David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 1 | /* |
| 2 | include/linux/comedidev.h |
| 3 | header file for kernel-only structures, variables, and constants |
| 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 | #ifndef _COMEDIDEV_H |
| 25 | #define _COMEDIDEV_H |
| 26 | |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/module.h> |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 29 | #include <linux/kdev_t.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/errno.h> |
| 32 | #include <linux/spinlock.h> |
| 33 | #include <linux/mutex.h> |
| 34 | #include <linux/wait.h> |
| 35 | #include <linux/mm.h> |
| 36 | #include <linux/init.h> |
| 37 | #include <linux/vmalloc.h> |
David Schleef | 74b847f | 2008-11-14 14:20:56 -0800 | [diff] [blame] | 38 | #include "interrupt.h" |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 39 | #include <linux/dma-mapping.h> |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 40 | #include <linux/uaccess.h> |
| 41 | #include <linux/io.h> |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 42 | |
| 43 | #include "comedi.h" |
| 44 | |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 45 | #define DPRINTK(format, args...) do { \ |
| 46 | if (comedi_debug) \ |
| 47 | printk(KERN_DEBUG "comedi: " format , ## args); \ |
| 48 | } while (0) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 49 | |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 50 | #define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c)) |
| 51 | #define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, COMEDI_MINORVERSION, COMEDI_MICROVERSION) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 52 | #define COMEDI_RELEASE VERSION |
| 53 | |
| 54 | #define COMEDI_INITCLEANUP_NOMODULE(x) \ |
| 55 | static int __init x ## _init_module(void) \ |
Bill Pemberton | 51b713a | 2009-03-16 22:04:12 -0400 | [diff] [blame] | 56 | {return comedi_driver_register(&(x)); } \ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 57 | static void __exit x ## _cleanup_module(void) \ |
Bill Pemberton | 51b713a | 2009-03-16 22:04:12 -0400 | [diff] [blame] | 58 | {comedi_driver_unregister(&(x)); } \ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 59 | module_init(x ## _init_module); \ |
| 60 | module_exit(x ## _cleanup_module); \ |
| 61 | |
| 62 | #define COMEDI_MODULE_MACROS \ |
| 63 | MODULE_AUTHOR("Comedi http://www.comedi.org"); \ |
| 64 | MODULE_DESCRIPTION("Comedi low-level driver"); \ |
| 65 | MODULE_LICENSE("GPL"); \ |
| 66 | |
| 67 | #define COMEDI_INITCLEANUP(x) \ |
| 68 | COMEDI_MODULE_MACROS \ |
| 69 | COMEDI_INITCLEANUP_NOMODULE(x) |
| 70 | |
| 71 | #define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \ |
| 72 | static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \ |
| 73 | const struct pci_device_id *ent) \ |
| 74 | { \ |
| 75 | return comedi_pci_auto_config(dev, comedi_driver.driver_name); \ |
| 76 | } \ |
| 77 | static void __devexit comedi_driver ## _pci_remove(struct pci_dev *dev) \ |
| 78 | { \ |
| 79 | comedi_pci_auto_unconfig(dev); \ |
| 80 | } \ |
| 81 | static struct pci_driver comedi_driver ## _pci_driver = \ |
| 82 | { \ |
| 83 | .id_table = pci_id_table, \ |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 84 | .probe = &comedi_driver ## _pci_probe, \ |
| 85 | .remove = __devexit_p(&comedi_driver ## _pci_remove) \ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 86 | }; \ |
| 87 | static int __init comedi_driver ## _init_module(void) \ |
| 88 | { \ |
| 89 | int retval; \ |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 90 | retval = comedi_driver_register(&comedi_driver); \ |
| 91 | if (retval < 0) \ |
| 92 | return retval; \ |
| 93 | comedi_driver ## _pci_driver.name = (char *)comedi_driver.driver_name; \ |
| 94 | return pci_register_driver(&comedi_driver ## _pci_driver); \ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 95 | } \ |
| 96 | static void __exit comedi_driver ## _cleanup_module(void) \ |
| 97 | { \ |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 98 | pci_unregister_driver(&comedi_driver ## _pci_driver); \ |
| 99 | comedi_driver_unregister(&comedi_driver); \ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 100 | } \ |
| 101 | module_init(comedi_driver ## _init_module); \ |
| 102 | module_exit(comedi_driver ## _cleanup_module); |
| 103 | |
| 104 | #define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \ |
| 105 | COMEDI_MODULE_MACROS \ |
| 106 | COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) |
| 107 | |
| 108 | #define PCI_VENDOR_ID_INOVA 0x104c |
| 109 | #define PCI_VENDOR_ID_NATINST 0x1093 |
| 110 | #define PCI_VENDOR_ID_DATX 0x1116 |
| 111 | #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307 |
| 112 | #define PCI_VENDOR_ID_ADVANTECH 0x13fe |
| 113 | #define PCI_VENDOR_ID_RTD 0x1435 |
| 114 | #define PCI_VENDOR_ID_AMPLICON 0x14dc |
| 115 | #define PCI_VENDOR_ID_ADLINK 0x144a |
| 116 | #define PCI_VENDOR_ID_ICP 0x104c |
| 117 | #define PCI_VENDOR_ID_CONTEC 0x1221 |
| 118 | #define PCI_VENDOR_ID_MEILHAUS 0x1402 |
| 119 | |
| 120 | #define COMEDI_NUM_MINORS 0x100 |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 121 | #define COMEDI_NUM_BOARD_MINORS 0x30 |
| 122 | #define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS |
| 123 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 124 | #define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \ |
| 125 | device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt) |
| 126 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 127 | struct comedi_subdevice { |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 128 | struct comedi_device *device; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 129 | int type; |
| 130 | int n_chan; |
| 131 | volatile int subdev_flags; |
| 132 | int len_chanlist; /* maximum length of channel/gain list */ |
| 133 | |
| 134 | void *private; |
| 135 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 136 | struct comedi_async *async; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 137 | |
| 138 | void *lock; |
| 139 | void *busy; |
| 140 | unsigned runflags; |
| 141 | spinlock_t spin_lock; |
| 142 | |
| 143 | int io_bits; |
| 144 | |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 145 | unsigned int maxdata; /* if maxdata==0, use list */ |
| 146 | const unsigned int *maxdata_list; /* list is channel specific */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 147 | |
| 148 | unsigned int flags; |
| 149 | const unsigned int *flaglist; |
| 150 | |
| 151 | unsigned int settling_time_0; |
| 152 | |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 153 | const struct comedi_lrange *range_table; |
| 154 | const struct comedi_lrange *const *range_table_list; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 155 | |
| 156 | unsigned int *chanlist; /* driver-owned chanlist (not used) */ |
| 157 | |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 158 | int (*insn_read) (struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 159 | unsigned int *); |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 160 | int (*insn_write) (struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 161 | unsigned int *); |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 162 | int (*insn_bits) (struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 163 | unsigned int *); |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 164 | int (*insn_config) (struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 165 | unsigned int *); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 166 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 167 | int (*do_cmd) (struct comedi_device *, struct comedi_subdevice *); |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 168 | int (*do_cmdtest) (struct comedi_device *, struct comedi_subdevice *, struct comedi_cmd *); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 169 | int (*poll) (struct comedi_device *, struct comedi_subdevice *); |
| 170 | int (*cancel) (struct comedi_device *, struct comedi_subdevice *); |
| 171 | /* int (*do_lock)(struct comedi_device *,struct comedi_subdevice *); */ |
| 172 | /* int (*do_unlock)(struct comedi_device *,struct comedi_subdevice *); */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 173 | |
| 174 | /* called when the buffer changes */ |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 175 | int (*buf_change) (struct comedi_device *dev, struct comedi_subdevice *s, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 176 | unsigned long new_size); |
| 177 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 178 | void (*munge) (struct comedi_device *dev, struct comedi_subdevice *s, void *data, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 179 | unsigned int num_bytes, unsigned int start_chan_index); |
| 180 | enum dma_data_direction async_dma_dir; |
| 181 | |
| 182 | unsigned int state; |
| 183 | |
Bill Pemberton | 0bfbbe8 | 2009-03-16 22:05:36 -0400 | [diff] [blame] | 184 | struct device *class_dev; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 185 | int minor; |
| 186 | }; |
| 187 | |
| 188 | struct comedi_buf_page { |
| 189 | void *virt_addr; |
| 190 | dma_addr_t dma_addr; |
| 191 | }; |
| 192 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 193 | struct comedi_async { |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 194 | struct comedi_subdevice *subdevice; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 195 | |
| 196 | void *prealloc_buf; /* pre-allocated buffer */ |
| 197 | unsigned int prealloc_bufsz; /* buffer size, in bytes */ |
| 198 | struct comedi_buf_page *buf_page_list; /* virtual and dma address of each page */ |
| 199 | unsigned n_buf_pages; /* num elements in buf_page_list */ |
| 200 | |
| 201 | unsigned int max_bufsize; /* maximum buffer size, bytes */ |
| 202 | unsigned int mmap_count; /* current number of mmaps of prealloc_buf */ |
| 203 | |
| 204 | unsigned int buf_write_count; /* byte count for writer (write completed) */ |
| 205 | unsigned int buf_write_alloc_count; /* byte count for writer (allocated for writing) */ |
| 206 | unsigned int buf_read_count; /* byte count for reader (read completed) */ |
| 207 | unsigned int buf_read_alloc_count; /* byte count for reader (allocated for reading) */ |
| 208 | |
| 209 | unsigned int buf_write_ptr; /* buffer marker for writer */ |
| 210 | unsigned int buf_read_ptr; /* buffer marker for reader */ |
| 211 | |
| 212 | unsigned int cur_chan; /* useless channel marker for interrupt */ |
| 213 | /* number of bytes that have been received for current scan */ |
| 214 | unsigned int scan_progress; |
| 215 | /* keeps track of where we are in chanlist as for munging */ |
| 216 | unsigned int munge_chan; |
| 217 | /* number of bytes that have been munged */ |
| 218 | unsigned int munge_count; |
| 219 | /* buffer marker for munging */ |
| 220 | unsigned int munge_ptr; |
| 221 | |
| 222 | unsigned int events; /* events that have occurred */ |
| 223 | |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 224 | struct comedi_cmd cmd; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 225 | |
| 226 | wait_queue_head_t wait_head; |
| 227 | |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 228 | /* callback stuff */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 229 | unsigned int cb_mask; |
| 230 | int (*cb_func) (unsigned int flags, void *); |
| 231 | void *cb_arg; |
| 232 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 233 | int (*inttrig) (struct comedi_device *dev, struct comedi_subdevice *s, |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 234 | unsigned int x); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 235 | }; |
| 236 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 237 | struct comedi_driver { |
| 238 | struct comedi_driver *next; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 239 | |
| 240 | const char *driver_name; |
| 241 | struct module *module; |
Bill Pemberton | 0707bb0 | 2009-03-16 22:06:20 -0400 | [diff] [blame] | 242 | int (*attach) (struct comedi_device *, struct comedi_devconfig *); |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 243 | int (*detach) (struct comedi_device *); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 244 | |
| 245 | /* number of elements in board_name and board_id arrays */ |
| 246 | unsigned int num_names; |
| 247 | const char *const *board_name; |
| 248 | /* offset in bytes from one board name pointer to the next */ |
| 249 | int offset; |
| 250 | }; |
| 251 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 252 | struct comedi_device { |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 253 | int use_count; |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 254 | struct comedi_driver *driver; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 255 | void *private; |
| 256 | |
Bill Pemberton | 0bfbbe8 | 2009-03-16 22:05:36 -0400 | [diff] [blame] | 257 | struct device *class_dev; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 258 | int minor; |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 259 | /* hw_dev is passed to dma_alloc_coherent when allocating async buffers |
| 260 | * for subdevices that have async_dma_dir set to something other than |
| 261 | * DMA_NONE */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 262 | struct device *hw_dev; |
| 263 | |
| 264 | const char *board_name; |
| 265 | const void *board_ptr; |
| 266 | int attached; |
| 267 | int rt; |
| 268 | spinlock_t spinlock; |
| 269 | struct mutex mutex; |
| 270 | int in_request_module; |
| 271 | |
| 272 | int n_subdevices; |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 273 | struct comedi_subdevice *subdevices; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 274 | |
| 275 | /* dumb */ |
| 276 | unsigned long iobase; |
| 277 | unsigned int irq; |
| 278 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 279 | struct comedi_subdevice *read_subdev; |
| 280 | struct comedi_subdevice *write_subdev; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 281 | |
| 282 | struct fasync_struct *async_queue; |
| 283 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 284 | void (*open) (struct comedi_device *dev); |
| 285 | void (*close) (struct comedi_device *dev); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 286 | }; |
| 287 | |
| 288 | struct comedi_device_file_info { |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 289 | struct comedi_device *device; |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 290 | struct comedi_subdevice *read_subdevice; |
| 291 | struct comedi_subdevice *write_subdevice; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 292 | }; |
| 293 | |
| 294 | #ifdef CONFIG_COMEDI_DEBUG |
| 295 | extern int comedi_debug; |
| 296 | #else |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 297 | static const int comedi_debug; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 298 | #endif |
| 299 | |
| 300 | /* |
| 301 | * function prototypes |
| 302 | */ |
| 303 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 304 | void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s); |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 305 | void comedi_error(const struct comedi_device *dev, const char *s); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 306 | |
| 307 | /* we can expand the number of bits used to encode devices/subdevices into |
| 308 | the minor number soon, after more distros support > 8 bit minor numbers |
| 309 | (like after Debian Etch gets released) */ |
| 310 | enum comedi_minor_bits { |
| 311 | COMEDI_DEVICE_MINOR_MASK = 0xf, |
| 312 | COMEDI_SUBDEVICE_MINOR_MASK = 0xf0 |
| 313 | }; |
| 314 | static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4; |
| 315 | static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1; |
| 316 | |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 317 | struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 318 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 319 | static inline struct comedi_subdevice *comedi_get_read_subdevice( |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 320 | const struct comedi_device_file_info *info) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 321 | { |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 322 | if (info->read_subdevice) |
| 323 | return info->read_subdevice; |
| 324 | if (info->device == NULL) |
| 325 | return NULL; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 326 | return info->device->read_subdev; |
| 327 | } |
| 328 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 329 | static inline struct comedi_subdevice *comedi_get_write_subdevice( |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 330 | const struct comedi_device_file_info *info) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 331 | { |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 332 | if (info->write_subdevice) |
| 333 | return info->write_subdevice; |
| 334 | if (info->device == NULL) |
| 335 | return NULL; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 336 | return info->device->write_subdev; |
| 337 | } |
| 338 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 339 | void comedi_device_detach(struct comedi_device *dev); |
Bill Pemberton | 0707bb0 | 2009-03-16 22:06:20 -0400 | [diff] [blame] | 340 | int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 341 | int comedi_driver_register(struct comedi_driver *); |
| 342 | int comedi_driver_unregister(struct comedi_driver *); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 343 | |
| 344 | void init_polling(void); |
| 345 | void cleanup_polling(void); |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 346 | void start_polling(struct comedi_device *); |
| 347 | void stop_polling(struct comedi_device *); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 348 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 349 | int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, unsigned long |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 350 | new_size); |
| 351 | |
| 352 | #ifdef CONFIG_PROC_FS |
| 353 | void comedi_proc_init(void); |
| 354 | void comedi_proc_cleanup(void); |
| 355 | #else |
| 356 | static inline void comedi_proc_init(void) |
| 357 | { |
| 358 | } |
| 359 | static inline void comedi_proc_cleanup(void) |
| 360 | { |
| 361 | } |
| 362 | #endif |
| 363 | |
| 364 | /* subdevice runflags */ |
| 365 | enum subdevice_runflags { |
| 366 | SRF_USER = 0x00000001, |
| 367 | SRF_RT = 0x00000002, |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 368 | /* indicates an COMEDI_CB_ERROR event has occurred since the last |
| 369 | * command was started */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 370 | SRF_ERROR = 0x00000004, |
| 371 | SRF_RUNNING = 0x08000000 |
| 372 | }; |
| 373 | |
| 374 | /* |
| 375 | various internal comedi functions |
| 376 | */ |
| 377 | |
Bill Pemberton | d0a353f | 2009-03-16 22:06:26 -0400 | [diff] [blame] | 378 | int do_rangeinfo_ioctl(struct comedi_device *dev, struct comedi_rangeinfo *arg); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 379 | int check_chanlist(struct comedi_subdevice *s, int n, unsigned int *chanlist); |
| 380 | void comedi_set_subdevice_runflags(struct comedi_subdevice *s, unsigned mask, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 381 | unsigned bits); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 382 | unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s); |
| 383 | int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s, |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 384 | struct comedi_insn *insn, unsigned int *data); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 385 | |
| 386 | /* range stuff */ |
| 387 | |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 388 | #define RANGE(a, b) {(a)*1e6, (b)*1e6, 0} |
| 389 | #define RANGE_ext(a, b) {(a)*1e6, (b)*1e6, RF_EXTERNAL} |
| 390 | #define RANGE_mA(a, b) {(a)*1e6, (b)*1e6, UNIT_mA} |
| 391 | #define RANGE_unitless(a, b) {(a)*1e6, (b)*1e6, 0} /* XXX */ |
| 392 | #define BIP_RANGE(a) {-(a)*1e6, (a)*1e6, 0} |
| 393 | #define UNI_RANGE(a) {0, (a)*1e6, 0} |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 394 | |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 395 | extern const struct comedi_lrange range_bipolar10; |
| 396 | extern const struct comedi_lrange range_bipolar5; |
| 397 | extern const struct comedi_lrange range_bipolar2_5; |
| 398 | extern const struct comedi_lrange range_unipolar10; |
| 399 | extern const struct comedi_lrange range_unipolar5; |
| 400 | extern const struct comedi_lrange range_unknown; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 401 | |
| 402 | #define range_digital range_unipolar5 |
| 403 | |
| 404 | #if __GNUC__ >= 3 |
| 405 | #define GCC_ZERO_LENGTH_ARRAY |
| 406 | #else |
| 407 | #define GCC_ZERO_LENGTH_ARRAY 0 |
| 408 | #endif |
| 409 | |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 410 | struct comedi_lrange { |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 411 | int length; |
Bill Pemberton | 1f6325d | 2009-03-16 22:06:31 -0400 | [diff] [blame] | 412 | struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY]; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 413 | }; |
| 414 | |
| 415 | /* some silly little inline functions */ |
| 416 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 417 | static inline int alloc_subdevices(struct comedi_device *dev, |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 418 | unsigned int num_subdevices) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 419 | { |
| 420 | unsigned i; |
| 421 | |
| 422 | dev->n_subdevices = num_subdevices; |
| 423 | dev->subdevices = |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 424 | kcalloc(num_subdevices, sizeof(struct comedi_subdevice), GFP_KERNEL); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 425 | if (!dev->subdevices) |
| 426 | return -ENOMEM; |
| 427 | for (i = 0; i < num_subdevices; ++i) { |
| 428 | dev->subdevices[i].device = dev; |
| 429 | dev->subdevices[i].async_dma_dir = DMA_NONE; |
| 430 | spin_lock_init(&dev->subdevices[i].spin_lock); |
| 431 | dev->subdevices[i].minor = -1; |
| 432 | } |
| 433 | return 0; |
| 434 | } |
| 435 | |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 436 | static inline int alloc_private(struct comedi_device *dev, int size) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 437 | { |
| 438 | dev->private = kzalloc(size, GFP_KERNEL); |
| 439 | if (!dev->private) |
| 440 | return -ENOMEM; |
| 441 | return 0; |
| 442 | } |
| 443 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 444 | static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 445 | { |
| 446 | if (subd->subdev_flags & SDF_LSAMPL) |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 447 | return sizeof(unsigned int); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 448 | else |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 449 | return sizeof(short); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 450 | } |
| 451 | |
| 452 | /* must be used in attach to set dev->hw_dev if you wish to dma directly |
| 453 | into comedi's buffer */ |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 454 | static inline void comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 455 | { |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 456 | if (dev->hw_dev) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 457 | put_device(dev->hw_dev); |
Greg Kroah-Hartman | e0dcef7 | 2008-11-13 16:36:22 -0800 | [diff] [blame] | 458 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 459 | dev->hw_dev = hw_dev; |
| 460 | if (dev->hw_dev) { |
| 461 | dev->hw_dev = get_device(dev->hw_dev); |
| 462 | BUG_ON(dev->hw_dev == NULL); |
| 463 | } |
| 464 | } |
| 465 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 466 | int comedi_buf_put(struct comedi_async *async, short x); |
| 467 | int comedi_buf_get(struct comedi_async *async, short *x); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 468 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 469 | unsigned int comedi_buf_write_n_available(struct comedi_async *async); |
| 470 | unsigned int comedi_buf_write_alloc(struct comedi_async *async, unsigned int nbytes); |
| 471 | unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 472 | unsigned int nbytes); |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 473 | unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes); |
| 474 | unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes); |
| 475 | unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes); |
| 476 | unsigned int comedi_buf_read_n_available(struct comedi_async *async); |
| 477 | void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 478 | const void *source, unsigned int num_bytes); |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 479 | void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset, |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 480 | void *destination, unsigned int num_bytes); |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 481 | static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 482 | { |
| 483 | return async->buf_write_alloc_count - async->buf_write_count; |
| 484 | } |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 485 | static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 486 | { |
| 487 | return async->buf_read_alloc_count - async->buf_read_count; |
| 488 | } |
| 489 | |
Bill Pemberton | d163679 | 2009-03-16 22:05:20 -0400 | [diff] [blame] | 490 | void comedi_reset_async_buf(struct comedi_async *async); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 491 | |
| 492 | static inline void *comedi_aux_data(int options[], int n) |
| 493 | { |
| 494 | unsigned long address; |
| 495 | unsigned long addressLow; |
| 496 | int bit_shift; |
| 497 | if (sizeof(int) >= sizeof(void *)) |
| 498 | address = options[COMEDI_DEVCONF_AUX_DATA_LO]; |
| 499 | else { |
| 500 | address = options[COMEDI_DEVCONF_AUX_DATA_HI]; |
| 501 | bit_shift = sizeof(int) * 8; |
| 502 | address <<= bit_shift; |
| 503 | addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO]; |
| 504 | addressLow &= (1UL << bit_shift) - 1; |
| 505 | address |= addressLow; |
| 506 | } |
| 507 | if (n >= 1) |
| 508 | address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH]; |
| 509 | if (n >= 2) |
| 510 | address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH]; |
| 511 | if (n >= 3) |
| 512 | address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH]; |
| 513 | BUG_ON(n > 3); |
| 514 | return (void *)address; |
| 515 | } |
| 516 | |
| 517 | int comedi_alloc_board_minor(struct device *hardware_device); |
| 518 | void comedi_free_board_minor(unsigned minor); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 519 | int comedi_alloc_subdevice_minor(struct comedi_device *dev, struct comedi_subdevice *s); |
| 520 | void comedi_free_subdevice_minor(struct comedi_subdevice *s); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 521 | int comedi_pci_auto_config(struct pci_dev *pcidev, const char *board_name); |
| 522 | void comedi_pci_auto_unconfig(struct pci_dev *pcidev); |
Bernd Porr | c28264d | 2008-12-08 23:30:13 +0000 | [diff] [blame] | 523 | struct usb_device; /* forward declaration */ |
| 524 | int comedi_usb_auto_config(struct usb_device *usbdev, const char *board_name); |
| 525 | void comedi_usb_auto_unconfig(struct usb_device *usbdev); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 526 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 527 | #include "comedi_rt.h" |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 528 | |
| 529 | #endif /* _COMEDIDEV_H */ |