mirror of https://gitee.com/openkylin/linux.git
295 lines
7.1 KiB
C
295 lines
7.1 KiB
C
/*
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* Copyright (C) 2010 Linaro Limited
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*
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* based on code from the following
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* Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright 2009-2010 Pegatron Corporation. All Rights Reserved.
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* Copyright 2009-2010 Genesi USA, Inc. All Rights Reserved.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/input.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/spi/flash.h>
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#include <linux/spi/spi.h>
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#include <linux/mfd/mc13892.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/consumer.h>
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#include <mach/common.h>
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#include <mach/hardware.h>
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#include <mach/iomux-mx51.h>
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#include <asm/irq.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#include "devices-imx51.h"
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#include "devices.h"
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#include "efika.h"
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#define EFIKAMX_PCBID0 IMX_GPIO_NR(3, 16)
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#define EFIKAMX_PCBID1 IMX_GPIO_NR(3, 17)
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#define EFIKAMX_PCBID2 IMX_GPIO_NR(3, 11)
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#define EFIKAMX_BLUE_LED IMX_GPIO_NR(3, 13)
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#define EFIKAMX_GREEN_LED IMX_GPIO_NR(3, 14)
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#define EFIKAMX_RED_LED IMX_GPIO_NR(3, 15)
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#define EFIKAMX_POWER_KEY IMX_GPIO_NR(2, 31)
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/* board 1.1 doesn't have same reset gpio */
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#define EFIKAMX_RESET1_1 IMX_GPIO_NR(3, 2)
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#define EFIKAMX_RESET IMX_GPIO_NR(1, 4)
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#define EFIKAMX_POWEROFF IMX_GPIO_NR(4, 13)
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#define EFIKAMX_PMIC IMX_GPIO_NR(1, 6)
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/* the pci ids pin have pull up. they're driven low according to board id */
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#define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
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#define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
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#define MX51_PAD_PCBID2 IOMUX_PAD(0x504, 0x128, 3, 0x0, 0, PAD_CTL_PUS_100K_UP)
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#define MX51_PAD_PWRKEY IOMUX_PAD(0x48c, 0x0f8, 1, 0x0, 0, PAD_CTL_PUS_100K_UP | PAD_CTL_PKE)
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static iomux_v3_cfg_t mx51efikamx_pads[] = {
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/* board id */
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MX51_PAD_PCBID0,
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MX51_PAD_PCBID1,
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MX51_PAD_PCBID2,
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/* leds */
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MX51_PAD_CSI1_D9__GPIO3_13,
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MX51_PAD_CSI1_VSYNC__GPIO3_14,
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MX51_PAD_CSI1_HSYNC__GPIO3_15,
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/* power key */
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MX51_PAD_PWRKEY,
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/* reset */
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MX51_PAD_DI1_PIN13__GPIO3_2,
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MX51_PAD_GPIO1_4__GPIO1_4,
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/* power off */
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MX51_PAD_CSI2_VSYNC__GPIO4_13,
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};
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/* PCBID2 PCBID1 PCBID0 STATE
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1 1 1 ER1:rev1.1
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1 1 0 ER2:rev1.2
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1 0 1 ER3:rev1.3
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1 0 0 ER4:rev1.4
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*/
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static void __init mx51_efikamx_board_id(void)
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{
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int id;
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/* things are taking time to settle */
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msleep(150);
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gpio_request(EFIKAMX_PCBID0, "pcbid0");
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gpio_direction_input(EFIKAMX_PCBID0);
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gpio_request(EFIKAMX_PCBID1, "pcbid1");
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gpio_direction_input(EFIKAMX_PCBID1);
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gpio_request(EFIKAMX_PCBID2, "pcbid2");
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gpio_direction_input(EFIKAMX_PCBID2);
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id = gpio_get_value(EFIKAMX_PCBID0);
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id |= gpio_get_value(EFIKAMX_PCBID1) << 1;
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id |= gpio_get_value(EFIKAMX_PCBID2) << 2;
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switch (id) {
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case 7:
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system_rev = 0x11;
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break;
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case 6:
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system_rev = 0x12;
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break;
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case 5:
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system_rev = 0x13;
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break;
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case 4:
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system_rev = 0x14;
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break;
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default:
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system_rev = 0x10;
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break;
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}
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if ((system_rev == 0x10)
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|| (system_rev == 0x12)
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|| (system_rev == 0x14)) {
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printk(KERN_WARNING
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"EfikaMX: Unsupported board revision 1.%u!\n",
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system_rev & 0xf);
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}
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}
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static struct gpio_led mx51_efikamx_leds[] = {
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{
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.name = "efikamx:green",
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.default_trigger = "default-on",
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.gpio = EFIKAMX_GREEN_LED,
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},
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{
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.name = "efikamx:red",
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.default_trigger = "ide-disk",
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.gpio = EFIKAMX_RED_LED,
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},
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{
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.name = "efikamx:blue",
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.default_trigger = "mmc0",
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.gpio = EFIKAMX_BLUE_LED,
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},
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};
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static struct gpio_led_platform_data mx51_efikamx_leds_data = {
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.leds = mx51_efikamx_leds,
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.num_leds = ARRAY_SIZE(mx51_efikamx_leds),
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};
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static struct platform_device mx51_efikamx_leds_device = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &mx51_efikamx_leds_data,
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},
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};
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static struct gpio_keys_button mx51_efikamx_powerkey[] = {
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{
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.code = KEY_POWER,
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.gpio = EFIKAMX_POWER_KEY,
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.type = EV_PWR,
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.desc = "Power Button (CM)",
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.wakeup = 1,
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.debounce_interval = 10, /* ms */
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},
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};
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static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
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.buttons = mx51_efikamx_powerkey,
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.nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
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};
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void mx51_efikamx_reset(void)
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{
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if (system_rev == 0x11)
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gpio_direction_output(EFIKAMX_RESET1_1, 0);
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else
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gpio_direction_output(EFIKAMX_RESET, 0);
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}
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static struct regulator *pwgt1, *pwgt2, *coincell;
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static void mx51_efikamx_power_off(void)
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{
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if (!IS_ERR(coincell))
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regulator_disable(coincell);
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if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
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regulator_disable(pwgt2);
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regulator_disable(pwgt1);
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}
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gpio_direction_output(EFIKAMX_POWEROFF, 1);
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}
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static int __init mx51_efikamx_power_init(void)
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{
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if (machine_is_mx51_efikamx()) {
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pwgt1 = regulator_get(NULL, "pwgt1");
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pwgt2 = regulator_get(NULL, "pwgt2");
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if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
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regulator_enable(pwgt1);
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regulator_enable(pwgt2);
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}
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gpio_request(EFIKAMX_POWEROFF, "poweroff");
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pm_power_off = mx51_efikamx_power_off;
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/* enable coincell charger. maybe need a small power driver ? */
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coincell = regulator_get(NULL, "coincell");
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if (!IS_ERR(coincell)) {
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regulator_set_voltage(coincell, 3000000, 3000000);
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regulator_enable(coincell);
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}
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regulator_has_full_constraints();
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}
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return 0;
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}
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late_initcall(mx51_efikamx_power_init);
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static void __init mx51_efikamx_init(void)
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{
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mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
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ARRAY_SIZE(mx51efikamx_pads));
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efika_board_common_init();
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mx51_efikamx_board_id();
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/* on < 1.2 boards both SD controllers are used */
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if (system_rev < 0x12) {
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imx51_add_sdhci_esdhc_imx(1, NULL);
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mx51_efikamx_leds[2].default_trigger = "mmc1";
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}
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platform_device_register(&mx51_efikamx_leds_device);
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imx_add_gpio_keys(&mx51_efikamx_powerkey_data);
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if (system_rev == 0x11) {
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gpio_request(EFIKAMX_RESET1_1, "reset");
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gpio_direction_output(EFIKAMX_RESET1_1, 1);
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} else {
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gpio_request(EFIKAMX_RESET, "reset");
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gpio_direction_output(EFIKAMX_RESET, 1);
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}
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/*
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* enable wifi by default only on mx
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* sb and mx have same wlan pin but the value to enable it are
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* different :/
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*/
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gpio_request(EFIKA_WLAN_EN, "wlan_en");
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gpio_direction_output(EFIKA_WLAN_EN, 0);
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msleep(10);
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gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
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gpio_direction_output(EFIKA_WLAN_RESET, 0);
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msleep(10);
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gpio_set_value(EFIKA_WLAN_RESET, 1);
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}
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static void __init mx51_efikamx_timer_init(void)
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{
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mx51_clocks_init(32768, 24000000, 22579200, 24576000);
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}
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static struct sys_timer mx51_efikamx_timer = {
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.init = mx51_efikamx_timer_init,
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};
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MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
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/* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
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.boot_params = MX51_PHYS_OFFSET + 0x100,
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.map_io = mx51_map_io,
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.init_early = imx51_init_early,
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.init_irq = mx51_init_irq,
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.timer = &mx51_efikamx_timer,
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.init_machine = mx51_efikamx_init,
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MACHINE_END
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