diff options
Diffstat (limited to 'src/acpi/acpi_device.c')
| -rw-r--r-- | src/acpi/acpi_device.c | 961 |
1 files changed, 961 insertions, 0 deletions
diff --git a/src/acpi/acpi_device.c b/src/acpi/acpi_device.c new file mode 100644 index 0000000000..9f63200121 --- /dev/null +++ b/src/acpi/acpi_device.c @@ -0,0 +1,961 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* This file is part of the coreboot project. */ + +#include <assert.h> +#include <string.h> +#include <arch/acpi.h> +#include <arch/acpi_device.h> +#include <arch/acpigen.h> +#include <device/device.h> +#include <device/path.h> +#include <stdlib.h> +#include <crc_byte.h> + +#if CONFIG(GENERIC_GPIO_LIB) +#include <gpio.h> +#endif + +#define ACPI_DP_UUID "daffd814-6eba-4d8c-8a91-bc9bbf4aa301" +#define ACPI_DP_CHILD_UUID "dbb8e3e6-5886-4ba6-8795-1319f52a966b" + +/* Write empty word value and return pointer to it */ +static void *acpi_device_write_zero_len(void) +{ + char *p = acpigen_get_current(); + acpigen_emit_word(0); + return p; +} + +/* Fill in length value from start to current at specified location */ +static void acpi_device_fill_from_len(char *ptr, char *start) +{ + uint16_t len = acpigen_get_current() - start; + ptr[0] = len & 0xff; + ptr[1] = (len >> 8) & 0xff; +} + +/* + * Fill in the length field with the value calculated from after + * the 16bit field to acpigen current as this length value does + * not include the length field itself. + */ +static void acpi_device_fill_len(void *ptr) +{ + acpi_device_fill_from_len(ptr, ptr + sizeof(uint16_t)); +} + +/* Locate and return the ACPI name for this device */ +const char *acpi_device_name(const struct device *dev) +{ + const struct device *pdev = dev; + const char *name = NULL; + + if (!dev) + return NULL; + + /* Check for device specific handler */ + if (dev->ops->acpi_name) + return dev->ops->acpi_name(dev); + + /* Walk up the tree to find if any parent can identify this device */ + while (pdev->bus) { + pdev = pdev->bus->dev; + if (!pdev) + break; + if (pdev->path.type == DEVICE_PATH_ROOT) + break; + if (pdev->ops && pdev->ops->acpi_name) + name = pdev->ops->acpi_name(dev); + if (name) + return name; + } + + return NULL; +} + +/* Locate and return the ACPI _HID (Hardware ID) for this device */ +const char *acpi_device_hid(const struct device *dev) +{ + if (!dev) + return NULL; + + /* Check for device specific handler */ + if (dev->ops->acpi_hid) + return dev->ops->acpi_hid(dev); + + /* + * Don't walk up the tree to find any parent that can identify this device, as + * PNP devices are hard to identify. + */ + + return NULL; +} + +/* + * Generate unique ID based on the ACPI path. + * Collisions on the same _HID are possible but very unlikely. + */ +uint32_t acpi_device_uid(const struct device *dev) +{ + const char *path = acpi_device_path(dev); + if (!path) + return 0; + + return CRC(path, strlen(path), crc32_byte); +} + +/* Recursive function to find the root device and print a path from there */ +static ssize_t acpi_device_path_fill(const struct device *dev, char *buf, + size_t buf_len, size_t cur) +{ + const char *name = acpi_device_name(dev); + ssize_t next = 0; + + if (!name) + return -1; + + /* + * Make sure this name segment will fit, including the path segment + * separator and possible NUL terminator if this is the last segment. + */ + if (!dev || (cur + strlen(name) + 2) > buf_len) + return cur; + + /* Walk up the tree to the root device */ + if (dev->path.type != DEVICE_PATH_ROOT && dev->bus && dev->bus->dev) + next = acpi_device_path_fill(dev->bus->dev, buf, buf_len, cur); + if (next < 0) + return next; + + /* Fill in the path from the root device */ + next += snprintf(buf + next, buf_len - next, "%s%s", + (dev->path.type == DEVICE_PATH_ROOT + || (strlen(name) == 0)) ? + "" : ".", name); + + return next; +} + +/* + * Warning: just as with dev_path() this uses a static buffer + * so should not be called mulitple times in one statement + */ +const char *acpi_device_path(const struct device *dev) +{ + static char buf[DEVICE_PATH_MAX] = {}; + + if (!dev) + return NULL; + + if (acpi_device_path_fill(dev, buf, sizeof(buf), 0) <= 0) + return NULL; + + return buf; +} + +/* Return the path of the parent device as the ACPI Scope for this device */ +const char *acpi_device_scope(const struct device *dev) +{ + static char buf[DEVICE_PATH_MAX] = {}; + + if (!dev || !dev->bus || !dev->bus->dev) + return NULL; + + if (acpi_device_path_fill(dev->bus->dev, buf, sizeof(buf), 0) <= 0) + return NULL; + + return buf; +} + +/* Concatenate the device path and provided name suffix */ +const char *acpi_device_path_join(const struct device *dev, const char *name) +{ + static char buf[DEVICE_PATH_MAX] = {}; + ssize_t len; + + if (!dev) + return NULL; + + /* Build the path of this device */ + len = acpi_device_path_fill(dev, buf, sizeof(buf), 0); + if (len <= 0) + return NULL; + + /* Ensure there is room for the added name, separator, and NUL */ + if ((len + strlen(name) + 2) > sizeof(buf)) + return NULL; + snprintf(buf + len, sizeof(buf) - len, ".%s", name); + + return buf; +} + +int acpi_device_status(const struct device *dev) +{ + if (!dev->enabled) + return ACPI_STATUS_DEVICE_ALL_OFF; + if (dev->hidden) + return ACPI_STATUS_DEVICE_HIDDEN_ON; + return ACPI_STATUS_DEVICE_ALL_ON; +} + + +/* Write the unique _UID based on ACPI device path. */ +void acpi_device_write_uid(const struct device *dev) +{ + acpigen_write_name_integer("_UID", acpi_device_uid(dev)); +} + +/* ACPI 6.1 section 6.4.3.6: Extended Interrupt Descriptor */ +void acpi_device_write_interrupt(const struct acpi_irq *irq) +{ + void *desc_length; + uint8_t flags; + + if (!irq || !irq->pin) + return; + + /* This is supported by GpioInt() but not Interrupt() */ + if (irq->polarity == ACPI_IRQ_ACTIVE_BOTH) + return; + + /* Byte 0: Descriptor Type */ + acpigen_emit_byte(ACPI_DESCRIPTOR_INTERRUPT); + + /* Byte 1-2: Length (filled in later) */ + desc_length = acpi_device_write_zero_len(); + + /* + * Byte 3: Flags + * [7:5]: Reserved + * [4]: Wake (0=NO_WAKE 1=WAKE) + * [3]: Sharing (0=EXCLUSIVE 1=SHARED) + * [2]: Polarity (0=HIGH 1=LOW) + * [1]: Mode (0=LEVEL 1=EDGE) + * [0]: Resource (0=PRODUCER 1=CONSUMER) + */ + flags = 1 << 0; /* ResourceConsumer */ + if (irq->mode == ACPI_IRQ_EDGE_TRIGGERED) + flags |= 1 << 1; + if (irq->polarity == ACPI_IRQ_ACTIVE_LOW) + flags |= 1 << 2; + if (irq->shared == ACPI_IRQ_SHARED) + flags |= 1 << 3; + if (irq->wake == ACPI_IRQ_WAKE) + flags |= 1 << 4; + acpigen_emit_byte(flags); + + /* Byte 4: Interrupt Table Entry Count */ + acpigen_emit_byte(1); + + /* Byte 5-8: Interrupt Number */ + acpigen_emit_dword(irq->pin); + + /* Fill in Descriptor Length (account for len word) */ + acpi_device_fill_len(desc_length); +} + +/* ACPI 6.1 section 6.4.3.8.1 - GPIO Interrupt or I/O */ +void acpi_device_write_gpio(const struct acpi_gpio *gpio) +{ + void *start, *desc_length; + void *pin_table_offset, *vendor_data_offset, *resource_offset; + uint16_t flags = 0; + int pin; + + if (!gpio || gpio->type > ACPI_GPIO_TYPE_IO) + return; + + start = acpigen_get_current(); + + /* Byte 0: Descriptor Type */ + acpigen_emit_byte(ACPI_DESCRIPTOR_GPIO); + + /* Byte 1-2: Length (fill in later) */ + desc_length = acpi_device_write_zero_len(); + + /* Byte 3: Revision ID */ + acpigen_emit_byte(ACPI_GPIO_REVISION_ID); + + /* Byte 4: GpioIo or GpioInt */ + acpigen_emit_byte(gpio->type); + + /* + * Byte 5-6: General Flags + * [15:1]: 0 => Reserved + * [0]: 1 => ResourceConsumer + */ + acpigen_emit_word(1 << 0); + + switch (gpio->type) { + case ACPI_GPIO_TYPE_INTERRUPT: + /* + * Byte 7-8: GPIO Interrupt Flags + * [15:5]: 0 => Reserved + * [4]: Wake (0=NO_WAKE 1=WAKE) + * [3]: Sharing (0=EXCLUSIVE 1=SHARED) + * [2:1]: Polarity (0=HIGH 1=LOW 2=BOTH) + * [0]: Mode (0=LEVEL 1=EDGE) + */ + if (gpio->irq.mode == ACPI_IRQ_EDGE_TRIGGERED) + flags |= 1 << 0; + if (gpio->irq.shared == ACPI_IRQ_SHARED) + flags |= 1 << 3; + if (gpio->irq.wake == ACPI_IRQ_WAKE) + flags |= 1 << 4; + + switch (gpio->irq.polarity) { + case ACPI_IRQ_ACTIVE_HIGH: + flags |= 0 << 1; + break; + case ACPI_IRQ_ACTIVE_LOW: + flags |= 1 << 1; + break; + case ACPI_IRQ_ACTIVE_BOTH: + flags |= 2 << 1; + break; + } + break; + + case ACPI_GPIO_TYPE_IO: + /* + * Byte 7-8: GPIO IO Flags + * [15:4]: 0 => Reserved + * [3]: Sharing (0=EXCLUSIVE 1=SHARED) + * [2]: 0 => Reserved + * [1:0]: IO Restriction + * 0 => IoRestrictionNone + * 1 => IoRestrictionInputOnly + * 2 => IoRestrictionOutputOnly + * 3 => IoRestrictionNoneAndPreserve + */ + flags |= gpio->io_restrict & 3; + if (gpio->io_shared) + flags |= 1 << 3; + break; + } + acpigen_emit_word(flags); + + /* + * Byte 9: Pin Configuration + * 0x01 => Default (no configuration applied) + * 0x02 => Pull-up + * 0x03 => Pull-down + * 0x04-0x7F => Reserved + * 0x80-0xff => Vendor defined + */ + acpigen_emit_byte(gpio->pull); + + /* Byte 10-11: Output Drive Strength in 1/100 mA */ + acpigen_emit_word(gpio->output_drive_strength); + + /* Byte 12-13: Debounce Timeout in 1/100 ms */ + acpigen_emit_word(gpio->interrupt_debounce_timeout); + + /* Byte 14-15: Pin Table Offset, relative to start */ + pin_table_offset = acpi_device_write_zero_len(); + + /* Byte 16: Reserved */ + acpigen_emit_byte(0); + + /* Byte 17-18: Resource Source Name Offset, relative to start */ + resource_offset = acpi_device_write_zero_len(); + + /* Byte 19-20: Vendor Data Offset, relative to start */ + vendor_data_offset = acpi_device_write_zero_len(); + + /* Byte 21-22: Vendor Data Length */ + acpigen_emit_word(0); + + /* Fill in Pin Table Offset */ + acpi_device_fill_from_len(pin_table_offset, start); + + /* Pin Table, one word for each pin */ + for (pin = 0; pin < gpio->pin_count; pin++) { + uint16_t acpi_pin = gpio->pins[pin]; +#if CONFIG(GENERIC_GPIO_LIB) + acpi_pin = gpio_acpi_pin(acpi_pin); +#endif + acpigen_emit_word(acpi_pin); + } + + /* Fill in Resource Source Name Offset */ + acpi_device_fill_from_len(resource_offset, start); + + /* Resource Source Name String */ +#if CONFIG(GENERIC_GPIO_LIB) + acpigen_emit_string(gpio->resource ? : gpio_acpi_path(gpio->pins[0])); +#else + acpigen_emit_string(gpio->resource); +#endif + + /* Fill in Vendor Data Offset */ + acpi_device_fill_from_len(vendor_data_offset, start); + + /* Fill in GPIO Descriptor Length (account for len word) */ + acpi_device_fill_len(desc_length); +} + +/* ACPI 6.1 section 6.4.3.8.2.1 - I2cSerialBus() */ +void acpi_device_write_i2c(const struct acpi_i2c *i2c) +{ + void *desc_length, *type_length; + + /* Byte 0: Descriptor Type */ + acpigen_emit_byte(ACPI_DESCRIPTOR_SERIAL_BUS); + + /* Byte 1+2: Length (filled in later) */ + desc_length = acpi_device_write_zero_len(); + + /* Byte 3: Revision ID */ + acpigen_emit_byte(ACPI_I2C_SERIAL_BUS_REVISION_ID); + + /* Byte 4: Resource Source Index is Reserved */ + acpigen_emit_byte(0); + + /* Byte 5: Serial Bus Type is I2C */ + acpigen_emit_byte(ACPI_SERIAL_BUS_TYPE_I2C); + + /* + * Byte 6: Flags + * [7:2]: 0 => Reserved + * [1]: 1 => ResourceConsumer + * [0]: 0 => ControllerInitiated + */ + acpigen_emit_byte(1 << 1); + + /* + * Byte 7-8: Type Specific Flags + * [15:1]: 0 => Reserved + * [0]: 0 => 7bit, 1 => 10bit + */ + acpigen_emit_word(i2c->mode_10bit); + + /* Byte 9: Type Specific Revision ID */ + acpigen_emit_byte(ACPI_I2C_TYPE_SPECIFIC_REVISION_ID); + + /* Byte 10-11: I2C Type Data Length */ + type_length = acpi_device_write_zero_len(); + + /* Byte 12-15: I2C Bus Speed */ + acpigen_emit_dword(i2c->speed); + + /* Byte 16-17: I2C Slave Address */ + acpigen_emit_word(i2c->address); + + /* Fill in Type Data Length */ + acpi_device_fill_len(type_length); + + /* Byte 18+: ResourceSource */ + acpigen_emit_string(i2c->resource); + + /* Fill in I2C Descriptor Length */ + acpi_device_fill_len(desc_length); +} + +/* ACPI 6.1 section 6.4.3.8.2.2 - SpiSerialBus() */ +void acpi_device_write_spi(const struct acpi_spi *spi) +{ + void *desc_length, *type_length; + uint16_t flags = 0; + + /* Byte 0: Descriptor Type */ + acpigen_emit_byte(ACPI_DESCRIPTOR_SERIAL_BUS); + + /* Byte 1+2: Length (filled in later) */ + desc_length = acpi_device_write_zero_len(); + + /* Byte 3: Revision ID */ + acpigen_emit_byte(ACPI_SPI_SERIAL_BUS_REVISION_ID); + + /* Byte 4: Resource Source Index is Reserved */ + acpigen_emit_byte(0); + + /* Byte 5: Serial Bus Type is SPI */ + acpigen_emit_byte(ACPI_SERIAL_BUS_TYPE_SPI); + + /* + * Byte 6: Flags + * [7:2]: 0 => Reserved + * [1]: 1 => ResourceConsumer + * [0]: 0 => ControllerInitiated + */ + acpigen_emit_byte(1 << 1); + + /* + * Byte 7-8: Type Specific Flags + * [15:2]: 0 => Reserved + * [1]: 0 => ActiveLow, 1 => ActiveHigh + * [0]: 0 => FourWire, 1 => ThreeWire + */ + if (spi->wire_mode == SPI_3_WIRE_MODE) + flags |= 1 << 0; + if (spi->device_select_polarity == SPI_POLARITY_HIGH) + flags |= 1 << 1; + acpigen_emit_word(flags); + + /* Byte 9: Type Specific Revision ID */ + acpigen_emit_byte(ACPI_SPI_TYPE_SPECIFIC_REVISION_ID); + + /* Byte 10-11: SPI Type Data Length */ + type_length = acpi_device_write_zero_len(); + + /* Byte 12-15: Connection Speed */ + acpigen_emit_dword(spi->speed); + + /* Byte 16: Data Bit Length */ + acpigen_emit_byte(spi->data_bit_length); + + /* Byte 17: Clock Phase */ + acpigen_emit_byte(spi->clock_phase); + + /* Byte 18: Clock Polarity */ + acpigen_emit_byte(spi->clock_polarity); + + /* Byte 19-20: Device Selection */ + acpigen_emit_word(spi->device_select); + + /* Fill in Type Data Length */ + acpi_device_fill_len(type_length); + + /* Byte 21+: ResourceSource String */ + acpigen_emit_string(spi->resource); + + /* Fill in SPI Descriptor Length */ + acpi_device_fill_len(desc_length); +} + +/* PowerResource() with Enable and/or Reset control */ +void acpi_device_add_power_res(const struct acpi_power_res_params *params) +{ + static const char * const power_res_dev_states[] = { "_PR0", "_PR3" }; + unsigned int reset_gpio = params->reset_gpio ? params->reset_gpio->pins[0] : 0; + unsigned int enable_gpio = params->enable_gpio ? params->enable_gpio->pins[0] : 0; + unsigned int stop_gpio = params->stop_gpio ? params->stop_gpio->pins[0] : 0; + + if (!reset_gpio && !enable_gpio && !stop_gpio) + return; + + /* PowerResource (PRIC, 0, 0) */ + acpigen_write_power_res("PRIC", 0, 0, power_res_dev_states, + ARRAY_SIZE(power_res_dev_states)); + + /* Method (_STA, 0, NotSerialized) { Return (0x1) } */ + acpigen_write_STA(0x1); + + /* Method (_ON, 0, Serialized) */ + acpigen_write_method_serialized("_ON", 0); + if (reset_gpio) + acpigen_enable_tx_gpio(params->reset_gpio); + if (enable_gpio) { + acpigen_enable_tx_gpio(params->enable_gpio); + if (params->enable_delay_ms) + acpigen_write_sleep(params->enable_delay_ms); + } + if (reset_gpio) { + acpigen_disable_tx_gpio(params->reset_gpio); + if (params->reset_delay_ms) + acpigen_write_sleep(params->reset_delay_ms); + } + if (stop_gpio) { + acpigen_disable_tx_gpio(params->stop_gpio); + if (params->stop_delay_ms) + acpigen_write_sleep(params->stop_delay_ms); + } + acpigen_pop_len(); /* _ON method */ + + /* Method (_OFF, 0, Serialized) */ + acpigen_write_method_serialized("_OFF", 0); + if (stop_gpio) { + acpigen_enable_tx_gpio(params->stop_gpio); + if (params->stop_off_delay_ms) + acpigen_write_sleep(params->stop_off_delay_ms); + } + if (reset_gpio) { + acpigen_enable_tx_gpio(params->reset_gpio); + if (params->reset_off_delay_ms) + acpigen_write_sleep(params->reset_off_delay_ms); + } + if (enable_gpio) { + acpigen_disable_tx_gpio(params->enable_gpio); + if (params->enable_off_delay_ms) + acpigen_write_sleep(params->enable_off_delay_ms); + } + acpigen_pop_len(); /* _OFF method */ + + acpigen_pop_len(); /* PowerResource PRIC */ +} + +static void acpi_dp_write_array(const struct acpi_dp *array); +static void acpi_dp_write_value(const struct acpi_dp *prop) +{ + switch (prop->type) { + case ACPI_DP_TYPE_INTEGER: + acpigen_write_integer(prop->integer); + break; + case ACPI_DP_TYPE_STRING: + case ACPI_DP_TYPE_CHILD: + acpigen_write_string(prop->string); + break; + case ACPI_DP_TYPE_REFERENCE: + acpigen_emit_namestring(prop->string); + break; + case ACPI_DP_TYPE_ARRAY: + acpi_dp_write_array(prop->array); + break; + default: + break; + } +} + +/* Package (2) { "prop->name", VALUE } */ +static void acpi_dp_write_property(const struct acpi_dp *prop) +{ + acpigen_write_package(2); + acpigen_write_string(prop->name); + acpi_dp_write_value(prop); + acpigen_pop_len(); +} + +/* Write array of Device Properties */ +static void acpi_dp_write_array(const struct acpi_dp *array) +{ + const struct acpi_dp *dp; + char *pkg_count; + + /* Package element count determined as it is populated */ + pkg_count = acpigen_write_package(0); + + /* + * Only acpi_dp of type DP_TYPE_TABLE is allowed to be an array. + * DP_TYPE_TABLE does not have a value to be written. Thus, start + * the loop from next type in the array. + */ + for (dp = array->next; dp; dp = dp->next) { + acpi_dp_write_value(dp); + (*pkg_count)++; + } + + acpigen_pop_len(); +} + +static void acpi_dp_free(struct acpi_dp *dp) +{ + while (dp) { + struct acpi_dp *p = dp->next; + + switch (dp->type) { + case ACPI_DP_TYPE_CHILD: + acpi_dp_free(dp->child); + break; + case ACPI_DP_TYPE_ARRAY: + acpi_dp_free(dp->array); + break; + default: + break; + } + + free(dp); + dp = p; + } +} + +void acpi_dp_write(struct acpi_dp *table) +{ + struct acpi_dp *dp, *prop; + char *dp_count, *prop_count = NULL; + int child_count = 0; + + if (!table || table->type != ACPI_DP_TYPE_TABLE || !table->next) + return; + + /* Name (name) */ + acpigen_write_name(table->name); + + /* Device Property list starts with the next entry */ + prop = table->next; + + /* Package (DP), default to assuming no properties or children */ + dp_count = acpigen_write_package(0); + + /* Print base properties */ + for (dp = prop; dp; dp = dp->next) { + if (dp->type == ACPI_DP_TYPE_CHILD) { + child_count++; + } else { + /* + * The UUID and package is only added when + * we come across the first property. This + * is to avoid creating a zero-length package + * in situations where there are only children. + */ + if (!prop_count) { + *dp_count += 2; + /* ToUUID (ACPI_DP_UUID) */ + acpigen_write_uuid(ACPI_DP_UUID); + /* + * Package (PROP), element count determined as + * it is populated + */ + prop_count = acpigen_write_package(0); + } + (*prop_count)++; + acpi_dp_write_property(dp); + } + } + if (prop_count) { + /* Package (PROP) length, if a package was written */ + acpigen_pop_len(); + } + + if (child_count) { + /* Update DP package count to 2 or 4 */ + *dp_count += 2; + /* ToUUID (ACPI_DP_CHILD_UUID) */ + acpigen_write_uuid(ACPI_DP_CHILD_UUID); + + /* Print child pointer properties */ + acpigen_write_package(child_count); + + for (dp = prop; dp; dp = dp->next) + if (dp->type == ACPI_DP_TYPE_CHILD) + acpi_dp_write_property(dp); + /* Package (CHILD) length */ + acpigen_pop_len(); + } + + /* Package (DP) length */ + acpigen_pop_len(); + + /* Recursively parse children into separate tables */ + for (dp = prop; dp; dp = dp->next) + if (dp->type == ACPI_DP_TYPE_CHILD) + acpi_dp_write(dp->child); + + /* Clean up */ + acpi_dp_free(table); +} + +static struct acpi_dp *acpi_dp_new(struct acpi_dp *dp, enum acpi_dp_type type, + const char *name) +{ + struct acpi_dp *new; + + new = malloc(sizeof(struct acpi_dp)); + if (!new) + return NULL; + + memset(new, 0, sizeof(*new)); + new->type = type; + new->name = name; + + if (dp) { + /* Add to end of property list */ + while (dp->next) + dp = dp->next; + dp->next = new; + } + + return new; +} + +struct acpi_dp *acpi_dp_new_table(const char *name) +{ + return acpi_dp_new(NULL, ACPI_DP_TYPE_TABLE, name); +} + +size_t acpi_dp_add_property_list(struct acpi_dp *dp, + const struct acpi_dp *property_list, + size_t property_count) +{ + const struct acpi_dp *prop; + size_t i, properties_added = 0; + + if (!dp || !property_list) + return 0; + + for (i = 0; i < property_count; i++) { + prop = &property_list[i]; + + if (prop->type == ACPI_DP_TYPE_UNKNOWN || !prop->name) + continue; + + switch (prop->type) { + case ACPI_DP_TYPE_INTEGER: + acpi_dp_add_integer(dp, prop->name, prop->integer); + break; + case ACPI_DP_TYPE_STRING: + acpi_dp_add_string(dp, prop->name, prop->string); + break; + case ACPI_DP_TYPE_REFERENCE: + acpi_dp_add_reference(dp, prop->name, prop->string); + break; + case ACPI_DP_TYPE_ARRAY: + acpi_dp_add_array(dp, prop->array); + break; + case ACPI_DP_TYPE_CHILD: + acpi_dp_add_child(dp, prop->name, prop->child); + break; + default: + continue; + } + + ++properties_added; + } + + return properties_added; +} + +struct acpi_dp *acpi_dp_add_integer(struct acpi_dp *dp, const char *name, + uint64_t value) +{ + if (!dp) + return NULL; + + struct acpi_dp *new = acpi_dp_new(dp, ACPI_DP_TYPE_INTEGER, name); + + if (new) + new->integer = value; + + return new; +} + +struct acpi_dp *acpi_dp_add_string(struct acpi_dp *dp, const char *name, + const char *string) +{ + if (!dp) + return NULL; + + struct acpi_dp *new = acpi_dp_new(dp, ACPI_DP_TYPE_STRING, name); + + if (new) + new->string = string; + + return new; +} + +struct acpi_dp *acpi_dp_add_reference(struct acpi_dp *dp, const char *name, + const char *reference) +{ + if (!dp) + return NULL; + + struct acpi_dp *new = acpi_dp_new(dp, ACPI_DP_TYPE_REFERENCE, name); + + if (new) + new->string = reference; + + return new; +} + +struct acpi_dp *acpi_dp_add_child(struct acpi_dp *dp, const char *name, + struct acpi_dp *child) +{ + struct acpi_dp *new; + + if (!dp || !child || child->type != ACPI_DP_TYPE_TABLE) + return NULL; + + new = acpi_dp_new(dp, ACPI_DP_TYPE_CHILD, name); + if (new) { + new->child = child; + new->string = child->name; + } + + return new; +} + +struct acpi_dp *acpi_dp_add_array(struct acpi_dp *dp, struct acpi_dp *array) +{ + struct acpi_dp *new; + + if (!dp || !array || array->type != ACPI_DP_TYPE_TABLE) + return NULL; + + new = acpi_dp_new(dp, ACPI_DP_TYPE_ARRAY, array->name); + if (new) + new->array = array; + + return new; +} + +struct acpi_dp *acpi_dp_add_integer_array(struct acpi_dp *dp, const char *name, + const uint64_t *array, int len) +{ + struct acpi_dp *dp_array; + int i; + + if (!dp || len <= 0) + return NULL; + + dp_array = acpi_dp_new_table(name); + if (!dp_array) + return NULL; + + for (i = 0; i < len; i++) + if (!acpi_dp_add_integer(dp_array, NULL, array[i])) + break; + + acpi_dp_add_array(dp, dp_array); + + return dp_array; +} + +struct acpi_dp *acpi_dp_add_gpio(struct acpi_dp *dp, const char *name, + const char *ref, int index, int pin, + int active_low) +{ + if (!dp) + return NULL; + + struct acpi_dp *gpio = acpi_dp_new_table(name); + + if (!gpio) + return NULL; + + /* The device that has _CRS containing GpioIO()/GpioInt() */ + acpi_dp_add_reference(gpio, NULL, ref); + + /* Index of the GPIO resource in _CRS starting from zero */ + acpi_dp_add_integer(gpio, NULL, index); + + /* Pin in the GPIO resource, typically zero */ + acpi_dp_add_integer(gpio, NULL, pin); + + /* Set if pin is active low */ + acpi_dp_add_integer(gpio, NULL, active_low); + + acpi_dp_add_array(dp, gpio); + + return gpio; +} + +/* + * This function writes a PCI device with _ADR object: + * Example: + * Scope (\_SB.PCI0) + * { + * Device (IGFX) + * { + * Name (_ADR, 0x0000000000000000) + * Method (_STA, 0, NotSerialized) { Return (status) } + * } + * } + */ +void acpi_device_write_pci_dev(const struct device *dev) +{ + const char *scope = acpi_device_scope(dev); + const char *name = acpi_device_name(dev); + + assert(dev->path.type == DEVICE_PATH_PCI); + assert(name); + assert(scope); + + acpigen_write_scope(scope); + acpigen_write_device(name); + + acpigen_write_ADR_pci_device(dev); + acpigen_write_STA(acpi_device_status(dev)); + + acpigen_pop_len(); /* Device */ + acpigen_pop_len(); /* Scope */ +} |