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/* SPDX-License-Identifier: GPL-2.0-only */
#include <baseboard/variants.h>
#include <console/console.h>
#include <gpio.h>
#include <soc/platform_descriptors.h>
#include <types.h>
static const fsp_dxio_descriptor emmc_dxio_descriptors[] = {
{
/* WLAN */
.engine_type = PCIE_ENGINE,
.port_present = true,
.start_logical_lane = 0,
.end_logical_lane = 0,
.device_number = PCI_SLOT(WLAN_DEVFN),
.function_number = PCI_FUNC(WLAN_DEVFN),
.link_speed_capability = GEN3,
.turn_off_unused_lanes = true,
.link_aspm = ASPM_L1,
.link_aspm_L1_1 = true,
.link_aspm_L1_2 = true,
.clk_req = CLK_REQ2,
},
{
/* eMMC */
.engine_type = PCIE_ENGINE,
.port_present = true,
.start_logical_lane = 1,
.end_logical_lane = 1,
.device_number = PCI_SLOT(SD_DEVFN),
.function_number = PCI_FUNC(SD_DEVFN),
.link_speed_capability = GEN3,
.turn_off_unused_lanes = true,
.link_aspm = ASPM_L1,
.link_aspm_L1_1 = true,
.link_aspm_L1_2 = true,
.gpio_group_id = GPIO_6,
.clk_req = CLK_REQ1,
},
};
static const fsp_dxio_descriptor nvme_dxio_descriptors[] = {
{
/* WLAN */
.engine_type = PCIE_ENGINE,
.port_present = true,
.start_logical_lane = 0,
.end_logical_lane = 0,
.device_number = PCI_SLOT(WLAN_DEVFN),
.function_number = PCI_FUNC(WLAN_DEVFN),
.link_speed_capability = GEN3,
.turn_off_unused_lanes = true,
.link_aspm = ASPM_L1,
.link_aspm_L1_1 = true,
.link_aspm_L1_2 = true,
.clk_req = CLK_REQ2,
},
{
/* SSD */
.engine_type = PCIE_ENGINE,
.port_present = true,
.start_logical_lane = 2,
.end_logical_lane = 3,
.device_number = PCI_SLOT(NVME_DEVFN),
.function_number = PCI_FUNC(NVME_DEVFN),
.link_speed_capability = GEN3,
.turn_off_unused_lanes = true,
.link_aspm = ASPM_L1,
.link_aspm_L1_1 = true,
.link_aspm_L1_2 = true,
.gpio_group_id = GPIO_6,
.clk_req = CLK_REQ0,
},
};
#define NVME_CLKREQ_GPIO 92
void variant_get_dxio_descriptor(const fsp_dxio_descriptor **dxio_descs, size_t *dxio_num)
{
/*
* We can determine if a device is populated based on the state of the clkreq
* signal. If the device is present, the clkreq is held low by the device. If
* no device is present, clkreq is pulled high by an external pull-up.
*
* This allows checking the state of the NVMe device clkreq signal and enabling
* either eMMC or NVMe based on that.
*/
if (gpio_get(NVME_CLKREQ_GPIO)) {
printk(BIOS_DEBUG, "Enabling eMMC.\n");
*dxio_num = ARRAY_SIZE(emmc_dxio_descriptors);
*dxio_descs = emmc_dxio_descriptors;
} else {
printk(BIOS_DEBUG, "Enabling NVMe.\n");
*dxio_num = ARRAY_SIZE(nvme_dxio_descriptors);
*dxio_descs = nvme_dxio_descriptors;
}
}
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