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Diffstat (limited to 'sys/dev/iicbus/iiconf.h')
| -rw-r--r-- | sys/dev/iicbus/iiconf.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/sys/dev/iicbus/iiconf.h b/sys/dev/iicbus/iiconf.h new file mode 100644 index 0000000..a9e6d76 --- /dev/null +++ b/sys/dev/iicbus/iiconf.h @@ -0,0 +1,140 @@ +/*- + * Copyright (c) 1998, 2001 Nicolas Souchu + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ +#ifndef __IICONF_H +#define __IICONF_H + +#include <sys/queue.h> + +#define IICPRI (PZERO+8) /* XXX sleep/wakeup queue priority */ + +#define n(flags) (~(flags) & (flags)) + +#define LSB 0x1 + +/* + * How tsleep() is called in iic_request_bus(). + */ +#define IIC_DONTWAIT 0 +#define IIC_NOINTR 0 +#define IIC_WAIT 0x1 +#define IIC_INTR 0x2 + +/* + * i2c modes + */ +#define IIC_MASTER 0x1 +#define IIC_SLAVE 0x2 +#define IIC_POLLED 0x4 + +/* + * i2c speed + */ +#define IIC_UNKNOWN 0x0 +#define IIC_SLOW 0x1 +#define IIC_FAST 0x2 +#define IIC_FASTEST 0x3 + +#define IIC_LAST_READ 0x1 + +/* + * callback index + */ +#define IIC_REQUEST_BUS 0x1 +#define IIC_RELEASE_BUS 0x2 + +/* + * interrupt events + */ +#define INTR_GENERAL 0x1 /* general call received */ +#define INTR_START 0x2 /* the I2C interface is addressed */ +#define INTR_STOP 0x3 /* stop condition received */ +#define INTR_RECEIVE 0x4 /* character received */ +#define INTR_TRANSMIT 0x5 /* character to transmit */ +#define INTR_ERROR 0x6 /* error */ +#define INTR_NOACK 0x7 /* no ack from master receiver */ + +/* + * adapter layer errors + */ +#define IIC_NOERR 0x0 /* no error occured */ +#define IIC_EBUSERR 0x1 /* bus error */ +#define IIC_ENOACK 0x2 /* ack not received until timeout */ +#define IIC_ETIMEOUT 0x3 /* timeout */ +#define IIC_EBUSBSY 0x4 /* bus busy */ +#define IIC_ESTATUS 0x5 /* status error */ +#define IIC_EUNDERFLOW 0x6 /* slave ready for more data */ +#define IIC_EOVERFLOW 0x7 /* too much data */ +#define IIC_ENOTSUPP 0x8 /* request not supported */ +#define IIC_ENOADDR 0x9 /* no address assigned to the interface */ + +/* + * ivars codes + */ +#define IICBUS_IVAR_ADDR 0x1 /* I2C address of the device */ + +extern int iicbus_request_bus(device_t, device_t, int); +extern int iicbus_release_bus(device_t, device_t); +extern device_t iicbus_alloc_bus(device_t); + +extern void iicbus_intr(device_t, int, char *); + +extern int iicbus_null_repeated_start(device_t, u_char); +extern int iicbus_null_callback(device_t, int, caddr_t); + +#define iicbus_reset(bus,speed,addr,oldaddr) \ + (IICBUS_RESET(device_get_parent(bus), speed, addr, oldaddr)) + +/* basic I2C operations */ +extern int iicbus_started(device_t); +extern int iicbus_start(device_t, u_char, int); +extern int iicbus_stop(device_t); +extern int iicbus_repeated_start(device_t, u_char, int); +extern int iicbus_write(device_t, char *, int, int *, int); +extern int iicbus_read(device_t, char *, int, int *, int, int); + +/* single byte read/write functions, start/stop not managed */ +extern int iicbus_write_byte(device_t, char, int); +extern int iicbus_read_byte(device_t, char *, int); + +/* Read/write operations with start/stop conditions managed */ +extern int iicbus_block_write(device_t, u_char, char *, int, int *); +extern int iicbus_block_read(device_t, u_char, char *, int, int *); + +extern u_char iicbus_get_addr(device_t); + +#define IICBUS_MODVER 1 +#define IICBUS_MINVER 1 +#define IICBUS_MAXVER 1 +#define IICBUS_PREFVER IICBUS_MODVER + +#define IICBB_MODVER 1 +#define IICBB_MINVER 1 +#define IICBB_MAXVER 1 +#define IICBB_PREFVER IICBB_MODVER + +#endif |
