diff options
Diffstat (limited to 'kernel/sound/pci/lola/lola_clock.c')
| -rw-r--r-- | kernel/sound/pci/lola/lola_clock.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/kernel/sound/pci/lola/lola_clock.c b/kernel/sound/pci/lola/lola_clock.c new file mode 100644 index 000000000..2bef6b412 --- /dev/null +++ b/kernel/sound/pci/lola/lola_clock.c @@ -0,0 +1,323 @@ +/* + * 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); +} + |