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DM9000: Add platform flag for no attached EEPROM 

Allow the platform data to specify to the DM9000 driver
that there is no posibility of an attached EEPROM on the
device, so default all reads to 0xff and ignore any
write operations.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Ben Dooks 2008-02-05 00:02:20 +00:00 committed by Jeff Garzik
parent 073d3f46e5
commit bb44fb70e0
2 changed files with 16 additions and 0 deletions
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15
drivers/net/dm9000.c
View File

@ -405,6 +405,9 @@ static int dm9000_get_eeprom(struct net_device *dev,
if ((len & 1) != 0 || (offset & 1) != 0)
return -EINVAL;
if (dm->flags & DM9000_PLATF_NO_EEPROM)
return -ENOENT;
ee->magic = DM_EEPROM_MAGIC;
for (i = 0; i < len; i += 2)
@ -426,6 +429,9 @@ static int dm9000_set_eeprom(struct net_device *dev,
if ((len & 1) != 0 || (offset & 1) != 0)
return -EINVAL;
if (dm->flags & DM9000_PLATF_NO_EEPROM)
return -ENOENT;
if (ee->magic != DM_EEPROM_MAGIC)
return -EINVAL;
@ -1100,6 +1106,12 @@ dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
{
unsigned long flags;
if (db->flags & DM9000_PLATF_NO_EEPROM) {
to[0] = 0xff;
to[1] = 0xff;
return;
}
mutex_lock(&db->addr_lock);
spin_lock_irqsave(&db->lock, flags);
@ -1134,6 +1146,9 @@ dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
{
unsigned long flags;
if (db->flags & DM9000_PLATF_NO_EEPROM)
return;
mutex_lock(&db->addr_lock);
spin_lock_irqsave(&db->lock, flags);

1
include/linux/dm9000.h
View File

@ -20,6 +20,7 @@
#define DM9000_PLATF_16BITONLY (0x0002)
#define DM9000_PLATF_32BITONLY (0x0004)
#define DM9000_PLATF_EXT_PHY (0x0008)
#define DM9000_PLATF_NO_EEPROM (0x0010)
/* platfrom data for platfrom device structure's platfrom_data field */