| 1 | #ifndef __SND_I2C_H
|
|---|
| 2 | #define __SND_I2C_H
|
|---|
| 3 |
|
|---|
| 4 | /*
|
|---|
| 5 | *
|
|---|
| 6 | *
|
|---|
| 7 | * This program is free software; you can redistribute it and/or modify
|
|---|
| 8 | * it under the terms of the GNU General Public License as published by
|
|---|
| 9 | * the Free Software Foundation; either version 2 of the License, or
|
|---|
| 10 | * (at your option) any later version.
|
|---|
| 11 | *
|
|---|
| 12 | * This program is distributed in the hope that it will be useful,
|
|---|
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 15 | * GNU General Public License for more details.
|
|---|
| 16 | *
|
|---|
| 17 | * You should have received a copy of the GNU General Public License
|
|---|
| 18 | * along with this program; if not, write to the Free Software
|
|---|
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|---|
| 20 | *
|
|---|
| 21 | *
|
|---|
| 22 | */
|
|---|
| 23 |
|
|---|
| 24 | #define SNDRV_LOCK_I2C_BUS(bus) spin_lock_irqsave(&bus->lock, flags)
|
|---|
| 25 | #define SNDRV_UNLOCK_I2C_BUS(bus) spin_unlock_irqrestore(&bus->lock, flags)
|
|---|
| 26 |
|
|---|
| 27 | typedef struct _snd_i2c_device snd_i2c_device_t;
|
|---|
| 28 | typedef struct _snd_i2c_bus snd_i2c_bus_t;
|
|---|
| 29 |
|
|---|
| 30 | struct _snd_i2c_device {
|
|---|
| 31 | struct list_head list;
|
|---|
| 32 | snd_i2c_bus_t *bus; /* I2C bus */
|
|---|
| 33 | char name[32]; /* some useful device name */
|
|---|
| 34 | unsigned char addr; /* device address */
|
|---|
| 35 | unsigned long private_value;
|
|---|
| 36 | void *private_data;
|
|---|
| 37 | void (*private_free)(snd_i2c_device_t *device);
|
|---|
| 38 | };
|
|---|
| 39 |
|
|---|
| 40 | #define snd_i2c_device(n) list_entry(n, snd_i2c_device_t, list)
|
|---|
| 41 |
|
|---|
| 42 | struct _snd_i2c_bus {
|
|---|
| 43 | snd_card_t *card; /* card which I2C belongs to */
|
|---|
| 44 | char name[32]; /* some useful label */
|
|---|
| 45 |
|
|---|
| 46 | spinlock_t lock;
|
|---|
| 47 |
|
|---|
| 48 | struct list_head devices; /* attached devices */
|
|---|
| 49 |
|
|---|
| 50 | /* Software I2C */
|
|---|
| 51 | void (*i2c_setlines) (snd_i2c_bus_t * bus, int ctrl, int data);
|
|---|
| 52 | int (*i2c_getdataline) (snd_i2c_bus_t * bus);
|
|---|
| 53 |
|
|---|
| 54 | /* Hardware I2C */
|
|---|
| 55 | int (*i2c_read) (snd_i2c_bus_t * bus, unsigned char addr);
|
|---|
| 56 | int (*i2c_write) (snd_i2c_bus_t * bus, unsigned char addr, unsigned char b1, unsigned char b2, int both);
|
|---|
| 57 |
|
|---|
| 58 | unsigned long private_value;
|
|---|
| 59 | void *private_data;
|
|---|
| 60 | void (*private_free)(snd_i2c_bus_t *bus);
|
|---|
| 61 | };
|
|---|
| 62 |
|
|---|
| 63 |
|
|---|
| 64 | int snd_i2c_bus_create(snd_card_t *card, const char *name, snd_i2c_bus_t **ri2c);
|
|---|
| 65 | int snd_i2c_device_create(snd_i2c_bus_t *bus, const char *name, unsigned char addr, snd_i2c_device_t **rdevice);
|
|---|
| 66 | int snd_i2c_device_free(snd_i2c_device_t *device);
|
|---|
| 67 |
|
|---|
| 68 | /* i2c bus access functions */
|
|---|
| 69 | void snd_i2c_reset(snd_i2c_bus_t *bus);
|
|---|
| 70 | void snd_i2c_start(snd_i2c_bus_t *bus);
|
|---|
| 71 | void snd_i2c_stop(snd_i2c_bus_t *bus);
|
|---|
| 72 | void snd_i2c_one(snd_i2c_bus_t *bus);
|
|---|
| 73 | void snd_i2c_zero(snd_i2c_bus_t *bus);
|
|---|
| 74 | int snd_i2c_ack(snd_i2c_bus_t *bus);
|
|---|
| 75 |
|
|---|
| 76 | int snd_i2c_sendbyte(snd_i2c_bus_t *bus, unsigned char data, int wait_for_ack);
|
|---|
| 77 | unsigned char snd_i2c_readbyte(snd_i2c_bus_t *bus, int last);
|
|---|
| 78 |
|
|---|
| 79 | /* i2c (maybe) hardware functions */
|
|---|
| 80 | int snd_i2c_read(snd_i2c_bus_t *bus, unsigned char addr);
|
|---|
| 81 | int snd_i2c_write(snd_i2c_bus_t *bus, unsigned char addr, unsigned char b1, unsigned char b2, int both);
|
|---|
| 82 | int snd_i2c_dev_read(snd_i2c_device_t *device);
|
|---|
| 83 | int snd_i2c_dev_write(snd_i2c_device_t *device, unsigned char b1, unsigned char b2, int both);
|
|---|
| 84 |
|
|---|
| 85 | #endif /* __SND_I2C_H */
|
|---|
