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Diffstat (limited to 'drivers/block/paride/ktti.c')
-rw-r--r--drivers/block/paride/ktti.c128
1 files changed, 128 insertions, 0 deletions
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)