1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/rpmsg.h>
27  * struct wcnss_ctrl - driver context
29  * @channel:	SMD channel handle
37 	struct rpmsg_endpoint *channel;  member
64  * struct wcnss_msg_hdr - common packet header for requests and responses
74  * struct wcnss_version_resp - version request response
85  * struct wcnss_download_nv_req - firmware fragment request
101  * struct wcnss_download_nv_resp - firmware download response
111  * wcnss_ctrl_smd_callback() - handler from SMD responses
126 	struct wcnss_ctrl *wcnss = dev_get_drvdata(&rpdev->dev);  in wcnss_ctrl_smd_callback()
131 	switch (hdr->type) {  in wcnss_ctrl_smd_callback()
134 			dev_err(wcnss->dev,  in wcnss_ctrl_smd_callback()
140 		dev_info(wcnss->dev, "WCNSS Version %d.%d %d.%d\n",  in wcnss_ctrl_smd_callback()
141 			 version->major, version->minor,  in wcnss_ctrl_smd_callback()
142 			 version->version, version->revision);  in wcnss_ctrl_smd_callback()
144 		complete(&wcnss->ack);  in wcnss_ctrl_smd_callback()
148 			dev_err(wcnss->dev,  in wcnss_ctrl_smd_callback()
154 		wcnss->ack_status = nvresp->status;  in wcnss_ctrl_smd_callback()
155 		complete(&wcnss->ack);  in wcnss_ctrl_smd_callback()
158 		dev_dbg(wcnss->dev, "cold boot complete\n");  in wcnss_ctrl_smd_callback()
159 		complete(&wcnss->cbc);  in wcnss_ctrl_smd_callback()
162 		dev_info(wcnss->dev, "unknown message type %d\n", hdr->type);  in wcnss_ctrl_smd_callback()
170  * wcnss_request_version() - send a version request to WCNSS
180 	ret = rpmsg_send(wcnss->channel, &msg, sizeof(msg));  in wcnss_request_version()
184 	ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_CBC_TIMEOUT);  in wcnss_request_version()
186 		dev_err(wcnss->dev, "timeout waiting for version response\n");  in wcnss_request_version()
187 		return -ETIMEDOUT;  in wcnss_request_version()
194  * wcnss_download_nv() - send nv binary to WCNSS
203 	struct device *dev = wcnss->dev;  in wcnss_download_nv()
212 		return -ENOMEM;  in wcnss_download_nv()
214 	ret = of_property_read_string(dev->of_node, "firmware-name", &nvbin);  in wcnss_download_nv()
215 	if (ret < 0 && ret != -EINVAL)  in wcnss_download_nv()
224 	data = fw->data;  in wcnss_download_nv()
225 	left = fw->size;  in wcnss_download_nv()
227 	req->hdr.type = WCNSS_DOWNLOAD_NV_REQ;  in wcnss_download_nv()
228 	req->hdr.len = sizeof(*req) + NV_FRAGMENT_SIZE;  in wcnss_download_nv()
230 	req->last = 0;  in wcnss_download_nv()
231 	req->frag_size = NV_FRAGMENT_SIZE;  in wcnss_download_nv()
233 	req->seq = 0;  in wcnss_download_nv()
236 			req->last = 1;  in wcnss_download_nv()
237 			req->frag_size = left;  in wcnss_download_nv()
238 			req->hdr.len = sizeof(*req) + left;  in wcnss_download_nv()
241 		memcpy(req->fragment, data, req->frag_size);  in wcnss_download_nv()
243 		ret = rpmsg_send(wcnss->channel, req, req->hdr.len);  in wcnss_download_nv()
250 		req->seq++;  in wcnss_download_nv()
253 		left -= NV_FRAGMENT_SIZE;  in wcnss_download_nv()
256 	ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_REQUEST_TIMEOUT);  in wcnss_download_nv()
259 		ret = -ETIMEDOUT;  in wcnss_download_nv()
261 		*expect_cbc = wcnss->ack_status == WCNSS_ACK_COLD_BOOTING;  in wcnss_download_nv()
272  * qcom_wcnss_open_channel() - open additional SMD channel to WCNSS
274  * @name:	SMD channel name
275  * @cb:		callback to handle incoming data on the channel
276  * @priv:	private data for use in the call-back
278 struct rpmsg_endpoint *qcom_wcnss_open_channel(void *wcnss, const char *name, rpmsg_rx_cb_t cb, voi…  in qcom_wcnss_open_channel()  argument
283 	strscpy(chinfo.name, name, sizeof(chinfo.name));  in qcom_wcnss_open_channel()
287 	return rpmsg_create_ept(_wcnss->channel->rpdev, cb, priv, chinfo);  in qcom_wcnss_open_channel()
307 		ret = wait_for_completion_timeout(&wcnss->cbc, WCNSS_REQUEST_TIMEOUT);  in wcnss_async_probe()
309 			dev_err(wcnss->dev, "expected cold boot completion\n");  in wcnss_async_probe()
312 	of_platform_populate(wcnss->dev->of_node, NULL, NULL, wcnss->dev);  in wcnss_async_probe()
319 	wcnss = devm_kzalloc(&rpdev->dev, sizeof(*wcnss), GFP_KERNEL);  in wcnss_ctrl_probe()
321 		return -ENOMEM;  in wcnss_ctrl_probe()
323 	wcnss->dev = &rpdev->dev;  in wcnss_ctrl_probe()
324 	wcnss->channel = rpdev->ept;  in wcnss_ctrl_probe()
326 	init_completion(&wcnss->ack);  in wcnss_ctrl_probe()
327 	init_completion(&wcnss->cbc);  in wcnss_ctrl_probe()
328 	INIT_WORK(&wcnss->probe_work, wcnss_async_probe);  in wcnss_ctrl_probe()
330 	dev_set_drvdata(&rpdev->dev, wcnss);  in wcnss_ctrl_probe()
332 	schedule_work(&wcnss->probe_work);  in wcnss_ctrl_probe()
339 	struct wcnss_ctrl *wcnss = dev_get_drvdata(&rpdev->dev);  in wcnss_ctrl_remove()
341 	cancel_work_sync(&wcnss->probe_work);  in wcnss_ctrl_remove()
342 	of_platform_depopulate(&rpdev->dev);  in wcnss_ctrl_remove()
356 		.name  = "qcom_wcnss_ctrl",