V4L/DVB (9205): saa7111: convert i2c driver for new i2c API

- Convert to use v4l2-i2c-drv-legacy.h to be able to handle the new i2c API
- Cleanups
- Use v4l_dbg/v4l_info to have uniform kernel messages

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7111.c

@@ -28,43 +28,24 @@
  */
 
 #include <linux/module.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/kernel.h>
-#include <linux/major.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/signal.h>
 #include <linux/types.h>
-#include <linux/i2c.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/page.h>
+#include <linux/ioctl.h>
 #include <asm/uaccess.h>
-
+#include <linux/i2c.h>
+#include <linux/i2c-id.h>
 #include <linux/videodev.h>
 #include <linux/video_decoder.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-i2c-drv-legacy.h>
 
 MODULE_DESCRIPTION("Philips SAA7111 video decoder driver");
 MODULE_AUTHOR("Dave Perks");
 MODULE_LICENSE("GPL");
 
-
-#define I2C_NAME(s) (s)->name
-
-
 static int debug;
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Debug level (0-1)");
 
-#define dprintk(num, format, args...) \
-	do { \
-		if (debug >= num) \
-			printk(format, ##args); \
-	} while (0)
-
 /* ----------------------------------------------------------------------- */
 
 #define SAA7111_NR_REG		0x18
@@ -77,14 +58,9 @@ struct saa7111 {
 	int enable;
 };
 
-#define   I2C_SAA7111        0x48
-
 /* ----------------------------------------------------------------------- */
 
-static inline int
-saa7111_write (struct i2c_client *client,
-	       u8                 reg,
-	       u8                 value)
+static inline int saa7111_write(struct i2c_client *client, u8 reg, u8 value)
 {
 	struct saa7111 *decoder = i2c_get_clientdata(client);
 
@@ -92,8 +68,7 @@ saa7111_write (struct i2c_client *client,
 	return i2c_smbus_write_byte_data(client, reg, value);
 }
 
-static inline void
-saa7111_write_if_changed(struct i2c_client *client, u8 reg, u8 value)
+static inline void saa7111_write_if_changed(struct i2c_client *client, u8 reg, u8 value)
 {
 	struct saa7111 *decoder = i2c_get_clientdata(client);
 
@@ -103,10 +78,7 @@ saa7111_write_if_changed(struct i2c_client *client, u8 reg, u8 value)
 	}
 }
 
-static int
-saa7111_write_block (struct i2c_client *client,
-		     const u8          *data,
-		     unsigned int       len)
+static int saa7111_write_block(struct i2c_client *client, const u8 *data, unsigned int len)
 {
 	int ret = -1;
 	u8 reg;
@@ -127,18 +99,17 @@ saa7111_write_block (struct i2c_client *client,
 				    decoder->reg[reg++] = data[1];
 				len -= 2;
 				data += 2;
-			} while (len >= 2 && data[0] == reg &&
-				 block_len < 32);
-			if ((ret = i2c_master_send(client, block_data,
-						   block_len)) < 0)
+			} while (len >= 2 && data[0] == reg && block_len < 32);
+			ret = i2c_master_send(client, block_data, block_len);
+			if (ret < 0)
 				break;
 		}
 	} else {
 		/* do some slow I2C emulation kind of thing */
 		while (len >= 2) {
 			reg = *data++;
-			if ((ret = saa7111_write(client, reg,
-						 *data++)) < 0)
+			ret = saa7111_write(client, reg, *data++);
+			if (ret < 0)
 				break;
 			len -= 2;
 		}
@@ -147,16 +118,13 @@ saa7111_write_block (struct i2c_client *client,
 	return ret;
 }
 
-static int
-saa7111_init_decoder (struct i2c_client *client,
-	      struct video_decoder_init *init)
+static int saa7111_init_decoder(struct i2c_client *client,
+		struct video_decoder_init *init)
 {
 	return saa7111_write_block(client, init->data, init->len);
 }
 
-static inline int
-saa7111_read (struct i2c_client *client,
-	      u8                 reg)
+static inline int saa7111_read(struct i2c_client *client, u8 reg)
 {
 	return i2c_smbus_read_byte_data(client, reg);
 }
@@ -203,28 +171,23 @@ static const unsigned char saa7111_i2c_init[] = {
 	0x17, 0x00,		/* 17 - VBI */
 };
 
-static int
-saa7111_command (struct i2c_client *client,
-		 unsigned int       cmd,
-		 void              *arg)
+static int saa7111_command(struct i2c_client *client, unsigned cmd, void *arg)
 {
 	struct saa7111 *decoder = i2c_get_clientdata(client);
 
 	switch (cmd) {
-
 	case 0:
 		break;
 	case DECODER_INIT:
 	{
 		struct video_decoder_init *init = arg;
+		struct video_decoder_init vdi;
+
 		if (NULL != init)
 			return saa7111_init_decoder(client, init);
-		else {
-			struct video_decoder_init vdi;
-			vdi.data = saa7111_i2c_init;
-			vdi.len = sizeof(saa7111_i2c_init);
-			return saa7111_init_decoder(client, &vdi);
-		}
+		vdi.data = saa7111_i2c_init;
+		vdi.len = sizeof(saa7111_i2c_init);
+		return saa7111_init_decoder(client, &vdi);
 	}
 
 	case DECODER_DUMP:
@@ -234,15 +197,15 @@ saa7111_command (struct i2c_client *client,
 		for (i = 0; i < SAA7111_NR_REG; i += 16) {
 			int j;
 
-			printk(KERN_DEBUG "%s: %03x", I2C_NAME(client), i);
+			v4l_info(client, "%03x", i);
 			for (j = 0; j < 16 && i + j < SAA7111_NR_REG; ++j) {
-				printk(" %02x",
+				printk(KERN_CONT " %02x",
 				       saa7111_read(client, i + j));
 			}
-			printk("\n");
+			printk(KERN_CONT "\n");
 		}
-	}
 		break;
+	}
 
 	case DECODER_GET_CAPABILITIES:
 	{
@@ -255,8 +218,8 @@ saa7111_command (struct i2c_client *client,
 			     VIDEO_DECODER_CCIR;
 		cap->inputs = 8;
 		cap->outputs = 1;
-	}
 		break;
+	}
 
 	case DECODER_GET_STATUS:
 	{
@@ -265,8 +228,7 @@ saa7111_command (struct i2c_client *client,
 		int res;
 
 		status = saa7111_read(client, 0x1f);
-		dprintk(1, KERN_DEBUG "%s status: 0x%02x\n", I2C_NAME(client),
-			status);
+		v4l_dbg(1, debug, client, "status: 0x%02x\n", status);
 		res = 0;
 		if ((status & (1 << 6)) == 0) {
 			res |= DECODER_STATUS_GOOD;
@@ -294,8 +256,8 @@ saa7111_command (struct i2c_client *client,
 			res |= DECODER_STATUS_COLOR;
 		}
 		*iarg = res;
-	}
 		break;
+	}
 
 	case DECODER_SET_GPIO:
 	{
@@ -362,8 +324,8 @@ saa7111_command (struct i2c_client *client,
 
 		}
 		decoder->norm = *iarg;
-	}
 		break;
+	}
 
 	case DECODER_SET_INPUT:
 	{
@@ -387,8 +349,8 @@ saa7111_command (struct i2c_client *client,
 							     3) ? 0x80 :
 							    0));
 		}
-	}
 		break;
+	}
 
 	case DECODER_SET_OUTPUT:
 	{
@@ -398,8 +360,8 @@ saa7111_command (struct i2c_client *client,
 		if (*iarg != 0) {
 			return -EINVAL;
 		}
-	}
 		break;
+	}
 
 	case DECODER_ENABLE_OUTPUT:
 	{
@@ -439,8 +401,8 @@ saa7111_command (struct i2c_client *client,
 					      (decoder->reg[0x11] & 0xf3));
 			}
 		}
-	}
 		break;
+	}
 
 	case DECODER_SET_PICTURE:
 	{
@@ -454,8 +416,8 @@ saa7111_command (struct i2c_client *client,
 		saa7111_write(client, 0x0c, pic->colour >> 9);
 		/* We want -128 to 127 we get 0-65535 */
 		saa7111_write(client, 0x0d, (pic->hue - 32768) >> 8);
-	}
 		break;
+	}
 
 	default:
 		return -EINVAL;
@@ -466,48 +428,23 @@ saa7111_command (struct i2c_client *client,
 
 /* ----------------------------------------------------------------------- */
 
-/*
- * Generic i2c probe
- * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
- */
-static unsigned short normal_i2c[] = { I2C_SAA7111 >> 1, I2C_CLIENT_END };
-
-static unsigned short ignore = I2C_CLIENT_END;
-
-static struct i2c_client_address_data addr_data = {
-	.normal_i2c		= normal_i2c,
-	.probe			= &ignore,
-	.ignore			= &ignore,
-};
+static unsigned short normal_i2c[] = { 0x48 >> 1, I2C_CLIENT_END };
 
-static struct i2c_driver i2c_driver_saa7111;
+I2C_CLIENT_INSMOD;
 
-static int
-saa7111_detect_client (struct i2c_adapter *adapter,
-		       int                 address,
-		       int                 kind)
+static int saa7111_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
 {
 	int i;
-	struct i2c_client *client;
 	struct saa7111 *decoder;
 	struct video_decoder_init vdi;
 
-	dprintk(1,
-		KERN_INFO
-		"saa7111.c: detecting saa7111 client on address 0x%x\n",
-		address << 1);
-
 	/* Check if the adapter supports the needed features */
-	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return 0;
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -ENODEV;
 
-	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
-	if (!client)
-		return -ENOMEM;
-	client->addr = address;
-	client->adapter = adapter;
-	client->driver = &i2c_driver_saa7111;
-	strlcpy(I2C_NAME(client), "saa7111", sizeof(I2C_NAME(client)));
+	v4l_info(client, "chip found @ 0x%x (%s)\n",
+			client->addr << 1, client->adapter->name);
 
 	decoder = kzalloc(sizeof(struct saa7111), GFP_KERNEL);
 	if (decoder == NULL) {
@@ -519,82 +456,37 @@ saa7111_detect_client (struct i2c_adapter *adapter,
 	decoder->enable = 1;
 	i2c_set_clientdata(client, decoder);
 
-	i = i2c_attach_client(client);
-	if (i) {
-		kfree(client);
-		kfree(decoder);
-		return i;
-	}
-
 	vdi.data = saa7111_i2c_init;
 	vdi.len = sizeof(saa7111_i2c_init);
 	i = saa7111_init_decoder(client, &vdi);
 	if (i < 0) {
-		dprintk(1, KERN_ERR "%s_attach error: init status %d\n",
-			I2C_NAME(client), i);
+		v4l_dbg(1, debug, client, "init status %d\n", i);
 	} else {
-		dprintk(1,
-			KERN_INFO
-			"%s_attach: chip version %x at address 0x%x\n",
-			I2C_NAME(client), saa7111_read(client, 0x00) >> 4,
-			client->addr << 1);
+		v4l_dbg(1, debug, client, "revision %x\n",
+			saa7111_read(client, 0x00) >> 4);
 	}
-
 	return 0;
 }
 
-static int
-saa7111_attach_adapter (struct i2c_adapter *adapter)
+static int saa7111_remove(struct i2c_client *client)
 {
-	dprintk(1,
-		KERN_INFO
-		"saa7111.c: starting probe for adapter %s (0x%x)\n",
-		I2C_NAME(adapter), adapter->id);
-	return i2c_probe(adapter, &addr_data, &saa7111_detect_client);
-}
-
-static int
-saa7111_detach_client (struct i2c_client *client)
-{
-	struct saa7111 *decoder = i2c_get_clientdata(client);
-	int err;
-
-	err = i2c_detach_client(client);
-	if (err) {
-		return err;
-	}
-
-	kfree(decoder);
-	kfree(client);
-
+	kfree(i2c_get_clientdata(client));
 	return 0;
 }
 
 /* ----------------------------------------------------------------------- */
 
-static struct i2c_driver i2c_driver_saa7111 = {
-	.driver = {
-		.name = "saa7111",
-	},
-
-	.id = I2C_DRIVERID_SAA7111A,
+static const struct i2c_device_id saa7111_id[] = {
+	{ "saa7111_old", 0 },	/* "saa7111" maps to the saa7115 driver */
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, saa7111_id);
 
-	.attach_adapter = saa7111_attach_adapter,
-	.detach_client = saa7111_detach_client,
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+	.name = "saa7111",
+	.driverid = I2C_DRIVERID_SAA7111A,
 	.command = saa7111_command,
+	.probe = saa7111_probe,
+	.remove = saa7111_remove,
+	.id_table = saa7111_id,
 };
-
-static int __init
-saa7111_init (void)
-{
-	return i2c_add_driver(&i2c_driver_saa7111);
-}
-
-static void __exit
-saa7111_exit (void)
-{
-	i2c_del_driver(&i2c_driver_saa7111);
-}
-
-module_init(saa7111_init);
-module_exit(saa7111_exit);