1 /* 2 ktti.c (c) 1998 Grant R. Guenther <grant@torque.net> 3 Under the terms of the GNU General Public License. 4 5 ktti.c is a low-level protocol driver for the KT Technology 6 parallel port adapter. This adapter is used in the "PHd" 7 portable hard-drives. As far as I can tell, this device 8 supports 4-bit mode _only_. 9 10 */ 11 12 #define KTTI_VERSION "1.0" 13 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/delay.h> 17 #include <linux/kernel.h> 18 #include <linux/types.h> 19 #include <linux/wait.h> 20 #include <asm/io.h> 21 22 #include <linux/pata_parport.h> 23 24 #define j44(a,b) (((a>>4)&0x0f)|(b&0xf0)) 25 26 /* cont = 0 - access the IDE register file 27 cont = 1 - access the IDE command set 28 */ 29 30 static int cont_map[2] = { 0x10, 0x08 }; 31 32 static void ktti_write_regr( PIA *pi, int cont, int regr, int val) 33 34 { int r; 35 36 r = regr + cont_map[cont]; 37 38 w0(r); w2(0xb); w2(0xa); w2(3); w2(6); 39 w0(val); w2(3); w0(0); w2(6); w2(0xb); 40 } 41 42 static int ktti_read_regr( PIA *pi, int cont, int regr ) 43 44 { int a, b, r; 45 46 r = regr + cont_map[cont]; 47 48 w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9); 49 a = r1(); w2(0xc); b = r1(); w2(9); w2(0xc); w2(9); 50 return j44(a,b); 51 52 } 53 54 static void ktti_read_block( PIA *pi, char * buf, int count ) 55 56 { int k, a, b; 57 58 for (k=0;k<count/2;k++) { 59 w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9); 60 a = r1(); w2(0xc); b = r1(); w2(9); 61 buf[2*k] = j44(a,b); 62 a = r1(); w2(0xc); b = r1(); w2(9); 63 buf[2*k+1] = j44(a,b); 64 } 65 } 66 67 static void ktti_write_block( PIA *pi, char * buf, int count ) 68 69 { int k; 70 71 for (k=0;k<count/2;k++) { 72 w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6); 73 w0(buf[2*k]); w2(3); 74 w0(buf[2*k+1]); w2(6); 75 w2(0xb); 76 } 77 } 78 79 static void ktti_connect ( PIA *pi ) 80 81 { pi->saved_r0 = r0(); 82 pi->saved_r2 = r2(); 83 w2(0xb); w2(0xa); w0(0); w2(3); w2(6); 84 } 85 86 static void ktti_disconnect ( PIA *pi ) 87 88 { w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4); 89 w0(pi->saved_r0); 90 w2(pi->saved_r2); 91 } 92 93 static void ktti_log_adapter( PIA *pi, char * scratch, int verbose ) 94 95 { printk("%s: ktti %s, KT adapter at 0x%x, delay %d\n", 96 pi->device,KTTI_VERSION,pi->port,pi->delay); 97 98 } 99 100 static struct pi_protocol ktti = { 101 .owner = THIS_MODULE, 102 .name = "ktti", 103 .max_mode = 1, 104 .epp_first = 2, 105 .default_delay = 1, 106 .max_units = 1, 107 .write_regr = ktti_write_regr, 108 .read_regr = ktti_read_regr, 109 .write_block = ktti_write_block, 110 .read_block = ktti_read_block, 111 .connect = ktti_connect, 112 .disconnect = ktti_disconnect, 113 .log_adapter = ktti_log_adapter, 114 }; 115 116 static int __init ktti_init(void) 117 { 118 return paride_register(&ktti); 119 } 120 121 static void __exit ktti_exit(void) 122 { 123 paride_unregister(&ktti); 124 } 125 126 MODULE_LICENSE("GPL"); 127 module_init(ktti_init) 128 module_exit(ktti_exit) 129