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#include <linux/gpio.h>
  20
  21#include "pxa320.h"
  22#include "zylonite.h"
  23
  24#include "generic.h"
  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        GPIO14_PWM3_OUT,        /* backlight */
  53
  54        /* FFUART */
  55        GPIO41_UART1_RXD | MFP_LPM_EDGE_FALL,
  56        GPIO42_UART1_TXD,
  57        GPIO43_UART1_CTS,
  58        GPIO44_UART1_DCD,
  59        GPIO45_UART1_DSR | MFP_LPM_EDGE_FALL,
  60        GPIO46_UART1_RI,
  61        GPIO47_UART1_DTR,
  62        GPIO48_UART1_RTS,
  63
  64        /* AC97 */
  65        GPIO34_AC97_SYSCLK,
  66        GPIO35_AC97_SDATA_IN_0,
  67        GPIO37_AC97_SDATA_OUT,
  68        GPIO38_AC97_SYNC,
  69        GPIO39_AC97_BITCLK,
  70        GPIO40_AC97_nACRESET,
  71        GPIO36_GPIO,    /* SDATA_IN_1 but unused - configure to GPIO */
  72
  73        /* SSP3 */
  74        GPIO89_SSP3_SCLK,
  75        GPIO90_SSP3_FRM,
  76        GPIO91_SSP3_TXD,
  77        GPIO92_SSP3_RXD,
  78
  79        /* WM9713 IRQ */
  80        GPIO15_GPIO,
  81
  82        /* I2C */
  83        GPIO32_I2C_SCL,
  84        GPIO33_I2C_SDA,
  85
  86        /* Keypad */
  87        GPIO105_KP_DKIN_0 | MFP_LPM_EDGE_BOTH,
  88        GPIO106_KP_DKIN_1 | MFP_LPM_EDGE_BOTH,
  89        GPIO113_KP_MKIN_0 | MFP_LPM_EDGE_BOTH,
  90        GPIO114_KP_MKIN_1 | MFP_LPM_EDGE_BOTH,
  91        GPIO115_KP_MKIN_2 | MFP_LPM_EDGE_BOTH,
  92        GPIO116_KP_MKIN_3 | MFP_LPM_EDGE_BOTH,
  93        GPIO117_KP_MKIN_4 | MFP_LPM_EDGE_BOTH,
  94        GPIO118_KP_MKIN_5 | MFP_LPM_EDGE_BOTH,
  95        GPIO119_KP_MKIN_6 | MFP_LPM_EDGE_BOTH,
  96        GPIO120_KP_MKIN_7 | MFP_LPM_EDGE_BOTH,
  97        GPIO121_KP_MKOUT_0,
  98        GPIO122_KP_MKOUT_1,
  99        GPIO123_KP_MKOUT_2,
 100        GPIO124_KP_MKOUT_3,
 101        GPIO125_KP_MKOUT_4,
 102        GPIO126_KP_MKOUT_5,
 103        GPIO127_KP_MKOUT_6,
 104        GPIO5_2_KP_MKOUT_7,
 105
 106        /* Ethernet */
 107        GPIO4_nCS3,
 108        GPIO90_GPIO,
 109
 110        /* MMC1 */
 111        GPIO18_MMC1_DAT0,
 112        GPIO19_MMC1_DAT1 | MFP_LPM_EDGE_BOTH,
 113        GPIO20_MMC1_DAT2,
 114        GPIO21_MMC1_DAT3,
 115        GPIO22_MMC1_CLK,
 116        GPIO23_MMC1_CMD,/* CMD0 for slot 0 */
 117        GPIO31_GPIO,    /* CMD1 default as GPIO for slot 0 */
 118
 119        /* MMC2 */
 120        GPIO24_MMC2_DAT0,
 121        GPIO25_MMC2_DAT1 | MFP_LPM_EDGE_BOTH,
 122        GPIO26_MMC2_DAT2,
 123        GPIO27_MMC2_DAT3,
 124        GPIO28_MMC2_CLK,
 125        GPIO29_MMC2_CMD,
 126
 127        /* USB Host */
 128        GPIO2_2_USBH_PEN,
 129        GPIO3_2_USBH_PWR,
 130
 131        /* Debug LEDs */
 132        GPIO1_2_GPIO | MFP_LPM_DRIVE_HIGH,
 133        GPIO4_2_GPIO | MFP_LPM_DRIVE_HIGH,
 134};
 135
 136#define NUM_LCD_DETECT_PINS     7
 137
 138static int lcd_detect_pins[] __initdata = {
 139        MFP_PIN_GPIO72,   /* LCD_LDD_17 - ORIENT */
 140        MFP_PIN_GPIO71,   /* LCD_LDD_16 - LCDID[5] */
 141        MFP_PIN_GPIO17_2, /* LCD_BIAS   - LCDID[4] */
 142        MFP_PIN_GPIO15_2, /* LCD_LCLK   - LCDID[3] */
 143        MFP_PIN_GPIO14_2, /* LCD_FCLK   - LCDID[2] */
 144        MFP_PIN_GPIO73,   /* LCD_CS_N   - LCDID[1] */
 145        MFP_PIN_GPIO74,   /* LCD_VSYNC  - LCDID[0] */
 146        /*
 147         * set the MFP_PIN_GPIO 14/15/17 to alternate function other than
 148         * GPIO to avoid input level confliction with 14_2, 15_2, 17_2
 149         */
 150        MFP_PIN_GPIO14,
 151        MFP_PIN_GPIO15,
 152        MFP_PIN_GPIO17,
 153};
 154
 155static int lcd_detect_mfpr[] __initdata = {
 156        /* AF0, DS 1X, Pull Neither, Edge Clear */
 157        0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440,
 158        0xc442, /* Backlight, Pull-Up, AF2 */
 159        0x8445, /* AF5 */
 160        0x8445, /* AF5 */
 161};
 162
 163static void __init zylonite_detect_lcd_panel(void)
 164{
 165        unsigned long mfpr_save[ARRAY_SIZE(lcd_detect_pins)];
 166        int i, gpio, id = 0;
 167
 168        /* save the original MFP settings of these pins and configure them
 169         * as GPIO Input, DS01X, Pull Neither, Edge Clear
 170         */
 171        for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++) {
 172                mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
 173                pxa3xx_mfp_write(lcd_detect_pins[i], lcd_detect_mfpr[i]);
 174        }
 175
 176        for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
 177                id = id << 1;
 178                gpio = mfp_to_gpio(lcd_detect_pins[i]);
 179                gpio_request(gpio, "LCD_ID_PINS");
 180                gpio_direction_input(gpio);
 181
 182                if (gpio_get_value(gpio))
 183                        id = id | 0x1;
 184                gpio_free(gpio);
 185        }
 186
 187        /* lcd id, flush out bit 1 */
 188        lcd_id = id & 0x3d;
 189
 190        /* lcd orientation, portrait or landscape */
 191        lcd_orientation = (id >> 6) & 0x1;
 192
 193        /* restore the original MFP settings */
 194        for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++)
 195                pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
 196}
 197
 198void __init zylonite_pxa320_init(void)
 199{
 200        if (cpu_is_pxa320()) {
 201                /* initialize MFP */
 202                pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_cfg));
 203
 204                /* detect LCD panel */
 205                zylonite_detect_lcd_panel();
 206
 207                /* GPIO pin assignment */
 208                gpio_eth_irq    = mfp_to_gpio(MFP_PIN_GPIO9);
 209                gpio_debug_led1 = mfp_to_gpio(MFP_PIN_GPIO1_2);
 210                gpio_debug_led2 = mfp_to_gpio(MFP_PIN_GPIO4_2);
 211
 212                /* WM9713 IRQ */
 213                wm9713_irq = mfp_to_gpio(MFP_PIN_GPIO15);
 214        }
 215}
 216