board/qualcomm/dragonboard410c/dragonboard410c.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Board init file for Dragonboard 410C
   4  *
   5  * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <usb.h>
  11 #include <asm/gpio.h>
  12 #include <fdt_support.h>
  13 #include <environment.h>
  14 #include <asm/arch/dram.h>
  15 #include <asm/arch/misc.h>
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 /* pointer to the device tree ammended by the firmware */
  20 extern void *fw_dtb;
  21
  22 void *board_fdt_blob_setup(void)
  23 {
  24         if (fdt_magic(fw_dtb) != FDT_MAGIC) {
  25                 printf("Firmware provided invalid dtb!\n");
  26                 return NULL;
  27         }
  28
  29         return fw_dtb;
  30 }
  31
  32 int dram_init(void)
  33 {
  34         gd->ram_size = PHYS_SDRAM_1_SIZE;
  35
  36         return 0;
  37 }
  38
  39 int dram_init_banksize(void)
  40 {
  41         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  42         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
  43
  44         return 0;
  45 }
  46
  47 int board_prepare_usb(enum usb_init_type type)
  48 {
  49         static struct udevice *pmic_gpio;
  50         static struct gpio_desc hub_reset, usb_sel;
  51         int ret = 0, node;
  52
  53         if (!pmic_gpio) {
  54                 ret = uclass_get_device_by_name(UCLASS_GPIO,
  55                                                 "pm8916_gpios@c000",
  56                                                 &pmic_gpio);
  57                 if (ret < 0) {
  58                         printf("Failed to find pm8916_gpios@c000 node.\n");
  59                         return ret;
  60                 }
  61         }
  62
  63         /* Try to request gpios needed to start usb host on dragonboard */
  64         if (!dm_gpio_is_valid(&hub_reset)) {
  65                 node = fdt_subnode_offset(gd->fdt_blob,
  66                                           dev_of_offset(pmic_gpio),
  67                                           "usb_hub_reset_pm");
  68                 if (node < 0) {
  69                         printf("Failed to find usb_hub_reset_pm dt node.\n");
  70                         return node;
  71                 }
  72                 ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
  73                                                  "gpios", 0, &hub_reset, 0);
  74                 if (ret < 0) {
  75                         printf("Failed to request usb_hub_reset_pm gpio.\n");
  76                         return ret;
  77                 }
  78         }
  79
  80         if (!dm_gpio_is_valid(&usb_sel)) {
  81                 node = fdt_subnode_offset(gd->fdt_blob,
  82                                           dev_of_offset(pmic_gpio),
  83                                           "usb_sw_sel_pm");
  84                 if (node < 0) {
  85                         printf("Failed to find usb_sw_sel_pm dt node.\n");
  86                         return 0;
  87                 }
  88                 ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
  89                                                  "gpios", 0, &usb_sel, 0);
  90                 if (ret < 0) {
  91                         printf("Failed to request usb_sw_sel_pm gpio.\n");
  92                         return ret;
  93                 }
  94         }
  95
  96         if (type == USB_INIT_HOST) {
  97                 /* Start USB Hub */
  98                 dm_gpio_set_dir_flags(&hub_reset,
  99                                       GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
 100                 mdelay(100);
 101                 /* Switch usb to host connectors */
 102                 dm_gpio_set_dir_flags(&usb_sel,
 103                                       GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
 104                 mdelay(100);
 105         } else { /* Device */
 106                 /* Disable hub */
 107                 dm_gpio_set_dir_flags(&hub_reset, GPIOD_IS_OUT);
 108                 /* Switch back to device connector */
 109                 dm_gpio_set_dir_flags(&usb_sel, GPIOD_IS_OUT);
 110         }
 111
 112         return 0;
 113 }
 114
 115 /* Check for vol- button - if pressed - stop autoboot */
 116 int misc_init_r(void)
 117 {
 118         struct udevice *pon;
 119         struct gpio_desc resin;
 120         int node, ret;
 121
 122         ret = uclass_get_device_by_name(UCLASS_GPIO, "pm8916_pon@800", &pon);
 123         if (ret < 0) {
 124                 printf("Failed to find PMIC pon node. Check device tree\n");
 125                 return 0;
 126         }
 127
 128         node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(pon),
 129                                   "key_vol_down");
 130         if (node < 0) {
 131                 printf("Failed to find key_vol_down node. Check device tree\n");
 132                 return 0;
 133         }
 134
 135         if (gpio_request_by_name_nodev(offset_to_ofnode(node), "gpios", 0,
 136                                        &resin, 0)) {
 137                 printf("Failed to request key_vol_down button.\n");
 138                 return 0;
 139         }
 140
 141         if (dm_gpio_get_value(&resin)) {
 142                 env_set("bootdelay", "-1");
 143                 printf("Power button pressed - dropping to console.\n");
 144         }
 145
 146         return 0;
 147 }
 148
 149 int board_init(void)
 150 {
 151         return 0;
 152 }
 153
 154 /* Fixup of DTB for Linux Kernel
 155  * 1. Fixup installed DRAM.
 156  * 2. Fixup WLAN/BT Mac address:
 157  *      First, check if MAC addresses for WLAN/BT exists as environemnt
 158  *      variables wlanaddr,btaddr. if not, generate a unique address.
 159  */
 160
 161 int ft_board_setup(void *blob, bd_t *bd)
 162 {
 163         u8 mac[ARP_HLEN];
 164
 165         msm_fixup_memory(blob);
 166
 167         if (!eth_env_get_enetaddr("wlanaddr", mac)) {
 168                 msm_generate_mac_addr(mac);
 169         };
 170
 171         do_fixup_by_compat(blob, "qcom,wcnss-wlan",
 172                            "local-mac-address", mac, ARP_HLEN, 1);
 173
 174
 175         if (!eth_env_get_enetaddr("btaddr", mac)) {
 176                 msm_generate_mac_addr(mac);
 177
 178 /* The BD address is same as WLAN MAC address but with
 179  * least significant bit flipped.
 180  */
 181                 mac[0] ^= 0x01;
 182         };
 183
 184         do_fixup_by_compat(blob, "qcom,wcnss-bt",
 185                            "local-bd-address", mac, ARP_HLEN, 1);
 186         return 0;
 187 }
 188
 189 void reset_cpu(ulong addr)
 190 {
 191         psci_system_reset();
 192 }