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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Generation of tables for particular device types
- *
- * Copyright 2019 Google LLC
- * Mostly taken from coreboot file of the same name
- */
- #include <common.h>
- #include <dm.h>
- #include <irq.h>
- #include <log.h>
- #include <usb.h>
- #include <acpi/acpigen.h>
- #include <acpi/acpi_device.h>
- #include <acpi/acpigen.h>
- #include <asm-generic/gpio.h>
- #include <dm/acpi.h>
- /**
- * acpi_device_path_fill() - Find the root device and build a path from there
- *
- * This recursively reaches back to the root device and progressively adds path
- * elements until the device is reached.
- *
- * @dev: Device to return path of
- * @buf: Buffer to hold the path
- * @buf_len: Length of buffer
- * @cur: Current position in the buffer
- * @return new position in buffer after adding @dev, or -ve on error
- */
- static int acpi_device_path_fill(const struct udevice *dev, char *buf,
- size_t buf_len, int cur)
- {
- char name[ACPI_NAME_MAX];
- int next = 0;
- int ret;
- ret = acpi_get_name(dev, name);
- if (ret)
- return ret;
- /*
- * Make sure this name segment will fit, including the path segment
- * separator and possible NULL terminator, if this is the last segment.
- */
- if (cur + strlen(name) + 2 > buf_len)
- return -ENOSPC;
- /* Walk up the tree to the root device */
- if (dev_get_parent(dev)) {
- next = acpi_device_path_fill(dev_get_parent(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_get_parent(dev) && *name ? "." : "", name);
- return next;
- }
- int acpi_device_path(const struct udevice *dev, char *buf, int maxlen)
- {
- int ret;
- ret = acpi_device_path_fill(dev, buf, maxlen, 0);
- if (ret < 0)
- return ret;
- return 0;
- }
- int acpi_device_scope(const struct udevice *dev, char *scope, int maxlen)
- {
- int ret;
- if (!dev_get_parent(dev))
- return log_msg_ret("noparent", -EINVAL);
- ret = acpi_device_path_fill(dev_get_parent(dev), scope, maxlen, 0);
- if (ret < 0)
- return log_msg_ret("fill", ret);
- return 0;
- }
- enum acpi_dev_status acpi_device_status(const struct udevice *dev)
- {
- return ACPI_DSTATUS_ALL_ON;
- }
- /**
- * largeres_write_len_f() - Write a placeholder word value
- *
- * Write a forward length for a large resource (2 bytes)
- *
- * @return pointer to the zero word (for fixing up later)
- */
- static void *largeres_write_len_f(struct acpi_ctx *ctx)
- {
- u8 *p = acpigen_get_current(ctx);
- acpigen_emit_word(ctx, 0);
- return p;
- }
- /**
- * largeres_fill_from_len() - Fill in a length value
- *
- * This calculated the number of bytes since the provided @start and writes it
- * to @ptr, which was previous returned by largeres_write_len_f().
- *
- * @ptr: Word to update
- * @start: Start address to count from to calculated the length
- */
- static void largeres_fill_from_len(struct acpi_ctx *ctx, char *ptr, u8 *start)
- {
- u16 len = acpigen_get_current(ctx) - start;
- ptr[0] = len & 0xff;
- ptr[1] = (len >> 8) & 0xff;
- }
- /**
- * largeres_fill_len() - Fill in a length value, excluding the length itself
- *
- * Fill in the length field with the value calculated from after the 16bit
- * field to acpigen current. This is useful since the length value does not
- * include the length field itself.
- *
- * This calls acpi_device_largeres_fill_len() passing @ptr + 2 as @start
- *
- * @ptr: Word to update.
- */
- static void largeres_fill_len(struct acpi_ctx *ctx, void *ptr)
- {
- largeres_fill_from_len(ctx, ptr, ptr + sizeof(u16));
- }
- /* ACPI 6.3 section 6.4.3.6: Extended Interrupt Descriptor */
- static int acpi_device_write_interrupt(struct acpi_ctx *ctx,
- const struct acpi_irq *irq)
- {
- void *desc_length;
- u8 flags;
- if (!irq->pin)
- return -ENOENT;
- /* This is supported by GpioInt() but not Interrupt() */
- if (irq->polarity == ACPI_IRQ_ACTIVE_BOTH)
- return -EINVAL;
- /* Byte 0: Descriptor Type */
- acpigen_emit_byte(ctx, ACPI_DESCRIPTOR_INTERRUPT);
- /* Byte 1-2: Length (filled in later) */
- desc_length = largeres_write_len_f(ctx);
- /*
- * 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 = BIT(0); /* ResourceConsumer */
- if (irq->mode == ACPI_IRQ_EDGE_TRIGGERED)
- flags |= BIT(1);
- if (irq->polarity == ACPI_IRQ_ACTIVE_LOW)
- flags |= BIT(2);
- if (irq->shared == ACPI_IRQ_SHARED)
- flags |= BIT(3);
- if (irq->wake == ACPI_IRQ_WAKE)
- flags |= BIT(4);
- acpigen_emit_byte(ctx, flags);
- /* Byte 4: Interrupt Table Entry Count */
- acpigen_emit_byte(ctx, 1);
- /* Byte 5-8: Interrupt Number */
- acpigen_emit_dword(ctx, irq->pin);
- /* Fill in Descriptor Length (account for len word) */
- largeres_fill_len(ctx, desc_length);
- return 0;
- }
- int acpi_device_write_interrupt_irq(struct acpi_ctx *ctx,
- const struct irq *req_irq)
- {
- struct acpi_irq irq;
- int ret;
- ret = irq_get_acpi(req_irq, &irq);
- if (ret)
- return log_msg_ret("get", ret);
- ret = acpi_device_write_interrupt(ctx, &irq);
- if (ret)
- return log_msg_ret("write", ret);
- return irq.pin;
- }
- /* ACPI 6.3 section 6.4.3.8.1 - GPIO Interrupt or I/O */
- int acpi_device_write_gpio(struct acpi_ctx *ctx, const struct acpi_gpio *gpio)
- {
- void *start, *desc_length;
- void *pin_table_offset, *vendor_data_offset, *resource_offset;
- u16 flags = 0;
- int pin;
- if (gpio->type > ACPI_GPIO_TYPE_IO)
- return -EINVAL;
- start = acpigen_get_current(ctx);
- /* Byte 0: Descriptor Type */
- acpigen_emit_byte(ctx, ACPI_DESCRIPTOR_GPIO);
- /* Byte 1-2: Length (fill in later) */
- desc_length = largeres_write_len_f(ctx);
- /* Byte 3: Revision ID */
- acpigen_emit_byte(ctx, ACPI_GPIO_REVISION_ID);
- /* Byte 4: GpioIo or GpioInt */
- acpigen_emit_byte(ctx, gpio->type);
- /*
- * Byte 5-6: General Flags
- * [15:1]: 0 => Reserved
- * [0]: 1 => ResourceConsumer
- */
- acpigen_emit_word(ctx, 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(ctx, 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(ctx, gpio->pull);
- /* Byte 10-11: Output Drive Strength in 1/100 mA */
- acpigen_emit_word(ctx, gpio->output_drive_strength);
- /* Byte 12-13: Debounce Timeout in 1/100 ms */
- acpigen_emit_word(ctx, gpio->interrupt_debounce_timeout);
- /* Byte 14-15: Pin Table Offset, relative to start */
- pin_table_offset = largeres_write_len_f(ctx);
- /* Byte 16: Reserved */
- acpigen_emit_byte(ctx, 0);
- /* Byte 17-18: Resource Source Name Offset, relative to start */
- resource_offset = largeres_write_len_f(ctx);
- /* Byte 19-20: Vendor Data Offset, relative to start */
- vendor_data_offset = largeres_write_len_f(ctx);
- /* Byte 21-22: Vendor Data Length */
- acpigen_emit_word(ctx, 0);
- /* Fill in Pin Table Offset */
- largeres_fill_from_len(ctx, pin_table_offset, start);
- /* Pin Table, one word for each pin */
- for (pin = 0; pin < gpio->pin_count; pin++)
- acpigen_emit_word(ctx, gpio->pins[pin]);
- /* Fill in Resource Source Name Offset */
- largeres_fill_from_len(ctx, resource_offset, start);
- /* Resource Source Name String */
- acpigen_emit_string(ctx, gpio->resource);
- /* Fill in Vendor Data Offset */
- largeres_fill_from_len(ctx, vendor_data_offset, start);
- /* Fill in GPIO Descriptor Length (account for len word) */
- largeres_fill_len(ctx, desc_length);
- return gpio->pins[0];
- }
- int acpi_device_write_gpio_desc(struct acpi_ctx *ctx,
- const struct gpio_desc *desc)
- {
- struct acpi_gpio gpio;
- int ret;
- ret = gpio_get_acpi(desc, &gpio);
- if (ret)
- return log_msg_ret("desc", ret);
- ret = acpi_device_write_gpio(ctx, &gpio);
- if (ret < 0)
- return log_msg_ret("gpio", ret);
- return ret;
- }
- int acpi_device_write_interrupt_or_gpio(struct acpi_ctx *ctx,
- struct udevice *dev, const char *prop)
- {
- struct irq req_irq;
- int pin;
- int ret;
- ret = irq_get_by_index(dev, 0, &req_irq);
- if (!ret) {
- ret = acpi_device_write_interrupt_irq(ctx, &req_irq);
- if (ret < 0)
- return log_msg_ret("irq", ret);
- pin = ret;
- } else {
- struct gpio_desc req_gpio;
- ret = gpio_request_by_name(dev, prop, 0, &req_gpio,
- GPIOD_IS_IN);
- if (ret)
- return log_msg_ret("no gpio", ret);
- ret = acpi_device_write_gpio_desc(ctx, &req_gpio);
- if (ret < 0)
- return log_msg_ret("gpio", ret);
- pin = ret;
- }
- return pin;
- }
- /* PowerResource() with Enable and/or Reset control */
- int acpi_device_add_power_res(struct acpi_ctx *ctx, u32 tx_state_val,
- const char *dw0_read, const char *dw0_write,
- const struct gpio_desc *reset_gpio,
- uint reset_delay_ms, uint reset_off_delay_ms,
- const struct gpio_desc *enable_gpio,
- uint enable_delay_ms, uint enable_off_delay_ms,
- const struct gpio_desc *stop_gpio,
- uint stop_delay_ms, uint stop_off_delay_ms)
- {
- static const char *const power_res_dev_states[] = { "_PR0", "_PR3" };
- struct acpi_gpio reset, enable, stop;
- bool has_reset, has_enable, has_stop;
- int ret;
- gpio_get_acpi(reset_gpio, &reset);
- gpio_get_acpi(enable_gpio, &enable);
- gpio_get_acpi(stop_gpio, &stop);
- has_reset = reset.pins[0];
- has_enable = enable.pins[0];
- has_stop = stop.pins[0];
- if (!has_reset && !has_enable && !has_stop)
- return -EINVAL;
- /* PowerResource (PRIC, 0, 0) */
- acpigen_write_power_res(ctx, "PRIC", 0, 0, power_res_dev_states,
- ARRAY_SIZE(power_res_dev_states));
- /* Method (_STA, 0, NotSerialized) { Return (0x1) } */
- acpigen_write_sta(ctx, 0x1);
- /* Method (_ON, 0, Serialized) */
- acpigen_write_method_serialized(ctx, "_ON", 0);
- if (reset_gpio) {
- ret = acpigen_set_enable_tx_gpio(ctx, tx_state_val, dw0_read,
- dw0_write, &reset, true);
- if (ret)
- return log_msg_ret("reset1", ret);
- }
- if (has_enable) {
- ret = acpigen_set_enable_tx_gpio(ctx, tx_state_val, dw0_read,
- dw0_write, &enable, true);
- if (ret)
- return log_msg_ret("enable1", ret);
- if (enable_delay_ms)
- acpigen_write_sleep(ctx, enable_delay_ms);
- }
- if (has_reset) {
- ret = acpigen_set_enable_tx_gpio(ctx, tx_state_val, dw0_read,
- dw0_write, &reset, false);
- if (ret)
- return log_msg_ret("reset2", ret);
- if (reset_delay_ms)
- acpigen_write_sleep(ctx, reset_delay_ms);
- }
- if (has_stop) {
- ret = acpigen_set_enable_tx_gpio(ctx, tx_state_val, dw0_read,
- dw0_write, &stop, false);
- if (ret)
- return log_msg_ret("stop1", ret);
- if (stop_delay_ms)
- acpigen_write_sleep(ctx, stop_delay_ms);
- }
- acpigen_pop_len(ctx); /* _ON method */
- /* Method (_OFF, 0, Serialized) */
- acpigen_write_method_serialized(ctx, "_OFF", 0);
- if (has_stop) {
- ret = acpigen_set_enable_tx_gpio(ctx, tx_state_val, dw0_read,
- dw0_write, &stop, true);
- if (ret)
- return log_msg_ret("stop2", ret);
- if (stop_off_delay_ms)
- acpigen_write_sleep(ctx, stop_off_delay_ms);
- }
- if (has_reset) {
- ret = acpigen_set_enable_tx_gpio(ctx, tx_state_val, dw0_read,
- dw0_write, &reset, true);
- if (ret)
- return log_msg_ret("reset3", ret);
- if (reset_off_delay_ms)
- acpigen_write_sleep(ctx, reset_off_delay_ms);
- }
- if (has_enable) {
- ret = acpigen_set_enable_tx_gpio(ctx, tx_state_val, dw0_read,
- dw0_write, &enable, false);
- if (ret)
- return log_msg_ret("enable2", ret);
- if (enable_off_delay_ms)
- acpigen_write_sleep(ctx, enable_off_delay_ms);
- }
- acpigen_pop_len(ctx); /* _OFF method */
- acpigen_pop_len(ctx); /* PowerResource PRIC */
- return 0;
- }
- int acpi_device_write_dsm_i2c_hid(struct acpi_ctx *ctx,
- int hid_desc_reg_offset)
- {
- int ret;
- acpigen_write_dsm_start(ctx);
- ret = acpigen_write_dsm_uuid_start(ctx, ACPI_DSM_I2C_HID_UUID);
- if (ret)
- return log_ret(ret);
- acpigen_write_dsm_uuid_start_cond(ctx, 0);
- /* ToInteger (Arg1, Local2) */
- acpigen_write_to_integer(ctx, ARG1_OP, LOCAL2_OP);
- /* If (LEqual (Local2, 0x0)) */
- acpigen_write_if_lequal_op_int(ctx, LOCAL2_OP, 0x0);
- /* Return (Buffer (One) { 0x1f }) */
- acpigen_write_return_singleton_buffer(ctx, 0x1f);
- acpigen_pop_len(ctx); /* Pop : If */
- /* Else */
- acpigen_write_else(ctx);
- /* If (LEqual (Local2, 0x1)) */
- acpigen_write_if_lequal_op_int(ctx, LOCAL2_OP, 0x1);
- /* Return (Buffer (One) { 0x3f }) */
- acpigen_write_return_singleton_buffer(ctx, 0x3f);
- acpigen_pop_len(ctx); /* Pop : If */
- /* Else */
- acpigen_write_else(ctx);
- /* Return (Buffer (One) { 0x0 }) */
- acpigen_write_return_singleton_buffer(ctx, 0x0);
- acpigen_pop_len(ctx); /* Pop : Else */
- acpigen_pop_len(ctx); /* Pop : Else */
- acpigen_write_dsm_uuid_end_cond(ctx);
- acpigen_write_dsm_uuid_start_cond(ctx, 1);
- acpigen_write_return_byte(ctx, hid_desc_reg_offset);
- acpigen_write_dsm_uuid_end_cond(ctx);
- acpigen_write_dsm_uuid_end(ctx);
- acpigen_write_dsm_end(ctx);
- return 0;
- }
- /* ACPI 6.3 section 6.4.3.8.2.1 - I2cSerialBusV2() */
- static void acpi_device_write_i2c(struct acpi_ctx *ctx,
- const struct acpi_i2c *i2c)
- {
- void *desc_length, *type_length;
- /* Byte 0: Descriptor Type */
- acpigen_emit_byte(ctx, ACPI_DESCRIPTOR_SERIAL_BUS);
- /* Byte 1+2: Length (filled in later) */
- desc_length = largeres_write_len_f(ctx);
- /* Byte 3: Revision ID */
- acpigen_emit_byte(ctx, ACPI_I2C_SERIAL_BUS_REVISION_ID);
- /* Byte 4: Resource Source Index is Reserved */
- acpigen_emit_byte(ctx, 0);
- /* Byte 5: Serial Bus Type is I2C */
- acpigen_emit_byte(ctx, ACPI_SERIAL_BUS_TYPE_I2C);
- /*
- * Byte 6: Flags
- * [7:2]: 0 => Reserved
- * [1]: 1 => ResourceConsumer
- * [0]: 0 => ControllerInitiated
- */
- acpigen_emit_byte(ctx, 1 << 1);
- /*
- * Byte 7-8: Type Specific Flags
- * [15:1]: 0 => Reserved
- * [0]: 0 => 7bit, 1 => 10bit
- */
- acpigen_emit_word(ctx, i2c->mode_10bit);
- /* Byte 9: Type Specific Revision ID */
- acpigen_emit_byte(ctx, ACPI_I2C_TYPE_SPECIFIC_REVISION_ID);
- /* Byte 10-11: I2C Type Data Length */
- type_length = largeres_write_len_f(ctx);
- /* Byte 12-15: I2C Bus Speed */
- acpigen_emit_dword(ctx, i2c->speed);
- /* Byte 16-17: I2C Slave Address */
- acpigen_emit_word(ctx, i2c->address);
- /* Fill in Type Data Length */
- largeres_fill_len(ctx, type_length);
- /* Byte 18+: ResourceSource */
- acpigen_emit_string(ctx, i2c->resource);
- /* Fill in I2C Descriptor Length */
- largeres_fill_len(ctx, desc_length);
- }
- /**
- * acpi_device_set_i2c() - Set up an ACPI I2C struct from a device
- *
- * The value of @scope is not copied, but only referenced. This implies the
- * caller has to ensure it stays valid for the lifetime of @i2c.
- *
- * @dev: I2C device to convert
- * @i2c: Place to put the new structure
- * @scope: Scope of the I2C device (this is the controller path)
- * @return chip address of device
- */
- static int acpi_device_set_i2c(const struct udevice *dev, struct acpi_i2c *i2c,
- const char *scope)
- {
- struct dm_i2c_chip *chip = dev_get_parent_platdata(dev);
- struct udevice *bus = dev_get_parent(dev);
- memset(i2c, '\0', sizeof(*i2c));
- i2c->address = chip->chip_addr;
- i2c->mode_10bit = 0;
- /*
- * i2c_bus->speed_hz is set if this device is probed, but if not we
- * must use the device tree
- */
- i2c->speed = dev_read_u32_default(bus, "clock-frequency",
- I2C_SPEED_STANDARD_RATE);
- i2c->resource = scope;
- return i2c->address;
- }
- int acpi_device_write_i2c_dev(struct acpi_ctx *ctx, const struct udevice *dev)
- {
- char scope[ACPI_PATH_MAX];
- struct acpi_i2c i2c;
- int ret;
- ret = acpi_device_scope(dev, scope, sizeof(scope));
- if (ret)
- return log_msg_ret("scope", ret);
- ret = acpi_device_set_i2c(dev, &i2c, scope);
- if (ret < 0)
- return log_msg_ret("set", ret);
- acpi_device_write_i2c(ctx, &i2c);
- return ret;
- }
- #ifdef CONFIG_SPI
- /* ACPI 6.1 section 6.4.3.8.2.2 - SpiSerialBus() */
- static void acpi_device_write_spi(struct acpi_ctx *ctx, const struct acpi_spi *spi)
- {
- void *desc_length, *type_length;
- u16 flags = 0;
- /* Byte 0: Descriptor Type */
- acpigen_emit_byte(ctx, ACPI_DESCRIPTOR_SERIAL_BUS);
- /* Byte 1+2: Length (filled in later) */
- desc_length = largeres_write_len_f(ctx);
- /* Byte 3: Revision ID */
- acpigen_emit_byte(ctx, ACPI_SPI_SERIAL_BUS_REVISION_ID);
- /* Byte 4: Resource Source Index is Reserved */
- acpigen_emit_byte(ctx, 0);
- /* Byte 5: Serial Bus Type is SPI */
- acpigen_emit_byte(ctx, ACPI_SERIAL_BUS_TYPE_SPI);
- /*
- * Byte 6: Flags
- * [7:2]: 0 => Reserved
- * [1]: 1 => ResourceConsumer
- * [0]: 0 => ControllerInitiated
- */
- acpigen_emit_byte(ctx, BIT(1));
- /*
- * Byte 7-8: Type Specific Flags
- * [15:2]: 0 => Reserveda
- * [1]: 0 => ActiveLow, 1 => ActiveHigh
- * [0]: 0 => FourWire, 1 => ThreeWire
- */
- if (spi->wire_mode == SPI_3_WIRE_MODE)
- flags |= BIT(0);
- if (spi->device_select_polarity == SPI_POLARITY_HIGH)
- flags |= BIT(1);
- acpigen_emit_word(ctx, flags);
- /* Byte 9: Type Specific Revision ID */
- acpigen_emit_byte(ctx, ACPI_SPI_TYPE_SPECIFIC_REVISION_ID);
- /* Byte 10-11: SPI Type Data Length */
- type_length = largeres_write_len_f(ctx);
- /* Byte 12-15: Connection Speed */
- acpigen_emit_dword(ctx, spi->speed);
- /* Byte 16: Data Bit Length */
- acpigen_emit_byte(ctx, spi->data_bit_length);
- /* Byte 17: Clock Phase */
- acpigen_emit_byte(ctx, spi->clock_phase);
- /* Byte 18: Clock Polarity */
- acpigen_emit_byte(ctx, spi->clock_polarity);
- /* Byte 19-20: Device Selection */
- acpigen_emit_word(ctx, spi->device_select);
- /* Fill in Type Data Length */
- largeres_fill_len(ctx, type_length);
- /* Byte 21+: ResourceSource String */
- acpigen_emit_string(ctx, spi->resource);
- /* Fill in SPI Descriptor Length */
- largeres_fill_len(ctx, desc_length);
- }
- /**
- * acpi_device_set_spi() - Set up an ACPI SPI struct from a device
- *
- * The value of @scope is not copied, but only referenced. This implies the
- * caller has to ensure it stays valid for the lifetime of @spi.
- *
- * @dev: SPI device to convert
- * @spi: Place to put the new structure
- * @scope: Scope of the SPI device (this is the controller path)
- * @return 0 (always)
- */
- static int acpi_device_set_spi(const struct udevice *dev, struct acpi_spi *spi,
- const char *scope)
- {
- struct dm_spi_slave_platdata *plat;
- struct spi_slave *slave = dev_get_parent_priv(dev);
- plat = dev_get_parent_platdata(slave->dev);
- memset(spi, '\0', sizeof(*spi));
- spi->device_select = plat->cs;
- spi->device_select_polarity = SPI_POLARITY_LOW;
- spi->wire_mode = SPI_4_WIRE_MODE;
- spi->speed = plat->max_hz;
- spi->data_bit_length = slave->wordlen;
- spi->clock_phase = plat->mode & SPI_CPHA ?
- SPI_CLOCK_PHASE_SECOND : SPI_CLOCK_PHASE_FIRST;
- spi->clock_polarity = plat->mode & SPI_CPOL ?
- SPI_POLARITY_HIGH : SPI_POLARITY_LOW;
- spi->resource = scope;
- return 0;
- }
- int acpi_device_write_spi_dev(struct acpi_ctx *ctx, const struct udevice *dev)
- {
- char scope[ACPI_PATH_MAX];
- struct acpi_spi spi;
- int ret;
- ret = acpi_device_scope(dev, scope, sizeof(scope));
- if (ret)
- return log_msg_ret("scope", ret);
- ret = acpi_device_set_spi(dev, &spi, scope);
- if (ret)
- return log_msg_ret("set", ret);
- acpi_device_write_spi(ctx, &spi);
- return 0;
- }
- #endif /* CONFIG_SPI */
- static const char *acpi_name_from_id(enum uclass_id id)
- {
- switch (id) {
- case UCLASS_USB_HUB:
- /* Root Hub */
- return "RHUB";
- /* DSDT: acpi/northbridge.asl */
- case UCLASS_NORTHBRIDGE:
- return "MCHC";
- /* DSDT: acpi/lpc.asl */
- case UCLASS_LPC:
- return "LPCB";
- /* DSDT: acpi/xhci.asl */
- case UCLASS_USB:
- /* This only supports USB3.0 controllers at present */
- return "XHCI";
- case UCLASS_PWM:
- return "PWM";
- default:
- return NULL;
- }
- }
- static int acpi_check_seq(const struct udevice *dev)
- {
- if (dev->req_seq == -1) {
- log_warning("Device '%s' has no seq\n", dev->name);
- return log_msg_ret("no seq", -ENXIO);
- }
- return dev->req_seq;
- }
- /* If you change this function, add test cases to dm_test_acpi_get_name() */
- int acpi_device_infer_name(const struct udevice *dev, char *out_name)
- {
- enum uclass_id parent_id = UCLASS_INVALID;
- enum uclass_id id;
- const char *name = NULL;
- id = device_get_uclass_id(dev);
- if (dev_get_parent(dev))
- parent_id = device_get_uclass_id(dev_get_parent(dev));
- if (id == UCLASS_SOUND)
- name = "HDAS";
- else if (id == UCLASS_PCI)
- name = "PCI0";
- else if (device_is_on_pci_bus(dev))
- name = acpi_name_from_id(id);
- if (!name) {
- switch (parent_id) {
- case UCLASS_USB: {
- struct usb_device *udev = dev_get_parent_priv(dev);
- sprintf(out_name, udev->speed >= USB_SPEED_SUPER ?
- "HS%02d" : "FS%02d", udev->portnr);
- name = out_name;
- break;
- }
- default:
- break;
- }
- }
- if (!name) {
- int num;
- switch (id) {
- /* DSDT: acpi/lpss.asl */
- case UCLASS_SERIAL:
- num = acpi_check_seq(dev);
- if (num < 0)
- return num;
- sprintf(out_name, "URT%d", num);
- name = out_name;
- break;
- case UCLASS_I2C:
- num = acpi_check_seq(dev);
- if (num < 0)
- return num;
- sprintf(out_name, "I2C%d", num);
- name = out_name;
- break;
- case UCLASS_SPI:
- num = acpi_check_seq(dev);
- if (num < 0)
- return num;
- sprintf(out_name, "SPI%d", num);
- name = out_name;
- break;
- default:
- break;
- }
- }
- if (!name) {
- log_warning("No name for device '%s'\n", dev->name);
- return -ENOENT;
- }
- if (name != out_name)
- acpi_copy_name(out_name, name);
- return 0;
- }
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