patch-2.1.77 linux/drivers/block/paride/on20.c

• Lines: 158
• Date: Sun Dec 28 12:05:45 1997
• Orig file: v2.1.76/linux/drivers/block/paride/on20.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.76/linux/drivers/block/paride/on20.c linux/drivers/block/paride/on20.c
@@ -0,0 +1,157 @@
+/* 
+	on20.c	(c) 1996  Grant R. Guenther <grant@torque.net>
+		          Under the terms of the GNU public license.
+
+        on20.c is a low-level protocol driver for the
+        Onspec 90c20 parallel to IDE adapter. 
+*/
+
+#define	ON20_VERSION	"1.0"
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <asm/io.h>
+
+#include "paride.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 void on20_inc_use ( void )
+
+{       MOD_INC_USE_COUNT;
+}
+
+static void on20_dec_use ( void )
+
+{       MOD_DEC_USE_COUNT;
+}
+
+struct pi_protocol on20 = {"on20",0,2,2,1,1,
+                           on20_write_regr,
+                           on20_read_regr,
+                           on20_write_block,
+                           on20_read_block,
+                           on20_connect,
+                           on20_disconnect,
+                           0,
+                           0,
+                           0,
+                           on20_log_adapter,
+                           on20_inc_use, 
+                           on20_dec_use 
+                          };
+
+
+#ifdef MODULE
+
+int     init_module(void)
+
+{       return pi_register( &on20 ) - 1;
+}
+
+void    cleanup_module(void)
+
+{       pi_unregister( &on20 );
+}
+
+#endif
+
+/* end of on20.c */