From patchwork Tue Jun 7 13:22:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Conor Dooley X-Patchwork-Id: 12871920 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1877FC43334 for ; Tue, 7 Jun 2022 13:25:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244608AbiFGNZM (ORCPT ); Tue, 7 Jun 2022 09:25:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233373AbiFGNZJ (ORCPT ); Tue, 7 Jun 2022 09:25:09 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9521BCE9E; Tue, 7 Jun 2022 06:25:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1654608305; x=1686144305; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=X3o69IFmF+LBAO3ymP3xLAOVcl+mpRD5Mn89BDMXnKg=; b=nkEsYlsw+/cR+0uh1ipur7TL8P6eeGnDZP65Pbwf0SgGd0oAiqqUR8Lt e03UoDycQkx1W40ohN2GLDPe9Lau2Y7mF74OJXvCkQ6lTI+id4J/7sd2A hA7FREITb8nskjNxx3t/nvQJdkFkxLpu7MFXg1eO979twp1oaRXnj1h9Z +1vRpSgWBVmNwyXPKG8/yBbQPRa4ijhEILYRWURCBC9jhNQAEmbFhqA+W gxkymLJbwCuCqMs4CVuoykmS0FdTdqwfi37hEXt0dTaZFZmWeUNrOQfkf k4Ay5aat16J00AUt1ORPlPAPTkqM23A8Xow0h0VfMF4ynLd0wmrB+hlfd w==; X-IronPort-AV: E=Sophos;i="5.91,284,1647327600"; d="scan'208";a="162235981" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 07 Jun 2022 06:25:04 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Tue, 7 Jun 2022 06:25:02 -0700 Received: from wendy.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Tue, 7 Jun 2022 06:25:00 -0700 From: Conor Dooley To: Bin Liu , Greg Kroah-Hartman CC: Daire McNamara , Valentina Fernandez , , , , Conor Dooley Subject: [PATCH 1/3] usb: musb: Add support for PolarFire SoC's musb controller Date: Tue, 7 Jun 2022 14:22:02 +0100 Message-ID: <20220607132204.746180-2-conor.dooley@microchip.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220607132204.746180-1-conor.dooley@microchip.com> References: <20220607132204.746180-1-conor.dooley@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add support for Microchips's PolarFire SoC's musb controller in host, peripheral and otg mode. Tested-by: Valentina Fernandez Signed-off-by: Conor Dooley --- drivers/usb/musb/Kconfig | 13 +- drivers/usb/musb/Makefile | 1 + drivers/usb/musb/mpfs.c | 285 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 298 insertions(+), 1 deletion(-) create mode 100644 drivers/usb/musb/mpfs.c diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig index 4d61df6a9b5c..f906dfd360d3 100644 --- a/drivers/usb/musb/Kconfig +++ b/drivers/usb/musb/Kconfig @@ -123,6 +123,17 @@ config USB_MUSB_MEDIATEK select GENERIC_PHY select USB_ROLE_SWITCH +config USB_MUSB_POLARFIRE_SOC + tristate "Microchip PolarFire SoC platforms" + depends on SOC_MICROCHIP_POLARFIRE || COMPILE_TEST + depends on NOP_USB_XCEIV + select USB_MUSB_DUAL_ROLE + help + Say Y here to enable support for USB on Microchip's PolarFire SoC. + + This support is also available as a module. If so, the module + will be called mpfs. + comment "MUSB DMA mode" config MUSB_PIO_ONLY @@ -146,7 +157,7 @@ config USB_UX500_DMA config USB_INVENTRA_DMA bool 'Inventra' - depends on USB_MUSB_OMAP2PLUS || USB_MUSB_MEDIATEK || USB_MUSB_JZ4740 + depends on USB_MUSB_OMAP2PLUS || USB_MUSB_MEDIATEK || USB_MUSB_JZ4740 || USB_MUSB_POLARFIRE_SOC help Enable DMA transfers using Mentor's engine. diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile index 932247360a9f..51dd54a8de49 100644 --- a/drivers/usb/musb/Makefile +++ b/drivers/usb/musb/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_USB_MUSB_UX500) += ux500.o obj-$(CONFIG_USB_MUSB_JZ4740) += jz4740.o obj-$(CONFIG_USB_MUSB_SUNXI) += sunxi.o obj-$(CONFIG_USB_MUSB_MEDIATEK) += mediatek.o +obj-$(CONFIG_USB_MUSB_POLARFIRE_SOC) += mpfs.o # the kconfig must guarantee that only one of the # possible I/O schemes will be enabled at a time ... diff --git a/drivers/usb/musb/mpfs.c b/drivers/usb/musb/mpfs.c new file mode 100644 index 000000000000..2b3dda335783 --- /dev/null +++ b/drivers/usb/musb/mpfs.c @@ -0,0 +1,285 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PolarFire SoC (MPFS) MUSB Glue Layer + * + * Copyright (c) 2020-2022 Microchip Corporation. All rights reserved. + * Based on {omap2430,tusb6010,ux500}.c + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "musb_core.h" +#include "musb_dma.h" + +#define MPFS_MUSB_MAX_EP_NUM 8 +#define MPFS_MUSB_RAM_BITS 12 + +struct mpfs_glue { + struct device *dev; + struct platform_device *musb; + struct platform_device *phy; + struct clk *clk; +}; + +static struct musb_fifo_cfg mpfs_musb_mode_cfg[] = { + { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, + { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, + { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, + { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, + { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, }, + { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, }, + { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 1024, }, + { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 4096, }, +}; + +static const struct musb_hdrc_config mpfs_musb_hdrc_config = { + .fifo_cfg = mpfs_musb_mode_cfg, + .fifo_cfg_size = ARRAY_SIZE(mpfs_musb_mode_cfg), + .multipoint = true, + .dyn_fifo = true, + .num_eps = MPFS_MUSB_MAX_EP_NUM, + .ram_bits = MPFS_MUSB_RAM_BITS, +}; + +static irqreturn_t mpfs_musb_interrupt(int irq, void *__hci) +{ + unsigned long flags; + irqreturn_t ret = IRQ_NONE; + struct musb *musb = __hci; + + spin_lock_irqsave(&musb->lock, flags); + + musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); + musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); + musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); + + if (musb->int_usb || musb->int_tx || musb->int_rx) { + musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb); + musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx); + musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx); + ret = musb_interrupt(musb); + } + + spin_unlock_irqrestore(&musb->lock, flags); + + return ret; +} + +static void mpfs_musb_set_vbus(struct musb *musb, int is_on) +{ + u8 devctl; + + /* + * HDRC controls CPEN, but beware current surges during device + * connect. They can trigger transient overcurrent conditions + * that must be ignored. + */ + devctl = musb_readb(musb->mregs, MUSB_DEVCTL); + + if (is_on) { + musb->is_active = 1; + musb->xceiv->otg->default_a = 1; + musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; + devctl |= MUSB_DEVCTL_SESSION; + MUSB_HST_MODE(musb); + } else { + musb->is_active = 0; + + /* + * NOTE: skipping A_WAIT_VFALL -> A_IDLE and + * jumping right to B_IDLE... + */ + musb->xceiv->otg->default_a = 0; + musb->xceiv->otg->state = OTG_STATE_B_IDLE; + devctl &= ~MUSB_DEVCTL_SESSION; + + MUSB_DEV_MODE(musb); + } + + musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); + + dev_dbg(musb->controller, "VBUS %s, devctl %02x\n", + usb_otg_state_string(musb->xceiv->otg->state), + musb_readb(musb->mregs, MUSB_DEVCTL)); +} + +static int mpfs_musb_init(struct musb *musb) +{ + struct device *dev = musb->controller; + + musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); + if (IS_ERR(musb->xceiv)) { + dev_err(dev, "HS UDC: no transceiver configured\n"); + return PTR_ERR(musb->xceiv); + } + + musb->dyn_fifo = true; + musb->isr = mpfs_musb_interrupt; + + musb_platform_set_vbus(musb, 1); + + return 0; +} + +static const struct musb_platform_ops mpfs_ops = { + .quirks = MUSB_DMA_INVENTRA, + .init = mpfs_musb_init, + .fifo_mode = 2, +#ifdef CONFIG_USB_INVENTRA_DMA + .dma_init = musbhs_dma_controller_create, + .dma_exit = musbhs_dma_controller_destroy, +#endif + .set_vbus = mpfs_musb_set_vbus +}; + +static int mpfs_probe(struct platform_device *pdev) +{ + struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct mpfs_glue *glue; + struct platform_device *musb_pdev; + struct device *dev = &pdev->dev; + struct resource musb_resources[3]; + struct clk *clk; + int ret; + + glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL); + if (!glue) + return -ENOMEM; + + musb_pdev = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); + if (!musb_pdev) { + dev_err(dev, "failed to allocate musb device\n"); + return -ENOMEM; + } + + clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "failed to get clock\n"); + ret = PTR_ERR(clk); + goto err_phy_release; + } + + ret = clk_prepare_enable(clk); + if (ret) { + dev_err(&pdev->dev, "failed to enable clock\n"); + goto err_phy_release; + } + + musb_pdev->dev.parent = dev; + musb_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(39); + musb_pdev->dev.dma_mask = &musb_pdev->dev.coherent_dma_mask; + device_set_of_node_from_dev(&musb_pdev->dev, dev); + + glue->dev = dev; + glue->musb = musb_pdev; + glue->clk = clk; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + goto err_clk_disable; + + pdata->config = &mpfs_musb_hdrc_config; + pdata->platform_ops = &mpfs_ops; + + pdata->mode = usb_get_dr_mode(dev); + if (pdata->mode == USB_DR_MODE_UNKNOWN) { + dev_info(dev, "No dr_mode property found, defaulting to otg\n"); + pdata->mode = USB_DR_MODE_OTG; + } + + glue->phy = usb_phy_generic_register(); + if (IS_ERR(glue->phy)) { + dev_err(dev, "failed to register usb-phy %ld\n", + PTR_ERR(glue->phy)); + goto err_clk_disable; + } + + platform_set_drvdata(pdev, glue); + + memset(musb_resources, 0x00, + sizeof(*musb_resources) * ARRAY_SIZE(musb_resources)); + + musb_resources[0].name = pdev->resource[0].name; + musb_resources[0].start = pdev->resource[0].start; + musb_resources[0].end = pdev->resource[0].end; + musb_resources[0].flags = pdev->resource[0].flags; + + musb_resources[1].name = pdev->resource[1].name; + musb_resources[1].start = pdev->resource[1].start; + musb_resources[1].end = pdev->resource[1].end; + musb_resources[1].flags = pdev->resource[1].flags; + + musb_resources[2].name = pdev->resource[2].name; + musb_resources[2].start = pdev->resource[2].start; + musb_resources[2].end = pdev->resource[2].end; + musb_resources[2].flags = pdev->resource[2].flags; + + ret = platform_device_add_resources(musb_pdev, musb_resources, + ARRAY_SIZE(musb_resources)); + if (ret) { + dev_err(dev, "failed to add resources\n"); + goto err_clk_disable; + } + + ret = platform_device_add_data(musb_pdev, pdata, sizeof(*pdata)); + if (ret) { + dev_err(dev, "failed to add platform_data\n"); + goto err_clk_disable; + } + + ret = platform_device_add(musb_pdev); + if (ret) { + dev_err(dev, "failed to register musb device\n"); + goto err_clk_disable; + } + + dev_info(&pdev->dev, "Registered MPFS MUSB driver\n"); + return 0; + +err_clk_disable: + clk_disable_unprepare(clk); + +err_phy_release: + usb_phy_generic_unregister(glue->phy); + platform_device_put(musb_pdev); + return ret; +} + +static int mpfs_remove(struct platform_device *pdev) +{ + struct mpfs_glue *glue = platform_get_drvdata(pdev); + + platform_device_unregister(glue->musb); + usb_phy_generic_unregister(pdev); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id mpfs_id_table[] = { + { .compatible = "microchip,mpfs-musb" }, + { } +}; +MODULE_DEVICE_TABLE(of, mpfs_id_table); +#endif + +static struct platform_driver mpfs_musb_driver = { + .probe = mpfs_probe, + .remove = mpfs_remove, + .driver = { + .name = "mpfs-musb", + .of_match_table = of_match_ptr(mpfs_id_table) + }, +}; + +module_platform_driver(mpfs_musb_driver); + +MODULE_DESCRIPTION("PolarFire SoC MUSB Glue Layer"); +MODULE_LICENSE("GPL");