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305 lines
6.8 KiB
305 lines
6.8 KiB
/* |
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kbic.c (c) 1997-8 Grant R. Guenther <[email protected]> |
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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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