root/arch/arm/mach-pxa/zylonite_pxa300.c

DEFINITIONS

1. zylonite_detect_lcd_panel
2. zylonite_init_i2c
3. zylonite_init_i2c
4. zylonite_pxa300_init

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/arch/arm/mach-pxa/zylonite_pxa300.c
   4  *
   5  * PXA300/PXA310 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/i2c.h>
  17 #include <linux/platform_data/i2c-pxa.h>
  18 #include <linux/platform_data/pca953x.h>
  19 #include <linux/gpio.h>
  20 
  21 #include "pxa300.h"
  22 #include "devices.h"
  23 #include "zylonite.h"
  24 
  25 #include "generic.h"
  26 
  27 /* PXA300/PXA310 common configurations */
  28 static mfp_cfg_t common_mfp_cfg[] __initdata = {
  29         /* LCD */
  30         GPIO54_LCD_LDD_0,
  31         GPIO55_LCD_LDD_1,
  32         GPIO56_LCD_LDD_2,
  33         GPIO57_LCD_LDD_3,
  34         GPIO58_LCD_LDD_4,
  35         GPIO59_LCD_LDD_5,
  36         GPIO60_LCD_LDD_6,
  37         GPIO61_LCD_LDD_7,
  38         GPIO62_LCD_LDD_8,
  39         GPIO63_LCD_LDD_9,
  40         GPIO64_LCD_LDD_10,
  41         GPIO65_LCD_LDD_11,
  42         GPIO66_LCD_LDD_12,
  43         GPIO67_LCD_LDD_13,
  44         GPIO68_LCD_LDD_14,
  45         GPIO69_LCD_LDD_15,
  46         GPIO70_LCD_LDD_16,
  47         GPIO71_LCD_LDD_17,
  48         GPIO72_LCD_FCLK,
  49         GPIO73_LCD_LCLK,
  50         GPIO74_LCD_PCLK,
  51         GPIO75_LCD_BIAS,
  52         GPIO76_LCD_VSYNC,
  53         GPIO127_LCD_CS_N,
  54         GPIO20_PWM3_OUT,        /* backlight */
  55 
  56         /* BTUART */
  57         GPIO111_UART2_RTS,
  58         GPIO112_UART2_RXD | MFP_LPM_EDGE_FALL,
  59         GPIO113_UART2_TXD,
  60         GPIO114_UART2_CTS | MFP_LPM_EDGE_BOTH,
  61 
  62         /* STUART */
  63         GPIO109_UART3_TXD,
  64         GPIO110_UART3_RXD | MFP_LPM_EDGE_FALL,
  65 
  66         /* AC97 */
  67         GPIO23_AC97_nACRESET,
  68         GPIO24_AC97_SYSCLK,
  69         GPIO29_AC97_BITCLK,
  70         GPIO25_AC97_SDATA_IN_0,
  71         GPIO27_AC97_SDATA_OUT,
  72         GPIO28_AC97_SYNC,
  73         GPIO17_GPIO,    /* SDATA_IN_1 but unused - configure to GPIO */
  74 
  75         /* SSP3 */
  76         GPIO91_SSP3_SCLK,
  77         GPIO92_SSP3_FRM,
  78         GPIO93_SSP3_TXD,
  79         GPIO94_SSP3_RXD,
  80 
  81         /* WM9713 IRQ */
  82         GPIO26_GPIO,
  83 
  84         /* Keypad */
  85         GPIO107_KP_DKIN_0 | MFP_LPM_EDGE_BOTH,
  86         GPIO108_KP_DKIN_1 | MFP_LPM_EDGE_BOTH,
  87         GPIO115_KP_MKIN_0 | MFP_LPM_EDGE_BOTH,
  88         GPIO116_KP_MKIN_1 | MFP_LPM_EDGE_BOTH,
  89         GPIO117_KP_MKIN_2 | MFP_LPM_EDGE_BOTH,
  90         GPIO118_KP_MKIN_3 | MFP_LPM_EDGE_BOTH,
  91         GPIO119_KP_MKIN_4 | MFP_LPM_EDGE_BOTH,
  92         GPIO120_KP_MKIN_5 | MFP_LPM_EDGE_BOTH,
  93         GPIO2_2_KP_MKIN_6 | MFP_LPM_EDGE_BOTH,
  94         GPIO3_2_KP_MKIN_7 | MFP_LPM_EDGE_BOTH,
  95         GPIO121_KP_MKOUT_0,
  96         GPIO122_KP_MKOUT_1,
  97         GPIO123_KP_MKOUT_2,
  98         GPIO124_KP_MKOUT_3,
  99         GPIO125_KP_MKOUT_4,
 100         GPIO4_2_KP_MKOUT_5,
 101         GPIO5_2_KP_MKOUT_6,
 102         GPIO6_2_KP_MKOUT_7,
 103 
 104         /* MMC1 */
 105         GPIO3_MMC1_DAT0,
 106         GPIO4_MMC1_DAT1 | MFP_LPM_EDGE_BOTH,
 107         GPIO5_MMC1_DAT2,
 108         GPIO6_MMC1_DAT3,
 109         GPIO7_MMC1_CLK,
 110         GPIO8_MMC1_CMD, /* CMD0 for slot 0 */
 111         GPIO15_GPIO,    /* CMD1 default as GPIO for slot 0 */
 112 
 113         /* MMC2 */
 114         GPIO9_MMC2_DAT0,
 115         GPIO10_MMC2_DAT1 | MFP_LPM_EDGE_BOTH,
 116         GPIO11_MMC2_DAT2,
 117         GPIO12_MMC2_DAT3,
 118         GPIO13_MMC2_CLK,
 119         GPIO14_MMC2_CMD,
 120 
 121         /* USB Host */
 122         GPIO0_2_USBH_PEN,
 123         GPIO1_2_USBH_PWR,
 124 
 125         /* Standard I2C */
 126         GPIO21_I2C_SCL,
 127         GPIO22_I2C_SDA,
 128 
 129         /* GPIO */
 130         GPIO18_GPIO | MFP_PULL_HIGH,    /* GPIO Expander #0 INT_N */
 131         GPIO19_GPIO | MFP_PULL_HIGH,    /* GPIO Expander #1 INT_N */
 132 };
 133 
 134 static mfp_cfg_t pxa300_mfp_cfg[] __initdata = {
 135         /* FFUART */
 136         GPIO30_UART1_RXD | MFP_LPM_EDGE_FALL,
 137         GPIO31_UART1_TXD,
 138         GPIO32_UART1_CTS,
 139         GPIO37_UART1_RTS,
 140         GPIO33_UART1_DCD,
 141         GPIO34_UART1_DSR | MFP_LPM_EDGE_FALL,
 142         GPIO35_UART1_RI,
 143         GPIO36_UART1_DTR,
 144 
 145         /* Ethernet */
 146         GPIO2_nCS3,
 147         GPIO99_GPIO,
 148 };
 149 
 150 static mfp_cfg_t pxa310_mfp_cfg[] __initdata = {
 151         /* FFUART */
 152         GPIO99_UART1_RXD | MFP_LPM_EDGE_FALL,
 153         GPIO100_UART1_TXD,
 154         GPIO101_UART1_CTS,
 155         GPIO106_UART1_RTS,
 156 
 157         /* Ethernet */
 158         GPIO2_nCS3,
 159         GPIO102_GPIO,
 160 
 161         /* MMC3 */
 162         GPIO7_2_MMC3_DAT0,
 163         GPIO8_2_MMC3_DAT1 | MFP_LPM_EDGE_BOTH,
 164         GPIO9_2_MMC3_DAT2,
 165         GPIO10_2_MMC3_DAT3,
 166         GPIO103_MMC3_CLK,
 167         GPIO105_MMC3_CMD,
 168 };
 169 
 170 #define NUM_LCD_DETECT_PINS     7
 171 
 172 static int lcd_detect_pins[] __initdata = {
 173         MFP_PIN_GPIO71, /* LCD_LDD_17 - ORIENT */
 174         MFP_PIN_GPIO70, /* LCD_LDD_16 - LCDID[5] */
 175         MFP_PIN_GPIO75, /* LCD_BIAS   - LCDID[4] */
 176         MFP_PIN_GPIO73, /* LCD_LCLK   - LCDID[3] */
 177         MFP_PIN_GPIO72, /* LCD_FCLK   - LCDID[2] */
 178         MFP_PIN_GPIO127,/* LCD_CS_N   - LCDID[1] */
 179         MFP_PIN_GPIO76, /* LCD_VSYNC  - LCDID[0] */
 180 };
 181 
 182 static void __init zylonite_detect_lcd_panel(void)
 183 {
 184         unsigned long mfpr_save[NUM_LCD_DETECT_PINS];
 185         int i, gpio, id = 0;
 186 
 187         /* save the original MFP settings of these pins and configure
 188          * them as GPIO Input, DS01X, Pull Neither, Edge Clear
 189          */
 190         for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
 191                 mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
 192                 pxa3xx_mfp_write(lcd_detect_pins[i], 0x8440);
 193         }
 194 
 195         for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
 196                 id = id << 1;
 197                 gpio = mfp_to_gpio(lcd_detect_pins[i]);
 198                 gpio_request(gpio, "LCD_ID_PINS");
 199                 gpio_direction_input(gpio);
 200 
 201                 if (gpio_get_value(gpio))
 202                         id = id | 0x1;
 203                 gpio_free(gpio);
 204         }
 205 
 206         /* lcd id, flush out bit 1 */
 207         lcd_id = id & 0x3d;
 208 
 209         /* lcd orientation, portrait or landscape */
 210         lcd_orientation = (id >> 6) & 0x1;
 211 
 212         /* restore the original MFP settings */
 213         for (i = 0; i < NUM_LCD_DETECT_PINS; i++)
 214                 pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
 215 }
 216 
 217 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 218 static struct pca953x_platform_data gpio_exp[] = {
 219         [0] = {
 220                 .gpio_base      = 128,
 221         },
 222         [1] = {
 223                 .gpio_base      = 144,
 224         },
 225 };
 226 
 227 static struct i2c_board_info zylonite_i2c_board_info[] = {
 228         {
 229                 .type           = "pca9539",
 230                 .dev_name       = "pca9539-a",
 231                 .addr           = 0x74,
 232                 .platform_data  = &gpio_exp[0],
 233                 .irq            = PXA_GPIO_TO_IRQ(18),
 234         }, {
 235                 .type           = "pca9539",
 236                 .dev_name       = "pca9539-b",
 237                 .addr           = 0x75,
 238                 .platform_data  = &gpio_exp[1],
 239                 .irq            = PXA_GPIO_TO_IRQ(19),
 240         },
 241 };
 242 
 243 static void __init zylonite_init_i2c(void)
 244 {
 245         pxa_set_i2c_info(NULL);
 246         i2c_register_board_info(0, ARRAY_AND_SIZE(zylonite_i2c_board_info));
 247 }
 248 #else
 249 static inline void zylonite_init_i2c(void) {}
 250 #endif
 251 
 252 void __init zylonite_pxa300_init(void)
 253 {
 254         if (cpu_is_pxa300() || cpu_is_pxa310()) {
 255                 /* initialize MFP */
 256                 pxa3xx_mfp_config(ARRAY_AND_SIZE(common_mfp_cfg));
 257 
 258                 /* detect LCD panel */
 259                 zylonite_detect_lcd_panel();
 260 
 261                 /* WM9713 IRQ */
 262                 wm9713_irq = mfp_to_gpio(MFP_PIN_GPIO26);
 263 
 264                 zylonite_init_i2c();
 265         }
 266 
 267         if (cpu_is_pxa300()) {
 268                 pxa3xx_mfp_config(ARRAY_AND_SIZE(pxa300_mfp_cfg));
 269                 gpio_eth_irq = mfp_to_gpio(MFP_PIN_GPIO99);
 270         }
 271 
 272         if (cpu_is_pxa310()) {
 273                 pxa3xx_mfp_config(ARRAY_AND_SIZE(pxa310_mfp_cfg));
 274                 gpio_eth_irq = mfp_to_gpio(MFP_PIN_GPIO102);
 275         }
 276 
 277         /* GPIOs for Debug LEDs */
 278         gpio_debug_led1 = EXT_GPIO(25);
 279         gpio_debug_led2 = EXT_GPIO(26);
 280 }