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  * All rights reserved.
   8  *
   9  * Wan ZongShun <mcuos.com@gmail.com>
  10  *
  11  * W90P910 cpu support
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/types.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/list.h>
  24 #include <linux/timer.h>
  25 #include <linux/init.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/io.h>
  28
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/map.h>
  31 #include <asm/mach/irq.h>
  32 #include <asm/irq.h>
  33
  34 #include <mach/hardware.h>
  35 #include <mach/regs-serial.h>
  36
  37 #include "cpu.h"
  38
  39 /*W90P910 has five uarts*/
  40
  41 #define MAX_UART_COUNT 5
  42 static int uart_count;
  43 static struct platform_device *uart_devs[MAX_UART_COUNT-1];
  44
  45 /* Initial IO mappings */
  46
  47 static struct map_desc w90p910_iodesc[] __initdata = {
  48         IODESC_ENT(IRQ),
  49         IODESC_ENT(GCR),
  50         IODESC_ENT(UART),
  51         IODESC_ENT(TIMER),
  52         IODESC_ENT(EBI),
  53         /*IODESC_ENT(LCD),*/
  54 };
  55
  56 /*Init the dev resource*/
  57
  58 static W90X900_RES(UART0);
  59 static W90X900_RES(UART1);
  60 static W90X900_RES(UART2);
  61 static W90X900_RES(UART3);
  62 static W90X900_RES(UART4);
  63 static W90X900_DEVICE(uart0, UART0, 0, "w90x900-uart");
  64 static W90X900_DEVICE(uart1, UART1, 1, "w90x900-uart");
  65 static W90X900_DEVICE(uart2, UART2, 2, "w90x900-uart");
  66 static W90X900_DEVICE(uart3, UART3, 3, "w90x900-uart");
  67 static W90X900_DEVICE(uart4, UART4, 4, "w90x900-uart");
  68
  69 static struct platform_device *uart_devices[] __initdata = {
  70         &w90x900_uart0,
  71         &w90x900_uart1,
  72         &w90x900_uart2,
  73         &w90x900_uart3,
  74         &w90x900_uart4
  75 };
  76
  77 /*Init W90P910 uart device*/
  78
  79 void __init w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no)
  80 {
  81         struct platform_device *platdev;
  82         int uart, uartdev;
  83
  84         /*By min() to judge count of uart be used indeed*/
  85
  86         uartdev = ARRAY_SIZE(uart_devices);
  87         no = min(uartdev, no);
  88
  89         for (uart = 0; uart < no; uart++, cfg++) {
  90                 if (cfg->hwport != uart)
  91                         printk(KERN_ERR "w90x900_uartcfg[%d] error\n", uart);
  92                 platdev = uart_devices[cfg->hwport];
  93                 uart_devs[uart] = platdev;
  94                 platdev->dev.platform_data = cfg;
  95         }
  96         uart_count = uart;
  97 }
  98
  99 /*Init W90P910 evb io*/
 100
 101 void __init w90p910_map_io(struct map_desc *mach_desc, int mach_size)
 102 {
 103         unsigned long idcode = 0x0;
 104
 105         iotable_init(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
 106
 107         idcode = __raw_readl(W90X900PDID);
 108         if (idcode != W90P910_CPUID)
 109                 printk(KERN_ERR "CPU type 0x%08lx is not W90P910\n", idcode);
 110 }
 111
 112 /*Init W90P910 clock*/
 113
 114 void __init w90p910_init_clocks(int xtal)
 115 {
 116 }
 117
 118 static int __init w90p910_init_cpu(void)
 119 {
 120         return 0;
 121 }
 122
 123 static int __init w90x900_arch_init(void)
 124 {
 125         int ret;
 126
 127         ret = w90p910_init_cpu();
 128         if (ret != 0)
 129                 return ret;
 130
 131         return platform_add_devices(uart_devs, uart_count);
 132
 133 }
 134 arch_initcall(w90x900_arch_init);