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authorLinus Torvalds <torvalds@g5.osdl.org>2005-09-11 14:08:59 -0700
committerChris Wright <chrisw@osdl.org>2005-09-16 18:01:57 -0700
commit0098d9c5f87aaff2efdcb43e30642dad7ce55b19 (patch)
tree2131e3054c9ae155d6939243992c518f6fb18b99
parentedf3b5b336f55b8a97142592bf5c1b7944deb9d1 (diff)
[PATCH] Sun GEM ethernet: enable and map PCI ROM properly
This same patch was reported to fix the MAC address detection on sunhme (next patch). Most people seem to be running this on Sparcs or PPC machines, where we get the MAC address from their respective firmware rather than from the (previously broken) ROM mapping routines. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Chris Wright <chrisw@osdl.org>
-rw-r--r--drivers/net/sungem.c36
1 files changed, 14 insertions, 22 deletions
diff --git a/drivers/net/sungem.c b/drivers/net/sungem.c
index 2608e7a3d214..ddfdad4f070d 100644
--- a/drivers/net/sungem.c
+++ b/drivers/net/sungem.c
@@ -2816,7 +2816,7 @@ static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
#if (!defined(__sparc__) && !defined(CONFIG_PPC_PMAC))
/* Fetch MAC address from vital product data of PCI ROM. */
-static void find_eth_addr_in_vpd(void __iomem *rom_base, int len, unsigned char *dev_addr)
+static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, unsigned char *dev_addr)
{
int this_offset;
@@ -2837,35 +2837,27 @@ static void find_eth_addr_in_vpd(void __iomem *rom_base, int len, unsigned char
for (i = 0; i < 6; i++)
dev_addr[i] = readb(p + i);
- break;
+ return 1;
}
+ return 0;
}
static void get_gem_mac_nonobp(struct pci_dev *pdev, unsigned char *dev_addr)
{
- u32 rom_reg_orig;
- void __iomem *p;
-
- if (pdev->resource[PCI_ROM_RESOURCE].parent == NULL) {
- if (pci_assign_resource(pdev, PCI_ROM_RESOURCE) < 0)
- goto use_random;
- }
+ size_t size;
+ void __iomem *p = pci_map_rom(pdev, &size);
- pci_read_config_dword(pdev, pdev->rom_base_reg, &rom_reg_orig);
- pci_write_config_dword(pdev, pdev->rom_base_reg,
- rom_reg_orig | PCI_ROM_ADDRESS_ENABLE);
+ if (p) {
+ int found;
- p = ioremap(pci_resource_start(pdev, PCI_ROM_RESOURCE), (64 * 1024));
- if (p != NULL && readb(p) == 0x55 && readb(p + 1) == 0xaa)
- find_eth_addr_in_vpd(p, (64 * 1024), dev_addr);
-
- if (p != NULL)
- iounmap(p);
-
- pci_write_config_dword(pdev, pdev->rom_base_reg, rom_reg_orig);
- return;
+ found = readb(p) == 0x55 &&
+ readb(p + 1) == 0xaa &&
+ find_eth_addr_in_vpd(p, (64 * 1024), dev_addr);
+ pci_unmap_rom(pdev, p);
+ if (found)
+ return;
+ }
-use_random:
/* Sun MAC prefix then 3 random bytes. */
dev_addr[0] = 0x08;
dev_addr[1] = 0x00;