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staging: comedi: adv_pci1724: define the dac control register bits 

Define the bits for the DAC control register and remove the enum along
with the helper functions.

Simplify adv_pci1724_insn_write() a bit. The 'ctrl' bits are based on
the 'chan' and 'mode' and do not need to be recalculated for each 'val'.

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 2014-11-20 15:10:53 -07:00 committed by Greg Kroah-Hartman
parent c2edc02163
commit 83d94bcc8e
1 changed files with 15 additions and 40 deletions
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55
drivers/staging/comedi/drivers/adv_pci1724.c
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@ -61,43 +61,18 @@ supported PCI devices are configured as comedi devices automatically.
* PCI bar 2 Register I/O map (dev->iobase)
*/
#define PCI1724_DAC_CTRL_REG 0x00
#define PCI1724_DAC_CTRL_GX(x) (1 << (20 + ((x) / 8)))
#define PCI1724_DAC_CTRL_CX(x) (((x) % 8) << 16)
#define PCI1724_DAC_CTRL_MODE_GAIN (1 << 14)
#define PCI1724_DAC_CTRL_MODE_OFFSET (2 << 14)
#define PCI1724_DAC_CTRL_MODE_NORMAL (3 << 14)
#define PCI1724_DAC_CTRL_MODE_MASK (3 << 14)
#define PCI1724_DAC_CTRL_DATA(x) (((x) & 0x3fff) << 0)
#define PCI1724_SYNC_OUTPUT_REG 0x04
#define PCI1724_EEPROM_CTRL_REG 0x08
#define PCI1724_SYNC_OUTPUT_TRIG_REG 0x0c
#define PCI1724_BOARD_ID_REG 0x10
/* bit definitions for registers */
enum dac_control_contents {
DAC_DATA_MASK = 0x3fff,
DAC_DESTINATION_MASK = 0xc000,
DAC_NORMAL_MODE = 0xc000,
DAC_OFFSET_MODE = 0x8000,
DAC_GAIN_MODE = 0x4000,
DAC_CHANNEL_SELECT_MASK = 0xf0000,
DAC_GROUP_SELECT_MASK = 0xf00000
};
static uint32_t dac_data_bits(uint16_t dac_data)
{
return dac_data & DAC_DATA_MASK;
}
static uint32_t dac_channel_select_bits(unsigned channel)
{
return (channel << 16) & DAC_CHANNEL_SELECT_MASK;
}
static uint32_t dac_group_select_bits(unsigned group)
{
return (1 << (20 + group)) & DAC_GROUP_SELECT_MASK;
}
static uint32_t dac_channel_and_group_select_bits(unsigned comedi_channel)
{
return dac_channel_select_bits(comedi_channel % 8) |
dac_group_select_bits(comedi_channel / 8);
}
enum sync_output_contents {
SYNC_MODE = 0x1,
DAC_BUSY = 0x2, /* dac state machine is not ready */
@ -140,24 +115,24 @@ static int adv_pci1724_insn_write(struct comedi_device *dev,
{
unsigned long mode = (unsigned long)s->private;
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int ctrl;
int ret;
int i;
ctrl = PCI1724_DAC_CTRL_GX(chan) | PCI1724_DAC_CTRL_CX(chan) | mode;
/* turn off synchronous mode */
outl(0, dev->iobase + PCI1724_SYNC_OUTPUT_REG);
for (i = 0; i < insn->n; ++i) {
unsigned int val = data[i];
unsigned int ctrl;
ret = comedi_timeout(dev, s, insn, adv_pci1724_dac_idle, 0);
if (ret)
return ret;
ctrl = mode;
ctrl |= dac_channel_and_group_select_bits(chan);
ctrl |= dac_data_bits(val);
outl(ctrl, dev->iobase + PCI1724_DAC_CTRL_REG);
outl(ctrl | PCI1724_DAC_CTRL_DATA(val),
dev->iobase + PCI1724_DAC_CTRL_REG);
s->readback[chan] = val;
}
@ -184,7 +159,7 @@ static int setup_subdevices(struct comedi_device *dev)
s->maxdata = 0x3fff;
s->range_table = &ao_ranges_1724;
s->insn_write = adv_pci1724_insn_write;
s->private = (void *)DAC_NORMAL_MODE;
s->private = (void *)PCI1724_DAC_CTRL_MODE_NORMAL;
ret = comedi_alloc_subdev_readback(s);
if (ret)
@ -197,7 +172,7 @@ static int setup_subdevices(struct comedi_device *dev)
s->n_chan = 32;
s->maxdata = 0x3fff;
s->insn_write = adv_pci1724_insn_write;
s->private = (void *)DAC_OFFSET_MODE;
s->private = (void *)PCI1724_DAC_CTRL_MODE_OFFSET;
ret = comedi_alloc_subdev_readback(s);
if (ret)
@ -210,7 +185,7 @@ static int setup_subdevices(struct comedi_device *dev)
s->n_chan = 32;
s->maxdata = 0x3fff;
s->insn_write = adv_pci1724_insn_write;
s->private = (void *)DAC_GAIN_MODE;
s->private = (void *)PCI1724_DAC_CTRL_MODE_GAIN;
ret = comedi_alloc_subdev_readback(s);
if (ret)