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Thu, 05 Oct 2023 12:26:22 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778944820143026260 X-GMAIL-MSGID: 1778944820143026260 Add Nuvoton NPCM BMC SoCs support to USB ChipIdea driver. NPCM SoC include ChipIdea IP block that used for USB device controller mode. Signed-off-by: Tomer Maimon Acked-by: Peter Chen --- drivers/usb/chipidea/Kconfig | 4 + drivers/usb/chipidea/Makefile | 1 + drivers/usb/chipidea/ci_hdrc_npcm.c | 114 ++++++++++++++++++++++++++++ 3 files changed, 119 insertions(+) create mode 100644 drivers/usb/chipidea/ci_hdrc_npcm.c diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig index c815824a0b2d..bab45bc62361 100644 --- a/drivers/usb/chipidea/Kconfig +++ b/drivers/usb/chipidea/Kconfig @@ -43,6 +43,10 @@ config USB_CHIPIDEA_MSM tristate "Enable MSM hsusb glue driver" if EXPERT default USB_CHIPIDEA +config USB_CHIPIDEA_NPCM + tristate "Enable NPCM hsusb glue driver" if EXPERT + default USB_CHIPIDEA + config USB_CHIPIDEA_IMX tristate "Enable i.MX USB glue driver" if EXPERT depends on OF diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile index 71afeab97e83..718cb24603dd 100644 --- a/drivers/usb/chipidea/Makefile +++ b/drivers/usb/chipidea/Makefile @@ -13,6 +13,7 @@ ci_hdrc-$(CONFIG_USB_OTG_FSM) += otg_fsm.o obj-$(CONFIG_USB_CHIPIDEA_GENERIC) += ci_hdrc_usb2.o obj-$(CONFIG_USB_CHIPIDEA_MSM) += ci_hdrc_msm.o +obj-$(CONFIG_USB_CHIPIDEA_NPCM) += ci_hdrc_npcm.o obj-$(CONFIG_USB_CHIPIDEA_PCI) += ci_hdrc_pci.o obj-$(CONFIG_USB_CHIPIDEA_IMX) += usbmisc_imx.o ci_hdrc_imx.o obj-$(CONFIG_USB_CHIPIDEA_TEGRA) += ci_hdrc_tegra.o diff --git a/drivers/usb/chipidea/ci_hdrc_npcm.c b/drivers/usb/chipidea/ci_hdrc_npcm.c new file mode 100644 index 000000000000..37b64a3dbd96 --- /dev/null +++ b/drivers/usb/chipidea/ci_hdrc_npcm.c @@ -0,0 +1,114 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2023 Nuvoton Technology corporation. + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ci.h" + +struct npcm_udc_data { + struct platform_device *ci; + struct clk *core_clk; + struct ci_hdrc_platform_data pdata; +}; + +static int npcm_udc_notify_event(struct ci_hdrc *ci, unsigned event) +{ + struct device *dev = ci->dev->parent; + + switch (event) { + case CI_HDRC_CONTROLLER_RESET_EVENT: + /* clear all mode bits */ + hw_write(ci, OP_USBMODE, 0xffffffff, 0x0); + break; + default: + dev_dbg(dev, "unknown ci_hdrc event\n"); + break; + } + + return 0; +} + +static int npcm_udc_probe(struct platform_device *pdev) +{ + int ret; + struct npcm_udc_data *ci; + struct platform_device *plat_ci; + struct device *dev = &pdev->dev; + + ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL); + if (!ci) + return -ENOMEM; + platform_set_drvdata(pdev, ci); + + ci->core_clk = devm_clk_get_optional(dev, NULL); + if (IS_ERR(ci->core_clk)) + return PTR_ERR(ci->core_clk); + + ret = clk_prepare_enable(ci->core_clk); + if (ret) + return dev_err_probe(dev, ret, "failed to enable the clock: %d\n", ret); + + ci->pdata.name = dev_name(dev); + ci->pdata.capoffset = DEF_CAPOFFSET; + ci->pdata.flags = CI_HDRC_REQUIRES_ALIGNED_DMA | + CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS; + ci->pdata.phy_mode = USBPHY_INTERFACE_MODE_UTMI; + ci->pdata.notify_event = npcm_udc_notify_event; + + plat_ci = ci_hdrc_add_device(dev, pdev->resource, pdev->num_resources, + &ci->pdata); + if (IS_ERR(plat_ci)) { + ret = PTR_ERR(plat_ci); + dev_err(dev, "failed to register HDRC NPCM device: %d\n", ret); + goto clk_err; + } + + pm_runtime_no_callbacks(dev); + pm_runtime_enable(dev); + + return 0; + +clk_err: + clk_disable_unprepare(ci->core_clk); + return ret; +} + +static int npcm_udc_remove(struct platform_device *pdev) +{ + struct npcm_udc_data *ci = platform_get_drvdata(pdev); + + pm_runtime_disable(&pdev->dev); + ci_hdrc_remove_device(ci->ci); + clk_disable_unprepare(ci->core_clk); + + return 0; +} + +static const struct of_device_id npcm_udc_dt_match[] = { + { .compatible = "nuvoton,npcm750-udc", }, + { .compatible = "nuvoton,npcm845-udc", }, + { } +}; +MODULE_DEVICE_TABLE(of, npcm_udc_dt_match); + +static struct platform_driver npcm_udc_driver = { + .probe = npcm_udc_probe, + .remove = npcm_udc_remove, + .driver = { + .name = "npcm_udc", + .of_match_table = npcm_udc_dt_match, + }, +}; + +module_platform_driver(npcm_udc_driver); + +MODULE_DESCRIPTION("NPCM USB device controller driver"); +MODULE_AUTHOR("Tomer Maimon "); +MODULE_LICENSE("GPL v2");