===== drivers/pci/pci-sysfs.c 1.10 vs edited =====
--- 1.10/drivers/pci/pci-sysfs.c	2004-06-04 06:23:04 -07:00
+++ edited/drivers/pci/pci-sysfs.c	2004-08-02 09:57:11 -07:00
@@ -164,6 +164,92 @@
 	return count;
 }
 
+/**
+ * pci_enable_rom - enable ROM decoding for a PCI device
+ * @dev: PCI device to enable
+ *
+ * Enable ROM decoding on @dev.  This involves simply turning on the last
+ * bit of the PCI ROM BAR.  Note that some cards may share address decoders
+ * between the ROM and other resources, so enabling it may disable access
+ * to MMIO registers or other card memory.
+ */
+static void
+pci_enable_rom(struct pci_dev *dev)
+{
+	u32 rom_addr;
+
+	pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_addr);
+	rom_addr |= PCI_ROM_ADDRESS_ENABLE;
+	pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_addr);
+}
+
+/**
+ * pci_disable_rom - disable ROM decoding for a PCI device
+ * @dev: PCI device to disable
+ *
+ * Disable ROM decoding on a PCI device by turning off the last bit in the
+ * ROM BAR.
+ */
+static void
+pci_disable_rom(struct pci_dev *dev)
+{
+	u32 rom_addr;
+
+	pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_addr);
+	rom_addr &= ~PCI_ROM_ADDRESS_ENABLE;
+	pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_addr);
+}
+
+/**
+ * pci_read_rom - read a PCI ROM
+ * @kobj: kernel object handle
+ * @buf: where to put the data we read from the ROM
+ * @off: file offset
+ * @count: number of bytes to read
+ *
+ * Put @count bytes starting at @off into @buf from the ROM in the PCI
+ * device corresponding to @kobj.
+ */
+static ssize_t
+pci_read_rom(struct kobject *kobj, char *buf, loff_t off, size_t count)
+{
+	struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
+	loff_t init_off = off;
+	unsigned long start = pci_resource_start(dev, PCI_ROM_RESOURCE);
+	int size = pci_resource_len(dev, PCI_ROM_RESOURCE);
+	char direct_access = dev->rom_info.rom ? 0 : 1;
+
+	if (off > size)
+		return 0;
+	if (off + count > size) {
+		size -= off;
+		count = size;
+	} else {
+		size = count;
+	}
+
+	/* Enable ROM space decodes and do the reads */
+	if (direct_access)
+		pci_enable_rom(dev);
+
+	while (size > 0) {
+		unsigned char val;
+		if (direct_access)
+			val = readb(start + off);
+		else
+			val = *(dev->rom_info.rom + off);
+		buf[off - init_off] = val;
+		off++;
+		--size;
+	}
+
+	/* Disable again before continuing */
+	if (direct_access)
+		pci_disable_rom(dev);
+
+	return count;
+}
+
 static struct bin_attribute pci_config_attr = {
 	.attr =	{
 		.name = "config",
@@ -186,13 +272,50 @@
 	.write = pci_write_config,
 };
 
-void pci_create_sysfs_dev_files (struct pci_dev *pdev)
+void pci_create_sysfs_dev_files(struct pci_dev *pdev)
 {
 	if (pdev->cfg_size < 4096)
 		sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
 	else
 		sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
 
+	/* If the device has a ROM, try to expose it in sysfs. */
+	if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) {
+		struct bin_attribute *rom_attr;
+		rom_attr = kmalloc(sizeof(*rom_attr), GFP_ATOMIC);
+
+		pdev->rom_info.rom_attr = NULL;
+		if (!rom_attr)
+			goto out;
+
+		pdev->rom_info.rom_attr = rom_attr;
+		rom_attr->attr.name = "rom";
+		rom_attr->attr.mode = S_IRUSR;
+		rom_attr->attr.owner = THIS_MODULE;
+		rom_attr->read = pci_read_rom;
+		rom_attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
+		sysfs_create_bin_file(&pdev->dev.kobj, rom_attr);
+	}
+ out:
 	/* add platform-specific attributes */
 	pcibios_add_platform_entries(pdev);
+}
+
+/**
+ * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
+ * @pdev: device whose entries we should free
+ *
+ * Cleanup when @pdev is removed from sysfs.
+ */
+void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
+{
+	if (pdev->cfg_size < 4096)
+		sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
+	else
+		sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
+
+	if (pdev->rom_info.rom_attr) {
+		sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_info.rom_attr);
+		kfree(pdev->rom_info.rom_attr);
+	}
 }
===== drivers/pci/pci.h 1.12 vs edited =====
--- 1.12/drivers/pci/pci.h	2004-06-04 06:23:04 -07:00
+++ edited/drivers/pci/pci.h	2004-08-02 09:41:02 -07:00
@@ -3,6 +3,7 @@
 extern int pci_hotplug (struct device *dev, char **envp, int num_envp,
 			 char *buffer, int buffer_size);
 extern void pci_create_sysfs_dev_files(struct pci_dev *pdev);
+extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
 extern int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
 				  unsigned long size, unsigned long align,
 				  unsigned long min, unsigned int type_mask,
===== drivers/pci/probe.c 1.65 vs edited =====
--- 1.65/drivers/pci/probe.c	2004-05-21 11:45:27 -07:00
+++ edited/drivers/pci/probe.c	2004-08-02 09:43:21 -07:00
@@ -157,6 +157,8 @@
 #endif
 		}
 	}
+
+	dev->rom_info.rom = NULL;
 	if (rom) {
 		dev->rom_base_reg = rom;
 		res = &dev->resource[PCI_ROM_RESOURCE];
===== drivers/pci/remove.c 1.3 vs edited =====
--- 1.3/drivers/pci/remove.c	2004-02-03 09:17:30 -08:00
+++ edited/drivers/pci/remove.c	2004-08-02 09:41:52 -07:00
@@ -26,6 +26,9 @@
 static void pci_destroy_dev(struct pci_dev *dev)
 {
 	pci_proc_detach_device(dev);
+	/* Free the copy of the ROM if we made one */
+	kfree(dev->rom_info.rom);
+	pci_remove_sysfs_dev_files(dev);
 	device_unregister(&dev->dev);
 
 	/* Remove the device from the device lists, and prevent any further
===== include/linux/pci.h 1.130 vs edited =====
--- 1.130/include/linux/pci.h	2004-06-30 11:21:27 -07:00
+++ edited/include/linux/pci.h	2004-08-02 09:32:08 -07:00
@@ -471,6 +471,11 @@
 	pci_mmap_mem
 };
 
+struct rom_info {
+	char *rom; /* copy of the ROM if necessary */
+	struct bin_attribute *rom_attr;
+};
+
 /* This defines the direction arg to the DMA mapping routines. */
 #define PCI_DMA_BIDIRECTIONAL	0
 #define PCI_DMA_TODEVICE	1
@@ -537,6 +542,7 @@
 	unsigned int	is_busmaster:1; /* device is busmaster */
 	
 	unsigned int 	saved_config_space[16]; /* config space saved at suspend time */
+	struct rom_info rom_info; /* How and where to get the ROM info for this device */
 #ifdef CONFIG_PCI_NAMES
 #define PCI_NAME_SIZE	96
 #define PCI_NAME_HALF	__stringify(43)	/* less than half to handle slop */