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 #include "clock.h"
  38
  39 /* Initial IO mappings */
  40
  41 static struct map_desc w90p910_iodesc[] __initdata = {
  42         IODESC_ENT(IRQ),
  43         IODESC_ENT(GCR),
  44         IODESC_ENT(UART),
  45         IODESC_ENT(TIMER),
  46         IODESC_ENT(EBI),
  47         IODESC_ENT(USBEHCIHOST),
  48         IODESC_ENT(USBOHCIHOST),
  49         IODESC_ENT(ADC),
  50         IODESC_ENT(RTC),
  51         IODESC_ENT(KPI),
  52         IODESC_ENT(USBDEV),
  53         /*IODESC_ENT(LCD),*/
  54 };
  55
  56 /* Initial clock declarations. */
  57 static DEFINE_CLK(lcd, 0);
  58 static DEFINE_CLK(audio, 1);
  59 static DEFINE_CLK(fmi, 4);
  60 static DEFINE_CLK(dmac, 5);
  61 static DEFINE_CLK(atapi, 6);
  62 static DEFINE_CLK(emc, 7);
  63 static DEFINE_CLK(usbd, 8);
  64 static DEFINE_CLK(usbh, 9);
  65 static DEFINE_CLK(g2d, 10);;
  66 static DEFINE_CLK(pwm, 18);
  67 static DEFINE_CLK(ps2, 24);
  68 static DEFINE_CLK(kpi, 25);
  69 static DEFINE_CLK(wdt, 26);
  70 static DEFINE_CLK(gdma, 27);
  71 static DEFINE_CLK(adc, 28);
  72 static DEFINE_CLK(usi, 29);
  73
  74 static struct clk_lookup w90p910_clkregs[] = {
  75         DEF_CLKLOOK(&clk_lcd, "w90p910-lcd", NULL),
  76         DEF_CLKLOOK(&clk_audio, "w90p910-audio", NULL),
  77         DEF_CLKLOOK(&clk_fmi, "w90p910-fmi", NULL),
  78         DEF_CLKLOOK(&clk_dmac, "w90p910-dmac", NULL),
  79         DEF_CLKLOOK(&clk_atapi, "w90p910-atapi", NULL),
  80         DEF_CLKLOOK(&clk_emc, "w90p910-emc", NULL),
  81         DEF_CLKLOOK(&clk_usbd, "w90p910-usbd", NULL),
  82         DEF_CLKLOOK(&clk_usbh, "w90p910-usbh", NULL),
  83         DEF_CLKLOOK(&clk_g2d, "w90p910-g2d", NULL),
  84         DEF_CLKLOOK(&clk_pwm, "w90p910-pwm", NULL),
  85         DEF_CLKLOOK(&clk_ps2, "w90p910-ps2", NULL),
  86         DEF_CLKLOOK(&clk_kpi, "w90p910-kpi", NULL),
  87         DEF_CLKLOOK(&clk_wdt, "w90p910-wdt", NULL),
  88         DEF_CLKLOOK(&clk_gdma, "w90p910-gdma", NULL),
  89         DEF_CLKLOOK(&clk_adc, "w90p910-adc", NULL),
  90         DEF_CLKLOOK(&clk_usi, "w90p910-usi", NULL),
  91 };
  92
  93 /* Initial serial platform data */
  94
  95 struct plat_serial8250_port w90p910_uart_data[] = {
  96         W90X900_8250PORT(UART0),
  97 };
  98
  99 struct platform_device w90p910_serial_device = {
 100         .name                   = "serial8250",
 101         .id                     = PLAT8250_DEV_PLATFORM,
 102         .dev                    = {
 103                 .platform_data  = w90p910_uart_data,
 104         },
 105 };
 106
 107 /*Init W90P910 evb io*/
 108
 109 void __init w90p910_map_io(struct map_desc *mach_desc, int mach_size)
 110 {
 111         unsigned long idcode = 0x0;
 112
 113         iotable_init(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
 114
 115         idcode = __raw_readl(W90X900PDID);
 116         if (idcode != W90P910_CPUID)
 117                 printk(KERN_ERR "CPU type 0x%08lx is not W90P910\n", idcode);
 118 }
 119
 120 /*Init W90P910 clock*/
 121
 122 void __init w90p910_init_clocks(void)
 123 {
 124         clks_register(w90p910_clkregs, ARRAY_SIZE(w90p910_clkregs));
 125 }
 126
 127 static int __init w90p910_init_cpu(void)
 128 {
 129         return 0;
 130 }
 131
 132 static int __init w90x900_arch_init(void)
 133 {
 134         return w90p910_init_cpu();
 135 }
 136 arch_initcall(w90x900_arch_init);