In a future patch, the port I/O functions (`inb()`, `outb()`, and
friends will only be declared in the `HAS_IOPORT` configuration option
is enabled.
The 8255_pci module supports PCI digital I/O devices from various
manufacturers that consist of one or more 8255 Programmable Peripheral
Interface chips (or equivalent hardware) to provide their digital I/O
ports. Some of the devices use port I/O and some only use memory-mapped
I/O.
Conditionally compile in support for the devices that need port I/O if
and only if the `CONFIG_HAS_IOPORT` macro is defined. Change
`pci_8255_auto_attach()` to return an error if the device actually
requires port I/O (based on the PCI BAR resource flags) but the
`HAS_IOPORT` configuration is not enabled.
Cc: Arnd Bergmann <[email protected]>
Cc: Niklas Schnelle <[email protected]>
Signed-off-by: Ian Abbott <[email protected]>
---
v2: correct `CONFIG_HAS_PORTIO` to `CONFIG_HAS_IOPORT`.
---
drivers/comedi/drivers/8255_pci.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/comedi/drivers/8255_pci.c b/drivers/comedi/drivers/8255_pci.c
index 0fec048e3a53..9ad52e9f5427 100644
--- a/drivers/comedi/drivers/8255_pci.c
+++ b/drivers/comedi/drivers/8255_pci.c
@@ -57,6 +57,7 @@
#include <linux/comedi/comedi_8255.h>
enum pci_8255_boardid {
+#ifdef CONFIG_HAS_IOPORT
BOARD_ADLINK_PCI7224,
BOARD_ADLINK_PCI7248,
BOARD_ADLINK_PCI7296,
@@ -65,6 +66,7 @@ enum pci_8255_boardid {
BOARD_CB_PCIDIO48H_OLD,
BOARD_CB_PCIDIO48H_NEW,
BOARD_CB_PCIDIO96H,
+#endif /* CONFIG_HAS_IOPORT */
BOARD_NI_PCIDIO96,
BOARD_NI_PCIDIO96B,
BOARD_NI_PXI6508,
@@ -82,6 +84,7 @@ struct pci_8255_boardinfo {
};
static const struct pci_8255_boardinfo pci_8255_boards[] = {
+#ifdef CONFIG_HAS_IOPORT
[BOARD_ADLINK_PCI7224] = {
.name = "adl_pci-7224",
.dio_badr = 2,
@@ -122,6 +125,7 @@ static const struct pci_8255_boardinfo pci_8255_boards[] = {
.dio_badr = 2,
.n_8255 = 4,
},
+#endif /* CONFIG_HAS_IOPORT */
[BOARD_NI_PCIDIO96] = {
.name = "ni_pci-dio-96",
.dio_badr = 1,
@@ -219,8 +223,11 @@ static int pci_8255_auto_attach(struct comedi_device *dev,
dev->mmio = pci_ioremap_bar(pcidev, board->dio_badr);
if (!dev->mmio)
return -ENOMEM;
- } else {
+ } else if (IS_ENABLED(CONFIG_HAS_IOPORT)) {
dev->iobase = pci_resource_start(pcidev, board->dio_badr);
+ } else {
+ dev_err(dev->class_dev, "error! need I/O port support\n");
+ return -ENXIO;
}
/*
@@ -259,6 +266,7 @@ static int pci_8255_pci_probe(struct pci_dev *dev,
}
static const struct pci_device_id pci_8255_pci_table[] = {
+#ifdef CONFIG_HAS_IOPORT
{ PCI_VDEVICE(ADLINK, 0x7224), BOARD_ADLINK_PCI7224 },
{ PCI_VDEVICE(ADLINK, 0x7248), BOARD_ADLINK_PCI7248 },
{ PCI_VDEVICE(ADLINK, 0x7296), BOARD_ADLINK_PCI7296 },
@@ -269,6 +277,7 @@ static const struct pci_device_id pci_8255_pci_table[] = {
{ PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, PCI_VENDOR_ID_CB, 0x000b),
.driver_data = BOARD_CB_PCIDIO48H_NEW },
{ PCI_VDEVICE(CB, 0x0017), BOARD_CB_PCIDIO96H },
+#endif /* CONFIG_HAS_IOPORT */
{ PCI_VDEVICE(NI, 0x0160), BOARD_NI_PCIDIO96 },
{ PCI_VDEVICE(NI, 0x1630), BOARD_NI_PCIDIO96B },
{ PCI_VDEVICE(NI, 0x13c0), BOARD_NI_PXI6508 },
--
2.40.1