#ifndef __irq_H
#define __irq_H
+/*
+ * 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
+ */
+struct irq {
+ struct udevice *dev;
+ ulong id;
+};
+
/**
* struct irq_ops - Operations for the IRQ
+ *
+ * Each IRQ device can handle mulitple IRQ lines
*/
struct irq_ops {
/**
* @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);
};
#define irq_get_ops(dev) ((struct irq_ops *)(dev)->driver->ops)
*/
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);
+
+/**
+ * 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);
+
#endif
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