[ARM] 5338/1: Add Nuvoton W90P910 Platform support

Add Nuvoton W90X900 ARM9 plat support to linux arm tree,
Now, this patch include only W90P910 EVB of W90P910 CPU,
Its driver is nothing.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 134 insertions, 0 deletions

diff --git a/arch/arm/mach-w90x900/w90p910.c b/arch/arm/mach-w90x900/w90p910.c
new file mode 100644
index 000000000000..aa783bc94310
--- /dev/null
+++ b/arch/arm/mach-w90x900/w90p910.c
@@ -0,0 +1,134 @@
+/*
+ * linux/arch/arm/mach-w90x900/w90p910.c
+ *
+ * Based on linux/arch/arm/plat-s3c24xx/s3c244x.c by Ben Dooks
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * W90P910 cpu support
+ *
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+#include <asm/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-serial.h>
+
+#include "cpu.h"
+
+/*W90P910 has five uarts*/
+
+#define MAX_UART_COUNT 5
+static int uart_count;
+static struct platform_device *uart_devs[MAX_UART_COUNT-1];
+
+/* Initial IO mappings */
+
+static struct map_desc w90p910_iodesc[] __initdata = {
+        IODESC_ENT(IRQ),
+        IODESC_ENT(GCR),
+        IODESC_ENT(UART),
+        IODESC_ENT(TIMER),
+        IODESC_ENT(EBI),
+        /*IODESC_ENT(LCD),*/
+};
+
+/*Init the dev resource*/
+
+static W90X900_RES(UART0);
+static W90X900_RES(UART1);
+static W90X900_RES(UART2);
+static W90X900_RES(UART3);
+static W90X900_RES(UART4);
+static W90X900_DEVICE(uart0, UART0, 0, "w90x900-uart");
+static W90X900_DEVICE(uart1, UART1, 1, "w90x900-uart");
+static W90X900_DEVICE(uart2, UART2, 2, "w90x900-uart");
+static W90X900_DEVICE(uart3, UART3, 3, "w90x900-uart");
+static W90X900_DEVICE(uart4, UART4, 4, "w90x900-uart");
+
+static struct platform_device *uart_devices[] __initdata = {
+        &w90x900_uart0,
+        &w90x900_uart1,
+        &w90x900_uart2,
+        &w90x900_uart3,
+        &w90x900_uart4
+};
+
+/*Init W90P910 uart device*/
+
+void __init w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no)
+{
+        struct platform_device *platdev;
+        int uart, uartdev;
+
+        /*By min() to judge count of uart be used indeed*/
+
+        uartdev = ARRAY_SIZE(uart_devices);
+        no = min(uartdev, no);
+
+        for (uart = 0; uart < no; uart++, cfg++) {
+                if (cfg->hwport != uart)
+                        printk(KERN_ERR "w90x900_uartcfg[%d] error\n", uart);
+                platdev = uart_devices[cfg->hwport];
+                uart_devs[uart] = platdev;
+                platdev->dev.platform_data = cfg;
+        }
+        uart_count = uart;
+}
+
+/*Init W90P910 evb io*/
+
+void __init w90p910_map_io(struct map_desc *mach_desc, int mach_size)
+{
+        unsigned long idcode = 0x0;
+
+        iotable_init(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
+
+        idcode = __raw_readl(W90X900PDID);
+        if (idcode != W90P910_CPUID)
+                printk(KERN_ERR "CPU type 0x%08lx is not W90P910\n", idcode);
+}
+
+/*Init W90P910 clock*/
+
+void __init w90p910_init_clocks(int xtal)
+{
+}
+
+static int __init w90p910_init_cpu(void)
+{
+        return 0;
+}
+
+static int __init w90x900_arch_init(void)
+{
+        int ret;
+
+        ret = w90p910_init_cpu();
+        if (ret != 0)
+                return ret;
+
+        return platform_add_devices(uart_devs, uart_count);
+
+}
+arch_initcall(w90x900_arch_init);