arch/arm/mach-mx5/board-mx51_efikamx.c

   1 /*
   2  * Copyright (C) 2010 Linaro Limited
   3  *
   4  * based on code from the following
   5  * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
   6  * Copyright 2009-2010 Pegatron Corporation. All Rights Reserved.
   7  * Copyright 2009-2010 Genesi USA, Inc. All Rights Reserved.
   8  *
   9  * The code contained herein is licensed under the GNU General Public
  10  * License. You may obtain a copy of the GNU General Public License
  11  * Version 2 or later at the following locations:
  12  *
  13  * http://www.opensource.org/licenses/gpl-license.html
  14  * http://www.gnu.org/copyleft/gpl.html
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/i2c.h>
  20 #include <linux/gpio.h>
  21 #include <linux/leds.h>
  22 #include <linux/input.h>
  23 #include <linux/delay.h>
  24 #include <linux/io.h>
  25 #include <linux/fsl_devices.h>
  26 #include <linux/spi/flash.h>
  27 #include <linux/spi/spi.h>
  28 #include <linux/mfd/mc13892.h>
  29 #include <linux/regulator/machine.h>
  30 #include <linux/regulator/consumer.h>
  31
  32 #include <mach/common.h>
  33 #include <mach/hardware.h>
  34 #include <mach/iomux-mx51.h>
  35 #include <mach/i2c.h>
  36 #include <mach/mxc_ehci.h>
  37
  38 #include <asm/irq.h>
  39 #include <asm/setup.h>
  40 #include <asm/mach-types.h>
  41 #include <asm/mach/arch.h>
  42 #include <asm/mach/time.h>
  43
  44 #include "devices-imx51.h"
  45 #include "devices.h"
  46 #include "efika.h"
  47
  48 #define EFIKAMX_PCBID0          IMX_GPIO_NR(3, 16)
  49 #define EFIKAMX_PCBID1          IMX_GPIO_NR(3, 17)
  50 #define EFIKAMX_PCBID2          IMX_GPIO_NR(3, 11)
  51
  52 #define EFIKAMX_BLUE_LED        IMX_GPIO_NR(3, 13)
  53 #define EFIKAMX_GREEN_LED       IMX_GPIO_NR(3, 14)
  54 #define EFIKAMX_RED_LED         IMX_GPIO_NR(3, 15)
  55
  56 #define EFIKAMX_POWER_KEY       IMX_GPIO_NR(2, 31)
  57
  58 /* board 1.1 doesn't have same reset gpio */
  59 #define EFIKAMX_RESET1_1        IMX_GPIO_NR(3, 2)
  60 #define EFIKAMX_RESET           IMX_GPIO_NR(1, 4)
  61
  62 #define EFIKAMX_POWEROFF        IMX_GPIO_NR(4, 13)
  63
  64 #define EFIKAMX_PMIC            IMX_GPIO_NR(1, 6)
  65
  66 /* the pci ids pin have pull up. they're driven low according to board id */
  67 #define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  68 #define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  69 #define MX51_PAD_PCBID2 IOMUX_PAD(0x504, 0x128, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  70 #define MX51_PAD_PWRKEY IOMUX_PAD(0x48c, 0x0f8, 1, 0x0,   0, PAD_CTL_PUS_100K_UP | PAD_CTL_PKE)
  71
  72 static iomux_v3_cfg_t mx51efikamx_pads[] = {
  73         /* board id */
  74         MX51_PAD_PCBID0,
  75         MX51_PAD_PCBID1,
  76         MX51_PAD_PCBID2,
  77
  78         /* leds */
  79         MX51_PAD_CSI1_D9__GPIO3_13,
  80         MX51_PAD_CSI1_VSYNC__GPIO3_14,
  81         MX51_PAD_CSI1_HSYNC__GPIO3_15,
  82
  83         /* power key */
  84         MX51_PAD_PWRKEY,
  85
  86         /* reset */
  87         MX51_PAD_DI1_PIN13__GPIO3_2,
  88         MX51_PAD_GPIO1_4__GPIO1_4,
  89
  90         /* power off */
  91         MX51_PAD_CSI2_VSYNC__GPIO4_13,
  92 };
  93
  94 /*   PCBID2  PCBID1 PCBID0  STATE
  95         1       1      1    ER1:rev1.1
  96         1       1      0    ER2:rev1.2
  97         1       0      1    ER3:rev1.3
  98         1       0      0    ER4:rev1.4
  99 */
 100 static void __init mx51_efikamx_board_id(void)
 101 {
 102         int id;
 103
 104         /* things are taking time to settle */
 105         msleep(150);
 106
 107         gpio_request(EFIKAMX_PCBID0, "pcbid0");
 108         gpio_direction_input(EFIKAMX_PCBID0);
 109         gpio_request(EFIKAMX_PCBID1, "pcbid1");
 110         gpio_direction_input(EFIKAMX_PCBID1);
 111         gpio_request(EFIKAMX_PCBID2, "pcbid2");
 112         gpio_direction_input(EFIKAMX_PCBID2);
 113
 114         id = gpio_get_value(EFIKAMX_PCBID0);
 115         id |= gpio_get_value(EFIKAMX_PCBID1) << 1;
 116         id |= gpio_get_value(EFIKAMX_PCBID2) << 2;
 117
 118         switch (id) {
 119         case 7:
 120                 system_rev = 0x11;
 121                 break;
 122         case 6:
 123                 system_rev = 0x12;
 124                 break;
 125         case 5:
 126                 system_rev = 0x13;
 127                 break;
 128         case 4:
 129                 system_rev = 0x14;
 130                 break;
 131         default:
 132                 system_rev = 0x10;
 133                 break;
 134         }
 135
 136         if ((system_rev == 0x10)
 137                 || (system_rev == 0x12)
 138                 || (system_rev == 0x14)) {
 139                 printk(KERN_WARNING
 140                         "EfikaMX: Unsupported board revision 1.%u!\n",
 141                         system_rev & 0xf);
 142         }
 143 }
 144
 145 static struct gpio_led mx51_efikamx_leds[] = {
 146         {
 147                 .name = "efikamx:green",
 148                 .default_trigger = "default-on",
 149                 .gpio = EFIKAMX_GREEN_LED,
 150         },
 151         {
 152                 .name = "efikamx:red",
 153                 .default_trigger = "ide-disk",
 154                 .gpio = EFIKAMX_RED_LED,
 155         },
 156         {
 157                 .name = "efikamx:blue",
 158                 .default_trigger = "mmc0",
 159                 .gpio = EFIKAMX_BLUE_LED,
 160         },
 161 };
 162
 163 static struct gpio_led_platform_data mx51_efikamx_leds_data = {
 164         .leds = mx51_efikamx_leds,
 165         .num_leds = ARRAY_SIZE(mx51_efikamx_leds),
 166 };
 167
 168 static struct platform_device mx51_efikamx_leds_device = {
 169         .name = "leds-gpio",
 170         .id = -1,
 171         .dev = {
 172                 .platform_data = &mx51_efikamx_leds_data,
 173         },
 174 };
 175
 176 static struct gpio_keys_button mx51_efikamx_powerkey[] = {
 177         {
 178                 .code = KEY_POWER,
 179                 .gpio = EFIKAMX_POWER_KEY,
 180                 .type = EV_PWR,
 181                 .desc = "Power Button (CM)",
 182                 .wakeup = 1,
 183                 .debounce_interval = 10, /* ms */
 184         },
 185 };
 186
 187 static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
 188         .buttons = mx51_efikamx_powerkey,
 189         .nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
 190 };
 191
 192 void mx51_efikamx_reset(void)
 193 {
 194         if (system_rev == 0x11)
 195                 gpio_direction_output(EFIKAMX_RESET1_1, 0);
 196         else
 197                 gpio_direction_output(EFIKAMX_RESET, 0);
 198 }
 199
 200 static struct regulator *pwgt1, *pwgt2, *coincell;
 201
 202 static void mx51_efikamx_power_off(void)
 203 {
 204         if (!IS_ERR(coincell))
 205                 regulator_disable(coincell);
 206
 207         if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
 208                 regulator_disable(pwgt2);
 209                 regulator_disable(pwgt1);
 210         }
 211         gpio_direction_output(EFIKAMX_POWEROFF, 1);
 212 }
 213
 214 static int __init mx51_efikamx_power_init(void)
 215 {
 216         if (machine_is_mx51_efikamx()) {
 217                 pwgt1 = regulator_get(NULL, "pwgt1");
 218                 pwgt2 = regulator_get(NULL, "pwgt2");
 219                 if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
 220                         regulator_enable(pwgt1);
 221                         regulator_enable(pwgt2);
 222                 }
 223                 gpio_request(EFIKAMX_POWEROFF, "poweroff");
 224                 pm_power_off = mx51_efikamx_power_off;
 225
 226                 /* enable coincell charger. maybe need a small power driver ? */
 227                 coincell = regulator_get(NULL, "coincell");
 228                 if (!IS_ERR(coincell)) {
 229                         regulator_set_voltage(coincell, 3000000, 3000000);
 230                         regulator_enable(coincell);
 231                 }
 232
 233                 regulator_has_full_constraints();
 234         }
 235
 236         return 0;
 237 }
 238 late_initcall(mx51_efikamx_power_init);
 239
 240 static void __init mx51_efikamx_init(void)
 241 {
 242         mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
 243                                         ARRAY_SIZE(mx51efikamx_pads));
 244         efika_board_common_init();
 245
 246         mx51_efikamx_board_id();
 247
 248         /* on < 1.2 boards both SD controllers are used */
 249         if (system_rev < 0x12) {
 250                 imx51_add_sdhci_esdhc_imx(1, NULL);
 251                 mx51_efikamx_leds[2].default_trigger = "mmc1";
 252         }
 253
 254         platform_device_register(&mx51_efikamx_leds_device);
 255         imx51_add_gpio_keys(&mx51_efikamx_powerkey_data);
 256
 257         if (system_rev == 0x11) {
 258                 gpio_request(EFIKAMX_RESET1_1, "reset");
 259                 gpio_direction_output(EFIKAMX_RESET1_1, 1);
 260         } else {
 261                 gpio_request(EFIKAMX_RESET, "reset");
 262                 gpio_direction_output(EFIKAMX_RESET, 1);
 263         }
 264
 265         /*
 266          * enable wifi by default only on mx
 267          * sb and mx have same wlan pin but the value to enable it are
 268          * different :/
 269          */
 270         gpio_request(EFIKA_WLAN_EN, "wlan_en");
 271         gpio_direction_output(EFIKA_WLAN_EN, 0);
 272         msleep(10);
 273
 274         gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
 275         gpio_direction_output(EFIKA_WLAN_RESET, 0);
 276         msleep(10);
 277         gpio_set_value(EFIKA_WLAN_RESET, 1);
 278 }
 279
 280 static void __init mx51_efikamx_timer_init(void)
 281 {
 282         mx51_clocks_init(32768, 24000000, 22579200, 24576000);
 283 }
 284
 285 static struct sys_timer mx51_efikamx_timer = {
 286         .init = mx51_efikamx_timer_init,
 287 };
 288
 289 MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
 290         /* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
 291         .boot_params = MX51_PHYS_OFFSET + 0x100,
 292         .map_io = mx51_map_io,
 293         .init_early = imx51_init_early,
 294         .init_irq = mx51_init_irq,
 295         .timer = &mx51_efikamx_timer,
 296         .init_machine = mx51_efikamx_init,
 297 MACHINE_END