diff options
Diffstat (limited to 'drivers/i2c-slave/i2c_slave_device.h')
| -rw-r--r-- | drivers/i2c-slave/i2c_slave_device.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/i2c-slave/i2c_slave_device.h b/drivers/i2c-slave/i2c_slave_device.h new file mode 100644 index 000000000000..e08ea569e030 --- /dev/null +++ b/drivers/i2c-slave/i2c_slave_device.h @@ -0,0 +1,79 @@ +/* + * Copyright 2007-2008 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#ifndef __I2C_SLAVE_H__ +#define __I2C_SLAVE_H__ + +#include <linux/list.h> +#include "i2c_slave_ring_buffer.h" + +#define I2C_SLAVE_DEVICE_MAX 256 +extern int i2c_slave_major; + +typedef struct i2c_slave_device { + struct list_head list; + u8 address; + u32 scl_freq; + char *name; + i2c_slave_ring_buffer_t *receive_buffer; + i2c_slave_ring_buffer_t *send_buffer; + int (*start) (struct i2c_slave_device *); + int (*stop) (struct i2c_slave_device *); + /*int (*set_freq)(struct i2c_slave_device*); + int (*set_addr)(struct i2c_slave_device*);*/ + void *private_data; + struct device *dev; + int id; +} i2c_slave_device_t; + +/* + used by the specific device to set some infomations. +*/ +void i2c_slave_device_set_name(i2c_slave_device_t *device, char *name); +void i2c_slave_device_set_address(i2c_slave_device_t *device, u8 address); +i2c_slave_device_t *i2c_slave_device_find(int id); +u8 i2c_slave_device_get_addr(i2c_slave_device_t *device); +int i2c_slave_device_set_freq(i2c_slave_device_t *device, u32 freq); +u32 i2c_slave_device_get_freq(i2c_slave_device_t *device); + +/* +**used by the specific i2c device to register itself to the core. +*/ +i2c_slave_device_t *i2c_slave_device_alloc(void); +void i2c_slave_device_free(i2c_slave_device_t *); +int i2c_slave_device_register(i2c_slave_device_t *device); +void i2c_slave_device_unregister(i2c_slave_device_t *device); + +/* + this two functions are used by i2c slave core to start or stop the specific i2c device. +*/ +int i2c_slave_device_start(i2c_slave_device_t *device); +int i2c_slave_device_stop(i2c_slave_device_t *device); + +/* + this two functions are used by i2c slave core to get data by the specific i2c slave device + or send data to it for it to feed i2c master's need. + + @mod: async(1) or sync(0) mode. +*/ +int i2c_slave_device_read(i2c_slave_device_t *device, int num, u8 *data); +int i2c_slave_device_write(i2c_slave_device_t *device, int num, u8 *data); + +/* +*this 2 functions used by the specific i2c slave device when they got data from master, +*or is requested by master. +*/ +int i2c_slave_device_produce(i2c_slave_device_t *device, int num, u8 *data); +int i2c_slave_device_consume(i2c_slave_device_t *device, int num, u8 *data); + +#endif |