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authorLinus Torvalds <torvalds@g5.osdl.org>2005-09-11 09:26:20 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-11 09:26:20 -0700
commit4120b028dd231743935d954732045a87edda2a0a (patch)
treeb28e702ec5a3350d7772ee92233b4c169422a4f8 /drivers/net/sungem.c
parent9ec4ff421f032f24416217f23b0c82dc9a5f38f6 (diff)
downloadlwn-4120b028dd231743935d954732045a87edda2a0a.tar.gz
lwn-4120b028dd231743935d954732045a87edda2a0a.zip
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>
Diffstat (limited to 'drivers/net/sungem.c')
-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 3f67a42e8503..de399563a9db 100644
--- a/drivers/net/sungem.c
+++ b/drivers/net/sungem.c
@@ -2817,7 +2817,7 @@ 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;
@@ -2838,35 +2838,27 @@ 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;