release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-mmp/pxa910.c

   1 /*
   2  *  linux/arch/arm/mach-mmp/pxa910.c
   3  *
   4  *  Code specific to PXA910
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/list.h>
  15 #include <linux/io.h>
  16
  17 #include <asm/mach/time.h>
  18 #include <mach/addr-map.h>
  19 #include <mach/regs-apbc.h>
  20 #include <mach/regs-apmu.h>
  21 #include <mach/cputype.h>
  22 #include <mach/irqs.h>
  23 #include <mach/gpio.h>
  24 #include <mach/dma.h>
  25 #include <mach/mfp.h>
  26 #include <mach/devices.h>
  27
  28 #include "common.h"
  29 #include "clock.h"
  30
  31 #define MFPR_VIRT_BASE  (APB_VIRT_BASE + 0x1e000)
  32
  33 static struct mfp_addr_map pxa910_mfp_addr_map[] __initdata =
  34 {
  35         MFP_ADDR_X(GPIO0, GPIO54, 0xdc),
  36         MFP_ADDR_X(GPIO67, GPIO98, 0x1b8),
  37         MFP_ADDR_X(GPIO100, GPIO109, 0x238),
  38
  39         MFP_ADDR(GPIO123, 0xcc),
  40         MFP_ADDR(GPIO124, 0xd0),
  41
  42         MFP_ADDR(DF_IO0, 0x40),
  43         MFP_ADDR(DF_IO1, 0x3c),
  44         MFP_ADDR(DF_IO2, 0x38),
  45         MFP_ADDR(DF_IO3, 0x34),
  46         MFP_ADDR(DF_IO4, 0x30),
  47         MFP_ADDR(DF_IO5, 0x2c),
  48         MFP_ADDR(DF_IO6, 0x28),
  49         MFP_ADDR(DF_IO7, 0x24),
  50         MFP_ADDR(DF_IO8, 0x20),
  51         MFP_ADDR(DF_IO9, 0x1c),
  52         MFP_ADDR(DF_IO10, 0x18),
  53         MFP_ADDR(DF_IO11, 0x14),
  54         MFP_ADDR(DF_IO12, 0x10),
  55         MFP_ADDR(DF_IO13, 0xc),
  56         MFP_ADDR(DF_IO14, 0x8),
  57         MFP_ADDR(DF_IO15, 0x4),
  58
  59         MFP_ADDR(DF_nCS0_SM_nCS2, 0x44),
  60         MFP_ADDR(DF_nCS1_SM_nCS3, 0x48),
  61         MFP_ADDR(SM_nCS0, 0x4c),
  62         MFP_ADDR(SM_nCS1, 0x50),
  63         MFP_ADDR(DF_WEn, 0x54),
  64         MFP_ADDR(DF_REn, 0x58),
  65         MFP_ADDR(DF_CLE_SM_OEn, 0x5c),
  66         MFP_ADDR(DF_ALE_SM_WEn, 0x60),
  67         MFP_ADDR(SM_SCLK, 0x64),
  68         MFP_ADDR(DF_RDY0, 0x68),
  69         MFP_ADDR(SM_BE0, 0x6c),
  70         MFP_ADDR(SM_BE1, 0x70),
  71         MFP_ADDR(SM_ADV, 0x74),
  72         MFP_ADDR(DF_RDY1, 0x78),
  73         MFP_ADDR(SM_ADVMUX, 0x7c),
  74         MFP_ADDR(SM_RDY, 0x80),
  75
  76         MFP_ADDR_X(MMC1_DAT7, MMC1_WP, 0x84),
  77
  78         MFP_ADDR_END,
  79 };
  80
  81 #define APMASK(i)       (GPIO_REGS_VIRT + BANK_OFF(i) + 0x09c)
  82
  83 static void __init pxa910_init_gpio(void)
  84 {
  85         int i;
  86
  87         /* enable GPIO clock */
  88         __raw_writel(APBC_APBCLK | APBC_FNCLK, APBC_PXA910_GPIO);
  89
  90         /* unmask GPIO edge detection for all 4 banks - APMASKx */
  91         for (i = 0; i < 4; i++)
  92                 __raw_writel(0xffffffff, APMASK(i));
  93
  94         pxa_init_gpio(IRQ_PXA910_AP_GPIO, 0, 127, NULL);
  95 }
  96
  97 void __init pxa910_init_irq(void)
  98 {
  99         icu_init_irq();
 100         pxa910_init_gpio();
 101 }
 102
 103 /* APB peripheral clocks */
 104 static APBC_CLK(uart1, PXA910_UART0, 1, 14745600);
 105 static APBC_CLK(uart2, PXA910_UART1, 1, 14745600);
 106 static APBC_CLK(twsi0, PXA168_TWSI0, 1, 33000000);
 107 static APBC_CLK(twsi1, PXA168_TWSI1, 1, 33000000);
 108 static APBC_CLK(pwm1, PXA910_PWM1, 1, 13000000);
 109 static APBC_CLK(pwm2, PXA910_PWM2, 1, 13000000);
 110 static APBC_CLK(pwm3, PXA910_PWM3, 1, 13000000);
 111 static APBC_CLK(pwm4, PXA910_PWM4, 1, 13000000);
 112
 113 static APMU_CLK(nand, NAND, 0x01db, 208000000);
 114
 115 /* device and clock bindings */
 116 static struct clk_lookup pxa910_clkregs[] = {
 117         INIT_CLKREG(&clk_uart1, "pxa2xx-uart.0", NULL),
 118         INIT_CLKREG(&clk_uart2, "pxa2xx-uart.1", NULL),
 119         INIT_CLKREG(&clk_twsi0, "pxa2xx-i2c.0", NULL),
 120         INIT_CLKREG(&clk_twsi1, "pxa2xx-i2c.1", NULL),
 121         INIT_CLKREG(&clk_pwm1, "pxa910-pwm.0", NULL),
 122         INIT_CLKREG(&clk_pwm2, "pxa910-pwm.1", NULL),
 123         INIT_CLKREG(&clk_pwm3, "pxa910-pwm.2", NULL),
 124         INIT_CLKREG(&clk_pwm4, "pxa910-pwm.3", NULL),
 125         INIT_CLKREG(&clk_nand, "pxa3xx-nand", NULL),
 126 };
 127
 128 static int __init pxa910_init(void)
 129 {
 130         if (cpu_is_pxa910()) {
 131                 mfp_init_base(MFPR_VIRT_BASE);
 132                 mfp_init_addr(pxa910_mfp_addr_map);
 133                 pxa_init_dma(IRQ_PXA910_DMA_INT0, 32);
 134                 clkdev_add_table(ARRAY_AND_SIZE(pxa910_clkregs));
 135         }
 136
 137         return 0;
 138 }
 139 postcore_initcall(pxa910_init);
 140
 141 /* system timer - clock enabled, 3.25MHz */
 142 #define TIMER_CLK_RST   (APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(3))
 143
 144 static void __init pxa910_timer_init(void)
 145 {
 146         /* reset and configure */
 147         __raw_writel(APBC_APBCLK | APBC_RST, APBC_PXA910_TIMERS);
 148         __raw_writel(TIMER_CLK_RST, APBC_PXA910_TIMERS);
 149
 150         timer_init(IRQ_PXA910_AP1_TIMER1);
 151 }
 152
 153 struct sys_timer pxa910_timer = {
 154         .init   = pxa910_timer_init,
 155 };
 156
 157 /* on-chip devices */
 158
 159 /* NOTE: there are totally 3 UARTs on PXA910:
 160  *
 161  *   UART1   - Slow UART (can be used both by AP and CP)
 162  *   UART2/3 - Fast UART
 163  *
 164  * To be backward compatible with the legacy FFUART/BTUART/STUART sequence,
 165  * they are re-ordered as:
 166  *
 167  *   pxa910_device_uart1 - UART2 as FFUART
 168  *   pxa910_device_uart2 - UART3 as BTUART
 169  *
 170  * UART1 is not used by AP for the moment.
 171  */
 172 PXA910_DEVICE(uart1, "pxa2xx-uart", 0, UART2, 0xd4017000, 0x30, 21, 22);
 173 PXA910_DEVICE(uart2, "pxa2xx-uart", 1, UART3, 0xd4018000, 0x30, 23, 24);
 174 PXA910_DEVICE(twsi0, "pxa2xx-i2c", 0, TWSI0, 0xd4011000, 0x28);
 175 PXA910_DEVICE(twsi1, "pxa2xx-i2c", 1, TWSI1, 0xd4025000, 0x28);
 176 PXA910_DEVICE(pwm1, "pxa910-pwm", 0, NONE, 0xd401a000, 0x10);
 177 PXA910_DEVICE(pwm2, "pxa910-pwm", 1, NONE, 0xd401a400, 0x10);
 178 PXA910_DEVICE(pwm3, "pxa910-pwm", 2, NONE, 0xd401a800, 0x10);
 179 PXA910_DEVICE(pwm4, "pxa910-pwm", 3, NONE, 0xd401ac00, 0x10);
 180 PXA910_DEVICE(nand, "pxa3xx-nand", -1, NAND, 0xd4283000, 0x80, 97, 99);