-/*
- friq.c (c) 1998 Grant R. Guenther <grant@torque.net>
- Under the terms of the GNU General Public License
-
- friq.c is a low-level protocol driver for the Freecom "IQ"
- parallel port IDE adapter. Early versions of this adapter
- use the 'frpw' protocol.
-
- Freecom uses this adapter in a battery powered external
- CD-ROM drive. It is also used in LS-120 drives by
- Maxell and Panasonic, and other devices.
-
- The battery powered drive requires software support to
- control the power to the drive. This module enables the
- drive power when the high level driver (pcd) is loaded
- and disables it when the module is unloaded. Note, if
- the friq module is built in to the kernel, the power
- will never be switched off, so other means should be
- used to conserve battery power.
-
-*/
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * (c) 1998 Grant R. Guenther <grant@torque.net>
+ *
+ * friq.c is a low-level protocol driver for the Freecom "IQ"
+ * parallel port IDE adapter. Early versions of this adapter
+ * use the 'frpw' protocol.
+ *
+ * Freecom uses this adapter in a battery powered external
+ * CD-ROM drive. It is also used in LS-120 drives by
+ * Maxell and Panasonic, and other devices.
+ *
+ * The battery powered drive requires software support to
+ * control the power to the drive. This module enables the
+ * drive power when the high level driver (pcd) is loaded
+ * and disables it when the module is unloaded. Note, if
+ * the friq module is built in to the kernel, the power
+ * will never be switched off, so other means should be
+ * used to conserve battery power.
+ */
#include <linux/module.h>
#include <linux/init.h>
#include <asm/io.h>
#include "pata_parport.h"
-#define CMD(x) w2(4);w0(0xff);w0(0xff);w0(0x73);w0(0x73);\
- w0(0xc9);w0(0xc9);w0(0x26);w0(0x26);w0(x);w0(x);
+#define CMD(x) \
+ do { \
+ w2(4); w0(0xff); w0(0xff); w0(0x73); w0(0x73); \
+ w0(0xc9); w0(0xc9); w0(0x26); \
+ w0(0x26); w0(x); w0(x); \
+ } while (0)
-#define j44(l,h) (((l>>4)&0x0f)|(h&0xf0))
+#define j44(l, h) (((l >> 4) & 0x0f) | (h & 0xf0))
-/* cont = 0 - access the IDE register file
- cont = 1 - access the IDE command set
-*/
-
-static int cont_map[2] = { 0x08, 0x10 };
+/*
+ * cont = 0 - access the IDE register file
+ * cont = 1 - access the IDE command set
+ */
+static int cont_map[2] = { 0x08, 0x10 };
static int friq_read_regr(struct pi_adapter *pi, int cont, int regr)
-
-{ int h,l,r;
+{
+ int h, l, r;
r = regr + cont_map[cont];
CMD(r);
w2(6); l = r1();
w2(4); h = r1();
- w2(4);
-
- return j44(l,h);
+ w2(4);
+ return j44(l, h);
}
static void friq_write_regr(struct pi_adapter *pi, int cont, int regr, int val)
-
-{ int r;
-
- r = regr + cont_map[cont];
+{
+ int r = regr + cont_map[cont];
CMD(r);
w0(val);
- w2(5);w2(7);w2(5);w2(4);
+ w2(5); w2(7); w2(5); w2(4);
}
static void friq_read_block_int(struct pi_adapter *pi, char *buf, int count, int regr)
+{
+ int h, l, k, ph;
-{ int h, l, k, ph;
-
- switch(pi->mode) {
-
- case 0: CMD(regr);
- for (k=0;k<count;k++) {
- w2(6); l = r1();
- w2(4); h = r1();
- buf[k] = j44(l,h);
- }
- w2(4);
- break;
-
- case 1: ph = 2;
- CMD(regr+0xc0);
- w0(0xff);
- for (k=0;k<count;k++) {
- w2(0xa4 + ph);
- buf[k] = r0();
- ph = 2 - ph;
- }
- w2(0xac); w2(0xa4); w2(4);
- break;
-
- case 2: CMD(regr+0x80);
- for (k=0;k<count-2;k++) buf[k] = r4();
+ switch (pi->mode) {
+ case 0:
+ CMD(regr);
+ for (k = 0; k < count; k++) {
+ w2(6); l = r1();
+ w2(4); h = r1();
+ buf[k] = j44(l, h);
+ }
+ w2(4);
+ break;
+ case 1:
+ ph = 2;
+ CMD(regr + 0xc0);
+ w0(0xff);
+ for (k = 0; k < count; k++) {
+ w2(0xa4 + ph);
+ buf[k] = r0();
+ ph = 2 - ph;
+ }
+ w2(0xac); w2(0xa4); w2(4);
+ break;
+ case 2:
+ CMD(regr + 0x80);
+ for (k = 0; k < count - 2; k++)
+ buf[k] = r4();
w2(0xac); w2(0xa4);
- buf[count-2] = r4();
- buf[count-1] = r4();
+ buf[count - 2] = r4();
+ buf[count - 1] = r4();
w2(4);
break;
-
- case 3: CMD(regr+0x80);
- for (k=0;k<(count/2)-1;k++) ((u16 *)buf)[k] = r4w();
- w2(0xac); w2(0xa4);
- buf[count-2] = r4();
- buf[count-1] = r4();
- w2(4);
- break;
-
- case 4: CMD(regr+0x80);
- for (k=0;k<(count/4)-1;k++) ((u32 *)buf)[k] = r4l();
- buf[count-4] = r4();
- buf[count-3] = r4();
- w2(0xac); w2(0xa4);
- buf[count-2] = r4();
- buf[count-1] = r4();
- w2(4);
- break;
-
- }
+ case 3:
+ CMD(regr + 0x80);
+ for (k = 0; k < count / 2 - 1; k++)
+ ((u16 *)buf)[k] = r4w();
+ w2(0xac); w2(0xa4);
+ buf[count - 2] = r4();
+ buf[count - 1] = r4();
+ w2(4);
+ break;
+ case 4:
+ CMD(regr + 0x80);
+ for (k = 0; k < count / 4 - 1; k++)
+ ((u32 *)buf)[k] = r4l();
+ buf[count - 4] = r4();
+ buf[count - 3] = r4();
+ w2(0xac); w2(0xa4);
+ buf[count - 2] = r4();
+ buf[count - 1] = r4();
+ w2(4);
+ break;
+ }
}
static void friq_read_block(struct pi_adapter *pi, char *buf, int count)
-
-{ friq_read_block_int(pi,buf,count,0x08);
+{
+ friq_read_block_int(pi, buf, count, 0x08);
}
static void friq_write_block(struct pi_adapter *pi, char *buf, int count)
-
-{ int k;
-
- switch(pi->mode) {
+{
+ int k;
+ switch (pi->mode) {
case 0:
- case 1: CMD(8); w2(5);
- for (k=0;k<count;k++) {
+ case 1:
+ CMD(8); w2(5);
+ for (k = 0; k < count; k++) {
w0(buf[k]);
- w2(7);w2(5);
+ w2(7); w2(5);
}
w2(4);
break;
-
- case 2: CMD(0xc8); w2(5);
- for (k=0;k<count;k++) w4(buf[k]);
+ case 2:
+ CMD(0xc8); w2(5);
+ for (k = 0; k < count; k++)
+ w4(buf[k]);
+ w2(4);
+ break;
+ case 3:
+ CMD(0xc8); w2(5);
+ for (k = 0; k < count / 2; k++)
+ w4w(((u16 *)buf)[k]);
+ w2(4);
+ break;
+ case 4:
+ CMD(0xc8); w2(5);
+ for (k = 0; k < count / 4; k++)
+ w4l(((u32 *)buf)[k]);
w2(4);
break;
-
- case 3: CMD(0xc8); w2(5);
- for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]);
- w2(4);
- break;
-
- case 4: CMD(0xc8); w2(5);
- for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]);
- w2(4);
- break;
- }
+}
}
static void friq_connect(struct pi_adapter *pi)
-
-{ pi->saved_r0 = r0();
- pi->saved_r2 = r2();
+{
+ pi->saved_r0 = r0();
+ pi->saved_r2 = r2();
w2(4);
}
static void friq_disconnect(struct pi_adapter *pi)
-
-{ CMD(0x20);
+{
+ CMD(0x20);
w0(pi->saved_r0);
- w2(pi->saved_r2);
-}
+ w2(pi->saved_r2);
+}
static int friq_test_proto(struct pi_adapter *pi)
-
-{ int j, k, r;
- int e[2] = {0,0};
+{
+ int j, k, r;
+ int e[2] = { 0, 0 };
char scratch[512];
- pi->saved_r0 = r0();
+ pi->saved_r0 = r0();
w0(0xff); udelay(20); CMD(0x3d); /* turn the power on */
udelay(500);
w0(pi->saved_r0);
friq_connect(pi);
- for (j=0;j<2;j++) {
- friq_write_regr(pi,0,6,0xa0+j*0x10);
- for (k=0;k<256;k++) {
- friq_write_regr(pi,0,2,k^0xaa);
- friq_write_regr(pi,0,3,k^0x55);
- if (friq_read_regr(pi,0,2) != (k^0xaa)) e[j]++;
- }
- }
+ for (j = 0; j < 2; j++) {
+ friq_write_regr(pi, 0, 6, 0xa0 + j * 0x10);
+ for (k = 0; k < 256; k++) {
+ friq_write_regr(pi, 0, 2, k ^ 0xaa);
+ friq_write_regr(pi, 0, 3, k ^ 0x55);
+ if (friq_read_regr(pi, 0, 2) != (k ^ 0xaa))
+ e[j]++;
+ }
+ }
friq_disconnect(pi);
friq_connect(pi);
- friq_read_block_int(pi,scratch,512,0x10);
- r = 0;
- for (k=0;k<128;k++) if (scratch[k] != k) r++;
+ friq_read_block_int(pi, scratch, 512, 0x10);
+ r = 0;
+ for (k = 0; k < 128; k++) {
+ if (scratch[k] != k)
+ r++;
+ }
friq_disconnect(pi);
- dev_dbg(&pi->dev, "friq: port 0x%x, mode %d, test=(%d,%d,%d)\n",
- pi->port, pi->mode, e[0], e[1], r);
+ dev_dbg(&pi->dev,
+ "friq: port 0x%x, mode %d, test=(%d,%d,%d)\n",
+ pi->port, pi->mode, e[0], e[1], r);
- return (r || (e[0] && e[1]));
+ return r || (e[0] && e[1]);
}
-
static void friq_log_adapter(struct pi_adapter *pi)
+{
+ char *mode_string[6] = { "4-bit", "8-bit", "EPP-8", "EPP-16", "EPP-32"};
-{ char *mode_string[6] = {"4-bit","8-bit",
- "EPP-8","EPP-16","EPP-32"};
-
- dev_info(&pi->dev, "Freecom IQ ASIC-2 adapter at 0x%x, mode %d (%s), delay %d\n",
- pi->port, pi->mode, mode_string[pi->mode], pi->delay);
+ dev_info(&pi->dev,
+ "Freecom IQ ASIC-2 adapter at 0x%x, mode %d (%s), delay %d\n",
+ pi->port, pi->mode, mode_string[pi->mode], pi->delay);
pi->private = 1;
friq_connect(pi);
CMD(0x9e); /* disable sleep timer */
friq_disconnect(pi);
-
}
static void friq_release_proto(struct pi_adapter *pi)
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