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path: root/drivers/staging/comedi/drivers/s526.c
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Diffstat (limited to 'drivers/staging/comedi/drivers/s526.c')
-rw-r--r--drivers/staging/comedi/drivers/s526.c304
1 files changed, 166 insertions, 138 deletions
diff --git a/drivers/staging/comedi/drivers/s526.c b/drivers/staging/comedi/drivers/s526.c
index d9509d7a3283..07c21e686f27 100644
--- a/drivers/staging/comedi/drivers/s526.c
+++ b/drivers/staging/comedi/drivers/s526.c
@@ -43,6 +43,7 @@ comedi_config /dev/comedi0 s526 0x2C0,0x3
#include "../comedidev.h"
#include <linux/ioport.h>
+#include <asm/byteorder.h>
#define S526_SIZE 64
@@ -113,6 +114,7 @@ static const int s526_ports[] = {
};
struct counter_mode_register_t {
+#if defined (__LITTLE_ENDIAN_BITFIELD)
unsigned short coutSource:1;
unsigned short coutPolarity:1;
unsigned short autoLoadResetRcap:3;
@@ -124,12 +126,27 @@ struct counter_mode_register_t {
unsigned short outputRegLatchCtrl:1;
unsigned short preloadRegSel:1;
unsigned short reserved:1;
+ #elif defined(__BIG_ENDIAN_BITFIELD)
+ unsigned short reserved:1;
+ unsigned short preloadRegSel:1;
+ unsigned short outputRegLatchCtrl:1;
+ unsigned short countDirCtrl:1;
+ unsigned short countDir:1;
+ unsigned short clockSource:2;
+ unsigned short ctEnableCtrl:2;
+ unsigned short hwCtEnableSource:2;
+ unsigned short autoLoadResetRcap:3;
+ unsigned short coutPolarity:1;
+ unsigned short coutSource:1;
+#else
+#error Unknown bit field order
+#endif
};
-union {
+union cmReg {
struct counter_mode_register_t reg;
unsigned short value;
-} cmReg;
+};
#define MAX_GPCT_CONFIG_DATA 6
@@ -169,15 +186,15 @@ struct s526_board {
static const struct 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,
- }
+ .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))
@@ -247,24 +264,30 @@ static struct comedi_driver driver_s526 = {
.num_names = ARRAY_SIZE(s526_boards),
};
-static int s526_gpct_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-static int s526_gpct_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-static int s526_gpct_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-static int s526_ai_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
+static int s526_gpct_rinsn(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_insn *insn,
+ unsigned int *data);
+static int s526_gpct_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data);
+static int s526_gpct_winsn(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_insn *insn,
+ unsigned int *data);
+static int s526_ai_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data);
static int s526_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
+ struct comedi_insn *insn, unsigned int *data);
static int s526_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
+ struct comedi_insn *insn, unsigned int *data);
static int s526_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-static int s526_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-static int s526_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
+ struct comedi_insn *insn, unsigned int *data);
+static int s526_dio_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data);
+static int s526_dio_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data);
/*
* Attach is called by the Comedi core to configure the driver
@@ -279,6 +302,7 @@ static int s526_attach(struct comedi_device *dev, struct comedi_devconfig *it)
int i, n;
/* short value; */
/* int subdev_channel = 0; */
+ union cmReg cmReg;
printk("comedi%d: s526: ", dev->minor);
@@ -369,7 +393,7 @@ static int s526_attach(struct comedi_device *dev, struct comedi_devconfig *it)
if (thisboard->have_dio) {
s->type = COMEDI_SUBD_DIO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
- s->n_chan = 2;
+ s->n_chan = 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = s526_dio_insn_bits;
@@ -424,16 +448,16 @@ static int s526_attach(struct comedi_device *dev, struct comedi_devconfig *it)
n = 0;
printk("Mode reg=0x%04x, 0x%04lx\n", cmReg.value, ADDR_CHAN_REG(REG_C0M,
- n));
+ 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 */
+ /* Load the pre-load register high word */
/* value = (short) (0x55); */
/* outw(value, ADDR_CHAN_REG(REG_C0H, n)); */
- /* Load the pre-laod register low word */
+ /* Load the pre-load register low word */
/* value = (short)(0xaa55); */
/* outw(value, ADDR_CHAN_REG(REG_C0L, n)); */
@@ -455,7 +479,7 @@ static int s526_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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])));
+ inw(ADDR_REG(s526_ports[i])));
}
return 1;
}
@@ -478,8 +502,9 @@ static int s526_detach(struct comedi_device *dev)
return 0;
}
-static int s526_gpct_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+static int s526_gpct_rinsn(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_insn *insn,
+ unsigned int *data)
{
int i; /* counts the Data */
int counter_channel = CR_CHAN(insn->chanspec);
@@ -502,18 +527,20 @@ static int s526_gpct_rinsn(struct comedi_device *dev, struct comedi_subdevice *s
return i;
}
-static int s526_gpct_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+static int s526_gpct_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
{
int subdev_channel = CR_CHAN(insn->chanspec); /* Unpack chanspec */
int i;
short value;
+ union cmReg cmReg;
/* 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];
+ insn->data[i];
/* printk("data[%d]=%x\n", i, insn->data[i]); */
}
@@ -529,50 +556,39 @@ static int s526_gpct_insn_config(struct comedi_device *dev, struct comedi_subdev
*/
printk("s526: GPCT_INSN_CONFIG: Configuring Encoder\n");
devpriv->s526_gpct_config[subdev_channel].app =
- PositionMeasurement;
+ PositionMeasurement;
#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 = 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));
+ /* 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(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(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(0x0008, ADDR_CHAN_REG(REG_C0C, subdev_channel)); /* Reset RCAP (fires one-shot) */
+ 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) */
#endif
#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;
+ cmReg.value = insn->data[1] & 0xFFFF;
- /* Set Counter Mode Register */
/* printk("s526: Counter Mode register=%x\n", cmReg.value); */
outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
@@ -604,20 +620,20 @@ static int s526_gpct_insn_config(struct comedi_device *dev, struct comedi_subdev
cmReg.reg.autoLoadResetRcap = 4; /* Auto load with INDEX^ */
/* Set Counter Mode Register */
- cmReg.value = (short) (insn->data[1] & 0xFFFF);
+ cmReg.value = (short)(insn->data[1] & 0xFFFF);
outw(cmReg.value, ADDR_CHAN_REG(REG_C0M, subdev_channel));
- /* Load the pre-laod register high word */
- value = (short) ((insn->data[2] >> 16) & 0xFFFF);
+ /* Load the pre-load register high word */
+ value = (short)((insn->data[2] >> 16) & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
- /* Load the pre-laod register low word */
- value = (short) (insn->data[2] & 0xFFFF);
+ /* Load the pre-load register low word */
+ value = (short)(insn->data[2] & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
/* Write the Counter Control Register */
if (insn->data[3] != 0) {
- value = (short) (insn->data[3] & 0xFFFF);
+ value = (short)(insn->data[3] & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0C, subdev_channel));
}
/* Reset the counter if it is software preload */
@@ -638,37 +654,37 @@ static int s526_gpct_insn_config(struct comedi_device *dev, struct comedi_subdev
*/
printk("s526: GPCT_INSN_CONFIG: Configuring SPG\n");
devpriv->s526_gpct_config[subdev_channel].app =
- SinglePulseGeneration;
+ SinglePulseGeneration;
/* Set Counter Mode Register */
- cmReg.value = (short) (insn->data[1] & 0xFFFF);
+ cmReg.value = (short)(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 = (short) ((insn->data[2] >> 16) & 0xFFFF);
+ /* Load the pre-load register 0 high word */
+ value = (short)((insn->data[2] >> 16) & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
- /* Load the pre-laod register 0 low word */
- value = (short) (insn->data[2] & 0xFFFF);
+ /* Load the pre-load register 0 low word */
+ value = (short)(insn->data[2] & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
/* Set Counter Mode Register */
- cmReg.value = (short) (insn->data[1] & 0xFFFF);
+ cmReg.value = (short)(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 = (short) ((insn->data[3] >> 16) & 0xFFFF);
+ /* Load the pre-load register 1 high word */
+ value = (short)((insn->data[3] >> 16) & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
- /* Load the pre-laod register 1 low word */
- value = (short) (insn->data[3] & 0xFFFF);
+ /* Load the pre-load register 1 low word */
+ value = (short)(insn->data[3] & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
/* Write the Counter Control Register */
- if (insn->data[3] != 0) {
- value = (short) (insn->data[3] & 0xFFFF);
+ if (insn->data[4] != 0) {
+ value = (short)(insn->data[4] & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0C, subdev_channel));
}
break;
@@ -683,37 +699,37 @@ static int s526_gpct_insn_config(struct comedi_device *dev, struct comedi_subdev
*/
printk("s526: GPCT_INSN_CONFIG: Configuring PTG\n");
devpriv->s526_gpct_config[subdev_channel].app =
- PulseTrainGeneration;
+ PulseTrainGeneration;
/* Set Counter Mode Register */
- cmReg.value = (short) (insn->data[1] & 0xFFFF);
+ cmReg.value = (short)(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 = (short) ((insn->data[2] >> 16) & 0xFFFF);
+ /* Load the pre-load register 0 high word */
+ value = (short)((insn->data[2] >> 16) & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
- /* Load the pre-laod register 0 low word */
- value = (short) (insn->data[2] & 0xFFFF);
+ /* Load the pre-load register 0 low word */
+ value = (short)(insn->data[2] & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
/* Set Counter Mode Register */
- cmReg.value = (short) (insn->data[1] & 0xFFFF);
+ cmReg.value = (short)(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 = (short) ((insn->data[3] >> 16) & 0xFFFF);
+ /* Load the pre-load register 1 high word */
+ value = (short)((insn->data[3] >> 16) & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
- /* Load the pre-laod register 1 low word */
- value = (short) (insn->data[3] & 0xFFFF);
+ /* Load the pre-load register 1 low word */
+ value = (short)(insn->data[3] & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0L, subdev_channel));
/* Write the Counter Control Register */
- if (insn->data[3] != 0) {
- value = (short) (insn->data[3] & 0xFFFF);
+ if (insn->data[4] != 0) {
+ value = (short)(insn->data[4] & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0C, subdev_channel));
}
break;
@@ -727,11 +743,13 @@ static int s526_gpct_insn_config(struct comedi_device *dev, struct comedi_subdev
return insn->n;
}
-static int s526_gpct_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+static int s526_gpct_winsn(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_insn *insn,
+ unsigned int *data)
{
int subdev_channel = CR_CHAN(insn->chanspec); /* Unpack chanspec */
short value;
+ union cmReg cmReg;
printk("s526: GPCT_INSN_WRITE on channel %d\n", subdev_channel);
cmReg.value = inw(ADDR_CHAN_REG(REG_C0M, subdev_channel));
@@ -741,14 +759,14 @@ static int s526_gpct_winsn(struct comedi_device *dev, struct comedi_subdevice *s
case PositionMeasurement:
printk("S526: INSN_WRITE: PM\n");
outw(0xFFFF & ((*data) >> 16), ADDR_CHAN_REG(REG_C0H,
- subdev_channel));
+ 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));
+ subdev_channel));
outw(0xFFFF & (*data), ADDR_CHAN_REG(REG_C0L, subdev_channel));
break;
@@ -762,22 +780,24 @@ static int s526_gpct_winsn(struct comedi_device *dev, struct comedi_subdevice *s
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];
+ insn->data[0];
(devpriv->s526_gpct_config[subdev_channel]).data[1] =
- insn->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");
+ printk("s526: INSN_WRITE: PTG: Problem with Pulse params -> %d %d\n",
+ insn->data[0], insn->data[1]);
return -EINVAL;
}
- value = (short) ((*data >> 16) & 0xFFFF);
+ value = (short)((*data >> 16) & 0xFFFF);
outw(value, ADDR_CHAN_REG(REG_C0H, subdev_channel));
- value = (short) (*data & 0xFFFF);
+ value = (short)(*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);
+ printk
+ ("s526: INSN_WRITE: Functionality %d not implemented yet\n",
+ devpriv->s526_gpct_config[subdev_channel].app);
return -EINVAL;
break;
}
@@ -786,8 +806,9 @@ static int s526_gpct_winsn(struct comedi_device *dev, struct comedi_subdevice *s
}
#define ISR_ADC_DONE 0x4
-static int s526_ai_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+static int s526_ai_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
{
int result = -EINVAL;
@@ -820,7 +841,7 @@ static int s526_ai_insn_config(struct comedi_device *dev, struct comedi_subdevic
* mode.
*/
static int s526_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+ struct comedi_insn *insn, unsigned int *data)
{
int n, i;
int chan = CR_CHAN(insn->chanspec);
@@ -831,7 +852,7 @@ static int s526_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
/* 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;
+ ((1 << 5) << chan) | (chan << 1) | 0x0001;
/* convert n samples */
for (n = 0; n < insn->n; n++) {
@@ -853,7 +874,7 @@ static int s526_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
/* printk() should be used instead of printk()
* whenever the code can be called from real-time. */
printk("s526: ADC(0x%04x) timeout\n",
- inw(ADDR_REG(REG_ISR)));
+ inw(ADDR_REG(REG_ISR)));
return -ETIMEDOUT;
}
@@ -870,7 +891,7 @@ static int s526_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
}
static int s526_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+ struct comedi_insn *insn, unsigned int *data)
{
int i;
int chan = CR_CHAN(insn->chanspec);
@@ -899,7 +920,7 @@ static int s526_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
/* 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(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+ struct comedi_insn *insn, unsigned int *data)
{
int i;
int chan = CR_CHAN(insn->chanspec);
@@ -915,8 +936,9 @@ static int s526_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
* 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(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+static int s526_dio_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
{
if (insn->n != 2)
return -EINVAL;
@@ -935,37 +957,43 @@ static int s526_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice
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; */
+ /* data[1]=s->state & 0xFF; */
return 2;
}
-static int s526_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+static int s526_dio_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
{
int chan = CR_CHAN(insn->chanspec);
- short value;
+ int group, mask;
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);
+ group = chan >> 2;
+ mask = 0xF << (group << 2);
+ switch (data[0]) {
+ case INSN_CONFIG_DIO_OUTPUT:
+ s->state |= 1 << (group + 10); // bit 10/11 set the group 1/2's mode
+ s->io_bits |= mask;
+ break;
+ case INSN_CONFIG_DIO_INPUT:
+ s->state &= ~(1 << (group + 10));// 1 is output, 0 is input.
+ s->io_bits &= ~mask;
+ break;
+ case INSN_CONFIG_DIO_QUERY:
+ data[1] = (s->io_bits & mask) ? COMEDI_OUTPUT : COMEDI_INPUT;
+ return insn->n;
+ default:
+ return -EINVAL;
}
- outw(value, ADDR_REG(REG_DIO));
+ outw(s->state, ADDR_REG(REG_DIO));
return 1;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.