1 // SPDX-License-Identifier: GPL-2.0-only
8  * To set ownership of camera sensor, there is specific command, which
9  * is sent via MEI protocol. That's a two-step scheme where the firmware
16  * The power line of camera sensor is directly connected to IVSC instead
17  * of host, when camera sensor ownership is switched to host, sensor is
43 /* size of camera status notification content */
63 /* identify camera sensor ownership */
71 	/* used to switch camera sensor to host */
74 	/* used to switch camera sensor to IVSC */
189 	hdr->type = ACE_CMD_SET;  in init_cmd_hdr()
190 	hdr->msg_tgt = ACE_DRV_MSG;  in init_cmd_hdr()
191 	hdr->init_block = ACE_CMD_INIT_BLOCK;  in init_cmd_hdr()
192 	hdr->final_block = ACE_CMD_FINAL_BLOCK;  in init_cmd_hdr()
198 	union ace_cmd_param *param = &cmd->param;  in construct_command()
199 	struct ace_cmd_hdr *hdr = &cmd->hdr;  in construct_command()
203 	hdr->cmd_id = cmd_id;  in construct_command()
206 		param->uuid = ACE_GET_FW_ID_UUID;  in construct_command()
207 		hdr->param_size = sizeof(param->uuid);  in construct_command()
210 		param->param = 0;  in construct_command()
211 		hdr->firmware_id = ace->firmware_id;  in construct_command()
212 		hdr->param_size = sizeof(param->param);  in construct_command()
215 		hdr->firmware_id = ace->firmware_id;  in construct_command()
218 		return -EINVAL;  in construct_command()
221 	return hdr->param_size + sizeof(cmd->hdr);  in construct_command()
228 	union ace_notif_hdr *resp_hdr = &ace->cmd_response.hdr;  in mei_ace_send()
229 	union ace_notif_hdr *ack_hdr = &ace->cmd_ack.hdr;  in mei_ace_send()
230 	struct ace_cmd_hdr *cmd_hdr = &cmd->hdr;  in mei_ace_send()
233 	mutex_lock(&ace->lock);  in mei_ace_send()
235 	reinit_completion(&ace->cmd_completion);  in mei_ace_send()
237 	ret = mei_cldev_send(ace->cldev, (u8 *)cmd, len);  in mei_ace_send()
241 	ret = wait_for_completion_killable_timeout(&ace->cmd_completion,  in mei_ace_send()
246 		ret = -ETIMEDOUT;  in mei_ace_send()
250 	if (ack_hdr->ack.cmd_id != cmd_hdr->cmd_id) {  in mei_ace_send()
251 		ret = -EINVAL;  in mei_ace_send()
256 	ret = ack_hdr->ack.status;  in mei_ace_send()
258 		ret = -EIO;  in mei_ace_send()
265 	ret = wait_for_completion_killable_timeout(&ace->cmd_completion,  in mei_ace_send()
270 		ret = -ETIMEDOUT;  in mei_ace_send()
276 	if (resp_hdr->response.cmd_id != cmd_hdr->cmd_id)  in mei_ace_send()
277 		ret = -EINVAL;  in mei_ace_send()
280 	mutex_unlock(&ace->lock);  in mei_ace_send()
326 	union ace_notif_hdr *hdr = &resp->hdr;  in handle_command_response()
328 	switch (hdr->response.cmd_id) {  in handle_command_response()
331 		memcpy(&ace->cmd_response, resp, len);  in handle_command_response()
332 		complete(&ace->cmd_completion);  in handle_command_response()
344 	union ace_notif_hdr *hdr = &ack->hdr;  in handle_command_ack()
346 	switch (hdr->ack.cmd_id) {  in handle_command_ack()
348 		ace->firmware_id = ack->cont.firmware_id;  in handle_command_ack()
352 		memcpy(&ace->cmd_ack, ack, len);  in handle_command_ack()
353 		complete(&ace->cmd_completion);  in handle_command_ack()
370 		dev_err(&cldev->dev, "recv error: %d\n", ret);  in mei_ace_rx()
374 	if (hdr->event.ack) {  in mei_ace_rx()
379 	switch (hdr->event.event_type) {  in mei_ace_rx()
388 		dev_dbg(&cldev->dev, "firmware ready\n");  in mei_ace_rx()
397 	struct device *dev = &ace->cldev->dev;  in mei_ace_setup_dev_link()
403 	snprintf(name, sizeof(name), "%s-%pUl", dev_name(dev->parent), &uuid);  in mei_ace_setup_dev_link()
405 	csi_dev = device_find_child_by_name(dev->parent, name);  in mei_ace_setup_dev_link()
407 		ret = -EPROBE_DEFER;  in mei_ace_setup_dev_link()
410 		ret = -EPROBE_DEFER;  in mei_ace_setup_dev_link()
415 	ace->csi_link = device_link_add(csi_dev, dev, DL_FLAG_PM_RUNTIME |  in mei_ace_setup_dev_link()
417 	if (!ace->csi_link) {  in mei_ace_setup_dev_link()
418 		ret = -EINVAL;  in mei_ace_setup_dev_link()
423 	ace->csi_dev = csi_dev;  in mei_ace_setup_dev_link()
434 /* switch camera to host before probe sensor device */
443 	dev = &ace->cldev->dev;  in mei_ace_post_probe_work()
447 		dev_err(dev, "switch camera to host failed: %d\n", ret);  in mei_ace_post_probe_work()
451 	adev = ACPI_COMPANION(dev->parent);  in mei_ace_post_probe_work()
461 	struct device *dev = &cldev->dev;  in mei_ace_probe()
467 		return -ENOMEM;  in mei_ace_probe()
469 	ace->cldev = cldev;  in mei_ace_probe()
470 	mutex_init(&ace->lock);  in mei_ace_probe()
471 	init_completion(&ace->cmd_completion);  in mei_ace_probe()
472 	INIT_WORK(&ace->work, mei_ace_post_probe_work);  in mei_ace_probe()
501 	schedule_work(&ace->work);  in mei_ace_probe()
513 	mutex_destroy(&ace->lock);  in mei_ace_probe()
522 	cancel_work_sync(&ace->work);  in mei_ace_remove()
524 	device_link_del(ace->csi_link);  in mei_ace_remove()
525 	put_device(ace->csi_dev);  in mei_ace_remove()
527 	pm_runtime_disable(&cldev->dev);  in mei_ace_remove()
528 	pm_runtime_set_suspended(&cldev->dev);  in mei_ace_remove()
532 	mutex_destroy(&ace->lock);  in mei_ace_remove()