100 static int terminate_request(struct cros_ec_device *ec_dev)  in terminate_request()  argument
102 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in terminate_request()
121 		dev_err(ec_dev->dev,  in terminate_request()
134 static int receive_n_bytes(struct cros_ec_device *ec_dev, u8 *buf, int n)  in receive_n_bytes()  argument
136 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in receive_n_bytes()
141 	BUG_ON(buf - ec_dev->din + n > ec_dev->din_size);  in receive_n_bytes()
152 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in receive_n_bytes()
169 static int cros_ec_spi_receive_packet(struct cros_ec_device *ec_dev,  in cros_ec_spi_receive_packet()  argument
178 	BUG_ON(EC_MSG_PREAMBLE_COUNT > ec_dev->din_size);  in cros_ec_spi_receive_packet()
185 		ret = receive_n_bytes(ec_dev,  in cros_ec_spi_receive_packet()
186 				      ec_dev->din,  in cros_ec_spi_receive_packet()
191 		ptr = ec_dev->din;  in cros_ec_spi_receive_packet()
194 				dev_dbg(ec_dev->dev, "msg found at %zd\n",  in cros_ec_spi_receive_packet()
195 					ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
208 			dev_warn(ec_dev->dev, "EC failed to respond in time\n");  in cros_ec_spi_receive_packet()
218 	BUG_ON(todo < 0 || todo > ec_dev->din_size);  in cros_ec_spi_receive_packet()
220 	memmove(ec_dev->din, ptr, todo);  in cros_ec_spi_receive_packet()
221 	ptr = ec_dev->din + todo;  in cros_ec_spi_receive_packet()
222 	dev_dbg(ec_dev->dev, "need %d, got %d bytes from preamble\n",  in cros_ec_spi_receive_packet()
228 		ret = receive_n_bytes(ec_dev, ptr, sizeof(*response) - todo);  in cros_ec_spi_receive_packet()
235 	response = (struct ec_host_response *)ec_dev->din;  in cros_ec_spi_receive_packet()
238 	if (response->data_len > ec_dev->din_size)  in cros_ec_spi_receive_packet()
250 		dev_dbg(ec_dev->dev, "loop, todo=%d, need_len=%d, ptr=%zd\n",  in cros_ec_spi_receive_packet()
251 			todo, need_len, ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
253 		ret = receive_n_bytes(ec_dev, ptr, todo);  in cros_ec_spi_receive_packet()
261 	dev_dbg(ec_dev->dev, "loop done, ptr=%zd\n", ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
278 static int cros_ec_spi_receive_response(struct cros_ec_device *ec_dev,  in cros_ec_spi_receive_response()  argument
286 	BUG_ON(EC_MSG_PREAMBLE_COUNT > ec_dev->din_size);  in cros_ec_spi_receive_response()
293 		ret = receive_n_bytes(ec_dev,  in cros_ec_spi_receive_response()
294 				      ec_dev->din,  in cros_ec_spi_receive_response()
299 		ptr = ec_dev->din;  in cros_ec_spi_receive_response()
302 				dev_dbg(ec_dev->dev, "msg found at %zd\n",  in cros_ec_spi_receive_response()
303 					ptr - ec_dev->din);  in cros_ec_spi_receive_response()
316 			dev_warn(ec_dev->dev, "EC failed to respond in time\n");  in cros_ec_spi_receive_response()
326 	BUG_ON(todo < 0 || todo > ec_dev->din_size);  in cros_ec_spi_receive_response()
328 	memmove(ec_dev->din, ptr, todo);  in cros_ec_spi_receive_response()
329 	ptr = ec_dev->din + todo;  in cros_ec_spi_receive_response()
330 	dev_dbg(ec_dev->dev, "need %d, got %d bytes from preamble\n",  in cros_ec_spi_receive_response()
343 		dev_dbg(ec_dev->dev, "loop, todo=%d, need_len=%d, ptr=%zd\n",  in cros_ec_spi_receive_response()
344 			todo, need_len, ptr - ec_dev->din);  in cros_ec_spi_receive_response()
346 		ret = receive_n_bytes(ec_dev, ptr, todo);  in cros_ec_spi_receive_response()
350 		debug_packet(ec_dev->dev, "interim", ptr, todo);  in cros_ec_spi_receive_response()
355 	dev_dbg(ec_dev->dev, "loop done, ptr=%zd\n", ptr - ec_dev->din);  in cros_ec_spi_receive_response()
366 static int cros_ec_pkt_xfer_spi(struct cros_ec_device *ec_dev,  in cros_ec_pkt_xfer_spi()  argument
371 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in cros_ec_pkt_xfer_spi()
380 	len = cros_ec_prepare_tx(ec_dev, ec_msg);  in cros_ec_pkt_xfer_spi()
381 	request = (struct ec_host_request *)ec_dev->dout;  in cros_ec_pkt_xfer_spi()
382 	dev_dbg(ec_dev->dev, "prepared, len=%d\n", len);  in cros_ec_pkt_xfer_spi()
412 	trans.tx_buf = ec_dev->dout;  in cros_ec_pkt_xfer_spi()
436 			ret = cros_ec_spi_receive_packet(ec_dev,  in cros_ec_pkt_xfer_spi()
439 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in cros_ec_pkt_xfer_spi()
442 	final_ret = terminate_request(ec_dev);  in cros_ec_pkt_xfer_spi()
448 	ptr = ec_dev->din;  in cros_ec_pkt_xfer_spi()
454 	ret = cros_ec_check_result(ec_dev, ec_msg);  in cros_ec_pkt_xfer_spi()
461 		dev_err(ec_dev->dev, "packet too long (%d bytes, expected %d)",  in cros_ec_pkt_xfer_spi()
476 		dev_err(ec_dev->dev,  in cros_ec_pkt_xfer_spi()
498 static int cros_ec_cmd_xfer_spi(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer_spi()  argument
501 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in cros_ec_cmd_xfer_spi()
510 	len = cros_ec_prepare_tx(ec_dev, ec_msg);  in cros_ec_cmd_xfer_spi()
511 	dev_dbg(ec_dev->dev, "prepared, len=%d\n", len);  in cros_ec_cmd_xfer_spi()
529 	debug_packet(ec_dev->dev, "out", ec_dev->dout, len);  in cros_ec_cmd_xfer_spi()
531 	trans.tx_buf = ec_dev->dout;  in cros_ec_cmd_xfer_spi()
556 			ret = cros_ec_spi_receive_response(ec_dev,  in cros_ec_cmd_xfer_spi()
559 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in cros_ec_cmd_xfer_spi()
562 	final_ret = terminate_request(ec_dev);  in cros_ec_cmd_xfer_spi()
568 	ptr = ec_dev->din;  in cros_ec_cmd_xfer_spi()
572 	ret = cros_ec_check_result(ec_dev, ec_msg);  in cros_ec_cmd_xfer_spi()
579 		dev_err(ec_dev->dev, "packet too long (%d bytes, expected %d)",  in cros_ec_cmd_xfer_spi()
593 	debug_packet(ec_dev->dev, "in", ptr, len + 3);  in cros_ec_cmd_xfer_spi()
596 		dev_err(ec_dev->dev,  in cros_ec_cmd_xfer_spi()
630 	struct cros_ec_device *ec_dev;  in cros_ec_spi_probe()  local
644 	ec_dev = devm_kzalloc(dev, sizeof(*ec_dev), GFP_KERNEL);  in cros_ec_spi_probe()
645 	if (!ec_dev)  in cros_ec_spi_probe()
651 	spi_set_drvdata(spi, ec_dev);  in cros_ec_spi_probe()
652 	ec_dev->dev = dev;  in cros_ec_spi_probe()
653 	ec_dev->priv = ec_spi;  in cros_ec_spi_probe()
654 	ec_dev->irq = spi->irq;  in cros_ec_spi_probe()
655 	ec_dev->cmd_xfer = cros_ec_cmd_xfer_spi;  in cros_ec_spi_probe()
656 	ec_dev->pkt_xfer = cros_ec_pkt_xfer_spi;  in cros_ec_spi_probe()
657 	ec_dev->phys_name = dev_name(&ec_spi->spi->dev);  in cros_ec_spi_probe()
658 	ec_dev->din_size = EC_MSG_PREAMBLE_COUNT +  in cros_ec_spi_probe()
661 	ec_dev->dout_size = sizeof(struct ec_host_request);  in cros_ec_spi_probe()
664 	err = cros_ec_register(ec_dev);  in cros_ec_spi_probe()
677 	struct cros_ec_device *ec_dev;  in cros_ec_spi_remove()  local
679 	ec_dev = spi_get_drvdata(spi);  in cros_ec_spi_remove()
680 	cros_ec_remove(ec_dev);  in cros_ec_spi_remove()
688 	struct cros_ec_device *ec_dev = dev_get_drvdata(dev);  in cros_ec_spi_suspend()  local
690 	return cros_ec_suspend(ec_dev);  in cros_ec_spi_suspend()
695 	struct cros_ec_device *ec_dev = dev_get_drvdata(dev);  in cros_ec_spi_resume()  local
697 	return cros_ec_resume(ec_dev);  in cros_ec_spi_resume()