arch/arm/mach-nuc93x/cpu.c

   1 /*
   2  * linux/arch/arm/mach-nuc93x/cpu.c
   3  *
   4  * Copyright (c) 2009 Nuvoton corporation.
   5  *
   6  * Wan ZongShun <mcuos.com@gmail.com>
   7  *
   8  * NUC93x series cpu common support
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation;version 2 of the License.
  13  *
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/types.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/list.h>
  20 #include <linux/timer.h>
  21 #include <linux/init.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/io.h>
  24 #include <linux/serial_8250.h>
  25 #include <linux/delay.h>
  26
  27 #include <asm/mach/arch.h>
  28 #include <asm/mach/map.h>
  29 #include <asm/mach/irq.h>
  30 #include <asm/irq.h>
  31
  32 #include <mach/hardware.h>
  33 #include <mach/regs-serial.h>
  34 #include <mach/regs-clock.h>
  35 #include <mach/regs-ebi.h>
  36
  37 #include "cpu.h"
  38 #include "clock.h"
  39
  40 /* Initial IO mappings */
  41
  42 static struct map_desc nuc93x_iodesc[] __initdata = {
  43         IODESC_ENT(IRQ),
  44         IODESC_ENT(GCR),
  45         IODESC_ENT(UART),
  46         IODESC_ENT(TIMER),
  47         IODESC_ENT(EBI),
  48 };
  49
  50 /* Initial nuc932 clock declarations. */
  51 static DEFINE_CLK(audio, 2);
  52 static DEFINE_CLK(sd, 3);
  53 static DEFINE_CLK(jpg, 4);
  54 static DEFINE_CLK(video, 5);
  55 static DEFINE_CLK(vpost, 6);
  56 static DEFINE_CLK(2d, 7);
  57 static DEFINE_CLK(gpu, 8);
  58 static DEFINE_CLK(gdma, 9);
  59 static DEFINE_CLK(adc, 10);
  60 static DEFINE_CLK(uart, 11);
  61 static DEFINE_CLK(spi, 12);
  62 static DEFINE_CLK(pwm, 13);
  63 static DEFINE_CLK(timer, 14);
  64 static DEFINE_CLK(wdt, 15);
  65 static DEFINE_CLK(ac97, 16);
  66 static DEFINE_CLK(i2s, 16);
  67 static DEFINE_CLK(usbck, 17);
  68 static DEFINE_CLK(usb48, 18);
  69 static DEFINE_CLK(usbh, 19);
  70 static DEFINE_CLK(i2c, 20);
  71 static DEFINE_CLK(ext, 0);
  72
  73 static struct clk_lookup nuc932_clkregs[] = {
  74        DEF_CLKLOOK(&clk_audio, "nuc932-audio", NULL),
  75        DEF_CLKLOOK(&clk_sd, "nuc932-sd", NULL),
  76        DEF_CLKLOOK(&clk_jpg, "nuc932-jpg", "NULL"),
  77        DEF_CLKLOOK(&clk_video, "nuc932-video", "NULL"),
  78        DEF_CLKLOOK(&clk_vpost, "nuc932-vpost", NULL),
  79        DEF_CLKLOOK(&clk_2d, "nuc932-2d", NULL),
  80        DEF_CLKLOOK(&clk_gpu, "nuc932-gpu", NULL),
  81        DEF_CLKLOOK(&clk_gdma, "nuc932-gdma", "NULL"),
  82        DEF_CLKLOOK(&clk_adc, "nuc932-adc", NULL),
  83        DEF_CLKLOOK(&clk_uart, NULL, "uart"),
  84        DEF_CLKLOOK(&clk_spi, "nuc932-spi", NULL),
  85        DEF_CLKLOOK(&clk_pwm, "nuc932-pwm", NULL),
  86        DEF_CLKLOOK(&clk_timer, NULL, "timer"),
  87        DEF_CLKLOOK(&clk_wdt, "nuc932-wdt", NULL),
  88        DEF_CLKLOOK(&clk_ac97, "nuc932-ac97", NULL),
  89        DEF_CLKLOOK(&clk_i2s, "nuc932-i2s", NULL),
  90        DEF_CLKLOOK(&clk_usbck, "nuc932-usbck", NULL),
  91        DEF_CLKLOOK(&clk_usb48, "nuc932-usb48", NULL),
  92        DEF_CLKLOOK(&clk_usbh, "nuc932-usbh", NULL),
  93        DEF_CLKLOOK(&clk_i2c, "nuc932-i2c", NULL),
  94        DEF_CLKLOOK(&clk_ext, NULL, "ext"),
  95 };
  96
  97 /* Initial serial platform data */
  98
  99 struct plat_serial8250_port nuc93x_uart_data[] = {
 100         NUC93X_8250PORT(UART0),
 101         {},
 102 };
 103
 104 struct platform_device nuc93x_serial_device = {
 105         .name                   = "serial8250",
 106         .id                     = PLAT8250_DEV_PLATFORM,
 107         .dev                    = {
 108                 .platform_data  = nuc93x_uart_data,
 109         },
 110 };
 111
 112 /*Init NUC93x evb io*/
 113
 114 void __init nuc93x_map_io(struct map_desc *mach_desc, int mach_size)
 115 {
 116         unsigned long idcode = 0x0;
 117
 118         iotable_init(mach_desc, mach_size);
 119         iotable_init(nuc93x_iodesc, ARRAY_SIZE(nuc93x_iodesc));
 120
 121         idcode = __raw_readl(NUC93XPDID);
 122         if (idcode == NUC932_CPUID)
 123                 printk(KERN_INFO "CPU type 0x%08lx is NUC910\n", idcode);
 124         else
 125                 printk(KERN_ERR "CPU type detect error!\n");
 126
 127 }
 128
 129 /*Init NUC93x clock*/
 130
 131 void __init nuc93x_init_clocks(void)
 132 {
 133         clks_register(nuc932_clkregs, ARRAY_SIZE(nuc932_clkregs));
 134 }
 135