3  * HD-audio core bus driver
23  * snd_hdac_bus_init - initialize a HD-audio bas bus
24  * @bus: the pointer to bus object
25  * @ops: bus verb operators
29 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,  in snd_hdac_bus_init()  argument
32 	memset(bus, 0, sizeof(*bus));  in snd_hdac_bus_init()
33 	bus->dev = dev;  in snd_hdac_bus_init()
35 		bus->ops = ops;  in snd_hdac_bus_init()
37 		bus->ops = &default_ops;  in snd_hdac_bus_init()
38 	bus->dma_type = SNDRV_DMA_TYPE_DEV;  in snd_hdac_bus_init()
39 	INIT_LIST_HEAD(&bus->stream_list);  in snd_hdac_bus_init()
40 	INIT_LIST_HEAD(&bus->codec_list);  in snd_hdac_bus_init()
41 	INIT_WORK(&bus->unsol_work, snd_hdac_bus_process_unsol_events);  in snd_hdac_bus_init()
42 	spin_lock_init(&bus->reg_lock);  in snd_hdac_bus_init()
43 	mutex_init(&bus->cmd_mutex);  in snd_hdac_bus_init()
44 	mutex_init(&bus->lock);  in snd_hdac_bus_init()
45 	INIT_LIST_HEAD(&bus->hlink_list);  in snd_hdac_bus_init()
46 	bus->irq = -1;  in snd_hdac_bus_init()
52  * snd_hdac_bus_exit - clean up a HD-audio bas bus
53  * @bus: the pointer to bus object
55 void snd_hdac_bus_exit(struct hdac_bus *bus)  in snd_hdac_bus_exit()  argument
57 	WARN_ON(!list_empty(&bus->stream_list));  in snd_hdac_bus_exit()
58 	WARN_ON(!list_empty(&bus->codec_list));  in snd_hdac_bus_exit()
59 	cancel_work_sync(&bus->unsol_work);  in snd_hdac_bus_exit()
64  * snd_hdac_bus_exec_verb - execute a HD-audio verb on the given bus
65  * @bus: bus object
71 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,  in snd_hdac_bus_exec_verb()  argument
76 	mutex_lock(&bus->cmd_mutex);  in snd_hdac_bus_exec_verb()
77 	err = snd_hdac_bus_exec_verb_unlocked(bus, addr, cmd, res);  in snd_hdac_bus_exec_verb()
78 	mutex_unlock(&bus->cmd_mutex);  in snd_hdac_bus_exec_verb()
85  * @bus: bus object
91 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,  in snd_hdac_bus_exec_verb_unlocked()  argument
102 	else if (bus->sync_write)  in snd_hdac_bus_exec_verb_unlocked()
105 		trace_hda_send_cmd(bus, cmd);  in snd_hdac_bus_exec_verb_unlocked()
106 		err = bus->ops->command(bus, cmd);  in snd_hdac_bus_exec_verb_unlocked()
110 		err = bus->ops->get_response(bus, addr, &tmp);  in snd_hdac_bus_exec_verb_unlocked()
115 		err = bus->ops->get_response(bus, addr, res);  in snd_hdac_bus_exec_verb_unlocked()
116 		trace_hda_get_response(bus, addr, *res);  in snd_hdac_bus_exec_verb_unlocked()
124  * @bus: the BUS
132 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex)  in snd_hdac_bus_queue_event()  argument
136 	if (!bus)  in snd_hdac_bus_queue_event()
139 	trace_hda_unsol_event(bus, res, res_ex);  in snd_hdac_bus_queue_event()
140 	wp = (bus->unsol_wp + 1) % HDA_UNSOL_QUEUE_SIZE;  in snd_hdac_bus_queue_event()
141 	bus->unsol_wp = wp;  in snd_hdac_bus_queue_event()
144 	bus->unsol_queue[wp] = res;  in snd_hdac_bus_queue_event()
145 	bus->unsol_queue[wp + 1] = res_ex;  in snd_hdac_bus_queue_event()
147 	schedule_work(&bus->unsol_work);  in snd_hdac_bus_queue_event()
156 	struct hdac_bus *bus = container_of(work, struct hdac_bus, unsol_work);  in snd_hdac_bus_process_unsol_events()  local
161 	while (bus->unsol_rp != bus->unsol_wp) {  in snd_hdac_bus_process_unsol_events()
162 		rp = (bus->unsol_rp + 1) % HDA_UNSOL_QUEUE_SIZE;  in snd_hdac_bus_process_unsol_events()
163 		bus->unsol_rp = rp;  in snd_hdac_bus_process_unsol_events()
165 		res = bus->unsol_queue[rp];  in snd_hdac_bus_process_unsol_events()
166 		caddr = bus->unsol_queue[rp + 1];  in snd_hdac_bus_process_unsol_events()
169 		codec = bus->caddr_tbl[caddr & 0x0f];  in snd_hdac_bus_process_unsol_events()
179  * snd_hdac_bus_add_device - Add a codec to bus
180  * @bus: HDA core bus
183  * Adds the given codec to the list in the bus.  The caddr_tbl array
187 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec)  in snd_hdac_bus_add_device()  argument
189 	if (bus->caddr_tbl[codec->addr]) {  in snd_hdac_bus_add_device()
190 		dev_err(bus->dev, "address 0x%x is already occupied\n",  in snd_hdac_bus_add_device()
195 	list_add_tail(&codec->list, &bus->codec_list);  in snd_hdac_bus_add_device()
196 	bus->caddr_tbl[codec->addr] = codec;  in snd_hdac_bus_add_device()
197 	set_bit(codec->addr, &bus->codec_powered);  in snd_hdac_bus_add_device()
198 	bus->num_codecs++;  in snd_hdac_bus_add_device()
203  * snd_hdac_bus_remove_device - Remove a codec from bus
204  * @bus: HDA core bus
207 void snd_hdac_bus_remove_device(struct hdac_bus *bus,  in snd_hdac_bus_remove_device()  argument
210 	WARN_ON(bus != codec->bus);  in snd_hdac_bus_remove_device()
214 	bus->caddr_tbl[codec->addr] = NULL;  in snd_hdac_bus_remove_device()
215 	clear_bit(codec->addr, &bus->codec_powered);  in snd_hdac_bus_remove_device()
216 	bus->num_codecs--;  in snd_hdac_bus_remove_device()
217 	flush_work(&bus->unsol_work);  in snd_hdac_bus_remove_device()