73 lines
2.5 KiB
Diff
73 lines
2.5 KiB
Diff
From 9a6a2b96dfd8b01336f8519a5be7fb353cfa62fb Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
|
|
Date: Sat, 14 Mar 2015 17:55:54 +0100
|
|
Subject: [PATCH] MIPS: BCM47XX: Support SPROM prefixes for PCI devices
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Support parsing SPROMs with prefixes defined like devpath1=pci/1/1
|
|
|
|
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
|
|
Cc: linux-mips@linux-mips.org
|
|
Cc: Hauke Mehrtens <hauke@hauke-m.de>
|
|
Patchwork: https://patchwork.linux-mips.org/patch/9552/
|
|
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
|
---
|
|
arch/mips/bcm47xx/sprom.c | 33 +++++++++++++++++++++++++++++++++
|
|
1 file changed, 33 insertions(+)
|
|
|
|
diff --git a/arch/mips/bcm47xx/sprom.c b/arch/mips/bcm47xx/sprom.c
|
|
index 2eff7fe..eff9205 100644
|
|
--- a/arch/mips/bcm47xx/sprom.c
|
|
+++ b/arch/mips/bcm47xx/sprom.c
|
|
@@ -836,6 +836,38 @@ static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
|
|
#endif
|
|
|
|
#if defined(CONFIG_BCM47XX_BCMA)
|
|
+/*
|
|
+ * Having many NVRAM entries for PCI devices led to repeating prefixes like
|
|
+ * pci/1/1/ all the time and wasting flash space. So at some point Broadcom
|
|
+ * decided to introduce prefixes like 0: 1: 2: etc.
|
|
+ * If we find e.g. devpath0=pci/2/1 or devpath0=pci/2/1/ we should use 0:
|
|
+ * instead of pci/2/1/.
|
|
+ */
|
|
+static void bcm47xx_sprom_apply_prefix_alias(char *prefix, size_t prefix_size)
|
|
+{
|
|
+ size_t prefix_len = strlen(prefix);
|
|
+ size_t short_len = prefix_len - 1;
|
|
+ char nvram_var[10];
|
|
+ char buf[20];
|
|
+ int i;
|
|
+
|
|
+ /* Passed prefix has to end with a slash */
|
|
+ if (prefix_len <= 0 || prefix[prefix_len - 1] != '/')
|
|
+ return;
|
|
+
|
|
+ for (i = 0; i < 3; i++) {
|
|
+ if (snprintf(nvram_var, sizeof(nvram_var), "devpath%d", i) <= 0)
|
|
+ continue;
|
|
+ if (bcm47xx_nvram_getenv(nvram_var, buf, sizeof(buf)) < 0)
|
|
+ continue;
|
|
+ if (!strcmp(buf, prefix) ||
|
|
+ (short_len && strlen(buf) == short_len && !strncmp(buf, prefix, short_len))) {
|
|
+ snprintf(prefix, prefix_size, "%d:", i);
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
|
|
{
|
|
char prefix[10];
|
|
@@ -847,6 +879,7 @@ static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
|
|
snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
|
|
bus->host_pci->bus->number + 1,
|
|
PCI_SLOT(bus->host_pci->devfn));
|
|
+ bcm47xx_sprom_apply_prefix_alias(prefix, sizeof(prefix));
|
|
bcm47xx_fill_sprom(out, prefix, false);
|
|
return 0;
|
|
case BCMA_HOSTTYPE_SOC:
|
|
--
|
|
1.8.4.5
|
|
|