LXR linux/drivers/staging/comedi/drivers/adv

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * adv_pci1710.c
   4 * Comedi driver for Advantech PCI-1710 series boards
   5 * Author: Michal Dobes <dobes@tesnet.cz>
   6 *
   7 * Thanks to ZhenGang Shang <ZhenGang.Shang@Advantech.com.cn>
   8 * for testing and information.
   9 */
  10
  11/*
  12 * Driver: adv_pci1710
  13 * Description: Comedi driver for Advantech PCI-1710 series boards
  14 * Devices: [Advantech] PCI-1710 (adv_pci1710), PCI-1710HG, PCI-1711,
  15 *   PCI-1713, PCI-1731
  16 * Author: Michal Dobes <dobes@tesnet.cz>
  17 * Updated: Fri, 29 Oct 2015 17:19:35 -0700
  18 * Status: works
  19 *
  20 * Configuration options: not applicable, uses PCI auto config
  21 *
  22 * This driver supports AI, AO, DI and DO subdevices.
  23 * AI subdevice supports cmd and insn interface,
  24 * other subdevices support only insn interface.
  25 *
  26 * The PCI-1710 and PCI-1710HG have the same PCI device ID, so the
  27 * driver cannot distinguish between them, as would be normal for a
  28 * PCI driver.
  29 */
  30
  31#include <linux/module.h>
  32#include <linux/interrupt.h>
  33
  34#include "../comedi_pci.h"
  35
  36#include "comedi_8254.h"
  37#include "amcc_s5933.h"
  38
  39/*
  40 * PCI BAR2 Register map (dev->iobase)
  41 */
  42#define PCI171X_AD_DATA_REG     0x00    /* R:   A/D data */
  43#define PCI171X_SOFTTRG_REG     0x00    /* W:   soft trigger for A/D */
  44#define PCI171X_RANGE_REG       0x02    /* W:   A/D gain/range register */
  45#define PCI171X_RANGE_DIFF      BIT(5)
  46#define PCI171X_RANGE_UNI       BIT(4)
  47#define PCI171X_RANGE_GAIN(x)   (((x) & 0x7) << 0)
  48#define PCI171X_MUX_REG         0x04    /* W:   A/D multiplexor control */
  49#define PCI171X_MUX_CHANH(x)    (((x) & 0xf) << 8)
  50#define PCI171X_MUX_CHANL(x)    (((x) & 0xf) << 0)
  51#define PCI171X_MUX_CHAN(x)     (PCI171X_MUX_CHANH(x) | PCI171X_MUX_CHANL(x))
  52#define PCI171X_STATUS_REG      0x06    /* R:   status register */
  53#define PCI171X_STATUS_IRQ      BIT(11) /* 1=IRQ occurred */
  54#define PCI171X_STATUS_FF       BIT(10) /* 1=FIFO is full, fatal error */
  55#define PCI171X_STATUS_FH       BIT(9)  /* 1=FIFO is half full */
  56#define PCI171X_STATUS_FE       BIT(8)  /* 1=FIFO is empty */
  57#define PCI171X_CTRL_REG        0x06    /* W:   control register */
  58#define PCI171X_CTRL_CNT0       BIT(6)  /* 1=ext. clk, 0=int. 100kHz clk */
  59#define PCI171X_CTRL_ONEFH      BIT(5)  /* 1=on FIFO half full, 0=on sample */
  60#define PCI171X_CTRL_IRQEN      BIT(4)  /* 1=enable IRQ */
  61#define PCI171X_CTRL_GATE       BIT(3)  /* 1=enable ext. trigger GATE (8254?) */
  62#define PCI171X_CTRL_EXT        BIT(2)  /* 1=enable ext. trigger source */
  63#define PCI171X_CTRL_PACER      BIT(1)  /* 1=enable int. 8254 trigger source */
  64#define PCI171X_CTRL_SW         BIT(0)  /* 1=enable software trigger source */
  65#define PCI171X_CLRINT_REG      0x08    /* W:   clear interrupts request */
  66#define PCI171X_CLRFIFO_REG     0x09    /* W:   clear FIFO */
  67#define PCI171X_DA_REG(x)       (0x0a + ((x) * 2)) /* W:   D/A register */
  68#define PCI171X_DAREF_REG       0x0e    /* W:   D/A reference control */
  69#define PCI171X_DAREF(c, r)     (((r) & 0x3) << ((c) * 2))
  70#define PCI171X_DAREF_MASK(c)   PCI171X_DAREF((c), 0x3)
  71#define PCI171X_DI_REG          0x10    /* R:   digital inputs */
  72#define PCI171X_DO_REG          0x10    /* W:   digital outputs */
  73#define PCI171X_TIMER_BASE      0x18    /* R/W: 8254 timer */
  74
  75static const struct comedi_lrange pci1710_ai_range = {
  76        9, {
  77                BIP_RANGE(5),           /* gain 1   (0x00) */
  78                BIP_RANGE(2.5),         /* gain 2   (0x01) */
  79                BIP_RANGE(1.25),        /* gain 4   (0x02) */
  80                BIP_RANGE(0.625),       /* gain 8   (0x03) */
  81                BIP_RANGE(10),          /* gain 0.5 (0x04) */
  82                UNI_RANGE(10),          /* gain 1   (0x00 | UNI) */
  83                UNI_RANGE(5),           /* gain 2   (0x01 | UNI) */
  84                UNI_RANGE(2.5),         /* gain 4   (0x02 | UNI) */
  85                UNI_RANGE(1.25)         /* gain 8   (0x03 | UNI) */
  86        }
  87};
  88
  89static const struct comedi_lrange pci1710hg_ai_range = {
  90        12, {
  91                BIP_RANGE(5),           /* gain 1    (0x00) */
  92                BIP_RANGE(0.5),         /* gain 10   (0x01) */
  93                BIP_RANGE(0.05),        /* gain 100  (0x02) */
  94                BIP_RANGE(0.005),       /* gain 1000 (0x03) */
  95                BIP_RANGE(10),          /* gain 0.5  (0x04) */
  96                BIP_RANGE(1),           /* gain 5    (0x05) */
  97                BIP_RANGE(0.1),         /* gain 50   (0x06) */
  98                BIP_RANGE(0.01),        /* gain 500  (0x07) */
  99                UNI_RANGE(10),          /* gain 1    (0x00 | UNI) */
 100                UNI_RANGE(1),           /* gain 10   (0x01 | UNI) */
 101                UNI_RANGE(0.1),         /* gain 100  (0x02 | UNI) */
 102                UNI_RANGE(0.01)         /* gain 1000 (0x03 | UNI) */
 103        }
 104};
 105
 106static const struct comedi_lrange pci1711_ai_range = {
 107        5, {
 108                BIP_RANGE(10),          /* gain 1  (0x00) */
 109                BIP_RANGE(5),           /* gain 2  (0x01) */
 110                BIP_RANGE(2.5),         /* gain 4  (0x02) */
 111                BIP_RANGE(1.25),        /* gain 8  (0x03) */
 112                BIP_RANGE(0.625)        /* gain 16 (0x04) */
 113        }
 114};
 115
 116static const struct comedi_lrange pci171x_ao_range = {
 117        3, {
 118                UNI_RANGE(5),           /* internal -5V ref */
 119                UNI_RANGE(10),          /* internal -10V ref */
 120                RANGE_ext(0, 1)         /* external -Vref (+/-10V max) */
 121        }
 122};
 123
 124enum pci1710_boardid {
 125        BOARD_PCI1710,
 126        BOARD_PCI1710HG,
 127        BOARD_PCI1711,
 128        BOARD_PCI1713,
 129        BOARD_PCI1731,
 130};
 131
 132struct boardtype {
 133        const char *name;
 134        const struct comedi_lrange *ai_range;
 135        unsigned int is_pci1711:1;
 136        unsigned int is_pci1713:1;
 137        unsigned int has_ao:1;
 138};
 139
 140static const struct boardtype boardtypes[] = {
 141        [BOARD_PCI1710] = {
 142                .name           = "pci1710",
 143                .ai_range       = &pci1710_ai_range,
 144                .has_ao         = 1,
 145        },
 146        [BOARD_PCI1710HG] = {
 147                .name           = "pci1710hg",
 148                .ai_range       = &pci1710hg_ai_range,
 149                .has_ao         = 1,
 150        },
 151        [BOARD_PCI1711] = {
 152                .name           = "pci1711",
 153                .ai_range       = &pci1711_ai_range,
 154                .is_pci1711     = 1,
 155                .has_ao         = 1,
 156        },
 157        [BOARD_PCI1713] = {
 158                .name           = "pci1713",
 159                .ai_range       = &pci1710_ai_range,
 160                .is_pci1713     = 1,
 161        },
 162        [BOARD_PCI1731] = {
 163                .name           = "pci1731",
 164                .ai_range       = &pci1711_ai_range,
 165                .is_pci1711     = 1,
 166        },
 167};
 168
 169struct pci1710_private {
 170        unsigned int max_samples;
 171        unsigned int ctrl;      /* control register value */
 172        unsigned int ctrl_ext;  /* used to switch from TRIG_EXT to TRIG_xxx */
 173        unsigned int mux_scan;  /* used to set the channel interval to scan */
 174        unsigned char ai_et;
 175        unsigned int act_chanlist[32];  /*  list of scanned channel */
 176        unsigned char saved_seglen;     /* len of the non-repeating chanlist */
 177        unsigned char da_ranges;        /*  copy of D/A outpit range register */
 178        unsigned char unipolar_gain;    /* adjust for unipolar gain codes */
 179};
 180
 181static int pci1710_ai_check_chanlist(struct comedi_device *dev,
 182                                     struct comedi_subdevice *s,
 183                                     struct comedi_cmd *cmd)
 184{
 185        struct pci1710_private *devpriv = dev->private;
 186        unsigned int chan0 = CR_CHAN(cmd->chanlist[0]);
 187        unsigned int last_aref = CR_AREF(cmd->chanlist[0]);
 188        unsigned int next_chan = (chan0 + 1) % s->n_chan;
 189        unsigned int chansegment[32];
 190        unsigned int seglen;
 191        int i;
 192
 193        if (cmd->chanlist_len == 1) {
 194                devpriv->saved_seglen = cmd->chanlist_len;
 195                return 0;
 196        }
 197
 198        /* first channel is always ok */
 199        chansegment[0] = cmd->chanlist[0];
 200
 201        for (i = 1; i < cmd->chanlist_len; i++) {
 202                unsigned int chan = CR_CHAN(cmd->chanlist[i]);
 203                unsigned int aref = CR_AREF(cmd->chanlist[i]);
 204
 205                if (cmd->chanlist[0] == cmd->chanlist[i])
 206                        break;  /*  we detected a loop, stop */
 207
 208                if (aref == AREF_DIFF && (chan & 1)) {
 209                        dev_err(dev->class_dev,
 210                                "Odd channel cannot be differential input!\n");
 211                        return -EINVAL;
 212                }
 213
 214                if (last_aref == AREF_DIFF)
 215                        next_chan = (next_chan + 1) % s->n_chan;
 216                if (chan != next_chan) {
 217                        dev_err(dev->class_dev,
 218                                "channel list must be continuous! chanlist[%i]=%d but must be %d or %d!\n",
 219                                i, chan, next_chan, chan0);
 220                        return -EINVAL;
 221                }
 222
 223                /* next correct channel in list */
 224                chansegment[i] = cmd->chanlist[i];
 225                last_aref = aref;
 226        }
 227        seglen = i;
 228
 229        for (i = 0; i < cmd->chanlist_len; i++) {
 230                if (cmd->chanlist[i] != chansegment[i % seglen]) {
 231                        dev_err(dev->class_dev,
 232                                "bad channel, reference or range number! chanlist[%i]=%d,%d,%d and not %d,%d,%d!\n",
 233                                i, CR_CHAN(chansegment[i]),
 234                                CR_RANGE(chansegment[i]),
 235                                CR_AREF(chansegment[i]),
 236                                CR_CHAN(cmd->chanlist[i % seglen]),
 237                                CR_RANGE(cmd->chanlist[i % seglen]),
 238                                CR_AREF(chansegment[i % seglen]));
 239                        return -EINVAL;
 240                }
 241        }
 242        devpriv->saved_seglen = seglen;
 243
 244        return 0;
 245}
 246
 247static void pci1710_ai_setup_chanlist(struct comedi_device *dev,
 248                                      struct comedi_subdevice *s,
 249                                      unsigned int *chanlist,
 250                                      unsigned int n_chan,
 251                                      unsigned int seglen)
 252{
 253        struct pci1710_private *devpriv = dev->private;
 254        unsigned int first_chan = CR_CHAN(chanlist[0]);
 255        unsigned int last_chan = CR_CHAN(chanlist[seglen - 1]);
 256        unsigned int i;
 257
 258        for (i = 0; i < seglen; i++) {  /*  store range list to card */
 259                unsigned int chan = CR_CHAN(chanlist[i]);
 260                unsigned int range = CR_RANGE(chanlist[i]);
 261                unsigned int aref = CR_AREF(chanlist[i]);
 262                unsigned int rangeval = 0;
 263
 264                if (aref == AREF_DIFF)
 265                        rangeval |= PCI171X_RANGE_DIFF;
 266                if (comedi_range_is_unipolar(s, range)) {
 267                        rangeval |= PCI171X_RANGE_UNI;
 268                        range -= devpriv->unipolar_gain;
 269                }
 270                rangeval |= PCI171X_RANGE_GAIN(range);
 271
 272                /* select channel and set range */
 273                outw(PCI171X_MUX_CHAN(chan), dev->iobase + PCI171X_MUX_REG);
 274                outw(rangeval, dev->iobase + PCI171X_RANGE_REG);
 275
 276                devpriv->act_chanlist[i] = chan;
 277        }
 278        for ( ; i < n_chan; i++)        /* store remainder of channel list */
 279                devpriv->act_chanlist[i] = CR_CHAN(chanlist[i]);
 280
 281        /* select channel interval to scan */
 282        devpriv->mux_scan = PCI171X_MUX_CHANL(first_chan) |
 283                            PCI171X_MUX_CHANH(last_chan);
 284        outw(devpriv->mux_scan, dev->iobase + PCI171X_MUX_REG);
 285}
 286
 287static int pci1710_ai_eoc(struct comedi_device *dev,
 288                          struct comedi_subdevice *s,
 289                          struct comedi_insn *insn,
 290                          unsigned long context)
 291{
 292        unsigned int status;
 293
 294        status = inw(dev->iobase + PCI171X_STATUS_REG);
 295        if ((status & PCI171X_STATUS_FE) == 0)
 296                return 0;
 297        return -EBUSY;
 298}
 299
 300static int pci1710_ai_read_sample(struct comedi_device *dev,
 301                                  struct comedi_subdevice *s,
 302                                  unsigned int cur_chan,
 303                                  unsigned int *val)
 304{
 305        const struct boardtype *board = dev->board_ptr;
 306        struct pci1710_private *devpriv = dev->private;
 307        unsigned int sample;
 308        unsigned int chan;
 309
 310        sample = inw(dev->iobase + PCI171X_AD_DATA_REG);
 311        if (!board->is_pci1713) {
 312                /*
 313                 * The upper 4 bits of the 16-bit sample are the channel number
 314                 * that the sample was acquired from. Verify that this channel
 315                 * number matches the expected channel number.
 316                 */
 317                chan = sample >> 12;
 318                if (chan != devpriv->act_chanlist[cur_chan]) {
 319                        dev_err(dev->class_dev,
 320                                "A/D data droput: received from channel %d, expected %d\n",
 321                                chan, devpriv->act_chanlist[cur_chan]);
 322                        return -ENODATA;
 323                }
 324        }
 325        *val = sample & s->maxdata;
 326        return 0;
 327}
 328
 329static int pci1710_ai_insn_read(struct comedi_device *dev,
 330                                struct comedi_subdevice *s,
 331                                struct comedi_insn *insn,
 332                                unsigned int *data)
 333{
 334        struct pci1710_private *devpriv = dev->private;
 335        int ret = 0;
 336        int i;
 337
 338        /* enable software trigger */
 339        devpriv->ctrl |= PCI171X_CTRL_SW;
 340        outw(devpriv->ctrl, dev->iobase + PCI171X_CTRL_REG);
 341
 342        outb(0, dev->iobase + PCI171X_CLRFIFO_REG);
 343        outb(0, dev->iobase + PCI171X_CLRINT_REG);
 344
 345        pci1710_ai_setup_chanlist(dev, s, &insn->chanspec, 1, 1);
 346
 347        for (i = 0; i < insn->n; i++) {
 348                unsigned int val;
 349
 350                /* start conversion */
 351                outw(0, dev->iobase + PCI171X_SOFTTRG_REG);
 352
 353                ret = comedi_timeout(dev, s, insn, pci1710_ai_eoc, 0);
 354                if (ret)
 355                        break;
 356
 357                ret = pci1710_ai_read_sample(dev, s, 0, &val);
 358                if (ret)
 359                        break;
 360
 361                data[i] = val;
 362        }
 363
 364        /* disable software trigger */
 365        devpriv->ctrl &= ~PCI171X_CTRL_SW;
 366        outw(devpriv->ctrl, dev->iobase + PCI171X_CTRL_REG);
 367
 368        outb(0, dev->iobase + PCI171X_CLRFIFO_REG);
 369        outb(0, dev->iobase + PCI171X_CLRINT_REG);
 370
 371        return ret ? ret : insn->n;
 372}
 373
 374static int pci1710_ai_cancel(struct comedi_device *dev,
 375                             struct comedi_subdevice *s)
 376{
 377        struct pci1710_private *devpriv = dev->private;
 378
 379        /* disable A/D triggers and interrupt sources */
 380        devpriv->ctrl &= PCI171X_CTRL_CNT0;     /* preserve counter 0 clk src */
 381        outw(devpriv->ctrl, dev->iobase + PCI171X_CTRL_REG);
 382
 383        /* disable pacer */
 384        comedi_8254_pacer_enable(dev->pacer, 1, 2, false);
 385
 386        /* clear A/D FIFO and any pending interrutps */
 387        outb(0, dev->iobase + PCI171X_CLRFIFO_REG);
 388        outb(0, dev->iobase + PCI171X_CLRINT_REG);
 389
 390        return 0;
 391}
 392
 393static void pci1710_handle_every_sample(struct comedi_device *dev,
 394                                        struct comedi_subdevice *s)
 395{
 396        struct comedi_cmd *cmd = &s->async->cmd;
 397        unsigned int status;
 398        unsigned int val;
 399        int ret;
 400
 401        status = inw(dev->iobase + PCI171X_STATUS_REG);
 402        if (status & PCI171X_STATUS_FE) {
 403                dev_dbg(dev->class_dev, "A/D FIFO empty (%4x)\n", status);
 404                s->async->events |= COMEDI_CB_ERROR;
 405                return;
 406        }
 407        if (status & PCI171X_STATUS_FF) {
 408                dev_dbg(dev->class_dev,
 409                        "A/D FIFO Full status (Fatal Error!) (%4x)\n", status);
 410                s->async->events |= COMEDI_CB_ERROR;
 411                return;
 412        }
 413
 414        outb(0, dev->iobase + PCI171X_CLRINT_REG);
 415
 416        for (; !(inw(dev->iobase + PCI171X_STATUS_REG) & PCI171X_STATUS_FE);) {
 417                ret = pci1710_ai_read_sample(dev, s, s->async->cur_chan, &val);
 418                if (ret) {
 419                        s->async->events |= COMEDI_CB_ERROR;
 420                        break;
 421                }
 422
 423                comedi_buf_write_samples(s, &val, 1);
 424
 425                if (cmd->stop_src == TRIG_COUNT &&
 426                    s->async->scans_done >= cmd->stop_arg) {
 427                        s->async->events |= COMEDI_CB_EOA;
 428                        break;
 429                }
 430        }
 431
 432        outb(0, dev->iobase + PCI171X_CLRINT_REG);
 433}
 434
 435static void pci1710_handle_fifo(struct comedi_device *dev,
 436                                struct comedi_subdevice *s)
 437{
 438        struct pci1710_private *devpriv = dev->private;
 439        struct comedi_async *async = s->async;
 440        struct comedi_cmd *cmd = &async->cmd;
 441        unsigned int status;
 442        int i;
 443
 444        status = inw(dev->iobase + PCI171X_STATUS_REG);
 445        if (!(status & PCI171X_STATUS_FH)) {
 446                dev_dbg(dev->class_dev, "A/D FIFO not half full!\n");
 447                async->events |= COMEDI_CB_ERROR;
 448                return;
 449        }
 450        if (status & PCI171X_STATUS_FF) {
 451                dev_dbg(dev->class_dev,
 452                        "A/D FIFO Full status (Fatal Error!)\n");
 453                async->events |= COMEDI_CB_ERROR;
 454                return;
 455        }
 456
 457        for (i = 0; i < devpriv->max_samples; i++) {
 458                unsigned int val;
 459                int ret;
 460
 461                ret = pci1710_ai_read_sample(dev, s, s->async->cur_chan, &val);
 462                if (ret) {
 463                        s->async->events |= COMEDI_CB_ERROR;
 464                        break;
 465                }
 466
 467                if (!comedi_buf_write_samples(s, &val, 1))
 468                        break;
 469
 470                if (cmd->stop_src == TRIG_COUNT &&
 471                    async->scans_done >= cmd->stop_arg) {
 472                        async->events |= COMEDI_CB_EOA;
 473                        break;
 474                }
 475        }
 476
 477        outb(0, dev->iobase + PCI171X_CLRINT_REG);
 478}
 479
 480static irqreturn_t pci1710_irq_handler(int irq, void *d)
 481{
 482        struct comedi_device *dev = d;
 483        struct pci1710_private *devpriv = dev->private;
 484        struct comedi_subdevice *s;
 485        struct comedi_cmd *cmd;
 486
 487        if (!dev->attached)     /*  is device attached? */
 488                return IRQ_NONE;        /*  no, exit */
 489
 490        s = dev->read_subdev;
 491        cmd = &s->async->cmd;
 492
 493        /*  is this interrupt from our board? */
 494        if (!(inw(dev->iobase + PCI171X_STATUS_REG) & PCI171X_STATUS_IRQ))
 495                return IRQ_NONE;        /*  no, exit */
 496
 497        if (devpriv->ai_et) {   /*  Switch from initial TRIG_EXT to TRIG_xxx. */
 498                devpriv->ai_et = 0;
 499                devpriv->ctrl &= PCI171X_CTRL_CNT0;
 500                devpriv->ctrl |= PCI171X_CTRL_SW; /* set software trigger */
 501                outw(devpriv->ctrl, dev->iobase + PCI171X_CTRL_REG);
 502                devpriv->ctrl = devpriv->ctrl_ext;
 503                outb(0, dev->iobase + PCI171X_CLRFIFO_REG);
 504                outb(0, dev->iobase + PCI171X_CLRINT_REG);
 505                /* no sample on this interrupt; reset the channel interval */
 506                outw(devpriv->mux_scan, dev->iobase + PCI171X_MUX_REG);
 507                outw(devpriv->ctrl, dev->iobase + PCI171X_CTRL_REG);
 508                comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
 509                return IRQ_HANDLED;
 510        }
 511
 512        if (cmd->flags & CMDF_WAKE_EOS)
 513                pci1710_handle_every_sample(dev, s);
 514        else
 515                pci1710_handle_fifo(dev, s);
 516
 517        comedi_handle_events(dev, s);
 518
 519        return IRQ_HANDLED;
 520}
 521
 522static int pci1710_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 523{
 524        struct pci1710_private *devpriv = dev->private;
 525        struct comedi_cmd *cmd = &s->async->cmd;
 526
 527        pci1710_ai_setup_chanlist(dev, s, cmd->chanlist, cmd->chanlist_len,
 528                                  devpriv->saved_seglen);
 529
 530        outb(0, dev->iobase + PCI171X_CLRFIFO_REG);
 531        outb(0, dev->iobase + PCI171X_CLRINT_REG);
 532
 533        devpriv->ctrl &= PCI171X_CTRL_CNT0;
 534        if ((cmd->flags & CMDF_WAKE_EOS) == 0)
 535                devpriv->ctrl |= PCI171X_CTRL_ONEFH;
 536
 537        if (cmd->convert_src == TRIG_TIMER) {
 538                comedi_8254_update_divisors(dev->pacer);
 539
 540                devpriv->ctrl |= PCI171X_CTRL_PACER | PCI171X_CTRL_IRQEN;
 541                if (cmd->start_src == TRIG_EXT) {
 542                        devpriv->ctrl_ext = devpriv->ctrl;
 543                        devpriv->ctrl &= ~(PCI171X_CTRL_PACER |
 544                                           PCI171X_CTRL_ONEFH |
 545                                           PCI171X_CTRL_GATE);
 546                        devpriv->ctrl |= PCI171X_CTRL_EXT;
 547                        devpriv->ai_et = 1;
 548                } else {        /* TRIG_NOW */
 549                        devpriv->ai_et = 0;
 550                }
 551                outw(devpriv->ctrl, dev->iobase + PCI171X_CTRL_REG);
 552
 553                if (cmd->start_src == TRIG_NOW)
 554                        comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
 555        } else {        /* TRIG_EXT */
 556                devpriv->ctrl |= PCI171X_CTRL_EXT | PCI171X_CTRL_IRQEN;
 557                outw(devpriv->ctrl, dev->iobase + PCI171X_CTRL_REG);
 558        }
 559
 560        return 0;
 561}
 562
 563static int pci1710_ai_cmdtest(struct comedi_device *dev,
 564                              struct comedi_subdevice *s,
 565                              struct comedi_cmd *cmd)
 566{
 567        int err = 0;
 568
 569        /* Step 1 : check if triggers are trivially valid */
 570
 571        err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT);
 572        err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
 573        err |= comedi_check_trigger_src(&cmd->convert_src,
 574                                        TRIG_TIMER | TRIG_EXT);
 575        err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 576        err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
 577
 578        if (err)
 579                return 1;
 580
 581        /* step 2a: make sure trigger sources are unique */
 582
 583        err |= comedi_check_trigger_is_unique(cmd->start_src);
 584        err |= comedi_check_trigger_is_unique(cmd->convert_src);
 585        err |= comedi_check_trigger_is_unique(cmd->stop_src);
 586
 587        /* step 2b: and mutually compatible */
 588
 589        if (err)
 590                return 2;
 591
 592        /* Step 3: check if arguments are trivially valid */
 593
 594        err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
 595        err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 596
 597        if (cmd->convert_src == TRIG_TIMER)
 598                err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 10000);
 599        else    /* TRIG_FOLLOW */
 600                err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
 601
 602        err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
 603                                           cmd->chanlist_len);
 604
 605        if (cmd->stop_src == TRIG_COUNT)
 606                err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
 607        else    /* TRIG_NONE */
 608                err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
 609
 610        if (err)
 611                return 3;
 612
 613        /* step 4: fix up any arguments */
 614
 615        if (cmd->convert_src == TRIG_TIMER) {
 616                unsigned int arg = cmd->convert_arg;
 617
 618                comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
 619                err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
 620        }
 621
 622        if (err)
 623                return 4;
 624
 625        /* Step 5: check channel list */
 626
 627        err |= pci1710_ai_check_chanlist(dev, s, cmd);
 628
 629        if (err)
 630                return 5;
 631
 632        return 0;
 633}
 634
 635static int pci1710_ao_insn_write(struct comedi_device *dev,
 636                                 struct comedi_subdevice *s,
 637                                 struct comedi_insn *insn,
 638                                 unsigned int *data)
 639{
 640        struct pci1710_private *devpriv = dev->private;
 641        unsigned int chan = CR_CHAN(insn->chanspec);
 642        unsigned int range = CR_RANGE(insn->chanspec);
 643        unsigned int val = s->readback[chan];
 644        int i;
 645
 646        devpriv->da_ranges &= ~PCI171X_DAREF_MASK(chan);
 647        devpriv->da_ranges |= PCI171X_DAREF(chan, range);
 648        outw(devpriv->da_ranges, dev->iobase + PCI171X_DAREF_REG);
 649
 650        for (i = 0; i < insn->n; i++) {
 651                val = data[i];
 652                outw(val, dev->iobase + PCI171X_DA_REG(chan));
 653        }
 654
 655        s->readback[chan] = val;
 656
 657        return insn->n;
 658}
 659
 660static int pci1710_di_insn_bits(struct comedi_device *dev,
 661                                struct comedi_subdevice *s,
 662                                struct comedi_insn *insn,
 663                                unsigned int *data)
 664{
 665        data[1] = inw(dev->iobase + PCI171X_DI_REG);
 666
 667        return insn->n;
 668}
 669
 670static int pci1710_do_insn_bits(struct comedi_device *dev,
 671                                struct comedi_subdevice *s,
 672                                struct comedi_insn *insn,
 673                                unsigned int *data)
 674{
 675        if (comedi_dio_update_state(s, data))
 676                outw(s->state, dev->iobase + PCI171X_DO_REG);
 677
 678        data[1] = s->state;
 679
 680        return insn->n;
 681}
 682
 683static int pci1710_counter_insn_config(struct comedi_device *dev,
 684                                       struct comedi_subdevice *s,
 685                                       struct comedi_insn *insn,
 686                                       unsigned int *data)
 687{
 688        struct pci1710_private *devpriv = dev->private;
 689
 690        switch (data[0]) {
 691        case INSN_CONFIG_SET_CLOCK_SRC:
 692                switch (data[1]) {
 693                case 0: /* internal */
 694                        devpriv->ctrl_ext &= ~PCI171X_CTRL_CNT0;
 695                        break;
 696                case 1: /* external */
 697                        devpriv->ctrl_ext |= PCI171X_CTRL_CNT0;
 698                        break;
 699                default:
 700                        return -EINVAL;
 701                }
 702                outw(devpriv->ctrl_ext, dev->iobase + PCI171X_CTRL_REG);
 703                break;
 704        case INSN_CONFIG_GET_CLOCK_SRC:
 705                if (devpriv->ctrl_ext & PCI171X_CTRL_CNT0) {
 706                        data[1] = 1;
 707                        data[2] = 0;
 708                } else {
 709                        data[1] = 0;
 710                        data[2] = I8254_OSC_BASE_1MHZ;
 711                }
 712                break;
 713        default:
 714                return -EINVAL;
 715        }
 716
 717        return insn->n;
 718}
 719
 720static void pci1710_reset(struct comedi_device *dev)
 721{
 722        const struct boardtype *board = dev->board_ptr;
 723
 724        /*
 725         * Disable A/D triggers and interrupt sources, set counter 0
 726         * to use internal 1 MHz clock.
 727         */
 728        outw(0, dev->iobase + PCI171X_CTRL_REG);
 729
 730        /* clear A/D FIFO and any pending interrutps */
 731        outb(0, dev->iobase + PCI171X_CLRFIFO_REG);
 732        outb(0, dev->iobase + PCI171X_CLRINT_REG);
 733
 734        if (board->has_ao) {
 735                /* set DACs to 0..5V and outputs to 0V */
 736                outb(0, dev->iobase + PCI171X_DAREF_REG);
 737                outw(0, dev->iobase + PCI171X_DA_REG(0));
 738                outw(0, dev->iobase + PCI171X_DA_REG(1));
 739        }
 740
 741        /* set digital outputs to 0 */
 742        outw(0, dev->iobase + PCI171X_DO_REG);
 743}
 744
 745static int pci1710_auto_attach(struct comedi_device *dev,
 746                               unsigned long context)
 747{
 748        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 749        const struct boardtype *board = NULL;
 750        struct pci1710_private *devpriv;
 751        struct comedi_subdevice *s;
 752        int ret, subdev, n_subdevices;
 753        int i;
 754
 755        if (context < ARRAY_SIZE(boardtypes))
 756                board = &boardtypes[context];
 757        if (!board)
 758                return -ENODEV;
 759        dev->board_ptr = board;
 760        dev->board_name = board->name;
 761
 762        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 763        if (!devpriv)
 764                return -ENOMEM;
 765
 766        ret = comedi_pci_enable(dev);
 767        if (ret)
 768                return ret;
 769        dev->iobase = pci_resource_start(pcidev, 2);
 770
 771        dev->pacer = comedi_8254_init(dev->iobase + PCI171X_TIMER_BASE,
 772                                      I8254_OSC_BASE_10MHZ, I8254_IO16, 0);
 773        if (!dev->pacer)
 774                return -ENOMEM;
 775
 776        n_subdevices = 1;       /* all boards have analog inputs */
 777        if (board->has_ao)
 778                n_subdevices++;
 779        if (!board->is_pci1713) {
 780                /*
 781                 * All other boards have digital inputs and outputs as
 782                 * well as a user counter.
 783                 */
 784                n_subdevices += 3;
 785        }
 786
 787        ret = comedi_alloc_subdevices(dev, n_subdevices);
 788        if (ret)
 789                return ret;
 790
 791        pci1710_reset(dev);
 792
 793        if (pcidev->irq) {
 794                ret = request_irq(pcidev->irq, pci1710_irq_handler,
 795                                  IRQF_SHARED, dev->board_name, dev);
 796                if (ret == 0)
 797                        dev->irq = pcidev->irq;
 798        }
 799
 800        subdev = 0;
 801
 802        /* Analog Input subdevice */
 803        s = &dev->subdevices[subdev++];
 804        s->type         = COMEDI_SUBD_AI;
 805        s->subdev_flags = SDF_READABLE | SDF_GROUND;
 806        if (!board->is_pci1711)
 807                s->subdev_flags |= SDF_DIFF;
 808        s->n_chan       = board->is_pci1713 ? 32 : 16;
 809        s->maxdata      = 0x0fff;
 810        s->range_table  = board->ai_range;
 811        s->insn_read    = pci1710_ai_insn_read;
 812        if (dev->irq) {
 813                dev->read_subdev = s;
 814                s->subdev_flags |= SDF_CMD_READ;
 815                s->len_chanlist = s->n_chan;
 816                s->do_cmdtest   = pci1710_ai_cmdtest;
 817                s->do_cmd       = pci1710_ai_cmd;
 818                s->cancel       = pci1710_ai_cancel;
 819        }
 820
 821        /* find the value needed to adjust for unipolar gain codes */
 822        for (i = 0; i < s->range_table->length; i++) {
 823                if (comedi_range_is_unipolar(s, i)) {
 824                        devpriv->unipolar_gain = i;
 825                        break;
 826                }
 827        }
 828
 829        if (board->has_ao) {
 830                /* Analog Output subdevice */
 831                s = &dev->subdevices[subdev++];
 832                s->type         = COMEDI_SUBD_AO;
 833                s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
 834                s->n_chan       = 2;
 835                s->maxdata      = 0x0fff;
 836                s->range_table  = &pci171x_ao_range;
 837                s->insn_write   = pci1710_ao_insn_write;
 838
 839                ret = comedi_alloc_subdev_readback(s);
 840                if (ret)
 841                        return ret;
 842        }
 843
 844        if (!board->is_pci1713) {
 845                /* Digital Input subdevice */
 846                s = &dev->subdevices[subdev++];
 847                s->type         = COMEDI_SUBD_DI;
 848                s->subdev_flags = SDF_READABLE;
 849                s->n_chan       = 16;
 850                s->maxdata      = 1;
 851                s->range_table  = &range_digital;
 852                s->insn_bits    = pci1710_di_insn_bits;
 853
 854                /* Digital Output subdevice */
 855                s = &dev->subdevices[subdev++];
 856                s->type         = COMEDI_SUBD_DO;
 857                s->subdev_flags = SDF_WRITABLE;
 858                s->n_chan       = 16;
 859                s->maxdata      = 1;
 860                s->range_table  = &range_digital;
 861                s->insn_bits    = pci1710_do_insn_bits;
 862
 863                /* Counter subdevice (8254) */
 864                s = &dev->subdevices[subdev++];
 865                comedi_8254_subdevice_init(s, dev->pacer);
 866
 867                dev->pacer->insn_config = pci1710_counter_insn_config;
 868
 869                /* counters 1 and 2 are used internally for the pacer */
 870                comedi_8254_set_busy(dev->pacer, 1, true);
 871                comedi_8254_set_busy(dev->pacer, 2, true);
 872        }
 873
 874        /* max_samples is half the FIFO size (2 bytes/sample) */
 875        devpriv->max_samples = (board->is_pci1711) ? 512 : 2048;
 876
 877        return 0;
 878}
 879
 880static struct comedi_driver adv_pci1710_driver = {
 881        .driver_name    = "adv_pci1710",
 882        .module         = THIS_MODULE,
 883        .auto_attach    = pci1710_auto_attach,
 884        .detach         = comedi_pci_detach,
 885};
 886
 887static int adv_pci1710_pci_probe(struct pci_dev *dev,
 888                                 const struct pci_device_id *id)
 889{
 890        return comedi_pci_auto_config(dev, &adv_pci1710_driver,
 891                                      id->driver_data);
 892}
 893
 894static const struct pci_device_id adv_pci1710_pci_table[] = {
 895        {
 896                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 897                               PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050),
 898                .driver_data = BOARD_PCI1710,
 899        }, {
 900                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 901                               PCI_VENDOR_ID_ADVANTECH, 0x0000),
 902                .driver_data = BOARD_PCI1710,
 903        }, {
 904                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 905                               PCI_VENDOR_ID_ADVANTECH, 0xb100),
 906                .driver_data = BOARD_PCI1710,
 907        }, {
 908                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 909                               PCI_VENDOR_ID_ADVANTECH, 0xb200),
 910                .driver_data = BOARD_PCI1710,
 911        }, {
 912                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 913                               PCI_VENDOR_ID_ADVANTECH, 0xc100),
 914                .driver_data = BOARD_PCI1710,
 915        }, {
 916                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 917                               PCI_VENDOR_ID_ADVANTECH, 0xc200),
 918                .driver_data = BOARD_PCI1710,
 919        }, {
 920                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710, 0x1000, 0xd100),
 921                .driver_data = BOARD_PCI1710,
 922        }, {
 923                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 924                               PCI_VENDOR_ID_ADVANTECH, 0x0002),
 925                .driver_data = BOARD_PCI1710HG,
 926        }, {
 927                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 928                               PCI_VENDOR_ID_ADVANTECH, 0xb102),
 929                .driver_data = BOARD_PCI1710HG,
 930        }, {
 931                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 932                               PCI_VENDOR_ID_ADVANTECH, 0xb202),
 933                .driver_data = BOARD_PCI1710HG,
 934        }, {
 935                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 936                               PCI_VENDOR_ID_ADVANTECH, 0xc102),
 937                .driver_data = BOARD_PCI1710HG,
 938        }, {
 939                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710,
 940                               PCI_VENDOR_ID_ADVANTECH, 0xc202),
 941                .driver_data = BOARD_PCI1710HG,
 942        }, {
 943                PCI_DEVICE_SUB(PCI_VENDOR_ID_ADVANTECH, 0x1710, 0x1000, 0xd102),
 944                .driver_data = BOARD_PCI1710HG,
 945        },
 946        { PCI_VDEVICE(ADVANTECH, 0x1711), BOARD_PCI1711 },
 947        { PCI_VDEVICE(ADVANTECH, 0x1713), BOARD_PCI1713 },
 948        { PCI_VDEVICE(ADVANTECH, 0x1731), BOARD_PCI1731 },
 949        { 0 }
 950};
 951MODULE_DEVICE_TABLE(pci, adv_pci1710_pci_table);
 952
 953static struct pci_driver adv_pci1710_pci_driver = {
 954        .name           = "adv_pci1710",
 955        .id_table       = adv_pci1710_pci_table,
 956        .probe          = adv_pci1710_pci_probe,
 957        .remove         = comedi_pci_auto_unconfig,
 958};
 959module_comedi_pci_driver(adv_pci1710_driver, adv_pci1710_pci_driver);
 960
 961MODULE_AUTHOR("Comedi http://www.comedi.org");
 962MODULE_DESCRIPTION("Comedi: Advantech PCI-1710 Series Multifunction DAS Cards");
 963MODULE_LICENSE("GPL");
 964