ktti.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:3k
源码类别:
驱动编程
开发平台:
Unix_Linux
- /*
- 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/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 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 struct pi_protocol ktti = {
- .owner = THIS_MODULE,
- .name = "ktti",
- .max_mode = 1,
- .epp_first = 2,
- .default_delay = 1,
- .max_units = 1,
- .write_regr = ktti_write_regr,
- .read_regr = ktti_read_regr,
- .write_block = ktti_write_block,
- .read_block = ktti_read_block,
- .connect = ktti_connect,
- .disconnect = ktti_disconnect,
- .log_adapter = ktti_log_adapter,
- };
- static int __init ktti_init(void)
- {
- return pi_register(&ktti)-1;
- }
- static void __exit ktti_exit(void)
- {
- pi_unregister(&ktti);
- }
- MODULE_LICENSE("GPL");
- module_init(ktti_init)
- module_exit(ktti_exit)