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Subject[TESTING-PATCH] PM support for opl3sa2.c #2
Diffed against 2.4.17-pre2 and 2.5.1-pre5

--- linux-2.5.0/drivers/sound/opl3sa2.c Wed Dec 5 11:16:35 2001
+++ linux-2.5.0-test/drivers/sound/opl3sa2.c Wed Dec 5 11:17:07 2001
@@ -55,6 +55,7 @@
* sb_card.c and awe_wave.c. (Dec 12, 2000)
* Scott Murray Some small cleanups to the init code output.
* (Jan 7, 2001)
+ * Zwane Mwaikambo Added PM support. (Dec 4 2001)
*
*/

@@ -62,7 +63,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/isapnp.h>
-
+#include <linux/pm.h>
#include "sound_config.h"

#include "ad1848.h"
@@ -86,6 +87,11 @@
#define DEFAULT_MIC 50
#define DEFAULT_TIMBRE 0

+/* Power saving modes */
+#define OPL3SA2_PM_MODE1 0x05
+#define OPL3SA2_PM_MODE2 0x04
+#define OPL3SA2_PM_MODE3 0x03
+
/* For checking against what the card returns: */
#define VERSION_UNKNOWN 0
#define VERSION_YMF711 1
@@ -121,6 +127,9 @@
typedef struct opl3sa2_mixerdata_tag {
unsigned short cfg_port;
unsigned short padding;
+ unsigned char reg;
+ unsigned int in_suspend;
+ struct pm_dev *pmdev;
unsigned int volume_l;
unsigned int volume_r;
unsigned int mic;
@@ -892,6 +901,79 @@

/* End of component functions */

+/* Power Management support functions */
+static int opl3sa2_suspend(struct pm_dev *pdev, unsigned char pm_mode)
+{
+ unsigned long flags;
+ opl3sa2_mixerdata *p;
+
+ if (!pdev)
+ return -EINVAL;
+
+ save_flags(flags);
+ cli();
+
+ p = (opl3sa2_mixerdata *) pdev->data;
+ p->in_suspend = 1;
+ switch (pm_mode) {
+ case 1:
+ pm_mode = OPL3SA2_PM_MODE1;
+ break;
+ case 2:
+ pm_mode = OPL3SA2_PM_MODE2;
+ break;
+ case 3:
+ pm_mode = OPL3SA2_PM_MODE3;
+ break;
+ default:
+ pm_mode = OPL3SA2_PM_MODE3;
+ break;
+ }
+
+ opl3sa2_read(p->cfg_port, OPL3SA2_SYS_CTRL, &p->reg);
+ opl3sa2_write(p->cfg_port, OPL3SA2_SYS_CTRL, p->reg | pm_mode);
+
+ restore_flags(flags);
+ return 0;
+}
+
+static int opl3sa2_resume(struct pm_dev *pdev)
+{
+ unsigned long flags;
+ opl3sa2_mixerdata *p;
+
+ if (!pdev)
+ return -EINVAL;
+
+ p = (opl3sa2_mixerdata *) pdev->data;
+ save_flags(flags);
+ cli();
+
+ /* I don't think this is necessary */
+ opl3sa2_write(p->cfg_port, OPL3SA2_SYS_CTRL, p->reg);
+ p->in_suspend = 0;
+
+ /* The volume is muted on suspend, but ad1848 seems to handle the
+ * restoring of mixer levels.
+ */
+
+ restore_flags(flags);
+ return 0;
+}
+
+static int opl3sa2_pm_callback(struct pm_dev *pdev, pm_request_t rqst, void *data)
+{
+ unsigned char mode = (unsigned char)data;
+
+ switch (rqst) {
+ case PM_SUSPEND:
+ return opl3sa2_suspend(pdev, mode);
+
+ case PM_RESUME:
+ return opl3sa2_resume(pdev);
+ }
+ return 0;
+}

/*
* Install OPL3-SA2 based card(s).
@@ -980,7 +1062,7 @@
" of the ISA PNP cards, continuing\n");
opl3sa2_cards_num--;
continue;
- } else
+ } else
return -ENODEV;
}

@@ -989,6 +1071,11 @@
attach_opl3sa2_mss(&cfg_mss[card]);
attach_opl3sa2_mixer(&cfg[card], card);

+ /* register our power management capabilities */
+ opl3sa2_data[card].pmdev = pm_register(PM_ISA_DEV, card, opl3sa2_pm_callback);
+ if (opl3sa2_data[card].pmdev)
+ opl3sa2_data[card].pmdev->data = &opl3sa2_data[card];
+
/*
* Set the Yamaha 3D enhancement mode (aka Ymersion) if asked to and
* it's supported.
@@ -1033,6 +1120,8 @@
int card;

for(card = 0; card < opl3sa2_cards_num; card++) {
+ if (opl3sa2_data[card].pmdev)
+ pm_unregister(opl3sa2_data[card].pmdev);
if(cfg_mpu[card].slots[1] != -1) {
unload_opl3sa2_mpu(&cfg_mpu[card]);
}
-
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