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SubjectPatch: support for Opti924 PnP
The attached patch adds support for the Opti924
in Plug-n-Play mode.

-aw@mail1.bet1.puv.fi
--- linux/drivers/sound/mad16.c.OLD Sat May 16 18:29:31 1998
+++ linux/drivers/sound/mad16.c Sat May 16 22:42:25 1998
@@ -16,7 +16,7 @@
* OAK OTI-601D Mozart
* OPTi 82C929 MAD16 Pro
* OPTi 82C930
- * OPTi 82C924 (in non PnP mode)
+ * OPTi 82C924
*
* These audio interface chips don't produce sound themselves. They just
* connect some other components (OPL-[234] and a WSS compatible codec)
@@ -60,6 +60,10 @@
* Changes
*
* Alan Cox Clean up, added module selections.
+ *
+ * A. Wik Added support for Opti924 PnP.
+ * Improved debugging support. 16-May-1998
+ *
*/

#include "sound_config.h"
@@ -116,11 +120,14 @@
static int board_type = C928;

static int *mad16_osp;
-static int c931_detected; /* minor diferences from C930 */
+static int c931_detected; /* minor differences from C930 */
+static char c924pnp = 0; /* " " " C924 */
+static int debug = 0; /* debugging output */

-#ifndef DDB
-#define DDB(x)
+#ifdef DDB
+#undef DDB
#endif
+#define DDB(x) {if (debug) x;}

static unsigned char mad_read(int port)
{
@@ -146,7 +153,9 @@
break;

case C924:
- outb((0xE5), PASSWD_REG);
+ if (!c924pnp)
+ outb((0xE5), PASSWD_REG); else
+ outb((0xE5), PASSWD_REG - 0x80);
break;
}

@@ -156,7 +165,9 @@
tmp = inb(0xe0f); /* Read from data reg */
}
else
- tmp = inb(port);
+ if (!c924pnp)
+ tmp = inb(port); else
+ tmp = inb(port-0x80);
restore_flags(flags);

return tmp;
@@ -185,7 +196,9 @@
break;

case C924:
- outb((0xE5), PASSWD_REG);
+ if (!c924pnp)
+ outb((0xE5), PASSWD_REG); else
+ outb((0xE5), PASSWD_REG - 0x80);
break;
}

@@ -195,7 +208,9 @@
outb(((unsigned char) (value & 0xff)), 0xe0f);
}
else
- outb(((unsigned char) (value & 0xff)), port);
+ if (!c924pnp)
+ outb(((unsigned char) (value & 0xff)), port); else
+ outb(((unsigned char) (value & 0xff)), port-0x80);
restore_flags(flags);
}

@@ -288,7 +303,9 @@
return 0;
}
for (i = 0xf8d; i <= 0xf98; i++)
- DDB(printk("Port %0x (init value) = %0x\n", i, mad_read(i)));
+ if (!c924pnp)
+ DDB(printk("Port %0x (init value) = %0x\n", i, mad_read(i))) else
+ DDB(printk("Port %0x (init value) = %0x\n", i-0x80, mad_read(i)));

if (board_type == C930)
return detect_c930();
@@ -431,6 +448,11 @@
board_type = C924;

DDB(printk("Detect using password = 0xE5\n"));
+
+ if (!detect_mad16()) {
+ c924pnp++;
+ DDB(printk("Detect using password = 0xE5 (again), port offset -0x80\n"));
+ }

if (!detect_mad16()) /* No luck. Try different model */
{
@@ -523,7 +545,9 @@


for (i = 0xf8d; i <= 0xf93; i++)
- DDB(printk("port %03x = %02x\n", i, mad_read(i)));
+ if (!c924pnp)
+ DDB(printk("port %03x = %02x\n", i, mad_read(i))) else
+ DDB(printk("port %03x = %02x\n", i-0x80, mad_read(i)));

/*
* Set the WSS address
@@ -863,6 +887,7 @@
MODULE_PARM(cddma,"i");
MODULE_PARM(opl4,"i");
MODULE_PARM(joystick,"i");
+MODULE_PARM(debug,"i");

EXPORT_NO_SYMBOLS;
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