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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 | /* dstr.c (c) 1997-8 Grant R. Guenther <grant@torque.net> Under the terms of the GNU General Public License. dstr.c is a low-level protocol driver for the DataStor EP2000 parallel to IDE adapter chip. */ /* Changes: 1.01 GRG 1998.05.06 init_proto, release_proto */ #define DSTR_VERSION "1.01" #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" /* mode codes: 0 nybble reads, 8-bit writes 1 8-bit reads and writes 2 8-bit EPP mode 3 EPP-16 4 EPP-32 */ #define j44(a,b) (((a>>3)&0x07)|((~a>>4)&0x08)|((b<<1)&0x70)|((~b)&0x80)) #define P1 w2(5);w2(0xd);w2(5);w2(4); #define P2 w2(5);w2(7);w2(5);w2(4); #define P3 w2(6);w2(4);w2(6);w2(4); /* cont = 0 - access the IDE register file cont = 1 - access the IDE command set */ static int cont_map[2] = { 0x20, 0x40 }; static int dstr_read_regr( PIA *pi, int cont, int regr ) { int a, b, r; r = regr + cont_map[cont]; w0(0x81); P1; if (pi->mode) { w0(0x11); } else { w0(1); } P2; w0(r); P1; switch (pi->mode) { case 0: w2(6); a = r1(); w2(4); w2(6); b = r1(); w2(4); return j44(a,b); case 1: w0(0); w2(0x26); a = r0(); w2(4); return a; case 2: case 3: case 4: w2(0x24); a = r4(); w2(4); return a; } return -1; } static void dstr_write_regr( PIA *pi, int cont, int regr, int val ) { int r; r = regr + cont_map[cont]; w0(0x81); P1; if (pi->mode >= 2) { w0(0x11); } else { w0(1); } P2; w0(r); P1; switch (pi->mode) { case 0: case 1: w0(val); w2(5); w2(7); w2(5); w2(4); break; case 2: case 3: case 4: w4(val); break; } } #define CCP(x) w0(0xff);w2(0xc);w2(4);\ w0(0xaa);w0(0x55);w0(0);w0(0xff);w0(0x87);w0(0x78);\ w0(x);w2(5);w2(4); static void dstr_connect ( PIA *pi ) { pi->saved_r0 = r0(); pi->saved_r2 = r2(); w2(4); CCP(0xe0); w0(0xff); } static void dstr_disconnect ( PIA *pi ) { CCP(0x30); w0(pi->saved_r0); w2(pi->saved_r2); } static void dstr_read_block( PIA *pi, char * buf, int count ) { int k, a, b; w0(0x81); P1; if (pi->mode) { w0(0x19); } else { w0(9); } P2; w0(0x82); P1; P3; w0(0x20); P1; switch (pi->mode) { case 0: for (k=0;k<count;k++) { w2(6); a = r1(); w2(4); w2(6); b = r1(); w2(4); buf[k] = j44(a,b); } break; case 1: w0(0); for (k=0;k<count;k++) { w2(0x26); buf[k] = r0(); w2(0x24); } w2(4); break; case 2: w2(0x24); for (k=0;k<count;k++) buf[k] = r4(); w2(4); break; case 3: w2(0x24); for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w(); w2(4); break; case 4: w2(0x24); for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l(); w2(4); break; } } static void dstr_write_block( PIA *pi, char * buf, int count ) { int k; w0(0x81); P1; if (pi->mode) { w0(0x19); } else { w0(9); } P2; w0(0x82); P1; P3; w0(0x20); P1; switch (pi->mode) { case 0: case 1: for (k=0;k<count;k++) { w2(5); w0(buf[k]); w2(7); } w2(5); w2(4); break; case 2: w2(0xc5); for (k=0;k<count;k++) w4(buf[k]); w2(0xc4); break; case 3: w2(0xc5); for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]); w2(0xc4); break; case 4: w2(0xc5); for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]); w2(0xc4); break; } } static void dstr_log_adapter( PIA *pi, char * scratch, int verbose ) { char *mode_string[5] = {"4-bit","8-bit","EPP-8", "EPP-16","EPP-32"}; printk("%s: dstr %s, DataStor EP2000 at 0x%x, ", pi->device,DSTR_VERSION,pi->port); printk("mode %d (%s), delay %d\n",pi->mode, mode_string[pi->mode],pi->delay); } static void dstr_init_proto( PIA *pi) { MOD_INC_USE_COUNT; } static void dstr_release_proto( PIA *pi) { MOD_DEC_USE_COUNT; } struct pi_protocol dstr = {"dstr",0,5,2,1,1, dstr_write_regr, dstr_read_regr, dstr_write_block, dstr_read_block, dstr_connect, dstr_disconnect, 0, 0, 0, dstr_log_adapter, dstr_init_proto, dstr_release_proto }; #ifdef MODULE int init_module(void) { return pi_register( &dstr ) - 1; } void cleanup_module(void) { pi_unregister( &dstr ); } #endif /* end of dstr.c */ |