        gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
+                        if (!gpio_base)
+                                pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
+                                                                __func__);
+                }
+                if (gpio_base) {
+                        writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | 1,
+                                gpio_base + VT8500_GPIO_MUX_REG);
+                        iounmap(gpio_base);
+                } else
+                        pr_err("%s: Could not remap GPIO mux\n", __func__);
+
+                of_node_put(fb);
+        }
+#endif
+
+#ifdef CONFIG_FB_WM8505
+        fb = of_find_compatible_node(NULL, NULL, "wm,wm8505-fb");
+        if (fb) {
+                np = of_find_compatible_node(NULL, NULL, "wm,wm8505-gpio");
+                if (!np)
+                        np = of_find_compatible_node(NULL, NULL,
+                                                        "wm,wm8650-gpio");
+                if (np) {
+                        gpio_base = of_iomap(np, 0);
+
+                        if (!gpio_base)
+                                pr_err("%s: of_iomap(gpio_mux) failed\n",
+                                                                __func__);
+
+                        of_node_put(np);
+                } else {
+                        gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
+                        if (!gpio_base)
+                                pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
+                                                                __func__);
+                }
+                if (gpio_base) {
+                        writel(readl(gpio_base + VT8500_GPIO_MUX_REG) |
+                                0x80000000, gpio_base + VT8500_GPIO_MUX_REG);
+                        iounmap(gpio_base);
+                } else
+                        pr_err("%s: Could not remap GPIO mux\n", __func__);
+
+                of_node_put(fb);
+        }
+#endif
+
+        np = of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");
+        if (np) {
+                pmc_base = of_iomap(np, 0);
+
+                if (!pmc_base)
+                        pr_err("%s:of_iomap(pmc) failed\n", __func__);
+
+                of_node_put(np);
+        } else {
+                pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
+                if (!pmc_base)
+                        pr_err("%s:ioremap(power_off) failed\n", __func__);
+        }
+        if (pmc_base)
+                pm_power_off = &vt8500_power_off;
+        else
+                pr_err("%s: PMC Hibernation register could not be remapped, not enabling power off!\n", __func__);
+
+        vtwm_clk_init(pmc_base);
+
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const struct of_device_id vt8500_irq_match[] __initconst = {
+        { .compatible = "via,vt8500-intc", .data = vt8500_irq_init, },
+        { /* sentinel */ },
+};
+
+static void __init vt8500_init_irq(void)
+{
+        of_irq_init(vt8500_irq_match);
+};
+
+static struct sys_timer vt8500_timer = {
+        .init = vt8500_timer_init,
+};
+
+static const char * const vt8500_dt_compat[] = {
+        "via,vt8500",
+        "wm,wm8650",
+        "wm,wm8505",
+};
+
+DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")
+        .dt_compat      = vt8500_dt_compat,
+        .map_io         = vt8500_map_io,
+        .init_irq       = vt8500_init_irq,
+        .timer          = &vt8500_timer,
+        .init_machine   = vt8500_init,
+        .restart        = vt8500_restart,
+MACHINE_END
+