Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 329 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c
new file mode 100644
index 000000000..6228d0b24
--- /dev/null
+++ b/drivers/rtc/rtc-hid-sensor-time.c
@@ -0,0 +1,329 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * HID Sensor Time Driver
+ * Copyright (c) 2012, Alexander Holler.
+ */
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/rtc.h>
+
+enum hid_time_channel {
+	CHANNEL_SCAN_INDEX_YEAR,
+	CHANNEL_SCAN_INDEX_MONTH,
+	CHANNEL_SCAN_INDEX_DAY,
+	CHANNEL_SCAN_INDEX_HOUR,
+	CHANNEL_SCAN_INDEX_MINUTE,
+	CHANNEL_SCAN_INDEX_SECOND,
+	TIME_RTC_CHANNEL_MAX,
+};
+
+struct hid_time_state {
+	struct hid_sensor_hub_callbacks callbacks;
+	struct hid_sensor_common common_attributes;
+	struct hid_sensor_hub_attribute_info info[TIME_RTC_CHANNEL_MAX];
+	struct rtc_time last_time;
+	spinlock_t lock_last_time;
+	struct completion comp_last_time;
+	struct rtc_time time_buf;
+	struct rtc_device *rtc;
+};
+
+static const u32 hid_time_addresses[TIME_RTC_CHANNEL_MAX] = {
+	HID_USAGE_SENSOR_TIME_YEAR,
+	HID_USAGE_SENSOR_TIME_MONTH,
+	HID_USAGE_SENSOR_TIME_DAY,
+	HID_USAGE_SENSOR_TIME_HOUR,
+	HID_USAGE_SENSOR_TIME_MINUTE,
+	HID_USAGE_SENSOR_TIME_SECOND,
+};
+
+/* Channel names for verbose error messages */
+static const char * const hid_time_channel_names[TIME_RTC_CHANNEL_MAX] = {
+	"year", "month", "day", "hour", "minute", "second",
+};
+
+/* Callback handler to send event after all samples are received and captured */
+static int hid_time_proc_event(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id, void *priv)
+{
+	unsigned long flags;
+	struct hid_time_state *time_state = platform_get_drvdata(priv);
+
+	spin_lock_irqsave(&time_state->lock_last_time, flags);
+	time_state->last_time = time_state->time_buf;
+	spin_unlock_irqrestore(&time_state->lock_last_time, flags);
+	complete(&time_state->comp_last_time);
+	return 0;
+}
+
+static u32 hid_time_value(size_t raw_len, char *raw_data)
+{
+	switch (raw_len) {
+	case 1:
+		return *(u8 *)raw_data;
+	case 2:
+		return *(u16 *)raw_data;
+	case 4:
+		return *(u32 *)raw_data;
+	default:
+		return (u32)(~0U); /* 0xff... or -1 to denote an error */
+	}
+}
+
+static int hid_time_capture_sample(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id, size_t raw_len,
+				char *raw_data, void *priv)
+{
+	struct hid_time_state *time_state = platform_get_drvdata(priv);
+	struct rtc_time *time_buf = &time_state->time_buf;
+
+	switch (usage_id) {
+	case HID_USAGE_SENSOR_TIME_YEAR:
+		/*
+		 * The draft for HID-sensors (HUTRR39) currently doesn't define
+		 * the range for the year attribute. Therefor we support
+		 * 8 bit (0-99) and 16 or 32 bits (full) as size for the year.
+		 */
+		if (raw_len == 1) {
+			time_buf->tm_year = *(u8 *)raw_data;
+			if (time_buf->tm_year < 70)
+				/* assume we are in 1970...2069 */
+				time_buf->tm_year += 100;
+		} else
+			time_buf->tm_year =
+				(int)hid_time_value(raw_len, raw_data)-1900;
+		break;
+	case HID_USAGE_SENSOR_TIME_MONTH:
+		/* sensors are sending the month as 1-12, we need 0-11 */
+		time_buf->tm_mon = (int)hid_time_value(raw_len, raw_data)-1;
+		break;
+	case HID_USAGE_SENSOR_TIME_DAY:
+		time_buf->tm_mday = (int)hid_time_value(raw_len, raw_data);
+		break;
+	case HID_USAGE_SENSOR_TIME_HOUR:
+		time_buf->tm_hour = (int)hid_time_value(raw_len, raw_data);
+		break;
+	case HID_USAGE_SENSOR_TIME_MINUTE:
+		time_buf->tm_min = (int)hid_time_value(raw_len, raw_data);
+		break;
+	case HID_USAGE_SENSOR_TIME_SECOND:
+		time_buf->tm_sec = (int)hid_time_value(raw_len, raw_data);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/* small helper, haven't found any other way */
+static const char *hid_time_attrib_name(u32 attrib_id)
+{
+	static const char unknown[] = "unknown";
+	unsigned i;
+
+	for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i) {
+		if (hid_time_addresses[i] == attrib_id)
+			return hid_time_channel_names[i];
+	}
+	return unknown; /* should never happen */
+}
+
+static int hid_time_parse_report(struct platform_device *pdev,
+				struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id,
+				struct hid_time_state *time_state)
+{
+	int report_id, i;
+
+	for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i)
+		if (sensor_hub_input_get_attribute_info(hsdev,
+				HID_INPUT_REPORT, usage_id,
+				hid_time_addresses[i],
+				&time_state->info[i]) < 0)
+			return -EINVAL;
+	/* Check the (needed) attributes for sanity */
+	report_id = time_state->info[0].report_id;
+	if (report_id < 0) {
+		dev_err(&pdev->dev, "bad report ID!\n");
+		return -EINVAL;
+	}
+	for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i) {
+		if (time_state->info[i].report_id != report_id) {
+			dev_err(&pdev->dev,
+				"not all needed attributes inside the same report!\n");
+			return -EINVAL;
+		}
+		if (time_state->info[i].size == 3 ||
+				time_state->info[i].size > 4) {
+			dev_err(&pdev->dev,
+				"attribute '%s' not 8, 16 or 32 bits wide!\n",
+				hid_time_attrib_name(
+					time_state->info[i].attrib_id));
+			return -EINVAL;
+		}
+		if (time_state->info[i].units !=
+				HID_USAGE_SENSOR_UNITS_NOT_SPECIFIED &&
+				/* allow attribute seconds with unit seconds */
+				!(time_state->info[i].attrib_id ==
+				HID_USAGE_SENSOR_TIME_SECOND &&
+				time_state->info[i].units ==
+				HID_USAGE_SENSOR_UNITS_SECOND)) {
+			dev_err(&pdev->dev,
+				"attribute '%s' hasn't a unit of type 'none'!\n",
+				hid_time_attrib_name(
+					time_state->info[i].attrib_id));
+			return -EINVAL;
+		}
+		if (time_state->info[i].unit_expo) {
+			dev_err(&pdev->dev,
+				"attribute '%s' hasn't a unit exponent of 1!\n",
+				hid_time_attrib_name(
+					time_state->info[i].attrib_id));
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int hid_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	unsigned long flags;
+	struct hid_time_state *time_state = dev_get_drvdata(dev);
+	int ret;
+
+	reinit_completion(&time_state->comp_last_time);
+	/* get a report with all values through requesting one value */
+	sensor_hub_input_attr_get_raw_value(time_state->common_attributes.hsdev,
+			HID_USAGE_SENSOR_TIME, hid_time_addresses[0],
+			time_state->info[0].report_id, SENSOR_HUB_SYNC, false);
+	/* wait for all values (event) */
+	ret = wait_for_completion_killable_timeout(
+			&time_state->comp_last_time, HZ*6);
+	if (ret > 0) {
+		/* no error */
+		spin_lock_irqsave(&time_state->lock_last_time, flags);
+		*tm = time_state->last_time;
+		spin_unlock_irqrestore(&time_state->lock_last_time, flags);
+		return 0;
+	}
+	if (!ret)
+		return -EIO; /* timeouted */
+	return ret; /* killed (-ERESTARTSYS) */
+}
+
+static const struct rtc_class_ops hid_time_rtc_ops = {
+	.read_time = hid_rtc_read_time,
+};
+
+static int hid_time_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+	struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
+	struct hid_time_state *time_state = devm_kzalloc(&pdev->dev,
+		sizeof(struct hid_time_state), GFP_KERNEL);
+
+	if (time_state == NULL)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, time_state);
+
+	spin_lock_init(&time_state->lock_last_time);
+	init_completion(&time_state->comp_last_time);
+	time_state->common_attributes.hsdev = hsdev;
+	time_state->common_attributes.pdev = pdev;
+
+	ret = hid_sensor_parse_common_attributes(hsdev,
+				HID_USAGE_SENSOR_TIME,
+				&time_state->common_attributes,
+				NULL,
+				0);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup common attributes!\n");
+		return ret;
+	}
+
+	ret = hid_time_parse_report(pdev, hsdev, HID_USAGE_SENSOR_TIME,
+					time_state);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup attributes!\n");
+		return ret;
+	}
+
+	time_state->callbacks.send_event = hid_time_proc_event;
+	time_state->callbacks.capture_sample = hid_time_capture_sample;
+	time_state->callbacks.pdev = pdev;
+	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_TIME,
+					&time_state->callbacks);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "register callback failed!\n");
+		return ret;
+	}
+
+	ret = sensor_hub_device_open(hsdev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to open sensor hub device!\n");
+		goto err_open;
+	}
+
+	/*
+	 * Enable HID input processing early in order to be able to read the
+	 * clock already in devm_rtc_device_register().
+	 */
+	hid_device_io_start(hsdev->hdev);
+
+	time_state->rtc = devm_rtc_device_register(&pdev->dev,
+					"hid-sensor-time", &hid_time_rtc_ops,
+					THIS_MODULE);
+
+	if (IS_ERR(time_state->rtc)) {
+		hid_device_io_stop(hsdev->hdev);
+		ret = PTR_ERR(time_state->rtc);
+		time_state->rtc = NULL;
+		dev_err(&pdev->dev, "rtc device register failed!\n");
+		goto err_rtc;
+	}
+
+	return ret;
+
+err_rtc:
+	sensor_hub_device_close(hsdev);
+err_open:
+	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME);
+	return ret;
+}
+
+static void hid_time_remove(struct platform_device *pdev)
+{
+	struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
+
+	sensor_hub_device_close(hsdev);
+	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME);
+}
+
+static const struct platform_device_id hid_time_ids[] = {
+	{
+		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+		.name = "HID-SENSOR-2000a0",
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_time_ids);
+
+static struct platform_driver hid_time_platform_driver = {
+	.id_table = hid_time_ids,
+	.driver = {
+		.name	= KBUILD_MODNAME,
+	},
+	.probe		= hid_time_probe,
+	.remove		= hid_time_remove,
+};
+module_platform_driver(hid_time_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Time");
+MODULE_AUTHOR("Alexander Holler <holler@ahsoftware.de>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_HID");