mirror of https://gitee.com/openkylin/linux.git
324 lines
8.0 KiB
C
324 lines
8.0 KiB
C
/*
|
|
* Support for Digigram Lola PCI-e boards
|
|
*
|
|
* Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc., 59
|
|
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include "lola.h"
|
|
|
|
unsigned int lola_sample_rate_convert(unsigned int coded)
|
|
{
|
|
unsigned int freq;
|
|
|
|
/* base frequency */
|
|
switch (coded & 0x3) {
|
|
case 0: freq = 48000; break;
|
|
case 1: freq = 44100; break;
|
|
case 2: freq = 32000; break;
|
|
default: return 0; /* error */
|
|
}
|
|
|
|
/* multiplier / devisor */
|
|
switch (coded & 0x1c) {
|
|
case (0 << 2): break;
|
|
case (4 << 2): break;
|
|
case (1 << 2): freq *= 2; break;
|
|
case (2 << 2): freq *= 4; break;
|
|
case (5 << 2): freq /= 2; break;
|
|
case (6 << 2): freq /= 4; break;
|
|
default: return 0; /* error */
|
|
}
|
|
|
|
/* ajustement */
|
|
switch (coded & 0x60) {
|
|
case (0 << 5): break;
|
|
case (1 << 5): freq = (freq * 999) / 1000; break;
|
|
case (2 << 5): freq = (freq * 1001) / 1000; break;
|
|
default: return 0; /* error */
|
|
}
|
|
return freq;
|
|
}
|
|
|
|
/*
|
|
* Granualrity
|
|
*/
|
|
|
|
#define LOLA_MAXFREQ_AT_GRANULARITY_MIN 48000
|
|
#define LOLA_MAXFREQ_AT_GRANULARITY_BELOW_MAX 96000
|
|
|
|
static bool check_gran_clock_compatibility(struct lola *chip,
|
|
unsigned int val,
|
|
unsigned int freq)
|
|
{
|
|
if (!chip->granularity)
|
|
return true;
|
|
|
|
if (val < LOLA_GRANULARITY_MIN || val > LOLA_GRANULARITY_MAX ||
|
|
(val % LOLA_GRANULARITY_STEP) != 0)
|
|
return false;
|
|
|
|
if (val == LOLA_GRANULARITY_MIN) {
|
|
if (freq > LOLA_MAXFREQ_AT_GRANULARITY_MIN)
|
|
return false;
|
|
} else if (val < LOLA_GRANULARITY_MAX) {
|
|
if (freq > LOLA_MAXFREQ_AT_GRANULARITY_BELOW_MAX)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int lola_set_granularity(struct lola *chip, unsigned int val, bool force)
|
|
{
|
|
int err;
|
|
|
|
if (!force) {
|
|
if (val == chip->granularity)
|
|
return 0;
|
|
#if 0
|
|
/* change Gran only if there are no streams allocated ! */
|
|
if (chip->audio_in_alloc_mask || chip->audio_out_alloc_mask)
|
|
return -EBUSY;
|
|
#endif
|
|
if (!check_gran_clock_compatibility(chip, val,
|
|
chip->clock.cur_freq))
|
|
return -EINVAL;
|
|
}
|
|
|
|
chip->granularity = val;
|
|
val /= LOLA_GRANULARITY_STEP;
|
|
|
|
/* audio function group */
|
|
err = lola_codec_write(chip, 1, LOLA_VERB_SET_GRANULARITY_STEPS,
|
|
val, 0);
|
|
if (err < 0)
|
|
return err;
|
|
/* this can be a very slow function !!! */
|
|
usleep_range(400 * val, 20000);
|
|
return lola_codec_flush(chip);
|
|
}
|
|
|
|
/*
|
|
* Clock widget handling
|
|
*/
|
|
|
|
int lola_init_clock_widget(struct lola *chip, int nid)
|
|
{
|
|
unsigned int val;
|
|
int i, j, nitems, nb_verbs, idx, idx_list;
|
|
int err;
|
|
|
|
err = lola_read_param(chip, nid, LOLA_PAR_AUDIO_WIDGET_CAP, &val);
|
|
if (err < 0) {
|
|
dev_err(chip->card->dev, "Can't read wcaps for 0x%x\n", nid);
|
|
return err;
|
|
}
|
|
|
|
if ((val & 0xfff00000) != 0x01f00000) { /* test SubType and Type */
|
|
dev_dbg(chip->card->dev, "No valid clock widget\n");
|
|
return 0;
|
|
}
|
|
|
|
chip->clock.nid = nid;
|
|
chip->clock.items = val & 0xff;
|
|
dev_dbg(chip->card->dev, "clock_list nid=%x, entries=%d\n", nid,
|
|
chip->clock.items);
|
|
if (chip->clock.items > MAX_SAMPLE_CLOCK_COUNT) {
|
|
dev_err(chip->card->dev, "CLOCK_LIST too big: %d\n",
|
|
chip->clock.items);
|
|
return -EINVAL;
|
|
}
|
|
|
|
nitems = chip->clock.items;
|
|
nb_verbs = (nitems + 3) / 4;
|
|
idx = 0;
|
|
idx_list = 0;
|
|
for (i = 0; i < nb_verbs; i++) {
|
|
unsigned int res_ex;
|
|
unsigned short items[4];
|
|
|
|
err = lola_codec_read(chip, nid, LOLA_VERB_GET_CLOCK_LIST,
|
|
idx, 0, &val, &res_ex);
|
|
if (err < 0) {
|
|
dev_err(chip->card->dev, "Can't read CLOCK_LIST\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
items[0] = val & 0xfff;
|
|
items[1] = (val >> 16) & 0xfff;
|
|
items[2] = res_ex & 0xfff;
|
|
items[3] = (res_ex >> 16) & 0xfff;
|
|
|
|
for (j = 0; j < 4; j++) {
|
|
unsigned char type = items[j] >> 8;
|
|
unsigned int freq = items[j] & 0xff;
|
|
int format = LOLA_CLOCK_FORMAT_NONE;
|
|
bool add_clock = true;
|
|
if (type == LOLA_CLOCK_TYPE_INTERNAL) {
|
|
freq = lola_sample_rate_convert(freq);
|
|
if (freq < chip->sample_rate_min)
|
|
add_clock = false;
|
|
else if (freq == 48000) {
|
|
chip->clock.cur_index = idx_list;
|
|
chip->clock.cur_freq = 48000;
|
|
chip->clock.cur_valid = true;
|
|
}
|
|
} else if (type == LOLA_CLOCK_TYPE_VIDEO) {
|
|
freq = lola_sample_rate_convert(freq);
|
|
if (freq < chip->sample_rate_min)
|
|
add_clock = false;
|
|
/* video clock has a format (0:NTSC, 1:PAL)*/
|
|
if (items[j] & 0x80)
|
|
format = LOLA_CLOCK_FORMAT_NTSC;
|
|
else
|
|
format = LOLA_CLOCK_FORMAT_PAL;
|
|
}
|
|
if (add_clock) {
|
|
struct lola_sample_clock *sc;
|
|
sc = &chip->clock.sample_clock[idx_list];
|
|
sc->type = type;
|
|
sc->format = format;
|
|
sc->freq = freq;
|
|
/* keep the index used with the board */
|
|
chip->clock.idx_lookup[idx_list] = idx;
|
|
idx_list++;
|
|
} else {
|
|
chip->clock.items--;
|
|
}
|
|
if (++idx >= nitems)
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* enable unsolicited events of the clock widget */
|
|
int lola_enable_clock_events(struct lola *chip)
|
|
{
|
|
unsigned int res;
|
|
int err;
|
|
|
|
err = lola_codec_read(chip, chip->clock.nid,
|
|
LOLA_VERB_SET_UNSOLICITED_ENABLE,
|
|
LOLA_UNSOLICITED_ENABLE | LOLA_UNSOLICITED_TAG,
|
|
0, &res, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
if (res) {
|
|
dev_warn(chip->card->dev, "error in enable_clock_events %d\n",
|
|
res);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int lola_set_clock_index(struct lola *chip, unsigned int idx)
|
|
{
|
|
unsigned int res;
|
|
int err;
|
|
|
|
err = lola_codec_read(chip, chip->clock.nid,
|
|
LOLA_VERB_SET_CLOCK_SELECT,
|
|
chip->clock.idx_lookup[idx],
|
|
0, &res, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
if (res) {
|
|
dev_warn(chip->card->dev, "error in set_clock %d\n", res);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
bool lola_update_ext_clock_freq(struct lola *chip, unsigned int val)
|
|
{
|
|
unsigned int tag;
|
|
|
|
/* the current EXTERNAL clock information gets updated by interrupt
|
|
* with an unsolicited response
|
|
*/
|
|
if (!val)
|
|
return false;
|
|
tag = (val >> LOLA_UNSOL_RESP_TAG_OFFSET) & LOLA_UNSOLICITED_TAG_MASK;
|
|
if (tag != LOLA_UNSOLICITED_TAG)
|
|
return false;
|
|
|
|
/* only for current = external clocks */
|
|
if (chip->clock.sample_clock[chip->clock.cur_index].type !=
|
|
LOLA_CLOCK_TYPE_INTERNAL) {
|
|
chip->clock.cur_freq = lola_sample_rate_convert(val & 0x7f);
|
|
chip->clock.cur_valid = (val & 0x100) != 0;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int lola_set_clock(struct lola *chip, int idx)
|
|
{
|
|
int freq = 0;
|
|
bool valid = false;
|
|
|
|
if (idx == chip->clock.cur_index) {
|
|
/* current clock is allowed */
|
|
freq = chip->clock.cur_freq;
|
|
valid = chip->clock.cur_valid;
|
|
} else if (chip->clock.sample_clock[idx].type ==
|
|
LOLA_CLOCK_TYPE_INTERNAL) {
|
|
/* internal clocks allowed */
|
|
freq = chip->clock.sample_clock[idx].freq;
|
|
valid = true;
|
|
}
|
|
|
|
if (!freq || !valid)
|
|
return -EINVAL;
|
|
|
|
if (!check_gran_clock_compatibility(chip, chip->granularity, freq))
|
|
return -EINVAL;
|
|
|
|
if (idx != chip->clock.cur_index) {
|
|
int err = lola_set_clock_index(chip, idx);
|
|
if (err < 0)
|
|
return err;
|
|
/* update new settings */
|
|
chip->clock.cur_index = idx;
|
|
chip->clock.cur_freq = freq;
|
|
chip->clock.cur_valid = true;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int lola_set_sample_rate(struct lola *chip, int rate)
|
|
{
|
|
int i;
|
|
|
|
if (chip->clock.cur_freq == rate && chip->clock.cur_valid)
|
|
return 0;
|
|
/* search for new dwClockIndex */
|
|
for (i = 0; i < chip->clock.items; i++) {
|
|
if (chip->clock.sample_clock[i].type == LOLA_CLOCK_TYPE_INTERNAL &&
|
|
chip->clock.sample_clock[i].freq == rate)
|
|
break;
|
|
}
|
|
if (i >= chip->clock.items)
|
|
return -EINVAL;
|
|
return lola_set_clock(chip, i);
|
|
}
|
|
|