3  * HD-audio core bus driver
23  * snd_hdac_bus_init - initialize a HD-audio bas bus
24  * @bus: the pointer to bus object
26  * @ops: bus verb operators
30 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,  in snd_hdac_bus_init()  argument
33 	memset(bus, 0, sizeof(*bus));  in snd_hdac_bus_init()
34 	bus->dev = dev;  in snd_hdac_bus_init()
36 		bus->ops = ops;  in snd_hdac_bus_init()
38 		bus->ops = &default_ops;  in snd_hdac_bus_init()
39 	bus->dma_type = SNDRV_DMA_TYPE_DEV;  in snd_hdac_bus_init()
40 	INIT_LIST_HEAD(&bus->stream_list);  in snd_hdac_bus_init()
41 	INIT_LIST_HEAD(&bus->codec_list);  in snd_hdac_bus_init()
42 	INIT_WORK(&bus->unsol_work, snd_hdac_bus_process_unsol_events);  in snd_hdac_bus_init()
43 	spin_lock_init(&bus->reg_lock);  in snd_hdac_bus_init()
44 	mutex_init(&bus->cmd_mutex);  in snd_hdac_bus_init()
45 	mutex_init(&bus->lock);  in snd_hdac_bus_init()
46 	INIT_LIST_HEAD(&bus->hlink_list);  in snd_hdac_bus_init()
47 	init_waitqueue_head(&bus->rirb_wq);  in snd_hdac_bus_init()
48 	bus->irq = -1;  in snd_hdac_bus_init()
59 	bus->sdo_limit = 8;  in snd_hdac_bus_init()
66  * snd_hdac_bus_exit - clean up a HD-audio bas bus
67  * @bus: the pointer to bus object
69 void snd_hdac_bus_exit(struct hdac_bus *bus)  in snd_hdac_bus_exit()  argument
71 	WARN_ON(!list_empty(&bus->stream_list));  in snd_hdac_bus_exit()
72 	WARN_ON(!list_empty(&bus->codec_list));  in snd_hdac_bus_exit()
73 	cancel_work_sync(&bus->unsol_work);  in snd_hdac_bus_exit()
78  * snd_hdac_bus_exec_verb - execute a HD-audio verb on the given bus
79  * @bus: bus object
86 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,  in snd_hdac_bus_exec_verb()  argument
91 	mutex_lock(&bus->cmd_mutex);  in snd_hdac_bus_exec_verb()
92 	err = snd_hdac_bus_exec_verb_unlocked(bus, addr, cmd, res);  in snd_hdac_bus_exec_verb()
93 	mutex_unlock(&bus->cmd_mutex);  in snd_hdac_bus_exec_verb()
99  * @bus: bus object
106 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,  in snd_hdac_bus_exec_verb_unlocked()  argument
117 	else if (bus->sync_write)  in snd_hdac_bus_exec_verb_unlocked()
120 		trace_hda_send_cmd(bus, cmd);  in snd_hdac_bus_exec_verb_unlocked()
121 		err = bus->ops->command(bus, cmd);  in snd_hdac_bus_exec_verb_unlocked()
125 		err = bus->ops->get_response(bus, addr, &tmp);  in snd_hdac_bus_exec_verb_unlocked()
130 		err = bus->ops->get_response(bus, addr, res);  in snd_hdac_bus_exec_verb_unlocked()
131 		trace_hda_get_response(bus, addr, *res);  in snd_hdac_bus_exec_verb_unlocked()
139  * @bus: the BUS
147 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex)  in snd_hdac_bus_queue_event()  argument
151 	if (!bus)  in snd_hdac_bus_queue_event()
154 	trace_hda_unsol_event(bus, res, res_ex);  in snd_hdac_bus_queue_event()
155 	wp = (bus->unsol_wp + 1) % HDA_UNSOL_QUEUE_SIZE;  in snd_hdac_bus_queue_event()
156 	bus->unsol_wp = wp;  in snd_hdac_bus_queue_event()
159 	bus->unsol_queue[wp] = res;  in snd_hdac_bus_queue_event()
160 	bus->unsol_queue[wp + 1] = res_ex;  in snd_hdac_bus_queue_event()
162 	schedule_work(&bus->unsol_work);  in snd_hdac_bus_queue_event()
170 	struct hdac_bus *bus = container_of(work, struct hdac_bus, unsol_work);  in snd_hdac_bus_process_unsol_events()  local
175 	spin_lock_irq(&bus->reg_lock);  in snd_hdac_bus_process_unsol_events()
176 	while (bus->unsol_rp != bus->unsol_wp) {  in snd_hdac_bus_process_unsol_events()
177 		rp = (bus->unsol_rp + 1) % HDA_UNSOL_QUEUE_SIZE;  in snd_hdac_bus_process_unsol_events()
178 		bus->unsol_rp = rp;  in snd_hdac_bus_process_unsol_events()
180 		res = bus->unsol_queue[rp];  in snd_hdac_bus_process_unsol_events()
181 		caddr = bus->unsol_queue[rp + 1];  in snd_hdac_bus_process_unsol_events()
184 		codec = bus->caddr_tbl[caddr & 0x0f];  in snd_hdac_bus_process_unsol_events()
187 		spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_process_unsol_events()
191 		spin_lock_irq(&bus->reg_lock);  in snd_hdac_bus_process_unsol_events()
193 	spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_process_unsol_events()
197  * snd_hdac_bus_add_device - Add a codec to bus
198  * @bus: HDA core bus
201  * Adds the given codec to the list in the bus.  The caddr_tbl array
205 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec)  in snd_hdac_bus_add_device()  argument
207 	if (bus->caddr_tbl[codec->addr]) {  in snd_hdac_bus_add_device()
208 		dev_err(bus->dev, "address 0x%x is already occupied\n",  in snd_hdac_bus_add_device()
213 	list_add_tail(&codec->list, &bus->codec_list);  in snd_hdac_bus_add_device()
214 	bus->caddr_tbl[codec->addr] = codec;  in snd_hdac_bus_add_device()
215 	set_bit(codec->addr, &bus->codec_powered);  in snd_hdac_bus_add_device()
216 	bus->num_codecs++;  in snd_hdac_bus_add_device()
221  * snd_hdac_bus_remove_device - Remove a codec from bus
222  * @bus: HDA core bus
225 void snd_hdac_bus_remove_device(struct hdac_bus *bus,  in snd_hdac_bus_remove_device()  argument
228 	WARN_ON(bus != codec->bus);  in snd_hdac_bus_remove_device()
232 	bus->caddr_tbl[codec->addr] = NULL;  in snd_hdac_bus_remove_device()
233 	clear_bit(codec->addr, &bus->codec_powered);  in snd_hdac_bus_remove_device()
234 	bus->num_codecs--;  in snd_hdac_bus_remove_device()
235 	flush_work(&bus->unsol_work);  in snd_hdac_bus_remove_device()