11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifndef __SOUND_I2C_H 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __SOUND_I2C_H 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License as published by 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (at your option) any later version. 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * GNU General Public License for more details. 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SND_I2C_DEVICE_ADDRTEN (1<<0) /* 10-bit I2C address */ 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2697f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaistruct snd_i2c_device { 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head list; 2897f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai struct snd_i2c_bus *bus; /* I2C bus */ 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char name[32]; /* some useful device name */ 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short flags; /* device flags */ 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short addr; /* device address (might be 10-bit) */ 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long private_value; 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *private_data; 3497f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai void (*private_free)(struct snd_i2c_device *device); 3597f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai}; 3697f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai 3797f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai#define snd_i2c_device(n) list_entry(n, struct snd_i2c_device, list) 3897f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai 3997f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaistruct snd_i2c_bit_ops { 4097f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai void (*start)(struct snd_i2c_bus *bus); /* transfer start */ 4197f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai void (*stop)(struct snd_i2c_bus *bus); /* transfer stop */ 4297f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai void (*direction)(struct snd_i2c_bus *bus, int clock, int data); /* set line direction (0 = write, 1 = read) */ 4397f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai void (*setlines)(struct snd_i2c_bus *bus, int clock, int data); 4497f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai int (*getclock)(struct snd_i2c_bus *bus); 4597f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai int (*getdata)(struct snd_i2c_bus *bus, int ack); 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4897f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaistruct snd_i2c_ops { 4997f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai int (*sendbytes)(struct snd_i2c_device *device, unsigned char *bytes, int count); 5097f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai int (*readbytes)(struct snd_i2c_device *device, unsigned char *bytes, int count); 5197f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai int (*probeaddr)(struct snd_i2c_bus *bus, unsigned short addr); 5297f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai}; 5397f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai 5497f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaistruct snd_i2c_bus { 5597f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai struct snd_card *card; /* card which I2C belongs to */ 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char name[32]; /* some useful label */ 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 58ef9f0a42db987e7e2df72289fb4522d24027786bIngo Molnar struct mutex lock_mutex; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6097f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai struct snd_i2c_bus *master; /* master bus when SCK/SCL is shared */ 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head buses; /* master: slave buses sharing SCK/SCL, slave: link list */ 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head devices; /* attached devices to this bus */ 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds union { 6697f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai struct snd_i2c_bit_ops *bit; 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *ops; 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } hw_ops; /* lowlevel operations */ 6997f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai struct snd_i2c_ops *ops; /* midlevel operations */ 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long private_value; 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *private_data; 7397f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai void (*private_free)(struct snd_i2c_bus *bus); 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7697f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai#define snd_i2c_slave_bus(n) list_entry(n, struct snd_i2c_bus, buses) 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7897f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaiint snd_i2c_bus_create(struct snd_card *card, const char *name, 7997f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai struct snd_i2c_bus *master, struct snd_i2c_bus **ri2c); 8097f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaiint snd_i2c_device_create(struct snd_i2c_bus *bus, const char *name, 8197f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai unsigned char addr, struct snd_i2c_device **rdevice); 8297f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaiint snd_i2c_device_free(struct snd_i2c_device *device); 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8497f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaistatic inline void snd_i2c_lock(struct snd_i2c_bus *bus) 8597f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai{ 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bus->master) 87ef9f0a42db987e7e2df72289fb4522d24027786bIngo Molnar mutex_lock(&bus->master->lock_mutex); 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 89ef9f0a42db987e7e2df72289fb4522d24027786bIngo Molnar mutex_lock(&bus->lock_mutex); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9197f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai 9297f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaistatic inline void snd_i2c_unlock(struct snd_i2c_bus *bus) 9397f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwai{ 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bus->master) 95ef9f0a42db987e7e2df72289fb4522d24027786bIngo Molnar mutex_unlock(&bus->master->lock_mutex); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 97ef9f0a42db987e7e2df72289fb4522d24027786bIngo Molnar mutex_unlock(&bus->lock_mutex); 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10097f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaiint snd_i2c_sendbytes(struct snd_i2c_device *device, unsigned char *bytes, int count); 10197f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaiint snd_i2c_readbytes(struct snd_i2c_device *device, unsigned char *bytes, int count); 10297f02e05f246a2346275c1c93a3079e8933e74b2Takashi Iwaiint snd_i2c_probeaddr(struct snd_i2c_bus *bus, unsigned short addr); 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* __SOUND_I2C_H */ 105