arch/arm/mach-pxa/zylonite_pxa300.c

   1 /*
   2  * linux/arch/arm/mach-pxa/zylonite_pxa300.c
   3  *
   4  * PXA300/PXA310 specific support code for the
   5  * PXA3xx Development Platform (aka Zylonite)
   6  *
   7  * Copyright (C) 2007 Marvell Internation Ltd.
   8  * 2007-08-21: eric miao <eric.y.miao@gmail.com>
   9  *             initial version
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19
  20 #include <asm/gpio.h>
  21 #include <asm/arch/mfp-pxa300.h>
  22 #include <asm/arch/zylonite.h>
  23
  24 #define ARRAY_AND_SIZE(x)       (x), ARRAY_SIZE(x)
  25
  26 /* PXA300/PXA310 common configurations */
  27 static mfp_cfg_t common_mfp_cfg[] __initdata = {
  28         /* LCD */
  29         GPIO54_LCD_LDD_0,
  30         GPIO55_LCD_LDD_1,
  31         GPIO56_LCD_LDD_2,
  32         GPIO57_LCD_LDD_3,
  33         GPIO58_LCD_LDD_4,
  34         GPIO59_LCD_LDD_5,
  35         GPIO60_LCD_LDD_6,
  36         GPIO61_LCD_LDD_7,
  37         GPIO62_LCD_LDD_8,
  38         GPIO63_LCD_LDD_9,
  39         GPIO64_LCD_LDD_10,
  40         GPIO65_LCD_LDD_11,
  41         GPIO66_LCD_LDD_12,
  42         GPIO67_LCD_LDD_13,
  43         GPIO68_LCD_LDD_14,
  44         GPIO69_LCD_LDD_15,
  45         GPIO70_LCD_LDD_16,
  46         GPIO71_LCD_LDD_17,
  47         GPIO72_LCD_FCLK,
  48         GPIO73_LCD_LCLK,
  49         GPIO74_LCD_PCLK,
  50         GPIO75_LCD_BIAS,
  51         GPIO76_LCD_VSYNC,
  52         GPIO127_LCD_CS_N,
  53
  54         /* BTUART */
  55         GPIO111_UART2_RTS,
  56         GPIO112_UART2_RXD,
  57         GPIO113_UART2_TXD,
  58         GPIO114_UART2_CTS,
  59
  60         /* STUART */
  61         GPIO109_UART3_TXD,
  62         GPIO110_UART3_RXD,
  63
  64         /* AC97 */
  65         GPIO23_AC97_nACRESET,
  66         GPIO24_AC97_SYSCLK,
  67         GPIO29_AC97_BITCLK,
  68         GPIO25_AC97_SDATA_IN_0,
  69         GPIO27_AC97_SDATA_OUT,
  70         GPIO28_AC97_SYNC,
  71
  72         /* Keypad */
  73         GPIO107_KP_DKIN_0,
  74         GPIO108_KP_DKIN_1,
  75         GPIO115_KP_MKIN_0,
  76         GPIO116_KP_MKIN_1,
  77         GPIO117_KP_MKIN_2,
  78         GPIO118_KP_MKIN_3,
  79         GPIO119_KP_MKIN_4,
  80         GPIO120_KP_MKIN_5,
  81         GPIO2_2_KP_MKIN_6,
  82         GPIO3_2_KP_MKIN_7,
  83         GPIO121_KP_MKOUT_0,
  84         GPIO122_KP_MKOUT_1,
  85         GPIO123_KP_MKOUT_2,
  86         GPIO124_KP_MKOUT_3,
  87         GPIO125_KP_MKOUT_4,
  88         GPIO4_2_KP_MKOUT_5,
  89         GPIO5_2_KP_MKOUT_6,
  90         GPIO6_2_KP_MKOUT_7,
  91 };
  92
  93 static mfp_cfg_t pxa300_mfp_cfg[] __initdata = {
  94         /* FFUART */
  95         GPIO30_UART1_RXD,
  96         GPIO31_UART1_TXD,
  97         GPIO32_UART1_CTS,
  98         GPIO37_UART1_RTS,
  99         GPIO33_UART1_DCD,
 100         GPIO34_UART1_DSR,
 101         GPIO35_UART1_RI,
 102         GPIO36_UART1_DTR,
 103
 104         /* Ethernet */
 105         GPIO2_nCS3,
 106         GPIO99_GPIO,
 107 };
 108
 109 static mfp_cfg_t pxa310_mfp_cfg[] __initdata = {
 110         /* FFUART */
 111         GPIO99_UART1_RXD,
 112         GPIO100_UART1_TXD,
 113         GPIO101_UART1_CTS,
 114         GPIO106_UART1_RTS,
 115
 116         /* Ethernet */
 117         GPIO2_nCS3,
 118         GPIO102_GPIO,
 119 };
 120
 121 #define NUM_LCD_DETECT_PINS     7
 122
 123 static int lcd_detect_pins[] __initdata = {
 124         MFP_PIN_GPIO71, /* LCD_LDD_17 - ORIENT */
 125         MFP_PIN_GPIO70, /* LCD_LDD_16 - LCDID[5] */
 126         MFP_PIN_GPIO75, /* LCD_BIAS   - LCDID[4] */
 127         MFP_PIN_GPIO73, /* LCD_LCLK   - LCDID[3] */
 128         MFP_PIN_GPIO72, /* LCD_FCLK   - LCDID[2] */
 129         MFP_PIN_GPIO127,/* LCD_CS_N   - LCDID[1] */
 130         MFP_PIN_GPIO76, /* LCD_VSYNC  - LCDID[0] */
 131 };
 132
 133 static void __init zylonite_detect_lcd_panel(void)
 134 {
 135         unsigned long mfpr_save[NUM_LCD_DETECT_PINS];
 136         int i, gpio, id = 0;
 137
 138         /* save the original MFP settings of these pins and configure
 139          * them as GPIO Input, DS01X, Pull Neither, Edge Clear
 140          */
 141         for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
 142                 mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
 143                 pxa3xx_mfp_write(lcd_detect_pins[i], 0x8440);
 144         }
 145
 146         for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
 147                 id = id << 1;
 148                 gpio = mfp_to_gpio(lcd_detect_pins[i]);
 149                 gpio_direction_input(gpio);
 150
 151                 if (gpio_get_value(gpio))
 152                         id = id | 0x1;
 153         }
 154
 155         /* lcd id, flush out bit 1 */
 156         lcd_id = id & 0x3d;
 157
 158         /* lcd orientation, portrait or landscape */
 159         lcd_orientation = (id >> 6) & 0x1;
 160
 161         /* restore the original MFP settings */
 162         for (i = 0; i < NUM_LCD_DETECT_PINS; i++)
 163                 pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
 164 }
 165
 166 void __init zylonite_pxa300_init(void)
 167 {
 168         if (cpu_is_pxa300() || cpu_is_pxa310()) {
 169                 /* initialize MFP */
 170                 pxa3xx_mfp_config(ARRAY_AND_SIZE(common_mfp_cfg));
 171
 172                 /* detect LCD panel */
 173                 zylonite_detect_lcd_panel();
 174
 175                 /* GPIO pin assignment */
 176                 gpio_backlight = mfp_to_gpio(MFP_PIN_GPIO20);
 177         }
 178
 179         if (cpu_is_pxa300()) {
 180                 pxa3xx_mfp_config(ARRAY_AND_SIZE(pxa300_mfp_cfg));
 181                 gpio_eth_irq = mfp_to_gpio(MFP_PIN_GPIO99);
 182         }
 183
 184         if (cpu_is_pxa310()) {
 185                 pxa3xx_mfp_config(ARRAY_AND_SIZE(pxa310_mfp_cfg));
 186                 gpio_eth_irq = mfp_to_gpio(MFP_PIN_GPIO102);
 187         }
 188 }