mpu401.c revision 158979 
1/*-
2 * (c) 2003 Mathew Kanner
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met: 1. Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer. 2.
8 * Redistributions in binary form must reproduce the above copyright notice,
9 * this list of conditions and the following disclaimer in the documentation
10 * and/or other materials provided with the distribution.
11 *
12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
13 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
14 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
15 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
16 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
17 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
18 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
19 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
20 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
21 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
22 * SUCH DAMAGE.
23 */
24
25#include <sys/cdefs.h>
26__FBSDID("$FreeBSD: head/sys/dev/sound/midi/mpu401.c 158979 2006-05-27 16:32:05Z netchild $");
27
28#include <sys/param.h>
29#include <sys/types.h>
30#include <sys/param.h>
31#include <sys/queue.h>
32#include <sys/kernel.h>
33#include <sys/lock.h>
34#include <sys/mutex.h>
35#include <sys/proc.h>
36#include <sys/systm.h>
37#include <sys/kobj.h>
38#include <sys/malloc.h>
39#include <sys/bus.h> /* to get driver_intr_t */
40
41#include <dev/sound/midi/mpu401.h>
42#include <dev/sound/midi/midi.h>
43
44#include "mpu_if.h"
45#include "mpufoi_if.h"
46
47#define MPU_DATAPORT   0
48#define MPU_CMDPORT    1
49#define MPU_STATPORT   1
50#define MPU_RESET      0xff
51#define MPU_UART       0x3f
52#define MPU_ACK        0xfe
53#define MPU_STATMASK   0xc0
54#define MPU_OUTPUTBUSY 0x40
55#define MPU_INPUTBUSY  0x80
56#define MPU_TRYDATA 50
57#define MPU_DELAY   2500
58
59#define CMD(m,d)	MPUFOI_WRITE(m, m->cookie, MPU_CMDPORT,d)
60#define STATUS(m)	MPUFOI_READ(m, m->cookie, MPU_STATPORT)
61#define READ(m)		MPUFOI_READ(m, m->cookie, MPU_DATAPORT)
62#define WRITE(m,d)	MPUFOI_WRITE(m, m->cookie, MPU_DATAPORT,d)
63
64struct mpu401 {
65	KOBJ_FIELDS;
66	struct snd_midi *mid;
67	int flags;
68	driver_intr_t *si;
69	void *cookie;
70	struct callout timer;
71};
72
73static void mpu401_timeout(void *m) ;
74static mpu401_intr_t mpu401_intr;
75
76static int mpu401_minit(kobj_t obj, struct mpu401 *m);
77static int mpu401_muninit(kobj_t obj, struct mpu401 *m);
78static int mpu401_minqsize(kobj_t obj, struct mpu401 *m);
79static int mpu401_moutqsize(kobj_t obj, struct mpu401 *m);
80static void mpu401_mcallback(kobj_t obj, struct mpu401 *m, int flags);
81static void mpu401_mcallbackp(kobj_t obj, struct mpu401 *m, int flags);
82static const char *mpu401_mdescr(kobj_t obj, struct mpu401 *m, int verbosity);
83static const char *mpu401_mprovider(kobj_t obj, struct mpu401 *m);
84
85static kobj_method_t mpu401_methods[] = {
86	KOBJMETHOD(mpu_init,mpu401_minit),
87	KOBJMETHOD(mpu_uninit,mpu401_muninit),
88	KOBJMETHOD(mpu_inqsize,mpu401_minqsize),
89	KOBJMETHOD(mpu_outqsize,mpu401_moutqsize),
90	KOBJMETHOD(mpu_callback,mpu401_mcallback),
91	KOBJMETHOD(mpu_callbackp,mpu401_mcallbackp),
92	KOBJMETHOD(mpu_descr,mpu401_mdescr),
93	KOBJMETHOD(mpu_provider,mpu401_mprovider),
94        { 0, 0 }
95};
96
97DEFINE_CLASS(mpu401, mpu401_methods, 0);
98
99void
100mpu401_timeout(void *a)
101{	struct mpu401 *m=(struct mpu401 *)a;
102
103	if (m->si)
104		(m->si)(m->cookie);
105
106}
107static int
108mpu401_intr(struct mpu401 *m)
109{
110#define MPU_INTR_BUF	16
111	MIDI_TYPE b[MPU_INTR_BUF];
112	int i;
113	int s;
114/*
115	printf("mpu401_intr\n");
116*/
117#define RXRDY(m) ( (STATUS(m) & MPU_INPUTBUSY) == 0)
118#define TXRDY(m) ( (STATUS(m) & MPU_OUTPUTBUSY) == 0)
119#if 0
120#define D(x,l) printf("mpu401_intr %d %x %s %s\n",l, x, x&MPU_INPUTBUSY?"RX":"", x&MPU_OUTPUTBUSY?"TX":"")
121#else
122#define D(x,l)
123#endif
124	i=0;
125	s = STATUS(m);
126	D(s,1);
127	while ( (s&MPU_INPUTBUSY) == 0 && i<MPU_INTR_BUF) {
128		b[i]=READ(m);
129/*
130		printf("mpu401_intr in i %d d %d\n", i, b[i]);
131*/
132		i++;
133	s = STATUS(m);
134	}
135	if (i) midi_in(m->mid, b, i);
136	i=0;
137	while ( !(s&MPU_OUTPUTBUSY) && i<MPU_INTR_BUF) {
138		if(midi_out(m->mid, b, 1)) {
139/*
140			printf("mpu401_intr out i %d d %d\n", i, b[0]);
141*/
142
143			WRITE(m, *b);
144		}
145		else {
146/*
147			printf("mpu401_intr write: no output\n");
148*/
149			return 0;
150		}
151		i++;
152	/* DELAY(100); */
153	s = STATUS(m);
154	}
155
156	if ((m->flags & M_TXEN) && (m->si) ) {
157	    callout_reset(&m->timer, 1, mpu401_timeout, m);
158	}
159
160	return (m->flags & M_TXEN) == M_TXEN;
161}
162
163struct mpu401 *
164mpu401_init(kobj_class_t cls, void *cookie,driver_intr_t softintr, mpu401_intr_t **cb)
165{
166	struct mpu401 *m;
167
168	*cb = NULL;
169	m = malloc(sizeof(*m), M_MIDI, M_NOWAIT | M_ZERO);
170
171	if(!m)
172		return NULL;
173
174	kobj_init((kobj_t)m, cls);
175
176	callout_init(&m->timer, 1);
177
178	m->si = softintr;
179	m->cookie = cookie;
180	m->flags = 0;
181
182	m->mid = midi_init(&mpu401_class,0,0,m);
183	if (!m->mid)
184		goto err;
185	*cb = mpu401_intr;
186	return m;
187err:
188	printf("mpu401_init error\n");
189	free(m, M_MIDI);
190	return NULL;
191}
192
193int
194mpu401_uninit(struct mpu401 *m)
195{
196	int retval;
197
198	CMD(m, MPU_RESET);
199	retval = midi_uninit(m->mid);
200	if (retval)
201		return retval;
202	free(m, M_MIDI);
203	return 0;
204}
205
206static int
207mpu401_minit(kobj_t obj, struct mpu401 *m)
208{
209	int i;
210
211	CMD(m, MPU_RESET);
212	CMD(m, MPU_UART);
213	return 0;
214	i=0;
215	while(++i<2000) {
216		if(RXRDY(m))
217			if(READ(m) == MPU_ACK)
218				break;
219	}
220
221	if( i < 2000 ) {
222		CMD(m, MPU_UART);
223		return 0;
224	}
225	printf("mpu401_minit failed active sensing\n");
226	return 1;
227}
228
229
230int
231mpu401_muninit(kobj_t obj, struct mpu401 *m)
232{
233
234	return MPUFOI_UNINIT(m, m->cookie);
235}
236
237int
238mpu401_minqsize(kobj_t obj, struct mpu401 *m)
239{
240	return 128;
241}
242
243int
244mpu401_moutqsize(kobj_t obj, struct mpu401 *m)
245{
246	return 128;
247}
248
249static void
250mpu401_mcallback(kobj_t obj, struct mpu401 *m, int flags)
251{
252#if 0
253	printf("mpu401_callback %s %s %s %s\n",
254		flags & M_RX ? "M_RX" : "",
255		flags & M_TX ? "M_TX" : "",
256		flags & M_RXEN ? "M_RXEN" : "",
257		flags & M_TXEN ? "M_TXEN" : "" );
258#endif
259	if (flags & M_TXEN && m->si) {
260		callout_reset(&m->timer, 1, mpu401_timeout, m);
261	}
262
263	m->flags = flags;
264}
265
266static void
267mpu401_mcallbackp(kobj_t obj, struct mpu401 *m, int flags)
268{
269/*	printf("mpu401_callbackp\n"); */
270	mpu401_mcallback(obj, m, flags);
271}
272
273static const char *
274mpu401_mdescr(kobj_t obj, struct mpu401 *m, int verbosity)
275{
276
277	return "descr mpu401";
278}
279
280static const char *
281mpu401_mprovider(kobj_t obj, struct mpu401 *m)
282{
283	return "provider mpu401";
284}
285