[2.6.13 PATCH 1/4] 01-lgdt3302-isolate-tuner.patch

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Michael Krufky wrote:

This patch series spans both video4linux and linux-dvb trees.
Remove the dvb_pll_desc from the lgdt3302 frontend and replace with a pll_set-callback to isolate the tuner programming from the frontend.

Select the RF input connector based upon the type of demodulation selected. ANT RF connector is selected for 8-VSB and CABLE RF connector is selected for QAM64/QAM256. Implement this along the lines posted to linux-dvb list (subscribers only) by Patrick Boettcher. ( http://linuxtv.org/pipermail/linux-dvb/2005-July/003557.html ) This only affects the cards that use the Microtune 4042 tuner. This is not ideal, but there is no current specification for selecting RF inputs. It makes the card work the same way as the Windows driver thus it may reduce user confusion.



Remove the dvb_pll_desc from the frontend and replace with a
pll_set-callback to isolate the tuner programming from the frontend.

Signed-off-by: Mac Michaels <[email protected]>
Signed-off-by: Michael Krufky <[email protected]>

 linux/drivers/media/dvb/frontends/lgdt3302.c |   68 ++++++++-----------
 linux/drivers/media/dvb/frontends/lgdt3302.h |    7 -
 linux/drivers/media/video/cx88/cx88-dvb.c    |   34 +++++----
 3 files changed, 55 insertions(+), 54 deletions(-)

diff -u linux-2.6.13/drivers/media/dvb/frontends/lgdt3302.c linux/drivers/media/dvb/frontends/lgdt3302.c
--- linux-2.6.13/drivers/media/dvb/frontends/lgdt3302.c	2005-07-20 22:29:42.000000000 +0000
+++ linux/drivers/media/dvb/frontends/lgdt3302.c	2005-07-20 22:44:44.000000000 +0000
@@ -74,11 +74,14 @@
 			   u8 *buf, /* data bytes to send */
 			   int len  /* number of bytes to send */ )
 {
-	if (addr == state->config->pll_address) {
-		struct i2c_msg msg =
-			{ .addr = addr, .flags = 0, .buf = buf,  .len = len };
-		int err;
+	u8 tmp[] = { buf[0], buf[1] };
+	struct i2c_msg msg =
+		{ .addr = addr, .flags = 0, .buf = tmp,  .len = 2 };
+	int err;
+	int i;
 
+	for (i=1; i<len; i++) {
+		tmp[1] = buf[i];
 		if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
 			printk(KERN_WARNING "lgdt3302: %s error (addr %02x <- %02x, err == %i)\n", __FUNCTION__, addr, buf[0], err);
 			if (err < 0)
@@ -86,27 +89,11 @@
 			else
 				return -EREMOTEIO;
 		}
-	} else {
-		u8 tmp[] = { buf[0], buf[1] };
-		struct i2c_msg msg =
-			{ .addr = addr, .flags = 0, .buf = tmp,  .len = 2 };
-		int err;
-		int i;
-
-		for (i=1; i<len; i++) {
-			tmp[1] = buf[i];
-			if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
-				printk(KERN_WARNING "lgdt3302: %s error (addr %02x <- %02x, err == %i)\n", __FUNCTION__, addr, buf[0], err);
-				if (err < 0)
-					return err;
-				else
-					return -EREMOTEIO;
-			}
-			tmp[0]++;
-		}
+		tmp[0]++;
 	}
 	return 0;
 }
+
 static int i2c_readbytes (struct lgdt3302_state* state,
 			  u8 addr, /* demod_address or pll_address */
 			  u8 *buf, /* holds data bytes read */
@@ -207,7 +194,6 @@
 static int lgdt3302_set_parameters(struct dvb_frontend* fe,
 				   struct dvb_frontend_parameters *param)
 {
-	u8 buf[4];
 	struct lgdt3302_state* state =
 		(struct lgdt3302_state*) fe->demodulator_priv;
 
@@ -290,16 +276,30 @@
 
 	/* Change only if we are actually changing the channel */
 	if (state->current_frequency != param->frequency) {
-		dvb_pll_configure(state->config->pll_desc, buf,
-				  param->frequency, 0);
-		dprintk("%s: tuner bytes: 0x%02x 0x%02x "
-			"0x%02x 0x%02x\n", __FUNCTION__, buf[0],buf[1],buf[2],buf[3]);
-		i2c_writebytes(state, state->config->pll_address ,buf, 4);
+		u8 buf[5];
 
-		/* Check the status of the tuner pll */
-		i2c_readbytes(state, state->config->pll_address, buf, 1);
-		dprintk("%s: tuner status byte = 0x%02x\n", __FUNCTION__, buf[0]);
+		/* This must be done before the initialized msg is declared */
+		state->config->pll_set(fe, param, buf);
 
+		struct i2c_msg msg =
+			{ .addr = buf[0], .flags = 0, .buf = &buf[1], .len = 4 };
+		int err;
+
+		dprintk("%s: tuner at 0x%02x bytes: 0x%02x 0x%02x "
+			"0x%02x 0x%02x\n", __FUNCTION__,
+			buf[0],buf[1],buf[2],buf[3],buf[4]);
+		if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
+			printk(KERN_WARNING "lgdt3302: %s error (addr %02x <- %02x, err = %i)\n", __FUNCTION__, buf[0], buf[1], err);
+			if (err < 0)
+				return err;
+			else
+				return -EREMOTEIO;
+		}
+#if 0
+		/* Check the status of the tuner pll */
+		i2c_readbytes(state, buf[0], &buf[1], 1);
+		dprintk("%s: tuner status byte = 0x%02x\n", __FUNCTION__, buf[1]);
+#endif
 		/* Update current frequency */
 		state->current_frequency = param->frequency;
 	}
@@ -322,12 +322,6 @@
 
 	*status = 0; /* Reset status result */
 
-	/* Check the status of the tuner pll */
-	i2c_readbytes(state, state->config->pll_address, buf, 1);
-	dprintk("%s: tuner status byte = 0x%02x\n", __FUNCTION__, buf[0]);
-	if ((buf[0] & 0xc0) != 0x40)
-		return 0; /* Tuner PLL not locked or not powered on */
-
 	/*
 	 * You must set the Mask bits to 1 in the IRQ_MASK in order
 	 * to see that status bit in the IRQ_STATUS register.
diff -u linux-2.6.13/drivers/media/dvb/frontends/lgdt3302.h linux/drivers/media/dvb/frontends/lgdt3302.h
--- linux-2.6.13/drivers/media/dvb/frontends/lgdt3302.h	2005-07-20 22:29:34.000000000 +0000
+++ linux/drivers/media/dvb/frontends/lgdt3302.h	2005-07-20 22:44:44.000000000 +0000
@@ -1,6 +1,4 @@
 /*
- * $Id: lgdt3302.h,v 1.2 2005/06/28 23:50:48 mkrufky Exp $
- *
  *    Support for LGDT3302 (DViCO FustionHDTV 3 Gold) - VSB/QAM
  *
  *    Copyright (C) 2005 Wilson Michaels <[email protected]>
@@ -30,8 +28,9 @@
 {
 	/* The demodulator's i2c address */
 	u8 demod_address;
-	u8 pll_address;
-	struct dvb_pll_desc *pll_desc;
+
+	/* PLL interface */
+	int (*pll_set)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params, u8* pll_address);
 
 	/* Need to set device param for start_dma */
 	int (*set_ts_params)(struct dvb_frontend* fe, int is_punctured);
diff -u linux-2.6.13/drivers/media/video/cx88/cx88-dvb.c linux/drivers/media/video/cx88/cx88-dvb.c
--- linux-2.6.13/drivers/media/video/cx88/cx88-dvb.c	2005-07-20 22:35:18.000000000 +0000
+++ linux/drivers/media/video/cx88/cx88-dvb.c	2005-07-20 22:44:44.000000000 +0000
@@ -1,5 +1,5 @@
 /*
- * $Id: cx88-dvb.c,v 1.42 2005/07/12 15:44:55 mkrufky Exp $
+ * $Id: cx88-dvb.c,v 1.47 2005/07/20 05:20:37 mkrufky Exp $
  *
  * device driver for Conexant 2388x based TV cards
  * MPEG Transport Stream (DVB) routines
@@ -211,6 +211,18 @@
 #endif
 
 #if CONFIG_DVB_LGDT3302
+static int lgdt3302_pll_set(struct dvb_frontend* fe,
+			    struct dvb_frontend_parameters* params,
+			    u8* pllbuf)
+{
+	struct cx8802_dev *dev= fe->dvb->priv;
+
+	pllbuf[0] = dev->core->pll_addr;
+	dvb_pll_configure(dev->core->pll_desc, &pllbuf[1],
+			  params->frequency, 0);
+	return 0;
+}
+
 static int lgdt3302_set_ts_param(struct dvb_frontend* fe, int is_punctured)
 {
 	struct cx8802_dev *dev= fe->dvb->priv;
@@ -221,17 +233,9 @@
 	return 0;
 }
 
-static struct lgdt3302_config fusionhdtv_3_gold_q = {
-	.demod_address    = 0x0e,
-	.pll_address      = 0x61,
-	.pll_desc         = &dvb_pll_microtune_4042,
-	.set_ts_params    = lgdt3302_set_ts_param,
-};
-
-static struct lgdt3302_config fusionhdtv_3_gold_t = {
+static struct lgdt3302_config fusionhdtv_3_gold = {
 	.demod_address    = 0x0e,
-	.pll_address      = 0x61,
-	.pll_desc         = &dvb_pll_thomson_dtt7611,
+	.pll_set          = lgdt3302_pll_set,
 	.set_ts_params    = lgdt3302_set_ts_param,
 };
 #endif
@@ -294,7 +298,9 @@
 		mdelay(100);
 		cx_set(MO_GP0_IO, 9); // ANT connector too FIXME
 		mdelay(200);
-		dev->dvb.frontend = lgdt3302_attach(&fusionhdtv_3_gold_q,
+		dev->core->pll_addr = 0x61;
+		dev->core->pll_desc = &dvb_pll_microtune_4042;
+		dev->dvb.frontend = lgdt3302_attach(&fusionhdtv_3_gold,
 						    &dev->core->i2c_adap);
 		}
 		break;
@@ -308,7 +314,9 @@
 		mdelay(100);
 		cx_set(MO_GP0_IO, 9); /* ANT connector too FIXME */
 		mdelay(200);
-		dev->dvb.frontend = lgdt3302_attach(&fusionhdtv_3_gold_t,
+		dev->core->pll_addr = 0x61;
+		dev->core->pll_desc = &dvb_pll_thomson_dtt7611;
+		dev->dvb.frontend = lgdt3302_attach(&fusionhdtv_3_gold,
 						    &dev->core->i2c_adap);
 		}
 		break;

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