82 typedef int (*cros_ec_xfer_fn_t) (struct cros_ec_device *ec_dev,
98 	struct cros_ec_device *ec_dev;  member
117 static int terminate_request(struct cros_ec_device *ec_dev)  in terminate_request()  argument
119 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in terminate_request()
139 		dev_err(ec_dev->dev,  in terminate_request()
156 static int receive_n_bytes(struct cros_ec_device *ec_dev, u8 *buf, int n)  in receive_n_bytes()  argument
158 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in receive_n_bytes()
163 	if (buf - ec_dev->din + n > ec_dev->din_size)  in receive_n_bytes()
175 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in receive_n_bytes()
192 static int cros_ec_spi_receive_packet(struct cros_ec_device *ec_dev,  in cros_ec_spi_receive_packet()  argument
201 	if (ec_dev->din_size < EC_MSG_PREAMBLE_COUNT)  in cros_ec_spi_receive_packet()
209 		ret = receive_n_bytes(ec_dev,  in cros_ec_spi_receive_packet()
210 				      ec_dev->din,  in cros_ec_spi_receive_packet()
215 		ptr = ec_dev->din;  in cros_ec_spi_receive_packet()
218 				dev_dbg(ec_dev->dev, "msg found at %zd\n",  in cros_ec_spi_receive_packet()
219 					ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
232 			dev_warn(ec_dev->dev, "EC failed to respond in time\n");  in cros_ec_spi_receive_packet()
243 	memmove(ec_dev->din, ptr, todo);  in cros_ec_spi_receive_packet()
244 	ptr = ec_dev->din + todo;  in cros_ec_spi_receive_packet()
245 	dev_dbg(ec_dev->dev, "need %d, got %d bytes from preamble\n",  in cros_ec_spi_receive_packet()
251 		ret = receive_n_bytes(ec_dev, ptr, sizeof(*response) - todo);  in cros_ec_spi_receive_packet()
258 	response = (struct ec_host_response *)ec_dev->din;  in cros_ec_spi_receive_packet()
261 	if (response->data_len > ec_dev->din_size)  in cros_ec_spi_receive_packet()
273 		dev_dbg(ec_dev->dev, "loop, todo=%d, need_len=%d, ptr=%zd\n",  in cros_ec_spi_receive_packet()
274 			todo, need_len, ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
276 		ret = receive_n_bytes(ec_dev, ptr, todo);  in cros_ec_spi_receive_packet()
284 	dev_dbg(ec_dev->dev, "loop done, ptr=%zd\n", ptr - ec_dev->din);  in cros_ec_spi_receive_packet()
301 static int cros_ec_spi_receive_response(struct cros_ec_device *ec_dev,  in cros_ec_spi_receive_response()  argument
309 	if (ec_dev->din_size < EC_MSG_PREAMBLE_COUNT)  in cros_ec_spi_receive_response()
317 		ret = receive_n_bytes(ec_dev,  in cros_ec_spi_receive_response()
318 				      ec_dev->din,  in cros_ec_spi_receive_response()
323 		ptr = ec_dev->din;  in cros_ec_spi_receive_response()
326 				dev_dbg(ec_dev->dev, "msg found at %zd\n",  in cros_ec_spi_receive_response()
327 					ptr - ec_dev->din);  in cros_ec_spi_receive_response()
340 			dev_warn(ec_dev->dev, "EC failed to respond in time\n");  in cros_ec_spi_receive_response()
351 	memmove(ec_dev->din, ptr, todo);  in cros_ec_spi_receive_response()
352 	ptr = ec_dev->din + todo;  in cros_ec_spi_receive_response()
353 	dev_dbg(ec_dev->dev, "need %d, got %d bytes from preamble\n",  in cros_ec_spi_receive_response()
366 		dev_dbg(ec_dev->dev, "loop, todo=%d, need_len=%d, ptr=%zd\n",  in cros_ec_spi_receive_response()
367 			todo, need_len, ptr - ec_dev->din);  in cros_ec_spi_receive_response()
369 		ret = receive_n_bytes(ec_dev, ptr, todo);  in cros_ec_spi_receive_response()
373 		debug_packet(ec_dev->dev, "interim", ptr, todo);  in cros_ec_spi_receive_response()
378 	dev_dbg(ec_dev->dev, "loop done, ptr=%zd\n", ptr - ec_dev->din);  in cros_ec_spi_receive_response()
389 static int do_cros_ec_pkt_xfer_spi(struct cros_ec_device *ec_dev,  in do_cros_ec_pkt_xfer_spi()  argument
393 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in do_cros_ec_pkt_xfer_spi()
404 	len = cros_ec_prepare_tx(ec_dev, ec_msg);  in do_cros_ec_pkt_xfer_spi()
407 	dev_dbg(ec_dev->dev, "prepared, len=%d\n", len);  in do_cros_ec_pkt_xfer_spi()
434 	trans.tx_buf = ec_dev->dout;  in do_cros_ec_pkt_xfer_spi()
471 		ret = cros_ec_spi_receive_packet(ec_dev,  in do_cros_ec_pkt_xfer_spi()
474 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in do_cros_ec_pkt_xfer_spi()
476 	final_ret = terminate_request(ec_dev);  in do_cros_ec_pkt_xfer_spi()
485 	ptr = ec_dev->din;  in do_cros_ec_pkt_xfer_spi()
491 	ret = cros_ec_check_result(ec_dev, ec_msg);  in do_cros_ec_pkt_xfer_spi()
498 		dev_err(ec_dev->dev, "packet too long (%d bytes, expected %d)",  in do_cros_ec_pkt_xfer_spi()
513 		dev_err(ec_dev->dev,  in do_cros_ec_pkt_xfer_spi()
535 static int do_cros_ec_cmd_xfer_spi(struct cros_ec_device *ec_dev,  in do_cros_ec_cmd_xfer_spi()  argument
538 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in do_cros_ec_cmd_xfer_spi()
549 	len = cros_ec_prepare_tx(ec_dev, ec_msg);  in do_cros_ec_cmd_xfer_spi()
552 	dev_dbg(ec_dev->dev, "prepared, len=%d\n", len);  in do_cros_ec_cmd_xfer_spi()
566 	debug_packet(ec_dev->dev, "out", ec_dev->dout, len);  in do_cros_ec_cmd_xfer_spi()
568 	trans.tx_buf = ec_dev->dout;  in do_cros_ec_cmd_xfer_spi()
592 		ret = cros_ec_spi_receive_response(ec_dev,  in do_cros_ec_cmd_xfer_spi()
595 		dev_err(ec_dev->dev, "spi transfer failed: %d\n", ret);  in do_cros_ec_cmd_xfer_spi()
597 	final_ret = terminate_request(ec_dev);  in do_cros_ec_cmd_xfer_spi()
606 	ptr = ec_dev->din;  in do_cros_ec_cmd_xfer_spi()
610 	ret = cros_ec_check_result(ec_dev, ec_msg);  in do_cros_ec_cmd_xfer_spi()
617 		dev_err(ec_dev->dev, "packet too long (%d bytes, expected %d)",  in do_cros_ec_cmd_xfer_spi()
631 	debug_packet(ec_dev->dev, "in", ptr, len + 3);  in do_cros_ec_cmd_xfer_spi()
634 		dev_err(ec_dev->dev,  in do_cros_ec_cmd_xfer_spi()
655 	params->ret = params->fn(params->ec_dev, params->ec_msg);  in cros_ec_xfer_high_pri_work()
658 static int cros_ec_xfer_high_pri(struct cros_ec_device *ec_dev,  in cros_ec_xfer_high_pri()  argument
662 	struct cros_ec_spi *ec_spi = ec_dev->priv;  in cros_ec_xfer_high_pri()
666 		.ec_dev = ec_dev,  in cros_ec_xfer_high_pri()
686 static int cros_ec_pkt_xfer_spi(struct cros_ec_device *ec_dev,  in cros_ec_pkt_xfer_spi()  argument
689 	return cros_ec_xfer_high_pri(ec_dev, ec_msg, do_cros_ec_pkt_xfer_spi);  in cros_ec_pkt_xfer_spi()
692 static int cros_ec_cmd_xfer_spi(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer_spi()  argument
695 	return cros_ec_xfer_high_pri(ec_dev, ec_msg, do_cros_ec_cmd_xfer_spi);  in cros_ec_cmd_xfer_spi()
745 	struct cros_ec_device *ec_dev;  in cros_ec_spi_probe()  local
758 	ec_dev = devm_kzalloc(dev, sizeof(*ec_dev), GFP_KERNEL);  in cros_ec_spi_probe()
759 	if (!ec_dev)  in cros_ec_spi_probe()
765 	spi_set_drvdata(spi, ec_dev);  in cros_ec_spi_probe()
766 	ec_dev->dev = dev;  in cros_ec_spi_probe()
767 	ec_dev->priv = ec_spi;  in cros_ec_spi_probe()
768 	ec_dev->irq = spi->irq;  in cros_ec_spi_probe()
769 	ec_dev->cmd_xfer = cros_ec_cmd_xfer_spi;  in cros_ec_spi_probe()
770 	ec_dev->pkt_xfer = cros_ec_pkt_xfer_spi;  in cros_ec_spi_probe()
771 	ec_dev->phys_name = dev_name(&ec_spi->spi->dev);  in cros_ec_spi_probe()
772 	ec_dev->din_size = EC_MSG_PREAMBLE_COUNT +  in cros_ec_spi_probe()
775 	ec_dev->dout_size = sizeof(struct ec_host_request);  in cros_ec_spi_probe()
783 	err = cros_ec_register(ec_dev);  in cros_ec_spi_probe()
796 	struct cros_ec_device *ec_dev = spi_get_drvdata(spi);  in cros_ec_spi_remove()  local
798 	cros_ec_unregister(ec_dev);  in cros_ec_spi_remove()
804 	struct cros_ec_device *ec_dev = dev_get_drvdata(dev);  in cros_ec_spi_suspend()  local
806 	return cros_ec_suspend(ec_dev);  in cros_ec_spi_suspend()
811 	struct cros_ec_device *ec_dev = dev_get_drvdata(dev);  in cros_ec_spi_resume()  local
813 	return cros_ec_resume(ec_dev);  in cros_ec_spi_resume()