source: sbliveos2/trunk/sblive/cardmo.c@ 172

Last change on this file since 172 was 142, checked in by ktk, 25 years ago

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1/* $Id: cardmo.c 142 2000-04-23 14:55:46Z ktk $ */
2
3
4/*
5 **********************************************************************
6 * cardmo.c - MIDI UART output HAL for emu10k1 driver
7 * Copyright 1999, 2000 Creative Labs, Inc.
8 *
9 **********************************************************************
10 *
11 * Date Author Summary of changes
12 * ---- ------ ------------------
13 * October 20, 1999 Bertrand Lee base code release
14 * November 2, 1999 Alan Cox cleaned up
15 *
16 **********************************************************************
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
21 * the License, or (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public
29 * License along with this program; if not, write to the Free
30 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
31 * USA.
32 *
33 **********************************************************************
34 */
35
36#include "hwaccess.h"
37#include "cardmo.h"
38
39/* Installs the IRQ handler for the MPU out port *
40 * and initialize parameters */
41
42int emu10k1_mpuout_open(struct emu10k1_card *card, struct midi_openinfo *openinfo)
43{
44 struct emu10k1_mpuout *card_mpuout = card->mpuout;
45
46 DPF(2, "emu10k1_mpuout_open()\n");
47
48 if (!(card_mpuout->status & FLAGS_AVAILABLE))
49 return CTSTATUS_INUSE;
50
51 /* Copy open info and mark channel as in use */
52 card_mpuout->intr = 0;
53 card_mpuout->openinfo = *openinfo;
54 card_mpuout->status &= ~FLAGS_AVAILABLE;
55 card_mpuout->laststatus = 0x80;
56 card_mpuout->firstmidiq = NULL;
57 card_mpuout->lastmidiq = NULL;
58
59 emu10k1_mpu_reset(card);
60 emu10k1_mpu_acquire(card);
61
62 return CTSTATUS_SUCCESS;
63}
64
65int emu10k1_mpuout_close(struct emu10k1_card *card)
66{
67 struct emu10k1_mpuout *card_mpuout = card->mpuout;
68 struct midi_queue *midiq;
69 struct midi_hdr *midihdr;
70 unsigned long flags;
71
72 DPF(2, "emu10k1_mpuout_close()\n");
73
74 emu10k1_irq_disable(card, INTE_MIDITXENABLE);
75
76 spin_lock_irqsave(&card_mpuout->lock, flags);
77
78 while (card_mpuout->firstmidiq != NULL) {
79 midiq = card_mpuout->firstmidiq;
80 midihdr = (struct midi_hdr *) midiq->refdata;
81
82 card_mpuout->firstmidiq = midiq->next;
83
84 kfree(midihdr->data);
85 kfree(midihdr);
86 kfree(midiq);
87 }
88
89 card_mpuout->lastmidiq = NULL;
90
91 emu10k1_mpu_release(card);
92
93 card_mpuout->status |= FLAGS_AVAILABLE;
94
95 spin_unlock_irqrestore(&card_mpuout->lock, flags);
96
97 return CTSTATUS_SUCCESS;
98}
99
100/* If there isn't enough buffer space, reject Midi Buffer. *
101* Otherwise, disable TX, create object to hold Midi *
102* uffer, update buffer flags and other parameters *
103* before enabling TX again. */
104
105int emu10k1_mpuout_add_buffer(struct emu10k1_card *card, struct midi_hdr *midihdr)
106{
107 struct emu10k1_mpuout *card_mpuout = card->mpuout;
108 struct midi_queue *midiq;
109 unsigned long flags;
110
111 DPF(2, "emu10k1_mpuout_add_buffer()\n");
112
113 if (card_mpuout->state == CARDMIDIOUT_STATE_SUSPEND)
114 return CTSTATUS_SUCCESS;
115
116 midihdr->flags |= MIDIBUF_INQUEUE;
117 midihdr->flags &= ~MIDIBUF_DONE;
118
119 if ((midiq = (struct midi_queue *) kmalloc(sizeof(struct midi_queue), GFP_KERNEL)) == NULL) {
120 /* Message lost */
121 return CTSTATUS_NOMEMORY;
122 }
123
124 midiq->next = NULL;
125 midiq->qtype = 1;
126 midiq->length = midihdr->bufferlength;
127 midiq->sizeLeft = midihdr->bufferlength;
128 midiq->midibyte = midihdr->data;
129
130 midiq->refdata = (unsigned long) midihdr;
131
132 spin_lock_irqsave(&card_mpuout->lock, flags);
133
134 if (card_mpuout->firstmidiq == NULL) {
135 card_mpuout->firstmidiq = midiq;
136 card_mpuout->lastmidiq = midiq;
137 } else {
138 (card_mpuout->lastmidiq)->next = midiq;
139 card_mpuout->lastmidiq = midiq;
140 }
141
142 card_mpuout->intr = 0;
143
144 emu10k1_irq_enable(card, INTE_MIDITXENABLE);
145
146 spin_unlock_irqrestore(&card_mpuout->lock, flags);
147
148 return CTSTATUS_SUCCESS;
149}
150
151void emu10k1_mpuout_bh(unsigned long refdata)
152{
153 struct emu10k1_card *card = (struct emu10k1_card *) refdata;
154 struct emu10k1_mpuout *card_mpuout = card->mpuout;
155 int cByteSent = 0;
156 int status;
157 struct midi_queue *midiq;
158 struct midi_queue *doneq = NULL;
159 unsigned long flags;
160
161 spin_lock_irqsave(&card_mpuout->lock, flags);
162
163 while (card_mpuout->firstmidiq != NULL) {
164 midiq = card_mpuout->firstmidiq;
165
166 while (cByteSent < 4 && midiq->sizeLeft) {
167 status = emu10k1_mpu_write_data(card, *midiq->midibyte);
168
169 if (status == CTSTATUS_SUCCESS) {
170 ++cByteSent;
171 --midiq->sizeLeft;
172 ++midiq->midibyte;
173 } else {
174 DPF(2, "emu10k1_mpuoutDpcCallback error!!\n");
175 }
176 }
177
178 if (midiq->sizeLeft == 0) {
179 if (doneq == NULL)
180 doneq = midiq;
181 card_mpuout->firstmidiq = midiq->next;
182 } else
183 break;
184 }
185
186 if (card_mpuout->firstmidiq == NULL)
187 card_mpuout->lastmidiq = NULL;
188
189 if (doneq != NULL) {
190 while (doneq != card_mpuout->firstmidiq) {
191 unsigned long callback_msg[3];
192
193 midiq = doneq;
194 doneq = midiq->next;
195
196 if (midiq->qtype) {
197 callback_msg[0] = 0;
198 callback_msg[1] = midiq->length;
199 callback_msg[2] = midiq->refdata;
200
201 emu10k1_midi_callback(ICARDMIDI_OUTLONGDATA, card_mpuout->openinfo.refdata, callback_msg);
202 } else if (((u8) midiq->refdata) < 0xF0 && ((u8) midiq->refdata) > 0x7F)
203 card_mpuout->laststatus = (u8) midiq->refdata;
204
205 kfree(midiq);
206 }
207 }
208
209 if ((card_mpuout->firstmidiq != NULL) || cByteSent) {
210 card_mpuout->intr = 0;
211 emu10k1_irq_enable(card, INTE_MIDITXENABLE);
212 }
213
214 spin_unlock_irqrestore(&card_mpuout->lock, flags);
215
216 return;
217}
218
219int emu10k1_mpuout_irqhandler(struct emu10k1_card *card)
220{
221 struct emu10k1_mpuout *card_mpuout = card->mpuout;
222
223 DPF(4, "emu10k1_mpuout_irqhandler\n");
224
225 card_mpuout->intr = 1;
226 emu10k1_irq_disable(card, INTE_MIDITXENABLE);
227
228 tasklet_hi_schedule(&card_mpuout->tasklet);
229
230 return CTSTATUS_SUCCESS;
231}
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