[media] em28xx: Prepare to support 2 different I2C buses

Newer em28xx devices have 2 buses. Change the logic to allow
using both buses.
This patch was generated by this small script:
for i in drivers/media/usb/em28xx/*.c; do
	sed 's,->i2c_adap,->i2c_adap[dev->def_i2c_bus],g;s,->i2c_client,->i2c_client[dev->def_i2c_bus],'
done
Of course, em28xx.h needed manual edit.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/usb/em28xx/em28xx-cards.c

@@ -2249,7 +2249,7 @@ static int em28xx_initialize_mt9m111(struct em28xx *dev)
 	};
 
 	for (i = 0; i < ARRAY_SIZE(regs); i++)
-		i2c_master_send(&dev->i2c_client, &regs[i][0], 3);
+		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], &regs[i][0], 3);
 
 	return 0;
 }
@@ -2276,7 +2276,7 @@ static int em28xx_initialize_mt9m001(struct em28xx *dev)
 	};
 
 	for (i = 0; i < ARRAY_SIZE(regs); i++)
-		i2c_master_send(&dev->i2c_client, &regs[i][0], 3);
+		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], &regs[i][0], 3);
 
 	return 0;
 }
@@ -2294,10 +2294,10 @@ static int em28xx_hint_sensor(struct em28xx *dev)
 	u16 version;
 
 	/* Micron sensor detection */
-	dev->i2c_client.addr = 0xba >> 1;
+	dev->i2c_client[dev->def_i2c_bus].addr = 0xba >> 1;
 	cmd = 0;
-	i2c_master_send(&dev->i2c_client, &cmd, 1);
-	rc = i2c_master_recv(&dev->i2c_client, (char *)&version_be, 2);
+	i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], &cmd, 1);
+	rc = i2c_master_recv(&dev->i2c_client[dev->def_i2c_bus], (char *)&version_be, 2);
 	if (rc != 2)
 		return -EINVAL;
 
@@ -2748,8 +2748,8 @@ static void em28xx_card_setup(struct em28xx *dev)
 #endif
 		/* Call first TVeeprom */
 
-		dev->i2c_client.addr = 0xa0 >> 1;
-		tveeprom_hauppauge_analog(&dev->i2c_client, &tv, dev->eedata);
+		dev->i2c_client[dev->def_i2c_bus].addr = 0xa0 >> 1;
+		tveeprom_hauppauge_analog(&dev->i2c_client[dev->def_i2c_bus], &tv, dev->eedata);
 
 		dev->tuner_type = tv.tuner_type;
 
@@ -2841,15 +2841,15 @@ static void em28xx_card_setup(struct em28xx *dev)
 
 	/* request some modules */
 	if (dev->board.has_msp34xx)
-		v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
+		v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap[dev->def_i2c_bus],
 			"msp3400", 0, msp3400_addrs);
 
 	if (dev->board.decoder == EM28XX_SAA711X)
-		v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
+		v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap[dev->def_i2c_bus],
 			"saa7115_auto", 0, saa711x_addrs);
 
 	if (dev->board.decoder == EM28XX_TVP5150)
-		v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
+		v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap[dev->def_i2c_bus],
 			"tvp5150", 0, tvp5150_addrs);
 
 	if (dev->em28xx_sensor == EM28XX_MT9V011) {
@@ -2861,25 +2861,25 @@ static void em28xx_card_setup(struct em28xx *dev)
 		};
 
 		pdata.xtal = dev->sensor_xtal;
-		v4l2_i2c_new_subdev_board(&dev->v4l2_dev, &dev->i2c_adap,
+		v4l2_i2c_new_subdev_board(&dev->v4l2_dev, &dev->i2c_adap[dev->def_i2c_bus],
 				&mt9v011_info, NULL);
 	}
 
 
 	if (dev->board.adecoder == EM28XX_TVAUDIO)
-		v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
+		v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap[dev->def_i2c_bus],
 			"tvaudio", dev->board.tvaudio_addr, NULL);
 
 	if (dev->board.tuner_type != TUNER_ABSENT) {
 		int has_demod = (dev->tda9887_conf & TDA9887_PRESENT);
 
 		if (dev->board.radio.type)
-			v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
+			v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap[dev->def_i2c_bus],
 				"tuner", dev->board.radio_addr, NULL);
 
 		if (has_demod)
 			v4l2_i2c_new_subdev(&dev->v4l2_dev,
-				&dev->i2c_adap, "tuner",
+				&dev->i2c_adap[dev->def_i2c_bus], "tuner",
 				0, v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
 		if (dev->tuner_addr == 0) {
 			enum v4l2_i2c_tuner_type type =
@@ -2887,13 +2887,13 @@ static void em28xx_card_setup(struct em28xx *dev)
 			struct v4l2_subdev *sd;
 
 			sd = v4l2_i2c_new_subdev(&dev->v4l2_dev,
-				&dev->i2c_adap, "tuner",
+				&dev->i2c_adap[dev->def_i2c_bus], "tuner",
 				0, v4l2_i2c_tuner_addrs(type));
 
 			if (sd)
 				dev->tuner_addr = v4l2_i2c_subdev_addr(sd);
 		} else {
-			v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
+			v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap[dev->def_i2c_bus],
 				"tuner", dev->tuner_addr, NULL);
 		}
 	}

drivers/media/usb/em28xx/em28xx-i2c.c

@@ -384,7 +384,7 @@ static int em28xx_i2c_read_block(struct em28xx *dev, u16 addr, bool addr_w16,
 	/* Select address */
 	buf[0] = addr >> 8;
 	buf[1] = addr & 0xff;
-	ret = i2c_master_send(&dev->i2c_client, buf + !addr_w16, 1 + addr_w16);
+	ret = i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], buf + !addr_w16, 1 + addr_w16);
 	if (ret < 0)
 		return ret;
 	/* Read data */
@@ -398,7 +398,7 @@ static int em28xx_i2c_read_block(struct em28xx *dev, u16 addr, bool addr_w16,
 		else
 			rsize = remain;
 
-		ret = i2c_master_recv(&dev->i2c_client, data, rsize);
+		ret = i2c_master_recv(&dev->i2c_client[dev->def_i2c_bus], data, rsize);
 		if (ret < 0)
 			return ret;
 
@@ -422,10 +422,10 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, u8 **eedata, u16 *eedata_len)
 	*eedata = NULL;
 	*eedata_len = 0;
 
-	dev->i2c_client.addr = 0xa0 >> 1;
+	dev->i2c_client[dev->def_i2c_bus].addr = 0xa0 >> 1;
 
 	/* Check if board has eeprom */
-	err = i2c_master_recv(&dev->i2c_client, &buf, 0);
+	err = i2c_master_recv(&dev->i2c_client[dev->def_i2c_bus], &buf, 0);
 	if (err < 0) {
 		em28xx_info("board has no eeprom\n");
 		return -ENODEV;
@@ -652,8 +652,8 @@ void em28xx_do_i2c_scan(struct em28xx *dev)
 	memset(i2c_devicelist, 0, ARRAY_SIZE(i2c_devicelist));
 
 	for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
-		dev->i2c_client.addr = i;
-		rc = i2c_master_recv(&dev->i2c_client, &buf, 0);
+		dev->i2c_client[dev->def_i2c_bus].addr = i;
+		rc = i2c_master_recv(&dev->i2c_client[dev->def_i2c_bus], &buf, 0);
 		if (rc < 0)
 			continue;
 		i2c_devicelist[i] = i;
@@ -675,21 +675,21 @@ int em28xx_i2c_register(struct em28xx *dev)
 
 	BUG_ON(!dev->em28xx_write_regs || !dev->em28xx_read_reg);
 	BUG_ON(!dev->em28xx_write_regs_req || !dev->em28xx_read_reg_req);
-	dev->i2c_adap = em28xx_adap_template;
-	dev->i2c_adap.dev.parent = &dev->udev->dev;
-	strcpy(dev->i2c_adap.name, dev->name);
-	dev->i2c_adap.algo_data = dev;
-	i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
+	dev->i2c_adap[dev->def_i2c_bus] = em28xx_adap_template;
+	dev->i2c_adap[dev->def_i2c_bus].dev.parent = &dev->udev->dev;
+	strcpy(dev->i2c_adap[dev->def_i2c_bus].name, dev->name);
+	dev->i2c_adap[dev->def_i2c_bus].algo_data = dev;
+	i2c_set_adapdata(&dev->i2c_adap[dev->def_i2c_bus], &dev->v4l2_dev);
 
-	retval = i2c_add_adapter(&dev->i2c_adap);
+	retval = i2c_add_adapter(&dev->i2c_adap[dev->def_i2c_bus]);
 	if (retval < 0) {
 		em28xx_errdev("%s: i2c_add_adapter failed! retval [%d]\n",
 			__func__, retval);
 		return retval;
 	}
 
-	dev->i2c_client = em28xx_client_template;
-	dev->i2c_client.adapter = &dev->i2c_adap;
+	dev->i2c_client[dev->def_i2c_bus] = em28xx_client_template;
+	dev->i2c_client[dev->def_i2c_bus].adapter = &dev->i2c_adap[dev->def_i2c_bus];
 
 	retval = em28xx_i2c_eeprom(dev, &dev->eedata, &dev->eedata_len);
 	if ((retval < 0) && (retval != -ENODEV)) {
@@ -711,6 +711,6 @@ int em28xx_i2c_register(struct em28xx *dev)
  */
 int em28xx_i2c_unregister(struct em28xx *dev)
 {
-	i2c_del_adapter(&dev->i2c_adap);
+	i2c_del_adapter(&dev->i2c_adap[dev->def_i2c_bus]);
 	return 0;
 }

drivers/media/usb/em28xx/em28xx-input.c

@@ -280,11 +280,12 @@ static int em2874_polling_getkey(struct em28xx_IR *ir,
 
 static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir)
 {
+	struct em28xx *dev = ir->dev;
 	static u32 ir_key;
 	int rc;
 	struct i2c_client client;
 
-	client.adapter = &ir->dev->i2c_adap;
+	client.adapter = &ir->dev->i2c_adap[dev->def_i2c_bus];
 	client.addr = ir->i2c_dev_addr;
 
 	rc = ir->get_key_i2c(&client, &ir_key);
@@ -461,7 +462,7 @@ static int em28xx_probe_i2c_ir(struct em28xx *dev)
 	};
 
 	while (addr_list[i] != I2C_CLIENT_END) {
-		if (i2c_probe_func_quick_read(&dev->i2c_adap, addr_list[i]) == 1)
+		if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], addr_list[i]) == 1)
 			return addr_list[i];
 		i++;
 	}

drivers/media/usb/em28xx/em28xx.h

@@ -157,6 +157,9 @@
 #define EM28XX_NUM_BUFS 5
 #define EM28XX_DVB_NUM_BUFS 5
 
+/* max number of I2C buses on em28xx devices */
+#define NUM_I2C_BUSES	2
+
 /* isoc transfers: number of packets for each buffer
    windows requests only 64 packets .. so we better do the same
    this is what I found out for all alternate numbers there!
@@ -507,10 +510,13 @@ struct em28xx {
 	int tuner_type;		/* type of the tuner */
 	int tuner_addr;		/* tuner address */
 	int tda9887_conf;
+
 	/* i2c i/o */
-	struct i2c_adapter i2c_adap;
-	struct i2c_client i2c_client;
+	struct i2c_adapter i2c_adap[NUM_I2C_BUSES];
+	struct i2c_client i2c_client[NUM_I2C_BUSES];
 	unsigned char eeprom_addrwidth_16bit:1;
+	int def_i2c_bus;	/* Default I2C bus */
+
 	/* video for linux */
 	int users;		/* user count for exclusive use */
 	int streaming_users;    /* Number of actively streaming users */