src/mainboard/intel/galileo/gpio.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <soc/car.h>
   5 #include <soc/ramstage.h>
   6 #include "reg_access.h"
   7 #include "gen1.h"
   8 #include "gen2.h"
   9
  10 void car_mainboard_pre_console_init(void)
  11 {
  12         const struct reg_script *script;
  13
  14         /* Initialize the GPIO controllers */
  15         if (CONFIG(GALILEO_GEN2))
  16                 script = gen2_gpio_init;
  17         else
  18                 script = gen1_gpio_init;
  19         reg_script_run(script);
  20
  21         /* Initialize the RXD and TXD paths for UART0 */
  22         if (CONFIG(ENABLE_BUILTIN_HSUART0)) {
  23                 if (CONFIG(GALILEO_GEN2))
  24                         script = gen2_hsuart0;
  25                 else
  26                         script = (reg_legacy_gpio_read(
  27                                 R_QNC_GPIO_RGLVL_RESUME_WELL)
  28                                 & GALILEO_DETERMINE_IOEXP_SLA_RESUMEWELL_GPIO)
  29                                 ? gen1_hsuart0_0x20 : gen1_hsuart0_0x21;
  30                 reg_script_run(script);
  31         }
  32 }
  33
  34 void mainboard_gpio_i2c_init(struct device *dev)
  35 {
  36         const struct reg_script *script;
  37
  38         printk(BIOS_INFO, "Galileo I2C chip initialization\n");
  39
  40         /* Determine the correct script for the board */
  41         if (CONFIG(GALILEO_GEN2))
  42                 script = gen2_i2c_init;
  43         else
  44                 /* Determine which I2C address is in use */
  45                 script = (reg_legacy_gpio_read(R_QNC_GPIO_RGLVL_RESUME_WELL)
  46                         & GALILEO_DETERMINE_IOEXP_SLA_RESUMEWELL_GPIO)
  47                         ? gen1_i2c_0x20_init : gen1_i2c_0x21_init;
  48
  49         /* Initialize the I2C chips */
  50         reg_script_run(script);
  51 }
  52
  53 void mainboard_gpio_pcie_reset(uint32_t pin_value)
  54 {
  55         uint32_t pin_number;
  56         uint32_t value;
  57
  58         /* Determine the correct PCIe reset pin */
  59         if (CONFIG(GALILEO_GEN2))
  60                 pin_number = GEN2_PCI_RESET_RESUMEWELL_GPIO;
  61         else
  62                 pin_number = GEN1_PCI_RESET_RESUMEWELL_GPIO;
  63
  64         /* Update the PCIe reset value */
  65         value = reg_legacy_gpio_read(R_QNC_GPIO_RGLVL_RESUME_WELL);
  66         value = (value & ~(1 << pin_number)) | ((pin_value & 1) << pin_number);
  67         reg_legacy_gpio_write(R_QNC_GPIO_RGLVL_RESUME_WELL, value);
  68 }