// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PMac DBDMA lowlevel functions
*
* Copyright ( c ) by Takashi Iwai < tiwai @ suse . de >
* code based on dmasound . c .
*/
#include <linux/io.h>
#include <asm /irq.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <sound/core.h>
#include "pmac.h"
#include <sound/pcm_params.h>
#include <asm /pmac_feature.h>
/* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
static const int awacs_freqs[8 ] = {
44100 , 29400 , 22050 , 17640 , 14700 , 11025 , 8820 , 7350
};
/* fixed frequency table for tumbler */
static const int tumbler_freqs[1 ] = {
44100
};
/*
* we will allocate a single ' emergency ' dbdma cmd block to use if the
* tx status comes up " DEAD " . This happens on some PowerComputing Pmac
* clones , either owing to a bug in dbdma or some interaction between
* IDE and sound . However , this measure would deal with DEAD status if
* it appeared elsewhere .
*/
static struct pmac_dbdma emergency_dbdma;
static int emergency_in_use;
/*
* allocate DBDMA command arrays
*/
static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
{
unsigned int rsize = sizeof (struct dbdma_cmd) * (size + 1 );
rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
&rec->dma_base, GFP_KERNEL);
if (rec->space == NULL)
return -ENOMEM;
rec->size = size;
memset(rec->space, 0 , rsize);
rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
rec->addr = rec->dma_base + (unsigned long )((char *)rec->cmds - (char *)rec->space);
return 0 ;
}
static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
{
if (rec->space) {
unsigned int rsize = sizeof (struct dbdma_cmd) * (rec->size + 1 );
dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
}
}
/*
* pcm stuff
*/
/*
* look up frequency table
*/
unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
{
int i, ok, found;
ok = rec->cur_freqs;
if (rate > chip->freq_table[0 ])
return 0 ;
found = 0 ;
for (i = 0 ; i < chip->num_freqs; i++, ok >>= 1 ) {
if (! (ok & 1 )) continue ;
found = i;
if (rate >= chip->freq_table[i])
break ;
}
return found;
}
/*
* check whether another stream is active
*/
static inline int another_stream(int stream)
{
return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
}
/*
* get a stream of the opposite direction
*/
static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
{
switch (stream) {
case SNDRV_PCM_STREAM_PLAYBACK:
return &chip->playback;
case SNDRV_PCM_STREAM_CAPTURE:
return &chip->capture;
default :
snd_BUG();
return NULL;
}
}
/*
* wait while run status is on
*/
static inline void
snd_pmac_wait_ack(struct pmac_stream *rec)
{
int timeout = 50000 ;
while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0 )
udelay(1 );
}
/*
* set the format and rate to the chip .
* call the lowlevel function if defined ( e . g . for AWACS ) .
*/
static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
{
/* set up frequency and format */
out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8 ));
out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0 );
if (chip->set_format)
chip->set_format(chip);
}
/*
* stop the DMA transfer
*/
static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
{
out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16 );
snd_pmac_wait_ack(rec);
}
/*
* set the command pointer address
*/
static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
{
out_le32(&rec->dma->cmdptr, cmd->addr);
}
/*
* start the DMA
*/
static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
{
out_le32(&rec->dma->control, status | (status << 16 ));
}
/*
* prepare playback / capture stream
*/
static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
{
int i;
volatile struct dbdma_cmd __iomem *cp;
struct snd_pcm_runtime *runtime = subs->runtime;
int rate_index;
long offset;
struct pmac_stream *astr;
rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
rec->period_size = snd_pcm_lib_period_bytes(subs);
rec->nperiods = rec->dma_size / rec->period_size;
rec->cur_period = 0 ;
rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
/* set up constraints */
astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
if (! astr)
return -EINVAL;
astr->cur_freqs = 1 << rate_index;
astr->cur_formats = 1 << runtime->format;
chip->rate_index = rate_index;
chip->format = runtime->format;
/* We really want to execute a DMA stop command, after the AWACS
* is initialized .
* For reasons I don ' t understand , it stops the hissing noise
* common to many PowerBook G3 systems and random noise otherwise
* captured on iBook2 ' s about every third time . - ReneR
*/
spin_lock_irq(&chip->reg_lock);
snd_pmac_dma_stop(rec);
chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
snd_pmac_dma_set_command(rec, &chip->extra_dma);
snd_pmac_dma_run(rec, RUN);
spin_unlock_irq(&chip->reg_lock);
mdelay(5 );
spin_lock_irq(&chip->reg_lock);
/* continuous DMA memory type doesn't provide the physical address,
* so we need to resolve the address here . . .
*/
offset = runtime->dma_addr;
for (i = 0 , cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
cp->phy_addr = cpu_to_le32(offset);
cp->req_count = cpu_to_le16(rec->period_size);
/*cp->res_count = cpu_to_le16(0);*/
cp->xfer_status = cpu_to_le16(0 );
offset += rec->period_size;
}
/* make loop */
cp->command = cpu_to_le16(DBDMA_NOP | BR_ALWAYS);
cp->cmd_dep = cpu_to_le32(rec->cmd.addr);
snd_pmac_dma_stop(rec);
snd_pmac_dma_set_command(rec, &rec->cmd);
spin_unlock_irq(&chip->reg_lock);
return 0 ;
}
/*
* PCM trigger / stop
*/
static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
struct snd_pcm_substream *subs, int cmd)
{
volatile struct dbdma_cmd __iomem *cp;
int i, command;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
if (rec->running)
return -EBUSY;
command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
spin_lock(&chip->reg_lock);
snd_pmac_beep_stop(chip);
snd_pmac_pcm_set_format(chip);
for (i = 0 , cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
out_le16(&cp->command, command);
snd_pmac_dma_set_command(rec, &rec->cmd);
(void )in_le32(&rec->dma->status);
snd_pmac_dma_run(rec, RUN|WAKE);
rec->running = 1 ;
spin_unlock(&chip->reg_lock);
break ;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
spin_lock(&chip->reg_lock);
rec->running = 0 ;
snd_pmac_dma_stop(rec);
for (i = 0 , cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
out_le16(&cp->command, DBDMA_STOP);
spin_unlock(&chip->reg_lock);
break ;
default :
return -EINVAL;
}
return 0 ;
}
/*
* return the current pointer
*/
inline
static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
struct pmac_stream *rec,
struct snd_pcm_substream *subs)
{
int count = 0 ;
#if 1 /* hmm.. how can we get the current dma pointer?? */
int stat;
volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
stat = le16_to_cpu(cp->xfer_status);
if (stat & (ACTIVE|DEAD)) {
count = in_le16(&cp->res_count);
if (count)
count = rec->period_size - count;
}
#endif
count += rec->cur_period * rec->period_size;
return bytes_to_frames(subs->runtime, count);
}
/*
* playback
*/
static int snd_pmac_playback_prepare(struct snd_pcm_substream *subs)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
}
static int snd_pmac_playback_trigger(struct snd_pcm_substream *subs,
int cmd)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
}
static snd_pcm_uframes_t snd_pmac_playback_pointer(struct snd_pcm_substream *subs)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
}
/*
* capture
*/
static int snd_pmac_capture_prepare(struct snd_pcm_substream *subs)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
}
static int snd_pmac_capture_trigger(struct snd_pcm_substream *subs,
int cmd)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
}
static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
}
/*
* Handle DEAD DMA transfers :
* if the TX status comes up " DEAD " - reported on some Power Computing machines
* we need to re - start the dbdma - but from a different physical start address
* and with a different transfer length . It would get very messy to do this
* with the normal dbdma_cmd blocks - we would have to re - write the buffer start
* addresses each time . So , we will keep a single dbdma_cmd block which can be
* fiddled with .
* When DEAD status is first reported the content of the faulted dbdma block is
* copied into the emergency buffer and we note that the buffer is in use .
* we then bump the start physical address by the amount that was successfully
* output before it died .
* On any subsequent DEAD result we just do the bump - ups ( we know that we are
* already using the emergency dbdma_cmd ) .
* CHECK : this just tries to " do it " . It is possible that we should abandon
* xfers when the number of residual bytes gets below a certain value - I can
* see that this might cause a loop - forever if a too small transfer causes
* DEAD status . However this is a TODO for now - we ' ll see what gets reported .
* When we get a successful transfer result with the emergency buffer we just
* pretend that it completed using the original dmdma_cmd and carry on . The
* ' next_cmd ' field will already point back to the original loop of blocks .
*/
static inline void snd_pmac_pcm_dead_xfer(struct pmac_stream *rec,
volatile struct dbdma_cmd __iomem *cp)
{
unsigned short req, res ;
unsigned int phy ;
/* to clear DEAD status we must first clear RUN
set it to quiescent to be on the safe side */
(void )in_le32(&rec->dma->status);
out_le32(&rec->dma->control, (RUN|PAUSE|FLUSH|WAKE) << 16 );
if (!emergency_in_use) { /* new problem */
memcpy((void *)emergency_dbdma.cmds, (void *)cp,
sizeof (struct dbdma_cmd));
emergency_in_use = 1 ;
cp->xfer_status = cpu_to_le16(0 );
cp->req_count = cpu_to_le16(rec->period_size);
cp = emergency_dbdma.cmds;
}
/* now bump the values to reflect the amount
we haven't yet shifted */
req = le16_to_cpu(cp->req_count);
res = le16_to_cpu(cp->res_count);
phy = le32_to_cpu(cp->phy_addr);
phy += (req - res);
cp->req_count = cpu_to_le16(res);
cp->res_count = cpu_to_le16(0 );
cp->xfer_status = cpu_to_le16(0 );
cp->phy_addr = cpu_to_le32(phy);
cp->cmd_dep = cpu_to_le32(rec->cmd.addr
+ sizeof (struct dbdma_cmd)*((rec->cur_period+1 )%rec->nperiods));
cp->command = cpu_to_le16(OUTPUT_MORE | BR_ALWAYS | INTR_ALWAYS);
/* point at our patched up command block */
out_le32(&rec->dma->cmdptr, emergency_dbdma.addr);
/* we must re-start the controller */
(void )in_le32(&rec->dma->status);
/* should complete clearing the DEAD status */
out_le32(&rec->dma->control, ((RUN|WAKE) << 16 ) + (RUN|WAKE));
}
/*
* update playback / capture pointer from interrupts
*/
static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec)
{
volatile struct dbdma_cmd __iomem *cp;
int c;
int stat;
spin_lock(&chip->reg_lock);
if (rec->running) {
for (c = 0 ; c < rec->nperiods; c++) { /* at most all fragments */
if (emergency_in_use) /* already using DEAD xfer? */
cp = emergency_dbdma.cmds;
else
cp = &rec->cmd.cmds[rec->cur_period];
stat = le16_to_cpu(cp->xfer_status);
if (stat & DEAD) {
snd_pmac_pcm_dead_xfer(rec, cp);
break ; /* this block is still going */
}
if (emergency_in_use)
emergency_in_use = 0 ; /* done that */
if (! (stat & ACTIVE))
break ;
cp->xfer_status = cpu_to_le16(0 );
cp->req_count = cpu_to_le16(rec->period_size);
/*cp->res_count = cpu_to_le16(0);*/
rec->cur_period++;
if (rec->cur_period >= rec->nperiods) {
rec->cur_period = 0 ;
}
spin_unlock(&chip->reg_lock);
snd_pcm_period_elapsed(rec->substream);
spin_lock(&chip->reg_lock);
}
}
spin_unlock(&chip->reg_lock);
}
/*
* hw info
*/
static const struct snd_pcm_hardware snd_pmac_playback =
{
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_RESUME),
.formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_8000_44100,
.rate_min = 7350 ,
.rate_max = 44100 ,
.channels_min = 2 ,
.channels_max = 2 ,
.buffer_bytes_max = 131072 ,
.period_bytes_min = 256 ,
.period_bytes_max = 16384 ,
.periods_min = 3 ,
.periods_max = PMAC_MAX_FRAGS,
};
static const struct snd_pcm_hardware snd_pmac_capture =
{
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_RESUME),
.formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_8000_44100,
.rate_min = 7350 ,
.rate_max = 44100 ,
.channels_min = 2 ,
.channels_max = 2 ,
.buffer_bytes_max = 131072 ,
.period_bytes_min = 256 ,
.period_bytes_max = 16384 ,
.periods_min = 3 ,
.periods_max = PMAC_MAX_FRAGS,
};
#if 0 // NYI
static int snd_pmac_hw_rule_rate(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_pmac *chip = rule->private ;
struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0 ]);
int i, freq_table[8 ], num_freqs;
if (! rec)
return -EINVAL;
num_freqs = 0 ;
for (i = chip->num_freqs - 1 ; i >= 0 ; i--) {
if (rec->cur_freqs & (1 << i))
freq_table[num_freqs++] = chip->freq_table[i];
}
return snd_interval_list(hw_param_interval(params, rule->var),
num_freqs, freq_table, 0 );
}
static int snd_pmac_hw_rule_format(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_pmac *chip = rule->private ;
struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0 ]);
if (! rec)
return -EINVAL;
return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
rec->cur_formats);
}
#endif // NYI
static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
int i;
/* look up frequency table and fill bit mask */
runtime->hw.rates = 0 ;
for (i = 0 ; i < chip->num_freqs; i++)
if (chip->freqs_ok & (1 << i))
runtime->hw.rates |=
snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
/* check for minimum and maximum rates */
for (i = 0 ; i < chip->num_freqs; i++) {
if (chip->freqs_ok & (1 << i)) {
runtime->hw.rate_max = chip->freq_table[i];
break ;
}
}
for (i = chip->num_freqs - 1 ; i >= 0 ; i--) {
if (chip->freqs_ok & (1 << i)) {
runtime->hw.rate_min = chip->freq_table[i];
break ;
}
}
runtime->hw.formats = chip->formats_ok;
if (chip->can_capture) {
if (! chip->can_duplex)
runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
}
runtime->private_data = rec;
rec->substream = subs;
#if 0 /* FIXME: still under development.. */
snd_pcm_hw_rule_add(runtime, 0 , SNDRV_PCM_HW_PARAM_RATE,
snd_pmac_hw_rule_rate, chip, rec->stream, -1 );
snd_pcm_hw_rule_add(runtime, 0 , SNDRV_PCM_HW_PARAM_FORMAT,
snd_pmac_hw_rule_format, chip, rec->stream, -1 );
#endif
runtime->hw.periods_max = rec->cmd.size - 1 ;
/* constraints to fix choppy sound */
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
return 0 ;
}
static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
struct snd_pcm_substream *subs)
{
struct pmac_stream *astr;
snd_pmac_dma_stop(rec);
astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
if (! astr)
return -EINVAL;
/* reset constraints */
astr->cur_freqs = chip->freqs_ok;
astr->cur_formats = chip->formats_ok;
return 0 ;
}
static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
subs->runtime->hw = snd_pmac_playback;
return snd_pmac_pcm_open(chip, &chip->playback, subs);
}
static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
subs->runtime->hw = snd_pmac_capture;
return snd_pmac_pcm_open(chip, &chip->capture, subs);
}
static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
return snd_pmac_pcm_close(chip, &chip->playback, subs);
}
static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
{
struct snd_pmac *chip = snd_pcm_substream_chip(subs);
return snd_pmac_pcm_close(chip, &chip->capture, subs);
}
/*
*/
static const struct snd_pcm_ops snd_pmac_playback_ops = {
.open = snd_pmac_playback_open,
.close = snd_pmac_playback_close,
.prepare = snd_pmac_playback_prepare,
.trigger = snd_pmac_playback_trigger,
.pointer = snd_pmac_playback_pointer,
};
static const struct snd_pcm_ops snd_pmac_capture_ops = {
.open = snd_pmac_capture_open,
.close = snd_pmac_capture_close,
.prepare = snd_pmac_capture_prepare,
.trigger = snd_pmac_capture_trigger,
.pointer = snd_pmac_capture_pointer,
};
int snd_pmac_pcm_new(struct snd_pmac *chip)
{
struct snd_pcm *pcm;
int err;
int num_captures = 1 ;
if (! chip->can_capture)
num_captures = 0 ;
err = snd_pcm_new(chip->card, chip->card->driver, 0 , 1 , num_captures, &pcm);
if (err < 0 )
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
if (chip->can_capture)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
pcm->private_data = chip;
pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
strscpy(pcm->name, chip->card->shortname);
chip->pcm = pcm;
chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
if (chip->can_byte_swap)
chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
chip->playback.cur_formats = chip->formats_ok;
chip->capture.cur_formats = chip->formats_ok;
chip->playback.cur_freqs = chip->freqs_ok;
chip->capture.cur_freqs = chip->freqs_ok;
/* preallocate 64k buffer */
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
&chip->pdev->dev,
64 * 1024 , 64 * 1024 );
return 0 ;
}
static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
{
out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16 );
snd_pmac_wait_ack(&chip->playback);
out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16 );
snd_pmac_wait_ack(&chip->capture);
}
/*
* handling beep
*/
void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
{
struct pmac_stream *rec = &chip->playback;
snd_pmac_dma_stop(rec);
chip->extra_dma.cmds->req_count = cpu_to_le16(bytes);
chip->extra_dma.cmds->xfer_status = cpu_to_le16(0 );
chip->extra_dma.cmds->cmd_dep = cpu_to_le32(chip->extra_dma.addr);
chip->extra_dma.cmds->phy_addr = cpu_to_le32(addr);
chip->extra_dma.cmds->command = cpu_to_le16(OUTPUT_MORE | BR_ALWAYS);
out_le32(&chip->awacs->control,
(in_le32(&chip->awacs->control) & ~0 x1f00)
| (speed << 8 ));
out_le32(&chip->awacs->byteswap, 0 );
snd_pmac_dma_set_command(rec, &chip->extra_dma);
snd_pmac_dma_run(rec, RUN);
}
void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
{
snd_pmac_dma_stop(&chip->playback);
chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
snd_pmac_pcm_set_format(chip); /* reset format */
}
/*
* interrupt handlers
*/
static irqreturn_t
snd_pmac_tx_intr(int irq, void *devid)
{
struct snd_pmac *chip = devid;
snd_pmac_pcm_update(chip, &chip->playback);
return IRQ_HANDLED;
}
static irqreturn_t
snd_pmac_rx_intr(int irq, void *devid)
{
struct snd_pmac *chip = devid;
snd_pmac_pcm_update(chip, &chip->capture);
return IRQ_HANDLED;
}
static irqreturn_t
snd_pmac_ctrl_intr(int irq, void *devid)
{
struct snd_pmac *chip = devid;
int ctrl = in_le32(&chip->awacs->control);
if (ctrl & MASK_PORTCHG) {
/* do something when headphone is plugged/unplugged? */
if (chip->update_automute)
chip->update_automute(chip, 1 );
}
if (ctrl & MASK_CNTLERR) {
int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16 ;
if (err && chip->model <= PMAC_SCREAMER)
dev_dbg(chip->card->dev, "%s: error %x\n" , __func__, err);
}
/* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
out_le32(&chip->awacs->control, ctrl);
return IRQ_HANDLED;
}
/*
* a wrapper to feature call for compatibility
*/
static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
{
if (ppc_md.feature_call)
ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0 , enable);
}
/*
* release resources
*/
static int snd_pmac_free(struct snd_pmac *chip)
{
/* stop sounds */
if (chip->initialized) {
snd_pmac_dbdma_reset(chip);
/* disable interrupts from awacs interface */
out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0 xfff);
}
if (chip->node)
snd_pmac_sound_feature(chip, 0 );
/* clean up mixer if any */
if (chip->mixer_free)
chip->mixer_free(chip);
snd_pmac_detach_beep(chip);
/* release resources */
if (chip->irq >= 0 )
free_irq(chip->irq, (void *)chip);
if (chip->tx_irq >= 0 )
free_irq(chip->tx_irq, (void *)chip);
if (chip->rx_irq >= 0 )
free_irq(chip->rx_irq, (void *)chip);
snd_pmac_dbdma_free(chip, &chip->playback.cmd);
snd_pmac_dbdma_free(chip, &chip->capture.cmd);
snd_pmac_dbdma_free(chip, &chip->extra_dma);
snd_pmac_dbdma_free(chip, &emergency_dbdma);
iounmap(chip->macio_base);
iounmap(chip->latch_base);
iounmap(chip->awacs);
iounmap(chip->playback.dma);
iounmap(chip->capture.dma);
if (chip->node) {
int i;
for (i = 0 ; i < 3 ; i++) {
if (chip->requested & (1 << i))
release_mem_region(chip->rsrc[i].start,
resource_size(&chip->rsrc[i]));
}
}
pci_dev_put(chip->pdev);
of_node_put(chip->node);
kfree(chip);
return 0 ;
}
/*
* free the device
*/
static int snd_pmac_dev_free(struct snd_device *device)
{
struct snd_pmac *chip = device->device_data;
return snd_pmac_free(chip);
}
/*
* check the machine support byteswap ( little - endian )
*/
static void detect_byte_swap(struct snd_pmac *chip)
{
struct device_node *mio;
/* if seems that Keylargo can't byte-swap */
for (mio = chip->node->parent; mio; mio = mio->parent) {
if (of_node_name_eq(mio, "mac-io" )) {
if (of_device_is_compatible(mio, "Keylargo" ))
chip->can_byte_swap = 0 ;
break ;
}
}
/* it seems the Pismo & iBook can't byte-swap in hardware. */
if (of_machine_is_compatible("PowerBook3,1" ) ||
of_machine_is_compatible("PowerBook2,1" ))
chip->can_byte_swap = 0 ;
if (of_machine_is_compatible("PowerBook2,1" ))
chip->can_duplex = 0 ;
}
/*
* detect a sound chip
*/
static int snd_pmac_detect(struct snd_pmac *chip)
{
struct device_node *sound;
struct device_node *dn;
const unsigned int *prop;
unsigned int l;
struct macio_chip* macio;
if (!machine_is(powermac))
return -ENODEV;
chip->subframe = 0 ;
chip->revision = 0 ;
chip->freqs_ok = 0 xff; /* all ok */
chip->model = PMAC_AWACS;
chip->can_byte_swap = 1 ;
chip->can_duplex = 1 ;
chip->can_capture = 1 ;
chip->num_freqs = ARRAY_SIZE(awacs_freqs);
chip->freq_table = awacs_freqs;
chip->pdev = NULL;
chip->control_mask = MASK_IEPC | MASK_IEE | 0 x11; /* default */
/* check machine type */
if (of_machine_is_compatible("AAPL,3400/2400" )
|| of_machine_is_compatible("AAPL,3500" ))
chip->is_pbook_3400 = 1 ;
else if (of_machine_is_compatible("PowerBook1,1" )
|| of_machine_is_compatible("AAPL,PowerBook1998" ))
chip->is_pbook_G3 = 1 ;
chip->node = of_find_node_by_name(NULL, "awacs" );
sound = of_node_get(chip->node);
/*
* powermac G3 models have a node called " davbus "
* with a child called " sound " .
*/
if (!chip->node)
chip->node = of_find_node_by_name(NULL, "davbus" );
/*
* if we didn ' t find a davbus device , try ' i2s - a ' since
* this seems to be what iBooks have
*/
if (! chip->node) {
chip->node = of_find_node_by_name(NULL, "i2s-a" );
if (chip->node && chip->node->parent &&
chip->node->parent->parent) {
if (of_device_is_compatible(chip->node->parent->parent,
"K2-Keylargo" ))
chip->is_k2 = 1 ;
}
}
if (! chip->node)
return -ENODEV;
if (!sound) {
for_each_node_by_name(sound, "sound" )
if (sound->parent == chip->node)
break ;
}
if (! sound) {
of_node_put(chip->node);
chip->node = NULL;
return -ENODEV;
}
prop = of_get_property(sound, "sub-frame" , NULL);
if (prop && *prop < 16 )
chip->subframe = *prop;
prop = of_get_property(sound, "layout-id" , NULL);
if (prop) {
/* partly deprecate snd-powermac, for those machines
* that have a layout-id property for now */
dev_info(chip->card->dev,
"snd-powermac no longer handles any machines with a layout-id property in the device-tree, use snd-aoa.\n" );
of_node_put(sound);
of_node_put(chip->node);
chip->node = NULL;
return -ENODEV;
}
/* This should be verified on older screamers */
if (of_device_is_compatible(sound, "screamer" )) {
chip->model = PMAC_SCREAMER;
// chip->can_byte_swap = 0; /* FIXME: check this */
}
if (of_device_is_compatible(sound, "burgundy" )) {
chip->model = PMAC_BURGUNDY;
chip->control_mask = MASK_IEPC | 0 x11; /* disable IEE */
}
if (of_device_is_compatible(sound, "daca" )) {
chip->model = PMAC_DACA;
chip->can_capture = 0 ; /* no capture */
chip->can_duplex = 0 ;
// chip->can_byte_swap = 0; /* FIXME: check this */
chip->control_mask = MASK_IEPC | 0 x11; /* disable IEE */
}
if (of_device_is_compatible(sound, "tumbler" )) {
chip->model = PMAC_TUMBLER;
chip->can_capture = of_machine_is_compatible("PowerMac4,2" )
|| of_machine_is_compatible("PowerBook3,2" )
|| of_machine_is_compatible("PowerBook3,3" )
|| of_machine_is_compatible("PowerBook4,1" )
|| of_machine_is_compatible("PowerBook4,2" )
|| of_machine_is_compatible("PowerBook4,3" );
chip->can_duplex = 0 ;
// chip->can_byte_swap = 0; /* FIXME: check this */
chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
chip->freq_table = tumbler_freqs;
chip->control_mask = MASK_IEPC | 0 x11; /* disable IEE */
}
if (of_device_is_compatible(sound, "snapper" )) {
chip->model = PMAC_SNAPPER;
// chip->can_byte_swap = 0; /* FIXME: check this */
chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
chip->freq_table = tumbler_freqs;
chip->control_mask = MASK_IEPC | 0 x11; /* disable IEE */
}
prop = of_get_property(sound, "device-id" , NULL);
if (prop)
chip->device_id = *prop;
dn = of_find_node_by_name(NULL, "perch" );
chip->has_iic = (dn != NULL);
of_node_put(dn);
/* We need the PCI device for DMA allocations, let's use a crude method
* for now . . .
*/
macio = macio_find(chip->node, macio_unknown);
if (macio == NULL)
dev_warn(chip->card->dev, "snd-powermac: can't locate macio !\n" );
else {
struct pci_dev *pdev = NULL;
for_each_pci_dev(pdev) {
struct device_node *np = pci_device_to_OF_node(pdev);
if (np && np == macio->of_node) {
chip->pdev = pdev;
break ;
}
}
}
if (chip->pdev == NULL)
dev_warn(chip->card->dev,
"snd-powermac: can't locate macio PCI device !\n" );
detect_byte_swap(chip);
/* look for a property saying what sample rates
are available */
prop = of_get_property(sound, "sample-rates" , &l);
if (! prop)
prop = of_get_property(sound, "output-frame-rates" , &l);
if (prop) {
int i;
chip->freqs_ok = 0 ;
for (l /= sizeof (int ); l > 0 ; --l) {
unsigned int r = *prop++;
/* Apple 'Fixed' format */
if (r >= 0 x10000)
r >>= 16 ;
for (i = 0 ; i < chip->num_freqs; ++i) {
if (r == chip->freq_table[i]) {
chip->freqs_ok |= (1 << i);
break ;
}
}
}
} else {
/* assume only 44.1khz */
chip->freqs_ok = 1 ;
}
of_node_put(sound);
return 0 ;
}
#ifdef PMAC_SUPPORT_AUTOMUTE
/*
* auto - mute
*/
static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
ucontrol->value.integer.value[0 ] = chip->auto_mute;
return 0 ;
}
static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
if (ucontrol->value.integer.value[0 ] != chip->auto_mute) {
chip->auto_mute = !!ucontrol->value.integer.value[0 ];
if (chip->update_automute)
chip->update_automute(chip, 1 );
return 1 ;
}
return 0 ;
}
static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
if (chip->detect_headphone)
ucontrol->value.integer.value[0 ] = chip->detect_headphone(chip);
else
ucontrol->value.integer.value[0 ] = 0 ;
return 0 ;
}
static const struct snd_kcontrol_new auto_mute_controls[] = {
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Auto Mute Switch" ,
.info = snd_pmac_boolean_mono_info,
.get = pmac_auto_mute_get,
.put = pmac_auto_mute_put,
},
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Headphone Detection" ,
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.info = snd_pmac_boolean_mono_info,
.get = pmac_hp_detect_get,
},
};
int snd_pmac_add_automute(struct snd_pmac *chip)
{
int err;
chip->auto_mute = 1 ;
err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0 ], chip));
if (err < 0 ) {
dev_err(chip->card->dev,
"snd-powermac: Failed to add automute control\n" );
return err;
}
chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1 ], chip);
return snd_ctl_add(chip->card, chip->hp_detect_ctl);
}
#endif /* PMAC_SUPPORT_AUTOMUTE */
/*
* create and detect a pmac chip record
*/
int snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
{
struct snd_pmac *chip;
struct device_node *np;
int i, err;
unsigned int irq;
unsigned long ctrl_addr, txdma_addr, rxdma_addr;
static const struct snd_device_ops ops = {
.dev_free = snd_pmac_dev_free,
};
*chip_return = NULL;
chip = kzalloc(sizeof (*chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
chip->card = card;
spin_lock_init(&chip->reg_lock);
chip->irq = chip->tx_irq = chip->rx_irq = -1 ;
chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
err = snd_pmac_detect(chip);
if (err < 0 )
goto __error;
if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1 ) < 0 ||
snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1 ) < 0 ||
snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2 ) < 0 ||
snd_pmac_dbdma_alloc(chip, &emergency_dbdma, 2 ) < 0 ) {
err = -ENOMEM;
goto __error;
}
np = chip->node;
chip->requested = 0 ;
if (chip->is_k2) {
static const char * const rnames[] = {
"Sound Control" , "Sound DMA" };
for (i = 0 ; i < 2 ; i ++) {
if (of_address_to_resource(np->parent, i,
&chip->rsrc[i])) {
dev_err(chip->card->dev,
"snd: can't translate rsrc %d (%s)\n" ,
i, rnames[i]);
err = -ENODEV;
goto __error;
}
if (request_mem_region(chip->rsrc[i].start,
resource_size(&chip->rsrc[i]),
rnames[i]) == NULL) {
dev_err(chip->card->dev,
"snd: can't request rsrc %d (%s: %pR)\n" ,
i, rnames[i], &chip->rsrc[i]);
err = -ENODEV;
goto __error;
}
chip->requested |= (1 << i);
}
ctrl_addr = chip->rsrc[0 ].start;
txdma_addr = chip->rsrc[1 ].start;
rxdma_addr = txdma_addr + 0 x100;
} else {
static const char * const rnames[] = {
"Sound Control" , "Sound Tx DMA" , "Sound Rx DMA" };
for (i = 0 ; i < 3 ; i ++) {
if (of_address_to_resource(np, i,
&chip->rsrc[i])) {
dev_err(chip->card->dev,
"snd: can't translate rsrc %d (%s)\n" ,
i, rnames[i]);
err = -ENODEV;
goto __error;
}
if (request_mem_region(chip->rsrc[i].start,
resource_size(&chip->rsrc[i]),
rnames[i]) == NULL) {
dev_err(chip->card->dev,
"snd: can't request rsrc %d (%s: %pR)\n" ,
i, rnames[i], &chip->rsrc[i]);
err = -ENODEV;
goto __error;
}
chip->requested |= (1 << i);
}
ctrl_addr = chip->rsrc[0 ].start;
txdma_addr = chip->rsrc[1 ].start;
rxdma_addr = chip->rsrc[2 ].start;
}
chip->awacs = ioremap(ctrl_addr, 0 x1000);
chip->playback.dma = ioremap(txdma_addr, 0 x100);
chip->capture.dma = ioremap(rxdma_addr, 0 x100);
if (chip->model <= PMAC_BURGUNDY) {
irq = irq_of_parse_and_map(np, 0 );
if (request_irq(irq, snd_pmac_ctrl_intr, 0 ,
"PMac" , (void *)chip)) {
dev_err(chip->card->dev,
"pmac: unable to grab IRQ %d\n" , irq);
err = -EBUSY;
goto __error;
}
chip->irq = irq;
}
irq = irq_of_parse_and_map(np, 1 );
if (request_irq(irq, snd_pmac_tx_intr, 0 , "PMac Output" , (void *)chip)){
dev_err(chip->card->dev, "pmac: unable to grab IRQ %d\n" , irq);
err = -EBUSY;
goto __error;
}
chip->tx_irq = irq;
irq = irq_of_parse_and_map(np, 2 );
if (request_irq(irq, snd_pmac_rx_intr, 0 , "PMac Input" , (void *)chip)) {
dev_err(chip->card->dev, "pmac: unable to grab IRQ %d\n" , irq);
err = -EBUSY;
goto __error;
}
chip->rx_irq = irq;
snd_pmac_sound_feature(chip, 1 );
/* reset & enable interrupts */
if (chip->model <= PMAC_BURGUNDY)
out_le32(&chip->awacs->control, chip->control_mask);
/* Powerbooks have odd ways of enabling inputs such as
an expansion - bay CD or sound from an internal modem
or a PC-card modem. */
if (chip->is_pbook_3400) {
/* Enable CD and PC-card sound inputs. */
/* This is done by reading from address
* f301a000 , + 0 x10 to enable the expansion - bay
* CD sound input , + 0 x80 to enable the PC - card
* sound input . The 0 x100 enables the SCSI bus
* terminator power .
*/
chip->latch_base = ioremap (0 xf301a000, 0 x1000);
in_8(chip->latch_base + 0 x190);
} else if (chip->is_pbook_G3) {
struct device_node* mio;
for (mio = chip->node->parent; mio; mio = mio->parent) {
if (of_node_name_eq(mio, "mac-io" )) {
struct resource r;
if (of_address_to_resource(mio, 0 , &r) == 0 )
chip->macio_base =
ioremap(r.start, 0 x40);
break ;
}
}
/* Enable CD sound input. */
/* The relevant bits for writing to this byte are 0x8f.
* I haven ' t found out what the 0 x80 bit does .
* For the 0 xf bits , writing 3 or 7 enables the CD
* input , any other value disables it . Values
* 1 , 3 , 5 , 7 enable the microphone . Values 0 , 2 ,
* 4 , 6 , 8 - f enable the input from the modem .
*/
if (chip->macio_base)
out_8(chip->macio_base + 0 x37, 3 );
}
/* Reset dbdma channels */
snd_pmac_dbdma_reset(chip);
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
if (err < 0 )
goto __error;
*chip_return = chip;
return 0 ;
__error:
snd_pmac_free(chip);
return err;
}
/*
* sleep notify for powerbook
*/
#ifdef CONFIG_PM
/*
* Save state when going to sleep , restore it afterwards .
*/
void snd_pmac_suspend(struct snd_pmac *chip)
{
unsigned long flags;
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
if (chip->suspend)
chip->suspend(chip);
spin_lock_irqsave(&chip->reg_lock, flags);
snd_pmac_beep_stop(chip);
spin_unlock_irqrestore(&chip->reg_lock, flags);
if (chip->irq >= 0 )
disable_irq(chip->irq);
if (chip->tx_irq >= 0 )
disable_irq(chip->tx_irq);
if (chip->rx_irq >= 0 )
disable_irq(chip->rx_irq);
snd_pmac_sound_feature(chip, 0 );
}
void snd_pmac_resume(struct snd_pmac *chip)
{
snd_pmac_sound_feature(chip, 1 );
if (chip->resume)
chip->resume(chip);
/* enable CD sound input */
if (chip->macio_base && chip->is_pbook_G3)
out_8(chip->macio_base + 0 x37, 3 );
else if (chip->is_pbook_3400)
in_8(chip->latch_base + 0 x190);
snd_pmac_pcm_set_format(chip);
if (chip->irq >= 0 )
enable_irq(chip->irq);
if (chip->tx_irq >= 0 )
enable_irq(chip->tx_irq);
if (chip->rx_irq >= 0 )
enable_irq(chip->rx_irq);
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
}
#endif /* CONFIG_PM */
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