kernel/linux.git/drivers/net/phy/bcm-phy-lib.h, branch linux-7.0.y

net: phy: bcm-phy-lib: Implement BroadR-Reach link modes

2024-07-15T03:38:35+00:00

Implement single-pair BroadR-Reach modes on bcm5481x PHY by Broadcom. Create set of functions alternative to IEEE 802.3 to handle configuration of these modes on compatible Broadcom PHYs. There is only subset of capabilities supported because of limited collection of hardware available for the development. For BroadR-Reach capable PHYs, the LRE (Long Reach Ethernet) alternative register set is handled. Only bcm54811 PHY is verified, for bcm54810, there is some support possible but untested. There is no auto-negotiation of the link parameters (called LDS in the Broadcom terminology, Long-Distance Signaling) for bcm54811. It should be possible to enable LDS for bcm54810. Signed-off-by: Kamil Horák (2N) Reviewed-by: Andrew Lunn Reviewed-by: Florian Fainelli Link: https://patch.msgid.link/20240712150709.3134474-5-kamilh@axis.com Signed-off-by: Jakub Kicinski

net: phy: broadcom: Add support for setting LED brightness

2023-06-09T09:38:43+00:00

Broadcom PHYs have two LEDs selector registers which allow us to control the LED assignment, including how to turn them on/off. Signed-off-by: Florian Fainelli Reviewed-by: Simon Horman Signed-off-by: David S. Miller

net: phy: broadcom: Register dummy IRQ handler

2023-05-26T11:17:06+00:00

In order to have our interrupt descriptor fully setup and in particular the action, ensure that we register a full fledged interrupt handler. This also allow us to set the interrupt polarity and flow through the same call. This is specifically necessary for kernel/irq/pm.c::suspend_device_irq to set the interrupt descriptor to the IRQD_WAKEUP_ARMED state and enable the interrupt for wake-up since it was still in a disabled state. Without an interrupt descriptor we would have ran into cases where the wake-up interrupt is not capable of waking up the system, specifically if we resumed the system ACPI S5 using the Ethernet PHY. In that case the Ethernet PHY interrupt would be pending by the time the kernel booted, which it would acknowledge but then we could never use it as a wake-up source again. Fixes: 8baddaa9d4ba ("net: phy: broadcom: Add support for Wake-on-LAN") Suggested-by: Doug Berger Debugged-by: Doug Berger Signed-off-by: Florian Fainelli Reviewed-by: Simon Horman Signed-off-by: David S. Miller

net: phy: broadcom: Add support for Wake-on-LAN

2023-05-13T15:56:29+00:00

Add support for WAKE_UCAST, WAKE_MCAST, WAKE_BCAST, WAKE_MAGIC and WAKE_MAGICSECURE. This is only supported with the BCM54210E and compatible Ethernet PHYs. Using the in-band interrupt or an out of band GPIO interrupts are supported. Broadcom PHYs will generate a Wake-on-LAN level low interrupt on LED4 as soon as one of the supported patterns is being matched. That includes generating such an interrupt even if the PHY is operated during normal modes. If WAKE_UCAST is selected, this could lead to the LED4 interrupt firing up for every packet being received which is absolutely undesirable from a performance point of view. Because the Wake-on-LAN configuration can be set long before the system is actually put to sleep, we cannot have an interrupt service routine to clear on read the interrupt status register and ensure that new packet matches will be detected. It is desirable to enable the Wake-on-LAN interrupt as late as possible during the system suspend process such that we limit the number of interrupts to be handled by the system, but also conversely feed into the Linux's system suspend way of dealing with interrupts in and around the points of no return. Reviewed-by: Simon Horman Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller

net: phy: bcm7xx: Correct read from expansion register

2023-05-10T03:25:52+00:00

Since the driver works in the "legacy" addressing mode, we need to write to the expansion register (0x17) with bits 11:8 set to 0xf to properly select the expansion register passed as argument. Fixes: f68d08c437f9 ("net: phy: bcm7xxx: Add EPHY entry for 72165") Signed-off-by: Florian Fainelli Reviewed-by: Simon Horman Link: https://lore.kernel.org/r/20230508231749.1681169-1-f.fainelli@gmail.com Signed-off-by: Jakub Kicinski

net: phy: broadcom: Add Broadcom PTP hooks to bcm-phy-lib

2022-06-24T03:49:02+00:00

Add 'struct bcm_ptp_private' to bcm54xx_phy_priv which points to an optional PTP structure attached to the PHY. This is allocated on probe if PHY PTP support is configured, and if the driver supports PTP for the specified PHY. Add the bcm_ptp_probe(), bcm_ptp_config_init() and bcn_ptp_stop() API functions to the bcm-phy library. Signed-off-by: Jonathan Lemon Reviewed-by: Florian Fainelli Acked-by: Richard Cochran Signed-off-by: Jakub Kicinski

net: phy: broadcom: implement generic .handle_interrupt() callback

2020-11-06T00:32:27+00:00

In an attempt to actually support shared IRQs in phylib, we now move the responsibility of triggering the phylib state machine or just returning IRQ_NONE, based on the IRQ status register, to the PHY driver. Having 3 different IRQ handling callbacks (.handle_interrupt(), .did_interrupt() and .ack_interrupt() ) is confusing so let the PHY driver implement directly an IRQ handler like any other device driver. Make this driver follow the new convention. Cc: Florian Fainelli Signed-off-by: Ioana Ciornei Tested-by: Michael Walle Signed-off-by: Jakub Kicinski

net: phy: broadcom: add cable test support

2020-05-13T19:52:38+00:00

Most modern broadcom PHYs support ECD (enhanced cable diagnostics). Add support for it in the bcm-phy-lib so they can easily be used in the PHY driver. There are two access methods for ECD: legacy by expansion registers and via the new RDB registers which are exclusive. Provide functions in two variants where the PHY driver can choose from. To keep things simple for now, we just switch the register access to expansion registers in the RDB variant for now. On the flipside, we have to keep a bus lock to prevent any other non-legacy access on the PHY. The results of the intra-pair tests are inconclusive (at least for the BCM54140). Most of the times half the length is reported but sometimes the length is correct. Signed-off-by: Michael Walle Reviewed-by: Florian Fainelli Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller

net: phy: broadcom: add bcm_phy_modify_exp()

2020-05-13T19:52:38+00:00

Add the convenience function to do a read-modify-write. This has the additional benefit of saving one write to the selection register. Signed-off-by: Michael Walle Reviewed-by: Florian Fainelli Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller

net: phy: broadcom: add exp register access methods without buslock

2020-05-13T19:52:38+00:00

Add helper to read and write expansion registers without taking the mdio lock. Please note, that this changes the semantics of the read and write. Before there was no lock between selecting the expansion register and the actual read/write. This may lead to access failures if there are parallel accesses. Instead take the bus lock during the whole access cycle. Signed-off-by: Michael Walle Reviewed-by: Florian Fainelli Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller