Hi,
Patch to get PM working for es18xx, i tried to use all the
supported cards data sheets as a reference, the common denominator is
suspend mode only, 1879 (perhaps others i dont have sheets for) doesn't
support power down via register 7.
Cheers,
Zwane Mwaikambo
--- linux-2.5-test/sound/isa/es18xx.c.orig Sat Feb 16 06:36:13 2002
+++ linux-2.5-test/sound/isa/es18xx.c Sat Feb 16 09:17:54 2002
@@ -68,6 +68,7 @@
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/init.h>
+#include <linux/pm.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
@@ -116,6 +117,10 @@
spinlock_t reg_lock;
spinlock_t mixer_lock;
spinlock_t ctrl_lock;
+#ifdef CONFIG_PM
+ struct pm_dev *pm_dev;
+ unsigned char pm_reg;
+#endif
};
#define AUDIO1_IRQ 0x01
@@ -136,6 +141,15 @@
#define ES18XX_MUTEREC 0x0400 /* Record source can be muted */
#define ES18XX_CONTROL 0x0800 /* Has control ports */
+/* Power Management */
+#define ES18XX_PM 0x07
+#define ES18XX_PM_GPO0 0x01
+#define ES18XX_PM_GPO1 0x02
+#define ES18XX_PM_PDR 0x03
+#define ES18XX_PM_ANA 0x04
+#define ES18XX_PM_FM 0x06
+#define ES18XX_PM_SUS 0x08
+
typedef struct _snd_es18xx es18xx_t;
#define chip_t es18xx_t
@@ -1587,8 +1601,87 @@
return 0;
}
+/* Power Management support functions */
+#ifdef CONFIG_PM
+static void snd_es18xx_suspend(es18xx_t *chip, int can_schedule)
+{
+ snd_card_t *card = chip->card;
+
+ snd_power_lock(card, can_schedule);
+ if (card->power_state == SNDRV_CTL_POWER_D3hot)
+ goto __skip;
+
+ snd_pcm_suspend_all(chip->pcm);
+
+ /* power down */
+ chip->pm_reg = (unsigned char)snd_es18xx_read(chip, ES18XX_PM);
+ chip->pm_reg |= (ES18XX_PM_FM | ES18XX_PM_SUS);
+ snd_es18xx_write(chip, ES18XX_PM, chip->pm_reg);
+ snd_es18xx_write(chip, ES18XX_PM, chip->pm_reg ^= ES18XX_PM_SUS);
+
+ snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+ __skip:
+ snd_power_unlock(card);
+}
+
+static void snd_es18xx_resume(es18xx_t *chip, int can_schedule)
+{
+ snd_card_t *card = chip->card;
+
+ snd_power_lock(card, can_schedule);
+ if (card->power_state == SNDRV_CTL_POWER_D0)
+ goto __skip;
+
+ /* restore PM register, we won't wake till (not 0x07) i/o activity though */
+ snd_es18xx_write(chip, ES18XX_PM, chip->pm_reg ^= ES18XX_PM_FM);
+
+ snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+ __skip:
+ snd_power_unlock(card);
+}
+
+/* callback for control API */
+static int snd_es18xx_set_power_state(snd_card_t *card, unsigned int power_state)
+{
+ es18xx_t *chip = (es18xx_t *) card->power_state_private_data;
+ switch (power_state) {
+ case SNDRV_CTL_POWER_D0:
+ case SNDRV_CTL_POWER_D1:
+ case SNDRV_CTL_POWER_D2:
+ snd_es18xx_resume(chip, 1);
+ break;
+ case SNDRV_CTL_POWER_D3hot:
+ case SNDRV_CTL_POWER_D3cold:
+ snd_es18xx_suspend(chip, 1);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int snd_es18xx_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
+{
+ es18xx_t *chip = snd_magic_cast(es18xx_t, dev->data, return 0);
+
+ switch (rqst) {
+ case PM_SUSPEND:
+ snd_es18xx_suspend(chip, 0);
+ break;
+ case PM_RESUME:
+ snd_es18xx_resume(chip, 0);
+ break;
+ }
+ return 0;
+}
+#endif /* CONFIG_PM */
+
static int snd_es18xx_free(es18xx_t *chip)
{
+#ifdef CONFIG_PM
+ if (chip->pm_dev)
+ pm_unregister(chip->pm_dev);
+#endif
if (chip->res_port) {
release_resource(chip->res_port);
kfree(chip->res_port);
@@ -2066,6 +2159,17 @@
}
chip->rmidi = rmidi;
}
+
+#ifdef CONFIG_PM
+ /* Power Management */
+ chip->pm_dev = pm_register(PM_ISA_DEV, 0, snd_es18xx_pm_callback);
+ if (chip->pm_dev) {
+ chip->pm_dev->data = chip;
+ /* set control api callback */
+ card->set_power_state = snd_es18xx_set_power_state;
+ card->power_state_private_data = chip;
+ }
+#endif
sprintf(card->driver, "ES%x", chip->version);
sprintf(card->shortname, "ESS AudioDrive ES%x", chip->version);
sprintf(card->longname, "%s at 0x%lx, irq %d, dma1 %d, dma2 %d",
-
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This archive was generated by hypermail 2b29 : Sat Feb 23 2002 - 21:00:10 EST