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Commit f6b49620 authored by Bill Pemberton's avatar Bill Pemberton Committed by Greg Kroah-Hartman
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Staging: comedi: remove C99 comments in ni_labpc.c 

Signed-off-by: default avatarBill Pemberton <wfp5p@virginia.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 30c687c1
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Showing with 189 additions and 189 deletions
drivers/staging/comedi/drivers/ni_labpc.c
View file @ f6b49620
......@@ -74,7 +74,7 @@ NI manuals:
*/
#undef LABPC_DEBUG
//#define LABPC_DEBUG // enable debugging messages
/* #define LABPC_DEBUG enable debugging messages */
#include "../comedidev.h"
......@@ -89,78 +89,78 @@ NI manuals:
#define DRV_NAME "ni_labpc"
#define LABPC_SIZE 32 // size of io region used by board
#define LABPC_TIMER_BASE 500 // 2 MHz master clock
#define LABPC_SIZE 32 /* size of io region used by board */
#define LABPC_TIMER_BASE 500 /* 2 MHz master clock */
/* Registers for the lab-pc+ */
//write-only registers
/* write-only registers */
#define COMMAND1_REG 0x0
#define ADC_GAIN_MASK (0x7 << 4)
#define ADC_CHAN_BITS(x) ((x) & 0x7)
#define ADC_SCAN_EN_BIT 0x80 // enables multi channel scans
#define ADC_SCAN_EN_BIT 0x80 /* enables multi channel scans */
#define COMMAND2_REG 0x1
#define PRETRIG_BIT 0x1 // enable pretriggering (used in conjunction with SWTRIG)
#define HWTRIG_BIT 0x2 // enable paced conversions on external trigger
#define SWTRIG_BIT 0x4 // enable paced conversions
#define CASCADE_BIT 0x8 // use two cascaded counters for pacing
#define PRETRIG_BIT 0x1 /* enable pretriggering (used in conjunction with SWTRIG) */
#define HWTRIG_BIT 0x2 /* enable paced conversions on external trigger */
#define SWTRIG_BIT 0x4 /* enable paced conversions */
#define CASCADE_BIT 0x8 /* use two cascaded counters for pacing */
#define DAC_PACED_BIT(channel) (0x40 << ((channel) & 0x1))
#define COMMAND3_REG 0x2
#define DMA_EN_BIT 0x1 // enable dma transfers
#define DIO_INTR_EN_BIT 0x2 // enable interrupts for 8255
#define DMATC_INTR_EN_BIT 0x4 // enable dma terminal count interrupt
#define TIMER_INTR_EN_BIT 0x8 // enable timer interrupt
#define ERR_INTR_EN_BIT 0x10 // enable error interrupt
#define ADC_FNE_INTR_EN_BIT 0x20 // enable fifo not empty interrupt
#define DMA_EN_BIT 0x1 /* enable dma transfers */
#define DIO_INTR_EN_BIT 0x2 /* enable interrupts for 8255 */
#define DMATC_INTR_EN_BIT 0x4 /* enable dma terminal count interrupt */
#define TIMER_INTR_EN_BIT 0x8 /* enable timer interrupt */
#define ERR_INTR_EN_BIT 0x10 /* enable error interrupt */
#define ADC_FNE_INTR_EN_BIT 0x20 /* enable fifo not empty interrupt */
#define ADC_CONVERT_REG 0x3
#define DAC_LSB_REG(channel) (0x4 + 2 * ((channel) & 0x1))
#define DAC_MSB_REG(channel) (0x5 + 2 * ((channel) & 0x1))
#define ADC_CLEAR_REG 0x8
#define DMATC_CLEAR_REG 0xa
#define TIMER_CLEAR_REG 0xc
#define COMMAND6_REG 0xe // 1200 boards only
#define ADC_COMMON_BIT 0x1 // select ground or common-mode reference
#define ADC_UNIP_BIT 0x2 // adc unipolar
#define DAC_UNIP_BIT(channel) (0x4 << ((channel) & 0x1)) // dac unipolar
#define ADC_FHF_INTR_EN_BIT 0x20 // enable fifo half full interrupt
#define A1_INTR_EN_BIT 0x40 // enable interrupt on end of hardware count
#define ADC_SCAN_UP_BIT 0x80 // scan up from channel zero instead of down to zero
#define COMMAND6_REG 0xe /* 1200 boards only */
#define ADC_COMMON_BIT 0x1 /* select ground or common-mode reference */
#define ADC_UNIP_BIT 0x2 /* adc unipolar */
#define DAC_UNIP_BIT(channel) (0x4 << ((channel) & 0x1)) /* dac unipolar */
#define ADC_FHF_INTR_EN_BIT 0x20 /* enable fifo half full interrupt */
#define A1_INTR_EN_BIT 0x40 /* enable interrupt on end of hardware count */
#define ADC_SCAN_UP_BIT 0x80 /* scan up from channel zero instead of down to zero */
#define COMMAND4_REG 0xf
#define INTERVAL_SCAN_EN_BIT 0x1 // enables 'interval' scanning
#define EXT_SCAN_EN_BIT 0x2 // enables external signal on counter b1 output to trigger scan
#define EXT_CONVERT_OUT_BIT 0x4 // chooses direction (output or input) for EXTCONV* line
#define ADC_DIFF_BIT 0x8 // chooses differential inputs for adc (in conjunction with board jumper)
#define INTERVAL_SCAN_EN_BIT 0x1 /* enables 'interval' scanning */
#define EXT_SCAN_EN_BIT 0x2 /* enables external signal on counter b1 output to trigger scan */
#define EXT_CONVERT_OUT_BIT 0x4 /* chooses direction (output or input) for EXTCONV* line */
#define ADC_DIFF_BIT 0x8 /* chooses differential inputs for adc (in conjunction with board jumper) */
#define EXT_CONVERT_DISABLE_BIT 0x10
#define COMMAND5_REG 0x1c // 1200 boards only, calibration stuff
#define EEPROM_WRITE_UNPROTECT_BIT 0x4 // enable eeprom for write
#define DITHER_EN_BIT 0x8 // enable dithering
#define CALDAC_LOAD_BIT 0x10 // load calibration dac
#define SCLOCK_BIT 0x20 // serial clock - rising edge writes, falling edge reads
#define SDATA_BIT 0x40 // serial data bit for writing to eeprom or calibration dacs
#define EEPROM_EN_BIT 0x80 // enable eeprom for read/write
#define COMMAND5_REG 0x1c /* 1200 boards only, calibration stuff */
#define EEPROM_WRITE_UNPROTECT_BIT 0x4 /* enable eeprom for write */
#define DITHER_EN_BIT 0x8 /* enable dithering */
#define CALDAC_LOAD_BIT 0x10 /* load calibration dac */
#define SCLOCK_BIT 0x20 /* serial clock - rising edge writes, falling edge reads */
#define SDATA_BIT 0x40 /* serial data bit for writing to eeprom or calibration dacs */
#define EEPROM_EN_BIT 0x80 /* enable eeprom for read/write */
#define INTERVAL_COUNT_REG 0x1e
#define INTERVAL_LOAD_REG 0x1f
#define INTERVAL_LOAD_BITS 0x1
// read-only registers
/* read-only registers */
#define STATUS1_REG 0x0
#define DATA_AVAIL_BIT 0x1 // data is available in fifo
#define OVERRUN_BIT 0x2 // overrun has occurred
#define OVERFLOW_BIT 0x4 // fifo overflow
#define TIMER_BIT 0x8 // timer interrupt has occured
#define DMATC_BIT 0x10 // dma terminal count has occured
#define EXT_TRIG_BIT 0x40 // external trigger has occured
#define STATUS2_REG 0x1d // 1200 boards only
#define EEPROM_OUT_BIT 0x1 // programmable eeprom serial output
#define A1_TC_BIT 0x2 // counter A1 terminal count
#define FNHF_BIT 0x4 // fifo not half full
#define DATA_AVAIL_BIT 0x1 /* data is available in fifo */
#define OVERRUN_BIT 0x2 /* overrun has occurred */
#define OVERFLOW_BIT 0x4 /* fifo overflow */
#define TIMER_BIT 0x8 /* timer interrupt has occured */
#define DMATC_BIT 0x10 /* dma terminal count has occured */
#define EXT_TRIG_BIT 0x40 /* external trigger has occured */
#define STATUS2_REG 0x1d /* 1200 boards only */
#define EEPROM_OUT_BIT 0x1 /* programmable eeprom serial output */
#define A1_TC_BIT 0x2 /* counter A1 terminal count */
#define FNHF_BIT 0x4 /* fifo not half full */
#define ADC_FIFO_REG 0xa
#define DIO_BASE_REG 0x10
#define COUNTER_A_BASE_REG 0x14
#define COUNTER_A_CONTROL_REG (COUNTER_A_BASE_REG + 0x3)
#define INIT_A0_BITS 0x14 // check modes put conversion pacer output in harmless state (a0 mode 2)
#define INIT_A1_BITS 0x70 // put hardware conversion counter output in harmless state (a1 mode 0)
#define INIT_A0_BITS 0x14 /* check modes put conversion pacer output in harmless state (a0 mode 2) */
#define INIT_A1_BITS 0x70 /* put hardware conversion counter output in harmless state (a1 mode 0) */
#define COUNTER_B_BASE_REG 0x18
static int labpc_attach(struct comedi_device * dev, struct comedi_devconfig * it);
......@@ -212,9 +212,9 @@ enum scan_mode {
MODE_MULT_CHAN_DOWN,
};
//analog input ranges
/* analog input ranges */
#define NUM_LABPC_PLUS_AI_RANGES 16
// indicates unipolar ranges
/* indicates unipolar ranges */
static const int labpc_plus_is_unipolar[NUM_LABPC_PLUS_AI_RANGES] = {
0,
0,
......@@ -234,7 +234,7 @@ static const int labpc_plus_is_unipolar[NUM_LABPC_PLUS_AI_RANGES] = {
1,
};
// map range index to gain bits
/* map range index to gain bits */
static const int labpc_plus_ai_gain_bits[NUM_LABPC_PLUS_AI_RANGES] = {
0x00,
0x10,
......@@ -276,7 +276,7 @@ static const struct comedi_lrange range_labpc_plus_ai = {
};
#define NUM_LABPC_1200_AI_RANGES 14
// indicates unipolar ranges
/* indicates unipolar ranges */
const int labpc_1200_is_unipolar[NUM_LABPC_1200_AI_RANGES] = {
0,
0,
......@@ -294,7 +294,7 @@ const int labpc_1200_is_unipolar[NUM_LABPC_1200_AI_RANGES] = {
1,
};
// map range index to gain bits
/* map range index to gain bits */
const int labpc_1200_ai_gain_bits[NUM_LABPC_1200_AI_RANGES] = {
0x00,
0x20,
......@@ -331,7 +331,7 @@ const struct comedi_lrange range_labpc_1200_ai = {
}
};
//analog output ranges
/* analog output ranges */
#define AO_RANGE_IS_UNIPOLAR 0x1
static const struct comedi_lrange range_labpc_ao = {
2,
......@@ -411,7 +411,7 @@ static const struct labpc_board_struct labpc_boards[] = {
ai_scan_up:1,
memory_mapped_io:1,
},
// dummy entry so pci board works when comedi_config is passed driver name
/* dummy entry so pci board works when comedi_config is passed driver name */
{
.name = DRV_NAME,
.bustype = pci_bustype,
......@@ -424,8 +424,8 @@ static const struct labpc_board_struct labpc_boards[] = {
*/
#define thisboard ((struct labpc_board_struct *)dev->board_ptr)
static const int dma_buffer_size = 0xff00; // size in bytes of dma buffer
static const int sample_size = 2; // 2 bytes per sample
static const int dma_buffer_size = 0xff00; /* size in bytes of dma buffer */
static const int sample_size = 2; /* 2 bytes per sample */
#define devpriv ((struct labpc_private *)dev->private)
......@@ -481,7 +481,7 @@ int labpc_common_attach(struct comedi_device * dev, unsigned long iobase,
printk("io base address is zero!\n");
return -EINVAL;
}
// request io regions for isa boards
/* request io regions for isa boards */
if (thisboard->bustype == isa_bustype) {
/* check if io addresses are available */
if (!request_region(iobase, LABPC_SIZE,
......@@ -499,7 +499,7 @@ int labpc_common_attach(struct comedi_device * dev, unsigned long iobase,
devpriv->read_byte = labpc_inb;
devpriv->write_byte = labpc_outb;
}
// initialize board's command registers
/* initialize board's command registers */
devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG);
devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG);
devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG);
......@@ -524,12 +524,12 @@ int labpc_common_attach(struct comedi_device * dev, unsigned long iobase,
}
dev->irq = irq;
// grab dma channel
/* grab dma channel */
if (dma_chan > 3) {
printk(" invalid dma channel %u\n", dma_chan);
return -EINVAL;
} else if (dma_chan) {
// allocate dma buffer
/* allocate dma buffer */
devpriv->dma_buffer =
kmalloc(dma_buffer_size, GFP_KERNEL | GFP_DMA);
if (devpriv->dma_buffer == NULL) {
......@@ -562,7 +562,7 @@ int labpc_common_attach(struct comedi_device * dev, unsigned long iobase,
SDF_CMD_READ;
s->n_chan = 8;
s->len_chanlist = 8;
s->maxdata = (1 << 12) - 1; // 12 bit resolution
s->maxdata = (1 << 12) - 1; /* 12 bit resolution */
s->range_table = thisboard->ai_range_table;
s->do_cmd = labpc_ai_cmd;
s->do_cmdtest = labpc_ai_cmdtest;
......@@ -577,7 +577,7 @@ int labpc_common_attach(struct comedi_device * dev, unsigned long iobase,
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_GROUND;
s->n_chan = NUM_AO_CHAN;
s->maxdata = (1 << 12) - 1; // 12 bit resolution
s->maxdata = (1 << 12) - 1; /* 12 bit resolution */
s->range_table = &range_labpc_ao;
s->insn_read = labpc_ao_rinsn;
s->insn_write = labpc_ao_winsn;
......@@ -595,14 +595,14 @@ int labpc_common_attach(struct comedi_device * dev, unsigned long iobase,
/* 8255 dio */
s = dev->subdevices + 2;
// if board uses io memory we have to give a custom callback function to the 8255 driver
/* if board uses io memory we have to give a custom callback function to the 8255 driver */
if (thisboard->memory_mapped_io)
subdev_8255_init(dev, s, labpc_dio_mem_callback,
(unsigned long)(dev->iobase + DIO_BASE_REG));
else
subdev_8255_init(dev, s, NULL, dev->iobase + DIO_BASE_REG);
// calibration subdevices for boards that have one
/* calibration subdevices for boards that have one */
s = dev->subdevices + 3;
if (thisboard->register_layout == labpc_1200_layout) {
s->type = COMEDI_SUBD_CALIB;
......@@ -656,7 +656,7 @@ static int labpc_attach(struct comedi_device * dev, struct comedi_devconfig * it
if (alloc_private(dev, sizeof(struct labpc_private)) < 0)
return -ENOMEM;
// get base address, irq etc. based on bustype
/* get base address, irq etc. based on bustype */
switch (thisboard->bustype) {
case isa_bustype:
iobase = it->options[0];
......@@ -692,7 +692,7 @@ static int labpc_attach(struct comedi_device * dev, struct comedi_devconfig * it
return labpc_common_attach(dev, iobase, irq, dma_chan);
}
// adapted from ni_pcimio for finding mite based boards (pc-1200)
/* adapted from ni_pcimio for finding mite based boards (pc-1200) */
#ifdef CONFIG_COMEDI_PCI
static int labpc_find_device(struct comedi_device *dev, int bus, int slot)
{
......@@ -701,7 +701,7 @@ static int labpc_find_device(struct comedi_device *dev, int bus, int slot)
for (mite = mite_devices; mite; mite = mite->next) {
if (mite->used)
continue;
// if bus/slot are specified then make sure we have the right bus/slot
/* if bus/slot are specified then make sure we have the right bus/slot */
if (bus || slot) {
if (bus != mite->pcidev->bus->number
|| slot != PCI_SLOT(mite->pcidev->devfn))
......@@ -712,7 +712,7 @@ static int labpc_find_device(struct comedi_device *dev, int bus, int slot)
continue;
if (mite_device_id(mite) == labpc_boards[i].device_id) {
devpriv->mite = mite;
// fixup board pointer, in case we were using the dummy "ni_labpc" entry
/* fixup board pointer, in case we were using the dummy "ni_labpc" entry */
dev->board_ptr = &labpc_boards[i];
return 0;
}
......@@ -980,7 +980,7 @@ static int labpc_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice
cmd->stop_src != TRIG_EXT && cmd->stop_src != TRIG_NONE)
err++;
// can't have external stop and start triggers at once
/* can't have external stop and start triggers at once */
if (cmd->start_src == TRIG_EXT && cmd->stop_src == TRIG_EXT)
err++;
......@@ -1008,7 +1008,7 @@ static int labpc_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice
err++;
}
}
// make sure scan timing is not too fast
/* make sure scan timing is not too fast */
if (cmd->scan_begin_src == TRIG_TIMER) {
if (cmd->convert_src == TRIG_TIMER &&
cmd->scan_begin_arg <
......@@ -1024,7 +1024,7 @@ static int labpc_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice
err++;
}
}
// stop source
/* stop source */
switch (cmd->stop_src) {
case TRIG_COUNT:
if (!cmd->stop_arg) {
......@@ -1038,7 +1038,7 @@ static int labpc_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice
err++;
}
break;
// TRIG_EXT doesn't care since it doesn't trigger off a numbered channel
/* TRIG_EXT doesn't care since it doesn't trigger off a numbered channel */
default:
break;
}
......@@ -1081,7 +1081,7 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
range = CR_RANGE(cmd->chanlist[0]);
aref = CR_AREF(cmd->chanlist[0]);
// make sure board is disabled before setting up aquisition
/* make sure board is disabled before setting up aquisition */
comedi_spin_lock_irqsave(&dev->spinlock, flags);
devpriv->command2_bits &= ~SWTRIG_BIT & ~HWTRIG_BIT & ~PRETRIG_BIT;
devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG);
......@@ -1090,68 +1090,68 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
devpriv->command3_bits = 0;
devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG);
// initialize software conversion count
/* initialize software conversion count */
if (cmd->stop_src == TRIG_COUNT) {
devpriv->count = cmd->stop_arg * cmd->chanlist_len;
}
// setup hardware conversion counter
/* setup hardware conversion counter */
if (cmd->stop_src == TRIG_EXT) {
// load counter a1 with count of 3 (pc+ manual says this is minimum allowed) using mode 0
/* load counter a1 with count of 3 (pc+ manual says this is minimum allowed) using mode 0 */
ret = labpc_counter_load(dev, dev->iobase + COUNTER_A_BASE_REG,
1, 3, 0);
if (ret < 0) {
comedi_error(dev, "error loading counter a1");
return -1;
}
} else // otherwise, just put a1 in mode 0 with no count to set its output low
} else /* otherwise, just put a1 in mode 0 with no count to set its output low */
devpriv->write_byte(INIT_A1_BITS,
dev->iobase + COUNTER_A_CONTROL_REG);
// figure out what method we will use to transfer data
if (devpriv->dma_chan && // need a dma channel allocated
// dma unsafe at RT priority, and too much setup time for TRIG_WAKE_EOS for
/* figure out what method we will use to transfer data */
if (devpriv->dma_chan && /* need a dma channel allocated */
/* dma unsafe at RT priority, and too much setup time for TRIG_WAKE_EOS for */
(cmd->flags & (TRIG_WAKE_EOS | TRIG_RT)) == 0 &&
// only available on the isa boards
/* only available on the isa boards */
thisboard->bustype == isa_bustype) {
xfer = isa_dma_transfer;
} else if (thisboard->register_layout == labpc_1200_layout && // pc-plus has no fifo-half full interrupt
// wake-end-of-scan should interrupt on fifo not empty
} else if (thisboard->register_layout == labpc_1200_layout && /* pc-plus has no fifo-half full interrupt */
/* wake-end-of-scan should interrupt on fifo not empty */
(cmd->flags & TRIG_WAKE_EOS) == 0 &&
// make sure we are taking more than just a few points
/* make sure we are taking more than just a few points */
(cmd->stop_src != TRIG_COUNT || devpriv->count > 256)) {
xfer = fifo_half_full_transfer;
} else
xfer = fifo_not_empty_transfer;
devpriv->current_transfer = xfer;
// setup command6 register for 1200 boards
/* setup command6 register for 1200 boards */
if (thisboard->register_layout == labpc_1200_layout) {
// reference inputs to ground or common?
/* reference inputs to ground or common? */
if (aref != AREF_GROUND)
devpriv->command6_bits |= ADC_COMMON_BIT;
else
devpriv->command6_bits &= ~ADC_COMMON_BIT;
// bipolar or unipolar range?
/* bipolar or unipolar range? */
if (thisboard->ai_range_is_unipolar[range])
devpriv->command6_bits |= ADC_UNIP_BIT;
else
devpriv->command6_bits &= ~ADC_UNIP_BIT;
// interrupt on fifo half full?
/* interrupt on fifo half full? */
if (xfer == fifo_half_full_transfer)
devpriv->command6_bits |= ADC_FHF_INTR_EN_BIT;
else
devpriv->command6_bits &= ~ADC_FHF_INTR_EN_BIT;
// enable interrupt on counter a1 terminal count?
/* enable interrupt on counter a1 terminal count? */
if (cmd->stop_src == TRIG_EXT)
devpriv->command6_bits |= A1_INTR_EN_BIT;
else
devpriv->command6_bits &= ~A1_INTR_EN_BIT;
// are we scanning up or down through channels?
/* are we scanning up or down through channels? */
if (labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_UP)
devpriv->command6_bits |= ADC_SCAN_UP_BIT;
else
devpriv->command6_bits &= ~ADC_SCAN_UP_BIT;
// write to register
/* write to register */
devpriv->write_byte(devpriv->command6_bits,
dev->iobase + COMMAND6_REG);
}
......@@ -1162,13 +1162,13 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
channel = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]);
else
channel = CR_CHAN(cmd->chanlist[0]);
// munge channel bits for differential / scan disabled mode
/* munge channel bits for differential / scan disabled mode */
if (labpc_ai_scan_mode(cmd) != MODE_SINGLE_CHAN && aref == AREF_DIFF)
channel *= 2;
devpriv->command1_bits |= ADC_CHAN_BITS(channel);
devpriv->command1_bits |= thisboard->ai_range_code[range];
devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG);
// manual says to set scan enable bit on second pass
/* manual says to set scan enable bit on second pass */
if (labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_UP ||
labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_DOWN) {
devpriv->command1_bits |= ADC_SCAN_EN_BIT;
......@@ -1178,7 +1178,7 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
devpriv->write_byte(devpriv->command1_bits,
dev->iobase + COMMAND1_REG);
}
// setup any external triggering/pacing (command4 register)
/* setup any external triggering/pacing (command4 register) */
devpriv->command4_bits = 0;
if (cmd->convert_src != TRIG_EXT)
devpriv->command4_bits |= EXT_CONVERT_DISABLE_BIT;
......@@ -1189,21 +1189,21 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
if (cmd->scan_begin_src == TRIG_EXT)
devpriv->command4_bits |= EXT_SCAN_EN_BIT;
}
// single-ended/differential
/* single-ended/differential */
if (aref == AREF_DIFF)
devpriv->command4_bits |= ADC_DIFF_BIT;
devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG);
devpriv->write_byte(cmd->chanlist_len,
dev->iobase + INTERVAL_COUNT_REG);
// load count
/* load count */
devpriv->write_byte(INTERVAL_LOAD_BITS,
dev->iobase + INTERVAL_LOAD_REG);
if (cmd->convert_src == TRIG_TIMER || cmd->scan_begin_src == TRIG_TIMER) {
// set up pacing
/* set up pacing */
labpc_adc_timing(dev, cmd);
// load counter b0 in mode 3
/* load counter b0 in mode 3 */
ret = labpc_counter_load(dev, dev->iobase + COUNTER_B_BASE_REG,
0, devpriv->divisor_b0, 3);
if (ret < 0) {
......@@ -1211,9 +1211,9 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
return -1;
}
}
// set up conversion pacing
/* set up conversion pacing */
if (labpc_ai_convert_period(cmd)) {
// load counter a0 in mode 2
/* load counter a0 in mode 2 */
ret = labpc_counter_load(dev, dev->iobase + COUNTER_A_BASE_REG,
0, devpriv->divisor_a0, 2);
if (ret < 0) {
......@@ -1224,9 +1224,9 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
devpriv->write_byte(INIT_A0_BITS,
dev->iobase + COUNTER_A_CONTROL_REG);
// set up scan pacing
/* set up scan pacing */
if (labpc_ai_scan_period(cmd)) {
// load counter b1 in mode 2
/* load counter b1 in mode 2 */
ret = labpc_counter_load(dev, dev->iobase + COUNTER_B_BASE_REG,
1, devpriv->divisor_b1, 2);
if (ret < 0) {
......@@ -1237,7 +1237,7 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
labpc_clear_adc_fifo(dev);
// set up dma transfer
/* set up dma transfer */
if (xfer == isa_dma_transfer) {
irq_flags = claim_dma_lock();
disable_dma(devpriv->dma_chan);
......@@ -1246,7 +1246,7 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
clear_dma_ff(devpriv->dma_chan);
set_dma_addr(devpriv->dma_chan,
virt_to_bus(devpriv->dma_buffer));
// set appropriate size of transfer
/* set appropriate size of transfer */
devpriv->dma_transfer_size = labpc_suggest_transfer_size(*cmd);
if (cmd->stop_src == TRIG_COUNT &&
devpriv->count * sample_size <
......@@ -1257,24 +1257,24 @@ static int labpc_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size);
enable_dma(devpriv->dma_chan);
release_dma_lock(irq_flags);
// enable board's dma
/* enable board's dma */
devpriv->command3_bits |= DMA_EN_BIT | DMATC_INTR_EN_BIT;
} else
devpriv->command3_bits &= ~DMA_EN_BIT & ~DMATC_INTR_EN_BIT;
// enable error interrupts
/* enable error interrupts */
devpriv->command3_bits |= ERR_INTR_EN_BIT;
// enable fifo not empty interrupt?
/* enable fifo not empty interrupt? */
if (xfer == fifo_not_empty_transfer)
devpriv->command3_bits |= ADC_FNE_INTR_EN_BIT;
else
devpriv->command3_bits &= ~ADC_FNE_INTR_EN_BIT;
devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG);
// startup aquisition
/* startup aquisition */
// command2 reg
// use 2 cascaded counters for pacing
/* command2 reg */
/* use 2 cascaded counters for pacing */
comedi_spin_lock_irqsave(&dev->spinlock, flags);
devpriv->command2_bits |= CASCADE_BIT;
switch (cmd->start_src) {
......@@ -1325,7 +1325,7 @@ static irqreturn_t labpc_interrupt(int irq, void *d PT_REGS_ARG)
cmd = &async->cmd;
async->events = 0;
// read board status
/* read board status */
devpriv->status1_bits = devpriv->read_byte(dev->iobase + STATUS1_REG);
if (thisboard->register_layout == labpc_1200_layout)
devpriv->status2_bits =
......@@ -1339,7 +1339,7 @@ static irqreturn_t labpc_interrupt(int irq, void *d PT_REGS_ARG)
}
if (devpriv->status1_bits & OVERRUN_BIT) {
// clear error interrupt
/* clear error interrupt */
devpriv->write_byte(0x1, dev->iobase + ADC_CLEAR_REG);
async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
comedi_event(dev, s);
......@@ -1348,7 +1348,7 @@ static irqreturn_t labpc_interrupt(int irq, void *d PT_REGS_ARG)
}
if (devpriv->current_transfer == isa_dma_transfer) {
// if a dma terminal count of external stop trigger has occurred
/* if a dma terminal count of external stop trigger has occurred */
if (devpriv->status1_bits & DMATC_BIT ||
(thisboard->register_layout == labpc_1200_layout
&& devpriv->status2_bits & A1_TC_BIT)) {
......@@ -1359,19 +1359,19 @@ static irqreturn_t labpc_interrupt(int irq, void *d PT_REGS_ARG)
if (devpriv->status1_bits & TIMER_BIT) {
comedi_error(dev, "handled timer interrupt?");
// clear it
/* clear it */
devpriv->write_byte(0x1, dev->iobase + TIMER_CLEAR_REG);
}
if (devpriv->status1_bits & OVERFLOW_BIT) {
// clear error interrupt
/* clear error interrupt */
devpriv->write_byte(0x1, dev->iobase + ADC_CLEAR_REG);
async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
comedi_event(dev, s);
comedi_error(dev, "overflow");
return IRQ_HANDLED;
}
// handle external stop trigger
/* handle external stop trigger */
if (cmd->stop_src == TRIG_EXT) {
if (devpriv->status2_bits & A1_TC_BIT) {
labpc_drain_dregs(dev);
......@@ -1392,7 +1392,7 @@ static irqreturn_t labpc_interrupt(int irq, void *d PT_REGS_ARG)
return IRQ_HANDLED;
}
// read all available samples from ai fifo
/* read all available samples from ai fifo */
static int labpc_drain_fifo(struct comedi_device * dev)
{
unsigned int lsb, msb;
......@@ -1405,7 +1405,7 @@ static int labpc_drain_fifo(struct comedi_device * dev)
for (i = 0; (devpriv->status1_bits & DATA_AVAIL_BIT) && i < timeout;
i++) {
// quit if we have all the data we want
/* quit if we have all the data we want */
if (async->cmd.stop_src == TRIG_COUNT) {
if (devpriv->count == 0)
break;
......@@ -1444,7 +1444,7 @@ static void labpc_drain_dma(struct comedi_device * dev)
* count and address get set correctly */
clear_dma_ff(devpriv->dma_chan);
// figure out how many points to read
/* figure out how many points to read */
max_points = devpriv->dma_transfer_size / sample_size;
/* residue is the number of points left to be done on the dma
* transfer. It should always be zero at this point unless
......@@ -1455,7 +1455,7 @@ static void labpc_drain_dma(struct comedi_device * dev)
if (devpriv->count < num_points && async->cmd.stop_src == TRIG_COUNT)
num_points = devpriv->count;
// figure out how many points will be stored next time
/* figure out how many points will be stored next time */
leftover = 0;
if (async->cmd.stop_src != TRIG_COUNT) {
leftover = devpriv->dma_transfer_size / sample_size;
......@@ -1472,7 +1472,7 @@ static void labpc_drain_dma(struct comedi_device * dev)
if (async->cmd.stop_src == TRIG_COUNT)
devpriv->count -= num_points;
// set address and count for next transfer
/* set address and count for next transfer */
set_dma_addr(devpriv->dma_chan, virt_to_bus(devpriv->dma_buffer));
set_dma_count(devpriv->dma_chan, leftover * sample_size);
release_dma_lock(flags);
......@@ -1486,7 +1486,7 @@ static void handle_isa_dma(struct comedi_device * dev)
enable_dma(devpriv->dma_chan);
// clear dma tc interrupt
/* clear dma tc interrupt */
devpriv->write_byte(0x1, dev->iobase + DMATC_CLEAR_REG);
}
......@@ -1509,13 +1509,13 @@ static int labpc_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice *
int timeout = 1000;
unsigned long flags;
// disable timed conversions
/* disable timed conversions */
comedi_spin_lock_irqsave(&dev->spinlock, flags);
devpriv->command2_bits &= ~SWTRIG_BIT & ~HWTRIG_BIT & ~PRETRIG_BIT;
devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG);
comedi_spin_unlock_irqrestore(&dev->spinlock, flags);
// disable interrupt generation and dma
/* disable interrupt generation and dma */
devpriv->command3_bits = 0;
devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG);
......@@ -1524,41 +1524,41 @@ static int labpc_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice *
chan = CR_CHAN(insn->chanspec);
range = CR_RANGE(insn->chanspec);
devpriv->command1_bits |= thisboard->ai_range_code[range];
// munge channel bits for differential/scan disabled mode
/* munge channel bits for differential/scan disabled mode */
if (CR_AREF(insn->chanspec) == AREF_DIFF)
chan *= 2;
devpriv->command1_bits |= ADC_CHAN_BITS(chan);
devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG);
// setup command6 register for 1200 boards
/* setup command6 register for 1200 boards */
if (thisboard->register_layout == labpc_1200_layout) {
// reference inputs to ground or common?
/* reference inputs to ground or common? */
if (CR_AREF(insn->chanspec) != AREF_GROUND)
devpriv->command6_bits |= ADC_COMMON_BIT;
else
devpriv->command6_bits &= ~ADC_COMMON_BIT;
// bipolar or unipolar range?
/* bipolar or unipolar range? */
if (thisboard->ai_range_is_unipolar[range])
devpriv->command6_bits |= ADC_UNIP_BIT;
else
devpriv->command6_bits &= ~ADC_UNIP_BIT;
// don't interrupt on fifo half full
/* don't interrupt on fifo half full */
devpriv->command6_bits &= ~ADC_FHF_INTR_EN_BIT;
// don't enable interrupt on counter a1 terminal count?
/* don't enable interrupt on counter a1 terminal count? */
devpriv->command6_bits &= ~A1_INTR_EN_BIT;
// write to register
/* write to register */
devpriv->write_byte(devpriv->command6_bits,
dev->iobase + COMMAND6_REG);
}
// setup command4 register
/* setup command4 register */
devpriv->command4_bits = 0;
devpriv->command4_bits |= EXT_CONVERT_DISABLE_BIT;
// single-ended/differential
/* single-ended/differential */
if (CR_AREF(insn->chanspec) == AREF_DIFF)
devpriv->command4_bits |= ADC_DIFF_BIT;
devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG);
// initialize pacer counter output to make sure it doesn't cause any problems
/* initialize pacer counter output to make sure it doesn't cause any problems */
devpriv->write_byte(INIT_A0_BITS, dev->iobase + COUNTER_A_CONTROL_REG);
labpc_clear_adc_fifo(dev);
......@@ -1585,7 +1585,7 @@ static int labpc_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice *
return n;
}
// analog output insn
/* analog output insn */
static int labpc_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
struct comedi_insn * insn, unsigned int * data)
{
......@@ -1595,7 +1595,7 @@ static int labpc_ao_winsn(struct comedi_device * dev, struct comedi_subdevice *
channel = CR_CHAN(insn->chanspec);
// turn off pacing of analog output channel
/* turn off pacing of analog output channel */
/* note: hardware bug in daqcard-1200 means pacing cannot
* be independently enabled/disabled for its the two channels */
comedi_spin_lock_irqsave(&dev->spinlock, flags);
......@@ -1603,30 +1603,30 @@ static int labpc_ao_winsn(struct comedi_device * dev, struct comedi_subdevice *
devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG);
comedi_spin_unlock_irqrestore(&dev->spinlock, flags);
// set range
/* set range */
if (thisboard->register_layout == labpc_1200_layout) {
range = CR_RANGE(insn->chanspec);
if (range & AO_RANGE_IS_UNIPOLAR)
devpriv->command6_bits |= DAC_UNIP_BIT(channel);
else
devpriv->command6_bits &= ~DAC_UNIP_BIT(channel);
// write to register
/* write to register */
devpriv->write_byte(devpriv->command6_bits,
dev->iobase + COMMAND6_REG);
}
// send data
/* send data */
lsb = data[0] & 0xff;
msb = (data[0] >> 8) & 0xff;
devpriv->write_byte(lsb, dev->iobase + DAC_LSB_REG(channel));
devpriv->write_byte(msb, dev->iobase + DAC_MSB_REG(channel));
// remember value for readback
/* remember value for readback */
devpriv->ao_value[channel] = data[0];
return 1;
}
// analog output readback insn
/* analog output readback insn */
static int labpc_ao_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
struct comedi_insn * insn, unsigned int * data)
{
......@@ -1666,7 +1666,7 @@ static int labpc_eeprom_write_insn(struct comedi_device * dev, struct comedi_sub
int channel = CR_CHAN(insn->chanspec);
int ret;
// only allow writes to user area of eeprom
/* only allow writes to user area of eeprom */
if (channel < 16 || channel > 127) {
printk("eeprom writes are only allowed to channels 16 through 127 (the pointer and user areas)");
return -EINVAL;
......@@ -1679,7 +1679,7 @@ static int labpc_eeprom_write_insn(struct comedi_device * dev, struct comedi_sub
return 1;
}
// utility function that suggests a dma transfer size in bytes
/* utility function that suggests a dma transfer size in bytes */
static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd)
{
unsigned int size;
......@@ -1687,14 +1687,14 @@ static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd)
if (cmd.convert_src == TRIG_TIMER)
freq = 1000000000 / cmd.convert_arg;
// return some default value
/* return some default value */
else
freq = 0xffffffff;
// make buffer fill in no more than 1/3 second
/* make buffer fill in no more than 1/3 second */
size = (freq / 3) * sample_size;
// set a minimum and maximum size allowed
/* set a minimum and maximum size allowed */
if (size > dma_buffer_size)
size = dma_buffer_size - dma_buffer_size % sample_size;
else if (size < sample_size)
......@@ -1703,16 +1703,16 @@ static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd)
return size;
}
// figures out what counter values to use based on command
/* figures out what counter values to use based on command */
static void labpc_adc_timing(struct comedi_device * dev, struct comedi_cmd * cmd)
{
const int max_counter_value = 0x10000; // max value for 16 bit counter in mode 2
const int min_counter_value = 2; // min value for 16 bit counter in mode 2
const int max_counter_value = 0x10000; /* max value for 16 bit counter in mode 2 */
const int min_counter_value = 2; /* min value for 16 bit counter in mode 2 */
unsigned int base_period;
// if both convert and scan triggers are TRIG_TIMER, then they both rely on counter b0
/* if both convert and scan triggers are TRIG_TIMER, then they both rely on counter b0 */
if (labpc_ai_convert_period(cmd) && labpc_ai_scan_period(cmd)) {
// pick the lowest b0 divisor value we can (for maximum input clock speed on convert and scan counters)
/* pick the lowest b0 divisor value we can (for maximum input clock speed on convert and scan counters) */
devpriv->divisor_b0 = (labpc_ai_scan_period(cmd) - 1) /
(LABPC_TIMER_BASE * max_counter_value) + 1;
if (devpriv->divisor_b0 < min_counter_value)
......@@ -1722,7 +1722,7 @@ static void labpc_adc_timing(struct comedi_device * dev, struct comedi_cmd * cmd
base_period = LABPC_TIMER_BASE * devpriv->divisor_b0;
// set a0 for conversion frequency and b1 for scan frequency
/* set a0 for conversion frequency and b1 for scan frequency */
switch (cmd->flags & TRIG_ROUND_MASK) {
default:
case TRIG_ROUND_NEAREST:
......@@ -1748,7 +1748,7 @@ static void labpc_adc_timing(struct comedi_device * dev, struct comedi_cmd * cmd
labpc_ai_scan_period(cmd) / base_period;
break;
}
// make sure a0 and b1 values are acceptable
/* make sure a0 and b1 values are acceptable */
if (devpriv->divisor_a0 < min_counter_value)
devpriv->divisor_a0 = min_counter_value;
if (devpriv->divisor_a0 > max_counter_value)
......@@ -1757,12 +1757,12 @@ static void labpc_adc_timing(struct comedi_device * dev, struct comedi_cmd * cmd
devpriv->divisor_b1 = min_counter_value;
if (devpriv->divisor_b1 > max_counter_value)
devpriv->divisor_b1 = max_counter_value;
// write corrected timings to command
/* write corrected timings to command */
labpc_set_ai_convert_period(cmd,
base_period * devpriv->divisor_a0);
labpc_set_ai_scan_period(cmd,
base_period * devpriv->divisor_b1);
// if only one TRIG_TIMER is used, we can employ the generic cascaded timing functions
/* if only one TRIG_TIMER is used, we can employ the generic cascaded timing functions */
} else if (labpc_ai_scan_period(cmd)) {
unsigned int scan_period;
......@@ -1795,16 +1795,16 @@ static int labpc_dio_mem_callback(int dir, int port, int data,
}
}
// lowlevel write to eeprom/dac
/* lowlevel write to eeprom/dac */
static void labpc_serial_out(struct comedi_device * dev, unsigned int value,
unsigned int value_width)
{
int i;
for (i = 1; i <= value_width; i++) {
// clear serial clock
/* clear serial clock */
devpriv->command5_bits &= ~SCLOCK_BIT;
// send bits most significant bit first
/* send bits most significant bit first */
if (value & (1 << (value_width - i)))
devpriv->command5_bits |= SDATA_BIT;
else
......@@ -1812,7 +1812,7 @@ static void labpc_serial_out(struct comedi_device * dev, unsigned int value,
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits,
dev->iobase + COMMAND5_REG);
// set clock to load bit
/* set clock to load bit */
devpriv->command5_bits |= SCLOCK_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits,
......@@ -1820,25 +1820,25 @@ static void labpc_serial_out(struct comedi_device * dev, unsigned int value,
}
}
// lowlevel read from eeprom
/* lowlevel read from eeprom */
static unsigned int labpc_serial_in(struct comedi_device * dev)
{
unsigned int value = 0;
int i;
const int value_width = 8; // number of bits wide values are
const int value_width = 8; /* number of bits wide values are */
for (i = 1; i <= value_width; i++) {
// set serial clock
/* set serial clock */
devpriv->command5_bits |= SCLOCK_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits,
dev->iobase + COMMAND5_REG);
// clear clock bit
/* clear clock bit */
devpriv->command5_bits &= ~SCLOCK_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits,
dev->iobase + COMMAND5_REG);
// read bits most significant bit first
/* read bits most significant bit first */
comedi_udelay(1);
devpriv->status2_bits =
devpriv->read_byte(dev->iobase + STATUS2_REG);
......@@ -1853,10 +1853,10 @@ static unsigned int labpc_serial_in(struct comedi_device * dev)
static unsigned int labpc_eeprom_read(struct comedi_device * dev, unsigned int address)
{
unsigned int value;
const int read_instruction = 0x3; // bits to tell eeprom to expect a read
const int write_length = 8; // 8 bit write lengths to eeprom
const int read_instruction = 0x3; /* bits to tell eeprom to expect a read */
const int write_length = 8; /* 8 bit write lengths to eeprom */
// enable read/write to eeprom
/* enable read/write to eeprom */
devpriv->command5_bits &= ~EEPROM_EN_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
......@@ -1864,14 +1864,14 @@ static unsigned int labpc_eeprom_read(struct comedi_device * dev, unsigned int a
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
// send read instruction
/* send read instruction */
labpc_serial_out(dev, read_instruction, write_length);
// send 8 bit address to read from
/* send 8 bit address to read from */
labpc_serial_out(dev, address, write_length);
// read result
/* read result */
value = labpc_serial_in(dev);
// disable read/write to eeprom
/* disable read/write to eeprom */
devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
......@@ -1884,12 +1884,12 @@ static unsigned int labpc_eeprom_write(struct comedi_device * dev,
{
const int write_enable_instruction = 0x6;
const int write_instruction = 0x2;
const int write_length = 8; // 8 bit write lengths to eeprom
const int write_length = 8; /* 8 bit write lengths to eeprom */
const int write_in_progress_bit = 0x1;
const int timeout = 10000;
int i;
// make sure there isn't already a write in progress
/* make sure there isn't already a write in progress */
for (i = 0; i < timeout; i++) {
if ((labpc_eeprom_read_status(dev) & write_in_progress_bit) ==
0)
......@@ -1899,10 +1899,10 @@ static unsigned int labpc_eeprom_write(struct comedi_device * dev,
comedi_error(dev, "eeprom write timed out");
return -ETIME;
}
// update software copy of eeprom
/* update software copy of eeprom */
devpriv->eeprom_data[address] = value;
// enable read/write to eeprom
/* enable read/write to eeprom */
devpriv->command5_bits &= ~EEPROM_EN_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
......@@ -1910,26 +1910,26 @@ static unsigned int labpc_eeprom_write(struct comedi_device * dev,
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
// send write_enable instruction
/* send write_enable instruction */
labpc_serial_out(dev, write_enable_instruction, write_length);
devpriv->command5_bits &= ~EEPROM_EN_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
// send write instruction
/* send write instruction */
devpriv->command5_bits |= EEPROM_EN_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
labpc_serial_out(dev, write_instruction, write_length);
// send 8 bit address to write to
/* send 8 bit address to write to */
labpc_serial_out(dev, address, write_length);
// write value
/* write value */
labpc_serial_out(dev, value, write_length);
devpriv->command5_bits &= ~EEPROM_EN_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
// disable read/write to eeprom
/* disable read/write to eeprom */
devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
......@@ -1941,9 +1941,9 @@ static unsigned int labpc_eeprom_read_status(struct comedi_device * dev)
{
unsigned int value;
const int read_status_instruction = 0x5;
const int write_length = 8; // 8 bit write lengths to eeprom
const int write_length = 8; /* 8 bit write lengths to eeprom */
// enable read/write to eeprom
/* enable read/write to eeprom */
devpriv->command5_bits &= ~EEPROM_EN_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
......@@ -1951,12 +1951,12 @@ static unsigned int labpc_eeprom_read_status(struct comedi_device * dev)
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
// send read status instruction
/* send read status instruction */
labpc_serial_out(dev, read_status_instruction, write_length);
// read result
/* read result */
value = labpc_serial_in(dev);
// disable read/write to eeprom
/* disable read/write to eeprom */
devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
......@@ -1964,7 +1964,7 @@ static unsigned int labpc_eeprom_read_status(struct comedi_device * dev)
return value;
}
// writes to 8 bit calibration dacs
/* writes to 8 bit calibration dacs */
static void write_caldac(struct comedi_device * dev, unsigned int channel,
unsigned int value)
{
......@@ -1972,18 +1972,18 @@ static void write_caldac(struct comedi_device * dev, unsigned int channel,
return;
devpriv->caldac[channel] = value;
// clear caldac load bit and make sure we don't write to eeprom
/* clear caldac load bit and make sure we don't write to eeprom */
devpriv->command5_bits &=
~CALDAC_LOAD_BIT & ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
// write 4 bit channel
/* write 4 bit channel */
labpc_serial_out(dev, channel, 4);
// write 8 bit caldac value
/* write 8 bit caldac value */
labpc_serial_out(dev, value, 8);
// set and clear caldac bit to load caldac value
/* set and clear caldac bit to load caldac value */
devpriv->command5_bits |= CALDAC_LOAD_BIT;
comedi_udelay(1);
devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
......
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