diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/media/v4l2-common.h | 63 |
1 files changed, 51 insertions, 12 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 9ee616261d6..c5ca993679e 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -26,6 +26,57 @@ #ifndef V4L2_COMMON_H_ #define V4L2_COMMON_H_ +/* v4l debugging and diagnostics */ + +/* Common printk constucts for v4l-i2c drivers. These macros create a unique + prefix consisting of the driver name, the adapter number and the i2c + address. */ +#define v4l_printk(level, name, adapter, addr, fmt, arg...) \ + printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg) + +#define v4l_client_printk(level, client, fmt, arg...) \ + v4l_printk(level, (client)->driver->driver.name, (client)->adapter, \ + (client)->addr, fmt , ## arg) + +#define v4l_err(client, fmt, arg...) \ + v4l_client_printk(KERN_ERR, client, fmt , ## arg) + +#define v4l_warn(client, fmt, arg...) \ + v4l_client_printk(KERN_WARNING, client, fmt , ## arg) + +#define v4l_info(client, fmt, arg...) \ + v4l_client_printk(KERN_INFO, client, fmt , ## arg) + +/* These three macros assume that the debug level is set with a module + parameter called 'debug'. */ +#define v4l_dbg(level, client, fmt, arg...) \ + do { \ + if (debug >= (level)) \ + v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \ + } while (0) + +/* Prints the ioctl in a human-readable format */ +extern void v4l_printk_ioctl(unsigned int cmd); + +/* Use this macro for non-I2C drivers. Pass the driver name as the first arg. */ +#define v4l_print_ioctl(name, cmd) \ + do { \ + printk(KERN_DEBUG "%s: ", name); \ + v4l_printk_ioctl(cmd); \ + } while (0) + +/* Use this macro in I2C drivers where 'client' is the struct i2c_client + pointer */ +#define v4l_i2c_print_ioctl(client, cmd) \ + do { \ + v4l_client_printk(KERN_DEBUG, client, ""); \ + v4l_printk_ioctl(cmd); \ + } while (0) + +/* ------------------------------------------------------------------------- */ + +/* Internal ioctls */ + /* VIDIOC_INT_G_REGISTER and VIDIOC_INT_S_REGISTER */ struct v4l2_register { u32 i2c_id; /* I2C driver ID of the I2C chip. 0 for the I2C adapter. */ @@ -122,16 +173,4 @@ enum v4l2_chip_ident { If the frequency is not supported, then -EINVAL is returned. */ #define VIDIOC_INT_I2S_CLOCK_FREQ _IOW ('d', 108, u32) -/* Prints used ioctl */ -extern void v4l_printk_ioctl(unsigned int cmd); - -#define v4l_print_ioctl(name,cmd) do {\ - printk(KERN_DEBUG "%s: ", name); \ - v4l_printk_ioctl(cmd); } while (0) - -#define v4l_i2c_print_ioctl(client,cmd) do {\ - printk(KERN_DEBUG "%s %d-%04x: ", (client)->driver->name, \ - i2c_adapter_id((client)->adapter),(client)->addr); \ - v4l_printk_ioctl(cmd); } while (0) - #endif /* V4L2_COMMON_H_ */ |