acpi_pmc.h
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2019 Google LLC
*/
#ifndef __ACPI_PMC_H
#define __ACPI_PMC_H
enum {
GPE0_REG_MAX = 4,
};
/**
* struct acpi_pmc_upriv - holds common data for the x86 PMC
*
* @pmc_bar0: Base address 0 of PMC
* @pmc_bar1: Base address 2 of PMC
* @acpi_base: Base address of ACPI block
* @pm1_sts: PM1 status
* @pm1_en: PM1 enable
* @pm1_cnt: PM1 control
* @gpe_cfg: Address of GPE_CFG register
* @gpe0_dwx_mask: Mask to use for each GPE0 (typically 7 or 0xf)
* @gpe0_dwx_shift_base: Base shift value to use for GPE0 (0 or 4)
* @gpe0_sts_req: GPE0 status register offset
* @gpe0_en_req: GPE0 enable register offset
* @gpe0_sts: GPE0 status values
* @gpe0_en: GPE0 enable values
* @gpe0_dw: GPE0 DW values
* @gpe0_count: Number of GPE0 registers
* @tco1_sts: TCO1 status
* @tco2_sts: TCO2 status
* @prsts: Power and reset status
* @gen_pmcon1: General power mgmt configuration 1
* @gen_pmcon2: General power mgmt configuration 2
* @gen_pmcon3: General power mgmt configuration 3
*/
struct acpi_pmc_upriv {
void *pmc_bar0;
void *pmc_bar2;
u32 acpi_base;
u16 pm1_sts;
u16 pm1_en;
u32 pm1_cnt;
u32 *gpe_cfg;
u32 gpe0_dwx_mask;
u32 gpe0_dwx_shift_base;
u32 gpe0_sts_reg;
u32 gpe0_en_reg;
u32 gpe0_sts[GPE0_REG_MAX];
u32 gpe0_en[GPE0_REG_MAX];
u32 gpe0_dw[GPE0_REG_MAX];
int gpe0_count;
u16 tco1_sts;
u16 tco2_sts;
u32 prsts;
u32 gen_pmcon1;
u32 gen_pmcon2;
u32 gen_pmcon3;
};
struct acpi_pmc_ops {
/**
* init() - Set up the PMC for use
*
* This reads the current state of the PMC. Most of the state is read
* automatically by the uclass since it is common.
*
* This is optional.
*
* @dev: PMC device to use
* @return 0 if OK, -ve on error
*/
int (*init)(struct udevice *dev);
/**
* prev_sleep_state() - Get the previous sleep state (optional)
*
* This reads various state registers and returns the sleep state from
* which the system woke. If this method is not provided, the uclass
* will return a calculated value.
*
* This is optional.
*
* @dev: PMC device to use
* @prev_sleep_state: Previous sleep state as calculated by the uclass.
* The method can use this as the return value or calculate its
* own.
*
* @return enum acpi_sleep_state indicating the previous sleep state
* (ACPI_S0, ACPI_S3 or ACPI_S5), or -ve on error
*/
int (*prev_sleep_state)(struct udevice *dev, int prev_sleep_state);
/**
* disable_tco() - Disable the timer/counter
*
* Disables the timer/counter in the PMC
*
* This is optional.
*
* @dev: PMC device to use
* @return 0
*/
int (*disable_tco)(struct udevice *dev);
/**
* global_reset_set_enable() - Enable/Disable global reset
*
* Enable or disable global reset. If global reset is enabled, both hard
* reset and soft reset will trigger global reset, where both host and
* TXE are reset. This is cleared on cold boot, hard reset, soft reset
* and Sx.
*
* This is optional.
*
* @dev: PMC device to use
* @enable: true to enable global reset, false to disable
* @return 0
*/
int (*global_reset_set_enable)(struct udevice *dev, bool enable);
};
#define acpi_pmc_get_ops(dev) ((struct acpi_pmc_ops *)(dev)->driver->ops)
/**
* init() - Set up the PMC for use
*
* This reads the current state of the PMC. This reads in the common registers,
* then calls the device's init() method to read the SoC-specific registers.
*
* @return 0 if OK, -ve on error
*/
int pmc_init(struct udevice *dev);
/**
* pmc_prev_sleep_state() - Get the previous sleep state
*
* This reads various state registers and returns the sleep state from
* which the system woke.
*
* @return enum acpi_sleep_state indicating the previous sleep state
* (ACPI_S0, ACPI_S3 or ACPI_S5), or -ve on error
*/
int pmc_prev_sleep_state(struct udevice *dev);
/**
* pmc_disable_tco() - Disable the timer/counter
*
* Disables the timer/counter in the PMC
*
* @dev: PMC device to use
* @return 0
*/
int pmc_disable_tco(struct udevice *dev);
/**
* pmc_global_reset_set_enable() - Enable/Disable global reset
*
* Enable or disable global reset. If global reset is enabled, both hard
* reset and soft reset will trigger global reset, where both host and
* TXE are reset. This is cleared on cold boot, hard reset, soft reset
* and Sx.
*
* @dev: PMC device to use
* @enable: true to enable global reset, false to disable
* @return 0
*/
int pmc_global_reset_set_enable(struct udevice *dev, bool enable);
int pmc_ofdata_to_uc_platdata(struct udevice *dev);
int pmc_disable_tco_base(ulong tco_base);
void pmc_dump_info(struct udevice *dev);
/**
* pmc_gpe_init() - Set up general-purpose events
*
* @dev: PMC device
* @return 0 if OK, -ve on error
*/
int pmc_gpe_init(struct udevice *dev);
#endif