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path: root/drivers/net/sfc/mdio_10g.c
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Diffstat (limited to 'drivers/net/sfc/mdio_10g.c')
-rw-r--r--drivers/net/sfc/mdio_10g.c28
1 files changed, 22 insertions, 6 deletions
diff --git a/drivers/net/sfc/mdio_10g.c b/drivers/net/sfc/mdio_10g.c
index f9e2f95c3b4..9f5ec3eb341 100644
--- a/drivers/net/sfc/mdio_10g.c
+++ b/drivers/net/sfc/mdio_10g.c
@@ -17,6 +17,21 @@
#include "boards.h"
#include "workarounds.h"
+unsigned mdio_id_oui(u32 id)
+{
+ unsigned oui = 0;
+ int i;
+
+ /* The bits of the OUI are designated a..x, with a=0 and b variable.
+ * In the id register c is the MSB but the OUI is conventionally
+ * written as bytes h..a, p..i, x..q. Reorder the bits accordingly. */
+ for (i = 0; i < 22; ++i)
+ if (id & (1 << (i + 10)))
+ oui |= 1 << (i ^ 7);
+
+ return oui;
+}
+
int mdio_clause45_reset_mmd(struct efx_nic *port, int mmd,
int spins, int spintime)
{
@@ -125,24 +140,25 @@ int mdio_clause45_wait_reset_mmds(struct efx_nic *efx,
int mdio_clause45_check_mmds(struct efx_nic *efx,
unsigned int mmd_mask, unsigned int fatal_mask)
{
+ int mmd = 0, probe_mmd, devs0, devs1;
u32 devices;
- int mmd = 0, probe_mmd;
/* Historically we have probed the PHYXS to find out what devices are
* present,but that doesn't work so well if the PHYXS isn't expected
* to exist, if so just find the first item in the list supplied. */
probe_mmd = (mmd_mask & MDIO_MMDREG_DEVS_PHYXS) ? MDIO_MMD_PHYXS :
__ffs(mmd_mask);
- devices = (mdio_clause45_read(efx, efx->mii.phy_id,
- probe_mmd, MDIO_MMDREG_DEVS0) |
- mdio_clause45_read(efx, efx->mii.phy_id,
- probe_mmd, MDIO_MMDREG_DEVS1) << 16);
/* Check all the expected MMDs are present */
- if (devices < 0) {
+ devs0 = mdio_clause45_read(efx, efx->mii.phy_id,
+ probe_mmd, MDIO_MMDREG_DEVS0);
+ devs1 = mdio_clause45_read(efx, efx->mii.phy_id,
+ probe_mmd, MDIO_MMDREG_DEVS1);
+ if (devs0 < 0 || devs1 < 0) {
EFX_ERR(efx, "failed to read devices present\n");
return -EIO;
}
+ devices = devs0 | (devs1 << 16);
if ((devices & mmd_mask) != mmd_mask) {
EFX_ERR(efx, "required MMDs not present: got %x, "
"wanted %x\n", devices, mmd_mask);