--- /dev/null
+/*
+ * ni_at_ao.c
+ * Driver for NI AT-AO-6/10 boards
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 2000,2002 David A. Schleef <ds@schleef.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/*
+ * Driver: ni_at_ao
+ * Description: National Instruments AT-AO-6/10
+ * Devices: [National Instruments] AT-AO-6 (at-ao-6), AT-AO-10 (at-ao-10)
+ * Status: should work
+ * Author: David A. Schleef <ds@schleef.org>
+ * Updated: Sun Dec 26 12:26:28 EST 2004
+ *
+ * Configuration options:
+ * [0] - I/O port base address
+ * [1] - IRQ (unused)
+ * [2] - DMA (unused)
+ * [3] - analog output range, set by jumpers on hardware
+ * 0 for -10 to 10V bipolar
+ * 1 for 0V to 10V unipolar
+ */
+
+#include <linux/module.h>
+
+#include "../comedidev.h"
+
+#include "comedi_8254.h"
+
+/*
+ * Register map
+ *
+ * Register-level programming information can be found in NI
+ * document 320379.pdf.
+ */
+#define ATAO_DIO_REG 0x00
+#define ATAO_CFG2_REG 0x02
+#define ATAO_CFG2_CALLD_NOP (0 << 14)
+#define ATAO_CFG2_CALLD(x) ((((x) >> 3) + 1) << 14)
+#define ATAO_CFG2_FFRTEN (1 << 13)
+#define ATAO_CFG2_DACS(x) (1 << (((x) / 2) + 8))
+#define ATAO_CFG2_LDAC(x) (1 << (((x) / 2) + 3))
+#define ATAO_CFG2_PROMEN (1 << 2)
+#define ATAO_CFG2_SCLK (1 << 1)
+#define ATAO_CFG2_SDATA (1 << 0)
+#define ATAO_CFG3_REG 0x04
+#define ATAO_CFG3_DMAMODE (1 << 6)
+#define ATAO_CFG3_CLKOUT (1 << 5)
+#define ATAO_CFG3_RCLKEN (1 << 4)
+#define ATAO_CFG3_DOUTEN2 (1 << 3)
+#define ATAO_CFG3_DOUTEN1 (1 << 2)
+#define ATAO_CFG3_EN2_5V (1 << 1)
+#define ATAO_CFG3_SCANEN (1 << 0)
+#define ATAO_82C53_BASE 0x06
+#define ATAO_CFG1_REG 0x0a
+#define ATAO_CFG1_EXTINT2EN (1 << 15)
+#define ATAO_CFG1_EXTINT1EN (1 << 14)
+#define ATAO_CFG1_CNTINT2EN (1 << 13)
+#define ATAO_CFG1_CNTINT1EN (1 << 12)
+#define ATAO_CFG1_TCINTEN (1 << 11)
+#define ATAO_CFG1_CNT1SRC (1 << 10)
+#define ATAO_CFG1_CNT2SRC (1 << 9)
+#define ATAO_CFG1_FIFOEN (1 << 8)
+#define ATAO_CFG1_GRP2WR (1 << 7)
+#define ATAO_CFG1_EXTUPDEN (1 << 6)
+#define ATAO_CFG1_DMARQ (1 << 5)
+#define ATAO_CFG1_DMAEN (1 << 4)
+#define ATAO_CFG1_CH(x) (((x) & 0xf) << 0)
+#define ATAO_STATUS_REG 0x0a
+#define ATAO_STATUS_FH (1 << 6)
+#define ATAO_STATUS_FE (1 << 5)
+#define ATAO_STATUS_FF (1 << 4)
+#define ATAO_STATUS_INT2 (1 << 3)
+#define ATAO_STATUS_INT1 (1 << 2)
+#define ATAO_STATUS_TCINT (1 << 1)
+#define ATAO_STATUS_PROMOUT (1 << 0)
+#define ATAO_FIFO_WRITE_REG 0x0c
+#define ATAO_FIFO_CLEAR_REG 0x0c
+#define ATAO_AO_REG(x) (0x0c + ((x) * 2))
+
+/* registers with _2_ are accessed when GRP2WR is set in CFG1 */
+#define ATAO_2_DMATCCLR_REG 0x00
+#define ATAO_2_INT1CLR_REG 0x02
+#define ATAO_2_INT2CLR_REG 0x04
+#define ATAO_2_RTSISHFT_REG 0x06
+#define ATAO_2_RTSISHFT_RSI (1 << 0)
+#define ATAO_2_RTSISTRB_REG 0x07
+
+struct atao_board {
+ const char *name;
+ int n_ao_chans;
+};
+
+static const struct atao_board atao_boards[] = {
+ {
+ .name = "at-ao-6",
+ .n_ao_chans = 6,
+ }, {
+ .name = "at-ao-10",
+ .n_ao_chans = 10,
+ },
+};
+
+struct atao_private {
+ unsigned short cfg1;
+ unsigned short cfg3;
+
+ /* Used for caldac readback */
+ unsigned char caldac[21];
+};
+
+static void atao_select_reg_group(struct comedi_device *dev, int group)
+{
+ struct atao_private *devpriv = dev->private;
+
+ if (group)
+ devpriv->cfg1 |= ATAO_CFG1_GRP2WR;
+ else
+ devpriv->cfg1 &= ~ATAO_CFG1_GRP2WR;
+ outw(devpriv->cfg1, dev->iobase + ATAO_CFG1_REG);
+}
+
+static int atao_ao_insn_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int val = s->readback[chan];
+ int i;
+
+ if (chan == 0)
+ atao_select_reg_group(dev, 1);
+
+ for (i = 0; i < insn->n; i++) {
+ val = data[i];
+
+ /* the hardware expects two's complement values */
+ outw(comedi_offset_munge(s, val),
+ dev->iobase + ATAO_AO_REG(chan));
+ }
+ s->readback[chan] = val;
+
+ if (chan == 0)
+ atao_select_reg_group(dev, 0);
+
+ return insn->n;
+}
+
+static int atao_dio_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ if (comedi_dio_update_state(s, data))
+ outw(s->state, dev->iobase + ATAO_DIO_REG);
+
+ data[1] = inw(dev->iobase + ATAO_DIO_REG);
+
+ return insn->n;
+}
+
+static int atao_dio_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct atao_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int mask;
+ int ret;
+
+ if (chan < 4)
+ mask = 0x0f;
+ else
+ mask = 0xf0;
+
+ ret = comedi_dio_insn_config(dev, s, insn, data, mask);
+ if (ret)
+ return ret;
+
+ if (s->io_bits & 0x0f)
+ devpriv->cfg3 |= ATAO_CFG3_DOUTEN1;
+ else
+ devpriv->cfg3 &= ~ATAO_CFG3_DOUTEN1;
+ if (s->io_bits & 0xf0)
+ devpriv->cfg3 |= ATAO_CFG3_DOUTEN2;
+ else
+ devpriv->cfg3 &= ~ATAO_CFG3_DOUTEN2;
+
+ outw(devpriv->cfg3, dev->iobase + ATAO_CFG3_REG);
+
+ return insn->n;
+}
+
+/*
+ * There are three DAC8800 TrimDACs on the board. These are 8-channel,
+ * 8-bit DACs that are used to calibrate the Analog Output channels.
+ * The factory default calibration values are stored in the EEPROM.
+ * The TrimDACs, and EEPROM addresses, are mapped as:
+ *
+ * Channel EEPROM Description
+ * ----------------- ------ -----------------------------------
+ * 0 - DAC0 Chan 0 0x30 AO Channel 0 Offset
+ * 1 - DAC0 Chan 1 0x31 AO Channel 0 Gain
+ * 2 - DAC0 Chan 2 0x32 AO Channel 1 Offset
+ * 3 - DAC0 Chan 3 0x33 AO Channel 1 Gain
+ * 4 - DAC0 Chan 4 0x34 AO Channel 2 Offset
+ * 5 - DAC0 Chan 5 0x35 AO Channel 2 Gain
+ * 6 - DAC0 Chan 6 0x36 AO Channel 3 Offset
+ * 7 - DAC0 Chan 7 0x37 AO Channel 3 Gain
+ * 8 - DAC1 Chan 0 0x38 AO Channel 4 Offset
+ * 9 - DAC1 Chan 1 0x39 AO Channel 4 Gain
+ * 10 - DAC1 Chan 2 0x3a AO Channel 5 Offset
+ * 11 - DAC1 Chan 3 0x3b AO Channel 5 Gain
+ * 12 - DAC1 Chan 4 0x3c 2.5V Offset
+ * 13 - DAC1 Chan 5 0x3d AO Channel 6 Offset (at-ao-10 only)
+ * 14 - DAC1 Chan 6 0x3e AO Channel 6 Gain (at-ao-10 only)
+ * 15 - DAC1 Chan 7 0x3f AO Channel 7 Offset (at-ao-10 only)
+ * 16 - DAC2 Chan 0 0x40 AO Channel 7 Gain (at-ao-10 only)
+ * 17 - DAC2 Chan 1 0x41 AO Channel 8 Offset (at-ao-10 only)
+ * 18 - DAC2 Chan 2 0x42 AO Channel 8 Gain (at-ao-10 only)
+ * 19 - DAC2 Chan 3 0x43 AO Channel 9 Offset (at-ao-10 only)
+ * 20 - DAC2 Chan 4 0x44 AO Channel 9 Gain (at-ao-10 only)
+ * DAC2 Chan 5 0x45 Reserved
+ * DAC2 Chan 6 0x46 Reserved
+ * DAC2 Chan 7 0x47 Reserved
+ */
+static int atao_calib_insn_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int chan = CR_CHAN(insn->chanspec);
+
+ if (insn->n) {
+ unsigned int val = data[insn->n - 1];
+ unsigned int bitstring = ((chan & 0x7) << 8) | val;
+ unsigned int bits;
+ int bit;
+
+ /* write the channel and last data value to the caldac */
+ /* clock the bitstring to the caldac; MSB -> LSB */
+ for (bit = 1 << 10; bit; bit >>= 1) {
+ bits = (bit & bitstring) ? ATAO_CFG2_SDATA : 0;
+
+ outw(bits, dev->iobase + ATAO_CFG2_REG);
+ outw(bits | ATAO_CFG2_SCLK,
+ dev->iobase + ATAO_CFG2_REG);
+ }
+
+ /* strobe the caldac to load the value */
+ outw(ATAO_CFG2_CALLD(chan), dev->iobase + ATAO_CFG2_REG);
+ outw(ATAO_CFG2_CALLD_NOP, dev->iobase + ATAO_CFG2_REG);
+
+ s->readback[chan] = val;
+ }
+
+ return insn->n;
+}
+
+static void atao_reset(struct comedi_device *dev)
+{
+ struct atao_private *devpriv = dev->private;
+
+ /* This is the reset sequence described in the manual */
+
+ devpriv->cfg1 = 0;
+ outw(devpriv->cfg1, dev->iobase + ATAO_CFG1_REG);
+
+ /* Put outputs of counter 1 and counter 2 in a high state */
+ comedi_8254_set_mode(dev->pacer, 0, I8254_MODE4 | I8254_BINARY);
+ comedi_8254_set_mode(dev->pacer, 1, I8254_MODE4 | I8254_BINARY);
+ comedi_8254_write(dev->pacer, 0, 0x0003);
+
+ outw(ATAO_CFG2_CALLD_NOP, dev->iobase + ATAO_CFG2_REG);
+
+ devpriv->cfg3 = 0;
+ outw(devpriv->cfg3, dev->iobase + ATAO_CFG3_REG);
+
+ inw(dev->iobase + ATAO_FIFO_CLEAR_REG);
+
+ atao_select_reg_group(dev, 1);
+ outw(0, dev->iobase + ATAO_2_INT1CLR_REG);
+ outw(0, dev->iobase + ATAO_2_INT2CLR_REG);
+ outw(0, dev->iobase + ATAO_2_DMATCCLR_REG);
+ atao_select_reg_group(dev, 0);
+}
+
+static int atao_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+{
+ const struct atao_board *board = dev->board_ptr;
+ struct atao_private *devpriv;
+ struct comedi_subdevice *s;
+ int ret;
+
+ ret = comedi_request_region(dev, it->options[0], 0x20);
+ if (ret)
+ return ret;
+
+ devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+ if (!devpriv)
+ return -ENOMEM;
+
+ dev->pacer = comedi_8254_init(dev->iobase + ATAO_82C53_BASE,
+ 0, I8254_IO8, 0);
+ if (!dev->pacer)
+ return -ENOMEM;
+
+ ret = comedi_alloc_subdevices(dev, 4);
+ if (ret)
+ return ret;
+
+ /* Analog Output subdevice */
+ s = &dev->subdevices[0];
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = board->n_ao_chans;
+ s->maxdata = 0x0fff;
+ s->range_table = it->options[3] ? &range_unipolar10 : &range_bipolar10;
+ s->insn_write = atao_ao_insn_write;
+
+ ret = comedi_alloc_subdev_readback(s);
+ if (ret)
+ return ret;
+
+ /* Digital I/O subdevice */
+ s = &dev->subdevices[1];
+ s->type = COMEDI_SUBD_DIO;
+ s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+ s->n_chan = 8;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = atao_dio_insn_bits;
+ s->insn_config = atao_dio_insn_config;
+
+ /* caldac subdevice */
+ s = &dev->subdevices[2];
+ s->type = COMEDI_SUBD_CALIB;
+ s->subdev_flags = SDF_WRITABLE | SDF_INTERNAL;
+ s->n_chan = (board->n_ao_chans * 2) + 1;
+ s->maxdata = 0xff;
+ s->insn_write = atao_calib_insn_write;
+
+ ret = comedi_alloc_subdev_readback(s);
+ if (ret)
+ return ret;
+
+ /* EEPROM subdevice */
+ s = &dev->subdevices[3];
+ s->type = COMEDI_SUBD_UNUSED;
+
+ atao_reset(dev);
+
+ return 0;
+}
+
+static struct comedi_driver ni_at_ao_driver = {
+ .driver_name = "ni_at_ao",
+ .module = THIS_MODULE,
+ .attach = atao_attach,
+ .detach = comedi_legacy_detach,
+ .board_name = &atao_boards[0].name,
+ .offset = sizeof(struct atao_board),
+ .num_names = ARRAY_SIZE(atao_boards),
+};
+module_comedi_driver(ni_at_ao_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi driver for NI AT-AO-6/10 boards");
+MODULE_LICENSE("GPL");
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