Messages in this thread Patch in this message | | | From | Alexander Stein <> | Subject | [PATCH 1/1 RFC] net/phy: Add Lantiq PHY driver | Date | Wed, 18 May 2016 18:03:23 +0200 |
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This currently only supports PEF7071 and allows to specify max-speed and is able to read the LED configuration from device-tree.
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> --- The main purpose for now is to set a LED configuration from device tree and to limit the maximum speed. The latter one in my case hardware limited. As MAC and it's link partner support 1000MBit/s they would try to use that but will eventually fail due to magnetics only supporting 100MBit/s. So limit the maximum link speed supported directly from the start.
As this is a RFC I skipped the device tree binding doc.
drivers/net/phy/Kconfig | 5 ++ drivers/net/phy/Makefile | 1 + drivers/net/phy/lantiq.c | 167 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 173 insertions(+) create mode 100644 drivers/net/phy/lantiq.c
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 3e28f7a..c004885 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -119,6 +119,11 @@ config STE10XP ---help--- This is the driver for the STe100p and STe101p PHYs. +config LANTIQ_PHY + tristate "Driver for Lantiq PHYs" + ---help--- + Supports the PEF7071 PHYs. + config LSI_ET1011C_PHY tristate "Driver for LSI ET1011C PHY" ---help--- diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 8ad4ac6..e886549 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -38,3 +38,4 @@ obj-$(CONFIG_MDIO_SUN4I) += mdio-sun4i.o obj-$(CONFIG_MDIO_MOXART) += mdio-moxart.o obj-$(CONFIG_AMD_XGBE_PHY) += amd-xgbe-phy.o obj-$(CONFIG_MDIO_BCM_UNIMAC) += mdio-bcm-unimac.o +obj-$(CONFIG_LANTIQ_PHY) += lantiq.o diff --git a/drivers/net/phy/lantiq.c b/drivers/net/phy/lantiq.c new file mode 100644 index 0000000..876a7d1 --- /dev/null +++ b/drivers/net/phy/lantiq.c @@ -0,0 +1,167 @@ +/* + * Driver for Lantiq PHYs + * + * Author: Alexander Stein <alexander.stein@systec-electronic.com> + * + * Copyright (c) 2015-2016 SYS TEC electronic GmbH + * + * 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/module.h> +#include <linux/phy.h> +#include <linux/of.h> + +#define PHY_ID_PEF7071 0xd565a401 + +#define MII_LANTIQ_MMD_CTRL_REG 0x0d +#define MII_LANTIQ_MMD_REGDATA_REG 0x0e +#define OP_DATA 1 + +struct lantiqphy_led_ctrl { + const char *property; + u32 regnum; +}; + +static int lantiq_extended_write(struct phy_device *phydev, + u8 mode, u32 dev_addr, u32 regnum, u16 val) +{ + phy_write(phydev, MII_LANTIQ_MMD_CTRL_REG, dev_addr); + phy_write(phydev, MII_LANTIQ_MMD_REGDATA_REG, regnum); + phy_write(phydev, MII_LANTIQ_MMD_CTRL_REG, (mode << 14) | dev_addr); + return phy_write(phydev, MII_LANTIQ_MMD_REGDATA_REG, val); +} + +static int lantiq_of_load_led_config(struct phy_device *phydev, + struct device_node *of_node, + const struct lantiqphy_led_ctrl *leds, + u8 entries) +{ + u16 val; + int i; + int ret = 0; + + for (i = 0; i < entries; i++) { + if (!of_property_read_u16(of_node, leds[i].property, &val)) { + ret = lantiq_extended_write(phydev, OP_DATA, 0x1f, + leds[i].regnum, val); + if (ret) { + dev_err(&phydev->dev, "Error writing register 0x1f.%04x (%d)\n", + leds[i].regnum, ret); + break; + } + } + } + + return ret; +} + +static const struct lantiqphy_led_ctrl leds[] = { + { + .property = "led0h", + .regnum = 0x01e2, + }, + { + .property = "led0l", + .regnum = 0x01e3, + }, + { + .property = "led1h", + .regnum = 0x01e4, + }, + { + .property = "led1l", + .regnum = 0x01e5, + }, + { + .property = "led2h", + .regnum = 0x01e6, + }, + { + .property = "led2l", + .regnum = 0x01e7, + }, +}; + +static int lantiqphy_config_init(struct phy_device *phydev) +{ + struct device *dev = &phydev->dev; + struct device_node *of_node = dev->of_node; + u32 max_speed; + + if (!of_node && dev->parent->of_node) + of_node = dev->parent->of_node; + + if (of_node) { + lantiq_of_load_led_config(phydev, of_node, leds, + ARRAY_SIZE(leds)); + + if (!of_property_read_u32(of_node, "max-speed", + &max_speed)) { + /* The default values for phydev->supported are + * provided by the PHY driver "features" member, + * we want to reset to sane defaults fist before + * supporting higher speeds. + */ + phydev->supported &= PHY_DEFAULT_FEATURES; + + switch (max_speed) { + default: + break; + + case SPEED_1000: + phydev->supported |= PHY_1000BT_FEATURES; + case SPEED_100: + phydev->supported |= PHY_100BT_FEATURES; + case SPEED_10: + phydev->supported |= PHY_10BT_FEATURES; + } + } + } + return 0; +} + +static struct phy_driver lantiqphy_driver[] = { +{ + .phy_id = PHY_ID_PEF7071, + .phy_id_mask = 0x00fffffe, + .name = "Lantiq PEF7071", + .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause), + .flags = PHY_HAS_MAGICANEG, + .config_init = lantiqphy_config_init, + .config_aneg = genphy_config_aneg, + .read_status = genphy_read_status, + .suspend = genphy_suspend, + .resume = genphy_resume, + .driver = { .owner = THIS_MODULE,}, +} }; + +static int __init lantiqphy_init(void) +{ + return phy_drivers_register(lantiqphy_driver, + ARRAY_SIZE(lantiqphy_driver)); +} + +static void __exit lantiqphy_exit(void) +{ + phy_drivers_unregister(lantiqphy_driver, + ARRAY_SIZE(lantiqphy_driver)); +} + +module_init(lantiqphy_init); +module_exit(lantiqphy_exit); + +MODULE_DESCRIPTION("Lantiq PHY driver"); +MODULE_AUTHOR("Alexander Stein <alexander.stein@systec-electronic.com>"); +MODULE_LICENSE("GPL"); + +static struct mdio_device_id __maybe_unused lantiq_tbl[] = { + { PHY_ID_PEF7071, 0x00fffffe }, + { } +}; +MODULE_DEVICE_TABLE(mdio, lantiq_tbl); -- 2.7.3
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