Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 "paride.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 pi_register(&fit3)-1; |
| 202 | } |
| 203 | |
| 204 | static void __exit fit3_exit(void) |
| 205 | { |
| 206 | pi_unregister(&fit3); |
| 207 | } |
| 208 | |
| 209 | MODULE_LICENSE("GPL"); |
| 210 | module_init(fit3_init) |
| 211 | module_exit(fit3_exit) |