Merge git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq

[linux-2.6-omap-h63xx.git] / arch / ppc / kernel / pci.c

diff --git a/arch/ppc/kernel/pci.c b/arch/ppc/kernel/pci.c
index 63808e01cb0b7cc51ea75c20885c630d8ef63ea4..df3ef6db072c806b7295449ddf70a78499a6258c 100644 (file)
--- a/arch/ppc/kernel/pci.c
+++ b/arch/ppc/kernel/pci.c
@@ -578,39 +578,6 @@ pcibios_assign_resources(void)
 }
 
 
-int
-pcibios_enable_resources(struct pci_dev *dev, int mask)
-{
-       u16 cmd, old_cmd;
-       int idx;
-       struct resource *r;
-
-       pci_read_config_word(dev, PCI_COMMAND, &cmd);
-       old_cmd = cmd;
-       for (idx=0; idx<6; idx++) {
-               /* Only set up the requested stuff */
-               if (!(mask & (1<<idx)))
-                       continue;
-       
-               r = &dev->resource[idx];
-               if (r->flags & IORESOURCE_UNSET) {
-                       printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
-                       return -EINVAL;
-               }
-               if (r->flags & IORESOURCE_IO)
-                       cmd |= PCI_COMMAND_IO;
-               if (r->flags & IORESOURCE_MEM)
-                       cmd |= PCI_COMMAND_MEMORY;
-       }
-       if (dev->resource[PCI_ROM_RESOURCE].start)
-               cmd |= PCI_COMMAND_MEMORY;
-       if (cmd != old_cmd) {
-               printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
-               pci_write_config_word(dev, PCI_COMMAND, cmd);
-       }
-       return 0;
-}
-
 static int next_controller_index;
 
 struct pci_controller * __init
@@ -633,12 +600,6 @@ void pcibios_make_OF_bus_map(void)
 {
 }
 
-/* Add sysfs properties */
-void pcibios_add_platform_entries(struct pci_dev *pdev)
-{
-}
-
-
 static int __init
 pcibios_init(void)
 {
@@ -791,33 +752,11 @@ pcibios_update_irq(struct pci_dev *dev, int irq)
 
 int pcibios_enable_device(struct pci_dev *dev, int mask)
 {
-       u16 cmd, old_cmd;
-       int idx;
-       struct resource *r;
-
        if (ppc_md.pcibios_enable_device_hook)
                if (ppc_md.pcibios_enable_device_hook(dev, 0))
                        return -EINVAL;
-               
-       pci_read_config_word(dev, PCI_COMMAND, &cmd);
-       old_cmd = cmd;
-       for (idx=0; idx<6; idx++) {
-               r = &dev->resource[idx];
-               if (r->flags & IORESOURCE_UNSET) {
-                       printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
-                       return -EINVAL;
-               }
-               if (r->flags & IORESOURCE_IO)
-                       cmd |= PCI_COMMAND_IO;
-               if (r->flags & IORESOURCE_MEM)
-                       cmd |= PCI_COMMAND_MEMORY;
-       }
-       if (cmd != old_cmd) {
-               printk("PCI: Enabling device %s (%04x -> %04x)\n",
-                      pci_name(dev), old_cmd, cmd);
-               pci_write_config_word(dev, PCI_COMMAND, cmd);
-       }
-       return 0;
+
+       return pci_enable_resources(dev, mask);
 }
 
 struct pci_controller*
@@ -879,7 +818,7 @@ pci_resource_to_bus(struct pci_dev *pdev, struct resource *res)
 
 
 static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
-                                              unsigned long *offset,
+                                              resource_size_t *offset,
                                               enum pci_mmap_state mmap_state)
 {
        struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
@@ -891,7 +830,9 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
 
        /* If memory, add on the PCI bridge address offset */
        if (mmap_state == pci_mmap_mem) {
+#if 0 /* See comment in pci_resource_to_user() for why this is disabled */
                *offset += hose->pci_mem_offset;
+#endif
                res_bit = IORESOURCE_MEM;
        } else {
                io_offset = hose->io_base_virt - ___IO_BASE;
@@ -1030,7 +971,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
                        enum pci_mmap_state mmap_state,
                        int write_combine)
 {
-       unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+       resource_size_t offset = vma->vm_pgoff << PAGE_SHIFT;
        struct resource *rp;
        int ret;
 
@@ -1132,21 +1073,42 @@ void pci_resource_to_user(const struct pci_dev *dev, int bar,
                          resource_size_t *start, resource_size_t *end)
 {
        struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
-       unsigned long offset = 0;
+       resource_size_t offset = 0;
 
        if (hose == NULL)
                return;
 
        if (rsrc->flags & IORESOURCE_IO)
-               offset = ___IO_BASE - hose->io_base_virt + hose->io_base_phys;
+               offset = (unsigned long)hose->io_base_virt - _IO_BASE;
+
+       /* We pass a fully fixed up address to userland for MMIO instead of
+        * a BAR value because X is lame and expects to be able to use that
+        * to pass to /dev/mem !
+        *
+        * That means that we'll have potentially 64 bits values where some
+        * userland apps only expect 32 (like X itself since it thinks only
+        * Sparc has 64 bits MMIO) but if we don't do that, we break it on
+        * 32 bits CHRPs :-(
+        *
+        * Hopefully, the sysfs insterface is immune to that gunk. Once X
+        * has been fixed (and the fix spread enough), we can re-enable the
+        * 2 lines below and pass down a BAR value to userland. In that case
+        * we'll also have to re-enable the matching code in
+        * __pci_mmap_make_offset().
+        *
+        * BenH.
+        */
+#if 0
+       else if (rsrc->flags & IORESOURCE_MEM)
+               offset = hose->pci_mem_offset;
+#endif
 
-       *start = rsrc->start + offset;
-       *end = rsrc->end + offset;
+       *start = rsrc->start - offset;
+       *end = rsrc->end - offset;
 }
 
-void __init
-pci_init_resource(struct resource *res, unsigned long start, unsigned long end,
-                 int flags, char *name)
+void __init pci_init_resource(struct resource *res, resource_size_t start,
+                             resource_size_t end, int flags, char *name)
 {
        res->start = start;
        res->end = end;
@@ -1159,8 +1121,8 @@ pci_init_resource(struct resource *res, unsigned long start, unsigned long end,
 
 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
 {
-       unsigned long start = pci_resource_start(dev, bar);
-       unsigned long len = pci_resource_len(dev, bar);
+       resource_size_t start = pci_resource_start(dev, bar);
+       resource_size_t len = pci_resource_len(dev, bar);
        unsigned long flags = pci_resource_flags(dev, bar);
 
        if (!len)