Import of Linux/MIPS 2.1.36

1 files changed, 177 insertions, 0 deletions

diff --git a/arch/mips/kernel/pci.c b/arch/mips/kernel/pci.c
new file mode 100644
index 000000000..e521ecdd9
--- /dev/null
+++ b/arch/mips/kernel/pci.c
@@ -0,0 +1,177 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * MIPS implementation of PCI BIOS services for PCI support.
+ */
+#include <linux/bios32.h>
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include <asm/pci.h>
+
+#ifndef CONFIG_PCI
+
+/*
+ * BIOS32 replacement.
+ */
+unsigned long pcibios_init(unsigned long memory_start, unsigned long memory_end)
+{
+	return memory_start;
+}
+
+#else /* defined(CONFIG_PCI) */
+
+/*
+ * Following the generic parts of the MIPS BIOS32 code.
+ */
+
+int pcibios_present (void)
+{
+	return _pcibios_init != NULL;
+}
+
+/*
+ * Given the vendor and device ids, find the n'th instance of that device
+ * in the system.  
+ */
+int pcibios_find_device (unsigned short vendor, unsigned short device_id,
+			 unsigned short index, unsigned char *bus,
+			 unsigned char *devfn)
+{
+	unsigned int curr = 0;
+	struct pci_dev *dev;
+
+	for (dev = pci_devices; dev; dev = dev->next) {
+		if (dev->vendor == vendor && dev->device == device_id) {
+			if (curr == index) {
+				*devfn = dev->devfn;
+				*bus = dev->bus->number;
+				return PCIBIOS_SUCCESSFUL;
+			}
+			++curr;
+		}
+	}
+	return PCIBIOS_DEVICE_NOT_FOUND;
+}
+
+/*
+ * Given the class, find the n'th instance of that device
+ * in the system.
+ */
+int pcibios_find_class (unsigned int class_code, unsigned short index,
+			unsigned char *bus, unsigned char *devfn)
+{
+	unsigned int curr = 0;
+	struct pci_dev *dev;
+
+	for (dev = pci_devices; dev; dev = dev->next) {
+		if (dev->class == class_code) {
+			if (curr == index) {
+				*devfn = dev->devfn;
+				*bus = dev->bus->number;
+				return PCIBIOS_SUCCESSFUL;
+			}
+			++curr;
+		}
+	}
+	return PCIBIOS_DEVICE_NOT_FOUND;
+}
+
+const char *pcibios_strerror (int error)
+{
+	static char buf[80];
+
+	switch (error) {
+	case PCIBIOS_SUCCESSFUL:
+		return "SUCCESSFUL";
+
+	case PCIBIOS_FUNC_NOT_SUPPORTED:
+		return "FUNC_NOT_SUPPORTED";
+
+	case PCIBIOS_BAD_VENDOR_ID:
+		return "SUCCESSFUL";
+
+	case PCIBIOS_DEVICE_NOT_FOUND:
+		return "DEVICE_NOT_FOUND";
+
+	case PCIBIOS_BAD_REGISTER_NUMBER:
+		return "BAD_REGISTER_NUMBER";
+
+	default:
+		sprintf (buf, "UNKNOWN RETURN 0x%x", error);
+		return buf;
+	}
+}
+
+/*
+ * The functions below are machine specific and must be reimplented for
+ * each PCI chipset configuration.  We just run the hook to the machine
+ * specific implementation.
+ */
+unsigned long (*_pcibios_init)(unsigned long memory_start, unsigned long memory_end);
+unsigned long pcibios_init(unsigned long memory_start, unsigned long memory_end)
+{
+	return _pcibios_init ? _pcibios_init(memory_start, memory_end)
+	                     : memory_start;
+}
+
+unsigned long (*_pcibios_fixup) (unsigned long memory_start,
+                                 unsigned long memory_end);
+unsigned long pcibios_fixup (unsigned long memory_start,
+                             unsigned long memory_end)
+{
+	return _pcibios_fixup(memory_start, memory_end);
+}
+
+int (*_pcibios_read_config_byte) (unsigned char bus, unsigned char dev_fn,
+                                  unsigned char where, unsigned char *val);
+int pcibios_read_config_byte (unsigned char bus, unsigned char dev_fn,
+                              unsigned char where, unsigned char *val)
+{
+	return _pcibios_read_config_byte(bus, dev_fn, where, val);
+}
+
+int (*_pcibios_read_config_word) (unsigned char bus, unsigned char dev_fn,
+                                  unsigned char where, unsigned short *val);
+int pcibios_read_config_word (unsigned char bus, unsigned char dev_fn,
+                              unsigned char where, unsigned short *val)
+{
+	return _pcibios_read_config_word(bus, dev_fn, where, val);
+}
+
+int (*_pcibios_read_config_dword) (unsigned char bus, unsigned char dev_fn,
+                                   unsigned char where, unsigned int *val);
+int pcibios_read_config_dword (unsigned char bus, unsigned char dev_fn,
+                               unsigned char where, unsigned int *val)
+{
+	return _pcibios_read_config_dword(bus, dev_fn, where, val);
+}
+
+int (*_pcibios_write_config_byte) (unsigned char bus, unsigned char dev_fn,
+                                   unsigned char where, unsigned char val);
+int pcibios_write_config_byte (unsigned char bus, unsigned char dev_fn,
+                               unsigned char where, unsigned char val)
+{
+	return _pcibios_write_config_byte(bus, dev_fn, where, val);
+}
+
+int (*_pcibios_write_config_word) (unsigned char bus, unsigned char dev_fn,
+                                   unsigned char where, unsigned short val);
+int pcibios_write_config_word (unsigned char bus, unsigned char dev_fn,
+                               unsigned char where, unsigned short val)
+{
+	return _pcibios_write_config_word(bus, dev_fn, where, val);
+}
+
+int (*_pcibios_write_config_dword) (unsigned char bus, unsigned char dev_fn,
+                                    unsigned char where, unsigned int val);
+int pcibios_write_config_dword (unsigned char bus, unsigned char dev_fn,
+                                unsigned char where, unsigned int val)
+{
+	return _pcibios_write_config_dword(bus, dev_fn, where, val);
+}
+
+#endif /* defined(CONFIG_PCI) */