diff options
Diffstat (limited to 'drivers/net/phy/sfp.c')
| -rw-r--r-- | drivers/net/phy/sfp.c | 63 |
1 files changed, 52 insertions, 11 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 554acc869c25..2d816aadea79 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -185,12 +185,14 @@ struct sfp { int (*write)(struct sfp *, bool, u8, void *, size_t); struct gpio_desc *gpio[GPIO_MAX]; + int gpio_irq[GPIO_MAX]; bool attached; + struct mutex st_mutex; /* Protects state */ unsigned int state; struct delayed_work poll; struct delayed_work timeout; - struct mutex sm_mutex; + struct mutex sm_mutex; /* Protects state machine */ unsigned char sm_mod_state; unsigned char sm_dev_state; unsigned short sm_state; @@ -282,6 +284,7 @@ static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, { struct i2c_msg msgs[2]; u8 bus_addr = a2 ? 0x51 : 0x50; + size_t this_len; int ret; msgs[0].addr = bus_addr; @@ -293,11 +296,26 @@ static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, msgs[1].len = len; msgs[1].buf = buf; - ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); - if (ret < 0) - return ret; + while (len) { + this_len = len; + if (this_len > 16) + this_len = 16; - return ret == ARRAY_SIZE(msgs) ? len : 0; + msgs[1].len = this_len; + + ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); + if (ret < 0) + return ret; + + if (ret != ARRAY_SIZE(msgs)) + break; + + msgs[1].buf += this_len; + dev_addr += this_len; + len -= this_len; + } + + return msgs[1].buf - (u8 *)buf; } static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, @@ -1704,6 +1722,7 @@ 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; @@ -1729,6 +1748,7 @@ static void sfp_check_state(struct sfp *sfp) 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) @@ -1759,6 +1779,7 @@ static struct sfp *sfp_alloc(struct device *dev) 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); @@ -1786,7 +1807,7 @@ static int sfp_probe(struct platform_device *pdev) struct i2c_adapter *i2c; struct sfp *sfp; bool poll = false; - int irq, err, i; + int err, i; sfp = sfp_alloc(&pdev->dev); if (IS_ERR(sfp)) @@ -1827,7 +1848,7 @@ static int sfp_probe(struct platform_device *pdev) int ret; ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); - if (ACPI_FAILURE(ret) || !is_acpi_device_node(args.fwnode)) { + if (ret || !is_acpi_device_node(args.fwnode)) { dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); return -ENODEV; } @@ -1885,19 +1906,22 @@ static int sfp_probe(struct platform_device *pdev) if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) continue; - irq = gpiod_to_irq(sfp->gpio[i]); - if (!irq) { + sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); + if (!sfp->gpio_irq[i]) { poll = true; continue; } - err = devm_request_threaded_irq(sfp->dev, irq, NULL, sfp_irq, + err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], + NULL, sfp_irq, IRQF_ONESHOT | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, dev_name(sfp->dev), sfp); - if (err) + if (err) { + sfp->gpio_irq[i] = 0; poll = true; + } } if (poll) @@ -1928,9 +1952,26 @@ static int sfp_remove(struct platform_device *pdev) 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, |