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path: root/drivers/block/paride/aten.c
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Diffstat (limited to 'drivers/block/paride/aten.c')
-rw-r--r--drivers/block/paride/aten.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/block/paride/aten.c b/drivers/block/paride/aten.c
new file mode 100644
index 00000000000..c4d696d43dc
--- /dev/null
+++ b/drivers/block/paride/aten.c
@@ -0,0 +1,162 @@
+/*
+ aten.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
+ Under the terms of the GNU General Public License.
+
+ aten.c is a low-level protocol driver for the ATEN EH-100
+ parallel port adapter. The EH-100 supports 4-bit and 8-bit
+ modes only. There is also an EH-132 which supports EPP mode
+ transfers. The EH-132 is not yet supported.
+
+*/
+
+/* Changes:
+
+ 1.01 GRG 1998.05.05 init_proto, release_proto
+
+*/
+
+#define ATEN_VERSION "1.01"
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/wait.h>
+#include <linux/types.h>
+#include <asm/io.h>
+
+#include "paride.h"
+
+#define j44(a,b) ((((a>>4)&0x0f)|(b&0xf0))^0x88)
+
+/* cont = 0 - access the IDE register file
+ cont = 1 - access the IDE command set
+*/
+
+static int cont_map[2] = { 0x08, 0x20 };
+
+static void aten_write_regr( PIA *pi, int cont, int regr, int val)
+
+{ int r;
+
+ r = regr + cont_map[cont] + 0x80;
+
+ w0(r); w2(0xe); w2(6); w0(val); w2(7); w2(6); w2(0xc);
+}
+
+static int aten_read_regr( PIA *pi, int cont, int regr )
+
+{ int a, b, r;
+
+ r = regr + cont_map[cont] + 0x40;
+
+ switch (pi->mode) {
+
+ case 0: w0(r); w2(0xe); w2(6);
+ w2(7); w2(6); w2(0);
+ a = r1(); w0(0x10); b = r1(); w2(0xc);
+ return j44(a,b);
+
+ case 1: r |= 0x10;
+ w0(r); w2(0xe); w2(6); w0(0xff);
+ w2(0x27); w2(0x26); w2(0x20);
+ a = r0();
+ w2(0x26); w2(0xc);
+ return a;
+ }
+ return -1;
+}
+
+static void aten_read_block( PIA *pi, char * buf, int count )
+
+{ int k, a, b, c, d;
+
+ switch (pi->mode) {
+
+ case 0: w0(0x48); w2(0xe); w2(6);
+ for (k=0;k<count/2;k++) {
+ w2(7); w2(6); w2(2);
+ a = r1(); w0(0x58); b = r1();
+ w2(0); d = r1(); w0(0x48); c = r1();
+ buf[2*k] = j44(c,d);
+ buf[2*k+1] = j44(a,b);
+ }
+ w2(0xc);
+ break;
+
+ case 1: w0(0x58); w2(0xe); w2(6);
+ for (k=0;k<count/2;k++) {
+ w2(0x27); w2(0x26); w2(0x22);
+ a = r0(); w2(0x20); b = r0();
+ buf[2*k] = b; buf[2*k+1] = a;
+ }
+ w2(0x26); w2(0xc);
+ break;
+ }
+}
+
+static void aten_write_block( PIA *pi, char * buf, int count )
+
+{ int k;
+
+ w0(0x88); w2(0xe); w2(6);
+ for (k=0;k<count/2;k++) {
+ w0(buf[2*k+1]); w2(0xe); w2(6);
+ w0(buf[2*k]); w2(7); w2(6);
+ }
+ w2(0xc);
+}
+
+static void aten_connect ( PIA *pi )
+
+{ pi->saved_r0 = r0();
+ pi->saved_r2 = r2();
+ w2(0xc);
+}
+
+static void aten_disconnect ( PIA *pi )
+
+{ w0(pi->saved_r0);
+ w2(pi->saved_r2);
+}
+
+static void aten_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{ char *mode_string[2] = {"4-bit","8-bit"};
+
+ printk("%s: aten %s, ATEN EH-100 at 0x%x, ",
+ pi->device,ATEN_VERSION,pi->port);
+ printk("mode %d (%s), delay %d\n",pi->mode,
+ mode_string[pi->mode],pi->delay);
+
+}
+
+static struct pi_protocol aten = {
+ .owner = THIS_MODULE,
+ .name = "aten",
+ .max_mode = 2,
+ .epp_first = 2,
+ .default_delay = 1,
+ .max_units = 1,
+ .write_regr = aten_write_regr,
+ .read_regr = aten_read_regr,
+ .write_block = aten_write_block,
+ .read_block = aten_read_block,
+ .connect = aten_connect,
+ .disconnect = aten_disconnect,
+ .log_adapter = aten_log_adapter,
+};
+
+static int __init aten_init(void)
+{
+ return pi_register(&aten)-1;
+}
+
+static void __exit aten_exit(void)
+{
+ pi_unregister( &aten );
+}
+
+MODULE_LICENSE("GPL");
+module_init(aten_init)
+module_exit(aten_exit)