David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 1 | /* |
| 2 | module/drivers.c |
| 3 | functions for manipulating drivers |
| 4 | |
| 5 | COMEDI - Linux Control and Measurement Device Interface |
| 6 | Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org> |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | |
| 22 | */ |
| 23 | |
| 24 | #define _GNU_SOURCE |
| 25 | |
| 26 | #define __NO_VERSION__ |
| 27 | #include "comedi_fops.h" |
| 28 | #include <linux/device.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/pci.h> |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 31 | #include <linux/usb.h> |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 32 | #include <linux/errno.h> |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/sched.h> |
| 35 | #include <linux/fcntl.h> |
| 36 | #include <linux/delay.h> |
| 37 | #include <linux/ioport.h> |
| 38 | #include <linux/mm.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include "comedidev.h" |
| 41 | #include "wrapper.h" |
| 42 | #include <linux/highmem.h> /* for SuSE brokenness */ |
| 43 | #include <linux/vmalloc.h> |
| 44 | #include <linux/cdev.h> |
| 45 | #include <linux/dma-mapping.h> |
| 46 | |
| 47 | #include <asm/io.h> |
| 48 | #include <asm/system.h> |
| 49 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 50 | static int postconfig(struct comedi_device *dev); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 51 | static int insn_rw_emulate_bits(struct comedi_device *dev, struct comedi_subdevice *s, |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 52 | struct comedi_insn *insn, unsigned int *data); |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 53 | static void *comedi_recognize(struct comedi_driver * driv, const char *name); |
| 54 | static void comedi_report_boards(struct comedi_driver *driv); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 55 | static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s); |
| 56 | int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 57 | unsigned long new_size); |
| 58 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 59 | struct comedi_driver *comedi_drivers; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 60 | |
| 61 | int comedi_modprobe(int minor) |
| 62 | { |
| 63 | return -EINVAL; |
| 64 | } |
| 65 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 66 | static void cleanup_device(struct comedi_device *dev) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 67 | { |
| 68 | int i; |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 69 | struct comedi_subdevice *s; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 70 | |
| 71 | if (dev->subdevices) { |
| 72 | for (i = 0; i < dev->n_subdevices; i++) { |
| 73 | s = dev->subdevices + i; |
| 74 | comedi_free_subdevice_minor(s); |
| 75 | if (s->async) { |
| 76 | comedi_buf_alloc(dev, s, 0); |
| 77 | kfree(s->async); |
| 78 | } |
| 79 | } |
| 80 | kfree(dev->subdevices); |
| 81 | dev->subdevices = NULL; |
| 82 | dev->n_subdevices = 0; |
| 83 | } |
Bill Pemberton | dedd132 | 2009-03-16 22:04:18 -0400 | [diff] [blame] | 84 | kfree(dev->private); |
| 85 | dev->private = NULL; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 86 | dev->driver = 0; |
| 87 | dev->board_name = NULL; |
| 88 | dev->board_ptr = NULL; |
| 89 | dev->iobase = 0; |
| 90 | dev->irq = 0; |
| 91 | dev->read_subdev = NULL; |
| 92 | dev->write_subdev = NULL; |
| 93 | dev->open = NULL; |
| 94 | dev->close = NULL; |
| 95 | comedi_set_hw_dev(dev, NULL); |
| 96 | } |
| 97 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 98 | static void __comedi_device_detach(struct comedi_device *dev) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 99 | { |
| 100 | dev->attached = 0; |
| 101 | if (dev->driver) { |
| 102 | dev->driver->detach(dev); |
| 103 | } else { |
| 104 | printk("BUG: dev->driver=NULL in comedi_device_detach()\n"); |
| 105 | } |
| 106 | cleanup_device(dev); |
| 107 | } |
| 108 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 109 | void comedi_device_detach(struct comedi_device *dev) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 110 | { |
| 111 | if (!dev->attached) |
| 112 | return; |
| 113 | __comedi_device_detach(dev); |
| 114 | } |
| 115 | |
Bill Pemberton | 0707bb0 | 2009-03-16 22:06:20 -0400 | [diff] [blame] | 116 | int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 117 | { |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 118 | struct comedi_driver *driv; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 119 | int ret; |
| 120 | |
| 121 | if (dev->attached) |
| 122 | return -EBUSY; |
| 123 | |
| 124 | for (driv = comedi_drivers; driv; driv = driv->next) { |
| 125 | if (!try_module_get(driv->module)) { |
| 126 | printk("comedi: failed to increment module count, skipping\n"); |
| 127 | continue; |
| 128 | } |
| 129 | if (driv->num_names) { |
| 130 | dev->board_ptr = comedi_recognize(driv, it->board_name); |
| 131 | if (dev->board_ptr == NULL) { |
| 132 | module_put(driv->module); |
| 133 | continue; |
| 134 | } |
| 135 | } else { |
| 136 | if (strcmp(driv->driver_name, it->board_name)) { |
| 137 | module_put(driv->module); |
| 138 | continue; |
| 139 | } |
| 140 | } |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 141 | /* initialize dev->driver here so comedi_error() can be called from attach */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 142 | dev->driver = driv; |
| 143 | ret = driv->attach(dev, it); |
| 144 | if (ret < 0) { |
| 145 | module_put(dev->driver->module); |
| 146 | __comedi_device_detach(dev); |
| 147 | return ret; |
| 148 | } |
| 149 | goto attached; |
| 150 | } |
| 151 | |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 152 | /* recognize has failed if we get here */ |
| 153 | /* report valid board names before returning error */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 154 | for (driv = comedi_drivers; driv; driv = driv->next) { |
| 155 | if (!try_module_get(driv->module)) { |
| 156 | printk("comedi: failed to increment module count\n"); |
| 157 | continue; |
| 158 | } |
| 159 | comedi_report_boards(driv); |
| 160 | module_put(driv->module); |
| 161 | } |
| 162 | return -EIO; |
| 163 | |
| 164 | attached: |
| 165 | /* do a little post-config cleanup */ |
| 166 | ret = postconfig(dev); |
| 167 | module_put(dev->driver->module); |
| 168 | if (ret < 0) { |
| 169 | __comedi_device_detach(dev); |
| 170 | return ret; |
| 171 | } |
| 172 | |
| 173 | if (!dev->board_name) { |
| 174 | printk("BUG: dev->board_name=<%p>\n", dev->board_name); |
| 175 | dev->board_name = "BUG"; |
| 176 | } |
| 177 | smp_wmb(); |
| 178 | dev->attached = 1; |
| 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 183 | int comedi_driver_register(struct comedi_driver *driver) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 184 | { |
| 185 | driver->next = comedi_drivers; |
| 186 | comedi_drivers = driver; |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 191 | int comedi_driver_unregister(struct comedi_driver *driver) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 192 | { |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 193 | struct comedi_driver *prev; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 194 | int i; |
| 195 | |
| 196 | /* check for devices using this driver */ |
| 197 | for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) { |
| 198 | struct comedi_device_file_info *dev_file_info = comedi_get_device_file_info(i); |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 199 | struct comedi_device *dev; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 200 | |
| 201 | if(dev_file_info == NULL) continue; |
| 202 | dev = dev_file_info->device; |
| 203 | |
| 204 | mutex_lock(&dev->mutex); |
| 205 | if (dev->attached && dev->driver == driver) { |
| 206 | if (dev->use_count) |
| 207 | printk("BUG! detaching device with use_count=%d\n", dev->use_count); |
| 208 | comedi_device_detach(dev); |
| 209 | } |
| 210 | mutex_unlock(&dev->mutex); |
| 211 | } |
| 212 | |
| 213 | if (comedi_drivers == driver) { |
| 214 | comedi_drivers = driver->next; |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | for (prev = comedi_drivers; prev->next; prev = prev->next) { |
| 219 | if (prev->next == driver) { |
| 220 | prev->next = driver->next; |
| 221 | return 0; |
| 222 | } |
| 223 | } |
| 224 | return -EINVAL; |
| 225 | } |
| 226 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 227 | static int postconfig(struct comedi_device *dev) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 228 | { |
| 229 | int i; |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 230 | struct comedi_subdevice *s; |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 231 | struct comedi_async *async = NULL; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 232 | int ret; |
| 233 | |
| 234 | for (i = 0; i < dev->n_subdevices; i++) { |
| 235 | s = dev->subdevices + i; |
| 236 | |
| 237 | if (s->type == COMEDI_SUBD_UNUSED) |
| 238 | continue; |
| 239 | |
| 240 | if (s->len_chanlist == 0) |
| 241 | s->len_chanlist = 1; |
| 242 | |
| 243 | if (s->do_cmd) { |
| 244 | BUG_ON((s->subdev_flags & (SDF_CMD_READ | |
| 245 | SDF_CMD_WRITE)) == 0); |
| 246 | BUG_ON(!s->do_cmdtest); |
| 247 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 248 | async = kzalloc(sizeof(struct comedi_async), GFP_KERNEL); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 249 | if (async == NULL) { |
| 250 | printk("failed to allocate async struct\n"); |
| 251 | return -ENOMEM; |
| 252 | } |
| 253 | init_waitqueue_head(&async->wait_head); |
| 254 | async->subdevice = s; |
| 255 | s->async = async; |
| 256 | |
| 257 | #define DEFAULT_BUF_MAXSIZE (64*1024) |
| 258 | #define DEFAULT_BUF_SIZE (64*1024) |
| 259 | |
| 260 | async->max_bufsize = DEFAULT_BUF_MAXSIZE; |
| 261 | |
| 262 | async->prealloc_buf = NULL; |
| 263 | async->prealloc_bufsz = 0; |
| 264 | if (comedi_buf_alloc(dev, s, DEFAULT_BUF_SIZE) < 0) { |
| 265 | printk("Buffer allocation failed\n"); |
| 266 | return -ENOMEM; |
| 267 | } |
| 268 | if (s->buf_change) { |
| 269 | ret = s->buf_change(dev, s, DEFAULT_BUF_SIZE); |
| 270 | if (ret < 0) |
| 271 | return ret; |
| 272 | } |
| 273 | comedi_alloc_subdevice_minor(dev, s); |
| 274 | } |
| 275 | |
| 276 | if (!s->range_table && !s->range_table_list) |
| 277 | s->range_table = &range_unknown; |
| 278 | |
| 279 | if (!s->insn_read && s->insn_bits) |
| 280 | s->insn_read = insn_rw_emulate_bits; |
| 281 | if (!s->insn_write && s->insn_bits) |
| 282 | s->insn_write = insn_rw_emulate_bits; |
| 283 | |
| 284 | if (!s->insn_read) |
| 285 | s->insn_read = insn_inval; |
| 286 | if (!s->insn_write) |
| 287 | s->insn_write = insn_inval; |
| 288 | if (!s->insn_bits) |
| 289 | s->insn_bits = insn_inval; |
| 290 | if (!s->insn_config) |
| 291 | s->insn_config = insn_inval; |
| 292 | |
| 293 | if (!s->poll) |
| 294 | s->poll = poll_invalid; |
| 295 | } |
| 296 | |
| 297 | return 0; |
| 298 | } |
| 299 | |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 300 | /* generic recognize function for drivers that register their supported board names */ |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 301 | void *comedi_recognize(struct comedi_driver * driv, const char *name) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 302 | { |
| 303 | unsigned i; |
| 304 | const char *const *name_ptr = driv->board_name; |
| 305 | for (i = 0; i < driv->num_names; i++) { |
| 306 | if (strcmp(*name_ptr, name) == 0) |
| 307 | return (void *)name_ptr; |
| 308 | name_ptr = |
| 309 | (const char *const *)((const char *)name_ptr + |
| 310 | driv->offset); |
| 311 | } |
| 312 | |
| 313 | return NULL; |
| 314 | } |
| 315 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 316 | void comedi_report_boards(struct comedi_driver *driv) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 317 | { |
| 318 | unsigned int i; |
| 319 | const char *const *name_ptr; |
| 320 | |
| 321 | printk("comedi: valid board names for %s driver are:\n", |
| 322 | driv->driver_name); |
| 323 | |
| 324 | name_ptr = driv->board_name; |
| 325 | for (i = 0; i < driv->num_names; i++) { |
| 326 | printk(" %s\n", *name_ptr); |
| 327 | name_ptr = (const char **)((char *)name_ptr + driv->offset); |
| 328 | } |
| 329 | |
| 330 | if (driv->num_names == 0) |
| 331 | printk(" %s\n", driv->driver_name); |
| 332 | } |
| 333 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 334 | static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 335 | { |
| 336 | return -EINVAL; |
| 337 | } |
| 338 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 339 | int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s, |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 340 | struct comedi_insn *insn, unsigned int *data) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 341 | { |
| 342 | return -EINVAL; |
| 343 | } |
| 344 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 345 | static int insn_rw_emulate_bits(struct comedi_device *dev, struct comedi_subdevice *s, |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 346 | struct comedi_insn *insn, unsigned int *data) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 347 | { |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 348 | struct comedi_insn new_insn; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 349 | int ret; |
| 350 | static const unsigned channels_per_bitfield = 32; |
| 351 | |
| 352 | unsigned chan = CR_CHAN(insn->chanspec); |
| 353 | const unsigned base_bitfield_channel = |
| 354 | (chan < channels_per_bitfield) ? 0 : chan; |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 355 | unsigned int new_data[2]; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 356 | memset(new_data, 0, sizeof(new_data)); |
| 357 | memset(&new_insn, 0, sizeof(new_insn)); |
| 358 | new_insn.insn = INSN_BITS; |
| 359 | new_insn.chanspec = base_bitfield_channel; |
| 360 | new_insn.n = 2; |
| 361 | new_insn.data = new_data; |
| 362 | new_insn.subdev = insn->subdev; |
| 363 | |
| 364 | if (insn->insn == INSN_WRITE) { |
| 365 | if (!(s->subdev_flags & SDF_WRITABLE)) |
| 366 | return -EINVAL; |
| 367 | new_data[0] = 1 << (chan - base_bitfield_channel); /* mask */ |
| 368 | new_data[1] = data[0] ? (1 << (chan - base_bitfield_channel)) : 0; /* bits */ |
| 369 | } |
| 370 | |
| 371 | ret = s->insn_bits(dev, s, &new_insn, new_data); |
| 372 | if (ret < 0) |
| 373 | return ret; |
| 374 | |
| 375 | if (insn->insn == INSN_READ) { |
| 376 | data[0] = (new_data[1] >> (chan - base_bitfield_channel)) & 1; |
| 377 | } |
| 378 | |
| 379 | return 1; |
| 380 | } |
| 381 | |
Bill Pemberton | e473e91 | 2009-03-16 22:03:29 -0400 | [diff] [blame] | 382 | static inline unsigned long uvirt_to_kva(pgd_t *pgd, unsigned long adr) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 383 | { |
| 384 | unsigned long ret = 0UL; |
| 385 | pmd_t *pmd; |
| 386 | pte_t *ptep, pte; |
| 387 | pud_t *pud; |
| 388 | |
| 389 | if (!pgd_none(*pgd)) { |
| 390 | pud = pud_offset(pgd, adr); |
| 391 | pmd = pmd_offset(pud, adr); |
| 392 | if (!pmd_none(*pmd)) { |
| 393 | ptep = pte_offset_kernel(pmd, adr); |
| 394 | pte = *ptep; |
| 395 | if (pte_present(pte)) { |
| 396 | ret = (unsigned long) |
| 397 | page_address(pte_page(pte)); |
| 398 | ret |= (adr & (PAGE_SIZE - 1)); |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | return ret; |
| 403 | } |
| 404 | |
| 405 | static inline unsigned long kvirt_to_kva(unsigned long adr) |
| 406 | { |
| 407 | unsigned long va, kva; |
| 408 | |
| 409 | va = adr; |
| 410 | kva = uvirt_to_kva(pgd_offset_k(va), va); |
| 411 | |
| 412 | return kva; |
| 413 | } |
| 414 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 415 | int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 416 | unsigned long new_size) |
| 417 | { |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 418 | struct comedi_async *async = s->async; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 419 | |
| 420 | /* Round up new_size to multiple of PAGE_SIZE */ |
| 421 | new_size = (new_size + PAGE_SIZE - 1) & PAGE_MASK; |
| 422 | |
| 423 | /* if no change is required, do nothing */ |
| 424 | if (async->prealloc_buf && async->prealloc_bufsz == new_size) { |
| 425 | return 0; |
| 426 | } |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 427 | /* deallocate old buffer */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 428 | if (async->prealloc_buf) { |
| 429 | vunmap(async->prealloc_buf); |
| 430 | async->prealloc_buf = NULL; |
| 431 | async->prealloc_bufsz = 0; |
| 432 | } |
| 433 | if (async->buf_page_list) { |
| 434 | unsigned i; |
| 435 | for (i = 0; i < async->n_buf_pages; ++i) { |
| 436 | if (async->buf_page_list[i].virt_addr) { |
| 437 | mem_map_unreserve(virt_to_page(async-> |
| 438 | buf_page_list[i].virt_addr)); |
| 439 | if (s->async_dma_dir != DMA_NONE) { |
| 440 | dma_free_coherent(dev->hw_dev, |
| 441 | PAGE_SIZE, |
| 442 | async->buf_page_list[i]. |
| 443 | virt_addr, |
| 444 | async->buf_page_list[i]. |
| 445 | dma_addr); |
| 446 | } else { |
| 447 | free_page((unsigned long)async-> |
| 448 | buf_page_list[i].virt_addr); |
| 449 | } |
| 450 | } |
| 451 | } |
| 452 | vfree(async->buf_page_list); |
| 453 | async->buf_page_list = NULL; |
| 454 | async->n_buf_pages = 0; |
| 455 | } |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 456 | /* allocate new buffer */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 457 | if (new_size) { |
| 458 | unsigned i = 0; |
| 459 | unsigned n_pages = new_size >> PAGE_SHIFT; |
| 460 | struct page **pages = NULL; |
| 461 | |
| 462 | async->buf_page_list = |
| 463 | vmalloc(sizeof(struct comedi_buf_page) * n_pages); |
| 464 | if (async->buf_page_list) { |
| 465 | memset(async->buf_page_list, 0, |
| 466 | sizeof(struct comedi_buf_page) * n_pages); |
| 467 | pages = vmalloc(sizeof(struct page *) * n_pages); |
| 468 | } |
| 469 | if (pages) { |
| 470 | for (i = 0; i < n_pages; i++) { |
| 471 | if (s->async_dma_dir != DMA_NONE) { |
| 472 | async->buf_page_list[i].virt_addr = |
| 473 | dma_alloc_coherent(dev->hw_dev, |
| 474 | PAGE_SIZE, |
| 475 | &async->buf_page_list[i]. |
| 476 | dma_addr, |
| 477 | GFP_KERNEL | __GFP_COMP); |
| 478 | } else { |
| 479 | async->buf_page_list[i].virt_addr = |
| 480 | (void *) |
| 481 | get_zeroed_page(GFP_KERNEL); |
| 482 | } |
| 483 | if (async->buf_page_list[i].virt_addr == NULL) { |
| 484 | break; |
| 485 | } |
| 486 | mem_map_reserve(virt_to_page(async-> |
| 487 | buf_page_list[i].virt_addr)); |
| 488 | pages[i] = |
| 489 | virt_to_page(async->buf_page_list[i]. |
| 490 | virt_addr); |
| 491 | } |
| 492 | } |
| 493 | if (i == n_pages) { |
| 494 | async->prealloc_buf = |
| 495 | vmap(pages, n_pages, VM_MAP, |
| 496 | PAGE_KERNEL_NOCACHE); |
| 497 | } |
| 498 | if (pages) { |
| 499 | vfree(pages); |
| 500 | } |
| 501 | if (async->prealloc_buf == NULL) { |
| 502 | /* Some allocation failed above. */ |
| 503 | if (async->buf_page_list) { |
| 504 | for (i = 0; i < n_pages; i++) { |
| 505 | if (async->buf_page_list[i].virt_addr == |
| 506 | NULL) { |
| 507 | break; |
| 508 | } |
| 509 | mem_map_unreserve(virt_to_page(async-> |
| 510 | buf_page_list[i]. |
| 511 | virt_addr)); |
| 512 | if (s->async_dma_dir != DMA_NONE) { |
| 513 | dma_free_coherent(dev->hw_dev, |
| 514 | PAGE_SIZE, |
| 515 | async->buf_page_list[i]. |
| 516 | virt_addr, |
| 517 | async->buf_page_list[i]. |
| 518 | dma_addr); |
| 519 | } else { |
| 520 | free_page((unsigned long)async-> |
| 521 | buf_page_list[i]. |
| 522 | virt_addr); |
| 523 | } |
| 524 | } |
| 525 | vfree(async->buf_page_list); |
| 526 | async->buf_page_list = NULL; |
| 527 | } |
| 528 | return -ENOMEM; |
| 529 | } |
| 530 | async->n_buf_pages = n_pages; |
| 531 | } |
| 532 | async->prealloc_bufsz = new_size; |
| 533 | |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | /* munging is applied to data by core as it passes between user |
| 538 | * and kernel space */ |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 539 | unsigned int comedi_buf_munge(struct comedi_async *async, unsigned int num_bytes) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 540 | { |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 541 | struct comedi_subdevice *s = async->subdevice; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 542 | unsigned int count = 0; |
| 543 | const unsigned num_sample_bytes = bytes_per_sample(s); |
| 544 | |
| 545 | if (s->munge == NULL || (async->cmd.flags & CMDF_RAWDATA)) { |
| 546 | async->munge_count += num_bytes; |
Stoyan Gaydarov | 2961f24 | 2009-03-10 00:10:27 -0500 | [diff] [blame^] | 547 | BUG_ON((int)(async->munge_count - async->buf_write_count) > 0); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 548 | return num_bytes; |
| 549 | } |
| 550 | /* don't munge partial samples */ |
| 551 | num_bytes -= num_bytes % num_sample_bytes; |
| 552 | while (count < num_bytes) { |
| 553 | int block_size; |
| 554 | |
| 555 | block_size = num_bytes - count; |
| 556 | if (block_size < 0) { |
| 557 | rt_printk("%s: %s: bug! block_size is negative\n", |
Harvey Harrison | d599edc | 2009-01-07 14:31:57 -0800 | [diff] [blame] | 558 | __FILE__, __func__); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 559 | break; |
| 560 | } |
| 561 | if ((int)(async->munge_ptr + block_size - |
| 562 | async->prealloc_bufsz) > 0) |
| 563 | block_size = async->prealloc_bufsz - async->munge_ptr; |
| 564 | |
| 565 | s->munge(s->device, s, async->prealloc_buf + async->munge_ptr, |
| 566 | block_size, async->munge_chan); |
| 567 | |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 568 | smp_wmb(); /* barrier insures data is munged in buffer before munge_count is incremented */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 569 | |
| 570 | async->munge_chan += block_size / num_sample_bytes; |
| 571 | async->munge_chan %= async->cmd.chanlist_len; |
| 572 | async->munge_count += block_size; |
| 573 | async->munge_ptr += block_size; |
| 574 | async->munge_ptr %= async->prealloc_bufsz; |
| 575 | count += block_size; |
| 576 | } |
Stoyan Gaydarov | 2961f24 | 2009-03-10 00:10:27 -0500 | [diff] [blame^] | 577 | BUG_ON((int)(async->munge_count - async->buf_write_count) > 0); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 578 | return count; |
| 579 | } |
| 580 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 581 | unsigned int comedi_buf_write_n_available(struct comedi_async *async) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 582 | { |
| 583 | unsigned int free_end; |
| 584 | unsigned int nbytes; |
| 585 | |
| 586 | if (async == NULL) |
| 587 | return 0; |
| 588 | |
| 589 | free_end = async->buf_read_count + async->prealloc_bufsz; |
| 590 | nbytes = free_end - async->buf_write_alloc_count; |
| 591 | nbytes -= nbytes % bytes_per_sample(async->subdevice); |
| 592 | /* barrier insures the read of buf_read_count in this |
| 593 | query occurs before any following writes to the buffer which |
| 594 | might be based on the return value from this query. |
| 595 | */ |
| 596 | smp_mb(); |
| 597 | return nbytes; |
| 598 | } |
| 599 | |
| 600 | /* allocates chunk for the writer from free buffer space */ |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 601 | unsigned int comedi_buf_write_alloc(struct comedi_async *async, unsigned int nbytes) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 602 | { |
| 603 | unsigned int free_end = async->buf_read_count + async->prealloc_bufsz; |
| 604 | |
| 605 | if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0) { |
| 606 | nbytes = free_end - async->buf_write_alloc_count; |
| 607 | } |
| 608 | async->buf_write_alloc_count += nbytes; |
| 609 | /* barrier insures the read of buf_read_count above occurs before |
| 610 | we write data to the write-alloc'ed buffer space */ |
| 611 | smp_mb(); |
| 612 | return nbytes; |
| 613 | } |
| 614 | |
| 615 | /* allocates nothing unless it can completely fulfill the request */ |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 616 | unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 617 | unsigned int nbytes) |
| 618 | { |
| 619 | unsigned int free_end = async->buf_read_count + async->prealloc_bufsz; |
| 620 | |
| 621 | if ((int)(async->buf_write_alloc_count + nbytes - free_end) > 0) { |
| 622 | nbytes = 0; |
| 623 | } |
| 624 | async->buf_write_alloc_count += nbytes; |
| 625 | /* barrier insures the read of buf_read_count above occurs before |
| 626 | we write data to the write-alloc'ed buffer space */ |
| 627 | smp_mb(); |
| 628 | return nbytes; |
| 629 | } |
| 630 | |
| 631 | /* transfers a chunk from writer to filled buffer space */ |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 632 | unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 633 | { |
| 634 | if ((int)(async->buf_write_count + nbytes - |
| 635 | async->buf_write_alloc_count) > 0) { |
| 636 | rt_printk |
| 637 | ("comedi: attempted to write-free more bytes than have been write-allocated.\n"); |
| 638 | nbytes = async->buf_write_alloc_count - async->buf_write_count; |
| 639 | } |
| 640 | async->buf_write_count += nbytes; |
| 641 | async->buf_write_ptr += nbytes; |
| 642 | comedi_buf_munge(async, async->buf_write_count - async->munge_count); |
| 643 | if (async->buf_write_ptr >= async->prealloc_bufsz) { |
| 644 | async->buf_write_ptr %= async->prealloc_bufsz; |
| 645 | } |
| 646 | return nbytes; |
| 647 | } |
| 648 | |
| 649 | /* allocates a chunk for the reader from filled (and munged) buffer space */ |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 650 | unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 651 | { |
| 652 | if ((int)(async->buf_read_alloc_count + nbytes - async->munge_count) > |
| 653 | 0) { |
| 654 | nbytes = async->munge_count - async->buf_read_alloc_count; |
| 655 | } |
| 656 | async->buf_read_alloc_count += nbytes; |
| 657 | /* barrier insures read of munge_count occurs before we actually read |
| 658 | data out of buffer */ |
| 659 | smp_rmb(); |
| 660 | return nbytes; |
| 661 | } |
| 662 | |
| 663 | /* transfers control of a chunk from reader to free buffer space */ |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 664 | unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 665 | { |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 666 | /* barrier insures data has been read out of buffer before read count is incremented */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 667 | smp_mb(); |
| 668 | if ((int)(async->buf_read_count + nbytes - |
| 669 | async->buf_read_alloc_count) > 0) { |
| 670 | rt_printk |
| 671 | ("comedi: attempted to read-free more bytes than have been read-allocated.\n"); |
| 672 | nbytes = async->buf_read_alloc_count - async->buf_read_count; |
| 673 | } |
| 674 | async->buf_read_count += nbytes; |
| 675 | async->buf_read_ptr += nbytes; |
| 676 | async->buf_read_ptr %= async->prealloc_bufsz; |
| 677 | return nbytes; |
| 678 | } |
| 679 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 680 | void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 681 | const void *data, unsigned int num_bytes) |
| 682 | { |
| 683 | unsigned int write_ptr = async->buf_write_ptr + offset; |
| 684 | |
| 685 | if (write_ptr >= async->prealloc_bufsz) |
| 686 | write_ptr %= async->prealloc_bufsz; |
| 687 | |
| 688 | while (num_bytes) { |
| 689 | unsigned int block_size; |
| 690 | |
| 691 | if (write_ptr + num_bytes > async->prealloc_bufsz) |
| 692 | block_size = async->prealloc_bufsz - write_ptr; |
| 693 | else |
| 694 | block_size = num_bytes; |
| 695 | |
| 696 | memcpy(async->prealloc_buf + write_ptr, data, block_size); |
| 697 | |
| 698 | data += block_size; |
| 699 | num_bytes -= block_size; |
| 700 | |
| 701 | write_ptr = 0; |
| 702 | } |
| 703 | } |
| 704 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 705 | void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 706 | void *dest, unsigned int nbytes) |
| 707 | { |
| 708 | void *src; |
| 709 | unsigned int read_ptr = async->buf_read_ptr + offset; |
| 710 | |
| 711 | if (read_ptr >= async->prealloc_bufsz) |
| 712 | read_ptr %= async->prealloc_bufsz; |
| 713 | |
| 714 | while (nbytes) { |
| 715 | unsigned int block_size; |
| 716 | |
| 717 | src = async->prealloc_buf + read_ptr; |
| 718 | |
| 719 | if (nbytes >= async->prealloc_bufsz - read_ptr) |
| 720 | block_size = async->prealloc_bufsz - read_ptr; |
| 721 | else |
| 722 | block_size = nbytes; |
| 723 | |
| 724 | memcpy(dest, src, block_size); |
| 725 | nbytes -= block_size; |
| 726 | dest += block_size; |
| 727 | read_ptr = 0; |
| 728 | } |
| 729 | } |
| 730 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 731 | unsigned int comedi_buf_read_n_available(struct comedi_async *async) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 732 | { |
| 733 | unsigned num_bytes; |
| 734 | |
| 735 | if (async == NULL) |
| 736 | return 0; |
| 737 | num_bytes = async->munge_count - async->buf_read_count; |
| 738 | /* barrier insures the read of munge_count in this |
| 739 | query occurs before any following reads of the buffer which |
| 740 | might be based on the return value from this query. |
| 741 | */ |
| 742 | smp_rmb(); |
| 743 | return num_bytes; |
| 744 | } |
| 745 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 746 | int comedi_buf_get(struct comedi_async *async, short *x) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 747 | { |
| 748 | unsigned int n = comedi_buf_read_n_available(async); |
| 749 | |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 750 | if (n < sizeof(short)) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 751 | return 0; |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 752 | comedi_buf_read_alloc(async, sizeof(short)); |
| 753 | *x = *(short *) (async->prealloc_buf + async->buf_read_ptr); |
| 754 | comedi_buf_read_free(async, sizeof(short)); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 755 | return 1; |
| 756 | } |
| 757 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 758 | int comedi_buf_put(struct comedi_async *async, short x) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 759 | { |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 760 | unsigned int n = comedi_buf_write_alloc_strict(async, sizeof(short)); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 761 | |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 762 | if (n < sizeof(short)) { |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 763 | async->events |= COMEDI_CB_ERROR; |
| 764 | return 0; |
| 765 | } |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 766 | *(short *) (async->prealloc_buf + async->buf_write_ptr) = x; |
| 767 | comedi_buf_write_free(async, sizeof(short)); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 768 | return 1; |
| 769 | } |
| 770 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 771 | void comedi_reset_async_buf(struct comedi_async *async) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 772 | { |
| 773 | async->buf_write_alloc_count = 0; |
| 774 | async->buf_write_count = 0; |
| 775 | async->buf_read_alloc_count = 0; |
| 776 | async->buf_read_count = 0; |
| 777 | |
| 778 | async->buf_write_ptr = 0; |
| 779 | async->buf_read_ptr = 0; |
| 780 | |
| 781 | async->cur_chan = 0; |
| 782 | async->scan_progress = 0; |
| 783 | async->munge_chan = 0; |
| 784 | async->munge_count = 0; |
| 785 | async->munge_ptr = 0; |
| 786 | |
| 787 | async->events = 0; |
| 788 | } |
| 789 | |
| 790 | int comedi_auto_config(struct device *hardware_device, const char *board_name, const int *options, unsigned num_options) |
| 791 | { |
Bill Pemberton | 0707bb0 | 2009-03-16 22:06:20 -0400 | [diff] [blame] | 792 | struct comedi_devconfig it; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 793 | int minor; |
| 794 | struct comedi_device_file_info *dev_file_info; |
| 795 | int retval; |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 796 | unsigned *private_data = NULL; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 797 | |
Ian Abbott | 719548e | 2008-12-09 11:07:22 +0000 | [diff] [blame] | 798 | if (!comedi_autoconfig) { |
| 799 | dev_set_drvdata(hardware_device, NULL); |
| 800 | return 0; |
| 801 | } |
Ian Abbott | 6a9d7a2 | 2008-12-08 17:05:50 +0000 | [diff] [blame] | 802 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 803 | minor = comedi_alloc_board_minor(hardware_device); |
| 804 | if(minor < 0) return minor; |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 805 | |
| 806 | private_data = kmalloc(sizeof(unsigned), GFP_KERNEL); |
| 807 | if (private_data == NULL) { |
| 808 | retval = -ENOMEM; |
| 809 | goto cleanup; |
| 810 | } |
| 811 | *private_data = minor; |
| 812 | dev_set_drvdata(hardware_device, private_data); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 813 | |
| 814 | dev_file_info = comedi_get_device_file_info(minor); |
| 815 | |
| 816 | memset(&it, 0, sizeof(it)); |
| 817 | strncpy(it.board_name, board_name, COMEDI_NAMELEN); |
| 818 | it.board_name[COMEDI_NAMELEN - 1] = '\0'; |
| 819 | BUG_ON(num_options > COMEDI_NDEVCONFOPTS); |
| 820 | memcpy(it.options, options, num_options * sizeof(int)); |
| 821 | |
| 822 | mutex_lock(&dev_file_info->device->mutex); |
| 823 | retval = comedi_device_attach(dev_file_info->device, &it); |
| 824 | mutex_unlock(&dev_file_info->device->mutex); |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 825 | |
| 826 | cleanup: |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 827 | if(retval < 0) |
| 828 | { |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 829 | kfree(private_data); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 830 | comedi_free_board_minor(minor); |
| 831 | } |
| 832 | return retval; |
| 833 | } |
| 834 | |
| 835 | void comedi_auto_unconfig(struct device *hardware_device) |
| 836 | { |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 837 | unsigned *minor = (unsigned *)dev_get_drvdata(hardware_device); |
| 838 | if(minor == NULL) return; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 839 | |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 840 | BUG_ON(*minor >= COMEDI_NUM_BOARD_MINORS); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 841 | |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 842 | comedi_free_board_minor(*minor); |
| 843 | dev_set_drvdata(hardware_device, NULL); |
| 844 | kfree(minor); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | int comedi_pci_auto_config(struct pci_dev *pcidev, const char *board_name) |
| 848 | { |
| 849 | int options[2]; |
| 850 | |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 851 | /* pci bus */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 852 | options[0] = pcidev->bus->number; |
Bill Pemberton | b6c7775 | 2009-03-16 22:03:24 -0400 | [diff] [blame] | 853 | /* pci slot */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 854 | options[1] = PCI_SLOT(pcidev->devfn); |
| 855 | |
| 856 | return comedi_auto_config(&pcidev->dev, board_name, options, sizeof(options) / sizeof(options[0])); |
| 857 | } |
| 858 | |
| 859 | void comedi_pci_auto_unconfig(struct pci_dev *pcidev) |
| 860 | { |
| 861 | comedi_auto_unconfig(&pcidev->dev); |
| 862 | } |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 863 | |
| 864 | int comedi_usb_auto_config(struct usb_device *usbdev, |
| 865 | const char *board_name) |
| 866 | { |
| 867 | BUG_ON(usbdev == NULL); |
| 868 | return comedi_auto_config(&usbdev->dev, board_name, NULL, 0); |
| 869 | } |
| 870 | |
| 871 | void comedi_usb_auto_unconfig(struct usb_device *usbdev) |
| 872 | { |
| 873 | BUG_ON(usbdev == NULL); |
| 874 | comedi_auto_unconfig(&usbdev->dev); |
| 875 | } |