kernel: fix DMA error when BCM4331 is connected to BCM4706

The BCM4331 supports a PCIe max request size of 512 bytes and uses
that, but the PCIe controller in the BCM4706 just supports 128 Bytes
and that causes a DMA error for packages bigger than 126 bytes. This
fixes the problem by setting the BCM4331 also to 128 Bytes.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 37709

1 files changed, 167 insertions, 0 deletions

diff --git a/target/linux/generic/patches-3.8/026-bcma_pcie_up_down.patch b/target/linux/generic/patches-3.8/026-bcma_pcie_up_down.patch
new file mode 100644
index 0000000000..4dbf685b94
--- /dev/null
+++ b/target/linux/generic/patches-3.8/026-bcma_pcie_up_down.patch
@@ -0,0 +1,167 @@
+bcma patch adding bcma_core_pci_up() and bcma_core_pci_down(), this gets
+called by b43 and brcmsmac
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+
+--- a/drivers/bcma/driver_pci.c
++++ b/drivers/bcma/driver_pci.c
+@@ -31,7 +31,7 @@ static void bcma_pcie_write(struct bcma_
+ 	pcicore_write32(pc, BCMA_CORE_PCI_PCIEIND_DATA, data);
+ }
+ 
+-static void bcma_pcie_mdio_set_phy(struct bcma_drv_pci *pc, u8 phy)
++static void bcma_pcie_mdio_set_phy(struct bcma_drv_pci *pc, u16 phy)
+ {
+ 	u32 v;
+ 	int i;
+@@ -55,7 +55,7 @@ static void bcma_pcie_mdio_set_phy(struc
+ 	}
+ }
+ 
+-static u16 bcma_pcie_mdio_read(struct bcma_drv_pci *pc, u8 device, u8 address)
++static u16 bcma_pcie_mdio_read(struct bcma_drv_pci *pc, u16 device, u8 address)
+ {
+ 	int max_retries = 10;
+ 	u16 ret = 0;
+@@ -98,7 +98,7 @@ static u16 bcma_pcie_mdio_read(struct bc
+ 	return ret;
+ }
+ 
+-static void bcma_pcie_mdio_write(struct bcma_drv_pci *pc, u8 device,
++static void bcma_pcie_mdio_write(struct bcma_drv_pci *pc, u16 device,
+ 				u8 address, u16 data)
+ {
+ 	int max_retries = 10;
+@@ -137,6 +137,13 @@ static void bcma_pcie_mdio_write(struct
+ 	pcicore_write32(pc, BCMA_CORE_PCI_MDIO_CONTROL, 0);
+ }
+ 
++static u16 bcma_pcie_mdio_writeread(struct bcma_drv_pci *pc, u16 device,
++				    u8 address, u16 data)
++{
++	bcma_pcie_mdio_write(pc, device, address, data);
++	return bcma_pcie_mdio_read(pc, device, address);
++}
++
+ /**************************************************
+  * Workarounds.
+  **************************************************/
+@@ -203,6 +210,25 @@ static void bcma_core_pci_config_fixup(s
+ 	}
+ }
+ 
++static void bcma_core_pci_power_save(struct bcma_drv_pci *pc, bool up)
++{
++	u16 data;
++
++	if (pc->core->id.rev >= 15 && pc->core->id.rev <= 20) {
++		data = up ? 0x74 : 0x7C;
++		bcma_pcie_mdio_writeread(pc, BCMA_CORE_PCI_MDIO_BLK1,
++					 BCMA_CORE_PCI_MDIO_BLK1_MGMT1, 0x7F64);
++		bcma_pcie_mdio_writeread(pc, BCMA_CORE_PCI_MDIO_BLK1,
++					 BCMA_CORE_PCI_MDIO_BLK1_MGMT3, data);
++	} else if (pc->core->id.rev >= 21 && pc->core->id.rev <= 22) {
++		data = up ? 0x75 : 0x7D;
++		bcma_pcie_mdio_writeread(pc, BCMA_CORE_PCI_MDIO_BLK1,
++					 BCMA_CORE_PCI_MDIO_BLK1_MGMT1, 0x7E65);
++		bcma_pcie_mdio_writeread(pc, BCMA_CORE_PCI_MDIO_BLK1,
++					 BCMA_CORE_PCI_MDIO_BLK1_MGMT3, data);
++	}
++}
++
+ /**************************************************
+  * Init.
+  **************************************************/
+@@ -262,7 +288,7 @@ out:
+ }
+ EXPORT_SYMBOL_GPL(bcma_core_pci_irq_ctl);
+ 
+-void bcma_core_pci_extend_L1timer(struct bcma_drv_pci *pc, bool extend)
++static void bcma_core_pci_extend_L1timer(struct bcma_drv_pci *pc, bool extend)
+ {
+ 	u32 w;
+ 
+@@ -274,4 +300,38 @@ void bcma_core_pci_extend_L1timer(struct
+ 	bcma_pcie_write(pc, BCMA_CORE_PCI_DLLP_PMTHRESHREG, w);
+ 	bcma_pcie_read(pc, BCMA_CORE_PCI_DLLP_PMTHRESHREG);
+ }
+-EXPORT_SYMBOL_GPL(bcma_core_pci_extend_L1timer);
++
++void bcma_core_pci_up(struct bcma_bus *bus)
++{
++	struct bcma_drv_pci *pc;
++
++	if (bus->hosttype != BCMA_HOSTTYPE_PCI)
++		return;
++
++	pc = &bus->drv_pci[0];
++
++	bcma_core_pci_power_save(pc, true);
++
++	bcma_core_pci_extend_L1timer(pc, true);
++
++	if ((pc->core->id.rev == 18 || pc->core->id.rev == 19) &&
++	    bus->boardinfo.vendor != PCI_VENDOR_ID_APPLE) {
++		pcie_set_readrq(bus->host_pci, 128);
++	}
++}
++EXPORT_SYMBOL_GPL(bcma_core_pci_up);
++
++void bcma_core_pci_down(struct bcma_bus *bus)
++{
++	struct bcma_drv_pci *pc;
++
++	if (bus->hosttype != BCMA_HOSTTYPE_PCI)
++		return;
++
++	pc = &bus->drv_pci[0];
++
++	bcma_core_pci_extend_L1timer(pc, false);
++
++	bcma_core_pci_power_save(pc, false);
++}
++EXPORT_SYMBOL_GPL(bcma_core_pci_down);
+--- a/include/linux/bcma/bcma_driver_pci.h
++++ b/include/linux/bcma/bcma_driver_pci.h
+@@ -181,10 +181,31 @@ struct pci_dev;
+ 
+ #define BCMA_CORE_PCI_CFG_DEVCTRL		0xd8
+ 
++#define BCMA_CORE_PCI_
++
++/* MDIO devices (SERDES modules) */
++#define BCMA_CORE_PCI_MDIO_IEEE0		0x000
++#define BCMA_CORE_PCI_MDIO_IEEE1		0x001
++#define BCMA_CORE_PCI_MDIO_BLK0			0x800
++#define BCMA_CORE_PCI_MDIO_BLK1			0x801
++#define  BCMA_CORE_PCI_MDIO_BLK1_MGMT0		0x16
++#define  BCMA_CORE_PCI_MDIO_BLK1_MGMT1		0x17
++#define  BCMA_CORE_PCI_MDIO_BLK1_MGMT2		0x18
++#define  BCMA_CORE_PCI_MDIO_BLK1_MGMT3		0x19
++#define  BCMA_CORE_PCI_MDIO_BLK1_MGMT4		0x1A
++#define BCMA_CORE_PCI_MDIO_BLK2			0x802
++#define BCMA_CORE_PCI_MDIO_BLK3			0x803
++#define BCMA_CORE_PCI_MDIO_BLK4			0x804
++#define BCMA_CORE_PCI_MDIO_TXPLL		0x808	/* TXPLL register block idx */
++#define BCMA_CORE_PCI_MDIO_TXCTRL0		0x820
++#define BCMA_CORE_PCI_MDIO_SERDESID		0x831
++#define BCMA_CORE_PCI_MDIO_RXCTRL0		0x840
++
+ /* PCIE Root Capability Register bits (Host mode only) */
+ #define BCMA_CORE_PCI_RC_CRS_VISIBILITY		0x0001
+ 
+ struct bcma_drv_pci;
++struct bcma_bus;
+ 
+ #ifdef CONFIG_BCMA_DRIVER_PCI_HOSTMODE
+ struct bcma_drv_pci_host {
+@@ -219,7 +240,8 @@ struct bcma_drv_pci {
+ extern void bcma_core_pci_init(struct bcma_drv_pci *pc);
+ extern int bcma_core_pci_irq_ctl(struct bcma_drv_pci *pc,
+ 				 struct bcma_device *core, bool enable);
+-extern void bcma_core_pci_extend_L1timer(struct bcma_drv_pci *pc, bool extend);
++extern void bcma_core_pci_up(struct bcma_bus *bus);
++extern void bcma_core_pci_down(struct bcma_bus *bus);
+ 
+ extern int bcma_core_pci_pcibios_map_irq(const struct pci_dev *dev);
+ extern int bcma_core_pci_plat_dev_init(struct pci_dev *dev);