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List: linux-driver-devel
Subject: [PATCH 09/10] staging: comedi: amplc_pci224: use attach_pci() hook
From: Ian Abbott <abbotti () mev ! co ! uk>
Date: 2012-03-30 16:15:04
Message-ID: 1333124105-30361-10-git-send-email-abbotti () mev ! co ! uk
[Download RAW message or body]
Change the amplc_pci224 driver to use the new attach_pci() hook in
struct comedi_driver to auto-configure probed PCI devices.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
---
drivers/staging/comedi/drivers/amplc_pci224.c | 145 +++++++++++++++++--------
1 files changed, 100 insertions(+), 45 deletions(-)
diff --git a/drivers/staging/comedi/drivers/amplc_pci224.c \
b/drivers/staging/comedi/drivers/amplc_pci224.c index 0f2cac2..fe65338 100644
--- a/drivers/staging/comedi/drivers/amplc_pci224.c
+++ b/drivers/staging/comedi/drivers/amplc_pci224.c
@@ -430,11 +430,14 @@ struct pci224_private {
static int pci224_attach(struct comedi_device *dev,
struct comedi_devconfig *it);
static int pci224_detach(struct comedi_device *dev);
+static int pci224_attach_pci(struct comedi_device *dev,
+ struct pci_dev *pci_dev);
static struct comedi_driver driver_amplc_pci224 = {
.driver_name = DRIVER_NAME,
.module = THIS_MODULE,
.attach = pci224_attach,
.detach = pci224_detach,
+ .attach_pci = pci224_attach_pci,
.board_name = &pci224_boards[0].name,
.offset = sizeof(struct pci224_board),
.num_names = ARRAY_SIZE(pci224_boards),
@@ -1312,6 +1315,20 @@ static irqreturn_t pci224_interrupt(int irq, void *d)
}
/*
+ * This function looks for a board matching the supplied PCI device.
+ */
+static const struct pci224_board
+*pci224_find_pci_board(struct pci_dev *pci_dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pci224_boards); i++)
+ if (pci_dev->device == pci224_boards[i].devid)
+ return &pci224_boards[i];
+ return NULL;
+}
+
+/*
* This function looks for a PCI device matching the requested board name,
* bus and slot.
*/
@@ -1336,17 +1353,12 @@ pci224_find_pci(struct comedi_device *dev, int bus, int slot,
}
if (thisboard->model == any_model) {
/* Match any supported model. */
- int i;
-
- for (i = 0; i < ARRAY_SIZE(pci224_boards); i++) {
- if (pci_dev->device == pci224_boards[i].devid) {
- /* Change board_ptr to matched board. */
- dev->board_ptr = &pci224_boards[i];
- break;
- }
- }
- if (i == ARRAY_SIZE(pci224_boards))
+ const struct pci224_board *board_ptr;
+ board_ptr = pci224_find_pci_board(pci_dev);
+ if (board_ptr == NULL)
continue;
+ /* Change board_ptr to matched board. */
+ dev->board_ptr = board_ptr;
} else {
/* Match specific model name. */
if (thisboard->devid != pci_dev->device)
@@ -1370,35 +1382,16 @@ pci224_find_pci(struct comedi_device *dev, int bus, int slot,
}
/*
- * Attach is called by the Comedi core to configure the driver
- * for a particular board. If you specified a board_name array
- * in the driver structure, dev->board_ptr contains that
- * address.
+ * Common part of attach and attach_pci.
*/
-static int pci224_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+static int pci224_attach_common(struct comedi_device *dev,
+ struct pci_dev *pci_dev, int *options)
{
struct comedi_subdevice *s;
- struct pci_dev *pci_dev;
unsigned int irq;
- int bus = 0, slot = 0;
unsigned n;
int ret;
- printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor, DRIVER_NAME);
-
- bus = it->options[0];
- slot = it->options[1];
- ret = alloc_private(dev, sizeof(struct pci224_private));
- if (ret < 0) {
- printk(KERN_ERR "comedi%d: error! out of memory!\n",
- dev->minor);
- return ret;
- }
-
- ret = pci224_find_pci(dev, bus, slot, &pci_dev);
- if (ret < 0)
- return ret;
-
devpriv->pci_dev = pci_dev;
ret = comedi_pci_enable(pci_dev, DRIVER_NAME);
if (ret < 0) {
@@ -1483,24 +1476,26 @@ static int pci224_attach(struct comedi_device *dev, struct \
comedi_devconfig *it) if (!s->range_table_list)
return -ENOMEM;
- for (n = 2; n < 3 + s->n_chan; n++) {
- if (it->options[n] < 0 || it->options[n] > 1) {
- printk(KERN_WARNING "comedi%d: %s: warning! "
- "bad options[%u]=%d\n",
- dev->minor, DRIVER_NAME, n,
- it->options[n]);
+ if (options) {
+ for (n = 2; n < 3 + s->n_chan; n++) {
+ if (options[n] < 0 || options[n] > 1) {
+ printk(KERN_WARNING
+ "comedi%d: %s: warning! bad options[%u]=%d\n",
+ dev->minor, DRIVER_NAME, n,
+ options[n]);
+ }
}
}
for (n = 0; n < s->n_chan; n++) {
- if (n < COMEDI_NDEVCONFOPTS - 3 &&
- it->options[3 + n] == 1) {
- if (it->options[2] == 1)
+ if (n < COMEDI_NDEVCONFOPTS - 3 && options &&
+ options[3 + n] == 1) {
+ if (options[2] == 1)
range_table_list[n] = &range_pci234_ext;
else
range_table_list[n] = &range_bipolar5;
} else {
- if (it->options[2] == 1) {
+ if (options && options[2] == 1) {
range_table_list[n] =
&range_pci234_ext2;
} else {
@@ -1511,14 +1506,14 @@ static int pci224_attach(struct comedi_device *dev, struct \
comedi_devconfig *it) devpriv->hwrange = hwrange_pci234;
} else {
/* PCI224 range options. */
- if (it->options[2] == 1) {
+ if (options && options[2] == 1) {
s->range_table = &range_pci224_external;
devpriv->hwrange = hwrange_pci224_external;
} else {
- if (it->options[2] != 0) {
+ if (options && options[2] != 0) {
printk(KERN_WARNING "comedi%d: %s: warning! "
"bad options[2]=%d\n",
- dev->minor, DRIVER_NAME, it->options[2]);
+ dev->minor, DRIVER_NAME, options[2]);
}
s->range_table = &range_pci224_internal;
devpriv->hwrange = hwrange_pci224_internal;
@@ -1553,6 +1548,66 @@ static int pci224_attach(struct comedi_device *dev, struct \
comedi_devconfig *it) }
/*
+ * _attach is called by the Comedi core to configure the driver
+ * for a particular board. If you specified a board_name array
+ * in the driver structure, dev->board_ptr contains that
+ * address.
+ */
+static int pci224_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+{
+ struct pci_dev *pci_dev;
+ int bus, slot;
+ int ret;
+
+ printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor, DRIVER_NAME);
+
+ bus = it->options[0];
+ slot = it->options[1];
+ ret = alloc_private(dev, sizeof(struct pci224_private));
+ if (ret < 0) {
+ printk(KERN_ERR "comedi%d: error! out of memory!\n",
+ dev->minor);
+ return ret;
+ }
+
+ ret = pci224_find_pci(dev, bus, slot, &pci_dev);
+ if (ret < 0)
+ return ret;
+
+ return pci224_attach_common(dev, pci_dev, it->options);
+}
+
+/*
+ * _attach_pci is called by comedi_pci_auto_config() in the Comedi core
+ * to configure a comedi device for a probed PCI device.
+ * dev->board_ptr is NULL on entry.
+ */
+static int
+pci224_attach_pci(struct comedi_device *dev, struct pci_dev *pci_dev)
+{
+ int ret;
+
+ printk(KERN_DEBUG "comedi%d: %s: attach_pci %s\n", dev->minor,
+ DRIVER_NAME, pci_name(pci_dev));
+
+ ret = alloc_private(dev, sizeof(struct pci224_private));
+ if (ret < 0) {
+ printk(KERN_ERR "comedi%d: error! out of memory!\n",
+ dev->minor);
+ return ret;
+ }
+
+ dev->board_ptr = pci224_find_pci_board(pci_dev);
+ if (dev->board_ptr == NULL) {
+ printk(KERN_ERR
+ "comedi%d: %s: BUG! cannot determine board type!\n",
+ dev->minor, DRIVER_NAME);
+ return -EINVAL;
+ }
+ return pci224_attach_common(dev, pci_dev, NULL);
+}
+
+/*
* _detach is called to deconfigure a device. It should deallocate
* resources.
* This function is also called when _attach() fails, so it should be
--
1.7.8.5
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