V4L/DVB (7002): cx25840: Add basic CX23885 AVCore support

The cx23885/7/8 PCIe bridge has an internal AVCore modelled on
the cx2584x family. Many of the registers positions are identical
but some moved. The register values are also different because
the different bridges run at different clock rates.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cx25840/cx25840-audio.c

@@ -32,11 +32,17 @@ static int set_audclk_freq(struct i2c_client *client, u32 freq)
 
 	/* common for all inputs and rates */
 	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
-	cx25840_write(client, 0x127, 0x50);
+	if (!state->is_cx23885)
+		cx25840_write(client, 0x127, 0x50);
 
 	if (state->aud_input != CX25840_AUDIO_SERIAL) {
 		switch (freq) {
 		case 32000:
+			if (state->is_cx23885) {
+				/* We don't have register values
+				 * so avoid destroying registers. */
+				break;
+			}
 			/* VID_PLL and AUX_PLL */
 			cx25840_write4(client, 0x108, 0x1006040f);
 
@@ -53,6 +59,11 @@ static int set_audclk_freq(struct i2c_client *client, u32 freq)
 			break;
 
 		case 44100:
+			if (state->is_cx23885) {
+				/* We don't have register values
+				 * so avoid destroying registers. */
+				break;
+			}
 			/* VID_PLL and AUX_PLL */
 			cx25840_write4(client, 0x108, 0x1009040f);
 
@@ -69,6 +80,11 @@ static int set_audclk_freq(struct i2c_client *client, u32 freq)
 			break;
 
 		case 48000:
+			if (state->is_cx23885) {
+				/* We don't have register values
+				 * so avoid destroying registers. */
+				break;
+			}
 			/* VID_PLL and AUX_PLL */
 			cx25840_write4(client, 0x108, 0x100a040f);
 
@@ -87,6 +103,11 @@ static int set_audclk_freq(struct i2c_client *client, u32 freq)
 	} else {
 		switch (freq) {
 		case 32000:
+			if (state->is_cx23885) {
+				/* We don't have register values
+				 * so avoid destroying registers. */
+				break;
+			}
 			/* VID_PLL and AUX_PLL */
 			cx25840_write4(client, 0x108, 0x1e08040f);
 
@@ -109,6 +130,12 @@ static int set_audclk_freq(struct i2c_client *client, u32 freq)
 			break;
 
 		case 44100:
+			if (state->is_cx23885) {
+				/* We don't have register values
+				 * so avoid destroying registers. */
+				break;
+			}
+
 			/* VID_PLL and AUX_PLL */
 			cx25840_write4(client, 0x108, 0x1809040f);
 
@@ -128,22 +155,33 @@ static int set_audclk_freq(struct i2c_client *client, u32 freq)
 			break;
 
 		case 48000:
-			/* VID_PLL and AUX_PLL */
-			cx25840_write4(client, 0x108, 0x180a040f);
+			if (!state->is_cx23885) {
+				/* VID_PLL and AUX_PLL */
+				cx25840_write4(client, 0x108, 0x180a040f);
 
-			/* AUX_PLL_FRAC */
-			cx25840_write4(client, 0x110, 0x0098d6e5);
+				/* AUX_PLL_FRAC */
+				cx25840_write4(client, 0x110, 0x0098d6e5);
+			}
 
 			if (state->is_cx25836)
 				break;
 
-			/* src1_ctl = 0x08010000 */
-			cx25840_write4(client, 0x8f8, 0x08018000);
+			if (!state->is_cx23885) {
+				/* src1_ctl */
+				cx25840_write4(client, 0x8f8, 0x08018000);
 
-			/* src3/4/6_ctl = 0x08020000 */
-			cx25840_write4(client, 0x900, 0x08015555);
-			cx25840_write4(client, 0x904, 0x08015555);
-			cx25840_write4(client, 0x90c, 0x08015555);
+				/* src3/4/6_ctl */
+				cx25840_write4(client, 0x900, 0x08015555);
+				cx25840_write4(client, 0x904, 0x08015555);
+				cx25840_write4(client, 0x90c, 0x08015555);
+			} else {
+
+				cx25840_write4(client, 0x8f8, 0x0801867c);
+
+				cx25840_write4(client, 0x900, 0x08014faa);
+				cx25840_write4(client, 0x904, 0x08014faa);
+				cx25840_write4(client, 0x90c, 0x08014faa);
+			}
 			break;
 		}
 	}
@@ -188,6 +226,11 @@ void cx25840_audio_set_path(struct i2c_client *client)
 
 	/* deassert soft reset */
 	cx25840_and_or(client, 0x810, ~0x1, 0x00);
+
+	if (state->is_cx23885) {
+		/* Ensure the controller is running when we exit */
+		cx25840_and_or(client, 0x803, ~0x10, 0x10);
+	}
 }
 
 static int get_volume(struct i2c_client *client)