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authorHauke Mehrtens <hauke@hauke-m.de>2012-04-25 20:32:17 +0000
committerHauke Mehrtens <hauke@hauke-m.de>2012-04-25 20:32:17 +0000
commitd7b7b99d6e9195e0e563d14336628b533b0fcd29 (patch)
tree9b9058a71fe30bd7a5784afd7a5b32d6fc47793e /target/linux/brcm47xx
parentd8c7ac8a8ab8ef8fe2bbb254ca6ca5c83a898068 (diff)
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brcm47xx: BCMA - Modified PCI CFG space access
The existing code (prior to the patch) does an "ioremap_nocache" on a subset of a memory region that I think has already been mapped, and then un-maps that smaller region when it is finished. Thanks Nathan Hintz for the patch SVN-Revision: 31481
Diffstat (limited to 'target/linux/brcm47xx')
-rw-r--r--target/linux/brcm47xx/patches-3.2/240-bcma-pcie-config-access.patch104
1 files changed, 104 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.2/240-bcma-pcie-config-access.patch b/target/linux/brcm47xx/patches-3.2/240-bcma-pcie-config-access.patch
new file mode 100644
index 0000000..874c249
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.2/240-bcma-pcie-config-access.patch
@@ -0,0 +1,104 @@
+--- a/drivers/bcma/driver_pci_host.c
++++ b/drivers/bcma/driver_pci_host.c
+@@ -99,19 +99,19 @@ static int bcma_extpci_read_config(struc
+ if (dev == 0) {
+ /* we support only two functions on device 0 */
+ if (func > 1)
+- return -EINVAL;
++ goto out;
+
+ /* accesses to config registers with offsets >= 256
+ * requires indirect access.
+ */
+ if (off >= PCI_CONFIG_SPACE_SIZE) {
+ addr = (func << 12);
+- addr |= (off & 0x0FFF);
++ addr |= (off & 0x0FFC);
+ val = bcma_pcie_read_config(pc, addr);
+ } else {
+ addr = BCMA_CORE_PCI_PCICFG0;
+ addr |= (func << 8);
+- addr |= (off & 0xfc);
++ addr |= (off & 0xFC);
+ val = pcicore_read32(pc, addr);
+ }
+ } else {
+@@ -127,8 +127,6 @@ static int bcma_extpci_read_config(struc
+ val = 0xffffffff;
+ goto unmap;
+ }
+-
+- val = readl(mmio);
+ }
+ val >>= (8 * (off & 3));
+
+@@ -156,7 +154,7 @@ static int bcma_extpci_write_config(stru
+ const void *buf, int len)
+ {
+ int err = -EINVAL;
+- u32 addr = 0, val = 0;
++ u32 addr, val;
+ void __iomem *mmio = 0;
+ u16 chipid = pc->core->bus->chipinfo.id;
+
+@@ -164,16 +162,22 @@ static int bcma_extpci_write_config(stru
+ if (unlikely(len != 1 && len != 2 && len != 4))
+ goto out;
+ if (dev == 0) {
++ /* we support only two functions on device 0 */
++ if (func > 1)
++ goto out;
++
+ /* accesses to config registers with offsets >= 256
+ * requires indirect access.
+ */
+- if (off < PCI_CONFIG_SPACE_SIZE) {
+- addr = pc->core->addr + BCMA_CORE_PCI_PCICFG0;
++ if (off >= PCI_CONFIG_SPACE_SIZE) {
++ addr = (func << 12);
++ addr |= (off & 0x0FFC);
++ val = bcma_pcie_read_config(pc, addr);
++ } else {
++ addr = BCMA_CORE_PCI_PCICFG0;
+ addr |= (func << 8);
+- addr |= (off & 0xfc);
+- mmio = ioremap_nocache(addr, sizeof(val));
+- if (!mmio)
+- goto out;
++ addr |= (off & 0xFC);
++ val = pcicore_read32(pc, addr);
+ }
+ } else {
+ addr = bcma_get_cfgspace_addr(pc, dev, func, off);
+@@ -192,12 +196,10 @@ static int bcma_extpci_write_config(stru
+
+ switch (len) {
+ case 1:
+- val = readl(mmio);
+ val &= ~(0xFF << (8 * (off & 3)));
+ val |= *((const u8 *)buf) << (8 * (off & 3));
+ break;
+ case 2:
+- val = readl(mmio);
+ val &= ~(0xFFFF << (8 * (off & 3)));
+ val |= *((const u16 *)buf) << (8 * (off & 3));
+ break;
+@@ -205,13 +207,14 @@ static int bcma_extpci_write_config(stru
+ val = *((const u32 *)buf);
+ break;
+ }
+- if (dev == 0 && !addr) {
++ if (dev == 0) {
+ /* accesses to config registers with offsets >= 256
+ * requires indirect access.
+ */
+- addr = (func << 12);
+- addr |= (off & 0x0FFF);
+- bcma_pcie_write_config(pc, addr, val);
++ if (off >= PCI_CONFIG_SPACE_SIZE)
++ bcma_pcie_write_config(pc, addr, val);
++ else
++ pcicore_write32(pc, addr, val);
+ } else {
+ writel(val, mmio);
+