diff options
| author | Michael Buesch <mb@bu3sch.de> | 2009-02-27 16:59:05 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-03-05 14:39:32 -0500 |
| commit | e79c1ba84c68de9161d541bd2bcc8ea65c89955c (patch) | |
| tree | 9399343651e9d92fb92f0c7bd6280353cb296913 /drivers/ssb/pci.c | |
| parent | e31ae0508315ebf5d8b1b8a1fca8550737fb3996 (diff) | |
| download | lwn-e79c1ba84c68de9161d541bd2bcc8ea65c89955c.tar.gz lwn-e79c1ba84c68de9161d541bd2bcc8ea65c89955c.zip | |
ssb: Add SPROM fallback support
This adds SSB functionality to register a fallback SPROM image from the
architecture setup code.
Weird architectures exist that have half-assed SSB devices without SPROM attached to
their PCI busses. The architecture can register a fallback SPROM image that is
used if no SPROM is found on the SSB device.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: Florian Fainelli <florian@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/ssb/pci.c')
| -rw-r--r-- | drivers/ssb/pci.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/ssb/pci.c b/drivers/ssb/pci.c index c958ac16423c..40ea41762247 100644 --- a/drivers/ssb/pci.c +++ b/drivers/ssb/pci.c @@ -564,6 +564,7 @@ static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out, static int ssb_pci_sprom_get(struct ssb_bus *bus, struct ssb_sprom *sprom) { + const struct ssb_sprom *fallback; int err = -ENOMEM; u16 *buf; @@ -583,12 +584,23 @@ static int ssb_pci_sprom_get(struct ssb_bus *bus, bus->sprom_size = SSB_SPROMSIZE_WORDS_R4; sprom_do_read(bus, buf); err = sprom_check_crc(buf, bus->sprom_size); - if (err) + if (err) { + /* All CRC attempts failed. + * Maybe there is no SPROM on the device? + * If we have a fallback, use that. */ + fallback = ssb_get_fallback_sprom(); + if (fallback) { + memcpy(sprom, fallback, sizeof(*sprom)); + err = 0; + goto out_free; + } ssb_printk(KERN_WARNING PFX "WARNING: Invalid" " SPROM CRC (corrupt SPROM)\n"); + } } err = sprom_extract(bus, sprom, buf, bus->sprom_size); +out_free: kfree(buf); out: return err; |