drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c

Source file repositories/reference/linux-study-clean/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c

File Facts

System
Linux kernel
Corpus path
drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c
Extension
.c
Size
3760 bytes
Lines
166
Domain
Driver Families
Bucket
drivers/hid
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/hid.h>
#include <linux/input.h>
#include <linux/pm_runtime.h>

#include "quickspi-dev.h"
#include "quickspi-hid.h"

/**
 * quickspi_hid_parse() - HID core parse() callback
 *
 * @hid: HID device instance
 *
 * This function gets called during call to hid_add_device
 *
 * Return: 0 on success and non zero on error.
 */
static int quickspi_hid_parse(struct hid_device *hid)
{
	struct quickspi_device *qsdev = hid->driver_data;

	if (qsdev->report_descriptor)
		return hid_parse_report(hid, qsdev->report_descriptor,
					le16_to_cpu(qsdev->dev_desc.rep_desc_len));

	dev_err(qsdev->dev, "invalid report descriptor\n");
	return -EINVAL;
}

static int quickspi_hid_start(struct hid_device *hid)
{
	return 0;
}

static void quickspi_hid_stop(struct hid_device *hid)
{
}

static int quickspi_hid_open(struct hid_device *hid)
{
	return 0;
}

static void quickspi_hid_close(struct hid_device *hid)
{
}

static int quickspi_hid_raw_request(struct hid_device *hid,
				    unsigned char reportnum,
				    __u8 *buf, size_t len,
				    unsigned char rtype, int reqtype)
{
	struct quickspi_device *qsdev = hid->driver_data;
	int ret = 0;

	ret = pm_runtime_resume_and_get(qsdev->dev);
	if (ret)
		return ret;

	switch (reqtype) {
	case HID_REQ_GET_REPORT:
		ret = quickspi_get_report(qsdev, rtype, reportnum, buf);
		break;
	case HID_REQ_SET_REPORT:
		ret = quickspi_set_report(qsdev, rtype, reportnum, buf, len);
		break;
	default:
		dev_err_once(qsdev->dev, "Not supported request type %d\n", reqtype);
		break;
	}

	pm_runtime_put_autosuspend(qsdev->dev);

	return ret;
}

static int quickspi_hid_power(struct hid_device *hid, int lvl)
{
	return 0;
}

static struct hid_ll_driver quickspi_hid_ll_driver = {
	.parse = quickspi_hid_parse,
	.start = quickspi_hid_start,
	.stop = quickspi_hid_stop,
	.open = quickspi_hid_open,
	.close = quickspi_hid_close,
	.power = quickspi_hid_power,
	.raw_request = quickspi_hid_raw_request,
};

Annotation

Implementation Notes