diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/phy/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/net/phy/Makefile | 6 | ||||
| -rw-r--r-- | drivers/net/phy/ax88796b_rust.rs | 135 |
3 files changed, 148 insertions, 1 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 6e1f5e1b6f24..2e4667bf9ff5 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -112,6 +112,14 @@ config AX88796B_PHY Currently supports the Asix Electronics PHY found in the X-Surf 100 AX88796B package. +config AX88796B_RUST_PHY + bool "Rust reference driver for Asix PHYs" + depends on RUST_PHYLIB_ABSTRACTIONS && AX88796B_PHY + help + Uses the Rust reference driver for Asix PHYs (ax88796b_rust.ko). + The features are equivalent. It supports the Asix Electronics PHY + found in the X-Surf 100 AX88796B package. + config BROADCOM_PHY tristate "Broadcom 54XX PHYs" select BCM_NET_PHYLIB diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 4ace41095ee2..e35ea69d9cb4 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -37,7 +37,11 @@ obj-$(CONFIG_ADIN1100_PHY) += adin1100.o obj-$(CONFIG_AMD_PHY) += amd.o obj-$(CONFIG_AQUANTIA_PHY) += aquantia/ obj-$(CONFIG_AT803X_PHY) += at803x.o -obj-$(CONFIG_AX88796B_PHY) += ax88796b.o +ifdef CONFIG_AX88796B_RUST_PHY + obj-$(CONFIG_AX88796B_PHY) += ax88796b_rust.o +else + obj-$(CONFIG_AX88796B_PHY) += ax88796b.o +endif obj-$(CONFIG_BCM54140_PHY) += bcm54140.o obj-$(CONFIG_BCM63XX_PHY) += bcm63xx.o obj-$(CONFIG_BCM7XXX_PHY) += bcm7xxx.o diff --git a/drivers/net/phy/ax88796b_rust.rs b/drivers/net/phy/ax88796b_rust.rs new file mode 100644 index 000000000000..5c92572962dc --- /dev/null +++ b/drivers/net/phy/ax88796b_rust.rs @@ -0,0 +1,135 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2023 FUJITA Tomonori <fujita.tomonori@gmail.com> + +//! Rust Asix PHYs driver +//! +//! C version of this driver: [`drivers/net/phy/ax88796b.c`](./ax88796b.c) +use kernel::{ + c_str, + net::phy::{self, DeviceId, Driver}, + prelude::*, + uapi, +}; + +kernel::module_phy_driver! { + drivers: [PhyAX88772A, PhyAX88772C, PhyAX88796B], + device_table: [ + DeviceId::new_with_driver::<PhyAX88772A>(), + DeviceId::new_with_driver::<PhyAX88772C>(), + DeviceId::new_with_driver::<PhyAX88796B>() + ], + name: "rust_asix_phy", + author: "FUJITA Tomonori <fujita.tomonori@gmail.com>", + description: "Rust Asix PHYs driver", + license: "GPL", +} + +const MII_BMCR: u16 = uapi::MII_BMCR as u16; +const BMCR_SPEED100: u16 = uapi::BMCR_SPEED100 as u16; +const BMCR_FULLDPLX: u16 = uapi::BMCR_FULLDPLX as u16; + +// Performs a software PHY reset using the standard +// BMCR_RESET bit and poll for the reset bit to be cleared. +// Toggle BMCR_RESET bit off to accommodate broken AX8796B PHY implementation +// such as used on the Individual Computers' X-Surf 100 Zorro card. +fn asix_soft_reset(dev: &mut phy::Device) -> Result { + dev.write(uapi::MII_BMCR as u16, 0)?; + dev.genphy_soft_reset() +} + +struct PhyAX88772A; + +#[vtable] +impl Driver for PhyAX88772A { + const FLAGS: u32 = phy::flags::IS_INTERNAL; + const NAME: &'static CStr = c_str!("Asix Electronics AX88772A"); + const PHY_DEVICE_ID: DeviceId = DeviceId::new_with_exact_mask(0x003b1861); + + // AX88772A is not working properly with some old switches (NETGEAR EN 108TP): + // after autoneg is done and the link status is reported as active, the MII_LPA + // register is 0. This issue is not reproducible on AX88772C. + fn read_status(dev: &mut phy::Device) -> Result<u16> { + dev.genphy_update_link()?; + if !dev.is_link_up() { + return Ok(0); + } + // If MII_LPA is 0, phy_resolve_aneg_linkmode() will fail to resolve + // linkmode so use MII_BMCR as default values. + let ret = dev.read(MII_BMCR)?; + + if ret & BMCR_SPEED100 != 0 { + dev.set_speed(uapi::SPEED_100); + } else { + dev.set_speed(uapi::SPEED_10); + } + + let duplex = if ret & BMCR_FULLDPLX != 0 { + phy::DuplexMode::Full + } else { + phy::DuplexMode::Half + }; + dev.set_duplex(duplex); + + dev.genphy_read_lpa()?; + + if dev.is_autoneg_enabled() && dev.is_autoneg_completed() { + dev.resolve_aneg_linkmode(); + } + + Ok(0) + } + + fn suspend(dev: &mut phy::Device) -> Result { + dev.genphy_suspend() + } + + fn resume(dev: &mut phy::Device) -> Result { + dev.genphy_resume() + } + + fn soft_reset(dev: &mut phy::Device) -> Result { + asix_soft_reset(dev) + } + + fn link_change_notify(dev: &mut phy::Device) { + // Reset PHY, otherwise MII_LPA will provide outdated information. + // This issue is reproducible only with some link partner PHYs. + if dev.state() == phy::DeviceState::NoLink { + let _ = dev.init_hw(); + let _ = dev.start_aneg(); + } + } +} + +struct PhyAX88772C; + +#[vtable] +impl Driver for PhyAX88772C { + const FLAGS: u32 = phy::flags::IS_INTERNAL; + const NAME: &'static CStr = c_str!("Asix Electronics AX88772C"); + const PHY_DEVICE_ID: DeviceId = DeviceId::new_with_exact_mask(0x003b1881); + + fn suspend(dev: &mut phy::Device) -> Result { + dev.genphy_suspend() + } + + fn resume(dev: &mut phy::Device) -> Result { + dev.genphy_resume() + } + + fn soft_reset(dev: &mut phy::Device) -> Result { + asix_soft_reset(dev) + } +} + +struct PhyAX88796B; + +#[vtable] +impl Driver for PhyAX88796B { + const NAME: &'static CStr = c_str!("Asix Electronics AX88796B"); + const PHY_DEVICE_ID: DeviceId = DeviceId::new_with_model_mask(0x003b1841); + + fn soft_reset(dev: &mut phy::Device) -> Result { + asix_soft_reset(dev) + } +} |