Currently all the drivers that use the mite driver have to call
mite_setup() after allocating and initializing the mite device
with mite_attach().
Move the mite_setup() call into mite_attach() to simplify the
drivers a bit and remove the need for the additional inline and
exported functions.
For aesthetics, move mite_setup2(), and rename it to mite_setup(),
so it's near mite_attach().
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/mite.c | 183 +++++++++++++++--------------
drivers/staging/comedi/drivers/mite.h | 10 +-
drivers/staging/comedi/drivers/ni_660x.c | 6 +-
drivers/staging/comedi/drivers/ni_pcidio.c | 6 +-
drivers/staging/comedi/drivers/ni_pcimio.c | 6 +-
5 files changed, 101 insertions(+), 110 deletions(-)
diff --git a/drivers/staging/comedi/drivers/mite.c
b/drivers/staging/comedi/drivers/mite.c
index f64c5df..08e9c8b 100644
--- a/drivers/staging/comedi/drivers/mite.c
+++ b/drivers/staging/comedi/drivers/mite.c
@@ -245,82 +245,6 @@ static unsigned int mite_fifo_size(struct mite *mite,
unsigned int channel)
return empty_count + full_count;
}
-int mite_setup2(struct comedi_device *dev,
- struct mite *mite, bool use_win1)
-{
- resource_size_t daq_phys_addr;
- unsigned long length;
- int i;
- u32 csigr_bits;
- unsigned int unknown_dma_burst_bits;
-
- pci_set_master(mite->pcidev);
-
- mite->mmio = pci_ioremap_bar(mite->pcidev, 0);
- if (!mite->mmio) {
- dev_err(dev->class_dev,
- "Failed to remap mite io memory address\n");
- return -ENOMEM;
- }
-
- dev->mmio = pci_ioremap_bar(mite->pcidev, 1);
- if (!dev->mmio) {
- dev_err(dev->class_dev,
- "Failed to remap daq io memory address\n");
- return -ENOMEM;
- }
- daq_phys_addr = pci_resource_start(mite->pcidev, 1);
- length = pci_resource_len(mite->pcidev, 1);
-
- if (use_win1) {
- writel(0, mite->mmio + MITE_IODWBSR);
- dev_info(dev->class_dev,
- "using I/O Window Base Size register 1\n");
- writel(daq_phys_addr | WENAB |
- MITE_IODWBSR_1_WSIZE_bits(length),
- mite->mmio + MITE_IODWBSR_1);
- writel(0, mite->mmio + MITE_IODWCR_1);
- } else {
- writel(daq_phys_addr | WENAB, mite->mmio + MITE_IODWBSR);
- }
- /*
- * Make sure dma bursts work. I got this from running a bus analyzer
- * on a pxi-6281 and a pxi-6713. 6713 powered up with register value
- * of 0x61f and bursts worked. 6281 powered up with register value of
- * 0x1f and bursts didn't work. The NI windows driver reads the
- * register, then does a bitwise-or of 0x600 with it and writes it back.
- *
- * The bits 0x90180700 in MITE_UNKNOWN_DMA_BURST_REG can be
- * written and read back. The bits 0x1f always read as 1.
- * The rest always read as zero.
- */
- unknown_dma_burst_bits = readl(mite->mmio + MITE_UNKNOWN_DMA_BURST_REG);
- unknown_dma_burst_bits |= UNKNOWN_DMA_BURST_ENABLE_BITS;
- writel(unknown_dma_burst_bits, mite->mmio + MITE_UNKNOWN_DMA_BURST_REG);
-
- csigr_bits = readl(mite->mmio + MITE_CSIGR);
- mite->num_channels = CSIGR_TO_DMAC(csigr_bits);
- if (mite->num_channels > MAX_MITE_DMA_CHANNELS) {
- dev_warn(dev->class_dev,
- "mite: bug? chip claims to have %i dma channels.
Setting to %i.\n",
- mite->num_channels, MAX_MITE_DMA_CHANNELS);
- mite->num_channels = MAX_MITE_DMA_CHANNELS;
- }
- dump_chip_signature(csigr_bits);
- for (i = 0; i < mite->num_channels; i++) {
- writel(CHOR_DMARESET, mite->mmio + MITE_CHOR(i));
- /* disable interrupts */
- writel(CHCR_CLR_DMA_IE | CHCR_CLR_LINKP_IE | CHCR_CLR_SAR_IE |
- CHCR_CLR_DONE_IE | CHCR_CLR_MRDY_IE | CHCR_CLR_DRDY_IE |
- CHCR_CLR_LC_IE | CHCR_CLR_CONT_RB_IE,
- mite->mmio + MITE_CHCR(i));
- }
- mite->fifo_size = mite_fifo_size(mite, 0);
- dev_info(dev->class_dev, "fifo size is %i.\n", mite->fifo_size);
- return 0;
-}
-EXPORT_SYMBOL_GPL(mite_setup2);
-
struct mite_ring *mite_alloc_ring(struct mite *mite)
{
struct mite_ring *ring;
@@ -807,31 +731,118 @@ int mite_done(struct mite_channel *mite_chan)
}
EXPORT_SYMBOL_GPL(mite_done);
+static int mite_setup(struct comedi_device *dev, struct mite *mite,
+ bool use_win1)
+{
+ resource_size_t daq_phys_addr;
+ unsigned long length;
+ int i;
+ u32 csigr_bits;
+ unsigned int unknown_dma_burst_bits;
+
+ pci_set_master(mite->pcidev);
+
+ mite->mmio = pci_ioremap_bar(mite->pcidev, 0);
+ if (!mite->mmio) {
+ dev_err(dev->class_dev,
+ "Failed to remap mite io memory address\n");
+ return -ENOMEM;
+ }
+
+ dev->mmio = pci_ioremap_bar(mite->pcidev, 1);
+ if (!dev->mmio) {
+ dev_err(dev->class_dev,
+ "Failed to remap daq io memory address\n");
+ return -ENOMEM;
+ }
+ daq_phys_addr = pci_resource_start(mite->pcidev, 1);
+ length = pci_resource_len(mite->pcidev, 1);
+
+ if (use_win1) {
+ writel(0, mite->mmio + MITE_IODWBSR);
+ dev_info(dev->class_dev,
+ "using I/O Window Base Size register 1\n");
+ writel(daq_phys_addr | WENAB |
+ MITE_IODWBSR_1_WSIZE_bits(length),
+ mite->mmio + MITE_IODWBSR_1);
+ writel(0, mite->mmio + MITE_IODWCR_1);
+ } else {
+ writel(daq_phys_addr | WENAB, mite->mmio + MITE_IODWBSR);
+ }
+ /*
+ * Make sure dma bursts work. I got this from running a bus analyzer
+ * on a pxi-6281 and a pxi-6713. 6713 powered up with register value
+ * of 0x61f and bursts worked. 6281 powered up with register value of
+ * 0x1f and bursts didn't work. The NI windows driver reads the
+ * register, then does a bitwise-or of 0x600 with it and writes it back.
+ *
+ * The bits 0x90180700 in MITE_UNKNOWN_DMA_BURST_REG can be
+ * written and read back. The bits 0x1f always read as 1.
+ * The rest always read as zero.
+ */
+ unknown_dma_burst_bits = readl(mite->mmio + MITE_UNKNOWN_DMA_BURST_REG);
+ unknown_dma_burst_bits |= UNKNOWN_DMA_BURST_ENABLE_BITS;
+ writel(unknown_dma_burst_bits, mite->mmio + MITE_UNKNOWN_DMA_BURST_REG);
+
+ csigr_bits = readl(mite->mmio + MITE_CSIGR);
+ mite->num_channels = CSIGR_TO_DMAC(csigr_bits);
+ if (mite->num_channels > MAX_MITE_DMA_CHANNELS) {
+ dev_warn(dev->class_dev,
+ "mite: bug? chip claims to have %i dma channels.
Setting to %i.\n",
+ mite->num_channels, MAX_MITE_DMA_CHANNELS);
+ mite->num_channels = MAX_MITE_DMA_CHANNELS;
+ }
+ dump_chip_signature(csigr_bits);
+ for (i = 0; i < mite->num_channels; i++) {
+ writel(CHOR_DMARESET, mite->mmio + MITE_CHOR(i));
+ /* disable interrupts */
+ writel(CHCR_CLR_DMA_IE | CHCR_CLR_LINKP_IE | CHCR_CLR_SAR_IE |
+ CHCR_CLR_DONE_IE | CHCR_CLR_MRDY_IE | CHCR_CLR_DRDY_IE |
+ CHCR_CLR_LC_IE | CHCR_CLR_CONT_RB_IE,
+ mite->mmio + MITE_CHCR(i));
+ }
+ mite->fifo_size = mite_fifo_size(mite, 0);
+ dev_info(dev->class_dev, "fifo size is %i.\n", mite->fifo_size);
+ return 0;
+}
+
/**
* mite_attach() - Allocate and initialize a MITE device for a comedi driver.
* @dev: COMEDI device.
+ * @use_win1: flag to use I/O Window 1 instead of I/O Window 0.
*
* Called by a COMEDI drivers (*auto_attach).
*
* Returns a pointer to the MITE device on success, or NULL if the MITE cannot
- * be allocated.
+ * be allocated or remapped.
*/
-struct mite *mite_attach(struct comedi_device *dev)
+struct mite *mite_attach(struct comedi_device *dev, bool use_win1)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
struct mite *mite;
unsigned int i;
+ int ret;
mite = kzalloc(sizeof(*mite), GFP_KERNEL);
- if (mite) {
- spin_lock_init(&mite->lock);
- mite->pcidev = pcidev;
- for (i = 0; i < MAX_MITE_DMA_CHANNELS; ++i) {
- mite->channels[i].mite = mite;
- mite->channels[i].channel = i;
- mite->channels[i].done = 1;
- }
+ if (!mite)
+ return NULL;
+
+ spin_lock_init(&mite->lock);
+ mite->pcidev = pcidev;
+ for (i = 0; i < MAX_MITE_DMA_CHANNELS; ++i) {
+ mite->channels[i].mite = mite;
+ mite->channels[i].channel = i;
+ mite->channels[i].done = 1;
}
+
+ ret = mite_setup(dev, mite, use_win1);
+ if (ret) {
+ if (mite->mmio)
+ iounmap(mite->mmio);
+ kfree(mite);
+ return NULL;
+ }
+
return mite;
}
EXPORT_SYMBOL_GPL(mite_attach);
diff --git a/drivers/staging/comedi/drivers/mite.h
b/drivers/staging/comedi/drivers/mite.h
index d2643e4..95b645e 100644
--- a/drivers/staging/comedi/drivers/mite.h
+++ b/drivers/staging/comedi/drivers/mite.h
@@ -60,14 +60,6 @@ struct mite {
spinlock_t lock;
};
-int mite_setup2(struct comedi_device *, struct mite *, bool use_win1);
-
-static inline int mite_setup(struct comedi_device *dev,
- struct mite *mite)
-{
- return mite_setup2(dev, mite, false);
-}
-
struct mite_ring *mite_alloc_ring(struct mite *);
void mite_free_ring(struct mite_ring *ring);
struct mite_channel *mite_request_channel_in_range(struct mite *,
@@ -98,7 +90,7 @@ int mite_buf_change(struct mite_ring *, struct
comedi_subdevice *);
int mite_init_ring_descriptors(struct mite_ring *, struct comedi_subdevice *,
unsigned int nbytes);
-struct mite *mite_attach(struct comedi_device *);
+struct mite *mite_attach(struct comedi_device *, bool use_win1);
void mite_detach(struct mite *);
/*
diff --git a/drivers/staging/comedi/drivers/ni_660x.c
b/drivers/staging/comedi/drivers/ni_660x.c
index de75598..0dcb826 100644
--- a/drivers/staging/comedi/drivers/ni_660x.c
+++ b/drivers/staging/comedi/drivers/ni_660x.c
@@ -724,14 +724,10 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
return ret;
devpriv = dev->private;
- devpriv->mite = mite_attach(dev);
+ devpriv->mite = mite_attach(dev, true); /* use win1 */
if (!devpriv->mite)
return -ENOMEM;
- ret = mite_setup2(dev, devpriv->mite, true);
- if (ret < 0)
- return ret;
-
ret = ni_660x_alloc_mite_rings(dev);
if (ret < 0)
return ret;
diff --git a/drivers/staging/comedi/drivers/ni_pcidio.c
b/drivers/staging/comedi/drivers/ni_pcidio.c
index 1e30792..02a5329 100644
--- a/drivers/staging/comedi/drivers/ni_pcidio.c
+++ b/drivers/staging/comedi/drivers/ni_pcidio.c
@@ -897,14 +897,10 @@ static int nidio_auto_attach(struct comedi_device *dev,
spin_lock_init(&devpriv->mite_channel_lock);
- devpriv->mite = mite_attach(dev);
+ devpriv->mite = mite_attach(dev, false); /* use win0 */
if (!devpriv->mite)
return -ENOMEM;
- ret = mite_setup(dev, devpriv->mite);
- if (ret < 0)
- return ret;
-
devpriv->di_mite_ring = mite_alloc_ring(devpriv->mite);
if (!devpriv->di_mite_ring)
return -ENOMEM;
diff --git a/drivers/staging/comedi/drivers/ni_pcimio.c
b/drivers/staging/comedi/drivers/ni_pcimio.c
index 0408ba3..344aa34 100644
--- a/drivers/staging/comedi/drivers/ni_pcimio.c
+++ b/drivers/staging/comedi/drivers/ni_pcimio.c
@@ -1172,7 +1172,7 @@ static int pcimio_auto_attach(struct comedi_device *dev,
return ret;
devpriv = dev->private;
- devpriv->mite = mite_attach(dev);
+ devpriv->mite = mite_attach(dev, false); /* use win0 */
if (!devpriv->mite)
return -ENOMEM;
@@ -1197,10 +1197,6 @@ static int pcimio_auto_attach(struct comedi_device *dev,
if (board->reg_type == ni_reg_6713)
devpriv->is_6713 = 1;
- ret = mite_setup(dev, devpriv->mite);
- if (ret < 0)
- return ret;
-
devpriv->ai_mite_ring = mite_alloc_ring(devpriv->mite);
if (!devpriv->ai_mite_ring)
return -ENOMEM;
--
2.6.3
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