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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | /* ktti.c (c) 1998 Grant R. Guenther <grant@torque.net> Under the terms of the GNU 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 <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 */ |