src/mainboard/google/guybrush/bootblock.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <amdblocks/espi.h>
   4 #include <bootblock_common.h>
   5 #include <baseboard/variants.h>
   6 #include <console/console.h>
   7 #include <delay.h>
   8 #include <soc/espi.h>
   9 #include <soc/southbridge.h>
  10 #include <timer.h>
  11
  12 #define FC350_PCIE_INIT_DELAY_US (20 * USECS_PER_MSEC)
  13 struct stopwatch pcie_init_timeout_sw;
  14
  15 void mb_set_up_early_espi(void)
  16 {
  17         /*
  18          * We don't need to initialize all of the GPIOs that are done
  19          * in bootblock_mainboard_early_init(), but we need to release
  20          * the EC eSPI reset and do the rest of the configuration.
  21          *
  22          * This will not be present in the normal boot flow.
  23          */
  24         bootblock_mainboard_early_init();
  25 }
  26
  27 void bootblock_mainboard_early_init(void)
  28 {
  29         size_t num_gpios, override_num_gpios;
  30         const struct soc_amd_gpio *gpios, *override_gpios;
  31
  32         espi_disable_lpc_ldrq();
  33
  34         /*
  35          * All LPC decodes need to be cleared before we can configure the LPC pads as secondary
  36          * eSPI interface that gets used for the EC communication. This is already done by
  37          * lpc_disable_decodes that gets called before this function.
  38          */
  39
  40         if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK))
  41                 return;
  42
  43         gpios = variant_espi_gpio_table(&num_gpios);
  44         gpio_configure_pads(gpios, num_gpios);
  45
  46         gpios = variant_tpm_gpio_table(&num_gpios);
  47         gpio_configure_pads(gpios, num_gpios);
  48
  49         gpios = variant_early_gpio_table(&num_gpios);
  50         override_gpios = variant_early_override_gpio_table(&override_num_gpios);
  51         gpio_configure_pads_with_override(gpios, num_gpios, override_gpios, override_num_gpios);
  52
  53         /* Set a timer to make sure there's enough delay for
  54          * the Fibocom 350 PCIe init
  55          */
  56         stopwatch_init_usecs_expire(&pcie_init_timeout_sw, FC350_PCIE_INIT_DELAY_US);
  57
  58         /* Early eSPI interface configuration */
  59
  60         espi_switch_to_spi2_pads();
  61 }
  62
  63 void bootblock_mainboard_init(void)
  64 {
  65         size_t base_num_gpios, override_num_gpios;
  66         const struct soc_amd_gpio *base_gpios, *override_gpios;
  67         int i = 0;
  68
  69         /* Make sure that at least 20ms has elapsed since enabling WWAN power
  70          * in bootblock_mainboard_early_init.
  71          * This is only applicable if verstage is not in the PSP and the board
  72          * is using the fibocom 350 WLAN card, so this typically will not be hit.
  73          */
  74         if (!CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK) && variant_has_pcie_wwan()) {
  75                 while (!stopwatch_expired(&pcie_init_timeout_sw)) {
  76                         mdelay(1);
  77                         i++;
  78                 };
  79                 if (i)
  80                         printk(BIOS_DEBUG, "Delayed %d ms for PCIe\n", i);
  81         }
  82
  83         base_gpios = variant_bootblock_gpio_table(&base_num_gpios);
  84         override_gpios = variant_bootblock_override_gpio_table(&override_num_gpios);
  85
  86         gpio_configure_pads_with_override(base_gpios, base_num_gpios, override_gpios,
  87                                           override_num_gpios);
  88 }