mirror of
https://github.com/u-boot/u-boot.git
synced 2024-12-05 18:43:27 +08:00
3e57ad907c
This function is available but not exported. More generally it does not really work as intended. Reimplement it and add a sandbox test too. Signed-off-by: Simon Glass <sjg@chromium.org>
299 lines
8.4 KiB
C
299 lines
8.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* IRQ is a type of interrupt controller used on recent Intel SoC.
|
|
*
|
|
* Copyright 2019 Google LLC
|
|
*/
|
|
|
|
#ifndef __irq_H
|
|
#define __irq_H
|
|
|
|
struct acpi_irq;
|
|
struct ofnode_phandle_args;
|
|
|
|
/*
|
|
* Interrupt controller types available. You can find a particular one with
|
|
* irq_first_device_type()
|
|
*/
|
|
enum irq_dev_t {
|
|
X86_IRQT_BASE, /* Base controller */
|
|
X86_IRQT_ITSS, /* ITSS controller, e.g. on APL */
|
|
X86_IRQT_ACPI_GPE, /* ACPI General-Purpose Events controller */
|
|
SANDBOX_IRQT_BASE, /* Sandbox testing */
|
|
};
|
|
|
|
/**
|
|
* struct irq - A single irq line handled by an interrupt controller
|
|
*
|
|
* @dev: IRQ device that handles this irq
|
|
* @id: ID to identify this irq with the device
|
|
* @flags: Flags associated with this interrupt (IRQ_TYPE_...)
|
|
*/
|
|
struct irq {
|
|
struct udevice *dev;
|
|
ulong id;
|
|
ulong flags;
|
|
};
|
|
|
|
/**
|
|
* struct irq_ops - Operations for the IRQ
|
|
*
|
|
* Each IRQ device can handle mulitple IRQ lines
|
|
*/
|
|
struct irq_ops {
|
|
/**
|
|
* route_pmc_gpio_gpe() - Get the GPIO for an event
|
|
*
|
|
* @dev: IRQ device
|
|
* @pmc_gpe_num: Event number to check
|
|
* @returns GPIO for the event, or -ENOENT if none
|
|
*/
|
|
int (*route_pmc_gpio_gpe)(struct udevice *dev, uint pmc_gpe_num);
|
|
|
|
/**
|
|
* set_polarity() - Set the IRQ polarity
|
|
*
|
|
* @dev: IRQ device
|
|
* @irq: Interrupt number to set
|
|
* @active_low: true if active low, false for active high
|
|
* @return 0 if OK, -EINVAL if @irq is invalid
|
|
*/
|
|
int (*set_polarity)(struct udevice *dev, uint irq, bool active_low);
|
|
|
|
/**
|
|
* snapshot_polarities() - record IRQ polarities for later restore
|
|
*
|
|
* @dev: IRQ device
|
|
* @return 0
|
|
*/
|
|
int (*snapshot_polarities)(struct udevice *dev);
|
|
|
|
/**
|
|
* restore_polarities() - restore IRQ polarities
|
|
*
|
|
* @dev: IRQ device
|
|
* @return 0
|
|
*/
|
|
int (*restore_polarities)(struct udevice *dev);
|
|
|
|
/**
|
|
* read_and_clear() - get the value of an interrupt and clear it
|
|
*
|
|
* Clears the interrupt if pending
|
|
*
|
|
* @irq: IRQ line
|
|
* @return 0 if interrupt is not pending, 1 if it was (and so has been
|
|
* cleared), -ve on error
|
|
*/
|
|
int (*read_and_clear)(struct irq *irq);
|
|
/**
|
|
* of_xlate - Translate a client's device-tree (OF) irq specifier.
|
|
*
|
|
* The irq core calls this function as the first step in implementing
|
|
* a client's irq_get_by_*() call.
|
|
*
|
|
* If this function pointer is set to NULL, the irq core will use a
|
|
* default implementation, which assumes #interrupt-cells = <1>, and
|
|
* that the DT cell contains a simple integer irq ID.
|
|
*
|
|
* @irq: The irq struct to hold the translation result.
|
|
* @args: The irq specifier values from device tree.
|
|
* @return 0 if OK, or a negative error code.
|
|
*/
|
|
int (*of_xlate)(struct irq *irq, struct ofnode_phandle_args *args);
|
|
/**
|
|
* request - Request a translated irq.
|
|
*
|
|
* The irq core calls this function as the second step in
|
|
* implementing a client's irq_get_by_*() call, following a successful
|
|
* xxx_xlate() call, or as the only step in implementing a client's
|
|
* irq_request() call.
|
|
*
|
|
* @irq: The irq struct to request; this has been fille in by
|
|
* a previoux xxx_xlate() function call, or by the caller
|
|
* of irq_request().
|
|
* @return 0 if OK, or a negative error code.
|
|
*/
|
|
int (*request)(struct irq *irq);
|
|
/**
|
|
* free - Free a previously requested irq.
|
|
*
|
|
* This is the implementation of the client irq_free() API.
|
|
*
|
|
* @irq: The irq to free.
|
|
* @return 0 if OK, or a negative error code.
|
|
*/
|
|
int (*free)(struct irq *irq);
|
|
|
|
#if CONFIG_IS_ENABLED(ACPIGEN)
|
|
/**
|
|
* get_acpi() - Get the ACPI info for an irq
|
|
*
|
|
* This converts a irq to an ACPI structure for adding to the ACPI
|
|
* tables.
|
|
*
|
|
* @irq: irq to convert
|
|
* @acpi_irq: Output ACPI interrupt information
|
|
* @return ACPI pin number or -ve on error
|
|
*/
|
|
int (*get_acpi)(const struct irq *irq, struct acpi_irq *acpi_irq);
|
|
#endif
|
|
};
|
|
|
|
#define irq_get_ops(dev) ((struct irq_ops *)(dev)->driver->ops)
|
|
|
|
/**
|
|
* irq_is_valid() - Check if an IRQ is valid
|
|
*
|
|
* @irq: IRQ description containing device and ID, e.g. previously
|
|
* returned by irq_get_by_index()
|
|
* @return true if valid, false if not
|
|
*/
|
|
static inline bool irq_is_valid(const struct irq *irq)
|
|
{
|
|
return irq->dev != NULL;
|
|
}
|
|
|
|
/**
|
|
* irq_route_pmc_gpio_gpe() - Get the GPIO for an event
|
|
*
|
|
* @dev: IRQ device
|
|
* @pmc_gpe_num: Event number to check
|
|
* @returns GPIO for the event, or -ENOENT if none
|
|
*/
|
|
int irq_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num);
|
|
|
|
/**
|
|
* irq_set_polarity() - Set the IRQ polarity
|
|
*
|
|
* @dev: IRQ device
|
|
* @irq: Interrupt number to set
|
|
* @active_low: true if active low, false for active high
|
|
* @return 0 if OK, -EINVAL if @irq is invalid
|
|
*/
|
|
int irq_set_polarity(struct udevice *dev, uint irq, bool active_low);
|
|
|
|
/**
|
|
* irq_snapshot_polarities() - record IRQ polarities for later restore
|
|
*
|
|
* @dev: IRQ device
|
|
* @return 0
|
|
*/
|
|
int irq_snapshot_polarities(struct udevice *dev);
|
|
|
|
/**
|
|
* irq_restore_polarities() - restore IRQ polarities
|
|
*
|
|
* @dev: IRQ device
|
|
* @return 0
|
|
*/
|
|
int irq_restore_polarities(struct udevice *dev);
|
|
|
|
/**
|
|
* read_and_clear() - get the value of an interrupt and clear it
|
|
*
|
|
* Clears the interrupt if pending
|
|
*
|
|
* @dev: IRQ device
|
|
* @return 0 if interrupt is not pending, 1 if it was (and so has been
|
|
* cleared), -ve on error
|
|
*/
|
|
int irq_read_and_clear(struct irq *irq);
|
|
|
|
struct phandle_2_arg;
|
|
/**
|
|
* irq_get_by_phandle() - Get an irq by its phandle information (of-platadata)
|
|
*
|
|
* This function is used when of-platdata is enabled.
|
|
*
|
|
* This looks up an irq using the phandle info. With dtoc, each phandle in the
|
|
* 'interrupts-extended ' property is transformed into an idx representing the
|
|
* device. For example:
|
|
*
|
|
* interrupts-extended = <&acpi_gpe 0x3c 0>;
|
|
*
|
|
* might result in:
|
|
*
|
|
* .interrupts_extended = {6, {0x3c, 0}},},
|
|
*
|
|
* indicating that the irq is udevice idx 6 in dt-plat.c with a arguments of
|
|
* 0x3c and 0.This function can return a valid irq given the above
|
|
* information. In this example it would return an irq containing the
|
|
* 'acpi_gpe' device and the irq ID 0x3c.
|
|
*
|
|
* @dev: Device containing the phandle
|
|
* @cells: Phandle info
|
|
* @irq: A pointer to a irq struct to initialise
|
|
* @return 0 if OK, or a negative error code
|
|
*/
|
|
int irq_get_by_phandle(struct udevice *dev, const struct phandle_2_arg *cells,
|
|
struct irq *irq);
|
|
|
|
/**
|
|
* irq_get_by_index - Get/request an irq by integer index.
|
|
*
|
|
* This looks up and requests an irq. The index is relative to the client
|
|
* device; each device is assumed to have n irqs associated with it somehow,
|
|
* and this function finds and requests one of them. The mapping of client
|
|
* device irq indices to provider irqs may be via device-tree
|
|
* properties, board-provided mapping tables, or some other mechanism.
|
|
*
|
|
* @dev: The client device.
|
|
* @index: The index of the irq to request, within the client's list of
|
|
* irqs.
|
|
* @irq: A pointer to a irq struct to initialise.
|
|
* @return 0 if OK, or a negative error code.
|
|
*/
|
|
int irq_get_by_index(struct udevice *dev, int index, struct irq *irq);
|
|
|
|
/**
|
|
* irq_request - Request a irq by provider-specific ID.
|
|
*
|
|
* This requests a irq using a provider-specific ID. Generally, this function
|
|
* should not be used, since irq_get_by_index/name() provide an interface that
|
|
* better separates clients from intimate knowledge of irq providers.
|
|
* However, this function may be useful in core SoC-specific code.
|
|
*
|
|
* @dev: The irq provider device.
|
|
* @irq: A pointer to a irq struct to initialise. The caller must
|
|
* have already initialised any field in this struct which the
|
|
* irq provider uses to identify the irq.
|
|
* @return 0 if OK, or a negative error code.
|
|
*/
|
|
int irq_request(struct udevice *dev, struct irq *irq);
|
|
|
|
/**
|
|
* irq_free - Free a previously requested irq.
|
|
*
|
|
* @irq: A irq struct that was previously successfully requested by
|
|
* irq_request/get_by_*().
|
|
* @return 0 if OK, or a negative error code.
|
|
*/
|
|
int irq_free(struct irq *irq);
|
|
|
|
/**
|
|
* irq_first_device_type() - Get a particular interrupt controller
|
|
*
|
|
* On success this returns an activated interrupt device.
|
|
*
|
|
* @type: Type to find
|
|
* @devp: Returns the device, if found
|
|
* @return 0 if OK, -ENODEV if not found, other -ve error if uclass failed to
|
|
* probe
|
|
*/
|
|
int irq_first_device_type(enum irq_dev_t type, struct udevice **devp);
|
|
|
|
/**
|
|
* irq_get_acpi() - Get the ACPI info for an irq
|
|
*
|
|
* This converts a irq to an ACPI structure for adding to the ACPI
|
|
* tables.
|
|
*
|
|
* @irq: irq to convert
|
|
* @acpi_irq: Output ACPI interrupt information
|
|
* @return ACPI pin number or -ve on error
|
|
*/
|
|
int irq_get_acpi(const struct irq *irq, struct acpi_irq *acpi_irq);
|
|
|
|
#endif
|