diff options
author | Dave Jones <davej@redhat.com> | 2006-12-12 17:41:41 -0500 |
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committer | Dave Jones <davej@redhat.com> | 2006-12-12 17:41:41 -0500 |
commit | c4366889dda8110247be59ca41fddb82951a8c26 (patch) | |
tree | 705c1a996bed8fd48ce94ff33ec9fd00f9b94875 /arch/powerpc/platforms/52xx/efika-pci.c | |
parent | db2fb9db5735cc532fd4fc55e94b9a3c3750378e (diff) | |
parent | e1036502e5263851259d147771226161e5ccc85a (diff) |
Merge ../linus
Conflicts:
drivers/cpufreq/cpufreq.c
Diffstat (limited to 'arch/powerpc/platforms/52xx/efika-pci.c')
-rw-r--r-- | arch/powerpc/platforms/52xx/efika-pci.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/52xx/efika-pci.c b/arch/powerpc/platforms/52xx/efika-pci.c new file mode 100644 index 00000000000..62e05b2a922 --- /dev/null +++ b/arch/powerpc/platforms/52xx/efika-pci.c @@ -0,0 +1,119 @@ + +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/string.h> +#include <linux/init.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/prom.h> +#include <asm/machdep.h> +#include <asm/sections.h> +#include <asm/pci-bridge.h> +#include <asm/rtas.h> + +#include "efika.h" + +#ifdef CONFIG_PCI +/* + * Access functions for PCI config space using RTAS calls. + */ +static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset, + int len, u32 * val) +{ + struct pci_controller *hose = bus->sysdata; + unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) + | (((bus->number - hose->first_busno) & 0xff) << 16) + | (hose->index << 24); + int ret = -1; + int rval; + + rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len); + *val = ret; + return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; +} + +static int rtas_write_config(struct pci_bus *bus, unsigned int devfn, + int offset, int len, u32 val) +{ + struct pci_controller *hose = bus->sysdata; + unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) + | (((bus->number - hose->first_busno) & 0xff) << 16) + | (hose->index << 24); + int rval; + + rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL, + addr, len, val); + return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; +} + +static struct pci_ops rtas_pci_ops = { + rtas_read_config, + rtas_write_config +}; + +void __init efika_pcisetup(void) +{ + const int *bus_range; + int len; + struct pci_controller *hose; + struct device_node *root; + struct device_node *pcictrl; + + root = of_find_node_by_path("/"); + if (root == NULL) { + printk(KERN_WARNING EFIKA_PLATFORM_NAME + ": Unable to find the root node\n"); + return; + } + + for (pcictrl = NULL;;) { + pcictrl = of_get_next_child(root, pcictrl); + if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0)) + break; + } + + of_node_put(root); + + if (pcictrl == NULL) { + printk(KERN_WARNING EFIKA_PLATFORM_NAME + ": Unable to find the PCI bridge node\n"); + return; + } + + bus_range = get_property(pcictrl, "bus-range", &len); + if (bus_range == NULL || len < 2 * sizeof(int)) { + printk(KERN_WARNING EFIKA_PLATFORM_NAME + ": Can't get bus-range for %s\n", pcictrl->full_name); + return; + } + + if (bus_range[1] == bus_range[0]) + printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d", + bus_range[0]); + else + printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d", + bus_range[0], bus_range[1]); + printk(" controlled by %s\n", pcictrl->full_name); + printk("\n"); + + hose = pcibios_alloc_controller(); + if (!hose) { + printk(KERN_WARNING EFIKA_PLATFORM_NAME + ": Can't allocate PCI controller structure for %s\n", + pcictrl->full_name); + return; + } + + hose->arch_data = of_node_get(pcictrl); + hose->first_busno = bus_range[0]; + hose->last_busno = bus_range[1]; + hose->ops = &rtas_pci_ops; + + pci_process_bridge_OF_ranges(hose, pcictrl, 0); +} + +#else +void __init efika_pcisetup(void) +{} +#endif |