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([2a01:e0a:3d9:2080:563:3654:17de:c930]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a4f009ff11sm17075482f8f.86.2025.06.03.00.37.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Jun 2025 00:37:58 -0700 (PDT) Message-ID: Date: Tue, 3 Jun 2025 09:37:58 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: neil.armstrong@linaro.org Subject: Re: [PATCH v5 3/4] phy: spacemit: support K1 USB2.0 PHY controller To: Ze Huang , Vinod Koul , Kishon Vijay Abraham I , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Yixun Lan , Philipp Zabel Cc: linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org References: <20250527-b4-k1-usb3-phy-v2-v5-0-2d366b0af999@whut.edu.cn> <20250527-b4-k1-usb3-phy-v2-v5-3-2d366b0af999@whut.edu.cn> Content-Language: en-US, fr Autocrypt: addr=neil.armstrong@linaro.org; keydata= xsBNBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAHNKk5laWwgQXJtc3Ryb25nIDxuZWlsLmFybXN0cm9uZ0BsaW5hcm8ub3JnPsLAkQQTAQoA OwIbIwULCQgHAwUVCgkICwUWAgMBAAIeAQIXgBYhBInsPQWERiF0UPIoSBaat7Gkz/iuBQJk Q5wSAhkBAAoJEBaat7Gkz/iuyhMIANiD94qDtUTJRfEW6GwXmtKWwl/mvqQtaTtZID2dos04 YqBbshiJbejgVJjy+HODcNUIKBB3PSLaln4ltdsV73SBcwUNdzebfKspAQunCM22Mn6FBIxQ GizsMLcP/0FX4en9NaKGfK6ZdKK6kN1GR9YffMJd2P08EO8mHowmSRe/ExAODhAs9W7XXExw UNCY4pVJyRPpEhv373vvff60bHxc1k/FF9WaPscMt7hlkbFLUs85kHtQAmr8pV5Hy9ezsSRa GzJmiVclkPc2BY592IGBXRDQ38urXeM4nfhhvqA50b/nAEXc6FzqgXqDkEIwR66/Gbp0t3+r yQzpKRyQif3OwE0ETVkGzwEIALyKDN/OGURaHBVzwjgYq+ZtifvekdrSNl8TIDH8g1xicBYp QTbPn6bbSZbdvfeQPNCcD4/EhXZuhQXMcoJsQQQnO4vwVULmPGgtGf8PVc7dxKOeta+qUh6+ SRh3vIcAUFHDT3f/Zdspz+e2E0hPV2hiSvICLk11qO6cyJE13zeNFoeY3ggrKY+IzbFomIZY 4yG6xI99NIPEVE9lNBXBKIlewIyVlkOaYvJWSV+p5gdJXOvScNN1epm5YHmf9aE2ZjnqZGoM Mtsyw18YoX9BqMFInxqYQQ3j/HpVgTSvmo5ea5qQDDUaCsaTf8UeDcwYOtgI8iL4oHcsGtUX oUk33HEAEQEAAcLAXwQYAQIACQUCTVkGzwIbDAAKCRAWmrexpM/4rrXiB/sGbkQ6itMrAIfn M7IbRuiSZS1unlySUVYu3SD6YBYnNi3G5EpbwfBNuT3H8//rVvtOFK4OD8cRYkxXRQmTvqa3 3eDIHu/zr1HMKErm+2SD6PO9umRef8V82o2oaCLvf4WeIssFjwB0b6a12opuRP7yo3E3gTCS KmbUuLv1CtxKQF+fUV1cVaTPMyT25Od+RC1K+iOR0F54oUJvJeq7fUzbn/KdlhA8XPGzwGRy 4zcsPWvwnXgfe5tk680fEKZVwOZKIEuJC3v+/yZpQzDvGYJvbyix0lHnrCzq43WefRHI5XTT QbM0WUIBIcGmq38+OgUsMYu4NzLu7uZFAcmp6h8g Organization: Linaro In-Reply-To: <20250527-b4-k1-usb3-phy-v2-v5-3-2d366b0af999@whut.edu.cn> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250603_003801_478907_49BB0210 X-CRM114-Status: GOOD ( 30.78 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Neil Armstrong Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 27/05/2025 14:01, Ze Huang wrote: > The SpacemiT K1 SoC includes three USB ports: > > - One USB2.0 OTG port > - One USB2.0 host-only port > - One USB3.0 port with an integrated USB2.0 DRD interface > > Each of these ports is connected to a USB2.0 PHY responsible for USB2 > transmission. > > This commit adds support for the SpacemiT K1 USB2.0 PHY, which is > compliant with the USB 2.0 specification and supports both 8-bit 60MHz > and 16-bit 30MHz parallel interfaces. > > Signed-off-by: Ze Huang > --- > drivers/phy/Kconfig | 1 + > drivers/phy/Makefile | 1 + > drivers/phy/spacemit/Kconfig | 13 ++++ > drivers/phy/spacemit/Makefile | 2 + > drivers/phy/spacemit/phy-k1-usb2.c | 144 +++++++++++++++++++++++++++++++++++++ > 5 files changed, 161 insertions(+) > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > index 8d58efe998ec5fd50054eed2c90d6ecce6bd5dd8..fca589aa7926eb5bce14e99785cf32cf0395202e 100644 > --- a/drivers/phy/Kconfig > +++ b/drivers/phy/Kconfig > @@ -114,6 +114,7 @@ source "drivers/phy/renesas/Kconfig" > source "drivers/phy/rockchip/Kconfig" > source "drivers/phy/samsung/Kconfig" > source "drivers/phy/socionext/Kconfig" > +source "drivers/phy/spacemit/Kconfig" > source "drivers/phy/st/Kconfig" > source "drivers/phy/starfive/Kconfig" > source "drivers/phy/sunplus/Kconfig" > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile > index e281442acc752820fe0bd638dfe38986a37c2a78..05993ff8a15daf7e2583b5f9b9b37ac584a30609 100644 > --- a/drivers/phy/Makefile > +++ b/drivers/phy/Makefile > @@ -34,6 +34,7 @@ obj-y += allwinner/ \ > rockchip/ \ > samsung/ \ > socionext/ \ > + spacemit/ \ > st/ \ > starfive/ \ > sunplus/ \ > diff --git a/drivers/phy/spacemit/Kconfig b/drivers/phy/spacemit/Kconfig > new file mode 100644 > index 0000000000000000000000000000000000000000..0136aee2e8a2f5f484da136b26f80130794b992c > --- /dev/null > +++ b/drivers/phy/spacemit/Kconfig > @@ -0,0 +1,13 @@ > +# SPDX-License-Identifier: GPL-2.0-only > +# > +# Phy drivers for SpacemiT platforms > +# > +config PHY_SPACEMIT_K1_USB2 > + tristate "SpacemiT K1 USB 2.0 PHY support" > + depends on (ARCH_SPACEMIT || COMPILE_TEST) && OF > + depends on COMMON_CLK > + depends on USB_COMMON > + select GENERIC_PHY > + help > + Enable this to support K1 USB 2.0 PHY driver. This driver takes care of > + enabling and clock setup and will be used by K1 udc/ehci/otg/xhci driver. > diff --git a/drivers/phy/spacemit/Makefile b/drivers/phy/spacemit/Makefile > new file mode 100644 > index 0000000000000000000000000000000000000000..fec0b425a948541b39b814caef0b05e1e002d92f > --- /dev/null > +++ b/drivers/phy/spacemit/Makefile > @@ -0,0 +1,2 @@ > +# SPDX-License-Identifier: GPL-2.0-only > +obj-$(CONFIG_PHY_SPACEMIT_K1_USB2) += phy-k1-usb2.o > diff --git a/drivers/phy/spacemit/phy-k1-usb2.c b/drivers/phy/spacemit/phy-k1-usb2.c > new file mode 100644 > index 0000000000000000000000000000000000000000..ee64af07478ea02b421473e6f73fd37a3a135e7d > --- /dev/null > +++ b/drivers/phy/spacemit/phy-k1-usb2.c > @@ -0,0 +1,144 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * SpacemiT K1 USB 2.0 PHY driver > + * > + * Copyright (C) 2025 SpacemiT (Hangzhou) Technology Co. Ltd > + * Copyright (C) 2025 Ze Huang > + */ > + > +#include > +#include > +#include > +#include > +#include > + > +#define USB2_PHY_REG01 0x04 > +#define USB2_PHY_REG01_VAL 0x60ef > +#define USB2_PHY_REG01_PLL_IS_READY BIT(0) > +#define USB2_PHY_REG04 0x10 > +#define USB2_PHY_REG04_AUTO_CLEAR_DIS BIT(2) > +#define USB2_PHY_REG0D 0x34 > +#define USB2_PHY_REG0D_VAL 0x1c > +#define USB2_PHY_REG26 0x98 > +#define USB2_PHY_REG26_VAL 0xbec4 > + > +#define USB2D_CTRL_RESET_TIME_MS 50 > + > +struct spacemit_usb2phy { > + struct phy *phy; > + struct clk *clk; > + struct regmap *regmap_base; > +}; > + > +static const struct regmap_config phy_regmap_config = { > + .reg_bits = 32, > + .val_bits = 32, > + .reg_stride = 4, > + .max_register = 0x200, > +}; > + > +static int spacemit_usb2phy_init(struct phy *phy) > +{ > + struct spacemit_usb2phy *sphy = phy_get_drvdata(phy); > + struct regmap *map = sphy->regmap_base; > + u32 val; > + int ret; > + > + ret = clk_prepare_enable(sphy->clk); clock is already prepared, should be clk_enable > + if (ret) { > + dev_err(&phy->dev, "failed to enable clock\n"); > + return ret; > + } > + > + /* > + * make sure the usb controller is not under reset process before > + * any configuration > + */ > + usleep_range(150, 200); > + regmap_write(map, USB2_PHY_REG26, USB2_PHY_REG26_VAL); /* 24M ref clk */ > + > + ret = regmap_read_poll_timeout(map, USB2_PHY_REG01, val, > + (val & USB2_PHY_REG01_PLL_IS_READY), > + 500, USB2D_CTRL_RESET_TIME_MS * 1000); > + if (ret) { > + dev_err(&phy->dev, "wait PHY_REG01[PLLREADY] timeout\n"); > + return ret; clk_disable on error ? > + } > + > + /* release usb2 phy internal reset and enable clock gating */ > + regmap_write(map, USB2_PHY_REG01, USB2_PHY_REG01_VAL); > + regmap_write(map, USB2_PHY_REG0D, USB2_PHY_REG0D_VAL); > + > + /* auto clear host disc */ > + regmap_update_bits(map, USB2_PHY_REG04, USB2_PHY_REG04_AUTO_CLEAR_DIS, > + USB2_PHY_REG04_AUTO_CLEAR_DIS); > + > + return 0; > +} > + > +static int spacemit_usb2phy_exit(struct phy *phy) > +{ > + struct spacemit_usb2phy *sphy = phy_get_drvdata(phy); > + > + clk_disable_unprepare(sphy->clk); clk_disable > + > + return 0; > +} > + > +static const struct phy_ops spacemit_usb2phy_ops = { > + .init = spacemit_usb2phy_init, > + .exit = spacemit_usb2phy_exit, > + .owner = THIS_MODULE, > +}; > + > +static int spacemit_usb2phy_probe(struct platform_device *pdev) > +{ > + struct phy_provider *phy_provider; > + struct device *dev = &pdev->dev; > + struct spacemit_usb2phy *sphy; > + void __iomem *base; > + > + sphy = devm_kzalloc(dev, sizeof(*sphy), GFP_KERNEL); > + if (!sphy) > + return -ENOMEM; > + > + sphy->clk = devm_clk_get_prepared(&pdev->dev, NULL); > + if (IS_ERR(sphy->clk)) > + return dev_err_probe(dev, PTR_ERR(sphy->clk), "Failed to get clock\n"); > + > + base = devm_platform_ioremap_resource(pdev, 0); > + if (IS_ERR(base)) > + return PTR_ERR(base); > + > + sphy->regmap_base = devm_regmap_init_mmio(dev, base, &phy_regmap_config); > + if (IS_ERR(sphy->regmap_base)) > + return dev_err_probe(dev, PTR_ERR(sphy->regmap_base), > + "Failed to init regmap\n"); > + > + sphy->phy = devm_phy_create(dev, NULL, &spacemit_usb2phy_ops); > + if (IS_ERR(sphy->phy)) > + return dev_err_probe(dev, PTR_ERR(sphy->phy), "Failed to create phy\n"); > + > + phy_set_drvdata(sphy->phy, sphy); > + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); > + > + return PTR_ERR_OR_ZERO(phy_provider); > +} > + > +static const struct of_device_id spacemit_usb2phy_dt_match[] = { > + { .compatible = "spacemit,k1-usb2-phy", }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, spacemit_usb2phy_dt_match); > + > +static struct platform_driver spacemit_usb2_phy_driver = { > + .probe = spacemit_usb2phy_probe, > + .driver = { > + .name = "spacemit-usb2-phy", > + .of_match_table = spacemit_usb2phy_dt_match, > + }, > +}; > +module_platform_driver(spacemit_usb2_phy_driver); > + > +MODULE_DESCRIPTION("Spacemit USB 2.0 PHY driver"); > +MODULE_LICENSE("GPL"); > Thanks, Neil _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv