1 // SPDX-License-Identifier: GPL-2.0-only
19 #include <sound/ac97/codec.h>
20 #include <sound/ac97/controller.h>
21 #include <sound/ac97/regs.h>
41 	return -ENODEV;  in ac97_unbound_ctrl_write()
47 	return -ENODEV;  in ac97_unbound_ctrl_read()
63 		return ERR_PTR(-EINVAL);  in ac97_codec_find()
65 	return ac97_ctrl->codecs[codec_num];  in ac97_codec_find()
74 	char compat[] = "ac97,0000,0000";  in ac97_of_get_child_device()
76 	snprintf(compat, sizeof(compat), "ac97,%04x,%04x",  in ac97_of_get_child_device()
79 	for_each_child_of_node(ac97_ctrl->parent->of_node, node) {  in ac97_of_get_child_device()
95 	ac97_ctrl = adev->ac97_ctrl;  in ac97_codec_release()
96 	ac97_ctrl->codecs[adev->num] = NULL;  in ac97_codec_release()
97 	of_node_put(dev->of_node);  in ac97_codec_release()
109 		return -ENOMEM;  in ac97_codec_add()
110 	ac97_ctrl->codecs[idx] = codec;  in ac97_codec_add()
111 	codec->vendor_id = vendor_id;  in ac97_codec_add()
112 	codec->dev.release = ac97_codec_release;  in ac97_codec_add()
113 	codec->dev.bus = &ac97_bus_type;  in ac97_codec_add()
114 	codec->dev.parent = &ac97_ctrl->adap;  in ac97_codec_add()
115 	codec->num = idx;  in ac97_codec_add()
116 	codec->ac97_ctrl = ac97_ctrl;  in ac97_codec_add()
118 	device_initialize(&codec->dev);  in ac97_codec_add()
119 	dev_set_name(&codec->dev, "%s:%u", dev_name(ac97_ctrl->parent), idx);  in ac97_codec_add()
120 	codec->dev.of_node = ac97_of_get_child_device(ac97_ctrl, idx,  in ac97_codec_add()
123 	ret = device_add(&codec->dev);  in ac97_codec_add()
125 		put_device(&codec->dev);  in ac97_codec_add()
138 	ret = adrv->ops->read(adrv, codec_num, AC97_VENDOR_ID1);  in snd_ac97_bus_scan_one()
143 	ret = adrv->ops->read(adrv, codec_num, AC97_VENDOR_ID2);  in snd_ac97_bus_scan_one()
148 	dev_dbg(&adrv->adap, "%s(codec_num=%u): vendor_id=0x%08x\n",  in snd_ac97_bus_scan_one()
161 		if (!(ac97_ctrl->slots_available & BIT(i)))  in ac97_bus_scan()
176 	ac97_ctrl->ops->reset(ac97_ctrl);  in ac97_bus_reset()
182  * snd_ac97_codec_driver_register - register an AC97 codec driver
183  * @dev: AC97 driver codec to register
185  * Register an AC97 codec driver to the ac97 bus driver, aka. the AC97 digital
186  * controller.
192 	drv->driver.bus = &ac97_bus_type;  in snd_ac97_codec_driver_register()
193 	return driver_register(&drv->driver);  in snd_ac97_codec_driver_register()
198  * snd_ac97_codec_driver_unregister - unregister an AC97 codec driver
199  * @dev: AC97 codec driver to unregister
201  * Unregister a previously registered ac97 codec driver.
205 	driver_unregister(&drv->driver);  in snd_ac97_codec_driver_unregister()
210  * snd_ac97_codec_get_platdata - get platform_data
211  * @adev: the ac97 codec device
214  * available, while ac97 device are auto-created upon probe, this retrieves the
215  * platdata which was setup on ac97 controller registration.
221 	struct ac97_controller *ac97_ctrl = adev->ac97_ctrl;  in snd_ac97_codec_get_platdata()
223 	return ac97_ctrl->codecs_pdata[adev->num];  in snd_ac97_codec_get_platdata()
232 		if (ac97_ctrl->codecs[i]) {  in ac97_ctrl_codecs_unregister()
233 			ac97_ctrl->codecs[i]->ac97_ctrl = &ac97_unbound_ctrl;  in ac97_ctrl_codecs_unregister()
234 			device_unregister(&ac97_ctrl->codecs[i]->dev);  in ac97_ctrl_codecs_unregister()
246 	ac97_ctrl->ops->reset(ac97_ctrl);  in cold_reset_store()
259 		return -ENODEV;  in warm_reset_store()
263 	ac97_ctrl->ops->warm_reset(ac97_ctrl);  in warm_reset_store()
289 	list_del(&ac97_ctrl->controllers);  in ac97_del_adapter()
292 	device_unregister(&ac97_ctrl->adap);  in ac97_del_adapter()
300 	idr_remove(&ac97_adapter_idr, ac97_ctrl->nr);  in ac97_adapter_release()
301 	dev_dbg(&ac97_ctrl->adap, "adapter unregistered by %s\n",  in ac97_adapter_release()
302 		dev_name(ac97_ctrl->parent));  in ac97_adapter_release()
316 	ac97_ctrl->nr = ret;  in ac97_add_adapter()
318 		dev_set_name(&ac97_ctrl->adap, "ac97-%d", ret);  in ac97_add_adapter()
319 		ac97_ctrl->adap.type = &ac97_adapter_type;  in ac97_add_adapter()
320 		ac97_ctrl->adap.parent = ac97_ctrl->parent;  in ac97_add_adapter()
321 		ret = device_register(&ac97_ctrl->adap);  in ac97_add_adapter()
323 			put_device(&ac97_ctrl->adap);  in ac97_add_adapter()
326 		list_add(&ac97_ctrl->controllers, &ac97_controllers);  in ac97_add_adapter()
330 		dev_dbg(&ac97_ctrl->adap, "adapter registered by %s\n",  in ac97_add_adapter()
331 			dev_name(ac97_ctrl->parent));  in ac97_add_adapter()
336  * snd_ac97_controller_register - register an ac97 controller
337  * @ops: the ac97 bus operations
338  * @dev: the device providing the ac97 DC function
339  * @slots_available: mask of the ac97 codecs that can be scanned and probed
342  * Register a digital controller which can control up to 4 ac97 codecs. This is
343  * the controller side of the AC97 AC-link, while the slave side are the codecs.
345  * Returns a valid controller upon success, negative pointer value upon error
356 		return ERR_PTR(-ENOMEM);  in snd_ac97_controller_register()
359 		ac97_ctrl->codecs_pdata[i] = codecs_pdata[i];  in snd_ac97_controller_register()
361 	ac97_ctrl->ops = ops;  in snd_ac97_controller_register()
362 	ac97_ctrl->slots_available = slots_available;  in snd_ac97_controller_register()
363 	ac97_ctrl->parent = dev;  in snd_ac97_controller_register()
379  * snd_ac97_controller_unregister - unregister an ac97 controller
395 	if (ret == 0 && dev->driver) {  in ac97_pm_runtime_suspend()
397 			clk_disable(codec->clk);  in ac97_pm_runtime_suspend()
399 			clk_disable_unprepare(codec->clk);  in ac97_pm_runtime_suspend()
410 	if (dev->driver) {  in ac97_pm_runtime_resume()
412 			ret = clk_enable(codec->clk);  in ac97_pm_runtime_resume()
414 			ret = clk_prepare_enable(codec->clk);  in ac97_pm_runtime_resume()
440 	adev->clk = clk_get(&adev->dev, "ac97_clk");  in ac97_get_enable_clk()
441 	if (IS_ERR(adev->clk))  in ac97_get_enable_clk()
442 		return PTR_ERR(adev->clk);  in ac97_get_enable_clk()
444 	ret = clk_prepare_enable(adev->clk);  in ac97_get_enable_clk()
446 		clk_put(adev->clk);  in ac97_get_enable_clk()
453 	clk_disable_unprepare(adev->clk);  in ac97_put_disable_clk()
454 	clk_put(adev->clk);  in ac97_put_disable_clk()
462 	return sysfs_emit(buf, "%08x", codec->vendor_id);  in vendor_id_show()
476 	const struct ac97_id *id = adrv->id_table;  in ac97_bus_match()
479 	if (adev->vendor_id == 0x0 || adev->vendor_id == 0xffffffff)  in ac97_bus_match()
483 		if (ac97_ids_match(id[i].id, adev->vendor_id, id[i].mask))  in ac97_bus_match()
493 	struct ac97_codec_driver *adrv = to_ac97_driver(dev->driver);  in ac97_bus_probe()
504 	ret = adrv->probe(adev);  in ac97_bus_probe()
519 	struct ac97_codec_driver *adrv = to_ac97_driver(dev->driver);  in ac97_bus_remove()
526 	adrv->remove(adev);  in ac97_bus_remove()
554 MODULE_DESCRIPTION("AC97 bus interface");