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 #include <linux/module.h> 17 #include <linux/init.h> 18 #include <linux/delay.h> 19 #include <linux/kernel.h> 20 #include <linux/types.h> 21 #include <linux/wait.h> 22 #include <asm/io.h> 23 #include "pata_parport.h" 24 25 #define j44(a,b) (((a>>4)&0x0f)|(b&0xf0)) 26 27 /* cont = 0 - access the IDE register file 28 cont = 1 - access the IDE command set 29 30 NB: The FIT adapter does not appear to use the control registers. 31 So, we map ALT_STATUS to STATUS and NO-OP writes to the device 32 control register - this means that IDE reset will not work on these 33 devices. 34 35 */ 36 37 static void fit2_write_regr(struct pi_adapter *pi, int cont, int regr, int val) 38 39 { if (cont == 1) return; 40 w2(0xc); w0(regr); w2(4); w0(val); w2(5); w0(0); w2(4); 41 } 42 43 static int fit2_read_regr(struct pi_adapter *pi, int cont, int regr) 44 45 { int a, b, r; 46 47 if (cont) { 48 if (regr != 6) return 0xff; 49 r = 7; 50 } else r = regr + 0x10; 51 52 w2(0xc); w0(r); w2(4); w2(5); 53 w0(0); a = r1(); 54 w0(1); b = r1(); 55 w2(4); 56 57 return j44(a,b); 58 59 } 60 61 static void fit2_read_block(struct pi_adapter *pi, char *buf, int count) 62 63 { int k, a, b, c, d; 64 65 w2(0xc); w0(0x10); 66 67 for (k=0;k<count/4;k++) { 68 69 w2(4); w2(5); 70 w0(0); a = r1(); w0(1); b = r1(); 71 w0(3); c = r1(); w0(2); d = r1(); 72 buf[4*k+0] = j44(a,b); 73 buf[4*k+1] = j44(d,c); 74 75 w2(4); w2(5); 76 a = r1(); w0(3); b = r1(); 77 w0(1); c = r1(); w0(0); d = r1(); 78 buf[4*k+2] = j44(d,c); 79 buf[4*k+3] = j44(a,b); 80 81 } 82 83 w2(4); 84 85 } 86 87 static void fit2_write_block(struct pi_adapter *pi, char *buf, int count) 88 89 { int k; 90 91 92 w2(0xc); w0(0); 93 for (k=0;k<count/2;k++) { 94 w2(4); w0(buf[2*k]); 95 w2(5); w0(buf[2*k+1]); 96 } 97 w2(4); 98 } 99 100 static void fit2_connect(struct pi_adapter *pi) 101 102 { pi->saved_r0 = r0(); 103 pi->saved_r2 = r2(); 104 w2(0xcc); 105 } 106 107 static void fit2_disconnect(struct pi_adapter *pi) 108 109 { w0(pi->saved_r0); 110 w2(pi->saved_r2); 111 } 112 113 static void fit2_log_adapter(struct pi_adapter *pi) 114 115 { 116 dev_info(&pi->dev, "FIT 2000 adapter at 0x%x, delay %d\n", 117 pi->port, pi->delay); 118 119 } 120 121 static struct pi_protocol fit2 = { 122 .owner = THIS_MODULE, 123 .name = "fit2", 124 .max_mode = 1, 125 .epp_first = 2, 126 .default_delay = 1, 127 .max_units = 1, 128 .write_regr = fit2_write_regr, 129 .read_regr = fit2_read_regr, 130 .write_block = fit2_write_block, 131 .read_block = fit2_read_block, 132 .connect = fit2_connect, 133 .disconnect = fit2_disconnect, 134 .log_adapter = fit2_log_adapter, 135 }; 136 137 MODULE_LICENSE("GPL"); 138 module_pata_parport_driver(fit2); 139