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 int 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 	return 0;
28 }
29 
30 
31 int board_prepare_usb(enum usb_init_type type)
32 {
33 	static struct udevice *pmic_gpio;
34 	static struct gpio_desc hub_reset, usb_sel;
35 	int ret = 0, node;
36 
37 	if (!pmic_gpio) {
38 		ret = uclass_get_device_by_name(UCLASS_GPIO,
39 						"pm8916_gpios@c000",
40 						&pmic_gpio);
41 		if (ret < 0) {
42 			printf("Failed to find pm8916_gpios@c000 node.\n");
43 			return ret;
44 		}
45 	}
46 
47 	/* Try to request gpios needed to start usb host on dragonboard */
48 	if (!dm_gpio_is_valid(&hub_reset)) {
49 		node = fdt_subnode_offset(gd->fdt_blob,
50 					  dev_of_offset(pmic_gpio),
51 					  "usb_hub_reset_pm");
52 		if (node < 0) {
53 			printf("Failed to find usb_hub_reset_pm dt node.\n");
54 			return node;
55 		}
56 		ret = gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0,
57 						 &hub_reset, 0);
58 		if (ret < 0) {
59 			printf("Failed to request usb_hub_reset_pm gpio.\n");
60 			return ret;
61 		}
62 	}
63 
64 	if (!dm_gpio_is_valid(&usb_sel)) {
65 		node = fdt_subnode_offset(gd->fdt_blob,
66 					  dev_of_offset(pmic_gpio),
67 					  "usb_sw_sel_pm");
68 		if (node < 0) {
69 			printf("Failed to find usb_sw_sel_pm dt node.\n");
70 			return 0;
71 		}
72 		ret = gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0,
73 						 &usb_sel, 0);
74 		if (ret < 0) {
75 			printf("Failed to request usb_sw_sel_pm gpio.\n");
76 			return ret;
77 		}
78 	}
79 
80 	if (type == USB_INIT_HOST) {
81 		/* Start USB Hub */
82 		dm_gpio_set_dir_flags(&hub_reset,
83 				      GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
84 		mdelay(100);
85 		/* Switch usb to host connectors */
86 		dm_gpio_set_dir_flags(&usb_sel,
87 				      GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
88 		mdelay(100);
89 	} else { /* Device */
90 		/* Disable hub */
91 		dm_gpio_set_dir_flags(&hub_reset, GPIOD_IS_OUT);
92 		/* Switch back to device connector */
93 		dm_gpio_set_dir_flags(&usb_sel, GPIOD_IS_OUT);
94 	}
95 
96 	return 0;
97 }
98 
99 int board_init(void)
100 {
101 	return 0;
102 }
103 
104 /* Check for vol- button - if pressed - stop autoboot */
105 int misc_init_r(void)
106 {
107 	struct udevice *pon;
108 	struct gpio_desc resin;
109 	int node, ret;
110 
111 	ret = uclass_get_device_by_name(UCLASS_GPIO, "pm8916_pon@800", &pon);
112 	if (ret < 0) {
113 		printf("Failed to find PMIC pon node. Check device tree\n");
114 		return 0;
115 	}
116 
117 	node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(pon),
118 				  "key_vol_down");
119 	if (node < 0) {
120 		printf("Failed to find key_vol_down node. Check device tree\n");
121 		return 0;
122 	}
123 
124 	if (gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0, &resin,
125 				       0)) {
126 		printf("Failed to request key_vol_down button.\n");
127 		return 0;
128 	}
129 
130 	if (dm_gpio_get_value(&resin)) {
131 		setenv("bootdelay", "-1");
132 		printf("Power button pressed - dropping to console.\n");
133 	}
134 
135 	return 0;
136 }
137