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path: root/drivers/ata/pata_parport/kbic.c
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Diffstat (limited to 'drivers/ata/pata_parport/kbic.c')
-rw-r--r--drivers/ata/pata_parport/kbic.c305
1 files changed, 305 insertions, 0 deletions
diff --git a/drivers/ata/pata_parport/kbic.c b/drivers/ata/pata_parport/kbic.c
new file mode 100644
index 000000000000..f0960eb68635
--- /dev/null
+++ b/drivers/ata/pata_parport/kbic.c
@@ -0,0 +1,305 @@
+/*
+ kbic.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
+ Under the terms of the GNU General Public License.
+
+ 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.
+
+*/
+
+/* Changes:
+
+ 1.01 GRG 1998.05.06 init_proto, release_proto
+
+*/
+
+#define KBIC_VERSION "1.01"
+
+#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 <linux/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( PIA *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( PIA *pi, int cont, int regr, int val)
+
+{ int s;
+
+ 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 ( PIA *pi )
+
+{ pi->saved_r0 = r0();
+ pi->saved_r2 = r2();
+ w2(4);
+}
+
+static void k951_disconnect ( PIA *pi )
+
+{ w0(pi->saved_r0);
+ w2(pi->saved_r2);
+}
+
+#define CCP(x) w2(0xc4);w0(0xaa);w0(0x55);w0(0);w0(0xff);w0(0x87);\
+ w0(0x78);w0(x);w2(0xc5);w2(0xc4);w0(0xff);
+
+static void k971_connect ( PIA *pi )
+
+{ pi->saved_r0 = r0();
+ pi->saved_r2 = r2();
+ CCP(0x20);
+ w2(4);
+}
+
+static void k971_disconnect ( PIA *pi )
+
+{ CCP(0x30);
+ w0(pi->saved_r0);
+ w2(pi->saved_r2);
+}
+
+/* counts must be congruent to 0 MOD 4, but all known applications
+ have this property.
+*/
+
+static void kbic_read_block( PIA *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( PIA *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(pi_swab16(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(pi_swab32(buf,k));
+ w2(4); w2(0); w2(4);
+ break;
+
+ }
+
+}
+
+static void kbic_log_adapter( PIA *pi, char * scratch,
+ int verbose, char * chip )
+
+{ char *mode_string[6] = {"4-bit","5/3","8-bit",
+ "EPP-8","EPP_16","EPP-32"};
+
+ printk("%s: kbic %s, KingByte %s at 0x%x, ",
+ pi->device,KBIC_VERSION,chip,pi->port);
+ printk("mode %d (%s), delay %d\n",pi->mode,
+ mode_string[pi->mode],pi->delay);
+
+}
+
+static void k951_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{ kbic_log_adapter(pi,scratch,verbose,"KBIC-951A");
+}
+
+static void k971_log_adapter( PIA *pi, char * scratch, int verbose )
+
+{ kbic_log_adapter(pi,scratch,verbose,"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 = paride_register(&k951);
+ if (rv < 0)
+ return rv;
+ rv = paride_register(&k971);
+ if (rv < 0)
+ paride_unregister(&k951);
+ return rv;
+}
+
+static void __exit kbic_exit(void)
+{
+ paride_unregister(&k951);
+ paride_unregister(&k971);
+}
+
+MODULE_LICENSE("GPL");
+module_init(kbic_init)
+module_exit(kbic_exit)
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