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ax88796: add 93cx6 eeprom support

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Hook up the 93cx6 eeprom code to the ax88796 driver and modify the ax88796
driver to read out the mac address from the eeprom.  We need this for the
ax88796 on certain SuperH boards.  The pin configuration used to connect
the eeprom to the ax88796 on these boards is the same as pointed out by the
ax88796 datasheet, so we can probably reuse this code for multiple
platforms in the future.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Magnus Damm 2007-09-28 22:42:16 -07:00 committed by David S. Miller
parent 6daf653103
commit 89e536a190
4 changed files with 59 additions and 1 deletions
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7
drivers/net/Kconfig
View file

@ -240,6 +240,13 @@ config AX88796
AX88796 driver, using platform bus to provide
chip detection and resources
config AX88796_93CX6
bool "ASIX AX88796 external 93CX6 eeprom support"
depends on AX88796
select EEPROM_93CX6
help
Select this if your platform comes with an external 93CX6 eeprom.
config MACE
tristate "MACE (Power Mac ethernet) support"
depends on PPC_PMAC && PPC32

49
drivers/net/ax88796.c
View file

@ -24,6 +24,7 @@
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/eeprom_93cx6.h>
#include <net/ax88796.h>
@ -582,6 +583,37 @@ static const struct ethtool_ops ax_ethtool_ops = {
.get_link = ax_get_link,
};
#ifdef CONFIG_AX88796_93CX6
static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
struct ei_device *ei_local = eeprom->data;
u8 reg = ei_inb(ei_local->mem + AX_MEMR);
eeprom->reg_data_in = reg & AX_MEMR_EEI;
eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
eeprom->reg_chip_select = reg & AX_MEMR_EECS;
}
static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
struct ei_device *ei_local = eeprom->data;
u8 reg = ei_inb(ei_local->mem + AX_MEMR);
reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);
if (eeprom->reg_data_in)
reg |= AX_MEMR_EEI;
if (eeprom->reg_data_clock)
reg |= AX_MEMR_EECLK;
if (eeprom->reg_chip_select)
reg |= AX_MEMR_EECS;
ei_outb(reg, ei_local->mem + AX_MEMR);
udelay(10);
}
#endif
/* setup code */
static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
@ -640,6 +672,23 @@ static int ax_init_dev(struct net_device *dev, int first_init)
memcpy(dev->dev_addr, SA_prom, 6);
}
#ifdef CONFIG_AX88796_93CX6
if (first_init && ax->plat->flags & AXFLG_HAS_93CX6) {
unsigned char mac_addr[6];
struct eeprom_93cx6 eeprom;
eeprom.data = ei_local;
eeprom.register_read = ax_eeprom_register_read;
eeprom.register_write = ax_eeprom_register_write;
eeprom.width = PCI_EEPROM_WIDTH_93C56;
eeprom_93cx6_multiread(&eeprom, 0,
(__le16 __force *)mac_addr,
sizeof(mac_addr) >> 1);
memcpy(dev->dev_addr, mac_addr, 6);
}
#endif
if (ax->plat->wordlength == 2) {
/* We must set the 8390 for word mode. */
ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);

3
include/linux/eeprom_93cx6.h
View file

@ -21,13 +21,14 @@
/*
Module: eeprom_93cx6
Abstract: EEPROM reader datastructures for 93cx6 chipsets.
Supported chipsets: 93c46 & 93c66.
Supported chipsets: 93c46, 93c56 and 93c66.
*/
/*
* EEPROM operation defines.
*/
#define PCI_EEPROM_WIDTH_93C46 6
#define PCI_EEPROM_WIDTH_93C56 8
#define PCI_EEPROM_WIDTH_93C66 8
#define PCI_EEPROM_WIDTH_OPCODE 3
#define PCI_EEPROM_WRITE_OPCODE 0x05

1
include/net/ax88796.h
View file

@ -14,6 +14,7 @@
#define AXFLG_HAS_EEPROM (1<<0)
#define AXFLG_MAC_FROMDEV (1<<1) /* device already has MAC */
#define AXFLG_HAS_93CX6 (1<<2) /* use eeprom_93cx6 driver */
struct ax_plat_data {
unsigned int flags;