David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 1 | /** |
| 2 | * @file me0600_ttli.c |
| 3 | * |
| 4 | * @brief ME-630 TTL input subdevice instance. |
| 5 | * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| 6 | * @author Guenter Gebhardt |
| 7 | * @author Krzysztof Gantzke (k.gantzke@meilhaus.de) |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| 12 | * |
| 13 | * This file is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 26 | */ |
| 27 | |
| 28 | #ifndef __KERNEL__ |
| 29 | # define __KERNEL__ |
| 30 | #endif |
| 31 | |
| 32 | /* |
| 33 | * Includes |
| 34 | */ |
| 35 | #include <linux/module.h> |
| 36 | |
| 37 | #include <linux/slab.h> |
| 38 | #include <linux/spinlock.h> |
| 39 | #include <asm/io.h> |
| 40 | #include <linux/types.h> |
| 41 | |
| 42 | #include "medefines.h" |
| 43 | #include "meinternal.h" |
| 44 | #include "meerror.h" |
| 45 | |
| 46 | #include "medebug.h" |
| 47 | #include "me0600_ttli_reg.h" |
| 48 | #include "me0600_ttli.h" |
| 49 | |
| 50 | /* |
| 51 | * Defines |
| 52 | */ |
| 53 | |
| 54 | /* |
| 55 | * Functions |
| 56 | */ |
| 57 | |
| 58 | static int me0600_ttli_io_reset_subdevice(struct me_subdevice *subdevice, |
| 59 | struct file *filep, int flags) |
| 60 | { |
| 61 | if (flags) { |
| 62 | PERROR("Invalid flag specified.\n"); |
| 63 | return ME_ERRNO_INVALID_FLAGS; |
| 64 | } |
| 65 | |
| 66 | PDEBUG("executed.\n"); |
| 67 | return ME_ERRNO_SUCCESS; |
| 68 | } |
| 69 | |
| 70 | static int me0600_ttli_io_single_config(me_subdevice_t * subdevice, |
| 71 | struct file *filep, |
| 72 | int channel, |
| 73 | int single_config, |
| 74 | int ref, |
| 75 | int trig_chan, |
| 76 | int trig_type, int trig_edge, int flags) |
| 77 | { |
| 78 | me0600_ttli_subdevice_t *instance; |
| 79 | int err = ME_ERRNO_SUCCESS; |
| 80 | |
| 81 | PDEBUG("executed.\n"); |
| 82 | |
| 83 | instance = (me0600_ttli_subdevice_t *) subdevice; |
| 84 | |
| 85 | ME_SUBDEVICE_ENTER; |
| 86 | |
| 87 | spin_lock(&instance->subdevice_lock); |
| 88 | |
| 89 | switch (flags) { |
| 90 | case ME_IO_SINGLE_CONFIG_NO_FLAGS: |
| 91 | case ME_IO_SINGLE_CONFIG_DIO_BYTE: |
| 92 | if (channel == 0) { |
| 93 | if (single_config != ME_SINGLE_CONFIG_DIO_INPUT) { |
| 94 | PERROR("Invalid port direction specified.\n"); |
| 95 | err = ME_ERRNO_INVALID_SINGLE_CONFIG; |
| 96 | } |
| 97 | } else { |
| 98 | PERROR("Invalid channel specified.\n"); |
| 99 | err = ME_ERRNO_INVALID_CHANNEL; |
| 100 | } |
| 101 | |
| 102 | break; |
| 103 | |
| 104 | default: |
| 105 | PERROR("Invalid flags specified.\n"); |
| 106 | |
| 107 | err = ME_ERRNO_INVALID_FLAGS; |
| 108 | |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | spin_unlock(&instance->subdevice_lock); |
| 113 | |
| 114 | ME_SUBDEVICE_EXIT; |
| 115 | |
| 116 | return err; |
| 117 | } |
| 118 | |
| 119 | static int me0600_ttli_io_single_read(me_subdevice_t * subdevice, |
| 120 | struct file *filep, |
| 121 | int channel, |
| 122 | int *value, int time_out, int flags) |
| 123 | { |
| 124 | me0600_ttli_subdevice_t *instance; |
| 125 | int err = ME_ERRNO_SUCCESS; |
| 126 | |
| 127 | PDEBUG("executed.\n"); |
| 128 | |
| 129 | instance = (me0600_ttli_subdevice_t *) subdevice; |
| 130 | |
| 131 | ME_SUBDEVICE_ENTER; |
| 132 | |
| 133 | spin_lock(&instance->subdevice_lock); |
| 134 | |
| 135 | switch (flags) { |
| 136 | case ME_IO_SINGLE_TYPE_DIO_BIT: |
| 137 | if ((channel >= 0) && (channel < 8)) { |
| 138 | *value = inb(instance->port_reg) & (0x1 << channel); |
| 139 | } else { |
| 140 | PERROR("Invalid bit number specified.\n"); |
| 141 | err = ME_ERRNO_INVALID_CHANNEL; |
| 142 | } |
| 143 | break; |
| 144 | |
| 145 | case ME_IO_SINGLE_NO_FLAGS: |
| 146 | case ME_IO_SINGLE_TYPE_DIO_BYTE: |
| 147 | if (channel == 0) { |
| 148 | *value = inb(instance->port_reg); |
| 149 | } else { |
| 150 | PERROR("Invalid byte number specified.\n"); |
| 151 | err = ME_ERRNO_INVALID_CHANNEL; |
| 152 | } |
| 153 | break; |
| 154 | |
| 155 | default: |
| 156 | PERROR("Invalid flags specified.\n"); |
| 157 | err = ME_ERRNO_INVALID_FLAGS; |
| 158 | } |
| 159 | |
| 160 | spin_unlock(&instance->subdevice_lock); |
| 161 | |
| 162 | ME_SUBDEVICE_EXIT; |
| 163 | |
| 164 | return err; |
| 165 | } |
| 166 | |
| 167 | static int me0600_ttli_query_number_channels(me_subdevice_t * subdevice, |
| 168 | int *number) |
| 169 | { |
| 170 | PDEBUG("executed.\n"); |
| 171 | *number = 8; |
| 172 | return ME_ERRNO_SUCCESS; |
| 173 | } |
| 174 | |
| 175 | static int me0600_ttli_query_subdevice_type(me_subdevice_t * subdevice, |
| 176 | int *type, int *subtype) |
| 177 | { |
| 178 | PDEBUG("executed.\n"); |
| 179 | *type = ME_TYPE_DI; |
| 180 | *subtype = ME_SUBTYPE_SINGLE; |
| 181 | return ME_ERRNO_SUCCESS; |
| 182 | } |
| 183 | |
| 184 | static int me0600_ttli_query_subdevice_caps(me_subdevice_t * subdevice, |
| 185 | int *caps) |
| 186 | { |
| 187 | PDEBUG("executed.\n"); |
| 188 | *caps = 0; |
| 189 | return ME_ERRNO_SUCCESS; |
| 190 | } |
| 191 | |
| 192 | me0600_ttli_subdevice_t *me0600_ttli_constructor(uint32_t reg_base) |
| 193 | { |
| 194 | me0600_ttli_subdevice_t *subdevice; |
| 195 | int err; |
| 196 | |
| 197 | PDEBUG("executed.\n"); |
| 198 | |
| 199 | /* Allocate memory for subdevice instance */ |
| 200 | subdevice = kmalloc(sizeof(me0600_ttli_subdevice_t), GFP_KERNEL); |
| 201 | |
| 202 | if (!subdevice) { |
| 203 | PERROR("Cannot get memory for subdevice instance.\n"); |
| 204 | return NULL; |
| 205 | } |
| 206 | |
| 207 | memset(subdevice, 0, sizeof(me0600_ttli_subdevice_t)); |
| 208 | |
| 209 | /* Initialize subdevice base class */ |
| 210 | err = me_subdevice_init(&subdevice->base); |
| 211 | |
| 212 | if (err) { |
| 213 | PERROR("Cannot initialize subdevice base class instance.\n"); |
| 214 | kfree(subdevice); |
| 215 | return NULL; |
| 216 | } |
| 217 | // Initialize spin locks. |
| 218 | spin_lock_init(&subdevice->subdevice_lock); |
| 219 | |
| 220 | /* Save the subdevice index */ |
| 221 | subdevice->port_reg = reg_base + ME0600_TTL_INPUT_REG; |
| 222 | |
| 223 | /* Overload base class methods. */ |
| 224 | subdevice->base.me_subdevice_io_reset_subdevice = |
| 225 | me0600_ttli_io_reset_subdevice; |
| 226 | subdevice->base.me_subdevice_io_single_config = |
| 227 | me0600_ttli_io_single_config; |
| 228 | subdevice->base.me_subdevice_io_single_read = |
| 229 | me0600_ttli_io_single_read; |
| 230 | subdevice->base.me_subdevice_query_number_channels = |
| 231 | me0600_ttli_query_number_channels; |
| 232 | subdevice->base.me_subdevice_query_subdevice_type = |
| 233 | me0600_ttli_query_subdevice_type; |
| 234 | subdevice->base.me_subdevice_query_subdevice_caps = |
| 235 | me0600_ttli_query_subdevice_caps; |
| 236 | |
| 237 | return subdevice; |
| 238 | } |