Complete the refactor of the das1800 driver to remove all the
forward declarations.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Mori Hess <fmhess@xxxxxxxxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
No code changes here, just moving of the functions. This file
still has a lot of checkpatch warnings that will be addressed.
drivers/staging/comedi/drivers/das1800.c | 1242 ++++++++++++++----------------
1 files changed, 598 insertions(+), 644 deletions(-)
diff --git a/drivers/staging/comedi/drivers/das1800.c b/drivers/staging/comedi/drivers/das1800.c
index 2ac3443..079fb06 100644
--- a/drivers/staging/comedi/drivers/das1800.c
+++ b/drivers/staging/comedi/drivers/das1800.c
@@ -183,46 +183,6 @@ enum {
das1802hr, das1802hr_da, das1801hc, das1802hc, das1801ao, das1802ao
};
-static int das1800_probe(struct comedi_device *dev);
-static int das1800_cancel(struct comedi_device *dev,
- struct comedi_subdevice *s);
-static irqreturn_t das1800_interrupt(int irq, void *d);
-static int das1800_ai_poll(struct comedi_device *dev,
- struct comedi_subdevice *s);
-static void das1800_ai_handler(struct comedi_device *dev);
-static void das1800_handle_dma(struct comedi_device *dev,
- struct comedi_subdevice *s, unsigned int status);
-static void das1800_flush_dma(struct comedi_device *dev,
- struct comedi_subdevice *s);
-static void das1800_flush_dma_channel(struct comedi_device *dev,
- struct comedi_subdevice *s,
- unsigned int channel, uint16_t *buffer);
-static void das1800_handle_fifo_half_full(struct comedi_device *dev,
- struct comedi_subdevice *s);
-static void das1800_handle_fifo_not_empty(struct comedi_device *dev,
- struct comedi_subdevice *s);
-static int das1800_ai_do_cmdtest(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_cmd *cmd);
-static int das1800_ai_do_cmd(struct comedi_device *dev,
- struct comedi_subdevice *s);
-static int das1800_ai_rinsn(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-static int das1800_ao_winsn(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-static int das1800_di_rbits(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-static int das1800_do_wbits(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data);
-
-static int das1800_set_frequency(struct comedi_device *dev);
-static unsigned int burst_convert_arg(unsigned int convert_arg, int round_mode);
-static unsigned int suggest_transfer_size(struct comedi_cmd *cmd);
-
/* analog input ranges */
static const struct comedi_lrange range_ai_das1801 = {
8,
@@ -515,491 +475,6 @@ static const struct comedi_lrange range_ao_2 = {
};
*/
-static int das1800_init_dma(struct comedi_device *dev, unsigned int dma0,
- unsigned int dma1)
-{
- unsigned long flags;
-
- /* need an irq to do dma */
- if (dev->irq && dma0) {
- /* encode dma0 and dma1 into 2 digit hexadecimal for switch */
- switch ((dma0 & 0x7) | (dma1 << 4)) {
- case 0x5: /* dma0 == 5 */
- devpriv->dma_bits |= DMA_CH5;
- break;
- case 0x6: /* dma0 == 6 */
- devpriv->dma_bits |= DMA_CH6;
- break;
- case 0x7: /* dma0 == 7 */
- devpriv->dma_bits |= DMA_CH7;
- break;
- case 0x65: /* dma0 == 5, dma1 == 6 */
- devpriv->dma_bits |= DMA_CH5_CH6;
- break;
- case 0x76: /* dma0 == 6, dma1 == 7 */
- devpriv->dma_bits |= DMA_CH6_CH7;
- break;
- case 0x57: /* dma0 == 7, dma1 == 5 */
- devpriv->dma_bits |= DMA_CH7_CH5;
- break;
- default:
- dev_err(dev->hw_dev, " only supports dma channels 5 through 7\n"
- " Dual dma only allows the following combinations:\n"
- " dma 5,6 / 6,7 / or 7,5\n");
- return -EINVAL;
- break;
- }
- if (request_dma(dma0, dev->driver->driver_name)) {
- dev_err(dev->hw_dev, "failed to allocate dma channel %i\n",
- dma0);
- return -EINVAL;
- }
- devpriv->dma0 = dma0;
- devpriv->dma_current = dma0;
- if (dma1) {
- if (request_dma(dma1, dev->driver->driver_name)) {
- dev_err(dev->hw_dev, "failed to allocate dma channel %i\n",
- dma1);
- return -EINVAL;
- }
- devpriv->dma1 = dma1;
- }
- devpriv->ai_buf0 = kmalloc(DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA);
- if (devpriv->ai_buf0 == NULL)
- return -ENOMEM;
- devpriv->dma_current_buf = devpriv->ai_buf0;
- if (dma1) {
- devpriv->ai_buf1 =
- kmalloc(DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA);
- if (devpriv->ai_buf1 == NULL)
- return -ENOMEM;
- }
- flags = claim_dma_lock();
- disable_dma(devpriv->dma0);
- set_dma_mode(devpriv->dma0, DMA_MODE_READ);
- if (dma1) {
- disable_dma(devpriv->dma1);
- set_dma_mode(devpriv->dma1, DMA_MODE_READ);
- }
- release_dma_lock(flags);
- }
- return 0;
-}
-
-static int das1800_attach(struct comedi_device *dev,
- struct comedi_devconfig *it)
-{
- struct comedi_subdevice *s;
- unsigned long iobase = it->options[0];
- unsigned int irq = it->options[1];
- unsigned int dma0 = it->options[2];
- unsigned int dma1 = it->options[3];
- unsigned long iobase2;
- int board;
- int retval;
-
- /* allocate and initialize dev->private */
- if (alloc_private(dev, sizeof(struct das1800_private)) < 0)
- return -ENOMEM;
-
- printk(KERN_DEBUG "comedi%d: %s: io 0x%lx", dev->minor,
- dev->driver->driver_name, iobase);
- if (irq) {
- printk(KERN_CONT ", irq %u", irq);
- if (dma0) {
- printk(KERN_CONT ", dma %u", dma0);
- if (dma1)
- printk(KERN_CONT " and %u", dma1);
- }
- }
- printk(KERN_CONT "\n");
-
- if (iobase == 0) {
- dev_err(dev->hw_dev, "io base address required\n");
- return -EINVAL;
- }
-
- /* check if io addresses are available */
- if (!request_region(iobase, DAS1800_SIZE, dev->driver->driver_name)) {
- printk
- (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n",
- iobase, iobase + DAS1800_SIZE - 1);
- return -EIO;
- }
- dev->iobase = iobase;
-
- board = das1800_probe(dev);
- if (board < 0) {
- dev_err(dev->hw_dev, "unable to determine board type\n");
- return -ENODEV;
- }
-
- dev->board_ptr = das1800_boards + board;
- dev->board_name = thisboard->name;
-
- /* if it is an 'ao' board with fancy analog out then we need extra io ports */
- if (thisboard->ao_ability == 2) {
- iobase2 = iobase + IOBASE2;
- if (!request_region(iobase2, DAS1800_SIZE,
- dev->driver->driver_name)) {
- printk
- (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n",
- iobase2, iobase2 + DAS1800_SIZE - 1);
- return -EIO;
- }
- devpriv->iobase2 = iobase2;
- }
-
- /* grab our IRQ */
- if (irq) {
- if (request_irq(irq, das1800_interrupt, 0,
- dev->driver->driver_name, dev)) {
- dev_dbg(dev->hw_dev, "unable to allocate irq %u\n",
- irq);
- return -EINVAL;
- }
- }
- dev->irq = irq;
-
- /* set bits that tell card which irq to use */
- switch (irq) {
- case 0:
- break;
- case 3:
- devpriv->irq_dma_bits |= 0x8;
- break;
- case 5:
- devpriv->irq_dma_bits |= 0x10;
- break;
- case 7:
- devpriv->irq_dma_bits |= 0x18;
- break;
- case 10:
- devpriv->irq_dma_bits |= 0x28;
- break;
- case 11:
- devpriv->irq_dma_bits |= 0x30;
- break;
- case 15:
- devpriv->irq_dma_bits |= 0x38;
- break;
- default:
- dev_err(dev->hw_dev, "irq out of range\n");
- return -EINVAL;
- break;
- }
-
- retval = das1800_init_dma(dev, dma0, dma1);
- if (retval < 0)
- return retval;
-
- if (devpriv->ai_buf0 == NULL) {
- devpriv->ai_buf0 =
- kmalloc(FIFO_SIZE * sizeof(uint16_t), GFP_KERNEL);
- if (devpriv->ai_buf0 == NULL)
- return -ENOMEM;
- }
-
- if (alloc_subdevices(dev, 4) < 0)
- return -ENOMEM;
-
- /* analog input subdevice */
- s = dev->subdevices + 0;
- dev->read_subdev = s;
- s->type = COMEDI_SUBD_AI;
- s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_GROUND | SDF_CMD_READ;
- if (thisboard->common)
- s->subdev_flags |= SDF_COMMON;
- s->n_chan = thisboard->qram_len;
- s->len_chanlist = thisboard->qram_len;
- s->maxdata = (1 << thisboard->resolution) - 1;
- s->range_table = thisboard->range_ai;
- s->do_cmd = das1800_ai_do_cmd;
- s->do_cmdtest = das1800_ai_do_cmdtest;
- s->insn_read = das1800_ai_rinsn;
- s->poll = das1800_ai_poll;
- s->cancel = das1800_cancel;
-
- /* analog out */
- s = dev->subdevices + 1;
- if (thisboard->ao_ability == 1) {
- s->type = COMEDI_SUBD_AO;
- s->subdev_flags = SDF_WRITABLE;
- s->n_chan = thisboard->ao_n_chan;
- s->maxdata = (1 << thisboard->resolution) - 1;
- s->range_table = &range_ao_1;
- s->insn_write = das1800_ao_winsn;
- } else {
- s->type = COMEDI_SUBD_UNUSED;
- }
-
- /* di */
- s = dev->subdevices + 2;
- s->type = COMEDI_SUBD_DI;
- s->subdev_flags = SDF_READABLE;
- s->n_chan = 4;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = das1800_di_rbits;
-
- /* do */
- s = dev->subdevices + 3;
- s->type = COMEDI_SUBD_DO;
- s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
- s->n_chan = thisboard->do_n_chan;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = das1800_do_wbits;
-
- das1800_cancel(dev, dev->read_subdev);
-
- /* initialize digital out channels */
- outb(devpriv->do_bits, dev->iobase + DAS1800_DIGITAL);
-
- /* initialize analog out channels */
- if (thisboard->ao_ability == 1) {
- /* select 'update' dac channel for baseAddress + 0x0 */
- outb(DAC(thisboard->ao_n_chan - 1),
- dev->iobase + DAS1800_SELECT);
- outw(devpriv->ao_update_bits, dev->iobase + DAS1800_DAC);
- }
-
- return 0;
-};
-
-static void das1800_detach(struct comedi_device *dev)
-{
- if (dev->iobase)
- release_region(dev->iobase, DAS1800_SIZE);
- if (dev->irq)
- free_irq(dev->irq, dev);
- if (dev->private) {
- if (devpriv->iobase2)
- release_region(devpriv->iobase2, DAS1800_SIZE);
- if (devpriv->dma0)
- free_dma(devpriv->dma0);
- if (devpriv->dma1)
- free_dma(devpriv->dma1);
- kfree(devpriv->ai_buf0);
- kfree(devpriv->ai_buf1);
- }
-};
-
-/* probes and checks das-1800 series board type
- */
-static int das1800_probe(struct comedi_device *dev)
-{
- int id;
- int board;
-
- id = (inb(dev->iobase + DAS1800_DIGITAL) >> 4) & 0xf; /* get id bits */
- board = ((struct das1800_board *)dev->board_ptr) - das1800_boards;
-
- switch (id) {
- case 0x3:
- if (board == das1801st_da || board == das1802st_da ||
- board == das1701st_da || board == das1702st_da) {
- dev_dbg(dev->hw_dev, "Board model: %s\n",
- das1800_boards[board].name);
- return board;
- }
- printk
- (" Board model (probed, not recommended): das-1800st-da series\n");
- return das1801st;
- break;
- case 0x4:
- if (board == das1802hr_da || board == das1702hr_da) {
- dev_dbg(dev->hw_dev, "Board model: %s\n",
- das1800_boards[board].name);
- return board;
- }
- printk
- (" Board model (probed, not recommended): das-1802hr-da\n");
- return das1802hr;
- break;
- case 0x5:
- if (board == das1801ao || board == das1802ao ||
- board == das1701ao || board == das1702ao) {
- dev_dbg(dev->hw_dev, "Board model: %s\n",
- das1800_boards[board].name);
- return board;
- }
- printk
- (" Board model (probed, not recommended): das-1800ao series\n");
- return das1801ao;
- break;
- case 0x6:
- if (board == das1802hr || board == das1702hr) {
- dev_dbg(dev->hw_dev, "Board model: %s\n",
- das1800_boards[board].name);
- return board;
- }
- printk
- (" Board model (probed, not recommended): das-1802hr\n");
- return das1802hr;
- break;
- case 0x7:
- if (board == das1801st || board == das1802st ||
- board == das1701st || board == das1702st) {
- dev_dbg(dev->hw_dev, "Board model: %s\n",
- das1800_boards[board].name);
- return board;
- }
- printk
- (" Board model (probed, not recommended): das-1800st series\n");
- return das1801st;
- break;
- case 0x8:
- if (board == das1801hc || board == das1802hc) {
- dev_dbg(dev->hw_dev, "Board model: %s\n",
- das1800_boards[board].name);
- return board;
- }
- printk
- (" Board model (probed, not recommended): das-1800hc series\n");
- return das1801hc;
- break;
- default:
- printk
- (" Board model: probe returned 0x%x (unknown, please report)\n",
- id);
- return board;
- break;
- }
- return -1;
-}
-
-static int das1800_ai_poll(struct comedi_device *dev,
- struct comedi_subdevice *s)
-{
- unsigned long flags;
-
- /* prevent race with interrupt handler */
- spin_lock_irqsave(&dev->spinlock, flags);
- das1800_ai_handler(dev);
- spin_unlock_irqrestore(&dev->spinlock, flags);
-
- return s->async->buf_write_count - s->async->buf_read_count;
-}
-
-static irqreturn_t das1800_interrupt(int irq, void *d)
-{
- struct comedi_device *dev = d;
- unsigned int status;
-
- if (dev->attached == 0) {
- comedi_error(dev, "premature interrupt");
- return IRQ_HANDLED;
- }
-
- /* Prevent race with das1800_ai_poll() on multi processor systems.
- * Also protects indirect addressing in das1800_ai_handler */
- spin_lock(&dev->spinlock);
- status = inb(dev->iobase + DAS1800_STATUS);
-
- /* if interrupt was not caused by das-1800 */
- if (!(status & INT)) {
- spin_unlock(&dev->spinlock);
- return IRQ_NONE;
- }
- /* clear the interrupt status bit INT */
- outb(CLEAR_INTR_MASK & ~INT, dev->iobase + DAS1800_STATUS);
- /* handle interrupt */
- das1800_ai_handler(dev);
-
- spin_unlock(&dev->spinlock);
- return IRQ_HANDLED;
-}
-
-/* the guts of the interrupt handler, that is shared with das1800_ai_poll */
-static void das1800_ai_handler(struct comedi_device *dev)
-{
- struct comedi_subdevice *s = dev->subdevices + 0; /* analog input subdevice */
- struct comedi_async *async = s->async;
- struct comedi_cmd *cmd = &async->cmd;
- unsigned int status = inb(dev->iobase + DAS1800_STATUS);
-
- async->events = 0;
- /* select adc for base address + 0 */
- outb(ADC, dev->iobase + DAS1800_SELECT);
- /* dma buffer full */
- if (devpriv->irq_dma_bits & DMA_ENABLED) {
- /* look for data from dma transfer even if dma terminal count hasn't happened yet */
- das1800_handle_dma(dev, s, status);
- } else if (status & FHF) { /* if fifo half full */
- das1800_handle_fifo_half_full(dev, s);
- } else if (status & FNE) { /* if fifo not empty */
- das1800_handle_fifo_not_empty(dev, s);
- }
-
- async->events |= COMEDI_CB_BLOCK;
- /* if the card's fifo has overflowed */
- if (status & OVF) {
- /* clear OVF interrupt bit */
- outb(CLEAR_INTR_MASK & ~OVF, dev->iobase + DAS1800_STATUS);
- comedi_error(dev, "DAS1800 FIFO overflow");
- das1800_cancel(dev, s);
- async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
- comedi_event(dev, s);
- return;
- }
- /* stop taking data if appropriate */
- /* stop_src TRIG_EXT */
- if (status & CT0TC) {
- /* clear CT0TC interrupt bit */
- outb(CLEAR_INTR_MASK & ~CT0TC, dev->iobase + DAS1800_STATUS);
- /* make sure we get all remaining data from board before quitting */
- if (devpriv->irq_dma_bits & DMA_ENABLED)
- das1800_flush_dma(dev, s);
- else
- das1800_handle_fifo_not_empty(dev, s);
- das1800_cancel(dev, s); /* disable hardware conversions */
- async->events |= COMEDI_CB_EOA;
- } else if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0) { /* stop_src TRIG_COUNT */
- das1800_cancel(dev, s); /* disable hardware conversions */
- async->events |= COMEDI_CB_EOA;
- }
-
- comedi_event(dev, s);
-
- return;
-}
-
-static void das1800_handle_dma(struct comedi_device *dev,
- struct comedi_subdevice *s, unsigned int status)
-{
- unsigned long flags;
- const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL;
-
- flags = claim_dma_lock();
- das1800_flush_dma_channel(dev, s, devpriv->dma_current,
- devpriv->dma_current_buf);
- /* re-enable dma channel */
- set_dma_addr(devpriv->dma_current,
- virt_to_bus(devpriv->dma_current_buf));
- set_dma_count(devpriv->dma_current, devpriv->dma_transfer_size);
- enable_dma(devpriv->dma_current);
- release_dma_lock(flags);
-
- if (status & DMATC) {
- /* clear DMATC interrupt bit */
- outb(CLEAR_INTR_MASK & ~DMATC, dev->iobase + DAS1800_STATUS);
- /* switch dma channels for next time, if appropriate */
- if (dual_dma) {
- /* read data from the other channel next time */
- if (devpriv->dma_current == devpriv->dma0) {
- devpriv->dma_current = devpriv->dma1;
- devpriv->dma_current_buf = devpriv->ai_buf1;
- } else {
- devpriv->dma_current = devpriv->dma0;
- devpriv->dma_current_buf = devpriv->ai_buf0;
- }
- }
- }
-
- return;
-}
-
static inline uint16_t munge_bipolar_sample(const struct comedi_device *dev,
uint16_t sample)
{
@@ -1023,6 +498,50 @@ static void munge_data(struct comedi_device *dev, uint16_t * array,
}
}
+static void das1800_handle_fifo_half_full(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ int numPoints = 0; /* number of points to read */
+ struct comedi_cmd *cmd = &s->async->cmd;
+
+ numPoints = FIFO_SIZE / 2;
+ /* if we only need some of the points */
+ if (cmd->stop_src == TRIG_COUNT && devpriv->count < numPoints)
+ numPoints = devpriv->count;
+ insw(dev->iobase + DAS1800_FIFO, devpriv->ai_buf0, numPoints);
+ munge_data(dev, devpriv->ai_buf0, numPoints);
+ cfc_write_array_to_buffer(s, devpriv->ai_buf0,
+ numPoints * sizeof(devpriv->ai_buf0[0]));
+ if (cmd->stop_src == TRIG_COUNT)
+ devpriv->count -= numPoints;
+ return;
+}
+
+static void das1800_handle_fifo_not_empty(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ short dpnt;
+ int unipolar;
+ struct comedi_cmd *cmd = &s->async->cmd;
+
+ unipolar = inb(dev->iobase + DAS1800_CONTROL_C) & UB;
+
+ while (inb(dev->iobase + DAS1800_STATUS) & FNE) {
+ if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0)
+ break;
+ dpnt = inw(dev->iobase + DAS1800_FIFO);
+ /* convert to unsigned type if we are in a bipolar mode */
+ if (!unipolar)
+ ;
+ dpnt = munge_bipolar_sample(dev, dpnt);
+ cfc_write_to_buffer(s, dpnt);
+ if (cmd->stop_src == TRIG_COUNT)
+ devpriv->count--;
+ }
+
+ return;
+}
+
/* Utility function used by das1800_flush_dma() and das1800_handle_dma().
* Assumes dma lock is held */
static void das1800_flush_dma_channel(struct comedi_device *dev,
@@ -1087,45 +606,36 @@ static void das1800_flush_dma(struct comedi_device *dev,
return;
}
-static void das1800_handle_fifo_half_full(struct comedi_device *dev,
- struct comedi_subdevice *s)
+static void das1800_handle_dma(struct comedi_device *dev,
+ struct comedi_subdevice *s, unsigned int status)
{
- int numPoints = 0; /* number of points to read */
- struct comedi_cmd *cmd = &s->async->cmd;
+ unsigned long flags;
+ const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL;
- numPoints = FIFO_SIZE / 2;
- /* if we only need some of the points */
- if (cmd->stop_src == TRIG_COUNT && devpriv->count < numPoints)
- numPoints = devpriv->count;
- insw(dev->iobase + DAS1800_FIFO, devpriv->ai_buf0, numPoints);
- munge_data(dev, devpriv->ai_buf0, numPoints);
- cfc_write_array_to_buffer(s, devpriv->ai_buf0,
- numPoints * sizeof(devpriv->ai_buf0[0]));
- if (cmd->stop_src == TRIG_COUNT)
- devpriv->count -= numPoints;
- return;
-}
+ flags = claim_dma_lock();
+ das1800_flush_dma_channel(dev, s, devpriv->dma_current,
+ devpriv->dma_current_buf);
+ /* re-enable dma channel */
+ set_dma_addr(devpriv->dma_current,
+ virt_to_bus(devpriv->dma_current_buf));
+ set_dma_count(devpriv->dma_current, devpriv->dma_transfer_size);
+ enable_dma(devpriv->dma_current);
+ release_dma_lock(flags);
-static void das1800_handle_fifo_not_empty(struct comedi_device *dev,
- struct comedi_subdevice *s)
-{
- short dpnt;
- int unipolar;
- struct comedi_cmd *cmd = &s->async->cmd;
-
- unipolar = inb(dev->iobase + DAS1800_CONTROL_C) & UB;
-
- while (inb(dev->iobase + DAS1800_STATUS) & FNE) {
- if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0)
- break;
- dpnt = inw(dev->iobase + DAS1800_FIFO);
- /* convert to unsigned type if we are in a bipolar mode */
- if (!unipolar)
- ;
- dpnt = munge_bipolar_sample(dev, dpnt);
- cfc_write_to_buffer(s, dpnt);
- if (cmd->stop_src == TRIG_COUNT)
- devpriv->count--;
+ if (status & DMATC) {
+ /* clear DMATC interrupt bit */
+ outb(CLEAR_INTR_MASK & ~DMATC, dev->iobase + DAS1800_STATUS);
+ /* switch dma channels for next time, if appropriate */
+ if (dual_dma) {
+ /* read data from the other channel next time */
+ if (devpriv->dma_current == devpriv->dma0) {
+ devpriv->dma_current = devpriv->dma1;
+ devpriv->dma_current_buf = devpriv->ai_buf1;
+ } else {
+ devpriv->dma_current = devpriv->dma0;
+ devpriv->dma_current_buf = devpriv->ai_buf0;
+ }
+ }
}
return;
@@ -1143,6 +653,131 @@ static int das1800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
return 0;
}
+/* the guts of the interrupt handler, that is shared with das1800_ai_poll */
+static void das1800_ai_handler(struct comedi_device *dev)
+{
+ struct comedi_subdevice *s = dev->subdevices + 0; /* analog input subdevice */
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+ unsigned int status = inb(dev->iobase + DAS1800_STATUS);
+
+ async->events = 0;
+ /* select adc for base address + 0 */
+ outb(ADC, dev->iobase + DAS1800_SELECT);
+ /* dma buffer full */
+ if (devpriv->irq_dma_bits & DMA_ENABLED) {
+ /* look for data from dma transfer even if dma terminal count hasn't happened yet */
+ das1800_handle_dma(dev, s, status);
+ } else if (status & FHF) { /* if fifo half full */
+ das1800_handle_fifo_half_full(dev, s);
+ } else if (status & FNE) { /* if fifo not empty */
+ das1800_handle_fifo_not_empty(dev, s);
+ }
+
+ async->events |= COMEDI_CB_BLOCK;
+ /* if the card's fifo has overflowed */
+ if (status & OVF) {
+ /* clear OVF interrupt bit */
+ outb(CLEAR_INTR_MASK & ~OVF, dev->iobase + DAS1800_STATUS);
+ comedi_error(dev, "DAS1800 FIFO overflow");
+ das1800_cancel(dev, s);
+ async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
+ comedi_event(dev, s);
+ return;
+ }
+ /* stop taking data if appropriate */
+ /* stop_src TRIG_EXT */
+ if (status & CT0TC) {
+ /* clear CT0TC interrupt bit */
+ outb(CLEAR_INTR_MASK & ~CT0TC, dev->iobase + DAS1800_STATUS);
+ /* make sure we get all remaining data from board before quitting */
+ if (devpriv->irq_dma_bits & DMA_ENABLED)
+ das1800_flush_dma(dev, s);
+ else
+ das1800_handle_fifo_not_empty(dev, s);
+ das1800_cancel(dev, s); /* disable hardware conversions */
+ async->events |= COMEDI_CB_EOA;
+ } else if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0) { /* stop_src TRIG_COUNT */
+ das1800_cancel(dev, s); /* disable hardware conversions */
+ async->events |= COMEDI_CB_EOA;
+ }
+
+ comedi_event(dev, s);
+
+ return;
+}
+
+static int das1800_ai_poll(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ unsigned long flags;
+
+ /* prevent race with interrupt handler */
+ spin_lock_irqsave(&dev->spinlock, flags);
+ das1800_ai_handler(dev);
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+
+ return s->async->buf_write_count - s->async->buf_read_count;
+}
+
+static irqreturn_t das1800_interrupt(int irq, void *d)
+{
+ struct comedi_device *dev = d;
+ unsigned int status;
+
+ if (dev->attached == 0) {
+ comedi_error(dev, "premature interrupt");
+ return IRQ_HANDLED;
+ }
+
+ /* Prevent race with das1800_ai_poll() on multi processor systems.
+ * Also protects indirect addressing in das1800_ai_handler */
+ spin_lock(&dev->spinlock);
+ status = inb(dev->iobase + DAS1800_STATUS);
+
+ /* if interrupt was not caused by das-1800 */
+ if (!(status & INT)) {
+ spin_unlock(&dev->spinlock);
+ return IRQ_NONE;
+ }
+ /* clear the interrupt status bit INT */
+ outb(CLEAR_INTR_MASK & ~INT, dev->iobase + DAS1800_STATUS);
+ /* handle interrupt */
+ das1800_ai_handler(dev);
+
+ spin_unlock(&dev->spinlock);
+ return IRQ_HANDLED;
+}
+
+/* converts requested conversion timing to timing compatible with
+ * hardware, used only when card is in 'burst mode'
+ */
+static unsigned int burst_convert_arg(unsigned int convert_arg, int round_mode)
+{
+ unsigned int micro_sec;
+
+ /* in burst mode, the maximum conversion time is 64 microseconds */
+ if (convert_arg > 64000)
+ convert_arg = 64000;
+
+ /* the conversion time must be an integral number of microseconds */
+ switch (round_mode) {
+ case TRIG_ROUND_NEAREST:
+ default:
+ micro_sec = (convert_arg + 500) / 1000;
+ break;
+ case TRIG_ROUND_DOWN:
+ micro_sec = convert_arg / 1000;
+ break;
+ case TRIG_ROUND_UP:
+ micro_sec = (convert_arg - 1) / 1000 + 1;
+ break;
+ }
+
+ /* return number of nanoseconds */
+ return micro_sec * 1000;
+}
+
/* test analog input cmd */
static int das1800_ai_do_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s,
@@ -1322,10 +957,6 @@ static int das1800_ai_do_cmdtest(struct comedi_device *dev,
return 0;
}
-/* analog input cmd interface */
-
-/* first, some utility functions used in the main ai_do_cmd() */
-
/* returns appropriate bits for control register a, depending on command */
static int control_a_bits(struct comedi_cmd cmd)
{
@@ -1396,6 +1027,25 @@ static int control_c_bits(struct comedi_cmd cmd)
return control_c;
}
+/* loads counters with divisor1, divisor2 from private structure */
+static int das1800_set_frequency(struct comedi_device *dev)
+{
+ int err = 0;
+
+ /* counter 1, mode 2 */
+ if (i8254_load(dev->iobase + DAS1800_COUNTER, 0, 1, devpriv->divisor1,
+ 2))
+ err++;
+ /* counter 2, mode 2 */
+ if (i8254_load(dev->iobase + DAS1800_COUNTER, 0, 2, devpriv->divisor2,
+ 2))
+ err++;
+ if (err)
+ return -1;
+
+ return 0;
+}
+
/* sets up counters */
static int setup_counters(struct comedi_device *dev, struct comedi_cmd cmd)
{
@@ -1436,6 +1086,44 @@ static int setup_counters(struct comedi_device *dev, struct comedi_cmd cmd)
return 0;
}
+/* utility function that suggests a dma transfer size based on the conversion period 'ns' */
+static unsigned int suggest_transfer_size(struct comedi_cmd *cmd)
+{
+ unsigned int size = DMA_BUF_SIZE;
+ static const int sample_size = 2; /* size in bytes of one sample from board */
+ unsigned int fill_time = 300000000; /* target time in nanoseconds for filling dma buffer */
+ unsigned int max_size; /* maximum size we will allow for a transfer */
+
+ /* make dma buffer fill in 0.3 seconds for timed modes */
+ switch (cmd->scan_begin_src) {
+ case TRIG_FOLLOW: /* not in burst mode */
+ if (cmd->convert_src == TRIG_TIMER)
+ size = (fill_time / cmd->convert_arg) * sample_size;
+ break;
+ case TRIG_TIMER:
+ size = (fill_time / (cmd->scan_begin_arg * cmd->chanlist_len)) *
+ sample_size;
+ break;
+ default:
+ size = DMA_BUF_SIZE;
+ break;
+ }
+
+ /* set a minimum and maximum size allowed */
+ max_size = DMA_BUF_SIZE;
+ /* if we are taking limited number of conversions, limit transfer size to that */
+ if (cmd->stop_src == TRIG_COUNT &&
+ cmd->stop_arg * cmd->chanlist_len * sample_size < max_size)
+ max_size = cmd->stop_arg * cmd->chanlist_len * sample_size;
+
+ if (size > max_size)
+ size = max_size;
+ if (size < sample_size)
+ size = sample_size;
+
+ return size;
+}
+
/* sets up dma */
static void setup_dma(struct comedi_device *dev, struct comedi_cmd cmd)
{
@@ -1689,91 +1377,357 @@ static int das1800_do_wbits(struct comedi_device *dev,
return 2;
}
-/* loads counters with divisor1, divisor2 from private structure */
-static int das1800_set_frequency(struct comedi_device *dev)
+static int das1800_init_dma(struct comedi_device *dev, unsigned int dma0,
+ unsigned int dma1)
{
- int err = 0;
-
- /* counter 1, mode 2 */
- if (i8254_load(dev->iobase + DAS1800_COUNTER, 0, 1, devpriv->divisor1,
- 2))
- err++;
- /* counter 2, mode 2 */
- if (i8254_load(dev->iobase + DAS1800_COUNTER, 0, 2, devpriv->divisor2,
- 2))
- err++;
- if (err)
- return -1;
+ unsigned long flags;
+ /* need an irq to do dma */
+ if (dev->irq && dma0) {
+ /* encode dma0 and dma1 into 2 digit hexadecimal for switch */
+ switch ((dma0 & 0x7) | (dma1 << 4)) {
+ case 0x5: /* dma0 == 5 */
+ devpriv->dma_bits |= DMA_CH5;
+ break;
+ case 0x6: /* dma0 == 6 */
+ devpriv->dma_bits |= DMA_CH6;
+ break;
+ case 0x7: /* dma0 == 7 */
+ devpriv->dma_bits |= DMA_CH7;
+ break;
+ case 0x65: /* dma0 == 5, dma1 == 6 */
+ devpriv->dma_bits |= DMA_CH5_CH6;
+ break;
+ case 0x76: /* dma0 == 6, dma1 == 7 */
+ devpriv->dma_bits |= DMA_CH6_CH7;
+ break;
+ case 0x57: /* dma0 == 7, dma1 == 5 */
+ devpriv->dma_bits |= DMA_CH7_CH5;
+ break;
+ default:
+ dev_err(dev->hw_dev, " only supports dma channels 5 through 7\n"
+ " Dual dma only allows the following combinations:\n"
+ " dma 5,6 / 6,7 / or 7,5\n");
+ return -EINVAL;
+ break;
+ }
+ if (request_dma(dma0, dev->driver->driver_name)) {
+ dev_err(dev->hw_dev, "failed to allocate dma channel %i\n",
+ dma0);
+ return -EINVAL;
+ }
+ devpriv->dma0 = dma0;
+ devpriv->dma_current = dma0;
+ if (dma1) {
+ if (request_dma(dma1, dev->driver->driver_name)) {
+ dev_err(dev->hw_dev, "failed to allocate dma channel %i\n",
+ dma1);
+ return -EINVAL;
+ }
+ devpriv->dma1 = dma1;
+ }
+ devpriv->ai_buf0 = kmalloc(DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA);
+ if (devpriv->ai_buf0 == NULL)
+ return -ENOMEM;
+ devpriv->dma_current_buf = devpriv->ai_buf0;
+ if (dma1) {
+ devpriv->ai_buf1 =
+ kmalloc(DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA);
+ if (devpriv->ai_buf1 == NULL)
+ return -ENOMEM;
+ }
+ flags = claim_dma_lock();
+ disable_dma(devpriv->dma0);
+ set_dma_mode(devpriv->dma0, DMA_MODE_READ);
+ if (dma1) {
+ disable_dma(devpriv->dma1);
+ set_dma_mode(devpriv->dma1, DMA_MODE_READ);
+ }
+ release_dma_lock(flags);
+ }
return 0;
}
-/* converts requested conversion timing to timing compatible with
- * hardware, used only when card is in 'burst mode'
- */
-static unsigned int burst_convert_arg(unsigned int convert_arg, int round_mode)
+static int das1800_probe(struct comedi_device *dev)
{
- unsigned int micro_sec;
+ int id;
+ int board;
- /* in burst mode, the maximum conversion time is 64 microseconds */
- if (convert_arg > 64000)
- convert_arg = 64000;
+ id = (inb(dev->iobase + DAS1800_DIGITAL) >> 4) & 0xf; /* get id bits */
+ board = ((struct das1800_board *)dev->board_ptr) - das1800_boards;
- /* the conversion time must be an integral number of microseconds */
- switch (round_mode) {
- case TRIG_ROUND_NEAREST:
- default:
- micro_sec = (convert_arg + 500) / 1000;
+ switch (id) {
+ case 0x3:
+ if (board == das1801st_da || board == das1802st_da ||
+ board == das1701st_da || board == das1702st_da) {
+ dev_dbg(dev->hw_dev, "Board model: %s\n",
+ das1800_boards[board].name);
+ return board;
+ }
+ printk
+ (" Board model (probed, not recommended): das-1800st-da series\n");
+ return das1801st;
+ break;
+ case 0x4:
+ if (board == das1802hr_da || board == das1702hr_da) {
+ dev_dbg(dev->hw_dev, "Board model: %s\n",
+ das1800_boards[board].name);
+ return board;
+ }
+ printk
+ (" Board model (probed, not recommended): das-1802hr-da\n");
+ return das1802hr;
+ break;
+ case 0x5:
+ if (board == das1801ao || board == das1802ao ||
+ board == das1701ao || board == das1702ao) {
+ dev_dbg(dev->hw_dev, "Board model: %s\n",
+ das1800_boards[board].name);
+ return board;
+ }
+ printk
+ (" Board model (probed, not recommended): das-1800ao series\n");
+ return das1801ao;
+ break;
+ case 0x6:
+ if (board == das1802hr || board == das1702hr) {
+ dev_dbg(dev->hw_dev, "Board model: %s\n",
+ das1800_boards[board].name);
+ return board;
+ }
+ printk
+ (" Board model (probed, not recommended): das-1802hr\n");
+ return das1802hr;
break;
- case TRIG_ROUND_DOWN:
- micro_sec = convert_arg / 1000;
+ case 0x7:
+ if (board == das1801st || board == das1802st ||
+ board == das1701st || board == das1702st) {
+ dev_dbg(dev->hw_dev, "Board model: %s\n",
+ das1800_boards[board].name);
+ return board;
+ }
+ printk
+ (" Board model (probed, not recommended): das-1800st series\n");
+ return das1801st;
break;
- case TRIG_ROUND_UP:
- micro_sec = (convert_arg - 1) / 1000 + 1;
+ case 0x8:
+ if (board == das1801hc || board == das1802hc) {
+ dev_dbg(dev->hw_dev, "Board model: %s\n",
+ das1800_boards[board].name);
+ return board;
+ }
+ printk
+ (" Board model (probed, not recommended): das-1800hc series\n");
+ return das1801hc;
+ break;
+ default:
+ printk
+ (" Board model: probe returned 0x%x (unknown, please report)\n",
+ id);
+ return board;
break;
}
-
- /* return number of nanoseconds */
- return micro_sec * 1000;
+ return -1;
}
-/* utility function that suggests a dma transfer size based on the conversion period 'ns' */
-static unsigned int suggest_transfer_size(struct comedi_cmd *cmd)
+static int das1800_attach(struct comedi_device *dev,
+ struct comedi_devconfig *it)
{
- unsigned int size = DMA_BUF_SIZE;
- static const int sample_size = 2; /* size in bytes of one sample from board */
- unsigned int fill_time = 300000000; /* target time in nanoseconds for filling dma buffer */
- unsigned int max_size; /* maximum size we will allow for a transfer */
+ struct comedi_subdevice *s;
+ unsigned long iobase = it->options[0];
+ unsigned int irq = it->options[1];
+ unsigned int dma0 = it->options[2];
+ unsigned int dma1 = it->options[3];
+ unsigned long iobase2;
+ int board;
+ int retval;
+
+ /* allocate and initialize dev->private */
+ if (alloc_private(dev, sizeof(struct das1800_private)) < 0)
+ return -ENOMEM;
+
+ printk(KERN_DEBUG "comedi%d: %s: io 0x%lx", dev->minor,
+ dev->driver->driver_name, iobase);
+ if (irq) {
+ printk(KERN_CONT ", irq %u", irq);
+ if (dma0) {
+ printk(KERN_CONT ", dma %u", dma0);
+ if (dma1)
+ printk(KERN_CONT " and %u", dma1);
+ }
+ }
+ printk(KERN_CONT "\n");
+
+ if (iobase == 0) {
+ dev_err(dev->hw_dev, "io base address required\n");
+ return -EINVAL;
+ }
+
+ /* check if io addresses are available */
+ if (!request_region(iobase, DAS1800_SIZE, dev->driver->driver_name)) {
+ printk
+ (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n",
+ iobase, iobase + DAS1800_SIZE - 1);
+ return -EIO;
+ }
+ dev->iobase = iobase;
+
+ board = das1800_probe(dev);
+ if (board < 0) {
+ dev_err(dev->hw_dev, "unable to determine board type\n");
+ return -ENODEV;
+ }
+
+ dev->board_ptr = das1800_boards + board;
+ dev->board_name = thisboard->name;
+
+ /* if it is an 'ao' board with fancy analog out then we need extra io ports */
+ if (thisboard->ao_ability == 2) {
+ iobase2 = iobase + IOBASE2;
+ if (!request_region(iobase2, DAS1800_SIZE,
+ dev->driver->driver_name)) {
+ printk
+ (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n",
+ iobase2, iobase2 + DAS1800_SIZE - 1);
+ return -EIO;
+ }
+ devpriv->iobase2 = iobase2;
+ }
+
+ /* grab our IRQ */
+ if (irq) {
+ if (request_irq(irq, das1800_interrupt, 0,
+ dev->driver->driver_name, dev)) {
+ dev_dbg(dev->hw_dev, "unable to allocate irq %u\n",
+ irq);
+ return -EINVAL;
+ }
+ }
+ dev->irq = irq;
- /* make dma buffer fill in 0.3 seconds for timed modes */
- switch (cmd->scan_begin_src) {
- case TRIG_FOLLOW: /* not in burst mode */
- if (cmd->convert_src == TRIG_TIMER)
- size = (fill_time / cmd->convert_arg) * sample_size;
+ /* set bits that tell card which irq to use */
+ switch (irq) {
+ case 0:
+ break;
+ case 3:
+ devpriv->irq_dma_bits |= 0x8;
+ break;
+ case 5:
+ devpriv->irq_dma_bits |= 0x10;
+ break;
+ case 7:
+ devpriv->irq_dma_bits |= 0x18;
+ break;
+ case 10:
+ devpriv->irq_dma_bits |= 0x28;
+ break;
+ case 11:
+ devpriv->irq_dma_bits |= 0x30;
break;
- case TRIG_TIMER:
- size = (fill_time / (cmd->scan_begin_arg * cmd->chanlist_len)) *
- sample_size;
+ case 15:
+ devpriv->irq_dma_bits |= 0x38;
break;
default:
- size = DMA_BUF_SIZE;
+ dev_err(dev->hw_dev, "irq out of range\n");
+ return -EINVAL;
break;
}
- /* set a minimum and maximum size allowed */
- max_size = DMA_BUF_SIZE;
- /* if we are taking limited number of conversions, limit transfer size to that */
- if (cmd->stop_src == TRIG_COUNT &&
- cmd->stop_arg * cmd->chanlist_len * sample_size < max_size)
- max_size = cmd->stop_arg * cmd->chanlist_len * sample_size;
+ retval = das1800_init_dma(dev, dma0, dma1);
+ if (retval < 0)
+ return retval;
- if (size > max_size)
- size = max_size;
- if (size < sample_size)
- size = sample_size;
+ if (devpriv->ai_buf0 == NULL) {
+ devpriv->ai_buf0 =
+ kmalloc(FIFO_SIZE * sizeof(uint16_t), GFP_KERNEL);
+ if (devpriv->ai_buf0 == NULL)
+ return -ENOMEM;
+ }
- return size;
-}
+ if (alloc_subdevices(dev, 4) < 0)
+ return -ENOMEM;
+
+ /* analog input subdevice */
+ s = dev->subdevices + 0;
+ dev->read_subdev = s;
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_GROUND | SDF_CMD_READ;
+ if (thisboard->common)
+ s->subdev_flags |= SDF_COMMON;
+ s->n_chan = thisboard->qram_len;
+ s->len_chanlist = thisboard->qram_len;
+ s->maxdata = (1 << thisboard->resolution) - 1;
+ s->range_table = thisboard->range_ai;
+ s->do_cmd = das1800_ai_do_cmd;
+ s->do_cmdtest = das1800_ai_do_cmdtest;
+ s->insn_read = das1800_ai_rinsn;
+ s->poll = das1800_ai_poll;
+ s->cancel = das1800_cancel;
+
+ /* analog out */
+ s = dev->subdevices + 1;
+ if (thisboard->ao_ability == 1) {
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = thisboard->ao_n_chan;
+ s->maxdata = (1 << thisboard->resolution) - 1;
+ s->range_table = &range_ao_1;
+ s->insn_write = das1800_ao_winsn;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ /* di */
+ s = dev->subdevices + 2;
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 4;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = das1800_di_rbits;
+
+ /* do */
+ s = dev->subdevices + 3;
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
+ s->n_chan = thisboard->do_n_chan;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = das1800_do_wbits;
+
+ das1800_cancel(dev, dev->read_subdev);
+
+ /* initialize digital out channels */
+ outb(devpriv->do_bits, dev->iobase + DAS1800_DIGITAL);
+
+ /* initialize analog out channels */
+ if (thisboard->ao_ability == 1) {
+ /* select 'update' dac channel for baseAddress + 0x0 */
+ outb(DAC(thisboard->ao_n_chan - 1),
+ dev->iobase + DAS1800_SELECT);
+ outw(devpriv->ao_update_bits, dev->iobase + DAS1800_DAC);
+ }
+
+ return 0;
+};
+
+static void das1800_detach(struct comedi_device *dev)
+{
+ if (dev->iobase)
+ release_region(dev->iobase, DAS1800_SIZE);
+ if (dev->irq)
+ free_irq(dev->irq, dev);
+ if (dev->private) {
+ if (devpriv->iobase2)
+ release_region(devpriv->iobase2, DAS1800_SIZE);
+ if (devpriv->dma0)
+ free_dma(devpriv->dma0);
+ if (devpriv->dma1)
+ free_dma(devpriv->dma1);
+ kfree(devpriv->ai_buf0);
+ kfree(devpriv->ai_buf1);
+ }
+};
static struct comedi_driver das1800_driver = {
.driver_name = "das1800",
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