patch-2.1.77 linux/drivers/block/paride/on26.c

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diff -u --recursive --new-file v2.1.76/linux/drivers/block/paride/on26.c linux/drivers/block/paride/on26.c
@@ -0,0 +1,261 @@
+/* 
+        on26.c    (c) 1997  Grant R. Guenther <grant@torque.net>
+                            Under the terms of the GNU public license.
+
+        on26.c is a low-level protocol driver for the 
+        OnSpec 90c26 parallel to IDE adapter chip.
+
+*/
+
+#define ON26_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"
+
+/* mode codes:  0  nybble reads, 8-bit writes
+                1  8-bit reads and writes
+                2  8-bit EPP mode
+		3  EPP-16
+		4  EPP-32
+*/
+
+#define j44(a,b)  (((a>>4)&0x0f)|(b&0xf0))
+
+#define P1	w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
+#define P2	w2(5);w2(7);w2(5);w2(4);
+
+/* cont = 0 - access the IDE register file 
+   cont = 1 - access the IDE command set 
+*/
+
+static int on26_read_regr( PIA *pi, int cont, int regr )
+
+{       int     a, b, r;
+
+	r = (regr<<2) + 1 + cont;
+
+        switch (pi->mode)  {
+
+        case 0: w0(1); P1; w0(r); P2; w0(0); P1; 
+		w2(6); a = r1(); w2(4);
+		w2(6); b = r1(); w2(4);
+		w2(6); w2(4); w2(6); w2(4);
+                return j44(a,b);
+
+        case 1: w0(1); P1; w0(r); P2; w0(0); P1;
+		w2(0x26); a = r0(); w2(4); w2(0x26); w2(4);
+                return a;
+
+	case 2:
+	case 3:
+        case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
+		w3(0); w3(0); w2(0x24); a = r4(); w2(4);
+		w2(0x24); r4(); w2(4);
+                return a;
+
+        }
+        return -1;
+}       
+
+static void on26_write_regr( PIA *pi, int cont, int regr, int val )
+
+{       int  r;
+
+        r = (regr<<2) + 1 + cont;
+
+        switch (pi->mode)  {
+
+        case 0:
+        case 1: w0(1); P1; w0(r); P2; w0(0); P1;
+		w0(val); P2; w0(val); P2;
+		break;
+
+	case 2:
+	case 3:
+        case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
+		w3(0); w3(0); 
+		w2(5); w4(val); w2(4);
+		w2(5); w4(val); w2(4);
+                break;
+        }
+}
+
+#define  CCP(x)  w0(0xff);w0(0xaa);w0(0x55);w0(0);w0(0xff);\
+		 w0(0x87);w0(0x78);w0(x);w2(4);
+
+static void on26_connect ( PIA *pi )
+
+{       int	x;
+
+	pi->saved_r0 = r0();
+        pi->saved_r2 = r2();
+
+        CCP(0x20);
+	w2(0xcd); w2(0xcc); w0(0xff);
+	x = 8; if (pi->mode) x = 9;
+
+	w0(2); P1; w0(8); P2;
+	w0(2); P1; w0(x); P2;
+}
+
+static void on26_disconnect ( PIA *pi )
+
+{       if (pi->mode >= 2) { w3(4); w3(4); w3(4); w3(4); }
+	              else { w0(4); P1; w0(4); P1; }
+	CCP(0x30);
+        w2(0xcd); w2(0xcc); w0(0xff);
+        w0(pi->saved_r0);
+        w2(pi->saved_r2);
+} 
+
+static void on26_read_block( PIA *pi, char * buf, int count )
+
+{       int     k, a, b;
+
+        switch (pi->mode) {
+
+        case 0: w0(1); P1; w0(1); P2; w0(2); P1; w0(0x18); P2; w0(0); P1;
+		udelay(10);
+		for (k=0;k<count;k++) {
+                        w2(6); a = r1();
+                        w2(4); b = r1();
+                        buf[k] = j44(a,b);
+                }
+		w0(2); P1; w0(8); P2; 
+                break;
+
+        case 1: w0(1); P1; w0(1); P2; w0(2); P1; w0(0x19); P2; w0(0); P1;
+		udelay(10);
+                for (k=0;k<count/2;k++) {
+                        w2(0x26); buf[2*k] = r0(); 
+			w2(0x24); buf[2*k+1] = r0();
+                }
+                w0(2); P1; w0(9); P2;
+                break;
+
+        case 2: w3(1); w3(1); w2(5); w4(1); w2(4);
+		w3(0); w3(0); w2(0x24);
+		udelay(10);
+                for (k=0;k<count;k++) buf[k] = r4();
+                w2(4);
+                break;
+
+        case 3: w3(1); w3(1); w2(5); w4(1); w2(4);
+                w3(0); w3(0); w2(0x24);
+                udelay(10);
+                for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w();
+                w2(4);
+                break;
+
+        case 4: w3(1); w3(1); w2(5); w4(1); w2(4);
+                w3(0); w3(0); w2(0x24);
+                udelay(10);
+                for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l();
+                w2(4);
+                break;
+
+        }
+}
+
+static void on26_write_block( PIA *pi, char * buf, int count )
+
+{       int	k;
+
+        switch (pi->mode) {
+
+        case 0: 
+        case 1: w0(1); P1; w0(1); P2; 
+		w0(2); P1; w0(0x18+pi->mode); P2; w0(0); P1;
+		udelay(10);
+		for (k=0;k<count/2;k++) {
+                        w2(5); w0(buf[2*k]); 
+			w2(7); w0(buf[2*k+1]);
+                }
+                w2(5); w2(4);
+		w0(2); P1; w0(8+pi->mode); P2;
+                break;
+
+        case 2: w3(1); w3(1); w2(5); w4(1); w2(4);
+		w3(0); w3(0); w2(0xc5);
+		udelay(10);
+                for (k=0;k<count;k++) w4(buf[k]);
+		w2(0xc4);
+                break;
+
+        case 3: w3(1); w3(1); w2(5); w4(1); w2(4);
+                w3(0); w3(0); w2(0xc5);
+                udelay(10);
+                for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]);
+                w2(0xc4);
+                break;
+
+        case 4: w3(1); w3(1); w2(5); w4(1); w2(4);
+                w3(0); w3(0); w2(0xc5);
+                udelay(10);
+                for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]);
+                w2(0xc4);
+                break;
+
+        }
+
+}
+
+static void on26_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{       char    *mode_string[5] = {"4-bit","8-bit","EPP-8",
+				   "EPP-16","EPP-32"};
+
+        printk("%s: on26 %s, OnSpec 90c26 at 0x%x, ",
+                pi->device,ON26_VERSION,pi->port);
+        printk("mode %d (%s), delay %d\n",pi->mode,
+		mode_string[pi->mode],pi->delay);
+
+}
+
+static void on26_inc_use ( void )
+
+{       MOD_INC_USE_COUNT;
+}
+
+static void on26_dec_use ( void )
+
+{       MOD_DEC_USE_COUNT;
+}
+
+struct pi_protocol on26 = {"on26",0,5,2,1,1,
+                           on26_write_regr,
+                           on26_read_regr,
+                           on26_write_block,
+                           on26_read_block,
+                           on26_connect,
+                           on26_disconnect,
+                           0,
+                           0,
+                           0,
+                           on26_log_adapter,
+                           on26_inc_use, 
+                           on26_dec_use 
+                          };
+
+
+#ifdef MODULE
+
+int     init_module(void)
+
+{       return pi_register( &on26 ) - 1;
+}
+
+void    cleanup_module(void)
+
+{       pi_unregister( &on26 );
+}
+
+#endif
+
+/* end of on26.c */
+

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