1 /*
2  * Board init file for Dragonboard 410C
3  *
4  * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  */
8 
9 #include <common.h>
10 #include <dm.h>
11 #include <usb.h>
12 #include <asm/gpio.h>
13 
14 DECLARE_GLOBAL_DATA_PTR;
15 
16 int dram_init(void)
17 {
18 	gd->ram_size = PHYS_SDRAM_1_SIZE;
19 	return 0;
20 }
21 
22 void dram_init_banksize(void)
23 {
24 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
25 	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
26 }
27 
28 
29 int board_prepare_usb(enum usb_init_type type)
30 {
31 	static struct udevice *pmic_gpio;
32 	static struct gpio_desc hub_reset, usb_sel;
33 	int ret = 0, node;
34 
35 	if (!pmic_gpio) {
36 		ret = uclass_get_device_by_name(UCLASS_GPIO,
37 						"pm8916_gpios@c000",
38 						&pmic_gpio);
39 		if (ret < 0) {
40 			printf("Failed to find pm8916_gpios@c000 node.\n");
41 			return ret;
42 		}
43 	}
44 
45 	/* Try to request gpios needed to start usb host on dragonboard */
46 	if (!dm_gpio_is_valid(&hub_reset)) {
47 		node = fdt_subnode_offset(gd->fdt_blob, pmic_gpio->of_offset,
48 					  "usb_hub_reset_pm");
49 		if (node < 0) {
50 			printf("Failed to find usb_hub_reset_pm dt node.\n");
51 			return node;
52 		}
53 		ret = gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0,
54 						 &hub_reset, 0);
55 		if (ret < 0) {
56 			printf("Failed to request usb_hub_reset_pm gpio.\n");
57 			return ret;
58 		}
59 	}
60 
61 	if (!dm_gpio_is_valid(&usb_sel)) {
62 		node = fdt_subnode_offset(gd->fdt_blob, pmic_gpio->of_offset,
63 					  "usb_sw_sel_pm");
64 		if (node < 0) {
65 			printf("Failed to find usb_sw_sel_pm dt node.\n");
66 			return 0;
67 		}
68 		ret = gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0,
69 						 &usb_sel, 0);
70 		if (ret < 0) {
71 			printf("Failed to request usb_sw_sel_pm gpio.\n");
72 			return ret;
73 		}
74 	}
75 
76 	if (type == USB_INIT_HOST) {
77 		/* Start USB Hub */
78 		dm_gpio_set_dir_flags(&hub_reset,
79 				      GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
80 		mdelay(100);
81 		/* Switch usb to host connectors */
82 		dm_gpio_set_dir_flags(&usb_sel,
83 				      GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
84 		mdelay(100);
85 	} else { /* Device */
86 		/* Disable hub */
87 		dm_gpio_set_dir_flags(&hub_reset, GPIOD_IS_OUT);
88 		/* Switch back to device connector */
89 		dm_gpio_set_dir_flags(&usb_sel, GPIOD_IS_OUT);
90 	}
91 
92 	return 0;
93 }
94 
95 int board_init(void)
96 {
97 	return 0;
98 }
99 
100 /* Check for vol- button - if pressed - stop autoboot */
101 int misc_init_r(void)
102 {
103 	struct udevice *pon;
104 	struct gpio_desc resin;
105 	int node, ret;
106 
107 	ret = uclass_get_device_by_name(UCLASS_GPIO, "pm8916_pon@800", &pon);
108 	if (ret < 0) {
109 		printf("Failed to find PMIC pon node. Check device tree\n");
110 		return 0;
111 	}
112 
113 	node = fdt_subnode_offset(gd->fdt_blob, pon->of_offset, "key_vol_down");
114 	if (node < 0) {
115 		printf("Failed to find key_vol_down node. Check device tree\n");
116 		return 0;
117 	}
118 
119 	if (gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0, &resin,
120 				       0)) {
121 		printf("Failed to request key_vol_down button.\n");
122 		return 0;
123 	}
124 
125 	if (dm_gpio_get_value(&resin)) {
126 		setenv("bootdelay", "-1");
127 		printf("Power button pressed - dropping to console.\n");
128 	}
129 
130 	return 0;
131 }
132