Initial import

1 files changed, 474 insertions, 0 deletions

diff --git a/drivers/staging/comedi/drivers/dt2811.c b/drivers/staging/comedi/drivers/dt2811.c
new file mode 100644
index 000000000..a80773291
--- /dev/null
+++ b/drivers/staging/comedi/drivers/dt2811.c
@@ -0,0 +1,474 @@
+/*
+   comedi/drivers/dt2811.c
+   Hardware driver for Data Translation DT2811
+
+   COMEDI - Linux Control and Measurement Device Interface
+   History:
+   Base Version  - David A. Schleef <ds@schleef.org>
+   December 1998 - Updated to work.  David does not have a DT2811
+   board any longer so this was suffering from bitrot.
+   Updated performed by ...
+
+   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: dt2811
+Description: Data Translation DT2811
+Author: ds
+Devices: [Data Translation] DT2811-PGL (dt2811-pgl), DT2811-PGH (dt2811-pgh)
+Status: works
+
+Configuration options:
+  [0] - I/O port base address
+  [1] - IRQ, although this is currently unused
+  [2] - A/D reference
+	  0 = signle-ended
+	  1 = differential
+	  2 = pseudo-differential (common reference)
+  [3] - A/D range
+	  0 = [-5, 5]
+	  1 = [-2.5, 2.5]
+	  2 = [0, 5]
+  [4] - D/A 0 range (same choices)
+  [4] - D/A 1 range (same choices)
+*/
+
+#include <linux/module.h>
+#include "../comedidev.h"
+
+static const struct comedi_lrange range_dt2811_pgh_ai_5_unipolar = {
+	4, {
+		UNI_RANGE(5),
+		UNI_RANGE(2.5),
+		UNI_RANGE(1.25),
+		UNI_RANGE(0.625)
+	}
+};
+
+static const struct comedi_lrange range_dt2811_pgh_ai_2_5_bipolar = {
+	4, {
+		BIP_RANGE(2.5),
+		BIP_RANGE(1.25),
+		BIP_RANGE(0.625),
+		BIP_RANGE(0.3125)
+	}
+};
+
+static const struct comedi_lrange range_dt2811_pgh_ai_5_bipolar = {
+	4, {
+		BIP_RANGE(5),
+		BIP_RANGE(2.5),
+		BIP_RANGE(1.25),
+		BIP_RANGE(0.625)
+	}
+};
+
+static const struct comedi_lrange range_dt2811_pgl_ai_5_unipolar = {
+	4, {
+		UNI_RANGE(5),
+		UNI_RANGE(0.5),
+		UNI_RANGE(0.05),
+		UNI_RANGE(0.01)
+	}
+};
+
+static const struct comedi_lrange range_dt2811_pgl_ai_2_5_bipolar = {
+	4, {
+		BIP_RANGE(2.5),
+		BIP_RANGE(0.25),
+		BIP_RANGE(0.025),
+		BIP_RANGE(0.005)
+	}
+};
+
+static const struct comedi_lrange range_dt2811_pgl_ai_5_bipolar = {
+	4, {
+		BIP_RANGE(5),
+		BIP_RANGE(0.5),
+		BIP_RANGE(0.05),
+		BIP_RANGE(0.01)
+	}
+};
+
+/*
+
+   0x00    ADCSR R/W  A/D Control/Status Register
+   bit 7 - (R) 1 indicates A/D conversion done
+   reading ADDAT clears bit
+   (W) ignored
+   bit 6 - (R) 1 indicates A/D error
+   (W) ignored
+   bit 5 - (R) 1 indicates A/D busy, cleared at end
+   of conversion
+   (W) ignored
+   bit 4 - (R) 0
+   (W)
+   bit 3 - (R) 0
+   bit 2 - (R/W) 1 indicates interrupts enabled
+   bits 1,0 - (R/W) mode bits
+   00  single conversion on ADGCR load
+   01  continuous conversion, internal clock,
+   (clock enabled on ADGCR load)
+   10  continuous conversion, internal clock,
+   external trigger
+   11  continuous conversion, external clock,
+   external trigger
+
+   0x01    ADGCR R/W A/D Gain/Channel Register
+   bit 6,7 - (R/W) gain select
+   00  gain=1, both PGH, PGL models
+   01  gain=2 PGH, 10 PGL
+   10  gain=4 PGH, 100 PGL
+   11  gain=8 PGH, 500 PGL
+   bit 4,5 - reserved
+   bit 3-0 - (R/W) channel select
+   channel number from 0-15
+
+   0x02,0x03 (R) ADDAT A/D Data Register
+   (W) DADAT0 D/A Data Register 0
+   0x02 low byte
+   0x03 high byte
+
+   0x04,0x05 (W) DADAT0 D/A Data Register 1
+
+   0x06 (R) DIO0 Digital Input Port 0
+   (W) DIO1 Digital Output Port 1
+
+   0x07 TMRCTR (R/W) Timer/Counter Register
+   bits 6,7 - reserved
+   bits 5-3 - Timer frequency control (mantissa)
+   543  divisor  freqency (kHz)
+   000  1        600
+   001  10       60
+   010  2        300
+   011  3        200
+   100  4        150
+   101  5        120
+   110  6        100
+   111  12       50
+   bits 2-0 - Timer frequency control (exponent)
+   210  multiply divisor/divide frequency by
+   000  1
+   001  10
+   010  100
+   011  1000
+   100  10000
+   101  100000
+   110  1000000
+   111  10000000
+
+ */
+
+#define TIMEOUT 10000
+
+#define DT2811_ADCSR 0
+#define DT2811_ADGCR 1
+#define DT2811_ADDATLO 2
+#define DT2811_ADDATHI 3
+#define DT2811_DADAT0LO 2
+#define DT2811_DADAT0HI 3
+#define DT2811_DADAT1LO 4
+#define DT2811_DADAT1HI 5
+#define DT2811_DIO 6
+#define DT2811_TMRCTR 7
+
+/*
+ * flags
+ */
+
+/* ADCSR */
+
+#define DT2811_ADDONE   0x80
+#define DT2811_ADERROR  0x40
+#define DT2811_ADBUSY   0x20
+#define DT2811_CLRERROR 0x10
+#define DT2811_INTENB   0x04
+#define DT2811_ADMODE   0x03
+
+struct dt2811_board {
+	const char *name;
+	const struct comedi_lrange *bip_5;
+	const struct comedi_lrange *bip_2_5;
+	const struct comedi_lrange *unip_5;
+};
+
+enum { card_2811_pgh, card_2811_pgl };
+
+struct dt2811_private {
+	int ntrig;
+	int curadchan;
+	enum {
+		adc_singleended, adc_diff, adc_pseudo_diff
+	} adc_mux;
+	enum {
+		dac_bipolar_5, dac_bipolar_2_5, dac_unipolar_5
+	} dac_range[2];
+	const struct comedi_lrange *range_type_list[2];
+};
+
+static const struct comedi_lrange *dac_range_types[] = {
+	&range_bipolar5,
+	&range_bipolar2_5,
+	&range_unipolar5
+};
+
+static int dt2811_ai_eoc(struct comedi_device *dev,
+			 struct comedi_subdevice *s,
+			 struct comedi_insn *insn,
+			 unsigned long context)
+{
+	unsigned int status;
+
+	status = inb(dev->iobase + DT2811_ADCSR);
+	if ((status & DT2811_ADBUSY) == 0)
+		return 0;
+	return -EBUSY;
+}
+
+static int dt2811_ai_insn(struct comedi_device *dev, struct comedi_subdevice *s,
+			  struct comedi_insn *insn, unsigned int *data)
+{
+	int chan = CR_CHAN(insn->chanspec);
+	int ret;
+	int i;
+
+	for (i = 0; i < insn->n; i++) {
+		outb(chan, dev->iobase + DT2811_ADGCR);
+
+		ret = comedi_timeout(dev, s, insn, dt2811_ai_eoc, 0);
+		if (ret)
+			return ret;
+
+		data[i] = inb(dev->iobase + DT2811_ADDATLO);
+		data[i] |= inb(dev->iobase + DT2811_ADDATHI) << 8;
+		data[i] &= 0xfff;
+	}
+
+	return i;
+}
+
+static int dt2811_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;
+
+	for (i = 0; i < insn->n; i++) {
+		val = data[i];
+		outb(val & 0xff, dev->iobase + DT2811_DADAT0LO + 2 * chan);
+		outb((val >> 8) & 0xff,
+		     dev->iobase + DT2811_DADAT0HI + 2 * chan);
+	}
+	s->readback[chan] = val;
+
+	return insn->n;
+}
+
+static int dt2811_di_insn_bits(struct comedi_device *dev,
+			       struct comedi_subdevice *s,
+			       struct comedi_insn *insn, unsigned int *data)
+{
+	data[1] = inb(dev->iobase + DT2811_DIO);
+
+	return insn->n;
+}
+
+static int dt2811_do_insn_bits(struct comedi_device *dev,
+			       struct comedi_subdevice *s,
+			       struct comedi_insn *insn,
+			       unsigned int *data)
+{
+	if (comedi_dio_update_state(s, data))
+		outb(s->state, dev->iobase + DT2811_DIO);
+
+	data[1] = s->state;
+
+	return insn->n;
+}
+
+/*
+  options[0]   Board base address
+  options[1]   IRQ
+  options[2]   Input configuration
+		 0 == single-ended
+		 1 == differential
+		 2 == pseudo-differential
+  options[3]   Analog input range configuration
+		 0 == bipolar 5  (-5V -- +5V)
+		 1 == bipolar 2.5V  (-2.5V -- +2.5V)
+		 2 == unipolar 5V  (0V -- +5V)
+  options[4]   Analog output 0 range configuration
+		 0 == bipolar 5  (-5V -- +5V)
+		 1 == bipolar 2.5V  (-2.5V -- +2.5V)
+		 2 == unipolar 5V  (0V -- +5V)
+  options[5]   Analog output 1 range configuration
+		 0 == bipolar 5  (-5V -- +5V)
+		 1 == bipolar 2.5V  (-2.5V -- +2.5V)
+		 2 == unipolar 5V  (0V -- +5V)
+*/
+static int dt2811_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+{
+	/* int i; */
+	const struct dt2811_board *board = dev->board_ptr;
+	struct dt2811_private *devpriv;
+	int ret;
+	struct comedi_subdevice *s;
+
+	ret = comedi_request_region(dev, it->options[0], 0x8);
+	if (ret)
+		return ret;
+
+#if 0
+	outb(0, dev->iobase + DT2811_ADCSR);
+	udelay(100);
+	i = inb(dev->iobase + DT2811_ADDATLO);
+	i = inb(dev->iobase + DT2811_ADDATHI);
+#endif
+
+	ret = comedi_alloc_subdevices(dev, 4);
+	if (ret)
+		return ret;
+
+	devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+	if (!devpriv)
+		return -ENOMEM;
+
+	switch (it->options[2]) {
+	case 0:
+		devpriv->adc_mux = adc_singleended;
+		break;
+	case 1:
+		devpriv->adc_mux = adc_diff;
+		break;
+	case 2:
+		devpriv->adc_mux = adc_pseudo_diff;
+		break;
+	default:
+		devpriv->adc_mux = adc_singleended;
+		break;
+	}
+	switch (it->options[4]) {
+	case 0:
+		devpriv->dac_range[0] = dac_bipolar_5;
+		break;
+	case 1:
+		devpriv->dac_range[0] = dac_bipolar_2_5;
+		break;
+	case 2:
+		devpriv->dac_range[0] = dac_unipolar_5;
+		break;
+	default:
+		devpriv->dac_range[0] = dac_bipolar_5;
+		break;
+	}
+	switch (it->options[5]) {
+	case 0:
+		devpriv->dac_range[1] = dac_bipolar_5;
+		break;
+	case 1:
+		devpriv->dac_range[1] = dac_bipolar_2_5;
+		break;
+	case 2:
+		devpriv->dac_range[1] = dac_unipolar_5;
+		break;
+	default:
+		devpriv->dac_range[1] = dac_bipolar_5;
+		break;
+	}
+
+	s = &dev->subdevices[0];
+	/* initialize the ADC subdevice */
+	s->type = COMEDI_SUBD_AI;
+	s->subdev_flags = SDF_READABLE | SDF_GROUND;
+	s->n_chan = devpriv->adc_mux == adc_diff ? 8 : 16;
+	s->insn_read = dt2811_ai_insn;
+	s->maxdata = 0xfff;
+	switch (it->options[3]) {
+	case 0:
+	default:
+		s->range_table = board->bip_5;
+		break;
+	case 1:
+		s->range_table = board->bip_2_5;
+		break;
+	case 2:
+		s->range_table = board->unip_5;
+		break;
+	}
+
+	s = &dev->subdevices[1];
+	/* ao subdevice */
+	s->type = COMEDI_SUBD_AO;
+	s->subdev_flags = SDF_WRITABLE;
+	s->n_chan = 2;
+	s->maxdata = 0xfff;
+	s->range_table_list = devpriv->range_type_list;
+	devpriv->range_type_list[0] = dac_range_types[devpriv->dac_range[0]];
+	devpriv->range_type_list[1] = dac_range_types[devpriv->dac_range[1]];
+	s->insn_write = dt2811_ao_insn_write;
+
+	ret = comedi_alloc_subdev_readback(s);
+	if (ret)
+		return ret;
+
+	s = &dev->subdevices[2];
+	/* di subdevice */
+	s->type = COMEDI_SUBD_DI;
+	s->subdev_flags = SDF_READABLE;
+	s->n_chan = 8;
+	s->insn_bits = dt2811_di_insn_bits;
+	s->maxdata = 1;
+	s->range_table = &range_digital;
+
+	s = &dev->subdevices[3];
+	/* do subdevice */
+	s->type = COMEDI_SUBD_DO;
+	s->subdev_flags = SDF_WRITABLE;
+	s->n_chan = 8;
+	s->insn_bits = dt2811_do_insn_bits;
+	s->maxdata = 1;
+	s->state = 0;
+	s->range_table = &range_digital;
+
+	return 0;
+}
+
+static const struct dt2811_board boardtypes[] = {
+	{
+		.name		= "dt2811-pgh",
+		.bip_5		= &range_dt2811_pgh_ai_5_bipolar,
+		.bip_2_5	= &range_dt2811_pgh_ai_2_5_bipolar,
+		.unip_5		= &range_dt2811_pgh_ai_5_unipolar,
+	}, {
+		.name		= "dt2811-pgl",
+		.bip_5		= &range_dt2811_pgl_ai_5_bipolar,
+		.bip_2_5	= &range_dt2811_pgl_ai_2_5_bipolar,
+		.unip_5		= &range_dt2811_pgl_ai_5_unipolar,
+	},
+};
+
+static struct comedi_driver dt2811_driver = {
+	.driver_name	= "dt2811",
+	.module		= THIS_MODULE,
+	.attach		= dt2811_attach,
+	.detach		= comedi_legacy_detach,
+	.board_name	= &boardtypes[0].name,
+	.num_names	= ARRAY_SIZE(boardtypes),
+	.offset		= sizeof(struct dt2811_board),
+};
+module_comedi_driver(dt2811_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_LICENSE("GPL");