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![Wenpeng Liang](/assets/img/avatar_default.png)
There are some repeated words in some comments, they should be deleted. Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com> Signed-off-by: Weihang Li <liweihang@huawei.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2679 lines
64 KiB
C
2679 lines
64 KiB
C
// 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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#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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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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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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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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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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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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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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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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/* 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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/* 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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/* 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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/* 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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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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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);
|
|
/* Preserve the current state */
|
|
state = sfp->state;
|
|
}
|
|
|
|
return state & sfp->state_soft_mask;
|
|
}
|
|
|
|
static void sfp_soft_set_state(struct sfp *sfp, unsigned int state)
|
|
{
|
|
u8 status;
|
|
|
|
if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) ==
|
|
sizeof(status)) {
|
|
if (state & SFP_F_TX_DISABLE)
|
|
status |= SFP_STATUS_TX_DISABLE_FORCE;
|
|
else
|
|
status &= ~SFP_STATUS_TX_DISABLE_FORCE;
|
|
|
|
sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status));
|
|
}
|
|
}
|
|
|
|
static void sfp_soft_start_poll(struct sfp *sfp)
|
|
{
|
|
const struct sfp_eeprom_id *id = &sfp->id;
|
|
|
|
sfp->state_soft_mask = 0;
|
|
if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE &&
|
|
!sfp->gpio[GPIO_TX_DISABLE])
|
|
sfp->state_soft_mask |= SFP_F_TX_DISABLE;
|
|
if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT &&
|
|
!sfp->gpio[GPIO_TX_FAULT])
|
|
sfp->state_soft_mask |= SFP_F_TX_FAULT;
|
|
if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS &&
|
|
!sfp->gpio[GPIO_LOS])
|
|
sfp->state_soft_mask |= SFP_F_LOS;
|
|
|
|
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 void sfp_soft_stop_poll(struct sfp *sfp)
|
|
{
|
|
sfp->state_soft_mask = 0;
|
|
}
|
|
|
|
static unsigned int sfp_get_state(struct sfp *sfp)
|
|
{
|
|
unsigned int state = sfp->get_state(sfp);
|
|
|
|
if (state & SFP_F_PRESENT &&
|
|
sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT))
|
|
state |= sfp_soft_get_state(sfp);
|
|
|
|
return state;
|
|
}
|
|
|
|
static void sfp_set_state(struct sfp *sfp, unsigned int state)
|
|
{
|
|
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");
|