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staging: comedi: amplc_pci224: convert driver to use the comedi_8254 module 

This driver uses an 8254 timer to generate the pacer clock used for analog
output data conversion. Convert it to use the comedi_8254 module to provide
support for the 8254 timer.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2015-02-23 14:57:35 -07:00 committed by Greg Kroah-Hartman
parent 0880acf846
commit 6aa37d7916
2 changed files with 14 additions and 21 deletions
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1
drivers/staging/comedi/Kconfig
View File

@ -804,6 +804,7 @@ config COMEDI_AMPLC_PC263_PCI
config COMEDI_AMPLC_PCI224
tristate "Amplicon PCI224 and PCI234 support"
select COMEDI_8254
---help---
Enable support for Amplicon PCI224 and PCI234 AO boards

34
drivers/staging/comedi/drivers/amplc_pci224.c
View File

@ -110,15 +110,12 @@
#include "../comedidev.h"
#include "comedi_fc.h"
#include "8253.h"
#include "comedi_8254.h"
/*
* PCI224/234 i/o space 1 (PCIBAR2) registers.
*/
#define PCI224_Z2_CT0 0x14 /* 82C54 counter/timer 0 */
#define PCI224_Z2_CT1 0x15 /* 82C54 counter/timer 1 */
#define PCI224_Z2_CT2 0x16 /* 82C54 counter/timer 2 */
#define PCI224_Z2_CTC 0x17 /* 82C54 counter/timer control word */
#define PCI224_Z2_BASE 0x14 /* 82C54 counter/timer */
#define PCI224_ZCLK_SCE 0x1A /* Group Z Clock Configuration Register */
#define PCI224_ZGAT_SCE 0x1D /* Group Z Gate Configuration Register */
#define PCI224_INT_SCE 0x1E /* ISR Interrupt source mask register */
@ -379,8 +376,6 @@ struct pci224_private {
int intr_cpuid;
short intr_running;
unsigned short daccon;
unsigned int cached_div1;
unsigned int cached_div2;
unsigned short ao_enab; /* max 16 channels so 'short' will do */
unsigned char intsce;
};
@ -668,7 +663,6 @@ static int
pci224_ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_cmd *cmd)
{
struct pci224_private *devpriv = dev->private;
int err = 0;
unsigned int arg;
@ -793,10 +787,7 @@ pci224_ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
if (cmd->scan_begin_src == TRIG_TIMER) {
arg = cmd->scan_begin_arg;
/* Use two timers. */
i8253_cascade_ns_to_timer(I8254_OSC_BASE_10MHZ,
&devpriv->cached_div1,
&devpriv->cached_div2,
&arg, cmd->flags);
comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
}
@ -817,7 +808,6 @@ static void pci224_ao_start_pacer(struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct pci224_private *devpriv = dev->private;
unsigned long timer_base = devpriv->iobase1 + PCI224_Z2_CT0;
/*
* The output of timer Z2-0 will be used as the scan trigger
@ -830,14 +820,10 @@ static void pci224_ao_start_pacer(struct comedi_device *dev,
outb(GAT_CONFIG(2, GAT_VCC), devpriv->iobase1 + PCI224_ZGAT_SCE);
/* Z2-2 needs 10 MHz clock. */
outb(CLK_CONFIG(2, CLK_10MHZ), devpriv->iobase1 + PCI224_ZCLK_SCE);
/* Load Z2-2 mode (2) and counter (div1). */
i8254_set_mode(timer_base, 0, 2, I8254_MODE2 | I8254_BINARY);
i8254_write(timer_base, 0, 2, devpriv->cached_div1);
/* Z2-0 is clocked from Z2-2's output. */
outb(CLK_CONFIG(0, CLK_OUTNM1), devpriv->iobase1 + PCI224_ZCLK_SCE);
/* Load Z2-0 mode (2) and counter (div2). */
i8254_set_mode(timer_base, 0, 0, I8254_MODE2 | I8254_BINARY);
i8254_write(timer_base, 0, 0, devpriv->cached_div2);
comedi_8254_pacer_enable(dev->pacer, 2, 0, false);
}
static int pci224_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
@ -855,7 +841,6 @@ static int pci224_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
if (cmd->chanlist == NULL || cmd->chanlist_len == 0)
return -EINVAL;
/* Determine which channels are enabled and their load order. */
devpriv->ao_enab = 0;
@ -893,8 +878,10 @@ static int pci224_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
outw(devpriv->daccon | PCI224_DACCON_FIFORESET,
dev->iobase + PCI224_DACCON);
if (cmd->scan_begin_src == TRIG_TIMER)
if (cmd->scan_begin_src == TRIG_TIMER) {
comedi_8254_update_divisors(dev->pacer);
pci224_ao_start_pacer(dev, s);
}
spin_lock_irqsave(&devpriv->ao_spinlock, flags);
if (cmd->start_src == TRIG_INT) {
@ -1063,6 +1050,11 @@ pci224_auto_attach(struct comedi_device *dev, unsigned long context_model)
outw(devpriv->daccon | PCI224_DACCON_FIFORESET,
dev->iobase + PCI224_DACCON);
dev->pacer = comedi_8254_init(devpriv->iobase1 + PCI224_Z2_BASE,
I8254_OSC_BASE_10MHZ, I8254_IO8, 0);
if (!dev->pacer)
return -ENOMEM;
ret = comedi_alloc_subdevices(dev, 1);
if (ret)
return ret;