David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 1 | /** |
| 2 | * @file me4600_di.c |
| 3 | * |
| 4 | * @brief ME-4000 digital 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 "me4600_dio_reg.h" |
| 48 | #include "me4600_di.h" |
| 49 | |
| 50 | /* |
| 51 | * Defines |
| 52 | */ |
| 53 | |
| 54 | /* |
| 55 | * Functions |
| 56 | */ |
| 57 | |
| 58 | static int me4600_di_io_reset_subdevice(struct me_subdevice *subdevice, |
| 59 | struct file *filep, int flags) |
| 60 | { |
| 61 | me4600_di_subdevice_t *instance; |
| 62 | uint32_t mode; |
| 63 | |
| 64 | PDEBUG("executed.\n"); |
| 65 | |
| 66 | instance = (me4600_di_subdevice_t *) subdevice; |
| 67 | |
| 68 | if (flags) { |
| 69 | PERROR("Invalid flag specified.\n"); |
| 70 | return ME_ERRNO_INVALID_FLAGS; |
| 71 | } |
| 72 | |
| 73 | ME_SUBDEVICE_ENTER; |
| 74 | |
| 75 | spin_lock(&instance->subdevice_lock); |
| 76 | spin_lock(instance->ctrl_reg_lock); |
| 77 | mode = inl(instance->ctrl_reg); |
| 78 | mode &= ~(ME4600_DIO_CTRL_BIT_MODE_2 | ME4600_DIO_CTRL_BIT_MODE_3); //0xFFF3 |
| 79 | outl(mode, instance->ctrl_reg); |
| 80 | PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 81 | instance->ctrl_reg - instance->reg_base, mode); |
| 82 | spin_unlock(instance->ctrl_reg_lock); |
| 83 | |
| 84 | outl(0, instance->port_reg); |
| 85 | PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| 86 | instance->port_reg - instance->reg_base, 0); |
| 87 | spin_unlock(&instance->subdevice_lock); |
| 88 | |
| 89 | ME_SUBDEVICE_EXIT; |
| 90 | |
| 91 | return ME_ERRNO_SUCCESS; |
| 92 | } |
| 93 | |
| 94 | static int me4600_di_io_single_config(me_subdevice_t * subdevice, |
| 95 | struct file *filep, |
| 96 | int channel, |
| 97 | int single_config, |
| 98 | int ref, |
| 99 | int trig_chan, |
| 100 | int trig_type, int trig_edge, int flags) |
| 101 | { |
| 102 | int err = ME_ERRNO_SUCCESS; |
| 103 | me4600_di_subdevice_t *instance; |
| 104 | |
| 105 | PDEBUG("executed.\n"); |
| 106 | |
| 107 | instance = (me4600_di_subdevice_t *) subdevice; |
| 108 | |
| 109 | ME_SUBDEVICE_ENTER; |
| 110 | |
| 111 | switch (flags) { |
| 112 | case ME_IO_SINGLE_CONFIG_NO_FLAGS: |
| 113 | case ME_IO_SINGLE_CONFIG_DIO_BYTE: |
| 114 | if (channel == 0) { |
| 115 | if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) { |
| 116 | } else { |
| 117 | PERROR("Invalid port direction specified.\n"); |
| 118 | err = ME_ERRNO_INVALID_SINGLE_CONFIG; |
| 119 | } |
| 120 | } else { |
| 121 | PERROR("Invalid channel number.\n"); |
| 122 | err = ME_ERRNO_INVALID_CHANNEL; |
| 123 | } |
| 124 | break; |
| 125 | |
| 126 | default: |
| 127 | PERROR("Invalid flags specified.\n"); |
| 128 | err = ME_ERRNO_INVALID_FLAGS; |
| 129 | } |
| 130 | |
| 131 | ME_SUBDEVICE_EXIT; |
| 132 | |
| 133 | return err; |
| 134 | } |
| 135 | |
| 136 | static int me4600_di_io_single_read(me_subdevice_t * subdevice, |
| 137 | struct file *filep, |
| 138 | int channel, |
| 139 | int *value, int time_out, int flags) |
| 140 | { |
| 141 | me4600_di_subdevice_t *instance; |
| 142 | int err = ME_ERRNO_SUCCESS; |
| 143 | |
| 144 | PDEBUG("executed.\n"); |
| 145 | |
| 146 | instance = (me4600_di_subdevice_t *) subdevice; |
| 147 | |
| 148 | ME_SUBDEVICE_ENTER; |
| 149 | |
| 150 | switch (flags) { |
| 151 | case ME_IO_SINGLE_TYPE_DIO_BIT: |
| 152 | if ((channel >= 0) && (channel < 8)) { |
| 153 | *value = inl(instance->port_reg) & (0x1 << channel); |
| 154 | } else { |
| 155 | PERROR("Invalid bit number specified.\n"); |
| 156 | err = ME_ERRNO_INVALID_CHANNEL; |
| 157 | } |
| 158 | break; |
| 159 | |
| 160 | case ME_IO_SINGLE_NO_FLAGS: |
| 161 | case ME_IO_SINGLE_TYPE_DIO_BYTE: |
| 162 | if (channel == 0) { |
| 163 | *value = inl(instance->port_reg) & 0xFF; |
| 164 | } else { |
| 165 | PERROR("Invalid byte number specified.\n"); |
| 166 | err = ME_ERRNO_INVALID_CHANNEL; |
| 167 | } |
| 168 | break; |
| 169 | |
| 170 | default: |
| 171 | PERROR("Invalid flags specified.\n"); |
| 172 | err = ME_ERRNO_INVALID_FLAGS; |
| 173 | } |
| 174 | |
| 175 | ME_SUBDEVICE_EXIT; |
| 176 | |
| 177 | return err; |
| 178 | } |
| 179 | |
| 180 | static int me4600_di_query_number_channels(me_subdevice_t * subdevice, |
| 181 | int *number) |
| 182 | { |
| 183 | PDEBUG("executed.\n"); |
| 184 | *number = 8; |
| 185 | return ME_ERRNO_SUCCESS; |
| 186 | } |
| 187 | |
| 188 | static int me4600_di_query_subdevice_type(me_subdevice_t * subdevice, |
| 189 | int *type, int *subtype) |
| 190 | { |
| 191 | PDEBUG("executed.\n"); |
| 192 | *type = ME_TYPE_DI; |
| 193 | *subtype = ME_SUBTYPE_SINGLE; |
| 194 | return ME_ERRNO_SUCCESS; |
| 195 | } |
| 196 | |
| 197 | static int me4600_di_query_subdevice_caps(me_subdevice_t * subdevice, int *caps) |
| 198 | { |
| 199 | PDEBUG("executed.\n"); |
| 200 | *caps = 0; |
| 201 | return ME_ERRNO_SUCCESS; |
| 202 | } |
| 203 | |
| 204 | me4600_di_subdevice_t *me4600_di_constructor(uint32_t reg_base, |
| 205 | spinlock_t * ctrl_reg_lock) |
| 206 | { |
| 207 | me4600_di_subdevice_t *subdevice; |
| 208 | int err; |
| 209 | |
| 210 | PDEBUG("executed.\n"); |
| 211 | |
| 212 | /* Allocate memory for subdevice instance */ |
| 213 | subdevice = kmalloc(sizeof(me4600_di_subdevice_t), GFP_KERNEL); |
| 214 | |
| 215 | if (!subdevice) { |
| 216 | PERROR("Cannot get memory for subdevice instance.\n"); |
| 217 | return NULL; |
| 218 | } |
| 219 | |
| 220 | memset(subdevice, 0, sizeof(me4600_di_subdevice_t)); |
| 221 | |
| 222 | /* Initialize subdevice base class */ |
| 223 | err = me_subdevice_init(&subdevice->base); |
| 224 | |
| 225 | if (err) { |
| 226 | PERROR("Cannot initialize subdevice base class instance.\n"); |
| 227 | kfree(subdevice); |
| 228 | return NULL; |
| 229 | } |
| 230 | // Initialize spin locks. |
| 231 | spin_lock_init(&subdevice->subdevice_lock); |
| 232 | |
| 233 | subdevice->ctrl_reg_lock = ctrl_reg_lock; |
| 234 | |
| 235 | /* Save the subdevice index */ |
| 236 | subdevice->port_reg = reg_base + ME4600_DIO_PORT_1_REG; |
| 237 | subdevice->ctrl_reg = reg_base + ME4600_DIO_CTRL_REG; |
| 238 | #ifdef MEDEBUG_DEBUG_REG |
| 239 | subdevice->reg_base = reg_base; |
| 240 | #endif |
| 241 | |
| 242 | /* Overload base class methods. */ |
| 243 | subdevice->base.me_subdevice_io_reset_subdevice = |
| 244 | me4600_di_io_reset_subdevice; |
| 245 | subdevice->base.me_subdevice_io_single_config = |
| 246 | me4600_di_io_single_config; |
| 247 | subdevice->base.me_subdevice_io_single_read = me4600_di_io_single_read; |
| 248 | subdevice->base.me_subdevice_query_number_channels = |
| 249 | me4600_di_query_number_channels; |
| 250 | subdevice->base.me_subdevice_query_subdevice_type = |
| 251 | me4600_di_query_subdevice_type; |
| 252 | subdevice->base.me_subdevice_query_subdevice_caps = |
| 253 | me4600_di_query_subdevice_caps; |
| 254 | |
| 255 | return subdevice; |
| 256 | } |