drivers/hid/intel-ish-hid/ishtp/hbm.c

Source file repositories/reference/linux-study-clean/drivers/hid/intel-ish-hid/ishtp/hbm.c

File Facts

System
Linux kernel
Corpus path
drivers/hid/intel-ish-hid/ishtp/hbm.c
Extension
.c
Size
27577 bytes
Lines
1011
Domain
Driver Families
Bucket
drivers/hid
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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

if (cl->ts_rx) {
			ktime_t ts_diff = ktime_sub(cl->ts_out_fc, cl->ts_rx);
			if (ktime_after(ts_diff, cl->ts_max_fc_delay))
				cl->ts_max_fc_delay = ts_diff;
		}
	} else {
		++cl->err_send_fc;
	}

	spin_unlock_irqrestore(&cl->fc_spinlock, flags);
	return	rv;
}

/**
 * ishtp_hbm_cl_disconnect_req() - Send disconnect request
 * @dev: ISHTP device instance
 * @cl: ISHTP client instance
 *
 * Send disconnect message to fw
 *
 * Return: 0 if success else error code
 */
int ishtp_hbm_cl_disconnect_req(struct ishtp_device *dev, struct ishtp_cl *cl)
{
	struct ishtp_msg_hdr hdr;
	struct hbm_client_connect_request disconn_req;
	const size_t len = sizeof(disconn_req);

	ishtp_hbm_hdr(&hdr, len);
	ishtp_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, &disconn_req, len);

	return ishtp_write_message(dev, &hdr, &disconn_req);
}

/**
 * ishtp_hbm_cl_disconnect_res() - Get disconnect response
 * @dev: ISHTP device instance
 * @rs: Response message
 *
 * Received disconnect response from fw
 */
static void ishtp_hbm_cl_disconnect_res(struct ishtp_device *dev,
	struct hbm_client_connect_response *rs)
{
	struct ishtp_cl *cl = NULL;
	unsigned long	flags;

	spin_lock_irqsave(&dev->cl_list_lock, flags);
	list_for_each_entry(cl, &dev->cl_list, link) {
		if (!rs->status && ishtp_hbm_cl_addr_equal(cl, rs)) {
			cl->state = ISHTP_CL_DISCONNECTED;
			wake_up_interruptible(&cl->wait_ctrl_res);
			break;
		}
	}
	spin_unlock_irqrestore(&dev->cl_list_lock, flags);
}

/**
 * ishtp_hbm_cl_connect_req() - Send connect request
 * @dev: ISHTP device instance
 * @cl: client device instance
 *
 * Send connection request to specific fw client
 *
 * Return: 0 if success else error code
 */
int ishtp_hbm_cl_connect_req(struct ishtp_device *dev, struct ishtp_cl *cl)
{
	struct ishtp_msg_hdr hdr;
	struct hbm_client_connect_request conn_req;
	const size_t len = sizeof(conn_req);

	ishtp_hbm_hdr(&hdr, len);
	ishtp_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, &conn_req, len);

	return ishtp_write_message(dev, &hdr, &conn_req);
}

/**
 * ishtp_hbm_cl_connect_res() - Get connect response
 * @dev: ISHTP device instance
 * @rs: Response message
 *
 * Received connect response from fw
 */
static void ishtp_hbm_cl_connect_res(struct ishtp_device *dev,
	struct hbm_client_connect_response *rs)
{
	struct ishtp_cl *cl = NULL;

Annotation

Implementation Notes