[net-next,v5,5/5] net: phy: add driver for built-in 2.5G ethernet PHY on MT7988

Message ID	20240530034844.11176-6-SkyLake.Huang@mediatek.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org> From: Sky Huang <SkyLake.Huang@mediatek.com> To: Andrew Lunn <andrew@lunn.ch>, Heiner Kallweit <hkallweit1@gmail.com>, Russell King <linux@armlinux.org.uk>, "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Daniel Golle <daniel@makrotopia.org>, Qingfang Deng <dqfext@gmail.com>, SkyLake Huang <SkyLake.Huang@mediatek.com>, Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, <linux-kernel@vger.kernel.org>, <netdev@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-mediatek@lists.infradead.org> CC: Steven Liu <Steven.Liu@mediatek.com>, SkyLake.Huang <skylake.huang@mediatek.com> Subject: [PATCH net-next v5 5/5] net: phy: add driver for built-in 2.5G ethernet PHY on MT7988 Date: Thu, 30 May 2024 11:48:44 +0800 Message-ID: <20240530034844.11176-6-SkyLake.Huang@mediatek.com> In-Reply-To: <20240530034844.11176-1-SkyLake.Huang@mediatek.com> References: <20240530034844.11176-1-SkyLake.Huang@mediatek.com> MIME-Version: 1.0 Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org
Series	net: phy: mediatek: Introduce mtk-phy-lib and add 2.5Gphy support \| expand [net-next,v5,0/5] net: phy: mediatek: Introduce mtk-phy-lib and add 2.5Gphy support [net-next,v5,1/5] net: phy: mediatek: Re-organize MediaTek ethernet phy drivers [net-next,v5,2/5] net: phy: mediatek: Move LED and read/write page helper functions into mtk phy lib [net-next,v5,3/5] net: phy: mediatek: Add token ring access helper functions in mtk-phy-lib [net-next,v5,4/5] net: phy: mediatek: Extend 1G TX/RX link pulse time [net-next,v5,5/5] net: phy: add driver for built-in 2.5G ethernet PHY on MT7988

diff --git a/MAINTAINERS b/MAINTAINERS index e58e05c..fe380f2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13793,6 +13793,7 @@ M: Qingfang Deng <dqfext@gmail.com> M: SkyLake Huang <SkyLake.Huang@mediatek.com> L: netdev@vger.kernel.org S: Maintained +F: drivers/net/phy/mediatek/mtk-2p5ge.c F: drivers/net/phy/mediatek/mtk-ge-soc.c F: drivers/net/phy/mediatek/mtk-phy-lib.c F: drivers/net/phy/mediatek/mtk-ge.c diff --git a/drivers/net/phy/mediatek/Kconfig b/drivers/net/phy/mediatek/Kconfig index 448bc20..1490352 100644 --- a/drivers/net/phy/mediatek/Kconfig +++ b/drivers/net/phy/mediatek/Kconfig @@ -25,3 +25,14 @@ config MEDIATEK_GE_SOC_PHY the MT7981 and MT7988 SoCs. These PHYs need calibration data present in the SoCs efuse and will dynamically calibrate VCM (common-mode voltage) during startup. + +config MEDIATEK_2P5GE_PHY + tristate "MediaTek 2.5Gb Ethernet PHYs" + depends on (ARM64 && ARCH_MEDIATEK) || COMPILE_TEST + select MTK_NET_PHYLIB + help + Supports MediaTek SoC built-in 2.5Gb Ethernet PHYs. + + This will load necessary firmware and add appropriate time delay. + Accelerate this procedure through internal pbus instead of MDIO + bus. Certain link-up issues will also be fixed here. diff --git a/drivers/net/phy/mediatek/Makefile b/drivers/net/phy/mediatek/Makefile index 814879d..c6db8ab 100644 --- a/drivers/net/phy/mediatek/Makefile +++ b/drivers/net/phy/mediatek/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_MTK_NET_PHYLIB) += mtk-phy-lib.o obj-$(CONFIG_MEDIATEK_GE_PHY) += mtk-ge.o obj-$(CONFIG_MEDIATEK_GE_SOC_PHY) += mtk-ge-soc.o +obj-$(CONFIG_MEDIATEK_2P5GE_PHY) += mtk-2p5ge.o diff --git a/drivers/net/phy/mediatek/mtk-2p5ge.c b/drivers/net/phy/mediatek/mtk-2p5ge.c new file mode 100644 index 0000000..33d1c8d --- /dev/null +++ b/drivers/net/phy/mediatek/mtk-2p5ge.c @@ -0,0 +1,422 @@ +// SPDX-License-Identifier: GPL-2.0+ +#include <linux/bitfield.h> +#include <linux/firmware.h> +#include <linux/module.h> +#include <linux/nvmem-consumer.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/pinctrl/consumer.h> +#include <linux/phy.h> +#include <linux/pm_domain.h> +#include <linux/pm_runtime.h> + +#include "mtk.h" + +#define MTK_2P5GPHY_ID_MT7988 (0x00339c11) + +#define MT7988_2P5GE_PMB "mediatek/mt7988/i2p5ge-phy-pmb.bin" +#define MT7988_2P5GE_PMB_SIZE (0x20000) +#define MT7988_2P5GE_PMB_BASE (0x0f100000) +#define MT7988_2P5GE_PMB_LEN (0x20000) +#define MT7988_2P5GE_MD32_EN_CFG_BASE (0x0f0f0018) +#define MT7988_2P5GE_MD32_EN_CFG_LEN (0x20) +#define MD32_EN BIT(0) + +#define BASE100T_STATUS_EXTEND (0x10) +#define BASE1000T_STATUS_EXTEND (0x11) +#define EXTEND_CTRL_AND_STATUS (0x16) + +#define PHY_AUX_CTRL_STATUS (0x1d) +#define PHY_AUX_DPX_MASK GENMASK(5, 5) +#define PHY_AUX_SPEED_MASK GENMASK(4, 2) + +#define MTK_PHY_LPI_PCS_DSP_CTRL (0x121) +#define MTK_PHY_LPI_SIG_EN_LO_THRESH100_MASK GENMASK(12, 8) + +/* Registers on MTK phy page 1*/ +#define MTK_PHY_PAGE_EXTENDED_1 0x0001 +#define MTK_PHY_AUX_CTRL_AND_STATUS (0x14) +#define MTK_PHY_ENABLE_DOWNSHIFT BIT(4) + +/* Registers on Token Ring debug nodes */ +/* ch_addr = 0x0, node_addr = 0xf, data_addr = 0x3c */ +#define AUTO_NP_10XEN BIT(6) + +struct mtk_i2p5ge_phy_priv { + bool fw_loaded; + unsigned long led_state; +}; + +enum { + PHY_AUX_SPD_10 = 0, + PHY_AUX_SPD_100, + PHY_AUX_SPD_1000, + PHY_AUX_SPD_2500, +}; + +static int mt798x_2p5ge_phy_load_fw(struct phy_device *phydev) +{ + struct mtk_i2p5ge_phy_priv *priv = phydev->priv; + void __iomem *md32_en_cfg_base, *pmb_addr; + struct device *dev = &phydev->mdio.dev; + const struct firmware *fw; + int ret, i; + u16 reg; + + if (priv->fw_loaded) + return 0; + + pmb_addr = ioremap(MT7988_2P5GE_PMB_BASE, MT7988_2P5GE_PMB_LEN); + if (!pmb_addr) + return -ENOMEM; + md32_en_cfg_base = ioremap(MT7988_2P5GE_MD32_EN_CFG_BASE, MT7988_2P5GE_MD32_EN_CFG_LEN); + if (!md32_en_cfg_base) { + ret = -ENOMEM; + goto free_pmb; + } + + ret = request_firmware(&fw, MT7988_2P5GE_PMB, dev); + if (ret) { + dev_err(dev, "failed to load firmware: %s, ret: %d\n", + MT7988_2P5GE_PMB, ret); + goto free; + } + + if (fw->size != MT7988_2P5GE_PMB_SIZE) { + dev_err(dev, "Firmware size 0x%zx != 0x%x\n", + fw->size, MT7988_2P5GE_PMB_SIZE); + ret = -EINVAL; + goto free; + } + + reg = readw(md32_en_cfg_base); + if (reg & MD32_EN) { + phy_set_bits(phydev, MII_BMCR, BMCR_RESET); + usleep_range(10000, 11000); + } + phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); + + /* Write magic number to safely stall MCU */ + phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x800e, 0x1100); + phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x800f, 0x00df); + + for (i = 0; i < MT7988_2P5GE_PMB_SIZE - 1; i += 4) + writel(*((uint32_t *)(fw->data + i)), pmb_addr + i); + release_firmware(fw); + dev_info(dev, "Firmware date code: %x/%x/%x, version: %x.%x\n", + be16_to_cpu(*((uint16_t *)(fw->data + MT7988_2P5GE_PMB_SIZE - 8))), + *(fw->data + MT7988_2P5GE_PMB_SIZE - 6), + *(fw->data + MT7988_2P5GE_PMB_SIZE - 5), + *(fw->data + MT7988_2P5GE_PMB_SIZE - 2), + *(fw->data + MT7988_2P5GE_PMB_SIZE - 1)); + + writew(reg & ~MD32_EN, md32_en_cfg_base); + writew(reg | MD32_EN, md32_en_cfg_base); + phy_set_bits(phydev, MII_BMCR, BMCR_RESET); + /* We need a delay here to stabilize initialization of MCU */ + usleep_range(7000, 8000); + dev_info(dev, "Firmware loading/trigger ok.\n"); + + priv->fw_loaded = true; + +free: + iounmap(md32_en_cfg_base); +free_pmb: + iounmap(pmb_addr); + + return ret ? ret : 0; +} + +static int mt798x_2p5ge_phy_config_init(struct phy_device *phydev) +{ + struct pinctrl *pinctrl; + int ret; + + ret = mt798x_2p5ge_phy_load_fw(phydev); + if (ret < 0) + return ret; + + /* Setup LED */ + phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, MTK_PHY_LED0_ON_CTRL, + MTK_PHY_LED_ON_POLARITY | MTK_PHY_LED_ON_LINK10 | + MTK_PHY_LED_ON_LINK100 | MTK_PHY_LED_ON_LINK1000 | + MTK_PHY_LED_ON_LINK2500); + phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, MTK_PHY_LED1_ON_CTRL, + MTK_PHY_LED_ON_FDX | MTK_PHY_LED_ON_HDX); + + /* Switch pinctrl after setting polarity to avoid bogus blinking */ + pinctrl = devm_pinctrl_get_select(&phydev->mdio.dev, "i2p5gbe-led"); + if (IS_ERR(pinctrl)) + dev_err(&phydev->mdio.dev, "Fail to set LED pins!\n"); + + phy_modify_mmd(phydev, MDIO_MMD_VEND1, MTK_PHY_LPI_PCS_DSP_CTRL, + MTK_PHY_LPI_SIG_EN_LO_THRESH100_MASK, 0); + + /* Enable 16-bit next page exchange bit if 1000-BT isn't advertising */ + tr_modify(phydev, 0x0, 0xf, 0x3c, AUTO_NP_10XEN, + FIELD_PREP(AUTO_NP_10XEN, 0x1)); + + /* Enable HW auto downshift */ + phy_modify_paged(phydev, MTK_PHY_PAGE_EXTENDED_1, MTK_PHY_AUX_CTRL_AND_STATUS, + 0, MTK_PHY_ENABLE_DOWNSHIFT); + + return 0; +} + +static int mt798x_2p5ge_phy_config_aneg(struct phy_device *phydev) +{ + bool changed = false; + u32 adv; + int ret; + + /* In fact, if we disable autoneg, we can't link up correctly: + * 2.5G/1G: Need AN to exchange master/slave information. + * 100M: Without AN, link starts at half duplex(According to IEEE 802.3-2018), + * which this phy doesn't support. + * 10M: Deprecated in this ethernet phy. + */ + if (phydev->autoneg == AUTONEG_DISABLE) + return -EOPNOTSUPP; + + ret = genphy_c45_an_config_aneg(phydev); + if (ret < 0) + return ret; + if (ret > 0) + changed = true; + + /* Clause 45 doesn't define 1000BaseT support. Use Clause 22 instead in our design. + */ + adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising); + ret = phy_modify_changed(phydev, MII_CTRL1000, ADVERTISE_1000FULL, adv); + if (ret < 0) + return ret; + if (ret > 0) + changed = true; + + return genphy_c45_check_and_restart_aneg(phydev, changed); +} + +static int mt798x_2p5ge_phy_get_features(struct phy_device *phydev) +{ + int ret; + + ret = genphy_c45_pma_read_abilities(phydev); + if (ret) + return ret; + + /* This phy can't handle collision, and neither can (XFI)MAC it's connected to. + * Although it can do HDX handshake, it doesn't support CSMA/CD that HDX requires. + */ + linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported); + + return 0; +} + +static int mt798x_2p5ge_phy_read_status(struct phy_device *phydev) +{ + int ret; + + /* When MDIO_STAT1_LSTATUS is raised genphy_c45_read_link(), this phy actually + * hasn't finished AN. So use CL22's link update function instead. + */ + ret = genphy_update_link(phydev); + if (ret) + return ret; + + phydev->speed = SPEED_UNKNOWN; + phydev->duplex = DUPLEX_UNKNOWN; + phydev->pause = 0; + phydev->asym_pause = 0; + + /* We'll read link speed through vendor specific registers down below. So remove + * phy_resolve_aneg_linkmode (AN on) & genphy_c45_read_pma (AN off). + */ + if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { + ret = genphy_c45_read_lpa(phydev); + if (ret < 0) + return ret; + + /* Clause 45 doesn't define 1000BaseT support. Read the link partner's 1G + * advertisement via Clause 22 + */ + ret = phy_read(phydev, MII_STAT1000); + if (ret < 0) + return ret; + mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, ret); + } else if (phydev->autoneg == AUTONEG_DISABLE) { + linkmode_zero(phydev->lp_advertising); + } + + if (phydev->link) { + ret = phy_read(phydev, PHY_AUX_CTRL_STATUS); + if (ret < 0) + return ret; + + switch (FIELD_GET(PHY_AUX_SPEED_MASK, ret)) { + case PHY_AUX_SPD_10: + phydev->speed = SPEED_10; + break; + case PHY_AUX_SPD_100: + phydev->speed = SPEED_100; + break; + case PHY_AUX_SPD_1000: + phydev->speed = SPEED_1000; + break; + case PHY_AUX_SPD_2500: + phydev->speed = SPEED_2500; + break; + } + + phydev->duplex = DUPLEX_FULL; + /* FIXME: The current firmware always enables rate adaptation mode. */ + phydev->rate_matching = RATE_MATCH_PAUSE; + } + + return 0; +} + +static int mt798x_2p5ge_phy_get_rate_matching(struct phy_device *phydev, + phy_interface_t iface) +{ + if (iface == PHY_INTERFACE_MODE_XGMII) + return RATE_MATCH_PAUSE; + return RATE_MATCH_NONE; +} + +static const unsigned long supported_triggers = (BIT(TRIGGER_NETDEV_FULL_DUPLEX) | + BIT(TRIGGER_NETDEV_LINK) | + BIT(TRIGGER_NETDEV_LINK_10) | + BIT(TRIGGER_NETDEV_LINK_100) | + BIT(TRIGGER_NETDEV_LINK_1000) | + BIT(TRIGGER_NETDEV_LINK_2500) | + BIT(TRIGGER_NETDEV_RX) | + BIT(TRIGGER_NETDEV_TX)); + +static int mt798x_2p5ge_phy_led_blink_set(struct phy_device *phydev, u8 index, + unsigned long *delay_on, + unsigned long *delay_off) +{ + bool blinking = false; + int err = 0; + struct mtk_i2p5ge_phy_priv *priv = phydev->priv; + + if (index > 1) + return -EINVAL; + + if (delay_on && delay_off && (*delay_on > 0) && (*delay_off > 0)) { + blinking = true; + *delay_on = 50; + *delay_off = 50; + } + + err = mtk_phy_hw_led_blink_set(phydev, index, &priv->led_state, blinking); + if (err) + return err; + + return mtk_phy_hw_led_on_set(phydev, index, &priv->led_state, + MTK_2P5GPHY_LED_ON_MASK, false); +} + +static int mt798x_2p5ge_phy_led_brightness_set(struct phy_device *phydev, + u8 index, enum led_brightness value) +{ + int err; + struct mtk_i2p5ge_phy_priv *priv = phydev->priv; + + err = mtk_phy_hw_led_blink_set(phydev, index, &priv->led_state, false); + if (err) + return err; + + return mtk_phy_hw_led_on_set(phydev, index, &priv->led_state, + MTK_2P5GPHY_LED_ON_MASK, (value != LED_OFF)); +} + +static int mt798x_2p5ge_phy_led_hw_is_supported(struct phy_device *phydev, u8 index, + unsigned long rules) +{ + return mtk_phy_led_hw_is_supported(phydev, index, rules, supported_triggers); +} + +static int mt798x_2p5ge_phy_led_hw_control_get(struct phy_device *phydev, u8 index, + unsigned long *rules) +{ + struct mtk_i2p5ge_phy_priv *priv = phydev->priv; + + return mtk_phy_led_hw_ctrl_get(phydev, index, rules, &priv->led_state, + MTK_2P5GPHY_LED_ON_SET, + MTK_2P5GPHY_LED_RX_BLINK_SET, + MTK_2P5GPHY_LED_TX_BLINK_SET); +}; + +static int mt798x_2p5ge_phy_led_hw_control_set(struct phy_device *phydev, u8 index, + unsigned long rules) +{ + struct mtk_i2p5ge_phy_priv *priv = phydev->priv; + + return mtk_phy_led_hw_ctrl_set(phydev, index, rules, &priv->led_state, + MTK_2P5GPHY_LED_ON_SET, + MTK_2P5GPHY_LED_RX_BLINK_SET, + MTK_2P5GPHY_LED_TX_BLINK_SET); +}; + +static int mt798x_2p5ge_phy_probe(struct phy_device *phydev) +{ + struct mtk_i2p5ge_phy_priv *priv; + + priv = devm_kzalloc(&phydev->mdio.dev, + sizeof(struct mtk_i2p5ge_phy_priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + switch (phydev->drv->phy_id) { + case MTK_2P5GPHY_ID_MT7988: + /* The original hardware only sets MDIO_DEVS_PMAPMD */ + phydev->c45_ids.mmds_present |= (MDIO_DEVS_PCS | MDIO_DEVS_AN | + MDIO_DEVS_VEND1 | MDIO_DEVS_VEND2); + break; + default: + return -EINVAL; + } + + priv->fw_loaded = false; + phydev->priv = priv; + + mtk_phy_leds_state_init(phydev); + + return 0; +} + +static struct phy_driver mtk_gephy_driver[] = { + { + PHY_ID_MATCH_MODEL(MTK_2P5GPHY_ID_MT7988), + .name = "MediaTek MT7988 2.5GbE PHY", + .probe = mt798x_2p5ge_phy_probe, + .config_init = mt798x_2p5ge_phy_config_init, + .config_aneg = mt798x_2p5ge_phy_config_aneg, + .get_features = mt798x_2p5ge_phy_get_features, + .read_status = mt798x_2p5ge_phy_read_status, + .get_rate_matching = mt798x_2p5ge_phy_get_rate_matching, + .suspend = genphy_suspend, + .resume = genphy_resume, + .read_page = mtk_phy_read_page, + .write_page = mtk_phy_write_page, + .led_blink_set = mt798x_2p5ge_phy_led_blink_set, + .led_brightness_set = mt798x_2p5ge_phy_led_brightness_set, + .led_hw_is_supported = mt798x_2p5ge_phy_led_hw_is_supported, + .led_hw_control_get = mt798x_2p5ge_phy_led_hw_control_get, + .led_hw_control_set = mt798x_2p5ge_phy_led_hw_control_set, + }, +}; + +module_phy_driver(mtk_gephy_driver); + +static struct mdio_device_id __maybe_unused mtk_2p5ge_phy_tbl[] = { + { PHY_ID_MATCH_VENDOR(0x00339c00) }, + { } +}; + +MODULE_DESCRIPTION("MediaTek 2.5Gb Ethernet PHY driver"); +MODULE_AUTHOR("SkyLake Huang <SkyLake.Huang@mediatek.com>"); +MODULE_LICENSE("GPL"); + +MODULE_DEVICE_TABLE(mdio, mtk_2p5ge_phy_tbl);

[net-next,v5,5/5] net: phy: add driver for built-in 2.5G ethernet PHY on MT7988

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