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Code Issues

fix PCI resouce allocation for SSB PCI host bridge

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The defined offset is wrong and the fixup-code overrides it
later on so that it never gets used for most PCI devices.
Unfortunately the yenta-socket allocates its own resources
and crashes because of the wrong mem_offset.

It seems that the offset and fixup code came from 2.4 where
resource allocation was handled differently.

This patch removes the unneeded parts and thus enables
the yenta_socket on the WRT54G3G platform.

It was tested on Asus WL500G-Premium (v1 and v2), Linksys
WRT54G3G, Netgear WGT634U

Signed-off-by: Michael Buesch <mb@bu3sch.de>

SVN-Revision: 20239
This commit is contained in:
Markus Wigge 2010-03-16 10:39:37 +00:00
parent 64384f85dc
commit 8bfc53f675
2 changed files with 106 additions and 0 deletions
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53
target/linux/brcm47xx/patches-2.6.32/930-bcm47xx-pci-iomem.patch Normal file
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@ -0,0 +1,53 @@
Index: linux-2.6.33/drivers/ssb/driver_pcicore.c
===================================================================
--- linux-2.6.33.orig/drivers/ssb/driver_pcicore.c 2010-03-15 14:52:55.000000000 +0100
+++ linux-2.6.33/drivers/ssb/driver_pcicore.c 2010-03-15 15:57:38.000000000 +0100
@@ -246,20 +246,12 @@
.pci_ops = &ssb_pcicore_pciops,
.io_resource = &ssb_pcicore_io_resource,
.mem_resource = &ssb_pcicore_mem_resource,
- .mem_offset = 0x24000000,
};
-static u32 ssb_pcicore_pcibus_iobase = 0x100;
-static u32 ssb_pcicore_pcibus_membase = SSB_PCI_DMA;
-
/* This function is called when doing a pci_enable_device().
* We must first check if the device is a device on the PCI-core bridge. */
int ssb_pcicore_plat_dev_init(struct pci_dev *d)
{
- struct resource *res;
- int pos, size;
- u32 *base;
-
if (d->bus->ops != &ssb_pcicore_pciops) {
/* This is not a device on the PCI-core bridge. */
return -ENODEV;
@@ -268,27 +260,6 @@
ssb_printk(KERN_INFO "PCI: Fixing up device %s\n",
pci_name(d));
- /* Fix up resource bases */
- for (pos = 0; pos < 6; pos++) {
- res = &d->resource[pos];
- if (res->flags & IORESOURCE_IO)
- base = &ssb_pcicore_pcibus_iobase;
- else
- base = &ssb_pcicore_pcibus_membase;
- res->flags |= IORESOURCE_PCI_FIXED;
- if (res->end) {
- size = res->end - res->start + 1;
- if (*base & (size - 1))
- *base = (*base + size) & ~(size - 1);
- res->start = *base;
- res->end = res->start + size - 1;
- *base += size;
- pci_write_config_dword(d, PCI_BASE_ADDRESS_0 + (pos << 2), res->start);
- }
- /* Fix up PCI bridge BAR0 only */
- if (d->bus->number == 0 && PCI_SLOT(d->devfn) == 0)
- break;
- }
/* Fix up interrupt lines */
d->irq = ssb_mips_irq(extpci_core->dev) + 2;
pci_write_config_byte(d, PCI_INTERRUPT_LINE, d->irq);

53
target/linux/brcm47xx/patches-2.6.33/930-bcm47xx-pci-iomem.patch Normal file
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@ -0,0 +1,53 @@
Index: linux-2.6.33/drivers/ssb/driver_pcicore.c
===================================================================
--- linux-2.6.33.orig/drivers/ssb/driver_pcicore.c 2010-03-15 14:52:55.000000000 +0100
+++ linux-2.6.33/drivers/ssb/driver_pcicore.c 2010-03-15 15:57:38.000000000 +0100
@@ -246,20 +246,12 @@
.pci_ops = &ssb_pcicore_pciops,
.io_resource = &ssb_pcicore_io_resource,
.mem_resource = &ssb_pcicore_mem_resource,
- .mem_offset = 0x24000000,
};
-static u32 ssb_pcicore_pcibus_iobase = 0x100;
-static u32 ssb_pcicore_pcibus_membase = SSB_PCI_DMA;
-
/* This function is called when doing a pci_enable_device().
* We must first check if the device is a device on the PCI-core bridge. */
int ssb_pcicore_plat_dev_init(struct pci_dev *d)
{
- struct resource *res;
- int pos, size;
- u32 *base;
-
if (d->bus->ops != &ssb_pcicore_pciops) {
/* This is not a device on the PCI-core bridge. */
return -ENODEV;
@@ -268,27 +260,6 @@
ssb_printk(KERN_INFO "PCI: Fixing up device %s\n",
pci_name(d));
- /* Fix up resource bases */
- for (pos = 0; pos < 6; pos++) {
- res = &d->resource[pos];
- if (res->flags & IORESOURCE_IO)
- base = &ssb_pcicore_pcibus_iobase;
- else
- base = &ssb_pcicore_pcibus_membase;
- res->flags |= IORESOURCE_PCI_FIXED;
- if (res->end) {
- size = res->end - res->start + 1;
- if (*base & (size - 1))
- *base = (*base + size) & ~(size - 1);
- res->start = *base;
- res->end = res->start + size - 1;
- *base += size;
- pci_write_config_dword(d, PCI_BASE_ADDRESS_0 + (pos << 2), res->start);
- }
- /* Fix up PCI bridge BAR0 only */
- if (d->bus->number == 0 && PCI_SLOT(d->devfn) == 0)
- break;
- }
/* Fix up interrupt lines */
d->irq = ssb_mips_irq(extpci_core->dev) + 2;
pci_write_config_byte(d, PCI_INTERRUPT_LINE, d->irq);