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2679 lines
64 KiB
2679 lines
64 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/acpi.h> |
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#include <linux/ctype.h> |
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#include <linux/debugfs.h> |
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#include <linux/delay.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/hwmon.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/jiffies.h> |
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#include <linux/mdio/mdio-i2c.h> |
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#include <linux/module.h> |
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#include <linux/mutex.h> |
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#include <linux/of.h> |
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#include <linux/phy.h> |
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#include <linux/platform_device.h> |
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#include <linux/rtnetlink.h> |
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#include <linux/slab.h> |
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#include <linux/workqueue.h> |
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|
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#include "sfp.h" |
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#include "swphy.h" |
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enum { |
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GPIO_MODDEF0, |
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GPIO_LOS, |
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GPIO_TX_FAULT, |
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GPIO_TX_DISABLE, |
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GPIO_RATE_SELECT, |
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GPIO_MAX, |
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|
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SFP_F_PRESENT = BIT(GPIO_MODDEF0), |
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SFP_F_LOS = BIT(GPIO_LOS), |
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SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), |
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SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), |
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SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), |
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|
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SFP_E_INSERT = 0, |
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SFP_E_REMOVE, |
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SFP_E_DEV_ATTACH, |
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SFP_E_DEV_DETACH, |
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SFP_E_DEV_DOWN, |
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SFP_E_DEV_UP, |
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SFP_E_TX_FAULT, |
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SFP_E_TX_CLEAR, |
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SFP_E_LOS_HIGH, |
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SFP_E_LOS_LOW, |
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SFP_E_TIMEOUT, |
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SFP_MOD_EMPTY = 0, |
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SFP_MOD_ERROR, |
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SFP_MOD_PROBE, |
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SFP_MOD_WAITDEV, |
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SFP_MOD_HPOWER, |
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SFP_MOD_WAITPWR, |
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SFP_MOD_PRESENT, |
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SFP_DEV_DETACHED = 0, |
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SFP_DEV_DOWN, |
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SFP_DEV_UP, |
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SFP_S_DOWN = 0, |
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SFP_S_FAIL, |
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SFP_S_WAIT, |
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SFP_S_INIT, |
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SFP_S_INIT_PHY, |
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SFP_S_INIT_TX_FAULT, |
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SFP_S_WAIT_LOS, |
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SFP_S_LINK_UP, |
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SFP_S_TX_FAULT, |
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SFP_S_REINIT, |
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SFP_S_TX_DISABLE, |
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}; |
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|
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static const char * const mod_state_strings[] = { |
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[SFP_MOD_EMPTY] = "empty", |
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[SFP_MOD_ERROR] = "error", |
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[SFP_MOD_PROBE] = "probe", |
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[SFP_MOD_WAITDEV] = "waitdev", |
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[SFP_MOD_HPOWER] = "hpower", |
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[SFP_MOD_WAITPWR] = "waitpwr", |
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[SFP_MOD_PRESENT] = "present", |
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}; |
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|
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static const char *mod_state_to_str(unsigned short mod_state) |
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{ |
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if (mod_state >= ARRAY_SIZE(mod_state_strings)) |
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return "Unknown module state"; |
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return mod_state_strings[mod_state]; |
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} |
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|
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static const char * const dev_state_strings[] = { |
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[SFP_DEV_DETACHED] = "detached", |
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[SFP_DEV_DOWN] = "down", |
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[SFP_DEV_UP] = "up", |
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}; |
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|
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static const char *dev_state_to_str(unsigned short dev_state) |
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{ |
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if (dev_state >= ARRAY_SIZE(dev_state_strings)) |
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return "Unknown device state"; |
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return dev_state_strings[dev_state]; |
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} |
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static const char * const event_strings[] = { |
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[SFP_E_INSERT] = "insert", |
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[SFP_E_REMOVE] = "remove", |
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[SFP_E_DEV_ATTACH] = "dev_attach", |
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[SFP_E_DEV_DETACH] = "dev_detach", |
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[SFP_E_DEV_DOWN] = "dev_down", |
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[SFP_E_DEV_UP] = "dev_up", |
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[SFP_E_TX_FAULT] = "tx_fault", |
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[SFP_E_TX_CLEAR] = "tx_clear", |
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[SFP_E_LOS_HIGH] = "los_high", |
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[SFP_E_LOS_LOW] = "los_low", |
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[SFP_E_TIMEOUT] = "timeout", |
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}; |
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|
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static const char *event_to_str(unsigned short event) |
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{ |
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if (event >= ARRAY_SIZE(event_strings)) |
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return "Unknown event"; |
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return event_strings[event]; |
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} |
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static const char * const sm_state_strings[] = { |
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[SFP_S_DOWN] = "down", |
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[SFP_S_FAIL] = "fail", |
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[SFP_S_WAIT] = "wait", |
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[SFP_S_INIT] = "init", |
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[SFP_S_INIT_PHY] = "init_phy", |
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[SFP_S_INIT_TX_FAULT] = "init_tx_fault", |
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[SFP_S_WAIT_LOS] = "wait_los", |
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[SFP_S_LINK_UP] = "link_up", |
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[SFP_S_TX_FAULT] = "tx_fault", |
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[SFP_S_REINIT] = "reinit", |
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[SFP_S_TX_DISABLE] = "rx_disable", |
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}; |
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static const char *sm_state_to_str(unsigned short sm_state) |
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{ |
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if (sm_state >= ARRAY_SIZE(sm_state_strings)) |
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return "Unknown state"; |
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return sm_state_strings[sm_state]; |
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} |
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static const char *gpio_of_names[] = { |
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"mod-def0", |
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"los", |
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"tx-fault", |
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"tx-disable", |
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"rate-select0", |
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}; |
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static const enum gpiod_flags gpio_flags[] = { |
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GPIOD_IN, |
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GPIOD_IN, |
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GPIOD_IN, |
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GPIOD_ASIS, |
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GPIOD_ASIS, |
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}; |
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/* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a |
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* non-cooled module to initialise its laser safety circuitry. We wait |
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* an initial T_WAIT period before we check the tx fault to give any PHY |
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* on board (for a copper SFP) time to initialise. |
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*/ |
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#define T_WAIT msecs_to_jiffies(50) |
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#define T_START_UP msecs_to_jiffies(300) |
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#define T_START_UP_BAD_GPON msecs_to_jiffies(60000) |
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|
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/* t_reset is the time required to assert the TX_DISABLE signal to reset |
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* an indicated TX_FAULT. |
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*/ |
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#define T_RESET_US 10 |
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#define T_FAULT_RECOVER msecs_to_jiffies(1000) |
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|
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/* N_FAULT_INIT is the number of recovery attempts at module initialisation |
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* time. If the TX_FAULT signal is not deasserted after this number of |
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* attempts at clearing it, we decide that the module is faulty. |
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* N_FAULT is the same but after the module has initialised. |
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*/ |
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#define N_FAULT_INIT 5 |
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#define N_FAULT 5 |
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|
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/* T_PHY_RETRY is the time interval between attempts to probe the PHY. |
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* R_PHY_RETRY is the number of attempts. |
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*/ |
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#define T_PHY_RETRY msecs_to_jiffies(50) |
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#define R_PHY_RETRY 12 |
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/* SFP module presence detection is poor: the three MOD DEF signals are |
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* the same length on the PCB, which means it's possible for MOD DEF 0 to |
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* connect before the I2C bus on MOD DEF 1/2. |
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* |
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* The SFF-8472 specifies t_serial ("Time from power on until module is |
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* ready for data transmission over the two wire serial bus.") as 300ms. |
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*/ |
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#define T_SERIAL msecs_to_jiffies(300) |
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#define T_HPOWER_LEVEL msecs_to_jiffies(300) |
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#define T_PROBE_RETRY_INIT msecs_to_jiffies(100) |
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#define R_PROBE_RETRY_INIT 10 |
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#define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) |
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#define R_PROBE_RETRY_SLOW 12 |
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/* SFP modules appear to always have their PHY configured for bus address |
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* 0x56 (which with mdio-i2c, translates to a PHY address of 22). |
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*/ |
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#define SFP_PHY_ADDR 22 |
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struct sff_data { |
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unsigned int gpios; |
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bool (*module_supported)(const struct sfp_eeprom_id *id); |
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}; |
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struct sfp { |
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struct device *dev; |
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struct i2c_adapter *i2c; |
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struct mii_bus *i2c_mii; |
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struct sfp_bus *sfp_bus; |
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struct phy_device *mod_phy; |
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const struct sff_data *type; |
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size_t i2c_block_size; |
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u32 max_power_mW; |
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unsigned int (*get_state)(struct sfp *); |
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void (*set_state)(struct sfp *, unsigned int); |
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int (*read)(struct sfp *, bool, u8, void *, size_t); |
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int (*write)(struct sfp *, bool, u8, void *, size_t); |
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struct gpio_desc *gpio[GPIO_MAX]; |
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int gpio_irq[GPIO_MAX]; |
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bool need_poll; |
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struct mutex st_mutex; /* Protects state */ |
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unsigned int state_soft_mask; |
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unsigned int state; |
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struct delayed_work poll; |
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struct delayed_work timeout; |
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struct mutex sm_mutex; /* Protects state machine */ |
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unsigned char sm_mod_state; |
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unsigned char sm_mod_tries_init; |
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unsigned char sm_mod_tries; |
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unsigned char sm_dev_state; |
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unsigned short sm_state; |
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unsigned char sm_fault_retries; |
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unsigned char sm_phy_retries; |
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struct sfp_eeprom_id id; |
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unsigned int module_power_mW; |
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unsigned int module_t_start_up; |
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#if IS_ENABLED(CONFIG_HWMON) |
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struct sfp_diag diag; |
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struct delayed_work hwmon_probe; |
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unsigned int hwmon_tries; |
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struct device *hwmon_dev; |
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char *hwmon_name; |
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#endif |
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#if IS_ENABLED(CONFIG_DEBUG_FS) |
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struct dentry *debugfs_dir; |
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#endif |
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}; |
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static bool sff_module_supported(const struct sfp_eeprom_id *id) |
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{ |
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return id->base.phys_id == SFF8024_ID_SFF_8472 && |
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id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; |
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} |
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static const struct sff_data sff_data = { |
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.gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, |
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.module_supported = sff_module_supported, |
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}; |
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static bool sfp_module_supported(const struct sfp_eeprom_id *id) |
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{ |
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if (id->base.phys_id == SFF8024_ID_SFP && |
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id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP) |
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return true; |
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/* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored |
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* phys id SFF instead of SFP. Therefore mark this module explicitly |
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* as supported based on vendor name and pn match. |
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*/ |
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if (id->base.phys_id == SFF8024_ID_SFF_8472 && |
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id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP && |
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!memcmp(id->base.vendor_name, "UBNT ", 16) && |
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!memcmp(id->base.vendor_pn, "UF-INSTANT ", 16)) |
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return true; |
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return false; |
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} |
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static const struct sff_data sfp_data = { |
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.gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | |
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SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, |
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.module_supported = sfp_module_supported, |
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}; |
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static const struct of_device_id sfp_of_match[] = { |
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{ .compatible = "sff,sff", .data = &sff_data, }, |
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{ .compatible = "sff,sfp", .data = &sfp_data, }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, sfp_of_match); |
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static unsigned long poll_jiffies; |
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static unsigned int sfp_gpio_get_state(struct sfp *sfp) |
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{ |
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unsigned int i, state, v; |
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for (i = state = 0; i < GPIO_MAX; i++) { |
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if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) |
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continue; |
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v = gpiod_get_value_cansleep(sfp->gpio[i]); |
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if (v) |
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state |= BIT(i); |
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} |
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return state; |
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} |
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static unsigned int sff_gpio_get_state(struct sfp *sfp) |
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{ |
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return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; |
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} |
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static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) |
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{ |
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if (state & SFP_F_PRESENT) { |
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/* If the module is present, drive the signals */ |
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if (sfp->gpio[GPIO_TX_DISABLE]) |
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gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], |
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state & SFP_F_TX_DISABLE); |
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if (state & SFP_F_RATE_SELECT) |
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gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], |
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state & SFP_F_RATE_SELECT); |
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} else { |
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/* Otherwise, let them float to the pull-ups */ |
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if (sfp->gpio[GPIO_TX_DISABLE]) |
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gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); |
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if (state & SFP_F_RATE_SELECT) |
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gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); |
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} |
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} |
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static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, |
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size_t len) |
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{ |
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struct i2c_msg msgs[2]; |
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u8 bus_addr = a2 ? 0x51 : 0x50; |
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size_t block_size = sfp->i2c_block_size; |
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size_t this_len; |
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int ret; |
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msgs[0].addr = bus_addr; |
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msgs[0].flags = 0; |
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msgs[0].len = 1; |
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msgs[0].buf = &dev_addr; |
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msgs[1].addr = bus_addr; |
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msgs[1].flags = I2C_M_RD; |
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msgs[1].len = len; |
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msgs[1].buf = buf; |
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while (len) { |
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this_len = len; |
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if (this_len > block_size) |
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this_len = block_size; |
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msgs[1].len = this_len; |
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ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); |
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if (ret < 0) |
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return ret; |
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if (ret != ARRAY_SIZE(msgs)) |
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break; |
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msgs[1].buf += this_len; |
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dev_addr += this_len; |
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len -= this_len; |
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} |
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return msgs[1].buf - (u8 *)buf; |
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} |
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static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, |
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size_t len) |
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{ |
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struct i2c_msg msgs[1]; |
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u8 bus_addr = a2 ? 0x51 : 0x50; |
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int ret; |
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msgs[0].addr = bus_addr; |
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msgs[0].flags = 0; |
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msgs[0].len = 1 + len; |
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msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); |
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if (!msgs[0].buf) |
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return -ENOMEM; |
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msgs[0].buf[0] = dev_addr; |
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memcpy(&msgs[0].buf[1], buf, len); |
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ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); |
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kfree(msgs[0].buf); |
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if (ret < 0) |
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return ret; |
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return ret == ARRAY_SIZE(msgs) ? len : 0; |
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} |
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static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) |
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{ |
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struct mii_bus *i2c_mii; |
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int ret; |
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if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) |
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return -EINVAL; |
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sfp->i2c = i2c; |
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sfp->read = sfp_i2c_read; |
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sfp->write = sfp_i2c_write; |
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i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); |
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if (IS_ERR(i2c_mii)) |
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return PTR_ERR(i2c_mii); |
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i2c_mii->name = "SFP I2C Bus"; |
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i2c_mii->phy_mask = ~0; |
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ret = mdiobus_register(i2c_mii); |
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if (ret < 0) { |
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mdiobus_free(i2c_mii); |
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return ret; |
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} |
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sfp->i2c_mii = i2c_mii; |
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return 0; |
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} |
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|
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/* Interface */ |
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static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) |
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{ |
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return sfp->read(sfp, a2, addr, buf, len); |
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} |
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static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) |
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{ |
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return sfp->write(sfp, a2, addr, buf, len); |
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} |
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|
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static unsigned int sfp_soft_get_state(struct sfp *sfp) |
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{ |
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unsigned int state = 0; |
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u8 status; |
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int ret; |
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|
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ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)); |
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if (ret == sizeof(status)) { |
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if (status & SFP_STATUS_RX_LOS) |
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state |= SFP_F_LOS; |
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if (status & SFP_STATUS_TX_FAULT) |
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state |= SFP_F_TX_FAULT; |
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} else { |
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dev_err_ratelimited(sfp->dev, |
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"failed to read SFP soft status: %d\n", |
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ret); |
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/* Preserve the current state */ |
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state = sfp->state; |
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} |
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|
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return state & sfp->state_soft_mask; |
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} |
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|
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static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) |
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{ |
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u8 status; |
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|
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if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == |
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sizeof(status)) { |
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if (state & SFP_F_TX_DISABLE) |
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status |= SFP_STATUS_TX_DISABLE_FORCE; |
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else |
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status &= ~SFP_STATUS_TX_DISABLE_FORCE; |
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|
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sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); |
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} |
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} |
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|
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static void sfp_soft_start_poll(struct sfp *sfp) |
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{ |
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const struct sfp_eeprom_id *id = &sfp->id; |
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|
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sfp->state_soft_mask = 0; |
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if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && |
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!sfp->gpio[GPIO_TX_DISABLE]) |
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sfp->state_soft_mask |= SFP_F_TX_DISABLE; |
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if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && |
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!sfp->gpio[GPIO_TX_FAULT]) |
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sfp->state_soft_mask |= SFP_F_TX_FAULT; |
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if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && |
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!sfp->gpio[GPIO_LOS]) |
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sfp->state_soft_mask |= SFP_F_LOS; |
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|
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if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && |
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!sfp->need_poll) |
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mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); |
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} |
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|
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static void sfp_soft_stop_poll(struct sfp *sfp) |
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{ |
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sfp->state_soft_mask = 0; |
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} |
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|
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static unsigned int sfp_get_state(struct sfp *sfp) |
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{ |
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unsigned int state = sfp->get_state(sfp); |
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|
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if (state & SFP_F_PRESENT && |
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sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) |
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state |= sfp_soft_get_state(sfp); |
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|
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return state; |
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} |
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|
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static void sfp_set_state(struct sfp *sfp, unsigned int state) |
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{ |
|
sfp->set_state(sfp, state); |
|
|
|
if (state & SFP_F_PRESENT && |
|
sfp->state_soft_mask & SFP_F_TX_DISABLE) |
|
sfp_soft_set_state(sfp, state); |
|
} |
|
|
|
static unsigned int sfp_check(void *buf, size_t len) |
|
{ |
|
u8 *p, check; |
|
|
|
for (p = buf, check = 0; len; p++, len--) |
|
check += *p; |
|
|
|
return check; |
|
} |
|
|
|
/* hwmon */ |
|
#if IS_ENABLED(CONFIG_HWMON) |
|
static umode_t sfp_hwmon_is_visible(const void *data, |
|
enum hwmon_sensor_types type, |
|
u32 attr, int channel) |
|
{ |
|
const struct sfp *sfp = data; |
|
|
|
switch (type) { |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp_min_alarm: |
|
case hwmon_temp_max_alarm: |
|
case hwmon_temp_lcrit_alarm: |
|
case hwmon_temp_crit_alarm: |
|
case hwmon_temp_min: |
|
case hwmon_temp_max: |
|
case hwmon_temp_lcrit: |
|
case hwmon_temp_crit: |
|
if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) |
|
return 0; |
|
fallthrough; |
|
case hwmon_temp_input: |
|
case hwmon_temp_label: |
|
return 0444; |
|
default: |
|
return 0; |
|
} |
|
case hwmon_in: |
|
switch (attr) { |
|
case hwmon_in_min_alarm: |
|
case hwmon_in_max_alarm: |
|
case hwmon_in_lcrit_alarm: |
|
case hwmon_in_crit_alarm: |
|
case hwmon_in_min: |
|
case hwmon_in_max: |
|
case hwmon_in_lcrit: |
|
case hwmon_in_crit: |
|
if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) |
|
return 0; |
|
fallthrough; |
|
case hwmon_in_input: |
|
case hwmon_in_label: |
|
return 0444; |
|
default: |
|
return 0; |
|
} |
|
case hwmon_curr: |
|
switch (attr) { |
|
case hwmon_curr_min_alarm: |
|
case hwmon_curr_max_alarm: |
|
case hwmon_curr_lcrit_alarm: |
|
case hwmon_curr_crit_alarm: |
|
case hwmon_curr_min: |
|
case hwmon_curr_max: |
|
case hwmon_curr_lcrit: |
|
case hwmon_curr_crit: |
|
if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) |
|
return 0; |
|
fallthrough; |
|
case hwmon_curr_input: |
|
case hwmon_curr_label: |
|
return 0444; |
|
default: |
|
return 0; |
|
} |
|
case hwmon_power: |
|
/* External calibration of receive power requires |
|
* floating point arithmetic. Doing that in the kernel |
|
* is not easy, so just skip it. If the module does |
|
* not require external calibration, we can however |
|
* show receiver power, since FP is then not needed. |
|
*/ |
|
if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && |
|
channel == 1) |
|
return 0; |
|
switch (attr) { |
|
case hwmon_power_min_alarm: |
|
case hwmon_power_max_alarm: |
|
case hwmon_power_lcrit_alarm: |
|
case hwmon_power_crit_alarm: |
|
case hwmon_power_min: |
|
case hwmon_power_max: |
|
case hwmon_power_lcrit: |
|
case hwmon_power_crit: |
|
if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) |
|
return 0; |
|
fallthrough; |
|
case hwmon_power_input: |
|
case hwmon_power_label: |
|
return 0444; |
|
default: |
|
return 0; |
|
} |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) |
|
{ |
|
__be16 val; |
|
int err; |
|
|
|
err = sfp_read(sfp, true, reg, &val, sizeof(val)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = be16_to_cpu(val); |
|
|
|
return 0; |
|
} |
|
|
|
static void sfp_hwmon_to_rx_power(long *value) |
|
{ |
|
*value = DIV_ROUND_CLOSEST(*value, 10); |
|
} |
|
|
|
static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, |
|
long *value) |
|
{ |
|
if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) |
|
*value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; |
|
} |
|
|
|
static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) |
|
{ |
|
sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), |
|
be16_to_cpu(sfp->diag.cal_t_offset), value); |
|
|
|
if (*value >= 0x8000) |
|
*value -= 0x10000; |
|
|
|
*value = DIV_ROUND_CLOSEST(*value * 1000, 256); |
|
} |
|
|
|
static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) |
|
{ |
|
sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), |
|
be16_to_cpu(sfp->diag.cal_v_offset), value); |
|
|
|
*value = DIV_ROUND_CLOSEST(*value, 10); |
|
} |
|
|
|
static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) |
|
{ |
|
sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), |
|
be16_to_cpu(sfp->diag.cal_txi_offset), value); |
|
|
|
*value = DIV_ROUND_CLOSEST(*value, 500); |
|
} |
|
|
|
static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) |
|
{ |
|
sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), |
|
be16_to_cpu(sfp->diag.cal_txpwr_offset), value); |
|
|
|
*value = DIV_ROUND_CLOSEST(*value, 10); |
|
} |
|
|
|
static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) |
|
{ |
|
int err; |
|
|
|
err = sfp_hwmon_read_sensor(sfp, reg, value); |
|
if (err < 0) |
|
return err; |
|
|
|
sfp_hwmon_calibrate_temp(sfp, value); |
|
|
|
return 0; |
|
} |
|
|
|
static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) |
|
{ |
|
int err; |
|
|
|
err = sfp_hwmon_read_sensor(sfp, reg, value); |
|
if (err < 0) |
|
return err; |
|
|
|
sfp_hwmon_calibrate_vcc(sfp, value); |
|
|
|
return 0; |
|
} |
|
|
|
static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) |
|
{ |
|
int err; |
|
|
|
err = sfp_hwmon_read_sensor(sfp, reg, value); |
|
if (err < 0) |
|
return err; |
|
|
|
sfp_hwmon_calibrate_bias(sfp, value); |
|
|
|
return 0; |
|
} |
|
|
|
static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) |
|
{ |
|
int err; |
|
|
|
err = sfp_hwmon_read_sensor(sfp, reg, value); |
|
if (err < 0) |
|
return err; |
|
|
|
sfp_hwmon_calibrate_tx_power(sfp, value); |
|
|
|
return 0; |
|
} |
|
|
|
static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) |
|
{ |
|
int err; |
|
|
|
err = sfp_hwmon_read_sensor(sfp, reg, value); |
|
if (err < 0) |
|
return err; |
|
|
|
sfp_hwmon_to_rx_power(value); |
|
|
|
return 0; |
|
} |
|
|
|
static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) |
|
{ |
|
u8 status; |
|
int err; |
|
|
|
switch (attr) { |
|
case hwmon_temp_input: |
|
return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); |
|
|
|
case hwmon_temp_lcrit: |
|
*value = be16_to_cpu(sfp->diag.temp_low_alarm); |
|
sfp_hwmon_calibrate_temp(sfp, value); |
|
return 0; |
|
|
|
case hwmon_temp_min: |
|
*value = be16_to_cpu(sfp->diag.temp_low_warn); |
|
sfp_hwmon_calibrate_temp(sfp, value); |
|
return 0; |
|
case hwmon_temp_max: |
|
*value = be16_to_cpu(sfp->diag.temp_high_warn); |
|
sfp_hwmon_calibrate_temp(sfp, value); |
|
return 0; |
|
|
|
case hwmon_temp_crit: |
|
*value = be16_to_cpu(sfp->diag.temp_high_alarm); |
|
sfp_hwmon_calibrate_temp(sfp, value); |
|
return 0; |
|
|
|
case hwmon_temp_lcrit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM0_TEMP_LOW); |
|
return 0; |
|
|
|
case hwmon_temp_min_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN0_TEMP_LOW); |
|
return 0; |
|
|
|
case hwmon_temp_max_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN0_TEMP_HIGH); |
|
return 0; |
|
|
|
case hwmon_temp_crit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM0_TEMP_HIGH); |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) |
|
{ |
|
u8 status; |
|
int err; |
|
|
|
switch (attr) { |
|
case hwmon_in_input: |
|
return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); |
|
|
|
case hwmon_in_lcrit: |
|
*value = be16_to_cpu(sfp->diag.volt_low_alarm); |
|
sfp_hwmon_calibrate_vcc(sfp, value); |
|
return 0; |
|
|
|
case hwmon_in_min: |
|
*value = be16_to_cpu(sfp->diag.volt_low_warn); |
|
sfp_hwmon_calibrate_vcc(sfp, value); |
|
return 0; |
|
|
|
case hwmon_in_max: |
|
*value = be16_to_cpu(sfp->diag.volt_high_warn); |
|
sfp_hwmon_calibrate_vcc(sfp, value); |
|
return 0; |
|
|
|
case hwmon_in_crit: |
|
*value = be16_to_cpu(sfp->diag.volt_high_alarm); |
|
sfp_hwmon_calibrate_vcc(sfp, value); |
|
return 0; |
|
|
|
case hwmon_in_lcrit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM0_VCC_LOW); |
|
return 0; |
|
|
|
case hwmon_in_min_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN0_VCC_LOW); |
|
return 0; |
|
|
|
case hwmon_in_max_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN0_VCC_HIGH); |
|
return 0; |
|
|
|
case hwmon_in_crit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM0_VCC_HIGH); |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) |
|
{ |
|
u8 status; |
|
int err; |
|
|
|
switch (attr) { |
|
case hwmon_curr_input: |
|
return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); |
|
|
|
case hwmon_curr_lcrit: |
|
*value = be16_to_cpu(sfp->diag.bias_low_alarm); |
|
sfp_hwmon_calibrate_bias(sfp, value); |
|
return 0; |
|
|
|
case hwmon_curr_min: |
|
*value = be16_to_cpu(sfp->diag.bias_low_warn); |
|
sfp_hwmon_calibrate_bias(sfp, value); |
|
return 0; |
|
|
|
case hwmon_curr_max: |
|
*value = be16_to_cpu(sfp->diag.bias_high_warn); |
|
sfp_hwmon_calibrate_bias(sfp, value); |
|
return 0; |
|
|
|
case hwmon_curr_crit: |
|
*value = be16_to_cpu(sfp->diag.bias_high_alarm); |
|
sfp_hwmon_calibrate_bias(sfp, value); |
|
return 0; |
|
|
|
case hwmon_curr_lcrit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM0_TX_BIAS_LOW); |
|
return 0; |
|
|
|
case hwmon_curr_min_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN0_TX_BIAS_LOW); |
|
return 0; |
|
|
|
case hwmon_curr_max_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN0_TX_BIAS_HIGH); |
|
return 0; |
|
|
|
case hwmon_curr_crit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) |
|
{ |
|
u8 status; |
|
int err; |
|
|
|
switch (attr) { |
|
case hwmon_power_input: |
|
return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); |
|
|
|
case hwmon_power_lcrit: |
|
*value = be16_to_cpu(sfp->diag.txpwr_low_alarm); |
|
sfp_hwmon_calibrate_tx_power(sfp, value); |
|
return 0; |
|
|
|
case hwmon_power_min: |
|
*value = be16_to_cpu(sfp->diag.txpwr_low_warn); |
|
sfp_hwmon_calibrate_tx_power(sfp, value); |
|
return 0; |
|
|
|
case hwmon_power_max: |
|
*value = be16_to_cpu(sfp->diag.txpwr_high_warn); |
|
sfp_hwmon_calibrate_tx_power(sfp, value); |
|
return 0; |
|
|
|
case hwmon_power_crit: |
|
*value = be16_to_cpu(sfp->diag.txpwr_high_alarm); |
|
sfp_hwmon_calibrate_tx_power(sfp, value); |
|
return 0; |
|
|
|
case hwmon_power_lcrit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM0_TXPWR_LOW); |
|
return 0; |
|
|
|
case hwmon_power_min_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN0_TXPWR_LOW); |
|
return 0; |
|
|
|
case hwmon_power_max_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN0_TXPWR_HIGH); |
|
return 0; |
|
|
|
case hwmon_power_crit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM0_TXPWR_HIGH); |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) |
|
{ |
|
u8 status; |
|
int err; |
|
|
|
switch (attr) { |
|
case hwmon_power_input: |
|
return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); |
|
|
|
case hwmon_power_lcrit: |
|
*value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); |
|
sfp_hwmon_to_rx_power(value); |
|
return 0; |
|
|
|
case hwmon_power_min: |
|
*value = be16_to_cpu(sfp->diag.rxpwr_low_warn); |
|
sfp_hwmon_to_rx_power(value); |
|
return 0; |
|
|
|
case hwmon_power_max: |
|
*value = be16_to_cpu(sfp->diag.rxpwr_high_warn); |
|
sfp_hwmon_to_rx_power(value); |
|
return 0; |
|
|
|
case hwmon_power_crit: |
|
*value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); |
|
sfp_hwmon_to_rx_power(value); |
|
return 0; |
|
|
|
case hwmon_power_lcrit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM1_RXPWR_LOW); |
|
return 0; |
|
|
|
case hwmon_power_min_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN1_RXPWR_LOW); |
|
return 0; |
|
|
|
case hwmon_power_max_alarm: |
|
err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_WARN1_RXPWR_HIGH); |
|
return 0; |
|
|
|
case hwmon_power_crit_alarm: |
|
err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); |
|
if (err < 0) |
|
return err; |
|
|
|
*value = !!(status & SFP_ALARM1_RXPWR_HIGH); |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, |
|
u32 attr, int channel, long *value) |
|
{ |
|
struct sfp *sfp = dev_get_drvdata(dev); |
|
|
|
switch (type) { |
|
case hwmon_temp: |
|
return sfp_hwmon_temp(sfp, attr, value); |
|
case hwmon_in: |
|
return sfp_hwmon_vcc(sfp, attr, value); |
|
case hwmon_curr: |
|
return sfp_hwmon_bias(sfp, attr, value); |
|
case hwmon_power: |
|
switch (channel) { |
|
case 0: |
|
return sfp_hwmon_tx_power(sfp, attr, value); |
|
case 1: |
|
return sfp_hwmon_rx_power(sfp, attr, value); |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static const char *const sfp_hwmon_power_labels[] = { |
|
"TX_power", |
|
"RX_power", |
|
}; |
|
|
|
static int sfp_hwmon_read_string(struct device *dev, |
|
enum hwmon_sensor_types type, |
|
u32 attr, int channel, const char **str) |
|
{ |
|
switch (type) { |
|
case hwmon_curr: |
|
switch (attr) { |
|
case hwmon_curr_label: |
|
*str = "bias"; |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
break; |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp_label: |
|
*str = "temperature"; |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
break; |
|
case hwmon_in: |
|
switch (attr) { |
|
case hwmon_in_label: |
|
*str = "VCC"; |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
break; |
|
case hwmon_power: |
|
switch (attr) { |
|
case hwmon_power_label: |
|
*str = sfp_hwmon_power_labels[channel]; |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
break; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static const struct hwmon_ops sfp_hwmon_ops = { |
|
.is_visible = sfp_hwmon_is_visible, |
|
.read = sfp_hwmon_read, |
|
.read_string = sfp_hwmon_read_string, |
|
}; |
|
|
|
static u32 sfp_hwmon_chip_config[] = { |
|
HWMON_C_REGISTER_TZ, |
|
0, |
|
}; |
|
|
|
static const struct hwmon_channel_info sfp_hwmon_chip = { |
|
.type = hwmon_chip, |
|
.config = sfp_hwmon_chip_config, |
|
}; |
|
|
|
static u32 sfp_hwmon_temp_config[] = { |
|
HWMON_T_INPUT | |
|
HWMON_T_MAX | HWMON_T_MIN | |
|
HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | |
|
HWMON_T_CRIT | HWMON_T_LCRIT | |
|
HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | |
|
HWMON_T_LABEL, |
|
0, |
|
}; |
|
|
|
static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { |
|
.type = hwmon_temp, |
|
.config = sfp_hwmon_temp_config, |
|
}; |
|
|
|
static u32 sfp_hwmon_vcc_config[] = { |
|
HWMON_I_INPUT | |
|
HWMON_I_MAX | HWMON_I_MIN | |
|
HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | |
|
HWMON_I_CRIT | HWMON_I_LCRIT | |
|
HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | |
|
HWMON_I_LABEL, |
|
0, |
|
}; |
|
|
|
static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { |
|
.type = hwmon_in, |
|
.config = sfp_hwmon_vcc_config, |
|
}; |
|
|
|
static u32 sfp_hwmon_bias_config[] = { |
|
HWMON_C_INPUT | |
|
HWMON_C_MAX | HWMON_C_MIN | |
|
HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | |
|
HWMON_C_CRIT | HWMON_C_LCRIT | |
|
HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | |
|
HWMON_C_LABEL, |
|
0, |
|
}; |
|
|
|
static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { |
|
.type = hwmon_curr, |
|
.config = sfp_hwmon_bias_config, |
|
}; |
|
|
|
static u32 sfp_hwmon_power_config[] = { |
|
/* Transmit power */ |
|
HWMON_P_INPUT | |
|
HWMON_P_MAX | HWMON_P_MIN | |
|
HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | |
|
HWMON_P_CRIT | HWMON_P_LCRIT | |
|
HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | |
|
HWMON_P_LABEL, |
|
/* Receive power */ |
|
HWMON_P_INPUT | |
|
HWMON_P_MAX | HWMON_P_MIN | |
|
HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | |
|
HWMON_P_CRIT | HWMON_P_LCRIT | |
|
HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | |
|
HWMON_P_LABEL, |
|
0, |
|
}; |
|
|
|
static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { |
|
.type = hwmon_power, |
|
.config = sfp_hwmon_power_config, |
|
}; |
|
|
|
static const struct hwmon_channel_info *sfp_hwmon_info[] = { |
|
&sfp_hwmon_chip, |
|
&sfp_hwmon_vcc_channel_info, |
|
&sfp_hwmon_temp_channel_info, |
|
&sfp_hwmon_bias_channel_info, |
|
&sfp_hwmon_power_channel_info, |
|
NULL, |
|
}; |
|
|
|
static const struct hwmon_chip_info sfp_hwmon_chip_info = { |
|
.ops = &sfp_hwmon_ops, |
|
.info = sfp_hwmon_info, |
|
}; |
|
|
|
static void sfp_hwmon_probe(struct work_struct *work) |
|
{ |
|
struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); |
|
int err, i; |
|
|
|
/* hwmon interface needs to access 16bit registers in atomic way to |
|
* guarantee coherency of the diagnostic monitoring data. If it is not |
|
* possible to guarantee coherency because EEPROM is broken in such way |
|
* that does not support atomic 16bit read operation then we have to |
|
* skip registration of hwmon device. |
|
*/ |
|
if (sfp->i2c_block_size < 2) { |
|
dev_info(sfp->dev, |
|
"skipping hwmon device registration due to broken EEPROM\n"); |
|
dev_info(sfp->dev, |
|
"diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n"); |
|
return; |
|
} |
|
|
|
err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); |
|
if (err < 0) { |
|
if (sfp->hwmon_tries--) { |
|
mod_delayed_work(system_wq, &sfp->hwmon_probe, |
|
T_PROBE_RETRY_SLOW); |
|
} else { |
|
dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); |
|
} |
|
return; |
|
} |
|
|
|
sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); |
|
if (!sfp->hwmon_name) { |
|
dev_err(sfp->dev, "out of memory for hwmon name\n"); |
|
return; |
|
} |
|
|
|
for (i = 0; sfp->hwmon_name[i]; i++) |
|
if (hwmon_is_bad_char(sfp->hwmon_name[i])) |
|
sfp->hwmon_name[i] = '_'; |
|
|
|
sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, |
|
sfp->hwmon_name, sfp, |
|
&sfp_hwmon_chip_info, |
|
NULL); |
|
if (IS_ERR(sfp->hwmon_dev)) |
|
dev_err(sfp->dev, "failed to register hwmon device: %ld\n", |
|
PTR_ERR(sfp->hwmon_dev)); |
|
} |
|
|
|
static int sfp_hwmon_insert(struct sfp *sfp) |
|
{ |
|
if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) |
|
return 0; |
|
|
|
if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) |
|
return 0; |
|
|
|
if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) |
|
/* This driver in general does not support address |
|
* change. |
|
*/ |
|
return 0; |
|
|
|
mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); |
|
sfp->hwmon_tries = R_PROBE_RETRY_SLOW; |
|
|
|
return 0; |
|
} |
|
|
|
static void sfp_hwmon_remove(struct sfp *sfp) |
|
{ |
|
cancel_delayed_work_sync(&sfp->hwmon_probe); |
|
if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { |
|
hwmon_device_unregister(sfp->hwmon_dev); |
|
sfp->hwmon_dev = NULL; |
|
kfree(sfp->hwmon_name); |
|
} |
|
} |
|
|
|
static int sfp_hwmon_init(struct sfp *sfp) |
|
{ |
|
INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); |
|
|
|
return 0; |
|
} |
|
|
|
static void sfp_hwmon_exit(struct sfp *sfp) |
|
{ |
|
cancel_delayed_work_sync(&sfp->hwmon_probe); |
|
} |
|
#else |
|
static int sfp_hwmon_insert(struct sfp *sfp) |
|
{ |
|
return 0; |
|
} |
|
|
|
static void sfp_hwmon_remove(struct sfp *sfp) |
|
{ |
|
} |
|
|
|
static int sfp_hwmon_init(struct sfp *sfp) |
|
{ |
|
return 0; |
|
} |
|
|
|
static void sfp_hwmon_exit(struct sfp *sfp) |
|
{ |
|
} |
|
#endif |
|
|
|
/* Helpers */ |
|
static void sfp_module_tx_disable(struct sfp *sfp) |
|
{ |
|
dev_dbg(sfp->dev, "tx disable %u -> %u\n", |
|
sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); |
|
sfp->state |= SFP_F_TX_DISABLE; |
|
sfp_set_state(sfp, sfp->state); |
|
} |
|
|
|
static void sfp_module_tx_enable(struct sfp *sfp) |
|
{ |
|
dev_dbg(sfp->dev, "tx disable %u -> %u\n", |
|
sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); |
|
sfp->state &= ~SFP_F_TX_DISABLE; |
|
sfp_set_state(sfp, sfp->state); |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_DEBUG_FS) |
|
static int sfp_debug_state_show(struct seq_file *s, void *data) |
|
{ |
|
struct sfp *sfp = s->private; |
|
|
|
seq_printf(s, "Module state: %s\n", |
|
mod_state_to_str(sfp->sm_mod_state)); |
|
seq_printf(s, "Module probe attempts: %d %d\n", |
|
R_PROBE_RETRY_INIT - sfp->sm_mod_tries_init, |
|
R_PROBE_RETRY_SLOW - sfp->sm_mod_tries); |
|
seq_printf(s, "Device state: %s\n", |
|
dev_state_to_str(sfp->sm_dev_state)); |
|
seq_printf(s, "Main state: %s\n", |
|
sm_state_to_str(sfp->sm_state)); |
|
seq_printf(s, "Fault recovery remaining retries: %d\n", |
|
sfp->sm_fault_retries); |
|
seq_printf(s, "PHY probe remaining retries: %d\n", |
|
sfp->sm_phy_retries); |
|
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)); |
|
return 0; |
|
} |
|
DEFINE_SHOW_ATTRIBUTE(sfp_debug_state); |
|
|
|
static void sfp_debugfs_init(struct sfp *sfp) |
|
{ |
|
sfp->debugfs_dir = debugfs_create_dir(dev_name(sfp->dev), NULL); |
|
|
|
debugfs_create_file("state", 0600, sfp->debugfs_dir, sfp, |
|
&sfp_debug_state_fops); |
|
} |
|
|
|
static void sfp_debugfs_exit(struct sfp *sfp) |
|
{ |
|
debugfs_remove_recursive(sfp->debugfs_dir); |
|
} |
|
#else |
|
static void sfp_debugfs_init(struct sfp *sfp) |
|
{ |
|
} |
|
|
|
static void sfp_debugfs_exit(struct sfp *sfp) |
|
{ |
|
} |
|
#endif |
|
|
|
static void sfp_module_tx_fault_reset(struct sfp *sfp) |
|
{ |
|
unsigned int state = sfp->state; |
|
|
|
if (state & SFP_F_TX_DISABLE) |
|
return; |
|
|
|
sfp_set_state(sfp, state | SFP_F_TX_DISABLE); |
|
|
|
udelay(T_RESET_US); |
|
|
|
sfp_set_state(sfp, state); |
|
} |
|
|
|
/* SFP state machine */ |
|
static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) |
|
{ |
|
if (timeout) |
|
mod_delayed_work(system_power_efficient_wq, &sfp->timeout, |
|
timeout); |
|
else |
|
cancel_delayed_work(&sfp->timeout); |
|
} |
|
|
|
static void sfp_sm_next(struct sfp *sfp, unsigned int state, |
|
unsigned int timeout) |
|
{ |
|
sfp->sm_state = state; |
|
sfp_sm_set_timer(sfp, timeout); |
|
} |
|
|
|
static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, |
|
unsigned int timeout) |
|
{ |
|
sfp->sm_mod_state = state; |
|
sfp_sm_set_timer(sfp, timeout); |
|
} |
|
|
|
static void sfp_sm_phy_detach(struct sfp *sfp) |
|
{ |
|
sfp_remove_phy(sfp->sfp_bus); |
|
phy_device_remove(sfp->mod_phy); |
|
phy_device_free(sfp->mod_phy); |
|
sfp->mod_phy = NULL; |
|
} |
|
|
|
static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) |
|
{ |
|
struct phy_device *phy; |
|
int err; |
|
|
|
phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); |
|
if (phy == ERR_PTR(-ENODEV)) |
|
return PTR_ERR(phy); |
|
if (IS_ERR(phy)) { |
|
dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); |
|
return PTR_ERR(phy); |
|
} |
|
|
|
err = phy_device_register(phy); |
|
if (err) { |
|
phy_device_free(phy); |
|
dev_err(sfp->dev, "phy_device_register failed: %d\n", err); |
|
return err; |
|
} |
|
|
|
err = sfp_add_phy(sfp->sfp_bus, phy); |
|
if (err) { |
|
phy_device_remove(phy); |
|
phy_device_free(phy); |
|
dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); |
|
return err; |
|
} |
|
|
|
sfp->mod_phy = phy; |
|
|
|
return 0; |
|
} |
|
|
|
static void sfp_sm_link_up(struct sfp *sfp) |
|
{ |
|
sfp_link_up(sfp->sfp_bus); |
|
sfp_sm_next(sfp, SFP_S_LINK_UP, 0); |
|
} |
|
|
|
static void sfp_sm_link_down(struct sfp *sfp) |
|
{ |
|
sfp_link_down(sfp->sfp_bus); |
|
} |
|
|
|
static void sfp_sm_link_check_los(struct sfp *sfp) |
|
{ |
|
const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); |
|
const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); |
|
__be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); |
|
bool los = false; |
|
|
|
/* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL |
|
* are set, we assume that no LOS signal is available. If both are |
|
* set, we assume LOS is not implemented (and is meaningless.) |
|
*/ |
|
if (los_options == los_inverted) |
|
los = !(sfp->state & SFP_F_LOS); |
|
else if (los_options == los_normal) |
|
los = !!(sfp->state & SFP_F_LOS); |
|
|
|
if (los) |
|
sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); |
|
else |
|
sfp_sm_link_up(sfp); |
|
} |
|
|
|
static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) |
|
{ |
|
const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); |
|
const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); |
|
__be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); |
|
|
|
return (los_options == los_inverted && event == SFP_E_LOS_LOW) || |
|
(los_options == los_normal && event == SFP_E_LOS_HIGH); |
|
} |
|
|
|
static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) |
|
{ |
|
const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED); |
|
const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL); |
|
__be16 los_options = sfp->id.ext.options & (los_inverted | los_normal); |
|
|
|
return (los_options == los_inverted && event == SFP_E_LOS_HIGH) || |
|
(los_options == los_normal && event == SFP_E_LOS_LOW); |
|
} |
|
|
|
static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) |
|
{ |
|
if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { |
|
dev_err(sfp->dev, |
|
"module persistently indicates fault, disabling\n"); |
|
sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); |
|
} else { |
|
if (warn) |
|
dev_err(sfp->dev, "module transmit fault indicated\n"); |
|
|
|
sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); |
|
} |
|
} |
|
|
|
/* Probe a SFP for a PHY device if the module supports copper - the PHY |
|
* normally sits at I2C bus address 0x56, and may either be a clause 22 |
|
* or clause 45 PHY. |
|
* |
|
* Clause 22 copper SFP modules normally operate in Cisco SGMII mode with |
|
* negotiation enabled, but some may be in 1000base-X - which is for the |
|
* PHY driver to determine. |
|
* |
|
* Clause 45 copper SFP+ modules (10G) appear to switch their interface |
|
* mode according to the negotiated line speed. |
|
*/ |
|
static int sfp_sm_probe_for_phy(struct sfp *sfp) |
|
{ |
|
int err = 0; |
|
|
|
switch (sfp->id.base.extended_cc) { |
|
case SFF8024_ECC_10GBASE_T_SFI: |
|
case SFF8024_ECC_10GBASE_T_SR: |
|
case SFF8024_ECC_5GBASE_T: |
|
case SFF8024_ECC_2_5GBASE_T: |
|
err = sfp_sm_probe_phy(sfp, true); |
|
break; |
|
|
|
default: |
|
if (sfp->id.base.e1000_base_t) |
|
err = sfp_sm_probe_phy(sfp, false); |
|
break; |
|
} |
|
return err; |
|
} |
|
|
|
static int sfp_module_parse_power(struct sfp *sfp) |
|
{ |
|
u32 power_mW = 1000; |
|
|
|
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) |
|
power_mW = 1500; |
|
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) |
|
power_mW = 2000; |
|
|
|
if (power_mW > sfp->max_power_mW) { |
|
/* Module power specification exceeds the allowed maximum. */ |
|
if (sfp->id.ext.sff8472_compliance == |
|
SFP_SFF8472_COMPLIANCE_NONE && |
|
!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { |
|
/* The module appears not to implement bus address |
|
* 0xa2, so assume that the module powers up in the |
|
* indicated mode. |
|
*/ |
|
dev_err(sfp->dev, |
|
"Host does not support %u.%uW modules\n", |
|
power_mW / 1000, (power_mW / 100) % 10); |
|
return -EINVAL; |
|
} else { |
|
dev_warn(sfp->dev, |
|
"Host does not support %u.%uW modules, module left in power mode 1\n", |
|
power_mW / 1000, (power_mW / 100) % 10); |
|
return 0; |
|
} |
|
} |
|
|
|
/* If the module requires a higher power mode, but also requires |
|
* an address change sequence, warn the user that the module may |
|
* not be functional. |
|
*/ |
|
if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { |
|
dev_warn(sfp->dev, |
|
"Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", |
|
power_mW / 1000, (power_mW / 100) % 10); |
|
return 0; |
|
} |
|
|
|
sfp->module_power_mW = power_mW; |
|
|
|
return 0; |
|
} |
|
|
|
static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) |
|
{ |
|
u8 val; |
|
int err; |
|
|
|
err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); |
|
if (err != sizeof(val)) { |
|
dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); |
|
return -EAGAIN; |
|
} |
|
|
|
/* DM7052 reports as a high power module, responds to reads (with |
|
* all bytes 0xff) at 0x51 but does not accept writes. In any case, |
|
* if the bit is already set, we're already in high power mode. |
|
*/ |
|
if (!!(val & BIT(0)) == enable) |
|
return 0; |
|
|
|
if (enable) |
|
val |= BIT(0); |
|
else |
|
val &= ~BIT(0); |
|
|
|
err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); |
|
if (err != sizeof(val)) { |
|
dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); |
|
return -EAGAIN; |
|
} |
|
|
|
if (enable) |
|
dev_info(sfp->dev, "Module switched to %u.%uW power level\n", |
|
sfp->module_power_mW / 1000, |
|
(sfp->module_power_mW / 100) % 10); |
|
|
|
return 0; |
|
} |
|
|
|
/* 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 |
|
* operation returns just one byte of EEPROM followed by zeros. There is |
|
* no way to identify which modules are using Realtek RTL8672 and RTL9601C |
|
* chips. Moreover every OEM of V-SOL V2801F module puts its own vendor |
|
* name and vendor id into EEPROM, so there is even no way to detect if |
|
* module is V-SOL V2801F. Therefore check for those zeros in the read |
|
* data and then based on check switch to reading EEPROM to one byte |
|
* at a time. |
|
*/ |
|
static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len) |
|
{ |
|
size_t i, block_size = sfp->i2c_block_size; |
|
|
|
/* Already using byte IO */ |
|
if (block_size == 1) |
|
return false; |
|
|
|
for (i = 1; i < len; i += block_size) { |
|
if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i))) |
|
return false; |
|
} |
|
return true; |
|
} |
|
|
|
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; |
|
|
|
/* Some SFP modules and also some Linux I2C drivers do not like reads |
|
* longer than 16 bytes, so read the EEPROM in chunks of 16 bytes at |
|
* a time. |
|
*/ |
|
sfp->i2c_block_size = 16; |
|
|
|
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.base)) { |
|
dev_err(sfp->dev, "EEPROM short read: %d\n", ret); |
|
return -EAGAIN; |
|
} |
|
|
|
/* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from |
|
* address 0x51 is just one byte at a time. Also SFF-8472 requires |
|
* that EEPROM supports atomic 16bit read operation for diagnostic |
|
* fields, so do not switch to one byte reading at a time unless it |
|
* is really required and we have no other option. |
|
*/ |
|
if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) { |
|
dev_info(sfp->dev, |
|
"Detected broken RTL8672/RTL9601C emulated EEPROM\n"); |
|
dev_info(sfp->dev, |
|
"Switching to reading EEPROM to one byte at a time\n"); |
|
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.base)) { |
|
dev_err(sfp->dev, "EEPROM short read: %d\n", ret); |
|
return -EAGAIN; |
|
} |
|
} |
|
|
|
/* Cotsworks do not seem to update the checksums when they |
|
* do the final programming with the final module part number, |
|
* 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); |
|
if (check != id.base.cc_base) { |
|
if (cotsworks) { |
|
dev_warn(sfp->dev, |
|
"EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", |
|
check, id.base.cc_base); |
|
} else { |
|
dev_err(sfp->dev, |
|
"EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", |
|
check, id.base.cc_base); |
|
print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, |
|
16, 1, &id, sizeof(id), true); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
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) { |
|
dev_warn(sfp->dev, |
|
"EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", |
|
check, id.ext.cc_ext); |
|
} else { |
|
dev_err(sfp->dev, |
|
"EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", |
|
check, id.ext.cc_ext); |
|
print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, |
|
16, 1, &id, sizeof(id), true); |
|
memset(&id.ext, 0, sizeof(id.ext)); |
|
} |
|
} |
|
|
|
sfp->id = id; |
|
|
|
dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", |
|
(int)sizeof(id.base.vendor_name), id.base.vendor_name, |
|
(int)sizeof(id.base.vendor_pn), id.base.vendor_pn, |
|
(int)sizeof(id.base.vendor_rev), id.base.vendor_rev, |
|
(int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, |
|
(int)sizeof(id.ext.datecode), id.ext.datecode); |
|
|
|
/* Check whether we support this module */ |
|
if (!sfp->type->module_supported(&id)) { |
|
dev_err(sfp->dev, |
|
"module is not supported - phys id 0x%02x 0x%02x\n", |
|
sfp->id.base.phys_id, sfp->id.base.phys_ext_id); |
|
return -EINVAL; |
|
} |
|
|
|
/* If the module requires address swap mode, warn about it */ |
|
if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) |
|
dev_warn(sfp->dev, |
|
"module address swap to access page 0xA2 is not supported.\n"); |
|
|
|
/* Parse the module power requirement */ |
|
ret = sfp_module_parse_power(sfp); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && |
|
!memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) |
|
sfp->module_t_start_up = T_START_UP_BAD_GPON; |
|
else |
|
sfp->module_t_start_up = T_START_UP; |
|
|
|
return 0; |
|
} |
|
|
|
static void sfp_sm_mod_remove(struct sfp *sfp) |
|
{ |
|
if (sfp->sm_mod_state > SFP_MOD_WAITDEV) |
|
sfp_module_remove(sfp->sfp_bus); |
|
|
|
sfp_hwmon_remove(sfp); |
|
|
|
memset(&sfp->id, 0, sizeof(sfp->id)); |
|
sfp->module_power_mW = 0; |
|
|
|
dev_info(sfp->dev, "module removed\n"); |
|
} |
|
|
|
/* This state machine tracks the upstream's state */ |
|
static void sfp_sm_device(struct sfp *sfp, unsigned int event) |
|
{ |
|
switch (sfp->sm_dev_state) { |
|
default: |
|
if (event == SFP_E_DEV_ATTACH) |
|
sfp->sm_dev_state = SFP_DEV_DOWN; |
|
break; |
|
|
|
case SFP_DEV_DOWN: |
|
if (event == SFP_E_DEV_DETACH) |
|
sfp->sm_dev_state = SFP_DEV_DETACHED; |
|
else if (event == SFP_E_DEV_UP) |
|
sfp->sm_dev_state = SFP_DEV_UP; |
|
break; |
|
|
|
case SFP_DEV_UP: |
|
if (event == SFP_E_DEV_DETACH) |
|
sfp->sm_dev_state = SFP_DEV_DETACHED; |
|
else if (event == SFP_E_DEV_DOWN) |
|
sfp->sm_dev_state = SFP_DEV_DOWN; |
|
break; |
|
} |
|
} |
|
|
|
/* This state machine tracks the insert/remove state of the module, probes |
|
* the on-board EEPROM, and sets up the power level. |
|
*/ |
|
static void sfp_sm_module(struct sfp *sfp, unsigned int event) |
|
{ |
|
int err; |
|
|
|
/* Handle remove event globally, it resets this state machine */ |
|
if (event == SFP_E_REMOVE) { |
|
if (sfp->sm_mod_state > SFP_MOD_PROBE) |
|
sfp_sm_mod_remove(sfp); |
|
sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); |
|
return; |
|
} |
|
|
|
/* Handle device detach globally */ |
|
if (sfp->sm_dev_state < SFP_DEV_DOWN && |
|
sfp->sm_mod_state > SFP_MOD_WAITDEV) { |
|
if (sfp->module_power_mW > 1000 && |
|
sfp->sm_mod_state > SFP_MOD_HPOWER) |
|
sfp_sm_mod_hpower(sfp, false); |
|
sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); |
|
return; |
|
} |
|
|
|
switch (sfp->sm_mod_state) { |
|
default: |
|
if (event == SFP_E_INSERT) { |
|
sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); |
|
sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; |
|
sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; |
|
} |
|
break; |
|
|
|
case SFP_MOD_PROBE: |
|
/* Wait for T_PROBE_INIT to time out */ |
|
if (event != SFP_E_TIMEOUT) |
|
break; |
|
|
|
err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); |
|
if (err == -EAGAIN) { |
|
if (sfp->sm_mod_tries_init && |
|
--sfp->sm_mod_tries_init) { |
|
sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); |
|
break; |
|
} else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { |
|
if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) |
|
dev_warn(sfp->dev, |
|
"please wait, module slow to respond\n"); |
|
sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); |
|
break; |
|
} |
|
} |
|
if (err < 0) { |
|
sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); |
|
break; |
|
} |
|
|
|
err = sfp_hwmon_insert(sfp); |
|
if (err) |
|
dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); |
|
|
|
sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); |
|
fallthrough; |
|
case SFP_MOD_WAITDEV: |
|
/* Ensure that the device is attached before proceeding */ |
|
if (sfp->sm_dev_state < SFP_DEV_DOWN) |
|
break; |
|
|
|
/* Report the module insertion to the upstream device */ |
|
err = sfp_module_insert(sfp->sfp_bus, &sfp->id); |
|
if (err < 0) { |
|
sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); |
|
break; |
|
} |
|
|
|
/* If this is a power level 1 module, we are done */ |
|
if (sfp->module_power_mW <= 1000) |
|
goto insert; |
|
|
|
sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); |
|
fallthrough; |
|
case SFP_MOD_HPOWER: |
|
/* Enable high power mode */ |
|
err = sfp_sm_mod_hpower(sfp, true); |
|
if (err < 0) { |
|
if (err != -EAGAIN) { |
|
sfp_module_remove(sfp->sfp_bus); |
|
sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); |
|
} else { |
|
sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); |
|
} |
|
break; |
|
} |
|
|
|
sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); |
|
break; |
|
|
|
case SFP_MOD_WAITPWR: |
|
/* Wait for T_HPOWER_LEVEL to time out */ |
|
if (event != SFP_E_TIMEOUT) |
|
break; |
|
|
|
insert: |
|
sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); |
|
break; |
|
|
|
case SFP_MOD_PRESENT: |
|
case SFP_MOD_ERROR: |
|
break; |
|
} |
|
} |
|
|
|
static void sfp_sm_main(struct sfp *sfp, unsigned int event) |
|
{ |
|
unsigned long timeout; |
|
int ret; |
|
|
|
/* Some events are global */ |
|
if (sfp->sm_state != SFP_S_DOWN && |
|
(sfp->sm_mod_state != SFP_MOD_PRESENT || |
|
sfp->sm_dev_state != SFP_DEV_UP)) { |
|
if (sfp->sm_state == SFP_S_LINK_UP && |
|
sfp->sm_dev_state == SFP_DEV_UP) |
|
sfp_sm_link_down(sfp); |
|
if (sfp->sm_state > SFP_S_INIT) |
|
sfp_module_stop(sfp->sfp_bus); |
|
if (sfp->mod_phy) |
|
sfp_sm_phy_detach(sfp); |
|
sfp_module_tx_disable(sfp); |
|
sfp_soft_stop_poll(sfp); |
|
sfp_sm_next(sfp, SFP_S_DOWN, 0); |
|
return; |
|
} |
|
|
|
/* The main state machine */ |
|
switch (sfp->sm_state) { |
|
case SFP_S_DOWN: |
|
if (sfp->sm_mod_state != SFP_MOD_PRESENT || |
|
sfp->sm_dev_state != SFP_DEV_UP) |
|
break; |
|
|
|
if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) |
|
sfp_soft_start_poll(sfp); |
|
|
|
sfp_module_tx_enable(sfp); |
|
|
|
/* Initialise the fault clearance retries */ |
|
sfp->sm_fault_retries = N_FAULT_INIT; |
|
|
|
/* We need to check the TX_FAULT state, which is not defined |
|
* while TX_DISABLE is asserted. The earliest we want to do |
|
* anything (such as probe for a PHY) is 50ms. |
|
*/ |
|
sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); |
|
break; |
|
|
|
case SFP_S_WAIT: |
|
if (event != SFP_E_TIMEOUT) |
|
break; |
|
|
|
if (sfp->state & SFP_F_TX_FAULT) { |
|
/* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) |
|
* from the TX_DISABLE deassertion for the module to |
|
* initialise, which is indicated by TX_FAULT |
|
* deasserting. |
|
*/ |
|
timeout = sfp->module_t_start_up; |
|
if (timeout > T_WAIT) |
|
timeout -= T_WAIT; |
|
else |
|
timeout = 1; |
|
|
|
sfp_sm_next(sfp, SFP_S_INIT, timeout); |
|
} else { |
|
/* TX_FAULT is not asserted, assume the module has |
|
* finished initialising. |
|
*/ |
|
goto init_done; |
|
} |
|
break; |
|
|
|
case SFP_S_INIT: |
|
if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { |
|
/* TX_FAULT is still asserted after t_init |
|
* or t_start_up, so assume there is a fault. |
|
*/ |
|
sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, |
|
sfp->sm_fault_retries == N_FAULT_INIT); |
|
} else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { |
|
init_done: |
|
sfp->sm_phy_retries = R_PHY_RETRY; |
|
goto phy_probe; |
|
} |
|
break; |
|
|
|
case SFP_S_INIT_PHY: |
|
if (event != SFP_E_TIMEOUT) |
|
break; |
|
phy_probe: |
|
/* TX_FAULT deasserted or we timed out with TX_FAULT |
|
* clear. Probe for the PHY and check the LOS state. |
|
*/ |
|
ret = sfp_sm_probe_for_phy(sfp); |
|
if (ret == -ENODEV) { |
|
if (--sfp->sm_phy_retries) { |
|
sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); |
|
break; |
|
} else { |
|
dev_info(sfp->dev, "no PHY detected\n"); |
|
} |
|
} else if (ret) { |
|
sfp_sm_next(sfp, SFP_S_FAIL, 0); |
|
break; |
|
} |
|
if (sfp_module_start(sfp->sfp_bus)) { |
|
sfp_sm_next(sfp, SFP_S_FAIL, 0); |
|
break; |
|
} |
|
sfp_sm_link_check_los(sfp); |
|
|
|
/* Reset the fault retry count */ |
|
sfp->sm_fault_retries = N_FAULT; |
|
break; |
|
|
|
case SFP_S_INIT_TX_FAULT: |
|
if (event == SFP_E_TIMEOUT) { |
|
sfp_module_tx_fault_reset(sfp); |
|
sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); |
|
} |
|
break; |
|
|
|
case SFP_S_WAIT_LOS: |
|
if (event == SFP_E_TX_FAULT) |
|
sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); |
|
else if (sfp_los_event_inactive(sfp, event)) |
|
sfp_sm_link_up(sfp); |
|
break; |
|
|
|
case SFP_S_LINK_UP: |
|
if (event == SFP_E_TX_FAULT) { |
|
sfp_sm_link_down(sfp); |
|
sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); |
|
} else if (sfp_los_event_active(sfp, event)) { |
|
sfp_sm_link_down(sfp); |
|
sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); |
|
} |
|
break; |
|
|
|
case SFP_S_TX_FAULT: |
|
if (event == SFP_E_TIMEOUT) { |
|
sfp_module_tx_fault_reset(sfp); |
|
sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); |
|
} |
|
break; |
|
|
|
case SFP_S_REINIT: |
|
if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { |
|
sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); |
|
} else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { |
|
dev_info(sfp->dev, "module transmit fault recovered\n"); |
|
sfp_sm_link_check_los(sfp); |
|
} |
|
break; |
|
|
|
case SFP_S_TX_DISABLE: |
|
break; |
|
} |
|
} |
|
|
|
static void sfp_sm_event(struct sfp *sfp, unsigned int event) |
|
{ |
|
mutex_lock(&sfp->sm_mutex); |
|
|
|
dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", |
|
mod_state_to_str(sfp->sm_mod_state), |
|
dev_state_to_str(sfp->sm_dev_state), |
|
sm_state_to_str(sfp->sm_state), |
|
event_to_str(event)); |
|
|
|
sfp_sm_device(sfp, event); |
|
sfp_sm_module(sfp, event); |
|
sfp_sm_main(sfp, event); |
|
|
|
dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", |
|
mod_state_to_str(sfp->sm_mod_state), |
|
dev_state_to_str(sfp->sm_dev_state), |
|
sm_state_to_str(sfp->sm_state)); |
|
|
|
mutex_unlock(&sfp->sm_mutex); |
|
} |
|
|
|
static void sfp_attach(struct sfp *sfp) |
|
{ |
|
sfp_sm_event(sfp, SFP_E_DEV_ATTACH); |
|
} |
|
|
|
static void sfp_detach(struct sfp *sfp) |
|
{ |
|
sfp_sm_event(sfp, SFP_E_DEV_DETACH); |
|
} |
|
|
|
static void sfp_start(struct sfp *sfp) |
|
{ |
|
sfp_sm_event(sfp, SFP_E_DEV_UP); |
|
} |
|
|
|
static void sfp_stop(struct sfp *sfp) |
|
{ |
|
sfp_sm_event(sfp, SFP_E_DEV_DOWN); |
|
} |
|
|
|
static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) |
|
{ |
|
/* locking... and check module is present */ |
|
|
|
if (sfp->id.ext.sff8472_compliance && |
|
!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { |
|
modinfo->type = ETH_MODULE_SFF_8472; |
|
modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; |
|
} else { |
|
modinfo->type = ETH_MODULE_SFF_8079; |
|
modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; |
|
} |
|
return 0; |
|
} |
|
|
|
static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, |
|
u8 *data) |
|
{ |
|
unsigned int first, last, len; |
|
int ret; |
|
|
|
if (ee->len == 0) |
|
return -EINVAL; |
|
|
|
first = ee->offset; |
|
last = ee->offset + ee->len; |
|
if (first < ETH_MODULE_SFF_8079_LEN) { |
|
len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); |
|
len -= first; |
|
|
|
ret = sfp_read(sfp, false, first, data, len); |
|
if (ret < 0) |
|
return ret; |
|
|
|
first += len; |
|
data += len; |
|
} |
|
if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { |
|
len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); |
|
len -= first; |
|
first -= ETH_MODULE_SFF_8079_LEN; |
|
|
|
ret = sfp_read(sfp, true, first, data, len); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
return 0; |
|
} |
|
|
|
static int sfp_module_eeprom_by_page(struct sfp *sfp, |
|
const struct ethtool_module_eeprom *page, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
if (page->bank) { |
|
NL_SET_ERR_MSG(extack, "Banks not supported"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (page->page) { |
|
NL_SET_ERR_MSG(extack, "Only page 0 supported"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (page->i2c_address != 0x50 && |
|
page->i2c_address != 0x51) { |
|
NL_SET_ERR_MSG(extack, "Only address 0x50 and 0x51 supported"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
return sfp_read(sfp, page->i2c_address == 0x51, page->offset, |
|
page->data, page->length); |
|
}; |
|
|
|
static const struct sfp_socket_ops sfp_module_ops = { |
|
.attach = sfp_attach, |
|
.detach = sfp_detach, |
|
.start = sfp_start, |
|
.stop = sfp_stop, |
|
.module_info = sfp_module_info, |
|
.module_eeprom = sfp_module_eeprom, |
|
.module_eeprom_by_page = sfp_module_eeprom_by_page, |
|
}; |
|
|
|
static void sfp_timeout(struct work_struct *work) |
|
{ |
|
struct sfp *sfp = container_of(work, struct sfp, timeout.work); |
|
|
|
rtnl_lock(); |
|
sfp_sm_event(sfp, SFP_E_TIMEOUT); |
|
rtnl_unlock(); |
|
} |
|
|
|
static void sfp_check_state(struct sfp *sfp) |
|
{ |
|
unsigned int state, i, changed; |
|
|
|
mutex_lock(&sfp->st_mutex); |
|
state = sfp_get_state(sfp); |
|
changed = state ^ sfp->state; |
|
changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; |
|
|
|
for (i = 0; i < GPIO_MAX; i++) |
|
if (changed & BIT(i)) |
|
dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], |
|
!!(sfp->state & BIT(i)), !!(state & BIT(i))); |
|
|
|
state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); |
|
sfp->state = state; |
|
|
|
rtnl_lock(); |
|
if (changed & SFP_F_PRESENT) |
|
sfp_sm_event(sfp, state & SFP_F_PRESENT ? |
|
SFP_E_INSERT : SFP_E_REMOVE); |
|
|
|
if (changed & SFP_F_TX_FAULT) |
|
sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? |
|
SFP_E_TX_FAULT : SFP_E_TX_CLEAR); |
|
|
|
if (changed & SFP_F_LOS) |
|
sfp_sm_event(sfp, state & SFP_F_LOS ? |
|
SFP_E_LOS_HIGH : SFP_E_LOS_LOW); |
|
rtnl_unlock(); |
|
mutex_unlock(&sfp->st_mutex); |
|
} |
|
|
|
static irqreturn_t sfp_irq(int irq, void *data) |
|
{ |
|
struct sfp *sfp = data; |
|
|
|
sfp_check_state(sfp); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static void sfp_poll(struct work_struct *work) |
|
{ |
|
struct sfp *sfp = container_of(work, struct sfp, poll.work); |
|
|
|
sfp_check_state(sfp); |
|
|
|
if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || |
|
sfp->need_poll) |
|
mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); |
|
} |
|
|
|
static struct sfp *sfp_alloc(struct device *dev) |
|
{ |
|
struct sfp *sfp; |
|
|
|
sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); |
|
if (!sfp) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
sfp->dev = dev; |
|
|
|
mutex_init(&sfp->sm_mutex); |
|
mutex_init(&sfp->st_mutex); |
|
INIT_DELAYED_WORK(&sfp->poll, sfp_poll); |
|
INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); |
|
|
|
sfp_hwmon_init(sfp); |
|
|
|
return sfp; |
|
} |
|
|
|
static void sfp_cleanup(void *data) |
|
{ |
|
struct sfp *sfp = data; |
|
|
|
sfp_hwmon_exit(sfp); |
|
|
|
cancel_delayed_work_sync(&sfp->poll); |
|
cancel_delayed_work_sync(&sfp->timeout); |
|
if (sfp->i2c_mii) { |
|
mdiobus_unregister(sfp->i2c_mii); |
|
mdiobus_free(sfp->i2c_mii); |
|
} |
|
if (sfp->i2c) |
|
i2c_put_adapter(sfp->i2c); |
|
kfree(sfp); |
|
} |
|
|
|
static int sfp_probe(struct platform_device *pdev) |
|
{ |
|
const struct sff_data *sff; |
|
struct i2c_adapter *i2c; |
|
char *sfp_irq_name; |
|
struct sfp *sfp; |
|
int err, i; |
|
|
|
sfp = sfp_alloc(&pdev->dev); |
|
if (IS_ERR(sfp)) |
|
return PTR_ERR(sfp); |
|
|
|
platform_set_drvdata(pdev, sfp); |
|
|
|
err = devm_add_action(sfp->dev, sfp_cleanup, sfp); |
|
if (err < 0) |
|
return err; |
|
|
|
sff = sfp->type = &sfp_data; |
|
|
|
if (pdev->dev.of_node) { |
|
struct device_node *node = pdev->dev.of_node; |
|
const struct of_device_id *id; |
|
struct device_node *np; |
|
|
|
id = of_match_node(sfp_of_match, node); |
|
if (WARN_ON(!id)) |
|
return -EINVAL; |
|
|
|
sff = sfp->type = id->data; |
|
|
|
np = of_parse_phandle(node, "i2c-bus", 0); |
|
if (!np) { |
|
dev_err(sfp->dev, "missing 'i2c-bus' property\n"); |
|
return -ENODEV; |
|
} |
|
|
|
i2c = of_find_i2c_adapter_by_node(np); |
|
of_node_put(np); |
|
} else if (has_acpi_companion(&pdev->dev)) { |
|
struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); |
|
struct fwnode_handle *fw = acpi_fwnode_handle(adev); |
|
struct fwnode_reference_args args; |
|
struct acpi_handle *acpi_handle; |
|
int ret; |
|
|
|
ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); |
|
if (ret || !is_acpi_device_node(args.fwnode)) { |
|
dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); |
|
return -ENODEV; |
|
} |
|
|
|
acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); |
|
i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); |
|
} else { |
|
return -EINVAL; |
|
} |
|
|
|
if (!i2c) |
|
return -EPROBE_DEFER; |
|
|
|
err = sfp_i2c_configure(sfp, i2c); |
|
if (err < 0) { |
|
i2c_put_adapter(i2c); |
|
return err; |
|
} |
|
|
|
for (i = 0; i < GPIO_MAX; i++) |
|
if (sff->gpios & BIT(i)) { |
|
sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, |
|
gpio_of_names[i], gpio_flags[i]); |
|
if (IS_ERR(sfp->gpio[i])) |
|
return PTR_ERR(sfp->gpio[i]); |
|
} |
|
|
|
sfp->get_state = sfp_gpio_get_state; |
|
sfp->set_state = sfp_gpio_set_state; |
|
|
|
/* Modules that have no detect signal are always present */ |
|
if (!(sfp->gpio[GPIO_MODDEF0])) |
|
sfp->get_state = sff_gpio_get_state; |
|
|
|
device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", |
|
&sfp->max_power_mW); |
|
if (!sfp->max_power_mW) |
|
sfp->max_power_mW = 1000; |
|
|
|
dev_info(sfp->dev, "Host maximum power %u.%uW\n", |
|
sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); |
|
|
|
/* Get the initial state, and always signal TX disable, |
|
* since the network interface will not be up. |
|
*/ |
|
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; |
|
sfp_set_state(sfp, sfp->state); |
|
sfp_module_tx_disable(sfp); |
|
if (sfp->state & SFP_F_PRESENT) { |
|
rtnl_lock(); |
|
sfp_sm_event(sfp, SFP_E_INSERT); |
|
rtnl_unlock(); |
|
} |
|
|
|
for (i = 0; i < GPIO_MAX; i++) { |
|
if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) |
|
continue; |
|
|
|
sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); |
|
if (sfp->gpio_irq[i] < 0) { |
|
sfp->gpio_irq[i] = 0; |
|
sfp->need_poll = true; |
|
continue; |
|
} |
|
|
|
sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL, |
|
"%s-%s", dev_name(sfp->dev), |
|
gpio_of_names[i]); |
|
|
|
if (!sfp_irq_name) |
|
return -ENOMEM; |
|
|
|
err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], |
|
NULL, sfp_irq, |
|
IRQF_ONESHOT | |
|
IRQF_TRIGGER_RISING | |
|
IRQF_TRIGGER_FALLING, |
|
sfp_irq_name, sfp); |
|
if (err) { |
|
sfp->gpio_irq[i] = 0; |
|
sfp->need_poll = true; |
|
} |
|
} |
|
|
|
if (sfp->need_poll) |
|
mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); |
|
|
|
/* We could have an issue in cases no Tx disable pin is available or |
|
* wired as modules using a laser as their light source will continue to |
|
* be active when the fiber is removed. This could be a safety issue and |
|
* we should at least warn the user about that. |
|
*/ |
|
if (!sfp->gpio[GPIO_TX_DISABLE]) |
|
dev_warn(sfp->dev, |
|
"No tx_disable pin: SFP modules will always be emitting.\n"); |
|
|
|
sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); |
|
if (!sfp->sfp_bus) |
|
return -ENOMEM; |
|
|
|
sfp_debugfs_init(sfp); |
|
|
|
return 0; |
|
} |
|
|
|
static int sfp_remove(struct platform_device *pdev) |
|
{ |
|
struct sfp *sfp = platform_get_drvdata(pdev); |
|
|
|
sfp_debugfs_exit(sfp); |
|
sfp_unregister_socket(sfp->sfp_bus); |
|
|
|
rtnl_lock(); |
|
sfp_sm_event(sfp, SFP_E_REMOVE); |
|
rtnl_unlock(); |
|
|
|
return 0; |
|
} |
|
|
|
static void sfp_shutdown(struct platform_device *pdev) |
|
{ |
|
struct sfp *sfp = platform_get_drvdata(pdev); |
|
int i; |
|
|
|
for (i = 0; i < GPIO_MAX; i++) { |
|
if (!sfp->gpio_irq[i]) |
|
continue; |
|
|
|
devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); |
|
} |
|
|
|
cancel_delayed_work_sync(&sfp->poll); |
|
cancel_delayed_work_sync(&sfp->timeout); |
|
} |
|
|
|
static struct platform_driver sfp_driver = { |
|
.probe = sfp_probe, |
|
.remove = sfp_remove, |
|
.shutdown = sfp_shutdown, |
|
.driver = { |
|
.name = "sfp", |
|
.of_match_table = sfp_of_match, |
|
}, |
|
}; |
|
|
|
static int sfp_init(void) |
|
{ |
|
poll_jiffies = msecs_to_jiffies(100); |
|
|
|
return platform_driver_register(&sfp_driver); |
|
} |
|
module_init(sfp_init); |
|
|
|
static void sfp_exit(void) |
|
{ |
|
platform_driver_unregister(&sfp_driver); |
|
} |
|
module_exit(sfp_exit); |
|
|
|
MODULE_ALIAS("platform:sfp"); |
|
MODULE_AUTHOR("Russell King"); |
|
MODULE_LICENSE("GPL v2");
|
|
|