root/arch/arm/mach-pxa/zylonite_pxa320.c

DEFINITIONS

1. zylonite_detect_lcd_panel
2. zylonite_pxa320_init

   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 
  23 static 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 
 135 static 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 
 152 static 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 
 160 static 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 
 195 void __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 }