diff options
Diffstat (limited to 'arch/arm26/machine/latches.c')
-rw-r--r-- | arch/arm26/machine/latches.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/arm26/machine/latches.c b/arch/arm26/machine/latches.c new file mode 100644 index 000000000000..94f05d2a3b2b --- /dev/null +++ b/arch/arm26/machine/latches.c | |||
@@ -0,0 +1,72 @@ | |||
1 | /* | ||
2 | * linux/arch/arm26/kernel/latches.c | ||
3 | * | ||
4 | * Copyright (C) David Alan Gilbert 1995/1996,2000 | ||
5 | * Copyright (C) Ian Molton 2003 | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License version 2 as | ||
9 | * published by the Free Software Foundation. | ||
10 | * | ||
11 | * Support for the latches on the old Archimedes which control the floppy, | ||
12 | * hard disc and printer | ||
13 | */ | ||
14 | #include <linux/module.h> | ||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/init.h> | ||
17 | #include <linux/sched.h> | ||
18 | |||
19 | #include <asm/io.h> | ||
20 | #include <asm/hardware.h> | ||
21 | #include <asm/mach-types.h> | ||
22 | #include <asm/oldlatches.h> | ||
23 | |||
24 | static unsigned char latch_a_copy; | ||
25 | static unsigned char latch_b_copy; | ||
26 | |||
27 | /* newval=(oldval & ~mask)|newdata */ | ||
28 | void oldlatch_aupdate(unsigned char mask,unsigned char newdata) | ||
29 | { | ||
30 | unsigned long flags; | ||
31 | |||
32 | BUG_ON(!machine_is_archimedes()); | ||
33 | |||
34 | local_irq_save(flags); //FIXME: was local_save_flags | ||
35 | latch_a_copy = (latch_a_copy & ~mask) | newdata; | ||
36 | __raw_writeb(latch_a_copy, LATCHA_BASE); | ||
37 | local_irq_restore(flags); | ||
38 | |||
39 | printk("Latch: A = 0x%02x\n", latch_a_copy); | ||
40 | } | ||
41 | |||
42 | |||
43 | /* newval=(oldval & ~mask)|newdata */ | ||
44 | void oldlatch_bupdate(unsigned char mask,unsigned char newdata) | ||
45 | { | ||
46 | unsigned long flags; | ||
47 | |||
48 | BUG_ON(!machine_is_archimedes()); | ||
49 | |||
50 | |||
51 | local_irq_save(flags);//FIXME: was local_save_flags | ||
52 | latch_b_copy = (latch_b_copy & ~mask) | newdata; | ||
53 | __raw_writeb(latch_b_copy, LATCHB_BASE); | ||
54 | local_irq_restore(flags); | ||
55 | |||
56 | printk("Latch: B = 0x%02x\n", latch_b_copy); | ||
57 | } | ||
58 | |||
59 | static int __init oldlatch_init(void) | ||
60 | { | ||
61 | if (machine_is_archimedes()) { | ||
62 | oldlatch_aupdate(0xff, 0xff); | ||
63 | /* Thats no FDC reset...*/ | ||
64 | oldlatch_bupdate(0xff, LATCHB_FDCRESET); | ||
65 | } | ||
66 | return 0; | ||
67 | } | ||
68 | |||
69 | arch_initcall(oldlatch_init); | ||
70 | |||
71 | EXPORT_SYMBOL(oldlatch_aupdate); | ||
72 | EXPORT_SYMBOL(oldlatch_bupdate); | ||