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path: root/drivers/ata/pata_parport/kbic.c
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-rw-r--r--drivers/ata/pata_parport/kbic.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/drivers/ata/pata_parport/kbic.c b/drivers/ata/pata_parport/kbic.c
new file mode 100644
index 0000000000..fca322627b
--- /dev/null
+++ b/drivers/ata/pata_parport/kbic.c
@@ -0,0 +1,308 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * (c) 1997-1998 Grant R. Guenther <grant@torque.net>
+ *
+ * This is a low-level driver for the KBIC-951A and KBIC-971A
+ * parallel to IDE adapter chips from KingByte Information Systems.
+ *
+ * The chips are almost identical, however, the wakeup code
+ * required for the 971A interferes with the correct operation of
+ * the 951A, so this driver registers itself twice, once for
+ * each chip.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+#include <asm/io.h>
+#include "pata_parport.h"
+
+#define r12w() (delay_p, inw(pi->port + 1) & 0xffff)
+
+#define j44(a, b) ((((a >> 4) & 0x0f) | (b & 0xf0)) ^ 0x88)
+#define j53(w) (((w >> 3) & 0x1f) | ((w >> 4) & 0xe0))
+
+
+/*
+ * cont = 0 - access the IDE register file
+ * cont = 1 - access the IDE command set
+ */
+static int cont_map[2] = { 0x80, 0x40 };
+
+static int kbic_read_regr(struct pi_adapter *pi, int cont, int regr)
+{
+ int a, b, s;
+
+ s = cont_map[cont];
+
+ switch (pi->mode) {
+ case 0:
+ w0(regr | 0x18 | s); w2(4); w2(6); w2(4); w2(1); w0(8);
+ a = r1(); w0(0x28); b = r1(); w2(4);
+ return j44(a, b);
+ case 1:
+ w0(regr|0x38 | s); w2(4); w2(6); w2(4); w2(5); w0(8);
+ a = r12w(); w2(4);
+ return j53(a);
+ case 2:
+ w0(regr | 0x08 | s); w2(4); w2(6); w2(4); w2(0xa5); w2(0xa1);
+ a = r0(); w2(4);
+ return a;
+ case 3:
+ case 4:
+ case 5:
+ w0(0x20 | s); w2(4); w2(6); w2(4); w3(regr);
+ a = r4(); b = r4(); w2(4); w2(0); w2(4);
+ return a;
+ }
+
+ return -1;
+}
+
+static void kbic_write_regr(struct pi_adapter *pi, int cont, int regr, int val)
+{
+ int s = cont_map[cont];
+
+ switch (pi->mode) {
+ case 0:
+ case 1:
+ case 2:
+ w0(regr | 0x10 | s); w2(4); w2(6); w2(4);
+ w0(val); w2(5); w2(4);
+ break;
+ case 3:
+ case 4:
+ case 5:
+ w0(0x20 | s); w2(4); w2(6); w2(4); w3(regr);
+ w4(val); w4(val);
+ w2(4); w2(0); w2(4);
+ break;
+ }
+}
+
+static void k951_connect(struct pi_adapter *pi)
+{
+ pi->saved_r0 = r0();
+ pi->saved_r2 = r2();
+ w2(4);
+}
+
+static void k951_disconnect(struct pi_adapter *pi)
+{
+ w0(pi->saved_r0);
+ w2(pi->saved_r2);
+}
+
+#define CCP(x) \
+ do { \
+ w2(0xc4); w0(0xaa); w0(0x55); \
+ w0(0); w0(0xff); w0(0x87); \
+ w0(0x78); w0(x); w2(0xc5); \
+ w2(0xc4); w0(0xff); \
+ } while (0)
+
+static void k971_connect(struct pi_adapter *pi)
+{
+ pi->saved_r0 = r0();
+ pi->saved_r2 = r2();
+ CCP(0x20);
+ w2(4);
+}
+
+static void k971_disconnect(struct pi_adapter *pi)
+{
+ CCP(0x30);
+ w0(pi->saved_r0);
+ w2(pi->saved_r2);
+}
+
+/*
+ * count must be congruent to 0 MOD 4, but all known applications
+ *have this property.
+ */
+static void kbic_read_block(struct pi_adapter *pi, char *buf, int count)
+{
+ int k, a, b;
+
+ switch (pi->mode) {
+ case 0:
+ w0(0x98); w2(4); w2(6); w2(4);
+ for (k = 0; k < count / 2; k++) {
+ w2(1); w0(8);
+ a = r1();
+ w0(0x28);
+ b = r1();
+ buf[2 * k] = j44(a, b);
+ w2(5);
+ b = r1();
+ w0(8);
+ a = r1();
+ buf[2 * k + 1] = j44(a, b);
+ w2(4);
+ }
+ break;
+ case 1:
+ w0(0xb8); w2(4); w2(6); w2(4);
+ for (k = 0; k < count / 4; k++) {
+ w0(0xb8);
+ w2(4); w2(5);
+ w0(8);
+ buf[4 * k] = j53(r12w());
+ w0(0xb8);
+ buf[4 * k + 1] = j53(r12w());
+ w2(4); w2(5);
+ buf[4 * k + 3] = j53(r12w());
+ w0(8);
+ buf[4 * k + 2] = j53(r12w());
+ }
+ w2(4);
+ break;
+ case 2:
+ w0(0x88); w2(4); w2(6); w2(4);
+ for (k = 0; k < count / 2; k++) {
+ w2(0xa0); w2(0xa1);
+ buf[2 * k] = r0();
+ w2(0xa5);
+ buf[2 * k + 1] = r0();
+ }
+ w2(4);
+ break;
+ case 3:
+ w0(0xa0); w2(4); w2(6); w2(4); w3(0);
+ for (k = 0; k < count; k++)
+ buf[k] = r4();
+ w2(4); w2(0); w2(4);
+ break;
+ case 4:
+ w0(0xa0); w2(4); w2(6); w2(4); w3(0);
+ for (k = 0; k < count / 2; k++)
+ ((u16 *)buf)[k] = r4w();
+ w2(4); w2(0); w2(4);
+ break;
+ case 5:
+ w0(0xa0); w2(4); w2(6); w2(4); w3(0);
+ for (k = 0; k < count / 4; k++)
+ ((u32 *)buf)[k] = r4l();
+ w2(4); w2(0); w2(4);
+ break;
+ }
+}
+
+static void kbic_write_block(struct pi_adapter *pi, char *buf, int count)
+{
+ int k;
+
+ switch (pi->mode) {
+ case 0:
+ case 1:
+ case 2:
+ w0(0x90); w2(4); w2(6); w2(4);
+ for (k = 0; k < count / 2; k++) {
+ w0(buf[2 * k + 1]);
+ w2(0); w2(4);
+ w0(buf[2 * k]);
+ w2(5); w2(4);
+ }
+ break;
+ case 3:
+ w0(0xa0); w2(4); w2(6); w2(4); w3(0);
+ for (k = 0; k < count / 2; k++) {
+ w4(buf[2 * k + 1]);
+ w4(buf[2 * k]);
+ }
+ w2(4); w2(0); w2(4);
+ break;
+ case 4:
+ w0(0xa0); w2(4); w2(6); w2(4); w3(0);
+ for (k = 0; k < count / 2; k++)
+ w4w(swab16(((u16 *)buf)[k]));
+ w2(4); w2(0); w2(4);
+ break;
+ case 5:
+ w0(0xa0); w2(4); w2(6); w2(4); w3(0);
+ for (k = 0; k < count / 4; k++)
+ w4l(swab16(((u16 *)buf)[2 * k]) |
+ swab16(((u16 *)buf)[2 * k + 1]) << 16);
+ w2(4); w2(0); w2(4);
+ break;
+ }
+}
+
+static void kbic_log_adapter(struct pi_adapter *pi, char *chip)
+{
+ char *mode[6] = { "4-bit", "5/3", "8-bit", "EPP-8", "EPP_16", "EPP-32"};
+
+ dev_info(&pi->dev, "KingByte %s at 0x%x, mode %d (%s), delay %d\n",
+ chip, pi->port, pi->mode, mode[pi->mode], pi->delay);
+}
+
+static void k951_log_adapter(struct pi_adapter *pi)
+{
+ kbic_log_adapter(pi, "KBIC-951A");
+}
+
+static void k971_log_adapter(struct pi_adapter *pi)
+{
+ kbic_log_adapter(pi, "KBIC-971A");
+}
+
+static struct pi_protocol k951 = {
+ .owner = THIS_MODULE,
+ .name = "k951",
+ .max_mode = 6,
+ .epp_first = 3,
+ .default_delay = 1,
+ .max_units = 1,
+ .write_regr = kbic_write_regr,
+ .read_regr = kbic_read_regr,
+ .write_block = kbic_write_block,
+ .read_block = kbic_read_block,
+ .connect = k951_connect,
+ .disconnect = k951_disconnect,
+ .log_adapter = k951_log_adapter,
+};
+
+static struct pi_protocol k971 = {
+ .owner = THIS_MODULE,
+ .name = "k971",
+ .max_mode = 6,
+ .epp_first = 3,
+ .default_delay = 1,
+ .max_units = 1,
+ .write_regr = kbic_write_regr,
+ .read_regr = kbic_read_regr,
+ .write_block = kbic_write_block,
+ .read_block = kbic_read_block,
+ .connect = k971_connect,
+ .disconnect = k971_disconnect,
+ .log_adapter = k971_log_adapter,
+};
+
+static int __init kbic_init(void)
+{
+ int rv;
+
+ rv = pata_parport_register_driver(&k951);
+ if (rv < 0)
+ return rv;
+ rv = pata_parport_register_driver(&k971);
+ if (rv < 0)
+ pata_parport_unregister_driver(&k951);
+ return rv;
+}
+
+static void __exit kbic_exit(void)
+{
+ pata_parport_unregister_driver(&k951);
+ pata_parport_unregister_driver(&k971);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Grant R. Guenther <grant@torque.net>");
+MODULE_DESCRIPTION("KingByte Information Systems KBIC-951A and KBIC-971A "
+ "parallel port IDE adapter protocol driver");
+module_init(kbic_init)
+module_exit(kbic_exit)
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-24 01:16:36 +0000