[ALSA] ad1848 - Add PM support

Modules: AD1848 driver

Add PM support to ad1848 support code.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/include/sound/ad1848.h b/include/sound/ad1848.h
index a03807088b10cf3d09b94068787d3c55cfe7da1d..1a2759f3a292b66d9bbc2f21514cd9a92d23e80a 100644 (file)
--- a/include/sound/ad1848.h
+++ b/include/sound/ad1848.h
@@ -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;
 };

diff --git a/sound/isa/ad1848/ad1848_lib.c b/sound/isa/ad1848/ad1848_lib.c
index 55ba32d4a22e5267e89b090f3b6052668cd85cf5..83764c94153329cbeff04fc136b248d9a8f5f689 100644 (file)
--- a/sound/isa/ad1848/ad1848_lib.c
+++ b/sound/isa/ad1848/ad1848_lib.c
@@ -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;
 }