1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/acpi.h>
3 #include <linux/ctype.h>
4 #include <linux/delay.h>
5 #include <linux/gpio/consumer.h>
6 #include <linux/hwmon.h>
8 #include <linux/interrupt.h>
9 #include <linux/jiffies.h>
10 #include <linux/mdio/mdio-i2c.h>
11 #include <linux/module.h>
12 #include <linux/mutex.h>
14 #include <linux/phy.h>
15 #include <linux/platform_device.h>
16 #include <linux/rtnetlink.h>
17 #include <linux/slab.h>
18 #include <linux/workqueue.h>
31 SFP_F_PRESENT = BIT(GPIO_MODDEF0),
32 SFP_F_LOS = BIT(GPIO_LOS),
33 SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT),
34 SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE),
35 SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT),
74 static const char * const mod_state_strings[] = {
75 [SFP_MOD_EMPTY] = "empty",
76 [SFP_MOD_ERROR] = "error",
77 [SFP_MOD_PROBE] = "probe",
78 [SFP_MOD_WAITDEV] = "waitdev",
79 [SFP_MOD_HPOWER] = "hpower",
80 [SFP_MOD_WAITPWR] = "waitpwr",
81 [SFP_MOD_PRESENT] = "present",
84 static const char *mod_state_to_str(unsigned short mod_state)
86 if (mod_state >= ARRAY_SIZE(mod_state_strings))
87 return "Unknown module state";
88 return mod_state_strings[mod_state];
91 static const char * const dev_state_strings[] = {
92 [SFP_DEV_DETACHED] = "detached",
93 [SFP_DEV_DOWN] = "down",
97 static const char *dev_state_to_str(unsigned short dev_state)
99 if (dev_state >= ARRAY_SIZE(dev_state_strings))
100 return "Unknown device state";
101 return dev_state_strings[dev_state];
104 static const char * const event_strings[] = {
105 [SFP_E_INSERT] = "insert",
106 [SFP_E_REMOVE] = "remove",
107 [SFP_E_DEV_ATTACH] = "dev_attach",
108 [SFP_E_DEV_DETACH] = "dev_detach",
109 [SFP_E_DEV_DOWN] = "dev_down",
110 [SFP_E_DEV_UP] = "dev_up",
111 [SFP_E_TX_FAULT] = "tx_fault",
112 [SFP_E_TX_CLEAR] = "tx_clear",
113 [SFP_E_LOS_HIGH] = "los_high",
114 [SFP_E_LOS_LOW] = "los_low",
115 [SFP_E_TIMEOUT] = "timeout",
118 static const char *event_to_str(unsigned short event)
120 if (event >= ARRAY_SIZE(event_strings))
121 return "Unknown event";
122 return event_strings[event];
125 static const char * const sm_state_strings[] = {
126 [SFP_S_DOWN] = "down",
127 [SFP_S_FAIL] = "fail",
128 [SFP_S_WAIT] = "wait",
129 [SFP_S_INIT] = "init",
130 [SFP_S_INIT_PHY] = "init_phy",
131 [SFP_S_INIT_TX_FAULT] = "init_tx_fault",
132 [SFP_S_WAIT_LOS] = "wait_los",
133 [SFP_S_LINK_UP] = "link_up",
134 [SFP_S_TX_FAULT] = "tx_fault",
135 [SFP_S_REINIT] = "reinit",
136 [SFP_S_TX_DISABLE] = "tx_disable",
139 static const char *sm_state_to_str(unsigned short sm_state)
141 if (sm_state >= ARRAY_SIZE(sm_state_strings))
142 return "Unknown state";
143 return sm_state_strings[sm_state];
146 static const char *gpio_of_names[] = {
154 static const enum gpiod_flags gpio_flags[] = {
162 /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a
163 * non-cooled module to initialise its laser safety circuitry. We wait
164 * an initial T_WAIT period before we check the tx fault to give any PHY
165 * on board (for a copper SFP) time to initialise.
167 #define T_WAIT msecs_to_jiffies(50)
168 #define T_START_UP msecs_to_jiffies(300)
169 #define T_START_UP_BAD_GPON msecs_to_jiffies(60000)
171 /* t_reset is the time required to assert the TX_DISABLE signal to reset
172 * an indicated TX_FAULT.
174 #define T_RESET_US 10
175 #define T_FAULT_RECOVER msecs_to_jiffies(1000)
177 /* N_FAULT_INIT is the number of recovery attempts at module initialisation
178 * time. If the TX_FAULT signal is not deasserted after this number of
179 * attempts at clearing it, we decide that the module is faulty.
180 * N_FAULT is the same but after the module has initialised.
182 #define N_FAULT_INIT 5
185 /* T_PHY_RETRY is the time interval between attempts to probe the PHY.
186 * R_PHY_RETRY is the number of attempts.
188 #define T_PHY_RETRY msecs_to_jiffies(50)
189 #define R_PHY_RETRY 12
191 /* SFP module presence detection is poor: the three MOD DEF signals are
192 * the same length on the PCB, which means it's possible for MOD DEF 0 to
193 * connect before the I2C bus on MOD DEF 1/2.
195 * The SFF-8472 specifies t_serial ("Time from power on until module is
196 * ready for data transmission over the two wire serial bus.") as 300ms.
198 #define T_SERIAL msecs_to_jiffies(300)
199 #define T_HPOWER_LEVEL msecs_to_jiffies(300)
200 #define T_PROBE_RETRY_INIT msecs_to_jiffies(100)
201 #define R_PROBE_RETRY_INIT 10
202 #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000)
203 #define R_PROBE_RETRY_SLOW 12
205 /* SFP modules appear to always have their PHY configured for bus address
206 * 0x56 (which with mdio-i2c, translates to a PHY address of 22).
208 #define SFP_PHY_ADDR 22
210 /* SFP_EEPROM_BLOCK_SIZE is the size of data chunk to read the EEPROM
211 * at a time. Some SFP modules and also some Linux I2C drivers do not like
212 * reads longer than 16 bytes.
214 #define SFP_EEPROM_BLOCK_SIZE 16
218 bool (*module_supported)(const struct sfp_eeprom_id *id);
223 struct i2c_adapter *i2c;
224 struct mii_bus *i2c_mii;
225 struct sfp_bus *sfp_bus;
226 struct phy_device *mod_phy;
227 const struct sff_data *type;
228 size_t i2c_block_size;
231 unsigned int (*get_state)(struct sfp *);
232 void (*set_state)(struct sfp *, unsigned int);
233 int (*read)(struct sfp *, bool, u8, void *, size_t);
234 int (*write)(struct sfp *, bool, u8, void *, size_t);
236 struct gpio_desc *gpio[GPIO_MAX];
237 int gpio_irq[GPIO_MAX];
241 struct mutex st_mutex; /* Protects state */
242 unsigned int state_soft_mask;
244 struct delayed_work poll;
245 struct delayed_work timeout;
246 struct mutex sm_mutex; /* Protects state machine */
247 unsigned char sm_mod_state;
248 unsigned char sm_mod_tries_init;
249 unsigned char sm_mod_tries;
250 unsigned char sm_dev_state;
251 unsigned short sm_state;
252 unsigned char sm_fault_retries;
253 unsigned char sm_phy_retries;
255 struct sfp_eeprom_id id;
256 unsigned int module_power_mW;
257 unsigned int module_t_start_up;
258 bool tx_fault_ignore;
260 #if IS_ENABLED(CONFIG_HWMON)
261 struct sfp_diag diag;
262 struct delayed_work hwmon_probe;
263 unsigned int hwmon_tries;
264 struct device *hwmon_dev;
270 static bool sff_module_supported(const struct sfp_eeprom_id *id)
272 return id->base.phys_id == SFF8024_ID_SFF_8472 &&
273 id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP;
276 static const struct sff_data sff_data = {
277 .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE,
278 .module_supported = sff_module_supported,
281 static bool sfp_module_supported(const struct sfp_eeprom_id *id)
283 if (id->base.phys_id == SFF8024_ID_SFP &&
284 id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP)
287 /* SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored
288 * phys id SFF instead of SFP. Therefore mark this module explicitly
289 * as supported based on vendor name and pn match.
291 if (id->base.phys_id == SFF8024_ID_SFF_8472 &&
292 id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP &&
293 !memcmp(id->base.vendor_name, "UBNT ", 16) &&
294 !memcmp(id->base.vendor_pn, "UF-INSTANT ", 16))
300 static const struct sff_data sfp_data = {
301 .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT |
302 SFP_F_TX_DISABLE | SFP_F_RATE_SELECT,
303 .module_supported = sfp_module_supported,
306 static const struct of_device_id sfp_of_match[] = {
307 { .compatible = "sff,sff", .data = &sff_data, },
308 { .compatible = "sff,sfp", .data = &sfp_data, },
311 MODULE_DEVICE_TABLE(of, sfp_of_match);
313 static unsigned long poll_jiffies;
315 static unsigned int sfp_gpio_get_state(struct sfp *sfp)
317 unsigned int i, state, v;
319 for (i = state = 0; i < GPIO_MAX; i++) {
320 if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i])
323 v = gpiod_get_value_cansleep(sfp->gpio[i]);
331 static unsigned int sff_gpio_get_state(struct sfp *sfp)
333 return sfp_gpio_get_state(sfp) | SFP_F_PRESENT;
336 static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state)
338 if (state & SFP_F_PRESENT) {
339 /* If the module is present, drive the signals */
340 if (sfp->gpio[GPIO_TX_DISABLE])
341 gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE],
342 state & SFP_F_TX_DISABLE);
343 if (state & SFP_F_RATE_SELECT)
344 gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT],
345 state & SFP_F_RATE_SELECT);
347 /* Otherwise, let them float to the pull-ups */
348 if (sfp->gpio[GPIO_TX_DISABLE])
349 gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]);
350 if (state & SFP_F_RATE_SELECT)
351 gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]);
355 static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf,
358 struct i2c_msg msgs[2];
359 u8 bus_addr = a2 ? 0x51 : 0x50;
360 size_t block_size = sfp->i2c_block_size;
364 msgs[0].addr = bus_addr;
367 msgs[0].buf = &dev_addr;
368 msgs[1].addr = bus_addr;
369 msgs[1].flags = I2C_M_RD;
375 if (this_len > block_size)
376 this_len = block_size;
378 msgs[1].len = this_len;
380 ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs));
384 if (ret != ARRAY_SIZE(msgs))
387 msgs[1].buf += this_len;
388 dev_addr += this_len;
392 return msgs[1].buf - (u8 *)buf;
395 static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf,
398 struct i2c_msg msgs[1];
399 u8 bus_addr = a2 ? 0x51 : 0x50;
402 msgs[0].addr = bus_addr;
404 msgs[0].len = 1 + len;
405 msgs[0].buf = kmalloc(1 + len, GFP_KERNEL);
409 msgs[0].buf[0] = dev_addr;
410 memcpy(&msgs[0].buf[1], buf, len);
412 ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs));
419 return ret == ARRAY_SIZE(msgs) ? len : 0;
422 static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c)
424 struct mii_bus *i2c_mii;
427 if (!i2c_check_functionality(i2c, I2C_FUNC_I2C))
431 sfp->read = sfp_i2c_read;
432 sfp->write = sfp_i2c_write;
434 i2c_mii = mdio_i2c_alloc(sfp->dev, i2c);
436 return PTR_ERR(i2c_mii);
438 i2c_mii->name = "SFP I2C Bus";
439 i2c_mii->phy_mask = ~0;
441 ret = mdiobus_register(i2c_mii);
443 mdiobus_free(i2c_mii);
447 sfp->i2c_mii = i2c_mii;
453 static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len)
455 return sfp->read(sfp, a2, addr, buf, len);
458 static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len)
460 return sfp->write(sfp, a2, addr, buf, len);
463 static unsigned int sfp_soft_get_state(struct sfp *sfp)
465 unsigned int state = 0;
469 ret = sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status));
470 if (ret == sizeof(status)) {
471 if (status & SFP_STATUS_RX_LOS)
473 if (status & SFP_STATUS_TX_FAULT)
474 state |= SFP_F_TX_FAULT;
476 dev_err_ratelimited(sfp->dev,
477 "failed to read SFP soft status: %d\n",
479 /* Preserve the current state */
483 return state & sfp->state_soft_mask;
486 static void sfp_soft_set_state(struct sfp *sfp, unsigned int state)
490 if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) ==
492 if (state & SFP_F_TX_DISABLE)
493 status |= SFP_STATUS_TX_DISABLE_FORCE;
495 status &= ~SFP_STATUS_TX_DISABLE_FORCE;
497 sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status));
501 static void sfp_soft_start_poll(struct sfp *sfp)
503 const struct sfp_eeprom_id *id = &sfp->id;
505 sfp->state_soft_mask = 0;
506 if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE &&
507 !sfp->gpio[GPIO_TX_DISABLE])
508 sfp->state_soft_mask |= SFP_F_TX_DISABLE;
509 if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT &&
510 !sfp->gpio[GPIO_TX_FAULT])
511 sfp->state_soft_mask |= SFP_F_TX_FAULT;
512 if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS &&
513 !sfp->gpio[GPIO_LOS])
514 sfp->state_soft_mask |= SFP_F_LOS;
516 if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) &&
518 mod_delayed_work(system_wq, &sfp->poll, poll_jiffies);
521 static void sfp_soft_stop_poll(struct sfp *sfp)
523 sfp->state_soft_mask = 0;
526 static unsigned int sfp_get_state(struct sfp *sfp)
528 unsigned int state = sfp->get_state(sfp);
530 if (state & SFP_F_PRESENT &&
531 sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT))
532 state |= sfp_soft_get_state(sfp);
537 static void sfp_set_state(struct sfp *sfp, unsigned int state)
539 sfp->set_state(sfp, state);
541 if (state & SFP_F_PRESENT &&
542 sfp->state_soft_mask & SFP_F_TX_DISABLE)
543 sfp_soft_set_state(sfp, state);
546 static unsigned int sfp_check(void *buf, size_t len)
550 for (p = buf, check = 0; len; p++, len--)
557 #if IS_ENABLED(CONFIG_HWMON)
558 static umode_t sfp_hwmon_is_visible(const void *data,
559 enum hwmon_sensor_types type,
560 u32 attr, int channel)
562 const struct sfp *sfp = data;
567 case hwmon_temp_min_alarm:
568 case hwmon_temp_max_alarm:
569 case hwmon_temp_lcrit_alarm:
570 case hwmon_temp_crit_alarm:
573 case hwmon_temp_lcrit:
574 case hwmon_temp_crit:
575 if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN))
578 case hwmon_temp_input:
579 case hwmon_temp_label:
586 case hwmon_in_min_alarm:
587 case hwmon_in_max_alarm:
588 case hwmon_in_lcrit_alarm:
589 case hwmon_in_crit_alarm:
594 if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN))
605 case hwmon_curr_min_alarm:
606 case hwmon_curr_max_alarm:
607 case hwmon_curr_lcrit_alarm:
608 case hwmon_curr_crit_alarm:
611 case hwmon_curr_lcrit:
612 case hwmon_curr_crit:
613 if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN))
616 case hwmon_curr_input:
617 case hwmon_curr_label:
623 /* External calibration of receive power requires
624 * floating point arithmetic. Doing that in the kernel
625 * is not easy, so just skip it. If the module does
626 * not require external calibration, we can however
627 * show receiver power, since FP is then not needed.
629 if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL &&
633 case hwmon_power_min_alarm:
634 case hwmon_power_max_alarm:
635 case hwmon_power_lcrit_alarm:
636 case hwmon_power_crit_alarm:
637 case hwmon_power_min:
638 case hwmon_power_max:
639 case hwmon_power_lcrit:
640 case hwmon_power_crit:
641 if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN))
644 case hwmon_power_input:
645 case hwmon_power_label:
655 static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value)
660 err = sfp_read(sfp, true, reg, &val, sizeof(val));
664 *value = be16_to_cpu(val);
669 static void sfp_hwmon_to_rx_power(long *value)
671 *value = DIV_ROUND_CLOSEST(*value, 10);
674 static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset,
677 if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL)
678 *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset;
681 static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value)
683 sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope),
684 be16_to_cpu(sfp->diag.cal_t_offset), value);
686 if (*value >= 0x8000)
689 *value = DIV_ROUND_CLOSEST(*value * 1000, 256);
692 static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value)
694 sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope),
695 be16_to_cpu(sfp->diag.cal_v_offset), value);
697 *value = DIV_ROUND_CLOSEST(*value, 10);
700 static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value)
702 sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope),
703 be16_to_cpu(sfp->diag.cal_txi_offset), value);
705 *value = DIV_ROUND_CLOSEST(*value, 500);
708 static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value)
710 sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope),
711 be16_to_cpu(sfp->diag.cal_txpwr_offset), value);
713 *value = DIV_ROUND_CLOSEST(*value, 10);
716 static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value)
720 err = sfp_hwmon_read_sensor(sfp, reg, value);
724 sfp_hwmon_calibrate_temp(sfp, value);
729 static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value)
733 err = sfp_hwmon_read_sensor(sfp, reg, value);
737 sfp_hwmon_calibrate_vcc(sfp, value);
742 static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value)
746 err = sfp_hwmon_read_sensor(sfp, reg, value);
750 sfp_hwmon_calibrate_bias(sfp, value);
755 static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value)
759 err = sfp_hwmon_read_sensor(sfp, reg, value);
763 sfp_hwmon_calibrate_tx_power(sfp, value);
768 static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value)
772 err = sfp_hwmon_read_sensor(sfp, reg, value);
776 sfp_hwmon_to_rx_power(value);
781 static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value)
787 case hwmon_temp_input:
788 return sfp_hwmon_read_temp(sfp, SFP_TEMP, value);
790 case hwmon_temp_lcrit:
791 *value = be16_to_cpu(sfp->diag.temp_low_alarm);
792 sfp_hwmon_calibrate_temp(sfp, value);
796 *value = be16_to_cpu(sfp->diag.temp_low_warn);
797 sfp_hwmon_calibrate_temp(sfp, value);
800 *value = be16_to_cpu(sfp->diag.temp_high_warn);
801 sfp_hwmon_calibrate_temp(sfp, value);
804 case hwmon_temp_crit:
805 *value = be16_to_cpu(sfp->diag.temp_high_alarm);
806 sfp_hwmon_calibrate_temp(sfp, value);
809 case hwmon_temp_lcrit_alarm:
810 err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status));
814 *value = !!(status & SFP_ALARM0_TEMP_LOW);
817 case hwmon_temp_min_alarm:
818 err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status));
822 *value = !!(status & SFP_WARN0_TEMP_LOW);
825 case hwmon_temp_max_alarm:
826 err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status));
830 *value = !!(status & SFP_WARN0_TEMP_HIGH);
833 case hwmon_temp_crit_alarm:
834 err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status));
838 *value = !!(status & SFP_ALARM0_TEMP_HIGH);
847 static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value)
854 return sfp_hwmon_read_vcc(sfp, SFP_VCC, value);
857 *value = be16_to_cpu(sfp->diag.volt_low_alarm);
858 sfp_hwmon_calibrate_vcc(sfp, value);
862 *value = be16_to_cpu(sfp->diag.volt_low_warn);
863 sfp_hwmon_calibrate_vcc(sfp, value);
867 *value = be16_to_cpu(sfp->diag.volt_high_warn);
868 sfp_hwmon_calibrate_vcc(sfp, value);
872 *value = be16_to_cpu(sfp->diag.volt_high_alarm);
873 sfp_hwmon_calibrate_vcc(sfp, value);
876 case hwmon_in_lcrit_alarm:
877 err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status));
881 *value = !!(status & SFP_ALARM0_VCC_LOW);
884 case hwmon_in_min_alarm:
885 err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status));
889 *value = !!(status & SFP_WARN0_VCC_LOW);
892 case hwmon_in_max_alarm:
893 err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status));
897 *value = !!(status & SFP_WARN0_VCC_HIGH);
900 case hwmon_in_crit_alarm:
901 err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status));
905 *value = !!(status & SFP_ALARM0_VCC_HIGH);
914 static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value)
920 case hwmon_curr_input:
921 return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value);
923 case hwmon_curr_lcrit:
924 *value = be16_to_cpu(sfp->diag.bias_low_alarm);
925 sfp_hwmon_calibrate_bias(sfp, value);
929 *value = be16_to_cpu(sfp->diag.bias_low_warn);
930 sfp_hwmon_calibrate_bias(sfp, value);
934 *value = be16_to_cpu(sfp->diag.bias_high_warn);
935 sfp_hwmon_calibrate_bias(sfp, value);
938 case hwmon_curr_crit:
939 *value = be16_to_cpu(sfp->diag.bias_high_alarm);
940 sfp_hwmon_calibrate_bias(sfp, value);
943 case hwmon_curr_lcrit_alarm:
944 err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status));
948 *value = !!(status & SFP_ALARM0_TX_BIAS_LOW);
951 case hwmon_curr_min_alarm:
952 err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status));
956 *value = !!(status & SFP_WARN0_TX_BIAS_LOW);
959 case hwmon_curr_max_alarm:
960 err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status));
964 *value = !!(status & SFP_WARN0_TX_BIAS_HIGH);
967 case hwmon_curr_crit_alarm:
968 err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status));
972 *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH);
981 static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value)
987 case hwmon_power_input:
988 return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value);
990 case hwmon_power_lcrit:
991 *value = be16_to_cpu(sfp->diag.txpwr_low_alarm);
992 sfp_hwmon_calibrate_tx_power(sfp, value);
995 case hwmon_power_min:
996 *value = be16_to_cpu(sfp->diag.txpwr_low_warn);
997 sfp_hwmon_calibrate_tx_power(sfp, value);
1000 case hwmon_power_max:
1001 *value = be16_to_cpu(sfp->diag.txpwr_high_warn);
1002 sfp_hwmon_calibrate_tx_power(sfp, value);
1005 case hwmon_power_crit:
1006 *value = be16_to_cpu(sfp->diag.txpwr_high_alarm);
1007 sfp_hwmon_calibrate_tx_power(sfp, value);
1010 case hwmon_power_lcrit_alarm:
1011 err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status));
1015 *value = !!(status & SFP_ALARM0_TXPWR_LOW);
1018 case hwmon_power_min_alarm:
1019 err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status));
1023 *value = !!(status & SFP_WARN0_TXPWR_LOW);
1026 case hwmon_power_max_alarm:
1027 err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status));
1031 *value = !!(status & SFP_WARN0_TXPWR_HIGH);
1034 case hwmon_power_crit_alarm:
1035 err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status));
1039 *value = !!(status & SFP_ALARM0_TXPWR_HIGH);
1048 static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value)
1054 case hwmon_power_input:
1055 return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value);
1057 case hwmon_power_lcrit:
1058 *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm);
1059 sfp_hwmon_to_rx_power(value);
1062 case hwmon_power_min:
1063 *value = be16_to_cpu(sfp->diag.rxpwr_low_warn);
1064 sfp_hwmon_to_rx_power(value);
1067 case hwmon_power_max:
1068 *value = be16_to_cpu(sfp->diag.rxpwr_high_warn);
1069 sfp_hwmon_to_rx_power(value);
1072 case hwmon_power_crit:
1073 *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm);
1074 sfp_hwmon_to_rx_power(value);
1077 case hwmon_power_lcrit_alarm:
1078 err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status));
1082 *value = !!(status & SFP_ALARM1_RXPWR_LOW);
1085 case hwmon_power_min_alarm:
1086 err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status));
1090 *value = !!(status & SFP_WARN1_RXPWR_LOW);
1093 case hwmon_power_max_alarm:
1094 err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status));
1098 *value = !!(status & SFP_WARN1_RXPWR_HIGH);
1101 case hwmon_power_crit_alarm:
1102 err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status));
1106 *value = !!(status & SFP_ALARM1_RXPWR_HIGH);
1115 static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
1116 u32 attr, int channel, long *value)
1118 struct sfp *sfp = dev_get_drvdata(dev);
1122 return sfp_hwmon_temp(sfp, attr, value);
1124 return sfp_hwmon_vcc(sfp, attr, value);
1126 return sfp_hwmon_bias(sfp, attr, value);
1130 return sfp_hwmon_tx_power(sfp, attr, value);
1132 return sfp_hwmon_rx_power(sfp, attr, value);
1141 static const char *const sfp_hwmon_power_labels[] = {
1146 static int sfp_hwmon_read_string(struct device *dev,
1147 enum hwmon_sensor_types type,
1148 u32 attr, int channel, const char **str)
1153 case hwmon_curr_label:
1162 case hwmon_temp_label:
1163 *str = "temperature";
1171 case hwmon_in_label:
1180 case hwmon_power_label:
1181 *str = sfp_hwmon_power_labels[channel];
1194 static const struct hwmon_ops sfp_hwmon_ops = {
1195 .is_visible = sfp_hwmon_is_visible,
1196 .read = sfp_hwmon_read,
1197 .read_string = sfp_hwmon_read_string,
1200 static u32 sfp_hwmon_chip_config[] = {
1201 HWMON_C_REGISTER_TZ,
1205 static const struct hwmon_channel_info sfp_hwmon_chip = {
1207 .config = sfp_hwmon_chip_config,
1210 static u32 sfp_hwmon_temp_config[] = {
1212 HWMON_T_MAX | HWMON_T_MIN |
1213 HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM |
1214 HWMON_T_CRIT | HWMON_T_LCRIT |
1215 HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM |
1220 static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = {
1222 .config = sfp_hwmon_temp_config,
1225 static u32 sfp_hwmon_vcc_config[] = {
1227 HWMON_I_MAX | HWMON_I_MIN |
1228 HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM |
1229 HWMON_I_CRIT | HWMON_I_LCRIT |
1230 HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM |
1235 static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = {
1237 .config = sfp_hwmon_vcc_config,
1240 static u32 sfp_hwmon_bias_config[] = {
1242 HWMON_C_MAX | HWMON_C_MIN |
1243 HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM |
1244 HWMON_C_CRIT | HWMON_C_LCRIT |
1245 HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM |
1250 static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = {
1252 .config = sfp_hwmon_bias_config,
1255 static u32 sfp_hwmon_power_config[] = {
1256 /* Transmit power */
1258 HWMON_P_MAX | HWMON_P_MIN |
1259 HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM |
1260 HWMON_P_CRIT | HWMON_P_LCRIT |
1261 HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM |
1265 HWMON_P_MAX | HWMON_P_MIN |
1266 HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM |
1267 HWMON_P_CRIT | HWMON_P_LCRIT |
1268 HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM |
1273 static const struct hwmon_channel_info sfp_hwmon_power_channel_info = {
1274 .type = hwmon_power,
1275 .config = sfp_hwmon_power_config,
1278 static const struct hwmon_channel_info *sfp_hwmon_info[] = {
1280 &sfp_hwmon_vcc_channel_info,
1281 &sfp_hwmon_temp_channel_info,
1282 &sfp_hwmon_bias_channel_info,
1283 &sfp_hwmon_power_channel_info,
1287 static const struct hwmon_chip_info sfp_hwmon_chip_info = {
1288 .ops = &sfp_hwmon_ops,
1289 .info = sfp_hwmon_info,
1292 static void sfp_hwmon_probe(struct work_struct *work)
1294 struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work);
1297 /* hwmon interface needs to access 16bit registers in atomic way to
1298 * guarantee coherency of the diagnostic monitoring data. If it is not
1299 * possible to guarantee coherency because EEPROM is broken in such way
1300 * that does not support atomic 16bit read operation then we have to
1301 * skip registration of hwmon device.
1303 if (sfp->i2c_block_size < 2) {
1305 "skipping hwmon device registration due to broken EEPROM\n");
1307 "diagnostic EEPROM area cannot be read atomically to guarantee data coherency\n");
1311 err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag));
1313 if (sfp->hwmon_tries--) {
1314 mod_delayed_work(system_wq, &sfp->hwmon_probe,
1315 T_PROBE_RETRY_SLOW);
1317 dev_warn(sfp->dev, "hwmon probe failed: %d\n", err);
1322 sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL);
1323 if (!sfp->hwmon_name) {
1324 dev_err(sfp->dev, "out of memory for hwmon name\n");
1328 for (i = 0; sfp->hwmon_name[i]; i++)
1329 if (hwmon_is_bad_char(sfp->hwmon_name[i]))
1330 sfp->hwmon_name[i] = '_';
1332 sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev,
1333 sfp->hwmon_name, sfp,
1334 &sfp_hwmon_chip_info,
1336 if (IS_ERR(sfp->hwmon_dev))
1337 dev_err(sfp->dev, "failed to register hwmon device: %ld\n",
1338 PTR_ERR(sfp->hwmon_dev));
1341 static int sfp_hwmon_insert(struct sfp *sfp)
1343 if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE)
1346 if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM))
1349 if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)
1350 /* This driver in general does not support address
1355 mod_delayed_work(system_wq, &sfp->hwmon_probe, 1);
1356 sfp->hwmon_tries = R_PROBE_RETRY_SLOW;
1361 static void sfp_hwmon_remove(struct sfp *sfp)
1363 cancel_delayed_work_sync(&sfp->hwmon_probe);
1364 if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) {
1365 hwmon_device_unregister(sfp->hwmon_dev);
1366 sfp->hwmon_dev = NULL;
1367 kfree(sfp->hwmon_name);
1371 static int sfp_hwmon_init(struct sfp *sfp)
1373 INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe);
1378 static void sfp_hwmon_exit(struct sfp *sfp)
1380 cancel_delayed_work_sync(&sfp->hwmon_probe);
1383 static int sfp_hwmon_insert(struct sfp *sfp)
1388 static void sfp_hwmon_remove(struct sfp *sfp)
1392 static int sfp_hwmon_init(struct sfp *sfp)
1397 static void sfp_hwmon_exit(struct sfp *sfp)
1403 static void sfp_module_tx_disable(struct sfp *sfp)
1405 dev_dbg(sfp->dev, "tx disable %u -> %u\n",
1406 sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1);
1407 sfp->state |= SFP_F_TX_DISABLE;
1408 sfp_set_state(sfp, sfp->state);
1411 static void sfp_module_tx_enable(struct sfp *sfp)
1413 dev_dbg(sfp->dev, "tx disable %u -> %u\n",
1414 sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0);
1415 sfp->state &= ~SFP_F_TX_DISABLE;
1416 sfp_set_state(sfp, sfp->state);
1419 static void sfp_module_tx_fault_reset(struct sfp *sfp)
1421 unsigned int state = sfp->state;
1423 if (state & SFP_F_TX_DISABLE)
1426 sfp_set_state(sfp, state | SFP_F_TX_DISABLE);
1430 sfp_set_state(sfp, state);
1433 /* SFP state machine */
1434 static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout)
1437 mod_delayed_work(system_power_efficient_wq, &sfp->timeout,
1440 cancel_delayed_work(&sfp->timeout);
1443 static void sfp_sm_next(struct sfp *sfp, unsigned int state,
1444 unsigned int timeout)
1446 sfp->sm_state = state;
1447 sfp_sm_set_timer(sfp, timeout);
1450 static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state,
1451 unsigned int timeout)
1453 sfp->sm_mod_state = state;
1454 sfp_sm_set_timer(sfp, timeout);
1457 static void sfp_sm_phy_detach(struct sfp *sfp)
1459 sfp_remove_phy(sfp->sfp_bus);
1460 phy_device_remove(sfp->mod_phy);
1461 phy_device_free(sfp->mod_phy);
1462 sfp->mod_phy = NULL;
1465 static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45)
1467 struct phy_device *phy;
1470 phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45);
1471 if (phy == ERR_PTR(-ENODEV))
1472 return PTR_ERR(phy);
1474 dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy));
1475 return PTR_ERR(phy);
1478 err = phy_device_register(phy);
1480 phy_device_free(phy);
1481 dev_err(sfp->dev, "phy_device_register failed: %d\n", err);
1485 err = sfp_add_phy(sfp->sfp_bus, phy);
1487 phy_device_remove(phy);
1488 phy_device_free(phy);
1489 dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err);
1498 static void sfp_sm_link_up(struct sfp *sfp)
1500 sfp_link_up(sfp->sfp_bus);
1501 sfp_sm_next(sfp, SFP_S_LINK_UP, 0);
1504 static void sfp_sm_link_down(struct sfp *sfp)
1506 sfp_link_down(sfp->sfp_bus);
1509 static void sfp_sm_link_check_los(struct sfp *sfp)
1511 const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED);
1512 const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL);
1513 __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal);
1516 /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL
1517 * are set, we assume that no LOS signal is available. If both are
1518 * set, we assume LOS is not implemented (and is meaningless.)
1520 if (los_options == los_inverted)
1521 los = !(sfp->state & SFP_F_LOS);
1522 else if (los_options == los_normal)
1523 los = !!(sfp->state & SFP_F_LOS);
1526 sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0);
1528 sfp_sm_link_up(sfp);
1531 static bool sfp_los_event_active(struct sfp *sfp, unsigned int event)
1533 const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED);
1534 const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL);
1535 __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal);
1537 return (los_options == los_inverted && event == SFP_E_LOS_LOW) ||
1538 (los_options == los_normal && event == SFP_E_LOS_HIGH);
1541 static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event)
1543 const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED);
1544 const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL);
1545 __be16 los_options = sfp->id.ext.options & (los_inverted | los_normal);
1547 return (los_options == los_inverted && event == SFP_E_LOS_HIGH) ||
1548 (los_options == los_normal && event == SFP_E_LOS_LOW);
1551 static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn)
1553 if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) {
1555 "module persistently indicates fault, disabling\n");
1556 sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0);
1559 dev_err(sfp->dev, "module transmit fault indicated\n");
1561 sfp_sm_next(sfp, next_state, T_FAULT_RECOVER);
1565 /* Probe a SFP for a PHY device if the module supports copper - the PHY
1566 * normally sits at I2C bus address 0x56, and may either be a clause 22
1569 * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with
1570 * negotiation enabled, but some may be in 1000base-X - which is for the
1571 * PHY driver to determine.
1573 * Clause 45 copper SFP+ modules (10G) appear to switch their interface
1574 * mode according to the negotiated line speed.
1576 static int sfp_sm_probe_for_phy(struct sfp *sfp)
1580 switch (sfp->id.base.extended_cc) {
1581 case SFF8024_ECC_10GBASE_T_SFI:
1582 case SFF8024_ECC_10GBASE_T_SR:
1583 case SFF8024_ECC_5GBASE_T:
1584 case SFF8024_ECC_2_5GBASE_T:
1585 err = sfp_sm_probe_phy(sfp, true);
1589 if (sfp->id.base.e1000_base_t)
1590 err = sfp_sm_probe_phy(sfp, false);
1596 static int sfp_module_parse_power(struct sfp *sfp)
1598 u32 power_mW = 1000;
1601 if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL))
1603 if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL))
1606 supports_a2 = sfp->id.ext.sff8472_compliance !=
1607 SFP_SFF8472_COMPLIANCE_NONE ||
1608 sfp->id.ext.diagmon & SFP_DIAGMON_DDM;
1610 if (power_mW > sfp->max_power_mW) {
1611 /* Module power specification exceeds the allowed maximum. */
1613 /* The module appears not to implement bus address
1614 * 0xa2, so assume that the module powers up in the
1618 "Host does not support %u.%uW modules\n",
1619 power_mW / 1000, (power_mW / 100) % 10);
1623 "Host does not support %u.%uW modules, module left in power mode 1\n",
1624 power_mW / 1000, (power_mW / 100) % 10);
1629 if (power_mW <= 1000) {
1630 /* Modules below 1W do not require a power change sequence */
1631 sfp->module_power_mW = power_mW;
1636 /* The module power level is below the host maximum and the
1637 * module appears not to implement bus address 0xa2, so assume
1638 * that the module powers up in the indicated mode.
1643 /* If the module requires a higher power mode, but also requires
1644 * an address change sequence, warn the user that the module may
1645 * not be functional.
1647 if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) {
1649 "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n",
1650 power_mW / 1000, (power_mW / 100) % 10);
1654 sfp->module_power_mW = power_mW;
1659 static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable)
1664 err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val));
1665 if (err != sizeof(val)) {
1666 dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err);
1670 /* DM7052 reports as a high power module, responds to reads (with
1671 * all bytes 0xff) at 0x51 but does not accept writes. In any case,
1672 * if the bit is already set, we're already in high power mode.
1674 if (!!(val & BIT(0)) == enable)
1682 err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val));
1683 if (err != sizeof(val)) {
1684 dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err);
1689 dev_info(sfp->dev, "Module switched to %u.%uW power level\n",
1690 sfp->module_power_mW / 1000,
1691 (sfp->module_power_mW / 100) % 10);
1696 /* GPON modules based on Realtek RTL8672 and RTL9601C chips (e.g. V-SOL
1697 * V2801F, CarlitoxxPro CPGOS03-0490, Ubiquiti U-Fiber Instant, ...) do
1698 * not support multibyte reads from the EEPROM. Each multi-byte read
1699 * operation returns just one byte of EEPROM followed by zeros. There is
1700 * no way to identify which modules are using Realtek RTL8672 and RTL9601C
1701 * chips. Moreover every OEM of V-SOL V2801F module puts its own vendor
1702 * name and vendor id into EEPROM, so there is even no way to detect if
1703 * module is V-SOL V2801F. Therefore check for those zeros in the read
1704 * data and then based on check switch to reading EEPROM to one byte
1707 static bool sfp_id_needs_byte_io(struct sfp *sfp, void *buf, size_t len)
1709 size_t i, block_size = sfp->i2c_block_size;
1711 /* Already using byte IO */
1712 if (block_size == 1)
1715 for (i = 1; i < len; i += block_size) {
1716 if (memchr_inv(buf + i, '\0', min(block_size - 1, len - i)))
1722 static int sfp_cotsworks_fixup_check(struct sfp *sfp, struct sfp_eeprom_id *id)
1727 if (id->base.phys_id != SFF8024_ID_SFF_8472 ||
1728 id->base.phys_ext_id != SFP_PHYS_EXT_ID_SFP ||
1729 id->base.connector != SFF8024_CONNECTOR_LC) {
1730 dev_warn(sfp->dev, "Rewriting fiber module EEPROM with corrected values\n");
1731 id->base.phys_id = SFF8024_ID_SFF_8472;
1732 id->base.phys_ext_id = SFP_PHYS_EXT_ID_SFP;
1733 id->base.connector = SFF8024_CONNECTOR_LC;
1734 err = sfp_write(sfp, false, SFP_PHYS_ID, &id->base, 3);
1736 dev_err(sfp->dev, "Failed to rewrite module EEPROM: %d\n", err);
1740 /* Cotsworks modules have been found to require a delay between write operations. */
1743 /* Update base structure checksum */
1744 check = sfp_check(&id->base, sizeof(id->base) - 1);
1745 err = sfp_write(sfp, false, SFP_CC_BASE, &check, 1);
1747 dev_err(sfp->dev, "Failed to update base structure checksum in fiber module EEPROM: %d\n", err);
1754 static int sfp_sm_mod_probe(struct sfp *sfp, bool report)
1756 /* SFP module inserted - read I2C data */
1757 struct sfp_eeprom_id id;
1758 bool cotsworks_sfbg;
1763 sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE;
1765 ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base));
1768 dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret);
1772 if (ret != sizeof(id.base)) {
1773 dev_err(sfp->dev, "EEPROM short read: %d\n", ret);
1777 /* Some SFP modules (e.g. Nokia 3FE46541AA) lock up if read from
1778 * address 0x51 is just one byte at a time. Also SFF-8472 requires
1779 * that EEPROM supports atomic 16bit read operation for diagnostic
1780 * fields, so do not switch to one byte reading at a time unless it
1781 * is really required and we have no other option.
1783 if (sfp_id_needs_byte_io(sfp, &id.base, sizeof(id.base))) {
1785 "Detected broken RTL8672/RTL9601C emulated EEPROM\n");
1787 "Switching to reading EEPROM to one byte at a time\n");
1788 sfp->i2c_block_size = 1;
1790 ret = sfp_read(sfp, false, 0, &id.base, sizeof(id.base));
1793 dev_err(sfp->dev, "failed to read EEPROM: %d\n",
1798 if (ret != sizeof(id.base)) {
1799 dev_err(sfp->dev, "EEPROM short read: %d\n", ret);
1804 /* Cotsworks do not seem to update the checksums when they
1805 * do the final programming with the final module part number,
1806 * serial number and date code.
1808 cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16);
1809 cotsworks_sfbg = !memcmp(id.base.vendor_pn, "SFBG", 4);
1811 /* Cotsworks SFF module EEPROM do not always have valid phys_id,
1812 * phys_ext_id, and connector bytes. Rewrite SFF EEPROM bytes if
1813 * Cotsworks PN matches and bytes are not correct.
1815 if (cotsworks && cotsworks_sfbg) {
1816 ret = sfp_cotsworks_fixup_check(sfp, &id);
1821 /* Validate the checksum over the base structure */
1822 check = sfp_check(&id.base, sizeof(id.base) - 1);
1823 if (check != id.base.cc_base) {
1826 "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n",
1827 check, id.base.cc_base);
1830 "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n",
1831 check, id.base.cc_base);
1832 print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET,
1833 16, 1, &id, sizeof(id), true);
1838 ret = sfp_read(sfp, false, SFP_CC_BASE + 1, &id.ext, sizeof(id.ext));
1841 dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret);
1845 if (ret != sizeof(id.ext)) {
1846 dev_err(sfp->dev, "EEPROM short read: %d\n", ret);
1850 check = sfp_check(&id.ext, sizeof(id.ext) - 1);
1851 if (check != id.ext.cc_ext) {
1854 "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n",
1855 check, id.ext.cc_ext);
1858 "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n",
1859 check, id.ext.cc_ext);
1860 print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET,
1861 16, 1, &id, sizeof(id), true);
1862 memset(&id.ext, 0, sizeof(id.ext));
1868 dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n",
1869 (int)sizeof(id.base.vendor_name), id.base.vendor_name,
1870 (int)sizeof(id.base.vendor_pn), id.base.vendor_pn,
1871 (int)sizeof(id.base.vendor_rev), id.base.vendor_rev,
1872 (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn,
1873 (int)sizeof(id.ext.datecode), id.ext.datecode);
1875 /* Check whether we support this module */
1876 if (!sfp->type->module_supported(&id)) {
1878 "module is not supported - phys id 0x%02x 0x%02x\n",
1879 sfp->id.base.phys_id, sfp->id.base.phys_ext_id);
1883 /* If the module requires address swap mode, warn about it */
1884 if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)
1886 "module address swap to access page 0xA2 is not supported.\n");
1888 /* Parse the module power requirement */
1889 ret = sfp_module_parse_power(sfp);
1893 if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) &&
1894 !memcmp(id.base.vendor_pn, "3FE46541AA ", 16))
1895 sfp->module_t_start_up = T_START_UP_BAD_GPON;
1897 sfp->module_t_start_up = T_START_UP;
1899 if (!memcmp(id.base.vendor_name, "HUAWEI ", 16) &&
1900 !memcmp(id.base.vendor_pn, "MA5671A ", 16))
1901 sfp->tx_fault_ignore = true;
1903 sfp->tx_fault_ignore = false;
1908 static void sfp_sm_mod_remove(struct sfp *sfp)
1910 if (sfp->sm_mod_state > SFP_MOD_WAITDEV)
1911 sfp_module_remove(sfp->sfp_bus);
1913 sfp_hwmon_remove(sfp);
1915 memset(&sfp->id, 0, sizeof(sfp->id));
1916 sfp->module_power_mW = 0;
1918 dev_info(sfp->dev, "module removed\n");
1921 /* This state machine tracks the upstream's state */
1922 static void sfp_sm_device(struct sfp *sfp, unsigned int event)
1924 switch (sfp->sm_dev_state) {
1926 if (event == SFP_E_DEV_ATTACH)
1927 sfp->sm_dev_state = SFP_DEV_DOWN;
1931 if (event == SFP_E_DEV_DETACH)
1932 sfp->sm_dev_state = SFP_DEV_DETACHED;
1933 else if (event == SFP_E_DEV_UP)
1934 sfp->sm_dev_state = SFP_DEV_UP;
1938 if (event == SFP_E_DEV_DETACH)
1939 sfp->sm_dev_state = SFP_DEV_DETACHED;
1940 else if (event == SFP_E_DEV_DOWN)
1941 sfp->sm_dev_state = SFP_DEV_DOWN;
1946 /* This state machine tracks the insert/remove state of the module, probes
1947 * the on-board EEPROM, and sets up the power level.
1949 static void sfp_sm_module(struct sfp *sfp, unsigned int event)
1953 /* Handle remove event globally, it resets this state machine */
1954 if (event == SFP_E_REMOVE) {
1955 if (sfp->sm_mod_state > SFP_MOD_PROBE)
1956 sfp_sm_mod_remove(sfp);
1957 sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0);
1961 /* Handle device detach globally */
1962 if (sfp->sm_dev_state < SFP_DEV_DOWN &&
1963 sfp->sm_mod_state > SFP_MOD_WAITDEV) {
1964 if (sfp->module_power_mW > 1000 &&
1965 sfp->sm_mod_state > SFP_MOD_HPOWER)
1966 sfp_sm_mod_hpower(sfp, false);
1967 sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0);
1971 switch (sfp->sm_mod_state) {
1973 if (event == SFP_E_INSERT) {
1974 sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL);
1975 sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT;
1976 sfp->sm_mod_tries = R_PROBE_RETRY_SLOW;
1981 /* Wait for T_PROBE_INIT to time out */
1982 if (event != SFP_E_TIMEOUT)
1985 err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1);
1986 if (err == -EAGAIN) {
1987 if (sfp->sm_mod_tries_init &&
1988 --sfp->sm_mod_tries_init) {
1989 sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT);
1991 } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) {
1992 if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1)
1994 "please wait, module slow to respond\n");
1995 sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW);
2000 sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
2004 err = sfp_hwmon_insert(sfp);
2006 dev_warn(sfp->dev, "hwmon probe failed: %d\n", err);
2008 sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0);
2010 case SFP_MOD_WAITDEV:
2011 /* Ensure that the device is attached before proceeding */
2012 if (sfp->sm_dev_state < SFP_DEV_DOWN)
2015 /* Report the module insertion to the upstream device */
2016 err = sfp_module_insert(sfp->sfp_bus, &sfp->id);
2018 sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
2022 /* If this is a power level 1 module, we are done */
2023 if (sfp->module_power_mW <= 1000)
2026 sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0);
2028 case SFP_MOD_HPOWER:
2029 /* Enable high power mode */
2030 err = sfp_sm_mod_hpower(sfp, true);
2032 if (err != -EAGAIN) {
2033 sfp_module_remove(sfp->sfp_bus);
2034 sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
2036 sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT);
2041 sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL);
2044 case SFP_MOD_WAITPWR:
2045 /* Wait for T_HPOWER_LEVEL to time out */
2046 if (event != SFP_E_TIMEOUT)
2050 sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0);
2053 case SFP_MOD_PRESENT:
2059 static void sfp_sm_main(struct sfp *sfp, unsigned int event)
2061 unsigned long timeout;
2064 /* Some events are global */
2065 if (sfp->sm_state != SFP_S_DOWN &&
2066 (sfp->sm_mod_state != SFP_MOD_PRESENT ||
2067 sfp->sm_dev_state != SFP_DEV_UP)) {
2068 if (sfp->sm_state == SFP_S_LINK_UP &&
2069 sfp->sm_dev_state == SFP_DEV_UP)
2070 sfp_sm_link_down(sfp);
2071 if (sfp->sm_state > SFP_S_INIT)
2072 sfp_module_stop(sfp->sfp_bus);
2074 sfp_sm_phy_detach(sfp);
2075 sfp_module_tx_disable(sfp);
2076 sfp_soft_stop_poll(sfp);
2077 sfp_sm_next(sfp, SFP_S_DOWN, 0);
2081 /* The main state machine */
2082 switch (sfp->sm_state) {
2084 if (sfp->sm_mod_state != SFP_MOD_PRESENT ||
2085 sfp->sm_dev_state != SFP_DEV_UP)
2088 if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE))
2089 sfp_soft_start_poll(sfp);
2091 sfp_module_tx_enable(sfp);
2093 /* Initialise the fault clearance retries */
2094 sfp->sm_fault_retries = N_FAULT_INIT;
2096 /* We need to check the TX_FAULT state, which is not defined
2097 * while TX_DISABLE is asserted. The earliest we want to do
2098 * anything (such as probe for a PHY) is 50ms.
2100 sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT);
2104 if (event != SFP_E_TIMEOUT)
2107 if (sfp->state & SFP_F_TX_FAULT) {
2108 /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431)
2109 * from the TX_DISABLE deassertion for the module to
2110 * initialise, which is indicated by TX_FAULT
2113 timeout = sfp->module_t_start_up;
2114 if (timeout > T_WAIT)
2119 sfp_sm_next(sfp, SFP_S_INIT, timeout);
2121 /* TX_FAULT is not asserted, assume the module has
2122 * finished initialising.
2129 if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) {
2130 /* TX_FAULT is still asserted after t_init or
2131 * or t_start_up, so assume there is a fault.
2133 sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT,
2134 sfp->sm_fault_retries == N_FAULT_INIT);
2135 } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) {
2137 sfp->sm_phy_retries = R_PHY_RETRY;
2142 case SFP_S_INIT_PHY:
2143 if (event != SFP_E_TIMEOUT)
2146 /* TX_FAULT deasserted or we timed out with TX_FAULT
2147 * clear. Probe for the PHY and check the LOS state.
2149 ret = sfp_sm_probe_for_phy(sfp);
2150 if (ret == -ENODEV) {
2151 if (--sfp->sm_phy_retries) {
2152 sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY);
2155 dev_info(sfp->dev, "no PHY detected\n");
2158 sfp_sm_next(sfp, SFP_S_FAIL, 0);
2161 if (sfp_module_start(sfp->sfp_bus)) {
2162 sfp_sm_next(sfp, SFP_S_FAIL, 0);
2165 sfp_sm_link_check_los(sfp);
2167 /* Reset the fault retry count */
2168 sfp->sm_fault_retries = N_FAULT;
2171 case SFP_S_INIT_TX_FAULT:
2172 if (event == SFP_E_TIMEOUT) {
2173 sfp_module_tx_fault_reset(sfp);
2174 sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up);
2178 case SFP_S_WAIT_LOS:
2179 if (event == SFP_E_TX_FAULT)
2180 sfp_sm_fault(sfp, SFP_S_TX_FAULT, true);
2181 else if (sfp_los_event_inactive(sfp, event))
2182 sfp_sm_link_up(sfp);
2186 if (event == SFP_E_TX_FAULT) {
2187 sfp_sm_link_down(sfp);
2188 sfp_sm_fault(sfp, SFP_S_TX_FAULT, true);
2189 } else if (sfp_los_event_active(sfp, event)) {
2190 sfp_sm_link_down(sfp);
2191 sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0);
2195 case SFP_S_TX_FAULT:
2196 if (event == SFP_E_TIMEOUT) {
2197 sfp_module_tx_fault_reset(sfp);
2198 sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up);
2203 if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) {
2204 sfp_sm_fault(sfp, SFP_S_TX_FAULT, false);
2205 } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) {
2206 dev_info(sfp->dev, "module transmit fault recovered\n");
2207 sfp_sm_link_check_los(sfp);
2211 case SFP_S_TX_DISABLE:
2216 static void sfp_sm_event(struct sfp *sfp, unsigned int event)
2218 mutex_lock(&sfp->sm_mutex);
2220 dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n",
2221 mod_state_to_str(sfp->sm_mod_state),
2222 dev_state_to_str(sfp->sm_dev_state),
2223 sm_state_to_str(sfp->sm_state),
2224 event_to_str(event));
2226 sfp_sm_device(sfp, event);
2227 sfp_sm_module(sfp, event);
2228 sfp_sm_main(sfp, event);
2230 dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n",
2231 mod_state_to_str(sfp->sm_mod_state),
2232 dev_state_to_str(sfp->sm_dev_state),
2233 sm_state_to_str(sfp->sm_state));
2235 mutex_unlock(&sfp->sm_mutex);
2238 static void sfp_attach(struct sfp *sfp)
2240 sfp_sm_event(sfp, SFP_E_DEV_ATTACH);
2243 static void sfp_detach(struct sfp *sfp)
2245 sfp_sm_event(sfp, SFP_E_DEV_DETACH);
2248 static void sfp_start(struct sfp *sfp)
2250 sfp_sm_event(sfp, SFP_E_DEV_UP);
2253 static void sfp_stop(struct sfp *sfp)
2255 sfp_sm_event(sfp, SFP_E_DEV_DOWN);
2258 static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo)
2260 /* locking... and check module is present */
2262 if (sfp->id.ext.sff8472_compliance &&
2263 !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) {
2264 modinfo->type = ETH_MODULE_SFF_8472;
2265 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
2267 modinfo->type = ETH_MODULE_SFF_8079;
2268 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
2273 static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee,
2276 unsigned int first, last, len;
2283 last = ee->offset + ee->len;
2284 if (first < ETH_MODULE_SFF_8079_LEN) {
2285 len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN);
2288 ret = sfp_read(sfp, false, first, data, len);
2295 if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) {
2296 len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN);
2298 first -= ETH_MODULE_SFF_8079_LEN;
2300 ret = sfp_read(sfp, true, first, data, len);
2307 static const struct sfp_socket_ops sfp_module_ops = {
2308 .attach = sfp_attach,
2309 .detach = sfp_detach,
2312 .module_info = sfp_module_info,
2313 .module_eeprom = sfp_module_eeprom,
2316 static void sfp_timeout(struct work_struct *work)
2318 struct sfp *sfp = container_of(work, struct sfp, timeout.work);
2321 sfp_sm_event(sfp, SFP_E_TIMEOUT);
2325 static void sfp_check_state(struct sfp *sfp)
2327 unsigned int state, i, changed;
2329 mutex_lock(&sfp->st_mutex);
2330 state = sfp_get_state(sfp);
2331 changed = state ^ sfp->state;
2332 if (sfp->tx_fault_ignore)
2333 changed &= SFP_F_PRESENT | SFP_F_LOS;
2335 changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT;
2337 for (i = 0; i < GPIO_MAX; i++)
2338 if (changed & BIT(i))
2339 dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i],
2340 !!(sfp->state & BIT(i)), !!(state & BIT(i)));
2342 state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT);
2346 if (changed & SFP_F_PRESENT)
2347 sfp_sm_event(sfp, state & SFP_F_PRESENT ?
2348 SFP_E_INSERT : SFP_E_REMOVE);
2350 if (changed & SFP_F_TX_FAULT)
2351 sfp_sm_event(sfp, state & SFP_F_TX_FAULT ?
2352 SFP_E_TX_FAULT : SFP_E_TX_CLEAR);
2354 if (changed & SFP_F_LOS)
2355 sfp_sm_event(sfp, state & SFP_F_LOS ?
2356 SFP_E_LOS_HIGH : SFP_E_LOS_LOW);
2358 mutex_unlock(&sfp->st_mutex);
2361 static irqreturn_t sfp_irq(int irq, void *data)
2363 struct sfp *sfp = data;
2365 sfp_check_state(sfp);
2370 static void sfp_poll(struct work_struct *work)
2372 struct sfp *sfp = container_of(work, struct sfp, poll.work);
2374 sfp_check_state(sfp);
2376 if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) ||
2378 mod_delayed_work(system_wq, &sfp->poll, poll_jiffies);
2381 static struct sfp *sfp_alloc(struct device *dev)
2385 sfp = kzalloc(sizeof(*sfp), GFP_KERNEL);
2387 return ERR_PTR(-ENOMEM);
2390 sfp->i2c_block_size = SFP_EEPROM_BLOCK_SIZE;
2392 mutex_init(&sfp->sm_mutex);
2393 mutex_init(&sfp->st_mutex);
2394 INIT_DELAYED_WORK(&sfp->poll, sfp_poll);
2395 INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout);
2397 sfp_hwmon_init(sfp);
2402 static void sfp_cleanup(void *data)
2404 struct sfp *sfp = data;
2406 sfp_hwmon_exit(sfp);
2408 cancel_delayed_work_sync(&sfp->poll);
2409 cancel_delayed_work_sync(&sfp->timeout);
2411 mdiobus_unregister(sfp->i2c_mii);
2412 mdiobus_free(sfp->i2c_mii);
2415 i2c_put_adapter(sfp->i2c);
2419 static int sfp_probe(struct platform_device *pdev)
2421 const struct sff_data *sff;
2422 struct i2c_adapter *i2c;
2427 sfp = sfp_alloc(&pdev->dev);
2429 return PTR_ERR(sfp);
2431 platform_set_drvdata(pdev, sfp);
2433 err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp);
2437 sff = sfp->type = &sfp_data;
2439 if (pdev->dev.of_node) {
2440 struct device_node *node = pdev->dev.of_node;
2441 const struct of_device_id *id;
2442 struct device_node *np;
2444 id = of_match_node(sfp_of_match, node);
2448 sff = sfp->type = id->data;
2450 np = of_parse_phandle(node, "i2c-bus", 0);
2452 dev_err(sfp->dev, "missing 'i2c-bus' property\n");
2456 i2c = of_find_i2c_adapter_by_node(np);
2458 } else if (has_acpi_companion(&pdev->dev)) {
2459 struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
2460 struct fwnode_handle *fw = acpi_fwnode_handle(adev);
2461 struct fwnode_reference_args args;
2462 struct acpi_handle *acpi_handle;
2465 ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args);
2466 if (ret || !is_acpi_device_node(args.fwnode)) {
2467 dev_err(&pdev->dev, "missing 'i2c-bus' property\n");
2471 acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode);
2472 i2c = i2c_acpi_find_adapter_by_handle(acpi_handle);
2478 return -EPROBE_DEFER;
2480 err = sfp_i2c_configure(sfp, i2c);
2482 i2c_put_adapter(i2c);
2486 for (i = 0; i < GPIO_MAX; i++)
2487 if (sff->gpios & BIT(i)) {
2488 sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev,
2489 gpio_of_names[i], gpio_flags[i]);
2490 if (IS_ERR(sfp->gpio[i]))
2491 return PTR_ERR(sfp->gpio[i]);
2494 sfp->get_state = sfp_gpio_get_state;
2495 sfp->set_state = sfp_gpio_set_state;
2497 /* Modules that have no detect signal are always present */
2498 if (!(sfp->gpio[GPIO_MODDEF0]))
2499 sfp->get_state = sff_gpio_get_state;
2501 device_property_read_u32(&pdev->dev, "maximum-power-milliwatt",
2502 &sfp->max_power_mW);
2503 if (!sfp->max_power_mW)
2504 sfp->max_power_mW = 1000;
2506 dev_info(sfp->dev, "Host maximum power %u.%uW\n",
2507 sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10);
2509 /* Get the initial state, and always signal TX disable,
2510 * since the network interface will not be up.
2512 sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE;
2514 if (sfp->gpio[GPIO_RATE_SELECT] &&
2515 gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT]))
2516 sfp->state |= SFP_F_RATE_SELECT;
2517 sfp_set_state(sfp, sfp->state);
2518 sfp_module_tx_disable(sfp);
2519 if (sfp->state & SFP_F_PRESENT) {
2521 sfp_sm_event(sfp, SFP_E_INSERT);
2525 for (i = 0; i < GPIO_MAX; i++) {
2526 if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i])
2529 sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]);
2530 if (sfp->gpio_irq[i] < 0) {
2531 sfp->gpio_irq[i] = 0;
2532 sfp->need_poll = true;
2536 sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL,
2537 "%s-%s", dev_name(sfp->dev),
2543 err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i],
2546 IRQF_TRIGGER_RISING |
2547 IRQF_TRIGGER_FALLING,
2550 sfp->gpio_irq[i] = 0;
2551 sfp->need_poll = true;
2556 mod_delayed_work(system_wq, &sfp->poll, poll_jiffies);
2558 /* We could have an issue in cases no Tx disable pin is available or
2559 * wired as modules using a laser as their light source will continue to
2560 * be active when the fiber is removed. This could be a safety issue and
2561 * we should at least warn the user about that.
2563 if (!sfp->gpio[GPIO_TX_DISABLE])
2565 "No tx_disable pin: SFP modules will always be emitting.\n");
2567 sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops);
2574 static int sfp_remove(struct platform_device *pdev)
2576 struct sfp *sfp = platform_get_drvdata(pdev);
2578 sfp_unregister_socket(sfp->sfp_bus);
2581 sfp_sm_event(sfp, SFP_E_REMOVE);
2587 static void sfp_shutdown(struct platform_device *pdev)
2589 struct sfp *sfp = platform_get_drvdata(pdev);
2592 for (i = 0; i < GPIO_MAX; i++) {
2593 if (!sfp->gpio_irq[i])
2596 devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp);
2599 cancel_delayed_work_sync(&sfp->poll);
2600 cancel_delayed_work_sync(&sfp->timeout);
2603 static struct platform_driver sfp_driver = {
2605 .remove = sfp_remove,
2606 .shutdown = sfp_shutdown,
2609 .of_match_table = sfp_of_match,
2613 static int sfp_init(void)
2615 poll_jiffies = msecs_to_jiffies(100);
2617 return platform_driver_register(&sfp_driver);
2619 module_init(sfp_init);
2621 static void sfp_exit(void)
2623 platform_driver_unregister(&sfp_driver);
2625 module_exit(sfp_exit);
2627 MODULE_ALIAS("platform:sfp");
2628 MODULE_AUTHOR("Russell King");
2629 MODULE_LICENSE("GPL v2");