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/spi/flash.h>
  26 #include <linux/spi/spi.h>
  27 #include <linux/mfd/mc13892.h>
  28 #include <linux/regulator/machine.h>
  29 #include <linux/regulator/consumer.h>
  30
  31 #include <mach/common.h>
  32 #include <mach/hardware.h>
  33 #include <mach/iomux-mx51.h>
  34
  35 #include <asm/irq.h>
  36 #include <asm/setup.h>
  37 #include <asm/mach-types.h>
  38 #include <asm/mach/arch.h>
  39 #include <asm/mach/time.h>
  40
  41 #include "devices-imx51.h"
  42 #include "devices.h"
  43 #include "efika.h"
  44
  45 #define EFIKAMX_PCBID0          IMX_GPIO_NR(3, 16)
  46 #define EFIKAMX_PCBID1          IMX_GPIO_NR(3, 17)
  47 #define EFIKAMX_PCBID2          IMX_GPIO_NR(3, 11)
  48
  49 #define EFIKAMX_BLUE_LED        IMX_GPIO_NR(3, 13)
  50 #define EFIKAMX_GREEN_LED       IMX_GPIO_NR(3, 14)
  51 #define EFIKAMX_RED_LED         IMX_GPIO_NR(3, 15)
  52
  53 #define EFIKAMX_POWER_KEY       IMX_GPIO_NR(2, 31)
  54
  55 /* board 1.1 doesn't have same reset gpio */
  56 #define EFIKAMX_RESET1_1        IMX_GPIO_NR(3, 2)
  57 #define EFIKAMX_RESET           IMX_GPIO_NR(1, 4)
  58
  59 #define EFIKAMX_POWEROFF        IMX_GPIO_NR(4, 13)
  60
  61 #define EFIKAMX_PMIC            IMX_GPIO_NR(1, 6)
  62
  63 /* the pci ids pin have pull up. they're driven low according to board id */
  64 #define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  65 #define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  66 #define MX51_PAD_PCBID2 IOMUX_PAD(0x504, 0x128, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  67 #define MX51_PAD_PWRKEY IOMUX_PAD(0x48c, 0x0f8, 1, 0x0,   0, PAD_CTL_PUS_100K_UP | PAD_CTL_PKE)
  68
  69 static iomux_v3_cfg_t mx51efikamx_pads[] = {
  70         /* board id */
  71         MX51_PAD_PCBID0,
  72         MX51_PAD_PCBID1,
  73         MX51_PAD_PCBID2,
  74
  75         /* leds */
  76         MX51_PAD_CSI1_D9__GPIO3_13,
  77         MX51_PAD_CSI1_VSYNC__GPIO3_14,
  78         MX51_PAD_CSI1_HSYNC__GPIO3_15,
  79
  80         /* power key */
  81         MX51_PAD_PWRKEY,
  82
  83         /* reset */
  84         MX51_PAD_DI1_PIN13__GPIO3_2,
  85         MX51_PAD_GPIO1_4__GPIO1_4,
  86
  87         /* power off */
  88         MX51_PAD_CSI2_VSYNC__GPIO4_13,
  89 };
  90
  91 /*   PCBID2  PCBID1 PCBID0  STATE
  92         1       1      1    ER1:rev1.1
  93         1       1      0    ER2:rev1.2
  94         1       0      1    ER3:rev1.3
  95         1       0      0    ER4:rev1.4
  96 */
  97 static void __init mx51_efikamx_board_id(void)
  98 {
  99         int id;
 100
 101         /* things are taking time to settle */
 102         msleep(150);
 103
 104         gpio_request(EFIKAMX_PCBID0, "pcbid0");
 105         gpio_direction_input(EFIKAMX_PCBID0);
 106         gpio_request(EFIKAMX_PCBID1, "pcbid1");
 107         gpio_direction_input(EFIKAMX_PCBID1);
 108         gpio_request(EFIKAMX_PCBID2, "pcbid2");
 109         gpio_direction_input(EFIKAMX_PCBID2);
 110
 111         id = gpio_get_value(EFIKAMX_PCBID0);
 112         id |= gpio_get_value(EFIKAMX_PCBID1) << 1;
 113         id |= gpio_get_value(EFIKAMX_PCBID2) << 2;
 114
 115         switch (id) {
 116         case 7:
 117                 system_rev = 0x11;
 118                 break;
 119         case 6:
 120                 system_rev = 0x12;
 121                 break;
 122         case 5:
 123                 system_rev = 0x13;
 124                 break;
 125         case 4:
 126                 system_rev = 0x14;
 127                 break;
 128         default:
 129                 system_rev = 0x10;
 130                 break;
 131         }
 132
 133         if ((system_rev == 0x10)
 134                 || (system_rev == 0x12)
 135                 || (system_rev == 0x14)) {
 136                 printk(KERN_WARNING
 137                         "EfikaMX: Unsupported board revision 1.%u!\n",
 138                         system_rev & 0xf);
 139         }
 140 }
 141
 142 static struct gpio_led mx51_efikamx_leds[] __initdata = {
 143         {
 144                 .name = "efikamx:green",
 145                 .default_trigger = "default-on",
 146                 .gpio = EFIKAMX_GREEN_LED,
 147         },
 148         {
 149                 .name = "efikamx:red",
 150                 .default_trigger = "ide-disk",
 151                 .gpio = EFIKAMX_RED_LED,
 152         },
 153         {
 154                 .name = "efikamx:blue",
 155                 .default_trigger = "mmc0",
 156                 .gpio = EFIKAMX_BLUE_LED,
 157         },
 158 };
 159
 160 static const struct gpio_led_platform_data
 161                 mx51_efikamx_leds_data __initconst = {
 162         .leds = mx51_efikamx_leds,
 163         .num_leds = ARRAY_SIZE(mx51_efikamx_leds),
 164 };
 165
 166 static struct gpio_keys_button mx51_efikamx_powerkey[] = {
 167         {
 168                 .code = KEY_POWER,
 169                 .gpio = EFIKAMX_POWER_KEY,
 170                 .type = EV_PWR,
 171                 .desc = "Power Button (CM)",
 172                 .wakeup = 1,
 173                 .debounce_interval = 10, /* ms */
 174         },
 175 };
 176
 177 static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
 178         .buttons = mx51_efikamx_powerkey,
 179         .nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
 180 };
 181
 182 void mx51_efikamx_reset(void)
 183 {
 184         if (system_rev == 0x11)
 185                 gpio_direction_output(EFIKAMX_RESET1_1, 0);
 186         else
 187                 gpio_direction_output(EFIKAMX_RESET, 0);
 188 }
 189
 190 static struct regulator *pwgt1, *pwgt2, *coincell;
 191
 192 static void mx51_efikamx_power_off(void)
 193 {
 194         if (!IS_ERR(coincell))
 195                 regulator_disable(coincell);
 196
 197         if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
 198                 regulator_disable(pwgt2);
 199                 regulator_disable(pwgt1);
 200         }
 201         gpio_direction_output(EFIKAMX_POWEROFF, 1);
 202 }
 203
 204 static int __init mx51_efikamx_power_init(void)
 205 {
 206         if (machine_is_mx51_efikamx()) {
 207                 pwgt1 = regulator_get(NULL, "pwgt1");
 208                 pwgt2 = regulator_get(NULL, "pwgt2");
 209                 if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
 210                         regulator_enable(pwgt1);
 211                         regulator_enable(pwgt2);
 212                 }
 213                 gpio_request(EFIKAMX_POWEROFF, "poweroff");
 214                 pm_power_off = mx51_efikamx_power_off;
 215
 216                 /* enable coincell charger. maybe need a small power driver ? */
 217                 coincell = regulator_get(NULL, "coincell");
 218                 if (!IS_ERR(coincell)) {
 219                         regulator_set_voltage(coincell, 3000000, 3000000);
 220                         regulator_enable(coincell);
 221                 }
 222
 223                 regulator_has_full_constraints();
 224         }
 225
 226         return 0;
 227 }
 228 late_initcall(mx51_efikamx_power_init);
 229
 230 static void __init mx51_efikamx_init(void)
 231 {
 232         imx51_soc_init();
 233
 234         mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
 235                                         ARRAY_SIZE(mx51efikamx_pads));
 236         efika_board_common_init();
 237
 238         mx51_efikamx_board_id();
 239
 240         /* on < 1.2 boards both SD controllers are used */
 241         if (system_rev < 0x12) {
 242                 imx51_add_sdhci_esdhc_imx(1, NULL);
 243                 mx51_efikamx_leds[2].default_trigger = "mmc1";
 244         }
 245
 246         gpio_led_register_device(-1, &mx51_efikamx_leds_data);
 247         imx_add_gpio_keys(&mx51_efikamx_powerkey_data);
 248
 249         if (system_rev == 0x11) {
 250                 gpio_request(EFIKAMX_RESET1_1, "reset");
 251                 gpio_direction_output(EFIKAMX_RESET1_1, 1);
 252         } else {
 253                 gpio_request(EFIKAMX_RESET, "reset");
 254                 gpio_direction_output(EFIKAMX_RESET, 1);
 255         }
 256
 257         /*
 258          * enable wifi by default only on mx
 259          * sb and mx have same wlan pin but the value to enable it are
 260          * different :/
 261          */
 262         gpio_request(EFIKA_WLAN_EN, "wlan_en");
 263         gpio_direction_output(EFIKA_WLAN_EN, 0);
 264         msleep(10);
 265
 266         gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
 267         gpio_direction_output(EFIKA_WLAN_RESET, 0);
 268         msleep(10);
 269         gpio_set_value(EFIKA_WLAN_RESET, 1);
 270 }
 271
 272 static void __init mx51_efikamx_timer_init(void)
 273 {
 274         mx51_clocks_init(32768, 24000000, 22579200, 24576000);
 275 }
 276
 277 static struct sys_timer mx51_efikamx_timer = {
 278         .init = mx51_efikamx_timer_init,
 279 };
 280
 281 MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
 282         /* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
 283         .boot_params = MX51_PHYS_OFFSET + 0x100,
 284         .map_io = mx51_map_io,
 285         .init_early = imx51_init_early,
 286         .init_irq = mx51_init_irq,
 287         .timer = &mx51_efikamx_timer,
 288         .init_machine = mx51_efikamx_init,
 289 MACHINE_END