ARM: 6597/1: Add basic architecture support for VIA/WonderMedia 85xx SoC's

This adds support for the family of Systems-on-Chip produced initially
by VIA and now its subsidiary WonderMedia that have recently become
widespread in lower-end Chinese ARM-based tablets and netbooks.

Support is included for both VT8500 and WM8505, selectable by a
configuration switch at kernel build time.

Included are basic machine initialization files, register and
interrupt definitions, support for the on-chip interrupt controller,
high-precision OS timer, GPIO lines, necessary macros for early debug,
pulse-width-modulated outputs control, as well as platform device
configurations for the specific drivers implemented elsewhere.

Signed-off-by: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 77 insertions, 0 deletions

diff --git a/arch/arm/mach-vt8500/bv07.c b/arch/arm/mach-vt8500/bv07.c
new file mode 100644
index 000000000000..94a261d86bf0
--- /dev/null
+++ b/arch/arm/mach-vt8500/bv07.c
@@ -0,0 +1,77 @@
+/*
+ *  arch/arm/mach-vt8500/bv07.c
+ *
+ *  Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
+ *
+ * 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 "devices.h"
+
+static void __iomem *pmc_hiber;
+
+static struct platform_device *devices[] __initdata = {
+        &vt8500_device_uart0,
+        &vt8500_device_lcdc,
+        &vt8500_device_ehci,
+        &vt8500_device_ge_rops,
+        &vt8500_device_pwm,
+        &vt8500_device_pwmbl,
+        &vt8500_device_rtc,
+};
+
+static void vt8500_power_off(void)
+{
+        local_irq_disable();
+        writew(5, pmc_hiber);
+        asm("mcr%? p15, 0, %0, c7, c0, 4" : : "r" (0));
+}
+
+void __init bv07_init(void)
+{
+#ifdef CONFIG_FB_VT8500
+        void __iomem *gpio_mux_reg = ioremap(wmt_gpio_base + 0x200, 4);
+        if (gpio_mux_reg) {
+                writel(readl(gpio_mux_reg) | 1, gpio_mux_reg);
+                iounmap(gpio_mux_reg);
+        } else {
+                printk(KERN_ERR "Could not remap the GPIO mux register, display may not work properly!\n");
+        }
+#endif
+        pmc_hiber = ioremap(wmt_pmc_base + 0x12, 2);
+        if (pmc_hiber)
+                pm_power_off = &vt8500_power_off;
+        else
+                printk(KERN_ERR "PMC Hibernation register could not be remapped, not enabling power off!\n");
+
+        vt8500_set_resources();
+        platform_add_devices(devices, ARRAY_SIZE(devices));
+        vt8500_gpio_init();
+}
+
+MACHINE_START(BV07, "Benign BV07 Mini Netbook")
+        .boot_params    = 0x00000100,
+        .reserve        = vt8500_reserve_mem,
+        .map_io         = vt8500_map_io,
+        .init_irq       = vt8500_init_irq,
+        .timer          = &vt8500_timer,
+        .init_machine   = bv07_init,
+MACHINE_END