openwrt/upstream - upstream openwrt

	Commit message (Expand)	Author	Age	Files	Lines
*	bcm63xx: replace SPI driver with latest upstream version	Jonas Gorski	2012-03-28	1	-0/+93

--- a/drivers/ssb/pci.c +++ b/drivers/ssb/pci.c @@ -500,6 +500,7 @@ unsupported: static int ssb_pci_sprom_get(struct ssb_bus *bus, struct ssb_sprom *sprom) { + const struct ssb_sprom *fallback; int err = -ENOMEM; u16 *buf; @@ -519,12 +520,23 @@ static int ssb_pci_sprom_get(struct ssb_ 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; --- a/drivers/ssb/sprom.c +++ b/drivers/ssb/sprom.c @@ -14,6 +14,9 @@ #include "ssb_private.h" +static const struct ssb_sprom *fallback_sprom; + + static int sprom2hex(const u16 *sprom, char *buf, size_t buf_len, size_t sprom_size_words) { @@ -131,3 +134,36 @@ out: return res; return err ? err : count; } + +/** + * ssb_arch_set_fallback_sprom - Set a fallback SPROM for use if no SPROM is found. + * + * @sprom: The SPROM data structure to register. + * + * With this function the architecture implementation may register a fallback + * SPROM data structure. The fallback is only used for PCI based SSB devices, + * where no valid SPROM can be found in the shadow registers. + * + * This function is useful for weird architectures that have a half-assed SSB device + * hardwired to their PCI bus. + * + * Note that it does only work with PCI attached SSB devices. PCMCIA devices currently + * don't use this fallback. + * Architectures must provide the SPROM for native SSB devices anyway, + * so the fallback also isn't used for native devices. + * + * This function is available for architecture code, only. So it is not exported. + */ +int ssb_arch_set_fallback_sprom(const struct ssb_sprom *sprom) +{ + if (fallback_sprom) + return -EEXIST; + fallback_sprom = sprom; + + return 0; +} + +const struct ssb_sprom *ssb_get_fallback_sprom(void) +{ + return fallback_sprom; +} --- a/drivers/ssb/ssb_private.h +++ b/drivers/ssb/ssb_private.h @@ -131,6 +131,7 @@ ssize_t ssb_attr_sprom_store(struct ssb_ const char *buf, size_t count, int (*sprom_check_crc)(const u16 *sprom, size_t size), int (*sprom_write)(struct ssb_bus *bus, const u16 *sprom)); +extern const struct ssb_sprom *ssb_get_fallback_sprom(void); /* core.c */ --- a/include/linux/ssb/ssb.h +++ b/include/linux/ssb/ssb.h @@ -339,6 +339,10 @@ extern int ssb_bus_pcmciabus_register(st extern void ssb_bus_unregister(struct ssb_bus *bus); +/* Set a fallback SPROM. + * See kdoc at the function definition for complete documentation. */ +extern int ssb_arch_set_fallback_sprom(const struct ssb_sprom *sprom); + /* Suspend a SSB bus. * Call this from the parent bus suspend routine. */ extern int ssb_bus_suspend(struct ssb_bus *bus);