drivers/staging/comedi/drivers/pcl812.c

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This source file includes following definitions.
pcl812_ai_setup_dma
pcl812_ai_set_chan_range
pcl812_ai_clear_eoc
pcl812_ai_soft_trig
pcl812_ai_get_sample
pcl812_ai_eoc
pcl812_ai_cmdtest
pcl812_ai_cmd
pcl812_ai_next_chan
pcl812_handle_eoc
transfer_from_dma_buf
pcl812_handle_dma
pcl812_interrupt
pcl812_ai_poll
pcl812_ai_cancel
pcl812_ai_insn_read
pcl812_ao_insn_write
pcl812_di_insn_bits
pcl812_do_insn_bits
pcl812_reset
pcl812_set_ai_range_table
pcl812_alloc_dma
pcl812_free_dma
pcl812_attach
pcl812_detach
   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * comedi/drivers/pcl812.c
   4  *
   5  * Author: Michal Dobes <dobes@tesnet.cz>
   6  *
   7  * hardware driver for Advantech cards
   8  *  card:   PCL-812, PCL-812PG, PCL-813, PCL-813B
   9  *  driver: pcl812,  pcl812pg,  pcl813,  pcl813b
  10  * and for ADlink cards
  11  *  card:   ACL-8112DG, ACL-8112HG, ACL-8112PG, ACL-8113, ACL-8216
  12  *  driver: acl8112dg,  acl8112hg,  acl8112pg,  acl8113,  acl8216
  13  * and for ICP DAS cards
  14  *  card:   ISO-813, A-821PGH, A-821PGL, A-821PGL-NDA, A-822PGH, A-822PGL,
  15  *  driver: iso813,  a821pgh,  a-821pgl, a-821pglnda,  a822pgh,  a822pgl,
  16  *  card:   A-823PGH, A-823PGL, A-826PG
  17  * driver:  a823pgh,  a823pgl,  a826pg
  18  */
  19 
  20 /*
  21  * Driver: pcl812
  22  * Description: Advantech PCL-812/PG, PCL-813/B,
  23  *           ADLink ACL-8112DG/HG/PG, ACL-8113, ACL-8216,
  24  *           ICP DAS A-821PGH/PGL/PGL-NDA, A-822PGH/PGL, A-823PGH/PGL, A-826PG,
  25  *           ICP DAS ISO-813
  26  * Author: Michal Dobes <dobes@tesnet.cz>
  27  * Devices: [Advantech] PCL-812 (pcl812), PCL-812PG (pcl812pg),
  28  *      PCL-813 (pcl813), PCL-813B (pcl813b), [ADLink] ACL-8112DG (acl8112dg),
  29  *      ACL-8112HG (acl8112hg), ACL-8113 (acl-8113), ACL-8216 (acl8216),
  30  *      [ICP] ISO-813 (iso813), A-821PGH (a821pgh), A-821PGL (a821pgl),
  31  *      A-821PGL-NDA (a821pclnda), A-822PGH (a822pgh), A-822PGL (a822pgl),
  32  *      A-823PGH (a823pgh), A-823PGL (a823pgl), A-826PG (a826pg)
  33  * Updated: Mon, 06 Aug 2007 12:03:15 +0100
  34  * Status: works (I hope. My board fire up under my hands
  35  *             and I cann't test all features.)
  36  *
  37  * This driver supports insn and cmd interfaces. Some boards support only insn
  38  * because their hardware don't allow more (PCL-813/B, ACL-8113, ISO-813).
  39  * Data transfer over DMA is supported only when you measure only one
  40  * channel, this is too hardware limitation of these boards.
  41  *
  42  * Options for PCL-812:
  43  *   [0] - IO Base
  44  *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
  45  *   [2] - DMA  (0=disable, 1, 3)
  46  *   [3] - 0=trigger source is internal 8253 with 2MHz clock
  47  *         1=trigger source is external
  48  *   [4] - 0=A/D input range is +/-10V
  49  *         1=A/D input range is +/-5V
  50  *         2=A/D input range is +/-2.5V
  51  *         3=A/D input range is +/-1.25V
  52  *         4=A/D input range is +/-0.625V
  53  *         5=A/D input range is +/-0.3125V
  54  *   [5] - 0=D/A outputs 0-5V  (internal reference -5V)
  55  *         1=D/A outputs 0-10V (internal reference -10V)
  56  *         2=D/A outputs unknown (external reference)
  57  *
  58  * Options for PCL-812PG, ACL-8112PG:
  59  *   [0] - IO Base
  60  *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
  61  *   [2] - DMA  (0=disable, 1, 3)
  62  *   [3] - 0=trigger source is internal 8253 with 2MHz clock
  63  *         1=trigger source is external
  64  *   [4] - 0=A/D have max +/-5V input
  65  *         1=A/D have max +/-10V input
  66  *   [5] - 0=D/A outputs 0-5V  (internal reference -5V)
  67  *         1=D/A outputs 0-10V (internal reference -10V)
  68  *         2=D/A outputs unknown (external reference)
  69  *
  70  * Options for ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH, ACL-8216, A-826PG:
  71  *   [0] - IO Base
  72  *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
  73  *   [2] - DMA  (0=disable, 1, 3)
  74  *   [3] - 0=trigger source is internal 8253 with 2MHz clock
  75  *         1=trigger source is external
  76  *   [4] - 0=A/D channels are S.E.
  77  *         1=A/D channels are DIFF
  78  *   [5] - 0=D/A outputs 0-5V  (internal reference -5V)
  79  *         1=D/A outputs 0-10V (internal reference -10V)
  80  *         2=D/A outputs unknown (external reference)
  81  *
  82  * Options for A-821PGL/PGH:
  83  *   [0] - IO Base
  84  *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7)
  85  *   [2] - 0=A/D channels are S.E.
  86  *         1=A/D channels are DIFF
  87  *   [3] - 0=D/A output 0-5V  (internal reference -5V)
  88  *         1=D/A output 0-10V (internal reference -10V)
  89  *
  90  * Options for A-821PGL-NDA:
  91  *   [0] - IO Base
  92  *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7)
  93  *   [2] - 0=A/D channels are S.E.
  94  *         1=A/D channels are DIFF
  95  *
  96  * Options for PCL-813:
  97  *   [0] - IO Base
  98  *
  99  * Options for PCL-813B:
 100  *   [0] - IO Base
 101  *   [1] - 0= bipolar inputs
 102  *         1= unipolar inputs
 103  *
 104  * Options for ACL-8113, ISO-813:
 105  *   [0] - IO Base
 106  *   [1] - 0= 10V bipolar inputs
 107  *         1= 10V unipolar inputs
 108  *         2= 20V bipolar inputs
 109  *         3= 20V unipolar inputs
 110  */
 111 
 112 #include <linux/module.h>
 113 #include <linux/interrupt.h>
 114 #include <linux/gfp.h>
 115 #include <linux/delay.h>
 116 #include <linux/io.h>
 117 
 118 #include "../comedidev.h"
 119 
 120 #include "comedi_isadma.h"
 121 #include "comedi_8254.h"
 122 
 123 /*
 124  * Register I/O map
 125  */
 126 #define PCL812_TIMER_BASE                       0x00
 127 #define PCL812_AI_LSB_REG                       0x04
 128 #define PCL812_AI_MSB_REG                       0x05
 129 #define PCL812_AI_MSB_DRDY                      BIT(4)
 130 #define PCL812_AO_LSB_REG(x)                    (0x04 + ((x) * 2))
 131 #define PCL812_AO_MSB_REG(x)                    (0x05 + ((x) * 2))
 132 #define PCL812_DI_LSB_REG                       0x06
 133 #define PCL812_DI_MSB_REG                       0x07
 134 #define PCL812_STATUS_REG                       0x08
 135 #define PCL812_STATUS_DRDY                      BIT(5)
 136 #define PCL812_RANGE_REG                        0x09
 137 #define PCL812_MUX_REG                          0x0a
 138 #define PCL812_MUX_CHAN(x)                      ((x) << 0)
 139 #define PCL812_MUX_CS0                          BIT(4)
 140 #define PCL812_MUX_CS1                          BIT(5)
 141 #define PCL812_CTRL_REG                         0x0b
 142 #define PCL812_CTRL_TRIG(x)                     (((x) & 0x7) << 0)
 143 #define PCL812_CTRL_DISABLE_TRIG                PCL812_CTRL_TRIG(0)
 144 #define PCL812_CTRL_SOFT_TRIG                   PCL812_CTRL_TRIG(1)
 145 #define PCL812_CTRL_PACER_DMA_TRIG              PCL812_CTRL_TRIG(2)
 146 #define PCL812_CTRL_PACER_EOC_TRIG              PCL812_CTRL_TRIG(6)
 147 #define PCL812_SOFTTRIG_REG                     0x0c
 148 #define PCL812_DO_LSB_REG                       0x0d
 149 #define PCL812_DO_MSB_REG                       0x0e
 150 
 151 #define MAX_CHANLIST_LEN    256 /* length of scan list */
 152 
 153 static const struct comedi_lrange range_pcl812pg_ai = {
 154         5, {
 155                 BIP_RANGE(5),
 156                 BIP_RANGE(2.5),
 157                 BIP_RANGE(1.25),
 158                 BIP_RANGE(0.625),
 159                 BIP_RANGE(0.3125)
 160         }
 161 };
 162 
 163 static const struct comedi_lrange range_pcl812pg2_ai = {
 164         5, {
 165                 BIP_RANGE(10),
 166                 BIP_RANGE(5),
 167                 BIP_RANGE(2.5),
 168                 BIP_RANGE(1.25),
 169                 BIP_RANGE(0.625)
 170         }
 171 };
 172 
 173 static const struct comedi_lrange range812_bipolar1_25 = {
 174         1, {
 175                 BIP_RANGE(1.25)
 176         }
 177 };
 178 
 179 static const struct comedi_lrange range812_bipolar0_625 = {
 180         1, {
 181                 BIP_RANGE(0.625)
 182         }
 183 };
 184 
 185 static const struct comedi_lrange range812_bipolar0_3125 = {
 186         1, {
 187                 BIP_RANGE(0.3125)
 188         }
 189 };
 190 
 191 static const struct comedi_lrange range_pcl813b_ai = {
 192         4, {
 193                 BIP_RANGE(5),
 194                 BIP_RANGE(2.5),
 195                 BIP_RANGE(1.25),
 196                 BIP_RANGE(0.625)
 197         }
 198 };
 199 
 200 static const struct comedi_lrange range_pcl813b2_ai = {
 201         4, {
 202                 UNI_RANGE(10),
 203                 UNI_RANGE(5),
 204                 UNI_RANGE(2.5),
 205                 UNI_RANGE(1.25)
 206         }
 207 };
 208 
 209 static const struct comedi_lrange range_iso813_1_ai = {
 210         5, {
 211                 BIP_RANGE(5),
 212                 BIP_RANGE(2.5),
 213                 BIP_RANGE(1.25),
 214                 BIP_RANGE(0.625),
 215                 BIP_RANGE(0.3125)
 216         }
 217 };
 218 
 219 static const struct comedi_lrange range_iso813_1_2_ai = {
 220         5, {
 221                 UNI_RANGE(10),
 222                 UNI_RANGE(5),
 223                 UNI_RANGE(2.5),
 224                 UNI_RANGE(1.25),
 225                 UNI_RANGE(0.625)
 226         }
 227 };
 228 
 229 static const struct comedi_lrange range_iso813_2_ai = {
 230         4, {
 231                 BIP_RANGE(5),
 232                 BIP_RANGE(2.5),
 233                 BIP_RANGE(1.25),
 234                 BIP_RANGE(0.625)
 235         }
 236 };
 237 
 238 static const struct comedi_lrange range_iso813_2_2_ai = {
 239         4, {
 240                 UNI_RANGE(10),
 241                 UNI_RANGE(5),
 242                 UNI_RANGE(2.5),
 243                 UNI_RANGE(1.25)
 244         }
 245 };
 246 
 247 static const struct comedi_lrange range_acl8113_1_ai = {
 248         4, {
 249                 BIP_RANGE(5),
 250                 BIP_RANGE(2.5),
 251                 BIP_RANGE(1.25),
 252                 BIP_RANGE(0.625)
 253         }
 254 };
 255 
 256 static const struct comedi_lrange range_acl8113_1_2_ai = {
 257         4, {
 258                 UNI_RANGE(10),
 259                 UNI_RANGE(5),
 260                 UNI_RANGE(2.5),
 261                 UNI_RANGE(1.25)
 262         }
 263 };
 264 
 265 static const struct comedi_lrange range_acl8113_2_ai = {
 266         3, {
 267                 BIP_RANGE(5),
 268                 BIP_RANGE(2.5),
 269                 BIP_RANGE(1.25)
 270         }
 271 };
 272 
 273 static const struct comedi_lrange range_acl8113_2_2_ai = {
 274         3, {
 275                 UNI_RANGE(10),
 276                 UNI_RANGE(5),
 277                 UNI_RANGE(2.5)
 278         }
 279 };
 280 
 281 static const struct comedi_lrange range_acl8112dg_ai = {
 282         9, {
 283                 BIP_RANGE(5),
 284                 BIP_RANGE(2.5),
 285                 BIP_RANGE(1.25),
 286                 BIP_RANGE(0.625),
 287                 UNI_RANGE(10),
 288                 UNI_RANGE(5),
 289                 UNI_RANGE(2.5),
 290                 UNI_RANGE(1.25),
 291                 BIP_RANGE(10)
 292         }
 293 };
 294 
 295 static const struct comedi_lrange range_acl8112hg_ai = {
 296         12, {
 297                 BIP_RANGE(5),
 298                 BIP_RANGE(0.5),
 299                 BIP_RANGE(0.05),
 300                 BIP_RANGE(0.005),
 301                 UNI_RANGE(10),
 302                 UNI_RANGE(1),
 303                 UNI_RANGE(0.1),
 304                 UNI_RANGE(0.01),
 305                 BIP_RANGE(10),
 306                 BIP_RANGE(1),
 307                 BIP_RANGE(0.1),
 308                 BIP_RANGE(0.01)
 309         }
 310 };
 311 
 312 static const struct comedi_lrange range_a821pgh_ai = {
 313         4, {
 314                 BIP_RANGE(5),
 315                 BIP_RANGE(0.5),
 316                 BIP_RANGE(0.05),
 317                 BIP_RANGE(0.005)
 318         }
 319 };
 320 
 321 enum pcl812_boardtype {
 322         BOARD_PCL812PG  = 0,    /* and ACL-8112PG */
 323         BOARD_PCL813B   = 1,
 324         BOARD_PCL812    = 2,
 325         BOARD_PCL813    = 3,
 326         BOARD_ISO813    = 5,
 327         BOARD_ACL8113   = 6,
 328         BOARD_ACL8112   = 7,    /* ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH */
 329         BOARD_ACL8216   = 8,    /* and ICP DAS A-826PG */
 330         BOARD_A821      = 9,    /* PGH, PGL, PGL/NDA versions */
 331 };
 332 
 333 struct pcl812_board {
 334         const char *name;
 335         enum pcl812_boardtype board_type;
 336         int n_aichan;
 337         int n_aochan;
 338         unsigned int ai_ns_min;
 339         const struct comedi_lrange *rangelist_ai;
 340         unsigned int irq_bits;
 341         unsigned int has_dma:1;
 342         unsigned int has_16bit_ai:1;
 343         unsigned int has_mpc508_mux:1;
 344         unsigned int has_dio:1;
 345 };
 346 
 347 static const struct pcl812_board boardtypes[] = {
 348         {
 349                 .name           = "pcl812",
 350                 .board_type     = BOARD_PCL812,
 351                 .n_aichan       = 16,
 352                 .n_aochan       = 2,
 353                 .ai_ns_min      = 33000,
 354                 .rangelist_ai   = &range_bipolar10,
 355                 .irq_bits       = 0xdcfc,
 356                 .has_dma        = 1,
 357                 .has_dio        = 1,
 358         }, {
 359                 .name           = "pcl812pg",
 360                 .board_type     = BOARD_PCL812PG,
 361                 .n_aichan       = 16,
 362                 .n_aochan       = 2,
 363                 .ai_ns_min      = 33000,
 364                 .rangelist_ai   = &range_pcl812pg_ai,
 365                 .irq_bits       = 0xdcfc,
 366                 .has_dma        = 1,
 367                 .has_dio        = 1,
 368         }, {
 369                 .name           = "acl8112pg",
 370                 .board_type     = BOARD_PCL812PG,
 371                 .n_aichan       = 16,
 372                 .n_aochan       = 2,
 373                 .ai_ns_min      = 10000,
 374                 .rangelist_ai   = &range_pcl812pg_ai,
 375                 .irq_bits       = 0xdcfc,
 376                 .has_dma        = 1,
 377                 .has_dio        = 1,
 378         }, {
 379                 .name           = "acl8112dg",
 380                 .board_type     = BOARD_ACL8112,
 381                 .n_aichan       = 16,   /* 8 differential */
 382                 .n_aochan       = 2,
 383                 .ai_ns_min      = 10000,
 384                 .rangelist_ai   = &range_acl8112dg_ai,
 385                 .irq_bits       = 0xdcfc,
 386                 .has_dma        = 1,
 387                 .has_mpc508_mux = 1,
 388                 .has_dio        = 1,
 389         }, {
 390                 .name           = "acl8112hg",
 391                 .board_type     = BOARD_ACL8112,
 392                 .n_aichan       = 16,   /* 8 differential */
 393                 .n_aochan       = 2,
 394                 .ai_ns_min      = 10000,
 395                 .rangelist_ai   = &range_acl8112hg_ai,
 396                 .irq_bits       = 0xdcfc,
 397                 .has_dma        = 1,
 398                 .has_mpc508_mux = 1,
 399                 .has_dio        = 1,
 400         }, {
 401                 .name           = "a821pgl",
 402                 .board_type     = BOARD_A821,
 403                 .n_aichan       = 16,   /* 8 differential */
 404                 .n_aochan       = 1,
 405                 .ai_ns_min      = 10000,
 406                 .rangelist_ai   = &range_pcl813b_ai,
 407                 .irq_bits       = 0x000c,
 408                 .has_dio        = 1,
 409         }, {
 410                 .name           = "a821pglnda",
 411                 .board_type     = BOARD_A821,
 412                 .n_aichan       = 16,   /* 8 differential */
 413                 .ai_ns_min      = 10000,
 414                 .rangelist_ai   = &range_pcl813b_ai,
 415                 .irq_bits       = 0x000c,
 416         }, {
 417                 .name           = "a821pgh",
 418                 .board_type     = BOARD_A821,
 419                 .n_aichan       = 16,   /* 8 differential */
 420                 .n_aochan       = 1,
 421                 .ai_ns_min      = 10000,
 422                 .rangelist_ai   = &range_a821pgh_ai,
 423                 .irq_bits       = 0x000c,
 424                 .has_dio        = 1,
 425         }, {
 426                 .name           = "a822pgl",
 427                 .board_type     = BOARD_ACL8112,
 428                 .n_aichan       = 16,   /* 8 differential */
 429                 .n_aochan       = 2,
 430                 .ai_ns_min      = 10000,
 431                 .rangelist_ai   = &range_acl8112dg_ai,
 432                 .irq_bits       = 0xdcfc,
 433                 .has_dma        = 1,
 434                 .has_dio        = 1,
 435         }, {
 436                 .name           = "a822pgh",
 437                 .board_type     = BOARD_ACL8112,
 438                 .n_aichan       = 16,   /* 8 differential */
 439                 .n_aochan       = 2,
 440                 .ai_ns_min      = 10000,
 441                 .rangelist_ai   = &range_acl8112hg_ai,
 442                 .irq_bits       = 0xdcfc,
 443                 .has_dma        = 1,
 444                 .has_dio        = 1,
 445         }, {
 446                 .name           = "a823pgl",
 447                 .board_type     = BOARD_ACL8112,
 448                 .n_aichan       = 16,   /* 8 differential */
 449                 .n_aochan       = 2,
 450                 .ai_ns_min      = 8000,
 451                 .rangelist_ai   = &range_acl8112dg_ai,
 452                 .irq_bits       = 0xdcfc,
 453                 .has_dma        = 1,
 454                 .has_dio        = 1,
 455         }, {
 456                 .name           = "a823pgh",
 457                 .board_type     = BOARD_ACL8112,
 458                 .n_aichan       = 16,   /* 8 differential */
 459                 .n_aochan       = 2,
 460                 .ai_ns_min      = 8000,
 461                 .rangelist_ai   = &range_acl8112hg_ai,
 462                 .irq_bits       = 0xdcfc,
 463                 .has_dma        = 1,
 464                 .has_dio        = 1,
 465         }, {
 466                 .name           = "pcl813",
 467                 .board_type     = BOARD_PCL813,
 468                 .n_aichan       = 32,
 469                 .rangelist_ai   = &range_pcl813b_ai,
 470         }, {
 471                 .name           = "pcl813b",
 472                 .board_type     = BOARD_PCL813B,
 473                 .n_aichan       = 32,
 474                 .rangelist_ai   = &range_pcl813b_ai,
 475         }, {
 476                 .name           = "acl8113",
 477                 .board_type     = BOARD_ACL8113,
 478                 .n_aichan       = 32,
 479                 .rangelist_ai   = &range_acl8113_1_ai,
 480         }, {
 481                 .name           = "iso813",
 482                 .board_type     = BOARD_ISO813,
 483                 .n_aichan       = 32,
 484                 .rangelist_ai   = &range_iso813_1_ai,
 485         }, {
 486                 .name           = "acl8216",
 487                 .board_type     = BOARD_ACL8216,
 488                 .n_aichan       = 16,   /* 8 differential */
 489                 .n_aochan       = 2,
 490                 .ai_ns_min      = 10000,
 491                 .rangelist_ai   = &range_pcl813b2_ai,
 492                 .irq_bits       = 0xdcfc,
 493                 .has_dma        = 1,
 494                 .has_16bit_ai   = 1,
 495                 .has_mpc508_mux = 1,
 496                 .has_dio        = 1,
 497         }, {
 498                 .name           = "a826pg",
 499                 .board_type     = BOARD_ACL8216,
 500                 .n_aichan       = 16,   /* 8 differential */
 501                 .n_aochan       = 2,
 502                 .ai_ns_min      = 10000,
 503                 .rangelist_ai   = &range_pcl813b2_ai,
 504                 .irq_bits       = 0xdcfc,
 505                 .has_dma        = 1,
 506                 .has_16bit_ai   = 1,
 507                 .has_dio        = 1,
 508         },
 509 };
 510 
 511 struct pcl812_private {
 512         struct comedi_isadma *dma;
 513         unsigned char range_correction; /* =1 we must add 1 to range number */
 514         unsigned int last_ai_chanspec;
 515         unsigned char mode_reg_int; /* stored INT number for some cards */
 516         unsigned int ai_poll_ptr; /* how many samples transfer poll */
 517         unsigned int max_812_ai_mode0_rangewait; /* settling time for gain */
 518         unsigned int use_diff:1;
 519         unsigned int use_mpc508:1;
 520         unsigned int use_ext_trg:1;
 521         unsigned int ai_dma:1;
 522         unsigned int ai_eos:1;
 523 };
 524 
 525 static void pcl812_ai_setup_dma(struct comedi_device *dev,
 526                                 struct comedi_subdevice *s,
 527                                 unsigned int unread_samples)
 528 {
 529         struct pcl812_private *devpriv = dev->private;
 530         struct comedi_isadma *dma = devpriv->dma;
 531         struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
 532         unsigned int bytes;
 533         unsigned int max_samples;
 534         unsigned int nsamples;
 535 
 536         comedi_isadma_disable(dma->chan);
 537 
 538         /* if using EOS, adapt DMA buffer to one scan */
 539         bytes = devpriv->ai_eos ? comedi_bytes_per_scan(s) : desc->maxsize;
 540         max_samples = comedi_bytes_to_samples(s, bytes);
 541 
 542         /*
 543          * Determine dma size based on the buffer size plus the number of
 544          * unread samples and the number of samples remaining in the command.
 545          */
 546         nsamples = comedi_nsamples_left(s, max_samples + unread_samples);
 547         if (nsamples > unread_samples) {
 548                 nsamples -= unread_samples;
 549                 desc->size = comedi_samples_to_bytes(s, nsamples);
 550                 comedi_isadma_program(desc);
 551         }
 552 }
 553 
 554 static void pcl812_ai_set_chan_range(struct comedi_device *dev,
 555                                      unsigned int chanspec, char wait)
 556 {
 557         struct pcl812_private *devpriv = dev->private;
 558         unsigned int chan = CR_CHAN(chanspec);
 559         unsigned int range = CR_RANGE(chanspec);
 560         unsigned int mux = 0;
 561 
 562         if (chanspec == devpriv->last_ai_chanspec)
 563                 return;
 564 
 565         devpriv->last_ai_chanspec = chanspec;
 566 
 567         if (devpriv->use_mpc508) {
 568                 if (devpriv->use_diff) {
 569                         mux |= PCL812_MUX_CS0 | PCL812_MUX_CS1;
 570                 } else {
 571                         if (chan < 8)
 572                                 mux |= PCL812_MUX_CS0;
 573                         else
 574                                 mux |= PCL812_MUX_CS1;
 575                 }
 576         }
 577 
 578         outb(mux | PCL812_MUX_CHAN(chan), dev->iobase + PCL812_MUX_REG);
 579         outb(range + devpriv->range_correction, dev->iobase + PCL812_RANGE_REG);
 580 
 581         if (wait)
 582                 /*
 583                  * XXX this depends on selected range and can be very long for
 584                  * some high gain ranges!
 585                  */
 586                 udelay(devpriv->max_812_ai_mode0_rangewait);
 587 }
 588 
 589 static void pcl812_ai_clear_eoc(struct comedi_device *dev)
 590 {
 591         /* writing any value clears the interrupt request */
 592         outb(0, dev->iobase + PCL812_STATUS_REG);
 593 }
 594 
 595 static void pcl812_ai_soft_trig(struct comedi_device *dev)
 596 {
 597         /* writing any value triggers a software conversion */
 598         outb(255, dev->iobase + PCL812_SOFTTRIG_REG);
 599 }
 600 
 601 static unsigned int pcl812_ai_get_sample(struct comedi_device *dev,
 602                                          struct comedi_subdevice *s)
 603 {
 604         unsigned int val;
 605 
 606         val = inb(dev->iobase + PCL812_AI_MSB_REG) << 8;
 607         val |= inb(dev->iobase + PCL812_AI_LSB_REG);
 608 
 609         return val & s->maxdata;
 610 }
 611 
 612 static int pcl812_ai_eoc(struct comedi_device *dev,
 613                          struct comedi_subdevice *s,
 614                          struct comedi_insn *insn,
 615                          unsigned long context)
 616 {
 617         unsigned int status;
 618 
 619         if (s->maxdata > 0x0fff) {
 620                 status = inb(dev->iobase + PCL812_STATUS_REG);
 621                 if ((status & PCL812_STATUS_DRDY) == 0)
 622                         return 0;
 623         } else {
 624                 status = inb(dev->iobase + PCL812_AI_MSB_REG);
 625                 if ((status & PCL812_AI_MSB_DRDY) == 0)
 626                         return 0;
 627         }
 628         return -EBUSY;
 629 }
 630 
 631 static int pcl812_ai_cmdtest(struct comedi_device *dev,
 632                              struct comedi_subdevice *s, struct comedi_cmd *cmd)
 633 {
 634         const struct pcl812_board *board = dev->board_ptr;
 635         struct pcl812_private *devpriv = dev->private;
 636         int err = 0;
 637         unsigned int flags;
 638 
 639         /* Step 1 : check if triggers are trivially valid */
 640 
 641         err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
 642         err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
 643 
 644         if (devpriv->use_ext_trg)
 645                 flags = TRIG_EXT;
 646         else
 647                 flags = TRIG_TIMER;
 648         err |= comedi_check_trigger_src(&cmd->convert_src, flags);
 649 
 650         err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 651         err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
 652 
 653         if (err)
 654                 return 1;
 655 
 656         /* Step 2a : make sure trigger sources are unique */
 657 
 658         err |= comedi_check_trigger_is_unique(cmd->stop_src);
 659 
 660         /* Step 2b : and mutually compatible */
 661 
 662         if (err)
 663                 return 2;
 664 
 665         /* Step 3: check if arguments are trivially valid */
 666 
 667         err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
 668         err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 669 
 670         if (cmd->convert_src == TRIG_TIMER) {
 671                 err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
 672                                                     board->ai_ns_min);
 673         } else {        /* TRIG_EXT */
 674                 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
 675         }
 676 
 677         err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1);
 678         err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
 679                                            cmd->chanlist_len);
 680 
 681         if (cmd->stop_src == TRIG_COUNT)
 682                 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
 683         else    /* TRIG_NONE */
 684                 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
 685 
 686         if (err)
 687                 return 3;
 688 
 689         /* step 4: fix up any arguments */
 690 
 691         if (cmd->convert_src == TRIG_TIMER) {
 692                 unsigned int arg = cmd->convert_arg;
 693 
 694                 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
 695                 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
 696         }
 697 
 698         if (err)
 699                 return 4;
 700 
 701         return 0;
 702 }
 703 
 704 static int pcl812_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 705 {
 706         struct pcl812_private *devpriv = dev->private;
 707         struct comedi_isadma *dma = devpriv->dma;
 708         struct comedi_cmd *cmd = &s->async->cmd;
 709         unsigned int ctrl = 0;
 710         unsigned int i;
 711 
 712         pcl812_ai_set_chan_range(dev, cmd->chanlist[0], 1);
 713 
 714         if (dma) {      /*  check if we can use DMA transfer */
 715                 devpriv->ai_dma = 1;
 716                 for (i = 1; i < cmd->chanlist_len; i++)
 717                         if (cmd->chanlist[0] != cmd->chanlist[i]) {
 718                                 /*  we cann't use DMA :-( */
 719                                 devpriv->ai_dma = 0;
 720                                 break;
 721                         }
 722         } else {
 723                 devpriv->ai_dma = 0;
 724         }
 725 
 726         devpriv->ai_poll_ptr = 0;
 727 
 728         /*  don't we want wake up every scan? */
 729         if (cmd->flags & CMDF_WAKE_EOS) {
 730                 devpriv->ai_eos = 1;
 731 
 732                 /*  DMA is useless for this situation */
 733                 if (cmd->chanlist_len == 1)
 734                         devpriv->ai_dma = 0;
 735         }
 736 
 737         if (devpriv->ai_dma) {
 738                 /* setup and enable dma for the first buffer */
 739                 dma->cur_dma = 0;
 740                 pcl812_ai_setup_dma(dev, s, 0);
 741         }
 742 
 743         switch (cmd->convert_src) {
 744         case TRIG_TIMER:
 745                 comedi_8254_update_divisors(dev->pacer);
 746                 comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
 747                 break;
 748         }
 749 
 750         if (devpriv->ai_dma)
 751                 ctrl |= PCL812_CTRL_PACER_DMA_TRIG;
 752         else
 753                 ctrl |= PCL812_CTRL_PACER_EOC_TRIG;
 754         outb(devpriv->mode_reg_int | ctrl, dev->iobase + PCL812_CTRL_REG);
 755 
 756         return 0;
 757 }
 758 
 759 static bool pcl812_ai_next_chan(struct comedi_device *dev,
 760                                 struct comedi_subdevice *s)
 761 {
 762         struct comedi_cmd *cmd = &s->async->cmd;
 763 
 764         if (cmd->stop_src == TRIG_COUNT &&
 765             s->async->scans_done >= cmd->stop_arg) {
 766                 s->async->events |= COMEDI_CB_EOA;
 767                 return false;
 768         }
 769 
 770         return true;
 771 }
 772 
 773 static void pcl812_handle_eoc(struct comedi_device *dev,
 774                               struct comedi_subdevice *s)
 775 {
 776         struct comedi_cmd *cmd = &s->async->cmd;
 777         unsigned int chan = s->async->cur_chan;
 778         unsigned int next_chan;
 779         unsigned short val;
 780 
 781         if (pcl812_ai_eoc(dev, s, NULL, 0)) {
 782                 dev_dbg(dev->class_dev, "A/D cmd IRQ without DRDY!\n");
 783                 s->async->events |= COMEDI_CB_ERROR;
 784                 return;
 785         }
 786 
 787         val = pcl812_ai_get_sample(dev, s);
 788         comedi_buf_write_samples(s, &val, 1);
 789 
 790         /* Set up next channel. Added by abbotti 2010-01-20, but untested. */
 791         next_chan = s->async->cur_chan;
 792         if (cmd->chanlist[chan] != cmd->chanlist[next_chan])
 793                 pcl812_ai_set_chan_range(dev, cmd->chanlist[next_chan], 0);
 794 
 795         pcl812_ai_next_chan(dev, s);
 796 }
 797 
 798 static void transfer_from_dma_buf(struct comedi_device *dev,
 799                                   struct comedi_subdevice *s,
 800                                   unsigned short *ptr,
 801                                   unsigned int bufptr, unsigned int len)
 802 {
 803         unsigned int i;
 804         unsigned short val;
 805 
 806         for (i = len; i; i--) {
 807                 val = ptr[bufptr++];
 808                 comedi_buf_write_samples(s, &val, 1);
 809 
 810                 if (!pcl812_ai_next_chan(dev, s))
 811                         break;
 812         }
 813 }
 814 
 815 static void pcl812_handle_dma(struct comedi_device *dev,
 816                               struct comedi_subdevice *s)
 817 {
 818         struct pcl812_private *devpriv = dev->private;
 819         struct comedi_isadma *dma = devpriv->dma;
 820         struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
 821         unsigned int nsamples;
 822         int bufptr;
 823 
 824         nsamples = comedi_bytes_to_samples(s, desc->size) -
 825                    devpriv->ai_poll_ptr;
 826         bufptr = devpriv->ai_poll_ptr;
 827         devpriv->ai_poll_ptr = 0;
 828 
 829         /* restart dma with the next buffer */
 830         dma->cur_dma = 1 - dma->cur_dma;
 831         pcl812_ai_setup_dma(dev, s, nsamples);
 832 
 833         transfer_from_dma_buf(dev, s, desc->virt_addr, bufptr, nsamples);
 834 }
 835 
 836 static irqreturn_t pcl812_interrupt(int irq, void *d)
 837 {
 838         struct comedi_device *dev = d;
 839         struct comedi_subdevice *s = dev->read_subdev;
 840         struct pcl812_private *devpriv = dev->private;
 841 
 842         if (!dev->attached) {
 843                 pcl812_ai_clear_eoc(dev);
 844                 return IRQ_HANDLED;
 845         }
 846 
 847         if (devpriv->ai_dma)
 848                 pcl812_handle_dma(dev, s);
 849         else
 850                 pcl812_handle_eoc(dev, s);
 851 
 852         pcl812_ai_clear_eoc(dev);
 853 
 854         comedi_handle_events(dev, s);
 855         return IRQ_HANDLED;
 856 }
 857 
 858 static int pcl812_ai_poll(struct comedi_device *dev, struct comedi_subdevice *s)
 859 {
 860         struct pcl812_private *devpriv = dev->private;
 861         struct comedi_isadma *dma = devpriv->dma;
 862         struct comedi_isadma_desc *desc;
 863         unsigned long flags;
 864         unsigned int poll;
 865         int ret;
 866 
 867         /* poll is valid only for DMA transfer */
 868         if (!devpriv->ai_dma)
 869                 return 0;
 870 
 871         spin_lock_irqsave(&dev->spinlock, flags);
 872 
 873         poll = comedi_isadma_poll(dma);
 874         poll = comedi_bytes_to_samples(s, poll);
 875         if (poll > devpriv->ai_poll_ptr) {
 876                 desc = &dma->desc[dma->cur_dma];
 877                 transfer_from_dma_buf(dev, s, desc->virt_addr,
 878                                       devpriv->ai_poll_ptr,
 879                                       poll - devpriv->ai_poll_ptr);
 880                 /* new buffer position */
 881                 devpriv->ai_poll_ptr = poll;
 882 
 883                 ret = comedi_buf_n_bytes_ready(s);
 884         } else {
 885                 /* no new samples */
 886                 ret = 0;
 887         }
 888 
 889         spin_unlock_irqrestore(&dev->spinlock, flags);
 890 
 891         return ret;
 892 }
 893 
 894 static int pcl812_ai_cancel(struct comedi_device *dev,
 895                             struct comedi_subdevice *s)
 896 {
 897         struct pcl812_private *devpriv = dev->private;
 898 
 899         if (devpriv->ai_dma)
 900                 comedi_isadma_disable(devpriv->dma->chan);
 901 
 902         outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
 903              dev->iobase + PCL812_CTRL_REG);
 904         comedi_8254_pacer_enable(dev->pacer, 1, 2, false);
 905         pcl812_ai_clear_eoc(dev);
 906         return 0;
 907 }
 908 
 909 static int pcl812_ai_insn_read(struct comedi_device *dev,
 910                                struct comedi_subdevice *s,
 911                                struct comedi_insn *insn,
 912                                unsigned int *data)
 913 {
 914         struct pcl812_private *devpriv = dev->private;
 915         int ret = 0;
 916         int i;
 917 
 918         outb(devpriv->mode_reg_int | PCL812_CTRL_SOFT_TRIG,
 919              dev->iobase + PCL812_CTRL_REG);
 920 
 921         pcl812_ai_set_chan_range(dev, insn->chanspec, 1);
 922 
 923         for (i = 0; i < insn->n; i++) {
 924                 pcl812_ai_clear_eoc(dev);
 925                 pcl812_ai_soft_trig(dev);
 926 
 927                 ret = comedi_timeout(dev, s, insn, pcl812_ai_eoc, 0);
 928                 if (ret)
 929                         break;
 930 
 931                 data[i] = pcl812_ai_get_sample(dev, s);
 932         }
 933         outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
 934              dev->iobase + PCL812_CTRL_REG);
 935         pcl812_ai_clear_eoc(dev);
 936 
 937         return ret ? ret : insn->n;
 938 }
 939 
 940 static int pcl812_ao_insn_write(struct comedi_device *dev,
 941                                 struct comedi_subdevice *s,
 942                                 struct comedi_insn *insn,
 943                                 unsigned int *data)
 944 {
 945         unsigned int chan = CR_CHAN(insn->chanspec);
 946         unsigned int val = s->readback[chan];
 947         int i;
 948 
 949         for (i = 0; i < insn->n; i++) {
 950                 val = data[i];
 951                 outb(val & 0xff, dev->iobase + PCL812_AO_LSB_REG(chan));
 952                 outb((val >> 8) & 0x0f, dev->iobase + PCL812_AO_MSB_REG(chan));
 953         }
 954         s->readback[chan] = val;
 955 
 956         return insn->n;
 957 }
 958 
 959 static int pcl812_di_insn_bits(struct comedi_device *dev,
 960                                struct comedi_subdevice *s,
 961                                struct comedi_insn *insn,
 962                                unsigned int *data)
 963 {
 964         data[1] = inb(dev->iobase + PCL812_DI_LSB_REG) |
 965                   (inb(dev->iobase + PCL812_DI_MSB_REG) << 8);
 966 
 967         return insn->n;
 968 }
 969 
 970 static int pcl812_do_insn_bits(struct comedi_device *dev,
 971                                struct comedi_subdevice *s,
 972                                struct comedi_insn *insn,
 973                                unsigned int *data)
 974 {
 975         if (comedi_dio_update_state(s, data)) {
 976                 outb(s->state & 0xff, dev->iobase + PCL812_DO_LSB_REG);
 977                 outb((s->state >> 8), dev->iobase + PCL812_DO_MSB_REG);
 978         }
 979 
 980         data[1] = s->state;
 981 
 982         return insn->n;
 983 }
 984 
 985 static void pcl812_reset(struct comedi_device *dev)
 986 {
 987         const struct pcl812_board *board = dev->board_ptr;
 988         struct pcl812_private *devpriv = dev->private;
 989         unsigned int chan;
 990 
 991         /* disable analog input trigger */
 992         outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
 993              dev->iobase + PCL812_CTRL_REG);
 994         pcl812_ai_clear_eoc(dev);
 995 
 996         /*
 997          * Invalidate last_ai_chanspec then set analog input to
 998          * known channel/range.
 999          */
1000         devpriv->last_ai_chanspec = CR_PACK(16, 0, 0);
1001         pcl812_ai_set_chan_range(dev, CR_PACK(0, 0, 0), 0);
1002 
1003         /* set analog output channels to 0V */
1004         for (chan = 0; chan < board->n_aochan; chan++) {
1005                 outb(0, dev->iobase + PCL812_AO_LSB_REG(chan));
1006                 outb(0, dev->iobase + PCL812_AO_MSB_REG(chan));
1007         }
1008 
1009         /* set all digital outputs low */
1010         if (board->has_dio) {
1011                 outb(0, dev->iobase + PCL812_DO_MSB_REG);
1012                 outb(0, dev->iobase + PCL812_DO_LSB_REG);
1013         }
1014 }
1015 
1016 static void pcl812_set_ai_range_table(struct comedi_device *dev,
1017                                       struct comedi_subdevice *s,
1018                                       struct comedi_devconfig *it)
1019 {
1020         const struct pcl812_board *board = dev->board_ptr;
1021         struct pcl812_private *devpriv = dev->private;
1022 
1023         switch (board->board_type) {
1024         case BOARD_PCL812PG:
1025                 if (it->options[4] == 1)
1026                         s->range_table = &range_pcl812pg2_ai;
1027                 else
1028                         s->range_table = board->rangelist_ai;
1029                 break;
1030         case BOARD_PCL812:
1031                 switch (it->options[4]) {
1032                 case 0:
1033                         s->range_table = &range_bipolar10;
1034                         break;
1035                 case 1:
1036                         s->range_table = &range_bipolar5;
1037                         break;
1038                 case 2:
1039                         s->range_table = &range_bipolar2_5;
1040                         break;
1041                 case 3:
1042                         s->range_table = &range812_bipolar1_25;
1043                         break;
1044                 case 4:
1045                         s->range_table = &range812_bipolar0_625;
1046                         break;
1047                 case 5:
1048                         s->range_table = &range812_bipolar0_3125;
1049                         break;
1050                 default:
1051                         s->range_table = &range_bipolar10;
1052                         break;
1053                 }
1054                 break;
1055         case BOARD_PCL813B:
1056                 if (it->options[1] == 1)
1057                         s->range_table = &range_pcl813b2_ai;
1058                 else
1059                         s->range_table = board->rangelist_ai;
1060                 break;
1061         case BOARD_ISO813:
1062                 switch (it->options[1]) {
1063                 case 0:
1064                         s->range_table = &range_iso813_1_ai;
1065                         break;
1066                 case 1:
1067                         s->range_table = &range_iso813_1_2_ai;
1068                         break;
1069                 case 2:
1070                         s->range_table = &range_iso813_2_ai;
1071                         devpriv->range_correction = 1;
1072                         break;
1073                 case 3:
1074                         s->range_table = &range_iso813_2_2_ai;
1075                         devpriv->range_correction = 1;
1076                         break;
1077                 default:
1078                         s->range_table = &range_iso813_1_ai;
1079                         break;
1080                 }
1081                 break;
1082         case BOARD_ACL8113:
1083                 switch (it->options[1]) {
1084                 case 0:
1085                         s->range_table = &range_acl8113_1_ai;
1086                         break;
1087                 case 1:
1088                         s->range_table = &range_acl8113_1_2_ai;
1089                         break;
1090                 case 2:
1091                         s->range_table = &range_acl8113_2_ai;
1092                         devpriv->range_correction = 1;
1093                         break;
1094                 case 3:
1095                         s->range_table = &range_acl8113_2_2_ai;
1096                         devpriv->range_correction = 1;
1097                         break;
1098                 default:
1099                         s->range_table = &range_acl8113_1_ai;
1100                         break;
1101                 }
1102                 break;
1103         default:
1104                 s->range_table = board->rangelist_ai;
1105                 break;
1106         }
1107 }
1108 
1109 static void pcl812_alloc_dma(struct comedi_device *dev, unsigned int dma_chan)
1110 {
1111         struct pcl812_private *devpriv = dev->private;
1112 
1113         /* only DMA channels 3 and 1 are valid */
1114         if (!(dma_chan == 3 || dma_chan == 1))
1115                 return;
1116 
1117         /* DMA uses two 8K buffers */
1118         devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan,
1119                                            PAGE_SIZE * 2, COMEDI_ISADMA_READ);
1120 }
1121 
1122 static void pcl812_free_dma(struct comedi_device *dev)
1123 {
1124         struct pcl812_private *devpriv = dev->private;
1125 
1126         if (devpriv)
1127                 comedi_isadma_free(devpriv->dma);
1128 }
1129 
1130 static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1131 {
1132         const struct pcl812_board *board = dev->board_ptr;
1133         struct pcl812_private *devpriv;
1134         struct comedi_subdevice *s;
1135         int n_subdevices;
1136         int subdev;
1137         int ret;
1138 
1139         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1140         if (!devpriv)
1141                 return -ENOMEM;
1142 
1143         ret = comedi_request_region(dev, it->options[0], 0x10);
1144         if (ret)
1145                 return ret;
1146 
1147         if (board->irq_bits) {
1148                 dev->pacer = comedi_8254_init(dev->iobase + PCL812_TIMER_BASE,
1149                                               I8254_OSC_BASE_2MHZ,
1150                                               I8254_IO8, 0);
1151                 if (!dev->pacer)
1152                         return -ENOMEM;
1153 
1154                 if ((1 << it->options[1]) & board->irq_bits) {
1155                         ret = request_irq(it->options[1], pcl812_interrupt, 0,
1156                                           dev->board_name, dev);
1157                         if (ret == 0)
1158                                 dev->irq = it->options[1];
1159                 }
1160         }
1161 
1162         /* we need an IRQ to do DMA on channel 3 or 1 */
1163         if (dev->irq && board->has_dma)
1164                 pcl812_alloc_dma(dev, it->options[2]);
1165 
1166         /* differential analog inputs? */
1167         switch (board->board_type) {
1168         case BOARD_A821:
1169                 if (it->options[2] == 1)
1170                         devpriv->use_diff = 1;
1171                 break;
1172         case BOARD_ACL8112:
1173         case BOARD_ACL8216:
1174                 if (it->options[4] == 1)
1175                         devpriv->use_diff = 1;
1176                 break;
1177         default:
1178                 break;
1179         }
1180 
1181         n_subdevices = 1;               /* all boardtypes have analog inputs */
1182         if (board->n_aochan > 0)
1183                 n_subdevices++;
1184         if (board->has_dio)
1185                 n_subdevices += 2;
1186 
1187         ret = comedi_alloc_subdevices(dev, n_subdevices);
1188         if (ret)
1189                 return ret;
1190 
1191         subdev = 0;
1192 
1193         /* Analog Input subdevice */
1194         s = &dev->subdevices[subdev];
1195         s->type         = COMEDI_SUBD_AI;
1196         s->subdev_flags = SDF_READABLE;
1197         if (devpriv->use_diff) {
1198                 s->subdev_flags |= SDF_DIFF;
1199                 s->n_chan       = board->n_aichan / 2;
1200         } else {
1201                 s->subdev_flags |= SDF_GROUND;
1202                 s->n_chan       = board->n_aichan;
1203         }
1204         s->maxdata      = board->has_16bit_ai ? 0xffff : 0x0fff;
1205 
1206         pcl812_set_ai_range_table(dev, s, it);
1207 
1208         s->insn_read    = pcl812_ai_insn_read;
1209 
1210         if (dev->irq) {
1211                 dev->read_subdev = s;
1212                 s->subdev_flags |= SDF_CMD_READ;
1213                 s->len_chanlist = MAX_CHANLIST_LEN;
1214                 s->do_cmdtest   = pcl812_ai_cmdtest;
1215                 s->do_cmd       = pcl812_ai_cmd;
1216                 s->poll         = pcl812_ai_poll;
1217                 s->cancel       = pcl812_ai_cancel;
1218         }
1219 
1220         devpriv->use_mpc508 = board->has_mpc508_mux;
1221 
1222         subdev++;
1223 
1224         /* analog output */
1225         if (board->n_aochan > 0) {
1226                 s = &dev->subdevices[subdev];
1227                 s->type         = COMEDI_SUBD_AO;
1228                 s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
1229                 s->n_chan       = board->n_aochan;
1230                 s->maxdata      = 0xfff;
1231                 switch (board->board_type) {
1232                 case BOARD_A821:
1233                         if (it->options[3] == 1)
1234                                 s->range_table = &range_unipolar10;
1235                         else
1236                                 s->range_table = &range_unipolar5;
1237                         break;
1238                 case BOARD_PCL812:
1239                 case BOARD_ACL8112:
1240                 case BOARD_PCL812PG:
1241                 case BOARD_ACL8216:
1242                         switch (it->options[5]) {
1243                         case 1:
1244                                 s->range_table = &range_unipolar10;
1245                                 break;
1246                         case 2:
1247                                 s->range_table = &range_unknown;
1248                                 break;
1249                         default:
1250                                 s->range_table = &range_unipolar5;
1251                                 break;
1252                         }
1253                         break;
1254                 default:
1255                         s->range_table = &range_unipolar5;
1256                         break;
1257                 }
1258                 s->insn_write   = pcl812_ao_insn_write;
1259 
1260                 ret = comedi_alloc_subdev_readback(s);
1261                 if (ret)
1262                         return ret;
1263 
1264                 subdev++;
1265         }
1266 
1267         if (board->has_dio) {
1268                 /* Digital Input subdevice */
1269                 s = &dev->subdevices[subdev];
1270                 s->type         = COMEDI_SUBD_DI;
1271                 s->subdev_flags = SDF_READABLE;
1272                 s->n_chan       = 16;
1273                 s->maxdata      = 1;
1274                 s->range_table  = &range_digital;
1275                 s->insn_bits    = pcl812_di_insn_bits;
1276                 subdev++;
1277 
1278                 /* Digital Output subdevice */
1279                 s = &dev->subdevices[subdev];
1280                 s->type         = COMEDI_SUBD_DO;
1281                 s->subdev_flags = SDF_WRITABLE;
1282                 s->n_chan       = 16;
1283                 s->maxdata      = 1;
1284                 s->range_table  = &range_digital;
1285                 s->insn_bits    = pcl812_do_insn_bits;
1286                 subdev++;
1287         }
1288 
1289         switch (board->board_type) {
1290         case BOARD_ACL8216:
1291         case BOARD_PCL812PG:
1292         case BOARD_PCL812:
1293         case BOARD_ACL8112:
1294                 devpriv->max_812_ai_mode0_rangewait = 1;
1295                 if (it->options[3] > 0)
1296                                                 /*  we use external trigger */
1297                         devpriv->use_ext_trg = 1;
1298                 break;
1299         case BOARD_A821:
1300                 devpriv->max_812_ai_mode0_rangewait = 1;
1301                 devpriv->mode_reg_int = (dev->irq << 4) & 0xf0;
1302                 break;
1303         case BOARD_PCL813B:
1304         case BOARD_PCL813:
1305         case BOARD_ISO813:
1306         case BOARD_ACL8113:
1307                 /* maybe there must by greatest timeout */
1308                 devpriv->max_812_ai_mode0_rangewait = 5;
1309                 break;
1310         }
1311 
1312         pcl812_reset(dev);
1313 
1314         return 0;
1315 }
1316 
1317 static void pcl812_detach(struct comedi_device *dev)
1318 {
1319         pcl812_free_dma(dev);
1320         comedi_legacy_detach(dev);
1321 }
1322 
1323 static struct comedi_driver pcl812_driver = {
1324         .driver_name    = "pcl812",
1325         .module         = THIS_MODULE,
1326         .attach         = pcl812_attach,
1327         .detach         = pcl812_detach,
1328         .board_name     = &boardtypes[0].name,
1329         .num_names      = ARRAY_SIZE(boardtypes),
1330         .offset         = sizeof(struct pcl812_board),
1331 };
1332 module_comedi_driver(pcl812_driver);
1333 
1334 MODULE_AUTHOR("Comedi http://www.comedi.org");
1335 MODULE_DESCRIPTION("Comedi low-level driver");
1336 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/staging/comedi/drivers/pcl812.c

DEFINITIONS
