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b44: use fixed PHY device if we do not find any 

The ADM6996L switch and some Broadcom switches with two MII interfaces
like the BCM5325F connected to two MACs on the SoC, used on some
routers do not return a valid value when reading the PHY id register
and Linux thinks there is no PHY at all, but that is wrong.
This patch registers a fixed phy in the arch code and then searches it
when there is no other phy in the Ethernet driver code.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Hauke Mehrtens 2013-12-20 02:16:13 +01:00 committed by David S. Miller
parent 656a7c2b12
commit b04138b335
3 changed files with 28 additions and 1 deletions
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10
arch/mips/bcm47xx/setup.c
View File

@ -28,6 +28,9 @@
#include <linux/export.h>
#include <linux/types.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma_soc.h>
@ -225,6 +228,12 @@ void __init plat_mem_setup(void)
bcm47xx_board_detect();
}
static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
.link = 1,
.speed = SPEED_100,
.duplex = DUPLEX_FULL,
};
static int __init bcm47xx_register_bus_complete(void)
{
switch (bcm47xx_bus_type) {
@ -239,6 +248,7 @@ static int __init bcm47xx_register_bus_complete(void)
break;
#endif
}
fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
return 0;
}
device_initcall(bcm47xx_register_bus_complete);

16
drivers/net/ethernet/broadcom/b44.c
View File

@ -2233,6 +2233,7 @@ static int b44_register_phy_one(struct b44 *bp)
struct ssb_device *sdev = bp->sdev;
struct phy_device *phydev;
char bus_id[MII_BUS_ID_SIZE + 3];
struct ssb_sprom *sprom = &sdev->bus->sprom;
int err;
mii_bus = mdiobus_alloc();
@ -2266,7 +2267,20 @@ static int b44_register_phy_one(struct b44 *bp)
goto err_out_mdiobus_irq;
}
snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, mii_bus->id, bp->phy_addr);
if (!bp->mii_bus->phy_map[bp->phy_addr] &&
(sprom->boardflags_lo & (B44_BOARDFLAG_ROBO | B44_BOARDFLAG_ADM))) {
dev_info(sdev->dev,
"could not find PHY at %i, use fixed one\n",
bp->phy_addr);
bp->phy_addr = 0;
snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, "fixed-0",
bp->phy_addr);
} else {
snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, mii_bus->id,
bp->phy_addr);
}
phydev = phy_connect(bp->dev, bus_id, &b44_adjust_link,
PHY_INTERFACE_MODE_MII);

3
drivers/net/ethernet/broadcom/b44.h
View File

@ -345,6 +345,9 @@ B44_STAT_REG_DECLARE
struct u64_stats_sync syncp;
};
#define B44_BOARDFLAG_ROBO 0x0010 /* Board has robo switch */
#define B44_BOARDFLAG_ADM 0x0080 /* Board has ADMtek switch */
struct ssb_device;
struct b44 {