From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/block/paride/fit3.c | 211 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 211 insertions(+)
 create mode 100644 drivers/block/paride/fit3.c

(limited to 'drivers/block/paride/fit3.c')

diff --git a/drivers/block/paride/fit3.c b/drivers/block/paride/fit3.c
new file mode 100644
index 000000000..275d26945
--- /dev/null
+++ b/drivers/block/paride/fit3.c
@@ -0,0 +1,211 @@
+/* 
+        fit3.c        (c) 1998  Grant R. Guenther <grant@torque.net>
+                          Under the terms of the GNU General Public License.
+
+	fit3.c is a low-level protocol driver for newer models 
+        of the Fidelity International Technology parallel port adapter.  
+	This adapter is used in their TransDisk 3000 portable 
+	hard-drives, as well as CD-ROM, PD-CD and other devices.
+
+	The TD-2000 and certain older devices use a different protocol.
+	Try the fit2 protocol module with them.
+
+        NB:  The FIT adapters do not appear to support 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.
+
+*/
+
+#define FIT3_VERSION      "1.0"
+
+#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 "paride.h"
+
+#define j44(a,b)                (((a>>3)&0x0f)|((b<<1)&0xf0))
+
+#define w7(byte)                {out_p(7,byte);}
+#define r7()                    (in_p(7) & 0xff)
+
+/* cont = 0 - access the IDE register file 
+   cont = 1 - access the IDE command set 
+
+*/
+
+static void  fit3_write_regr( PIA *pi, int cont, int regr, int val)
+
+{	if (cont == 1) return;
+
+	switch (pi->mode) {
+
+	case 0:
+	case 1: w2(0xc); w0(regr); w2(0x8); w2(0xc); 
+		w0(val); w2(0xd); 
+		w0(0);   w2(0xc);
+		break;
+
+	case 2: w2(0xc); w0(regr); w2(0x8); w2(0xc);
+		w4(val); w4(0);
+		w2(0xc);
+		break;
+
+	}
+}
+
+static int fit3_read_regr( PIA *pi, int cont, int regr )
+
+{	int  a, b;
+
+	if (cont) {
+	  if (regr != 6) return 0xff;
+	  regr = 7;
+	} 
+
+	switch (pi->mode) {
+
+	case 0: w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc);
+		w2(0xd); a = r1();
+		w2(0xf); b = r1(); 
+		w2(0xc);
+		return j44(a,b);
+
+	case 1: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
+		w2(0xec); w2(0xee); w2(0xef); a = r0(); 
+		w2(0xc);
+		return a;
+
+	case 2: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc); 
+		w2(0xec); 
+		a = r4(); b = r4(); 
+		w2(0xc);
+		return a;
+
+	}
+	return -1; 
+
+}
+
+static void fit3_read_block( PIA *pi, char * buf, int count )
+
+{	int  k, a, b, c, d;
+
+	switch (pi->mode) {
+
+	case 0: w2(0xc); w0(0x10); w2(0x8); w2(0xc);
+		for (k=0;k<count/2;k++) {
+		    w2(0xd); a = r1();
+		    w2(0xf); b = r1();
+		    w2(0xc); c = r1();
+		    w2(0xe); d = r1();
+		    buf[2*k  ] = j44(a,b);
+		    buf[2*k+1] = j44(c,d);
+		}
+		w2(0xc);
+		break;
+
+	case 1: w2(0xc); w0(0x90); w2(0x8); w2(0xc); 
+		w2(0xec); w2(0xee);
+		for (k=0;k<count/2;k++) {
+		    w2(0xef); a = r0();
+		    w2(0xee); b = r0();
+                    buf[2*k  ] = a;
+                    buf[2*k+1] = b;
+		}
+		w2(0xec); 
+		w2(0xc);
+		break;
+
+	case 2: w2(0xc); w0(0x90); w2(0x8); w2(0xc); 
+                w2(0xec);
+		for (k=0;k<count;k++) buf[k] = r4();
+                w2(0xc);
+		break;
+
+	}
+}
+
+static void fit3_write_block( PIA *pi, char * buf, int count )
+
+{	int k;
+
+        switch (pi->mode) {
+
+	case 0:
+        case 1: w2(0xc); w0(0); w2(0x8); w2(0xc);
+                for (k=0;k<count/2;k++) {
+ 		    w0(buf[2*k  ]); w2(0xd);
+ 		    w0(buf[2*k+1]); w2(0xc);
+		}
+		break;
+
+        case 2: w2(0xc); w0(0); w2(0x8); w2(0xc); 
+                for (k=0;k<count;k++) w4(buf[k]);
+                w2(0xc);
+		break;
+	}
+}
+
+static void fit3_connect ( PIA *pi  )
+
+{       pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+	w2(0xc); w0(0); w2(0xa);
+	if (pi->mode == 2) { 
+		w2(0xc); w0(0x9); w2(0x8); w2(0xc); 
+		}
+}
+
+static void fit3_disconnect ( PIA *pi )
+
+{       w2(0xc); w0(0xa); w2(0x8); w2(0xc);
+	w0(pi->saved_r0);
+        w2(pi->saved_r2);
+} 
+
+static void fit3_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{       char    *mode_string[3] = {"4-bit","8-bit","EPP"};
+
+	printk("%s: fit3 %s, FIT 3000 adapter at 0x%x, "
+	       "mode %d (%s), delay %d\n",
+                pi->device,FIT3_VERSION,pi->port,
+		pi->mode,mode_string[pi->mode],pi->delay);
+
+}
+
+static struct pi_protocol fit3 = {
+	.owner		= THIS_MODULE,
+	.name		= "fit3",
+	.max_mode	= 3,
+	.epp_first	= 2,
+	.default_delay	= 1,
+	.max_units	= 1,
+	.write_regr	= fit3_write_regr,
+	.read_regr	= fit3_read_regr,
+	.write_block	= fit3_write_block,
+	.read_block	= fit3_read_block,
+	.connect	= fit3_connect,
+	.disconnect	= fit3_disconnect,
+	.log_adapter	= fit3_log_adapter,
+};
+
+static int __init fit3_init(void)
+{
+	return paride_register(&fit3);
+}
+
+static void __exit fit3_exit(void)
+{
+	paride_unregister(&fit3);
+}
+
+MODULE_LICENSE("GPL");
+module_init(fit3_init)
+module_exit(fit3_exit)
-- 
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