diff options
author | Michael Schmitz <schmitzmic@gmail.com> | 2018-04-19 14:05:18 +1200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2018-04-19 16:11:10 -0400 |
commit | 31dd83b966410915a56358a8a3fc13c54d016fb3 (patch) | |
tree | 87fd34895230dff76572b0e979a4a0601ba725f9 /drivers/net | |
parent | 32e43779fc019ad777c9502210221e3891fdc1bf (diff) | |
download | linux-31dd83b966410915a56358a8a3fc13c54d016fb3.tar.bz2 |
net-next: phy: new Asix Electronics PHY driver
The Asix Electronics PHY found on the X-Surf 100 Amiga Zorro network
card by Individual Computers is buggy, and needs the reset bit toggled
as workaround to make a PHY soft reset succeed.
Add workaround driver just for this special case.
Suggested in xsurf100 patch series review by Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/phy/Kconfig | 6 | ||||
-rw-r--r-- | drivers/net/phy/Makefile | 1 | ||||
-rw-r--r-- | drivers/net/phy/asix.c | 63 |
3 files changed, 70 insertions, 0 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index bdfbabb86ee0..edb8b9ab827f 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -218,6 +218,12 @@ config AQUANTIA_PHY ---help--- Currently supports the Aquantia AQ1202, AQ2104, AQR105, AQR405 +config ASIX_PHY + tristate "Asix PHYs" + help + Currently supports the Asix Electronics PHY found in the X-Surf 100 + AX88796B package. + config AT803X_PHY tristate "AT803X PHYs" ---help--- diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 01acbcb2c798..701ca0b8717e 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -45,6 +45,7 @@ obj-y += $(sfp-obj-y) $(sfp-obj-m) obj-$(CONFIG_AMD_PHY) += amd.o obj-$(CONFIG_AQUANTIA_PHY) += aquantia.o +obj-$(CONFIG_ASIX_PHY) += asix.o obj-$(CONFIG_AT803X_PHY) += at803x.o obj-$(CONFIG_BCM63XX_PHY) += bcm63xx.o obj-$(CONFIG_BCM7XXX_PHY) += bcm7xxx.o diff --git a/drivers/net/phy/asix.c b/drivers/net/phy/asix.c new file mode 100644 index 000000000000..8ebe7f5484ae --- /dev/null +++ b/drivers/net/phy/asix.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Driver for Asix PHYs + * + * Author: Michael Schmitz <schmitzmic@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mii.h> +#include <linux/phy.h> + +#define PHY_ID_ASIX_AX88796B 0x003b1841 + +MODULE_DESCRIPTION("Asix PHY driver"); +MODULE_AUTHOR("Michael Schmitz <schmitzmic@gmail.com>"); +MODULE_LICENSE("GPL"); + +/** + * asix_soft_reset - software reset the PHY via BMCR_RESET bit + * @phydev: target phy_device struct + * + * Description: Perform 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. + * + * Returns: 0 on success, < 0 on failure + */ +static int asix_soft_reset(struct phy_device *phydev) +{ + int ret; + + /* Asix PHY won't reset unless reset bit toggles */ + ret = phy_write(phydev, MII_BMCR, 0); + if (ret < 0) + return ret; + + return genphy_soft_reset(phydev); +} + +static struct phy_driver asix_driver[] = { { + .phy_id = PHY_ID_ASIX_AX88796B, + .name = "Asix Electronics AX88796B", + .phy_id_mask = 0xfffffff0, + .features = PHY_BASIC_FEATURES, + .soft_reset = asix_soft_reset, +} }; + +module_phy_driver(asix_driver); + +static struct mdio_device_id __maybe_unused asix_tbl[] = { + { PHY_ID_ASIX_AX88796B, 0xfffffff0 }, + { } +}; + +MODULE_DEVICE_TABLE(mdio, asix_tbl); |