LXR linux/arch/arm/mach-pxa/zylonite

   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
  26static 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
 102static 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
 119static 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
 127static 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
 160void __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}
 174