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zylonite_pxa320.c

/*
 * linux/arch/arm/mach-pxa/zylonite_pxa320.c
 *
 * PXA320 specific support code for the
 * PXA3xx Development Platform (aka Zylonite)
 *
 * Copyright (C) 2007 Marvell Internation Ltd.
 * 2007-08-21: eric miao <eric.miao@marvell.com>
 *             initial version
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>

#include <asm/arch/gpio.h>
#include <asm/arch/mfp-pxa320.h>
#include <asm/arch/zylonite.h>

#include "generic.h"

static mfp_cfg_t mfp_cfg[] __initdata = {
      /* LCD */
      GPIO6_2_LCD_LDD_0,
      GPIO7_2_LCD_LDD_1,
      GPIO8_2_LCD_LDD_2,
      GPIO9_2_LCD_LDD_3,
      GPIO10_2_LCD_LDD_4,
      GPIO11_2_LCD_LDD_5,
      GPIO12_2_LCD_LDD_6,
      GPIO13_2_LCD_LDD_7,
      GPIO63_LCD_LDD_8,
      GPIO64_LCD_LDD_9,
      GPIO65_LCD_LDD_10,
      GPIO66_LCD_LDD_11,
      GPIO67_LCD_LDD_12,
      GPIO68_LCD_LDD_13,
      GPIO69_LCD_LDD_14,
      GPIO70_LCD_LDD_15,
      GPIO71_LCD_LDD_16,
      GPIO72_LCD_LDD_17,
      GPIO73_LCD_CS_N,
      GPIO74_LCD_VSYNC,
      GPIO14_2_LCD_FCLK,
      GPIO15_2_LCD_LCLK,
      GPIO16_2_LCD_PCLK,
      GPIO17_2_LCD_BIAS,

      /* FFUART */
      GPIO41_UART1_RXD | MFP_LPM_EDGE_FALL,
      GPIO42_UART1_TXD,
      GPIO43_UART1_CTS,
      GPIO44_UART1_DCD,
      GPIO45_UART1_DSR | MFP_LPM_EDGE_FALL,
      GPIO46_UART1_RI,
      GPIO47_UART1_DTR,
      GPIO48_UART1_RTS,

      /* AC97 */
      GPIO34_AC97_SYSCLK,
      GPIO35_AC97_SDATA_IN_0,
      GPIO37_AC97_SDATA_OUT,
      GPIO38_AC97_SYNC,
      GPIO39_AC97_BITCLK,
      GPIO40_AC97_nACRESET,

      /* WM9713 IRQ */
      GPIO15_GPIO,

      /* I2C */
      GPIO32_I2C_SCL,
      GPIO33_I2C_SDA,

      /* Keypad */
      GPIO105_KP_DKIN_0 | MFP_LPM_EDGE_BOTH,
      GPIO106_KP_DKIN_1 | MFP_LPM_EDGE_BOTH,
      GPIO113_KP_MKIN_0 | MFP_LPM_EDGE_BOTH,
      GPIO114_KP_MKIN_1 | MFP_LPM_EDGE_BOTH,
      GPIO115_KP_MKIN_2 | MFP_LPM_EDGE_BOTH,
      GPIO116_KP_MKIN_3 | MFP_LPM_EDGE_BOTH,
      GPIO117_KP_MKIN_4 | MFP_LPM_EDGE_BOTH,
      GPIO118_KP_MKIN_5 | MFP_LPM_EDGE_BOTH,
      GPIO119_KP_MKIN_6 | MFP_LPM_EDGE_BOTH,
      GPIO120_KP_MKIN_7 | MFP_LPM_EDGE_BOTH,
      GPIO121_KP_MKOUT_0,
      GPIO122_KP_MKOUT_1,
      GPIO123_KP_MKOUT_2,
      GPIO124_KP_MKOUT_3,
      GPIO125_KP_MKOUT_4,
      GPIO126_KP_MKOUT_5,
      GPIO127_KP_MKOUT_6,
      GPIO5_2_KP_MKOUT_7,

      /* Ethernet */
      GPIO4_nCS3,
      GPIO90_GPIO,

      /* MMC1 */
      GPIO18_MMC1_DAT0,
      GPIO19_MMC1_DAT1 | MFP_LPM_EDGE_BOTH,
      GPIO20_MMC1_DAT2,
      GPIO21_MMC1_DAT3,
      GPIO22_MMC1_CLK,
      GPIO23_MMC1_CMD,/* CMD0 for slot 0 */
      GPIO31_GPIO,      /* CMD1 default as GPIO for slot 0 */

      /* MMC2 */
      GPIO24_MMC2_DAT0,
      GPIO25_MMC2_DAT1 | MFP_LPM_EDGE_BOTH,
      GPIO26_MMC2_DAT2,
      GPIO27_MMC2_DAT3,
      GPIO28_MMC2_CLK,
      GPIO29_MMC2_CMD,
};

#define NUM_LCD_DETECT_PINS   7

static int lcd_detect_pins[] __initdata = {
      MFP_PIN_GPIO72,   /* LCD_LDD_17 - ORIENT */
      MFP_PIN_GPIO71,   /* LCD_LDD_16 - LCDID[5] */
      MFP_PIN_GPIO17_2, /* LCD_BIAS   - LCDID[4] */
      MFP_PIN_GPIO15_2, /* LCD_LCLK   - LCDID[3] */
      MFP_PIN_GPIO14_2, /* LCD_FCLK   - LCDID[2] */
      MFP_PIN_GPIO73,   /* LCD_CS_N   - LCDID[1] */
      MFP_PIN_GPIO74,   /* LCD_VSYNC  - LCDID[0] */
      /*
       * set the MFP_PIN_GPIO 14/15/17 to alternate function other than
       * GPIO to avoid input level confliction with 14_2, 15_2, 17_2
       */
      MFP_PIN_GPIO14,
      MFP_PIN_GPIO15,
      MFP_PIN_GPIO17,
};

static int lcd_detect_mfpr[] __initdata = {
      /* AF0, DS 1X, Pull Neither, Edge Clear */
      0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440,
      0xc442, /* Backlight, Pull-Up, AF2 */
      0x8445, /* AF5 */
      0x8445, /* AF5 */
};

static void __init zylonite_detect_lcd_panel(void)
{
      unsigned long mfpr_save[ARRAY_SIZE(lcd_detect_pins)];
      int i, gpio, id = 0;

      /* save the original MFP settings of these pins and configure them
       * as GPIO Input, DS01X, Pull Neither, Edge Clear
       */
      for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++) {
            mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
            pxa3xx_mfp_write(lcd_detect_pins[i], lcd_detect_mfpr[i]);
      }

      for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
            id = id << 1;
            gpio = mfp_to_gpio(lcd_detect_pins[i]);
            gpio_direction_input(gpio);

            if (gpio_get_value(gpio))
                  id = id | 0x1;
      }

      /* lcd id, flush out bit 1 */
      lcd_id = id & 0x3d;

      /* lcd orientation, portrait or landscape */
      lcd_orientation = (id >> 6) & 0x1;

      /* restore the original MFP settings */
      for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++)
            pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
}

void __init zylonite_pxa320_init(void)
{
      if (cpu_is_pxa320()) {
            /* initialize MFP */
            pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_cfg));

            /* detect LCD panel */
            zylonite_detect_lcd_panel();

            /* GPIO pin assignment */
            gpio_backlight    = mfp_to_gpio(MFP_PIN_GPIO14);
            gpio_eth_irq      = mfp_to_gpio(MFP_PIN_GPIO9);

            /* MMC card detect & write protect for controller 0 */
            zylonite_mmc_slot[0].gpio_cd  = mfp_to_gpio(MFP_PIN_GPIO1);
            zylonite_mmc_slot[0].gpio_wp  = mfp_to_gpio(MFP_PIN_GPIO5);

            /* WM9713 IRQ */
            wm9713_irq = mfp_to_gpio(MFP_PIN_GPIO15);
      }
}

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