diff options
| -rw-r--r-- | drivers/net/phy/sfp.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index eef458ab0e5b..c24b0e83dd32 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -1632,10 +1632,43 @@ static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) return 0; } +static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id) +{ + u8 check; + int err; + + if (id->base.phys_id != SFF8024_ID_SFF_8472 || + id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP || + id->base.connector != SFF8024_CONNECTOR_LC) { + dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n"); + id->base.phys_id = SFF8024_ID_SFF_8472; + id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP; + id->base.connector = SFF8024_CONNECTOR_LC; + err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3); + if (err != 3) { + dev_err(sfp->dev, "Failed to rewrite module EEPROM: %d\n", err); + return err; + } + + /* Cotsworks modules have been found to require a delay between write operations. */ + mdelay(50); + + /* Update base structure checksum */ + check = sfp_check(&id->base, sizeof(id->base) - 1); + err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1); + if (err != 1) { + dev_err(sfp->dev, "Failed to update base structure checksum in fiber module EEPROM: %d\n", err); + return err; + } + } + return 0; +} + static int sfp_sm_mod_probe(struct sfp *sfp, bool report) { /* SFP module inserted - read I2C data */ struct sfp_eeprom_id id; + bool cotsworks_sfbg; bool cotsworks; u8 check; int ret; @@ -1657,6 +1690,17 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) * serial number and date code. */ cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); + cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4); + + /* Cotsworks SFF module EEPROM do not always have valid phys_id, + * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if + * Cotsworks PN matches and bytes are not correct. + */ + if (cotsworks && cotsworks_sfbg) { + ret = sfp_cotsworks_fixup_check(sfp, &id); + if (ret < 0) + return ret; + } /* Validate the checksum over the base structure */ check = sfp_check(&id.base, sizeof(id.base) - 1); |