patch-2.0.35 linux/drivers/block/paride/fit2.c

• Lines: 162
• Date: Mon Jul 13 13:47:28 1998
• Orig file: v2.0.34/linux/drivers/block/paride/fit2.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.0.34/linux/drivers/block/paride/fit2.c linux/drivers/block/paride/fit2.c
@@ -0,0 +1,161 @@
+/* 
+        fit2.c        (c) 1998  Grant R. Guenther <grant@torque.net>
+                          Under the terms of the GNU public license.
+
+	fit2.c is a low-level protocol driver for the older version
+        of the Fidelity International Technology parallel port adapter.  
+	This adapter is used in their TransDisk 2000 and older TransDisk
+	3000 portable hard-drives.  As far as I can tell, this device
+	supports 4-bit mode _only_.  
+
+	Newer models of the FIT products use an enhanced protocol.
+	The "fit3" protocol module should support current drives.
+
+*/
+
+#define FIT2_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 j44(a,b)                (((a>>4)&0x0f)|(b&0xf0))
+
+/* cont = 0 - access the IDE register file 
+   cont = 1 - access the IDE command set 
+
+NB:  The FIT adapter does not appear to use the control registers.
+So, we map ALT_STATUS to STATUS and NO-OP writes to the device
+control register - this means that IDE reset will not work on these
+devices.
+
+*/
+
+static void  fit2_write_regr( PIA *pi, int cont, int regr, int val)
+
+{	if (cont == 1) return;
+	w2(0xc); w0(regr); w2(4); w0(val); w2(5); w0(0); w2(4);
+}
+
+static int fit2_read_regr( PIA *pi, int cont, int regr )
+
+{	int  a, b, r;
+
+	if (cont) {
+	  if (regr != 6) return 0xff;
+	  r = 7;
+	} else r = regr + 0x10;
+
+	w2(0xc); w0(r); w2(4); w2(5); 
+	         w0(0); a = r1();
+	         w0(1); b = r1();
+	w2(4);
+
+	return j44(a,b);
+
+}
+
+static void fit2_read_block( PIA *pi, char * buf, int count )
+
+{	int  k, a, b, c, d;
+
+	w2(0xc); w0(0x10);
+
+	for (k=0;k<count/4;k++) {
+
+		w2(4); w2(5);
+		w0(0); a = r1(); w0(1); b = r1();
+		w0(3); c = r1(); w0(2); d = r1(); 
+		buf[4*k+0] = j44(a,b);
+		buf[4*k+1] = j44(d,c);
+
+                w2(4); w2(5);
+                       a = r1(); w0(3); b = r1();
+                w0(1); c = r1(); w0(0); d = r1(); 
+                buf[4*k+2] = j44(d,c);
+                buf[4*k+3] = j44(a,b);
+
+	}
+
+	w2(4);
+
+}
+
+static void fit2_write_block( PIA *pi, char * buf, int count )
+
+{	int k;
+
+
+	w2(0xc); w0(0); 
+	for (k=0;k<count/2;k++) {
+		w2(4); w0(buf[2*k]); 
+		w2(5); w0(buf[2*k+1]);
+	}
+	w2(4);
+}
+
+static void fit2_connect ( PIA *pi  )
+
+{       pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+	w2(0xcc); 
+}
+
+static void fit2_disconnect ( PIA *pi )
+
+{       w0(pi->saved_r0);
+        w2(pi->saved_r2);
+} 
+
+static void fit2_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{       printk("%s: fit2 %s, FIT 2000 adapter at 0x%x, delay %d\n",
+                pi->device,FIT2_VERSION,pi->port,pi->delay);
+
+}
+
+static void fit2_init_proto( PIA *pi)
+
+{       MOD_INC_USE_COUNT;
+}
+
+static void fit2_release_proto( PIA *pi)
+
+{       MOD_DEC_USE_COUNT;
+}
+
+struct pi_protocol fit2 = {"fit2",0,1,2,1,1,
+                           fit2_write_regr,
+                           fit2_read_regr,
+                           fit2_write_block,
+                           fit2_read_block,
+                           fit2_connect,
+                           fit2_disconnect,
+                           0,
+                           0,
+                           0,
+                           fit2_log_adapter,
+                           fit2_init_proto,
+                           fit2_release_proto
+                          };
+
+
+#ifdef MODULE
+
+int     init_module(void)
+
+{       return pi_register( &fit2 ) - 1;
+}
+
+void    cleanup_module(void)
+
+{       pi_unregister( &fit2 );
+}
+
+#endif
+
+/* end of fit2.c */