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128 lines
2.7 KiB
128 lines
2.7 KiB
/* |
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ktti.c (c) 1998 Grant R. Guenther <[email protected]> |
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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 paride_register(&ktti); |
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} |
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static void __exit ktti_exit(void) |
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{ |
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paride_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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