[ALSA] ad1848 - Add PM support

Modules: AD1848 driver

Add PM support to ad1848 support code.

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

1 files changed, 15 insertions, 13 deletions

diff --git a/sound/isa/ad1848/ad1848_lib.c b/sound/isa/ad1848/ad1848_lib.c
index 55ba32d4a22e..83764c941533 100644
--- 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;
 }