The drivers that use this module with memory mapped io all have the
ioremap'ed base address stored in the comedi_device 'mmio' member.
Modify subdev_8255_io() to handle the memory mapped io. This allows
removing the private callbacks from some of the drivers.
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/drivers/8255.c | 14 ++++++++++++--
drivers/staging/comedi/drivers/8255_pci.c | 20 ++------------------
drivers/staging/comedi/drivers/cb_pcidas64.c | 13 +------------
drivers/staging/comedi/drivers/ni_labpc.c | 18 +-----------------
4 files changed, 16 insertions(+), 49 deletions(-)
diff --git a/drivers/staging/comedi/drivers/8255.c
b/drivers/staging/comedi/drivers/8255.c
index 39cf12e..4095a87 100644
--- a/drivers/staging/comedi/drivers/8255.c
+++ b/drivers/staging/comedi/drivers/8255.c
@@ -100,11 +100,21 @@ struct subdev_8255_private {
static int subdev_8255_io(struct comedi_device *dev,
int dir, int port, int data, unsigned long regbase)
{
+ unsigned int offset = regbase + port;
+
+ if (dev->mmio) {
+ if (dir) {
+ writeb(data, dev->mmio + offset);
+ return 0;
+ }
+ return readb(dev->mmio + offset);
+ }
+
if (dir) {
- outb(data, dev->iobase + regbase + port);
+ outb(data, dev->iobase + offset);
return 0;
}
- return inb(dev->iobase + regbase + port);
+ return inb(dev->iobase + offset);
}
void subdev_8255_interrupt(struct comedi_device *dev,
diff --git a/drivers/staging/comedi/drivers/8255_pci.c
b/drivers/staging/comedi/drivers/8255_pci.c
index 24e9099..1418cd6 100644
--- a/drivers/staging/comedi/drivers/8255_pci.c
+++ b/drivers/staging/comedi/drivers/8255_pci.c
@@ -190,23 +190,12 @@ static int pci_8255_mite_init(struct pci_dev *pcidev)
return 0;
}
-static int pci_8255_mmio(struct comedi_device *dev,
- int dir, int port, int data, unsigned long iobase)
-{
- if (dir) {
- writeb(data, dev->mmio + iobase + port);
- return 0;
- }
- return readb(dev->mmio + iobase + port);
-}
-
static int pci_8255_auto_attach(struct comedi_device *dev,
unsigned long context)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
const struct pci_8255_boardinfo *board = NULL;
struct comedi_subdevice *s;
- bool is_mmio;
int ret;
int i;
@@ -227,9 +216,7 @@ static int pci_8255_auto_attach(struct comedi_device *dev,
return ret;
}
- is_mmio = (pci_resource_flags(pcidev, board->dio_badr) &
- IORESOURCE_MEM) != 0;
- if (is_mmio) {
+ if ((pci_resource_flags(pcidev, board->dio_badr) & IORESOURCE_MEM)) {
dev->mmio = pci_ioremap_bar(pcidev, board->dio_badr);
if (!dev->mmio)
return -ENOMEM;
@@ -248,10 +235,7 @@ static int pci_8255_auto_attach(struct comedi_device *dev,
for (i = 0; i < board->n_8255; i++) {
s = &dev->subdevices[i];
- if (is_mmio)
- ret = subdev_8255_init(dev, s, pci_8255_mmio, i * 4);
- else
- ret = subdev_8255_init(dev, s, NULL, i * 4);
+ ret = subdev_8255_init(dev, s, NULL, i * 4);
if (ret)
return ret;
}
diff --git a/drivers/staging/comedi/drivers/cb_pcidas64.c
b/drivers/staging/comedi/drivers/cb_pcidas64.c
index f94923b..9c18789 100644
--- a/drivers/staging/comedi/drivers/cb_pcidas64.c
+++ b/drivers/staging/comedi/drivers/cb_pcidas64.c
@@ -3369,16 +3369,6 @@ static int ao_cancel(struct comedi_device *dev, struct
comedi_subdevice *s)
return 0;
}
-static int dio_callback(struct comedi_device *dev,
- int dir, int port, int data, unsigned long iobase)
-{
- if (dir) {
- writeb(data, dev->mmio + iobase + port);
- return 0;
- }
- return readb(dev->mmio + iobase + port);
-}
-
static int dio_callback_4020(struct comedi_device *dev,
int dir, int port, int data, unsigned long iobase)
{
@@ -3842,8 +3832,7 @@ static int setup_subdevices(struct comedi_device *dev)
ret = subdev_8255_init(dev, s, dio_callback_4020,
I8255_4020_REG);
} else {
- ret = subdev_8255_init(dev, s, dio_callback,
- DIO_8255_OFFSET);
+ ret = subdev_8255_init(dev, s, NULL, DIO_8255_OFFSET);
}
if (ret)
return ret;
diff --git a/drivers/staging/comedi/drivers/ni_labpc.c
b/drivers/staging/comedi/drivers/ni_labpc.c
index 8f914de..5515b36 100644
--- a/drivers/staging/comedi/drivers/ni_labpc.c
+++ b/drivers/staging/comedi/drivers/ni_labpc.c
@@ -1035,17 +1035,6 @@ static int labpc_ao_insn_read(struct comedi_device *dev,
return 1;
}
-static int labpc_8255_mmio(struct comedi_device *dev,
- int dir, int port, int data, unsigned long iobase)
-{
- if (dir) {
- writeb(data, dev->mmio + iobase + port);
- return 0;
- }
-
- return readb(dev->mmio + iobase + port);
-}
-
/* lowlevel write to eeprom/dac */
static void labpc_serial_out(struct comedi_device *dev, unsigned int value,
unsigned int value_width)
@@ -1401,12 +1390,7 @@ int labpc_common_attach(struct comedi_device *dev,
/* 8255 dio */
s = &dev->subdevices[2];
- if (dev->mmio) {
- ret = subdev_8255_init(dev, s, labpc_8255_mmio,
- DIO_BASE_REG);
- } else {
- ret = subdev_8255_init(dev, s, NULL, DIO_BASE_REG);
- }
+ ret = subdev_8255_init(dev, s, NULL, DIO_BASE_REG);
if (ret)
return ret;
--
2.0.3
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