diff options
Diffstat (limited to 'include/sound/i2c.h')
| -rw-r--r-- | include/sound/i2c.h | 78 |
1 files changed, 40 insertions, 38 deletions
diff --git a/include/sound/i2c.h b/include/sound/i2c.h index a665ddf9c146..81eb23ed761f 100644 --- a/include/sound/i2c.h +++ b/include/sound/i2c.h @@ -21,82 +21,84 @@ * */ -typedef struct _snd_i2c_device snd_i2c_device_t; -typedef struct _snd_i2c_bus snd_i2c_bus_t; - #define SND_I2C_DEVICE_ADDRTEN (1<<0) /* 10-bit I2C address */ -struct _snd_i2c_device { +struct snd_i2c_device { struct list_head list; - snd_i2c_bus_t *bus; /* I2C bus */ + struct snd_i2c_bus *bus; /* I2C bus */ char name[32]; /* some useful device name */ unsigned short flags; /* device flags */ unsigned short addr; /* device address (might be 10-bit) */ unsigned long private_value; void *private_data; - void (*private_free)(snd_i2c_device_t *device); + void (*private_free)(struct snd_i2c_device *device); +}; + +#define snd_i2c_device(n) list_entry(n, struct snd_i2c_device, list) + +struct snd_i2c_bit_ops { + void (*start)(struct snd_i2c_bus *bus); /* transfer start */ + void (*stop)(struct snd_i2c_bus *bus); /* transfer stop */ + void (*direction)(struct snd_i2c_bus *bus, int clock, int data); /* set line direction (0 = write, 1 = read) */ + void (*setlines)(struct snd_i2c_bus *bus, int clock, int data); + int (*getclock)(struct snd_i2c_bus *bus); + int (*getdata)(struct snd_i2c_bus *bus, int ack); }; -#define snd_i2c_device(n) list_entry(n, snd_i2c_device_t, list) - -typedef struct _snd_i2c_bit_ops { - void (*start)(snd_i2c_bus_t *bus); /* transfer start */ - void (*stop)(snd_i2c_bus_t *bus); /* transfer stop */ - void (*direction)(snd_i2c_bus_t *bus, int clock, int data); /* set line direction (0 = write, 1 = read) */ - void (*setlines)(snd_i2c_bus_t *bus, int clock, int data); - int (*getclock)(snd_i2c_bus_t *bus); - int (*getdata)(snd_i2c_bus_t *bus, int ack); -} snd_i2c_bit_ops_t; - -typedef struct _snd_i2c_ops { - int (*sendbytes)(snd_i2c_device_t *device, unsigned char *bytes, int count); - int (*readbytes)(snd_i2c_device_t *device, unsigned char *bytes, int count); - int (*probeaddr)(snd_i2c_bus_t *bus, unsigned short addr); -} snd_i2c_ops_t; - -struct _snd_i2c_bus { - snd_card_t *card; /* card which I2C belongs to */ +struct snd_i2c_ops { + int (*sendbytes)(struct snd_i2c_device *device, unsigned char *bytes, int count); + int (*readbytes)(struct snd_i2c_device *device, unsigned char *bytes, int count); + int (*probeaddr)(struct snd_i2c_bus *bus, unsigned short addr); +}; + +struct snd_i2c_bus { + struct snd_card *card; /* card which I2C belongs to */ char name[32]; /* some useful label */ struct semaphore lock_mutex; - snd_i2c_bus_t *master; /* master bus when SCK/SCL is shared */ + struct snd_i2c_bus *master; /* master bus when SCK/SCL is shared */ struct list_head buses; /* master: slave buses sharing SCK/SCL, slave: link list */ struct list_head devices; /* attached devices to this bus */ union { - snd_i2c_bit_ops_t *bit; + struct snd_i2c_bit_ops *bit; void *ops; } hw_ops; /* lowlevel operations */ - snd_i2c_ops_t *ops; /* midlevel operations */ + struct snd_i2c_ops *ops; /* midlevel operations */ unsigned long private_value; void *private_data; - void (*private_free)(snd_i2c_bus_t *bus); + void (*private_free)(struct snd_i2c_bus *bus); }; -#define snd_i2c_slave_bus(n) list_entry(n, snd_i2c_bus_t, buses) +#define snd_i2c_slave_bus(n) list_entry(n, struct snd_i2c_bus, buses) -int snd_i2c_bus_create(snd_card_t *card, const char *name, snd_i2c_bus_t *master, snd_i2c_bus_t **ri2c); -int snd_i2c_device_create(snd_i2c_bus_t *bus, const char *name, unsigned char addr, snd_i2c_device_t **rdevice); -int snd_i2c_device_free(snd_i2c_device_t *device); +int snd_i2c_bus_create(struct snd_card *card, const char *name, + struct snd_i2c_bus *master, struct snd_i2c_bus **ri2c); +int snd_i2c_device_create(struct snd_i2c_bus *bus, const char *name, + unsigned char addr, struct snd_i2c_device **rdevice); +int snd_i2c_device_free(struct snd_i2c_device *device); -static inline void snd_i2c_lock(snd_i2c_bus_t *bus) { +static inline void snd_i2c_lock(struct snd_i2c_bus *bus) +{ if (bus->master) down(&bus->master->lock_mutex); else down(&bus->lock_mutex); } -static inline void snd_i2c_unlock(snd_i2c_bus_t *bus) { + +static inline void snd_i2c_unlock(struct snd_i2c_bus *bus) +{ if (bus->master) up(&bus->master->lock_mutex); else up(&bus->lock_mutex); } -int snd_i2c_sendbytes(snd_i2c_device_t *device, unsigned char *bytes, int count); -int snd_i2c_readbytes(snd_i2c_device_t *device, unsigned char *bytes, int count); -int snd_i2c_probeaddr(snd_i2c_bus_t *bus, unsigned short addr); +int snd_i2c_sendbytes(struct snd_i2c_device *device, unsigned char *bytes, int count); +int snd_i2c_readbytes(struct snd_i2c_device *device, unsigned char *bytes, int count); +int snd_i2c_probeaddr(struct snd_i2c_bus *bus, unsigned short addr); #endif /* __SOUND_I2C_H */ |