diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/852-v5.10-0001-net-sfp-VSOL-V2801F-CarlitoxxPro-CPGOS03-0490-v2.0-w.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/852-v5.10-0001-net-sfp-VSOL-V2801F-CarlitoxxPro-CPGOS03-0490-v2.0-w.patch | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/852-v5.10-0001-net-sfp-VSOL-V2801F-CarlitoxxPro-CPGOS03-0490-v2.0-w.patch b/target/linux/generic/backport-5.4/852-v5.10-0001-net-sfp-VSOL-V2801F-CarlitoxxPro-CPGOS03-0490-v2.0-w.patch new file mode 100644 index 0000000000..1901054a10 --- /dev/null +++ b/target/linux/generic/backport-5.4/852-v5.10-0001-net-sfp-VSOL-V2801F-CarlitoxxPro-CPGOS03-0490-v2.0-w.patch @@ -0,0 +1,144 @@ +From 0d035bed2a4a6c4878518749348be61bf082d12a Mon Sep 17 00:00:00 2001 +From: Russell King <rmk+kernel@armlinux.org.uk> +Date: Wed, 9 Dec 2020 11:22:49 +0000 +Subject: [PATCH] net: sfp: VSOL V2801F / CarlitoxxPro CPGOS03-0490 v2.0 + workaround +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Add a workaround for the detection of VSOL V2801F / CarlitoxxPro +CPGOS03-0490 v2.0 GPON module which CarlitoxxPro states needs single +byte I2C reads to the EEPROM. + +Pali Rohár reports that he also has a CarlitoxxPro-based V2801F module, +which reports a manufacturer of "OEM". This manufacturer can't be +matched as it appears in many different modules, so also match the part +number too. + +Reported-by: Thomas Schreiber <tschreibe@gmail.com> +Reported-by: Pali Rohár <pali@kernel.org> +Tested-by: Pali Rohár <pali@kernel.org> +Reviewed-by: Andrew Lunn <andrew@lunn.ch> +Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/phy/sfp.c | 63 +++++++++++++++++++++++++++++++++++++++---- + 1 file changed, 58 insertions(+), 5 deletions(-) + +--- a/drivers/net/phy/sfp.c ++++ b/drivers/net/phy/sfp.c +@@ -191,6 +191,7 @@ struct sfp { + struct sfp_bus *sfp_bus; + struct phy_device *mod_phy; + const struct sff_data *type; ++ size_t i2c_block_size; + u32 max_power_mW; + + unsigned int (*get_state)(struct sfp *); +@@ -305,10 +306,19 @@ static int sfp_i2c_read(struct sfp *sfp, + size_t len) + { + struct i2c_msg msgs[2]; +- u8 bus_addr = a2 ? 0x51 : 0x50; ++ size_t block_size; + size_t this_len; ++ u8 bus_addr; + int ret; + ++ if (a2) { ++ block_size = 16; ++ bus_addr = 0x51; ++ } else { ++ block_size = sfp->i2c_block_size; ++ bus_addr = 0x50; ++ } ++ + msgs[0].addr = bus_addr; + msgs[0].flags = 0; + msgs[0].len = 1; +@@ -320,8 +330,8 @@ static int sfp_i2c_read(struct sfp *sfp, + + while (len) { + this_len = len; +- if (this_len > 16) +- this_len = 16; ++ if (this_len > block_size) ++ this_len = block_size; + + msgs[1].len = this_len; + +@@ -1569,6 +1579,28 @@ static int sfp_sm_mod_hpower(struct sfp + return 0; + } + ++/* Some modules (Nokia 3FE46541AA) lock up if byte 0x51 is read as a ++ * single read. Switch back to reading 16 byte blocks unless we have ++ * a CarlitoxxPro module (rebranded VSOL V2801F). Even more annoyingly, ++ * some VSOL V2801F have the vendor name changed to OEM. ++ */ ++static int sfp_quirk_i2c_block_size(const struct sfp_eeprom_base *base) ++{ ++ if (!memcmp(base->vendor_name, "VSOL ", 16)) ++ return 1; ++ if (!memcmp(base->vendor_name, "OEM ", 16) && ++ !memcmp(base->vendor_pn, "V2801F ", 16)) ++ return 1; ++ ++ /* Some modules can't cope with long reads */ ++ return 16; ++} ++ ++static void sfp_quirks_base(struct sfp *sfp, const struct sfp_eeprom_base *base) ++{ ++ sfp->i2c_block_size = sfp_quirk_i2c_block_size(base); ++} ++ + static int sfp_sm_mod_probe(struct sfp *sfp, bool report) + { + /* SFP module inserted - read I2C data */ +@@ -1577,14 +1609,20 @@ static int sfp_sm_mod_probe(struct sfp * + u8 check; + int ret; + +- ret = sfp_read(sfp, false, 0, &id, sizeof(id)); ++ /* Some modules (CarlitoxxPro CPGOS03-0490) do not support multibyte ++ * reads from the EEPROM, so start by reading the base identifying ++ * information one byte at a time. ++ */ ++ sfp->i2c_block_size = 1; ++ ++ ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base)); + if (ret < 0) { + if (report) + dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); + return -EAGAIN; + } + +- if (ret != sizeof(id)) { ++ if (ret != sizeof(id.base)) { + dev_err(sfp->dev, "EEPROM short read: %d\n", ret); + return -EAGAIN; + } +@@ -1612,6 +1650,21 @@ static int sfp_sm_mod_probe(struct sfp * + } + } + ++ /* Apply any early module-specific quirks */ ++ sfp_quirks_base(sfp, &id.base); ++ ++ ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext)); ++ if (ret < 0) { ++ if (report) ++ dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); ++ return -EAGAIN; ++ } ++ ++ if (ret != sizeof(id.ext)) { ++ dev_err(sfp->dev, "EEPROM short read: %d\n", ret); ++ return -EAGAIN; ++ } ++ + check = sfp_check(&id.ext, sizeof(id.ext) - 1); + if (check != id.ext.cc_ext) { + if (cotsworks) { |