3  * HSI core.
9 #include <linux/hsi/hsi.h>
23 	return sprintf(buf, "hsi:%s\n", dev_name(dev));  in modalias_show()
35 	add_uevent_var(env, "MODALIAS=hsi:%s", dev_name(dev));  in hsi_bus_uevent()
52 	.name		= "hsi",
103 		pr_err("hsi: failed to register client: %s\n", info->name);  in hsi_new_client()
118 static void hsi_scan_board_info(struct hsi_controller *hsi)  in hsi_scan_board_info()  argument
124 		if (cl_info->info.hsi_id == hsi->id) {  in hsi_scan_board_info()
125 			p = hsi_find_port_num(hsi, cl_info->info.port);  in hsi_scan_board_info()
214 	err = hsi_of_property_parse_mode(client, "hsi-mode", &mode);  in hsi_add_client_from_dt()
216 		err = hsi_of_property_parse_mode(client, "hsi-rx-mode",  in hsi_add_client_from_dt()
221 		err = hsi_of_property_parse_mode(client, "hsi-tx-mode",  in hsi_add_client_from_dt()
230 	err = of_property_read_u32(client, "hsi-speed-kbps",  in hsi_add_client_from_dt()
236 	err = hsi_of_property_parse_flow(client, "hsi-flow",  in hsi_add_client_from_dt()
241 	err = hsi_of_property_parse_arb_mode(client, "hsi-arb-mode",  in hsi_add_client_from_dt()
246 	prop = of_find_property(client, "hsi-channel-ids", &length);  in hsi_add_client_from_dt()
270 		err = of_property_read_u32_index(client, "hsi-channel-ids", i,  in hsi_add_client_from_dt()
275 		err = of_property_read_string_index(client, "hsi-channel-names",  in hsi_add_client_from_dt()
297 		pr_err("hsi: failed to register client: %s\n", name);  in hsi_add_client_from_dt()
309 	pr_err("hsi client: missing or incorrect of property: err=%d\n", err);  in hsi_add_client_from_dt()
316 	/* register hsi-char device */  in hsi_add_clients_from_dt()
343 	struct hsi_controller *hsi = to_hsi_controller(dev);  in hsi_controller_release()  local
345 	kfree(hsi->port);  in hsi_controller_release()
346 	kfree(hsi);  in hsi_controller_release()
355  * hsi_port_unregister_clients - Unregister an HSI port
356  * @port: The HSI port to unregister
365  * hsi_unregister_controller - Unregister an HSI controller
366  * @hsi: The HSI controller to register
368 void hsi_unregister_controller(struct hsi_controller *hsi)  in hsi_unregister_controller()  argument
370 	device_for_each_child(&hsi->device, NULL, hsi_remove_port);  in hsi_unregister_controller()
371 	device_unregister(&hsi->device);  in hsi_unregister_controller()
376  * hsi_register_controller - Register an HSI controller and its ports
377  * @hsi: The HSI controller to register
381 int hsi_register_controller(struct hsi_controller *hsi)  in hsi_register_controller()  argument
386 	err = device_add(&hsi->device);  in hsi_register_controller()
389 	for (i = 0; i < hsi->num_ports; i++) {  in hsi_register_controller()
390 		hsi->port[i]->device.parent = &hsi->device;  in hsi_register_controller()
391 		err = device_add(&hsi->port[i]->device);  in hsi_register_controller()
395 	/* Populate HSI bus with HSI clients */  in hsi_register_controller()
396 	hsi_scan_board_info(hsi);  in hsi_register_controller()
401 		device_del(&hsi->port[i]->device);  in hsi_register_controller()
402 	device_del(&hsi->device);  in hsi_register_controller()
409  * hsi_register_client_driver - Register an HSI client to the HSI bus
410  * @drv: HSI client driver to register
433  * hsi_put_controller - Free an HSI controller
435  * @hsi: Pointer to the HSI controller to freed
437  * HSI controller drivers should only use this function if they need
441 void hsi_put_controller(struct hsi_controller *hsi)  in hsi_put_controller()  argument
445 	if (!hsi)  in hsi_put_controller()
448 	for (i = 0; i < hsi->num_ports; i++)  in hsi_put_controller()
449 		if (hsi->port && hsi->port[i])  in hsi_put_controller()
450 			put_device(&hsi->port[i]->device);  in hsi_put_controller()
451 	put_device(&hsi->device);  in hsi_put_controller()
456  * hsi_alloc_controller - Allocate an HSI controller and its ports
457  * @n_ports: Number of ports on the HSI controller
464 	struct hsi_controller	*hsi;  in hsi_alloc_controller()  local
471 	hsi = kzalloc(sizeof(*hsi), flags);  in hsi_alloc_controller()
472 	if (!hsi)  in hsi_alloc_controller()
476 		kfree(hsi);  in hsi_alloc_controller()
479 	hsi->num_ports = n_ports;  in hsi_alloc_controller()
480 	hsi->port = port;  in hsi_alloc_controller()
481 	hsi->device.release = hsi_controller_release;  in hsi_alloc_controller()
482 	device_initialize(&hsi->device);  in hsi_alloc_controller()
498 		hsi->port[i]->device.release = hsi_port_release;  in hsi_alloc_controller()
499 		device_initialize(&hsi->port[i]->device);  in hsi_alloc_controller()
502 	return hsi;  in hsi_alloc_controller()
504 	hsi_put_controller(hsi);  in hsi_alloc_controller()
511  * hsi_free_msg - Free an HSI message
512  * @msg: Pointer to the HSI message
526  * hsi_alloc_msg - Allocate an HSI message
531  * In that case, HSI drivers will call the complete callback when
559  * hsi_async - Submit an HSI transfer to the controller
560  * @cl: HSI client sending the transfer
561  * @msg: The HSI transfer passed to controller
563  * The HSI message must have the channel, ttype, complete and destructor
567  * HSI controllers relay on pre-allocated buffers from their clients and they
570  * Once the HSI message transfer finishes, the HSI controller calls the
571  * complete callback with the status and actual_len fields of the HSI message
592  * hsi_claim_port - Claim the HSI client's port
593  * @cl: HSI client that wants to claim its port
623  * hsi_release_port - Release the HSI client's port
624  * @cl: HSI client which previously claimed its port
656  * @cl: HSI client that wants to receive port events
684  * @cl: HSI client that wants to stop receiving port events
712  * to a race condition in HSI HW protocol, clients need to be notified
729  * @cl: HSI client, which uses the channel
732  * Clients can call this function to get the hsi channel ids similar to
766 MODULE_DESCRIPTION("High-speed Synchronous Serial Interface (HSI) framework");