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staging: fix comedi NI labpc driver build when ISA_DMA_API is not ena…
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…bled

Fix ni_labpc.c to build when CONFIG_ISA_DMA_API is not enabled.

This is a driver that supports both ISA and PCI devices.
It now builds when for PCI-only support or for both
ISA and PCI device support.
(It does not support ISA-only without PCI.)

Signed-off-by: Randy Dunlap <[email protected]>
Cc: Ian Abbott <[email protected]>
Cc: Frank Mori Hess <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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@rddunlap @gregkh
rddunlap authored and gregkh committed Jul 5, 2011
1 parent 819cbb1 commit 3297d6c
Showing 1 changed file with 33 additions and 3 deletions.
36 changes: 33 additions & 3 deletions drivers/staging/comedi/drivers/ni_labpc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -213,8 +213,10 @@ static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it);
static int labpc_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
static irqreturn_t labpc_interrupt(int irq, void *d);
static int labpc_drain_fifo(struct comedi_device *dev);
#ifdef CONFIG_ISA_DMA_API
static void labpc_drain_dma(struct comedi_device *dev);
static void handle_isa_dma(struct comedi_device *dev);
#endif
static void labpc_drain_dregs(struct comedi_device *dev);
static int labpc_ai_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_cmd *cmd);
Expand All @@ -238,9 +240,9 @@ static int labpc_eeprom_write_insn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data);
static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd);
static void labpc_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd);
#ifdef CONFIG_COMEDI_PCI
static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd);
static int labpc_find_device(struct comedi_device *dev, int bus, int slot);
#endif
static int labpc_dio_mem_callback(int dir, int port, int data,
Expand Down Expand Up @@ -527,7 +529,10 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
{
struct comedi_subdevice *s;
int i;
unsigned long dma_flags, isr_flags;
unsigned long isr_flags;
#ifdef CONFIG_ISA_DMA_API
unsigned long dma_flags;
#endif
short lsb, msb;

printk(KERN_ERR "comedi%d: ni_labpc: %s, io 0x%lx", dev->minor,
Expand Down Expand Up @@ -587,6 +592,7 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
}
dev->irq = irq;

#ifdef CONFIG_ISA_DMA_API
/* grab dma channel */
if (dma_chan > 3) {
printk(KERN_ERR " invalid dma channel %u\n", dma_chan);
Expand All @@ -610,6 +616,7 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
set_dma_mode(devpriv->dma_chan, DMA_MODE_READ);
release_dma_lock(dma_flags);
}
#endif

dev->board_name = thisboard->name;

Expand Down Expand Up @@ -724,9 +731,15 @@ static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
/* get base address, irq etc. based on bustype */
switch (thisboard->bustype) {
case isa_bustype:
#ifdef CONFIG_ISA_DMA_API
iobase = it->options[0];
irq = it->options[1];
dma_chan = it->options[2];
#else
printk(KERN_ERR " this driver has not been built with ISA DMA "
"support.\n");
return -EINVAL;
#endif
break;
case pci_bustype:
#ifdef CONFIG_COMEDI_PCI
Expand Down Expand Up @@ -797,10 +810,12 @@ int labpc_common_detach(struct comedi_device *dev)
if (dev->subdevices)
subdev_8255_cleanup(dev, dev->subdevices + 2);

#ifdef CONFIG_ISA_DMA_API
/* only free stuff if it has been allocated by _attach */
kfree(devpriv->dma_buffer);
if (devpriv->dma_chan)
free_dma(devpriv->dma_chan);
#endif
if (dev->irq)
free_irq(dev->irq, dev);
if (thisboard->bustype == isa_bustype && dev->iobase)
Expand Down Expand Up @@ -1135,7 +1150,9 @@ static int labpc_ai_cmdtest(struct comedi_device *dev,
static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
{
int channel, range, aref;
#ifdef CONFIG_ISA_DMA_API
unsigned long irq_flags;
#endif
int ret;
struct comedi_async *async = s->async;
struct comedi_cmd *cmd = &async->cmd;
Expand Down Expand Up @@ -1182,6 +1199,7 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
devpriv->write_byte(INIT_A1_BITS,
dev->iobase + COUNTER_A_CONTROL_REG);

#ifdef CONFIG_ISA_DMA_API
/* figure out what method we will use to transfer data */
if (devpriv->dma_chan && /* need a dma channel allocated */
/*
Expand All @@ -1193,7 +1211,9 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
thisboard->bustype == isa_bustype) {
xfer = isa_dma_transfer;
/* pc-plus has no fifo-half full interrupt */
} else if (thisboard->register_layout == labpc_1200_layout &&
} else
#endif
if (thisboard->register_layout == labpc_1200_layout &&
/* wake-end-of-scan should interrupt on fifo not empty */
(cmd->flags & TRIG_WAKE_EOS) == 0 &&
/* make sure we are taking more than just a few points */
Expand Down Expand Up @@ -1317,6 +1337,7 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)

labpc_clear_adc_fifo(dev);

#ifdef CONFIG_ISA_DMA_API
/* set up dma transfer */
if (xfer == isa_dma_transfer) {
irq_flags = claim_dma_lock();
Expand All @@ -1340,6 +1361,7 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
devpriv->command3_bits |= DMA_EN_BIT | DMATC_INTR_EN_BIT;
} else
devpriv->command3_bits &= ~DMA_EN_BIT & ~DMATC_INTR_EN_BIT;
#endif

/* enable error interrupts */
devpriv->command3_bits |= ERR_INTR_EN_BIT;
Expand Down Expand Up @@ -1426,6 +1448,7 @@ static irqreturn_t labpc_interrupt(int irq, void *d)
return IRQ_HANDLED;
}

#ifdef CONFIG_ISA_DMA_API
if (devpriv->current_transfer == isa_dma_transfer) {
/*
* if a dma terminal count of external stop trigger
Expand All @@ -1437,6 +1460,7 @@ static irqreturn_t labpc_interrupt(int irq, void *d)
handle_isa_dma(dev);
}
} else
#endif
labpc_drain_fifo(dev);

if (devpriv->status1_bits & TIMER_BIT) {
Expand Down Expand Up @@ -1509,6 +1533,7 @@ static int labpc_drain_fifo(struct comedi_device *dev)
return 0;
}

#ifdef CONFIG_ISA_DMA_API
static void labpc_drain_dma(struct comedi_device *dev)
{
struct comedi_subdevice *s = dev->read_subdev;
Expand Down Expand Up @@ -1571,13 +1596,16 @@ static void handle_isa_dma(struct comedi_device *dev)
/* clear dma tc interrupt */
devpriv->write_byte(0x1, dev->iobase + DMATC_CLEAR_REG);
}
#endif

/* makes sure all data acquired by board is transferred to comedi (used
* when acquisition is terminated by stop_src == TRIG_EXT). */
static void labpc_drain_dregs(struct comedi_device *dev)
{
#ifdef CONFIG_ISA_DMA_API
if (devpriv->current_transfer == isa_dma_transfer)
labpc_drain_dma(dev);
#endif

labpc_drain_fifo(dev);
}
Expand Down Expand Up @@ -1769,6 +1797,7 @@ static int labpc_eeprom_write_insn(struct comedi_device *dev,
return 1;
}

#ifdef CONFIG_ISA_DMA_API
/* utility function that suggests a dma transfer size in bytes */
static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd)
{
Expand All @@ -1792,6 +1821,7 @@ static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd)

return size;
}
#endif

/* figures out what counter values to use based on command */
static void labpc_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd)
Expand Down

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