2 * Copyright (C) 2010 Linaro Limited
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.
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:
13 * http://www.opensource.org/licenses/gpl-license.html
14 * http://www.gnu.org/copyleft/gpl.html
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>
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>
31 #include <mach/common.h>
32 #include <mach/hardware.h>
33 #include <mach/iomux-mx51.h>
36 #include <asm/setup.h>
37 #include <asm/mach-types.h>
38 #include <asm/mach/arch.h>
39 #include <asm/mach/time.h>
41 #include "devices-imx51.h"
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)
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)
52 #define EFIKAMX_POWER_KEY IMX_GPIO_NR(2, 31)
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)
58 #define EFIKAMX_POWEROFF IMX_GPIO_NR(4, 13)
60 #define EFIKAMX_PMIC IMX_GPIO_NR(1, 6)
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)
68 static iomux_v3_cfg_t mx51efikamx_pads[] = {
75 MX51_PAD_CSI1_D9__GPIO3_13,
76 MX51_PAD_CSI1_VSYNC__GPIO3_14,
77 MX51_PAD_CSI1_HSYNC__GPIO3_15,
83 MX51_PAD_DI1_PIN13__GPIO3_2,
84 MX51_PAD_GPIO1_4__GPIO1_4,
87 MX51_PAD_CSI2_VSYNC__GPIO4_13,
90 /* PCBID2 PCBID1 PCBID0 STATE
96 static void __init mx51_efikamx_board_id(void)
100 /* things are taking time to settle */
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);
110 id = gpio_get_value(EFIKAMX_PCBID0);
111 id |= gpio_get_value(EFIKAMX_PCBID1) << 1;
112 id |= gpio_get_value(EFIKAMX_PCBID2) << 2;
132 if ((system_rev == 0x10)
133 || (system_rev == 0x12)
134 || (system_rev == 0x14)) {
136 "EfikaMX: Unsupported board revision 1.%u!\n",
141 static struct gpio_led mx51_efikamx_leds[] __initdata = {
143 .name = "efikamx:green",
144 .default_trigger = "default-on",
145 .gpio = EFIKAMX_GREEN_LED,
148 .name = "efikamx:red",
149 .default_trigger = "ide-disk",
150 .gpio = EFIKAMX_RED_LED,
153 .name = "efikamx:blue",
154 .default_trigger = "mmc0",
155 .gpio = EFIKAMX_BLUE_LED,
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),
165 static struct gpio_keys_button mx51_efikamx_powerkey[] = {
168 .gpio = EFIKAMX_POWER_KEY,
170 .desc = "Power Button (CM)",
172 .debounce_interval = 10, /* ms */
176 static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
177 .buttons = mx51_efikamx_powerkey,
178 .nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
181 void mx51_efikamx_reset(void)
183 if (system_rev == 0x11)
184 gpio_direction_output(EFIKAMX_RESET1_1, 0);
186 gpio_direction_output(EFIKAMX_RESET, 0);
189 static struct regulator *pwgt1, *pwgt2, *coincell;
191 static void mx51_efikamx_power_off(void)
193 if (!IS_ERR(coincell))
194 regulator_disable(coincell);
196 if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
197 regulator_disable(pwgt2);
198 regulator_disable(pwgt1);
200 gpio_direction_output(EFIKAMX_POWEROFF, 1);
203 static int __init mx51_efikamx_power_init(void)
205 if (machine_is_mx51_efikamx()) {
206 pwgt1 = regulator_get(NULL, "pwgt1");
207 pwgt2 = regulator_get(NULL, "pwgt2");
208 if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
209 regulator_enable(pwgt1);
210 regulator_enable(pwgt2);
212 gpio_request(EFIKAMX_POWEROFF, "poweroff");
213 pm_power_off = mx51_efikamx_power_off;
215 /* enable coincell charger. maybe need a small power driver ? */
216 coincell = regulator_get(NULL, "coincell");
217 if (!IS_ERR(coincell)) {
218 regulator_set_voltage(coincell, 3000000, 3000000);
219 regulator_enable(coincell);
222 regulator_has_full_constraints();
227 late_initcall(mx51_efikamx_power_init);
229 static void __init mx51_efikamx_init(void)
233 mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
234 ARRAY_SIZE(mx51efikamx_pads));
235 efika_board_common_init();
237 mx51_efikamx_board_id();
239 /* on < 1.2 boards both SD controllers are used */
240 if (system_rev < 0x12) {
241 imx51_add_sdhci_esdhc_imx(1, NULL);
242 mx51_efikamx_leds[2].default_trigger = "mmc1";
245 gpio_led_register_device(-1, &mx51_efikamx_leds_data);
246 imx_add_gpio_keys(&mx51_efikamx_powerkey_data);
248 if (system_rev == 0x11) {
249 gpio_request(EFIKAMX_RESET1_1, "reset");
250 gpio_direction_output(EFIKAMX_RESET1_1, 1);
252 gpio_request(EFIKAMX_RESET, "reset");
253 gpio_direction_output(EFIKAMX_RESET, 1);
257 * enable wifi by default only on mx
258 * sb and mx have same wlan pin but the value to enable it are
261 gpio_request(EFIKA_WLAN_EN, "wlan_en");
262 gpio_direction_output(EFIKA_WLAN_EN, 0);
265 gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
266 gpio_direction_output(EFIKA_WLAN_RESET, 0);
268 gpio_set_value(EFIKA_WLAN_RESET, 1);
271 static void __init mx51_efikamx_timer_init(void)
273 mx51_clocks_init(32768, 24000000, 22579200, 24576000);
276 static struct sys_timer mx51_efikamx_timer = {
277 .init = mx51_efikamx_timer_init,
280 MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
281 /* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
282 .boot_params = MX51_PHYS_OFFSET + 0x100,
283 .map_io = mx51_map_io,
284 .init_early = imx51_init_early,
285 .init_irq = mx51_init_irq,
286 .timer = &mx51_efikamx_timer,
287 .init_machine = mx51_efikamx_init,