*/
+#include <linux/interrupt.h>
#include "../comedidev.h"
#include <linux/ioport.h>
#include "comedi_fc.h"
#define A2150_SIZE 28
-#define A2150_DMA_BUFFER_SIZE 0xff00 // size in bytes of dma buffer
+#define A2150_DMA_BUFFER_SIZE 0xff00 /* size in bytes of dma buffer */
-//#define A2150_DEBUG // enable debugging code
-#undef A2150_DEBUG // disable debugging code
+/* #define A2150_DEBUG enable debugging code */
+#undef A2150_DEBUG /* disable debugging code */
/* Registers and bits */
#define CONFIG_REG 0x0
#define CLOCK_SELECT_BITS(x) (((x) & 0x3) << 3)
#define CLOCK_DIVISOR_BITS(x) (((x) & 0x3) << 5)
#define CLOCK_MASK (0xf << 3)
-#define ENABLE0_BIT 0x80 // enable (don't internally ground) channels 0 and 1
-#define ENABLE1_BIT 0x100 // enable (don't internally ground) channels 2 and 3
-#define AC0_BIT 0x200 // ac couple channels 0,1
-#define AC1_BIT 0x400 // ac couple channels 2,3
-#define APD_BIT 0x800 // analog power down
-#define DPD_BIT 0x1000 // digital power down
-#define TRIGGER_REG 0x2 // trigger config register
+#define ENABLE0_BIT 0x80 /* enable (don't internally ground) channels 0 and 1 */
+#define ENABLE1_BIT 0x100 /* enable (don't internally ground) channels 2 and 3 */
+#define AC0_BIT 0x200 /* ac couple channels 0,1 */
+#define AC1_BIT 0x400 /* ac couple channels 2,3 */
+#define APD_BIT 0x800 /* analog power down */
+#define DPD_BIT 0x1000 /* digital power down */
+#define TRIGGER_REG 0x2 /* trigger config register */
#define POST_TRIGGER_BITS 0x2
#define DELAY_TRIGGER_BITS 0x3
-#define HW_TRIG_EN 0x10 // enable hardware trigger
-#define FIFO_START_REG 0x6 // software start aquistion trigger
-#define FIFO_RESET_REG 0x8 // clears fifo + fifo flags
-#define FIFO_DATA_REG 0xa // read data
-#define DMA_TC_CLEAR_REG 0xe // clear dma terminal count interrupt
-#define STATUS_REG 0x12 // read only
-#define FNE_BIT 0x1 // fifo not empty
-#define OVFL_BIT 0x8 // fifo overflow
-#define EDAQ_BIT 0x10 // end of aquisition interrupt
-#define DCAL_BIT 0x20 // offset calibration in progress
-#define INTR_BIT 0x40 // interrupt has occured
-#define DMA_TC_BIT 0x80 // dma terminal count interrupt has occured
+#define HW_TRIG_EN 0x10 /* enable hardware trigger */
+#define FIFO_START_REG 0x6 /* software start aquistion trigger */
+#define FIFO_RESET_REG 0x8 /* clears fifo + fifo flags */
+#define FIFO_DATA_REG 0xa /* read data */
+#define DMA_TC_CLEAR_REG 0xe /* clear dma terminal count interrupt */
+#define STATUS_REG 0x12 /* read only */
+#define FNE_BIT 0x1 /* fifo not empty */
+#define OVFL_BIT 0x8 /* fifo overflow */
+#define EDAQ_BIT 0x10 /* end of aquisition interrupt */
+#define DCAL_BIT 0x20 /* offset calibration in progress */
+#define INTR_BIT 0x40 /* interrupt has occured */
+#define DMA_TC_BIT 0x80 /* dma terminal count interrupt has occured */
#define ID_BITS(x) (((x) >> 8) & 0x3)
-#define IRQ_DMA_CNTRL_REG 0x12 // write only
-#define DMA_CHAN_BITS(x) ((x) & 0x7) // sets dma channel
-#define DMA_EN_BIT 0x8 // enables dma
-#define IRQ_LVL_BITS(x) (((x) & 0xf) << 4) // sets irq level
-#define FIFO_INTR_EN_BIT 0x100 // enable fifo interrupts
-#define FIFO_INTR_FHF_BIT 0x200 // interrupt fifo half full
-#define DMA_INTR_EN_BIT 0x800 // enable interrupt on dma terminal count
-#define DMA_DEM_EN_BIT 0x1000 // enables demand mode dma
+#define IRQ_DMA_CNTRL_REG 0x12 /* write only */
+#define DMA_CHAN_BITS(x) ((x) & 0x7) /* sets dma channel */
+#define DMA_EN_BIT 0x8 /* enables dma */
+#define IRQ_LVL_BITS(x) (((x) & 0xf) << 4) /* sets irq level */
+#define FIFO_INTR_EN_BIT 0x100 /* enable fifo interrupts */
+#define FIFO_INTR_FHF_BIT 0x200 /* interrupt fifo half full */
+#define DMA_INTR_EN_BIT 0x800 /* enable interrupt on dma terminal count */
+#define DMA_DEM_EN_BIT 0x1000 /* enables demand mode dma */
#define I8253_BASE_REG 0x14
#define I8253_MODE_REG 0x17
-#define HW_COUNT_DISABLE 0x30 // disable hardware counting of conversions
+#define HW_COUNT_DISABLE 0x30 /* disable hardware counting of conversions */
-typedef struct a2150_board_struct {
+struct a2150_board {
const char *name;
- int clock[4]; // master clock periods, in nanoseconds
- int num_clocks; // number of available master clock speeds
- int ai_speed; // maximum conversion rate in nanoseconds
-} a2150_board;
+ int clock[4]; /* master clock periods, in nanoseconds */
+ int num_clocks; /* number of available master clock speeds */
+ int ai_speed; /* maximum conversion rate in nanoseconds */
+};
-//analog input range
+/* analog input range */
static const struct comedi_lrange range_a2150 = {
1,
{
- RANGE(-2.828, 2.828),
- }
+ RANGE(-2.828, 2.828),
+ }
};
-// enum must match board indices
+/* enum must match board indices */
enum { a2150_c, a2150_s };
-static const a2150_board a2150_boards[] = {
+static const struct a2150_board a2150_boards[] = {
{
- name: "at-a2150c",
- clock: {31250, 22676, 20833, 19531},
- num_clocks:4,
- ai_speed:19531,
- },
+ .name = "at-a2150c",
+ .clock = {31250, 22676, 20833, 19531},
+ .num_clocks = 4,
+ .ai_speed = 19531,
+ },
{
- name: "at-a2150s",
- clock: {62500, 50000, 41667, 0},
- num_clocks:3,
- ai_speed:41667,
- },
+ .name = "at-a2150s",
+ .clock = {62500, 50000, 41667, 0},
+ .num_clocks = 3,
+ .ai_speed = 41667,
+ },
};
/*
* Useful for shorthand access to the particular board structure
*/
-#define thisboard ((const a2150_board *)dev->board_ptr)
+#define thisboard ((const struct a2150_board *)dev->board_ptr)
+
+struct a2150_private {
-typedef struct {
volatile unsigned int count; /* number of data points left to be taken */
- unsigned int dma; // dma channel
- s16 *dma_buffer; // dma buffer
- unsigned int dma_transfer_size; // size in bytes of dma transfers
- int irq_dma_bits; // irq/dma register bits
- int config_bits; // config register bits
-} a2150_private;
+ unsigned int dma; /* dma channel */
+ s16 *dma_buffer; /* dma buffer */
+ unsigned int dma_transfer_size; /* size in bytes of dma transfers */
+ int irq_dma_bits; /* irq/dma register bits */
+ int config_bits; /* config register bits */
+};
-#define devpriv ((a2150_private *)dev->private)
+#define devpriv ((struct a2150_private *)dev->private)
-static int a2150_attach(struct comedi_device * dev, comedi_devconfig * it);
-static int a2150_detach(struct comedi_device * dev);
-static int a2150_cancel(struct comedi_device * dev, struct comedi_subdevice * s);
+static int a2150_attach(struct comedi_device *dev, struct comedi_devconfig *it);
+static int a2150_detach(struct comedi_device *dev);
+static int a2150_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
static struct comedi_driver driver_a2150 = {
- driver_name:"ni_at_a2150",
- module:THIS_MODULE,
- attach:a2150_attach,
- detach:a2150_detach,
+ .driver_name = "ni_at_a2150",
+ .module = THIS_MODULE,
+ .attach = a2150_attach,
+ .detach = a2150_detach,
};
-static irqreturn_t a2150_interrupt(int irq, void *d PT_REGS_ARG);
-static int a2150_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s,
- struct comedi_cmd * cmd);
-static int a2150_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s);
-static int a2150_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
- comedi_insn * insn, unsigned int * data);
-static int a2150_get_timing(struct comedi_device * dev, unsigned int *period,
- int flags);
-static int a2150_probe(struct comedi_device * dev);
-static int a2150_set_chanlist(struct comedi_device * dev, unsigned int start_channel,
- unsigned int num_channels);
+static irqreturn_t a2150_interrupt(int irq, void *d);
+static int a2150_ai_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_cmd *cmd);
+static int a2150_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s);
+static int a2150_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data);
+static int a2150_get_timing(struct comedi_device *dev, unsigned int *period,
+ int flags);
+static int a2150_probe(struct comedi_device *dev);
+static int a2150_set_chanlist(struct comedi_device *dev,
+ unsigned int start_channel,
+ unsigned int num_channels);
/*
* A convenient macro that defines init_module() and cleanup_module(),
* as necessary.
#ifdef A2150_DEBUG
-static void ni_dump_regs(struct comedi_device * dev)
+static void ni_dump_regs(struct comedi_device *dev)
{
- rt_printk("config bits 0x%x\n", devpriv->config_bits);
- rt_printk("irq dma bits 0x%x\n", devpriv->irq_dma_bits);
- rt_printk("status bits 0x%x\n", inw(dev->iobase + STATUS_REG));
+ printk("config bits 0x%x\n", devpriv->config_bits);
+ printk("irq dma bits 0x%x\n", devpriv->irq_dma_bits);
+ printk("status bits 0x%x\n", inw(dev->iobase + STATUS_REG));
}
#endif
/* interrupt service routine */
-static irqreturn_t a2150_interrupt(int irq, void *d PT_REGS_ARG)
+static irqreturn_t a2150_interrupt(int irq, void *d)
{
int i;
int status;
comedi_error(dev, "premature interrupt");
return IRQ_HANDLED;
}
- // initialize async here to make sure s is not NULL
+ /* initialize async here to make sure s is not NULL */
async = s->async;
async->events = 0;
cmd = &async->cmd;
* count and address get set correctly */
clear_dma_ff(devpriv->dma);
- // 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
if (devpriv->count < num_points && 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 (cmd->stop_src == TRIG_NONE) {
leftover = devpriv->dma_transfer_size / sample_size;
for (i = 0; i < num_points; i++) {
/* write data point to comedi buffer */
dpnt = devpriv->dma_buffer[i];
- // convert from 2's complement to unsigned coding
+ /* convert from 2's complement to unsigned coding */
dpnt ^= 0x8000;
cfc_write_to_buffer(s, dpnt);
if (cmd->stop_src == TRIG_COUNT) {
}
}
}
- // re-enable dma
+ /* re-enable dma */
if (leftover) {
set_dma_addr(devpriv->dma, virt_to_bus(devpriv->dma_buffer));
set_dma_count(devpriv->dma, leftover * sample_size);
return IRQ_HANDLED;
}
-// probes board type, returns offset
-static int a2150_probe(struct comedi_device * dev)
+/* probes board type, returns offset */
+static int a2150_probe(struct comedi_device *dev)
{
int status = inw(dev->iobase + STATUS_REG);
return ID_BITS(status);
}
-static int a2150_attach(struct comedi_device * dev, comedi_devconfig * it)
+static int a2150_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
struct comedi_subdevice *s;
unsigned long iobase = it->options[0];
int i;
printk("comedi%d: %s: io 0x%lx", dev->minor, driver_a2150.driver_name,
- iobase);
+ iobase);
if (irq) {
printk(", irq %u", irq);
} else {
printk("\n");
/* allocate and initialize dev->private */
- if (alloc_private(dev, sizeof(a2150_private)) < 0)
+ if (alloc_private(dev, sizeof(struct a2150_private)) < 0)
return -ENOMEM;
if (iobase == 0) {
/* grab our IRQ */
if (irq) {
- // check that irq is supported
+ /* check that irq is supported */
if (irq < 3 || irq == 8 || irq == 13 || irq > 15) {
printk(" invalid irq line %u\n", irq);
return -EINVAL;
}
- if (comedi_request_irq(irq, a2150_interrupt, 0,
+ if (request_irq(irq, a2150_interrupt, 0,
driver_a2150.driver_name, dev)) {
printk("unable to allocate irq %u\n", irq);
return -EINVAL;
devpriv->irq_dma_bits |= IRQ_LVL_BITS(irq);
dev->irq = irq;
}
- // initialize dma
+ /* initialize dma */
if (dma) {
if (dma == 4 || dma > 7) {
printk(" invalid dma channel %u\n", dma);
}
devpriv->dma = dma;
devpriv->dma_buffer =
- kmalloc(A2150_DMA_BUFFER_SIZE, GFP_KERNEL | GFP_DMA);
+ kmalloc(A2150_DMA_BUFFER_SIZE, GFP_KERNEL | GFP_DMA);
if (devpriv->dma_buffer == NULL)
return -ENOMEM;
* prevent hardware count from stopping aquisition */
outw(HW_COUNT_DISABLE, dev->iobase + I8253_MODE_REG);
- // set card's irq and dma levels
+ /* set card's irq and dma levels */
outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG);
- // reset and sync adc clock circuitry
+ /* reset and sync adc clock circuitry */
outw_p(DPD_BIT | APD_BIT, dev->iobase + CONFIG_REG);
outw_p(DPD_BIT, dev->iobase + CONFIG_REG);
- // initialize configuration register
+ /* initialize configuration register */
devpriv->config_bits = 0;
outw(devpriv->config_bits, dev->iobase + CONFIG_REG);
- // wait until offset calibration is done, then enable analog inputs
+ /* wait until offset calibration is done, then enable analog inputs */
for (i = 0; i < timeout; i++) {
if ((DCAL_BIT & inw(dev->iobase + STATUS_REG)) == 0)
break;
- comedi_udelay(1000);
+ udelay(1000);
}
if (i == timeout) {
- printk(" timed out waiting for offset calibration to complete\n");
+ printk
+ (" timed out waiting for offset calibration to complete\n");
return -ETIME;
}
devpriv->config_bits |= ENABLE0_BIT | ENABLE1_BIT;
return 0;
};
-static int a2150_detach(struct comedi_device * dev)
+static int a2150_detach(struct comedi_device *dev)
{
printk("comedi%d: %s: remove\n", dev->minor, driver_a2150.driver_name);
/* only free stuff if it has been allocated by _attach */
if (dev->iobase) {
- // put board in power-down mode
+ /* put board in power-down mode */
outw(APD_BIT | DPD_BIT, dev->iobase + CONFIG_REG);
release_region(dev->iobase, A2150_SIZE);
}
if (dev->irq)
- comedi_free_irq(dev->irq, dev);
+ free_irq(dev->irq, dev);
if (devpriv) {
if (devpriv->dma)
free_dma(devpriv->dma);
return 0;
};
-static int a2150_cancel(struct comedi_device * dev, struct comedi_subdevice * s)
+static int a2150_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
{
- // disable dma on card
+ /* disable dma on card */
devpriv->irq_dma_bits &= ~DMA_INTR_EN_BIT & ~DMA_EN_BIT;
outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG);
- // disable computer's dma
+ /* disable computer's dma */
disable_dma(devpriv->dma);
- // clear fifo and reset triggering circuitry
+ /* clear fifo and reset triggering circuitry */
outw(0, dev->iobase + FIFO_RESET_REG);
return 0;
}
-static int a2150_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s,
- struct comedi_cmd * cmd)
+static int a2150_ai_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_cmd *cmd)
{
int err = 0;
int tmp;
if (err)
return 4;
- // check channel/gain list against card's limitations
+ /* check channel/gain list against card's limitations */
if (cmd->chanlist) {
startChan = CR_CHAN(cmd->chanlist[0]);
for (i = 1; i < cmd->chanlist_len; i++) {
if (CR_CHAN(cmd->chanlist[i]) != (startChan + i)) {
comedi_error(dev,
- "entries in chanlist must be consecutive channels, counting upwards\n");
+ "entries in chanlist must be consecutive channels, counting upwards\n");
err++;
}
}
if (cmd->chanlist_len == 2 && CR_CHAN(cmd->chanlist[0]) == 1) {
comedi_error(dev,
- "length 2 chanlist must be channels 0,1 or channels 2,3");
+ "length 2 chanlist must be channels 0,1 or channels 2,3");
err++;
}
if (cmd->chanlist_len == 3) {
comedi_error(dev,
- "chanlist must have 1,2 or 4 channels");
+ "chanlist must have 1,2 or 4 channels");
err++;
}
if (CR_AREF(cmd->chanlist[0]) != CR_AREF(cmd->chanlist[1]) ||
- CR_AREF(cmd->chanlist[2]) != CR_AREF(cmd->chanlist[3]))
- {
+ CR_AREF(cmd->chanlist[2]) != CR_AREF(cmd->chanlist[3])) {
comedi_error(dev,
- "channels 0/1 and 2/3 must have the same analog reference");
+ "channels 0/1 and 2/3 must have the same analog reference");
err++;
}
}
return 0;
}
-static int a2150_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
+static int a2150_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
{
struct comedi_async *async = s->async;
struct comedi_cmd *cmd = &async->cmd;
if (!dev->irq || !devpriv->dma) {
comedi_error(dev,
- " irq and dma required, cannot do hardware conversions");
+ " irq and dma required, cannot do hardware conversions");
return -1;
}
if (cmd->flags & TRIG_RT) {
comedi_error(dev,
- " dma incompatible with hard real-time interrupt (TRIG_RT), aborting");
+ " dma incompatible with hard real-time interrupt (TRIG_RT), aborting");
return -1;
}
- // clear fifo and reset triggering circuitry
+ /* clear fifo and reset triggering circuitry */
outw(0, dev->iobase + FIFO_RESET_REG);
/* setup chanlist */
if (a2150_set_chanlist(dev, CR_CHAN(cmd->chanlist[0]),
- cmd->chanlist_len) < 0)
+ cmd->chanlist_len) < 0)
return -1;
- // setup ac/dc coupling
+ /* setup ac/dc coupling */
if (CR_AREF(cmd->chanlist[0]) == AREF_OTHER)
devpriv->config_bits |= AC0_BIT;
else
else
devpriv->config_bits &= ~AC1_BIT;
- // setup timing
+ /* setup timing */
a2150_get_timing(dev, &cmd->scan_begin_arg, cmd->flags);
- // send timing, channel, config bits
+ /* send timing, channel, config bits */
outw(devpriv->config_bits, dev->iobase + CONFIG_REG);
- // initialize number of samples remaining
+ /* initialize number of samples remaining */
devpriv->count = cmd->stop_arg * cmd->chanlist_len;
- // enable computer's dma
+ /* enable computer's dma */
lock_flags = claim_dma_lock();
disable_dma(devpriv->dma);
/* clear flip-flop to make sure 2-byte registers for
* count and address get set correctly */
clear_dma_ff(devpriv->dma);
set_dma_addr(devpriv->dma, virt_to_bus(devpriv->dma_buffer));
- // set size of transfer to fill in 1/3 second
+ /* set size of transfer to fill in 1/3 second */
#define ONE_THIRD_SECOND 333333333
devpriv->dma_transfer_size =
- sizeof(devpriv->dma_buffer[0]) * cmd->chanlist_len *
- ONE_THIRD_SECOND / cmd->scan_begin_arg;
+ sizeof(devpriv->dma_buffer[0]) * cmd->chanlist_len *
+ ONE_THIRD_SECOND / cmd->scan_begin_arg;
if (devpriv->dma_transfer_size > A2150_DMA_BUFFER_SIZE)
devpriv->dma_transfer_size = A2150_DMA_BUFFER_SIZE;
if (devpriv->dma_transfer_size < sizeof(devpriv->dma_buffer[0]))
devpriv->dma_transfer_size = sizeof(devpriv->dma_buffer[0]);
devpriv->dma_transfer_size -=
- devpriv->dma_transfer_size % sizeof(devpriv->dma_buffer[0]);
+ devpriv->dma_transfer_size % sizeof(devpriv->dma_buffer[0]);
set_dma_count(devpriv->dma, devpriv->dma_transfer_size);
enable_dma(devpriv->dma);
release_dma_lock(lock_flags);
* one spurious interrupt that has been happening */
outw(0x00, dev->iobase + DMA_TC_CLEAR_REG);
- // enable dma on card
+ /* enable dma on card */
devpriv->irq_dma_bits |= DMA_INTR_EN_BIT | DMA_EN_BIT;
outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG);
- // may need to wait 72 sampling periods if timing was changed
+ /* may need to wait 72 sampling periods if timing was changed */
i8254_load(dev->iobase + I8253_BASE_REG, 0, 2, 72, 0);
- // setup start triggering
+ /* setup start triggering */
trigger_bits = 0;
- // decide if we need to wait 72 periods for valid data
+ /* decide if we need to wait 72 periods for valid data */
if (cmd->start_src == TRIG_NOW &&
- (old_config_bits & CLOCK_MASK) !=
- (devpriv->config_bits & CLOCK_MASK)) {
- // set trigger source to delay trigger
+ (old_config_bits & CLOCK_MASK) !=
+ (devpriv->config_bits & CLOCK_MASK)) {
+ /* set trigger source to delay trigger */
trigger_bits |= DELAY_TRIGGER_BITS;
} else {
- // otherwise no delay
+ /* otherwise no delay */
trigger_bits |= POST_TRIGGER_BITS;
}
- // enable external hardware trigger
+ /* enable external hardware trigger */
if (cmd->start_src == TRIG_EXT) {
trigger_bits |= HW_TRIG_EN;
} else if (cmd->start_src == TRIG_OTHER) {
- // XXX add support for level/slope start trigger using TRIG_OTHER
+ /* XXX add support for level/slope start trigger using TRIG_OTHER */
comedi_error(dev, "you shouldn't see this?");
}
- // send trigger config bits
+ /* send trigger config bits */
outw(trigger_bits, dev->iobase + TRIGGER_REG);
- // start aquisition for soft trigger
+ /* start aquisition for soft trigger */
if (cmd->start_src == TRIG_NOW) {
outw(0, dev->iobase + FIFO_START_REG);
}
return 0;
}
-static int a2150_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
- comedi_insn * insn, unsigned int * data)
+static int a2150_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
{
unsigned int i, n;
static const int timeout = 100000;
static const int filter_delay = 36;
- // clear fifo and reset triggering circuitry
+ /* clear fifo and reset triggering circuitry */
outw(0, dev->iobase + FIFO_RESET_REG);
/* setup chanlist */
if (a2150_set_chanlist(dev, CR_CHAN(insn->chanspec), 1) < 0)
return -1;
- // set dc coupling
+ /* set dc coupling */
devpriv->config_bits &= ~AC0_BIT;
devpriv->config_bits &= ~AC1_BIT;
- // send timing, channel, config bits
+ /* send timing, channel, config bits */
outw(devpriv->config_bits, dev->iobase + CONFIG_REG);
- // disable dma on card
+ /* disable dma on card */
devpriv->irq_dma_bits &= ~DMA_INTR_EN_BIT & ~DMA_EN_BIT;
outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG);
- // setup start triggering
+ /* setup start triggering */
outw(0, dev->iobase + TRIGGER_REG);
- // start aquisition for soft trigger
+ /* start aquisition for soft trigger */
outw(0, dev->iobase + FIFO_START_REG);
/* there is a 35.6 sample delay for data to get through the antialias filter */
for (i = 0; i < timeout; i++) {
if (inw(dev->iobase + STATUS_REG) & FNE_BIT)
break;
- comedi_udelay(1);
+ udelay(1);
}
if (i == timeout) {
comedi_error(dev, "timeout");
inw(dev->iobase + FIFO_DATA_REG);
}
- // read data
+ /* read data */
for (n = 0; n < insn->n; n++) {
for (i = 0; i < timeout; i++) {
if (inw(dev->iobase + STATUS_REG) & FNE_BIT)
break;
- comedi_udelay(1);
+ udelay(1);
}
if (i == timeout) {
comedi_error(dev, "timeout");
#endif
data[n] = inw(dev->iobase + FIFO_DATA_REG);
#ifdef A2150_DEBUG
- rt_printk(" data is %i\n", data[n]);
+ printk(" data is %i\n", data[n]);
#endif
data[n] ^= 0x8000;
}
- // clear fifo and reset triggering circuitry
+ /* clear fifo and reset triggering circuitry */
outw(0, dev->iobase + FIFO_RESET_REG);
return n;
/* sets bits in devpriv->clock_bits to nearest approximation of requested period,
* adjusts requested period to actual timing. */
-static int a2150_get_timing(struct comedi_device * dev, unsigned int *period,
- int flags)
+static int a2150_get_timing(struct comedi_device *dev, unsigned int *period,
+ int flags)
{
int lub, glb, temp;
int lub_divisor_shift, lub_index, glb_divisor_shift, glb_index;
int i, j;
- // initialize greatest lower and least upper bounds
+ /* initialize greatest lower and least upper bounds */
lub_divisor_shift = 3;
lub_index = 0;
lub = thisboard->clock[lub_index] * (1 << lub_divisor_shift);
glb_index = thisboard->num_clocks - 1;
glb = thisboard->clock[glb_index] * (1 << glb_divisor_shift);
- // make sure period is in available range
+ /* make sure period is in available range */
if (*period < glb)
*period = glb;
if (*period > lub)
*period = lub;
- // we can multiply period by 1, 2, 4, or 8, using (1 << i)
+ /* we can multiply period by 1, 2, 4, or 8, using (1 << i) */
for (i = 0; i < 4; i++) {
- // there are a maximum of 4 master clocks
+ /* there are a maximum of 4 master clocks */
for (j = 0; j < thisboard->num_clocks; j++) {
- // temp is the period in nanosec we are evaluating
+ /* temp is the period in nanosec we are evaluating */
temp = thisboard->clock[j] * (1 << i);
- // if it is the best match yet
+ /* if it is the best match yet */
if (temp < lub && temp >= *period) {
lub_divisor_shift = i;
lub_index = j;
switch (flags) {
case TRIG_ROUND_NEAREST:
default:
- // if least upper bound is better approximation
+ /* if least upper bound is better approximation */
if (lub - *period < *period - glb) {
*period = lub;
} else {
break;
}
- // set clock bits for config register appropriately
+ /* set clock bits for config register appropriately */
devpriv->config_bits &= ~CLOCK_MASK;
if (*period == lub) {
devpriv->config_bits |=
- CLOCK_SELECT_BITS(lub_index) |
- CLOCK_DIVISOR_BITS(lub_divisor_shift);
+ CLOCK_SELECT_BITS(lub_index) |
+ CLOCK_DIVISOR_BITS(lub_divisor_shift);
} else {
devpriv->config_bits |=
- CLOCK_SELECT_BITS(glb_index) |
- CLOCK_DIVISOR_BITS(glb_divisor_shift);
+ CLOCK_SELECT_BITS(glb_index) |
+ CLOCK_DIVISOR_BITS(glb_divisor_shift);
}
return 0;
}
-static int a2150_set_chanlist(struct comedi_device * dev, unsigned int start_channel,
- unsigned int num_channels)
+static int a2150_set_chanlist(struct comedi_device *dev,
+ unsigned int start_channel,
+ unsigned int num_channels)
{
if (start_channel + num_channels > 4)
return -1;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff