patch-2.1.77 linux/drivers/block/paride/on26.c
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- Lines: 262
- Date:
Sun Dec 28 12:05:45 1997
- Orig file:
v2.1.76/linux/drivers/block/paride/on26.c
- Orig date:
Wed Dec 31 16:00:00 1969
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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