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 */
mx51_efikamx_board_id(void)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 esdhc_platform_data sd_pdata = {
165 .cd_type = ESDHC_CD_CONTROLLER,
166 .wp_type = ESDHC_WP_CONTROLLER,
167 };
168
169 static struct gpio_keys_button mx51_efikamx_powerkey[] = {
170 {
171 .code = KEY_POWER,
172 .gpio = EFIKAMX_POWER_KEY,
173 .type = EV_PWR,
174 .desc = "Power Button (CM)",
175 .wakeup = 1,
176 .debounce_interval = 10, /* ms */
177 },
178 };
179
180 static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
181 .buttons = mx51_efikamx_powerkey,
182 .nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
183 };
184
mx51_efikamx_restart(char mode,const char * cmd)185 static void mx51_efikamx_restart(char mode, const char *cmd)
186 {
187 if (system_rev == 0x11)
188 gpio_direction_output(EFIKAMX_RESET1_1, 0);
189 else
190 gpio_direction_output(EFIKAMX_RESET, 0);
191 }
192
193 static struct regulator *pwgt1, *pwgt2, *coincell;
194
mx51_efikamx_power_off(void)195 static void mx51_efikamx_power_off(void)
196 {
197 if (!IS_ERR(coincell))
198 regulator_disable(coincell);
199
200 if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
201 regulator_disable(pwgt2);
202 regulator_disable(pwgt1);
203 }
204 gpio_direction_output(EFIKAMX_POWEROFF, 1);
205 }
206
mx51_efikamx_power_init(void)207 static int __init mx51_efikamx_power_init(void)
208 {
209 if (machine_is_mx51_efikamx()) {
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
229 return 0;
230 }
231 late_initcall(mx51_efikamx_power_init);
232
mx51_efikamx_init(void)233 static void __init mx51_efikamx_init(void)
234 {
235 imx51_soc_init();
236
237 mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
238 ARRAY_SIZE(mx51efikamx_pads));
239 efika_board_common_init();
240
241 mx51_efikamx_board_id();
242
243 /* on < 1.2 boards both SD controllers are used */
244 if (system_rev < 0x12) {
245 imx51_add_sdhci_esdhc_imx(0, NULL);
246 imx51_add_sdhci_esdhc_imx(1, &sd_pdata);
247 mx51_efikamx_leds[2].default_trigger = "mmc1";
248 } else
249 imx51_add_sdhci_esdhc_imx(0, &sd_pdata);
250
251 gpio_led_register_device(-1, &mx51_efikamx_leds_data);
252 imx_add_gpio_keys(&mx51_efikamx_powerkey_data);
253
254 if (system_rev == 0x11) {
255 gpio_request(EFIKAMX_RESET1_1, "reset");
256 gpio_direction_output(EFIKAMX_RESET1_1, 1);
257 } else {
258 gpio_request(EFIKAMX_RESET, "reset");
259 gpio_direction_output(EFIKAMX_RESET, 1);
260 }
261
262 /*
263 * enable wifi by default only on mx
264 * sb and mx have same wlan pin but the value to enable it are
265 * different :/
266 */
267 gpio_request(EFIKA_WLAN_EN, "wlan_en");
268 gpio_direction_output(EFIKA_WLAN_EN, 0);
269 msleep(10);
270
271 gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
272 gpio_direction_output(EFIKA_WLAN_RESET, 0);
273 msleep(10);
274 gpio_set_value(EFIKA_WLAN_RESET, 1);
275 }
276
mx51_efikamx_timer_init(void)277 static void __init mx51_efikamx_timer_init(void)
278 {
279 mx51_clocks_init(32768, 24000000, 22579200, 24576000);
280 }
281
282 static struct sys_timer mx51_efikamx_timer = {
283 .init = mx51_efikamx_timer_init,
284 };
285
286 MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
287 /* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
288 .atag_offset = 0x100,
289 .map_io = mx51_map_io,
290 .init_early = imx51_init_early,
291 .init_irq = mx51_init_irq,
292 .handle_irq = imx51_handle_irq,
293 .timer = &mx51_efikamx_timer,
294 .init_machine = mx51_efikamx_init,
295 .restart = mx51_efikamx_restart,
296 MACHINE_END
297