diff options
| -rw-r--r-- | drivers/net/phy/sfp.c | 212 | ||||
| -rw-r--r-- | include/linux/sfp.h | 8 |
2 files changed, 196 insertions, 24 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 34bf724c00c7..4799976a1609 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -24,14 +24,18 @@ enum { GPIO_LOS, GPIO_TX_FAULT, GPIO_TX_DISABLE, - GPIO_RATE_SELECT, + GPIO_RS0, + GPIO_RS1, GPIO_MAX, SFP_F_PRESENT = BIT(GPIO_MODDEF0), SFP_F_LOS = BIT(GPIO_LOS), SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), - SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), + SFP_F_RS0 = BIT(GPIO_RS0), + SFP_F_RS1 = BIT(GPIO_RS1), + + SFP_F_OUTPUTS = SFP_F_TX_DISABLE | SFP_F_RS0 | SFP_F_RS1, SFP_E_INSERT = 0, SFP_E_REMOVE, @@ -148,6 +152,7 @@ static const char *gpio_names[] = { "tx-fault", "tx-disable", "rate-select0", + "rate-select1", }; static const enum gpiod_flags gpio_flags[] = { @@ -156,6 +161,7 @@ static const enum gpiod_flags gpio_flags[] = { GPIOD_IN, GPIOD_ASIS, GPIOD_ASIS, + GPIOD_ASIS, }; /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a @@ -249,6 +255,7 @@ struct sfp { * state: st_mutex held unless reading input bits */ struct mutex st_mutex; /* Protects state */ + unsigned int state_hw_drive; unsigned int state_hw_mask; unsigned int state_soft_mask; unsigned int state; @@ -269,6 +276,10 @@ struct sfp { unsigned int module_t_start_up; unsigned int module_t_wait; + unsigned int rate_kbd; + unsigned int rs_threshold_kbd; + unsigned int rs_state_mask; + bool have_a2; bool tx_fault_ignore; @@ -319,7 +330,7 @@ static bool sfp_module_supported(const struct sfp_eeprom_id *id) static const struct sff_data sfp_data = { .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | - SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, + SFP_F_TX_DISABLE | SFP_F_RS0 | SFP_F_RS1, .module_supported = sfp_module_supported, }; @@ -507,20 +518,37 @@ static unsigned int sff_gpio_get_state(struct sfp *sfp) static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) { - if (state & SFP_F_PRESENT) { - /* If the module is present, drive the signals */ - if (sfp->gpio[GPIO_TX_DISABLE]) + unsigned int drive; + + if (state & SFP_F_PRESENT) + /* If the module is present, drive the requested signals */ + drive = sfp->state_hw_drive; + else + /* Otherwise, let them float to the pull-ups */ + drive = 0; + + if (sfp->gpio[GPIO_TX_DISABLE]) { + if (drive & SFP_F_TX_DISABLE) gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], state & SFP_F_TX_DISABLE); - if (state & SFP_F_RATE_SELECT) - gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], - state & SFP_F_RATE_SELECT); - } else { - /* Otherwise, let them float to the pull-ups */ - if (sfp->gpio[GPIO_TX_DISABLE]) + else gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); - if (state & SFP_F_RATE_SELECT) - gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); + } + + if (sfp->gpio[GPIO_RS0]) { + if (drive & SFP_F_RS0) + gpiod_direction_output(sfp->gpio[GPIO_RS0], + state & SFP_F_RS0); + else + gpiod_direction_input(sfp->gpio[GPIO_RS0]); + } + + if (sfp->gpio[GPIO_RS1]) { + if (drive & SFP_F_RS1) + gpiod_direction_output(sfp->gpio[GPIO_RS1], + state & SFP_F_RS1); + else + gpiod_direction_input(sfp->gpio[GPIO_RS1]); } } @@ -682,16 +710,33 @@ static unsigned int sfp_soft_get_state(struct sfp *sfp) return state & sfp->state_soft_mask; } -static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) +static void sfp_soft_set_state(struct sfp *sfp, unsigned int state, + unsigned int soft) { - u8 mask = SFP_STATUS_TX_DISABLE_FORCE; + u8 mask = 0; u8 val = 0; + if (soft & SFP_F_TX_DISABLE) + mask |= SFP_STATUS_TX_DISABLE_FORCE; if (state & SFP_F_TX_DISABLE) val |= SFP_STATUS_TX_DISABLE_FORCE; + if (soft & SFP_F_RS0) + mask |= SFP_STATUS_RS0_SELECT; + if (state & SFP_F_RS0) + val |= SFP_STATUS_RS0_SELECT; + + if (mask) + sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); - sfp_modify_u8(sfp, true, SFP_STATUS, mask, val); + val = mask = 0; + if (soft & SFP_F_RS1) + mask |= SFP_EXT_STATUS_RS1_SELECT; + if (state & SFP_F_RS1) + val |= SFP_EXT_STATUS_RS1_SELECT; + + if (mask) + sfp_modify_u8(sfp, true, SFP_EXT_STATUS, mask, val); } static void sfp_soft_start_poll(struct sfp *sfp) @@ -705,6 +750,8 @@ static void sfp_soft_start_poll(struct sfp *sfp) mask |= SFP_F_TX_FAULT; if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) mask |= SFP_F_LOS; + if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RATE_SELECT) + mask |= sfp->rs_state_mask; mutex_lock(&sfp->st_mutex); // Poll the soft state for hardware pins we want to ignore @@ -743,11 +790,13 @@ static unsigned int sfp_get_state(struct sfp *sfp) */ static void sfp_set_state(struct sfp *sfp, unsigned int state) { + unsigned int soft; + sfp->set_state(sfp, state); - if (state & SFP_F_PRESENT && - sfp->state_soft_mask & SFP_F_TX_DISABLE) - sfp_soft_set_state(sfp, state); + soft = sfp->state_soft_mask & SFP_F_OUTPUTS; + if (state & SFP_F_PRESENT && soft) + sfp_soft_set_state(sfp, state, soft); } static void sfp_mod_state(struct sfp *sfp, unsigned int mask, unsigned int set) @@ -1589,10 +1638,15 @@ static int sfp_debug_state_show(struct seq_file *s, void *data) sfp->sm_fault_retries); seq_printf(s, "PHY probe remaining retries: %d\n", sfp->sm_phy_retries); + seq_printf(s, "Signalling rate: %u kBd\n", sfp->rate_kbd); + seq_printf(s, "Rate select threshold: %u kBd\n", + sfp->rs_threshold_kbd); seq_printf(s, "moddef0: %d\n", !!(sfp->state & SFP_F_PRESENT)); seq_printf(s, "rx_los: %d\n", !!(sfp->state & SFP_F_LOS)); seq_printf(s, "tx_fault: %d\n", !!(sfp->state & SFP_F_TX_FAULT)); seq_printf(s, "tx_disable: %d\n", !!(sfp->state & SFP_F_TX_DISABLE)); + seq_printf(s, "rs0: %d\n", !!(sfp->state & SFP_F_RS0)); + seq_printf(s, "rs1: %d\n", !!(sfp->state & SFP_F_RS1)); return 0; } DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); @@ -1898,6 +1952,95 @@ static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) return 0; } +static void sfp_module_parse_rate_select(struct sfp *sfp) +{ + u8 rate_id; + + sfp->rs_threshold_kbd = 0; + sfp->rs_state_mask = 0; + + if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_RATE_SELECT))) + /* No support for RateSelect */ + return; + + /* Default to INF-8074 RateSelect operation. The signalling threshold + * rate is not well specified, so always select "Full Bandwidth", but + * SFF-8079 reveals that it is understood that RS0 will be low for + * 1.0625Gb/s and high for 2.125Gb/s. Choose a value half-way between. + * This method exists prior to SFF-8472. + */ + sfp->rs_state_mask = SFP_F_RS0; + sfp->rs_threshold_kbd = 1594; + + /* Parse the rate identifier, which is complicated due to history: + * SFF-8472 rev 9.5 marks this field as reserved. + * SFF-8079 references SFF-8472 rev 9.5 and defines bit 0. SFF-8472 + * compliance is not required. + * SFF-8472 rev 10.2 defines this field using values 0..4 + * SFF-8472 rev 11.0 redefines this field with bit 0 for SFF-8079 + * and even values. + */ + rate_id = sfp->id.base.rate_id; + if (rate_id == 0) + /* Unspecified */ + return; + + /* SFF-8472 rev 10.0..10.4 did not account for SFF-8079 using bit 0, + * and allocated value 3 to SFF-8431 independent tx/rx rate select. + * Convert this to a SFF-8472 rev 11.0 rate identifier. + */ + if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 && + sfp->id.ext.sff8472_compliance < SFP_SFF8472_COMPLIANCE_REV11_0 && + rate_id == 3) + rate_id = SFF_RID_8431; + + if (rate_id & SFF_RID_8079) { + /* SFF-8079 RateSelect / Application Select in conjunction with + * SFF-8472 rev 9.5. SFF-8079 defines rate_id as a bitfield + * with only bit 0 used, which takes precedence over SFF-8472. + */ + if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_APP_SELECT_SFF8079)) { + /* SFF-8079 Part 1 - rate selection between Fibre + * Channel 1.0625/2.125/4.25 Gbd modes. Note that RS0 + * is high for 2125, so we have to subtract 1 to + * include it. + */ + sfp->rs_threshold_kbd = 2125 - 1; + sfp->rs_state_mask = SFP_F_RS0; + } + return; + } + + /* SFF-8472 rev 9.5 does not define the rate identifier */ + if (sfp->id.ext.sff8472_compliance <= SFP_SFF8472_COMPLIANCE_REV9_5) + return; + + /* SFF-8472 rev 11.0 defines rate_id as a numerical value which will + * always have bit 0 clear due to SFF-8079's bitfield usage of rate_id. + */ + switch (rate_id) { + case SFF_RID_8431_RX_ONLY: + sfp->rs_threshold_kbd = 4250; + sfp->rs_state_mask = SFP_F_RS0; + break; + + case SFF_RID_8431_TX_ONLY: + sfp->rs_threshold_kbd = 4250; + sfp->rs_state_mask = SFP_F_RS1; + break; + + case SFF_RID_8431: + sfp->rs_threshold_kbd = 4250; + sfp->rs_state_mask = SFP_F_RS0 | SFP_F_RS1; + break; + + case SFF_RID_10G8G: + sfp->rs_threshold_kbd = 9000; + sfp->rs_state_mask = SFP_F_RS0 | SFP_F_RS1; + break; + } +} + /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do * not support multibyte reads from the EEPROM. Each multi-byte read @@ -2117,6 +2260,8 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) if (ret < 0) return ret; + sfp_module_parse_rate_select(sfp); + mask = SFP_F_PRESENT; if (sfp->gpio[GPIO_TX_DISABLE]) mask |= SFP_F_TX_DISABLE; @@ -2124,6 +2269,10 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) mask |= SFP_F_TX_FAULT; if (sfp->gpio[GPIO_LOS]) mask |= SFP_F_LOS; + if (sfp->gpio[GPIO_RS0]) + mask |= SFP_F_RS0; + if (sfp->gpio[GPIO_RS1]) + mask |= SFP_F_RS1; sfp->module_t_start_up = T_START_UP; sfp->module_t_wait = T_WAIT; @@ -2146,6 +2295,9 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) /* Initialise state bits to use from hardware */ sfp->state_hw_mask = mask; + /* We want to drive the rate select pins that the module is using */ + sfp->state_hw_drive |= sfp->rs_state_mask; + if (sfp->quirk && sfp->quirk->fixup) sfp->quirk->fixup(sfp); mutex_unlock(&sfp->st_mutex); @@ -2162,6 +2314,7 @@ static void sfp_sm_mod_remove(struct sfp *sfp) memset(&sfp->id, 0, sizeof(sfp->id)); sfp->module_power_mW = 0; + sfp->state_hw_drive = SFP_F_TX_DISABLE; sfp->have_a2 = false; dev_info(sfp->dev, "module removed\n"); @@ -2529,6 +2682,16 @@ static void sfp_stop(struct sfp *sfp) static void sfp_set_signal_rate(struct sfp *sfp, unsigned int rate_kbd) { + unsigned int set; + + sfp->rate_kbd = rate_kbd; + + if (rate_kbd > sfp->rs_threshold_kbd) + set = sfp->rs_state_mask; + else + set = 0; + + sfp_mod_state(sfp, SFP_F_RS0 | SFP_F_RS1, set); } static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) @@ -2648,7 +2811,7 @@ static void sfp_check_state(struct sfp *sfp) dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_names[i], !!(sfp->state & BIT(i)), !!(state & BIT(i))); - state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); + state |= sfp->state & SFP_F_OUTPUTS; sfp->state = state; mutex_unlock(&sfp->st_mutex); @@ -2790,6 +2953,7 @@ static int sfp_probe(struct platform_device *pdev) } sfp->state_hw_mask = SFP_F_PRESENT; + sfp->state_hw_drive = SFP_F_TX_DISABLE; sfp->get_state = sfp_gpio_get_state; sfp->set_state = sfp_gpio_set_state; @@ -2815,9 +2979,9 @@ static int sfp_probe(struct platform_device *pdev) */ sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; - if (sfp->gpio[GPIO_RATE_SELECT] && - gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) - sfp->state |= SFP_F_RATE_SELECT; + if (sfp->gpio[GPIO_RS0] && + gpiod_get_value_cansleep(sfp->gpio[GPIO_RS0])) + sfp->state |= SFP_F_RS0; sfp_set_state(sfp, sfp->state); sfp_module_tx_disable(sfp); if (sfp->state & SFP_F_PRESENT) { diff --git a/include/linux/sfp.h b/include/linux/sfp.h index 2f66e03e9dbd..9346cd44814d 100644 --- a/include/linux/sfp.h +++ b/include/linux/sfp.h @@ -342,6 +342,12 @@ enum { SFP_ENCODING = 11, SFP_BR_NOMINAL = 12, SFP_RATE_ID = 13, + SFF_RID_8079 = 0x01, + SFF_RID_8431_RX_ONLY = 0x02, + SFF_RID_8431_TX_ONLY = 0x04, + SFF_RID_8431 = 0x06, + SFF_RID_10G8G = 0x0e, + SFP_LINK_LEN_SM_KM = 14, SFP_LINK_LEN_SM_100M = 15, SFP_LINK_LEN_50UM_OM2_10M = 16, @@ -465,6 +471,7 @@ enum { SFP_STATUS = 110, SFP_STATUS_TX_DISABLE = BIT(7), SFP_STATUS_TX_DISABLE_FORCE = BIT(6), + SFP_STATUS_RS0_SELECT = BIT(3), SFP_STATUS_TX_FAULT = BIT(2), SFP_STATUS_RX_LOS = BIT(1), SFP_ALARM0 = 112, @@ -496,6 +503,7 @@ enum { SFP_WARN1_RXPWR_LOW = BIT(6), SFP_EXT_STATUS = 118, + SFP_EXT_STATUS_RS1_SELECT = BIT(3), SFP_EXT_STATUS_PWRLVL_SELECT = BIT(0), SFP_VSL = 120, |