| Message ID | 20230927164222.3505-3-jszhang@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | usb: dwc3: add driver for T-HEAD TH1520 SoC | expand |
On 2023-09-27 11:42 AM, Jisheng Zhang wrote: > Adds TH1520 Glue layer to support USB controller on T-HEAD TH1520 SoC. > There is a DesignWare USB3 DRD core in TH1520 SoCs, the dwc3 core is > the child of this USB wrapper module device. > > Signed-off-by: Jisheng Zhang <jszhang@kernel.org> > --- > MAINTAINERS | 1 + > drivers/usb/dwc3/Kconfig | 9 +++ > drivers/usb/dwc3/Makefile | 1 + > drivers/usb/dwc3/dwc3-thead.c | 119 ++++++++++++++++++++++++++++++++++ > 4 files changed, 130 insertions(+) > create mode 100644 drivers/usb/dwc3/dwc3-thead.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 90f13281d297..d55e40060c46 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -18481,6 +18481,7 @@ M: Fu Wei <wefu@redhat.com> > L: linux-riscv@lists.infradead.org > S: Maintained > F: arch/riscv/boot/dts/thead/ > +F: drivers/usb/dwc3/dwc3-thead.c > > RNBD BLOCK DRIVERS > M: Md. Haris Iqbal <haris.iqbal@ionos.com> > diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig > index 98efcbb76c88..1b02f4f55b47 100644 > --- a/drivers/usb/dwc3/Kconfig > +++ b/drivers/usb/dwc3/Kconfig > @@ -178,4 +178,13 @@ config USB_DWC3_OCTEON > Only the host mode is currently supported. > Say 'Y' or 'M' here if you have one such device. > > +config USB_DWC3_THEAD > + tristate "T-HEAD Platform" > + depends on ARCH_THEAD || COMPILE_TEST > + default USB_DWC3 > + help > + Support T-HEAD platform with DesignWare Core USB3 IP. > + Only the host mode is currently supported. > + Say 'Y' or 'M' here if you have one such device. > + > endif > diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile > index fe1493d4bbe5..9523a51dd279 100644 > --- a/drivers/usb/dwc3/Makefile > +++ b/drivers/usb/dwc3/Makefile > @@ -55,3 +55,4 @@ obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o > obj-$(CONFIG_USB_DWC3_IMX8MP) += dwc3-imx8mp.o > obj-$(CONFIG_USB_DWC3_XILINX) += dwc3-xilinx.o > obj-$(CONFIG_USB_DWC3_OCTEON) += dwc3-octeon.o > +obj-$(CONFIG_USB_DWC3_THEAD) += dwc3-thead.o > diff --git a/drivers/usb/dwc3/dwc3-thead.c b/drivers/usb/dwc3/dwc3-thead.c > new file mode 100644 > index 000000000000..999b1e319c72 > --- /dev/null > +++ b/drivers/usb/dwc3/dwc3-thead.c > @@ -0,0 +1,119 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * dwc3-thead.c - T-HEAD platform specific glue layer > + * > + * Inspired by dwc3-of-simple.c > + * > + * Copyright (C) 2021 Alibaba Group Holding Limited. > + * Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org> > + * Copyright (c) 2018, The Linux Foundation. All rights reserved. > + */ > + > +#include <linux/io.h> > +#include <linux/kernel.h> > +#include <linux/mfd/syscon.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_platform.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > + > +#include "core.h" > + > +#define USB_SSP_EN 0x34 > +#define REF_SSP_EN BIT(0) > +#define USB_SYS 0x3c > +#define COMMONONN BIT(0) > + > +#define USB3_DRD_SWRST 0x14 > +#define USB3_DRD_PRST BIT(0) > +#define USB3_DRD_PHYRST BIT(1) > +#define USB3_DRD_VCCRST BIT(2) > +#define USB3_DRD_RSTMASK (USB3_DRD_PRST | USB3_DRD_PHYRST | USB3_DRD_VCCRST) > + > +struct dwc3_thead { > + void __iomem *base; > + struct regmap *misc_sysreg; > + struct regulator *vbus; > +}; > + > +static void dwc3_thead_optimize_power(struct dwc3_thead *thead) > +{ > + u32 val; > + > + /* config usb top within USB ctrl & PHY reset */ > + regmap_update_bits(thead->misc_sysreg, USB3_DRD_SWRST, > + USB3_DRD_RSTMASK, USB3_DRD_PRST); > + > + /* > + * dwc reg also need to be configed to save power > + * 1. set USB_SYS[COMMONONN] > + * 2. set DWC3_GCTL[SOFITPSYNC](done by core.c) > + * 3. set GUSB3PIPECTL[SUSPENDEN] (done by core.c) > + */ > + val = readl(thead->base + USB_SYS); > + val |= COMMONONN; > + writel(val, thead->base + USB_SYS); > + val = readl(thead->base + USB_SSP_EN); > + val |= REF_SSP_EN; > + writel(val, thead->base + USB_SSP_EN); > + > + regmap_update_bits(thead->misc_sysreg, USB3_DRD_SWRST, > + USB3_DRD_RSTMASK, USB3_DRD_RSTMASK); > +} > + > +static int dwc3_thead_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct device_node *np = dev->of_node; > + struct dwc3_thead *thead; > + int ret; > + > + thead = devm_kzalloc(&pdev->dev, sizeof(*thead), GFP_KERNEL); > + if (!thead) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, thead); No need to set driver data, since you never access it. > + > + ret = devm_regulator_get_enable_optional(dev, "vbus"); > + if (ret < 0 && ret != -ENODEV) > + return ret; If you want to ignore -ENODEV, use the non-_optional variant. > + > + thead->misc_sysreg = syscon_regmap_lookup_by_phandle(np, "thead,misc-sysreg"); > + if (IS_ERR(thead->misc_sysreg)) > + return PTR_ERR(thead->misc_sysreg); > + > + thead->base = devm_platform_ioremap_resource(pdev, 0); > + if (IS_ERR(thead->base)) > + return PTR_ERR(thead->base); > + > + dwc3_thead_optimize_power(thead); > + > + return of_platform_populate(np, NULL, NULL, dev); Using devm_of_platform_populate() will avoid the .remove_new hook. Regards, Samuel > +} > + > +static void dwc3_thead_remove(struct platform_device *pdev) > +{ > + of_platform_depopulate(&pdev->dev); > +} > + > +static const struct of_device_id dwc3_thead_of_match[] = { > + { .compatible = "thead,th1520-usb" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, dwc3_thead_of_match); > + > +static struct platform_driver dwc3_thead_driver = { > + .probe = dwc3_thead_probe, > + .remove_new = dwc3_thead_remove, > + .driver = { > + .name = "dwc3-thead", > + .of_match_table = dwc3_thead_of_match, > + }, > +}; > +module_platform_driver(dwc3_thead_driver); > + > +MODULE_ALIAS("platform:dwc3-thead"); > +MODULE_LICENSE("GPL v2"); > +MODULE_DESCRIPTION("DesignWare DWC3 T-HEAD Glue Driver"); > +MODULE_AUTHOR("Jisheng Zhang <jszhang@kernel.org>");
On 27/09/2023 18:42, Jisheng Zhang wrote: > Adds TH1520 Glue layer to support USB controller on T-HEAD TH1520 SoC. > There is a DesignWare USB3 DRD core in TH1520 SoCs, the dwc3 core is > the child of this USB wrapper module device. > > Signed-off-by: Jisheng Zhang <jszhang@kernel.org> > --- > MAINTAINERS | 1 + > drivers/usb/dwc3/Kconfig | 9 +++ > drivers/usb/dwc3/Makefile | 1 + > drivers/usb/dwc3/dwc3-thead.c | 119 ++++++++++++++++++++++++++++++++++ > 4 files changed, 130 insertions(+) > create mode 100644 drivers/usb/dwc3/dwc3-thead.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 90f13281d297..d55e40060c46 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -18481,6 +18481,7 @@ M: Fu Wei <wefu@redhat.com> > L: linux-riscv@lists.infradead.org > S: Maintained > F: arch/riscv/boot/dts/thead/ > +F: drivers/usb/dwc3/dwc3-thead.c > > RNBD BLOCK DRIVERS > M: Md. Haris Iqbal <haris.iqbal@ionos.com> > diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig > index 98efcbb76c88..1b02f4f55b47 100644 > --- a/drivers/usb/dwc3/Kconfig > +++ b/drivers/usb/dwc3/Kconfig > @@ -178,4 +178,13 @@ config USB_DWC3_OCTEON > Only the host mode is currently supported. > Say 'Y' or 'M' here if you have one such device. > > +config USB_DWC3_THEAD > + tristate "T-HEAD Platform" > + depends on ARCH_THEAD || COMPILE_TEST > + default USB_DWC3 > + help > + Support T-HEAD platform with DesignWare Core USB3 IP. > + Only the host mode is currently supported. > + Say 'Y' or 'M' here if you have one such device. > + > endif > diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile > index fe1493d4bbe5..9523a51dd279 100644 > --- a/drivers/usb/dwc3/Makefile > +++ b/drivers/usb/dwc3/Makefile > @@ -55,3 +55,4 @@ obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o > obj-$(CONFIG_USB_DWC3_IMX8MP) += dwc3-imx8mp.o > obj-$(CONFIG_USB_DWC3_XILINX) += dwc3-xilinx.o > obj-$(CONFIG_USB_DWC3_OCTEON) += dwc3-octeon.o > +obj-$(CONFIG_USB_DWC3_THEAD) += dwc3-thead.o > diff --git a/drivers/usb/dwc3/dwc3-thead.c b/drivers/usb/dwc3/dwc3-thead.c > new file mode 100644 > index 000000000000..999b1e319c72 > --- /dev/null > +++ b/drivers/usb/dwc3/dwc3-thead.c > @@ -0,0 +1,119 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * dwc3-thead.c - T-HEAD platform specific glue layer > + * > + * Inspired by dwc3-of-simple.c > + * > + * Copyright (C) 2021 Alibaba Group Holding Limited. > + * Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org> > + * Copyright (c) 2018, The Linux Foundation. All rights reserved. > + */ > + > +#include <linux/io.h> > +#include <linux/kernel.h> > +#include <linux/mfd/syscon.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_platform.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > + > +#include "core.h" > + > +#define USB_SSP_EN 0x34 > +#define REF_SSP_EN BIT(0) > +#define USB_SYS 0x3c > +#define COMMONONN BIT(0) > + > +#define USB3_DRD_SWRST 0x14 > +#define USB3_DRD_PRST BIT(0) > +#define USB3_DRD_PHYRST BIT(1) > +#define USB3_DRD_VCCRST BIT(2) > +#define USB3_DRD_RSTMASK (USB3_DRD_PRST | USB3_DRD_PHYRST | USB3_DRD_VCCRST) > + > +struct dwc3_thead { > + void __iomem *base; > + struct regmap *misc_sysreg; > + struct regulator *vbus; > +}; > + > +static void dwc3_thead_optimize_power(struct dwc3_thead *thead) > +{ > + u32 val; > + > + /* config usb top within USB ctrl & PHY reset */ > + regmap_update_bits(thead->misc_sysreg, USB3_DRD_SWRST, > + USB3_DRD_RSTMASK, USB3_DRD_PRST); > + > + /* > + * dwc reg also need to be configed to save power > + * 1. set USB_SYS[COMMONONN] > + * 2. set DWC3_GCTL[SOFITPSYNC](done by core.c) > + * 3. set GUSB3PIPECTL[SUSPENDEN] (done by core.c) > + */ > + val = readl(thead->base + USB_SYS); > + val |= COMMONONN; > + writel(val, thead->base + USB_SYS); > + val = readl(thead->base + USB_SSP_EN); > + val |= REF_SSP_EN; > + writel(val, thead->base + USB_SSP_EN); > + > + regmap_update_bits(thead->misc_sysreg, USB3_DRD_SWRST, > + USB3_DRD_RSTMASK, USB3_DRD_RSTMASK); > +} > + > +static int dwc3_thead_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct device_node *np = dev->of_node; > + struct dwc3_thead *thead; > + int ret; > + > + thead = devm_kzalloc(&pdev->dev, sizeof(*thead), GFP_KERNEL); > + if (!thead) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, thead); > + > + ret = devm_regulator_get_enable_optional(dev, "vbus"); > + if (ret < 0 && ret != -ENODEV) > + return ret; > + > + thead->misc_sysreg = syscon_regmap_lookup_by_phandle(np, "thead,misc-sysreg"); NAK. Test your DTS first. You do not have such property. > + if (IS_ERR(thead->misc_sysreg)) > + return PTR_ERR(thead->misc_sysreg); > + > + thead->base = devm_platform_ioremap_resource(pdev, 0); > + if (IS_ERR(thead->base)) > + return PTR_ERR(thead->base); > + > + dwc3_thead_optimize_power(thead); > + > + return of_platform_populate(np, NULL, NULL, dev); > +} > + > +static void dwc3_thead_remove(struct platform_device *pdev) > +{ > + of_platform_depopulate(&pdev->dev); > +} > + > +static const struct of_device_id dwc3_thead_of_match[] = { > + { .compatible = "thead,th1520-usb" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, dwc3_thead_of_match); > + > +static struct platform_driver dwc3_thead_driver = { > + .probe = dwc3_thead_probe, > + .remove_new = dwc3_thead_remove, > + .driver = { > + .name = "dwc3-thead", > + .of_match_table = dwc3_thead_of_match, > + }, > +}; > +module_platform_driver(dwc3_thead_driver); > + > +MODULE_ALIAS("platform:dwc3-thead"); No, you do not need this. If you need, your device ID table is wrong. Best regards, Krzysztof
diff --git a/MAINTAINERS b/MAINTAINERS index 90f13281d297..d55e40060c46 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18481,6 +18481,7 @@ M: Fu Wei <wefu@redhat.com> L: linux-riscv@lists.infradead.org S: Maintained F: arch/riscv/boot/dts/thead/ +F: drivers/usb/dwc3/dwc3-thead.c RNBD BLOCK DRIVERS M: Md. Haris Iqbal <haris.iqbal@ionos.com> diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index 98efcbb76c88..1b02f4f55b47 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -178,4 +178,13 @@ config USB_DWC3_OCTEON Only the host mode is currently supported. Say 'Y' or 'M' here if you have one such device. +config USB_DWC3_THEAD + tristate "T-HEAD Platform" + depends on ARCH_THEAD || COMPILE_TEST + default USB_DWC3 + help + Support T-HEAD platform with DesignWare Core USB3 IP. + Only the host mode is currently supported. + Say 'Y' or 'M' here if you have one such device. + endif diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index fe1493d4bbe5..9523a51dd279 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -55,3 +55,4 @@ obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o obj-$(CONFIG_USB_DWC3_IMX8MP) += dwc3-imx8mp.o obj-$(CONFIG_USB_DWC3_XILINX) += dwc3-xilinx.o obj-$(CONFIG_USB_DWC3_OCTEON) += dwc3-octeon.o +obj-$(CONFIG_USB_DWC3_THEAD) += dwc3-thead.o diff --git a/drivers/usb/dwc3/dwc3-thead.c b/drivers/usb/dwc3/dwc3-thead.c new file mode 100644 index 000000000000..999b1e319c72 --- /dev/null +++ b/drivers/usb/dwc3/dwc3-thead.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * dwc3-thead.c - T-HEAD platform specific glue layer + * + * Inspired by dwc3-of-simple.c + * + * Copyright (C) 2021 Alibaba Group Holding Limited. + * Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org> + * Copyright (c) 2018, The Linux Foundation. All rights reserved. + */ + +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#include "core.h" + +#define USB_SSP_EN 0x34 +#define REF_SSP_EN BIT(0) +#define USB_SYS 0x3c +#define COMMONONN BIT(0) + +#define USB3_DRD_SWRST 0x14 +#define USB3_DRD_PRST BIT(0) +#define USB3_DRD_PHYRST BIT(1) +#define USB3_DRD_VCCRST BIT(2) +#define USB3_DRD_RSTMASK (USB3_DRD_PRST | USB3_DRD_PHYRST | USB3_DRD_VCCRST) + +struct dwc3_thead { + void __iomem *base; + struct regmap *misc_sysreg; + struct regulator *vbus; +}; + +static void dwc3_thead_optimize_power(struct dwc3_thead *thead) +{ + u32 val; + + /* config usb top within USB ctrl & PHY reset */ + regmap_update_bits(thead->misc_sysreg, USB3_DRD_SWRST, + USB3_DRD_RSTMASK, USB3_DRD_PRST); + + /* + * dwc reg also need to be configed to save power + * 1. set USB_SYS[COMMONONN] + * 2. set DWC3_GCTL[SOFITPSYNC](done by core.c) + * 3. set GUSB3PIPECTL[SUSPENDEN] (done by core.c) + */ + val = readl(thead->base + USB_SYS); + val |= COMMONONN; + writel(val, thead->base + USB_SYS); + val = readl(thead->base + USB_SSP_EN); + val |= REF_SSP_EN; + writel(val, thead->base + USB_SSP_EN); + + regmap_update_bits(thead->misc_sysreg, USB3_DRD_SWRST, + USB3_DRD_RSTMASK, USB3_DRD_RSTMASK); +} + +static int dwc3_thead_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct dwc3_thead *thead; + int ret; + + thead = devm_kzalloc(&pdev->dev, sizeof(*thead), GFP_KERNEL); + if (!thead) + return -ENOMEM; + + platform_set_drvdata(pdev, thead); + + ret = devm_regulator_get_enable_optional(dev, "vbus"); + if (ret < 0 && ret != -ENODEV) + return ret; + + thead->misc_sysreg = syscon_regmap_lookup_by_phandle(np, "thead,misc-sysreg"); + if (IS_ERR(thead->misc_sysreg)) + return PTR_ERR(thead->misc_sysreg); + + thead->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(thead->base)) + return PTR_ERR(thead->base); + + dwc3_thead_optimize_power(thead); + + return of_platform_populate(np, NULL, NULL, dev); +} + +static void dwc3_thead_remove(struct platform_device *pdev) +{ + of_platform_depopulate(&pdev->dev); +} + +static const struct of_device_id dwc3_thead_of_match[] = { + { .compatible = "thead,th1520-usb" }, + { }, +}; +MODULE_DEVICE_TABLE(of, dwc3_thead_of_match); + +static struct platform_driver dwc3_thead_driver = { + .probe = dwc3_thead_probe, + .remove_new = dwc3_thead_remove, + .driver = { + .name = "dwc3-thead", + .of_match_table = dwc3_thead_of_match, + }, +}; +module_platform_driver(dwc3_thead_driver); + +MODULE_ALIAS("platform:dwc3-thead"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("DesignWare DWC3 T-HEAD Glue Driver"); +MODULE_AUTHOR("Jisheng Zhang <jszhang@kernel.org>");
Adds TH1520 Glue layer to support USB controller on T-HEAD TH1520 SoC. There is a DesignWare USB3 DRD core in TH1520 SoCs, the dwc3 core is the child of this USB wrapper module device. Signed-off-by: Jisheng Zhang <jszhang@kernel.org> --- MAINTAINERS | 1 + drivers/usb/dwc3/Kconfig | 9 +++ drivers/usb/dwc3/Makefile | 1 + drivers/usb/dwc3/dwc3-thead.c | 119 ++++++++++++++++++++++++++++++++++ 4 files changed, 130 insertions(+) create mode 100644 drivers/usb/dwc3/dwc3-thead.c