11da177e4SLinus Torvalds #ifndef __SOUND_I2C_H 21da177e4SLinus Torvalds #define __SOUND_I2C_H 31da177e4SLinus Torvalds 41da177e4SLinus Torvalds /* 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 91da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 101da177e4SLinus Torvalds * (at your option) any later version. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 131da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 141da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 151da177e4SLinus Torvalds * GNU General Public License for more details. 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 181da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 191da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * 221da177e4SLinus Torvalds */ 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds #define SND_I2C_DEVICE_ADDRTEN (1<<0) /* 10-bit I2C address */ 251da177e4SLinus Torvalds 26*97f02e05STakashi Iwai struct snd_i2c_device { 271da177e4SLinus Torvalds struct list_head list; 28*97f02e05STakashi Iwai struct snd_i2c_bus *bus; /* I2C bus */ 291da177e4SLinus Torvalds char name[32]; /* some useful device name */ 301da177e4SLinus Torvalds unsigned short flags; /* device flags */ 311da177e4SLinus Torvalds unsigned short addr; /* device address (might be 10-bit) */ 321da177e4SLinus Torvalds unsigned long private_value; 331da177e4SLinus Torvalds void *private_data; 34*97f02e05STakashi Iwai void (*private_free)(struct snd_i2c_device *device); 351da177e4SLinus Torvalds }; 361da177e4SLinus Torvalds 37*97f02e05STakashi Iwai #define snd_i2c_device(n) list_entry(n, struct snd_i2c_device, list) 381da177e4SLinus Torvalds 39*97f02e05STakashi Iwai struct snd_i2c_bit_ops { 40*97f02e05STakashi Iwai void (*start)(struct snd_i2c_bus *bus); /* transfer start */ 41*97f02e05STakashi Iwai void (*stop)(struct snd_i2c_bus *bus); /* transfer stop */ 42*97f02e05STakashi Iwai void (*direction)(struct snd_i2c_bus *bus, int clock, int data); /* set line direction (0 = write, 1 = read) */ 43*97f02e05STakashi Iwai void (*setlines)(struct snd_i2c_bus *bus, int clock, int data); 44*97f02e05STakashi Iwai int (*getclock)(struct snd_i2c_bus *bus); 45*97f02e05STakashi Iwai int (*getdata)(struct snd_i2c_bus *bus, int ack); 46*97f02e05STakashi Iwai }; 471da177e4SLinus Torvalds 48*97f02e05STakashi Iwai struct snd_i2c_ops { 49*97f02e05STakashi Iwai int (*sendbytes)(struct snd_i2c_device *device, unsigned char *bytes, int count); 50*97f02e05STakashi Iwai int (*readbytes)(struct snd_i2c_device *device, unsigned char *bytes, int count); 51*97f02e05STakashi Iwai int (*probeaddr)(struct snd_i2c_bus *bus, unsigned short addr); 52*97f02e05STakashi Iwai }; 531da177e4SLinus Torvalds 54*97f02e05STakashi Iwai struct snd_i2c_bus { 55*97f02e05STakashi Iwai struct snd_card *card; /* card which I2C belongs to */ 561da177e4SLinus Torvalds char name[32]; /* some useful label */ 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds struct semaphore lock_mutex; 591da177e4SLinus Torvalds 60*97f02e05STakashi Iwai struct snd_i2c_bus *master; /* master bus when SCK/SCL is shared */ 611da177e4SLinus Torvalds struct list_head buses; /* master: slave buses sharing SCK/SCL, slave: link list */ 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds struct list_head devices; /* attached devices to this bus */ 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds union { 66*97f02e05STakashi Iwai struct snd_i2c_bit_ops *bit; 671da177e4SLinus Torvalds void *ops; 681da177e4SLinus Torvalds } hw_ops; /* lowlevel operations */ 69*97f02e05STakashi Iwai struct snd_i2c_ops *ops; /* midlevel operations */ 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds unsigned long private_value; 721da177e4SLinus Torvalds void *private_data; 73*97f02e05STakashi Iwai void (*private_free)(struct snd_i2c_bus *bus); 741da177e4SLinus Torvalds }; 751da177e4SLinus Torvalds 76*97f02e05STakashi Iwai #define snd_i2c_slave_bus(n) list_entry(n, struct snd_i2c_bus, buses) 771da177e4SLinus Torvalds 78*97f02e05STakashi Iwai int snd_i2c_bus_create(struct snd_card *card, const char *name, 79*97f02e05STakashi Iwai struct snd_i2c_bus *master, struct snd_i2c_bus **ri2c); 80*97f02e05STakashi Iwai int snd_i2c_device_create(struct snd_i2c_bus *bus, const char *name, 81*97f02e05STakashi Iwai unsigned char addr, struct snd_i2c_device **rdevice); 82*97f02e05STakashi Iwai int snd_i2c_device_free(struct snd_i2c_device *device); 831da177e4SLinus Torvalds 84*97f02e05STakashi Iwai static inline void snd_i2c_lock(struct snd_i2c_bus *bus) 85*97f02e05STakashi Iwai { 861da177e4SLinus Torvalds if (bus->master) 871da177e4SLinus Torvalds down(&bus->master->lock_mutex); 881da177e4SLinus Torvalds else 891da177e4SLinus Torvalds down(&bus->lock_mutex); 901da177e4SLinus Torvalds } 91*97f02e05STakashi Iwai 92*97f02e05STakashi Iwai static inline void snd_i2c_unlock(struct snd_i2c_bus *bus) 93*97f02e05STakashi Iwai { 941da177e4SLinus Torvalds if (bus->master) 951da177e4SLinus Torvalds up(&bus->master->lock_mutex); 961da177e4SLinus Torvalds else 971da177e4SLinus Torvalds up(&bus->lock_mutex); 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 100*97f02e05STakashi Iwai int snd_i2c_sendbytes(struct snd_i2c_device *device, unsigned char *bytes, int count); 101*97f02e05STakashi Iwai int snd_i2c_readbytes(struct snd_i2c_device *device, unsigned char *bytes, int count); 102*97f02e05STakashi Iwai int snd_i2c_probeaddr(struct snd_i2c_bus *bus, unsigned short addr); 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds #endif /* __SOUND_I2C_H */ 105