soc/intel/quark: Add PCIe reset support
Migrate PCIe reset from PlatformPciHelperLib in QuarkFspPkg into
coreboot.
Change-Id: I1c33fa16b0323091e8f9bd503bbfdb8a253a76d4
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/14944
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/intel/galileo/gpio.c b/src/mainboard/intel/galileo/gpio.c
index a411c5a..3184381 100644
--- a/src/mainboard/intel/galileo/gpio.c
+++ b/src/mainboard/intel/galileo/gpio.c
@@ -50,3 +50,20 @@
script = gen1_gpio_init;
reg_script_run(script);
}
+
+void mainboard_gpio_pcie_reset(uint32_t pin_value)
+{
+ uint32_t pin_number;
+ uint32_t value;
+
+ /* Determine the correct PCIe reset pin */
+ if (IS_ENABLED(CONFIG_GALILEO_GEN2))
+ pin_number = GEN2_PCI_RESET_RESUMEWELL_GPIO;
+ else
+ pin_number = GEN1_PCI_RESET_RESUMEWELL_GPIO;
+
+ /* Update the PCIe reset value */
+ value = reg_legacy_gpio_read(R_QNC_GPIO_RGLVL_RESUME_WELL);
+ value = (value & ~(1 << pin_number)) | ((pin_value & 1) << pin_number);
+ reg_legacy_gpio_write(R_QNC_GPIO_RGLVL_RESUME_WELL, value);
+}