102 static int terminate_request(struct cros_ec_device *ec_dev)  in terminate_request()  argument
104 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in terminate_request()
123 		dev_err(ec_dev->dev,  in terminate_request()
136 static int receive_n_bytes(struct cros_ec_device *ec_dev, u8 *buf, int n)  in receive_n_bytes()  argument
138 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in receive_n_bytes()
143 	BUG_ON(buf - ec_dev->din + n > ec_dev->din_size);  in receive_n_bytes()
154 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in receive_n_bytes()
171 static int cros_ec_spi_receive_packet(struct cros_ec_device *ec_dev,  in cros_ec_spi_receive_packet()  argument
180 	BUG_ON(ec_dev->din_size < EC_MSG_PREAMBLE_COUNT);  in cros_ec_spi_receive_packet()
187 		ret = receive_n_bytes(ec_dev,  in cros_ec_spi_receive_packet()
188 				      ec_dev->din,  in cros_ec_spi_receive_packet()
193 		ptr = ec_dev->din;  in cros_ec_spi_receive_packet()
196 				dev_dbg(ec_dev->dev, "msg found at %zd\n",  in cros_ec_spi_receive_packet()
197 					ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
210 			dev_warn(ec_dev->dev, "EC failed to respond in time\n");  in cros_ec_spi_receive_packet()
220 	BUG_ON(todo < 0 || todo > ec_dev->din_size);  in cros_ec_spi_receive_packet()
222 	memmove(ec_dev->din, ptr, todo);  in cros_ec_spi_receive_packet()
223 	ptr = ec_dev->din + todo;  in cros_ec_spi_receive_packet()
224 	dev_dbg(ec_dev->dev, "need %d, got %d bytes from preamble\n",  in cros_ec_spi_receive_packet()
230 		ret = receive_n_bytes(ec_dev, ptr, sizeof(*response) - todo);  in cros_ec_spi_receive_packet()
237 	response = (struct ec_host_response *)ec_dev->din;  in cros_ec_spi_receive_packet()
240 	if (response->data_len > ec_dev->din_size)  in cros_ec_spi_receive_packet()
252 		dev_dbg(ec_dev->dev, "loop, todo=%d, need_len=%d, ptr=%zd\n",  in cros_ec_spi_receive_packet()
253 			todo, need_len, ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
255 		ret = receive_n_bytes(ec_dev, ptr, todo);  in cros_ec_spi_receive_packet()
263 	dev_dbg(ec_dev->dev, "loop done, ptr=%zd\n", ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
280 static int cros_ec_spi_receive_response(struct cros_ec_device *ec_dev,  in cros_ec_spi_receive_response()  argument
288 	BUG_ON(ec_dev->din_size < EC_MSG_PREAMBLE_COUNT);  in cros_ec_spi_receive_response()
295 		ret = receive_n_bytes(ec_dev,  in cros_ec_spi_receive_response()
296 				      ec_dev->din,  in cros_ec_spi_receive_response()
301 		ptr = ec_dev->din;  in cros_ec_spi_receive_response()
304 				dev_dbg(ec_dev->dev, "msg found at %zd\n",  in cros_ec_spi_receive_response()
305 					ptr - ec_dev->din);  in cros_ec_spi_receive_response()
318 			dev_warn(ec_dev->dev, "EC failed to respond in time\n");  in cros_ec_spi_receive_response()
328 	BUG_ON(todo < 0 || todo > ec_dev->din_size);  in cros_ec_spi_receive_response()
330 	memmove(ec_dev->din, ptr, todo);  in cros_ec_spi_receive_response()
331 	ptr = ec_dev->din + todo;  in cros_ec_spi_receive_response()
332 	dev_dbg(ec_dev->dev, "need %d, got %d bytes from preamble\n",  in cros_ec_spi_receive_response()
345 		dev_dbg(ec_dev->dev, "loop, todo=%d, need_len=%d, ptr=%zd\n",  in cros_ec_spi_receive_response()
346 			todo, need_len, ptr - ec_dev->din);  in cros_ec_spi_receive_response()
348 		ret = receive_n_bytes(ec_dev, ptr, todo);  in cros_ec_spi_receive_response()
352 		debug_packet(ec_dev->dev, "interim", ptr, todo);  in cros_ec_spi_receive_response()
357 	dev_dbg(ec_dev->dev, "loop done, ptr=%zd\n", ptr - ec_dev->din);  in cros_ec_spi_receive_response()
368 static int cros_ec_pkt_xfer_spi(struct cros_ec_device *ec_dev,  in cros_ec_pkt_xfer_spi()  argument
372 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in cros_ec_pkt_xfer_spi()
383 	len = cros_ec_prepare_tx(ec_dev, ec_msg);  in cros_ec_pkt_xfer_spi()
384 	dev_dbg(ec_dev->dev, "prepared, len=%d\n", len);  in cros_ec_pkt_xfer_spi()
410 	trans.tx_buf = ec_dev->dout;  in cros_ec_pkt_xfer_spi()
447 		ret = cros_ec_spi_receive_packet(ec_dev,  in cros_ec_pkt_xfer_spi()
450 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in cros_ec_pkt_xfer_spi()
452 	final_ret = terminate_request(ec_dev);  in cros_ec_pkt_xfer_spi()
461 	ptr = ec_dev->din;  in cros_ec_pkt_xfer_spi()
467 	ret = cros_ec_check_result(ec_dev, ec_msg);  in cros_ec_pkt_xfer_spi()
474 		dev_err(ec_dev->dev, "packet too long (%d bytes, expected %d)",  in cros_ec_pkt_xfer_spi()
489 		dev_err(ec_dev->dev,  in cros_ec_pkt_xfer_spi()
511 static int cros_ec_cmd_xfer_spi(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer_spi()  argument
514 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in cros_ec_cmd_xfer_spi()
525 	len = cros_ec_prepare_tx(ec_dev, ec_msg);  in cros_ec_cmd_xfer_spi()
526 	dev_dbg(ec_dev->dev, "prepared, len=%d\n", len);  in cros_ec_cmd_xfer_spi()
540 	debug_packet(ec_dev->dev, "out", ec_dev->dout, len);  in cros_ec_cmd_xfer_spi()
542 	trans.tx_buf = ec_dev->dout;  in cros_ec_cmd_xfer_spi()
566 		ret = cros_ec_spi_receive_response(ec_dev,  in cros_ec_cmd_xfer_spi()
569 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in cros_ec_cmd_xfer_spi()
571 	final_ret = terminate_request(ec_dev);  in cros_ec_cmd_xfer_spi()
580 	ptr = ec_dev->din;  in cros_ec_cmd_xfer_spi()
584 	ret = cros_ec_check_result(ec_dev, ec_msg);  in cros_ec_cmd_xfer_spi()
591 		dev_err(ec_dev->dev, "packet too long (%d bytes, expected %d)",  in cros_ec_cmd_xfer_spi()
605 	debug_packet(ec_dev->dev, "in", ptr, len + 3);  in cros_ec_cmd_xfer_spi()
608 		dev_err(ec_dev->dev,  in cros_ec_cmd_xfer_spi()
642 	struct cros_ec_device *ec_dev;  in cros_ec_spi_probe()  local
656 	ec_dev = devm_kzalloc(dev, sizeof(*ec_dev), GFP_KERNEL);  in cros_ec_spi_probe()
657 	if (!ec_dev)  in cros_ec_spi_probe()
663 	spi_set_drvdata(spi, ec_dev);  in cros_ec_spi_probe()
664 	ec_dev->dev = dev;  in cros_ec_spi_probe()
665 	ec_dev->priv = ec_spi;  in cros_ec_spi_probe()
666 	ec_dev->irq = spi->irq;  in cros_ec_spi_probe()
667 	ec_dev->cmd_xfer = cros_ec_cmd_xfer_spi;  in cros_ec_spi_probe()
668 	ec_dev->pkt_xfer = cros_ec_pkt_xfer_spi;  in cros_ec_spi_probe()
669 	ec_dev->phys_name = dev_name(&ec_spi->spi->dev);  in cros_ec_spi_probe()
670 	ec_dev->din_size = EC_MSG_PREAMBLE_COUNT +  in cros_ec_spi_probe()
673 	ec_dev->dout_size = sizeof(struct ec_host_request);  in cros_ec_spi_probe()
677 	err = cros_ec_register(ec_dev);  in cros_ec_spi_probe()
690 	struct cros_ec_device *ec_dev;  in cros_ec_spi_remove()  local
692 	ec_dev = spi_get_drvdata(spi);  in cros_ec_spi_remove()
693 	cros_ec_remove(ec_dev);  in cros_ec_spi_remove()
701 	struct cros_ec_device *ec_dev = dev_get_drvdata(dev);  in cros_ec_spi_suspend()  local
703 	return cros_ec_suspend(ec_dev);  in cros_ec_spi_suspend()
708 	struct cros_ec_device *ec_dev = dev_get_drvdata(dev);  in cros_ec_spi_resume()  local
710 	return cros_ec_resume(ec_dev);  in cros_ec_spi_resume()