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