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-rw-r--r--sys/dev/i2c/files.i2c9
-rw-r--r--sys/dev/i2c/i2c_bitbang.c179
-rw-r--r--sys/dev/i2c/i2c_bitbang.h63
3 files changed, 3 insertions, 248 deletions
diff --git a/sys/dev/i2c/files.i2c b/sys/dev/i2c/files.i2c
index 8def66dd392..3a0b718af89 100644
--- a/sys/dev/i2c/files.i2c
+++ b/sys/dev/i2c/files.i2c
@@ -1,15 +1,12 @@
-# $OpenBSD: files.i2c,v 1.25 2005/12/30 23:19:51 djm Exp $
+# $OpenBSD: files.i2c,v 1.26 2006/01/02 19:49:26 miod Exp $
# $NetBSD: files.i2c,v 1.3 2003/10/20 16:24:10 briggs Exp $
define i2c {[addr = -1], [size = -1]}
device iic: i2c
attach iic at i2cbus
file dev/i2c/i2c.c iic | i2cbus
-file dev/i2c/i2c_exec.c iic | i2cbus | i2cexec
-file dev/i2c/i2c_scan.c iic | i2cbus | i2cexec
-
-# Common module for bit-bang'ing an I2C bus
-file dev/i2c/i2c_bitbang.c i2c_bitbang
+file dev/i2c/i2c_exec.c iic | i2cbus
+file dev/i2c/i2c_scan.c iic | i2cbus
#
# I2C client devices
diff --git a/sys/dev/i2c/i2c_bitbang.c b/sys/dev/i2c/i2c_bitbang.c
deleted file mode 100644
index ba03967c0e8..00000000000
--- a/sys/dev/i2c/i2c_bitbang.c
+++ /dev/null
@@ -1,179 +0,0 @@
-/* $OpenBSD: i2c_bitbang.c,v 1.1 2004/05/23 17:33:43 grange Exp $ */
-/* $NetBSD: i2c_bitbang.c,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
-
-/*
- * Copyright (c) 2003 Wasabi Systems, Inc.
- * All rights reserved.
- *
- * Written by Jason R. Thorpe for Wasabi Systems, Inc.
- *
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed for the NetBSD Project by
- * Wasabi Systems, Inc.
- * 4. The name of Wasabi Systems, Inc. may not be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
- * 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.
- */
-
-/*
- * Common module for bit-bang'ing an I2C bus.
- */
-
-#include <sys/param.h>
-
-#include <dev/i2c/i2cvar.h>
-#include <dev/i2c/i2c_bitbang.h>
-
-#define BB_SET(x) ops->ibo_set_bits(v, (x))
-#define BB_DIR(x) ops->ibo_set_dir(v, (x))
-#define BB_READ ops->ibo_read_bits(v)
-
-#define SDA ops->ibo_bits[I2C_BIT_SDA] /* i2c signal */
-#define SCL ops->ibo_bits[I2C_BIT_SCL] /* i2c signal */
-#define OUTPUT ops->ibo_bits[I2C_BIT_OUTPUT] /* SDA is output */
-#define INPUT ops->ibo_bits[I2C_BIT_INPUT] /* SDA is input */
-
-/*ARGSUSED*/
-int
-i2c_bitbang_send_start(void *v, int flags, i2c_bitbang_ops_t ops)
-{
-
- BB_DIR(OUTPUT);
-
- BB_SET(SDA | SCL);
- delay(5); /* bus free time (4.7 uS) */
- BB_SET( SCL);
- delay(4); /* start hold time (4.0 uS) */
- BB_SET( 0);
- delay(5); /* clock low time (4.7 uS) */
-
- return (0);
-}
-
-/*ARGSUSED*/
-int
-i2c_bitbang_send_stop(void *v, int flags, i2c_bitbang_ops_t ops)
-{
-
- BB_DIR(OUTPUT);
-
- BB_SET( SCL);
- delay(4); /* stop setup time (4.0 uS) */
- BB_SET(SDA | SCL);
-
- return (0);
-}
-
-int
-i2c_bitbang_initiate_xfer(void *v, i2c_addr_t addr, int flags,
- i2c_bitbang_ops_t ops)
-{
- int i2caddr;
-
- /* XXX Only support 7-bit addressing for now. */
- if ((addr & 0x78) == 0x78)
- return (EINVAL);
-
- i2caddr = (addr << 1) | ((flags & I2C_F_READ) ? 1 : 0);
-
- (void) i2c_bitbang_send_start(v, flags, ops);
- return (i2c_bitbang_write_byte(v, i2caddr, flags & ~I2C_F_STOP, ops));
-}
-
-int
-i2c_bitbang_read_byte(void *v, uint8_t *valp, int flags,
- i2c_bitbang_ops_t ops)
-{
- int i;
- uint8_t val = 0;
- uint32_t bit;
-
- BB_DIR(INPUT);
- BB_SET(SDA );
-
- for (i = 0; i < 8; i++) {
- val <<= 1;
- BB_SET(SDA | SCL);
- delay(4); /* clock high time (4.0 uS) */
- if (BB_READ & SDA)
- val |= 1;
- BB_SET(SDA );
- delay(5); /* clock low time (4.7 uS) */
- }
-
- bit = (flags & I2C_F_LAST) ? SDA : 0;
- BB_DIR(OUTPUT);
- BB_SET(bit );
- delay(1); /* data setup time (250 nS) */
- BB_SET(bit | SCL);
- delay(4); /* clock high time (4.0 uS) */
- BB_SET(bit );
- delay(5); /* clock low time (4.7 uS) */
-
- BB_DIR(INPUT);
- BB_SET(SDA );
- delay(5);
-
- if ((flags & (I2C_F_STOP | I2C_F_LAST)) == (I2C_F_STOP | I2C_F_LAST))
- (void) i2c_bitbang_send_stop(v, flags, ops);
-
- *valp = val;
- return (0);
-}
-
-int
-i2c_bitbang_write_byte(void *v, uint8_t val, int flags,
- i2c_bitbang_ops_t ops)
-{
- uint32_t bit;
- uint8_t mask;
- int error;
-
- BB_DIR(OUTPUT);
-
- for (mask = 0x80; mask != 0; mask >>= 1) {
- bit = (val & mask) ? SDA : 0;
- BB_SET(bit );
- delay(1); /* data setup time (250 nS) */
- BB_SET(bit | SCL);
- delay(4); /* clock high time (4.0 uS) */
- BB_SET(bit );
- delay(5); /* clock low time (4.7 uS) */
- }
-
- BB_DIR(INPUT);
-
- BB_SET(SDA );
- delay(5);
- BB_SET(SDA | SCL);
- delay(4);
- error = (BB_READ & SDA) ? EIO : 0;
- BB_SET(SDA );
- delay(5);
-
- if (flags & I2C_F_STOP)
- (void) i2c_bitbang_send_stop(v, flags, ops);
-
- return (error);
-}
diff --git a/sys/dev/i2c/i2c_bitbang.h b/sys/dev/i2c/i2c_bitbang.h
deleted file mode 100644
index a8311bb9daa..00000000000
--- a/sys/dev/i2c/i2c_bitbang.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/* $OpenBSD: i2c_bitbang.h,v 1.1 2004/05/23 17:33:43 grange Exp $ */
-/* $NetBSD: i2c_bitbang.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
-
-/*
- * Copyright (c) 2003 Wasabi Systems, Inc.
- * All rights reserved.
- *
- * Written by Jason R. Thorpe for Wasabi Systems, Inc.
- *
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed for the NetBSD Project by
- * Wasabi Systems, Inc.
- * 4. The name of Wasabi Systems, Inc. may not be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
- * 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.
- */
-
-#ifndef _DEV_I2C_I2C_BITBANG_H_
-#define _DEV_I2C_I2C_BITBANG_H_
-
-#define I2C_BIT_SDA 0 /* SDA signal */
-#define I2C_BIT_SCL 1 /* SCL signal */
-#define I2C_BIT_OUTPUT 2 /* controller: SDA is output */
-#define I2C_BIT_INPUT 3 /* controller: SDA is input */
-#define I2C_NBITS 4
-
-struct i2c_bitbang_ops {
- void (*ibo_set_bits)(void *, uint32_t);
- void (*ibo_set_dir)(void *, uint32_t);
- uint32_t (*ibo_read_bits)(void *);
- uint32_t ibo_bits[I2C_NBITS];
-};
-
-typedef const struct i2c_bitbang_ops *i2c_bitbang_ops_t;
-
-int i2c_bitbang_send_start(void *, int, i2c_bitbang_ops_t);
-int i2c_bitbang_send_stop(void *, int, i2c_bitbang_ops_t);
-int i2c_bitbang_initiate_xfer(void *, i2c_addr_t, int, i2c_bitbang_ops_t);
-int i2c_bitbang_read_byte(void *, uint8_t *, int, i2c_bitbang_ops_t);
-int i2c_bitbang_write_byte(void *, uint8_t, int, i2c_bitbang_ops_t);
-
-#endif /* _DEV_I2C_I2C_BITBANG_H_ */
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