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cns3xxx: fix pcie root bridge topology

Browse source 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 43403
This commit is contained in:
Felix Fietkau 2014-11-27 15:02:05 +00:00
parent 40e8649947
commit d57b64dfb0
2 changed files with 55 additions and 2 deletions
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4
target/linux/cns3xxx/patches-3.14/110-pci_isolated_interrupts.patch
View file

@ -30,7 +30,7 @@
#include <linux/gpio.h>
#include <linux/dma-mapping.h>
#include <linux/serial_core.h>
@@ -868,12 +869,42 @@ static int laguna_register_gpio(struct g
@@ -873,12 +874,42 @@ static int laguna_register_gpio(struct g
return ret;
}
@ -74,7 +74,7 @@
}
subsys_initcall(laguna_pcie_init);
@@ -888,8 +919,33 @@ static int __init laguna_model_setup(voi
@@ -893,8 +924,33 @@ static int __init laguna_model_setup(voi
printk("Running on Gateworks Laguna %s\n", laguna_info.model);
cns3xxx_gpio_init( 0, 32, CNS3XXX_GPIOA_BASE_VIRT, IRQ_CNS3XXX_GPIOA,
NR_IRQS_CNS3XXX);

53
target/linux/cns3xxx/patches-3.14/120-backport_pcie_topology_fix.patch Normal file
View file

@ -0,0 +1,53 @@
--- a/arch/arm/mach-cns3xxx/pcie.c
+++ b/arch/arm/mach-cns3xxx/pcie.c
@@ -71,7 +71,7 @@ static void __iomem *cns3xxx_pci_cfg_bas
void __iomem *base;
/* If there is no link, just show the CNS PCI bridge. */
- if (!cnspci->linked && (busno > 0 || slot > 0))
+ if (!cnspci->linked && (busno > 0))
return NULL;
/*
@@ -80,15 +80,19 @@ static void __iomem *cns3xxx_pci_cfg_bas
* the first device on the same bus as the CNS PCI bridge.
*/
if (busno == 0) {
- if (slot > 1)
+ type = CNS3XXX_HOST_TYPE;
+ if (devfn)
+ return NULL;
+ } else if (busno == 1) {
+ type = CNS3XXX_CFG0_TYPE;
+ if (slot)
return NULL;
- type = slot;
} else {
type = CNS3XXX_CFG1_TYPE;
}
base = (void __iomem *)cnspci->cfg_bases[type].virtual;
- offset = ((busno & 0xf) << 20) | (devfn << 12) | (where & 0xffc);
+ offset = (devfn << 12) | (where & 0xffc);
return base + offset;
}
@@ -256,7 +260,7 @@ static struct pci_ops cns3xxx_pcie_ops =
static int cns3xxx_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct cns3xxx_pcie *cnspci = pdev_to_cnspci(dev);
- int irq = cnspci->irqs[slot+pin-1];
+ int irq = cnspci->irqs[!!dev->bus->number+pin-1];
pr_info("PCIe map irq: %04d:%02x:%02x.%02x slot %d, pin %d, irq: %d\n",
pci_domain_nr(dev->bus), dev->bus->number, PCI_SLOT(dev->devfn),
@@ -434,7 +438,8 @@ static void __init cns3xxx_pcie_hw_init(
return;
/* Set Device Max_Read_Request_Size to 128 byte */
- devfn = PCI_DEVFN(1, 0);
+ bus.number = 1;
+ devfn = PCI_DEVFN(0, 0);
pos = pci_bus_find_capability(&bus, devfn, PCI_CAP_ID_EXP);
pci_bus_read_config_word(&bus, devfn, pos + PCI_EXP_DEVCTL, &dc);
dc &= ~(0x3 << 12); /* Clear Device Control Register [14:12] */