arch/arm/mach-imx/mach-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/system_info.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 "efika.h"
  43
  44 #define EFIKAMX_PCBID0          IMX_GPIO_NR(3, 16)
  45 #define EFIKAMX_PCBID1          IMX_GPIO_NR(3, 17)
  46 #define EFIKAMX_PCBID2          IMX_GPIO_NR(3, 11)
  47
  48 #define EFIKAMX_BLUE_LED        IMX_GPIO_NR(3, 13)
  49 #define EFIKAMX_GREEN_LED       IMX_GPIO_NR(3, 14)
  50 #define EFIKAMX_RED_LED         IMX_GPIO_NR(3, 15)
  51
  52 #define EFIKAMX_POWER_KEY       IMX_GPIO_NR(2, 31)
  53
  54 /* board 1.1 doesn't have same reset gpio */
  55 #define EFIKAMX_RESET1_1        IMX_GPIO_NR(3, 2)
  56 #define EFIKAMX_RESET           IMX_GPIO_NR(1, 4)
  57
  58 #define EFIKAMX_POWEROFF        IMX_GPIO_NR(4, 13)
  59
  60 #define EFIKAMX_PMIC            IMX_GPIO_NR(1, 6)
  61
  62 /* the pci ids pin have pull up. they're driven low according to board id */
  63 #define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  64 #define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  65 #define MX51_PAD_PCBID2 IOMUX_PAD(0x504, 0x128, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  66 #define MX51_PAD_PWRKEY IOMUX_PAD(0x48c, 0x0f8, 1, 0x0,   0, PAD_CTL_PUS_100K_UP | PAD_CTL_PKE)
  67
  68 static iomux_v3_cfg_t mx51efikamx_pads[] = {
  69         /* board id */
  70         MX51_PAD_PCBID0,
  71         MX51_PAD_PCBID1,
  72         MX51_PAD_PCBID2,
  73
  74         /* leds */
  75         MX51_PAD_CSI1_D9__GPIO3_13,
  76         MX51_PAD_CSI1_VSYNC__GPIO3_14,
  77         MX51_PAD_CSI1_HSYNC__GPIO3_15,
  78
  79         /* power key */
  80         MX51_PAD_PWRKEY,
  81
  82         /* reset */
  83         MX51_PAD_DI1_PIN13__GPIO3_2,
  84         MX51_PAD_GPIO1_4__GPIO1_4,
  85
  86         /* power off */
  87         MX51_PAD_CSI2_VSYNC__GPIO4_13,
  88 };
  89
  90 /*   PCBID2  PCBID1 PCBID0  STATE
  91         1       1      1    ER1:rev1.1
  92         1       1      0    ER2:rev1.2
  93         1       0      1    ER3:rev1.3
  94         1       0      0    ER4:rev1.4
  95 */
  96 static void __init mx51_efikamx_board_id(void)
  97 {
  98         int id;
  99
 100         /* things are taking time to settle */
 101         msleep(150);
 102
 103         gpio_request(EFIKAMX_PCBID0, "pcbid0");
 104         gpio_direction_input(EFIKAMX_PCBID0);
 105         gpio_request(EFIKAMX_PCBID1, "pcbid1");
 106         gpio_direction_input(EFIKAMX_PCBID1);
 107         gpio_request(EFIKAMX_PCBID2, "pcbid2");
 108         gpio_direction_input(EFIKAMX_PCBID2);
 109
 110         id = gpio_get_value(EFIKAMX_PCBID0) ? 1 : 0;
 111         id |= (gpio_get_value(EFIKAMX_PCBID1) ? 1 : 0) << 1;
 112         id |= (gpio_get_value(EFIKAMX_PCBID2) ? 1 : 0) << 2;
 113
 114         switch (id) {
 115         case 7:
 116                 system_rev = 0x11;
 117                 break;
 118         case 6:
 119                 system_rev = 0x12;
 120                 break;
 121         case 5:
 122                 system_rev = 0x13;
 123                 break;
 124         case 4:
 125                 system_rev = 0x14;
 126                 break;
 127         default:
 128                 system_rev = 0x10;
 129                 break;
 130         }
 131
 132         if ((system_rev == 0x10)
 133                 || (system_rev == 0x12)
 134                 || (system_rev == 0x14)) {
 135                 printk(KERN_WARNING
 136                         "EfikaMX: Unsupported board revision 1.%u!\n",
 137                         system_rev & 0xf);
 138         }
 139 }
 140
 141 static struct gpio_led mx51_efikamx_leds[] __initdata = {
 142         {
 143                 .name = "efikamx:green",
 144                 .default_trigger = "default-on",
 145                 .gpio = EFIKAMX_GREEN_LED,
 146         },
 147         {
 148                 .name = "efikamx:red",
 149                 .default_trigger = "ide-disk",
 150                 .gpio = EFIKAMX_RED_LED,
 151         },
 152         {
 153                 .name = "efikamx:blue",
 154                 .default_trigger = "mmc0",
 155                 .gpio = EFIKAMX_BLUE_LED,
 156         },
 157 };
 158
 159 static const struct gpio_led_platform_data
 160                 mx51_efikamx_leds_data __initconst = {
 161         .leds = mx51_efikamx_leds,
 162         .num_leds = ARRAY_SIZE(mx51_efikamx_leds),
 163 };
 164
 165 static struct esdhc_platform_data sd_pdata = {
 166         .cd_type = ESDHC_CD_CONTROLLER,
 167         .wp_type = ESDHC_WP_CONTROLLER,
 168 };
 169
 170 static struct gpio_keys_button mx51_efikamx_powerkey[] = {
 171         {
 172                 .code = KEY_POWER,
 173                 .gpio = EFIKAMX_POWER_KEY,
 174                 .type = EV_PWR,
 175                 .desc = "Power Button (CM)",
 176                 .wakeup = 1,
 177                 .debounce_interval = 10, /* ms */
 178         },
 179 };
 180
 181 static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
 182         .buttons = mx51_efikamx_powerkey,
 183         .nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
 184 };
 185
 186 static void mx51_efikamx_restart(char mode, const char *cmd)
 187 {
 188         if (system_rev == 0x11)
 189                 gpio_direction_output(EFIKAMX_RESET1_1, 0);
 190         else
 191                 gpio_direction_output(EFIKAMX_RESET, 0);
 192 }
 193
 194 static struct regulator *pwgt1, *pwgt2, *coincell;
 195
 196 static void mx51_efikamx_power_off(void)
 197 {
 198         if (!IS_ERR(coincell))
 199                 regulator_disable(coincell);
 200
 201         if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
 202                 regulator_disable(pwgt2);
 203                 regulator_disable(pwgt1);
 204         }
 205         gpio_direction_output(EFIKAMX_POWEROFF, 1);
 206 }
 207
 208 static int __init mx51_efikamx_power_init(void)
 209 {
 210         pwgt1 = regulator_get(NULL, "pwgt1");
 211         pwgt2 = regulator_get(NULL, "pwgt2");
 212         if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
 213                 regulator_enable(pwgt1);
 214                 regulator_enable(pwgt2);
 215         }
 216         gpio_request(EFIKAMX_POWEROFF, "poweroff");
 217         pm_power_off = mx51_efikamx_power_off;
 218
 219         /* enable coincell charger. maybe need a small power driver ? */
 220         coincell = regulator_get(NULL, "coincell");
 221         if (!IS_ERR(coincell)) {
 222                 regulator_set_voltage(coincell, 3000000, 3000000);
 223                 regulator_enable(coincell);
 224         }
 225
 226         regulator_has_full_constraints();
 227
 228         return 0;
 229 }
 230
 231 static void __init mx51_efikamx_init_late(void)
 232 {
 233         imx51_init_late();
 234         mx51_efikamx_power_init();
 235 }
 236
 237 static void __init mx51_efikamx_init(void)
 238 {
 239         imx51_soc_init();
 240
 241         mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
 242                                         ARRAY_SIZE(mx51efikamx_pads));
 243         efika_board_common_init();
 244
 245         mx51_efikamx_board_id();
 246
 247         /* on < 1.2 boards both SD controllers are used */
 248         if (system_rev < 0x12) {
 249                 imx51_add_sdhci_esdhc_imx(0, NULL);
 250                 imx51_add_sdhci_esdhc_imx(1, &sd_pdata);
 251                 mx51_efikamx_leds[2].default_trigger = "mmc1";
 252         } else
 253                 imx51_add_sdhci_esdhc_imx(0, &sd_pdata);
 254
 255         gpio_led_register_device(-1, &mx51_efikamx_leds_data);
 256         imx_add_gpio_keys(&mx51_efikamx_powerkey_data);
 257
 258         if (system_rev == 0x11) {
 259                 gpio_request(EFIKAMX_RESET1_1, "reset");
 260                 gpio_direction_output(EFIKAMX_RESET1_1, 1);
 261         } else {
 262                 gpio_request(EFIKAMX_RESET, "reset");
 263                 gpio_direction_output(EFIKAMX_RESET, 1);
 264         }
 265
 266         /*
 267          * enable wifi by default only on mx
 268          * sb and mx have same wlan pin but the value to enable it are
 269          * different :/
 270          */
 271         gpio_request(EFIKA_WLAN_EN, "wlan_en");
 272         gpio_direction_output(EFIKA_WLAN_EN, 0);
 273         msleep(10);
 274
 275         gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
 276         gpio_direction_output(EFIKA_WLAN_RESET, 0);
 277         msleep(10);
 278         gpio_set_value(EFIKA_WLAN_RESET, 1);
 279 }
 280
 281 static void __init mx51_efikamx_timer_init(void)
 282 {
 283         mx51_clocks_init(32768, 24000000, 22579200, 24576000);
 284 }
 285
 286 static struct sys_timer mx51_efikamx_timer = {
 287         .init = mx51_efikamx_timer_init,
 288 };
 289
 290 MACHINE_START(MX51_EFIKAMX, "Genesi Efika MX (Smarttop)")
 291         .atag_offset = 0x100,
 292         .map_io = mx51_map_io,
 293         .init_early = imx51_init_early,
 294         .init_irq = mx51_init_irq,
 295         .handle_irq = imx51_handle_irq,
 296         .timer = &mx51_efikamx_timer,
 297         .init_machine = mx51_efikamx_init,
 298         .init_late = mx51_efikamx_init_late,
 299         .restart = mx51_efikamx_restart,
 300 MACHINE_END