kbic.c
资源名称:block.rar [点击查看]
上传用户:ajay2009
上传日期:2009-05-22
资源大小:495k
文件大小:7k
源码类别:
驱动编程
开发平台:
Unix_Linux
- /*
- 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 %dn",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)
- {
- return (pi_register(&k951)||pi_register(&k971))-1;
- }
- static void __exit kbic_exit(void)
- {
- pi_unregister(&k951);
- pi_unregister(&k971);
- }
- MODULE_LICENSE("GPL");
- module_init(kbic_init)
- module_exit(kbic_exit)