arch/arm/mach-tcc8k/board-tcc8000-sdk.c

   1 /*
   2  * Copyright (C) 2009 Hans J. Koch <hjk@linutronix.de>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/delay.h>
  10 #include <linux/init.h>
  11 #include <linux/kernel.h>
  12 #include <linux/platform_device.h>
  13
  14 #include <asm/mach-types.h>
  15
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <asm/mach/time.h>
  19
  20 #include <mach/clock.h>
  21 #include <mach/tcc-nand.h>
  22 #include <mach/tcc8k-regs.h>
  23
  24 #include "common.h"
  25
  26 #define XI_FREQUENCY    12000000
  27 #define XTI_FREQUENCY   32768
  28
  29 #ifdef CONFIG_MTD_NAND_TCC
  30 /* NAND */
  31 static struct tcc_nand_platform_data tcc8k_sdk_nand_data = {
  32         .width = 1,
  33         .hw_ecc = 0,
  34 };
  35 #endif
  36
  37 static void __init tcc8k_init(void)
  38 {
  39 #ifdef CONFIG_MTD_NAND_TCC
  40         tcc_nand_device.dev.platform_data = &tcc8k_sdk_nand_data;
  41         platform_device_register(&tcc_nand_device);
  42 #endif
  43 }
  44
  45 static void __init tcc8k_init_timer(void)
  46 {
  47         tcc_clocks_init(XI_FREQUENCY, XTI_FREQUENCY);
  48 }
  49
  50 static struct sys_timer tcc8k_timer = {
  51         .init   = tcc8k_init_timer,
  52 };
  53
  54 static void __init tcc8k_map_io(void)
  55 {
  56         tcc8k_map_common_io();
  57
  58         /* set PLL0 clock to 96MHz, adapt UART0 divisor */
  59         __raw_writel(0x00026003, CKC_BASE + PLL0CFG_OFFS);
  60         __raw_writel(0x10000001, CKC_BASE + ACLKUART0_OFFS);
  61
  62         /* set PLL1 clock to 192MHz */
  63         __raw_writel(0x00016003, CKC_BASE + PLL1CFG_OFFS);
  64
  65         /* set PLL2 clock to 48MHz */
  66         __raw_writel(0x00036003, CKC_BASE + PLL2CFG_OFFS);
  67
  68         /* with CPU freq higher than 150 MHz, need extra DTCM wait */
  69         __raw_writel(0x00000001, SCFG_BASE + DTCMWAIT_OFFS);
  70
  71         /* PLL locking time as specified */
  72         udelay(300);
  73 }
  74
  75 MACHINE_START(TCC8000_SDK, "Telechips TCC8000-SDK Demo Board")
  76         .atag_offset    = 0x100,
  77         .map_io         = tcc8k_map_io,
  78         .init_irq       = tcc8k_init_irq,
  79         .init_machine   = tcc8k_init,
  80         .timer          = &tcc8k_timer,
  81 MACHINE_END