Loading...
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 | /* friq.c (c) 1998 Grant R. Guenther <grant@torque.net> Under the terms of the GNU General Public License friq.c is a low-level protocol driver for the Freecom "IQ" parallel port IDE adapter. Early versions of this adapter use the 'frpw' protocol. Freecom uses this adapter in a battery powered external CD-ROM drive. It is also used in LS-120 drives by Maxell and Panasonic, and other devices. The battery powered drive requires software support to control the power to the drive. This module enables the drive power when the high level driver (pcd) is loaded and disables it when the module is unloaded. Note, if the friq module is built in to the kernel, the power will never be switched off, so other means should be used to conserve battery power. */ /* Changes: 1.01 GRG 1998.12.20 Added support for soft power switch */ #define FRIQ_VERSION "1.01" #include <linux/module.h> #include <linux/init.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 CMD(x) w2(4);w0(0xff);w0(0xff);w0(0x73);w0(0x73);\ w0(0xc9);w0(0xc9);w0(0x26);w0(0x26);w0(x);w0(x); #define j44(l,h) (((l>>4)&0x0f)|(h&0xf0)) /* cont = 0 - access the IDE register file cont = 1 - access the IDE command set */ static int cont_map[2] = { 0x08, 0x10 }; static int friq_read_regr( PIA *pi, int cont, int regr ) { int h,l,r; r = regr + cont_map[cont]; CMD(r); w2(6); l = r1(); w2(4); h = r1(); w2(4); return j44(l,h); } static void friq_write_regr( PIA *pi, int cont, int regr, int val) { int r; r = regr + cont_map[cont]; CMD(r); w0(val); w2(5);w2(7);w2(5);w2(4); } static void friq_read_block_int( PIA *pi, char * buf, int count, int regr ) { int h, l, k, ph; switch(pi->mode) { case 0: CMD(regr); for (k=0;k<count;k++) { w2(6); l = r1(); w2(4); h = r1(); buf[k] = j44(l,h); } w2(4); break; case 1: ph = 2; CMD(regr+0xc0); w0(0xff); for (k=0;k<count;k++) { w2(0xa4 + ph); buf[k] = r0(); ph = 2 - ph; } w2(0xac); w2(0xa4); w2(4); break; case 2: CMD(regr+0x80); for (k=0;k<count-2;k++) buf[k] = r4(); w2(0xac); w2(0xa4); buf[count-2] = r4(); buf[count-1] = r4(); w2(4); break; case 3: CMD(regr+0x80); for (k=0;k<(count/2)-1;k++) ((u16 *)buf)[k] = r4w(); w2(0xac); w2(0xa4); buf[count-2] = r4(); buf[count-1] = r4(); w2(4); break; case 4: CMD(regr+0x80); for (k=0;k<(count/4)-1;k++) ((u32 *)buf)[k] = r4l(); buf[count-4] = r4(); buf[count-3] = r4(); w2(0xac); w2(0xa4); buf[count-2] = r4(); buf[count-1] = r4(); w2(4); break; } } static void friq_read_block( PIA *pi, char * buf, int count) { friq_read_block_int(pi,buf,count,0x08); } static void friq_write_block( PIA *pi, char * buf, int count ) { int k; switch(pi->mode) { case 0: case 1: CMD(8); w2(5); for (k=0;k<count;k++) { w0(buf[k]); w2(7);w2(5); } w2(4); break; case 2: CMD(0xc8); w2(5); for (k=0;k<count;k++) w4(buf[k]); w2(4); break; case 3: CMD(0xc8); w2(5); for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]); w2(4); break; case 4: CMD(0xc8); w2(5); for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]); w2(4); break; } } static void friq_connect ( PIA *pi ) { pi->saved_r0 = r0(); pi->saved_r2 = r2(); w2(4); } static void friq_disconnect ( PIA *pi ) { CMD(0x20); w0(pi->saved_r0); w2(pi->saved_r2); } static int friq_test_proto( PIA *pi, char * scratch, int verbose ) { int j, k, r; int e[2] = {0,0}; pi->saved_r0 = r0(); w0(0xff); udelay(20); CMD(0x3d); /* turn the power on */ udelay(500); w0(pi->saved_r0); friq_connect(pi); for (j=0;j<2;j++) { friq_write_regr(pi,0,6,0xa0+j*0x10); for (k=0;k<256;k++) { friq_write_regr(pi,0,2,k^0xaa); friq_write_regr(pi,0,3,k^0x55); if (friq_read_regr(pi,0,2) != (k^0xaa)) e[j]++; } } friq_disconnect(pi); friq_connect(pi); friq_read_block_int(pi,scratch,512,0x10); r = 0; for (k=0;k<128;k++) if (scratch[k] != k) r++; friq_disconnect(pi); if (verbose) { printk("%s: friq: port 0x%x, mode %d, test=(%d,%d,%d)\n", pi->device,pi->port,pi->mode,e[0],e[1],r); } return (r || (e[0] && e[1])); } static void friq_log_adapter( PIA *pi, char * scratch, int verbose ) { char *mode_string[6] = {"4-bit","8-bit", "EPP-8","EPP-16","EPP-32"}; printk("%s: friq %s, Freecom IQ ASIC-2 adapter at 0x%x, ", pi->device, FRIQ_VERSION,pi->port); printk("mode %d (%s), delay %d\n",pi->mode, mode_string[pi->mode],pi->delay); pi->private = 1; friq_connect(pi); CMD(0x9e); /* disable sleep timer */ friq_disconnect(pi); } static void friq_release_proto( PIA *pi) { if (pi->private) { /* turn off the power */ friq_connect(pi); CMD(0x1d); CMD(0x1e); friq_disconnect(pi); pi->private = 0; } } static struct pi_protocol friq = { .owner = THIS_MODULE, .name = "friq", .max_mode = 5, .epp_first = 2, .default_delay = 1, .max_units = 1, .write_regr = friq_write_regr, .read_regr = friq_read_regr, .write_block = friq_write_block, .read_block = friq_read_block, .connect = friq_connect, .disconnect = friq_disconnect, .test_proto = friq_test_proto, .log_adapter = friq_log_adapter, .release_proto = friq_release_proto, }; static int __init friq_init(void) { return paride_register(&friq); } static void __exit friq_exit(void) { paride_unregister(&friq); } MODULE_LICENSE("GPL"); module_init(friq_init) module_exit(friq_exit) |