[PATCH] natsemi: Support oversized EEPROMs
The natsemi chip can have a larger EEPROM attached than it itself uses for
configuration. This patch adds support for user space access to such an
EEPROM.
Signed-off-by: Mark Brown <broonie@sirena.org.uk>
Cc: Tim Hockin <thockin@hockin.org>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c
index 8d49998..7826afb 100644
--- a/drivers/net/natsemi.c
+++ b/drivers/net/natsemi.c
@@ -226,7 +226,7 @@
NATSEMI_PG1_NREGS)
#define NATSEMI_REGS_VER 1 /* v1 added RFDR registers */
#define NATSEMI_REGS_SIZE (NATSEMI_NREGS * sizeof(u32))
-#define NATSEMI_EEPROM_SIZE 24 /* 12 16-bit values */
+#define NATSEMI_DEF_EEPROM_SIZE 24 /* 12 16-bit values */
/* Buffer sizes:
* The nic writes 32-bit values, even if the upper bytes of
@@ -714,6 +714,8 @@
unsigned int iosize;
spinlock_t lock;
u32 msg_enable;
+ /* EEPROM data */
+ int eeprom_size;
};
static void move_int_phy(struct net_device *dev, int addr);
@@ -890,6 +892,7 @@
np->msg_enable = (debug >= 0) ? (1<<debug)-1 : NATSEMI_DEF_MSG;
np->hands_off = 0;
np->intr_status = 0;
+ np->eeprom_size = NATSEMI_DEF_EEPROM_SIZE;
/* Initial port:
* - If the nic was configured to use an external phy and if find_mii
@@ -2582,7 +2585,8 @@
static int get_eeprom_len(struct net_device *dev)
{
- return NATSEMI_EEPROM_SIZE;
+ struct netdev_private *np = netdev_priv(dev);
+ return np->eeprom_size;
}
static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
@@ -2669,15 +2673,20 @@
static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data)
{
struct netdev_private *np = netdev_priv(dev);
- u8 eebuf[NATSEMI_EEPROM_SIZE];
+ u8 *eebuf;
int res;
+ eebuf = kmalloc(np->eeprom_size, GFP_KERNEL);
+ if (!eebuf)
+ return -ENOMEM;
+
eeprom->magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16);
spin_lock_irq(&np->lock);
res = netdev_get_eeprom(dev, eebuf);
spin_unlock_irq(&np->lock);
if (!res)
memcpy(data, eebuf+eeprom->offset, eeprom->len);
+ kfree(eebuf);
return res;
}
@@ -3033,9 +3042,10 @@
int i;
u16 *ebuf = (u16 *)buf;
void __iomem * ioaddr = ns_ioaddr(dev);
+ struct netdev_private *np = netdev_priv(dev);
/* eeprom_read reads 16 bits, and indexes by 16 bits */
- for (i = 0; i < NATSEMI_EEPROM_SIZE/2; i++) {
+ for (i = 0; i < np->eeprom_size/2; i++) {
ebuf[i] = eeprom_read(ioaddr, i);
/* The EEPROM itself stores data bit-swapped, but eeprom_read
* reads it back "sanely". So we swap it back here in order to