| /* |
| 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 "paride.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) |