You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
311 lines
7.6 KiB
311 lines
7.6 KiB
/*
|
|
* Driver for Digigram VX soundcards
|
|
*
|
|
* IEC958 stuff
|
|
*
|
|
* Copyright (c) 2002 by 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 <sound/driver.h>
|
|
#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(vx_core_t *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(vx_core_t *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(vx_core_t *chip, int index)
|
|
{
|
|
unsigned long flags;
|
|
int val;
|
|
spin_lock_irqsave(&chip->lock, flags);
|
|
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;
|
|
}
|
|
spin_unlock_irqrestore(&chip->lock, flags);
|
|
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(vx_core_t *chip, int index, int val)
|
|
{
|
|
unsigned long flags;
|
|
val = !!val; /* 0 or 1 */
|
|
spin_lock_irqsave(&chip->lock, flags);
|
|
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));
|
|
}
|
|
spin_unlock_irqrestore(&chip->lock, flags);
|
|
}
|
|
|
|
/*
|
|
* 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(vx_core_t *chip, 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(vx_core_t *chip, int freq)
|
|
{
|
|
int hexfreq;
|
|
|
|
snd_assert(freq > 0, return 0);
|
|
|
|
hexfreq = (28224000 * 10) / freq;
|
|
hexfreq = (hexfreq + 5) / 10;
|
|
|
|
/* max freq = 55125 Hz */
|
|
snd_assert(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(vx_core_t *chip, int source)
|
|
{
|
|
unsigned long flags;
|
|
|
|
/* we mute DAC to prevent clicks */
|
|
vx_toggle_dac_mute(chip, 1);
|
|
spin_lock_irqsave(&chip->lock, flags);
|
|
chip->ops->set_clock_source(chip, source);
|
|
chip->clock_source = source;
|
|
spin_unlock_irqrestore(&chip->lock, flags);
|
|
/* unmute */
|
|
vx_toggle_dac_mute(chip, 0);
|
|
}
|
|
|
|
|
|
/*
|
|
* set the internal clock
|
|
*/
|
|
void vx_set_internal_clock(vx_core_t *chip, unsigned int freq)
|
|
{
|
|
int clock;
|
|
unsigned long flags;
|
|
/* 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);
|
|
spin_lock_irqsave(&chip->lock, flags);
|
|
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);
|
|
}
|
|
spin_unlock_irqrestore(&chip->lock, flags);
|
|
}
|
|
|
|
|
|
/*
|
|
* set the iec958 status bits
|
|
* @bits: 32-bit status bits
|
|
*/
|
|
void vx_set_iec958_status(vx_core_t *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(vx_core_t *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(vx_core_t *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;
|
|
}
|
|
|