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>
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@ -132,7 +132,8 @@
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#define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */
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static struct pci_driver ali1535_driver;
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static unsigned short ali1535_smba;
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static unsigned long ali1535_smba;
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static unsigned short ali1535_offset;
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/* Detect whether a ALI1535 can be found, and initialize it, where necessary.
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Note the differences between kernels with the old PCI BIOS interface and
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@ -149,16 +150,28 @@ static int __devinit ali1535_setup(struct pci_dev *dev)
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- We can use the addresses
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*/
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retval = pci_enable_device(dev);
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if (retval) {
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dev_err(&dev->dev, "ALI1535_smb can't enable device\n");
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goto exit;
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}
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/* Determine the address of the SMBus area */
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pci_read_config_word(dev, SMBBA, &ali1535_smba);
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ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1));
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if (ali1535_smba == 0) {
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pci_read_config_word(dev, SMBBA, &ali1535_offset);
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dev_dbg(&dev->dev, "ALI1535_smb is at offset 0x%04x\n", ali1535_offset);
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ali1535_offset &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1));
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if (ali1535_offset == 0) {
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dev_warn(&dev->dev,
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"ALI1535_smb region uninitialized - upgrade BIOS?\n");
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retval = -ENODEV;
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goto exit;
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}
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if (pci_resource_flags(dev, 0) & IORESOURCE_IO)
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ali1535_smba = pci_resource_start(dev, 0) + ali1535_offset;
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else
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ali1535_smba = ali1535_offset;
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retval = acpi_check_region(ali1535_smba, ALI1535_SMB_IOSIZE,
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ali1535_driver.name);
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if (retval)
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@ -166,7 +179,7 @@ static int __devinit ali1535_setup(struct pci_dev *dev)
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if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE,
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ali1535_driver.name)) {
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dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n",
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dev_err(&dev->dev, "ALI1535_smb region 0x%lx already in use!\n",
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ali1535_smba);
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retval = -EBUSY;
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goto exit;
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@ -200,7 +213,7 @@ static int __devinit ali1535_setup(struct pci_dev *dev)
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*/
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pci_read_config_byte(dev, SMBREV, &temp);
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dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp);
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dev_dbg(&dev->dev, "ALI1535_smba = 0x%X\n", ali1535_smba);
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dev_dbg(&dev->dev, "ALI1535_smba = 0x%lx\n", ali1535_smba);
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return 0;
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@ -501,7 +514,7 @@ static int __devinit ali1535_probe(struct pci_dev *dev, const struct pci_device_
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ali1535_adapter.dev.parent = &dev->dev;
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snprintf(ali1535_adapter.name, sizeof(ali1535_adapter.name),
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"SMBus ALI1535 adapter at %04x", ali1535_smba);
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"SMBus ALI1535 adapter at %04x", ali1535_offset);
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return i2c_add_adapter(&ali1535_adapter);
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}
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