--- /dev/null
+/*
+ comedi/drivers/s526.c
+ Sensoray s526 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: s526
+Description: Sensoray 526 driver
+Devices: [Sensoray] 526 (s526)
+Author: Richie
+ Everett Wang <everett.wang@everteq.com>
+Updated: Thu, 14 Sep. 2006
+Status: experimental
+
+Encoder works
+Analog input works
+Analog output works
+PWM output works
+Commands are not supported yet.
+
+Configuration Options:
+
+comedi_config /dev/comedi0 s526 0x2C0,0x3
+
+*/
+
+#include "../comedidev.h"
+#include <linux/ioport.h>
+
+#define S526_SIZE 64
+
+#define S526_START_AI_CONV 0
+#define S526_AI_READ 0
+
+/* Ports */
+#define S526_IOSIZE 0x40
+#define S526_NUM_PORTS 27
+
+/* registers */
+#define REG_TCR 0x00
+#define REG_WDC 0x02
+#define REG_DAC 0x04
+#define REG_ADC 0x06
+#define REG_ADD 0x08
+#define REG_DIO 0x0A
+#define REG_IER 0x0C
+#define REG_ISR 0x0E
+#define REG_MSC 0x10
+#define REG_C0L 0x12
+#define REG_C0H 0x14
+#define REG_C0M 0x16
+#define REG_C0C 0x18
+#define REG_C1L 0x1A
+#define REG_C1H 0x1C
+#define REG_C1M 0x1E
+#define REG_C1C 0x20
+#define REG_C2L 0x22
+#define REG_C2H 0x24
+#define REG_C2M 0x26
+#define REG_C2C 0x28
+#define REG_C3L 0x2A
+#define REG_C3H 0x2C
+#define REG_C3M 0x2E
+#define REG_C3C 0x30
+#define REG_EED 0x32
+#define REG_EEC 0x34
+
+static const int s526_ports[] = {
+ REG_TCR,
+ REG_WDC,
+ REG_DAC,
+ REG_ADC,
+ REG_ADD,
+ REG_DIO,
+ REG_IER,
+ REG_ISR,
+ REG_MSC,
+ REG_C0L,
+ REG_C0H,
+ REG_C0M,
+ REG_C0C,
+ REG_C1L,
+ REG_C1H,
+ REG_C1M,
+ REG_C1C,
+ REG_C2L,
+ REG_C2H,
+ REG_C2M,
+ REG_C2C,
+ REG_C3L,
+ REG_C3H,
+ REG_C3M,
+ REG_C3C,
+ REG_EED,
+ REG_EEC
+};
+
+typedef struct {
+ unsigned short coutSource:1;
+ unsigned short coutPolarity:1;
+ unsigned short autoLoadResetRcap:3;
+ unsigned short hwCtEnableSource:2;
+ unsigned short ctEnableCtrl:2;
+ unsigned short clockSource:2;
+ unsigned short countDir:1;
+ unsigned short countDirCtrl:1;
+ unsigned short outputRegLatchCtrl:1;
+ unsigned short preloadRegSel:1;
+ unsigned short reserved:1;
+} counter_mode_register_t;
+
+union {
+ counter_mode_register_t reg;
+ unsigned short value;
+} cmReg;
+
+#define MAX_GPCT_CONFIG_DATA 6
+
+/* Different Application Classes for GPCT Subdevices */
+/* The list is not exhaustive and needs discussion! */
+typedef enum {
+ CountingAndTimeMeasurement,
+ SinglePulseGeneration,
+ PulseTrainGeneration,
+ PositionMeasurement,
+ Miscellaneous
+} S526_GPCT_APP_CLASS;
+
+/* Config struct for different GPCT subdevice Application Classes and
+ their options
+*/
+typedef struct s526GPCTConfig {
+ S526_GPCT_APP_CLASS app;
+ int data[MAX_GPCT_CONFIG_DATA];
+} s526_gpct_config_t;
+
+/*
+ * 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 s526_board_struct {
+ const char *name;
+ int gpct_chans;
+ int gpct_bits;
+ int ad_chans;
+ int ad_bits;
+ int da_chans;
+ int da_bits;
+ int have_dio;
+} s526_board;
+
+static const s526_board s526_boards[] = {
+ {
+ name: "s526",
+ gpct_chans:4,
+ gpct_bits:24,
+ ad_chans:8,
+ ad_bits: 16,
+ da_chans:4,
+ da_bits: 16,
+ have_dio:1,
+ }
+};
+
+#define ADDR_REG(reg) (dev->iobase + (reg))
+#define ADDR_CHAN_REG(reg, chan) (dev->iobase + (reg) + (chan) * 8)
+
+/*
+ * Useful for shorthand access to the particular board structure
+ */
+#define thisboard ((const s526_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;
+
+ /* would be useful for a PCI device */
+ struct pci_dev *pci_dev;
+
+ /* Used for AO readback */
+ lsampl_t ao_readback[2];
+
+ s526_gpct_config_t s526_gpct_config[4];
+ unsigned short s526_ai_config;
+} s526_private;
+/*
+ * most drivers define the following macro to make it easy to
+ * access the private structure.
+ */
+#define devpriv ((s526_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 s526_attach(comedi_device * dev, comedi_devconfig * it);
+static int s526_detach(comedi_device * dev);
+static comedi_driver driver_s526 = {
+ driver_name:"s526",
+ module:THIS_MODULE,
+ attach:s526_attach,
+ detach:s526_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 s526_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:&s526_boards[0].name,
+ offset:sizeof(s526_board),
+ num_names:sizeof(s526_boards) / sizeof(s526_board),
+};
+
+static int s526_gpct_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int s526_gpct_insn_config(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int s526_gpct_winsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int s526_ai_insn_config(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int s526_ai_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int s526_ao_winsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int s526_ao_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int s526_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int s526_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+
+/*
+ * 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 s526_attach(comedi_device * dev, comedi_devconfig * it)
+{
+ comedi_subdevice *s;
+ int iobase;
+ int i, n;
+// sampl_t value;
+// int subdev_channel = 0;
+
+ printk("comedi%d: s526: ", dev->minor);
+
+ iobase = it->options[0];
+ if (!iobase || !request_region(iobase, S526_IOSIZE, thisboard->name)) {
+ comedi_error(dev, "I/O port conflict");
+ return -EIO;
+ }
+ dev->iobase = iobase;
+
+ printk("iobase=0x%lx\n", dev->iobase);
+
+ /*** make it a little quieter, exw, 8/29/06
+ for (i = 0; i < S526_NUM_PORTS; i++) {
+ printk("0x%02x: 0x%04x\n", ADDR_REG(s526_ports[i]), inw(ADDR_REG(s526_ports[i])));
+ }
+ ***/
+
+/*
+ * Initialize dev->board_name. Note that we can use the "thisboard"
+ * macro now, since we just initialized it in the last line.
+ */
+ dev->board_ptr = &s526_boards[0];
+
+ 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(s526_private)) < 0)
+ return -ENOMEM;
+
+/*
+ * Allocate the subdevice structures. alloc_subdevice() is a
+ * convenient macro defined in comedidev.h.
+ */
+ dev->n_subdevices = 4;
+ if (alloc_subdevices(dev, dev->n_subdevices) < 0)
+ return -ENOMEM;
+
+ s = dev->subdevices + 0;
+ /* GENERAL-PURPOSE COUNTER/TIME (GPCT) */
+ s->type = COMEDI_SUBD_COUNTER;
+ s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_LSAMPL;
+ /* KG: What does SDF_LSAMPL (see multiq3.c) mean? */
+ s->n_chan = thisboard->gpct_chans;
+ s->maxdata = 0x00ffffff; /* 24 bit counter */
+ s->insn_read = s526_gpct_rinsn;
+ s->insn_config = s526_gpct_insn_config;
+ s->insn_write = s526_gpct_winsn;
+
+ /* Command are not implemented yet, however they are necessary to
+ allocate the necessary memory for the comedi_async struct (used
+ to trigger the GPCT in case of pulsegenerator function */
+ //s->do_cmd = s526_gpct_cmd;
+ //s->do_cmdtest = s526_gpct_cmdtest;
+ //s->cancel = s526_gpct_cancel;
+
+ s = dev->subdevices + 1;
+ //dev->read_subdev=s;
+ /* analog input subdevice */
+ s->type = COMEDI_SUBD_AI;
+ /* we support differential */
+ s->subdev_flags = SDF_READABLE | SDF_DIFF;
+ /* channels 0 to 7 are the regular differential inputs */
+ /* channel 8 is "reference 0" (+10V), channel 9 is "reference 1" (0V) */
+ s->n_chan = 10;
+ s->maxdata = 0xffff;
+ s->range_table = &range_bipolar10;
+ s->len_chanlist = 16; /* This is the maximum chanlist length that
+ the board can handle */
+ s->insn_read = s526_ai_rinsn;
+ s->insn_config = s526_ai_insn_config;
+
+ s = dev->subdevices + 2;
+ /* analog output subdevice */
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 4;
+ s->maxdata = 0xffff;
+ s->range_table = &range_bipolar10;
+ s->insn_write = s526_ao_winsn;
+ s->insn_read = s526_ao_rinsn;
+
+ s = dev->subdevices + 3;
+ /* digital i/o subdevice */
+ if (thisboard->have_dio) {
+ s->type = COMEDI_SUBD_DIO;
+ s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+ s->n_chan = 2;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = s526_dio_insn_bits;
+ s->insn_config = s526_dio_insn_config;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ printk("attached\n");
+
+ return 1;
+
+#if 0
+ // Example of Counter Application
+ //One-shot (software trigger)
+ cmReg.reg.coutSource = 0; // out RCAP
+ cmReg.reg.coutPolarity = 1; // Polarity inverted
+ cmReg.reg.autoLoadResetRcap = 1; // Auto load 0:disabled, 1:enabled
+ cmReg.reg.hwCtEnableSource = 3; // NOT RCAP
+ cmReg.reg.ctEnableCtrl = 2; // Hardware
+ cmReg.reg.clockSource = 2; // Internal
+ cmReg.reg.countDir = 1; // Down
+ cmReg.reg.countDirCtrl = 1; // Software
+ cmReg.reg.outputRegLatchCtrl = 0; // latch on read
+ cmReg.reg.preloadRegSel = 0; // PR0
+ cmReg.reg.reserved = 0;
+
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
+
+ outw(0x0001, ADDR_CHAN_REG(REG_C0H, subdev_channel));
+ outw(0x3C68, ADDR_CHAN_REG(REG_C0L, subdev_channel));
+
+ outw(0x8000, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Reset the counter
+ outw(0x4000, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Load the counter from PR0
+
+ outw(0x0008, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Reset RCAP (fires one-shot)
+
+#else
+
+ // Set Counter Mode Register
+ cmReg.reg.coutSource = 0; // out RCAP
+ cmReg.reg.coutPolarity = 0; // Polarity inverted
+ cmReg.reg.autoLoadResetRcap = 0; // Auto load disabled
+ cmReg.reg.hwCtEnableSource = 2; // NOT RCAP
+ cmReg.reg.ctEnableCtrl = 1; // 1: Software, >1 : Hardware
+ cmReg.reg.clockSource = 3; // x4
+ cmReg.reg.countDir = 0; // up
+ cmReg.reg.countDirCtrl = 0; // quadrature
+ cmReg.reg.outputRegLatchCtrl = 0; // latch on read
+ cmReg.reg.preloadRegSel = 0; // PR0
+ cmReg.reg.reserved = 0;
+
+ n = 0;
+ printk("Mode reg=0x%04x, 0x%04lx\n", cmReg.value, ADDR_CHAN_REG(REG_C0M,
+ n));
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, n));
+ udelay(1000);
+ printk("Read back mode reg=0x%04x\n", inw(ADDR_CHAN_REG(REG_C0M, n)));
+
+ // Load the pre-laod register high word
+// value = (sampl_t) (0x55);
+// outw(value, ADDR_CHAN_REG(REG_C0H, n));
+
+ // Load the pre-laod register low word
+// value = (sampl_t)(0xaa55);
+// outw(value, ADDR_CHAN_REG(REG_C0L, n));
+
+ // Write the Counter Control Register
+// outw(value, ADDR_CHAN_REG(REG_C0C, 0));
+
+ // Reset the counter if it is software preload
+ if (cmReg.reg.autoLoadResetRcap == 0) {
+ outw(0x8000, ADDR_CHAN_REG(REG_C0C, n)); // Reset the counter
+ outw(0x4000, ADDR_CHAN_REG(REG_C0C, n)); // Load the counter from PR0
+ }
+
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, n));
+ udelay(1000);
+ printk("Read back mode reg=0x%04x\n", inw(ADDR_CHAN_REG(REG_C0M, n)));
+
+#endif
+ printk("Current registres:\n");
+
+ for (i = 0; i < S526_NUM_PORTS; i++) {
+ printk("0x%02lx: 0x%04x\n", ADDR_REG(s526_ports[i]),
+ inw(ADDR_REG(s526_ports[i])));
+ }
+ 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 s526_detach(comedi_device * dev)
+{
+ printk("comedi%d: s526: remove\n", dev->minor);
+
+ if (dev->iobase > 0)
+ release_region(dev->iobase, S526_IOSIZE);
+
+ return 0;
+}
+
+static int s526_gpct_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int i; // counts the Data
+ int counter_channel = CR_CHAN(insn->chanspec);
+ unsigned short datalow;
+ unsigned short datahigh;
+
+ // Check if (n > 0)
+ if (insn->n <= 0) {
+ printk("s526: INSN_READ: n should be > 0\n");
+ return -EINVAL;
+ }
+ // Read the low word first
+ for (i = 0; i < insn->n; i++) {
+ datalow = inw(ADDR_CHAN_REG(REG_C0L, counter_channel));
+ datahigh = inw(ADDR_CHAN_REG(REG_C0H, counter_channel));
+ data[i] = (int)(datahigh & 0x00FF);
+ data[i] = (data[i] << 16) | (datalow & 0xFFFF);
+// printk("s526 GPCT[%d]: %x(0x%04x, 0x%04x)\n", counter_channel, data[i], datahigh, datalow);
+ }
+ return i;
+}
+
+static int s526_gpct_insn_config(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int subdev_channel = CR_CHAN(insn->chanspec); // Unpack chanspec
+ int i;
+ sampl_t value;
+
+// printk("s526: GPCT_INSN_CONFIG: Configuring Channel %d\n", subdev_channel);
+
+ for (i = 0; i < MAX_GPCT_CONFIG_DATA; i++) {
+ devpriv->s526_gpct_config[subdev_channel].data[i] =
+ insn->data[i];
+// printk("data[%d]=%x\n", i, insn->data[i]);
+ }
+
+ // Check what type of Counter the user requested, data[0] contains
+ // the Application type
+ switch (insn->data[0]) {
+ case INSN_CONFIG_GPCT_QUADRATURE_ENCODER:
+ /*
+ data[0]: Application Type
+ data[1]: Counter Mode Register Value
+ data[2]: Pre-load Register Value
+ data[3]: Conter Control Register
+ */
+ printk("s526: GPCT_INSN_CONFIG: Configuring Encoder\n");
+ devpriv->s526_gpct_config[subdev_channel].app =
+ PositionMeasurement;
+
+/*
+ // Example of Counter Application
+ //One-shot (software trigger)
+ cmReg.reg.coutSource = 0; // out RCAP
+ cmReg.reg.coutPolarity = 1; // Polarity inverted
+ cmReg.reg.autoLoadResetRcap = 0; // Auto load disabled
+ cmReg.reg.hwCtEnableSource = 3; // NOT RCAP
+ cmReg.reg.ctEnableCtrl = 2; // Hardware
+ cmReg.reg.clockSource = 2; // Internal
+ cmReg.reg.countDir = 1; // Down
+ cmReg.reg.countDirCtrl = 1; // Software
+ cmReg.reg.outputRegLatchCtrl = 0; // latch on read
+ cmReg.reg.preloadRegSel = 0; // PR0
+ cmReg.reg.reserved = 0;
+
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
+
+ outw(0x0001, ADDR_CHAN_REG(REG_C0H, subdev_channel));
+ outw(0x3C68, ADDR_CHAN_REG(REG_C0L, subdev_channel));
+
+ outw(0x8000, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Reset the counter
+ outw(0x4000, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Load the counter from PR0
+
+ outw(0x0008, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Reset RCAP (fires one-shot)
+
+*/
+
+#if 1
+ // Set Counter Mode Register
+ cmReg.reg.coutSource = 0; // out RCAP
+ cmReg.reg.coutPolarity = 0; // Polarity inverted
+ cmReg.reg.autoLoadResetRcap = 0; // Auto load disabled
+ cmReg.reg.hwCtEnableSource = 2; // NOT RCAP
+ cmReg.reg.ctEnableCtrl = 1; // 1: Software, >1 : Hardware
+ cmReg.reg.clockSource = 3; // x4
+ cmReg.reg.countDir = 0; // up
+ cmReg.reg.countDirCtrl = 0; // quadrature
+ cmReg.reg.outputRegLatchCtrl = 0; // latch on read
+ cmReg.reg.preloadRegSel = 0; // PR0
+ cmReg.reg.reserved = 0;
+
+ // Set Counter Mode Register
+// printk("s526: Counter Mode register=%x\n", cmReg.value);
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
+
+ // Reset the counter if it is software preload
+ if (cmReg.reg.autoLoadResetRcap == 0) {
+ outw(0x8000, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Reset the counter
+// outw(0x4000, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Load the counter from PR0
+ }
+#else
+ cmReg.reg.countDirCtrl = 0; // 0 quadrature, 1 software control
+
+ // data[1] contains GPCT_X1, GPCT_X2 or GPCT_X4
+ if (insn->data[1] == GPCT_X2) {
+ cmReg.reg.clockSource = 1;
+ } else if (insn->data[1] == GPCT_X4) {
+ cmReg.reg.clockSource = 2;
+ } else {
+ cmReg.reg.clockSource = 0;
+ }
+
+ // When to take into account the indexpulse:
+ if (insn->data[2] == GPCT_IndexPhaseLowLow) {
+ } else if (insn->data[2] == GPCT_IndexPhaseLowHigh) {
+ } else if (insn->data[2] == GPCT_IndexPhaseHighLow) {
+ } else if (insn->data[2] == GPCT_IndexPhaseHighHigh) {
+ }
+ // Take into account the index pulse?
+ if (insn->data[3] == GPCT_RESET_COUNTER_ON_INDEX)
+ cmReg.reg.autoLoadResetRcap = 4; // Auto load with INDEX^
+
+ // Set Counter Mode Register
+ cmReg.value = (sampl_t) (insn->data[1] & 0xFFFF);
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
+
+ // Load the pre-laod register high word
+ value = (sampl_t) ((insn->data[2] >> 16) & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
+
+ // Load the pre-laod register low word
+ value = (sampl_t) (insn->data[2] & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
+
+ // Write the Counter Control Register
+ if (insn->data[3] != 0) {
+ value = (sampl_t) (insn->data[3] & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0C, subdev_channel));
+ }
+ // Reset the counter if it is software preload
+ if (cmReg.reg.autoLoadResetRcap == 0) {
+ outw(0x8000, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Reset the counter
+ outw(0x4000, ADDR_CHAN_REG(REG_C0C, subdev_channel)); // Load the counter from PR0
+ }
+#endif
+ break;
+
+ case INSN_CONFIG_GPCT_SINGLE_PULSE_GENERATOR:
+ /*
+ data[0]: Application Type
+ data[1]: Counter Mode Register Value
+ data[2]: Pre-load Register 0 Value
+ data[3]: Pre-load Register 1 Value
+ data[4]: Conter Control Register
+ */
+ printk("s526: GPCT_INSN_CONFIG: Configuring SPG\n");
+ devpriv->s526_gpct_config[subdev_channel].app =
+ SinglePulseGeneration;
+
+ // Set Counter Mode Register
+ cmReg.value = (sampl_t) (insn->data[1] & 0xFFFF);
+ cmReg.reg.preloadRegSel = 0; // PR0
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
+
+ // Load the pre-laod register 0 high word
+ value = (sampl_t) ((insn->data[2] >> 16) & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
+
+ // Load the pre-laod register 0 low word
+ value = (sampl_t) (insn->data[2] & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
+
+ // Set Counter Mode Register
+ cmReg.value = (sampl_t) (insn->data[1] & 0xFFFF);
+ cmReg.reg.preloadRegSel = 1; // PR1
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
+
+ // Load the pre-laod register 1 high word
+ value = (sampl_t) ((insn->data[3] >> 16) & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
+
+ // Load the pre-laod register 1 low word
+ value = (sampl_t) (insn->data[3] & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
+
+ // Write the Counter Control Register
+ if (insn->data[3] != 0) {
+ value = (sampl_t) (insn->data[3] & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0C, subdev_channel));
+ }
+ break;
+
+ case INSN_CONFIG_GPCT_PULSE_TRAIN_GENERATOR:
+ /*
+ data[0]: Application Type
+ data[1]: Counter Mode Register Value
+ data[2]: Pre-load Register 0 Value
+ data[3]: Pre-load Register 1 Value
+ data[4]: Conter Control Register
+ */
+ printk("s526: GPCT_INSN_CONFIG: Configuring PTG\n");
+ devpriv->s526_gpct_config[subdev_channel].app =
+ PulseTrainGeneration;
+
+ // Set Counter Mode Register
+ cmReg.value = (sampl_t) (insn->data[1] & 0xFFFF);
+ cmReg.reg.preloadRegSel = 0; // PR0
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
+
+ // Load the pre-laod register 0 high word
+ value = (sampl_t) ((insn->data[2] >> 16) & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
+
+ // Load the pre-laod register 0 low word
+ value = (sampl_t) (insn->data[2] & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
+
+ // Set Counter Mode Register
+ cmReg.value = (sampl_t) (insn->data[1] & 0xFFFF);
+ cmReg.reg.preloadRegSel = 1; // PR1
+ outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
+
+ // Load the pre-laod register 1 high word
+ value = (sampl_t) ((insn->data[3] >> 16) & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
+
+ // Load the pre-laod register 1 low word
+ value = (sampl_t) (insn->data[3] & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
+
+ // Write the Counter Control Register
+ if (insn->data[3] != 0) {
+ value = (sampl_t) (insn->data[3] & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0C, subdev_channel));
+ }
+ break;
+
+ default:
+ printk("s526: unsupported GPCT_insn_config\n");
+ return -EINVAL;
+ break;
+ }
+
+ return insn->n;
+}
+
+static int s526_gpct_winsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int subdev_channel = CR_CHAN(insn->chanspec); // Unpack chanspec
+ sampl_t value;
+
+ printk("s526: GPCT_INSN_WRITE on channel %d\n", subdev_channel);
+ cmReg.value = inw(ADDR_CHAN_REG(REG_C0M, subdev_channel));
+ printk("s526: Counter Mode Register: %x\n", cmReg.value);
+ // Check what Application of Counter this channel is configured for
+ switch (devpriv->s526_gpct_config[subdev_channel].app) {
+ case PositionMeasurement:
+ printk("S526: INSN_WRITE: PM\n");
+ outw(0xFFFF & ((*data) >> 16), ADDR_CHAN_REG(REG_C0H,
+ subdev_channel));
+ outw(0xFFFF & (*data), ADDR_CHAN_REG(REG_C0L, subdev_channel));
+ break;
+
+ case SinglePulseGeneration:
+ printk("S526: INSN_WRITE: SPG\n");
+ outw(0xFFFF & ((*data) >> 16), ADDR_CHAN_REG(REG_C0H,
+ subdev_channel));
+ outw(0xFFFF & (*data), ADDR_CHAN_REG(REG_C0L, subdev_channel));
+ break;
+
+ case PulseTrainGeneration:
+ /* data[0] contains the PULSE_WIDTH
+ data[1] contains the PULSE_PERIOD
+ @pre PULSE_PERIOD > PULSE_WIDTH > 0
+ The above periods must be expressed as a multiple of the
+ pulse frequency on the selected source
+ */
+ printk("S526: INSN_WRITE: PTG\n");
+ if ((insn->data[1] > insn->data[0]) && (insn->data[0] > 0)) {
+ (devpriv->s526_gpct_config[subdev_channel]).data[0] =
+ insn->data[0];
+ (devpriv->s526_gpct_config[subdev_channel]).data[1] =
+ insn->data[1];
+ } else {
+ printk("%d \t %d\n", insn->data[1], insn->data[2]);
+ printk("s526: INSN_WRITE: PTG: Problem with Pulse params\n");
+ return -EINVAL;
+ }
+
+ value = (sampl_t) ((*data >> 16) & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
+ value = (sampl_t) (*data & 0xFFFF);
+ outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
+ break;
+ default: // Impossible
+ printk("s526: INSN_WRITE: Functionality %d not implemented yet\n", devpriv->s526_gpct_config[subdev_channel].app);
+ return -EINVAL;
+ break;
+ }
+ // return the number of samples written
+ return insn->n;
+}
+
+#define ISR_ADC_DONE 0x4
+static int s526_ai_insn_config(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int result = -EINVAL;
+
+ if (insn->n < 1)
+ return result;
+
+ result = insn->n;
+
+ /* data[0] : channels was set in relevant bits.
+ data[1] : delay
+ */
+ /* COMMENT: abbotti 2008-07-24: I don't know why you'd want to
+ * enable channels here. The channel should be enabled in the
+ * INSN_READ handler. */
+
+ // Enable ADC interrupt
+ outw(ISR_ADC_DONE, ADDR_REG(REG_IER));
+// printk("s526: ADC current value: 0x%04x\n", inw(ADDR_REG(REG_ADC)));
+ devpriv->s526_ai_config = (data[0] & 0x3FF) << 5;
+ if (data[1] > 0)
+ devpriv->s526_ai_config |= 0x8000; //set the delay
+
+ devpriv->s526_ai_config |= 0x0001; // ADC start bit.
+
+ return result;
+}
+
+/*
+ * "instructions" read/write data in "one-shot" or "software-triggered"
+ * mode.
+ */
+static int s526_ai_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int n, i;
+ int chan = CR_CHAN(insn->chanspec);
+ unsigned short value;
+ unsigned int d;
+ unsigned int status;
+
+ /* Set configured delay, enable channel for this channel only,
+ * select "ADC read" channel, set "ADC start" bit. */
+ value = (devpriv->s526_ai_config & 0x8000) |
+ ((1 << 5) << chan) | (chan << 1) | 0x0001;
+
+ /* convert n samples */
+ for (n = 0; n < insn->n; n++) {
+ /* trigger conversion */
+ outw(value, ADDR_REG(REG_ADC));
+// printk("s526: Wrote 0x%04x to ADC\n", value);
+// printk("s526: ADC reg=0x%04x\n", inw(ADDR_REG(REG_ADC)));
+
+#define TIMEOUT 100
+ /* wait for conversion to end */
+ for (i = 0; i < TIMEOUT; i++) {
+ status = inw(ADDR_REG(REG_ISR));
+ if (status & ISR_ADC_DONE) {
+ outw(ISR_ADC_DONE, ADDR_REG(REG_ISR));
+ break;
+ }
+ }
+ if (i == TIMEOUT) {
+ /* rt_printk() should be used instead of printk()
+ * whenever the code can be called from real-time. */
+ rt_printk("s526: ADC(0x%04x) timeout\n",
+ inw(ADDR_REG(REG_ISR)));
+ return -ETIMEDOUT;
+ }
+
+ /* read data */
+ d = inw(ADDR_REG(REG_ADD));
+// printk("AI[%d]=0x%04x\n", n, (unsigned short)(d & 0xFFFF));
+
+ /* munge data */
+ data[n] = d ^ 0x8000;
+ }
+
+ /* return the number of samples read/written */
+ return n;
+}
+
+static int s526_ao_winsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int i;
+ int chan = CR_CHAN(insn->chanspec);
+ unsigned short val;
+
+// printk("s526_ao_winsn\n");
+ val = chan << 1;
+// outw(val, dev->iobase + REG_DAC);
+ outw(val, ADDR_REG(REG_DAC));
+
+ /* 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++) {
+ /* a typical programming sequence */
+// outw(data[i], dev->iobase + REG_ADD); // write the data to preload register
+ outw(data[i], ADDR_REG(REG_ADD)); // write the data to preload register
+ devpriv->ao_readback[chan] = data[i];
+// outw(val + 1, dev->iobase + REG_DAC); // starts the D/A conversion.
+ outw(val + 1, ADDR_REG(REG_DAC)); // starts the D/A conversion.
+ }
+
+ /* 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 s526_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 s526_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ 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, ADDR_REG(REG_DIO));
+ }
+
+ /* on return, data[1] contains the value of the digital
+ * input and output lines. */
+ data[1] = inw(ADDR_REG(REG_DIO)) & 0xFF; // low 8 bits are the data
+ /* 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 s526_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int chan = CR_CHAN(insn->chanspec);
+ sampl_t value;
+
+ printk("S526 DIO insn_config\n");
+
+ if (insn->n != 1)
+ return -EINVAL;
+
+ value = inw(ADDR_REG(REG_DIO));
+
+ /* 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 (data[0] == COMEDI_OUTPUT) {
+ value |= 1 << (chan + 10); // bit 10/11 set the group 1/2's mode
+ s->io_bits |= (0xF << chan);
+ } else {
+ value &= ~(1 << (chan + 10)); // 1 is output, 0 is input.
+ s->io_bits &= ~(0xF << chan);
+ }
+ outw(value, ADDR_REG(REG_DIO));
+
+ return 1;
+}
+
+/*
+ * A convenient macro that defines init_module() and cleanup_module(),
+ * as necessary.
+ */
+COMEDI_INITCLEANUP(driver_s526);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff