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

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * linux/arch/arm/mach-pxa/zylonite_pxa320.c
   4 *
   5 * PXA320 specific support code for the
   6 * PXA3xx Development Platform (aka Zylonite)
   7 *
   8 * Copyright (C) 2007 Marvell Internation Ltd.
   9 * 2007-08-21: eric miao <eric.miao@marvell.com>
  10 *             initial version
  11 */
  12
  13#include <linux/module.h>
  14#include <linux/kernel.h>
  15#include <linux/init.h>
  16#include <linux/gpio.h>
  17
  18#include "pxa320.h"
  19#include "zylonite.h"
  20
  21#include "generic.h"
  22
  23static mfp_cfg_t mfp_cfg[] __initdata = {
  24        /* LCD */
  25        GPIO6_2_LCD_LDD_0,
  26        GPIO7_2_LCD_LDD_1,
  27        GPIO8_2_LCD_LDD_2,
  28        GPIO9_2_LCD_LDD_3,
  29        GPIO10_2_LCD_LDD_4,
  30        GPIO11_2_LCD_LDD_5,
  31        GPIO12_2_LCD_LDD_6,
  32        GPIO13_2_LCD_LDD_7,
  33        GPIO63_LCD_LDD_8,
  34        GPIO64_LCD_LDD_9,
  35        GPIO65_LCD_LDD_10,
  36        GPIO66_LCD_LDD_11,
  37        GPIO67_LCD_LDD_12,
  38        GPIO68_LCD_LDD_13,
  39        GPIO69_LCD_LDD_14,
  40        GPIO70_LCD_LDD_15,
  41        GPIO71_LCD_LDD_16,
  42        GPIO72_LCD_LDD_17,
  43        GPIO73_LCD_CS_N,
  44        GPIO74_LCD_VSYNC,
  45        GPIO14_2_LCD_FCLK,
  46        GPIO15_2_LCD_LCLK,
  47        GPIO16_2_LCD_PCLK,
  48        GPIO17_2_LCD_BIAS,
  49        GPIO14_PWM3_OUT,        /* backlight */
  50
  51        /* FFUART */
  52        GPIO41_UART1_RXD | MFP_LPM_EDGE_FALL,
  53        GPIO42_UART1_TXD,
  54        GPIO43_UART1_CTS,
  55        GPIO44_UART1_DCD,
  56        GPIO45_UART1_DSR | MFP_LPM_EDGE_FALL,
  57        GPIO46_UART1_RI,
  58        GPIO47_UART1_DTR,
  59        GPIO48_UART1_RTS,
  60
  61        /* AC97 */
  62        GPIO34_AC97_SYSCLK,
  63        GPIO35_AC97_SDATA_IN_0,
  64        GPIO37_AC97_SDATA_OUT,
  65        GPIO38_AC97_SYNC,
  66        GPIO39_AC97_BITCLK,
  67        GPIO40_AC97_nACRESET,
  68        GPIO36_GPIO,    /* SDATA_IN_1 but unused - configure to GPIO */
  69
  70        /* SSP3 */
  71        GPIO89_SSP3_SCLK,
  72        GPIO90_SSP3_FRM,
  73        GPIO91_SSP3_TXD,
  74        GPIO92_SSP3_RXD,
  75
  76        /* WM9713 IRQ */
  77        GPIO15_GPIO,
  78
  79        /* I2C */
  80        GPIO32_I2C_SCL,
  81        GPIO33_I2C_SDA,
  82
  83        /* Keypad */
  84        GPIO105_KP_DKIN_0 | MFP_LPM_EDGE_BOTH,
  85        GPIO106_KP_DKIN_1 | MFP_LPM_EDGE_BOTH,
  86        GPIO113_KP_MKIN_0 | MFP_LPM_EDGE_BOTH,
  87        GPIO114_KP_MKIN_1 | MFP_LPM_EDGE_BOTH,
  88        GPIO115_KP_MKIN_2 | MFP_LPM_EDGE_BOTH,
  89        GPIO116_KP_MKIN_3 | MFP_LPM_EDGE_BOTH,
  90        GPIO117_KP_MKIN_4 | MFP_LPM_EDGE_BOTH,
  91        GPIO118_KP_MKIN_5 | MFP_LPM_EDGE_BOTH,
  92        GPIO119_KP_MKIN_6 | MFP_LPM_EDGE_BOTH,
  93        GPIO120_KP_MKIN_7 | MFP_LPM_EDGE_BOTH,
  94        GPIO121_KP_MKOUT_0,
  95        GPIO122_KP_MKOUT_1,
  96        GPIO123_KP_MKOUT_2,
  97        GPIO124_KP_MKOUT_3,
  98        GPIO125_KP_MKOUT_4,
  99        GPIO126_KP_MKOUT_5,
 100        GPIO127_KP_MKOUT_6,
 101        GPIO5_2_KP_MKOUT_7,
 102
 103        /* Ethernet */
 104        GPIO4_nCS3,
 105        GPIO90_GPIO,
 106
 107        /* MMC1 */
 108        GPIO18_MMC1_DAT0,
 109        GPIO19_MMC1_DAT1 | MFP_LPM_EDGE_BOTH,
 110        GPIO20_MMC1_DAT2,
 111        GPIO21_MMC1_DAT3,
 112        GPIO22_MMC1_CLK,
 113        GPIO23_MMC1_CMD,/* CMD0 for slot 0 */
 114        GPIO31_GPIO,    /* CMD1 default as GPIO for slot 0 */
 115
 116        /* MMC2 */
 117        GPIO24_MMC2_DAT0,
 118        GPIO25_MMC2_DAT1 | MFP_LPM_EDGE_BOTH,
 119        GPIO26_MMC2_DAT2,
 120        GPIO27_MMC2_DAT3,
 121        GPIO28_MMC2_CLK,
 122        GPIO29_MMC2_CMD,
 123
 124        /* USB Host */
 125        GPIO2_2_USBH_PEN,
 126        GPIO3_2_USBH_PWR,
 127
 128        /* Debug LEDs */
 129        GPIO1_2_GPIO | MFP_LPM_DRIVE_HIGH,
 130        GPIO4_2_GPIO | MFP_LPM_DRIVE_HIGH,
 131};
 132
 133#define NUM_LCD_DETECT_PINS     7
 134
 135static int lcd_detect_pins[] __initdata = {
 136        MFP_PIN_GPIO72,   /* LCD_LDD_17 - ORIENT */
 137        MFP_PIN_GPIO71,   /* LCD_LDD_16 - LCDID[5] */
 138        MFP_PIN_GPIO17_2, /* LCD_BIAS   - LCDID[4] */
 139        MFP_PIN_GPIO15_2, /* LCD_LCLK   - LCDID[3] */
 140        MFP_PIN_GPIO14_2, /* LCD_FCLK   - LCDID[2] */
 141        MFP_PIN_GPIO73,   /* LCD_CS_N   - LCDID[1] */
 142        MFP_PIN_GPIO74,   /* LCD_VSYNC  - LCDID[0] */
 143        /*
 144         * set the MFP_PIN_GPIO 14/15/17 to alternate function other than
 145         * GPIO to avoid input level confliction with 14_2, 15_2, 17_2
 146         */
 147        MFP_PIN_GPIO14,
 148        MFP_PIN_GPIO15,
 149        MFP_PIN_GPIO17,
 150};
 151
 152static int lcd_detect_mfpr[] __initdata = {
 153        /* AF0, DS 1X, Pull Neither, Edge Clear */
 154        0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440,
 155        0xc442, /* Backlight, Pull-Up, AF2 */
 156        0x8445, /* AF5 */
 157        0x8445, /* AF5 */
 158};
 159
 160static void __init zylonite_detect_lcd_panel(void)
 161{
 162        unsigned long mfpr_save[ARRAY_SIZE(lcd_detect_pins)];
 163        int i, gpio, id = 0;
 164
 165        /* save the original MFP settings of these pins and configure them
 166         * as GPIO Input, DS01X, Pull Neither, Edge Clear
 167         */
 168        for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++) {
 169                mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
 170                pxa3xx_mfp_write(lcd_detect_pins[i], lcd_detect_mfpr[i]);
 171        }
 172
 173        for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
 174                id = id << 1;
 175                gpio = mfp_to_gpio(lcd_detect_pins[i]);
 176                gpio_request(gpio, "LCD_ID_PINS");
 177                gpio_direction_input(gpio);
 178
 179                if (gpio_get_value(gpio))
 180                        id = id | 0x1;
 181                gpio_free(gpio);
 182        }
 183
 184        /* lcd id, flush out bit 1 */
 185        lcd_id = id & 0x3d;
 186
 187        /* lcd orientation, portrait or landscape */
 188        lcd_orientation = (id >> 6) & 0x1;
 189
 190        /* restore the original MFP settings */
 191        for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++)
 192                pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
 193}
 194
 195void __init zylonite_pxa320_init(void)
 196{
 197        if (cpu_is_pxa320()) {
 198                /* initialize MFP */
 199                pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_cfg));
 200
 201                /* detect LCD panel */
 202                zylonite_detect_lcd_panel();
 203
 204                /* GPIO pin assignment */
 205                gpio_eth_irq    = mfp_to_gpio(MFP_PIN_GPIO9);
 206                gpio_debug_led1 = mfp_to_gpio(MFP_PIN_GPIO1_2);
 207                gpio_debug_led2 = mfp_to_gpio(MFP_PIN_GPIO4_2);
 208
 209                /* WM9713 IRQ */
 210                wm9713_irq = mfp_to_gpio(MFP_PIN_GPIO15);
 211        }
 212}
 213