mpu401.c revision 166322 
1/*-
2 * Copyright (c) 2003 Mathew Kanner
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
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/sound/midi/mpu401.c 166322 2007-01-28 20:38:07Z joel $");
29
30#include <sys/param.h>
31#include <sys/types.h>
32#include <sys/param.h>
33#include <sys/queue.h>
34#include <sys/kernel.h>
35#include <sys/lock.h>
36#include <sys/mutex.h>
37#include <sys/proc.h>
38#include <sys/systm.h>
39#include <sys/kobj.h>
40#include <sys/malloc.h>
41#include <sys/bus.h> /* to get driver_intr_t */
42
43#include <dev/sound/midi/mpu401.h>
44#include <dev/sound/midi/midi.h>
45
46#include "mpu_if.h"
47#include "mpufoi_if.h"
48
49#define MPU_DATAPORT   0
50#define MPU_CMDPORT    1
51#define MPU_STATPORT   1
52#define MPU_RESET      0xff
53#define MPU_UART       0x3f
54#define MPU_ACK        0xfe
55#define MPU_STATMASK   0xc0
56#define MPU_OUTPUTBUSY 0x40
57#define MPU_INPUTBUSY  0x80
58#define MPU_TRYDATA 50
59#define MPU_DELAY   2500
60
61#define CMD(m,d)	MPUFOI_WRITE(m, m->cookie, MPU_CMDPORT,d)
62#define STATUS(m)	MPUFOI_READ(m, m->cookie, MPU_STATPORT)
63#define READ(m)		MPUFOI_READ(m, m->cookie, MPU_DATAPORT)
64#define WRITE(m,d)	MPUFOI_WRITE(m, m->cookie, MPU_DATAPORT,d)
65
66struct mpu401 {
67	KOBJ_FIELDS;
68	struct snd_midi *mid;
69	int flags;
70	driver_intr_t *si;
71	void *cookie;
72	struct callout timer;
73};
74
75static void mpu401_timeout(void *m) ;
76static mpu401_intr_t mpu401_intr;
77
78static int mpu401_minit(kobj_t obj, struct mpu401 *m);
79static int mpu401_muninit(kobj_t obj, struct mpu401 *m);
80static int mpu401_minqsize(kobj_t obj, struct mpu401 *m);
81static int mpu401_moutqsize(kobj_t obj, struct mpu401 *m);
82static void mpu401_mcallback(kobj_t obj, struct mpu401 *m, int flags);
83static void mpu401_mcallbackp(kobj_t obj, struct mpu401 *m, int flags);
84static const char *mpu401_mdescr(kobj_t obj, struct mpu401 *m, int verbosity);
85static const char *mpu401_mprovider(kobj_t obj, struct mpu401 *m);
86
87static kobj_method_t mpu401_methods[] = {
88	KOBJMETHOD(mpu_init,mpu401_minit),
89	KOBJMETHOD(mpu_uninit,mpu401_muninit),
90	KOBJMETHOD(mpu_inqsize,mpu401_minqsize),
91	KOBJMETHOD(mpu_outqsize,mpu401_moutqsize),
92	KOBJMETHOD(mpu_callback,mpu401_mcallback),
93	KOBJMETHOD(mpu_callbackp,mpu401_mcallbackp),
94	KOBJMETHOD(mpu_descr,mpu401_mdescr),
95	KOBJMETHOD(mpu_provider,mpu401_mprovider),
96        { 0, 0 }
97};
98
99DEFINE_CLASS(mpu401, mpu401_methods, 0);
100
101void
102mpu401_timeout(void *a)
103{	struct mpu401 *m=(struct mpu401 *)a;
104
105	if (m->si)
106		(m->si)(m->cookie);
107
108}
109static int
110mpu401_intr(struct mpu401 *m)
111{
112#define MPU_INTR_BUF	16
113	MIDI_TYPE b[MPU_INTR_BUF];
114	int i;
115	int s;
116/*
117	printf("mpu401_intr\n");
118*/
119#define RXRDY(m) ( (STATUS(m) & MPU_INPUTBUSY) == 0)
120#define TXRDY(m) ( (STATUS(m) & MPU_OUTPUTBUSY) == 0)
121#if 0
122#define D(x,l) printf("mpu401_intr %d %x %s %s\n",l, x, x&MPU_INPUTBUSY?"RX":"", x&MPU_OUTPUTBUSY?"TX":"")
123#else
124#define D(x,l)
125#endif
126	i=0;
127	s = STATUS(m);
128	D(s,1);
129	while ( (s&MPU_INPUTBUSY) == 0 && i<MPU_INTR_BUF) {
130		b[i]=READ(m);
131/*
132		printf("mpu401_intr in i %d d %d\n", i, b[i]);
133*/
134		i++;
135	s = STATUS(m);
136	}
137	if (i) midi_in(m->mid, b, i);
138	i=0;
139	while ( !(s&MPU_OUTPUTBUSY) && i<MPU_INTR_BUF) {
140		if(midi_out(m->mid, b, 1)) {
141/*
142			printf("mpu401_intr out i %d d %d\n", i, b[0]);
143*/
144
145			WRITE(m, *b);
146		}
147		else {
148/*
149			printf("mpu401_intr write: no output\n");
150*/
151			return 0;
152		}
153		i++;
154	/* DELAY(100); */
155	s = STATUS(m);
156	}
157
158	if ((m->flags & M_TXEN) && (m->si) ) {
159	    callout_reset(&m->timer, 1, mpu401_timeout, m);
160	}
161
162	return (m->flags & M_TXEN) == M_TXEN;
163}
164
165struct mpu401 *
166mpu401_init(kobj_class_t cls, void *cookie,driver_intr_t softintr, mpu401_intr_t **cb)
167{
168	struct mpu401 *m;
169
170	*cb = NULL;
171	m = malloc(sizeof(*m), M_MIDI, M_NOWAIT | M_ZERO);
172
173	if(!m)
174		return NULL;
175
176	kobj_init((kobj_t)m, cls);
177
178	callout_init(&m->timer, 1);
179
180	m->si = softintr;
181	m->cookie = cookie;
182	m->flags = 0;
183
184	m->mid = midi_init(&mpu401_class,0,0,m);
185	if (!m->mid)
186		goto err;
187	*cb = mpu401_intr;
188	return m;
189err:
190	printf("mpu401_init error\n");
191	free(m, M_MIDI);
192	return NULL;
193}
194
195int
196mpu401_uninit(struct mpu401 *m)
197{
198	int retval;
199
200	CMD(m, MPU_RESET);
201	retval = midi_uninit(m->mid);
202	if (retval)
203		return retval;
204	free(m, M_MIDI);
205	return 0;
206}
207
208static int
209mpu401_minit(kobj_t obj, struct mpu401 *m)
210{
211	int i;
212
213	CMD(m, MPU_RESET);
214	CMD(m, MPU_UART);
215	return 0;
216	i=0;
217	while(++i<2000) {
218		if(RXRDY(m))
219			if(READ(m) == MPU_ACK)
220				break;
221	}
222
223	if( i < 2000 ) {
224		CMD(m, MPU_UART);
225		return 0;
226	}
227	printf("mpu401_minit failed active sensing\n");
228	return 1;
229}
230
231
232int
233mpu401_muninit(kobj_t obj, struct mpu401 *m)
234{
235
236	return MPUFOI_UNINIT(m, m->cookie);
237}
238
239int
240mpu401_minqsize(kobj_t obj, struct mpu401 *m)
241{
242	return 128;
243}
244
245int
246mpu401_moutqsize(kobj_t obj, struct mpu401 *m)
247{
248	return 128;
249}
250
251static void
252mpu401_mcallback(kobj_t obj, struct mpu401 *m, int flags)
253{
254#if 0
255	printf("mpu401_callback %s %s %s %s\n",
256		flags & M_RX ? "M_RX" : "",
257		flags & M_TX ? "M_TX" : "",
258		flags & M_RXEN ? "M_RXEN" : "",
259		flags & M_TXEN ? "M_TXEN" : "" );
260#endif
261	if (flags & M_TXEN && m->si) {
262		callout_reset(&m->timer, 1, mpu401_timeout, m);
263	}
264
265	m->flags = flags;
266}
267
268static void
269mpu401_mcallbackp(kobj_t obj, struct mpu401 *m, int flags)
270{
271/*	printf("mpu401_callbackp\n"); */
272	mpu401_mcallback(obj, m, flags);
273}
274
275static const char *
276mpu401_mdescr(kobj_t obj, struct mpu401 *m, int verbosity)
277{
278
279	return "descr mpu401";
280}
281
282static const char *
283mpu401_mprovider(kobj_t obj, struct mpu401 *m)
284{
285	return "provider mpu401";
286}
287