added PCI expansion ROM support,

works for some ATI and Nvidia AGP cards now.


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1851 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 82 insertions, 0 deletions

diff --git a/src/devices/pci_rom.c b/src/devices/pci_rom.c
new file mode 100644
index 0000000000..1869a5b74c
--- /dev/null
+++ b/src/devices/pci_rom.c
@@ -0,0 +1,82 @@
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+
+struct rom_header * pci_rom_probe(struct device *dev)
+{
+	unsigned long rom_address;
+	struct rom_header *rom_header;
+	struct pci_data *rom_data;
+
+	rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
+	if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
+		/* FixME: search in the LinuxBIOS Image for integrated
+		 * devices? */
+		return NULL;
+	}
+
+	printk_debug("%s, rom address for %s = %x\n",
+		     __func__, dev_path(dev), rom_address);
+
+	/* enable expansion ROM address decoding */
+	pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address|PCI_ROM_ADDRESS_ENABLE);
+
+	rom_header = rom_address;
+	printk_debug("%s, PCI Expansion ROM, signature 0x%04x, \n\t"
+		     "INIT size 0x%04x, data ptr 0x%04x\n",
+		     __func__, le32_to_cpu(rom_header->signature),
+		     rom_header->size * 512, le32_to_cpu(rom_header->data));
+	if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
+		printk_err("%s, Incorrect Expansion ROM Header Signature %04x\n",
+			   __func__, le32_to_cpu(rom_header->signature));
+		return NULL;
+	}
+
+	rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
+	printk_debug("%s, PCI ROM Image,  Vendor %04x, Device %04x,\n",
+		     __func__, rom_data->vendor, rom_data->device);
+	if (dev->vendor != rom_data->vendor || dev->device != rom_data->device) {
+		printk_err("%s, Device or Vendor ID mismatch\n");
+		return NULL;
+	}
+
+	printk_debug("%s, PCI ROM Image,  Class Code %02x%04x, Code Type %02x\n",
+		     __func__, rom_data->class_hi, rom_data->class_lo,
+		     rom_data->type);
+	if ((dev->class >> 8) != (rom_data->class_hi << 16 | rom_data->class_lo)) {
+		printk_err("%s, Class Code mismatch %x\n",
+			   __func__, dev->class);
+		return NULL;
+	}
+
+	return rom_header;
+}
+
+static void *pci_ram_image_start = PCI_RAM_IMAGE_START;
+struct rom_header *pci_rom_load(struct device *dev, struct rom_header *rom_header)
+{
+	struct pci_data * rom_data;
+	unsigned long rom_address;
+	unsigned int rom_size;
+
+	rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
+	rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
+	rom_size = rom_header->size*512;
+
+	if (PCI_CLASS_DISPLAY_VGA == (rom_data->class_hi << 16 | rom_data->class_lo)) {
+		printk_debug("%s, copying VGA ROM Image from %x to %x, %x bytes\n",
+			     __func__, rom_header, PCI_VGA_RAM_IMAGE_START, rom_size);
+		memcpy(PCI_VGA_RAM_IMAGE_START, rom_header, rom_size);
+		return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
+	} else {
+		printk_debug("%s, copying non-VGA ROM Image from %x to %x, %x bytes\n",
+			     __func__, rom_header, pci_ram_image_start, rom_size);
+		memcpy(pci_ram_image_start, rom_header, rom_size);
+		pci_ram_image_start += rom_size;
+		return (struct rom_header *) pci_ram_image_start;
+	}
+	/* disable expansion ROM address decoding */
+	pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address & ~PCI_ROM_ADDRESS_ENABLE);
+}