#include "comedi_pci.h"
#include "8255.h"
-#define PCI_VENDOR_ID_CB 0x1307 // PCI vendor number of ComputerBoards
-#define N_BOARDS 10 // Number of boards in cb_pcidda_boards
-#define EEPROM_SIZE 128 // number of entries in eeprom
-#define MAX_AO_CHANNELS 8 // maximum number of ao channels for supported boards
+#define PCI_VENDOR_ID_CB 0x1307 /* PCI vendor number of ComputerBoards */
+#define N_BOARDS 10 /* Number of boards in cb_pcidda_boards */
+#define EEPROM_SIZE 128 /* number of entries in eeprom */
+#define MAX_AO_CHANNELS 8 /* maximum number of ao channels for supported boards */
/* PCI-DDA base addresses */
#define DIGITALIO_BADRINDEX 2
- // DIGITAL I/O is pci_dev->resource[2]
+ /* DIGITAL I/O is pci_dev->resource[2] */
#define DIGITALIO_SIZE 8
- // DIGITAL I/O uses 8 I/O port addresses
+ /* DIGITAL I/O uses 8 I/O port addresses */
#define DAC_BADRINDEX 3
- // DAC is pci_dev->resource[3]
+ /* DAC is pci_dev->resource[3] */
/* Digital I/O registers */
-#define PORT1A 0 // PORT 1A DATA
+#define PORT1A 0 /* PORT 1A DATA */
-#define PORT1B 1 // PORT 1B DATA
+#define PORT1B 1 /* PORT 1B DATA */
-#define PORT1C 2 // PORT 1C DATA
+#define PORT1C 2 /* PORT 1C DATA */
-#define CONTROL1 3 // CONTROL REGISTER 1
+#define CONTROL1 3 /* CONTROL REGISTER 1 */
-#define PORT2A 4 // PORT 2A DATA
+#define PORT2A 4 /* PORT 2A DATA */
-#define PORT2B 5 // PORT 2B DATA
+#define PORT2B 5 /* PORT 2B DATA */
-#define PORT2C 6 // PORT 2C DATA
+#define PORT2C 6 /* PORT 2C DATA */
-#define CONTROL2 7 // CONTROL REGISTER 2
+#define CONTROL2 7 /* CONTROL REGISTER 2 */
/* DAC registers */
-#define DACONTROL 0 // D/A CONTROL REGISTER
-#define SU 0000001 // Simultaneous update enabled
-#define NOSU 0000000 // Simultaneous update disabled
-#define ENABLEDAC 0000002 // Enable specified DAC
-#define DISABLEDAC 0000000 // Disable specified DAC
-#define RANGE2V5 0000000 // 2.5V
-#define RANGE5V 0000200 // 5V
-#define RANGE10V 0000300 // 10V
-#define UNIP 0000400 // Unipolar outputs
-#define BIP 0000000 // Bipolar outputs
-
-#define DACALIBRATION1 4 // D/A CALIBRATION REGISTER 1
-//write bits
-#define SERIAL_IN_BIT 0x1 // serial data input for eeprom, caldacs, reference dac
+#define DACONTROL 0 /* D/A CONTROL REGISTER */
+#define SU 0000001 /* Simultaneous update enabled */
+#define NOSU 0000000 /* Simultaneous update disabled */
+#define ENABLEDAC 0000002 /* Enable specified DAC */
+#define DISABLEDAC 0000000 /* Disable specified DAC */
+#define RANGE2V5 0000000 /* 2.5V */
+#define RANGE5V 0000200 /* 5V */
+#define RANGE10V 0000300 /* 10V */
+#define UNIP 0000400 /* Unipolar outputs */
+#define BIP 0000000 /* Bipolar outputs */
+
+#define DACALIBRATION1 4 /* D/A CALIBRATION REGISTER 1 */
+/* write bits */
+#define SERIAL_IN_BIT 0x1 /* serial data input for eeprom, caldacs, reference dac */
#define CAL_CHANNEL_MASK (0x7 << 1)
#define CAL_CHANNEL_BITS(channel) (((channel) << 1) & CAL_CHANNEL_MASK)
-//read bits
+/* read bits */
#define CAL_COUNTER_MASK 0x1f
-#define CAL_COUNTER_OVERFLOW_BIT 0x20 // calibration counter overflow status bit
-#define AO_BELOW_REF_BIT 0x40 // analog output is less than reference dac voltage
-#define SERIAL_OUT_BIT 0x80 // serial data out, for reading from eeprom
+#define CAL_COUNTER_OVERFLOW_BIT 0x20 /* calibration counter overflow status bit */
+#define AO_BELOW_REF_BIT 0x40 /* analog output is less than reference dac voltage */
+#define SERIAL_OUT_BIT 0x80 /* serial data out, for reading from eeprom */
-#define DACALIBRATION2 6 // D/A CALIBRATION REGISTER 2
-#define SELECT_EEPROM_BIT 0x1 // send serial data in to eeprom
-#define DESELECT_REF_DAC_BIT 0x2 // don't send serial data to MAX542 reference dac
-#define DESELECT_CALDAC_BIT(n) (0x4 << (n)) // don't send serial data to caldac n
-#define DUMMY_BIT 0x40 // manual says to set this bit with no explanation
+#define DACALIBRATION2 6 /* D/A CALIBRATION REGISTER 2 */
+#define SELECT_EEPROM_BIT 0x1 /* send serial data in to eeprom */
+#define DESELECT_REF_DAC_BIT 0x2 /* don't send serial data to MAX542 reference dac */
+#define DESELECT_CALDAC_BIT(n) (0x4 << (n)) /* don't send serial data to caldac n */
+#define DUMMY_BIT 0x40 /* manual says to set this bit with no explanation */
-#define DADATA 8 // FIRST D/A DATA REGISTER (0)
+#define DADATA 8 /* FIRST D/A DATA REGISTER (0) */
static const struct comedi_lrange cb_pcidda_ranges = {
6,
*/
struct cb_pcidda_board {
const char *name;
- char status; // Driver status:
- // 0 - tested
- // 1 - manual read, not tested
- // 2 - manual not read
+ char status; /* Driver status: */
+
+ /*
+ * 0 - tested
+ * 1 - manual read, not tested
+ * 2 - manual not read
+ */
+
unsigned short device_id;
int ao_chans;
int ao_bits;
const struct comedi_lrange *ranges;
};
+
static const struct cb_pcidda_board cb_pcidda_boards[] = {
{
name: "pci-dda02/12",
unsigned long digitalio;
unsigned long dac;
- //unsigned long control_status;
- //unsigned long adc_fifo;
- unsigned int dac_cal1_bits; // bits last written to da calibration register 1
- unsigned int ao_range[MAX_AO_CHANNELS]; // current range settings for output channels
- u16 eeprom_data[EEPROM_SIZE]; // software copy of board's eeprom
+
+ /* unsigned long control_status; */
+ /* unsigned long adc_fifo; */
+
+ unsigned int dac_cal1_bits; /* bits last written to da calibration register 1 */
+ unsigned int ao_range[MAX_AO_CHANNELS]; /* current range settings for output channels */
+ u16 eeprom_data[EEPROM_SIZE]; /* software copy of board's eeprom */
};
/*
static int cb_pcidda_attach(struct comedi_device * dev, struct comedi_devconfig * it);
static int cb_pcidda_detach(struct comedi_device * dev);
-//static int cb_pcidda_ai_rinsn(struct comedi_device *dev,struct comedi_subdevice *s,struct comedi_insn *insn,unsigned int *data);
+/* static int cb_pcidda_ai_rinsn(struct comedi_device *dev,struct comedi_subdevice *s,struct comedi_insn *insn,unsigned int *data); */
static int cb_pcidda_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
struct comedi_insn * insn, unsigned int * data);
-//static int cb_pcidda_ai_cmd(struct comedi_device *dev,struct comedi_subdevice *s);
-//static int cb_pcidda_ai_cmdtest(struct comedi_device *dev,struct comedi_subdevice *s, struct comedi_cmd *cmd);
-//static int cb_pcidda_ns_to_timer(unsigned int *ns,int round);
+
+/* static int cb_pcidda_ai_cmd(struct comedi_device *dev, struct *comedi_subdevice *s);*/
+/* static int cb_pcidda_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd); */
+/* static int cb_pcidda_ns_to_timer(unsigned int *ns,int *round); */
+
static unsigned int cb_pcidda_serial_in(struct comedi_device * dev);
static void cb_pcidda_serial_out(struct comedi_device * dev, unsigned int value,
unsigned int num_bits);
found:
devpriv->pci_dev = pcidev;
dev->board_ptr = cb_pcidda_boards + index;
- // "thisboard" macro can be used from here.
+ /* "thisboard" macro can be used from here. */
printk("Found %s at requested position\n", thisboard->name);
/*
s->maxdata = (1 << thisboard->ao_bits) - 1;
s->range_table = thisboard->ranges;
s->insn_write = cb_pcidda_ao_winsn;
-// s->subdev_flags |= SDF_CMD_READ;
-// s->do_cmd = cb_pcidda_ai_cmd;
-// s->do_cmdtest = cb_pcidda_ai_cmdtest;
- // two 8255 digital io subdevices
+ /* s->subdev_flags |= SDF_CMD_READ; */
+ /* s->do_cmd = cb_pcidda_ai_cmd; */
+ /* s->do_cmdtest = cb_pcidda_ai_cmdtest; */
+
+ /* two 8255 digital io subdevices */
s = dev->subdevices + 1;
subdev_8255_init(dev, s, NULL, devpriv->digitalio);
s = dev->subdevices + 2;
}
printk("\n");
- // set calibrations dacs
+ /* set calibrations dacs */
for (index = 0; index < thisboard->ao_chans; index++)
cb_pcidda_calibrate(dev, index, devpriv->ao_range[index]);
pci_dev_put(devpriv->pci_dev);
}
}
- // cleanup 8255
+ /* cleanup 8255 */
if (dev->subdevices) {
subdev_8255_cleanup(dev, dev->subdevices + 1);
subdev_8255_cleanup(dev, dev->subdevices + 2);
channel = CR_CHAN(insn->chanspec);
range = CR_RANGE(insn->chanspec);
- // adjust calibration dacs if range has changed
+ /* adjust calibration dacs if range has changed */
if (range != devpriv->ao_range[channel])
cb_pcidda_calibrate(dev, channel, range);
return 1;
}
-// lowlevel read from eeprom
+/* lowlevel read from eeprom */
static unsigned int cb_pcidda_serial_in(struct comedi_device * dev)
{
unsigned int value = 0;
int i;
- const int value_width = 16; // number of bits wide values are
+ const int value_width = 16; /* number of bits wide values are */
for (i = 1; i <= value_width; i++) {
- // read bits most significant bit first
+ /* read bits most significant bit first */
if (inw_p(devpriv->dac + DACALIBRATION1) & SERIAL_OUT_BIT) {
value |= 1 << (value_width - i);
}
return value;
}
-// lowlevel write to eeprom/dac
+/* lowlevel write to eeprom/dac */
static void cb_pcidda_serial_out(struct comedi_device * dev, unsigned int value,
unsigned int num_bits)
{
int i;
for (i = 1; i <= num_bits; i++) {
- // send bits most significant bit first
+ /* send bits most significant bit first */
if (value & (1 << (num_bits - i)))
devpriv->dac_cal1_bits |= SERIAL_IN_BIT;
else
}
}
-// reads a 16 bit value from board's eeprom
+/* reads a 16 bit value from board's eeprom */
static unsigned int cb_pcidda_read_eeprom(struct comedi_device * dev,
unsigned int address)
{
unsigned int i;
unsigned int cal2_bits;
unsigned int value;
- const int max_num_caldacs = 4; // one caldac for every two dac channels
- const int read_instruction = 0x6; // bits to send to tell eeprom we want to read
+ const int max_num_caldacs = 4; /* one caldac for every two dac channels */
+ const int read_instruction = 0x6; /* bits to send to tell eeprom we want to read */
const int instruction_length = 3;
const int address_length = 8;
- // send serial output stream to eeprom
+ /* send serial output stream to eeprom */
cal2_bits = SELECT_EEPROM_BIT | DESELECT_REF_DAC_BIT | DUMMY_BIT;
- // deactivate caldacs (one caldac for every two channels)
+ /* deactivate caldacs (one caldac for every two channels) */
for (i = 0; i < max_num_caldacs; i++) {
cal2_bits |= DESELECT_CALDAC_BIT(i);
}
outw_p(cal2_bits, devpriv->dac + DACALIBRATION2);
- // tell eeprom we want to read
+ /* tell eeprom we want to read */
cb_pcidda_serial_out(dev, read_instruction, instruction_length);
- // send address we want to read from
+ /* send address we want to read from */
cb_pcidda_serial_out(dev, address, address_length);
value = cb_pcidda_serial_in(dev);
- // deactivate eeprom
+ /* deactivate eeprom */
cal2_bits &= ~SELECT_EEPROM_BIT;
outw_p(cal2_bits, devpriv->dac + DACALIBRATION2);
return value;
}
-// writes to 8 bit calibration dacs
+/* writes to 8 bit calibration dacs */
static void cb_pcidda_write_caldac(struct comedi_device * dev, unsigned int caldac,
unsigned int channel, unsigned int value)
{
unsigned int cal2_bits;
unsigned int i;
- const int num_channel_bits = 3; // caldacs use 3 bit channel specification
- const int num_caldac_bits = 8; // 8 bit calibration dacs
- const int max_num_caldacs = 4; // one caldac for every two dac channels
+ const int num_channel_bits = 3; /* caldacs use 3 bit channel specification */
+ const int num_caldac_bits = 8; /* 8 bit calibration dacs */
+ const int max_num_caldacs = 4; /* one caldac for every two dac channels */
/* write 3 bit channel */
cb_pcidda_serial_out(dev, channel, num_channel_bits);
- // write 8 bit caldac value
+ /* write 8 bit caldac value */
cb_pcidda_serial_out(dev, value, num_caldac_bits);
- // latch stream into appropriate caldac
- // deselect reference dac
+/*
+* latch stream into appropriate caldac deselect reference dac
+*/
cal2_bits = DESELECT_REF_DAC_BIT | DUMMY_BIT;
- // deactivate caldacs (one caldac for every two channels)
+ /* deactivate caldacs (one caldac for every two channels) */
for (i = 0; i < max_num_caldacs; i++) {
cal2_bits |= DESELECT_CALDAC_BIT(i);
}
- // activate the caldac we want
+ /* activate the caldac we want */
cal2_bits &= ~DESELECT_CALDAC_BIT(caldac);
outw_p(cal2_bits, devpriv->dac + DACALIBRATION2);
- // deactivate caldac
+ /* deactivate caldac */
cal2_bits |= DESELECT_CALDAC_BIT(caldac);
outw_p(cal2_bits, devpriv->dac + DACALIBRATION2);
}
-// returns caldac that calibrates given analog out channel
+/* returns caldac that calibrates given analog out channel */
static unsigned int caldac_number(unsigned int channel)
{
return channel / 2;
}
-// returns caldac channel that provides fine gain for given ao channel
+/* returns caldac channel that provides fine gain for given ao channel */
static unsigned int fine_gain_channel(unsigned int ao_channel)
{
return 4 * (ao_channel % 2);
}
-// returns caldac channel that provides coarse gain for given ao channel
+/* returns caldac channel that provides coarse gain for given ao channel */
static unsigned int coarse_gain_channel(unsigned int ao_channel)
{
return 1 + 4 * (ao_channel % 2);
}
-// returns caldac channel that provides coarse offset for given ao channel
+/* returns caldac channel that provides coarse offset for given ao channel */
static unsigned int coarse_offset_channel(unsigned int ao_channel)
{
return 2 + 4 * (ao_channel % 2);
}
-// returns caldac channel that provides fine offset for given ao channel
+/* returns caldac channel that provides fine offset for given ao channel */
static unsigned int fine_offset_channel(unsigned int ao_channel)
{
return 3 + 4 * (ao_channel % 2);
}
-// returns eeprom address that provides offset for given ao channel and range
+/* returns eeprom address that provides offset for given ao channel and range */
static unsigned int offset_eeprom_address(unsigned int ao_channel,
unsigned int range)
{
return 0x7 + 2 * range + 12 * ao_channel;
}
-// returns eeprom address that provides gain calibration for given ao channel and range
+/* returns eeprom address that provides gain calibration for given ao channel and range */
static unsigned int gain_eeprom_address(unsigned int ao_channel,
unsigned int range)
{
return 0x8 + 2 * range + 12 * ao_channel;
}
-// returns upper byte of eeprom entry, which gives the coarse adjustment values
+/* returns upper byte of eeprom entry, which gives the coarse adjustment values */
static unsigned int eeprom_coarse_byte(unsigned int word)
{
return (word >> 8) & 0xff;
}
-// returns lower byte of eeprom entry, which gives the fine adjustment values
+/* returns lower byte of eeprom entry, which gives the fine adjustment values */
static unsigned int eeprom_fine_byte(unsigned int word)
{
return word & 0xff;
}
-// set caldacs to eeprom values for given channel and range
+/* set caldacs to eeprom values for given channel and range */
static void cb_pcidda_calibrate(struct comedi_device * dev, unsigned int channel,
unsigned int range)
{
unsigned int coarse_offset, fine_offset, coarse_gain, fine_gain;
- // remember range so we can tell when we need to readjust calibration
+ /* remember range so we can tell when we need to readjust calibration */
devpriv->ao_range[channel] = range;
- // get values from eeprom data
+ /* get values from eeprom data */
coarse_offset =
eeprom_coarse_byte(devpriv->
eeprom_data[offset_eeprom_address(channel, range)]);
eeprom_fine_byte(devpriv->
eeprom_data[gain_eeprom_address(channel, range)]);
- // set caldacs
+ /* set caldacs */
cb_pcidda_write_caldac(dev, caldac_number(channel),
coarse_offset_channel(channel), coarse_offset);
cb_pcidda_write_caldac(dev, caldac_number(channel),
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