V4L/DVB (9199): adv7175: 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>

1 files changed, 60 insertions, 183 deletions

diff --git a/drivers/media/video/adv7175.c b/drivers/media/video/adv7175.c
index 8ee07a68f702..6008e84653f1 100644
--- a/drivers/media/video/adv7175.c
+++ b/drivers/media/video/adv7175.c
@@ -25,43 +25,24 @@
  */
 
 #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_encoder.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-i2c-drv-legacy.h>
 
 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
 MODULE_AUTHOR("Dave Perks");
 MODULE_LICENSE("GPL");
 
-
-#define I2C_NAME(s) (s)->name
-
-
 static int debug;
 module_param(debug, int, 0);
 MODULE_PARM_DESC(debug, "Debug level (0-1)");
 
-#define dprintk(num, format, args...) \
-        do { \
-                if (debug >= num) \
-                        printk(format, ##args); \
-        } while (0)
-
 /* ----------------------------------------------------------------------- */
 
 struct adv7175 {
@@ -77,33 +58,23 @@ struct adv7175 {
 #define   I2C_ADV7175        0xd4
 #define   I2C_ADV7176        0x54
 
-static char adv7175_name[] = "adv7175";
-static char adv7176_name[] = "adv7176";
-
 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
 
 /* ----------------------------------------------------------------------- */
 
-static inline int
-adv7175_write (struct i2c_client *client,
-               u8                 reg,
-               u8                 value)
+static inline int adv7175_write(struct i2c_client *client, u8 reg, u8 value)
 {
         return i2c_smbus_write_byte_data(client, reg, value);
 }
 
-static inline int
-adv7175_read (struct i2c_client *client,
-              u8                 reg)
+static inline int adv7175_read(struct i2c_client *client, u8 reg)
 {
         return i2c_smbus_read_byte_data(client, reg);
 }
 
-static int
-adv7175_write_block (struct i2c_client *client,
-                     const u8          *data,
-                     unsigned int       len)
+static int adv7175_write_block(struct i2c_client *client,
+                     const u8 *data, unsigned int len)
 {
         int ret = -1;
         u8 reg;
@@ -123,18 +94,17 @@ adv7175_write_block (struct i2c_client *client,
                                 reg++;
                                 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 = adv7175_write(client, reg,
-                                                 *data++)) < 0)
+                        ret = adv7175_write(client, reg, *data++);
+                        if (ret < 0)
                                 break;
                         len -= 2;
                 }
@@ -143,13 +113,11 @@ adv7175_write_block (struct i2c_client *client,
         return ret;
 }
 
-static void
-set_subcarrier_freq (struct i2c_client *client,
-                     int                pass_through)
+static void set_subcarrier_freq(struct i2c_client *client, int pass_through)
 {
         /* for some reason pass_through NTSC needs
          * a different sub-carrier freq to remain stable. */
-        if(pass_through)
+        if (pass_through)
                 adv7175_write(client, 0x02, 0x00);
         else
                 adv7175_write(client, 0x02, 0x55);
@@ -160,12 +128,12 @@ set_subcarrier_freq (struct i2c_client *client,
 }
 
 /* ----------------------------------------------------------------------- */
-// Output filter:  S-Video  Composite
+/* Output filter:  S-Video  Composite */
 
-#define MR050       0x11        //0x09
-#define MR060       0x14        //0x0c
+#define MR050       0x11        /* 0x09 */
+#define MR060       0x14        /* 0x0c */
 
-//---------------------------------------------------------------------------
+/* ----------------------------------------------------------------------- */
 
 #define TR0MODE     0x46
 #define TR0RST      0x80
@@ -216,15 +184,11 @@ static const unsigned char init_ntsc[] = {
         0x06, 0x1a,             /* subc. phase */
 };
 
-static int
-adv7175_command (struct i2c_client *client,
-                 unsigned int       cmd,
-                 void              *arg)
+static int adv7175_command(struct i2c_client *client, unsigned cmd, void *arg)
 {
         struct adv7175 *encoder = i2c_get_clientdata(client);
 
         switch (cmd) {
-
         case 0:
                 /* This is just for testing!!! */
                 adv7175_write_block(client, init_common,
@@ -242,15 +206,14 @@ adv7175_command (struct i2c_client *client,
                              VIDEO_ENCODER_SECAM; /* well, hacky */
                 cap->inputs = 2;
                 cap->outputs = 1;
-        }
                 break;
+        }
 
         case ENCODER_SET_NORM:
         {
                 int iarg = *(int *) arg;
 
                 switch (iarg) {
-
                 case VIDEO_MODE_NTSC:
                         adv7175_write_block(client, init_ntsc,
                                             sizeof(init_ntsc));
@@ -284,16 +247,13 @@ adv7175_command (struct i2c_client *client,
                         adv7175_write(client, 0x07, TR0MODE);
                         break;
                 default:
-                        dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
-                                I2C_NAME(client), iarg);
+                        v4l_dbg(1, debug, client, "illegal norm: %d\n", iarg);
                         return -EINVAL;
-
                 }
-                dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
-                        norms[iarg]);
+                v4l_dbg(1, debug, client, "switched to %s\n", norms[iarg]);
                 encoder->norm = iarg;
-        }
                 break;
+        }
 
         case ENCODER_SET_INPUT:
         {
@@ -304,7 +264,6 @@ adv7175_command (struct i2c_client *client,
                  *iarg = 2: color bar */
 
                 switch (iarg) {
-
                 case 0:
                         adv7175_write(client, 0x01, 0x00);
 
@@ -331,7 +290,7 @@ adv7175_command (struct i2c_client *client,
                         adv7175_write(client, 0x0d, 0x49);
                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
                         adv7175_write(client, 0x07, TR0MODE);
-                        //udelay(10);
+                        /* udelay(10); */
                         break;
 
                 case 2:
@@ -343,39 +302,35 @@ adv7175_command (struct i2c_client *client,
                         adv7175_write(client, 0x0d, 0x49);
                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
                         adv7175_write(client, 0x07, TR0MODE);
-                        //udelay(10);
+                        /* udelay(10); */
                         break;
 
                 default:
-                        dprintk(1, KERN_ERR "%s: illegal input: %d\n",
-                                I2C_NAME(client), iarg);
+                        v4l_dbg(1, debug, client, "illegal input: %d\n", iarg);
                         return -EINVAL;
-
                 }
-                dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
-                        inputs[iarg]);
+                v4l_dbg(1, debug, client, "switched to %s\n", inputs[iarg]);
                 encoder->input = iarg;
-        }
                 break;
+        }
 
         case ENCODER_SET_OUTPUT:
         {
                 int *iarg = arg;
 
                 /* not much choice of outputs */
-                if (*iarg != 0) {
+                if (*iarg != 0)
                         return -EINVAL;
-                }
-        }
                 break;
+        }
 
         case ENCODER_ENABLE_OUTPUT:
         {
                 int *iarg = arg;
 
                 encoder->enable = !!*iarg;
-        }
                 break;
+        }
 
         default:
                 return -EINVAL;
@@ -390,145 +345,67 @@ adv7175_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_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
+static unsigned short normal_i2c[] = {
+        I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 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 struct i2c_driver i2c_driver_adv7175;
+I2C_CLIENT_INSMOD;
 
-static int
-adv7175_detect_client (struct i2c_adapter *adapter,
-                       int                 address,
-                       int                 kind)
+static int adv7175_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
 {
         int i;
-        struct i2c_client *client;
         struct adv7175 *encoder;
-        char *dname;
-
-        dprintk(1,
-                KERN_INFO
-                "adv7175.c: detecting adv7175 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_adv7175;
-        if ((client->addr == I2C_ADV7175 >> 1) ||
-            (client->addr == (I2C_ADV7175 >> 1) + 1)) {
-                dname = adv7175_name;
-        } else if ((client->addr == I2C_ADV7176 >> 1) ||
-                   (client->addr == (I2C_ADV7176 >> 1) + 1)) {
-                dname = adv7176_name;
-        } else {
-                /* We should never get here!!! */
-                kfree(client);
-                return 0;
-        }
-        strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
+        v4l_info(client, "chip found @ 0x%x (%s)\n",
+                        client->addr << 1, client->adapter->name);
 
         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
-        if (encoder == NULL) {
-                kfree(client);
+        if (encoder == NULL)
                 return -ENOMEM;
-        }
         encoder->norm = VIDEO_MODE_PAL;
         encoder->input = 0;
         encoder->enable = 1;
         i2c_set_clientdata(client, encoder);
 
-        i = i2c_attach_client(client);
-        if (i) {
-                kfree(client);
-                kfree(encoder);
-                return i;
-        }
-
         i = adv7175_write_block(client, init_common, sizeof(init_common));
         if (i >= 0) {
                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
                 i = adv7175_write(client, 0x07, TR0MODE);
                 i = adv7175_read(client, 0x12);
-                dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
-                        I2C_NAME(client), i & 1, client->addr << 1);
+                v4l_dbg(1, debug, client, "revision %d\n", i & 1);
         }
-        if (i < 0) {
-                dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
-                        I2C_NAME(client), i);
-        }
-
+        if (i < 0)
+                v4l_dbg(1, debug, client, "init error 0x%x\n", i);
         return 0;
 }
 
-static int
-adv7175_attach_adapter (struct i2c_adapter *adapter)
-{
-        dprintk(1,
-                KERN_INFO
-                "adv7175.c: starting probe for adapter %s (0x%x)\n",
-                I2C_NAME(adapter), adapter->id);
-        return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
-}
-
-static int
-adv7175_detach_client (struct i2c_client *client)
+static int adv7175_remove(struct i2c_client *client)
 {
-        struct adv7175 *encoder = i2c_get_clientdata(client);
-        int err;
-
-        err = i2c_detach_client(client);
-        if (err) {
-                return err;
-        }
-
-        kfree(encoder);
-        kfree(client);
-
+        kfree(i2c_get_clientdata(client));
         return 0;
 }
 
 /* ----------------------------------------------------------------------- */
 
-static struct i2c_driver i2c_driver_adv7175 = {
-        .driver = {
-                .name = "adv7175",      /* name */
-        },
-
-        .id = I2C_DRIVERID_ADV7175,
+static const struct i2c_device_id adv7175_id[] = {
+        { "adv7175", 0 },
+        { "adv7176", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, adv7175_id);
 
-        .attach_adapter = adv7175_attach_adapter,
-        .detach_client = adv7175_detach_client,
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+        .name = "adv7175",
+        .driverid = I2C_DRIVERID_ADV7175,
         .command = adv7175_command,
+        .probe = adv7175_probe,
+        .remove = adv7175_remove,
+        .id_table = adv7175_id,
 };
-
-static int __init
-adv7175_init (void)
-{
-        return i2c_add_driver(&i2c_driver_adv7175);
-}
-
-static void __exit
-adv7175_exit (void)
-{
-        i2c_del_driver(&i2c_driver_adv7175);
-}
-
-module_init(adv7175_init);
-module_exit(adv7175_exit);