ktti.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- /*
- ktti.c (c) 1998 Grant R. Guenther <grant@torque.net>
- Under the terms of the GNU General Public License.
- ktti.c is a low-level protocol driver for the KT Technology
- parallel port adapter. This adapter is used in the "PHd"
- portable hard-drives. As far as I can tell, this device
- supports 4-bit mode _only_.
- */
- #define KTTI_VERSION "1.0"
- #include <linux/module.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 j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
- /* cont = 0 - access the IDE register file
- cont = 1 - access the IDE command set
- */
- static int cont_map[2] = { 0x10, 0x08 };
- static void ktti_write_regr( PIA *pi, int cont, int regr, int val)
- { int r;
- r = regr + cont_map[cont];
- w0(r); w2(0xb); w2(0xa); w2(3); w2(6);
- w0(val); w2(3); w0(0); w2(6); w2(0xb);
- }
- static int ktti_read_regr( PIA *pi, int cont, int regr )
- { int a, b, r;
- r = regr + cont_map[cont];
- w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
- a = r1(); w2(0xc); b = r1(); w2(9); w2(0xc); w2(9);
- return j44(a,b);
- }
- static void ktti_read_block( PIA *pi, char * buf, int count )
- { int k, a, b;
- for (k=0;k<count/2;k++) {
- w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
- a = r1(); w2(0xc); b = r1(); w2(9);
- buf[2*k] = j44(a,b);
- a = r1(); w2(0xc); b = r1(); w2(9);
- buf[2*k+1] = j44(a,b);
- }
- }
- static void ktti_write_block( PIA *pi, char * buf, int count )
- { int k;
- for (k=0;k<count/2;k++) {
- w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6);
- w0(buf[2*k]); w2(3);
- w0(buf[2*k+1]); w2(6);
- w2(0xb);
- }
- }
- static void ktti_connect ( PIA *pi )
- { pi->saved_r0 = r0();
- pi->saved_r2 = r2();
- w2(0xb); w2(0xa); w0(0); w2(3); w2(6);
- }
- static void ktti_disconnect ( PIA *pi )
- { w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4);
- w0(pi->saved_r0);
- w2(pi->saved_r2);
- }
- static void ktti_log_adapter( PIA *pi, char * scratch, int verbose )
- { printk("%s: ktti %s, KT adapter at 0x%x, delay %dn",
- pi->device,KTTI_VERSION,pi->port,pi->delay);
- }
- static void ktti_init_proto( PIA *pi)
- { MOD_INC_USE_COUNT;
- }
- static void ktti_release_proto( PIA *pi)
- { MOD_DEC_USE_COUNT;
- }
- struct pi_protocol ktti = {"ktti",0,1,2,1,1,
- ktti_write_regr,
- ktti_read_regr,
- ktti_write_block,
- ktti_read_block,
- ktti_connect,
- ktti_disconnect,
- 0,
- 0,
- 0,
- ktti_log_adapter,
- ktti_init_proto,
- ktti_release_proto
- };
- #ifdef MODULE
- int init_module(void)
- { return pi_register( &ktti ) - 1;
- }
- void cleanup_module(void)
- { pi_unregister( &ktti );
- }
- #endif
- /* end of ktti.c */
- MODULE_LICENSE("GPL");