kernel/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 #include <linux/gpio-pxa.h>
  15
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach-types.h>
  18
  19 #include <mach/irqs.h>
  20 #include <mach/pxa168.h>
  21 #include <mach/mfp-pxa168.h>
  22
  23 #include "common.h"
  24
  25 static unsigned long gplugd_pin_config[] __initdata = {
  26         /* UART3 */
  27         GPIO8_UART3_TXD,
  28         GPIO9_UART3_RXD,
  29         GPIO1O_UART3_CTS,
  30         GPIO11_UART3_RTS,
  31
  32         /* USB OTG PEN */
  33         GPIO18_GPIO,
  34
  35         /* MMC2 */
  36         GPIO28_MMC2_CMD,
  37         GPIO29_MMC2_CLK,
  38         GPIO30_MMC2_DAT0,
  39         GPIO31_MMC2_DAT1,
  40         GPIO32_MMC2_DAT2,
  41         GPIO33_MMC2_DAT3,
  42
  43         /* LCD & HDMI clock selection GPIO: 0: 74.176MHz, 1: 74.25 MHz */
  44         GPIO35_GPIO,
  45         GPIO36_GPIO, /* CEC Interrupt */
  46
  47         /* MMC1 */
  48         GPIO43_MMC1_CLK,
  49         GPIO49_MMC1_CMD,
  50         GPIO41_MMC1_DAT0,
  51         GPIO40_MMC1_DAT1,
  52         GPIO52_MMC1_DAT2,
  53         GPIO51_MMC1_DAT3,
  54         GPIO53_MMC1_CD,
  55
  56         /* LCD */
  57         GPIO56_LCD_FCLK_RD,
  58         GPIO57_LCD_LCLK_A0,
  59         GPIO58_LCD_PCLK_WR,
  60         GPIO59_LCD_DENA_BIAS,
  61         GPIO60_LCD_DD0,
  62         GPIO61_LCD_DD1,
  63         GPIO62_LCD_DD2,
  64         GPIO63_LCD_DD3,
  65         GPIO64_LCD_DD4,
  66         GPIO65_LCD_DD5,
  67         GPIO66_LCD_DD6,
  68         GPIO67_LCD_DD7,
  69         GPIO68_LCD_DD8,
  70         GPIO69_LCD_DD9,
  71         GPIO70_LCD_DD10,
  72         GPIO71_LCD_DD11,
  73         GPIO72_LCD_DD12,
  74         GPIO73_LCD_DD13,
  75         GPIO74_LCD_DD14,
  76         GPIO75_LCD_DD15,
  77         GPIO76_LCD_DD16,
  78         GPIO77_LCD_DD17,
  79         GPIO78_LCD_DD18,
  80         GPIO79_LCD_DD19,
  81         GPIO80_LCD_DD20,
  82         GPIO81_LCD_DD21,
  83         GPIO82_LCD_DD22,
  84         GPIO83_LCD_DD23,
  85
  86         /* GPIO */
  87         GPIO84_GPIO,
  88         GPIO85_GPIO,
  89
  90         /* Fast-Ethernet*/
  91         GPIO86_TX_CLK,
  92         GPIO87_TX_EN,
  93         GPIO88_TX_DQ3,
  94         GPIO89_TX_DQ2,
  95         GPIO90_TX_DQ1,
  96         GPIO91_TX_DQ0,
  97         GPIO92_MII_CRS,
  98         GPIO93_MII_COL,
  99         GPIO94_RX_CLK,
 100         GPIO95_RX_ER,
 101         GPIO96_RX_DQ3,
 102         GPIO97_RX_DQ2,
 103         GPIO98_RX_DQ1,
 104         GPIO99_RX_DQ0,
 105         GPIO100_MII_MDC,
 106         GPIO101_MII_MDIO,
 107         GPIO103_RX_DV,
 108         GPIO104_GPIO,     /* Reset PHY */
 109
 110         /* RTC interrupt */
 111         GPIO102_GPIO,
 112
 113         /* I2C */
 114         GPIO105_CI2C_SDA,
 115         GPIO106_CI2C_SCL,
 116
 117         /* SPI NOR Flash on SSP2 */
 118         GPIO107_SSP2_RXD,
 119         GPIO108_SSP2_TXD,
 120         GPIO110_GPIO,     /* SPI_CSn */
 121         GPIO111_SSP2_CLK,
 122
 123         /* Select JTAG */
 124         GPIO109_GPIO,
 125
 126         /* I2S */
 127         GPIO114_I2S_FRM,
 128         GPIO115_I2S_BCLK,
 129         GPIO116_I2S_TXD
 130 };
 131
 132 static struct pxa_gpio_platform_data pxa168_gpio_pdata = {
 133         .irq_base       = MMP_GPIO_TO_IRQ(0),
 134 };
 135
 136 static struct i2c_board_info gplugd_i2c_board_info[] = {
 137         {
 138                 .type = "isl1208",
 139                 .addr = 0x6F,
 140         }
 141 };
 142
 143 /* Bring PHY out of reset by setting GPIO 104 */
 144 static int gplugd_eth_init(void)
 145 {
 146         if (unlikely(gpio_request(104, "ETH_RESET_N"))) {
 147                 printk(KERN_ERR "Can't get hold of GPIO 104 to bring Ethernet "
 148                                 "PHY out of reset\n");
 149                 return -EIO;
 150         }
 151
 152         gpio_direction_output(104, 1);
 153         gpio_free(104);
 154         return 0;
 155 }
 156
 157 struct pxa168_eth_platform_data gplugd_eth_platform_data = {
 158         .port_number = 0,
 159         .phy_addr    = 0,
 160         .speed       = 0, /* Autonagotiation */
 161         .intf        = PHY_INTERFACE_MODE_RMII,
 162         .init        = gplugd_eth_init,
 163 };
 164
 165 static void __init select_disp_freq(void)
 166 {
 167         /* set GPIO 35 & clear GPIO 85 to set LCD External Clock to 74.25 MHz */
 168         if (unlikely(gpio_request(35, "DISP_FREQ_SEL"))) {
 169                 printk(KERN_ERR "Can't get hold of GPIO 35 to select display "
 170                                 "frequency\n");
 171         } else {
 172                 gpio_direction_output(35, 1);
 173                 gpio_free(35);
 174         }
 175
 176         if (unlikely(gpio_request(85, "DISP_FREQ_SEL_2"))) {
 177                 printk(KERN_ERR "Can't get hold of GPIO 85 to select display "
 178                                 "frequency\n");
 179         } else {
 180                 gpio_direction_output(85, 0);
 181                 gpio_free(85);
 182         }
 183 }
 184
 185 static void __init gplugd_init(void)
 186 {
 187         mfp_config(ARRAY_AND_SIZE(gplugd_pin_config));
 188
 189         select_disp_freq();
 190
 191         /* on-chip devices */
 192         pxa168_add_uart(3);
 193         pxa168_add_ssp(1);
 194         pxa168_add_twsi(0, NULL, ARRAY_AND_SIZE(gplugd_i2c_board_info));
 195         platform_device_add_data(&pxa168_device_gpio, &pxa168_gpio_pdata,
 196                                  sizeof(struct pxa_gpio_platform_data));
 197         platform_device_register(&pxa168_device_gpio);
 198
 199         pxa168_add_eth(&gplugd_eth_platform_data);
 200 }
 201
 202 MACHINE_START(GPLUGD, "PXA168-based GuruPlug Display (gplugD) Platform")
 203         .map_io         = mmp_map_io,
 204         .nr_irqs        = MMP_NR_IRQS,
 205         .init_irq       = pxa168_init_irq,
 206         .init_time      = pxa168_timer_init,
 207         .init_machine   = gplugd_init,
 208         .restart        = pxa168_restart,
 209 MACHINE_END