[PATCH] Add support for AUX_PLL on cx2583x chips

[Sven Barth <pascaldragon@googlemail.com>]

This adds support for the AUX_PLL in cx2583x chips which is available in 
those although the audio part of the chip is not.
The AUX_PLL is used at least by Terratec in their Grabster AV400 device.

Signed-off-by: Sven Barth <pascaldragon@googlemail.com>
Acked-By: Mike Isely <isely@pobox.com>

diff -aur v4l-src/linux/drivers/media/video/cx25840//cx25840-audio.c 
v4l-build/linux/drivers/media/video/cx25840//cx25840-audio.c
--- v4l-src/linux/drivers/media/video/cx25840//cx25840-audio.c 
2009-10-18 21:08:26.497700904 +0200
+++ v4l-build/linux/drivers/media/video/cx25840//cx25840-audio.c 
2010-07-09 22:35:31.067718241 +0200
@@ -438,41 +438,45 @@
  {
  	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

-	/* assert soft reset */
-	cx25840_and_or(client, 0x810, ~0x1, 0x01);
-
-	/* stop microcontroller */
-	cx25840_and_or(client, 0x803, ~0x10, 0);
-
-	/* Mute everything to prevent the PFFT! */
-	cx25840_write(client, 0x8d3, 0x1f);
-
-	if (state->aud_input == CX25840_AUDIO_SERIAL) {
-		/* Set Path1 to Serial Audio Input */
-		cx25840_write4(client, 0x8d0, 0x01011012);
-
-		/* The microcontroller should not be started for the
-		 * non-tuner inputs: autodetection is specific for
-		 * TV audio. */
-	} else {
-		/* Set Path1 to Analog Demod Main Channel */
-		cx25840_write4(client, 0x8d0, 0x1f063870);
-	}
+        if (!is_cx2583x(state)) {
+		/* assert soft reset */
+		cx25840_and_or(client, 0x810, ~0x1, 0x01);
+
+		/* stop microcontroller */
+		cx25840_and_or(client, 0x803, ~0x10, 0);
+
+		/* Mute everything to prevent the PFFT! */
+		cx25840_write(client, 0x8d3, 0x1f);
+
+		if (state->aud_input == CX25840_AUDIO_SERIAL) {
+			/* Set Path1 to Serial Audio Input */
+			cx25840_write4(client, 0x8d0, 0x01011012);
+
+			/* The microcontroller should not be started for the
+			 * non-tuner inputs: autodetection is specific for
+			 * TV audio. */
+		} else {
+			/* Set Path1 to Analog Demod Main Channel */
+			cx25840_write4(client, 0x8d0, 0x1f063870);
+		}
+        }

  	set_audclk_freq(client, state->audclk_freq);

-	if (state->aud_input != CX25840_AUDIO_SERIAL) {
-		/* When the microcontroller detects the
-		 * audio format, it will unmute the lines */
-		cx25840_and_or(client, 0x803, ~0x10, 0x10);
-	}
-
-	/* deassert soft reset */
-	cx25840_and_or(client, 0x810, ~0x1, 0x00);
-
-	/* Ensure the controller is running when we exit */
-	if (is_cx2388x(state) || is_cx231xx(state))
-		cx25840_and_or(client, 0x803, ~0x10, 0x10);
+        if (!is_cx2583x(state)) {
+		if (state->aud_input != CX25840_AUDIO_SERIAL) {
+			/* When the microcontroller detects the
+			 * audio format, it will unmute the lines */
+			cx25840_and_or(client, 0x803, ~0x10, 0x10);
+		}
+
+		/* deassert soft reset */
+		cx25840_and_or(client, 0x810, ~0x1, 0x00);
+
+		/* Ensure the controller is running when we exit */
+		if (is_cx2388x(state) || is_cx231xx(state))
+			cx25840_and_or(client, 0x803, ~0x10, 0x10);
+        }
  }

  static int get_volume(struct i2c_client *client)
diff -aur v4l-src/linux/drivers/media/video/cx25840//cx25840-core.c 
v4l-build/linux/drivers/media/video/cx25840//cx25840-core.c
--- v4l-src/linux/drivers/media/video/cx25840//cx25840-core.c	2010-06-26 
17:56:26.238525747 +0200
+++ v4l-build/linux/drivers/media/video/cx25840//cx25840-core.c 
2010-07-09 23:28:36.784067005 +0200
@@ -691,6 +691,11 @@
  	}
  	cx25840_and_or(client, 0x401, ~0x60, 0);
  	cx25840_and_or(client, 0x401, ~0x60, 0x60);
+
+        /* Don't write into audio registers on cx2583x chips */
+        if (is_cx2583x(state))
+        	return;
+
  	cx25840_and_or(client, 0x810, ~0x01, 1);

  	if (state->radio) {
@@ -849,10 +854,8 @@

  	state->vid_input = vid_input;
  	state->aud_input = aud_input;
-	if (!is_cx2583x(state)) {
-		cx25840_audio_set_path(client);
-		input_change(client);
-	}
+	cx25840_audio_set_path(client);
+	input_change(client);

  	if (is_cx2388x(state)) {
  		/* Audio channel 1 src : Parallel 1 */
@@ -1482,8 +1485,6 @@
  	struct cx25840_state *state = to_state(sd);
  	struct i2c_client *client = v4l2_get_subdevdata(sd);

-	if (is_cx2583x(state))
-		return -EINVAL;
  	return set_input(client, state->vid_input, input);
  }

@@ -1492,8 +1493,7 @@
  	struct cx25840_state *state = to_state(sd);
  	struct i2c_client *client = v4l2_get_subdevdata(sd);

-	if (!is_cx2583x(state))
-		input_change(client);
+	input_change(client);
  	return 0;
  }