You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
2.3 KiB
113 lines
2.3 KiB
/*
|
|
** asm-m68k/pcmcia.c -- Amiga Linux PCMCIA support
|
|
** most information was found by disassembling card.resource
|
|
** I'm still looking for an official doc !
|
|
**
|
|
** Copyright 1997 by Alain Malek
|
|
**
|
|
** This file is subject to the terms and conditions of the GNU General Public
|
|
** License. See the file COPYING in the main directory of this archive
|
|
** for more details.
|
|
**
|
|
** Created: 12/10/97 by Alain Malek
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/timer.h>
|
|
#include <asm/amigayle.h>
|
|
#include <asm/amipcmcia.h>
|
|
|
|
/* gayle config byte for program voltage and access speed */
|
|
static unsigned char cfg_byte = GAYLE_CFG_0V|GAYLE_CFG_150NS;
|
|
|
|
void pcmcia_reset(void)
|
|
{
|
|
unsigned long reset_start_time = jiffies;
|
|
unsigned char b;
|
|
|
|
gayle_reset = 0x00;
|
|
while (time_before(jiffies, reset_start_time + 1*HZ/100));
|
|
b = gayle_reset;
|
|
}
|
|
|
|
|
|
/* copy a tuple, including tuple header. return nb bytes copied */
|
|
/* be carefull as this may trigger a GAYLE_IRQ_WR interrupt ! */
|
|
|
|
int pcmcia_copy_tuple(unsigned char tuple_id, void *tuple, int max_len)
|
|
{
|
|
unsigned char id, *dest;
|
|
int cnt, pos, len;
|
|
|
|
dest = tuple;
|
|
pos = 0;
|
|
|
|
id = gayle_attribute[pos];
|
|
|
|
while((id != CISTPL_END) && (pos < 0x10000)) {
|
|
len = (int)gayle_attribute[pos+2] + 2;
|
|
if (id == tuple_id) {
|
|
len = (len > max_len)?max_len:len;
|
|
for (cnt = 0; cnt < len; cnt++) {
|
|
*dest++ = gayle_attribute[pos+(cnt<<1)];
|
|
}
|
|
|
|
return len;
|
|
}
|
|
pos += len<<1;
|
|
id = gayle_attribute[pos];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void pcmcia_program_voltage(int voltage)
|
|
{
|
|
unsigned char v;
|
|
|
|
switch (voltage) {
|
|
case PCMCIA_0V:
|
|
v = GAYLE_CFG_0V;
|
|
break;
|
|
case PCMCIA_5V:
|
|
v = GAYLE_CFG_5V;
|
|
break;
|
|
case PCMCIA_12V:
|
|
v = GAYLE_CFG_12V;
|
|
break;
|
|
default:
|
|
v = GAYLE_CFG_0V;
|
|
}
|
|
|
|
cfg_byte = (cfg_byte & 0xfc) | v;
|
|
gayle.config = cfg_byte;
|
|
|
|
}
|
|
|
|
void pcmcia_access_speed(int speed)
|
|
{
|
|
unsigned char s;
|
|
|
|
if (speed <= PCMCIA_SPEED_100NS)
|
|
s = GAYLE_CFG_100NS;
|
|
else if (speed <= PCMCIA_SPEED_150NS)
|
|
s = GAYLE_CFG_150NS;
|
|
else if (speed <= PCMCIA_SPEED_250NS)
|
|
s = GAYLE_CFG_250NS;
|
|
else
|
|
s = GAYLE_CFG_720NS;
|
|
|
|
cfg_byte = (cfg_byte & 0xf3) | s;
|
|
gayle.config = cfg_byte;
|
|
}
|
|
|
|
void pcmcia_write_enable(void)
|
|
{
|
|
gayle.cardstatus = GAYLE_CS_WR|GAYLE_CS_DA;
|
|
}
|
|
|
|
void pcmcia_write_disable(void)
|
|
{
|
|
gayle.cardstatus = 0;
|
|
}
|
|
|