--- /dev/null
+/*
+ comedi/drivers/dmm32at.c
+ Diamond Systems mm32at code for a Comedi driver
+
+ COMEDI - Linux Control and Measurement Device Interface
+ Copyright (C) 2000 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.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+/*
+Driver: dmm32at
+Description: Diamond Systems mm32at driver.
+Devices:
+Author: Perry J. Piplani <perry.j.piplani@nasa.gov>
+Updated: Fri Jun 4 09:13:24 CDT 2004
+Status: experimental
+
+This driver is for the Diamond Systems MM-32-AT board
+http://www.diamondsystems.com/products/diamondmm32at It is being used
+on serveral projects inside NASA, without problems so far. For analog
+input commands, TRIG_EXT is not yet supported at all..
+
+Configuration Options:
+ comedi_config /dev/comedi0 dmm32at baseaddr,irq
+*/
+
+/*
+ * The previous block comment is used to automatically generate
+ * documentation in Comedi and Comedilib. The fields:
+ *
+ * Driver: the name of the driver
+ * Description: a short phrase describing the driver. Don't list boards.
+ * Devices: a full list of the boards that attempt to be supported by
+ * the driver. Format is "(manufacturer) board name [comedi name]",
+ * where comedi_name is the name that is used to configure the board.
+ * See the comment near board_name: in the comedi_driver structure
+ * below. If (manufacturer) or [comedi name] is missing, the previous
+ * value is used.
+ * Author: you
+ * Updated: date when the _documentation_ was last updated. Use 'date -R'
+ * to get a value for this.
+ * Status: a one-word description of the status. Valid values are:
+ * works - driver works correctly on most boards supported, and
+ * passes comedi_test.
+ * unknown - unknown. Usually put there by ds.
+ * experimental - may not work in any particular release. Author
+ * probably wants assistance testing it.
+ * bitrotten - driver has not been update in a long time, probably
+ * doesn't work, and probably is missing support for significant
+ * Comedi interface features.
+ * untested - author probably wrote it "blind", and is believed to
+ * work, but no confirmation.
+ *
+ * These headers should be followed by a blank line, and any comments
+ * you wish to say about the driver. The comment area is the place
+ * to put any known bugs, limitations, unsupported features, supported
+ * command triggers, whether or not commands are supported on particular
+ * subdevices, etc.
+ *
+ * Somewhere in the comment should be information about configuration
+ * options that are used with comedi_config.
+ */
+
+#include "../comedidev.h"
+#include <linux/ioport.h>
+
+/* Board register addresses */
+
+#define DMM32AT_MEMSIZE 0x10
+
+#define DMM32AT_CONV 0x00
+#define DMM32AT_AILSB 0x00
+#define DMM32AT_AUXDOUT 0x01
+#define DMM32AT_AIMSB 0x01
+#define DMM32AT_AILOW 0x02
+#define DMM32AT_AIHIGH 0x03
+
+#define DMM32AT_DACLSB 0x04
+#define DMM32AT_DACSTAT 0x04
+#define DMM32AT_DACMSB 0x05
+
+#define DMM32AT_FIFOCNTRL 0x07
+#define DMM32AT_FIFOSTAT 0x07
+
+#define DMM32AT_CNTRL 0x08
+#define DMM32AT_AISTAT 0x08
+
+#define DMM32AT_INTCLOCK 0x09
+
+#define DMM32AT_CNTRDIO 0x0a
+
+#define DMM32AT_AICONF 0x0b
+#define DMM32AT_AIRBACK 0x0b
+
+#define DMM32AT_CLK1 0x0d
+#define DMM32AT_CLK2 0x0e
+#define DMM32AT_CLKCT 0x0f
+
+#define DMM32AT_DIOA 0x0c
+#define DMM32AT_DIOB 0x0d
+#define DMM32AT_DIOC 0x0e
+#define DMM32AT_DIOCONF 0x0f
+
+#define dmm_inb(cdev,reg) inb((cdev->iobase)+reg)
+#define dmm_outb(cdev,reg,valu) outb(valu,(cdev->iobase)+reg)
+
+/* Board register values. */
+
+/* DMM32AT_DACSTAT 0x04 */
+#define DMM32AT_DACBUSY 0x80
+
+/* DMM32AT_FIFOCNTRL 0x07 */
+#define DMM32AT_FIFORESET 0x02
+#define DMM32AT_SCANENABLE 0x04
+
+/* DMM32AT_CNTRL 0x08 */
+#define DMM32AT_RESET 0x20
+#define DMM32AT_INTRESET 0x08
+#define DMM32AT_CLKACC 0x00
+#define DMM32AT_DIOACC 0x01
+
+/* DMM32AT_AISTAT 0x08 */
+#define DMM32AT_STATUS 0x80
+
+/* DMM32AT_INTCLOCK 0x09 */
+#define DMM32AT_ADINT 0x80
+#define DMM32AT_CLKSEL 0x03
+
+/* DMM32AT_CNTRDIO 0x0a */
+#define DMM32AT_FREQ12 0x80
+
+/* DMM32AT_AICONF 0x0b */
+#define DMM32AT_RANGE_U10 0x0c
+#define DMM32AT_RANGE_U5 0x0d
+#define DMM32AT_RANGE_B10 0x08
+#define DMM32AT_RANGE_B5 0x00
+#define DMM32AT_SCINT_20 0x00
+#define DMM32AT_SCINT_15 0x10
+#define DMM32AT_SCINT_10 0x20
+#define DMM32AT_SCINT_5 0x30
+
+/* DMM32AT_CLKCT 0x0f */
+#define DMM32AT_CLKCT1 0x56 /* mode3 counter 1 - write low byte only */
+#define DMM32AT_CLKCT2 0xb6 /* mode3 counter 2 - write high and low byte */
+
+/* DMM32AT_DIOCONF 0x0f */
+#define DMM32AT_DIENABLE 0x80
+#define DMM32AT_DIRA 0x10
+#define DMM32AT_DIRB 0x02
+#define DMM32AT_DIRCL 0x01
+#define DMM32AT_DIRCH 0x08
+
+/* board AI ranges in comedi structure */
+static const comedi_lrange dmm32at_airanges = {
+ 4,
+ {
+ UNI_RANGE(10),
+ UNI_RANGE(5),
+ BIP_RANGE(10),
+ BIP_RANGE(5),
+ }
+};
+
+/* register values for above ranges */
+static const unsigned char dmm32at_rangebits[] = {
+ DMM32AT_RANGE_U10,
+ DMM32AT_RANGE_U5,
+ DMM32AT_RANGE_B10,
+ DMM32AT_RANGE_B5,
+};
+
+/* only one of these ranges is valid, as set by a jumper on the
+ * board. The application should only use the range set by the jumper
+ */
+static const comedi_lrange dmm32at_aoranges = {
+ 4,
+ {
+ UNI_RANGE(10),
+ UNI_RANGE(5),
+ BIP_RANGE(10),
+ BIP_RANGE(5),
+ }
+};
+
+/*
+ * Board descriptions for two imaginary boards. Describing the
+ * boards in this way is optional, and completely driver-dependent.
+ * Some drivers use arrays such as this, other do not.
+ */
+typedef struct dmm32at_board_struct {
+ const char *name;
+ int ai_chans;
+ int ai_bits;
+ const comedi_lrange *ai_ranges;
+ int ao_chans;
+ int ao_bits;
+ const comedi_lrange *ao_ranges;
+ int have_dio;
+ int dio_chans;
+} dmm32at_board;
+static const dmm32at_board dmm32at_boards[] = {
+ {
+ name: "dmm32at",
+ ai_chans:32,
+ ai_bits: 16,
+ ai_ranges:&dmm32at_airanges,
+ ao_chans:4,
+ ao_bits: 12,
+ ao_ranges:&dmm32at_aoranges,
+ have_dio:1,
+ dio_chans:24,
+ },
+};
+
+/*
+ * Useful for shorthand access to the particular board structure
+ */
+#define thisboard ((const dmm32at_board *)dev->board_ptr)
+
+/* this structure is for data unique to this hardware driver. If
+ * several hardware drivers keep similar information in this structure,
+ * feel free to suggest moving the variable to the comedi_device struct.
+ */
+typedef struct {
+
+ int data;
+ int ai_inuse;
+ unsigned int ai_scans_left;
+
+ /* Used for AO readback */
+ lsampl_t ao_readback[4];
+ unsigned char dio_config;
+
+} dmm32at_private;
+
+/*
+ * most drivers define the following macro to make it easy to
+ * access the private structure.
+ */
+#define devpriv ((dmm32at_private *)dev->private)
+
+/*
+ * The comedi_driver structure tells the Comedi core module
+ * which functions to call to configure/deconfigure (attach/detach)
+ * the board, and also about the kernel module that contains
+ * the device code.
+ */
+static int dmm32at_attach(comedi_device * dev, comedi_devconfig * it);
+static int dmm32at_detach(comedi_device * dev);
+static comedi_driver driver_dmm32at = {
+ driver_name:"dmm32at",
+ module:THIS_MODULE,
+ attach:dmm32at_attach,
+ detach:dmm32at_detach,
+/* It is not necessary to implement the following members if you are
+ * writing a driver for a ISA PnP or PCI card */
+/* Most drivers will support multiple types of boards by
+ * having an array of board structures. These were defined
+ * in dmm32at_boards[] above. Note that the element 'name'
+ * was first in the structure -- Comedi uses this fact to
+ * extract the name of the board without knowing any details
+ * about the structure except for its length.
+ * When a device is attached (by comedi_config), the name
+ * of the device is given to Comedi, and Comedi tries to
+ * match it by going through the list of board names. If
+ * there is a match, the address of the pointer is put
+ * into dev->board_ptr and driver->attach() is called.
+ *
+ * Note that these are not necessary if you can determine
+ * the type of board in software. ISA PnP, PCI, and PCMCIA
+ * devices are such boards.
+ */
+ board_name:&dmm32at_boards[0].name,
+ offset:sizeof(dmm32at_board),
+ num_names:sizeof(dmm32at_boards) / sizeof(dmm32at_board),
+};
+
+/* prototypes for driver functions below */
+static int dmm32at_ai_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int dmm32at_ao_winsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int dmm32at_ao_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int dmm32at_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int dmm32at_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int dmm32at_ai_cmdtest(comedi_device * dev, comedi_subdevice * s,
+ comedi_cmd * cmd);
+static int dmm32at_ai_cmd(comedi_device * dev, comedi_subdevice * s);
+static int dmm32at_ai_cancel(comedi_device * dev, comedi_subdevice * s);
+static int dmm32at_ns_to_timer(unsigned int *ns, int round);
+static irqreturn_t dmm32at_isr(int irq, void *d PT_REGS_ARG);
+void dmm32at_setaitimer(comedi_device * dev, unsigned int nansec);
+
+/*
+ * Attach is called by the Comedi core to configure the driver
+ * for a particular board. If you specified a board_name array
+ * in the driver structure, dev->board_ptr contains that
+ * address.
+ */
+static int dmm32at_attach(comedi_device * dev, comedi_devconfig * it)
+{
+ int ret;
+ comedi_subdevice *s;
+ unsigned char aihi, ailo, fifostat, aistat, intstat, airback;
+ unsigned long iobase;
+ unsigned int irq;
+
+ iobase = it->options[0];
+ irq = it->options[1];
+
+ printk("comedi%d: dmm32at: attaching\n", dev->minor);
+ printk("dmm32at: probing at address 0x%04lx, irq %u\n", iobase, irq);
+
+ /* register address space */
+ if (!request_region(iobase, DMM32AT_MEMSIZE, thisboard->name)) {
+ printk("I/O port conflict\n");
+ return -EIO;
+ }
+ dev->iobase = iobase;
+
+ /* the following just makes sure the board is there and gets
+ it to a known state */
+
+ /* reset the board */
+ dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_RESET);
+
+ /* allow a millisecond to reset */
+ udelay(1000);
+
+ /* zero scan and fifo control */
+ dmm_outb(dev, DMM32AT_FIFOCNTRL, 0x0);
+
+ /* zero interrupt and clock control */
+ dmm_outb(dev, DMM32AT_INTCLOCK, 0x0);
+
+ /* write a test channel range, the high 3 bits should drop */
+ dmm_outb(dev, DMM32AT_AILOW, 0x80);
+ dmm_outb(dev, DMM32AT_AIHIGH, 0xff);
+
+ /* set the range at 10v unipolar */
+ dmm_outb(dev, DMM32AT_AICONF, DMM32AT_RANGE_U10);
+
+ /* should take 10 us to settle, here's a hundred */
+ udelay(100);
+
+ /* read back the values */
+ ailo = dmm_inb(dev, DMM32AT_AILOW);
+ aihi = dmm_inb(dev, DMM32AT_AIHIGH);
+ fifostat = dmm_inb(dev, DMM32AT_FIFOSTAT);
+ aistat = dmm_inb(dev, DMM32AT_AISTAT);
+ intstat = dmm_inb(dev, DMM32AT_INTCLOCK);
+ airback = dmm_inb(dev, DMM32AT_AIRBACK);
+
+ printk("dmm32at: lo=0x%02x hi=0x%02x fifostat=0x%02x\n",
+ ailo, aihi, fifostat);
+ printk("dmm32at: aistat=0x%02x intstat=0x%02x airback=0x%02x\n",
+ aistat, intstat, airback);
+
+ if ((ailo != 0x00) || (aihi != 0x1f) || (fifostat != 0x80) ||
+ (aistat != 0x60 || (intstat != 0x00) || airback != 0x0c)) {
+ printk("dmmat32: board detection failed\n");
+ return -EIO;
+ }
+
+ /* board is there, register interrupt */
+ if (irq) {
+ ret = comedi_request_irq(irq, dmm32at_isr, 0, thisboard->name,
+ dev);
+ if (ret < 0) {
+ printk("irq conflict\n");
+ return ret;
+ }
+ dev->irq = irq;
+ }
+
+/*
+ * If you can probe the device to determine what device in a series
+ * it is, this is the place to do it. Otherwise, dev->board_ptr
+ * should already be initialized.
+ */
+ //dev->board_ptr = dmm32at_probe(dev);
+
+/*
+ * Initialize dev->board_name. Note that we can use the "thisboard"
+ * macro now, since we just initialized it in the last line.
+ */
+ dev->board_name = thisboard->name;
+
+/*
+ * Allocate the private structure area. alloc_private() is a
+ * convenient macro defined in comedidev.h.
+ */
+ if (alloc_private(dev, sizeof(dmm32at_private)) < 0)
+ return -ENOMEM;
+
+/*
+ * Allocate the subdevice structures. alloc_subdevice() is a
+ * convenient macro defined in comedidev.h.
+ */
+ if (alloc_subdevices(dev, 3) < 0)
+ return -ENOMEM;
+
+ s = dev->subdevices + 0;
+ dev->read_subdev = s;
+ /* analog input subdevice */
+ s->type = COMEDI_SUBD_AI;
+ /* we support single-ended (ground) and differential */
+ s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF | SDF_CMD_READ;
+ s->n_chan = thisboard->ai_chans;
+ s->maxdata = (1 << thisboard->ai_bits) - 1;
+ s->range_table = thisboard->ai_ranges;
+ s->len_chanlist = 32; /* This is the maximum chanlist length that
+ the board can handle */
+ s->insn_read = dmm32at_ai_rinsn;
+ s->do_cmd = dmm32at_ai_cmd;
+ s->do_cmdtest = dmm32at_ai_cmdtest;
+ s->cancel = dmm32at_ai_cancel;
+
+ s = dev->subdevices + 1;
+ /* analog output subdevice */
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = thisboard->ao_chans;
+ s->maxdata = (1 << thisboard->ao_bits) - 1;
+ s->range_table = thisboard->ao_ranges;
+ s->insn_write = dmm32at_ao_winsn;
+ s->insn_read = dmm32at_ao_rinsn;
+
+ s = dev->subdevices + 2;
+ /* digital i/o subdevice */
+ if (thisboard->have_dio) {
+
+ /* get access to the DIO regs */
+ dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_DIOACC);
+ /* set the DIO's to the defualt input setting */
+ devpriv->dio_config = DMM32AT_DIRA | DMM32AT_DIRB |
+ DMM32AT_DIRCL | DMM32AT_DIRCH | DMM32AT_DIENABLE;
+ dmm_outb(dev, DMM32AT_DIOCONF, devpriv->dio_config);
+
+ /* set up the subdevice */
+ s->type = COMEDI_SUBD_DIO;
+ s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+ s->n_chan = thisboard->dio_chans;
+ s->maxdata = 1;
+ s->state = 0;
+ s->range_table = &range_digital;
+ s->insn_bits = dmm32at_dio_insn_bits;
+ s->insn_config = dmm32at_dio_insn_config;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ /* success */
+ printk("comedi%d: dmm32at: attached\n", dev->minor);
+
+ return 1;
+
+}
+
+/*
+ * _detach is called to deconfigure a device. It should deallocate
+ * resources.
+ * This function is also called when _attach() fails, so it should be
+ * careful not to release resources that were not necessarily
+ * allocated by _attach(). dev->private and dev->subdevices are
+ * deallocated automatically by the core.
+ */
+static int dmm32at_detach(comedi_device * dev)
+{
+ printk("comedi%d: dmm32at: remove\n", dev->minor);
+ if (dev->irq)
+ comedi_free_irq(dev->irq, dev);
+ if (dev->iobase)
+ release_region(dev->iobase, DMM32AT_MEMSIZE);
+
+ return 0;
+}
+
+/*
+ * "instructions" read/write data in "one-shot" or "software-triggered"
+ * mode.
+ */
+
+static int dmm32at_ai_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int n, i;
+ unsigned int d;
+ unsigned char status;
+ unsigned short msb, lsb;
+ unsigned char chan;
+ int range;
+
+ /* get the channel and range number */
+
+ chan = CR_CHAN(insn->chanspec) & (s->n_chan - 1);
+ range = CR_RANGE(insn->chanspec);
+
+ //printk("channel=0x%02x, range=%d\n",chan,range);
+
+ /* zero scan and fifo control and reset fifo */
+ dmm_outb(dev, DMM32AT_FIFOCNTRL, DMM32AT_FIFORESET);
+
+ /* write the ai channel range regs */
+ dmm_outb(dev, DMM32AT_AILOW, chan);
+ dmm_outb(dev, DMM32AT_AIHIGH, chan);
+ /* set the range bits */
+ dmm_outb(dev, DMM32AT_AICONF, dmm32at_rangebits[range]);
+
+ /* wait for circuit to settle */
+ for (i = 0; i < 40000; i++) {
+ status = dmm_inb(dev, DMM32AT_AIRBACK);
+ if ((status & DMM32AT_STATUS) == 0)
+ break;
+ }
+ if (i == 40000) {
+ printk("timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ /* convert n samples */
+ for (n = 0; n < insn->n; n++) {
+ /* trigger conversion */
+ dmm_outb(dev, DMM32AT_CONV, 0xff);
+ /* wait for conversion to end */
+ for (i = 0; i < 40000; i++) {
+ status = dmm_inb(dev, DMM32AT_AISTAT);
+ if ((status & DMM32AT_STATUS) == 0)
+ break;
+ }
+ if (i == 40000) {
+ printk("timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ /* read data */
+ lsb = dmm_inb(dev, DMM32AT_AILSB);
+ msb = dmm_inb(dev, DMM32AT_AIMSB);
+
+ /* invert sign bit to make range unsigned, this is an
+ idiosyncracy of the diamond board, it return
+ conversions as a signed value, i.e. -32768 to
+ 32767, flipping the bit and interpreting it as
+ signed gives you a range of 0 to 65535 which is
+ used by comedi */
+ d = ((msb ^ 0x0080) << 8) + lsb;
+
+ data[n] = d;
+ }
+
+ /* return the number of samples read/written */
+ return n;
+}
+
+static int dmm32at_ai_cmdtest(comedi_device * dev, comedi_subdevice * s,
+ comedi_cmd * cmd)
+{
+ int err = 0;
+ int tmp;
+ int start_chan, gain, i;
+
+ //printk("dmmat32 in command test\n");
+
+ /* cmdtest tests a particular command to see if it is valid.
+ * Using the cmdtest ioctl, a user can create a valid cmd
+ * and then have it executes by the cmd ioctl.
+ *
+ * cmdtest returns 1,2,3,4 or 0, depending on which tests
+ * the command passes. */
+
+ /* step 1: make sure trigger sources are trivially valid */
+
+ tmp = cmd->start_src;
+ cmd->start_src &= TRIG_NOW;
+ if (!cmd->start_src || tmp != cmd->start_src)
+ err++;
+
+ tmp = cmd->scan_begin_src;
+ cmd->scan_begin_src &= TRIG_TIMER /*| TRIG_EXT */ ;
+ if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
+ err++;
+
+ tmp = cmd->convert_src;
+ cmd->convert_src &= TRIG_TIMER /*| TRIG_EXT */ ;
+ if (!cmd->convert_src || tmp != cmd->convert_src)
+ err++;
+
+ tmp = cmd->scan_end_src;
+ cmd->scan_end_src &= TRIG_COUNT;
+ if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
+ err++;
+
+ tmp = cmd->stop_src;
+ cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
+ if (!cmd->stop_src || tmp != cmd->stop_src)
+ err++;
+
+ if (err)
+ return 1;
+
+ /* step 2: make sure trigger sources are unique and mutually compatible */
+
+ /* note that mutual compatiblity is not an issue here */
+ if (cmd->scan_begin_src != TRIG_TIMER &&
+ cmd->scan_begin_src != TRIG_EXT)
+ err++;
+ if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT)
+ err++;
+ if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
+ err++;
+
+ if (err)
+ return 2;
+
+ /* step 3: make sure arguments are trivially compatible */
+
+ if (cmd->start_arg != 0) {
+ cmd->start_arg = 0;
+ err++;
+ }
+#define MAX_SCAN_SPEED 1000000 /* in nanoseconds */
+#define MIN_SCAN_SPEED 1000000000 /* in nanoseconds */
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ if (cmd->scan_begin_arg < MAX_SCAN_SPEED) {
+ cmd->scan_begin_arg = MAX_SCAN_SPEED;
+ err++;
+ }
+ if (cmd->scan_begin_arg > MIN_SCAN_SPEED) {
+ cmd->scan_begin_arg = MIN_SCAN_SPEED;
+ err++;
+ }
+ } else {
+ /* external trigger */
+ /* should be level/edge, hi/lo specification here */
+ /* should specify multiple external triggers */
+ if (cmd->scan_begin_arg > 9) {
+ cmd->scan_begin_arg = 9;
+ err++;
+ }
+ }
+ if (cmd->convert_src == TRIG_TIMER) {
+ if (cmd->convert_arg >= 17500)
+ cmd->convert_arg = 20000;
+ else if (cmd->convert_arg >= 12500)
+ cmd->convert_arg = 15000;
+ else if (cmd->convert_arg >= 7500)
+ cmd->convert_arg = 10000;
+ else
+ cmd->convert_arg = 5000;
+
+ } else {
+ /* external trigger */
+ /* see above */
+ if (cmd->convert_arg > 9) {
+ cmd->convert_arg = 9;
+ err++;
+ }
+ }
+
+ if (cmd->scan_end_arg != cmd->chanlist_len) {
+ cmd->scan_end_arg = cmd->chanlist_len;
+ err++;
+ }
+ if (cmd->stop_src == TRIG_COUNT) {
+ if (cmd->stop_arg > 0xfffffff0) {
+ cmd->stop_arg = 0xfffffff0;
+ err++;
+ }
+ if (cmd->stop_arg == 0) {
+ cmd->stop_arg = 1;
+ err++;
+ }
+ } else {
+ /* TRIG_NONE */
+ if (cmd->stop_arg != 0) {
+ cmd->stop_arg = 0;
+ err++;
+ }
+ }
+
+ if (err)
+ return 3;
+
+ /* step 4: fix up any arguments */
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ tmp = cmd->scan_begin_arg;
+ dmm32at_ns_to_timer(&cmd->scan_begin_arg,
+ cmd->flags & TRIG_ROUND_MASK);
+ if (tmp != cmd->scan_begin_arg)
+ err++;
+ }
+ if (cmd->convert_src == TRIG_TIMER) {
+ tmp = cmd->convert_arg;
+ dmm32at_ns_to_timer(&cmd->convert_arg,
+ cmd->flags & TRIG_ROUND_MASK);
+ if (tmp != cmd->convert_arg)
+ err++;
+ if (cmd->scan_begin_src == TRIG_TIMER &&
+ cmd->scan_begin_arg <
+ cmd->convert_arg * cmd->scan_end_arg) {
+ cmd->scan_begin_arg =
+ cmd->convert_arg * cmd->scan_end_arg;
+ err++;
+ }
+ }
+
+ if (err)
+ return 4;
+
+ /* step 5 check the channel list, the channel list for this
+ board must be consecutive and gains must be the same */
+
+ if (cmd->chanlist) {
+ gain = CR_RANGE(cmd->chanlist[0]);
+ start_chan = CR_CHAN(cmd->chanlist[0]);
+ for (i = 1; i < cmd->chanlist_len; i++) {
+ if (CR_CHAN(cmd->chanlist[i]) !=
+ (start_chan + i) % s->n_chan) {
+ comedi_error(dev,
+ "entries in chanlist must be consecutive channels, counting upwards\n");
+ err++;
+ }
+ if (CR_RANGE(cmd->chanlist[i]) != gain) {
+ comedi_error(dev,
+ "entries in chanlist must all have the same gain\n");
+ err++;
+ }
+ }
+ }
+
+ if (err)
+ return 5;
+
+ return 0;
+}
+
+static int dmm32at_ai_cmd(comedi_device * dev, comedi_subdevice * s)
+{
+ comedi_cmd *cmd = &s->async->cmd;
+ int i, range;
+ unsigned char chanlo, chanhi, status;
+
+ if (!cmd->chanlist)
+ return -EINVAL;
+
+ /* get the channel list and range */
+ chanlo = CR_CHAN(cmd->chanlist[0]) & (s->n_chan - 1);
+ chanhi = chanlo + cmd->chanlist_len - 1;
+ if (chanhi >= s->n_chan)
+ return -EINVAL;
+ range = CR_RANGE(cmd->chanlist[0]);
+
+ /* reset fifo */
+ dmm_outb(dev, DMM32AT_FIFOCNTRL, DMM32AT_FIFORESET);
+
+ /* set scan enable */
+ dmm_outb(dev, DMM32AT_FIFOCNTRL, DMM32AT_SCANENABLE);
+
+ /* write the ai channel range regs */
+ dmm_outb(dev, DMM32AT_AILOW, chanlo);
+ dmm_outb(dev, DMM32AT_AIHIGH, chanhi);
+
+ /* set the range bits */
+ dmm_outb(dev, DMM32AT_AICONF, dmm32at_rangebits[range]);
+
+ /* reset the interrupt just in case */
+ dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_INTRESET);
+
+ if (cmd->stop_src == TRIG_COUNT)
+ devpriv->ai_scans_left = cmd->stop_arg;
+ else { /* TRIG_NONE */
+ devpriv->ai_scans_left = 0xffffffff; /* indicates TRIG_NONE to isr */
+ }
+
+ /* wait for circuit to settle */
+ for (i = 0; i < 40000; i++) {
+ status = dmm_inb(dev, DMM32AT_AIRBACK);
+ if ((status & DMM32AT_STATUS) == 0)
+ break;
+ }
+ if (i == 40000) {
+ printk("timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ if (devpriv->ai_scans_left > 1) {
+ /* start the clock and enable the interrupts */
+ dmm32at_setaitimer(dev, cmd->scan_begin_arg);
+ } else {
+ /* start the interrups and initiate a single scan */
+ dmm_outb(dev, DMM32AT_INTCLOCK, DMM32AT_ADINT);
+ dmm_outb(dev, DMM32AT_CONV, 0xff);
+ }
+
+/* printk("dmmat32 in command\n"); */
+
+/* for(i=0;i<cmd->chanlist_len;i++) */
+/* comedi_buf_put(s->async,i*100); */
+
+/* s->async->events |= COMEDI_CB_EOA; */
+/* comedi_event(dev, s); */
+
+ return 0;
+
+}
+
+static int dmm32at_ai_cancel(comedi_device * dev, comedi_subdevice * s)
+{
+ devpriv->ai_scans_left = 1;
+ return 0;
+}
+
+static irqreturn_t dmm32at_isr(int irq, void *d PT_REGS_ARG)
+{
+ unsigned char intstat;
+ unsigned int samp;
+ unsigned short msb, lsb;
+ int i;
+ comedi_device *dev = d;
+
+ if (!dev->attached) {
+ comedi_error(dev, "spurious interrupt");
+ return IRQ_HANDLED;
+ }
+
+ intstat = dmm_inb(dev, DMM32AT_INTCLOCK);
+
+ if (intstat & DMM32AT_ADINT) {
+ comedi_subdevice *s = dev->read_subdev;
+ comedi_cmd *cmd = &s->async->cmd;
+
+ for (i = 0; i < cmd->chanlist_len; i++) {
+ /* read data */
+ lsb = dmm_inb(dev, DMM32AT_AILSB);
+ msb = dmm_inb(dev, DMM32AT_AIMSB);
+
+ /* invert sign bit to make range unsigned */
+ samp = ((msb ^ 0x0080) << 8) + lsb;
+ comedi_buf_put(s->async, samp);
+ }
+
+ if (devpriv->ai_scans_left != 0xffffffff) { /* TRIG_COUNT */
+ devpriv->ai_scans_left--;
+ if (devpriv->ai_scans_left == 0) {
+ /* disable further interrupts and clocks */
+ dmm_outb(dev, DMM32AT_INTCLOCK, 0x0);
+ /* set the buffer to be flushed with an EOF */
+ s->async->events |= COMEDI_CB_EOA;
+ }
+
+ }
+ /* flush the buffer */
+ comedi_event(dev, s);
+ }
+
+ /* reset the interrupt */
+ dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_INTRESET);
+ return IRQ_HANDLED;
+}
+
+/* This function doesn't require a particular form, this is just
+ * what happens to be used in some of the drivers. It should
+ * convert ns nanoseconds to a counter value suitable for programming
+ * the device. Also, it should adjust ns so that it cooresponds to
+ * the actual time that the device will use. */
+static int dmm32at_ns_to_timer(unsigned int *ns, int round)
+{
+ /* trivial timer */
+ /* if your timing is done through two cascaded timers, the
+ * i8253_cascade_ns_to_timer() function in 8253.h can be
+ * very helpful. There are also i8254_load() and i8254_mm_load()
+ * which can be used to load values into the ubiquitous 8254 counters
+ */
+
+ return *ns;
+}
+
+static int dmm32at_ao_winsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int i;
+ int chan = CR_CHAN(insn->chanspec);
+ unsigned char hi, lo, status;
+
+ /* Writing a list of values to an AO channel is probably not
+ * very useful, but that's how the interface is defined. */
+ for (i = 0; i < insn->n; i++) {
+
+ devpriv->ao_readback[chan] = data[i];
+
+ /* get the low byte */
+ lo = data[i] & 0x00ff;
+ /* high byte also contains channel number */
+ hi = (data[i] >> 8) + chan * (1 << 6);
+ //printk("writing 0x%02x 0x%02x\n",hi,lo);
+ /* write the low and high values to the board */
+ dmm_outb(dev, DMM32AT_DACLSB, lo);
+ dmm_outb(dev, DMM32AT_DACMSB, hi);
+
+ /* wait for circuit to settle */
+ for (i = 0; i < 40000; i++) {
+ status = dmm_inb(dev, DMM32AT_DACSTAT);
+ if ((status & DMM32AT_DACBUSY) == 0)
+ break;
+ }
+ if (i == 40000) {
+ printk("timeout\n");
+ return -ETIMEDOUT;
+ }
+ /* dummy read to update trigger the output */
+ status = dmm_inb(dev, DMM32AT_DACMSB);
+
+ }
+
+ /* return the number of samples read/written */
+ return i;
+}
+
+/* AO subdevices should have a read insn as well as a write insn.
+ * Usually this means copying a value stored in devpriv. */
+static int dmm32at_ao_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int i;
+ int chan = CR_CHAN(insn->chanspec);
+
+ for (i = 0; i < insn->n; i++)
+ data[i] = devpriv->ao_readback[chan];
+
+ return i;
+}
+
+/* DIO devices are slightly special. Although it is possible to
+ * implement the insn_read/insn_write interface, it is much more
+ * useful to applications if you implement the insn_bits interface.
+ * This allows packed reading/writing of the DIO channels. The
+ * comedi core can convert between insn_bits and insn_read/write */
+static int dmm32at_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ unsigned char diobits;
+
+ if (insn->n != 2)
+ return -EINVAL;
+
+ /* The insn data is a mask in data[0] and the new data
+ * in data[1], each channel cooresponding to a bit. */
+ if (data[0]) {
+ s->state &= ~data[0];
+ s->state |= data[0] & data[1];
+ /* Write out the new digital output lines */
+ //outw(s->state,dev->iobase + DMM32AT_DIO);
+ }
+
+ /* get access to the DIO regs */
+ dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_DIOACC);
+
+ /* if either part of dio is set for output */
+ if (((devpriv->dio_config & DMM32AT_DIRCL) == 0) ||
+ ((devpriv->dio_config & DMM32AT_DIRCH) == 0)) {
+ diobits = (s->state & 0x00ff0000) >> 16;
+ dmm_outb(dev, DMM32AT_DIOC, diobits);
+ }
+ if ((devpriv->dio_config & DMM32AT_DIRB) == 0) {
+ diobits = (s->state & 0x0000ff00) >> 8;
+ dmm_outb(dev, DMM32AT_DIOB, diobits);
+ }
+ if ((devpriv->dio_config & DMM32AT_DIRA) == 0) {
+ diobits = (s->state & 0x000000ff);
+ dmm_outb(dev, DMM32AT_DIOA, diobits);
+ }
+
+ /* now read the state back in */
+ s->state = dmm_inb(dev, DMM32AT_DIOC);
+ s->state <<= 8;
+ s->state |= dmm_inb(dev, DMM32AT_DIOB);
+ s->state <<= 8;
+ s->state |= dmm_inb(dev, DMM32AT_DIOA);
+ data[1] = s->state;
+
+ /* on return, data[1] contains the value of the digital
+ * input and output lines. */
+ //data[1]=inw(dev->iobase + DMM32AT_DIO);
+ /* or we could just return the software copy of the output values if
+ * it was a purely digital output subdevice */
+ //data[1]=s->state;
+
+ return 2;
+}
+
+static int dmm32at_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ unsigned char chanbit;
+ int chan = CR_CHAN(insn->chanspec);
+
+ if (insn->n != 1)
+ return -EINVAL;
+
+ if (chan < 8)
+ chanbit = DMM32AT_DIRA;
+ else if (chan < 16)
+ chanbit = DMM32AT_DIRB;
+ else if (chan < 20)
+ chanbit = DMM32AT_DIRCL;
+ else
+ chanbit = DMM32AT_DIRCH;
+
+ /* The input or output configuration of each digital line is
+ * configured by a special insn_config instruction. chanspec
+ * contains the channel to be changed, and data[0] contains the
+ * value COMEDI_INPUT or COMEDI_OUTPUT. */
+
+ /* if output clear the bit, otherwise set it */
+ if (data[0] == COMEDI_OUTPUT) {
+ devpriv->dio_config &= ~chanbit;
+ } else {
+ devpriv->dio_config |= chanbit;
+ }
+ /* get access to the DIO regs */
+ dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_DIOACC);
+ /* set the DIO's to the new configuration setting */
+ dmm_outb(dev, DMM32AT_DIOCONF, devpriv->dio_config);
+
+ return 1;
+}
+
+void dmm32at_setaitimer(comedi_device * dev, unsigned int nansec)
+{
+ unsigned char lo1, lo2, hi2;
+ unsigned short both2;
+
+ /* based on 10mhz clock */
+ lo1 = 200;
+ both2 = nansec / 20000;
+ hi2 = (both2 & 0xff00) >> 8;
+ lo2 = both2 & 0x00ff;
+
+ /* set the counter frequency to 10mhz */
+ dmm_outb(dev, DMM32AT_CNTRDIO, 0);
+
+ /* get access to the clock regs */
+ dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_CLKACC);
+
+ /* write the counter 1 control word and low byte to counter */
+ dmm_outb(dev, DMM32AT_CLKCT, DMM32AT_CLKCT1);
+ dmm_outb(dev, DMM32AT_CLK1, lo1);
+
+ /* write the counter 2 control word and low byte then to counter */
+ dmm_outb(dev, DMM32AT_CLKCT, DMM32AT_CLKCT2);
+ dmm_outb(dev, DMM32AT_CLK2, lo2);
+ dmm_outb(dev, DMM32AT_CLK2, hi2);
+
+ /* enable the ai conversion interrupt and the clock to start scans */
+ dmm_outb(dev, DMM32AT_INTCLOCK, DMM32AT_ADINT | DMM32AT_CLKSEL);
+
+}
+
+/*
+ * A convenient macro that defines init_module() and cleanup_module(),
+ * as necessary.
+ */
+COMEDI_INITCLEANUP(driver_dmm32at);
projects / firefly-linux-kernel-4.4.55.git / commitdiff