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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 | // SPDX-License-Identifier: GPL-2.0-or-later /* * (c) 1997-8 Grant R. Guenther <grant@torque.net> * * aten.c is a low-level protocol driver for the ATEN EH-100 * parallel port adapter. The EH-100 supports 4-bit and 8-bit * modes only. There is also an EH-132 which supports EPP mode * transfers. The EH-132 is not yet supported. */ #include <linux/module.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/kernel.h> #include <linux/wait.h> #include <linux/types.h> #include <asm/io.h> #include "pata_parport.h" #define j44(a,b) ((((a>>4)&0x0f)|(b&0xf0))^0x88) /* * cont = 0 - access the IDE register file * cont = 1 - access the IDE command set */ static int cont_map[2] = { 0x08, 0x20 }; static void aten_write_regr(struct pi_adapter *pi, int cont, int regr, int val) { int r = regr + cont_map[cont] + 0x80; w0(r); w2(0xe); w2(6); w0(val); w2(7); w2(6); w2(0xc); } static int aten_read_regr(struct pi_adapter *pi, int cont, int regr) { int a, b, r; r = regr + cont_map[cont] + 0x40; switch (pi->mode) { case 0: w0(r); w2(0xe); w2(6); w2(7); w2(6); w2(0); a = r1(); w0(0x10); b = r1(); w2(0xc); return j44(a,b); case 1: r |= 0x10; w0(r); w2(0xe); w2(6); w0(0xff); w2(0x27); w2(0x26); w2(0x20); a = r0(); w2(0x26); w2(0xc); return a; } return -1; } static void aten_read_block(struct pi_adapter *pi, char *buf, int count) { int k, a, b, c, d; switch (pi->mode) { case 0: w0(0x48); w2(0xe); w2(6); for (k = 0; k < count / 2; k++) { w2(7); w2(6); w2(2); a = r1(); w0(0x58); b = r1(); w2(0); d = r1(); w0(0x48); c = r1(); buf[2 * k] = j44(c, d); buf[2 * k + 1] = j44(a, b); } w2(0xc); break; case 1: w0(0x58); w2(0xe); w2(6); for (k = 0; k < count / 2; k++) { w2(0x27); w2(0x26); w2(0x22); a = r0(); w2(0x20); b = r0(); buf[2 * k] = b; buf[2 * k + 1] = a; } w2(0x26); w2(0xc); break; } } static void aten_write_block(struct pi_adapter *pi, char *buf, int count) { int k; w0(0x88); w2(0xe); w2(6); for (k = 0; k < count / 2; k++) { w0(buf[2 * k + 1]); w2(0xe); w2(6); w0(buf[2 * k]); w2(7); w2(6); } w2(0xc); } static void aten_connect(struct pi_adapter *pi) { pi->saved_r0 = r0(); pi->saved_r2 = r2(); w2(0xc); } static void aten_disconnect(struct pi_adapter *pi) { w0(pi->saved_r0); w2(pi->saved_r2); } static void aten_log_adapter(struct pi_adapter *pi) { char *mode_string[2] = { "4-bit", "8-bit" }; dev_info(&pi->dev, "ATEN EH-100 at 0x%x, mode %d (%s), delay %d\n", pi->port, pi->mode, mode_string[pi->mode], pi->delay); } static struct pi_protocol aten = { .owner = THIS_MODULE, .name = "aten", .max_mode = 2, .epp_first = 2, .default_delay = 1, .max_units = 1, .write_regr = aten_write_regr, .read_regr = aten_read_regr, .write_block = aten_write_block, .read_block = aten_read_block, .connect = aten_connect, .disconnect = aten_disconnect, .log_adapter = aten_log_adapter, }; MODULE_LICENSE("GPL"); MODULE_AUTHOR("Grant R. Guenther <grant@torque.net>"); MODULE_DESCRIPTION("ATEN EH-100 parallel port IDE adapter protocol driver"); module_pata_parport_driver(aten); |