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Diffstat (limited to 'drivers/ata/pata_parport/comm.c')
-rw-r--r--drivers/ata/pata_parport/comm.c238
1 files changed, 122 insertions, 116 deletions
diff --git a/drivers/ata/pata_parport/comm.c b/drivers/ata/pata_parport/comm.c
index 4c2f9ad60ad8..cc5485bd0a5b 100644
--- a/drivers/ata/pata_parport/comm.c
+++ b/drivers/ata/pata_parport/comm.c
@@ -1,12 +1,11 @@
-/*
- comm.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
- Under the terms of the GNU General Public License.
-
- comm.c is a low-level protocol driver for some older models
- of the DataStor "Commuter" parallel to IDE adapter. Some of
- the parallel port devices marketed by Arista currently
- use this adapter.
-*/
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * (c) 1997-1998 Grant R. Guenther <grant@torque.net>
+ *
+ * comm.c is a low-level protocol driver for some older models of the DataStor
+ * "Commuter" parallel to IDE adapter. Some of the parallel port devices
+ * marketed by Arista currently use this adapter.
+ */
#include <linux/module.h>
#include <linux/init.h>
@@ -17,165 +16,172 @@
#include <asm/io.h>
#include "pata_parport.h"
-/* mode codes: 0 nybble reads, 8-bit writes
- 1 8-bit reads and writes
- 2 8-bit EPP mode
-*/
+/*
+ * mode codes: 0 nybble reads, 8-bit writes
+ * 1 8-bit reads and writes
+ * 2 8-bit EPP mode
+ */
-#define j44(a,b) (((a>>3)&0x0f)|((b<<1)&0xf0))
+#define j44(a, b) (((a >> 3) & 0x0f) | ((b << 1) & 0xf0))
#define P1 w2(5);w2(0xd);w2(0xd);w2(5);w2(4);
#define P2 w2(5);w2(7);w2(7);w2(5);w2(4);
-/* cont = 0 - access the IDE register file
- cont = 1 - access the IDE command set
-*/
-
+/*
+ * cont = 0 - access the IDE register file
+ * cont = 1 - access the IDE command set
+ */
static int cont_map[2] = { 0x08, 0x10 };
static int comm_read_regr(struct pi_adapter *pi, int cont, int regr)
-
-{ int l, h, r;
+{
+ int l, h, r;
r = regr + cont_map[cont];
- switch (pi->mode) {
+ switch (pi->mode) {
+ case 0:
+ w0(r); P1; w0(0);
+ w2(6); l = r1(); w0(0x80); h = r1(); w2(4);
+ return j44(l, h);
- case 0: w0(r); P1; w0(0);
- w2(6); l = r1(); w0(0x80); h = r1(); w2(4);
- return j44(l,h);
-
- case 1: w0(r+0x20); P1;
- w0(0); w2(0x26); h = r0(); w2(4);
- return h;
+ case 1:
+ w0(r+0x20); P1;
+ w0(0); w2(0x26); h = r0(); w2(4);
+ return h;
case 2:
case 3:
- case 4: w3(r+0x20); (void)r1();
- w2(0x24); h = r4(); w2(4);
- return h;
+ case 4:
+ w3(r+0x20); (void)r1();
+ w2(0x24); h = r4(); w2(4);
+ return h;
+ }
- }
- return -1;
-}
+ return -1;
+}
static void comm_write_regr(struct pi_adapter *pi, int cont, int regr, int val)
+{
+ int r = regr + cont_map[cont];
-{ int r;
-
- r = regr + cont_map[cont];
-
- switch (pi->mode) {
-
- case 0:
- case 1: w0(r); P1; w0(val); P2;
+ switch (pi->mode) {
+ case 0:
+ case 1:
+ w0(r); P1; w0(val); P2;
break;
-
case 2:
case 3:
- case 4: w3(r); (void)r1(); w4(val);
- break;
- }
+ case 4:
+ w3(r); (void)r1(); w4(val);
+ break;
+ }
}
static void comm_connect(struct pi_adapter *pi)
-
-{ pi->saved_r0 = r0();
- pi->saved_r2 = r2();
- w2(4); w0(0xff); w2(6);
- w2(4); w0(0xaa); w2(6);
- w2(4); w0(0x00); w2(6);
- w2(4); w0(0x87); w2(6);
- w2(4); w0(0xe0); w2(0xc); w2(0xc); w2(4);
+{
+ pi->saved_r0 = r0();
+ pi->saved_r2 = r2();
+ w2(4); w0(0xff); w2(6);
+ w2(4); w0(0xaa); w2(6);
+ w2(4); w0(0x00); w2(6);
+ w2(4); w0(0x87); w2(6);
+ w2(4); w0(0xe0); w2(0xc); w2(0xc); w2(4);
}
static void comm_disconnect(struct pi_adapter *pi)
-{ w2(0); w2(0); w2(0); w2(4);
+{
+ w2(0); w2(0); w2(0); w2(4);
w0(pi->saved_r0);
- w2(pi->saved_r2);
-}
+ w2(pi->saved_r2);
+}
static void comm_read_block(struct pi_adapter *pi, char *buf, int count)
-
-{ int i, l, h;
-
- switch (pi->mode) {
-
- case 0: w0(0x48); P1;
- for(i=0;i<count;i++) {
- w0(0); w2(6); l = r1();
- w0(0x80); h = r1(); w2(4);
- buf[i] = j44(l,h);
- }
- break;
-
- case 1: w0(0x68); P1; w0(0);
- for(i=0;i<count;i++) {
- w2(0x26); buf[i] = r0(); w2(0x24);
- }
+{
+ int i, l, h;
+
+ switch (pi->mode) {
+ case 0:
+ w0(0x48); P1;
+ for (i = 0; i < count; i++) {
+ w0(0); w2(6); l = r1();
+ w0(0x80); h = r1(); w2(4);
+ buf[i] = j44(l, h);
+ }
+ break;
+ case 1:
+ w0(0x68); P1; w0(0);
+ for (i = 0; i < count; i++) {
+ w2(0x26);
+ buf[i] = r0();
+ w2(0x24);
+ }
w2(4);
break;
-
- case 2: w3(0x68); (void)r1(); w2(0x24);
- for (i=0;i<count;i++) buf[i] = r4();
+ case 2:
+ w3(0x68); (void)r1(); w2(0x24);
+ for (i = 0; i < count; i++)
+ buf[i] = r4();
+ w2(4);
+ break;
+ case 3:
+ w3(0x68); (void)r1(); w2(0x24);
+ for (i = 0; i < count / 2; i++)
+ ((u16 *)buf)[i] = r4w();
+ w2(4);
+ break;
+ case 4:
+ w3(0x68); (void)r1(); w2(0x24);
+ for (i = 0; i < count / 4; i++)
+ ((u32 *)buf)[i] = r4l();
w2(4);
break;
-
- case 3: w3(0x68); (void)r1(); w2(0x24);
- for (i=0;i<count/2;i++) ((u16 *)buf)[i] = r4w();
- w2(4);
- break;
-
- case 4: w3(0x68); (void)r1(); w2(0x24);
- for (i=0;i<count/4;i++) ((u32 *)buf)[i] = r4l();
- w2(4);
- break;
-
}
}
/* NB: Watch out for the byte swapped writes ! */
-
static void comm_write_block(struct pi_adapter *pi, char *buf, int count)
-
-{ int k;
-
- switch (pi->mode) {
-
- case 0:
- case 1: w0(0x68); P1;
- for (k=0;k<count;k++) {
- w2(5); w0(buf[k^1]); w2(7);
- }
- w2(5); w2(4);
- break;
-
- case 2: w3(0x48); (void)r1();
- for (k=0;k<count;k++) w4(buf[k^1]);
- break;
-
- case 3: w3(0x48); (void)r1();
+{
+ int k;
+
+ switch (pi->mode) {
+ case 0:
+ case 1:
+ w0(0x68); P1;
+ for (k = 0; k < count; k++) {
+ w2(5);
+ w0(buf[k ^ 1]);
+ w2(7);
+ }
+ w2(5); w2(4);
+ break;
+ case 2:
+ w3(0x48); (void)r1();
+ for (k = 0; k < count; k++)
+ w4(buf[k ^ 1]);
+ break;
+ case 3:
+ w3(0x48); (void)r1();
for (k = 0; k < count / 2; k++)
w4w(swab16(((u16 *)buf)[k]));
- break;
-
- case 4: w3(0x48); (void)r1();
+ break;
+ case 4:
+ w3(0x48); (void)r1();
for (k = 0; k < count / 4; k++)
w4l(swab16(((u16 *)buf)[2 * k]) |
swab16(((u16 *)buf)[2 * k + 1]) << 16);
- break;
-
-
+ break;
}
}
static void comm_log_adapter(struct pi_adapter *pi)
-{ char *mode_string[5] = {"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
+{ char *mode_string[5] = { "4-bit", "8-bit", "EPP-8", "EPP-16", "EPP-32" };
- dev_info(&pi->dev, "DataStor Commuter at 0x%x, mode %d (%s), delay %d\n",
- pi->port, pi->mode, mode_string[pi->mode], pi->delay);
+ dev_info(&pi->dev,
+ "DataStor Commuter at 0x%x, mode %d (%s), delay %d\n",
+ pi->port, pi->mode, mode_string[pi->mode], pi->delay);
}
static struct pi_protocol comm = {
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