Configuration Options:
[0] - I/O base address
[1] - convertion rate
- Convertion rate RMS noise Effective Number Of Bits
- 0 3.52kHz 23uV 17
- 1 1.76kHz 3.5uV 20
- 2 880Hz 2uV 21.3
- 3 440Hz 1.4uV 21.8
- 4 220Hz 1uV 22.4
- 5 110Hz 750uV 22.9
- 6 55Hz 510nV 23.4
- 7 27.5Hz 375nV 24
- 8 13.75Hz 250nV 24.4
- 9 6.875Hz 200nV 24.6
- [2] - voltage range
- 0 -1.01V .. +1.01V
- 1 -10.1V .. +10.1V
+ Convertion rate RMS noise Effective Number Of Bits
+ 0 3.52kHz 23uV 17
+ 1 1.76kHz 3.5uV 20
+ 2 880Hz 2uV 21.3
+ 3 440Hz 1.4uV 21.8
+ 4 220Hz 1uV 22.4
+ 5 110Hz 750uV 22.9
+ 6 55Hz 510nV 23.4
+ 7 27.5Hz 375nV 24
+ 8 13.75Hz 250nV 24.4
+ 9 6.875Hz 200nV 24.6
+ [2] - voltage range
+ 0 -1.01V .. +1.01V
+ 1 -10.1V .. +10.1V
*/
#include "../comedidev.h"
#include <linux/ioport.h>
#include <linux/delay.h>
-// Consecutive I/O port addresses
+/* Consecutive I/O port addresses */
#define MPC624_SIZE 16
-// Offsets of different ports
-#define MPC624_MASTER_CONTROL 0 // not used
-#define MPC624_GNMUXCH 1 // Gain, Mux, Channel of ADC
-#define MPC624_ADC 2 // read/write to/from ADC
-#define MPC624_EE 3 // read/write to/from serial EEPROM via I2C
-#define MPC624_LEDS 4 // write to LEDs
-#define MPC624_DIO 5 // read/write to/from digital I/O ports
-#define MPC624_IRQ_MASK 6 // IRQ masking enable/disable
+/* Offsets of different ports */
+#define MPC624_MASTER_CONTROL 0 /* not used */
+#define MPC624_GNMUXCH 1 /* Gain, Mux, Channel of ADC */
+#define MPC624_ADC 2 /* read/write to/from ADC */
+#define MPC624_EE 3 /* read/write to/from serial EEPROM via I2C */
+#define MPC624_LEDS 4 /* write to LEDs */
+#define MPC624_DIO 5 /* read/write to/from digital I/O ports */
+#define MPC624_IRQ_MASK 6 /* IRQ masking enable/disable */
-// Register bits' names
+/* Register bits' names */
#define MPC624_ADBUSY (1<<5)
#define MPC624_ADSDO (1<<4)
#define MPC624_ADFO (1<<3)
#define MPC624_ADSCK (1<<1)
#define MPC624_ADSDI (1<<0)
-// SDI Speed/Resolution Programming bits
+/* SDI Speed/Resolution Programming bits */
#define MPC624_OSR4 (1<<31)
#define MPC624_OSR3 (1<<30)
#define MPC624_OSR2 (1<<29)
#define MPC624_OSR1 (1<<28)
#define MPC624_OSR0 (1<<27)
-// 32-bit output value bits' names
+/* 32-bit output value bits' names */
#define MPC624_EOC_BIT (1<<31)
#define MPC624_DMY_BIT (1<<30)
#define MPC624_SGN_BIT (1<<29)
-// Convertion speeds
+/* Convertion speeds */
/* OSR4 OSR3 OSR2 OSR1 OSR0 Convertion rate RMS noise ENOB^
* X 0 0 0 1 3.52kHz 23uV 17
* X 0 0 1 0 1.76kHz 3.5uV 20
* ^ - Effective Number Of Bits
*/
-#define MPC624_SPEED_3_52_kHz (MPC624_OSR4 | MPC624_OSR0)
-#define MPC624_SPEED_1_76_kHz (MPC624_OSR4 | MPC624_OSR1 )
-#define MPC624_SPEED_880_Hz (MPC624_OSR4 | MPC624_OSR1 | MPC624_OSR0)
-#define MPC624_SPEED_440_Hz (MPC624_OSR4 | MPC624_OSR2 )
-#define MPC624_SPEED_220_Hz (MPC624_OSR4 | MPC624_OSR2 | MPC624_OSR0)
-#define MPC624_SPEED_110_Hz (MPC624_OSR4 | MPC624_OSR2 | MPC624_OSR1 )
-#define MPC624_SPEED_55_Hz (MPC624_OSR4 | MPC624_OSR2 | MPC624_OSR1 | MPC624_OSR0)
-#define MPC624_SPEED_27_5_Hz (MPC624_OSR4 | MPC624_OSR3 )
-#define MPC624_SPEED_13_75_Hz (MPC624_OSR4 | MPC624_OSR3 | MPC624_OSR0)
-#define MPC624_SPEED_6_875_Hz (MPC624_OSR4 | MPC624_OSR3 | MPC624_OSR2 | MPC624_OSR1 | MPC624_OSR0)
-//----------------------------------------------------------------------------
-typedef struct {
- unsigned long int ulConvertionRate; // set by mpc624_attach() from driver's parameters
-} skel_private;
-
-#define devpriv ((skel_private *)dev->private)
-//----------------------------------------------------------------------------
+#define MPC624_SPEED_3_52_kHz (MPC624_OSR4 | MPC624_OSR0)
+#define MPC624_SPEED_1_76_kHz (MPC624_OSR4 | MPC624_OSR1)
+#define MPC624_SPEED_880_Hz (MPC624_OSR4 | MPC624_OSR1 | MPC624_OSR0)
+#define MPC624_SPEED_440_Hz (MPC624_OSR4 | MPC624_OSR2)
+#define MPC624_SPEED_220_Hz (MPC624_OSR4 | MPC624_OSR2 | MPC624_OSR0)
+#define MPC624_SPEED_110_Hz (MPC624_OSR4 | MPC624_OSR2 | MPC624_OSR1)
+#define MPC624_SPEED_55_Hz \
+ (MPC624_OSR4 | MPC624_OSR2 | MPC624_OSR1 | MPC624_OSR0)
+#define MPC624_SPEED_27_5_Hz (MPC624_OSR4 | MPC624_OSR3)
+#define MPC624_SPEED_13_75_Hz (MPC624_OSR4 | MPC624_OSR3 | MPC624_OSR0)
+#define MPC624_SPEED_6_875_Hz \
+ (MPC624_OSR4 | MPC624_OSR3 | MPC624_OSR2 | MPC624_OSR1 | MPC624_OSR0)
+/* -------------------------------------------------------------------------- */
+struct skel_private {
+
+ /* set by mpc624_attach() from driver's parameters */
+ unsigned long int ulConvertionRate;
+};
+
+#define devpriv ((struct skel_private *)dev->private)
+/* -------------------------------------------------------------------------- */
static const struct comedi_lrange range_mpc624_bipolar1 = {
1,
{
-// BIP_RANGE(1.01) // this is correct,
- // but my MPC-624 actually seems to have a range of 2.02
- BIP_RANGE(2.02)
- }
+/* BIP_RANGE(1.01) this is correct, */
+ /* but my MPC-624 actually seems to have a range of 2.02 */
+ BIP_RANGE(2.02)
+ }
};
+
static const struct comedi_lrange range_mpc624_bipolar10 = {
1,
{
-// BIP_RANGE(10.1) // this is correct,
- // but my MPC-624 actually seems to have a range of 20.2
- BIP_RANGE(20.2)
- }
+/* BIP_RANGE(10.1) this is correct, */
+ /* but my MPC-624 actually seems to have a range of 20.2 */
+ BIP_RANGE(20.2)
+ }
};
-//----------------------------------------------------------------------------
-static int mpc624_attach(struct comedi_device * dev, comedi_devconfig * it);
-static int mpc624_detach(struct comedi_device * dev);
-//----------------------------------------------------------------------------
+/* -------------------------------------------------------------------------- */
+static int mpc624_attach(struct comedi_device *dev,
+ struct comedi_devconfig *it);
+static int mpc624_detach(struct comedi_device *dev);
+/* -------------------------------------------------------------------------- */
static struct comedi_driver driver_mpc624 = {
- driver_name:"mpc624",
- module:THIS_MODULE,
- attach:mpc624_attach,
- detach:mpc624_detach
+ .driver_name = "mpc624",
+ .module = THIS_MODULE,
+ .attach = mpc624_attach,
+ .detach = mpc624_detach
};
-//----------------------------------------------------------------------------
-static int mpc624_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
- comedi_insn * insn, unsigned int * data);
-//----------------------------------------------------------------------------
-static int mpc624_attach(struct comedi_device * dev, comedi_devconfig * it)
+/* -------------------------------------------------------------------------- */
+static int mpc624_ai_rinsn(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_insn *insn,
+ unsigned int *data);
+/* -------------------------------------------------------------------------- */
+static int mpc624_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
struct comedi_subdevice *s;
unsigned long iobase;
iobase = it->options[0];
- rt_printk("comedi%d: mpc624 [0x%04lx, ", dev->minor, iobase);
+ printk(KERN_INFO "comedi%d: mpc624 [0x%04lx, ", dev->minor, iobase);
if (request_region(iobase, MPC624_SIZE, "mpc624") == NULL) {
- rt_printk("I/O port(s) in use\n");
+ printk(KERN_ERR "I/O port(s) in use\n");
return -EIO;
}
dev->iobase = iobase;
dev->board_name = "mpc624";
- // Private structure initialization
- if (alloc_private(dev, sizeof(skel_private)) < 0)
+ /* Private structure initialization */
+ if (alloc_private(dev, sizeof(struct skel_private)) < 0)
return -ENOMEM;
switch (it->options[1]) {
case 0:
devpriv->ulConvertionRate = MPC624_SPEED_3_52_kHz;
- rt_printk("3.52 kHz, ");
+ printk(KERN_INFO "3.52 kHz, ");
break;
case 1:
devpriv->ulConvertionRate = MPC624_SPEED_1_76_kHz;
- rt_printk("1.76 kHz, ");
+ printk(KERN_INFO "1.76 kHz, ");
break;
case 2:
devpriv->ulConvertionRate = MPC624_SPEED_880_Hz;
- rt_printk("880 Hz, ");
+ printk(KERN_INFO "880 Hz, ");
break;
case 3:
devpriv->ulConvertionRate = MPC624_SPEED_440_Hz;
- rt_printk("440 Hz, ");
+ printk(KERN_INFO "440 Hz, ");
break;
case 4:
devpriv->ulConvertionRate = MPC624_SPEED_220_Hz;
- rt_printk("220 Hz, ");
+ printk(KERN_INFO "220 Hz, ");
break;
case 5:
devpriv->ulConvertionRate = MPC624_SPEED_110_Hz;
- rt_printk("110 Hz, ");
+ printk(KERN_INFO "110 Hz, ");
break;
case 6:
devpriv->ulConvertionRate = MPC624_SPEED_55_Hz;
- rt_printk("55 Hz, ");
+ printk(KERN_INFO "55 Hz, ");
break;
case 7:
devpriv->ulConvertionRate = MPC624_SPEED_27_5_Hz;
- rt_printk("27.5 Hz, ");
+ printk(KERN_INFO "27.5 Hz, ");
break;
case 8:
devpriv->ulConvertionRate = MPC624_SPEED_13_75_Hz;
- rt_printk("13.75 Hz, ");
+ printk(KERN_INFO "13.75 Hz, ");
break;
case 9:
devpriv->ulConvertionRate = MPC624_SPEED_6_875_Hz;
- rt_printk("6.875 Hz, ");
+ printk(KERN_INFO "6.875 Hz, ");
break;
default:
- rt_printk
- ("illegal convertion rate setting! Valid numbers are 0..9. Using 9 => 6.875 Hz, ");
+ printk
+ (KERN_ERR "illegal convertion rate setting!"
+ " Valid numbers are 0..9. Using 9 => 6.875 Hz, ");
devpriv->ulConvertionRate = MPC624_SPEED_3_52_kHz;
}
- // Subdevices structures
+ /* Subdevices structures */
if (alloc_subdevices(dev, 1) < 0)
return -ENOMEM;
switch (it->options[1]) {
default:
s->maxdata = 0x3FFFFFFF;
- rt_printk("30 bit, ");
+ printk(KERN_INFO "30 bit, ");
}
switch (it->options[1]) {
case 0:
s->range_table = &range_mpc624_bipolar1;
- rt_printk("1.01V]: ");
+ printk(KERN_INFO "1.01V]: ");
break;
default:
s->range_table = &range_mpc624_bipolar10;
- rt_printk("10.1V]: ");
+ printk(KERN_INFO "10.1V]: ");
}
s->len_chanlist = 1;
s->insn_read = mpc624_ai_rinsn;
- rt_printk("attached\n");
+ printk(KERN_INFO "attached\n");
return 1;
}
-static int mpc624_detach(struct comedi_device * dev)
+static int mpc624_detach(struct comedi_device *dev)
{
- rt_printk("comedi%d: mpc624: remove\n", dev->minor);
+ printk(KERN_INFO "comedi%d: mpc624: remove\n", dev->minor);
if (dev->iobase)
release_region(dev->iobase, MPC624_SIZE);
return 0;
}
-// Timeout 200ms
+/* Timeout 200ms */
#define TIMEOUT 200
-static int mpc624_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
- comedi_insn * insn, unsigned int * data)
+static int mpc624_ai_rinsn(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_insn *insn,
+ unsigned int *data)
{
int n, i;
unsigned long int data_in, data_out;
unsigned char ucPort;
- // WARNING: We always write 0 to GNSWA bit, so the channel range is +-/10.1Vdc
+ /*
+ * WARNING:
+ * We always write 0 to GNSWA bit, so the channel range is +-/10.1Vdc
+ */
outb(insn->chanspec, dev->iobase + MPC624_GNMUXCH);
-// rt_printk("Channel %d: \n", insn->chanspec);
+/* printk("Channel %d:\n", insn->chanspec); */
if (!insn->n) {
- rt_printk("MPC624: Warning, no data to aquire\n");
+ printk(KERN_INFO "MPC624: Warning, no data to acquire\n");
return 0;
}
for (n = 0; n < insn->n; n++) {
- // Trigger the convertion
+ /* Trigger the convertion */
outb(MPC624_ADSCK, dev->iobase + MPC624_ADC);
- comedi_udelay(1);
+ udelay(1);
outb(MPC624_ADCS | MPC624_ADSCK, dev->iobase + MPC624_ADC);
- comedi_udelay(1);
+ udelay(1);
outb(0, dev->iobase + MPC624_ADC);
- comedi_udelay(1);
+ udelay(1);
- // Wait for the convertion to end
+ /* Wait for the convertion to end */
for (i = 0; i < TIMEOUT; i++) {
ucPort = inb(dev->iobase + MPC624_ADC);
if (ucPort & MPC624_ADBUSY)
- comedi_udelay(1000);
+ udelay(1000);
else
break;
}
if (i == TIMEOUT) {
- rt_printk("MPC624: timeout (%dms)\n", TIMEOUT);
+ printk(KERN_ERR "MPC624: timeout (%dms)\n", TIMEOUT);
data[n] = 0;
return -ETIMEDOUT;
}
- // Start reading data
+ /* Start reading data */
data_in = 0;
data_out = devpriv->ulConvertionRate;
- comedi_udelay(1);
+ udelay(1);
for (i = 0; i < 32; i++) {
- // Set the clock low
+ /* Set the clock low */
outb(0, dev->iobase + MPC624_ADC);
- comedi_udelay(1);
+ udelay(1);
- if (data_out & (1 << 31)) // the next bit is a 1
- {
- // Set the ADSDI line (send to MPC624)
+ if (data_out & (1 << 31)) { /* the next bit is a 1 */
+ /* Set the ADSDI line (send to MPC624) */
outb(MPC624_ADSDI, dev->iobase + MPC624_ADC);
- comedi_udelay(1);
- // Set the clock high
+ udelay(1);
+ /* Set the clock high */
outb(MPC624_ADSCK | MPC624_ADSDI,
- dev->iobase + MPC624_ADC);
- } else // the next bit is a 0
- {
- // Set the ADSDI line (send to MPC624)
+ dev->iobase + MPC624_ADC);
+ } else { /* the next bit is a 0 */
+
+ /* Set the ADSDI line (send to MPC624) */
outb(0, dev->iobase + MPC624_ADC);
- comedi_udelay(1);
- // Set the clock high
+ udelay(1);
+ /* Set the clock high */
outb(MPC624_ADSCK, dev->iobase + MPC624_ADC);
}
- // Read ADSDO on high clock (receive from MPC624)
- comedi_udelay(1);
+ /* Read ADSDO on high clock (receive from MPC624) */
+ udelay(1);
data_in <<= 1;
data_in |=
- (inb(dev->iobase +
- MPC624_ADC) & MPC624_ADSDO) >> 4;
- comedi_udelay(1);
+ (inb(dev->iobase + MPC624_ADC) & MPC624_ADSDO) >> 4;
+ udelay(1);
data_out <<= 1;
}
- // Received 32-bit long value consist of:
- // 31: EOC (End Of Transmission) bit - should be 0
- // 30: DMY (Dummy) bit - should be 0
- // 29: SIG (Sign) bit - 1 if the voltage is positive, 0 if negative
- // 28: MSB (Most Significant Bit) - the first bit of convertion result
- // ....
- // 05: LSB (Least Significant Bit) - the last bit of convertion result
- // 04: sub-LSB - sub-LSBs are basically noise, but when
- // 03: sub-LSB averaged properly, they can increase convertion
- // 02: sub-LSB precision up to 29 bits; they can be discarded
- // 01: sub-LSB without loss of resolution.
- // 00: sub-LSB
+ /*
+ * Received 32-bit long value consist of:
+ * 31: EOC -
+ * (End Of Transmission) bit - should be 0
+ * 30: DMY
+ * (Dummy) bit - should be 0
+ * 29: SIG
+ * (Sign) bit- 1 if the voltage is positive,
+ * 0 if negative
+ * 28: MSB
+ * (Most Significant Bit) - the first bit of
+ * the conversion result
+ * ....
+ * 05: LSB
+ * (Least Significant Bit)- the last bit of the
+ * conversion result
+ * 04-00: sub-LSB
+ * - sub-LSBs are basically noise, but when
+ * averaged properly, they can increase conversion
+ * precision up to 29 bits; they can be discarded
+ * without loss of resolution.
+ */
if (data_in & MPC624_EOC_BIT)
- rt_printk("MPC624: EOC bit is set (data_in=%lu)!",
- data_in);
+ printk(KERN_INFO "MPC624:EOC bit is set (data_in=%lu)!",
+ data_in);
if (data_in & MPC624_DMY_BIT)
- rt_printk("MPC624: DMY bit is set (data_in=%lu)!",
- data_in);
- if (data_in & MPC624_SGN_BIT) // check the sign bit
- { // The voltage is positive
- data_in &= 0x3FFFFFFF; // EOC and DMY should be 0, but we will mask them out just to be sure
- data[n] = data_in; // comedi operates on unsigned numbers, so we don't clear the SGN bit
- // SGN bit is still set! It's correct, since we're converting to unsigned.
- } else { // The voltage is negative
- // data_in contains a number in 30-bit two's complement code and we must deal with it
+ printk(KERN_INFO "MPC624:DMY bit is set (data_in=%lu)!",
+ data_in);
+ if (data_in & MPC624_SGN_BIT) { /* Volatge is positive */
+ /*
+ * comedi operates on unsigned numbers, so mask off EOC
+ * and DMY and don't clear the SGN bit
+ */
+ data_in &= 0x3FFFFFFF;
+ data[n] = data_in;
+ } else { /* The voltage is negative */
+ /*
+ * data_in contains a number in 30-bit two's complement
+ * code and we must deal with it
+ */
data_in |= MPC624_SGN_BIT;
data_in = ~data_in;
data_in += 1;
data_in &= ~(MPC624_EOC_BIT | MPC624_DMY_BIT);
- // clear EOC and DMY bits
+ /* clear EOC and DMY bits */
data_in = 0x20000000 - data_in;
data[n] = data_in;
}
}
- // Return the number of samples read/written
+ /* Return the number of samples read/written */
return n;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff