board/qualcomm/dragonboard410c/dragonboard410c.c

   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 }