David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 1 | /** |
| 2 | * @file me0900_di.c |
| 3 | * |
| 4 | * @brief ME-9x digital input subdevice instance. |
| 5 | * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| 6 | * @author Guenter Gebhardt |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| 11 | * |
| 12 | * This file is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | */ |
| 26 | |
| 27 | #ifndef __KERNEL__ |
| 28 | # define __KERNEL__ |
| 29 | #endif |
| 30 | |
| 31 | /* |
| 32 | * Includes |
| 33 | */ |
| 34 | #include <linux/module.h> |
| 35 | |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/spinlock.h> |
Alexander Beregalov | 451084d | 2009-03-16 19:45:13 +0300 | [diff] [blame] | 38 | #include <linux/io.h> |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 39 | #include <linux/types.h> |
| 40 | #include <linux/interrupt.h> |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 41 | |
| 42 | #include "medefines.h" |
| 43 | #include "meinternal.h" |
| 44 | #include "meerror.h" |
| 45 | |
| 46 | #include "meids.h" |
| 47 | #include "medebug.h" |
| 48 | #include "meplx_reg.h" |
| 49 | #include "me0900_reg.h" |
| 50 | #include "me0900_di.h" |
| 51 | |
| 52 | /* |
| 53 | * Defines |
| 54 | */ |
| 55 | |
| 56 | /* |
| 57 | * Functions |
| 58 | */ |
| 59 | |
| 60 | static int me0900_di_io_reset_subdevice(struct me_subdevice *subdevice, |
| 61 | struct file *filep, int flags) |
| 62 | { |
| 63 | PDEBUG("executed.\n"); |
| 64 | |
| 65 | if (flags) { |
| 66 | PERROR("Invalid flag specified.\n"); |
| 67 | return ME_ERRNO_INVALID_FLAGS; |
| 68 | } |
| 69 | |
| 70 | return ME_ERRNO_SUCCESS; |
| 71 | } |
| 72 | |
Alexander Beregalov | 451084d | 2009-03-16 19:45:13 +0300 | [diff] [blame] | 73 | static int me0900_di_io_single_config(me_subdevice_t *subdevice, |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 74 | struct file *filep, |
| 75 | int channel, |
| 76 | int single_config, |
| 77 | int ref, |
| 78 | int trig_chan, |
| 79 | int trig_type, int trig_edge, int flags) |
| 80 | { |
| 81 | me0900_di_subdevice_t *instance; |
| 82 | int err = ME_ERRNO_SUCCESS; |
| 83 | |
| 84 | PDEBUG("executed.\n"); |
| 85 | |
| 86 | instance = (me0900_di_subdevice_t *) subdevice; |
| 87 | |
| 88 | ME_SUBDEVICE_ENTER; |
| 89 | |
| 90 | spin_lock(&instance->subdevice_lock); |
| 91 | switch (flags) { |
| 92 | case ME_IO_SINGLE_CONFIG_NO_FLAGS: |
| 93 | case ME_IO_SINGLE_TYPE_DIO_BYTE: |
| 94 | if (channel == 0) { |
| 95 | if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) { |
| 96 | } else { |
| 97 | PERROR("Invalid byte direction specified.\n"); |
| 98 | err = ME_ERRNO_INVALID_SINGLE_CONFIG; |
| 99 | } |
| 100 | } else { |
| 101 | PERROR("Invalid byte number specified.\n"); |
| 102 | err = ME_ERRNO_INVALID_CHANNEL; |
| 103 | } |
| 104 | break; |
| 105 | |
| 106 | default: |
| 107 | PERROR("Invalid flags specified.\n"); |
| 108 | err = ME_ERRNO_INVALID_FLAGS; |
| 109 | } |
| 110 | spin_unlock(&instance->subdevice_lock); |
| 111 | |
| 112 | ME_SUBDEVICE_EXIT; |
| 113 | |
| 114 | return err; |
| 115 | } |
| 116 | |
Alexander Beregalov | 451084d | 2009-03-16 19:45:13 +0300 | [diff] [blame] | 117 | static int me0900_di_io_single_read(me_subdevice_t *subdevice, |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 118 | struct file *filep, |
| 119 | int channel, |
| 120 | int *value, int time_out, int flags) |
| 121 | { |
| 122 | me0900_di_subdevice_t *instance; |
| 123 | int err = ME_ERRNO_SUCCESS; |
| 124 | |
| 125 | PDEBUG("executed.\n"); |
| 126 | |
| 127 | instance = (me0900_di_subdevice_t *) subdevice; |
| 128 | |
| 129 | ME_SUBDEVICE_ENTER; |
| 130 | |
| 131 | spin_lock(&instance->subdevice_lock); |
| 132 | switch (flags) { |
| 133 | case ME_IO_SINGLE_TYPE_DIO_BIT: |
| 134 | if ((channel >= 0) && (channel < 8)) { |
| 135 | *value = (~inb(instance->port_reg)) & (0x1 << channel); |
| 136 | } else { |
| 137 | PERROR("Invalid bit number specified.\n"); |
| 138 | err = ME_ERRNO_INVALID_CHANNEL; |
| 139 | } |
| 140 | break; |
| 141 | |
| 142 | case ME_IO_SINGLE_NO_FLAGS: |
| 143 | case ME_IO_SINGLE_TYPE_DIO_BYTE: |
| 144 | if (channel == 0) { |
| 145 | *value = ~inb(instance->port_reg); |
| 146 | } else { |
| 147 | PERROR("Invalid byte number specified.\n"); |
| 148 | err = ME_ERRNO_INVALID_CHANNEL; |
| 149 | } |
| 150 | break; |
| 151 | |
| 152 | default: |
| 153 | PERROR("Invalid flags specified.\n"); |
| 154 | err = ME_ERRNO_INVALID_FLAGS; |
| 155 | } |
| 156 | spin_unlock(&instance->subdevice_lock); |
| 157 | |
| 158 | ME_SUBDEVICE_EXIT; |
| 159 | |
| 160 | return err; |
| 161 | } |
| 162 | |
Alexander Beregalov | 451084d | 2009-03-16 19:45:13 +0300 | [diff] [blame] | 163 | static int me0900_di_query_number_channels(me_subdevice_t *subdevice, |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 164 | int *number) |
| 165 | { |
| 166 | PDEBUG("executed.\n"); |
| 167 | *number = 8; |
| 168 | return ME_ERRNO_SUCCESS; |
| 169 | } |
| 170 | |
Alexander Beregalov | 451084d | 2009-03-16 19:45:13 +0300 | [diff] [blame] | 171 | static int me0900_di_query_subdevice_type(me_subdevice_t *subdevice, |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 172 | int *type, int *subtype) |
| 173 | { |
| 174 | PDEBUG("executed.\n"); |
| 175 | *type = ME_TYPE_DI; |
| 176 | *subtype = ME_SUBTYPE_SINGLE; |
| 177 | return ME_ERRNO_SUCCESS; |
| 178 | } |
| 179 | |
Alexander Beregalov | 451084d | 2009-03-16 19:45:13 +0300 | [diff] [blame] | 180 | static int me0900_di_query_subdevice_caps(me_subdevice_t *subdevice, int *caps) |
David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 181 | { |
| 182 | PDEBUG("executed.\n"); |
| 183 | *caps = 0; |
| 184 | return ME_ERRNO_SUCCESS; |
| 185 | } |
| 186 | |
| 187 | me0900_di_subdevice_t *me0900_di_constructor(uint32_t reg_base, |
| 188 | unsigned int di_idx) |
| 189 | { |
| 190 | me0900_di_subdevice_t *subdevice; |
| 191 | int err; |
| 192 | |
| 193 | PDEBUG("executed.\n"); |
| 194 | |
| 195 | /* Allocate memory for subdevice instance */ |
| 196 | subdevice = kmalloc(sizeof(me0900_di_subdevice_t), GFP_KERNEL); |
| 197 | |
| 198 | if (!subdevice) { |
| 199 | PERROR("Cannot get memory for subdevice instance.\n"); |
| 200 | return NULL; |
| 201 | } |
| 202 | |
| 203 | memset(subdevice, 0, sizeof(me0900_di_subdevice_t)); |
| 204 | |
| 205 | /* Initialize subdevice base class */ |
| 206 | err = me_subdevice_init(&subdevice->base); |
| 207 | |
| 208 | if (err) { |
| 209 | PERROR("Cannot initialize subdevice base class instance.\n"); |
| 210 | kfree(subdevice); |
| 211 | return NULL; |
| 212 | } |
| 213 | // Initialize spin locks. |
| 214 | spin_lock_init(&subdevice->subdevice_lock); |
| 215 | |
| 216 | /* Save the subdevice index. */ |
| 217 | subdevice->di_idx = di_idx; |
| 218 | |
| 219 | /* Initialize registers */ |
| 220 | if (di_idx == 0) { |
| 221 | subdevice->ctrl_reg = reg_base + ME0900_CTRL_REG; |
| 222 | subdevice->port_reg = reg_base + ME0900_PORT_A_REG; |
| 223 | } else { |
| 224 | subdevice->ctrl_reg = reg_base + ME0900_CTRL_REG; |
| 225 | subdevice->port_reg = reg_base + ME0900_PORT_B_REG; |
| 226 | } |
| 227 | #ifdef MEDEBUG_DEBUG_REG |
| 228 | subdevice->reg_base = reg_base; |
| 229 | #endif |
| 230 | |
| 231 | /* Overload base class methods. */ |
| 232 | subdevice->base.me_subdevice_io_reset_subdevice = |
| 233 | me0900_di_io_reset_subdevice; |
| 234 | subdevice->base.me_subdevice_io_single_config = |
| 235 | me0900_di_io_single_config; |
| 236 | subdevice->base.me_subdevice_io_single_read = me0900_di_io_single_read; |
| 237 | subdevice->base.me_subdevice_query_number_channels = |
| 238 | me0900_di_query_number_channels; |
| 239 | subdevice->base.me_subdevice_query_subdevice_type = |
| 240 | me0900_di_query_subdevice_type; |
| 241 | subdevice->base.me_subdevice_query_subdevice_caps = |
| 242 | me0900_di_query_subdevice_caps; |
| 243 | |
| 244 | return subdevice; |
| 245 | } |