arch/arm/mach-mmp/gplugd.c

   1 /*
   2  *  linux/arch/arm/mach-mmp/gplugd.c
   3  *
   4  *  Support for the Marvell PXA168-based GuruPlug Display (gplugD) Platform.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License version 2 as
   8  *  publishhed by the Free Software Foundation.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/gpio.h>
  14
  15 #include <asm/mach/arch.h>
  16 #include <asm/mach-types.h>
  17
  18 #include <mach/irqs.h>
  19 #include <mach/pxa168.h>
  20 #include <mach/mfp-pxa168.h>
  21
  22 #include "common.h"
  23
  24 static unsigned long gplugd_pin_config[] __initdata = {
  25         /* UART3 */
  26         GPIO8_UART3_TXD,
  27         GPIO9_UART3_RXD,
  28         GPIO1O_UART3_CTS,
  29         GPIO11_UART3_RTS,
  30
  31         /* USB OTG PEN */
  32         GPIO18_GPIO,
  33
  34         /* MMC2 */
  35         GPIO28_MMC2_CMD,
  36         GPIO29_MMC2_CLK,
  37         GPIO30_MMC2_DAT0,
  38         GPIO31_MMC2_DAT1,
  39         GPIO32_MMC2_DAT2,
  40         GPIO33_MMC2_DAT3,
  41
  42         /* LCD & HDMI clock selection GPIO: 0: 74.176MHz, 1: 74.25 MHz */
  43         GPIO35_GPIO,
  44         GPIO36_GPIO, /* CEC Interrupt */
  45
  46         /* MMC1 */
  47         GPIO43_MMC1_CLK,
  48         GPIO49_MMC1_CMD,
  49         GPIO41_MMC1_DAT0,
  50         GPIO40_MMC1_DAT1,
  51         GPIO52_MMC1_DAT2,
  52         GPIO51_MMC1_DAT3,
  53         GPIO53_MMC1_CD,
  54
  55         /* LCD */
  56         GPIO56_LCD_FCLK_RD,
  57         GPIO57_LCD_LCLK_A0,
  58         GPIO58_LCD_PCLK_WR,
  59         GPIO59_LCD_DENA_BIAS,
  60         GPIO60_LCD_DD0,
  61         GPIO61_LCD_DD1,
  62         GPIO62_LCD_DD2,
  63         GPIO63_LCD_DD3,
  64         GPIO64_LCD_DD4,
  65         GPIO65_LCD_DD5,
  66         GPIO66_LCD_DD6,
  67         GPIO67_LCD_DD7,
  68         GPIO68_LCD_DD8,
  69         GPIO69_LCD_DD9,
  70         GPIO70_LCD_DD10,
  71         GPIO71_LCD_DD11,
  72         GPIO72_LCD_DD12,
  73         GPIO73_LCD_DD13,
  74         GPIO74_LCD_DD14,
  75         GPIO75_LCD_DD15,
  76         GPIO76_LCD_DD16,
  77         GPIO77_LCD_DD17,
  78         GPIO78_LCD_DD18,
  79         GPIO79_LCD_DD19,
  80         GPIO80_LCD_DD20,
  81         GPIO81_LCD_DD21,
  82         GPIO82_LCD_DD22,
  83         GPIO83_LCD_DD23,
  84
  85         /* GPIO */
  86         GPIO84_GPIO,
  87         GPIO85_GPIO,
  88
  89         /* Fast-Ethernet*/
  90         GPIO86_TX_CLK,
  91         GPIO87_TX_EN,
  92         GPIO88_TX_DQ3,
  93         GPIO89_TX_DQ2,
  94         GPIO90_TX_DQ1,
  95         GPIO91_TX_DQ0,
  96         GPIO92_MII_CRS,
  97         GPIO93_MII_COL,
  98         GPIO94_RX_CLK,
  99         GPIO95_RX_ER,
 100         GPIO96_RX_DQ3,
 101         GPIO97_RX_DQ2,
 102         GPIO98_RX_DQ1,
 103         GPIO99_RX_DQ0,
 104         GPIO100_MII_MDC,
 105         GPIO101_MII_MDIO,
 106         GPIO103_RX_DV,
 107         GPIO104_GPIO,     /* Reset PHY */
 108
 109         /* RTC interrupt */
 110         GPIO102_GPIO,
 111
 112         /* I2C */
 113         GPIO105_CI2C_SDA,
 114         GPIO106_CI2C_SCL,
 115
 116         /* SPI NOR Flash on SSP2 */
 117         GPIO107_SSP2_RXD,
 118         GPIO108_SSP2_TXD,
 119         GPIO110_GPIO,     /* SPI_CSn */
 120         GPIO111_SSP2_CLK,
 121
 122         /* Select JTAG */
 123         GPIO109_GPIO,
 124
 125         /* I2S */
 126         GPIO114_I2S_FRM,
 127         GPIO115_I2S_BCLK,
 128         GPIO116_I2S_TXD
 129 };
 130
 131 static struct i2c_board_info gplugd_i2c_board_info[] = {
 132         {
 133                 .type = "isl1208",
 134                 .addr = 0x6F,
 135         }
 136 };
 137
 138 /* Bring PHY out of reset by setting GPIO 104 */
 139 static int gplugd_eth_init(void)
 140 {
 141         if (unlikely(gpio_request(104, "ETH_RESET_N"))) {
 142                 printk(KERN_ERR "Can't get hold of GPIO 104 to bring Ethernet "
 143                                 "PHY out of reset\n");
 144                 return -EIO;
 145         }
 146
 147         gpio_direction_output(104, 1);
 148         gpio_free(104);
 149         return 0;
 150 }
 151
 152 struct pxa168_eth_platform_data gplugd_eth_platform_data = {
 153         .port_number = 0,
 154         .phy_addr    = 0,
 155         .speed       = 0, /* Autonagotiation */
 156         .init        = gplugd_eth_init,
 157 };
 158
 159 static void __init select_disp_freq(void)
 160 {
 161         /* set GPIO 35 & clear GPIO 85 to set LCD External Clock to 74.25 MHz */
 162         if (unlikely(gpio_request(35, "DISP_FREQ_SEL"))) {
 163                 printk(KERN_ERR "Can't get hold of GPIO 35 to select display "
 164                                 "frequency\n");
 165         } else {
 166                 gpio_direction_output(35, 1);
 167                 gpio_free(35);
 168         }
 169
 170         if (unlikely(gpio_request(85, "DISP_FREQ_SEL_2"))) {
 171                 printk(KERN_ERR "Can't get hold of GPIO 85 to select display "
 172                                 "frequency\n");
 173         } else {
 174                 gpio_direction_output(85, 0);
 175                 gpio_free(85);
 176         }
 177 }
 178
 179 static void __init gplugd_init(void)
 180 {
 181         mfp_config(ARRAY_AND_SIZE(gplugd_pin_config));
 182
 183         select_disp_freq();
 184
 185         /* on-chip devices */
 186         pxa168_add_uart(3);
 187         pxa168_add_ssp(1);
 188         pxa168_add_twsi(0, NULL, ARRAY_AND_SIZE(gplugd_i2c_board_info));
 189         platform_device_register(&pxa168_device_gpio);
 190
 191         pxa168_add_eth(&gplugd_eth_platform_data);
 192 }
 193
 194 MACHINE_START(GPLUGD, "PXA168-based GuruPlug Display (gplugD) Platform")
 195         .map_io         = mmp_map_io,
 196         .nr_irqs        = MMP_NR_IRQS,
 197         .init_irq       = pxa168_init_irq,
 198         .init_time      = pxa168_timer_init,
 199         .init_machine   = gplugd_init,
 200         .restart        = pxa168_restart,
 201 MACHINE_END