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iicbb.c (46743) iicbb.c (49195)
1/*-
2 * Copyright (c) 1998 Nicolas Souchu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
1/*-
2 * Copyright (c) 1998 Nicolas Souchu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $Id: iicbb.c,v 1.3 1999/01/28 15:50:24 roger Exp $
26 * $Id: iicbb.c,v 1.4 1999/05/08 21:59:04 dfr Exp $
27 *
28 */
29
30/*
31 * Generic I2C bit-banging code
32 *
33 * Example:
34 *

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65#include "iicbb_if.h"
66
67struct iicbb_softc {
68 int dummy;
69};
70
71static int iicbb_probe(device_t);
72static int iicbb_attach(device_t);
27 *
28 */
29
30/*
31 * Generic I2C bit-banging code
32 *
33 * Example:
34 *

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65#include "iicbb_if.h"
66
67struct iicbb_softc {
68 int dummy;
69};
70
71static int iicbb_probe(device_t);
72static int iicbb_attach(device_t);
73static void iicbb_print_child(device_t, device_t);
73static int iicbb_print_child(device_t, device_t);
74
75static int iicbb_callback(device_t, int, caddr_t);
76static int iicbb_start(device_t, u_char, int);
77static int iicbb_stop(device_t);
78static int iicbb_write(device_t, char *, int, int *, int);
79static int iicbb_read(device_t, char *, int, int *, int, int);
80static int iicbb_reset(device_t, u_char, u_char, u_char *);
81

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114 return (0);
115}
116
117static int iicbb_attach(device_t dev)
118{
119 return (0);
120}
121
74
75static int iicbb_callback(device_t, int, caddr_t);
76static int iicbb_start(device_t, u_char, int);
77static int iicbb_stop(device_t);
78static int iicbb_write(device_t, char *, int, int *, int);
79static int iicbb_read(device_t, char *, int, int *, int, int);
80static int iicbb_reset(device_t, u_char, u_char, u_char *);
81

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114 return (0);
115}
116
117static int iicbb_attach(device_t dev)
118{
119 return (0);
120}
121
122static void
122static int
123iicbb_print_child(device_t bus, device_t dev)
124{
125 int error;
123iicbb_print_child(device_t bus, device_t dev)
124{
125 int error;
126 int retval = 0;
126 u_char oldaddr;
127
127 u_char oldaddr;
128
129 retval += bus_print_child_header(bus, dev);
128 /* retrieve the interface I2C address */
129 error = IICBB_RESET(device_get_parent(bus), IIC_FASTEST, 0, &oldaddr);
130 if (error == IIC_ENOADDR) {
130 /* retrieve the interface I2C address */
131 error = IICBB_RESET(device_get_parent(bus), IIC_FASTEST, 0, &oldaddr);
132 if (error == IIC_ENOADDR) {
131 printf(" on %s%d master-only", device_get_name(bus),
132 device_get_unit(bus));
133
133 retval += printf(" on %s master-only\n",
134 device_get_nameunit(bus));
134 } else {
135 /* restore the address */
136 IICBB_RESET(device_get_parent(bus), IIC_FASTEST, oldaddr, NULL);
137
135 } else {
136 /* restore the address */
137 IICBB_RESET(device_get_parent(bus), IIC_FASTEST, oldaddr, NULL);
138
138 printf(" on %s%d addr 0x%x", device_get_name(bus),
139 device_get_unit(bus), oldaddr & 0xff);
139 retval += printf(" on %s addr 0x%x\n",
140 device_get_nameunit(bus), oldaddr & 0xff);
140 }
141
141 }
142
142 return;
143 return (retval);
143}
144
145#define I2C_SET(dev,ctrl,data) \
146 IICBB_SETLINES(device_get_parent(dev), ctrl, data)
147
148#define I2C_GET(dev) (IICBB_GETDATALINE(device_get_parent(dev)))
149
150static int i2c_debug = 0;

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145
146#define I2C_SET(dev,ctrl,data) \
147 IICBB_SETLINES(device_get_parent(dev), ctrl, data)
148
149#define I2C_GET(dev) (IICBB_GETDATALINE(device_get_parent(dev)))
150
151static int i2c_debug = 0;

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