drivers/staging/comedi/drivers/mf6x4.c

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This source file includes following definitions.
mf6x4_di_insn_bits
mf6x4_do_insn_bits
mf6x4_ai_eoc
mf6x4_ai_insn_read
mf6x4_ao_insn_write
mf6x4_auto_attach
mf6x4_detach
mf6x4_pci_probe
   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  comedi/drivers/mf6x4.c
   4  *  Driver for Humusoft MF634 and MF624 Data acquisition cards
   5  *
   6  *  COMEDI - Linux Control and Measurement Device Interface
   7  *  Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   8  */
   9 /*
  10  * Driver: mf6x4
  11  * Description: Humusoft MF634 and MF624 Data acquisition card driver
  12  * Devices: [Humusoft] MF634 (mf634), MF624 (mf624)
  13  * Author: Rostislav Lisovy <lisovy@gmail.com>
  14  * Status: works
  15  * Updated:
  16  * Configuration Options: none
  17  */
  18 
  19 #include <linux/module.h>
  20 #include <linux/delay.h>
  21 
  22 #include "../comedi_pci.h"
  23 
  24 /* Registers present in BAR0 memory region */
  25 #define MF624_GPIOC_REG         0x54
  26 
  27 #define MF6X4_GPIOC_EOLC        BIT(17) /* End Of Last Conversion */
  28 #define MF6X4_GPIOC_LDAC        BIT(23) /* Load DACs */
  29 #define MF6X4_GPIOC_DACEN       BIT(26)
  30 
  31 /* BAR1 registers */
  32 #define MF6X4_ADDATA_REG        0x00
  33 #define MF6X4_ADCTRL_REG        0x00
  34 #define MF6X4_ADCTRL_CHAN(x)    BIT(chan)
  35 #define MF6X4_DIN_REG           0x10
  36 #define MF6X4_DIN_MASK          0xff
  37 #define MF6X4_DOUT_REG          0x10
  38 #define MF6X4_ADSTART_REG       0x20
  39 #define MF6X4_DAC_REG(x)        (0x20 + ((x) * 2))
  40 
  41 /* BAR2 registers */
  42 #define MF634_GPIOC_REG         0x68
  43 
  44 enum mf6x4_boardid {
  45         BOARD_MF634,
  46         BOARD_MF624,
  47 };
  48 
  49 struct mf6x4_board {
  50         const char *name;
  51         /* We need to keep track of the order of BARs used by the cards */
  52         unsigned int bar_nums[3];
  53 };
  54 
  55 static const struct mf6x4_board mf6x4_boards[] = {
  56         [BOARD_MF634] = {
  57                 .name           = "mf634",
  58                 .bar_nums       = {0, 2, 3},
  59         },
  60         [BOARD_MF624] = {
  61                 .name           = "mf624",
  62                 .bar_nums       = {0, 2, 4},
  63         },
  64 };
  65 
  66 struct mf6x4_private {
  67         /*
  68          * Documentation for both MF634 and MF624 describes registers
  69          * present in BAR0, 1 and 2 regions.
  70          * The real (i.e. in HW) BAR numbers are different for MF624
  71          * and MF634 yet we will call them 0, 1, 2
  72          */
  73         void __iomem *bar0_mem;
  74         void __iomem *bar2_mem;
  75 
  76         /*
  77          * This configuration register has the same function and fields
  78          * for both cards however it lies in different BARs on different
  79          * offsets -- this variable makes the access easier
  80          */
  81         void __iomem *gpioc_reg;
  82 };
  83 
  84 static int mf6x4_di_insn_bits(struct comedi_device *dev,
  85                               struct comedi_subdevice *s,
  86                               struct comedi_insn *insn,
  87                               unsigned int *data)
  88 {
  89         data[1] = ioread16(dev->mmio + MF6X4_DIN_REG) & MF6X4_DIN_MASK;
  90 
  91         return insn->n;
  92 }
  93 
  94 static int mf6x4_do_insn_bits(struct comedi_device *dev,
  95                               struct comedi_subdevice *s,
  96                               struct comedi_insn *insn,
  97                               unsigned int *data)
  98 {
  99         if (comedi_dio_update_state(s, data))
 100                 iowrite16(s->state, dev->mmio + MF6X4_DOUT_REG);
 101 
 102         data[1] = s->state;
 103 
 104         return insn->n;
 105 }
 106 
 107 static int mf6x4_ai_eoc(struct comedi_device *dev,
 108                         struct comedi_subdevice *s,
 109                         struct comedi_insn *insn,
 110                         unsigned long context)
 111 {
 112         struct mf6x4_private *devpriv = dev->private;
 113         unsigned int status;
 114 
 115         status = ioread32(devpriv->gpioc_reg);
 116         if (status & MF6X4_GPIOC_EOLC)
 117                 return 0;
 118         return -EBUSY;
 119 }
 120 
 121 static int mf6x4_ai_insn_read(struct comedi_device *dev,
 122                               struct comedi_subdevice *s,
 123                               struct comedi_insn *insn,
 124                               unsigned int *data)
 125 {
 126         unsigned int chan = CR_CHAN(insn->chanspec);
 127         unsigned int d;
 128         int ret;
 129         int i;
 130 
 131         /* Set the ADC channel number in the scan list */
 132         iowrite16(MF6X4_ADCTRL_CHAN(chan), dev->mmio + MF6X4_ADCTRL_REG);
 133 
 134         for (i = 0; i < insn->n; i++) {
 135                 /* Trigger ADC conversion by reading ADSTART */
 136                 ioread16(dev->mmio + MF6X4_ADSTART_REG);
 137 
 138                 ret = comedi_timeout(dev, s, insn, mf6x4_ai_eoc, 0);
 139                 if (ret)
 140                         return ret;
 141 
 142                 /* Read the actual value */
 143                 d = ioread16(dev->mmio + MF6X4_ADDATA_REG);
 144                 d &= s->maxdata;
 145                 /* munge the 2's complement data to offset binary */
 146                 data[i] = comedi_offset_munge(s, d);
 147         }
 148 
 149         iowrite16(0x0, dev->mmio + MF6X4_ADCTRL_REG);
 150 
 151         return insn->n;
 152 }
 153 
 154 static int mf6x4_ao_insn_write(struct comedi_device *dev,
 155                                struct comedi_subdevice *s,
 156                                struct comedi_insn *insn,
 157                                unsigned int *data)
 158 {
 159         struct mf6x4_private *devpriv = dev->private;
 160         unsigned int chan = CR_CHAN(insn->chanspec);
 161         unsigned int val = s->readback[chan];
 162         unsigned int gpioc;
 163         int i;
 164 
 165         /* Enable instantaneous update of converters outputs + Enable DACs */
 166         gpioc = ioread32(devpriv->gpioc_reg);
 167         iowrite32((gpioc & ~MF6X4_GPIOC_LDAC) | MF6X4_GPIOC_DACEN,
 168                   devpriv->gpioc_reg);
 169 
 170         for (i = 0; i < insn->n; i++) {
 171                 val = data[i];
 172                 iowrite16(val, dev->mmio + MF6X4_DAC_REG(chan));
 173         }
 174         s->readback[chan] = val;
 175 
 176         return insn->n;
 177 }
 178 
 179 static int mf6x4_auto_attach(struct comedi_device *dev, unsigned long context)
 180 {
 181         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 182         const struct mf6x4_board *board = NULL;
 183         struct mf6x4_private *devpriv;
 184         struct comedi_subdevice *s;
 185         int ret;
 186 
 187         if (context < ARRAY_SIZE(mf6x4_boards))
 188                 board = &mf6x4_boards[context];
 189         else
 190                 return -ENODEV;
 191 
 192         dev->board_ptr = board;
 193         dev->board_name = board->name;
 194 
 195         ret = comedi_pci_enable(dev);
 196         if (ret)
 197                 return ret;
 198 
 199         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 200         if (!devpriv)
 201                 return -ENOMEM;
 202 
 203         devpriv->bar0_mem = pci_ioremap_bar(pcidev, board->bar_nums[0]);
 204         if (!devpriv->bar0_mem)
 205                 return -ENODEV;
 206 
 207         dev->mmio = pci_ioremap_bar(pcidev, board->bar_nums[1]);
 208         if (!dev->mmio)
 209                 return -ENODEV;
 210 
 211         devpriv->bar2_mem = pci_ioremap_bar(pcidev, board->bar_nums[2]);
 212         if (!devpriv->bar2_mem)
 213                 return -ENODEV;
 214 
 215         if (board == &mf6x4_boards[BOARD_MF634])
 216                 devpriv->gpioc_reg = devpriv->bar2_mem + MF634_GPIOC_REG;
 217         else
 218                 devpriv->gpioc_reg = devpriv->bar0_mem + MF624_GPIOC_REG;
 219 
 220         ret = comedi_alloc_subdevices(dev, 4);
 221         if (ret)
 222                 return ret;
 223 
 224         /* Analog Input subdevice */
 225         s = &dev->subdevices[0];
 226         s->type         = COMEDI_SUBD_AI;
 227         s->subdev_flags = SDF_READABLE | SDF_GROUND;
 228         s->n_chan       = 8;
 229         s->maxdata      = 0x3fff;
 230         s->range_table  = &range_bipolar10;
 231         s->insn_read    = mf6x4_ai_insn_read;
 232 
 233         /* Analog Output subdevice */
 234         s = &dev->subdevices[1];
 235         s->type         = COMEDI_SUBD_AO;
 236         s->subdev_flags = SDF_WRITABLE;
 237         s->n_chan       = 8;
 238         s->maxdata      = 0x3fff;
 239         s->range_table  = &range_bipolar10;
 240         s->insn_write   = mf6x4_ao_insn_write;
 241 
 242         ret = comedi_alloc_subdev_readback(s);
 243         if (ret)
 244                 return ret;
 245 
 246         /* Digital Input subdevice */
 247         s = &dev->subdevices[2];
 248         s->type         = COMEDI_SUBD_DI;
 249         s->subdev_flags = SDF_READABLE;
 250         s->n_chan       = 8;
 251         s->maxdata      = 1;
 252         s->range_table  = &range_digital;
 253         s->insn_bits    = mf6x4_di_insn_bits;
 254 
 255         /* Digital Output subdevice */
 256         s = &dev->subdevices[3];
 257         s->type         = COMEDI_SUBD_DO;
 258         s->subdev_flags = SDF_WRITABLE;
 259         s->n_chan       = 8;
 260         s->maxdata      = 1;
 261         s->range_table  = &range_digital;
 262         s->insn_bits    = mf6x4_do_insn_bits;
 263 
 264         return 0;
 265 }
 266 
 267 static void mf6x4_detach(struct comedi_device *dev)
 268 {
 269         struct mf6x4_private *devpriv = dev->private;
 270 
 271         if (devpriv) {
 272                 if (devpriv->bar0_mem)
 273                         iounmap(devpriv->bar0_mem);
 274                 if (devpriv->bar2_mem)
 275                         iounmap(devpriv->bar2_mem);
 276         }
 277         comedi_pci_detach(dev);
 278 }
 279 
 280 static struct comedi_driver mf6x4_driver = {
 281         .driver_name    = "mf6x4",
 282         .module         = THIS_MODULE,
 283         .auto_attach    = mf6x4_auto_attach,
 284         .detach         = mf6x4_detach,
 285 };
 286 
 287 static int mf6x4_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 288 {
 289         return comedi_pci_auto_config(dev, &mf6x4_driver, id->driver_data);
 290 }
 291 
 292 static const struct pci_device_id mf6x4_pci_table[] = {
 293         { PCI_VDEVICE(HUMUSOFT, 0x0634), BOARD_MF634 },
 294         { PCI_VDEVICE(HUMUSOFT, 0x0624), BOARD_MF624 },
 295         { 0 }
 296 };
 297 MODULE_DEVICE_TABLE(pci, mf6x4_pci_table);
 298 
 299 static struct pci_driver mf6x4_pci_driver = {
 300         .name           = "mf6x4",
 301         .id_table       = mf6x4_pci_table,
 302         .probe          = mf6x4_pci_probe,
 303         .remove         = comedi_pci_auto_unconfig,
 304 };
 305 
 306 module_comedi_pci_driver(mf6x4_driver, mf6x4_pci_driver);
 307 
 308 MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
 309 MODULE_DESCRIPTION("Comedi MF634 and MF624 DAQ cards driver");
 310 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/staging/comedi/drivers/mf6x4.c

DEFINITIONS
