Some of the hardware supported by this driver include an 8254 timer. For
aesthetics, convert it to use the comedi_8254 module to provide support for
the 8254 timer.
This also fixes the (*insn_read) and (*insn_write) to work like the comedi
API expects. Currently they only read or write a single value.
It also fixes the (*insn_config). Currently the driver is attempting to
handle the configuration instructions GPCT_RESET and GPCT_SET_OPERATION.
These are just arbitrary valuse and are not real comedi configuration_ids.
They actually coorespond to:
GPCT_RESET -> INSN_CONFIG_DIO_OUTPUT
GPCT_SET_OPERATION -> INSN_CONFIG_ANALOG_TRIG
The number of parameters for the instructions is validated by the comedi
core in check_insn_config_length(). GPCT_RESET happens to work (insn->n == 1)
but GPCT_SET_OPERATION would fail. The INSN_CONFIG_ANALOG_TRIG expects
insn->n == 5 but GPCT_SET_OPERATION in this driver expects insn->n == 2.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/Kconfig | 1 +
drivers/staging/comedi/drivers/me4000.c | 108 ++++----------------------------
2 files changed, 14 insertions(+), 95 deletions(-)
diff --git a/drivers/staging/comedi/Kconfig b/drivers/staging/comedi/Kconfig
index e4ef12b..77c1c99 100644
--- a/drivers/staging/comedi/Kconfig
+++ b/drivers/staging/comedi/Kconfig
@@ -970,6 +970,7 @@ config COMEDI_CB_PCIMDDA
config COMEDI_ME4000
tristate "Meilhaus ME-4000 support"
+ select COMEDI_8254
---help---
Enable support for Meilhaus PCI data acquisition cards
ME-4650, ME-4670i, ME-4680, ME-4680i and ME-4680is
diff --git a/drivers/staging/comedi/drivers/me4000.c
b/drivers/staging/comedi/drivers/me4000.c
index d120aa2..2d0e60d 100644
--- a/drivers/staging/comedi/drivers/me4000.c
+++ b/drivers/staging/comedi/drivers/me4000.c
@@ -48,7 +48,7 @@ broken.
#include "../comedidev.h"
#include "comedi_fc.h"
-#include "8253.h"
+#include "comedi_8254.h"
#include "plx9052.h"
#define ME4000_FIRMWARE "me4000_firmware.bin"
@@ -170,7 +170,6 @@ broken.
struct me4000_info {
unsigned long plx_regbase;
- unsigned long timer_regbase;
};
enum me4000_boardid {
@@ -1259,85 +1258,6 @@ static int me4000_dio_insn_config(struct comedi_device
*dev,
return insn->n;
}
-/*=============================================================================
- Counter section
- ===========================================================================*/
-
-static int me4000_cnt_insn_config(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- struct me4000_info *info = dev->private;
- unsigned int chan = CR_CHAN(insn->chanspec);
- int err;
-
- switch (data[0]) {
- case GPCT_RESET:
- if (insn->n != 1)
- return -EINVAL;
-
- err = i8254_set_mode(info->timer_regbase, 0, chan,
- I8254_MODE0 | I8254_BINARY);
- if (err)
- return err;
- i8254_write(info->timer_regbase, 0, chan, 0);
- break;
- case GPCT_SET_OPERATION:
- if (insn->n != 2)
- return -EINVAL;
-
- err = i8254_set_mode(info->timer_regbase, 0, chan,
- (data[1] << 1) | I8254_BINARY);
- if (err)
- return err;
- break;
- default:
- return -EINVAL;
- }
-
- return insn->n;
-}
-
-static int me4000_cnt_insn_read(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
-{
- struct me4000_info *info = dev->private;
-
- if (insn->n == 0)
- return 0;
-
- if (insn->n > 1) {
- dev_err(dev->class_dev, "Invalid instruction length %d\n",
- insn->n);
- return -EINVAL;
- }
-
- data[0] = i8254_read(info->timer_regbase, 0, insn->chanspec);
-
- return 1;
-}
-
-static int me4000_cnt_insn_write(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
-{
- struct me4000_info *info = dev->private;
-
- if (insn->n == 0) {
- return 0;
- } else if (insn->n > 1) {
- dev_err(dev->class_dev, "Invalid instruction length %d\n",
- insn->n);
- return -EINVAL;
- }
-
- i8254_write(info->timer_regbase, 0, insn->chanspec, data[0]);
-
- return 1;
-}
-
static int me4000_auto_attach(struct comedi_device *dev,
unsigned long context)
{
@@ -1364,8 +1284,7 @@ static int me4000_auto_attach(struct comedi_device *dev,
info->plx_regbase = pci_resource_start(pcidev, 1);
dev->iobase = pci_resource_start(pcidev, 2);
- info->timer_regbase = pci_resource_start(pcidev, 3);
- if (!info->plx_regbase || !dev->iobase || !info->timer_regbase)
+ if (!info->plx_regbase || !dev->iobase)
return -ENODEV;
result = comedi_load_firmware(dev, &pcidev->dev, ME4000_FIRMWARE,
@@ -1462,20 +1381,19 @@ static int me4000_auto_attach(struct comedi_device *dev,
dev->iobase + ME4000_DIO_DIR_REG);
}
- /*=========================================================================
- Counter subdevice
-
========================================================================*/
-
+ /* Counter subdevice (8254) */
s = &dev->subdevices[3];
-
if (thisboard->has_counter) {
- s->type = COMEDI_SUBD_COUNTER;
- s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
- s->n_chan = 3;
- s->maxdata = 0xFFFF; /* 16 bit counters */
- s->insn_read = me4000_cnt_insn_read;
- s->insn_write = me4000_cnt_insn_write;
- s->insn_config = me4000_cnt_insn_config;
+ unsigned long timer_base = pci_resource_start(pcidev, 3);
+
+ if (!timer_base)
+ return -ENODEV;
+
+ dev->pacer = comedi_8254_init(timer_base, 0, I8254_IO8, 0);
+ if (!dev->pacer)
+ return -ENOMEM;
+
+ comedi_8254_subdevice_init(s, dev->pacer);
} else {
s->type = COMEDI_SUBD_UNUSED;
}
--
2.3.0
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