3  * FSI hub master driver
14 #include "fsi-master.h"
21  * FSI hub master support
23  * A hub master increases the number of potential target devices that the
24  * primary FSI master can access. For each link a primary master supports,
25  * each of those links can in turn be chained to a hub master with multiple
37 	struct fsi_master	master;  member
40 						/* master address space */
43 #define to_fsi_master_hub(m) container_of(m, struct fsi_master_hub, master)
45 static int hub_master_read(struct fsi_master *master, int link,  in hub_master_read()  argument
48 	struct fsi_master_hub *hub = to_fsi_master_hub(master);  in hub_master_read()
57 static int hub_master_write(struct fsi_master *master, int link,  in hub_master_write()  argument
60 	struct fsi_master_hub *hub = to_fsi_master_hub(master);  in hub_master_write()
69 static int hub_master_break(struct fsi_master *master, int link)  in hub_master_break()  argument
77 	return hub_master_write(master, link, 0, addr, &cmd, sizeof(cmd));  in hub_master_break()
80 static int hub_master_link_enable(struct fsi_master *master, int link,  in hub_master_link_enable()  argument
83 	struct fsi_master_hub *hub = to_fsi_master_hub(master);  in hub_master_link_enable()
136 	/* Initialize the MFSI (hub master) engine */  in hub_master_init()
165 	/* Leave enabled long enough for master logic to set up */  in hub_master_init()
185 	/* Reset the master bridge */  in hub_master_init()
228 	hub->master.dev.parent = dev;  in hub_master_probe()
229 	hub->master.dev.release = hub_master_release;  in hub_master_probe()
230 	hub->master.dev.of_node = of_node_get(dev_of_node(dev));  in hub_master_probe()
232 	hub->master.n_links = links;  in hub_master_probe()
233 	hub->master.read = hub_master_read;  in hub_master_probe()
234 	hub->master.write = hub_master_write;  in hub_master_probe()
235 	hub->master.send_break = hub_master_break;  in hub_master_probe()
236 	hub->master.link_enable = hub_master_link_enable;  in hub_master_probe()
242 	rc = fsi_master_register(&hub->master);  in hub_master_probe()
247 	 * and holds the sole reference on master.dev. This means the device  in hub_master_probe()
253 	get_device(&hub->master.dev);  in hub_master_probe()
266 	fsi_master_unregister(&hub->master);  in hub_master_remove()
268 	of_node_put(hub->master.dev.of_node);  in hub_master_remove()
271 	 * master.dev will likely be ->release()ed after this, which free()s  in hub_master_remove()
274 	put_device(&hub->master.dev);  in hub_master_remove()
290 		.name = "fsi-master-hub",
298 MODULE_DESCRIPTION("FSI hub master driver");