ata: pata_parport: Fix on20 module code indentation and style

Fix the header, indentation and coding style in the on20 pata parport
protocol module to suppress warnings from smatch and other static code
analyzers.

No functional changes.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

drivers/ata/pata_parport/on20.c

-/* 
-	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. 
-*/
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * (c) 1996-1998  Grant R. Guenther <grant@torque.net>
+ *
+ * on20.c is a low-level protocol driver for the
+ * Onspec 90c20 parallel to IDE adapter.
+ */
 
 #include <linux/module.h>
 #include <linux/init.h>
@@ -15,99 +15,114 @@
 #include <asm/io.h>
 #include "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(struct pi_adapter *pi, int cont, int regr)
-
-{	int h,l, r ;
+#define op(f)					\
+	do {					\
+		w2(4); w0(f); w2(5); w2(0xd);	\
+		w2(5); w2(0xd); w2(5); w2(4);	\
+	} while (0)
 
-        r = (regr<<2) + 1 + cont;
+#define vl(v)					\
+	do {					\
+		w2(4); w0(v); w2(5);		\
+		w2(7); w2(5); w2(4);		\
+	} while (0)
 
-        op(1); vl(r); op(0);
+#define j44(a, b)	(((a >> 4) & 0x0f) | (b & 0xf0))
 
-	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;
+/*
+ * cont = 0 - access the IDE register file
+ * cont = 1 - access the IDE command set
+ */
 
+static int on20_read_regr(struct pi_adapter *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(struct pi_adapter *pi, int cont, int regr, int val)
+{
+	int r = (regr << 2) + 1 + cont;
 
-{	int r;
-
-	r = (regr<<2) + 1 + cont;
-
-	op(1); vl(r); 
-	op(0); vl(val); 
+	op(1); vl(r);
+	op(0); vl(val);
 	op(0); vl(val);
 }
 
 static void on20_connect(struct pi_adapter *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); }
+{
+	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(struct pi_adapter *pi)
-
-{	w2(4);w0(7);w2(4);w2(0xc);w2(4);
-        w0(pi->saved_r0);
-        w2(pi->saved_r2);
-} 
+{
+	w2(4); w0(7); w2(4); w2(0xc); w2(4);
+	w0(pi->saved_r0);
+	w2(pi->saved_r2);
+}
 
 static void on20_read_block(struct pi_adapter *pi, char *buf, int count)
-
-{	int     k, l, h; 
+{
+	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);
-	    }
+	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(struct pi_adapter *pi, char *buf, int count)
-
-{	int	k;
+{
+	int k;
 
 	op(1); vl(1); op(0);
 
-	for (k=0;k<count;k++) { w2(5); w0(buf[k]); w2(7); }
+	for (k = 0; k < count; k++) {
+		w2(5); w0(buf[k]); w2(7);
+	}
 	w2(4);
 }
 
 static void on20_log_adapter(struct pi_adapter *pi)
+{
+	char *mode_string[2] = { "4-bit", "8-bit" };
 
-{       char    *mode_string[2] = {"4-bit","8-bit"};
-
-	dev_info(&pi->dev, "OnSpec 90c20 at 0x%x, mode %d (%s), delay %d\n",
-		pi->port, pi->mode, mode_string[pi->mode], pi->delay);
+	dev_info(&pi->dev,
+		 "OnSpec 90c20 at 0x%x, mode %d (%s), delay %d\n",
+		 pi->port, pi->mode, mode_string[pi->mode], pi->delay);
 }
 
 static struct pi_protocol on20 = {