mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-01 07:49:22 +02:00
c5a9834bb4
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16127 3c298f89-4303-0410-b956-a3cf2f4a3e73
108 lines
3.1 KiB
Diff
108 lines
3.1 KiB
Diff
--- a/drivers/ssb/pci.c
|
|
+++ b/drivers/ssb/pci.c
|
|
@@ -514,6 +514,7 @@ 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;
|
|
|
|
@@ -533,12 +534,23 @@ 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);
|