From patchwork Mon May 6 14:38:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martyn Welch X-Patchwork-Id: 1932036 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=collabora.com header.i=@collabora.com header.a=rsa-sha256 header.s=mail header.b=3EH2YxSg; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org) Received: from phobos.denx.de (phobos.denx.de [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4VY3vV3t34z1ydW for ; Tue, 7 May 2024 00:39:18 +1000 (AEST) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id F131F882F1; Mon, 6 May 2024 16:39:05 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=quarantine dis=none) header.from=collabora.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (2048-bit key; unprotected) header.d=collabora.com header.i=@collabora.com header.b="3EH2YxSg"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id B1E9B88607; Mon, 6 May 2024 16:39:04 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.2 Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [IPv6:2a00:1098:ed:100::25]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id AF941885B5 for ; Mon, 6 May 2024 16:39:02 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=quarantine dis=none) header.from=collabora.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=martyn.welch@collabora.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1715006342; bh=aXGe72gn/JrE68sEfWtH1zBFaulcIetmUmQm5i/YQ7M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=3EH2YxSgIDoL9pJkUvA6glLXu3MsfObZc06gJUv304PHbbNUYACstffOw5MM8iq+u ijyVjzpDwGjFq1GBnq5UQJWOWVtIZCblxrg643xsz0+6NZJaq/LYA6m6w0j0/yfnrq GUmRxItqZHhtp2CoXbAbN80P+z3W+ZurS9u9fXJW3egnSGOQzmNcWmA62zL9OAcbTa p/dQnwQcB3fpIBrH1beYSxQFSJ+hoZITupaEMx15OPZOb1zxfeRvt+gJZ9UYJY1uwd ZsaV9cxUYZsILp91ebFpO/S/trcNW3gFq18f8G8UMOxvXv/isTHAHDb7VSAajRgLeW HKq2Dx2RGYblA== Received: from pan.lan (ec2-34-240-57-77.eu-west-1.compute.amazonaws.com [34.240.57.77]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: martyn) by madrid.collaboradmins.com (Postfix) with ESMTPSA id 840FC3782134; Mon, 6 May 2024 14:39:01 +0000 (UTC) From: Martyn Welch To: Dave Gerlach , Tom Rini , Nishanth Menon , Robert Nelson Cc: Sjoerd Simons , Alexander Sverdlin , Mattijs Korpershoek , Martyn Welch , u-boot@lists.denx.de Subject: [PATCH v5 1/6] usb: dwc3: Add dwc3 glue driver for am62 Date: Mon, 6 May 2024 15:38:41 +0100 Message-ID: <20240506143846.1252377-2-martyn.welch@collabora.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240506143846.1252377-1-martyn.welch@collabora.com> References: <20240506143846.1252377-1-martyn.welch@collabora.com> MIME-Version: 1.0 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean From: Sjoerd Simons Add glue code for TI AM62 to the dwc3 driver; Most code adopted from TI vendor u-boot code. Signed-off-by: Sjoerd Simons Tested-by: Alexander Sverdlin Reviewed-by: Mattijs Korpershoek Tested-by: Mattijs Korpershoek # on beagle play --- Changes in v5: - No change Changes in v4: - Add config dependency on SYSCON - Move defines and constants outside out of function scope Changes in v2: - Switch dwc3 glue to a seperate driver rather then in dwc-generic drivers/usb/dwc3/Kconfig | 14 ++++ drivers/usb/dwc3/Makefile | 1 + drivers/usb/dwc3/dwc3-am62.c | 125 +++++++++++++++++++++++++++++++++++ 3 files changed, 140 insertions(+) create mode 100644 drivers/usb/dwc3/dwc3-am62.c diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index c0c8c16fd9..0100723a68 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -37,6 +37,20 @@ config SPL_USB_DWC3_GENERIC Select this for Xilinx ZynqMP and similar Platforms. This wrapper supports Host and Peripheral operation modes. +config SPL_USB_DWC3_AM62 + bool "TI AM62 USB wrapper" + depends on SPL_DM_USB && SPL_USB_DWC3_GENERIC && SPL_SYSCON + help + Select this for TI AM62 Platforms. + This wrapper supports Host and Peripheral operation modes. + +config USB_DWC3_AM62 + bool "TI AM62 USB wrapper" + depends on DM_USB && USB_DWC3_GENERIC && SYSCON + help + Select this for TI AM62 Platforms. + This wrapper supports Host and Peripheral operation modes. + config USB_DWC3_MESON_G12A bool "Amlogic Meson G12A USB wrapper" depends on DM_USB && USB_DWC3 && ARCH_MESON diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index 97b4f7191c..a46b6824ab 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -6,6 +6,7 @@ dwc3-y := core.o obj-$(CONFIG_USB_DWC3_GADGET) += gadget.o ep0.o +obj-$(CONFIG_$(SPL_)USB_DWC3_AM62) += dwc3-am62.o obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o obj-$(CONFIG_USB_DWC3_MESON_G12A) += dwc3-meson-g12a.o obj-$(CONFIG_USB_DWC3_MESON_GXL) += dwc3-meson-gxl.o diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c new file mode 100644 index 0000000000..99519602eb --- /dev/null +++ b/drivers/usb/dwc3/dwc3-am62.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * TI AM62 specific glue layer for DWC3 + */ + +#include +#include +#include +#include +#include + +#include "dwc3-generic.h" + +#define USBSS_MODE_CONTROL 0x1c +#define USBSS_PHY_CONFIG 0x8 +#define USBSS_PHY_VBUS_SEL_MASK GENMASK(2, 1) +#define USBSS_PHY_VBUS_SEL_SHIFT 1 +#define USBSS_MODE_VALID BIT(0) +#define PHY_PLL_REFCLK_MASK GENMASK(3, 0) +static const int dwc3_ti_am62_rate_table[] = { /* in KHZ */ + 9600, + 10000, + 12000, + 19200, + 20000, + 24000, + 25000, + 26000, + 38400, + 40000, + 58000, + 50000, + 52000, +}; + +static void dwc3_ti_am62_glue_configure(struct udevice *dev, int index, + enum usb_dr_mode mode) +{ + struct clk usb2_refclk; + int rate_code, i, ret; + unsigned long rate; + u32 reg; + void *usbss; + bool vbus_divider; + struct regmap *syscon; + struct ofnode_phandle_args args; + + usbss = dev_remap_addr_index(dev, 0); + if (IS_ERR(usbss)) { + dev_err(dev, "can't map IOMEM resource\n"); + return; + } + + ret = clk_get_by_name(dev, "ref", &usb2_refclk); + if (ret) { + dev_err(dev, "can't get usb2_refclk\n"); + return; + } + + /* Calculate the rate code */ + rate = clk_get_rate(&usb2_refclk); + rate /= 1000; /* To KHz */ + for (i = 0; i < ARRAY_SIZE(dwc3_ti_am62_rate_table); i++) { + if (dwc3_ti_am62_rate_table[i] == rate) + break; + } + + if (i == ARRAY_SIZE(dwc3_ti_am62_rate_table)) { + dev_err(dev, "unsupported usb2_refclk rate: %lu KHz\n", rate); + return; + } + + rate_code = i; + + /* Read the syscon property */ + syscon = syscon_regmap_lookup_by_phandle(dev, "ti,syscon-phy-pll-refclk"); + if (IS_ERR(syscon)) { + dev_err(dev, "unable to get ti,syscon-phy-pll-refclk regmap\n"); + return; + } + + ret = ofnode_parse_phandle_with_args(dev_ofnode(dev), "ti,syscon-phy-pll-refclk", NULL, 1, + 0, &args); + if (ret) + return; + + /* Program PHY PLL refclk by reading syscon property */ + ret = regmap_update_bits(syscon, args.args[0], PHY_PLL_REFCLK_MASK, rate_code); + if (ret) { + dev_err(dev, "failed to set phy pll reference clock rate\n"); + return; + } + + /* VBUS divider select */ + reg = readl(usbss + USBSS_PHY_CONFIG); + vbus_divider = dev_read_bool(dev, "ti,vbus-divider"); + if (vbus_divider) + reg |= 1 << USBSS_PHY_VBUS_SEL_SHIFT; + + writel(reg, usbss + USBSS_PHY_CONFIG); + + /* Set mode valid */ + reg = readl(usbss + USBSS_MODE_CONTROL); + reg |= USBSS_MODE_VALID; + writel(reg, usbss + USBSS_MODE_CONTROL); +} + +struct dwc3_glue_ops ti_am62_ops = { + .glue_configure = dwc3_ti_am62_glue_configure, +}; + +static const struct udevice_id dwc3_am62_match[] = { + { .compatible = "ti,am62-usb", .data = (ulong)&ti_am62_ops }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(dwc3_am62_wrapper) = { + .name = "dwc3-am62", + .id = UCLASS_SIMPLE_BUS, + .of_match = dwc3_am62_match, + .bind = dwc3_glue_bind, + .probe = dwc3_glue_probe, + .remove = dwc3_glue_remove, + .plat_auto = sizeof(struct dwc3_glue_data), +};