mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-14 14:49:22 +02:00
550b5a8a06
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31093 3c298f89-4303-0410-b956-a3cf2f4a3e73
126 lines
3.4 KiB
Diff
126 lines
3.4 KiB
Diff
|
|
--- a/drivers/bcma/sprom.c
|
|
+++ b/drivers/bcma/sprom.c
|
|
@@ -2,6 +2,8 @@
|
|
* Broadcom specific AMBA
|
|
* SPROM reading
|
|
*
|
|
+ * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
|
|
+ *
|
|
* Licensed under the GNU/GPL. See COPYING for details.
|
|
*/
|
|
|
|
@@ -16,6 +18,45 @@
|
|
|
|
#define SPOFF(offset) ((offset) / sizeof(u16))
|
|
|
|
+static int(*get_fallback_sprom)(struct bcma_bus *dev, struct ssb_sprom *out);
|
|
+
|
|
+/**
|
|
+ * bcma_arch_register_fallback_sprom - Registers a method providing a
|
|
+ * fallback SPROM if no SPROM is found.
|
|
+ *
|
|
+ * @sprom_callback: The callback function.
|
|
+ *
|
|
+ * With this function the architecture implementation may register a
|
|
+ * callback handler which fills the SPROM data structure. The fallback is
|
|
+ * used for PCI based BCMA devices, where no valid SPROM can be found
|
|
+ * in the shadow registers and to provide the SPROM for SoCs where BCMA is
|
|
+ * to controll the system bus.
|
|
+ *
|
|
+ * This function is useful for weird architectures that have a half-assed
|
|
+ * BCMA device hardwired to their PCI bus.
|
|
+ *
|
|
+ * This function is available for architecture code, only. So it is not
|
|
+ * exported.
|
|
+ */
|
|
+int bcma_arch_register_fallback_sprom(int (*sprom_callback)(struct bcma_bus *bus,
|
|
+ struct ssb_sprom *out))
|
|
+{
|
|
+ if (get_fallback_sprom)
|
|
+ return -EEXIST;
|
|
+ get_fallback_sprom = sprom_callback;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int bcma_fill_sprom_with_fallback(struct bcma_bus *bus,
|
|
+ struct ssb_sprom *out)
|
|
+{
|
|
+ if (!get_fallback_sprom)
|
|
+ return -ENOENT;
|
|
+
|
|
+ return get_fallback_sprom(bus, out);
|
|
+}
|
|
+
|
|
/**************************************************
|
|
* R/W ops.
|
|
**************************************************/
|
|
@@ -205,23 +246,43 @@ static void bcma_sprom_extract_r8(struct
|
|
SSB_SROM8_FEM_ANTSWLUT) >> SSB_SROM8_FEM_ANTSWLUT_SHIFT;
|
|
}
|
|
|
|
+static bool bcma_is_sprom_available(struct bcma_bus *bus)
|
|
+{
|
|
+ u32 sromctrl;
|
|
+
|
|
+ if (!(bus->drv_cc.capabilities & BCMA_CC_CAP_SPROM))
|
|
+ return false;
|
|
+
|
|
+ if (bus->drv_cc.core->id.rev >= 32) {
|
|
+ sromctrl = bcma_read32(bus->drv_cc.core, BCMA_CC_SROM_CONTROL);
|
|
+ return sromctrl & BCMA_CC_SROM_CONTROL_PRESENT;
|
|
+ }
|
|
+ return true;
|
|
+}
|
|
+
|
|
int bcma_sprom_get(struct bcma_bus *bus)
|
|
{
|
|
u16 offset;
|
|
u16 *sprom;
|
|
- u32 sromctrl;
|
|
int err = 0;
|
|
|
|
if (!bus->drv_cc.core)
|
|
return -EOPNOTSUPP;
|
|
|
|
- if (!(bus->drv_cc.capabilities & BCMA_CC_CAP_SPROM))
|
|
- return -ENOENT;
|
|
-
|
|
- if (bus->drv_cc.core->id.rev >= 32) {
|
|
- sromctrl = bcma_read32(bus->drv_cc.core, BCMA_CC_SROM_CONTROL);
|
|
- if (!(sromctrl & BCMA_CC_SROM_CONTROL_PRESENT))
|
|
- return -ENOENT;
|
|
+ if (!bcma_is_sprom_available(bus)) {
|
|
+ /*
|
|
+ * Maybe there is no SPROM on the device?
|
|
+ * Now we ask the arch code if there is some sprom
|
|
+ * available for this device in some other storage.
|
|
+ */
|
|
+ err = bcma_fill_sprom_with_fallback(bus, &bus->sprom);
|
|
+ if (err) {
|
|
+ pr_warn("Using fallback SPROM failed (err %d)\n", err);
|
|
+ } else {
|
|
+ pr_debug("Using SPROM revision %d provided by"
|
|
+ " platform.\n", bus->sprom.revision);
|
|
+ return 0;
|
|
+ }
|
|
}
|
|
|
|
sprom = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
|
|
--- a/include/linux/bcma/bcma.h
|
|
+++ b/include/linux/bcma/bcma.h
|
|
@@ -177,6 +177,12 @@ int __bcma_driver_register(struct bcma_d
|
|
|
|
extern void bcma_driver_unregister(struct bcma_driver *drv);
|
|
|
|
+/* Set a fallback SPROM.
|
|
+ * See kdoc at the function definition for complete documentation. */
|
|
+extern int bcma_arch_register_fallback_sprom(
|
|
+ int (*sprom_callback)(struct bcma_bus *bus,
|
|
+ struct ssb_sprom *out));
|
|
+
|
|
struct bcma_bus {
|
|
/* The MMIO area. */
|
|
void __iomem *mmio;
|