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path: root/arch/sh/drivers/pci/pci.c
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Diffstat (limited to 'arch/sh/drivers/pci/pci.c')
-rw-r--r--arch/sh/drivers/pci/pci.c173
1 files changed, 138 insertions, 35 deletions
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index c481df63902..953af139e23 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -33,15 +33,22 @@ static int pci_initialized;
static void __devinit pcibios_scanbus(struct pci_channel *hose)
{
static int next_busno;
+ static int need_domain_info;
struct pci_bus *bus;
bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
+ hose->bus = bus;
+
+ need_domain_info = need_domain_info || hose->index;
+ hose->need_domain_info = need_domain_info;
if (bus) {
next_busno = bus->subordinate + 1;
/* Don't allow 8-bit bus number overflow inside the hose -
reserve some space for bridges. */
- if (next_busno > 224)
+ if (next_busno > 224) {
next_busno = 0;
+ need_domain_info = 1;
+ }
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
@@ -51,10 +58,21 @@ static void __devinit pcibios_scanbus(struct pci_channel *hose)
static DEFINE_MUTEX(pci_scan_mutex);
-void __devinit register_pci_controller(struct pci_channel *hose)
+int __devinit register_pci_controller(struct pci_channel *hose)
{
- request_resource(&iomem_resource, hose->mem_resource);
- request_resource(&ioport_resource, hose->io_resource);
+ 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;
hose_tail = &hose->next;
@@ -68,6 +86,11 @@ void __devinit register_pci_controller(struct pci_channel *hose)
}
/*
+ * Setup the ERR/PERR and SERR timers, if available.
+ */
+ pcibios_enable_timers(hose);
+
+ /*
* Scan the bus if it is register after the PCI subsystem
* initialization.
*/
@@ -76,6 +99,15 @@ void __devinit register_pci_controller(struct pci_channel *hose)
pcibios_scanbus(hose);
mutex_unlock(&pci_scan_mutex);
}
+
+ 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;
}
static int __init pcibios_init(void)
@@ -127,11 +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) {
@@ -148,34 +182,29 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus)
* addresses to be allocated in the 0x000-0x0ff region
* modulo 0x400.
*/
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, const 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) {
+ if (start & 0x300)
start = (start + 0x3ff) & ~0x3ff;
- res->start = start;
- }
- } 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;
+ return start;
}
void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
- struct resource *res)
+ struct resource *res)
{
struct pci_channel *hose = dev->sysdata;
unsigned long offset = 0;
@@ -189,9 +218,8 @@ void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
region->end = res->end - offset;
}
-void __devinit
-pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
- struct pci_bus_region *region)
+void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+ struct pci_bus_region *region)
{
struct pci_channel *hose = dev->sysdata;
unsigned long offset = 0;
@@ -274,6 +302,86 @@ char * __devinit pcibios_setup(char *str)
return str;
}
+static void __init
+pcibios_bus_report_status_early(struct pci_channel *hose,
+ int top_bus, int current_bus,
+ unsigned int status_mask, int warn)
+{
+ unsigned int pci_devfn;
+ u16 status;
+ int ret;
+
+ for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
+ if (PCI_FUNC(pci_devfn))
+ continue;
+ ret = early_read_config_word(hose, top_bus, current_bus,
+ pci_devfn, PCI_STATUS, &status);
+ if (ret != PCIBIOS_SUCCESSFUL)
+ continue;
+ if (status == 0xffff)
+ continue;
+
+ early_write_config_word(hose, top_bus, current_bus,
+ pci_devfn, PCI_STATUS,
+ status & status_mask);
+ if (warn)
+ printk("(%02x:%02x: %04X) ", current_bus,
+ pci_devfn, status);
+ }
+}
+
+/*
+ * We can't use pci_find_device() here since we are
+ * called from interrupt context.
+ */
+static void __init_refok
+pcibios_bus_report_status(struct pci_bus *bus, unsigned int status_mask,
+ int warn)
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ u16 status;
+
+ /*
+ * ignore host bridge - we handle
+ * that separately
+ */
+ if (dev->bus->number == 0 && dev->devfn == 0)
+ continue;
+
+ pci_read_config_word(dev, PCI_STATUS, &status);
+ if (status == 0xffff)
+ continue;
+
+ if ((status & status_mask) == 0)
+ continue;
+
+ /* clear the status errors */
+ pci_write_config_word(dev, PCI_STATUS, status & status_mask);
+
+ if (warn)
+ printk("(%s: %04X) ", pci_name(dev), status);
+ }
+
+ list_for_each_entry(dev, &bus->devices, bus_list)
+ if (dev->subordinate)
+ pcibios_bus_report_status(dev->subordinate, status_mask, warn);
+}
+
+void __init_refok pcibios_report_status(unsigned int status_mask, int warn)
+{
+ struct pci_channel *hose;
+
+ for (hose = hose_head; hose; hose = hose->next) {
+ if (unlikely(!hose->bus))
+ pcibios_bus_report_status_early(hose, hose_head->index,
+ hose->index, status_mask, warn);
+ else
+ pcibios_bus_report_status(hose->bus, status_mask, warn);
+ }
+}
+
int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
enum pci_mmap_state mmap_state, int write_combine)
{
@@ -302,9 +410,15 @@ static void __iomem *ioport_map_pci(struct pci_dev *dev,
{
struct pci_channel *chan = dev->sysdata;
- if (!chan->io_map_base)
+ if (unlikely(!chan->io_map_base)) {
chan->io_map_base = generic_io_base;
+ if (pci_domains_supported)
+ panic("To avoid data corruption io_map_base MUST be "
+ "set with multiple PCI domains.");
+ }
+
+
return (void __iomem *)(chan->io_map_base + port);
}
@@ -321,20 +435,9 @@ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
if (flags & IORESOURCE_IO)
return ioport_map_pci(dev, start, len);
-
- /*
- * Presently the IORESOURCE_MEM case is a bit special, most
- * SH7751 style PCI controllers have PCI memory at a fixed
- * location in the address space where no remapping is desired.
- * With the IORESOURCE_MEM case more care has to be taken
- * to inhibit page table mapping for legacy cores, but this is
- * punted off to __ioremap().
- * -- PFM.
- */
if (flags & IORESOURCE_MEM) {
if (flags & IORESOURCE_CACHEABLE)
return ioremap(start, len);
-
return ioremap_nocache(start, len);
}