mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
![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>
296 lines
6.8 KiB
C
296 lines
6.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Driver for Digigram VX soundcards
|
|
*
|
|
* IEC958 stuff
|
|
*
|
|
* Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <sound/core.h>
|
|
#include <sound/vx_core.h>
|
|
#include "vx_cmd.h"
|
|
|
|
|
|
/*
|
|
* vx_modify_board_clock - tell the board that its clock has been modified
|
|
* @sync: DSP needs to resynchronize its FIFO
|
|
*/
|
|
static int vx_modify_board_clock(struct vx_core *chip, int sync)
|
|
{
|
|
struct vx_rmh rmh;
|
|
|
|
vx_init_rmh(&rmh, CMD_MODIFY_CLOCK);
|
|
/* Ask the DSP to resynchronize its FIFO. */
|
|
if (sync)
|
|
rmh.Cmd[0] |= CMD_MODIFY_CLOCK_S_BIT;
|
|
return vx_send_msg(chip, &rmh);
|
|
}
|
|
|
|
/*
|
|
* vx_modify_board_inputs - resync audio inputs
|
|
*/
|
|
static int vx_modify_board_inputs(struct vx_core *chip)
|
|
{
|
|
struct vx_rmh rmh;
|
|
|
|
vx_init_rmh(&rmh, CMD_RESYNC_AUDIO_INPUTS);
|
|
rmh.Cmd[0] |= 1 << 0; /* reference: AUDIO 0 */
|
|
return vx_send_msg(chip, &rmh);
|
|
}
|
|
|
|
/*
|
|
* vx_read_one_cbit - read one bit from UER config
|
|
* @index: the bit index
|
|
* returns 0 or 1.
|
|
*/
|
|
static int vx_read_one_cbit(struct vx_core *chip, int index)
|
|
{
|
|
int val;
|
|
|
|
mutex_lock(&chip->lock);
|
|
if (chip->type >= VX_TYPE_VXPOCKET) {
|
|
vx_outb(chip, CSUER, 1); /* read */
|
|
vx_outb(chip, RUER, index & XX_UER_CBITS_OFFSET_MASK);
|
|
val = (vx_inb(chip, RUER) >> 7) & 0x01;
|
|
} else {
|
|
vx_outl(chip, CSUER, 1); /* read */
|
|
vx_outl(chip, RUER, index & XX_UER_CBITS_OFFSET_MASK);
|
|
val = (vx_inl(chip, RUER) >> 7) & 0x01;
|
|
}
|
|
mutex_unlock(&chip->lock);
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* vx_write_one_cbit - write one bit to UER config
|
|
* @index: the bit index
|
|
* @val: bit value, 0 or 1
|
|
*/
|
|
static void vx_write_one_cbit(struct vx_core *chip, int index, int val)
|
|
{
|
|
val = !!val; /* 0 or 1 */
|
|
mutex_lock(&chip->lock);
|
|
if (vx_is_pcmcia(chip)) {
|
|
vx_outb(chip, CSUER, 0); /* write */
|
|
vx_outb(chip, RUER, (val << 7) | (index & XX_UER_CBITS_OFFSET_MASK));
|
|
} else {
|
|
vx_outl(chip, CSUER, 0); /* write */
|
|
vx_outl(chip, RUER, (val << 7) | (index & XX_UER_CBITS_OFFSET_MASK));
|
|
}
|
|
mutex_unlock(&chip->lock);
|
|
}
|
|
|
|
/*
|
|
* vx_read_uer_status - read the current UER status
|
|
* @mode: pointer to store the UER mode, VX_UER_MODE_XXX
|
|
*
|
|
* returns the frequency of UER, or 0 if not sync,
|
|
* or a negative error code.
|
|
*/
|
|
static int vx_read_uer_status(struct vx_core *chip, unsigned int *mode)
|
|
{
|
|
int val, freq;
|
|
|
|
/* Default values */
|
|
freq = 0;
|
|
|
|
/* Read UER status */
|
|
if (vx_is_pcmcia(chip))
|
|
val = vx_inb(chip, CSUER);
|
|
else
|
|
val = vx_inl(chip, CSUER);
|
|
if (val < 0)
|
|
return val;
|
|
/* If clock is present, read frequency */
|
|
if (val & VX_SUER_CLOCK_PRESENT_MASK) {
|
|
switch (val & VX_SUER_FREQ_MASK) {
|
|
case VX_SUER_FREQ_32KHz_MASK:
|
|
freq = 32000;
|
|
break;
|
|
case VX_SUER_FREQ_44KHz_MASK:
|
|
freq = 44100;
|
|
break;
|
|
case VX_SUER_FREQ_48KHz_MASK:
|
|
freq = 48000;
|
|
break;
|
|
}
|
|
}
|
|
if (val & VX_SUER_DATA_PRESENT_MASK)
|
|
/* bit 0 corresponds to consumer/professional bit */
|
|
*mode = vx_read_one_cbit(chip, 0) ?
|
|
VX_UER_MODE_PROFESSIONAL : VX_UER_MODE_CONSUMER;
|
|
else
|
|
*mode = VX_UER_MODE_NOT_PRESENT;
|
|
|
|
return freq;
|
|
}
|
|
|
|
|
|
/*
|
|
* compute the sample clock value from frequency
|
|
*
|
|
* The formula is as follows:
|
|
*
|
|
* HexFreq = (dword) ((double) ((double) 28224000 / (double) Frequency))
|
|
* switch ( HexFreq & 0x00000F00 )
|
|
* case 0x00000100: ;
|
|
* case 0x00000200:
|
|
* case 0x00000300: HexFreq -= 0x00000201 ;
|
|
* case 0x00000400:
|
|
* case 0x00000500:
|
|
* case 0x00000600:
|
|
* case 0x00000700: HexFreq = (dword) (((double) 28224000 / (double) (Frequency*2)) - 1)
|
|
* default : HexFreq = (dword) ((double) 28224000 / (double) (Frequency*4)) - 0x000001FF
|
|
*/
|
|
|
|
static int vx_calc_clock_from_freq(struct vx_core *chip, int freq)
|
|
{
|
|
int hexfreq;
|
|
|
|
if (snd_BUG_ON(freq <= 0))
|
|
return 0;
|
|
|
|
hexfreq = (28224000 * 10) / freq;
|
|
hexfreq = (hexfreq + 5) / 10;
|
|
|
|
/* max freq = 55125 Hz */
|
|
if (snd_BUG_ON(hexfreq <= 0x00000200))
|
|
return 0;
|
|
|
|
if (hexfreq <= 0x03ff)
|
|
return hexfreq - 0x00000201;
|
|
if (hexfreq <= 0x07ff)
|
|
return (hexfreq / 2) - 1;
|
|
if (hexfreq <= 0x0fff)
|
|
return (hexfreq / 4) + 0x000001ff;
|
|
|
|
return 0x5fe; /* min freq = 6893 Hz */
|
|
}
|
|
|
|
|
|
/*
|
|
* vx_change_clock_source - change the clock source
|
|
* @source: the new source
|
|
*/
|
|
static void vx_change_clock_source(struct vx_core *chip, int source)
|
|
{
|
|
/* we mute DAC to prevent clicks */
|
|
vx_toggle_dac_mute(chip, 1);
|
|
mutex_lock(&chip->lock);
|
|
chip->ops->set_clock_source(chip, source);
|
|
chip->clock_source = source;
|
|
mutex_unlock(&chip->lock);
|
|
/* unmute */
|
|
vx_toggle_dac_mute(chip, 0);
|
|
}
|
|
|
|
|
|
/*
|
|
* set the internal clock
|
|
*/
|
|
void vx_set_internal_clock(struct vx_core *chip, unsigned int freq)
|
|
{
|
|
int clock;
|
|
|
|
/* Get real clock value */
|
|
clock = vx_calc_clock_from_freq(chip, freq);
|
|
snd_printdd(KERN_DEBUG "set internal clock to 0x%x from freq %d\n", clock, freq);
|
|
mutex_lock(&chip->lock);
|
|
if (vx_is_pcmcia(chip)) {
|
|
vx_outb(chip, HIFREQ, (clock >> 8) & 0x0f);
|
|
vx_outb(chip, LOFREQ, clock & 0xff);
|
|
} else {
|
|
vx_outl(chip, HIFREQ, (clock >> 8) & 0x0f);
|
|
vx_outl(chip, LOFREQ, clock & 0xff);
|
|
}
|
|
mutex_unlock(&chip->lock);
|
|
}
|
|
|
|
|
|
/*
|
|
* set the iec958 status bits
|
|
* @bits: 32-bit status bits
|
|
*/
|
|
void vx_set_iec958_status(struct vx_core *chip, unsigned int bits)
|
|
{
|
|
int i;
|
|
|
|
if (chip->chip_status & VX_STAT_IS_STALE)
|
|
return;
|
|
|
|
for (i = 0; i < 32; i++)
|
|
vx_write_one_cbit(chip, i, bits & (1 << i));
|
|
}
|
|
|
|
|
|
/*
|
|
* vx_set_clock - change the clock and audio source if necessary
|
|
*/
|
|
int vx_set_clock(struct vx_core *chip, unsigned int freq)
|
|
{
|
|
int src_changed = 0;
|
|
|
|
if (chip->chip_status & VX_STAT_IS_STALE)
|
|
return 0;
|
|
|
|
/* change the audio source if possible */
|
|
vx_sync_audio_source(chip);
|
|
|
|
if (chip->clock_mode == VX_CLOCK_MODE_EXTERNAL ||
|
|
(chip->clock_mode == VX_CLOCK_MODE_AUTO &&
|
|
chip->audio_source == VX_AUDIO_SRC_DIGITAL)) {
|
|
if (chip->clock_source != UER_SYNC) {
|
|
vx_change_clock_source(chip, UER_SYNC);
|
|
mdelay(6);
|
|
src_changed = 1;
|
|
}
|
|
} else if (chip->clock_mode == VX_CLOCK_MODE_INTERNAL ||
|
|
(chip->clock_mode == VX_CLOCK_MODE_AUTO &&
|
|
chip->audio_source != VX_AUDIO_SRC_DIGITAL)) {
|
|
if (chip->clock_source != INTERNAL_QUARTZ) {
|
|
vx_change_clock_source(chip, INTERNAL_QUARTZ);
|
|
src_changed = 1;
|
|
}
|
|
if (chip->freq == freq)
|
|
return 0;
|
|
vx_set_internal_clock(chip, freq);
|
|
if (src_changed)
|
|
vx_modify_board_inputs(chip);
|
|
}
|
|
if (chip->freq == freq)
|
|
return 0;
|
|
chip->freq = freq;
|
|
vx_modify_board_clock(chip, 1);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* vx_change_frequency - called from interrupt handler
|
|
*/
|
|
int vx_change_frequency(struct vx_core *chip)
|
|
{
|
|
int freq;
|
|
|
|
if (chip->chip_status & VX_STAT_IS_STALE)
|
|
return 0;
|
|
|
|
if (chip->clock_source == INTERNAL_QUARTZ)
|
|
return 0;
|
|
/*
|
|
* Read the real UER board frequency
|
|
*/
|
|
freq = vx_read_uer_status(chip, &chip->uer_detected);
|
|
if (freq < 0)
|
|
return freq;
|
|
/*
|
|
* The frequency computed by the DSP is good and
|
|
* is different from the previous computed.
|
|
*/
|
|
if (freq == 48000 || freq == 44100 || freq == 32000)
|
|
chip->freq_detected = freq;
|
|
|
|
return 0;
|
|
}
|