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Date: Fri, 29 Jun 2012 10:58:41 -0700
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Linux Kernel <linux-kernel@...r.kernel.org>
CC: <devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
<fmhess@...rs.sourceforge.net>, <gregkh@...uxfoundation.org>
Subject: [PATCH 1/7] staging: comedi: das_08: use the 8253 helper functions
Instead of open-coding the 8254 timer io, use the helper functions
provided by 8253.h.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Frank Mori Hess <fmhess@...rs.sourceforge.net>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/staging/comedi/drivers/das08.c | 39 ++++++----------------------------
1 file changed, 7 insertions(+), 32 deletions(-)
diff --git a/drivers/staging/comedi/drivers/das08.c b/drivers/staging/comedi/drivers/das08.c
index d0128e0..036953e 100644
--- a/drivers/staging/comedi/drivers/das08.c
+++ b/drivers/staging/comedi/drivers/das08.c
@@ -56,6 +56,7 @@
#include <linux/delay.h>
#include "8255.h"
+#include "8253.h"
#include "das08.h"
#define DRV_NAME "das08"
@@ -434,38 +435,13 @@ das08ao_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
static unsigned int i8254_read_channel_low(unsigned int base, int chan)
{
- unsigned int msb, lsb;
-
- /* The following instructions must be in order.
- We must avoid other process reading the counter's value in the
- middle.
- The spin_lock isn't needed since ioctl calls grab the big kernel
- lock automatically */
- /*spin_lock(sp); */
- outb(chan << 6, base + I8254_CTRL);
- base += chan;
- lsb = inb(base);
- msb = inb(base);
- /*spin_unlock(sp); */
-
- return lsb | (msb << 8);
+ return i8254_read(base, 0, chan);
}
static void i8254_write_channel_low(unsigned int base, int chan,
unsigned int value)
{
- unsigned int msb, lsb;
-
- lsb = value & 0xFF;
- msb = value >> 8;
-
- /* write lsb, then msb */
- base += chan;
- /* See comments in i8254_read_channel_low */
- /*spin_lock(sp); */
- outb(lsb, base);
- outb(msb, base);
- /*spin_unlock(sp); */
+ i8254_write(base, 0, chan, value);
}
static unsigned int i8254_read_channel(struct i8254_struct *st, int channel)
@@ -486,10 +462,10 @@ static void i8254_write_channel(struct i8254_struct *st, int channel,
static void i8254_set_mode_low(unsigned int base, int channel,
unsigned int mode)
{
- outb((channel << 6) | 0x30 | (mode & 0x0F), base + I8254_CTRL);
+ i8254_set_mode(base, 0, channel, mode);
}
-static void i8254_set_mode(struct i8254_struct *st, int channel,
+static void __i8254_set_mode(struct i8254_struct *st, int channel,
unsigned int mode)
{
int chan = st->logic2phys[channel];
@@ -500,8 +476,7 @@ static void i8254_set_mode(struct i8254_struct *st, int channel,
static unsigned int i8254_read_status_low(unsigned int base, int channel)
{
- outb(0xE0 | (2 << channel), base + I8254_CTRL);
- return inb(base + channel);
+ return i8254_status(base, 0, channel);
}
static unsigned int i8254_read_status(struct i8254_struct *st, int channel)
@@ -550,7 +525,7 @@ static int das08_counter_config(struct comedi_device *dev,
switch (data[0]) {
case INSN_CONFIG_SET_COUNTER_MODE:
- i8254_set_mode(&devpriv->i8254, chan, data[1]);
+ __i8254_set_mode(&devpriv->i8254, chan, data[1]);
break;
case INSN_CONFIG_8254_READ_STATUS:
data[1] = i8254_read_status(&devpriv->i8254, chan);
--
1.7.11
--
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