diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/amiga/pcmcia.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m68k/amiga/pcmcia.c')
-rw-r--r-- | arch/m68k/amiga/pcmcia.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/arch/m68k/amiga/pcmcia.c b/arch/m68k/amiga/pcmcia.c new file mode 100644 index 000000000000..fc57c6e72acf --- /dev/null +++ b/arch/m68k/amiga/pcmcia.c | |||
@@ -0,0 +1,113 @@ | |||
1 | /* | ||
2 | ** asm-m68k/pcmcia.c -- Amiga Linux PCMCIA support | ||
3 | ** most information was found by disassembling card.resource | ||
4 | ** I'm still looking for an official doc ! | ||
5 | ** | ||
6 | ** Copyright 1997 by Alain Malek | ||
7 | ** | ||
8 | ** This file is subject to the terms and conditions of the GNU General Public | ||
9 | ** License. See the file COPYING in the main directory of this archive | ||
10 | ** for more details. | ||
11 | ** | ||
12 | ** Created: 12/10/97 by Alain Malek | ||
13 | */ | ||
14 | |||
15 | #include <linux/types.h> | ||
16 | #include <linux/jiffies.h> | ||
17 | #include <linux/timer.h> | ||
18 | #include <asm/amigayle.h> | ||
19 | #include <asm/amipcmcia.h> | ||
20 | |||
21 | /* gayle config byte for program voltage and access speed */ | ||
22 | static unsigned char cfg_byte = GAYLE_CFG_0V|GAYLE_CFG_150NS; | ||
23 | |||
24 | void pcmcia_reset(void) | ||
25 | { | ||
26 | unsigned long reset_start_time = jiffies; | ||
27 | unsigned char b; | ||
28 | |||
29 | gayle_reset = 0x00; | ||
30 | while (time_before(jiffies, reset_start_time + 1*HZ/100)); | ||
31 | b = gayle_reset; | ||
32 | } | ||
33 | |||
34 | |||
35 | /* copy a tuple, including tuple header. return nb bytes copied */ | ||
36 | /* be carefull as this may trigger a GAYLE_IRQ_WR interrupt ! */ | ||
37 | |||
38 | int pcmcia_copy_tuple(unsigned char tuple_id, void *tuple, int max_len) | ||
39 | { | ||
40 | unsigned char id, *dest; | ||
41 | int cnt, pos, len; | ||
42 | |||
43 | dest = tuple; | ||
44 | pos = 0; | ||
45 | |||
46 | id = gayle_attribute[pos]; | ||
47 | |||
48 | while((id != CISTPL_END) && (pos < 0x10000)) { | ||
49 | len = (int)gayle_attribute[pos+2] + 2; | ||
50 | if (id == tuple_id) { | ||
51 | len = (len > max_len)?max_len:len; | ||
52 | for (cnt = 0; cnt < len; cnt++) { | ||
53 | *dest++ = gayle_attribute[pos+(cnt<<1)]; | ||
54 | } | ||
55 | |||
56 | return len; | ||
57 | } | ||
58 | pos += len<<1; | ||
59 | id = gayle_attribute[pos]; | ||
60 | } | ||
61 | |||
62 | return 0; | ||
63 | } | ||
64 | |||
65 | void pcmcia_program_voltage(int voltage) | ||
66 | { | ||
67 | unsigned char v; | ||
68 | |||
69 | switch (voltage) { | ||
70 | case PCMCIA_0V: | ||
71 | v = GAYLE_CFG_0V; | ||
72 | break; | ||
73 | case PCMCIA_5V: | ||
74 | v = GAYLE_CFG_5V; | ||
75 | break; | ||
76 | case PCMCIA_12V: | ||
77 | v = GAYLE_CFG_12V; | ||
78 | break; | ||
79 | default: | ||
80 | v = GAYLE_CFG_0V; | ||
81 | } | ||
82 | |||
83 | cfg_byte = (cfg_byte & 0xfc) | v; | ||
84 | gayle.config = cfg_byte; | ||
85 | |||
86 | } | ||
87 | |||
88 | void pcmcia_access_speed(int speed) | ||
89 | { | ||
90 | unsigned char s; | ||
91 | |||
92 | if (speed <= PCMCIA_SPEED_100NS) | ||
93 | s = GAYLE_CFG_100NS; | ||
94 | else if (speed <= PCMCIA_SPEED_150NS) | ||
95 | s = GAYLE_CFG_150NS; | ||
96 | else if (speed <= PCMCIA_SPEED_250NS) | ||
97 | s = GAYLE_CFG_250NS; | ||
98 | else | ||
99 | s = GAYLE_CFG_720NS; | ||
100 | |||
101 | cfg_byte = (cfg_byte & 0xf3) | s; | ||
102 | gayle.config = cfg_byte; | ||
103 | } | ||
104 | |||
105 | void pcmcia_write_enable(void) | ||
106 | { | ||
107 | gayle.cardstatus = GAYLE_CS_WR|GAYLE_CS_DA; | ||
108 | } | ||
109 | |||
110 | void pcmcia_write_disable(void) | ||
111 | { | ||
112 | gayle.cardstatus = 0; | ||
113 | } | ||