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 00000000000..fc57c6e72ac
--- /dev/null
+++ b/arch/m68k/amiga/pcmcia.c
@@ -0,0 +1,113 @@
+/*
+** 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;
+}