diff options
| author | corentin.labbe <corentin.labbe@geomatys.fr> | 2012-01-12 20:32:04 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2012-01-12 20:32:04 +0100 |
| commit | 65a2d74b76c5ae7c400de6daedeedae308ab0bdd (patch) | |
| tree | 0d296ef635e83b0c1966931dc6b8221f6538bc91 /drivers/i2c/busses/i2c-ali1535.c | |
| parent | 7c1f59c9d5caf3a84f35549b5d58f3c055a68da5 (diff) | |
i2c-ali1535: enable SPARC support
The i2c-ali1535 driver doesn't work on SPARC, because it assumes that
ioport address are 16-bit wide (address stored in an unsigned short).
But on SPARC arch, ioports are mapped in memory and so must be stored
in an unsigned long.
Use pci_resource_start for getting IOMEM base address, then read the
SMBBA of the i2c bus and use these together for I/O access.
I would like to thank Jean DELVARE for reviewing my patch.
Signed-off-by: LABBE Corentin <corentin.labbe@geomatys.fr>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-ali1535.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-ali1535.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c index 5b667e53a81..e66d248fc12 100644 --- a/drivers/i2c/busses/i2c-ali1535.c +++ b/drivers/i2c/busses/i2c-ali1535.c @@ -132,7 +132,8 @@ #define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */ static struct pci_driver ali1535_driver; -static unsigned short ali1535_smba; +static unsigned long ali1535_smba; +static unsigned short ali1535_offset; /* Detect whether a ALI1535 can be found, and initialize it, where necessary. Note the differences between kernels with the old PCI BIOS interface and @@ -149,16 +150,28 @@ static int __devinit ali1535_setup(struct pci_dev *dev) - We can use the addresses */ + retval = pci_enable_device(dev); + if (retval) { + dev_err(&dev->dev, "ALI1535_smb can't enable device\n"); + goto exit; + } + /* Determine the address of the SMBus area */ - pci_read_config_word(dev, SMBBA, &ali1535_smba); - ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); - if (ali1535_smba == 0) { + pci_read_config_word(dev, SMBBA, &ali1535_offset); + dev_dbg(&dev->dev, "ALI1535_smb is at offset 0x%04x\n", ali1535_offset); + ali1535_offset &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); + if (ali1535_offset == 0) { dev_warn(&dev->dev, "ALI1535_smb region uninitialized - upgrade BIOS?\n"); retval = -ENODEV; goto exit; } + if (pci_resource_flags(dev, 0) & IORESOURCE_IO) + ali1535_smba = pci_resource_start(dev, 0) + ali1535_offset; + else + ali1535_smba = ali1535_offset; + retval = acpi_check_region(ali1535_smba, ALI1535_SMB_IOSIZE, ali1535_driver.name); if (retval) @@ -166,7 +179,7 @@ static int __devinit ali1535_setup(struct pci_dev *dev) if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE, ali1535_driver.name)) { - dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n", + dev_err(&dev->dev, "ALI1535_smb region 0x%lx already in use!\n", ali1535_smba); retval = -EBUSY; goto exit; @@ -200,7 +213,7 @@ static int __devinit ali1535_setup(struct pci_dev *dev) */ pci_read_config_byte(dev, SMBREV, &temp); dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp); - dev_dbg(&dev->dev, "ALI1535_smba = 0x%X\n", ali1535_smba); + dev_dbg(&dev->dev, "ALI1535_smba = 0x%lx\n", ali1535_smba); return 0; @@ -501,7 +514,7 @@ static int __devinit ali1535_probe(struct pci_dev *dev, const struct pci_device_ ali1535_adapter.dev.parent = &dev->dev; snprintf(ali1535_adapter.name, sizeof(ali1535_adapter.name), - "SMBus ALI1535 adapter at %04x", ali1535_smba); + "SMBus ALI1535 adapter at %04x", ali1535_offset); return i2c_add_adapter(&ali1535_adapter); } |