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sh: Hook up ERR/PERR/SERR detection for SH7780 PCI host controllers.

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These were never handled before, so implement some common infrastructure
to support them, then make use of that in the SH7780-specific code. In
practice there is little here that can not be generalized for SH4 parts,
which will be an incremental change as the 7780/7751 code is gradually
unified.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2010-02-01 16:39:46 +09:00
parent bcf39352eb
commit ef407beefb
5 changed files with 317 additions and 29 deletions
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51
arch/sh/drivers/pci/pci.c
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@@ -78,6 +78,11 @@ int __devinit register_pci_controller(struct pci_channel *hose)
"registering PCI controller with io_map_base unset\n");
}
/*
* 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.
@@ -289,6 +294,52 @@ char * __devinit pcibios_setup(char *str)
return str;
}
/*
* We can't use pci_find_device() here since we are
* called from interrupt context.
*/
static void 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 pcibios_report_status(unsigned int status_mask, int warn)
{
struct pci_channel *hose;
for (hose = hose_head; hose; hose = hose->next)
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)
{