1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/ata/pata_parport/on20.c b/drivers/ata/pata_parport/on20.c
new file mode 100644
index 000000000000..995fc41e3122
--- /dev/null
+++ b/drivers/ata/pata_parport/on20.c
@@ -0,0 +1,153 @@
+/* 
+	on20.c	(c) 1996-8  Grant R. Guenther <grant@torque.net>
+		            Under the terms of the GNU General Public License.
+
+        on20.c is a low-level protocol driver for the
+        Onspec 90c20 parallel to IDE adapter. 
+*/
+
+/* Changes:
+
+        1.01    GRG 1998.05.06 init_proto, release_proto
+
+*/
+
+#define	ON20_VERSION	"1.01"
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+#include <asm/io.h>
+
+#include <linux/pata_parport.h>
+
+#define op(f)	w2(4);w0(f);w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
+#define vl(v)	w2(4);w0(v);w2(5);w2(7);w2(5);w2(4);
+
+#define j44(a,b)  (((a>>4)&0x0f)|(b&0xf0))
+
+/* cont = 0 - access the IDE register file 
+   cont = 1 - access the IDE command set 
+*/
+
+static int on20_read_regr( PIA *pi, int cont, int regr )
+
+{	int h,l, r ;
+
+        r = (regr<<2) + 1 + cont;
+
+        op(1); vl(r); op(0);
+
+	switch (pi->mode)  {
+
+        case 0:  w2(4); w2(6); l = r1();
+                 w2(4); w2(6); h = r1();
+                 w2(4); w2(6); w2(4); w2(6); w2(4);
+		 return j44(l,h);
+
+	case 1:  w2(4); w2(0x26); r = r0(); 
+                 w2(4); w2(0x26); w2(4);
+		 return r;
+
+	}
+	return -1;
+}	
+
+static void on20_write_regr( PIA *pi, int cont, int regr, int val )
+
+{	int r;
+
+	r = (regr<<2) + 1 + cont;
+
+	op(1); vl(r); 
+	op(0); vl(val); 
+	op(0); vl(val);
+}
+
+static void on20_connect ( PIA *pi)
+
+{	pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+
+	w2(4);w0(0);w2(0xc);w2(4);w2(6);w2(4);w2(6);w2(4); 
+	if (pi->mode) { op(2); vl(8); op(2); vl(9); }
+	       else   { op(2); vl(0); op(2); vl(8); }
+}
+
+static void on20_disconnect ( PIA *pi )
+
+{	w2(4);w0(7);w2(4);w2(0xc);w2(4);
+        w0(pi->saved_r0);
+        w2(pi->saved_r2);
+} 
+
+static void on20_read_block( PIA *pi, char * buf, int count )
+
+{	int     k, l, h; 
+
+	op(1); vl(1); op(0);
+
+	for (k=0;k<count;k++) 
+	    if (pi->mode) {
+		w2(4); w2(0x26); buf[k] = r0();
+	    } else {
+		w2(6); l = r1(); w2(4);
+		w2(6); h = r1(); w2(4);
+		buf[k] = j44(l,h);
+	    }
+	w2(4);
+}
+
+static void on20_write_block(  PIA *pi, char * buf, int count )
+
+{	int	k;
+
+	op(1); vl(1); op(0);
+
+	for (k=0;k<count;k++) { w2(5); w0(buf[k]); w2(7); }
+	w2(4);
+}
+
+static void on20_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{       char    *mode_string[2] = {"4-bit","8-bit"};
+
+        printk("%s: on20 %s, OnSpec 90c20 at 0x%x, ",
+                pi->device,ON20_VERSION,pi->port);
+        printk("mode %d (%s), delay %d\n",pi->mode,
+		mode_string[pi->mode],pi->delay);
+
+}
+
+static struct pi_protocol on20 = {
+	.owner		= THIS_MODULE,
+	.name		= "on20",
+	.max_mode	= 2,
+	.epp_first	= 2,
+	.default_delay	= 1,
+	.max_units	= 1,
+	.write_regr	= on20_write_regr,
+	.read_regr	= on20_read_regr,
+	.write_block	= on20_write_block,
+	.read_block	= on20_read_block,
+	.connect	= on20_connect,
+	.disconnect	= on20_disconnect,
+	.log_adapter	= on20_log_adapter,
+};
+
+static int __init on20_init(void)
+{
+	return paride_register(&on20);
+}
+
+static void __exit on20_exit(void)
+{
+	paride_unregister(&on20);
+}
+
+MODULE_LICENSE("GPL");
+module_init(on20_init)
+module_exit(on20_exit)