MIPS: BCM47XX: Move SPROM fallback code into sprom.c

This is some general cleanup as well as preparing sprom.c to become a
standalone driver. We will need this for bcm53xx ARM arch support.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8232/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/arch/mips/bcm47xx/sprom.c b/arch/mips/bcm47xx/sprom.c
index 41226b68de3d..e772e775c797 100644
--- a/arch/mips/bcm47xx/sprom.c
+++ b/arch/mips/bcm47xx/sprom.c
@@ -801,3 +801,71 @@ void bcm47xx_fill_bcma_boardinfo(struct bcma_boardinfo *boardinfo,
 	nvram_read_u16(prefix, NULL, "boardtype", &boardinfo->type, 0, true);
 }
 #endif
+
+#if defined(CONFIG_BCM47XX_SSB)
+static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
+{
+	char prefix[10];
+
+	if (bus->bustype == SSB_BUSTYPE_PCI) {
+		memset(out, 0, sizeof(struct ssb_sprom));
+		snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
+			 bus->host_pci->bus->number + 1,
+			 PCI_SLOT(bus->host_pci->devfn));
+		bcm47xx_fill_sprom(out, prefix, false);
+		return 0;
+	} else {
+		pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
+		return -EINVAL;
+	}
+}
+#endif
+
+#if defined(CONFIG_BCM47XX_BCMA)
+static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
+{
+	char prefix[10];
+	struct bcma_device *core;
+
+	switch (bus->hosttype) {
+	case BCMA_HOSTTYPE_PCI:
+		memset(out, 0, sizeof(struct ssb_sprom));
+		snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
+			 bus->host_pci->bus->number + 1,
+			 PCI_SLOT(bus->host_pci->devfn));
+		bcm47xx_fill_sprom(out, prefix, false);
+		return 0;
+	case BCMA_HOSTTYPE_SOC:
+		memset(out, 0, sizeof(struct ssb_sprom));
+		core = bcma_find_core(bus, BCMA_CORE_80211);
+		if (core) {
+			snprintf(prefix, sizeof(prefix), "sb/%u/",
+				 core->core_index);
+			bcm47xx_fill_sprom(out, prefix, true);
+		} else {
+			bcm47xx_fill_sprom(out, NULL, false);
+		}
+		return 0;
+	default:
+		pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
+		return -EINVAL;
+	}
+}
+#endif
+
+/*
+ * On bcm47xx we need to register SPROM fallback handler very early, so we can't
+ * use anything like platform device / driver for this.
+ */
+void bcm47xx_sprom_register_fallbacks(void)
+{
+#if defined(CONFIG_BCM47XX_SSB)
+	if (ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb))
+		pr_warn("Failed to registered ssb SPROM handler\n");
+#endif
+
+#if defined(CONFIG_BCM47XX_BCMA)
+	if (bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma))
+		pr_warn("Failed to registered bcma SPROM handler\n");
+#endif
+}