arch/arm/mach-w90x900/w90p910.c

   1 /*
   2  * linux/arch/arm/mach-w90x900/w90p910.c
   3  *
   4  * Based on linux/arch/arm/plat-s3c24xx/s3c244x.c by Ben Dooks
   5  *
   6  * Copyright (c) 2008 Nuvoton technology corporation.
   7  *
   8  * Wan ZongShun <mcuos.com@gmail.com>
   9  *
  10  * W90P910 cpu support
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation;version 2 of the License.
  15  *
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/types.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/list.h>
  22 #include <linux/timer.h>
  23 #include <linux/init.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/io.h>
  26 #include <linux/serial_8250.h>
  27
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30 #include <asm/mach/irq.h>
  31 #include <asm/irq.h>
  32
  33 #include <mach/hardware.h>
  34 #include <mach/regs-serial.h>
  35
  36 #include "cpu.h"
  37
  38 /* Initial IO mappings */
  39
  40 static struct map_desc w90p910_iodesc[] __initdata = {
  41         IODESC_ENT(IRQ),
  42         IODESC_ENT(GCR),
  43         IODESC_ENT(UART),
  44         IODESC_ENT(TIMER),
  45         IODESC_ENT(EBI),
  46         IODESC_ENT(USBEHCIHOST),
  47         IODESC_ENT(USBOHCIHOST),
  48         IODESC_ENT(ADC),
  49         /*IODESC_ENT(LCD),*/
  50 };
  51
  52 /* Initial serial platform data */
  53
  54 struct plat_serial8250_port w90p910_uart_data[] = {
  55         W90X900_8250PORT(UART0),
  56 };
  57
  58 struct platform_device w90p910_serial_device = {
  59         .name                   = "serial8250",
  60         .id                     = PLAT8250_DEV_PLATFORM,
  61         .dev                    = {
  62                 .platform_data  = w90p910_uart_data,
  63         },
  64 };
  65
  66 /*Init W90P910 evb io*/
  67
  68 void __init w90p910_map_io(struct map_desc *mach_desc, int mach_size)
  69 {
  70         unsigned long idcode = 0x0;
  71
  72         iotable_init(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
  73
  74         idcode = __raw_readl(W90X900PDID);
  75         if (idcode != W90P910_CPUID)
  76                 printk(KERN_ERR "CPU type 0x%08lx is not W90P910\n", idcode);
  77 }
  78
  79 /*Init W90P910 clock*/
  80
  81 void __init w90p910_init_clocks(int xtal)
  82 {
  83 }
  84
  85 static int __init w90p910_init_cpu(void)
  86 {
  87         return 0;
  88 }
  89
  90 static int __init w90x900_arch_init(void)
  91 {
  92         return w90p910_init_cpu();
  93 }
  94 arch_initcall(w90x900_arch_init);