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
45 /* size of camera status notification content */
65 /* identify camera sensor ownership */
73 	/* used to switch camera sensor to host */
76 	/* used to switch camera sensor to IVSC */
191 	hdr->type = ACE_CMD_SET;  in init_cmd_hdr()
192 	hdr->msg_tgt = ACE_DRV_MSG;  in init_cmd_hdr()
193 	hdr->init_block = ACE_CMD_INIT_BLOCK;  in init_cmd_hdr()
194 	hdr->final_block = ACE_CMD_FINAL_BLOCK;  in init_cmd_hdr()
200 	union ace_cmd_param *param = &cmd->param;  in construct_command()
201 	struct ace_cmd_hdr *hdr = &cmd->hdr;  in construct_command()
205 	hdr->cmd_id = cmd_id;  in construct_command()
208 		param->uuid = ACE_GET_FW_ID_UUID;  in construct_command()
209 		hdr->param_size = sizeof(param->uuid);  in construct_command()
212 		param->param = 0;  in construct_command()
213 		hdr->firmware_id = ace->firmware_id;  in construct_command()
214 		hdr->param_size = sizeof(param->param);  in construct_command()
217 		hdr->firmware_id = ace->firmware_id;  in construct_command()
220 		return -EINVAL;  in construct_command()
223 	return hdr->param_size + sizeof(cmd->hdr);  in construct_command()
230 	union ace_notif_hdr *resp_hdr = &ace->cmd_response.hdr;  in mei_ace_send()
231 	union ace_notif_hdr *ack_hdr = &ace->cmd_ack.hdr;  in mei_ace_send()
232 	struct ace_cmd_hdr *cmd_hdr = &cmd->hdr;  in mei_ace_send()
235 	mutex_lock(&ace->lock);  in mei_ace_send()
237 	reinit_completion(&ace->cmd_completion);  in mei_ace_send()
239 	ret = mei_cldev_send(ace->cldev, (u8 *)cmd, len);  in mei_ace_send()
243 	ret = wait_for_completion_killable_timeout(&ace->cmd_completion,  in mei_ace_send()
248 		ret = -ETIMEDOUT;  in mei_ace_send()
252 	if (ack_hdr->ack.cmd_id != cmd_hdr->cmd_id) {  in mei_ace_send()
253 		ret = -EINVAL;  in mei_ace_send()
258 	ret = ack_hdr->ack.status;  in mei_ace_send()
260 		ret = -EIO;  in mei_ace_send()
267 	ret = wait_for_completion_killable_timeout(&ace->cmd_completion,  in mei_ace_send()
272 		ret = -ETIMEDOUT;  in mei_ace_send()
278 	if (resp_hdr->response.cmd_id != cmd_hdr->cmd_id)  in mei_ace_send()
279 		ret = -EINVAL;  in mei_ace_send()
282 	mutex_unlock(&ace->lock);  in mei_ace_send()
328 	union ace_notif_hdr *hdr = &resp->hdr;  in handle_command_response()
330 	switch (hdr->response.cmd_id) {  in handle_command_response()
333 		memcpy(&ace->cmd_response, resp, len);  in handle_command_response()
334 		complete(&ace->cmd_completion);  in handle_command_response()
346 	union ace_notif_hdr *hdr = &ack->hdr;  in handle_command_ack()
348 	switch (hdr->ack.cmd_id) {  in handle_command_ack()
350 		ace->firmware_id = ack->cont.firmware_id;  in handle_command_ack()
354 		memcpy(&ace->cmd_ack, ack, len);  in handle_command_ack()
355 		complete(&ace->cmd_completion);  in handle_command_ack()
372 		dev_err(&cldev->dev, "recv error: %d\n", ret);  in mei_ace_rx()
376 	if (hdr->event.ack) {  in mei_ace_rx()
381 	switch (hdr->event.event_type) {  in mei_ace_rx()
390 		dev_dbg(&cldev->dev, "firmware ready\n");  in mei_ace_rx()
399 	struct device *dev = &ace->cldev->dev;  in mei_ace_setup_dev_link()
405 	snprintf(name, sizeof(name), "%s-%pUl", dev_name(dev->parent), &uuid);  in mei_ace_setup_dev_link()
407 	csi_dev = device_find_child_by_name(dev->parent, name);  in mei_ace_setup_dev_link()
409 		ret = -EPROBE_DEFER;  in mei_ace_setup_dev_link()
414 	ace->csi_link = device_link_add(csi_dev, dev, DL_FLAG_PM_RUNTIME |  in mei_ace_setup_dev_link()
416 	if (!ace->csi_link) {  in mei_ace_setup_dev_link()
417 		ret = -EINVAL;  in mei_ace_setup_dev_link()
422 	ace->csi_dev = csi_dev;  in mei_ace_setup_dev_link()
433 /* switch camera to host before probe sensor device */
442 	dev = &ace->cldev->dev;  in mei_ace_post_probe_work()
446 		dev_err(dev, "switch camera to host failed: %d\n", ret);  in mei_ace_post_probe_work()
450 	adev = ACPI_COMPANION(dev->parent);  in mei_ace_post_probe_work()
460 	struct device *dev = &cldev->dev;  in mei_ace_probe()
466 		return -ENOMEM;  in mei_ace_probe()
468 	ace->cldev = cldev;  in mei_ace_probe()
469 	mutex_init(&ace->lock);  in mei_ace_probe()
470 	init_completion(&ace->cmd_completion);  in mei_ace_probe()
471 	INIT_WORK(&ace->work, mei_ace_post_probe_work);  in mei_ace_probe()
500 	schedule_work(&ace->work);  in mei_ace_probe()
512 	mutex_destroy(&ace->lock);  in mei_ace_probe()
521 	cancel_work_sync(&ace->work);  in mei_ace_remove()
523 	device_link_del(ace->csi_link);  in mei_ace_remove()
524 	put_device(ace->csi_dev);  in mei_ace_remove()
526 	pm_runtime_disable(&cldev->dev);  in mei_ace_remove()
527 	pm_runtime_set_suspended(&cldev->dev);  in mei_ace_remove()
531 	mutex_destroy(&ace->lock);  in mei_ace_remove()