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staging: comedi: amplc_dio200: Simplify PCI board look-up

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Set the `driver_data` member of each element (apart from the sentinel)
of our PCI device table `dio200_pci_table[]` to the index of the
corresponding element of our private PCI board details
`dio200_pci_boards[]`.  This index appears in the context parameter of
our auto_attach routine `dio200_auto_attach()`.  In this function,
nename the parameter to `context_model` and use it to set
`dev->board_ptr` to point to an element of `dio200_pci_boards[] directly
by index instead of calling `dio200_find_pci_board()` to search for the
element whose `devid` member matches the PCI device ID.

Remove `dio200_find_pci_board()` and the `devid` member of `struct
dio200_board`.  Also remove the `model` member of `struct dio200_board`
and the `enum dio200_model` type as we can do without them.  The only
function that uses the `model` member is `dio200_auto_attach()`, so use
the `context_model` parameter instead.

Define the enumerated value for each PCI board in new type `enum
dio200_pci_model` which replaces `enum dio200_model` minus the
enumerated values for the ISA boards (so the numeric values for the PCI
boards have changed).  Use these enumerated values to designate the
initializer for each element of `dio200_pci_boards[]`.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2013-03-18 17:19:00 +00:00 committed by Greg Kroah-Hartman
parent 3c6b670d4f
commit 470cf7261a
1 changed files with 38 additions and 60 deletions
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96
drivers/staging/comedi/drivers/amplc_dio200.c
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@ -378,14 +378,12 @@ struct dio200_region {
enum dio200_bustype { isa_bustype, pci_bustype };
enum dio200_model {
pc212e_model,
pc214e_model,
pc215e_model, pci215_model, pcie215_model,
pc218e_model,
enum dio200_pci_model {
pci215_model,
pci272_model,
pcie215_model,
pcie236_model,
pc272e_model, pci272_model,
pcie296_model,
pcie296_model
};
enum dio200_layout_idx {
@ -407,9 +405,7 @@ enum dio200_layout_idx {
struct dio200_board {
const char *name;
unsigned short devid;
enum dio200_bustype bustype;
enum dio200_model model;
enum dio200_layout_idx layout;
unsigned char mainbar;
unsigned char mainshift;
@ -421,35 +417,30 @@ static const struct dio200_board dio200_isa_boards[] = {
{
.name = "pc212e",
.bustype = isa_bustype,
.model = pc212e_model,
.layout = pc212_layout,
.mainsize = DIO200_IO_SIZE,
},
{
.name = "pc214e",
.bustype = isa_bustype,
.model = pc214e_model,
.layout = pc214_layout,
.mainsize = DIO200_IO_SIZE,
},
{
.name = "pc215e",
.bustype = isa_bustype,
.model = pc215e_model,
.layout = pc215_layout,
.mainsize = DIO200_IO_SIZE,
},
{
.name = "pc218e",
.bustype = isa_bustype,
.model = pc218e_model,
.layout = pc218_layout,
.mainsize = DIO200_IO_SIZE,
},
{
.name = "pc272e",
.bustype = isa_bustype,
.model = pc272e_model,
.layout = pc272_layout,
.mainsize = DIO200_IO_SIZE,
},
@ -458,49 +449,39 @@ static const struct dio200_board dio200_isa_boards[] = {
#if DO_PCI
static const struct dio200_board dio200_pci_boards[] = {
{
[pci215_model] {
.name = "pci215",
.devid = PCI_DEVICE_ID_AMPLICON_PCI215,
.bustype = pci_bustype,
.model = pci215_model,
.layout = pc215_layout,
.mainbar = 2,
.mainsize = DIO200_IO_SIZE,
},
{
[pci272_model] {
.name = "pci272",
.devid = PCI_DEVICE_ID_AMPLICON_PCI272,
.bustype = pci_bustype,
.model = pci272_model,
.layout = pc272_layout,
.mainbar = 2,
.mainsize = DIO200_IO_SIZE,
},
{
[pcie215_model] {
.name = "pcie215",
.devid = PCI_DEVICE_ID_AMPLICON_PCIE215,
.bustype = pci_bustype,
.model = pcie215_model,
.layout = pcie215_layout,
.mainbar = 1,
.mainshift = 3,
.mainsize = DIO200_PCIE_IO_SIZE,
},
{
[pcie236_model] {
.name = "pcie236",
.devid = PCI_DEVICE_ID_AMPLICON_PCIE236,
.bustype = pci_bustype,
.model = pcie236_model,
.layout = pcie236_layout,
.mainbar = 1,
.mainshift = 3,
.mainsize = DIO200_PCIE_IO_SIZE,
},
{
[pcie296_model] {
.name = "pcie296",
.devid = PCI_DEVICE_ID_AMPLICON_PCIE296,
.bustype = pci_bustype,
.model = pcie296_model,
.layout = pcie296_layout,
.mainbar = 1,
.mainshift = 3,
@ -732,20 +713,6 @@ static void dio200_write32(struct comedi_device *dev, unsigned int offset,
writel(val, devpriv->io.u.membase + offset);
}
/*
* This function looks for a board matching the supplied PCI device.
*/
static const struct dio200_board *
dio200_find_pci_board(struct pci_dev *pci_dev)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(dio200_pci_boards); i++)
if (pci_dev->device == dio200_pci_boards[i].devid)
return &dio200_pci_boards[i];
return NULL;
}
/*
* This function checks and requests an I/O region, reporting an error
* if there is a conflict.
@ -1908,13 +1875,13 @@ static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
/*
* The auto_attach hook is called at PCI probe time via
* comedi_pci_auto_config(). dev->board_ptr is NULL on entry.
* There should be a board entry matching the supplied PCI device.
* The context should be an index into dio200_pci_boards[].
*/
static int dio200_auto_attach(struct comedi_device *dev,
unsigned long context_unused)
unsigned long context_model)
{
struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
const struct dio200_board *thisboard;
const struct dio200_board *thisboard = NULL;
struct dio200_private *devpriv;
resource_size_t base, len;
unsigned int bar;
@ -1923,6 +1890,13 @@ static int dio200_auto_attach(struct comedi_device *dev,
if (!DO_PCI)
return -EINVAL;
if (context_model < ARRAY_SIZE(dio200_pci_boards))
thisboard = &dio200_pci_boards[context_model];
if (!thisboard)
return -EINVAL;
dev->board_ptr = thisboard;
dev->board_name = thisboard->name;
dev_info(dev->class_dev, DIO200_DRIVER_NAME ": attach pci %s\n",
pci_name(pci_dev));
@ -1931,13 +1905,6 @@ static int dio200_auto_attach(struct comedi_device *dev,
return -ENOMEM;
dev->private = devpriv;
dev->board_ptr = dio200_find_pci_board(pci_dev);
if (dev->board_ptr == NULL) {
dev_err(dev->class_dev, "BUG! cannot determine board type!\n");
return -EINVAL;
}
thisboard = comedi_board(dev);
ret = comedi_pci_enable(dev);
if (ret)
return ret;
@ -1961,7 +1928,7 @@ static int dio200_auto_attach(struct comedi_device *dev,
devpriv->io.u.iobase = (unsigned long)base;
devpriv->io.regtype = io_regtype;
}
switch (thisboard->model) {
switch (context_model) {
case pcie215_model:
case pcie236_model:
case pcie296_model:
@ -2042,11 +2009,22 @@ static struct comedi_driver amplc_dio200_driver = {
#if DO_PCI
static DEFINE_PCI_DEVICE_TABLE(dio200_pci_table) = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE236) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE215) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE296) },
{
PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215),
pci215_model
}, {
PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272),
pci272_model
}, {
PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE236),
pcie236_model
}, {
PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE215),
pcie215_model
}, {
PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE296),
pcie296_model
},
{0}
};