1 // SPDX-License-Identifier: GPL-2.0
2 // Support for audio capture for tm5600/6000/6010
3 // Copyright (c) 2007-2008 Mauro Carvalho Chehab <mchehab@kernel.org>
5 // Based on cx88-alsa.c
15 #include <sound/core.h>
23 #include "tm6000-regs.h"
29 		printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg); \
36 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
64  * BOARD Specific: Sets audio DMA
69 	struct tm6000_core *core = chip->core;  in _tm6000_start_audio_dma()  local
71 	dprintk(1, "Starting audio DMA\n");  in _tm6000_start_audio_dma()
73 	/* Enables audio */  in _tm6000_start_audio_dma()
74 	tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_IF, 0x40, 0x40);  in _tm6000_start_audio_dma()
76 	tm6000_set_audio_bitrate(core, 48000);  in _tm6000_start_audio_dma()
82  * BOARD Specific: Resets audio DMA
86 	struct tm6000_core *core = chip->core;  in _tm6000_stop_audio_dma()  local
88 	dprintk(1, "Stopping audio DMA\n");  in _tm6000_stop_audio_dma()
90 	/* Disables audio */  in _tm6000_stop_audio_dma()
91 	tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_IF, 0x00, 0x40);  in _tm6000_stop_audio_dma()
126  * audio pcm capture open callback
131 	struct snd_pcm_runtime *runtime = substream->runtime;  in snd_tm6000_pcm_open()
139 	chip->substream = substream;  in snd_tm6000_pcm_open()
141 	runtime->hw = snd_tm6000_digital_hw;  in snd_tm6000_pcm_open()
151  * audio close callback
156 	struct tm6000_core *core = chip->core;  in snd_tm6000_close()  local
158 	if (atomic_read(&core->stream_started) > 0) {  in snd_tm6000_close()
159 		atomic_set(&core->stream_started, 0);  in snd_tm6000_close()
160 		schedule_work(&core->wq_trigger);  in snd_tm6000_close()
166 static int tm6000_fillbuf(struct tm6000_core *core, char *buf, int size)  in tm6000_fillbuf()  argument
168 	struct snd_tm6000_card *chip = core->adev;  in tm6000_fillbuf()
169 	struct snd_pcm_substream *substream = chip->substream;  in tm6000_fillbuf()
175 	if (atomic_read(&core->stream_started) == 0)  in tm6000_fillbuf()
180 		return -EINVAL;  in tm6000_fillbuf()
183 	runtime = substream->runtime;  in tm6000_fillbuf()
184 	if (!runtime || !runtime->dma_area) {  in tm6000_fillbuf()
186 		return -EINVAL;  in tm6000_fillbuf()
189 	buf_pos = chip->buf_pos;  in tm6000_fillbuf()
190 	stride = runtime->frame_bits >> 3;  in tm6000_fillbuf()
194 		return -EINVAL;  in tm6000_fillbuf()
200 		return -EINVAL;  in tm6000_fillbuf()
203 	dprintk(1, "Copying %d bytes at %p[%d] - buf size=%d x %d\n", size,  in tm6000_fillbuf()
204 		runtime->dma_area, buf_pos,  in tm6000_fillbuf()
205 		(unsigned int)runtime->buffer_size, stride);  in tm6000_fillbuf()
207 	if (buf_pos + length >= runtime->buffer_size) {  in tm6000_fillbuf()
208 		unsigned int cnt = runtime->buffer_size - buf_pos;  in tm6000_fillbuf()
209 		memcpy(runtime->dma_area + buf_pos * stride, buf, cnt * stride);  in tm6000_fillbuf()
210 		memcpy(runtime->dma_area, buf + cnt * stride,  in tm6000_fillbuf()
211 			length * stride - cnt * stride);  in tm6000_fillbuf()
213 		memcpy(runtime->dma_area + buf_pos * stride, buf,  in tm6000_fillbuf()
218 	chip->buf_pos += length;  in tm6000_fillbuf()
219 	if (chip->buf_pos >= runtime->buffer_size)  in tm6000_fillbuf()
220 		chip->buf_pos -= runtime->buffer_size;  in tm6000_fillbuf()
222 	chip->period_pos += length;  in tm6000_fillbuf()
223 	if (chip->period_pos >= runtime->period_size) {  in tm6000_fillbuf()
224 		chip->period_pos -= runtime->period_size;  in tm6000_fillbuf()
243 	chip->buf_pos = 0;  in snd_tm6000_prepare()
244 	chip->period_pos = 0;  in snd_tm6000_prepare()
255 	struct tm6000_core *core = container_of(work, struct tm6000_core,  in audio_trigger()  local
257 	struct snd_tm6000_card *chip = core->adev;  in audio_trigger()
259 	if (atomic_read(&core->stream_started)) {  in audio_trigger()
271 	struct tm6000_core *core = chip->core;  in snd_tm6000_card_trigger()  local
278 		atomic_set(&core->stream_started, 1);  in snd_tm6000_card_trigger()
283 		atomic_set(&core->stream_started, 0);  in snd_tm6000_card_trigger()
286 		err = -EINVAL;  in snd_tm6000_card_trigger()
289 	schedule_work(&core->wq_trigger);  in snd_tm6000_card_trigger()
300 	return chip->buf_pos;  in snd_tm6000_pointer()
318 /* FIXME: Control interface - How to control volume/mute? */
325  * Alsa Constructor - Component probe
340 		return -ENODEV;  in tm6000_audio_init()
343 		return -ENOENT;  in tm6000_audio_init()
345 	rc = snd_card_new(&dev->udev->dev, index[devnr], "tm6000",  in tm6000_audio_init()
351 	strscpy(card->driver, "tm6000-alsa", sizeof(card->driver));  in tm6000_audio_init()
352 	strscpy(card->shortname, "TM5600/60x0", sizeof(card->shortname));  in tm6000_audio_init()
353 	sprintf(card->longname, "TM5600/60x0 Audio at bus %d device %d",  in tm6000_audio_init()
354 		dev->udev->bus->busnum, dev->udev->devnum);  in tm6000_audio_init()
357 		le16_to_cpu(dev->udev->descriptor.idVendor),  in tm6000_audio_init()
358 		le16_to_cpu(dev->udev->descriptor.idProduct));  in tm6000_audio_init()
363 		rc = -ENOMEM;  in tm6000_audio_init()
367 	chip->core = dev;  in tm6000_audio_init()
368 	chip->card = card;  in tm6000_audio_init()
369 	dev->adev = chip;  in tm6000_audio_init()
370 	spin_lock_init(&chip->reg_lock);  in tm6000_audio_init()
372 	rc = snd_pcm_new(card, "TM6000 Audio", 0, 0, 1, &pcm);  in tm6000_audio_init()
376 	pcm->info_flags = 0;  in tm6000_audio_init()
377 	pcm->private_data = chip;  in tm6000_audio_init()
378 	strscpy(pcm->name, "Trident TM5600/60x0", sizeof(pcm->name));  in tm6000_audio_init()
383 	INIT_WORK(&dev->wq_trigger, audio_trigger);  in tm6000_audio_init()
388 	dprintk(1, "Registered audio driver for %s\n", card->longname);  in tm6000_audio_init()
394 	dev->adev = NULL;  in tm6000_audio_init()
406 	chip = dev->adev;  in tm6000_audio_fini()
411 	if (!chip->card)  in tm6000_audio_fini()
414 	snd_card_free(chip->card);  in tm6000_audio_fini()
415 	chip->card = NULL;  in tm6000_audio_fini()
417 	dev->adev = NULL;  in tm6000_audio_fini()
424 	.name	= "TM6000 Audio Extension",