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, 99 insertions, 0 deletions

diff --git a/arch/arm/mach-vt8500/devices-wm8505.c b/arch/arm/mach-vt8500/devices-wm8505.c
new file mode 100644
index 000000000000..db4594e029f4
--- /dev/null
+++ b/arch/arm/mach-vt8500/devices-wm8505.c
@@ -0,0 +1,99 @@
+/* linux/arch/arm/mach-vt8500/devices-wm8505.c
+ *
+ * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/platform_device.h>
+
+#include <mach/wm8505_regs.h>
+#include <mach/wm8505_irqs.h>
+#include <mach/i8042.h>
+#include "devices.h"
+
+void __init wm8505_set_resources(void)
+{
+        struct resource tmp[3];
+
+        tmp[0] = wmt_mmio_res(WM8505_GOVR_BASE, SZ_512);
+        wmt_res_add(&vt8500_device_wm8505_fb, tmp, 1);
+
+        tmp[0] = wmt_mmio_res(WM8505_UART0_BASE, 0x1040);
+        tmp[1] = wmt_irq_res(IRQ_UART0);
+        wmt_res_add(&vt8500_device_uart0, tmp, 2);
+
+        tmp[0] = wmt_mmio_res(WM8505_UART1_BASE, 0x1040);
+        tmp[1] = wmt_irq_res(IRQ_UART1);
+        wmt_res_add(&vt8500_device_uart1, tmp, 2);
+
+        tmp[0] = wmt_mmio_res(WM8505_UART2_BASE, 0x1040);
+        tmp[1] = wmt_irq_res(IRQ_UART2);
+        wmt_res_add(&vt8500_device_uart2, tmp, 2);
+
+        tmp[0] = wmt_mmio_res(WM8505_UART3_BASE, 0x1040);
+        tmp[1] = wmt_irq_res(IRQ_UART3);
+        wmt_res_add(&vt8500_device_uart3, tmp, 2);
+
+        tmp[0] = wmt_mmio_res(WM8505_UART4_BASE, 0x1040);
+        tmp[1] = wmt_irq_res(IRQ_UART4);
+        wmt_res_add(&vt8500_device_uart4, tmp, 2);
+
+        tmp[0] = wmt_mmio_res(WM8505_UART5_BASE, 0x1040);
+        tmp[1] = wmt_irq_res(IRQ_UART5);
+        wmt_res_add(&vt8500_device_uart5, tmp, 2);
+
+        tmp[0] = wmt_mmio_res(WM8505_EHCI_BASE, SZ_512);
+        tmp[1] = wmt_irq_res(IRQ_EHCI);
+        wmt_res_add(&vt8500_device_ehci, tmp, 2);
+
+        tmp[0] = wmt_mmio_res(WM8505_GEGEA_BASE, SZ_256);
+        wmt_res_add(&vt8500_device_ge_rops, tmp, 1);
+
+        tmp[0] = wmt_mmio_res(WM8505_PWM_BASE, 0x44);
+        wmt_res_add(&vt8500_device_pwm, tmp, 1);
+
+        tmp[0] = wmt_mmio_res(WM8505_RTC_BASE, 0x2c);
+        tmp[1] = wmt_irq_res(IRQ_RTC);
+        tmp[2] = wmt_irq_res(IRQ_RTCSM);
+        wmt_res_add(&vt8500_device_rtc, tmp, 3);
+}
+
+static void __init wm8505_set_externs(void)
+{
+        /* Non-resource-aware stuff */
+        wmt_ic_base = WM8505_IC_BASE;
+        wmt_sic_base = WM8505_SIC_BASE;
+        wmt_gpio_base = WM8505_GPIO_BASE;
+        wmt_pmc_base = WM8505_PMC_BASE;
+        wmt_i8042_base = WM8505_PS2_BASE;
+
+        wmt_nr_irqs = WM8505_NR_IRQS;
+        wmt_timer_irq = IRQ_PMCOS0;
+        wmt_gpio_ext_irq[0] = IRQ_EXT0;
+        wmt_gpio_ext_irq[1] = IRQ_EXT1;
+        wmt_gpio_ext_irq[2] = IRQ_EXT2;
+        wmt_gpio_ext_irq[3] = IRQ_EXT3;
+        wmt_gpio_ext_irq[4] = IRQ_EXT4;
+        wmt_gpio_ext_irq[5] = IRQ_EXT5;
+        wmt_gpio_ext_irq[6] = IRQ_EXT6;
+        wmt_gpio_ext_irq[7] = IRQ_EXT7;
+        wmt_i8042_kbd_irq = IRQ_PS2KBD;
+        wmt_i8042_aux_irq = IRQ_PS2MOUSE;
+}
+
+void __init wm8505_map_io(void)
+{
+        iotable_init(wmt_io_desc, ARRAY_SIZE(wmt_io_desc));
+
+        /* Should be done before interrupts and timers are initialized */
+        wm8505_set_externs();
+}