[PATCH] Creative Audigy 2 cardbus: Add IO window wakeup magic

This adds the magic IO wakeup code for the CardBus version of the
Creative Labs Audigy 2 to the snd-emu10k1 driver.

Without the magic IO enable sequence, reading from the IO region of the
card will fail spectacularly, and the machine will hang.

My next task will be getting the driver to actually play sound without
distortion.
Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>

[ This is a work-in-progress, but since it avoids a total lockup
  if the emu10k module is loaded on a machine with the cardbus
  card inserted, we're better off with it than without it, even
  if sound quality is bad right now ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/sound/emu10k1.h

@@ -1055,6 +1055,7 @@ typedef struct {
 	unsigned char emu10k2_chip; /* Audigy 1 or Audigy 2. */
 	unsigned char ca0102_chip;  /* Audigy 1 or Audigy 2. Not SB Audigy 2 Value. */
 	unsigned char ca0108_chip;  /* Audigy 2 Value */
+	unsigned char ca_cardbus_chip; /* Audigy 2 ZS Notebook */
 	unsigned char ca0151_chip;  /* P16V */
 	unsigned char spk71;        /* Has 7.1 speakers */
 	unsigned char sblive51;	    /* SBLive! 5.1 - extout 0x11 -> center, 0x12 -> lfe */

sound/pci/emu10k1/emu10k1_main.c

@@ -579,6 +579,30 @@ static int __devinit snd_emu10k1_ecard_init(emu10k1_t * emu)
 	return 0;
 }
 
+static int __devinit snd_emu10k1_cardbus_init(emu10k1_t * emu)
+{
+	unsigned long special_port;
+	unsigned int value;
+
+	/* Special initialisation routine
+	 * before the rest of the IO-Ports become active.
+	 */
+	special_port = emu->port + 0x38;
+	value = inl(special_port);
+	outl(0x00d00000, special_port);
+	value = inl(special_port);
+	outl(0x00d00001, special_port);
+	value = inl(special_port);
+	outl(0x00d0005f, special_port);
+	value = inl(special_port);
+	outl(0x00d0007f, special_port);
+	value = inl(special_port);
+	outl(0x0090007f, special_port);
+	value = inl(special_port);
+
+	return 0;
+}
+
 /*
  *  Create the EMU10K1 instance
  */
@@ -624,6 +648,16 @@ static emu_chip_details_t emu_chip_details[] = {
 	 .ca0108_chip = 1,
 	 .spk71 = 1,
 	 .ac97_chip = 1} ,
+	/* Audigy 2 ZS Notebook Cardbus card.*/
+	/* Tested by James@superbug.co.uk 30th October 2005 */
+	/* Not working yet, but progressing. */
+	{.vendor = 0x1102, .device = 0x0008, .subsystem = 0x20011102,
+	 .driver = "Audigy2", .name = "Audigy 2 ZS Notebook [SB0530]", 
+	 .id = "Audigy2",
+	 .emu10k2_chip = 1,
+	 .ca0108_chip = 1,
+	 .ca_cardbus_chip = 1,
+	 .spk71 = 1} ,
 	{.vendor = 0x1102, .device = 0x0008, 
 	 .driver = "Audigy2", .name = "Audigy 2 Value [Unknown]", 
 	 .id = "Audigy2",
@@ -1011,6 +1045,11 @@ int __devinit snd_emu10k1_create(snd_card_t * card,
 			snd_emu10k1_free(emu);
 			return err;
 		}
+	} else if (emu->card_capabilities->ca_cardbus_chip) {
+		if ((err = snd_emu10k1_cardbus_init(emu)) < 0) {
+			snd_emu10k1_free(emu);
+			return err;
+		}
 	} else {
 		/* 5.1: Enable the additional AC97 Slots. If the emu10k1 version
 			does not support this, it shouldn't do any harm */