arch/arm/mach-pxa/zylonite_pxa320.c

   1 /*
   2  * linux/arch/arm/mach-pxa/zylonite_pxa320.c
   3  *
   4  * PXA320 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.miao@marvell.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/arch/gpio.h>
  21 #include <asm/arch/mfp-pxa320.h>
  22 #include <asm/arch/zylonite.h>
  23
  24 #define ARRAY_AND_SIZE(x)       (x), ARRAY_SIZE(x)
  25
  26 static mfp_cfg_t mfp_cfg[] __initdata = {
  27         /* LCD */
  28         GPIO6_2_LCD_LDD_0,
  29         GPIO7_2_LCD_LDD_1,
  30         GPIO8_2_LCD_LDD_2,
  31         GPIO9_2_LCD_LDD_3,
  32         GPIO10_2_LCD_LDD_4,
  33         GPIO11_2_LCD_LDD_5,
  34         GPIO12_2_LCD_LDD_6,
  35         GPIO13_2_LCD_LDD_7,
  36         GPIO63_LCD_LDD_8,
  37         GPIO64_LCD_LDD_9,
  38         GPIO65_LCD_LDD_10,
  39         GPIO66_LCD_LDD_11,
  40         GPIO67_LCD_LDD_12,
  41         GPIO68_LCD_LDD_13,
  42         GPIO69_LCD_LDD_14,
  43         GPIO70_LCD_LDD_15,
  44         GPIO71_LCD_LDD_16,
  45         GPIO72_LCD_LDD_17,
  46         GPIO73_LCD_CS_N,
  47         GPIO74_LCD_VSYNC,
  48         GPIO14_2_LCD_FCLK,
  49         GPIO15_2_LCD_LCLK,
  50         GPIO16_2_LCD_PCLK,
  51         GPIO17_2_LCD_BIAS,
  52
  53         /* FFUART */
  54         GPIO41_UART1_RXD,
  55         GPIO42_UART1_TXD,
  56         GPIO43_UART1_CTS,
  57         GPIO44_UART1_DCD,
  58         GPIO45_UART1_DSR,
  59         GPIO46_UART1_RI,
  60         GPIO47_UART1_DTR,
  61         GPIO48_UART1_RTS,
  62
  63         /* AC97 */
  64         GPIO34_AC97_SYSCLK,
  65         GPIO35_AC97_SDATA_IN_0,
  66         GPIO37_AC97_SDATA_OUT,
  67         GPIO38_AC97_SYNC,
  68         GPIO39_AC97_BITCLK,
  69         GPIO40_AC97_nACRESET,
  70
  71         /* I2C */
  72         GPIO32_I2C_SCL,
  73         GPIO33_I2C_SDA,
  74
  75         /* Keypad */
  76         GPIO105_KP_DKIN_0,
  77         GPIO106_KP_DKIN_1,
  78         GPIO113_KP_MKIN_0,
  79         GPIO114_KP_MKIN_1,
  80         GPIO115_KP_MKIN_2,
  81         GPIO116_KP_MKIN_3,
  82         GPIO117_KP_MKIN_4,
  83         GPIO118_KP_MKIN_5,
  84         GPIO119_KP_MKIN_6,
  85         GPIO120_KP_MKIN_7,
  86         GPIO121_KP_MKOUT_0,
  87         GPIO122_KP_MKOUT_1,
  88         GPIO123_KP_MKOUT_2,
  89         GPIO124_KP_MKOUT_3,
  90         GPIO125_KP_MKOUT_4,
  91         GPIO126_KP_MKOUT_5,
  92         GPIO127_KP_MKOUT_6,
  93         GPIO5_2_KP_MKOUT_7,
  94
  95         /* Ethernet */
  96         GPIO4_nCS3,
  97         GPIO90_GPIO,
  98 };
  99
 100 #define NUM_LCD_DETECT_PINS     7
 101
 102 static int lcd_detect_pins[] __initdata = {
 103         MFP_PIN_GPIO72,   /* LCD_LDD_17 - ORIENT */
 104         MFP_PIN_GPIO71,   /* LCD_LDD_16 - LCDID[5] */
 105         MFP_PIN_GPIO17_2, /* LCD_BIAS   - LCDID[4] */
 106         MFP_PIN_GPIO15_2, /* LCD_LCLK   - LCDID[3] */
 107         MFP_PIN_GPIO14_2, /* LCD_FCLK   - LCDID[2] */
 108         MFP_PIN_GPIO73,   /* LCD_CS_N   - LCDID[1] */
 109         MFP_PIN_GPIO74,   /* LCD_VSYNC  - LCDID[0] */
 110         /*
 111          * set the MFP_PIN_GPIO 14/15/17 to alternate function other than
 112          * GPIO to avoid input level confliction with 14_2, 15_2, 17_2
 113          */
 114         MFP_PIN_GPIO14,
 115         MFP_PIN_GPIO15,
 116         MFP_PIN_GPIO17,
 117 };
 118
 119 static int lcd_detect_mfpr[] __initdata = {
 120         /* AF0, DS 1X, Pull Neither, Edge Clear */
 121         0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440,
 122         0xc442, /* Backlight, Pull-Up, AF2 */
 123         0x8445, /* AF5 */
 124         0x8445, /* AF5 */
 125 };
 126
 127 static void __init zylonite_detect_lcd_panel(void)
 128 {
 129         unsigned long mfpr_save[ARRAY_SIZE(lcd_detect_pins)];
 130         int i, gpio, id = 0;
 131
 132         /* save the original MFP settings of these pins and configure them
 133          * as GPIO Input, DS01X, Pull Neither, Edge Clear
 134          */
 135         for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++) {
 136                 mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
 137                 pxa3xx_mfp_write(lcd_detect_pins[i], lcd_detect_mfpr[i]);
 138         }
 139
 140         for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
 141                 id = id << 1;
 142                 gpio = mfp_to_gpio(lcd_detect_pins[i]);
 143                 gpio_direction_input(gpio);
 144
 145                 if (gpio_get_value(gpio))
 146                         id = id | 0x1;
 147         }
 148
 149         /* lcd id, flush out bit 1 */
 150         lcd_id = id & 0x3d;
 151
 152         /* lcd orientation, portrait or landscape */
 153         lcd_orientation = (id >> 6) & 0x1;
 154
 155         /* restore the original MFP settings */
 156         for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++)
 157                 pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
 158 }
 159
 160 void __init zylonite_pxa320_init(void)
 161 {
 162         if (cpu_is_pxa320()) {
 163                 /* initialize MFP */
 164                 pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_cfg));
 165
 166                 /* detect LCD panel */
 167                 zylonite_detect_lcd_panel();
 168
 169                 /* GPIO pin assignment */
 170                 gpio_backlight  = mfp_to_gpio(MFP_PIN_GPIO14);
 171                 gpio_eth_irq    = mfp_to_gpio(MFP_PIN_GPIO9);
 172         }
 173 }