[PATCH] m68k: indent sys_ptrace
[linux-2.6.git] / arch / m68k / amiga / pcmcia.c
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 }