1 /* 2 fit2.c (c) 1998 Grant R. Guenther <grant@torque.net> 3 Under the terms of the GNU General Public License. 4 5 fit2.c is a low-level protocol driver for the older version 6 of the Fidelity International Technology parallel port adapter. 7 This adapter is used in their TransDisk 2000 and older TransDisk 8 3000 portable hard-drives. As far as I can tell, this device 9 supports 4-bit mode _only_. 10 11 Newer models of the FIT products use an enhanced protocol. 12 The "fit3" protocol module should support current drives. 13 14 */ 15 16 #define FIT2_VERSION "1.0" 17 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/delay.h> 21 #include <linux/kernel.h> 22 #include <linux/types.h> 23 #include <linux/wait.h> 24 #include <asm/io.h> 25 26 #include <linux/pata_parport.h> 27 28 #define j44(a,b) (((a>>4)&0x0f)|(b&0xf0)) 29 30 /* cont = 0 - access the IDE register file 31 cont = 1 - access the IDE command set 32 33 NB: The FIT adapter does not appear to use the control registers. 34 So, we map ALT_STATUS to STATUS and NO-OP writes to the device 35 control register - this means that IDE reset will not work on these 36 devices. 37 38 */ 39 40 static void fit2_write_regr( PIA *pi, int cont, int regr, int val) 41 42 { if (cont == 1) return; 43 w2(0xc); w0(regr); w2(4); w0(val); w2(5); w0(0); w2(4); 44 } 45 46 static int fit2_read_regr( PIA *pi, int cont, int regr ) 47 48 { int a, b, r; 49 50 if (cont) { 51 if (regr != 6) return 0xff; 52 r = 7; 53 } else r = regr + 0x10; 54 55 w2(0xc); w0(r); w2(4); w2(5); 56 w0(0); a = r1(); 57 w0(1); b = r1(); 58 w2(4); 59 60 return j44(a,b); 61 62 } 63 64 static void fit2_read_block( PIA *pi, char * buf, int count ) 65 66 { int k, a, b, c, d; 67 68 w2(0xc); w0(0x10); 69 70 for (k=0;k<count/4;k++) { 71 72 w2(4); w2(5); 73 w0(0); a = r1(); w0(1); b = r1(); 74 w0(3); c = r1(); w0(2); d = r1(); 75 buf[4*k+0] = j44(a,b); 76 buf[4*k+1] = j44(d,c); 77 78 w2(4); w2(5); 79 a = r1(); w0(3); b = r1(); 80 w0(1); c = r1(); w0(0); d = r1(); 81 buf[4*k+2] = j44(d,c); 82 buf[4*k+3] = j44(a,b); 83 84 } 85 86 w2(4); 87 88 } 89 90 static void fit2_write_block( PIA *pi, char * buf, int count ) 91 92 { int k; 93 94 95 w2(0xc); w0(0); 96 for (k=0;k<count/2;k++) { 97 w2(4); w0(buf[2*k]); 98 w2(5); w0(buf[2*k+1]); 99 } 100 w2(4); 101 } 102 103 static void fit2_connect ( PIA *pi ) 104 105 { pi->saved_r0 = r0(); 106 pi->saved_r2 = r2(); 107 w2(0xcc); 108 } 109 110 static void fit2_disconnect ( PIA *pi ) 111 112 { w0(pi->saved_r0); 113 w2(pi->saved_r2); 114 } 115 116 static void fit2_log_adapter( PIA *pi, char * scratch, int verbose ) 117 118 { printk("%s: fit2 %s, FIT 2000 adapter at 0x%x, delay %d\n", 119 pi->device,FIT2_VERSION,pi->port,pi->delay); 120 121 } 122 123 static struct pi_protocol fit2 = { 124 .owner = THIS_MODULE, 125 .name = "fit2", 126 .max_mode = 1, 127 .epp_first = 2, 128 .default_delay = 1, 129 .max_units = 1, 130 .write_regr = fit2_write_regr, 131 .read_regr = fit2_read_regr, 132 .write_block = fit2_write_block, 133 .read_block = fit2_read_block, 134 .connect = fit2_connect, 135 .disconnect = fit2_disconnect, 136 .log_adapter = fit2_log_adapter, 137 }; 138 139 static int __init fit2_init(void) 140 { 141 return paride_register(&fit2); 142 } 143 144 static void __exit fit2_exit(void) 145 { 146 paride_unregister(&fit2); 147 } 148 149 MODULE_LICENSE("GPL"); 150 module_init(fit2_init) 151 module_exit(fit2_exit) 152