From: Yegor Yefremov <[email protected]> The driver corresponds to the kernel 6.1.27.
Signed-off-by: Yegor Yefremov <[email protected]> --- Changes: v1 -> v2: add the related kernel version drivers/net/phy/Kconfig | 5 ++ drivers/net/phy/Makefile | 1 + drivers/net/phy/motorcomm.c | 128 ++++++++++++++++++++++++++++++++++++ 3 files changed, 134 insertions(+) create mode 100644 drivers/net/phy/motorcomm.c diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index cd20e1de27..e95e2a3228 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -50,6 +50,11 @@ config MICREL_PHY help Supports the KSZ9021, VSC8201, KS8001 PHYs. +config MOTORCOMM_PHY + bool "Driver for Motorcomm PHYs" + help + Currently supports the YT8511 PHY. + config NATIONAL_PHY bool "Driver for National Semiconductor PHYs" help diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 83f46f11d3..26e4ad884d 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_DAVICOM_PHY) += davicom.o obj-$(CONFIG_LXT_PHY) += lxt.o obj-$(CONFIG_MARVELL_PHY) += marvell.o obj-$(CONFIG_MICREL_PHY) += micrel.o +obj-$(CONFIG_MOTORCOMM_PHY) += motorcomm.o obj-$(CONFIG_NATIONAL_PHY) += national.o obj-$(CONFIG_REALTEK_PHY) += realtek.o obj-$(CONFIG_SMSC_PHY) += smsc.o diff --git a/drivers/net/phy/motorcomm.c b/drivers/net/phy/motorcomm.c new file mode 100644 index 0000000000..4bcd84342c --- /dev/null +++ b/drivers/net/phy/motorcomm.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * drivers/net/phy/motorcomm.c + * + * Driver for Motorcomm PHYs + * + * Author: Peter Geis <[email protected]> + */ + +#include <common.h> +#include <init.h> +#include <linux/phy.h> +#include <linux/mdio.h> + +#define PHY_ID_YT8511 0x0000010a + +#define YT8511_PAGE_SELECT 0x1e +#define YT8511_PAGE 0x1f +#define YT8511_EXT_CLK_GATE 0x0c +#define YT8511_EXT_DELAY_DRIVE 0x0d +#define YT8511_EXT_SLEEP_CTRL 0x27 + +/* 2b00 25m from pll + * 2b01 25m from xtl *default* + * 2b10 62.m from pll + * 2b11 125m from pll + */ +#define YT8511_CLK_125M (BIT(2) | BIT(1)) +#define YT8511_PLLON_SLP BIT(14) + +/* RX Delay enabled = 1.8ns 1000T, 8ns 10/100T */ +#define YT8511_DELAY_RX BIT(0) + +/* TX Gig-E Delay is bits 7:4, default 0x5 + * TX Fast-E Delay is bits 15:12, default 0xf + * Delay = 150ps * N - 250ps + * On = 2000ps, off = 50ps + */ +#define YT8511_DELAY_GE_TX_EN (0xf << 4) +#define YT8511_DELAY_GE_TX_DIS (0x2 << 4) +#define YT8511_DELAY_FE_TX_EN (0xf << 12) +#define YT8511_DELAY_FE_TX_DIS (0x2 << 12) + +static int yt8511_read_page(struct phy_device *phydev) +{ + return phy_read(phydev, YT8511_PAGE_SELECT); +}; + +static int yt8511_write_page(struct phy_device *phydev, int page) +{ + return phy_write(phydev, YT8511_PAGE_SELECT, page); +}; + +static int yt8511_config_init(struct phy_device *phydev) +{ + int oldpage, ret = 0; + unsigned int ge, fe; + + oldpage = phy_select_page(phydev, YT8511_EXT_CLK_GATE); + if (oldpage < 0) + goto err_restore_page; + + /* set rgmii delay mode */ + switch (phydev->interface) { + case PHY_INTERFACE_MODE_RGMII: + ge = YT8511_DELAY_GE_TX_DIS; + fe = YT8511_DELAY_FE_TX_DIS; + break; + case PHY_INTERFACE_MODE_RGMII_RXID: + ge = YT8511_DELAY_RX | YT8511_DELAY_GE_TX_DIS; + fe = YT8511_DELAY_FE_TX_DIS; + break; + case PHY_INTERFACE_MODE_RGMII_TXID: + ge = YT8511_DELAY_GE_TX_EN; + fe = YT8511_DELAY_FE_TX_EN; + break; + case PHY_INTERFACE_MODE_RGMII_ID: + ge = YT8511_DELAY_RX | YT8511_DELAY_GE_TX_EN; + fe = YT8511_DELAY_FE_TX_EN; + break; + default: /* do not support other modes */ + ret = -EOPNOTSUPP; + goto err_restore_page; + } + + ret = phy_modify(phydev, YT8511_PAGE, (YT8511_DELAY_RX | YT8511_DELAY_GE_TX_EN), ge); + if (ret < 0) + goto err_restore_page; + + /* set clock mode to 125mhz */ + ret = phy_modify(phydev, YT8511_PAGE, 0, YT8511_CLK_125M); + if (ret < 0) + goto err_restore_page; + + /* fast ethernet delay is in a separate page */ + ret = phy_write(phydev, YT8511_PAGE_SELECT, YT8511_EXT_DELAY_DRIVE); + if (ret < 0) + goto err_restore_page; + + ret = phy_modify(phydev, YT8511_PAGE, YT8511_DELAY_FE_TX_EN, fe); + if (ret < 0) + goto err_restore_page; + + /* leave pll enabled in sleep */ + ret = phy_write(phydev, YT8511_PAGE_SELECT, YT8511_EXT_SLEEP_CTRL); + if (ret < 0) + goto err_restore_page; + + ret = phy_modify(phydev, YT8511_PAGE, 0, YT8511_PLLON_SLP); + if (ret < 0) + goto err_restore_page; + +err_restore_page: + return phy_restore_page(phydev, oldpage, ret); +} + +static struct phy_driver motorcomm_phy_drvs[] = { + { + .phy_id = PHY_ID_YT8511, + .drv.name = "YT8511 Gigabit Ethernet", + .config_init = yt8511_config_init, + .features = PHY_GBIT_FEATURES, + .read_page = yt8511_read_page, + .write_page = yt8511_write_page, + }, +}; + +device_phy_drivers(motorcomm_phy_drvs); -- 2.34.1
