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1da177e4 LT |
1 | /* |
2 | ********************************************************************** | |
3 | * irqmgr.c - IRQ manager 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 | * | |
12 | ********************************************************************** | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or | |
15 | * modify it under the terms of the GNU General Public License as | |
16 | * published by the Free Software Foundation; either version 2 of | |
17 | * the License, or (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public | |
25 | * License along with this program; if not, write to the Free | |
26 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, | |
27 | * USA. | |
28 | * | |
29 | ********************************************************************** | |
30 | */ | |
31 | ||
32 | #include "hwaccess.h" | |
33 | #include "8010.h" | |
34 | #include "cardmi.h" | |
35 | #include "cardmo.h" | |
36 | #include "irqmgr.h" | |
37 | ||
38 | /* Interrupt handler */ | |
39 | ||
7d12e780 | 40 | irqreturn_t emu10k1_interrupt(int irq, void *dev_id) |
1da177e4 LT |
41 | { |
42 | struct emu10k1_card *card = (struct emu10k1_card *) dev_id; | |
43 | u32 irqstatus, irqstatus_tmp; | |
44 | int handled = 0; | |
45 | ||
46 | DPD(4, "emu10k1_interrupt called, irq = %u\n", irq); | |
47 | ||
48 | /* | |
49 | ** NOTE : | |
50 | ** We do a 'while loop' here cos on certain machines, with both | |
51 | ** playback and recording going on at the same time, IRQs will | |
52 | ** stop coming in after a while. Checking IPND indeed shows that | |
53 | ** there are interrupts pending but the PIC says no IRQs pending. | |
54 | ** I suspect that some boards need edge-triggered IRQs but are not | |
55 | ** getting that condition if we don't completely clear the IPND | |
56 | ** (make sure no more interrupts are pending). | |
57 | ** - Eric | |
58 | */ | |
59 | ||
60 | while ((irqstatus = inl(card->iobase + IPR))) { | |
61 | DPD(4, "irq status %#x\n", irqstatus); | |
62 | ||
63 | irqstatus_tmp = irqstatus; | |
64 | ||
65 | if (irqstatus & IRQTYPE_TIMER) { | |
66 | emu10k1_timer_irqhandler(card); | |
67 | irqstatus &= ~IRQTYPE_TIMER; | |
68 | } | |
69 | ||
70 | if (irqstatus & IRQTYPE_DSP) { | |
71 | emu10k1_dsp_irqhandler(card); | |
72 | irqstatus &= ~IRQTYPE_DSP; | |
73 | } | |
74 | ||
75 | if (irqstatus & IRQTYPE_MPUIN) { | |
76 | emu10k1_mpuin_irqhandler(card); | |
77 | irqstatus &= ~IRQTYPE_MPUIN; | |
78 | } | |
79 | ||
80 | if (irqstatus & IRQTYPE_MPUOUT) { | |
81 | emu10k1_mpuout_irqhandler(card); | |
82 | irqstatus &= ~IRQTYPE_MPUOUT; | |
83 | } | |
84 | ||
85 | if (irqstatus & IPR_MUTE) { | |
86 | emu10k1_mute_irqhandler(card); | |
87 | irqstatus &=~IPR_MUTE; | |
88 | } | |
89 | ||
90 | if (irqstatus & IPR_VOLINCR) { | |
91 | emu10k1_volincr_irqhandler(card); | |
92 | irqstatus &=~IPR_VOLINCR; | |
93 | } | |
94 | ||
95 | if (irqstatus & IPR_VOLDECR) { | |
96 | emu10k1_voldecr_irqhandler(card); | |
97 | irqstatus &=~IPR_VOLDECR; | |
98 | } | |
99 | ||
100 | if (irqstatus){ | |
101 | printk(KERN_ERR "emu10k1: Warning, unhandled interrupt: %#08x\n", irqstatus); | |
102 | //make sure any interrupts we don't handle are disabled: | |
103 | emu10k1_irq_disable(card, ~(INTE_MIDIRXENABLE | INTE_MIDITXENABLE | INTE_INTERVALTIMERENB | | |
104 | INTE_VOLDECRENABLE | INTE_VOLINCRENABLE | INTE_MUTEENABLE | | |
105 | INTE_FXDSPENABLE)); | |
106 | } | |
107 | ||
108 | /* acknowledge interrupt */ | |
109 | outl(irqstatus_tmp, card->iobase + IPR); | |
110 | handled = 1; | |
111 | } | |
112 | return IRQ_RETVAL(handled); | |
113 | } |