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-rw-r--r--lib/acpi/Makefile3
-rw-r--r--lib/acpi/acpi_device.c823
-rw-r--r--lib/acpi/acpi_dp.c402
-rw-r--r--lib/acpi/acpi_table.c1
-rw-r--r--lib/acpi/acpigen.c616
5 files changed, 1845 insertions, 0 deletions
diff --git a/lib/acpi/Makefile b/lib/acpi/Makefile
index 660491ef711..5c2f793701f 100644
--- a/lib/acpi/Makefile
+++ b/lib/acpi/Makefile
@@ -1,4 +1,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-y += acpigen.o
+obj-y += acpi_device.o
+obj-y += acpi_dp.o
obj-y += acpi_table.o
diff --git a/lib/acpi/acpi_device.c b/lib/acpi/acpi_device.c
new file mode 100644
index 00000000000..3c75b6d9629
--- /dev/null
+++ b/lib/acpi/acpi_device.c
@@ -0,0 +1,823 @@
+// 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;
+}
+
+/* ACPI 6.3 section 6.4.3.8.2.1 - I2cSerialBus() */
+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;
+}
diff --git a/lib/acpi/acpi_dp.c b/lib/acpi/acpi_dp.c
new file mode 100644
index 00000000000..579cab47715
--- /dev/null
+++ b/lib/acpi/acpi_dp.c
@@ -0,0 +1,402 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generation of tables for particular device types
+ *
+ * Copyright 2019 Google LLC
+ * Mostly taken from coreboot file acpi_device.c
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <malloc.h>
+#include <uuid.h>
+#include <acpi/acpigen.h>
+#include <acpi/acpi_dp.h>
+#include <dm/acpi.h>
+
+static void acpi_dp_write_array(struct acpi_ctx *ctx,
+ const struct acpi_dp *array);
+
+static void acpi_dp_write_value(struct acpi_ctx *ctx,
+ const struct acpi_dp *prop)
+{
+ switch (prop->type) {
+ case ACPI_DP_TYPE_INTEGER:
+ acpigen_write_integer(ctx, prop->integer);
+ break;
+ case ACPI_DP_TYPE_STRING:
+ case ACPI_DP_TYPE_CHILD:
+ acpigen_write_string(ctx, prop->string);
+ break;
+ case ACPI_DP_TYPE_REFERENCE:
+ acpigen_emit_namestring(ctx, prop->string);
+ break;
+ case ACPI_DP_TYPE_ARRAY:
+ acpi_dp_write_array(ctx, prop->array);
+ break;
+ default:
+ break;
+ }
+}
+
+/* Package (2) { "prop->name", VALUE } */
+static void acpi_dp_write_property(struct acpi_ctx *ctx,
+ const struct acpi_dp *prop)
+{
+ acpigen_write_package(ctx, 2);
+ acpigen_write_string(ctx, prop->name);
+ acpi_dp_write_value(ctx, prop);
+ acpigen_pop_len(ctx);
+}
+
+/* Write array of Device Properties */
+static void acpi_dp_write_array(struct acpi_ctx *ctx,
+ 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(ctx, 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(ctx, dp);
+ (*pkg_count)++;
+ }
+
+ acpigen_pop_len(ctx);
+}
+
+static void acpi_dp_free(struct acpi_dp *dp)
+{
+ assert(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;
+ }
+}
+
+static int acpi_dp_write_internal(struct acpi_ctx *ctx, struct acpi_dp *table)
+{
+ struct acpi_dp *dp, *prop;
+ char *dp_count, *prop_count = NULL;
+ int child_count = 0;
+ int ret;
+
+ assert(table);
+ if (table->type != ACPI_DP_TYPE_TABLE)
+ return 0;
+
+ /* Name (name) */
+ acpigen_write_name(ctx, 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(ctx, 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) */
+ ret = acpigen_write_uuid(ctx, ACPI_DP_UUID);
+ if (ret)
+ return log_msg_ret("touuid", ret);
+ /*
+ * Package (PROP), element count determined as
+ * it is populated
+ */
+ prop_count = acpigen_write_package(ctx, 0);
+ }
+ (*prop_count)++;
+ acpi_dp_write_property(ctx, dp);
+ }
+ }
+
+ if (prop_count) {
+ /* Package (PROP) length, if a package was written */
+ acpigen_pop_len(ctx);
+ }
+
+ if (child_count) {
+ /* Update DP package count to 2 or 4 */
+ *dp_count += 2;
+ /* ToUUID (ACPI_DP_CHILD_UUID) */
+ ret = acpigen_write_uuid(ctx, ACPI_DP_CHILD_UUID);
+ if (ret)
+ return log_msg_ret("child uuid", ret);
+
+ /* Print child pointer properties */
+ acpigen_write_package(ctx, child_count);
+
+ for (dp = prop; dp; dp = dp->next)
+ if (dp->type == ACPI_DP_TYPE_CHILD)
+ acpi_dp_write_property(ctx, dp);
+ /* Package (CHILD) length */
+ acpigen_pop_len(ctx);
+ }
+
+ /* Package (DP) length */
+ acpigen_pop_len(ctx);
+
+ /* Recursively parse children into separate tables */
+ for (dp = prop; dp; dp = dp->next) {
+ if (dp->type == ACPI_DP_TYPE_CHILD) {
+ ret = acpi_dp_write_internal(ctx, dp->child);
+ if (ret)
+ return log_msg_ret("dp child", ret);
+ }
+ }
+
+ return 0;
+}
+
+int acpi_dp_write(struct acpi_ctx *ctx, struct acpi_dp *table)
+{
+ int ret;
+
+ ret = acpi_dp_write_internal(ctx, table);
+
+ /* Clean up */
+ acpi_dp_free(table);
+
+ if (ret)
+ return log_msg_ret("write", ret);
+
+ return 0;
+}
+
+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);
+}
+
+struct acpi_dp *acpi_dp_add_integer(struct acpi_dp *dp, const char *name,
+ u64 value)
+{
+ struct acpi_dp *new;
+
+ assert(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)
+{
+ struct acpi_dp *new;
+
+ assert(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)
+{
+ struct acpi_dp *new;
+
+ assert(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;
+
+ assert(dp);
+ if (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;
+
+ assert(dp);
+ assert(array);
+ if (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,
+ u64 *array, int len)
+{
+ struct acpi_dp *dp_array;
+ int i;
+
+ assert(dp);
+ if (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;
+
+ if (!acpi_dp_add_array(dp, dp_array))
+ return NULL;
+
+ return dp_array;
+}
+
+struct acpi_dp *acpi_dp_add_gpio(struct acpi_dp *dp, const char *name,
+ const char *ref, int index, int pin,
+ enum acpi_irq_polarity polarity)
+{
+ struct acpi_dp *gpio;
+
+ assert(dp);
+ gpio = acpi_dp_new_table(name);
+ if (!gpio)
+ return NULL;
+
+ if (!acpi_dp_add_reference(gpio, NULL, ref) ||
+ !acpi_dp_add_integer(gpio, NULL, index) ||
+ !acpi_dp_add_integer(gpio, NULL, pin) ||
+ !acpi_dp_add_integer(gpio, NULL, polarity == ACPI_IRQ_ACTIVE_LOW))
+ return NULL;
+
+ if (!acpi_dp_add_array(dp, gpio))
+ return NULL;
+
+ return gpio;
+}
+
+int acpi_dp_ofnode_copy_int(ofnode node, struct acpi_dp *dp, const char *prop)
+{
+ int ret;
+ u32 val = 0;
+
+ ret = ofnode_read_u32(node, prop, &val);
+ if (ret)
+ return ret;
+ if (!acpi_dp_add_integer(dp, prop, val))
+ return log_ret(-ENOMEM);
+
+ return 0;
+}
+
+int acpi_dp_ofnode_copy_str(ofnode node, struct acpi_dp *dp, const char *prop)
+{
+ const char *val;
+
+ val = ofnode_read_string(node, prop);
+ if (!val)
+ return -EINVAL;
+ if (!acpi_dp_add_string(dp, prop, val))
+ return log_ret(-ENOMEM);
+
+ return 0;
+}
+
+int acpi_dp_dev_copy_int(const struct udevice *dev, struct acpi_dp *dp,
+ const char *prop)
+{
+ int ret;
+ u32 val = 0;
+
+ ret = dev_read_u32(dev, prop, &val);
+ if (ret)
+ return ret;
+ if (!acpi_dp_add_integer(dp, prop, val))
+ return log_ret(-ENOMEM);
+
+ return ret;
+}
+
+int acpi_dp_dev_copy_str(const struct udevice *dev, struct acpi_dp *dp,
+ const char *prop)
+{
+ const char *val;
+
+ val = dev_read_string(dev, prop);
+ if (!val)
+ return -EINVAL;
+ if (!acpi_dp_add_string(dp, prop, val))
+ return log_ret(-ENOMEM);
+
+ return 0;
+}
diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c
index 431776666e2..acc55e7fad6 100644
--- a/lib/acpi/acpi_table.c
+++ b/lib/acpi/acpi_table.c
@@ -237,6 +237,7 @@ static void acpi_write_xsdt(struct acpi_xsdt *xsdt)
void acpi_setup_base_tables(struct acpi_ctx *ctx, void *start)
{
+ ctx->base = start;
ctx->current = start;
/* Align ACPI tables to 16 byte */
diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c
new file mode 100644
index 00000000000..c609ef4daa4
--- /dev/null
+++ b/lib/acpi/acpigen.c
@@ -0,0 +1,616 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generation of ACPI (Advanced Configuration and Power Interface) tables
+ *
+ * Copyright 2019 Google LLC
+ * Mostly taken from coreboot
+ */
+
+#define LOG_CATEGORY LOGC_ACPI
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <uuid.h>
+#include <acpi/acpigen.h>
+#include <acpi/acpi_device.h>
+#include <acpi/acpi_table.h>
+#include <dm/acpi.h>
+
+u8 *acpigen_get_current(struct acpi_ctx *ctx)
+{
+ return ctx->current;
+}
+
+void acpigen_emit_byte(struct acpi_ctx *ctx, uint data)
+{
+ *(u8 *)ctx->current++ = data;
+}
+
+void acpigen_emit_word(struct acpi_ctx *ctx, uint data)
+{
+ acpigen_emit_byte(ctx, data & 0xff);
+ acpigen_emit_byte(ctx, (data >> 8) & 0xff);
+}
+
+void acpigen_emit_dword(struct acpi_ctx *ctx, uint data)
+{
+ /* Output the value in little-endian format */
+ acpigen_emit_byte(ctx, data & 0xff);
+ acpigen_emit_byte(ctx, (data >> 8) & 0xff);
+ acpigen_emit_byte(ctx, (data >> 16) & 0xff);
+ acpigen_emit_byte(ctx, (data >> 24) & 0xff);
+}
+
+/*
+ * Maximum length for an ACPI object generated by this code,
+ *
+ * If you need to change this, change acpigen_write_len_f(ctx) and
+ * acpigen_pop_len(ctx)
+ */
+#define ACPIGEN_MAXLEN 0xfffff
+
+void acpigen_write_len_f(struct acpi_ctx *ctx)
+{
+ assert(ctx->ltop < (ACPIGEN_LENSTACK_SIZE - 1));
+ ctx->len_stack[ctx->ltop++] = ctx->current;
+ acpigen_emit_byte(ctx, 0);
+ acpigen_emit_byte(ctx, 0);
+ acpigen_emit_byte(ctx, 0);
+}
+
+void acpigen_pop_len(struct acpi_ctx *ctx)
+{
+ int len;
+ char *p;
+
+ assert(ctx->ltop > 0);
+ p = ctx->len_stack[--ctx->ltop];
+ len = ctx->current - (void *)p;
+ assert(len <= ACPIGEN_MAXLEN);
+ /* generate store length for 0xfffff max */
+ p[0] = ACPI_PKG_LEN_3_BYTES | (len & 0xf);
+ p[1] = len >> 4 & 0xff;
+ p[2] = len >> 12 & 0xff;
+}
+
+void acpigen_emit_ext_op(struct acpi_ctx *ctx, uint op)
+{
+ acpigen_emit_byte(ctx, EXT_OP_PREFIX);
+ acpigen_emit_byte(ctx, op);
+}
+
+char *acpigen_write_package(struct acpi_ctx *ctx, int nr_el)
+{
+ char *p;
+
+ acpigen_emit_byte(ctx, PACKAGE_OP);
+ acpigen_write_len_f(ctx);
+ p = ctx->current;
+ acpigen_emit_byte(ctx, nr_el);
+
+ return p;
+}
+
+void acpigen_write_byte(struct acpi_ctx *ctx, unsigned int data)
+{
+ acpigen_emit_byte(ctx, BYTE_PREFIX);
+ acpigen_emit_byte(ctx, data & 0xff);
+}
+
+void acpigen_write_word(struct acpi_ctx *ctx, unsigned int data)
+{
+ acpigen_emit_byte(ctx, WORD_PREFIX);
+ acpigen_emit_word(ctx, data);
+}
+
+void acpigen_write_dword(struct acpi_ctx *ctx, unsigned int data)
+{
+ acpigen_emit_byte(ctx, DWORD_PREFIX);
+ acpigen_emit_dword(ctx, data);
+}
+
+void acpigen_write_qword(struct acpi_ctx *ctx, u64 data)
+{
+ acpigen_emit_byte(ctx, QWORD_PREFIX);
+ acpigen_emit_dword(ctx, data & 0xffffffff);
+ acpigen_emit_dword(ctx, (data >> 32) & 0xffffffff);
+}
+
+void acpigen_write_zero(struct acpi_ctx *ctx)
+{
+ acpigen_emit_byte(ctx, ZERO_OP);
+}
+
+void acpigen_write_one(struct acpi_ctx *ctx)
+{
+ acpigen_emit_byte(ctx, ONE_OP);
+}
+
+void acpigen_write_integer(struct acpi_ctx *ctx, u64 data)
+{
+ if (data == 0)
+ acpigen_write_zero(ctx);
+ else if (data == 1)
+ acpigen_write_one(ctx);
+ else if (data <= 0xff)
+ acpigen_write_byte(ctx, (unsigned char)data);
+ else if (data <= 0xffff)
+ acpigen_write_word(ctx, (unsigned int)data);
+ else if (data <= 0xffffffff)
+ acpigen_write_dword(ctx, (unsigned int)data);
+ else
+ acpigen_write_qword(ctx, data);
+}
+
+void acpigen_write_name_zero(struct acpi_ctx *ctx, const char *name)
+{
+ acpigen_write_name(ctx, name);
+ acpigen_write_zero(ctx);
+}
+
+void acpigen_write_name_one(struct acpi_ctx *ctx, const char *name)
+{
+ acpigen_write_name(ctx, name);
+ acpigen_write_one(ctx);
+}
+
+void acpigen_write_name_byte(struct acpi_ctx *ctx, const char *name, uint val)
+{
+ acpigen_write_name(ctx, name);
+ acpigen_write_byte(ctx, val);
+}
+
+void acpigen_write_name_word(struct acpi_ctx *ctx, const char *name, uint val)
+{
+ acpigen_write_name(ctx, name);
+ acpigen_write_word(ctx, val);
+}
+
+void acpigen_write_name_dword(struct acpi_ctx *ctx, const char *name, uint val)
+{
+ acpigen_write_name(ctx, name);
+ acpigen_write_dword(ctx, val);
+}
+
+void acpigen_write_name_qword(struct acpi_ctx *ctx, const char *name, u64 val)
+{
+ acpigen_write_name(ctx, name);
+ acpigen_write_qword(ctx, val);
+}
+
+void acpigen_write_name_integer(struct acpi_ctx *ctx, const char *name, u64 val)
+{
+ acpigen_write_name(ctx, name);
+ acpigen_write_integer(ctx, val);
+}
+
+void acpigen_write_name_string(struct acpi_ctx *ctx, const char *name,
+ const char *string)
+{
+ acpigen_write_name(ctx, name);
+ acpigen_write_string(ctx, string);
+}
+
+void acpigen_emit_stream(struct acpi_ctx *ctx, const char *data, int size)
+{
+ int i;
+
+ for (i = 0; i < size; i++)
+ acpigen_emit_byte(ctx, data[i]);
+}
+
+void acpigen_emit_string(struct acpi_ctx *ctx, const char *str)
+{
+ acpigen_emit_stream(ctx, str, str ? strlen(str) : 0);
+ acpigen_emit_byte(ctx, '\0');
+}
+
+void acpigen_write_string(struct acpi_ctx *ctx, const char *str)
+{
+ acpigen_emit_byte(ctx, STRING_PREFIX);
+ acpigen_emit_string(ctx, str);
+}
+
+/*
+ * The naming conventions for ACPI namespace names are a bit tricky as
+ * each element has to be 4 chars wide ("All names are a fixed 32 bits.")
+ * and "By convention, when an ASL compiler pads a name shorter than 4
+ * characters, it is done so with trailing underscores ('_')".
+ *
+ * Check sections 5.3, 20.2.2 and 20.4 of ACPI spec 6.3 for details.
+ */
+static void acpigen_emit_simple_namestring(struct acpi_ctx *ctx,
+ const char *name)
+{
+ const char *ptr;
+ int i;
+
+ for (i = 0, ptr = name; i < 4; i++) {
+ if (!*ptr || *ptr == '.')
+ acpigen_emit_byte(ctx, '_');
+ else
+ acpigen_emit_byte(ctx, *ptr++);
+ }
+}
+
+static void acpigen_emit_double_namestring(struct acpi_ctx *ctx,
+ const char *name, int dotpos)
+{
+ acpigen_emit_byte(ctx, DUAL_NAME_PREFIX);
+ acpigen_emit_simple_namestring(ctx, name);
+ acpigen_emit_simple_namestring(ctx, &name[dotpos + 1]);
+}
+
+static void acpigen_emit_multi_namestring(struct acpi_ctx *ctx,
+ const char *name)
+{
+ unsigned char *pathlen;
+ int count = 0;
+
+ acpigen_emit_byte(ctx, MULTI_NAME_PREFIX);
+ pathlen = ctx->current;
+ acpigen_emit_byte(ctx, 0);
+
+ while (*name) {
+ acpigen_emit_simple_namestring(ctx, name);
+ /* find end or next entity */
+ while (*name != '.' && *name)
+ name++;
+ /* forward to next */
+ if (*name == '.')
+ name++;
+ count++;
+ }
+
+ *pathlen = count;
+}
+
+void acpigen_emit_namestring(struct acpi_ctx *ctx, const char *namepath)
+{
+ int dotcount;
+ int dotpos;
+ int i;
+
+ /* We can start with a '\' */
+ if (*namepath == '\\') {
+ acpigen_emit_byte(ctx, '\\');
+ namepath++;
+ }
+
+ /* And there can be any number of '^' */
+ while (*namepath == '^') {
+ acpigen_emit_byte(ctx, '^');
+ namepath++;
+ }
+
+ for (i = 0, dotcount = 0; namepath[i]; i++) {
+ if (namepath[i] == '.') {
+ dotcount++;
+ dotpos = i;
+ }
+ }
+
+ /* If we have only \\ or only ^* then we need to add a null name */
+ if (!*namepath)
+ acpigen_emit_byte(ctx, ZERO_OP);
+ else if (dotcount == 0)
+ acpigen_emit_simple_namestring(ctx, namepath);
+ else if (dotcount == 1)
+ acpigen_emit_double_namestring(ctx, namepath, dotpos);
+ else
+ acpigen_emit_multi_namestring(ctx, namepath);
+}
+
+void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath)
+{
+ acpigen_emit_byte(ctx, NAME_OP);
+ acpigen_emit_namestring(ctx, namepath);
+}
+
+void acpigen_write_scope(struct acpi_ctx *ctx, const char *scope)
+{
+ acpigen_emit_byte(ctx, SCOPE_OP);
+ acpigen_write_len_f(ctx);
+ acpigen_emit_namestring(ctx, scope);
+}
+
+static void acpigen_write_method_internal(struct acpi_ctx *ctx,
+ const char *name, uint flags)
+{
+ acpigen_emit_byte(ctx, METHOD_OP);
+ acpigen_write_len_f(ctx);
+ acpigen_emit_namestring(ctx, name);
+ acpigen_emit_byte(ctx, flags);
+}
+
+/* Method (name, nargs, NotSerialized) */
+void acpigen_write_method(struct acpi_ctx *ctx, const char *name, int nargs)
+{
+ acpigen_write_method_internal(ctx, name,
+ nargs & ACPI_METHOD_NARGS_MASK);
+}
+
+/* Method (name, nargs, Serialized) */
+void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name,
+ int nargs)
+{
+ acpigen_write_method_internal(ctx, name,
+ (nargs & ACPI_METHOD_NARGS_MASK) |
+ ACPI_METHOD_SERIALIZED_MASK);
+}
+
+void acpigen_write_device(struct acpi_ctx *ctx, const char *name)
+{
+ acpigen_emit_ext_op(ctx, DEVICE_OP);
+ acpigen_write_len_f(ctx);
+ acpigen_emit_namestring(ctx, name);
+}
+
+void acpigen_write_sta(struct acpi_ctx *ctx, uint status)
+{
+ /* Method (_STA, 0, NotSerialized) { Return (status) } */
+ acpigen_write_method(ctx, "_STA", 0);
+ acpigen_emit_byte(ctx, RETURN_OP);
+ acpigen_write_byte(ctx, status);
+ acpigen_pop_len(ctx);
+}
+
+static void acpigen_write_register(struct acpi_ctx *ctx,
+ const struct acpi_gen_regaddr *addr)
+{
+ /* See ACPI v6.3 section 6.4.3.7: Generic Register Descriptor */
+ acpigen_emit_byte(ctx, ACPI_DESCRIPTOR_REGISTER);
+ acpigen_emit_byte(ctx, 0x0c); /* Register Length 7:0 */
+ acpigen_emit_byte(ctx, 0x00); /* Register Length 15:8 */
+ acpigen_emit_byte(ctx, addr->space_id);
+ acpigen_emit_byte(ctx, addr->bit_width);
+ acpigen_emit_byte(ctx, addr->bit_offset);
+ acpigen_emit_byte(ctx, addr->access_size);
+ acpigen_emit_dword(ctx, addr->addrl);
+ acpigen_emit_dword(ctx, addr->addrh);
+}
+
+void acpigen_write_resourcetemplate_header(struct acpi_ctx *ctx)
+{
+ /*
+ * A ResourceTemplate() is a Buffer() with a
+ * (Byte|Word|DWord) containing the length, followed by one or more
+ * resource items, terminated by the end tag.
+ * (small item 0xf, len 1)
+ */
+ acpigen_emit_byte(ctx, BUFFER_OP);
+ acpigen_write_len_f(ctx);
+ acpigen_emit_byte(ctx, WORD_PREFIX);
+ ctx->len_stack[ctx->ltop++] = ctx->current;
+
+ /*
+ * Add two dummy bytes for the ACPI word (keep aligned with the
+ * calculation in acpigen_write_resourcetemplate_footer() below)
+ */
+ acpigen_emit_byte(ctx, 0x00);
+ acpigen_emit_byte(ctx, 0x00);
+}
+
+void acpigen_write_resourcetemplate_footer(struct acpi_ctx *ctx)
+{
+ char *p = ctx->len_stack[--ctx->ltop];
+ int len;
+ /*
+ * See ACPI v6.3 section 6.4.2.9: End Tag
+ * 0x79 <checksum>
+ * 0x00 is treated as a good checksum according to the spec
+ * and is what iasl generates.
+ */
+ acpigen_emit_byte(ctx, ACPI_END_TAG);
+ acpigen_emit_byte(ctx, 0x00);
+
+ /*
+ * Start counting past the 2-bytes length added in
+ * acpigen_write_resourcetemplate_header() above
+ */
+ len = (char *)ctx->current - (p + 2);
+
+ /* patch len word */
+ p[0] = len & 0xff;
+ p[1] = (len >> 8) & 0xff;
+
+ acpigen_pop_len(ctx);
+}
+
+void acpigen_write_register_resource(struct acpi_ctx *ctx,
+ const struct acpi_gen_regaddr *addr)
+{
+ acpigen_write_resourcetemplate_header(ctx);
+ acpigen_write_register(ctx, addr);
+ acpigen_write_resourcetemplate_footer(ctx);
+}
+
+/*
+ * ToUUID(uuid)
+ *
+ * ACPI 6.3 Section 19.6.142 table 19-438 defines a special output order for the
+ * bytes that make up a UUID Buffer object:
+ *
+ * UUID byte order for input to this function:
+ * aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
+ *
+ * UUID byte order output by this function:
+ * ddccbbaa-ffee-hhgg-iijj-kkllmmnnoopp
+ */
+int acpigen_write_uuid(struct acpi_ctx *ctx, const char *uuid)
+{
+ u8 buf[UUID_BIN_LEN];
+ int ret;
+
+ /* Parse UUID string into bytes */
+ ret = uuid_str_to_bin(uuid, buf, UUID_STR_FORMAT_GUID);
+ if (ret)
+ return log_msg_ret("bad hex", -EINVAL);
+
+ /* BufferOp */
+ acpigen_emit_byte(ctx, BUFFER_OP);
+ acpigen_write_len_f(ctx);
+
+ /* Buffer length in bytes */
+ acpigen_write_word(ctx, UUID_BIN_LEN);
+
+ /* Output UUID in expected order */
+ acpigen_emit_stream(ctx, (char *)buf, UUID_BIN_LEN);
+
+ acpigen_pop_len(ctx);
+
+ return 0;
+}
+
+void acpigen_write_power_res(struct acpi_ctx *ctx, const char *name, uint level,
+ uint order, const char *const dev_states[],
+ size_t dev_states_count)
+{
+ size_t i;
+
+ for (i = 0; i < dev_states_count; i++) {
+ acpigen_write_name(ctx, dev_states[i]);
+ acpigen_write_package(ctx, 1);
+ acpigen_emit_simple_namestring(ctx, name);
+ acpigen_pop_len(ctx); /* Package */
+ }
+
+ acpigen_emit_ext_op(ctx, POWER_RES_OP);
+
+ acpigen_write_len_f(ctx);
+
+ acpigen_emit_simple_namestring(ctx, name);
+ acpigen_emit_byte(ctx, level);
+ acpigen_emit_word(ctx, order);
+}
+
+/* Sleep (ms) */
+void acpigen_write_sleep(struct acpi_ctx *ctx, u64 sleep_ms)
+{
+ acpigen_emit_ext_op(ctx, SLEEP_OP);
+ acpigen_write_integer(ctx, sleep_ms);
+}
+
+void acpigen_write_store(struct acpi_ctx *ctx)
+{
+ acpigen_emit_byte(ctx, STORE_OP);
+}
+
+/* Or (arg1, arg2, res) */
+void acpigen_write_or(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res)
+{
+ acpigen_emit_byte(ctx, OR_OP);
+ acpigen_emit_byte(ctx, arg1);
+ acpigen_emit_byte(ctx, arg2);
+ acpigen_emit_byte(ctx, res);
+}
+
+/* And (arg1, arg2, res) */
+void acpigen_write_and(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res)
+{
+ acpigen_emit_byte(ctx, AND_OP);
+ acpigen_emit_byte(ctx, arg1);
+ acpigen_emit_byte(ctx, arg2);
+ acpigen_emit_byte(ctx, res);
+}
+
+/* Not (arg, res) */
+void acpigen_write_not(struct acpi_ctx *ctx, u8 arg, u8 res)
+{
+ acpigen_emit_byte(ctx, NOT_OP);
+ acpigen_emit_byte(ctx, arg);
+ acpigen_emit_byte(ctx, res);
+}
+
+/* Store (str, DEBUG) */
+void acpigen_write_debug_string(struct acpi_ctx *ctx, const char *str)
+{
+ acpigen_write_store(ctx);
+ acpigen_write_string(ctx, str);
+ acpigen_emit_ext_op(ctx, DEBUG_OP);
+}
+
+/**
+ * acpigen_get_dw0_in_local5() - Generate code to put dw0 cfg0 in local5
+ *
+ * Store (\_SB.GPC0 (addr), Local5)
+ *
+ * \_SB.GPC0 is used to read cfg0 value from dw0. It is typically defined in
+ * the board's gpiolib.asl
+ *
+ * The value needs to be stored in a local variable so that it can be used in
+ * expressions in the ACPI code.
+ *
+ * @ctx: ACPI context pointer
+ * @dw0_read: Name to use to read dw0, e.g. "\\_SB.GPC0"
+ * @addr: GPIO pin configuration register address
+ *
+ */
+static void acpigen_get_dw0_in_local5(struct acpi_ctx *ctx,
+ const char *dw0_read, ulong addr)
+{
+ acpigen_write_store(ctx);
+ acpigen_emit_namestring(ctx, dw0_read);
+ acpigen_write_integer(ctx, addr);
+ acpigen_emit_byte(ctx, LOCAL5_OP);
+}
+
+/**
+ * acpigen_set_gpio_val() - Emit code to set value of TX GPIO to on/off
+ *
+ * @ctx: ACPI context pointer
+ * @dw0_read: Method name to use to read dw0, e.g. "\\_SB.GPC0"
+ * @dw0_write: Method name to use to read dw0, e.g. "\\_SB.SPC0"
+ * @gpio_num: GPIO number to adjust
+ * @vaL: true to set on, false to set off
+ */
+static int acpigen_set_gpio_val(struct acpi_ctx *ctx, u32 tx_state_val,
+ const char *dw0_read, const char *dw0_write,
+ struct acpi_gpio *gpio, bool val)
+{
+ acpigen_get_dw0_in_local5(ctx, dw0_read, gpio->pin0_addr);
+
+ /* Store (0x40, Local0) */
+ acpigen_write_store(ctx);
+ acpigen_write_integer(ctx, tx_state_val);
+ acpigen_emit_byte(ctx, LOCAL0_OP);
+
+ if (val) {
+ /* Or (Local5, PAD_CFG0_TX_STATE, Local5) */
+ acpigen_write_or(ctx, LOCAL5_OP, LOCAL0_OP, LOCAL5_OP);
+ } else {
+ /* Not (PAD_CFG0_TX_STATE, Local6) */
+ acpigen_write_not(ctx, LOCAL0_OP, LOCAL6_OP);
+
+ /* And (Local5, Local6, Local5) */
+ acpigen_write_and(ctx, LOCAL5_OP, LOCAL6_OP, LOCAL5_OP);
+ }
+
+ /*
+ * \_SB.SPC0 (addr, Local5)
+ * \_SB.SPC0 is used to write cfg0 value in dw0. It is defined in
+ * gpiolib.asl.
+ */
+ acpigen_emit_namestring(ctx, dw0_write);
+ acpigen_write_integer(ctx, gpio->pin0_addr);
+ acpigen_emit_byte(ctx, LOCAL5_OP);
+
+ return 0;
+}
+
+int acpigen_set_enable_tx_gpio(struct acpi_ctx *ctx, u32 tx_state_val,
+ const char *dw0_read, const char *dw0_write,
+ struct acpi_gpio *gpio, bool enable)
+{
+ bool set;
+ int ret;
+
+ set = gpio->polarity == ACPI_GPIO_ACTIVE_HIGH ? enable : !enable;
+ ret = acpigen_set_gpio_val(ctx, tx_state_val, dw0_read, dw0_write, gpio,
+ set);
+ if (ret)
+ return log_msg_ret("call", ret);
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 21:24:54 +0000