David Kiliani | 3fedd14 | 2008-11-01 00:39:12 +0100 | [diff] [blame] | 1 | /** |
| 2 | * @file me1600_device.c |
| 3 | * |
| 4 | * @brief ME-1600 device class implementation. |
| 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 | #ifndef MODULE |
| 33 | # define MODULE |
| 34 | #endif |
| 35 | |
| 36 | #include <linux/module.h> |
| 37 | |
| 38 | #include <linux/pci.h> |
| 39 | #include <linux/slab.h> |
| 40 | |
| 41 | #include "meids.h" |
| 42 | #include "meerror.h" |
| 43 | #include "mecommon.h" |
| 44 | #include "meinternal.h" |
| 45 | |
| 46 | #include "medebug.h" |
| 47 | #include "medevice.h" |
| 48 | #include "mesubdevice.h" |
| 49 | #include "me1600_device.h" |
| 50 | |
| 51 | static void me1600_set_registry(me1600_device_t * subdevice, uint32_t reg_base); |
| 52 | static void me1600_destructor(struct me_device *device); |
| 53 | |
| 54 | /** |
| 55 | * @brief Global variable. |
| 56 | * This is working queue for runing a separate atask that will be responsible for work status (start, stop, timeouts). |
| 57 | */ |
| 58 | static struct workqueue_struct *me1600_workqueue; |
| 59 | |
| 60 | me_device_t *me1600_pci_constructor(struct pci_dev *pci_device) |
| 61 | { |
| 62 | int err; |
| 63 | me1600_device_t *me1600_device; |
| 64 | me_subdevice_t *subdevice; |
| 65 | unsigned int chip_idx; |
| 66 | int i; |
| 67 | |
| 68 | PDEBUG("executed.\n"); |
| 69 | |
| 70 | // Allocate structure for device instance. |
| 71 | me1600_device = kmalloc(sizeof(me1600_device_t), GFP_KERNEL); |
| 72 | |
| 73 | if (!me1600_device) { |
| 74 | PERROR("Cannot get memory for device instance.\n"); |
| 75 | return NULL; |
| 76 | } |
| 77 | |
| 78 | memset(me1600_device, 0, sizeof(me1600_device_t)); |
| 79 | |
| 80 | // Initialize base class structure. |
| 81 | err = me_device_pci_init((me_device_t *) me1600_device, pci_device); |
| 82 | |
| 83 | if (err) { |
| 84 | kfree(me1600_device); |
| 85 | PERROR("Cannot initialize device base class.\n"); |
| 86 | return NULL; |
| 87 | } |
| 88 | // Initialize spin lock . |
| 89 | spin_lock_init(&me1600_device->config_regs_lock); |
| 90 | spin_lock_init(&me1600_device->ao_shadows_lock); |
| 91 | |
| 92 | // Get the number of analog output subdevices. |
| 93 | chip_idx = |
| 94 | me1600_versions_get_device_index(me1600_device->base.info.pci. |
| 95 | device_id); |
| 96 | |
| 97 | // Create shadow instance. |
| 98 | me1600_device->ao_regs_shadows.count = |
| 99 | me1600_versions[chip_idx].ao_chips; |
| 100 | me1600_device->ao_regs_shadows.registry = |
| 101 | kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(unsigned long), |
| 102 | GFP_KERNEL); |
| 103 | me1600_set_registry(me1600_device, |
| 104 | me1600_device->base.info.pci.reg_bases[2]); |
| 105 | me1600_device->ao_regs_shadows.shadow = |
| 106 | kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(uint16_t), |
| 107 | GFP_KERNEL); |
| 108 | me1600_device->ao_regs_shadows.mirror = |
| 109 | kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(uint16_t), |
| 110 | GFP_KERNEL); |
| 111 | |
| 112 | // Create subdevice instances. |
| 113 | for (i = 0; i < me1600_versions[chip_idx].ao_chips; i++) { |
| 114 | subdevice = |
| 115 | (me_subdevice_t *) me1600_ao_constructor(me1600_device-> |
| 116 | base.info.pci. |
| 117 | reg_bases[2], i, |
| 118 | ((me1600_versions |
| 119 | [chip_idx].curr > |
| 120 | i) ? 1 : 0), |
| 121 | &me1600_device-> |
| 122 | config_regs_lock, |
| 123 | &me1600_device-> |
| 124 | ao_shadows_lock, |
| 125 | &me1600_device-> |
| 126 | ao_regs_shadows, |
| 127 | me1600_workqueue); |
| 128 | |
| 129 | if (!subdevice) { |
| 130 | me_device_deinit((me_device_t *) me1600_device); |
| 131 | kfree(me1600_device); |
| 132 | PERROR("Cannot get memory for subdevice.\n"); |
| 133 | return NULL; |
| 134 | } |
| 135 | |
| 136 | me_slist_add_subdevice_tail(&me1600_device->base.slist, |
| 137 | subdevice); |
| 138 | } |
| 139 | |
| 140 | // Overwrite base class methods. |
| 141 | me1600_device->base.me_device_destructor = me1600_destructor; |
| 142 | |
| 143 | return (me_device_t *) me1600_device; |
| 144 | } |
| 145 | |
| 146 | static void me1600_destructor(struct me_device *device) |
| 147 | { |
| 148 | me1600_device_t *me1600_device = (me1600_device_t *) device; |
| 149 | PDEBUG("executed.\n"); |
| 150 | |
| 151 | // Destroy shadow instance. |
| 152 | kfree(me1600_device->ao_regs_shadows.registry); |
| 153 | kfree(me1600_device->ao_regs_shadows.shadow); |
| 154 | kfree(me1600_device->ao_regs_shadows.mirror); |
| 155 | |
| 156 | me_device_deinit((me_device_t *) me1600_device); |
| 157 | kfree(me1600_device); |
| 158 | } |
| 159 | |
| 160 | static void me1600_set_registry(me1600_device_t * subdevice, uint32_t reg_base) |
| 161 | { // Create shadow structure. |
| 162 | if (subdevice->ao_regs_shadows.count >= 1) { |
| 163 | subdevice->ao_regs_shadows.registry[0] = |
| 164 | (unsigned long)(reg_base + ME1600_CHANNEL_0_REG); |
| 165 | } |
| 166 | if (subdevice->ao_regs_shadows.count >= 2) { |
| 167 | subdevice->ao_regs_shadows.registry[1] = |
| 168 | (unsigned long)(reg_base + ME1600_CHANNEL_1_REG); |
| 169 | } |
| 170 | if (subdevice->ao_regs_shadows.count >= 3) { |
| 171 | subdevice->ao_regs_shadows.registry[2] = |
| 172 | (unsigned long)(reg_base + ME1600_CHANNEL_2_REG); |
| 173 | } |
| 174 | if (subdevice->ao_regs_shadows.count >= 4) { |
| 175 | subdevice->ao_regs_shadows.registry[3] = |
| 176 | (unsigned long)(reg_base + ME1600_CHANNEL_3_REG); |
| 177 | } |
| 178 | if (subdevice->ao_regs_shadows.count >= 5) { |
| 179 | subdevice->ao_regs_shadows.registry[4] = |
| 180 | (unsigned long)(reg_base + ME1600_CHANNEL_4_REG); |
| 181 | } |
| 182 | if (subdevice->ao_regs_shadows.count >= 6) { |
| 183 | subdevice->ao_regs_shadows.registry[5] = |
| 184 | (unsigned long)(reg_base + ME1600_CHANNEL_5_REG); |
| 185 | } |
| 186 | if (subdevice->ao_regs_shadows.count >= 7) { |
| 187 | subdevice->ao_regs_shadows.registry[6] = |
| 188 | (unsigned long)(reg_base + ME1600_CHANNEL_6_REG); |
| 189 | } |
| 190 | if (subdevice->ao_regs_shadows.count >= 8) { |
| 191 | subdevice->ao_regs_shadows.registry[7] = |
| 192 | (unsigned long)(reg_base + ME1600_CHANNEL_7_REG); |
| 193 | } |
| 194 | if (subdevice->ao_regs_shadows.count >= 9) { |
| 195 | subdevice->ao_regs_shadows.registry[8] = |
| 196 | (unsigned long)(reg_base + ME1600_CHANNEL_8_REG); |
| 197 | } |
| 198 | if (subdevice->ao_regs_shadows.count >= 10) { |
| 199 | subdevice->ao_regs_shadows.registry[9] = |
| 200 | (unsigned long)(reg_base + ME1600_CHANNEL_9_REG); |
| 201 | } |
| 202 | if (subdevice->ao_regs_shadows.count >= 11) { |
| 203 | subdevice->ao_regs_shadows.registry[10] = |
| 204 | (unsigned long)(reg_base + ME1600_CHANNEL_10_REG); |
| 205 | } |
| 206 | if (subdevice->ao_regs_shadows.count >= 12) { |
| 207 | subdevice->ao_regs_shadows.registry[11] = |
| 208 | (unsigned long)(reg_base + ME1600_CHANNEL_11_REG); |
| 209 | } |
| 210 | if (subdevice->ao_regs_shadows.count >= 13) { |
| 211 | subdevice->ao_regs_shadows.registry[12] = |
| 212 | (unsigned long)(reg_base + ME1600_CHANNEL_12_REG); |
| 213 | } |
| 214 | if (subdevice->ao_regs_shadows.count >= 14) { |
| 215 | subdevice->ao_regs_shadows.registry[13] = |
| 216 | (unsigned long)(reg_base + ME1600_CHANNEL_13_REG); |
| 217 | } |
| 218 | if (subdevice->ao_regs_shadows.count >= 15) { |
| 219 | subdevice->ao_regs_shadows.registry[14] = |
| 220 | (unsigned long)(reg_base + ME1600_CHANNEL_14_REG); |
| 221 | } |
| 222 | if (subdevice->ao_regs_shadows.count >= 16) { |
| 223 | subdevice->ao_regs_shadows.registry[15] = |
| 224 | (unsigned long)(reg_base + ME1600_CHANNEL_15_REG); |
| 225 | } |
| 226 | if (subdevice->ao_regs_shadows.count > 16) { |
| 227 | PERROR("More than 16 outputs! (%d)\n", |
| 228 | subdevice->ao_regs_shadows.count); |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | // Init and exit of module. |
| 233 | |
| 234 | static int __init me1600_init(void) |
| 235 | { |
| 236 | PDEBUG("executed\n."); |
| 237 | |
| 238 | me1600_workqueue = create_singlethread_workqueue("me1600"); |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | static void __exit me1600_exit(void) |
| 243 | { |
| 244 | PDEBUG("executed\n."); |
| 245 | |
| 246 | flush_workqueue(me1600_workqueue); |
| 247 | destroy_workqueue(me1600_workqueue); |
| 248 | } |
| 249 | |
| 250 | module_init(me1600_init); |
| 251 | module_exit(me1600_exit); |
| 252 | |
| 253 | // Administrative stuff for modinfo. |
| 254 | MODULE_AUTHOR |
| 255 | ("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>"); |
| 256 | MODULE_DESCRIPTION("Device Driver Module for ME-1600 Device"); |
| 257 | MODULE_SUPPORTED_DEVICE("Meilhaus ME-1600 Devices"); |
| 258 | MODULE_LICENSE("GPL"); |
| 259 | |
| 260 | // Export the constructor. |
| 261 | EXPORT_SYMBOL(me1600_pci_constructor); |