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1da177e4 LT |
1 | /* |
2 | ********************************************************************** | |
3 | * cardmo.c - MIDI UART output HAL for emu10k1 driver | |
4 | * Copyright 1999, 2000 Creative Labs, Inc. | |
5 | * | |
6 | ********************************************************************** | |
7 | * | |
8 | * Date Author Summary of changes | |
9 | * ---- ------ ------------------ | |
10 | * October 20, 1999 Bertrand Lee base code release | |
11 | * November 2, 1999 Alan Cox cleaned up | |
12 | * | |
13 | ********************************************************************** | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License as | |
17 | * published by the Free Software Foundation; either version 2 of | |
18 | * the License, or (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public | |
26 | * License along with this program; if not, write to the Free | |
27 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, | |
28 | * USA. | |
29 | * | |
30 | ********************************************************************** | |
31 | */ | |
32 | ||
33 | #include <linux/slab.h> | |
34 | ||
35 | #include "hwaccess.h" | |
36 | #include "8010.h" | |
37 | #include "cardmo.h" | |
38 | #include "irqmgr.h" | |
39 | ||
40 | /* Installs the IRQ handler for the MPU out port * | |
41 | * and initialize parameters */ | |
42 | ||
43 | int emu10k1_mpuout_open(struct emu10k1_card *card, struct midi_openinfo *openinfo) | |
44 | { | |
45 | struct emu10k1_mpuout *card_mpuout = card->mpuout; | |
46 | ||
47 | DPF(2, "emu10k1_mpuout_open()\n"); | |
48 | ||
49 | if (!(card_mpuout->status & FLAGS_AVAILABLE)) | |
50 | return -1; | |
51 | ||
52 | /* Copy open info and mark channel as in use */ | |
53 | card_mpuout->intr = 0; | |
54 | card_mpuout->openinfo = *openinfo; | |
55 | card_mpuout->status &= ~FLAGS_AVAILABLE; | |
56 | card_mpuout->laststatus = 0x80; | |
57 | card_mpuout->firstmidiq = NULL; | |
58 | card_mpuout->lastmidiq = NULL; | |
59 | ||
60 | emu10k1_mpu_reset(card); | |
61 | emu10k1_mpu_acquire(card); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | int emu10k1_mpuout_close(struct emu10k1_card *card) | |
67 | { | |
68 | struct emu10k1_mpuout *card_mpuout = card->mpuout; | |
69 | struct midi_queue *midiq; | |
70 | struct midi_hdr *midihdr; | |
71 | unsigned long flags; | |
72 | ||
73 | DPF(2, "emu10k1_mpuout_close()\n"); | |
74 | ||
75 | emu10k1_irq_disable(card, card->is_audigy ? A_INTE_MIDITXENABLE : INTE_MIDITXENABLE); | |
76 | ||
77 | spin_lock_irqsave(&card_mpuout->lock, flags); | |
78 | ||
79 | while (card_mpuout->firstmidiq != NULL) { | |
80 | midiq = card_mpuout->firstmidiq; | |
81 | midihdr = (struct midi_hdr *) midiq->refdata; | |
82 | ||
83 | card_mpuout->firstmidiq = midiq->next; | |
84 | ||
85 | kfree(midihdr->data); | |
86 | kfree(midihdr); | |
87 | kfree(midiq); | |
88 | } | |
89 | ||
90 | card_mpuout->lastmidiq = NULL; | |
91 | ||
92 | emu10k1_mpu_release(card); | |
93 | ||
94 | card_mpuout->status |= FLAGS_AVAILABLE; | |
95 | ||
96 | spin_unlock_irqrestore(&card_mpuout->lock, flags); | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | /* If there isn't enough buffer space, reject Midi Buffer. * | |
102 | * Otherwise, disable TX, create object to hold Midi * | |
103 | * uffer, update buffer flags and other parameters * | |
104 | * before enabling TX again. */ | |
105 | ||
106 | int emu10k1_mpuout_add_buffer(struct emu10k1_card *card, struct midi_hdr *midihdr) | |
107 | { | |
108 | struct emu10k1_mpuout *card_mpuout = card->mpuout; | |
109 | struct midi_queue *midiq; | |
110 | unsigned long flags; | |
111 | ||
112 | DPF(2, "emu10k1_mpuout_add_buffer()\n"); | |
113 | ||
114 | if (card_mpuout->state == CARDMIDIOUT_STATE_SUSPEND) | |
115 | return 0; | |
116 | ||
117 | midihdr->flags |= MIDIBUF_INQUEUE; | |
118 | midihdr->flags &= ~MIDIBUF_DONE; | |
119 | ||
5cbded58 | 120 | if ((midiq = kmalloc(sizeof(struct midi_queue), GFP_KERNEL)) == NULL) { |
1da177e4 LT |
121 | /* Message lost */ |
122 | return -1; | |
123 | } | |
124 | ||
125 | midiq->next = NULL; | |
126 | midiq->qtype = 1; | |
127 | midiq->length = midihdr->bufferlength; | |
128 | midiq->sizeLeft = midihdr->bufferlength; | |
129 | midiq->midibyte = midihdr->data; | |
130 | ||
131 | midiq->refdata = (unsigned long) midihdr; | |
132 | ||
133 | spin_lock_irqsave(&card_mpuout->lock, flags); | |
134 | ||
135 | if (card_mpuout->firstmidiq == NULL) { | |
136 | card_mpuout->firstmidiq = midiq; | |
137 | card_mpuout->lastmidiq = midiq; | |
138 | } else { | |
139 | (card_mpuout->lastmidiq)->next = midiq; | |
140 | card_mpuout->lastmidiq = midiq; | |
141 | } | |
142 | ||
143 | card_mpuout->intr = 0; | |
144 | ||
145 | emu10k1_irq_enable(card, card->is_audigy ? A_INTE_MIDITXENABLE : INTE_MIDITXENABLE); | |
146 | ||
147 | spin_unlock_irqrestore(&card_mpuout->lock, flags); | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | void emu10k1_mpuout_bh(unsigned long refdata) | |
153 | { | |
154 | struct emu10k1_card *card = (struct emu10k1_card *) refdata; | |
155 | struct emu10k1_mpuout *card_mpuout = card->mpuout; | |
156 | int cByteSent = 0; | |
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 | if (emu10k1_mpu_write_data(card, *midiq->midibyte) < 0) { | |
168 | DPF(2, "emu10k1_mpuoutDpcCallback error!!\n"); | |
169 | } else { | |
170 | ++cByteSent; | |
171 | --midiq->sizeLeft; | |
172 | ++midiq->midibyte; | |
173 | } | |
174 | } | |
175 | ||
176 | if (midiq->sizeLeft == 0) { | |
177 | if (doneq == NULL) | |
178 | doneq = midiq; | |
179 | card_mpuout->firstmidiq = midiq->next; | |
180 | } else | |
181 | break; | |
182 | } | |
183 | ||
184 | if (card_mpuout->firstmidiq == NULL) | |
185 | card_mpuout->lastmidiq = NULL; | |
186 | ||
187 | if (doneq != NULL) { | |
188 | while (doneq != card_mpuout->firstmidiq) { | |
189 | unsigned long callback_msg[3]; | |
190 | ||
191 | midiq = doneq; | |
192 | doneq = midiq->next; | |
193 | ||
194 | if (midiq->qtype) { | |
195 | callback_msg[0] = 0; | |
196 | callback_msg[1] = midiq->length; | |
197 | callback_msg[2] = midiq->refdata; | |
198 | ||
199 | emu10k1_midi_callback(ICARDMIDI_OUTLONGDATA, card_mpuout->openinfo.refdata, callback_msg); | |
200 | } else if (((u8) midiq->refdata) < 0xF0 && ((u8) midiq->refdata) > 0x7F) | |
201 | card_mpuout->laststatus = (u8) midiq->refdata; | |
202 | ||
203 | kfree(midiq); | |
204 | } | |
205 | } | |
206 | ||
207 | if ((card_mpuout->firstmidiq != NULL) || cByteSent) { | |
208 | card_mpuout->intr = 0; | |
209 | emu10k1_irq_enable(card, card->is_audigy ? A_INTE_MIDITXENABLE : INTE_MIDITXENABLE); | |
210 | } | |
211 | ||
212 | spin_unlock_irqrestore(&card_mpuout->lock, flags); | |
213 | ||
214 | return; | |
215 | } | |
216 | ||
217 | int emu10k1_mpuout_irqhandler(struct emu10k1_card *card) | |
218 | { | |
219 | struct emu10k1_mpuout *card_mpuout = card->mpuout; | |
220 | ||
221 | DPF(4, "emu10k1_mpuout_irqhandler\n"); | |
222 | ||
223 | card_mpuout->intr = 1; | |
224 | emu10k1_irq_disable(card, card->is_audigy ? A_INTE_MIDITXENABLE : INTE_MIDITXENABLE); | |
225 | ||
226 | tasklet_hi_schedule(&card_mpuout->tasklet); | |
227 | ||
228 | return 0; | |
229 | } |