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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-19 18:08:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-19 18:08:06 -0700
commit08b5d06ec6cff1d952f13cfcffcbf41ff0ce2c86 (patch)
tree0d087f009b80bdf54f22fdb78437af790c1afc27
parent13588209aa90d9c8e502750fc86160314555612f (diff)
parent5d94e81f69d4b1d1102d3ab557ce0a817c11fbbb (diff)
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Introduce pci_map_biosrom() x86, olpc: Use device tree for platform identification
-rw-r--r--arch/x86/Kconfig2
-rw-r--r--arch/x86/include/asm/olpc_ofw.h9
-rw-r--r--arch/x86/include/asm/probe_roms.h8
-rw-r--r--arch/x86/include/asm/setup.h2
-rw-r--r--arch/x86/kernel/Makefile2
-rw-r--r--arch/x86/kernel/head32.c1
-rw-r--r--arch/x86/kernel/probe_roms.c (renamed from arch/x86/kernel/probe_roms_32.c)101
-rw-r--r--arch/x86/kernel/x86_init.c2
-rw-r--r--arch/x86/platform/olpc/Makefile4
-rw-r--r--arch/x86/platform/olpc/olpc.c51
-rw-r--r--arch/x86/platform/olpc/olpc_dt.c19
11 files changed, 163 insertions, 38 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0a1fe60037f2..4168e5d8632a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2069,7 +2069,7 @@ config OLPC
depends on !X86_PAE
select GPIOLIB
select OF
- select OF_PROMTREE if PROC_DEVICETREE
+ select OF_PROMTREE
---help---
Add support for detecting the unique features of the OLPC
XO hardware.
diff --git a/arch/x86/include/asm/olpc_ofw.h b/arch/x86/include/asm/olpc_ofw.h
index c5d3a5abbb9f..24487712e0b1 100644
--- a/arch/x86/include/asm/olpc_ofw.h
+++ b/arch/x86/include/asm/olpc_ofw.h
@@ -26,15 +26,12 @@ extern void setup_olpc_ofw_pgd(void);
/* check if OFW was detected during boot */
extern bool olpc_ofw_present(void);
+extern void olpc_dt_build_devicetree(void);
+
#else /* !CONFIG_OLPC */
static inline void olpc_ofw_detect(void) { }
static inline void setup_olpc_ofw_pgd(void) { }
-#endif /* !CONFIG_OLPC */
-
-#ifdef CONFIG_OF_PROMTREE
-extern void olpc_dt_build_devicetree(void);
-#else
static inline void olpc_dt_build_devicetree(void) { }
-#endif
+#endif /* !CONFIG_OLPC */
#endif /* _ASM_X86_OLPC_OFW_H */
diff --git a/arch/x86/include/asm/probe_roms.h b/arch/x86/include/asm/probe_roms.h
new file mode 100644
index 000000000000..4950a0b1d09c
--- /dev/null
+++ b/arch/x86/include/asm/probe_roms.h
@@ -0,0 +1,8 @@
+#ifndef _PROBE_ROMS_H_
+#define _PROBE_ROMS_H_
+struct pci_dev;
+
+extern void __iomem *pci_map_biosrom(struct pci_dev *pdev);
+extern void pci_unmap_biosrom(void __iomem *rom);
+extern size_t pci_biosrom_size(struct pci_dev *pdev);
+#endif
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index 647d8a06ce4f..9756551ec760 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -104,10 +104,10 @@ void *extend_brk(size_t size, size_t align);
type *name; \
RESERVE_BRK(name, sizeof(type) * entries)
+extern void probe_roms(void);
#ifdef __i386__
void __init i386_start_kernel(void);
-extern void probe_roms(void);
#else
void __init x86_64_start_kernel(char *real_mode);
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 97ebf82e0b7f..250806472a7e 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -36,7 +36,7 @@ obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y += time.o ioport.o ldt.o dumpstack.o
obj-y += setup.o x86_init.o i8259.o irqinit.o jump_label.o
obj-$(CONFIG_IRQ_WORK) += irq_work.o
-obj-$(CONFIG_X86_32) += probe_roms_32.o
+obj-y += probe_roms.o
obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o
obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o
obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index d6d6bb361931..3bb08509a7a1 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -23,7 +23,6 @@
static void __init i386_default_early_setup(void)
{
/* Initialize 32bit specific setup functions */
- x86_init.resources.probe_roms = probe_roms;
x86_init.resources.reserve_resources = i386_reserve_resources;
x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc;
diff --git a/arch/x86/kernel/probe_roms_32.c b/arch/x86/kernel/probe_roms.c
index 071e7fea42e5..ba0a4cce53be 100644
--- a/arch/x86/kernel/probe_roms_32.c
+++ b/arch/x86/kernel/probe_roms.c
@@ -73,6 +73,107 @@ static struct resource video_rom_resource = {
.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
};
+/* does this oprom support the given pci device, or any of the devices
+ * that the driver supports?
+ */
+static bool match_id(struct pci_dev *pdev, unsigned short vendor, unsigned short device)
+{
+ struct pci_driver *drv = pdev->driver;
+ const struct pci_device_id *id;
+
+ if (pdev->vendor == vendor && pdev->device == device)
+ return true;
+
+ for (id = drv ? drv->id_table : NULL; id && id->vendor; id++)
+ if (id->vendor == vendor && id->device == device)
+ break;
+
+ return id && id->vendor;
+}
+
+static bool probe_list(struct pci_dev *pdev, unsigned short vendor,
+ const unsigned char *rom_list)
+{
+ unsigned short device;
+
+ do {
+ if (probe_kernel_address(rom_list, device) != 0)
+ device = 0;
+
+ if (device && match_id(pdev, vendor, device))
+ break;
+
+ rom_list += 2;
+ } while (device);
+
+ return !!device;
+}
+
+static struct resource *find_oprom(struct pci_dev *pdev)
+{
+ struct resource *oprom = NULL;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(adapter_rom_resources); i++) {
+ struct resource *res = &adapter_rom_resources[i];
+ unsigned short offset, vendor, device, list, rev;
+ const unsigned char *rom;
+
+ if (res->end == 0)
+ break;
+
+ rom = isa_bus_to_virt(res->start);
+ if (probe_kernel_address(rom + 0x18, offset) != 0)
+ continue;
+
+ if (probe_kernel_address(rom + offset + 0x4, vendor) != 0)
+ continue;
+
+ if (probe_kernel_address(rom + offset + 0x6, device) != 0)
+ continue;
+
+ if (match_id(pdev, vendor, device)) {
+ oprom = res;
+ break;
+ }
+
+ if (probe_kernel_address(rom + offset + 0x8, list) == 0 &&
+ probe_kernel_address(rom + offset + 0xc, rev) == 0 &&
+ rev >= 3 && list &&
+ probe_list(pdev, vendor, rom + offset + list)) {
+ oprom = res;
+ break;
+ }
+ }
+
+ return oprom;
+}
+
+void *pci_map_biosrom(struct pci_dev *pdev)
+{
+ struct resource *oprom = find_oprom(pdev);
+
+ if (!oprom)
+ return NULL;
+
+ return ioremap(oprom->start, resource_size(oprom));
+}
+EXPORT_SYMBOL(pci_map_biosrom);
+
+void pci_unmap_biosrom(void __iomem *image)
+{
+ iounmap(image);
+}
+EXPORT_SYMBOL(pci_unmap_biosrom);
+
+size_t pci_biosrom_size(struct pci_dev *pdev)
+{
+ struct resource *oprom = find_oprom(pdev);
+
+ return oprom ? resource_size(oprom) : 0;
+}
+EXPORT_SYMBOL(pci_biosrom_size);
+
#define ROMSIGNATURE 0xaa55
static int __init romsignature(const unsigned char *rom)
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 75ef4b18e9b7..6f164bd5e14d 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -35,7 +35,7 @@ void iommu_shutdown_noop(void) { }
struct x86_init_ops x86_init __initdata = {
.resources = {
- .probe_roms = x86_init_noop,
+ .probe_roms = probe_roms,
.reserve_resources = reserve_standard_io_resources,
.memory_setup = default_machine_specific_memory_setup,
},
diff --git a/arch/x86/platform/olpc/Makefile b/arch/x86/platform/olpc/Makefile
index c2a8cab65e5d..81c5e2165c24 100644
--- a/arch/x86/platform/olpc/Makefile
+++ b/arch/x86/platform/olpc/Makefile
@@ -1,4 +1,2 @@
-obj-$(CONFIG_OLPC) += olpc.o
+obj-$(CONFIG_OLPC) += olpc.o olpc_ofw.o olpc_dt.o
obj-$(CONFIG_OLPC_XO1) += olpc-xo1.o
-obj-$(CONFIG_OLPC) += olpc_ofw.o
-obj-$(CONFIG_OF_PROMTREE) += olpc_dt.o
diff --git a/arch/x86/platform/olpc/olpc.c b/arch/x86/platform/olpc/olpc.c
index edaf3fe8dc5e..0060fd59ea00 100644
--- a/arch/x86/platform/olpc/olpc.c
+++ b/arch/x86/platform/olpc/olpc.c
@@ -18,6 +18,7 @@
#include <linux/io.h>
#include <linux/string.h>
#include <linux/platform_device.h>
+#include <linux/of.h>
#include <asm/geode.h>
#include <asm/setup.h>
@@ -187,41 +188,43 @@ err:
}
EXPORT_SYMBOL_GPL(olpc_ec_cmd);
-static bool __init check_ofw_architecture(void)
+static bool __init check_ofw_architecture(struct device_node *root)
{
- size_t propsize;
- char olpc_arch[5];
- const void *args[] = { NULL, "architecture", olpc_arch, (void *)5 };
- void *res[] = { &propsize };
+ const char *olpc_arch;
+ int propsize;
- if (olpc_ofw("getprop", args, res)) {
- printk(KERN_ERR "ofw: getprop call failed!\n");
- return false;
- }
+ olpc_arch = of_get_property(root, "architecture", &propsize);
return propsize == 5 && strncmp("OLPC", olpc_arch, 5) == 0;
}
-static u32 __init get_board_revision(void)
+static u32 __init get_board_revision(struct device_node *root)
{
- size_t propsize;
- __be32 rev;
- const void *args[] = { NULL, "board-revision-int", &rev, (void *)4 };
- void *res[] = { &propsize };
-
- if (olpc_ofw("getprop", args, res) || propsize != 4) {
- printk(KERN_ERR "ofw: getprop call failed!\n");
- return cpu_to_be32(0);
- }
- return be32_to_cpu(rev);
+ int propsize;
+ const __be32 *rev;
+
+ rev = of_get_property(root, "board-revision-int", &propsize);
+ if (propsize != 4)
+ return 0;
+
+ return be32_to_cpu(*rev);
}
static bool __init platform_detect(void)
{
- if (!check_ofw_architecture())
+ struct device_node *root = of_find_node_by_path("/");
+ bool success;
+
+ if (!root)
return false;
- olpc_platform_info.flags |= OLPC_F_PRESENT;
- olpc_platform_info.boardrev = get_board_revision();
- return true;
+
+ success = check_ofw_architecture(root);
+ if (success) {
+ olpc_platform_info.boardrev = get_board_revision(root);
+ olpc_platform_info.flags |= OLPC_F_PRESENT;
+ }
+
+ of_node_put(root);
+ return success;
}
static int __init add_xo1_platform_devices(void)
diff --git a/arch/x86/platform/olpc/olpc_dt.c b/arch/x86/platform/olpc/olpc_dt.c
index 044bda5b3174..d39f63d017d2 100644
--- a/arch/x86/platform/olpc/olpc_dt.c
+++ b/arch/x86/platform/olpc/olpc_dt.c
@@ -19,7 +19,9 @@
#include <linux/kernel.h>
#include <linux/bootmem.h>
#include <linux/of.h>
+#include <linux/of_platform.h>
#include <linux/of_pdt.h>
+#include <asm/olpc.h>
#include <asm/olpc_ofw.h>
static phandle __init olpc_dt_getsibling(phandle node)
@@ -180,3 +182,20 @@ void __init olpc_dt_build_devicetree(void)
pr_info("PROM DT: Built device tree with %u bytes of memory.\n",
prom_early_allocated);
}
+
+/* A list of DT node/bus matches that we want to expose as platform devices */
+static struct of_device_id __initdata of_ids[] = {
+ { .compatible = "olpc,xo1-battery" },
+ { .compatible = "olpc,xo1-dcon" },
+ { .compatible = "olpc,xo1-rtc" },
+ {},
+};
+
+static int __init olpc_create_platform_devices(void)
+{
+ if (machine_is_olpc())
+ return of_platform_bus_probe(NULL, of_ids, NULL);
+ else
+ return 0;
+}
+device_initcall(olpc_create_platform_devices);

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