/*
- 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.
+ * Comedi driver for Data Translation DT2811
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 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: 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)
-*/
+ * 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 (optional, needed for async command support)
+ * [2] - A/D reference (# of analog inputs)
+ * 0 = single-ended (16 channels)
+ * 1 = differential (8 channels)
+ * 2 = pseudo-differential (16 channels)
+ * [3] - A/D range (deprecated, see below)
+ * [4] - D/A 0 range (deprecated, see below)
+ * [5] - D/A 1 range (deprecated, see below)
+ *
+ * Notes:
+ * - A/D ranges are not programmable but the gain is. The AI subdevice has
+ * a range_table containing all the possible analog input range/gain
+ * options for the dt2811-pgh or dt2811-pgl. Use the range that matches
+ * your board configuration and the desired gain to correctly convert
+ * between data values and physical units and to set the correct output
+ * gain.
+ * - D/A ranges are not programmable. The AO subdevice has a range_table
+ * containing all the possible analog output ranges. Use the range
+ * that matches your board configuration to convert between data
+ * values and physical units.
+ */
#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/delay.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)
- }
+/*
+ * Register I/O map
+ */
+#define DT2811_ADCSR_REG 0x00 /* r/w A/D Control/Status */
+#define DT2811_ADCSR_ADDONE BIT(7) /* r 1=A/D conv done */
+#define DT2811_ADCSR_ADERROR BIT(6) /* r 1=A/D error */
+#define DT2811_ADCSR_ADBUSY BIT(5) /* r 1=A/D busy */
+#define DT2811_ADCSR_CLRERROR BIT(4)
+#define DT2811_ADCSR_DMAENB BIT(3) /* r/w 1=dma ena */
+#define DT2811_ADCSR_INTENB BIT(2) /* r/w 1=interupts ena */
+#define DT2811_ADCSR_ADMODE(x) (((x) & 0x3) << 0)
+
+#define DT2811_ADGCR_REG 0x01 /* r/w A/D Gain/Channel */
+#define DT2811_ADGCR_GAIN(x) (((x) & 0x3) << 6)
+#define DT2811_ADGCR_CHAN(x) (((x) & 0xf) << 0)
+
+#define DT2811_ADDATA_LO_REG 0x02 /* r A/D Data low byte */
+#define DT2811_ADDATA_HI_REG 0x03 /* r A/D Data high byte */
+
+#define DT2811_DADATA_LO_REG(x) (0x02 + ((x) * 2)) /* w D/A Data low */
+#define DT2811_DADATA_HI_REG(x) (0x03 + ((x) * 2)) /* w D/A Data high */
+
+#define DT2811_DI_REG 0x06 /* r Digital Input Port 0 */
+#define DT2811_DO_REG 0x06 /* w Digital Output Port 1 */
+
+#define DT2811_TMRCTR_REG 0x07 /* r/w Timer/Counter */
+#define DT2811_TMRCTR_MANTISSA(x) (((x) & 0x7) << 3)
+#define DT2811_TMRCTR_EXPONENT(x) (((x) & 0x7) << 0)
+
+#define DT2811_OSC_BASE 1666 /* 600 kHz = 1666.6667ns */
+
+/*
+ * Timer frequency control:
+ * DT2811_TMRCTR_MANTISSA DT2811_TMRCTR_EXPONENT
+ * val divisor frequency val multiply divisor/divide frequency by
+ * 0 1 600 kHz 0 1
+ * 1 10 60 kHz 1 10
+ * 2 2 300 kHz 2 100
+ * 3 3 200 kHz 3 1000
+ * 4 4 150 kHz 4 10000
+ * 5 5 120 kHz 5 100000
+ * 6 6 100 kHz 6 1000000
+ * 7 12 50 kHz 7 10000000
+ */
+const unsigned int dt2811_clk_dividers[] = {
+ 1, 10, 2, 3, 4, 5, 6, 12
};
-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)
- }
+const unsigned int dt2811_clk_multipliers[] = {
+ 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
};
-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)
+/*
+ * The Analog Input range is set using jumpers on the board.
+ *
+ * Input Range W9 W10
+ * -5V to +5V In Out
+ * -2.5V to +2.5V In In
+ * 0V to +5V Out In
+ *
+ * The gain may be set to 1, 2, 4, or 8 (on the dt2811-pgh) or to
+ * 1, 10, 100, 500 (on the dt2811-pgl).
+ */
+static const struct comedi_lrange dt2811_pgh_ai_ranges = {
+ 12, {
+ BIP_RANGE(5), /* range 0: gain=1 */
+ BIP_RANGE(2.5), /* range 1: gain=2 */
+ BIP_RANGE(1.25), /* range 2: gain=4 */
+ BIP_RANGE(0.625), /* range 3: gain=8 */
+
+ BIP_RANGE(2.5), /* range 0+4: gain=1 */
+ BIP_RANGE(1.25), /* range 1+4: gain=2 */
+ BIP_RANGE(0.625), /* range 2+4: gain=4 */
+ BIP_RANGE(0.3125), /* range 3+4: gain=8 */
+
+ UNI_RANGE(5), /* range 0+8: gain=1 */
+ UNI_RANGE(2.5), /* range 1+8: gain=2 */
+ UNI_RANGE(1.25), /* range 2+8: gain=4 */
+ UNI_RANGE(0.625) /* range 3+8: gain=8 */
}
};
-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 dt2811_pgl_ai_ranges = {
+ 12, {
+ BIP_RANGE(5), /* range 0: gain=1 */
+ BIP_RANGE(0.5), /* range 1: gain=10 */
+ BIP_RANGE(0.05), /* range 2: gain=100 */
+ BIP_RANGE(0.01), /* range 3: gain=500 */
+
+ BIP_RANGE(2.5), /* range 0+4: gain=1 */
+ BIP_RANGE(0.25), /* range 1+4: gain=10 */
+ BIP_RANGE(0.025), /* range 2+4: gain=100 */
+ BIP_RANGE(0.005), /* range 3+4: gain=500 */
+
+ UNI_RANGE(5), /* range 0+8: gain=1 */
+ UNI_RANGE(0.5), /* range 1+8: gain=10 */
+ UNI_RANGE(0.05), /* range 2+8: gain=100 */
+ UNI_RANGE(0.01) /* range 3+8: gain=500 */
}
};
-static const struct comedi_lrange range_dt2811_pgl_ai_2_5_bipolar = {
- 4, {
+/*
+ * The Analog Output range is set per-channel using jumpers on the board.
+ *
+ * DAC0 Jumpers DAC1 Jumpers
+ * Output Range W5 W6 W7 W8 W1 W2 W3 W4
+ * -5V to +5V In Out In Out In Out In Out
+ * -2.5V to +2.5V In Out Out In In Out Out In
+ * 0 to +5V Out In Out In Out In Out In
+ */
+static const struct comedi_lrange dt2811_ao_ranges = {
+ 3, {
+ BIP_RANGE(5), /* default setting from factory */
BIP_RANGE(2.5),
- BIP_RANGE(0.25),
- BIP_RANGE(0.025),
- BIP_RANGE(0.005)
+ UNI_RANGE(5)
}
};
-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)
- }
+struct dt2811_board {
+ const char *name;
+ unsigned int is_pgh:1;
};
-/*
+static const struct dt2811_board dt2811_boards[] = {
+ {
+ .name = "dt2811-pgh",
+ .is_pgh = 1,
+ }, {
+ .name = "dt2811-pgl",
+ },
+};
- 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
+struct dt2811_private {
+ unsigned int ai_divisor;
+};
- */
+static unsigned int dt2811_ai_read_sample(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ unsigned int val;
-#define TIMEOUT 10000
+ val = inb(dev->iobase + DT2811_ADDATA_LO_REG) |
+ (inb(dev->iobase + DT2811_ADDATA_HI_REG) << 8);
-#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
+ return val & s->maxdata;
+}
-/*
- * flags
- */
+static irqreturn_t dt2811_interrupt(int irq, void *d)
+{
+ struct comedi_device *dev = d;
+ struct comedi_subdevice *s = dev->read_subdev;
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+ unsigned int status;
-/* ADCSR */
+ if (!dev->attached)
+ return IRQ_NONE;
-#define DT2811_ADDONE 0x80
-#define DT2811_ADERROR 0x40
-#define DT2811_ADBUSY 0x20
-#define DT2811_CLRERROR 0x10
-#define DT2811_INTENB 0x04
-#define DT2811_ADMODE 0x03
+ status = inb(dev->iobase + DT2811_ADCSR_REG);
-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;
-};
+ if (status & DT2811_ADCSR_ADERROR) {
+ async->events |= COMEDI_CB_OVERFLOW;
-enum { card_2811_pgh, card_2811_pgl };
+ outb(status | DT2811_ADCSR_CLRERROR,
+ dev->iobase + DT2811_ADCSR_REG);
+ }
-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];
-};
+ if (status & DT2811_ADCSR_ADDONE) {
+ unsigned short val;
-static const struct comedi_lrange *dac_range_types[] = {
- &range_bipolar5,
- &range_bipolar2_5,
- &range_unipolar5
-};
+ val = dt2811_ai_read_sample(dev, s);
+ comedi_buf_write_samples(s, &val, 1);
+ }
+
+ if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg)
+ async->events |= COMEDI_CB_EOA;
+
+ comedi_handle_events(dev, s);
+
+ return IRQ_HANDLED;
+}
+
+static int dt2811_ai_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ /*
+ * Mode 0
+ * Single conversion
+ *
+ * Loading a chanspec will trigger a conversion.
+ */
+ outb(DT2811_ADCSR_ADMODE(0), dev->iobase + DT2811_ADCSR_REG);
+
+ return 0;
+}
+
+static void dt2811_ai_set_chanspec(struct comedi_device *dev,
+ unsigned int chanspec)
+{
+ unsigned int chan = CR_CHAN(chanspec);
+ unsigned int range = CR_RANGE(chanspec);
+
+ outb(DT2811_ADGCR_CHAN(chan) | DT2811_ADGCR_GAIN(range),
+ dev->iobase + DT2811_ADGCR_REG);
+}
+
+static int dt2811_ai_cmd(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct dt2811_private *devpriv = dev->private;
+ struct comedi_cmd *cmd = &s->async->cmd;
+ unsigned int mode;
+
+ if (cmd->start_src == TRIG_NOW) {
+ /*
+ * Mode 1
+ * Continuous conversion, internal trigger and clock
+ *
+ * This resets the trigger flip-flop, disabling A/D strobes.
+ * The timer/counter register is loaded with the division
+ * ratio which will give the required sample rate.
+ *
+ * Loading the first chanspec sets the trigger flip-flop,
+ * enabling the timer/counter. A/D strobes are then generated
+ * at the rate set by the internal clock/divider.
+ */
+ mode = DT2811_ADCSR_ADMODE(1);
+ } else { /* TRIG_EXT */
+ if (cmd->convert_src == TRIG_TIMER) {
+ /*
+ * Mode 2
+ * Continuous conversion, external trigger
+ *
+ * Similar to Mode 1, with the exception that the
+ * trigger flip-flop must be set by a negative edge
+ * on the external trigger input.
+ */
+ mode = DT2811_ADCSR_ADMODE(2);
+ } else { /* TRIG_EXT */
+ /*
+ * Mode 3
+ * Continuous conversion, external trigger, clock
+ *
+ * Similar to Mode 2, with the exception that the
+ * conversion rate is set by the frequency on the
+ * external clock/divider.
+ */
+ mode = DT2811_ADCSR_ADMODE(3);
+ }
+ }
+ outb(mode | DT2811_ADCSR_INTENB, dev->iobase + DT2811_ADCSR_REG);
+
+ /* load timer */
+ outb(devpriv->ai_divisor, dev->iobase + DT2811_TMRCTR_REG);
+
+ /* load chanspec - enables timer */
+ dt2811_ai_set_chanspec(dev, cmd->chanlist[0]);
+
+ return 0;
+}
+
+static unsigned int dt2811_ns_to_timer(unsigned int *nanosec,
+ unsigned int flags)
+{
+ unsigned long long ns = *nanosec;
+ unsigned int ns_lo = COMEDI_MIN_SPEED;
+ unsigned int ns_hi = 0;
+ unsigned int divisor_hi = 0;
+ unsigned int divisor_lo = 0;
+ unsigned int _div;
+ unsigned int _mult;
+
+ /*
+ * Work through all the divider/multiplier values to find the two
+ * closest divisors to generate the requested nanosecond timing.
+ */
+ for (_div = 0; _div <= 7; _div++) {
+ for (_mult = 0; _mult <= 7; _mult++) {
+ unsigned int div = dt2811_clk_dividers[_div];
+ unsigned int mult = dt2811_clk_multipliers[_mult];
+ unsigned long long divider = div * mult;
+ unsigned int divisor = DT2811_TMRCTR_MANTISSA(_div) |
+ DT2811_TMRCTR_EXPONENT(_mult);
+
+ /*
+ * The timer can be configured to run at a slowest
+ * speed of 0.005hz (600 Khz/120000000), which requires
+ * 37-bits to represent the nanosecond value. Limit the
+ * slowest timing to what comedi handles (32-bits).
+ */
+ ns = divider * DT2811_OSC_BASE;
+ if (ns > COMEDI_MIN_SPEED)
+ continue;
+
+ /* Check for fastest found timing */
+ if (ns <= *nanosec && ns > ns_hi) {
+ ns_hi = ns;
+ divisor_hi = divisor;
+ }
+ /* Check for slowest found timing */
+ if (ns >= *nanosec && ns < ns_lo) {
+ ns_lo = ns;
+ divisor_lo = divisor;
+ }
+ }
+ }
+
+ /*
+ * The slowest found timing will be invalid if the requested timing
+ * is faster than what can be generated by the timer. Fix it so that
+ * CMDF_ROUND_UP returns valid timing.
+ */
+ if (ns_lo == COMEDI_MIN_SPEED) {
+ ns_lo = ns_hi;
+ divisor_lo = divisor_hi;
+ }
+ /*
+ * The fastest found timing will be invalid if the requested timing
+ * is less than what can be generated by the timer. Fix it so that
+ * CMDF_ROUND_NEAREST and CMDF_ROUND_DOWN return valid timing.
+ */
+ if (ns_hi == 0) {
+ ns_hi = ns_lo;
+ divisor_hi = divisor_lo;
+ }
+
+ switch (flags & CMDF_ROUND_MASK) {
+ case CMDF_ROUND_NEAREST:
+ default:
+ if (ns_hi - *nanosec < *nanosec - ns_lo) {
+ *nanosec = ns_lo;
+ return divisor_lo;
+ }
+ *nanosec = ns_hi;
+ return divisor_hi;
+ case CMDF_ROUND_UP:
+ *nanosec = ns_lo;
+ return divisor_lo;
+ case CMDF_ROUND_DOWN:
+ *nanosec = ns_hi;
+ return divisor_hi;
+ }
+}
+
+static int dt2811_ai_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ struct dt2811_private *devpriv = dev->private;
+ unsigned int arg;
+ int err = 0;
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT);
+ err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
+ err |= comedi_check_trigger_src(&cmd->convert_src,
+ TRIG_TIMER | TRIG_EXT);
+ err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+ err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
+
+ if (err)
+ return 1;
+
+ /* Step 2a : make sure trigger sources are unique */
+
+ err |= comedi_check_trigger_is_unique(cmd->start_src);
+ err |= comedi_check_trigger_is_unique(cmd->convert_src);
+ err |= comedi_check_trigger_is_unique(cmd->stop_src);
+
+ /* Step 2b : and mutually compatible */
+
+ if (cmd->convert_src == TRIG_EXT && cmd->start_src != TRIG_EXT)
+ err |= -EINVAL;
+
+ if (err)
+ return 2;
+
+ /* Step 3: check if arguments are trivially valid */
+
+ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
+ if (cmd->convert_src == TRIG_TIMER)
+ err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 12500);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
+ cmd->chanlist_len);
+ if (cmd->stop_src == TRIG_COUNT)
+ err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
+ else /* TRIG_NONE */
+ err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
+
+ if (err)
+ return 3;
+
+ /* Step 4: fix up any arguments */
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ arg = cmd->convert_arg;
+ devpriv->ai_divisor = dt2811_ns_to_timer(&arg, cmd->flags);
+ err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
+ } else { /* TRIG_EXT */
+ /* The convert_arg is used to set the divisor. */
+ devpriv->ai_divisor = cmd->convert_arg;
+ }
+
+ if (err)
+ return 4;
+
+ /* Step 5: check channel list if it exists */
+
+ return 0;
+}
static int dt2811_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
{
unsigned int status;
- status = inb(dev->iobase + DT2811_ADCSR);
- if ((status & DT2811_ADBUSY) == 0)
+ status = inb(dev->iobase + DT2811_ADCSR_REG);
+ if ((status & DT2811_ADCSR_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)
+static int dt2811_ai_insn_read(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;
+ /* We will already be in Mode 0 */
for (i = 0; i < insn->n; i++) {
- outb(chan, dev->iobase + DT2811_ADGCR);
+ /* load chanspec and trigger conversion */
+ dt2811_ai_set_chanspec(dev, insn->chanspec);
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;
+ data[i] = dt2811_ai_read_sample(dev, s);
}
- return i;
+ return insn->n;
}
static int dt2811_ao_insn_write(struct comedi_device *dev,
for (i = 0; i < insn->n; i++) {
val = data[i];
- outb(val & 0xff, dev->iobase + DT2811_DADAT0LO + 2 * chan);
+ outb(val & 0xff, dev->iobase + DT2811_DADATA_LO_REG(chan));
outb((val >> 8) & 0xff,
- dev->iobase + DT2811_DADAT0HI + 2 * chan);
+ dev->iobase + DT2811_DADATA_HI_REG(chan));
}
s->readback[chan] = val;
static int dt2811_di_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+ struct comedi_insn *insn,
+ unsigned int *data)
{
- data[1] = inb(dev->iobase + DT2811_DIO);
+ data[1] = inb(dev->iobase + DT2811_DI_REG);
return insn->n;
}
unsigned int *data)
{
if (comedi_dio_update_state(s, data))
- outb(s->state, dev->iobase + DT2811_DIO);
+ outb(s->state, dev->iobase + DT2811_DO_REG);
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 void dt2811_reset(struct comedi_device *dev)
+{
+ /* This is the initialization sequence from the users manual */
+ outb(DT2811_ADCSR_ADMODE(0), dev->iobase + DT2811_ADCSR_REG);
+ usleep_range(100, 1000);
+ inb(dev->iobase + DT2811_ADDATA_LO_REG);
+ inb(dev->iobase + DT2811_ADDATA_HI_REG);
+ outb(DT2811_ADCSR_ADMODE(0) | DT2811_ADCSR_CLRERROR,
+ dev->iobase + DT2811_ADCSR_REG);
+}
+
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;
+ int ret;
+
+ devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+ if (!devpriv)
+ return -ENOMEM;
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
+ dt2811_reset(dev);
+
+ /* IRQ's 2,3,5,7 are valid for async command support */
+ if (it->options[1] <= 7 && (BIT(it->options[1]) & 0xac)) {
+ ret = request_irq(it->options[1], dt2811_interrupt, 0,
+ dev->board_name, dev);
+ if (ret == 0)
+ dev->irq = it->options[1];
+ }
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;
- }
-
+ /* Analog Input subdevice */
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->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE |
+ (it->options[2] == 1) ? SDF_DIFF :
+ (it->options[2] == 2) ? SDF_COMMON : SDF_GROUND;
+ s->n_chan = (it->options[2] == 1) ? 8 : 16;
+ s->maxdata = 0x0fff;
+ s->range_table = board->is_pgh ? &dt2811_pgh_ai_ranges
+ : &dt2811_pgl_ai_ranges;
+ s->insn_read = dt2811_ai_insn_read;
+ if (dev->irq) {
+ dev->read_subdev = s;
+ s->subdev_flags |= SDF_CMD_READ;
+ s->len_chanlist = 1;
+ s->do_cmdtest = dt2811_ai_cmdtest;
+ s->do_cmd = dt2811_ai_cmd;
+ s->cancel = dt2811_ai_cancel;
}
+ /* Analog Output subdevice */
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;
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 2;
+ s->maxdata = 0x0fff;
+ s->range_table = &dt2811_ao_ranges;
+ s->insn_write = dt2811_ao_insn_write;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
+ /* Digital Input subdevice */
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->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 8;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = dt2811_di_insn_bits;
+
+ /* Digital Output subdevice */
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;
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 8;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = dt2811_do_insn_bits;
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),
+ .board_name = &dt2811_boards[0].name,
+ .num_names = ARRAY_SIZE(dt2811_boards),
.offset = sizeof(struct dt2811_board),
};
module_comedi_driver(dt2811_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
-MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_DESCRIPTION("Comedi driver for Data Translation DT2811 series boards");
MODULE_LICENSE("GPL");
projects / karo-tx-linux.git / blobdiff