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path: root/drivers/staging/comedi/drivers/dt2811.c
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Diffstat (limited to 'drivers/staging/comedi/drivers/dt2811.c')
-rw-r--r--drivers/staging/comedi/drivers/dt2811.c645
1 files changed, 0 insertions, 645 deletions
diff --git a/drivers/staging/comedi/drivers/dt2811.c b/drivers/staging/comedi/drivers/dt2811.c
deleted file mode 100644
index 0eb5e6ba6916..000000000000
--- a/drivers/staging/comedi/drivers/dt2811.c
+++ /dev/null
@@ -1,645 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Comedi driver for Data Translation DT2811
- *
- * COMEDI - Linux Control and Measurement Device Interface
- * Copyright (C) David A. Schleef <ds@schleef.org>
- */
-
-/*
- * 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"
-
-/*
- * 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=interrupts 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
- */
-static const unsigned int dt2811_clk_dividers[] = {
- 1, 10, 2, 3, 4, 5, 6, 12
-};
-
-static const unsigned int dt2811_clk_multipliers[] = {
- 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
-};
-
-/*
- * 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 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 */
- }
-};
-
-/*
- * 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),
- UNI_RANGE(5)
- }
-};
-
-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",
- },
-};
-
-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;
-
- val = inb(dev->iobase + DT2811_ADDATA_LO_REG) |
- (inb(dev->iobase + DT2811_ADDATA_HI_REG) << 8);
-
- return val & s->maxdata;
-}
-
-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;
-
- if (!dev->attached)
- return IRQ_NONE;
-
- status = inb(dev->iobase + DT2811_ADCSR_REG);
-
- if (status & DT2811_ADCSR_ADERROR) {
- async->events |= COMEDI_CB_OVERFLOW;
-
- outb(status | DT2811_ADCSR_CLRERROR,
- dev->iobase + DT2811_ADCSR_REG);
- }
-
- if (status & DT2811_ADCSR_ADDONE) {
- unsigned short val;
-
- 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;
- 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,
- struct comedi_insn *insn,
- unsigned long context)
-{
- unsigned int status;
-
- status = inb(dev->iobase + DT2811_ADCSR_REG);
- if ((status & DT2811_ADCSR_ADBUSY) == 0)
- return 0;
- return -EBUSY;
-}
-
-static int dt2811_ai_insn_read(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- int ret;
- int i;
-
- /* We will already be in Mode 0 */
- for (i = 0; i < insn->n; i++) {
- /* 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] = dt2811_ai_read_sample(dev, s);
- }
-
- return insn->n;
-}
-
-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_DADATA_LO_REG(chan));
- outb((val >> 8) & 0xff,
- dev->iobase + DT2811_DADATA_HI_REG(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_DI_REG);
-
- 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_DO_REG);
-
- data[1] = s->state;
-
- return insn->n;
-}
-
-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)
-{
- const struct dt2811_board *board = dev->board_ptr;
- struct dt2811_private *devpriv;
- 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;
-
- 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;
-
- /* Analog Input subdevice */
- s = &dev->subdevices[0];
- 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];
- 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];
- 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];
- 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 struct comedi_driver dt2811_driver = {
- .driver_name = "dt2811",
- .module = THIS_MODULE,
- .attach = dt2811_attach,
- .detach = comedi_legacy_detach,
- .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 https://www.comedi.org");
-MODULE_DESCRIPTION("Comedi driver for Data Translation DT2811 series boards");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2024-06-13 13:02:32 +0000