When generating ACPI tables we need to convert IRQs in U-Boot to the ACPI structures required by ACPI. This is a SoC-specific conversion and cannot be handled by generic code, so add a new IRQ method to do the conversion.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v8: - Move header definitions into this patch
Changes in v3: - Fix 'the an' typo
Changes in v2: None
drivers/misc/irq-uclass.c | 18 ++++++++++-- drivers/misc/irq_sandbox.c | 16 +++++++++++ include/acpi/acpi_device.h | 59 ++++++++++++++++++++++++++++++++++++++ include/irq.h | 43 +++++++++++++++++++++++++++ test/dm/irq.c | 22 ++++++++++++++ 5 files changed, 156 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/irq-uclass.c b/drivers/misc/irq-uclass.c index 61aa10e465..b4a8b7b429 100644 --- a/drivers/misc/irq-uclass.c +++ b/drivers/misc/irq-uclass.c @@ -153,8 +153,6 @@ int irq_request(struct udevice *dev, struct irq *irq) const struct irq_ops *ops;
log_debug("(dev=%p, irq=%p)\n", dev, irq); - if (!irq) - return 0; ops = irq_get_ops(dev);
irq->dev = dev; @@ -176,6 +174,22 @@ int irq_first_device_type(enum irq_dev_t type, struct udevice **devp) return 0; }
+#if CONFIG_IS_ENABLED(ACPIGEN) +int irq_get_acpi(const struct irq *irq, struct acpi_irq *acpi_irq) +{ + struct irq_ops *ops; + + if (!irq_is_valid(irq)) + return -EINVAL; + + ops = irq_get_ops(irq->dev); + if (!ops->get_acpi) + return -ENOSYS; + + return ops->get_acpi(irq, acpi_irq); +} +#endif + UCLASS_DRIVER(irq) = { .id = UCLASS_IRQ, .name = "irq", diff --git a/drivers/misc/irq_sandbox.c b/drivers/misc/irq_sandbox.c index 54bc47c8d8..a2511b32fc 100644 --- a/drivers/misc/irq_sandbox.c +++ b/drivers/misc/irq_sandbox.c @@ -8,6 +8,7 @@ #include <common.h> #include <dm.h> #include <irq.h> +#include <acpi/acpi_device.h> #include <asm/test.h>
/** @@ -73,6 +74,18 @@ static int sandbox_irq_of_xlate(struct irq *irq, return 0; }
+static __maybe_unused int sandbox_get_acpi(const struct irq *irq, + struct acpi_irq *acpi_irq) +{ + acpi_irq->pin = irq->id; + acpi_irq->mode = ACPI_IRQ_LEVEL_TRIGGERED; + acpi_irq->polarity = ACPI_IRQ_ACTIVE_HIGH; + acpi_irq->shared = ACPI_IRQ_SHARED; + acpi_irq->wake = ACPI_IRQ_WAKE; + + return 0; +} + static const struct irq_ops sandbox_irq_ops = { .route_pmc_gpio_gpe = sandbox_route_pmc_gpio_gpe, .set_polarity = sandbox_set_polarity, @@ -80,6 +93,9 @@ static const struct irq_ops sandbox_irq_ops = { .restore_polarities = sandbox_restore_polarities, .read_and_clear = sandbox_irq_read_and_clear, .of_xlate = sandbox_irq_of_xlate, +#if CONFIG_IS_ENABLED(ACPIGEN) + .get_acpi = sandbox_get_acpi, +#endif };
static const struct udevice_id sandbox_irq_ids[] = { diff --git a/include/acpi/acpi_device.h b/include/acpi/acpi_device.h index 1b4e3d7b5f..0ef762ad6b 100644 --- a/include/acpi/acpi_device.h +++ b/include/acpi/acpi_device.h @@ -11,6 +11,12 @@
struct udevice;
+/* ACPI descriptor values for common descriptors: SERIAL_BUS means I2C */ +#define ACPI_DESCRIPTOR_LARGE BIT(7) +#define ACPI_DESCRIPTOR_INTERRUPT (ACPI_DESCRIPTOR_LARGE | 9) +#define ACPI_DESCRIPTOR_GPIO (ACPI_DESCRIPTOR_LARGE | 12) +#define ACPI_DESCRIPTOR_SERIAL_BUS (ACPI_DESCRIPTOR_LARGE | 14) + /* Length of a full path to an ACPI device */ #define ACPI_PATH_MAX 30
@@ -29,6 +35,59 @@ enum acpi_dev_status { ACPI_DSTATUS_SHOW_IN_UI, };
+/** enum acpi_irq_mode - edge/level trigger mode */ +enum acpi_irq_mode { + ACPI_IRQ_EDGE_TRIGGERED, + ACPI_IRQ_LEVEL_TRIGGERED, +}; + +/** + * enum acpi_irq_polarity - polarity of interrupt + * + * @ACPI_IRQ_ACTIVE_LOW - for ACPI_IRQ_EDGE_TRIGGERED this means falling edge + * @ACPI_IRQ_ACTIVE_HIGH - for ACPI_IRQ_EDGE_TRIGGERED this means rising edge + * @ACPI_IRQ_ACTIVE_BOTH - not meaningful for ACPI_IRQ_EDGE_TRIGGERED + */ +enum acpi_irq_polarity { + ACPI_IRQ_ACTIVE_LOW, + ACPI_IRQ_ACTIVE_HIGH, + ACPI_IRQ_ACTIVE_BOTH, +}; + +/** + * enum acpi_irq_shared - whether interrupt is shared or not + * + * @ACPI_IRQ_EXCLUSIVE: only this device uses the interrupt + * @ACPI_IRQ_SHARED: other devices may use this interrupt + */ +enum acpi_irq_shared { + ACPI_IRQ_EXCLUSIVE, + ACPI_IRQ_SHARED, +}; + +/** enum acpi_irq_wake - indicates whether this interrupt can wake the device */ +enum acpi_irq_wake { + ACPI_IRQ_NO_WAKE, + ACPI_IRQ_WAKE, +}; + +/** + * struct acpi_irq - representation of an ACPI interrupt + * + * @pin: ACPI pin that is monitored for the interrupt + * @mode: Edge/level triggering + * @polarity: Interrupt polarity + * @shared: Whether interrupt is shared or not + * @wake: Whether interrupt can wake the device from sleep + */ +struct acpi_irq { + unsigned int pin; + enum acpi_irq_mode mode; + enum acpi_irq_polarity polarity; + enum acpi_irq_shared shared; + enum acpi_irq_wake wake; +}; + /** * acpi_device_path() - Get the full path to an ACPI device * diff --git a/include/irq.h b/include/irq.h index b71afe9bee..8527e4dd79 100644 --- a/include/irq.h +++ b/include/irq.h @@ -8,6 +8,9 @@ #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() @@ -24,10 +27,12 @@ enum irq_dev_t { * * @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; };
/** @@ -119,10 +124,36 @@ struct irq_ops { * @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 * @@ -223,4 +254,16 @@ int irq_free(struct irq *irq); */ 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 diff --git a/test/dm/irq.c b/test/dm/irq.c index 192d80d7e1..50e505e657 100644 --- a/test/dm/irq.c +++ b/test/dm/irq.c @@ -8,6 +8,7 @@ #include <common.h> #include <dm.h> #include <irq.h> +#include <acpi/acpi_device.h> #include <asm/test.h> #include <dm/test.h> #include <test/ut.h> @@ -75,3 +76,24 @@ static int dm_test_request(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_request, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); + +/* Test of irq_get_acpi() */ +static int dm_test_irq_get_acpi(struct unit_test_state *uts) +{ + struct acpi_irq airq; + struct udevice *dev; + struct irq irq; + + ut_assertok(uclass_first_device_err(UCLASS_TEST_FDT, &dev)); + ut_assertok(irq_get_by_index(dev, 0, &irq)); + + ut_assertok(irq_get_acpi(&irq, &airq)); + ut_asserteq(3, airq.pin); + ut_asserteq(ACPI_IRQ_LEVEL_TRIGGERED, airq.mode); + ut_asserteq(ACPI_IRQ_ACTIVE_HIGH, airq.polarity); + ut_asserteq(ACPI_IRQ_SHARED, airq.shared); + ut_asserteq(ACPI_IRQ_WAKE, airq.wake); + + return 0; +} +DM_TEST(dm_test_irq_get_acpi, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);