306 lines
6.8 KiB
C
306 lines
6.8 KiB
C
/*
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kbic.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
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Under the terms of the GNU General Public License.
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This is a low-level driver for the KBIC-951A and KBIC-971A
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parallel to IDE adapter chips from KingByte Information Systems.
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The chips are almost identical, however, the wakeup code
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required for the 971A interferes with the correct operation of
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the 951A, so this driver registers itself twice, once for
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each chip.
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*/
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/* Changes:
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1.01 GRG 1998.05.06 init_proto, release_proto
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*/
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#define KBIC_VERSION "1.01"
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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#include <asm/io.h>
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#include "paride.h"
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#define r12w() (delay_p,inw(pi->port+1)&0xffff)
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#define j44(a,b) ((((a>>4)&0x0f)|(b&0xf0))^0x88)
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#define j53(w) (((w>>3)&0x1f)|((w>>4)&0xe0))
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/* cont = 0 - access the IDE register file
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cont = 1 - access the IDE command set
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*/
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static int cont_map[2] = { 0x80, 0x40 };
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static int kbic_read_regr( PIA *pi, int cont, int regr )
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{ int a, b, s;
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s = cont_map[cont];
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switch (pi->mode) {
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case 0: w0(regr|0x18|s); w2(4); w2(6); w2(4); w2(1); w0(8);
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a = r1(); w0(0x28); b = r1(); w2(4);
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return j44(a,b);
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case 1: w0(regr|0x38|s); w2(4); w2(6); w2(4); w2(5); w0(8);
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a = r12w(); w2(4);
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return j53(a);
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case 2: w0(regr|0x08|s); w2(4); w2(6); w2(4); w2(0xa5); w2(0xa1);
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a = r0(); w2(4);
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return a;
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case 3:
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case 4:
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case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr);
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a = r4(); b = r4(); w2(4); w2(0); w2(4);
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return a;
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}
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return -1;
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}
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static void kbic_write_regr( PIA *pi, int cont, int regr, int val)
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{ int s;
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s = cont_map[cont];
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switch (pi->mode) {
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case 0:
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case 1:
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case 2: w0(regr|0x10|s); w2(4); w2(6); w2(4);
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w0(val); w2(5); w2(4);
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break;
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case 3:
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case 4:
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case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr);
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w4(val); w4(val);
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w2(4); w2(0); w2(4);
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break;
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}
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}
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static void k951_connect ( PIA *pi )
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{ pi->saved_r0 = r0();
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pi->saved_r2 = r2();
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w2(4);
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}
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static void k951_disconnect ( PIA *pi )
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{ w0(pi->saved_r0);
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w2(pi->saved_r2);
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}
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#define CCP(x) w2(0xc4);w0(0xaa);w0(0x55);w0(0);w0(0xff);w0(0x87);\
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w0(0x78);w0(x);w2(0xc5);w2(0xc4);w0(0xff);
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static void k971_connect ( PIA *pi )
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{ pi->saved_r0 = r0();
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pi->saved_r2 = r2();
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CCP(0x20);
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w2(4);
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}
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static void k971_disconnect ( PIA *pi )
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{ CCP(0x30);
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w0(pi->saved_r0);
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w2(pi->saved_r2);
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}
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/* counts must be congruent to 0 MOD 4, but all known applications
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have this property.
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*/
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static void kbic_read_block( PIA *pi, char * buf, int count )
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{ int k, a, b;
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switch (pi->mode) {
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case 0: w0(0x98); w2(4); w2(6); w2(4);
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for (k=0;k<count/2;k++) {
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w2(1); w0(8); a = r1();
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w0(0x28); b = r1();
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buf[2*k] = j44(a,b);
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w2(5); b = r1();
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w0(8); a = r1();
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buf[2*k+1] = j44(a,b);
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w2(4);
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}
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break;
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case 1: w0(0xb8); w2(4); w2(6); w2(4);
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for (k=0;k<count/4;k++) {
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w0(0xb8);
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w2(4); w2(5);
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w0(8); buf[4*k] = j53(r12w());
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w0(0xb8); buf[4*k+1] = j53(r12w());
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w2(4); w2(5);
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buf[4*k+3] = j53(r12w());
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w0(8); buf[4*k+2] = j53(r12w());
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}
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w2(4);
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break;
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case 2: w0(0x88); w2(4); w2(6); w2(4);
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for (k=0;k<count/2;k++) {
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w2(0xa0); w2(0xa1); buf[2*k] = r0();
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w2(0xa5); buf[2*k+1] = r0();
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}
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w2(4);
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break;
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case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
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for (k=0;k<count;k++) buf[k] = r4();
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w2(4); w2(0); w2(4);
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break;
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case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
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for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w();
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w2(4); w2(0); w2(4);
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break;
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case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
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for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l();
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w2(4); w2(0); w2(4);
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break;
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}
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}
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static void kbic_write_block( PIA *pi, char * buf, int count )
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{ int k;
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switch (pi->mode) {
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case 0:
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case 1:
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case 2: w0(0x90); w2(4); w2(6); w2(4);
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for(k=0;k<count/2;k++) {
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w0(buf[2*k+1]); w2(0); w2(4);
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w0(buf[2*k]); w2(5); w2(4);
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}
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break;
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case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
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for(k=0;k<count/2;k++) {
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w4(buf[2*k+1]);
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w4(buf[2*k]);
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}
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w2(4); w2(0); w2(4);
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break;
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case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
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for(k=0;k<count/2;k++) w4w(pi_swab16(buf,k));
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w2(4); w2(0); w2(4);
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break;
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case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
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for(k=0;k<count/4;k++) w4l(pi_swab32(buf,k));
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w2(4); w2(0); w2(4);
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break;
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}
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}
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static void kbic_log_adapter( PIA *pi, char * scratch,
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int verbose, char * chip )
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{ char *mode_string[6] = {"4-bit","5/3","8-bit",
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"EPP-8","EPP_16","EPP-32"};
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printk("%s: kbic %s, KingByte %s at 0x%x, ",
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pi->device,KBIC_VERSION,chip,pi->port);
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printk("mode %d (%s), delay %d\n",pi->mode,
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mode_string[pi->mode],pi->delay);
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}
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static void k951_log_adapter( PIA *pi, char * scratch, int verbose )
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{ kbic_log_adapter(pi,scratch,verbose,"KBIC-951A");
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}
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static void k971_log_adapter( PIA *pi, char * scratch, int verbose )
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{ kbic_log_adapter(pi,scratch,verbose,"KBIC-971A");
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}
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static struct pi_protocol k951 = {
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.owner = THIS_MODULE,
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.name = "k951",
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.max_mode = 6,
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.epp_first = 3,
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.default_delay = 1,
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.max_units = 1,
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.write_regr = kbic_write_regr,
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.read_regr = kbic_read_regr,
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.write_block = kbic_write_block,
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.read_block = kbic_read_block,
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.connect = k951_connect,
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.disconnect = k951_disconnect,
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.log_adapter = k951_log_adapter,
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};
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static struct pi_protocol k971 = {
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.owner = THIS_MODULE,
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.name = "k971",
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.max_mode = 6,
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.epp_first = 3,
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.default_delay = 1,
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.max_units = 1,
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.write_regr = kbic_write_regr,
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.read_regr = kbic_read_regr,
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.write_block = kbic_write_block,
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.read_block = kbic_read_block,
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.connect = k971_connect,
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.disconnect = k971_disconnect,
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.log_adapter = k971_log_adapter,
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};
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static int __init kbic_init(void)
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{
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int rv;
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rv = paride_register(&k951);
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if (rv < 0)
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return rv;
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rv = paride_register(&k971);
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if (rv < 0)
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paride_unregister(&k951);
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return rv;
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}
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static void __exit kbic_exit(void)
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{
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paride_unregister(&k951);
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paride_unregister(&k971);
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}
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MODULE_LICENSE("GPL");
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module_init(kbic_init)
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module_exit(kbic_exit)
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