drivers/nxp/uwb: Add new driver for NXP UWB SR1xx chip
Add a new driver for NXP UWB SR1xx (e.g., SR150) device.
The driver was originally written by Tim Wawrzynczak as a WIP in
CL:3503703, and was based on drivers/spi/acpi.
BUG=b:240607130
BRANCH=firmware-brya-14505.B
TEST=On ghost (with follow-up CL), patch linux with NXP's pending
drivers
-> UWB device is probed and can respond to a simple hello
packet
Co-authored-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Signed-off-by: Jack Rosenthal <jrosenth@chromium.org>
Change-Id: I5b1b0a5c1b48d0b09e7ab5f2ea6b6bc2fba2a7d8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66466
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/nxp/uwb/uwb.c b/src/drivers/nxp/uwb/uwb.c
new file mode 100644
index 0000000..978edeb
--- /dev/null
+++ b/src/drivers/nxp/uwb/uwb.c
@@ -0,0 +1,138 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi_device.h>
+#include <acpi/acpigen.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <device/spi.h>
+#include <spi-generic.h>
+#include <string.h>
+#include "chip.h"
+
+static int spi_acpi_get_bus(const struct device *dev)
+{
+ struct device *spi_dev;
+ struct device_operations *ops;
+
+ if (!dev->bus || !dev->bus->dev)
+ return -1;
+
+ spi_dev = dev->bus->dev;
+ ops = spi_dev->ops;
+
+ if (ops && ops->ops_spi_bus && ops->ops_spi_bus->dev_to_bus)
+ return ops->ops_spi_bus->dev_to_bus(spi_dev);
+
+ return -1;
+}
+
+static int write_gpio(struct acpi_gpio *gpio, int *curr_index)
+{
+ int ret = -1;
+
+ if (gpio->pin_count == 0)
+ return ret;
+
+ acpi_device_write_gpio(gpio);
+ ret = *curr_index;
+ (*curr_index)++;
+
+ return ret;
+}
+
+static void nxp_uwb_fill_ssdt(const struct device *dev)
+{
+ struct drivers_nxp_uwb_config *config = dev->chip_info;
+ const char *scope = acpi_device_scope(dev);
+ const char *path = acpi_device_path(dev);
+ struct acpi_spi spi = {
+ .device_select = dev->path.spi.cs,
+ .speed = config->speed ? : 1 * MHz,
+ .resource = scope,
+ .device_select_polarity = SPI_POLARITY_LOW,
+ .wire_mode = SPI_4_WIRE_MODE,
+ .data_bit_length = 8,
+ .clock_phase = SPI_CLOCK_PHASE_FIRST,
+ .clock_polarity = SPI_POLARITY_LOW,
+ };
+ int curr_index = 0;
+ int irq_gpio_index = -1;
+ int ce_gpio_index = -1;
+ int ri_gpio_index = -1;
+
+ if (!scope)
+ return;
+
+ if (spi_acpi_get_bus(dev) == -1) {
+ printk(BIOS_ERR, "%s: Cannot get bus for device.\n",
+ dev_path(dev));
+ return;
+ }
+
+ /* Device */
+ acpigen_write_scope(scope);
+ acpigen_write_device(acpi_device_name(dev));
+ acpigen_write_name_string("_HID", ACPI_DT_NAMESPACE_HID);
+ acpigen_write_name_integer("_UID", config->uid);
+ if (config->desc)
+ acpigen_write_name_string("_DDN", config->desc);
+ acpigen_write_STA(acpi_device_status(dev));
+
+ /* Resources */
+ acpigen_write_name("_CRS");
+ acpigen_write_resourcetemplate_header();
+ acpi_device_write_spi(&spi);
+ irq_gpio_index = write_gpio(&config->irq_gpio, &curr_index);
+ ce_gpio_index = write_gpio(&config->ce_gpio, &curr_index);
+ ri_gpio_index = write_gpio(&config->ri_gpio, &curr_index);
+ acpigen_write_resourcetemplate_footer();
+
+ struct acpi_dp *dsd = acpi_dp_new_table("_DSD");
+ acpi_dp_add_string(dsd, "compatible", "nxp,sr1xx");
+ acpi_dp_add_gpio(dsd, "nxp,sr1xx-irq-gpios", path, irq_gpio_index, 0,
+ config->irq_gpio.active_low);
+
+ acpi_dp_add_gpio(dsd, "nxp,sr1xx-ce-gpios", path, ce_gpio_index, 0,
+ config->ce_gpio.active_low);
+
+ acpi_dp_add_gpio(dsd, "nxp,sr1xx-ri-gpios", path, ri_gpio_index, 0,
+ config->ri_gpio.active_low);
+ acpi_dp_write(dsd);
+
+ acpigen_write_device_end();
+ acpigen_write_scope_end();
+
+ printk(BIOS_INFO, "%s: %s at %s\n", path,
+ config->desc ? : dev->chip_ops->name, dev_path(dev));
+}
+
+static const char *nxp_uwb_name(const struct device *dev)
+{
+ struct drivers_nxp_uwb_config *config = dev->chip_info;
+ static char name[ACPI_NAME_BUFFER_SIZE];
+
+ if (config->name)
+ snprintf(name, sizeof(name), "%s", config->name);
+ else
+ snprintf(name, sizeof(name), "UWB%1X", spi_acpi_get_bus(dev));
+ name[4] = '\0';
+ return name;
+}
+
+static struct device_operations nxp_uwb_ops = {
+ .read_resources = noop_read_resources,
+ .set_resources = noop_set_resources,
+ .acpi_name = nxp_uwb_name,
+ .acpi_fill_ssdt = nxp_uwb_fill_ssdt,
+};
+
+static void nxb_uwb_enable(struct device *dev)
+{
+ dev->ops = &nxp_uwb_ops;
+}
+
+struct chip_operations drivers_nxp_uwb_ops = {
+ CHIP_NAME("NXP UWB Device")
+ .enable_dev = nxb_uwb_enable
+};