src/soc/intel/common/block/pcie/rtd3/chip.h

/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef __SOC_INTEL_COMMON_BLOCK_PCIE_RTD3_CHIP_H__
#define __SOC_INTEL_COMMON_BLOCK_PCIE_RTD3_CHIP_H__

#include <acpi/acpi_device.h>

#define RP_MUTEX_NAME "RPMX"

enum acpi_pcie_rp_pm_emit {
	ACPI_PCIE_RP_EMIT_NONE      = 0x00,   /* None            */
	ACPI_PCIE_RP_EMIT_L23       = 0x01,   /* L23             */
	ACPI_PCIE_RP_EMIT_PSD0      = 0x02,   /* PSD0            */
	ACPI_PCIE_RP_EMIT_SRCK      = 0x04,   /* SRCK            */
	ACPI_PCIE_RP_EMIT_L23_PSD0  = 0x03,   /* L23, PSD0       */
	ACPI_PCIE_RP_EMIT_L23_SRCK  = 0x05,   /* L23, SRCK       */
	ACPI_PCIE_RP_EMIT_PSD0_SRCK = 0x06,   /* PSD0, SRCK      */
	ACPI_PCIE_RP_EMIT_ALL       = 0x07    /* L23, PSD0, SRCK */
};

/* Device support at least one of enable/reset GPIO. */
struct soc_intel_common_block_pcie_rtd3_config {
	const char *desc;

	/* GPIO used to enable device. */
	struct acpi_gpio enable_gpio;
	/* Delay to be inserted after device is enabled. */
	unsigned int enable_delay_ms;
	/* Delay to be inserted after device is disabled. */
	unsigned int enable_off_delay_ms;

	/* GPIO used to take device out of reset or to put it into reset. */
	struct acpi_gpio reset_gpio;
	/* Delay to be inserted after device is taken out of reset. */
	unsigned int reset_delay_ms;
	/* Delay to be inserted after device is put into reset. */
	unsigned int reset_off_delay_ms;

	/*
	 * SRCCLK assigned to this root port which will be turned off via PMC IPC.
	 * If set to -1 then the clock will not be disabled in D3.
	 */
	int srcclk_pin;

	/* When set to true, this will add a _DSD which contains a single
	   property, `DmaProperty`, set to 1, under the ACPI Device. */
	bool add_acpi_dma_property;

	/*
	 * Add device property indicating the device provides an external PCI port
	 * for the OS to apply security restrictions.
	 */
	bool add_acpi_external_facing_port;

	/*
	 * Allow a device to add the RuntimeD3Storage property even if the detected
	 * PCI device does not identify as storage class.
	 */
	bool is_storage;

	/*
	 * Disable the ACPI-driven L23 Ready-to-Detect transition for the root port.
	 */
	bool disable_l23;

	/*
	 * Provides L23, modPHY gating, source clock enabling methods to the device
	 * connected root port, mainly used in the device ACPI methods such as reset.
	 * The methods to export are following this table:
	 *-----------------------------------------------------------------------------------*
	 | ext_pm_support | disable_l123 | srcclk_pin |   rp_type   |     exported methods   |
	 *----------------+--------------+------------+-------------+------------------------*
	 |     false      |       -      |     -      |      -      | None                   |
	 |     true       |      true    |     =0     | PCIE_RP_CPU | None                   |
	 |     true       |      true    |     =0     | PCIE_RP_PCH | SRCK                   |
	 |     true       |      true    |     >0     | PCIE_RP_CPU | PSD0                   |
	 |     true       |      true    |     >0     | PCIE_RP_PCH | PSD0, SRCK             |
	 |     true       |      false   |     =0     | PCIE_RP_CPU | L23D, LD23             |
	 |     true       |      false   |     =0     | PCIE_RP_PCH | L23D, LD23, SRCK       |
	 |     true       |      false   |     >0     | PCIE_RP_CPU | L23D, LD23, PSD0       |
	 |     true       |      false   |     >0     | PCIE_RP_PCH | L23D, LD23, PSD0, SRCK |
	 *-----------------------------------------------------------------------------------*
	 */
	enum acpi_pcie_rp_pm_emit ext_pm_support;

	/*
	 * Add support to skip _OFF and _ON execution when needed, such as reloading
	 * the device driver.
	 */
	bool skip_on_off_support;

	/*
	 * Indicates the root port mutex is used for _ON and _OFF, the companion device driver
	 * such as WWAN driver should also acquire this mutex in methods that access the same HW
	 * resource, such as PERST# GPIO pin.
	 */
	bool use_rp_mutex;
};

#endif /* __SOC_INTEL_COMMON_BLOCK_PCIE_RTD3_CHIP_H__ */