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