From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/block/paride/ktti.c | 128 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 drivers/block/paride/ktti.c

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

diff --git a/drivers/block/paride/ktti.c b/drivers/block/paride/ktti.c
new file mode 100644
index 000000000..117ab0e8c
--- /dev/null
+++ b/drivers/block/paride/ktti.c
@@ -0,0 +1,128 @@
+/* 
+        ktti.c        (c) 1998  Grant R. Guenther <grant@torque.net>
+                          Under the terms of the GNU General Public License.
+
+	ktti.c is a low-level protocol driver for the KT Technology
+	parallel port adapter.  This adapter is used in the "PHd" 
+        portable hard-drives.  As far as I can tell, this device
+	supports 4-bit mode _only_.  
+
+*/
+
+#define KTTI_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>>4)&0x0f)|(b&0xf0))
+
+/* cont = 0 - access the IDE register file 
+   cont = 1 - access the IDE command set 
+*/
+
+static int  cont_map[2] = { 0x10, 0x08 };
+
+static void  ktti_write_regr( PIA *pi, int cont, int regr, int val)
+
+{	int r;
+
+	r = regr + cont_map[cont];
+
+	w0(r); w2(0xb); w2(0xa); w2(3); w2(6); 
+	w0(val); w2(3); w0(0); w2(6); w2(0xb);
+}
+
+static int ktti_read_regr( PIA *pi, int cont, int regr )
+
+{	int  a, b, r;
+
+        r = regr + cont_map[cont];
+
+        w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9); 
+	a = r1(); w2(0xc);  b = r1(); w2(9); w2(0xc); w2(9);
+	return j44(a,b);
+
+}
+
+static void ktti_read_block( PIA *pi, char * buf, int count )
+
+{	int  k, a, b;
+
+	for (k=0;k<count/2;k++) {
+		w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
+		a = r1(); w2(0xc); b = r1(); w2(9);
+		buf[2*k] = j44(a,b);
+		a = r1(); w2(0xc); b = r1(); w2(9);
+		buf[2*k+1] = j44(a,b);
+	}
+}
+
+static void ktti_write_block( PIA *pi, char * buf, int count )
+
+{	int k;
+
+	for (k=0;k<count/2;k++) {
+		w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6);
+		w0(buf[2*k]); w2(3);
+		w0(buf[2*k+1]); w2(6);
+		w2(0xb);
+	}
+}
+
+static void ktti_connect ( PIA *pi  )
+
+{       pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+	w2(0xb); w2(0xa); w0(0); w2(3); w2(6);	
+}
+
+static void ktti_disconnect ( PIA *pi )
+
+{       w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4);
+	w0(pi->saved_r0);
+        w2(pi->saved_r2);
+} 
+
+static void ktti_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{       printk("%s: ktti %s, KT adapter at 0x%x, delay %d\n",
+                pi->device,KTTI_VERSION,pi->port,pi->delay);
+
+}
+
+static struct pi_protocol ktti = {
+	.owner		= THIS_MODULE,
+	.name		= "ktti",
+	.max_mode	= 1,
+	.epp_first	= 2,
+	.default_delay	= 1,
+	.max_units	= 1,
+	.write_regr	= ktti_write_regr,
+	.read_regr	= ktti_read_regr,
+	.write_block	= ktti_write_block,
+	.read_block	= ktti_read_block,
+	.connect	= ktti_connect,
+	.disconnect	= ktti_disconnect,
+	.log_adapter	= ktti_log_adapter,
+};
+
+static int __init ktti_init(void)
+{
+	return paride_register(&ktti);
+}
+
+static void __exit ktti_exit(void)
+{
+	paride_unregister(&ktti);
+}
+
+MODULE_LICENSE("GPL");
+module_init(ktti_init)
+module_exit(ktti_exit)
-- 
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