1 /* 2 fit3.c (c) 1998 Grant R. Guenther <grant@torque.net> 3 Under the terms of the GNU General Public License. 4 5 fit3.c is a low-level protocol driver for newer models 6 of the Fidelity International Technology parallel port adapter. 7 This adapter is used in their TransDisk 3000 portable 8 hard-drives, as well as CD-ROM, PD-CD and other devices. 9 10 The TD-2000 and certain older devices use a different protocol. 11 Try the fit2 protocol module with them. 12 13 NB: The FIT adapters do not appear to support the control 14 registers. So, we map ALT_STATUS to STATUS and NO-OP writes 15 to the device control register - this means that IDE reset 16 will not work on these devices. 17 18 */ 19 20 #define FIT3_VERSION "1.0" 21 22 #include <linux/module.h> 23 #include <linux/init.h> 24 #include <linux/delay.h> 25 #include <linux/kernel.h> 26 #include <linux/types.h> 27 #include <linux/wait.h> 28 #include <asm/io.h> 29 30 #include <linux/pata_parport.h> 31 32 #define j44(a,b) (((a>>3)&0x0f)|((b<<1)&0xf0)) 33 34 #define w7(byte) {out_p(7,byte);} 35 #define r7() (in_p(7) & 0xff) 36 37 /* cont = 0 - access the IDE register file 38 cont = 1 - access the IDE command set 39 40 */ 41 42 static void fit3_write_regr( PIA *pi, int cont, int regr, int val) 43 44 { if (cont == 1) return; 45 46 switch (pi->mode) { 47 48 case 0: 49 case 1: w2(0xc); w0(regr); w2(0x8); w2(0xc); 50 w0(val); w2(0xd); 51 w0(0); w2(0xc); 52 break; 53 54 case 2: w2(0xc); w0(regr); w2(0x8); w2(0xc); 55 w4(val); w4(0); 56 w2(0xc); 57 break; 58 59 } 60 } 61 62 static int fit3_read_regr( PIA *pi, int cont, int regr ) 63 64 { int a, b; 65 66 if (cont) { 67 if (regr != 6) return 0xff; 68 regr = 7; 69 } 70 71 switch (pi->mode) { 72 73 case 0: w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc); 74 w2(0xd); a = r1(); 75 w2(0xf); b = r1(); 76 w2(0xc); 77 return j44(a,b); 78 79 case 1: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc); 80 w2(0xec); w2(0xee); w2(0xef); a = r0(); 81 w2(0xc); 82 return a; 83 84 case 2: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc); 85 w2(0xec); 86 a = r4(); b = r4(); 87 w2(0xc); 88 return a; 89 90 } 91 return -1; 92 93 } 94 95 static void fit3_read_block( PIA *pi, char * buf, int count ) 96 97 { int k, a, b, c, d; 98 99 switch (pi->mode) { 100 101 case 0: w2(0xc); w0(0x10); w2(0x8); w2(0xc); 102 for (k=0;k<count/2;k++) { 103 w2(0xd); a = r1(); 104 w2(0xf); b = r1(); 105 w2(0xc); c = r1(); 106 w2(0xe); d = r1(); 107 buf[2*k ] = j44(a,b); 108 buf[2*k+1] = j44(c,d); 109 } 110 w2(0xc); 111 break; 112 113 case 1: w2(0xc); w0(0x90); w2(0x8); w2(0xc); 114 w2(0xec); w2(0xee); 115 for (k=0;k<count/2;k++) { 116 w2(0xef); a = r0(); 117 w2(0xee); b = r0(); 118 buf[2*k ] = a; 119 buf[2*k+1] = b; 120 } 121 w2(0xec); 122 w2(0xc); 123 break; 124 125 case 2: w2(0xc); w0(0x90); w2(0x8); w2(0xc); 126 w2(0xec); 127 for (k=0;k<count;k++) buf[k] = r4(); 128 w2(0xc); 129 break; 130 131 } 132 } 133 134 static void fit3_write_block( PIA *pi, char * buf, int count ) 135 136 { int k; 137 138 switch (pi->mode) { 139 140 case 0: 141 case 1: w2(0xc); w0(0); w2(0x8); w2(0xc); 142 for (k=0;k<count/2;k++) { 143 w0(buf[2*k ]); w2(0xd); 144 w0(buf[2*k+1]); w2(0xc); 145 } 146 break; 147 148 case 2: w2(0xc); w0(0); w2(0x8); w2(0xc); 149 for (k=0;k<count;k++) w4(buf[k]); 150 w2(0xc); 151 break; 152 } 153 } 154 155 static void fit3_connect ( PIA *pi ) 156 157 { pi->saved_r0 = r0(); 158 pi->saved_r2 = r2(); 159 w2(0xc); w0(0); w2(0xa); 160 if (pi->mode == 2) { 161 w2(0xc); w0(0x9); w2(0x8); w2(0xc); 162 } 163 } 164 165 static void fit3_disconnect ( PIA *pi ) 166 167 { w2(0xc); w0(0xa); w2(0x8); w2(0xc); 168 w0(pi->saved_r0); 169 w2(pi->saved_r2); 170 } 171 172 static void fit3_log_adapter( PIA *pi, char * scratch, int verbose ) 173 174 { char *mode_string[3] = {"4-bit","8-bit","EPP"}; 175 176 printk("%s: fit3 %s, FIT 3000 adapter at 0x%x, " 177 "mode %d (%s), delay %d\n", 178 pi->device,FIT3_VERSION,pi->port, 179 pi->mode,mode_string[pi->mode],pi->delay); 180 181 } 182 183 static struct pi_protocol fit3 = { 184 .owner = THIS_MODULE, 185 .name = "fit3", 186 .max_mode = 3, 187 .epp_first = 2, 188 .default_delay = 1, 189 .max_units = 1, 190 .write_regr = fit3_write_regr, 191 .read_regr = fit3_read_regr, 192 .write_block = fit3_write_block, 193 .read_block = fit3_read_block, 194 .connect = fit3_connect, 195 .disconnect = fit3_disconnect, 196 .log_adapter = fit3_log_adapter, 197 }; 198 199 static int __init fit3_init(void) 200 { 201 return paride_register(&fit3); 202 } 203 204 static void __exit fit3_exit(void) 205 { 206 paride_unregister(&fit3); 207 } 208 209 MODULE_LICENSE("GPL"); 210 module_init(fit3_init) 211 module_exit(fit3_exit) 212