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 */
mx51_efikamx_board_id(void)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
mx51_efikamx_restart(char mode,const char * cmd)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
mx51_efikamx_power_off(void)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
mx51_efikamx_power_init(void)208 static int __init mx51_efikamx_power_init(void)
209 {
210 if (machine_is_mx51_efikamx()) {
211 pwgt1 = regulator_get(NULL, "pwgt1");
212 pwgt2 = regulator_get(NULL, "pwgt2");
213 if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) {
214 regulator_enable(pwgt1);
215 regulator_enable(pwgt2);
216 }
217 gpio_request(EFIKAMX_POWEROFF, "poweroff");
218 pm_power_off = mx51_efikamx_power_off;
219
220 /* enable coincell charger. maybe need a small power driver ? */
221 coincell = regulator_get(NULL, "coincell");
222 if (!IS_ERR(coincell)) {
223 regulator_set_voltage(coincell, 3000000, 3000000);
224 regulator_enable(coincell);
225 }
226
227 regulator_has_full_constraints();
228 }
229
230 return 0;
231 }
232 late_initcall(mx51_efikamx_power_init);
233
mx51_efikamx_init(void)234 static void __init mx51_efikamx_init(void)
235 {
236 imx51_soc_init();
237
238 mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
239 ARRAY_SIZE(mx51efikamx_pads));
240 efika_board_common_init();
241
242 mx51_efikamx_board_id();
243
244 /* on < 1.2 boards both SD controllers are used */
245 if (system_rev < 0x12) {
246 imx51_add_sdhci_esdhc_imx(0, NULL);
247 imx51_add_sdhci_esdhc_imx(1, &sd_pdata);
248 mx51_efikamx_leds[2].default_trigger = "mmc1";
249 } else
250 imx51_add_sdhci_esdhc_imx(0, &sd_pdata);
251
252 gpio_led_register_device(-1, &mx51_efikamx_leds_data);
253 imx_add_gpio_keys(&mx51_efikamx_powerkey_data);
254
255 if (system_rev == 0x11) {
256 gpio_request(EFIKAMX_RESET1_1, "reset");
257 gpio_direction_output(EFIKAMX_RESET1_1, 1);
258 } else {
259 gpio_request(EFIKAMX_RESET, "reset");
260 gpio_direction_output(EFIKAMX_RESET, 1);
261 }
262
263 /*
264 * enable wifi by default only on mx
265 * sb and mx have same wlan pin but the value to enable it are
266 * different :/
267 */
268 gpio_request(EFIKA_WLAN_EN, "wlan_en");
269 gpio_direction_output(EFIKA_WLAN_EN, 0);
270 msleep(10);
271
272 gpio_request(EFIKA_WLAN_RESET, "wlan_rst");
273 gpio_direction_output(EFIKA_WLAN_RESET, 0);
274 msleep(10);
275 gpio_set_value(EFIKA_WLAN_RESET, 1);
276 }
277
mx51_efikamx_timer_init(void)278 static void __init mx51_efikamx_timer_init(void)
279 {
280 mx51_clocks_init(32768, 24000000, 22579200, 24576000);
281 }
282
283 static struct sys_timer mx51_efikamx_timer = {
284 .init = mx51_efikamx_timer_init,
285 };
286
287 MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
288 /* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
289 .atag_offset = 0x100,
290 .map_io = mx51_map_io,
291 .init_early = imx51_init_early,
292 .init_irq = mx51_init_irq,
293 .handle_irq = imx51_handle_irq,
294 .timer = &mx51_efikamx_timer,
295 .init_machine = mx51_efikamx_init,
296 .restart = mx51_efikamx_restart,
297 MACHINE_END
298