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Diffstat (limited to 'firmware/target/sh/archos/timer-archos.c')
-rw-r--r--firmware/target/sh/archos/timer-archos.c84
1 files changed, 0 insertions, 84 deletions
diff --git a/firmware/target/sh/archos/timer-archos.c b/firmware/target/sh/archos/timer-archos.c
deleted file mode 100644
index 98a3afb4b6..0000000000
--- a/firmware/target/sh/archos/timer-archos.c
+++ /dev/null
@@ -1,84 +0,0 @@
1/***************************************************************************
2* __________ __ ___.
3* Open \______ \ ____ ____ | | _\_ |__ _______ ___
4* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7* \/ \/ \/ \/ \/
8* $Id$
9*
10* Copyright (C) 2005 Jens Arnold
11*
12* This program is free software; you can redistribute it and/or
13* modify it under the terms of the GNU General Public License
14* as published by the Free Software Foundation; either version 2
15* of the License, or (at your option) any later version.
16*
17* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18* KIND, either express or implied.
19*
20****************************************************************************/
21
22#include "cpu.h"
23#include "system.h"
24#include "timer.h"
25
26void IMIA4(void) __attribute__((interrupt_handler));
27void IMIA4(void)
28{
29 if (pfn_timer != NULL)
30 pfn_timer();
31 and_b(~0x01, &TSR4); /* clear the interrupt */
32}
33
34bool timer_set(long cycles, bool start)
35{
36 int phi = 0; /* bits for the prescaler */
37 int prescale = 1;
38
39 while (cycles > 0x10000)
40 { /* work out the smallest prescaler that makes it fit */
41 phi++;
42 prescale <<= 1;
43 cycles >>= 1;
44 }
45
46 if (prescale > 8)
47 return false;
48
49 if (start)
50 {
51 if (pfn_unregister != NULL)
52 {
53 pfn_unregister();
54 pfn_unregister = NULL;
55 }
56
57 and_b(~0x10, &TSTR); /* Stop the timer 4 */
58 and_b(~0x10, &TSNC); /* No synchronization */
59 and_b(~0x10, &TMDR); /* Operate normally */
60
61 TIER4 = 0xF9; /* Enable GRA match interrupt */
62 }
63
64 TCR4 = 0x20 | phi; /* clear at GRA match, set prescaler */
65 GRA4 = (unsigned short)(cycles - 1);
66 if (start || (TCNT4 >= GRA4))
67 TCNT4 = 0;
68 and_b(~0x01, &TSR4); /* clear an eventual interrupt */
69
70 return true;
71}
72
73bool timer_start(void)
74{
75 IPRD = (IPRD & 0xFF0F) | 1 << 4; /* interrupt priority */
76 or_b(0x10, &TSTR); /* start timer 4 */
77 return true;
78}
79
80void timer_stop(void)
81{
82 and_b(~0x10, &TSTR); /* stop the timer 4 */
83 IPRD = (IPRD & 0xFF0F); /* disable interrupt */
84}