aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/ar71xx/patches-3.3/108-MIPS-ath79-fix-broken-ar724x_pci_-read-write-functio.patch
diff options
context:
space:
mode:
authorblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-10-05 10:12:53 +0000
committerblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-10-05 10:12:53 +0000
commit5c105d9f3fd086aff195d3849dcf847d6b0bd927 (patch)
tree1229a11f725bfa58aa7c57a76898553bb5f6654a /target/linux/ar71xx/patches-3.3/108-MIPS-ath79-fix-broken-ar724x_pci_-read-write-functio.patch
downloadopenwrt-5c105d9f3fd086aff195d3849dcf847d6b0bd927.tar.gz
openwrt-5c105d9f3fd086aff195d3849dcf847d6b0bd927.zip
branch Attitude Adjustment
git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar71xx/patches-3.3/108-MIPS-ath79-fix-broken-ar724x_pci_-read-write-functio.patch')
-rw-r--r--target/linux/ar71xx/patches-3.3/108-MIPS-ath79-fix-broken-ar724x_pci_-read-write-functio.patch134
1 files changed, 134 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.3/108-MIPS-ath79-fix-broken-ar724x_pci_-read-write-functio.patch b/target/linux/ar71xx/patches-3.3/108-MIPS-ath79-fix-broken-ar724x_pci_-read-write-functio.patch
new file mode 100644
index 000000000..97db6de9a
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.3/108-MIPS-ath79-fix-broken-ar724x_pci_-read-write-functio.patch
@@ -0,0 +1,134 @@
+From 39f3275077a5b143616fcb3e7a6457a5c42739ee Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <juhosg@openwrt.org>
+Date: Wed, 14 Mar 2012 10:36:04 +0100
+Subject: [PATCH 13/47] MIPS: ath79: fix broken ar724x_pci_{read,write} functions
+
+The current ar724x_pci_{read,write} functions are
+broken. Due to that, pci_read_config_byte returns
+with bogus values, and pci_write_config_{byte,word}
+unconditionally clears the accessed PCI configuration
+registers instead of changing the value of them.
+
+The patch fixes the broken functions, thus the PCI
+configuration space can be accessed correctly.
+
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+Cc: linux-mips@linux-mips.org
+Patchwork: https://patchwork.linux-mips.org/patch/3493/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ arch/mips/pci/pci-ar724x.c | 52 ++++++++++++++++++++++----------------------
+ 1 files changed, 26 insertions(+), 26 deletions(-)
+
+--- a/arch/mips/pci/pci-ar724x.c
++++ b/arch/mips/pci/pci-ar724x.c
+@@ -22,8 +22,9 @@ static void __iomem *ar724x_pci_devcfg_b
+ static int ar724x_pci_read(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, uint32_t *value)
+ {
+- unsigned long flags, addr, tval, mask;
++ unsigned long flags;
+ void __iomem *base;
++ u32 data;
+
+ if (devfn)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+@@ -31,24 +32,22 @@ static int ar724x_pci_read(struct pci_bu
+ base = ar724x_pci_devcfg_base;
+
+ spin_lock_irqsave(&ar724x_pci_lock, flags);
++ data = __raw_readl(base + (where & ~3));
+
+ switch (size) {
+ case 1:
+- addr = where & ~3;
+- mask = 0xff000000 >> ((where % 4) * 8);
+- tval = __raw_readl(base + addr);
+- tval = tval & ~mask;
+- *value = (tval >> ((4 - (where % 4))*8));
++ if (where & 1)
++ data >>= 8;
++ if (where & 2)
++ data >>= 16;
++ data &= 0xff;
+ break;
+ case 2:
+- addr = where & ~3;
+- mask = 0xffff0000 >> ((where % 4)*8);
+- tval = __raw_readl(base + addr);
+- tval = tval & ~mask;
+- *value = (tval >> ((4 - (where % 4))*8));
++ if (where & 2)
++ data >>= 16;
++ data &= 0xffff;
+ break;
+ case 4:
+- *value = __raw_readl(base + where);
+ break;
+ default:
+ spin_unlock_irqrestore(&ar724x_pci_lock, flags);
+@@ -57,6 +56,7 @@ static int ar724x_pci_read(struct pci_bu
+ }
+
+ spin_unlock_irqrestore(&ar724x_pci_lock, flags);
++ *value = data;
+
+ return PCIBIOS_SUCCESSFUL;
+ }
+@@ -64,8 +64,10 @@ static int ar724x_pci_read(struct pci_bu
+ static int ar724x_pci_write(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, uint32_t value)
+ {
+- unsigned long flags, tval, addr, mask;
++ unsigned long flags;
+ void __iomem *base;
++ u32 data;
++ int s;
+
+ if (devfn)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+@@ -73,26 +75,21 @@ static int ar724x_pci_write(struct pci_b
+ base = ar724x_pci_devcfg_base;
+
+ spin_lock_irqsave(&ar724x_pci_lock, flags);
++ data = __raw_readl(base + (where & ~3));
+
+ switch (size) {
+ case 1:
+- addr = where & ~3;
+- mask = 0xff000000 >> ((where % 4)*8);
+- tval = __raw_readl(base + addr);
+- tval = tval & ~mask;
+- tval |= (value << ((4 - (where % 4))*8)) & mask;
+- __raw_writel(tval, base + addr);
++ s = ((where & 3) * 8);
++ data &= ~(0xff << s);
++ data |= ((value & 0xff) << s);
+ break;
+ case 2:
+- addr = where & ~3;
+- mask = 0xffff0000 >> ((where % 4)*8);
+- tval = __raw_readl(base + addr);
+- tval = tval & ~mask;
+- tval |= (value << ((4 - (where % 4))*8)) & mask;
+- __raw_writel(tval, base + addr);
++ s = ((where & 2) * 8);
++ data &= ~(0xffff << s);
++ data |= ((value & 0xffff) << s);
+ break;
+ case 4:
+- __raw_writel(value, (base + where));
++ data = value;
+ break;
+ default:
+ spin_unlock_irqrestore(&ar724x_pci_lock, flags);
+@@ -100,6 +97,9 @@ static int ar724x_pci_write(struct pci_b
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+
++ __raw_writel(data, base + (where & ~3));
++ /* flush write */
++ __raw_readl(base + (where & ~3));
+ spin_unlock_irqrestore(&ar724x_pci_lock, flags);
+
+ return PCIBIOS_SUCCESSFUL;