#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
-#include <sound/driver.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/info.h>
#include <asm/io.h>
#include <asm/dma.h>
-#include <asm/dreamcast/sysasic.h>
+#include <mach/sysasic.h>
#include "aica.h"
MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
/* Use workqueue */
-
-static struct spu_work_holder {
- struct work_struct spu_dma_work;
- void *sspointer;
-} spu_working;
-
static struct workqueue_struct *aica_queue;
/* Simple platform device */
break;
/* To ensure hardware failure doesn't wedge kernel */
time_count++;
- if (time_count > 0x10000)
- {
- snd_printk("WARNING: G2 FIFO appears to be blocked.\n");
+ if (time_count > 0x10000) {
+ snd_printk
+ ("WARNING: G2 FIFO appears to be blocked.\n");
break;
}
}
static void spu_memset(u32 toi, u32 what, int length)
{
int i;
- snd_assert(length % 4 == 0, return);
+ unsigned long flags;
+ if (snd_BUG_ON(length % 4))
+ return;
for (i = 0; i < length; i++) {
if (!(i % 8))
spu_write_wait();
+ local_irq_save(flags);
writel(what, toi + SPU_MEMORY_BASE);
+ local_irq_restore(flags);
toi++;
}
}
/* spu_memload - write to SPU address space */
static void spu_memload(u32 toi, void *from, int length)
{
+ unsigned long flags;
u32 *froml = from;
u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
int i;
if (!(i % 8))
spu_write_wait();
val = *froml;
+ local_irq_save(flags);
writel(val, to);
+ local_irq_restore(flags);
froml++;
to++;
}
static void spu_disable(void)
{
int i;
+ unsigned long flags;
u32 regval;
spu_write_wait();
regval = readl(ARM_RESET_REGISTER);
regval |= 1;
spu_write_wait();
+ local_irq_save(flags);
writel(regval, ARM_RESET_REGISTER);
+ local_irq_restore(flags);
for (i = 0; i < 64; i++) {
spu_write_wait();
regval = readl(SPU_REGISTER_BASE + (i * 0x80));
regval = (regval & ~0x4000) | 0x8000;
spu_write_wait();
+ local_irq_save(flags);
writel(regval, SPU_REGISTER_BASE + (i * 0x80));
+ local_irq_restore(flags);
}
}
/* spu_enable - set spu registers to enable sound output */
static void spu_enable(void)
{
+ unsigned long flags;
u32 regval = readl(ARM_RESET_REGISTER);
regval &= ~1;
spu_write_wait();
+ local_irq_save(flags);
writel(regval, ARM_RESET_REGISTER);
+ local_irq_restore(flags);
}
/*
*/
static void spu_reset(void)
{
+ unsigned long flags;
spu_disable();
spu_memset(0, 0, 0x200000 / 4);
/* Put ARM7 in endless loop */
+ local_irq_save(flags);
ctrl_outl(0xea000002, SPU_MEMORY_BASE);
+ local_irq_restore(flags);
spu_enable();
}
/* aica_chn_start - write to spu to start playback */
static void aica_chn_start(void)
{
+ unsigned long flags;
spu_write_wait();
+ local_irq_save(flags);
writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
+ local_irq_restore(flags);
}
/* aica_chn_halt - write to spu to halt playback */
static void aica_chn_halt(void)
{
+ unsigned long flags;
spu_write_wait();
+ local_irq_save(flags);
writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
+ local_irq_restore(flags);
}
/* ALSA code below */
int q, err, period_offset;
struct snd_card_aica *dreamcastcard;
struct snd_pcm_runtime *runtime;
+ unsigned long flags;
err = 0;
dreamcastcard = substream->pcm->private_data;
period_offset = dreamcastcard->clicks;
period_offset %= (AICA_PERIOD_NUMBER / channels);
runtime = substream->runtime;
for (q = 0; q < channels; q++) {
+ local_irq_save(flags);
err = dma_xfer(AICA_DMA_CHANNEL,
- (unsigned long)(runtime->dma_area +
- (AICA_BUFFER_SIZE * q) /
- channels +
- AICA_PERIOD_SIZE *
- period_offset),
+ (unsigned long) (runtime->dma_area +
+ (AICA_BUFFER_SIZE * q) /
+ channels +
+ AICA_PERIOD_SIZE *
+ period_offset),
AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
AICA_PERIOD_SIZE * period_offset,
buffer_size / channels, AICA_DMA_MODE);
- if (unlikely(err < 0))
+ if (unlikely(err < 0)) {
+ local_irq_restore(flags);
break;
+ }
dma_wait_for_completion(AICA_DMA_CHANNEL);
+ local_irq_restore(flags);
}
return err;
}
static void startup_aica(struct snd_card_aica *dreamcastcard)
{
spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
- dreamcastcard->channel,
- sizeof(struct aica_channel));
+ dreamcastcard->channel, sizeof(struct aica_channel));
aica_chn_start();
}
static void run_spu_dma(struct work_struct *work)
{
int buffer_size;
- struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
struct snd_card_aica *dreamcastcard;
- struct spu_work_holder *holder = container_of(work, struct spu_work_holder, spu_dma_work);
- substream = holder-> sspointer;
- dreamcastcard = substream->pcm->private_data;
- runtime = substream->runtime;
+ dreamcastcard =
+ container_of(work, struct snd_card_aica, spu_dma_work);
+ runtime = dreamcastcard->substream->runtime;
if (unlikely(dreamcastcard->dma_check == 0)) {
- buffer_size = frames_to_bytes(runtime, runtime->buffer_size);
+ buffer_size =
+ frames_to_bytes(runtime, runtime->buffer_size);
if (runtime->channels > 1)
dreamcastcard->channel->flags |= 0x01;
- aica_dma_transfer(runtime->channels, buffer_size, substream);
+ aica_dma_transfer(runtime->channels, buffer_size,
+ dreamcastcard->substream);
startup_aica(dreamcastcard);
dreamcastcard->clicks =
buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
} else {
aica_dma_transfer(runtime->channels,
AICA_PERIOD_SIZE * runtime->channels,
- substream);
+ dreamcastcard->substream);
snd_pcm_period_elapsed(dreamcastcard->substream);
dreamcastcard->clicks++;
if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
- {
dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
- }
mod_timer(&dreamcastcard->timer, jiffies + 1);
}
}
struct snd_pcm_runtime *runtime;
struct snd_pcm_substream *substream;
struct snd_card_aica *dreamcastcard;
- substream = (struct snd_pcm_substream *)timer_var;
+ substream = (struct snd_pcm_substream *) timer_var;
runtime = substream->runtime;
dreamcastcard = substream->pcm->private_data;
/* Have we played out an additional period? */
dreamcastcard->current_period = play_period;
if (unlikely(dreamcastcard->dma_check == 0))
dreamcastcard->dma_check = 1;
- queue_work(aica_queue, &(spu_working.spu_dma_work));
+ queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
}
static void spu_begin_dma(struct snd_pcm_substream *substream)
{
- /* Must be atomic */
struct snd_card_aica *dreamcastcard;
struct snd_pcm_runtime *runtime;
runtime = substream->runtime;
dreamcastcard = substream->pcm->private_data;
- /* Use queue to do the heavy lifting */
- spu_working.sspointer = substream;
- INIT_WORK(&(spu_working.spu_dma_work), run_spu_dma);
- queue_work(aica_queue, &(spu_working.spu_dma_work));
+ /*get the queue to do the work */
+ queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
/* Timer may already be running */
if (unlikely(dreamcastcard->timer.data)) {
mod_timer(&dreamcastcard->timer, jiffies + 4);
return;
}
init_timer(&(dreamcastcard->timer));
- dreamcastcard->timer.data = (unsigned long)substream;
+ dreamcastcard->timer.data = (unsigned long) substream;
dreamcastcard->timer.function = aica_period_elapsed;
dreamcastcard->timer.expires = jiffies + 4;
add_timer(&(dreamcastcard->timer));
*substream)
{
struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
- del_timer(&dreamcastcard->timer);
+ flush_workqueue(aica_queue);
+ if (dreamcastcard->timer.data)
+ del_timer(&dreamcastcard->timer);
kfree(dreamcastcard->channel);
spu_disable();
return 0;
{
/* Allocate a DMA buffer using ALSA built-ins */
return
- snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+ snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
}
static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
*substream, int cmd)
{
- struct snd_card_aica *dreamcastcard;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
spu_begin_dma(substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
- dreamcastcard = substream->pcm->private_data;
- if (dreamcastcard->timer.data)
- del_timer(&dreamcastcard->timer);
aica_chn_halt();
break;
default:
int err;
/* AICA has no capture ability */
err =
- snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0, &pcm);
+ snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0,
+ &pcm);
if (unlikely(err < 0))
return err;
pcm->private_data = dreamcastcard;
}
/* Mixer controls */
-static int aica_pcmswitch_info(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *uinfo)
-{
- uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
- uinfo->count = 1;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = 1;
- return 0;
-}
+#define aica_pcmswitch_info snd_ctl_boolean_mono_info
static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
struct snd_ctl_elem_value *ucontrol)
{
struct snd_card_aica *dreamcastcard;
+ unsigned int vol;
dreamcastcard = kcontrol->private_data;
if (unlikely(!dreamcastcard->channel))
return -ETXTBSY;
- if (unlikely(dreamcastcard->channel->vol ==
- ucontrol->value.integer.value[0]))
+ vol = ucontrol->value.integer.value[0];
+ if (vol > 0xff)
+ return -EINVAL;
+ if (unlikely(dreamcastcard->channel->vol == vol))
return 0;
dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
dreamcastcard->master_volume = ucontrol->value.integer.value[0];
spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
- dreamcastcard->channel,
- sizeof(struct aica_channel));
-
+ dreamcastcard->channel, sizeof(struct aica_channel));
return 1;
}
return 0;
}
-static int snd_aica_remove(struct platform_device *devptr)
+static int __devexit snd_aica_remove(struct platform_device *devptr)
{
struct snd_card_aica *dreamcastcard;
dreamcastcard = platform_get_drvdata(devptr);
return 0;
}
-static int __init snd_aica_probe(struct platform_device *devptr)
+static int __devinit snd_aica_probe(struct platform_device *devptr)
{
int err;
struct snd_card_aica *dreamcastcard;
strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
strcpy(dreamcastcard->card->longname,
"Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
+ /* Prepare to use the queue */
+ INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
/* Load the PCM 'chip' */
err = snd_aicapcmchip(dreamcastcard, 0);
if (unlikely(err < 0))
static struct platform_driver snd_aica_driver = {
.probe = snd_aica_probe,
- .remove = snd_aica_remove,
+ .remove = __devexit_p(snd_aica_remove),
.driver = {
.name = SND_AICA_DRIVER},
};
return err;
pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
aica_memory_space, 2);
- if (unlikely(IS_ERR(pd))) {
+ if (IS_ERR(pd)) {
platform_driver_unregister(&snd_aica_driver);
return PTR_ERR(pd);
}
static void __exit aica_exit(void)
{
- /* Destroy the aica kernel thread */
- destroy_workqueue(aica_queue);
+ /* Destroy the aica kernel thread *
+ * being extra cautious to check if it exists*/
+ if (likely(aica_queue))
+ destroy_workqueue(aica_queue);
platform_device_unregister(pd);
platform_driver_unregister(&snd_aica_driver);
/* Kill any sound still playing and reset ARM7 to safe state */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff