| Message ID | 0b112d39251b35b5d7975833ad6b4ab4717c029a.1699565880.git.daniel@makrotopia.org (mailing list archive) |
|---|---|
| State | RFC |
| Headers | show |
| Series | Add support for 10G Ethernet SerDes on MT7988 | expand |
On 09-11-23, 21:51, Daniel Golle wrote: > Add driver for MediaTek's pextp 10 Gigabit/s Ethernet SerDes PHY which > can be found in the MT7988 SoC. > > The PHY can operates only in PHY_MODE_ETHERNET, the submode is one of > PHY_INTERFACE_MODE_* corresponding to the supported modes: > > * USXGMII > * 10GBase-R > * 5GBase-R > * 2500Base-X > * 1000Base-X > * Cisco SGMII (MAC side) > > In order to work-around a performance issue present on the first of > two PEXTP present in MT7988 special tuning is applied which can be > selected by adding the mediatek,usxgmii-performance-errata property to > the device tree node. > > There is no documentation what-so-ever for the pextp registers and > this driver is based on a GPL licensed implementation found in > MediaTek's SDK. > > Signed-off-by: Daniel Golle <daniel@makrotopia.org> > --- > MAINTAINERS | 1 + > drivers/phy/mediatek/Kconfig | 11 + > drivers/phy/mediatek/Makefile | 1 + > drivers/phy/mediatek/phy-mtk-pextp.c | 355 +++++++++++++++++++++++++++ > 4 files changed, 368 insertions(+) > create mode 100644 drivers/phy/mediatek/phy-mtk-pextp.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 7b151710e8c58..6499acd8f3874 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -13527,6 +13527,7 @@ L: netdev@vger.kernel.org > S: Maintained > F: drivers/net/phy/mediatek-ge-soc.c > F: drivers/net/phy/mediatek-ge.c > +F: drivers/phy/mediatek/phy-mediatek-pextp.c > > MEDIATEK I2C CONTROLLER DRIVER > M: Qii Wang <qii.wang@mediatek.com> > diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig > index 3125ecb5d119f..a7749a6d96541 100644 > --- a/drivers/phy/mediatek/Kconfig > +++ b/drivers/phy/mediatek/Kconfig > @@ -13,6 +13,17 @@ config PHY_MTK_PCIE > callback for PCIe GEN3 port, it supports software efuse > initialization. > > +config PHY_MTK_PEXTP > + tristate "MediaTek PEXTP Driver" > + depends on ARCH_MEDIATEK || COMPILE_TEST > + depends on OF && OF_ADDRESS > + depends on HAS_IOMEM > + select GENERIC_PHY > + help > + Say 'Y' here to add support for MediaTek pextp PHY driver. > + The driver provides access to the Ethernet SerDes PHY supporting > + various 1GE, 2.5GE, 5GE and 10GE modes. > + > config PHY_MTK_TPHY > tristate "MediaTek T-PHY Driver" > depends on ARCH_MEDIATEK || COMPILE_TEST > diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile > index c9a50395533eb..ca60c7b9b02ac 100644 > --- a/drivers/phy/mediatek/Makefile > +++ b/drivers/phy/mediatek/Makefile > @@ -8,6 +8,7 @@ obj-$(CONFIG_PHY_MTK_PCIE) += phy-mtk-pcie.o > obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o > obj-$(CONFIG_PHY_MTK_UFS) += phy-mtk-ufs.o > obj-$(CONFIG_PHY_MTK_XSPHY) += phy-mtk-xsphy.o > +obj-$(CONFIG_PHY_MTK_PEXTP) += phy-mtk-pextp.o > > phy-mtk-hdmi-drv-y := phy-mtk-hdmi.o > phy-mtk-hdmi-drv-y += phy-mtk-hdmi-mt2701.o > diff --git a/drivers/phy/mediatek/phy-mtk-pextp.c b/drivers/phy/mediatek/phy-mtk-pextp.c > new file mode 100644 > index 0000000000000..272bff4f37a96 > --- /dev/null > +++ b/drivers/phy/mediatek/phy-mtk-pextp.c > @@ -0,0 +1,355 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* MediaTek 10GE SerDes PHY driver > + * > + * Copyright (c) 2023 Daniel Golle <daniel@makrotopia.org> > + * based on mtk_usxgmii.c found in MediaTek's SDK released under GPL-2.0 > + * Copyright (c) 2022 MediaTek Inc. > + * Author: Henry Yen <henry.yen@mediatek.com> > + */ > + > +#include <linux/module.h> > +#include <linux/device.h> > +#include <linux/netdevice.h> > +#include <linux/platform_device.h> > +#include <linux/of.h> > +#include <linux/io.h> > +#include <linux/clk.h> > +#include <linux/reset.h> > +#include <linux/phy.h> > +#include <linux/phy/phy.h> > + > +struct mtk_pextp_phy { > + void __iomem *base; > + struct device *dev; > + struct reset_control *reset; > + struct clk *clk; > + bool da_war; > +}; > + > +static inline bool mtk_interface_mode_is_xgmii(phy_interface_t interface) > +{ > + switch (interface) { > + case PHY_INTERFACE_MODE_INTERNAL: > + case PHY_INTERFACE_MODE_USXGMII: > + case PHY_INTERFACE_MODE_10GBASER: > + case PHY_INTERFACE_MODE_5GBASER: > + return true; > + default: > + return false; > + } > +} > + > +static void mtk_pextp_setup(struct mtk_pextp_phy *pextp, phy_interface_t interface) > +{ > + bool is_10g = (interface == PHY_INTERFACE_MODE_10GBASER || > + interface == PHY_INTERFACE_MODE_USXGMII); > + bool is_2p5g = (interface == PHY_INTERFACE_MODE_2500BASEX); > + bool is_5g = (interface == PHY_INTERFACE_MODE_5GBASER); > + > + dev_dbg(pextp->dev, "setting up for mode %s\n", phy_modes(interface)); > + > + /* Setup operation mode */ > + if (is_10g) > + iowrite32(0x00C9071C, pextp->base + 0x9024); what are these magic numbers? also lower case hex values pls > + else > + iowrite32(0x00D9071C, pextp->base + 0x9024); > + > + if (is_5g) > + iowrite32(0xAAA5A5AA, pextp->base + 0x2020); > + else > + iowrite32(0xAA8585AA, pextp->base + 0x2020); > + > + if (is_2p5g || is_5g || is_10g) { > + iowrite32(0x0C020707, pextp->base + 0x2030); > + iowrite32(0x0E050F0F, pextp->base + 0x2034); > + iowrite32(0x00140032, pextp->base + 0x2040); > + } else { > + iowrite32(0x0C020207, pextp->base + 0x2030); > + iowrite32(0x0E05050F, pextp->base + 0x2034); > + iowrite32(0x00200032, pextp->base + 0x2040); > + } > + > + if (is_2p5g || is_10g) > + iowrite32(0x00C014AA, pextp->base + 0x50F0); > + else if (is_5g) > + iowrite32(0x00C018AA, pextp->base + 0x50F0); > + else > + iowrite32(0x00C014BA, pextp->base + 0x50F0); > + > + if (is_5g) { > + iowrite32(0x3777812B, pextp->base + 0x50E0); > + iowrite32(0x005C9CFF, pextp->base + 0x506C); > + iowrite32(0x9DFAFAFA, pextp->base + 0x5070); > + iowrite32(0x273F3F3F, pextp->base + 0x5074); > + iowrite32(0xA8883868, pextp->base + 0x5078); > + iowrite32(0x14661466, pextp->base + 0x507C); > + } else { > + iowrite32(0x3777C12B, pextp->base + 0x50E0); > + iowrite32(0x005F9CFF, pextp->base + 0x506C); > + iowrite32(0x9D9DFAFA, pextp->base + 0x5070); > + iowrite32(0x27273F3F, pextp->base + 0x5074); > + iowrite32(0xA7883C68, pextp->base + 0x5078); > + iowrite32(0x11661166, pextp->base + 0x507C); > + } > + > + if (is_2p5g || is_10g) { > + iowrite32(0x0E000AAF, pextp->base + 0x5080); > + iowrite32(0x08080D0D, pextp->base + 0x5084); > + iowrite32(0x02030909, pextp->base + 0x5088); > + } else if (is_5g) { > + iowrite32(0x0E001ABF, pextp->base + 0x5080); > + iowrite32(0x080B0D0D, pextp->base + 0x5084); > + iowrite32(0x02050909, pextp->base + 0x5088); > + } else { > + iowrite32(0x0E000EAF, pextp->base + 0x5080); > + iowrite32(0x08080E0D, pextp->base + 0x5084); > + iowrite32(0x02030B09, pextp->base + 0x5088); > + } > + > + if (is_5g) { > + iowrite32(0x0C000000, pextp->base + 0x50E4); > + iowrite32(0x04000000, pextp->base + 0x50E8); > + } else { > + iowrite32(0x0C0C0000, pextp->base + 0x50E4); > + iowrite32(0x04040000, pextp->base + 0x50E8); > + } > + > + if (is_2p5g || mtk_interface_mode_is_xgmii(interface)) > + iowrite32(0x0F0F0C06, pextp->base + 0x50EC); > + else > + iowrite32(0x0F0F0606, pextp->base + 0x50EC); > + > + if (is_5g) { > + iowrite32(0x50808C8C, pextp->base + 0x50A8); > + iowrite32(0x18000000, pextp->base + 0x6004); > + } else { > + iowrite32(0x506E8C8C, pextp->base + 0x50A8); > + iowrite32(0x18190000, pextp->base + 0x6004); > + } > + > + if (is_10g) > + iowrite32(0x01423342, pextp->base + 0x00F8); > + else if (is_5g) > + iowrite32(0x00A132A1, pextp->base + 0x00F8); > + else if (is_2p5g) > + iowrite32(0x009C329C, pextp->base + 0x00F8); > + else > + iowrite32(0x00FA32FA, pextp->base + 0x00F8); > + > + /* Force SGDT_OUT off and select PCS */ > + if (mtk_interface_mode_is_xgmii(interface)) > + iowrite32(0x80201F20, pextp->base + 0x00F4); > + else > + iowrite32(0x80201F21, pextp->base + 0x00F4); > + > + /* Force GLB_CKDET_OUT */ > + iowrite32(0x00050C00, pextp->base + 0x0030); > + > + /* Force AEQ on */ > + iowrite32(0x02002800, pextp->base + 0x0070); > + ndelay(1020); > + > + /* Setup DA default value */ > + iowrite32(0x00000020, pextp->base + 0x30B0); > + iowrite32(0x00008A01, pextp->base + 0x3028); > + iowrite32(0x0000A884, pextp->base + 0x302C); > + iowrite32(0x00083002, pextp->base + 0x3024); > + if (mtk_interface_mode_is_xgmii(interface)) { > + iowrite32(0x00022220, pextp->base + 0x3010); > + iowrite32(0x0F020A01, pextp->base + 0x5064); > + iowrite32(0x06100600, pextp->base + 0x50B4); > + if (interface == PHY_INTERFACE_MODE_USXGMII) > + iowrite32(0x40704000, pextp->base + 0x3048); > + else > + iowrite32(0x47684100, pextp->base + 0x3048); > + } else { > + iowrite32(0x00011110, pextp->base + 0x3010); > + iowrite32(0x40704000, pextp->base + 0x3048); > + } > + > + if (!mtk_interface_mode_is_xgmii(interface) && !is_2p5g) > + iowrite32(0x0000C000, pextp->base + 0x3064); > + > + if (interface == PHY_INTERFACE_MODE_USXGMII) { > + iowrite32(0xA8000000, pextp->base + 0x3050); > + iowrite32(0x000000AA, pextp->base + 0x3054); > + } else if (mtk_interface_mode_is_xgmii(interface)) { > + iowrite32(0x00000000, pextp->base + 0x3050); > + iowrite32(0x00000000, pextp->base + 0x3054); > + } else { > + iowrite32(0xA8000000, pextp->base + 0x3050); > + iowrite32(0x000000AA, pextp->base + 0x3054); > + } > + > + if (mtk_interface_mode_is_xgmii(interface)) > + iowrite32(0x00000F00, pextp->base + 0x306C); > + else if (is_2p5g) > + iowrite32(0x22000F00, pextp->base + 0x306C); > + else > + iowrite32(0x20200F00, pextp->base + 0x306C); > + > + if (interface == PHY_INTERFACE_MODE_10GBASER && pextp->da_war) > + iowrite32(0x0007B400, pextp->base + 0xA008); > + > + if (mtk_interface_mode_is_xgmii(interface)) > + iowrite32(0x00040000, pextp->base + 0xA060); > + else > + iowrite32(0x00050000, pextp->base + 0xA060); > + > + if (is_10g) > + iowrite32(0x00000001, pextp->base + 0x90D0); > + else if (is_5g) > + iowrite32(0x00000003, pextp->base + 0x90D0); > + else if (is_2p5g) > + iowrite32(0x00000005, pextp->base + 0x90D0); > + else > + iowrite32(0x00000007, pextp->base + 0x90D0); > + > + /* Release reset */ > + iowrite32(0x0200E800, pextp->base + 0x0070); > + usleep_range(150, 500); > + > + /* Switch to P0 */ > + iowrite32(0x0200C111, pextp->base + 0x0070); > + ndelay(1020); > + iowrite32(0x0200C101, pextp->base + 0x0070); > + usleep_range(15, 50); > + > + if (mtk_interface_mode_is_xgmii(interface)) { > + /* Switch to Gen3 */ > + iowrite32(0x0202C111, pextp->base + 0x0070); > + } else { > + /* Switch to Gen2 */ > + iowrite32(0x0201C111, pextp->base + 0x0070); > + } > + ndelay(1020); > + if (mtk_interface_mode_is_xgmii(interface)) > + iowrite32(0x0202C101, pextp->base + 0x0070); > + else > + iowrite32(0x0201C101, pextp->base + 0x0070); > + usleep_range(100, 500); > + iowrite32(0x00000030, pextp->base + 0x30B0); > + if (mtk_interface_mode_is_xgmii(interface)) > + iowrite32(0x80201F00, pextp->base + 0x00F4); > + else > + iowrite32(0x80201F01, pextp->base + 0x00F4); > + > + iowrite32(0x30000000, pextp->base + 0x3040); > + usleep_range(400, 1000); > +} > + > +static int mtk_pextp_set_mode(struct phy *phy, enum phy_mode mode, int submode) > +{ > + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); > + > + if (mode != PHY_MODE_ETHERNET) > + return -EINVAL; > + > + switch (submode) { > + case PHY_INTERFACE_MODE_1000BASEX: > + case PHY_INTERFACE_MODE_2500BASEX: > + case PHY_INTERFACE_MODE_SGMII: > + case PHY_INTERFACE_MODE_5GBASER: > + case PHY_INTERFACE_MODE_10GBASER: > + case PHY_INTERFACE_MODE_USXGMII: > + mtk_pextp_setup(pextp, submode); > + return 0; > + default: > + return -EINVAL; > + } > +} > + > +static int mtk_pextp_reset(struct phy *phy) > +{ > + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); > + > + reset_control_assert(pextp->reset); > + usleep_range(100, 500); > + reset_control_deassert(pextp->reset); > + mdelay(10); > + > + return 0; > +} > + > +static int mtk_pextp_power_on(struct phy *phy) > +{ > + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); > + > + return clk_prepare_enable(pextp->clk); > +} > + > +static int mtk_pextp_power_off(struct phy *phy) > +{ > + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); > + > + clk_disable_unprepare(pextp->clk); > + > + return 0; > +} > + > +static const struct phy_ops mtk_pextp_ops = { > + .power_on = mtk_pextp_power_on, > + .power_off = mtk_pextp_power_off, > + .set_mode = mtk_pextp_set_mode, > + .reset = mtk_pextp_reset, > + .owner = THIS_MODULE, > +}; > + > +static int mtk_pextp_probe(struct platform_device *pdev) > +{ > + struct device_node *np = pdev->dev.of_node; > + struct phy_provider *phy_provider; > + struct mtk_pextp_phy *pextp; > + struct phy *phy; > + > + if (!np) > + return -ENODEV; > + > + pextp = devm_kzalloc(&pdev->dev, sizeof(*pextp), GFP_KERNEL); > + if (!pextp) > + return -ENOMEM; > + > + pextp->base = devm_of_iomap(&pdev->dev, np, 0, NULL); > + if (!pextp->base) > + return -EIO; > + > + pextp->dev = &pdev->dev; > + pextp->clk = devm_clk_get(&pdev->dev, NULL); > + if (IS_ERR(pextp->clk)) > + return PTR_ERR(pextp->clk); > + > + pextp->reset = devm_reset_control_get_exclusive(&pdev->dev, NULL); > + if (IS_ERR(pextp->reset)) > + return PTR_ERR(pextp->reset); > + > + pextp->da_war = of_property_read_bool(np, "mediatek,usxgmii-performance-errata"); > + > + phy = devm_phy_create(&pdev->dev, NULL, &mtk_pextp_ops); > + if (IS_ERR(phy)) > + return PTR_ERR(phy); > + > + phy_set_drvdata(phy, pextp); > + > + phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate); > + > + return PTR_ERR_OR_ZERO(phy_provider); > +} > + > +static const struct of_device_id mtk_pextp_match[] = { > + { .compatible = "mediatek,mt7988-xfi-pextp", }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, mtk_pextp_match); > + > +static struct platform_driver mtk_pextp_driver = { > + .probe = mtk_pextp_probe, > + .driver = { > + .name = "mtk-pextp", > + .of_match_table = mtk_pextp_match, > + }, > +}; > +module_platform_driver(mtk_pextp_driver); > + > +MODULE_DESCRIPTION("MediaTek pextp SerDes PHY driver"); > +MODULE_AUTHOR("Daniel Golle <daniel@makrotopia.org>"); > +MODULE_LICENSE("GPL"); > -- > 2.42.1
diff --git a/MAINTAINERS b/MAINTAINERS index 7b151710e8c58..6499acd8f3874 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13527,6 +13527,7 @@ L: netdev@vger.kernel.org S: Maintained F: drivers/net/phy/mediatek-ge-soc.c F: drivers/net/phy/mediatek-ge.c +F: drivers/phy/mediatek/phy-mediatek-pextp.c MEDIATEK I2C CONTROLLER DRIVER M: Qii Wang <qii.wang@mediatek.com> diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig index 3125ecb5d119f..a7749a6d96541 100644 --- a/drivers/phy/mediatek/Kconfig +++ b/drivers/phy/mediatek/Kconfig @@ -13,6 +13,17 @@ config PHY_MTK_PCIE callback for PCIe GEN3 port, it supports software efuse initialization. +config PHY_MTK_PEXTP + tristate "MediaTek PEXTP Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF && OF_ADDRESS + depends on HAS_IOMEM + select GENERIC_PHY + help + Say 'Y' here to add support for MediaTek pextp PHY driver. + The driver provides access to the Ethernet SerDes PHY supporting + various 1GE, 2.5GE, 5GE and 10GE modes. + config PHY_MTK_TPHY tristate "MediaTek T-PHY Driver" depends on ARCH_MEDIATEK || COMPILE_TEST diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile index c9a50395533eb..ca60c7b9b02ac 100644 --- a/drivers/phy/mediatek/Makefile +++ b/drivers/phy/mediatek/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_PHY_MTK_PCIE) += phy-mtk-pcie.o obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o obj-$(CONFIG_PHY_MTK_UFS) += phy-mtk-ufs.o obj-$(CONFIG_PHY_MTK_XSPHY) += phy-mtk-xsphy.o +obj-$(CONFIG_PHY_MTK_PEXTP) += phy-mtk-pextp.o phy-mtk-hdmi-drv-y := phy-mtk-hdmi.o phy-mtk-hdmi-drv-y += phy-mtk-hdmi-mt2701.o diff --git a/drivers/phy/mediatek/phy-mtk-pextp.c b/drivers/phy/mediatek/phy-mtk-pextp.c new file mode 100644 index 0000000000000..272bff4f37a96 --- /dev/null +++ b/drivers/phy/mediatek/phy-mtk-pextp.c @@ -0,0 +1,355 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* MediaTek 10GE SerDes PHY driver + * + * Copyright (c) 2023 Daniel Golle <daniel@makrotopia.org> + * based on mtk_usxgmii.c found in MediaTek's SDK released under GPL-2.0 + * Copyright (c) 2022 MediaTek Inc. + * Author: Henry Yen <henry.yen@mediatek.com> + */ + +#include <linux/module.h> +#include <linux/device.h> +#include <linux/netdevice.h> +#include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/reset.h> +#include <linux/phy.h> +#include <linux/phy/phy.h> + +struct mtk_pextp_phy { + void __iomem *base; + struct device *dev; + struct reset_control *reset; + struct clk *clk; + bool da_war; +}; + +static inline bool mtk_interface_mode_is_xgmii(phy_interface_t interface) +{ + switch (interface) { + case PHY_INTERFACE_MODE_INTERNAL: + case PHY_INTERFACE_MODE_USXGMII: + case PHY_INTERFACE_MODE_10GBASER: + case PHY_INTERFACE_MODE_5GBASER: + return true; + default: + return false; + } +} + +static void mtk_pextp_setup(struct mtk_pextp_phy *pextp, phy_interface_t interface) +{ + bool is_10g = (interface == PHY_INTERFACE_MODE_10GBASER || + interface == PHY_INTERFACE_MODE_USXGMII); + bool is_2p5g = (interface == PHY_INTERFACE_MODE_2500BASEX); + bool is_5g = (interface == PHY_INTERFACE_MODE_5GBASER); + + dev_dbg(pextp->dev, "setting up for mode %s\n", phy_modes(interface)); + + /* Setup operation mode */ + if (is_10g) + iowrite32(0x00C9071C, pextp->base + 0x9024); + else + iowrite32(0x00D9071C, pextp->base + 0x9024); + + if (is_5g) + iowrite32(0xAAA5A5AA, pextp->base + 0x2020); + else + iowrite32(0xAA8585AA, pextp->base + 0x2020); + + if (is_2p5g || is_5g || is_10g) { + iowrite32(0x0C020707, pextp->base + 0x2030); + iowrite32(0x0E050F0F, pextp->base + 0x2034); + iowrite32(0x00140032, pextp->base + 0x2040); + } else { + iowrite32(0x0C020207, pextp->base + 0x2030); + iowrite32(0x0E05050F, pextp->base + 0x2034); + iowrite32(0x00200032, pextp->base + 0x2040); + } + + if (is_2p5g || is_10g) + iowrite32(0x00C014AA, pextp->base + 0x50F0); + else if (is_5g) + iowrite32(0x00C018AA, pextp->base + 0x50F0); + else + iowrite32(0x00C014BA, pextp->base + 0x50F0); + + if (is_5g) { + iowrite32(0x3777812B, pextp->base + 0x50E0); + iowrite32(0x005C9CFF, pextp->base + 0x506C); + iowrite32(0x9DFAFAFA, pextp->base + 0x5070); + iowrite32(0x273F3F3F, pextp->base + 0x5074); + iowrite32(0xA8883868, pextp->base + 0x5078); + iowrite32(0x14661466, pextp->base + 0x507C); + } else { + iowrite32(0x3777C12B, pextp->base + 0x50E0); + iowrite32(0x005F9CFF, pextp->base + 0x506C); + iowrite32(0x9D9DFAFA, pextp->base + 0x5070); + iowrite32(0x27273F3F, pextp->base + 0x5074); + iowrite32(0xA7883C68, pextp->base + 0x5078); + iowrite32(0x11661166, pextp->base + 0x507C); + } + + if (is_2p5g || is_10g) { + iowrite32(0x0E000AAF, pextp->base + 0x5080); + iowrite32(0x08080D0D, pextp->base + 0x5084); + iowrite32(0x02030909, pextp->base + 0x5088); + } else if (is_5g) { + iowrite32(0x0E001ABF, pextp->base + 0x5080); + iowrite32(0x080B0D0D, pextp->base + 0x5084); + iowrite32(0x02050909, pextp->base + 0x5088); + } else { + iowrite32(0x0E000EAF, pextp->base + 0x5080); + iowrite32(0x08080E0D, pextp->base + 0x5084); + iowrite32(0x02030B09, pextp->base + 0x5088); + } + + if (is_5g) { + iowrite32(0x0C000000, pextp->base + 0x50E4); + iowrite32(0x04000000, pextp->base + 0x50E8); + } else { + iowrite32(0x0C0C0000, pextp->base + 0x50E4); + iowrite32(0x04040000, pextp->base + 0x50E8); + } + + if (is_2p5g || mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x0F0F0C06, pextp->base + 0x50EC); + else + iowrite32(0x0F0F0606, pextp->base + 0x50EC); + + if (is_5g) { + iowrite32(0x50808C8C, pextp->base + 0x50A8); + iowrite32(0x18000000, pextp->base + 0x6004); + } else { + iowrite32(0x506E8C8C, pextp->base + 0x50A8); + iowrite32(0x18190000, pextp->base + 0x6004); + } + + if (is_10g) + iowrite32(0x01423342, pextp->base + 0x00F8); + else if (is_5g) + iowrite32(0x00A132A1, pextp->base + 0x00F8); + else if (is_2p5g) + iowrite32(0x009C329C, pextp->base + 0x00F8); + else + iowrite32(0x00FA32FA, pextp->base + 0x00F8); + + /* Force SGDT_OUT off and select PCS */ + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x80201F20, pextp->base + 0x00F4); + else + iowrite32(0x80201F21, pextp->base + 0x00F4); + + /* Force GLB_CKDET_OUT */ + iowrite32(0x00050C00, pextp->base + 0x0030); + + /* Force AEQ on */ + iowrite32(0x02002800, pextp->base + 0x0070); + ndelay(1020); + + /* Setup DA default value */ + iowrite32(0x00000020, pextp->base + 0x30B0); + iowrite32(0x00008A01, pextp->base + 0x3028); + iowrite32(0x0000A884, pextp->base + 0x302C); + iowrite32(0x00083002, pextp->base + 0x3024); + if (mtk_interface_mode_is_xgmii(interface)) { + iowrite32(0x00022220, pextp->base + 0x3010); + iowrite32(0x0F020A01, pextp->base + 0x5064); + iowrite32(0x06100600, pextp->base + 0x50B4); + if (interface == PHY_INTERFACE_MODE_USXGMII) + iowrite32(0x40704000, pextp->base + 0x3048); + else + iowrite32(0x47684100, pextp->base + 0x3048); + } else { + iowrite32(0x00011110, pextp->base + 0x3010); + iowrite32(0x40704000, pextp->base + 0x3048); + } + + if (!mtk_interface_mode_is_xgmii(interface) && !is_2p5g) + iowrite32(0x0000C000, pextp->base + 0x3064); + + if (interface == PHY_INTERFACE_MODE_USXGMII) { + iowrite32(0xA8000000, pextp->base + 0x3050); + iowrite32(0x000000AA, pextp->base + 0x3054); + } else if (mtk_interface_mode_is_xgmii(interface)) { + iowrite32(0x00000000, pextp->base + 0x3050); + iowrite32(0x00000000, pextp->base + 0x3054); + } else { + iowrite32(0xA8000000, pextp->base + 0x3050); + iowrite32(0x000000AA, pextp->base + 0x3054); + } + + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x00000F00, pextp->base + 0x306C); + else if (is_2p5g) + iowrite32(0x22000F00, pextp->base + 0x306C); + else + iowrite32(0x20200F00, pextp->base + 0x306C); + + if (interface == PHY_INTERFACE_MODE_10GBASER && pextp->da_war) + iowrite32(0x0007B400, pextp->base + 0xA008); + + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x00040000, pextp->base + 0xA060); + else + iowrite32(0x00050000, pextp->base + 0xA060); + + if (is_10g) + iowrite32(0x00000001, pextp->base + 0x90D0); + else if (is_5g) + iowrite32(0x00000003, pextp->base + 0x90D0); + else if (is_2p5g) + iowrite32(0x00000005, pextp->base + 0x90D0); + else + iowrite32(0x00000007, pextp->base + 0x90D0); + + /* Release reset */ + iowrite32(0x0200E800, pextp->base + 0x0070); + usleep_range(150, 500); + + /* Switch to P0 */ + iowrite32(0x0200C111, pextp->base + 0x0070); + ndelay(1020); + iowrite32(0x0200C101, pextp->base + 0x0070); + usleep_range(15, 50); + + if (mtk_interface_mode_is_xgmii(interface)) { + /* Switch to Gen3 */ + iowrite32(0x0202C111, pextp->base + 0x0070); + } else { + /* Switch to Gen2 */ + iowrite32(0x0201C111, pextp->base + 0x0070); + } + ndelay(1020); + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x0202C101, pextp->base + 0x0070); + else + iowrite32(0x0201C101, pextp->base + 0x0070); + usleep_range(100, 500); + iowrite32(0x00000030, pextp->base + 0x30B0); + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x80201F00, pextp->base + 0x00F4); + else + iowrite32(0x80201F01, pextp->base + 0x00F4); + + iowrite32(0x30000000, pextp->base + 0x3040); + usleep_range(400, 1000); +} + +static int mtk_pextp_set_mode(struct phy *phy, enum phy_mode mode, int submode) +{ + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); + + if (mode != PHY_MODE_ETHERNET) + return -EINVAL; + + switch (submode) { + case PHY_INTERFACE_MODE_1000BASEX: + case PHY_INTERFACE_MODE_2500BASEX: + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_5GBASER: + case PHY_INTERFACE_MODE_10GBASER: + case PHY_INTERFACE_MODE_USXGMII: + mtk_pextp_setup(pextp, submode); + return 0; + default: + return -EINVAL; + } +} + +static int mtk_pextp_reset(struct phy *phy) +{ + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); + + reset_control_assert(pextp->reset); + usleep_range(100, 500); + reset_control_deassert(pextp->reset); + mdelay(10); + + return 0; +} + +static int mtk_pextp_power_on(struct phy *phy) +{ + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); + + return clk_prepare_enable(pextp->clk); +} + +static int mtk_pextp_power_off(struct phy *phy) +{ + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); + + clk_disable_unprepare(pextp->clk); + + return 0; +} + +static const struct phy_ops mtk_pextp_ops = { + .power_on = mtk_pextp_power_on, + .power_off = mtk_pextp_power_off, + .set_mode = mtk_pextp_set_mode, + .reset = mtk_pextp_reset, + .owner = THIS_MODULE, +}; + +static int mtk_pextp_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct phy_provider *phy_provider; + struct mtk_pextp_phy *pextp; + struct phy *phy; + + if (!np) + return -ENODEV; + + pextp = devm_kzalloc(&pdev->dev, sizeof(*pextp), GFP_KERNEL); + if (!pextp) + return -ENOMEM; + + pextp->base = devm_of_iomap(&pdev->dev, np, 0, NULL); + if (!pextp->base) + return -EIO; + + pextp->dev = &pdev->dev; + pextp->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(pextp->clk)) + return PTR_ERR(pextp->clk); + + pextp->reset = devm_reset_control_get_exclusive(&pdev->dev, NULL); + if (IS_ERR(pextp->reset)) + return PTR_ERR(pextp->reset); + + pextp->da_war = of_property_read_bool(np, "mediatek,usxgmii-performance-errata"); + + phy = devm_phy_create(&pdev->dev, NULL, &mtk_pextp_ops); + if (IS_ERR(phy)) + return PTR_ERR(phy); + + phy_set_drvdata(phy, pextp); + + phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id mtk_pextp_match[] = { + { .compatible = "mediatek,mt7988-xfi-pextp", }, + { } +}; +MODULE_DEVICE_TABLE(of, mtk_pextp_match); + +static struct platform_driver mtk_pextp_driver = { + .probe = mtk_pextp_probe, + .driver = { + .name = "mtk-pextp", + .of_match_table = mtk_pextp_match, + }, +}; +module_platform_driver(mtk_pextp_driver); + +MODULE_DESCRIPTION("MediaTek pextp SerDes PHY driver"); +MODULE_AUTHOR("Daniel Golle <daniel@makrotopia.org>"); +MODULE_LICENSE("GPL");
Add driver for MediaTek's pextp 10 Gigabit/s Ethernet SerDes PHY which can be found in the MT7988 SoC. The PHY can operates only in PHY_MODE_ETHERNET, the submode is one of PHY_INTERFACE_MODE_* corresponding to the supported modes: * USXGMII * 10GBase-R * 5GBase-R * 2500Base-X * 1000Base-X * Cisco SGMII (MAC side) In order to work-around a performance issue present on the first of two PEXTP present in MT7988 special tuning is applied which can be selected by adding the mediatek,usxgmii-performance-errata property to the device tree node. There is no documentation what-so-ever for the pextp registers and this driver is based on a GPL licensed implementation found in MediaTek's SDK. Signed-off-by: Daniel Golle <daniel@makrotopia.org> --- MAINTAINERS | 1 + drivers/phy/mediatek/Kconfig | 11 + drivers/phy/mediatek/Makefile | 1 + drivers/phy/mediatek/phy-mtk-pextp.c | 355 +++++++++++++++++++++++++++ 4 files changed, 368 insertions(+) create mode 100644 drivers/phy/mediatek/phy-mtk-pextp.c