aboutsummaryrefslogtreecommitdiff
path: root/arch/sh/drivers/pci/pci.c
diff options
context:
space:
mode:
authorPaul Mundt <lethal@linux-sh.org>2010-02-01 20:01:50 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-02-01 20:01:50 +0900
commitb6c58b1d987a5795086c5c2babd8c7367d2fdb8c (patch)
tree3ec992af50f44dd09ff125165ea1c4ef41b2aecc /arch/sh/drivers/pci/pci.c
parentef407beefbd9928792ccc93857e408e0057bc17b (diff)
sh: Improved multi-resource handling for SH7780 PCI.
The SH7780 PCI controller supports 3 different ranges of PCI memory in addition to its PCI I/O window. In the case of 29-bit mode, only 2 memory windows are supported, while in 32-bit mode all 3 are visible. This attempts to make the resource handling completely dynamic and to permit platforms to map in as many apertures as they can handle. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/drivers/pci/pci.c')
-rw-r--r--arch/sh/drivers/pci/pci.c37
1 files changed, 23 insertions, 14 deletions
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 8e42dfbbe76..f4a69833fce 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -60,11 +60,18 @@ static DEFINE_MUTEX(pci_scan_mutex);
int __devinit register_pci_controller(struct pci_channel *hose)
{
- if (request_resource(&iomem_resource, hose->mem_resource) < 0)
- goto out;
- if (request_resource(&ioport_resource, hose->io_resource) < 0) {
- release_resource(hose->mem_resource);
- goto out;
+ int i;
+
+ for (i = 0; i < hose->nr_resources; i++) {
+ struct resource *res = hose->resources + i;
+
+ if (res->flags & IORESOURCE_IO) {
+ if (request_resource(&ioport_resource, res) < 0)
+ goto out;
+ } else {
+ if (request_resource(&iomem_resource, res) < 0)
+ goto out;
+ }
}
*hose_tail = hose;
@@ -96,6 +103,9 @@ int __devinit register_pci_controller(struct pci_channel *hose)
return 0;
out:
+ for (--i; i >= 0; i--)
+ release_resource(&hose->resources[i]);
+
printk(KERN_WARNING "Skipping PCI bus scan due to resource conflict\n");
return -1;
}
@@ -149,11 +159,13 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus)
{
struct pci_dev *dev = bus->self;
struct list_head *ln;
- struct pci_channel *chan = bus->sysdata;
+ struct pci_channel *hose = bus->sysdata;
if (!dev) {
- bus->resource[0] = chan->io_resource;
- bus->resource[1] = chan->mem_resource;
+ int i;
+
+ for (i = 0; i < hose->nr_resources; i++)
+ bus->resource[i] = hose->resources + i;
}
for (ln = bus->devices.next; ln != &bus->devices; ln = ln->next) {
@@ -174,21 +186,18 @@ void pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
struct pci_dev *dev = data;
- struct pci_channel *chan = dev->sysdata;
+ struct pci_channel *hose = dev->sysdata;
resource_size_t start = res->start;
if (res->flags & IORESOURCE_IO) {
- if (start < PCIBIOS_MIN_IO + chan->io_resource->start)
- start = PCIBIOS_MIN_IO + chan->io_resource->start;
+ if (start < PCIBIOS_MIN_IO + hose->resources[0].start)
+ start = PCIBIOS_MIN_IO + hose->resources[0].start;
/*
* Put everything into 0x00-0xff region modulo 0x400.
*/
if (start & 0x300)
start = (start + 0x3ff) & ~0x3ff;
- } else if (res->flags & IORESOURCE_MEM) {
- if (start < PCIBIOS_MIN_MEM + chan->mem_resource->start)
- start = PCIBIOS_MIN_MEM + chan->mem_resource->start;
}
res->start = start;