| /* |
| 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 %d\n", |
| 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"); |