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[ALSA] ad1848 - Add PM support

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Modules: AD1848 driver

Add PM support to ad1848 support code.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2005-11-17 16:57:48 +01:00 committed by Jaroslav Kysela
parent 7a8fef1f95
commit c66d7f7256
2 changed files with 20 additions and 13 deletions
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5
include/sound/ad1848.h
View File

@ -148,6 +148,11 @@ struct snd_ad1848 {
int dma_size;
int thinkpad_flag; /* Thinkpad CS4248 needs some extra help */
#ifdef CONFIG_PM
void (*suspend)(struct snd_ad1848 *chip);
void (*resume)(struct snd_ad1848 *chip);
#endif
spinlock_t reg_lock;
struct semaphore open_mutex;
};

28
sound/isa/ad1848/ad1848_lib.c
View File

@ -24,7 +24,6 @@
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <sound/core.h>
@ -642,29 +641,30 @@ static void snd_ad1848_thinkpad_twiddle(struct snd_ad1848 *chip, int on) {
}
#ifdef CONFIG_PM
static int snd_ad1848_suspend(struct snd_card *card, pm_message_t state)
static void snd_ad1848_suspend(struct snd_ad1848 *chip)
{
struct snd_ad1848 *chip = card->pm_private_data;
snd_pcm_suspend_all(chip->pcm);
/* FIXME: save registers? */
if (chip->thinkpad_flag)
snd_ad1848_thinkpad_twiddle(chip, 0);
return 0;
}
static int snd_ad1848_resume(struct snd_card *card)
static void snd_ad1848_resume(struct snd_ad1848 *chip)
{
struct snd_ad1848 *chip = card->pm_private_data;
int i;
if (chip->thinkpad_flag)
snd_ad1848_thinkpad_twiddle(chip, 1);
/* FIXME: restore registers? */
/* clear any pendings IRQ */
inb(AD1848P(chip, STATUS));
outb(0, AD1848P(chip, STATUS));
mb();
return 0;
snd_ad1848_mce_down(chip);
for (i = 0; i < 16; i++)
snd_ad1848_out(chip, i, chip->image[i]);
snd_ad1848_mce_up(chip);
snd_ad1848_mce_down(chip);
}
#endif /* CONFIG_PM */
@ -919,7 +919,6 @@ int snd_ad1848_create(struct snd_card *card,
chip->thinkpad_flag = 1;
chip->hardware = AD1848_HW_DETECT; /* reset */
snd_ad1848_thinkpad_twiddle(chip, 1);
snd_card_set_isa_pm_callback(card, snd_ad1848_suspend, snd_ad1848_resume, chip);
}
if (snd_ad1848_probe(chip) < 0) {
@ -933,6 +932,9 @@ int snd_ad1848_create(struct snd_card *card,
return err;
}
chip->suspend = snd_ad1848_suspend;
chip->resume = snd_ad1848_resume;
*rchip = chip;
return 0;
}