129 lines
2.7 KiB
C
129 lines
2.7 KiB
C
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/*
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ktti.c (c) 1998 Grant R. Guenther <grant@torque.net>
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Under the terms of the GNU General Public License.
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ktti.c is a low-level protocol driver for the KT Technology
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parallel port adapter. This adapter is used in the "PHd"
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portable hard-drives. As far as I can tell, this device
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supports 4-bit mode _only_.
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*/
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#define KTTI_VERSION "1.0"
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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 j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
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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] = { 0x10, 0x08 };
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static void ktti_write_regr( PIA *pi, int cont, int regr, int val)
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{ int r;
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r = regr + cont_map[cont];
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w0(r); w2(0xb); w2(0xa); w2(3); w2(6);
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w0(val); w2(3); w0(0); w2(6); w2(0xb);
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}
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static int ktti_read_regr( PIA *pi, int cont, int regr )
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{ int a, b, r;
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r = regr + cont_map[cont];
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w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
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a = r1(); w2(0xc); b = r1(); w2(9); w2(0xc); w2(9);
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return j44(a,b);
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}
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static void ktti_read_block( PIA *pi, char * buf, int count )
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{ int k, a, b;
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for (k=0;k<count/2;k++) {
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w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
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a = r1(); w2(0xc); b = r1(); w2(9);
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buf[2*k] = j44(a,b);
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a = r1(); w2(0xc); b = r1(); w2(9);
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buf[2*k+1] = j44(a,b);
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}
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}
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static void ktti_write_block( PIA *pi, char * buf, int count )
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{ int k;
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for (k=0;k<count/2;k++) {
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w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6);
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w0(buf[2*k]); w2(3);
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w0(buf[2*k+1]); w2(6);
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w2(0xb);
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}
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}
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static void ktti_connect ( PIA *pi )
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{ pi->saved_r0 = r0();
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pi->saved_r2 = r2();
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w2(0xb); w2(0xa); w0(0); w2(3); w2(6);
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}
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static void ktti_disconnect ( PIA *pi )
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{ w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4);
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w0(pi->saved_r0);
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w2(pi->saved_r2);
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}
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static void ktti_log_adapter( PIA *pi, char * scratch, int verbose )
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{ printk("%s: ktti %s, KT adapter at 0x%x, delay %d\n",
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pi->device,KTTI_VERSION,pi->port,pi->delay);
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}
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static struct pi_protocol ktti = {
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.owner = THIS_MODULE,
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.name = "ktti",
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.max_mode = 1,
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.epp_first = 2,
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.default_delay = 1,
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.max_units = 1,
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.write_regr = ktti_write_regr,
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.read_regr = ktti_read_regr,
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.write_block = ktti_write_block,
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.read_block = ktti_read_block,
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.connect = ktti_connect,
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.disconnect = ktti_disconnect,
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.log_adapter = ktti_log_adapter,
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};
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static int __init ktti_init(void)
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{
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return pi_register(&ktti)-1;
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}
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static void __exit ktti_exit(void)
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{
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pi_unregister(&ktti);
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}
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MODULE_LICENSE("GPL");
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module_init(ktti_init)
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module_exit(ktti_exit)
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