release/src-rt-6.x.4708/linux/linux-2.6.36/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 #include <linux/gpio.h>
  20
  21 #include <mach/pxa320.h>
  22 #include <mach/zylonite.h>
  23
  24 #include "generic.h"
  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         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
 138 static 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
 155 static 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
 163 static 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
 198 void __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 }