summaryrefslogtreecommitdiff
path: root/sys/arch/zaurus/dev/ziic.c
blob: 9f91947b271f86a6e2311ebe2a5f5f7238915943 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
/*	$NetBSD: ziic.c,v 1.6 2021/08/07 16:19:08 thorpej Exp $	*/

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by NONAKA Kimihiro.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ziic.c,v 1.6 2021/08/07 16:19:08 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/bus.h>
#include <sys/mutex.h>

#include <dev/i2c/i2cvar.h>

#include <arm/xscale/pxa2x0reg.h>
#include <arm/xscale/pxa2x0var.h>
#include <arm/xscale/pxa2x0_i2c.h>

#ifdef PXAIIC_DEBUG
#define	DPRINTF(s)	printf s
#else
#define	DPRINTF(s)	do { } while (/*CONSTCOND*/0)
#endif

struct pxaiic_softc {
	struct pxa2x0_i2c_softc	sc_pxa_i2c;
	void *			sc_ih;

	struct i2c_controller	sc_i2c;
};

static int pxaiic_match(device_t, cfdata_t, void *);
static void pxaiic_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(pxaiic, sizeof(struct pxaiic_softc),
    pxaiic_match, pxaiic_attach, NULL, NULL);

static int pxaiic_acquire_bus(void *, int);
static void pxaiic_release_bus(void *, int);
static int pxaiic_send_start(void *, int);
static int pxaiic_send_stop(void *, int);
static int pxaiic_initiate_xfer(void *, uint16_t, int);
static int pxaiic_read_byte(void *, uint8_t *, int);
static int pxaiic_write_byte(void *, uint8_t, int);

static int
pxaiic_match(device_t parent, cfdata_t cf, void *aux)
{
	struct pxaip_attach_args *pxa = aux;

	if (strcmp(cf->cf_name, pxa->pxa_name))
		return 0;

	pxa->pxa_addr = PXA2X0_I2C_BASE;
	pxa->pxa_size = PXA2X0_I2C_SIZE;
	return 1;
}

static void
pxaiic_attach(device_t parent, device_t self, void *aux)
{
	struct pxaiic_softc *sc = device_private(self);
	struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;
	struct pxaip_attach_args *pxa = aux;
	struct i2cbus_attach_args iba;

	aprint_normal(": I2C controller\n");
	aprint_naive("\n");

	psc->sc_dev = self;
	psc->sc_iot = pxa->pxa_iot;
	psc->sc_addr = pxa->pxa_addr;
	psc->sc_size = pxa->pxa_size;
	psc->sc_flags = 0;
	if (pxa2x0_i2c_attach_sub(psc)) {
		aprint_error_dev(self, "unable to attach PXA I2C controller\n");
		return;
	}

#if 0
	mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_TTY);

	sc->sc_ih = pxa2x0_intr_establish(PXA2X0_INT_I2C, IPL_TTY,
	    pxa2x0_i2c_intr, &psc);
	if (sc->sc_ih == NULL) {
		aprint_error_dev(self, "unable to establish intr\n");
		return;	/* XXX: mutex_destroy, bus_space_unmap */
	}
#endif

	/* Initialize i2c_controller */
	iic_tag_init(&sc->sc_i2c);
	sc->sc_i2c.ic_cookie = sc;
	sc->sc_i2c.ic_acquire_bus = pxaiic_acquire_bus;
	sc->sc_i2c.ic_release_bus = pxaiic_release_bus;
	sc->sc_i2c.ic_send_start = pxaiic_send_start;
	sc->sc_i2c.ic_send_stop = pxaiic_send_stop;
	sc->sc_i2c.ic_initiate_xfer = pxaiic_initiate_xfer;
	sc->sc_i2c.ic_read_byte = pxaiic_read_byte;
	sc->sc_i2c.ic_write_byte = pxaiic_write_byte;

	memset(&iba, 0, sizeof(iba));
	iba.iba_tag = &sc->sc_i2c;
	config_found(psc->sc_dev, &iba, iicbus_print, CFARGS_NONE);
}

static int
pxaiic_acquire_bus(void *cookie, int flags)
{
	struct pxaiic_softc *sc = cookie;
	struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

	pxa2x0_i2c_open(psc);

	return 0;
}

static void
pxaiic_release_bus(void *cookie, int flags)
{
	struct pxaiic_softc *sc = cookie;
	struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

	pxa2x0_i2c_close(psc);
}

static int
pxaiic_send_start(void *cookie, int flags)
{
	struct pxaiic_softc *sc = cookie;
	struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

	return pxa2x0_i2c_send_start(psc, flags);
}

static int
pxaiic_send_stop(void *cookie, int flags)
{
	struct pxaiic_softc *sc = cookie;
	struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

	return pxa2x0_i2c_send_stop(psc, flags);
}

static int
pxaiic_initiate_xfer(void *cookie, uint16_t addr, int flags)
{
	struct pxaiic_softc *sc = cookie;
	struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

	return pxa2x0_i2c_initiate_xfer(psc, addr, flags);
}

static int
pxaiic_read_byte(void *cookie, uint8_t *bytep, int flags)
{
	struct pxaiic_softc *sc = cookie;
	struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

	return pxa2x0_i2c_read_byte(psc, bytep, flags);
}

static int
pxaiic_write_byte(void *cookie, uint8_t byte, int flags)
{
	struct pxaiic_softc *sc = cookie;
	struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

	return pxa2x0_i2c_write_byte(psc, byte, flags);
}