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alistair23-linux/arch/arm/mach-pxa/zylonite_pxa320.c
Eric Miao 15fbc93857 [ARM] pxa/zylonite: fix the issue of unused SDATA_IN_1 pin get AC97 not working 
GPIO17_SDATA_IN_1 and GPIO36_SDATA_IN_1 are originally designed for the 2nd
codec but unused on the board, yet they are initialized incorrectly by the
bootloader as the SDATA_IN_1 alternate function, thus causing AC97 fail to
work. Fix this issue by configuring these pins as normal GPIO to avoid the
noise from these pins being treated as signals from the 2nd codec.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
2009-04-27 11:46:30 +08:00

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/*
* 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 <linux/gpio.h>
#include <mach/pxa320.h>
#include <mach/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,
GPIO14_PWM3_OUT, /* backlight */
/* 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,
GPIO36_GPIO, /* SDATA_IN_1 but unused - configure to GPIO */
/* SSP3 */
GPIO89_SSP3_SCLK,
GPIO90_SSP3_FRM,
GPIO91_SSP3_TXD,
GPIO92_SSP3_RXD,
/* 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,
/* USB Host */
GPIO2_2_USBH_PEN,
GPIO3_2_USBH_PWR,
/* Debug LEDs */
GPIO1_2_GPIO | MFP_LPM_DRIVE_HIGH,
GPIO4_2_GPIO | MFP_LPM_DRIVE_HIGH,
};
#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_eth_irq = mfp_to_gpio(MFP_PIN_GPIO9);
gpio_debug_led1 = mfp_to_gpio(MFP_PIN_GPIO1_2);
gpio_debug_led2 = mfp_to_gpio(MFP_PIN_GPIO4_2);
/* 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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