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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
310 lines
7.4 KiB
C
310 lines
7.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Support for Digigram Lola PCI-e boards
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*
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* Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include "lola.h"
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unsigned int lola_sample_rate_convert(unsigned int coded)
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{
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unsigned int freq;
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/* base frequency */
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switch (coded & 0x3) {
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case 0: freq = 48000; break;
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case 1: freq = 44100; break;
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case 2: freq = 32000; break;
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default: return 0; /* error */
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}
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/* multiplier / devisor */
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switch (coded & 0x1c) {
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case (0 << 2): break;
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case (4 << 2): break;
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case (1 << 2): freq *= 2; break;
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case (2 << 2): freq *= 4; break;
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case (5 << 2): freq /= 2; break;
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case (6 << 2): freq /= 4; break;
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default: return 0; /* error */
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}
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/* ajustement */
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switch (coded & 0x60) {
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case (0 << 5): break;
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case (1 << 5): freq = (freq * 999) / 1000; break;
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case (2 << 5): freq = (freq * 1001) / 1000; break;
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default: return 0; /* error */
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}
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return freq;
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}
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/*
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* Granualrity
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*/
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#define LOLA_MAXFREQ_AT_GRANULARITY_MIN 48000
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#define LOLA_MAXFREQ_AT_GRANULARITY_BELOW_MAX 96000
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static bool check_gran_clock_compatibility(struct lola *chip,
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unsigned int val,
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unsigned int freq)
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{
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if (!chip->granularity)
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return true;
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if (val < LOLA_GRANULARITY_MIN || val > LOLA_GRANULARITY_MAX ||
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(val % LOLA_GRANULARITY_STEP) != 0)
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return false;
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if (val == LOLA_GRANULARITY_MIN) {
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if (freq > LOLA_MAXFREQ_AT_GRANULARITY_MIN)
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return false;
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} else if (val < LOLA_GRANULARITY_MAX) {
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if (freq > LOLA_MAXFREQ_AT_GRANULARITY_BELOW_MAX)
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return false;
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}
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return true;
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}
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int lola_set_granularity(struct lola *chip, unsigned int val, bool force)
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{
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int err;
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if (!force) {
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if (val == chip->granularity)
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return 0;
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#if 0
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/* change Gran only if there are no streams allocated ! */
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if (chip->audio_in_alloc_mask || chip->audio_out_alloc_mask)
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return -EBUSY;
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#endif
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if (!check_gran_clock_compatibility(chip, val,
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chip->clock.cur_freq))
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return -EINVAL;
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}
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chip->granularity = val;
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val /= LOLA_GRANULARITY_STEP;
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/* audio function group */
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err = lola_codec_write(chip, 1, LOLA_VERB_SET_GRANULARITY_STEPS,
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val, 0);
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if (err < 0)
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return err;
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/* this can be a very slow function !!! */
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usleep_range(400 * val, 20000);
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return lola_codec_flush(chip);
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}
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/*
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* Clock widget handling
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*/
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int lola_init_clock_widget(struct lola *chip, int nid)
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{
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unsigned int val;
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int i, j, nitems, nb_verbs, idx, idx_list;
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int err;
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err = lola_read_param(chip, nid, LOLA_PAR_AUDIO_WIDGET_CAP, &val);
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if (err < 0) {
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dev_err(chip->card->dev, "Can't read wcaps for 0x%x\n", nid);
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return err;
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}
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if ((val & 0xfff00000) != 0x01f00000) { /* test SubType and Type */
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dev_dbg(chip->card->dev, "No valid clock widget\n");
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return 0;
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}
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chip->clock.nid = nid;
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chip->clock.items = val & 0xff;
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dev_dbg(chip->card->dev, "clock_list nid=%x, entries=%d\n", nid,
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chip->clock.items);
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if (chip->clock.items > MAX_SAMPLE_CLOCK_COUNT) {
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dev_err(chip->card->dev, "CLOCK_LIST too big: %d\n",
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chip->clock.items);
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return -EINVAL;
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}
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nitems = chip->clock.items;
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nb_verbs = (nitems + 3) / 4;
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idx = 0;
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idx_list = 0;
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for (i = 0; i < nb_verbs; i++) {
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unsigned int res_ex;
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unsigned short items[4];
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err = lola_codec_read(chip, nid, LOLA_VERB_GET_CLOCK_LIST,
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idx, 0, &val, &res_ex);
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if (err < 0) {
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dev_err(chip->card->dev, "Can't read CLOCK_LIST\n");
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return -EINVAL;
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}
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items[0] = val & 0xfff;
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items[1] = (val >> 16) & 0xfff;
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items[2] = res_ex & 0xfff;
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items[3] = (res_ex >> 16) & 0xfff;
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for (j = 0; j < 4; j++) {
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unsigned char type = items[j] >> 8;
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unsigned int freq = items[j] & 0xff;
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int format = LOLA_CLOCK_FORMAT_NONE;
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bool add_clock = true;
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if (type == LOLA_CLOCK_TYPE_INTERNAL) {
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freq = lola_sample_rate_convert(freq);
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if (freq < chip->sample_rate_min)
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add_clock = false;
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else if (freq == 48000) {
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chip->clock.cur_index = idx_list;
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chip->clock.cur_freq = 48000;
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chip->clock.cur_valid = true;
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}
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} else if (type == LOLA_CLOCK_TYPE_VIDEO) {
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freq = lola_sample_rate_convert(freq);
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if (freq < chip->sample_rate_min)
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add_clock = false;
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/* video clock has a format (0:NTSC, 1:PAL)*/
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if (items[j] & 0x80)
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format = LOLA_CLOCK_FORMAT_NTSC;
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else
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format = LOLA_CLOCK_FORMAT_PAL;
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}
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if (add_clock) {
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struct lola_sample_clock *sc;
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sc = &chip->clock.sample_clock[idx_list];
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sc->type = type;
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sc->format = format;
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sc->freq = freq;
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/* keep the index used with the board */
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chip->clock.idx_lookup[idx_list] = idx;
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idx_list++;
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} else {
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chip->clock.items--;
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}
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if (++idx >= nitems)
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break;
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}
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}
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return 0;
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}
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/* enable unsolicited events of the clock widget */
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int lola_enable_clock_events(struct lola *chip)
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{
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unsigned int res;
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int err;
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err = lola_codec_read(chip, chip->clock.nid,
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LOLA_VERB_SET_UNSOLICITED_ENABLE,
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LOLA_UNSOLICITED_ENABLE | LOLA_UNSOLICITED_TAG,
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0, &res, NULL);
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if (err < 0)
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return err;
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if (res) {
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dev_warn(chip->card->dev, "error in enable_clock_events %d\n",
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res);
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return -EINVAL;
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}
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return 0;
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}
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int lola_set_clock_index(struct lola *chip, unsigned int idx)
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{
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unsigned int res;
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int err;
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err = lola_codec_read(chip, chip->clock.nid,
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LOLA_VERB_SET_CLOCK_SELECT,
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chip->clock.idx_lookup[idx],
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0, &res, NULL);
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if (err < 0)
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return err;
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if (res) {
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dev_warn(chip->card->dev, "error in set_clock %d\n", res);
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return -EINVAL;
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}
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return 0;
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}
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bool lola_update_ext_clock_freq(struct lola *chip, unsigned int val)
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{
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unsigned int tag;
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/* the current EXTERNAL clock information gets updated by interrupt
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* with an unsolicited response
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*/
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if (!val)
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return false;
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tag = (val >> LOLA_UNSOL_RESP_TAG_OFFSET) & LOLA_UNSOLICITED_TAG_MASK;
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if (tag != LOLA_UNSOLICITED_TAG)
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return false;
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/* only for current = external clocks */
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if (chip->clock.sample_clock[chip->clock.cur_index].type !=
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LOLA_CLOCK_TYPE_INTERNAL) {
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chip->clock.cur_freq = lola_sample_rate_convert(val & 0x7f);
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chip->clock.cur_valid = (val & 0x100) != 0;
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}
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return true;
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}
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int lola_set_clock(struct lola *chip, int idx)
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{
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int freq = 0;
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bool valid = false;
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if (idx == chip->clock.cur_index) {
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/* current clock is allowed */
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freq = chip->clock.cur_freq;
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valid = chip->clock.cur_valid;
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} else if (chip->clock.sample_clock[idx].type ==
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LOLA_CLOCK_TYPE_INTERNAL) {
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/* internal clocks allowed */
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freq = chip->clock.sample_clock[idx].freq;
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valid = true;
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}
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if (!freq || !valid)
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return -EINVAL;
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if (!check_gran_clock_compatibility(chip, chip->granularity, freq))
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return -EINVAL;
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if (idx != chip->clock.cur_index) {
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int err = lola_set_clock_index(chip, idx);
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if (err < 0)
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return err;
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/* update new settings */
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chip->clock.cur_index = idx;
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chip->clock.cur_freq = freq;
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chip->clock.cur_valid = true;
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}
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return 0;
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}
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int lola_set_sample_rate(struct lola *chip, int rate)
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{
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int i;
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if (chip->clock.cur_freq == rate && chip->clock.cur_valid)
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return 0;
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/* search for new dwClockIndex */
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for (i = 0; i < chip->clock.items; i++) {
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if (chip->clock.sample_clock[i].type == LOLA_CLOCK_TYPE_INTERNAL &&
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chip->clock.sample_clock[i].freq == rate)
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break;
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}
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if (i >= chip->clock.items)
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return -EINVAL;
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return lola_set_clock(chip, i);
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}
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