patch-2.0.35 linux/drivers/block/paride/aten.c

• Lines: 173
• Date: Mon Jul 13 13:47:28 1998
• Orig file: v2.0.34/linux/drivers/block/paride/aten.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.0.34/linux/drivers/block/paride/aten.c linux/drivers/block/paride/aten.c
@@ -0,0 +1,172 @@
+/* 
+        aten.c  (c) 1997-8  Grant R. Guenther <grant@torque.net>
+                            Under the terms of the GNU public license.
+
+	aten.c is a low-level protocol driver for the ATEN EH-100
+	parallel port adapter.  The EH-100 supports 4-bit and 8-bit
+        modes only.  There is also an EH-132 which supports EPP mode
+        transfers.  The EH-132 is not yet supported.
+
+*/
+
+/* Changes:
+
+	1.01	GRG 1998.05.05	init_proto, release_proto
+
+*/
+
+#define ATEN_VERSION      "1.01"
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <asm/io.h>
+
+#include "paride.h"
+
+#define j44(a,b)                ((((a>>4)&0x0f)|(b&0xf0))^0x88)
+
+/* cont = 0 - access the IDE register file 
+   cont = 1 - access the IDE command set 
+*/
+
+static int  cont_map[2] = { 0x08, 0x20 };
+
+static void  aten_write_regr( PIA *pi, int cont, int regr, int val)
+
+{	int r;
+
+	r = regr + cont_map[cont] + 0x80;
+
+	w0(r); w2(0xe); w2(6); w0(val); w2(7); w2(6); w2(0xc);
+}
+
+static int aten_read_regr( PIA *pi, int cont, int regr )
+
+{	int  a, b, r;
+
+        r = regr + cont_map[cont] + 0x40;
+
+	switch (pi->mode) {
+
+        case 0: w0(r); w2(0xe); w2(6); 
+		w2(7); w2(6); w2(0);
+		a = r1(); w0(0x10); b = r1(); w2(0xc);
+		return j44(a,b);
+
+        case 1: r |= 0x10;
+		w0(r); w2(0xe); w2(6); w0(0xff); 
+		w2(0x27); w2(0x26); w2(0x20);
+		a = r0();
+		w2(0x26); w2(0xc);
+		return a;
+	}
+	return -1;
+}
+
+static void aten_read_block( PIA *pi, char * buf, int count )
+
+{	int  k, a, b, c, d;
+
+	switch (pi->mode) {
+
+	case 0:	w0(0x48); w2(0xe); w2(6);
+		for (k=0;k<count/2;k++) {
+			w2(7); w2(6); w2(2);
+			a = r1(); w0(0x58); b = r1();
+			w2(0); d = r1(); w0(0x48); c = r1();
+			buf[2*k] = j44(c,d);
+			buf[2*k+1] = j44(a,b);
+		}
+		w2(0xc);
+		break;
+
+	case 1: w0(0x58); w2(0xe); w2(6);
+		for (k=0;k<count/2;k++) {
+			w2(0x27); w2(0x26); w2(0x22);
+			a = r0(); w2(0x20); b = r0();
+			buf[2*k] = b; buf[2*k+1] = a;
+		}
+		w2(0x26); w2(0xc);
+		break;
+	}
+}
+
+static void aten_write_block( PIA *pi, char * buf, int count )
+
+{	int k;
+
+	w0(0x88); w2(0xe); w2(6);
+	for (k=0;k<count/2;k++) {
+		w0(buf[2*k+1]); w2(0xe); w2(6);
+		w0(buf[2*k]); w2(7); w2(6);
+	}
+	w2(0xc);
+}
+
+static void aten_connect ( PIA *pi  )
+
+{       pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+	w2(0xc);	
+}
+
+static void aten_disconnect ( PIA *pi )
+
+{       w0(pi->saved_r0);
+        w2(pi->saved_r2);
+} 
+
+static void aten_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{       char    *mode_string[2] = {"4-bit","8-bit"};
+
+        printk("%s: aten %s, ATEN EH-100 at 0x%x, ",
+                pi->device,ATEN_VERSION,pi->port);
+        printk("mode %d (%s), delay %d\n",pi->mode,
+		mode_string[pi->mode],pi->delay);
+
+}
+
+static void aten_init_proto( PIA *pi )
+
+{       MOD_INC_USE_COUNT;
+}
+
+static void aten_release_proto( PIA *pi )
+
+{       MOD_DEC_USE_COUNT;
+}
+
+struct pi_protocol aten = {"aten",0,2,2,1,1,
+                           aten_write_regr,
+                           aten_read_regr,
+                           aten_write_block,
+                           aten_read_block,
+                           aten_connect,
+                           aten_disconnect,
+                           0,
+                           0,
+                           0,
+                           aten_log_adapter,
+                           aten_init_proto,
+                           aten_release_proto
+                          };
+
+
+#ifdef MODULE
+
+int     init_module(void)
+
+{       return pi_register( &aten ) - 1;
+}
+
+void    cleanup_module(void)
+
+{       pi_unregister( &aten );
+}
+
+#endif
+
+/* end of aten.c */