54 static void dac_audio_start_timer(struct snd_sh_dac *chip)  in dac_audio_start_timer()  argument
56 	hrtimer_start(&chip->hrtimer, chip->wakeups_per_second,  in dac_audio_start_timer()
60 static void dac_audio_stop_timer(struct snd_sh_dac *chip)  in dac_audio_stop_timer()  argument
62 	hrtimer_cancel(&chip->hrtimer);  in dac_audio_stop_timer()
65 static void dac_audio_reset(struct snd_sh_dac *chip)  in dac_audio_reset()  argument
67 	dac_audio_stop_timer(chip);  in dac_audio_reset()
68 	chip->buffer_begin = chip->buffer_end = chip->data_buffer;  in dac_audio_reset()
69 	chip->processed = 0;  in dac_audio_reset()
70 	chip->empty = 1;  in dac_audio_reset()
73 static void dac_audio_set_rate(struct snd_sh_dac *chip)  in dac_audio_set_rate()  argument
75 	chip->wakeups_per_second = 1000000000 / chip->rate;  in dac_audio_set_rate()
101 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);  in snd_sh_dac_pcm_open()  local
106 	chip->substream = substream;  in snd_sh_dac_pcm_open()
107 	chip->buffer_begin = chip->buffer_end = chip->data_buffer;  in snd_sh_dac_pcm_open()
108 	chip->processed = 0;  in snd_sh_dac_pcm_open()
109 	chip->empty = 1;  in snd_sh_dac_pcm_open()
111 	chip->pdata->start(chip->pdata);  in snd_sh_dac_pcm_open()
118 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);  in snd_sh_dac_pcm_close()  local
120 	chip->substream = NULL;  in snd_sh_dac_pcm_close()
122 	dac_audio_stop_timer(chip);  in snd_sh_dac_pcm_close()
123 	chip->pdata->stop(chip->pdata);  in snd_sh_dac_pcm_close()
142 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);  in snd_sh_dac_pcm_prepare()  local
143 	struct snd_pcm_runtime *runtime = chip->substream->runtime;  in snd_sh_dac_pcm_prepare()
145 	chip->buffer_size = runtime->buffer_size;  in snd_sh_dac_pcm_prepare()
146 	memset(chip->data_buffer, 0, chip->pdata->buffer_size);  in snd_sh_dac_pcm_prepare()
153 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);  in snd_sh_dac_pcm_trigger()  local
157 		dac_audio_start_timer(chip);  in snd_sh_dac_pcm_trigger()
160 		chip->buffer_begin = chip->buffer_end = chip->data_buffer;  in snd_sh_dac_pcm_trigger()
161 		chip->processed = 0;  in snd_sh_dac_pcm_trigger()
162 		chip->empty = 1;  in snd_sh_dac_pcm_trigger()
163 		dac_audio_stop_timer(chip);  in snd_sh_dac_pcm_trigger()
177 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);  in snd_sh_dac_pcm_copy()  local
180 	if (copy_from_user_toio(chip->data_buffer + pos, src, count))  in snd_sh_dac_pcm_copy()
182 	chip->buffer_end = chip->data_buffer + pos + count;  in snd_sh_dac_pcm_copy()
184 	if (chip->empty) {  in snd_sh_dac_pcm_copy()
185 		chip->empty = 0;  in snd_sh_dac_pcm_copy()
186 		dac_audio_start_timer(chip);  in snd_sh_dac_pcm_copy()
197 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);  in snd_sh_dac_pcm_copy_kernel()  local
200 	memcpy_toio(chip->data_buffer + pos, src, count);  in snd_sh_dac_pcm_copy_kernel()
201 	chip->buffer_end = chip->data_buffer + pos + count;  in snd_sh_dac_pcm_copy_kernel()
203 	if (chip->empty) {  in snd_sh_dac_pcm_copy_kernel()
204 		chip->empty = 0;  in snd_sh_dac_pcm_copy_kernel()
205 		dac_audio_start_timer(chip);  in snd_sh_dac_pcm_copy_kernel()
216 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);  in snd_sh_dac_pcm_silence()  local
219 	memset_io(chip->data_buffer + pos, 0, count);  in snd_sh_dac_pcm_silence()
220 	chip->buffer_end = chip->data_buffer + pos + count;  in snd_sh_dac_pcm_silence()
222 	if (chip->empty) {  in snd_sh_dac_pcm_silence()
223 		chip->empty = 0;  in snd_sh_dac_pcm_silence()
224 		dac_audio_start_timer(chip);  in snd_sh_dac_pcm_silence()
233 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);  in snd_sh_dac_pcm_pointer()  local
234 	int pointer = chip->buffer_begin - chip->data_buffer;  in snd_sh_dac_pcm_pointer()
255 static int snd_sh_dac_pcm(struct snd_sh_dac *chip, int device)  in snd_sh_dac_pcm()  argument
261 	err = snd_pcm_new(chip->card, "SH_DAC PCM", device, 1, 0, &pcm);  in snd_sh_dac_pcm()
265 	pcm->private_data = chip;  in snd_sh_dac_pcm()
288 static int snd_sh_dac_free(struct snd_sh_dac *chip)  in snd_sh_dac_free()  argument
291 	kfree(chip->data_buffer);  in snd_sh_dac_free()
292 	kfree(chip);  in snd_sh_dac_free()
299 	struct snd_sh_dac *chip = device->device_data;  in snd_sh_dac_dev_free()  local
301 	return snd_sh_dac_free(chip);  in snd_sh_dac_dev_free()
306 	struct snd_sh_dac *chip = container_of(handle, struct snd_sh_dac,  in sh_dac_audio_timer()  local
308 	struct snd_pcm_runtime *runtime = chip->substream->runtime;  in sh_dac_audio_timer()
311 	if (!chip->empty) {  in sh_dac_audio_timer()
312 		sh_dac_output(*chip->buffer_begin, chip->pdata->channel);  in sh_dac_audio_timer()
313 		chip->buffer_begin++;  in sh_dac_audio_timer()
315 		chip->processed++;  in sh_dac_audio_timer()
316 		if (chip->processed >= b_ps) {  in sh_dac_audio_timer()
317 			chip->processed -= b_ps;  in sh_dac_audio_timer()
318 			snd_pcm_period_elapsed(chip->substream);  in sh_dac_audio_timer()
321 		if (chip->buffer_begin == (chip->data_buffer +  in sh_dac_audio_timer()
322 					   chip->buffer_size - 1))  in sh_dac_audio_timer()
323 			chip->buffer_begin = chip->data_buffer;  in sh_dac_audio_timer()
325 		if (chip->buffer_begin == chip->buffer_end)  in sh_dac_audio_timer()
326 			chip->empty = 1;  in sh_dac_audio_timer()
330 	if (!chip->empty)  in sh_dac_audio_timer()
331 		hrtimer_start(&chip->hrtimer, chip->wakeups_per_second,  in sh_dac_audio_timer()
337 /* create  --  chip-specific constructor for the cards components */
342 	struct snd_sh_dac *chip;  in snd_sh_dac_create()  local
351 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);  in snd_sh_dac_create()
352 	if (chip == NULL)  in snd_sh_dac_create()
355 	chip->card = card;  in snd_sh_dac_create()
357 	hrtimer_init(&chip->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);  in snd_sh_dac_create()
358 	chip->hrtimer.function = sh_dac_audio_timer;  in snd_sh_dac_create()
360 	dac_audio_reset(chip);  in snd_sh_dac_create()
361 	chip->rate = 8000;  in snd_sh_dac_create()
362 	dac_audio_set_rate(chip);  in snd_sh_dac_create()
364 	chip->pdata = devptr->dev.platform_data;  in snd_sh_dac_create()
366 	chip->data_buffer = kmalloc(chip->pdata->buffer_size, GFP_KERNEL);  in snd_sh_dac_create()
367 	if (chip->data_buffer == NULL) {  in snd_sh_dac_create()
368 		kfree(chip);  in snd_sh_dac_create()
372 	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);  in snd_sh_dac_create()
374 		snd_sh_dac_free(chip);  in snd_sh_dac_create()
378 	*rchip = chip;  in snd_sh_dac_create()
386 	struct snd_sh_dac *chip;  in snd_sh_dac_probe()  local
396 	err = snd_sh_dac_create(card, devptr, &chip);  in snd_sh_dac_probe()
400 	err = snd_sh_dac_pcm(chip, 0);  in snd_sh_dac_probe()