From patchwork Wed Mar 11 13:51:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 11431807 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1C39892A for ; Wed, 11 Mar 2020 13:51:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F069521D56 for ; Wed, 11 Mar 2020 13:51:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=crapouillou.net header.i=@crapouillou.net header.b="cDTBJWhX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729683AbgCKNvv (ORCPT ); Wed, 11 Mar 2020 09:51:51 -0400 Received: from outils.crapouillou.net ([89.234.176.41]:36798 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729559AbgCKNvv (ORCPT ); Wed, 11 Mar 2020 09:51:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1583934704; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Uf8CxbVzmwwbnnhCHgFTyi0dDe8iIqyWSouTjZIutd8=; b=cDTBJWhXpeHb2DRlmfmcoKB1j+nRXo7OWNmC6YAebfeNp1juvqC2wcvq7yRRaOwUY2xojK PDUTzxl5JcdJS84Bj3Zw3F70lgU5Vjbq0VjbAtWgGR7oTyGVih0RHAjdZkg40jcAP7123q KnFU2BVHzZkXqq/WnCU3l5qHwN1CTiE= From: Paul Cercueil To: Bin Liu Cc: Greg Kroah-Hartman , od@zcrc.me, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Cercueil , Artur Rojek Subject: [PATCH v3 2/5] usb: musb: jz4740: Add support for DMA Date: Wed, 11 Mar 2020 14:51:30 +0100 Message-Id: <20200311135133.16392-2-paul@crapouillou.net> In-Reply-To: <20200311135133.16392-1-paul@crapouillou.net> References: <20200311135133.16392-1-paul@crapouillou.net> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add support for using the DMA channels built into the Inventra IP. Signed-off-by: Paul Cercueil Tested-by: Artur Rojek --- Notes: v2-v3: No change drivers/usb/musb/Kconfig | 2 +- drivers/usb/musb/jz4740.c | 20 ++++++++++++++------ 2 files changed, 15 insertions(+), 7 deletions(-) diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig index eb2ded1026ee..c4b349e074c1 100644 --- a/drivers/usb/musb/Kconfig +++ b/drivers/usb/musb/Kconfig @@ -144,7 +144,7 @@ config USB_UX500_DMA config USB_INVENTRA_DMA bool 'Inventra' - depends on USB_MUSB_OMAP2PLUS || USB_MUSB_MEDIATEK + depends on USB_MUSB_OMAP2PLUS || USB_MUSB_MEDIATEK || USB_MUSB_JZ4740 help Enable DMA transfers using Mentor's engine. diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c index bc0109f4700b..aa32b5af0c1f 100644 --- a/drivers/usb/musb/jz4740.c +++ b/drivers/usb/musb/jz4740.c @@ -24,11 +24,14 @@ struct jz4740_glue { static irqreturn_t jz4740_musb_interrupt(int irq, void *__hci) { unsigned long flags; - irqreturn_t retval = IRQ_NONE; + irqreturn_t retval = IRQ_NONE, retval_dma = IRQ_NONE; struct musb *musb = __hci; spin_lock_irqsave(&musb->lock, flags); + if (IS_ENABLED(CONFIG_USB_INVENTRA_DMA) && musb->dma_controller) + retval_dma = dma_controller_irq(irq, musb->dma_controller); + 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); @@ -46,7 +49,10 @@ static irqreturn_t jz4740_musb_interrupt(int irq, void *__hci) spin_unlock_irqrestore(&musb->lock, flags); - return retval; + if (retval == IRQ_HANDLED || retval_dma == IRQ_HANDLED) + return IRQ_HANDLED; + + return IRQ_NONE; } static struct musb_fifo_cfg jz4740_musb_fifo_cfg[] = { @@ -93,14 +99,14 @@ static int jz4740_musb_init(struct musb *musb) return 0; } -/* - * DMA has not been confirmed to work with CONFIG_USB_INVENTRA_DMA, - * so let's not set up the dma function pointers yet. - */ static const struct musb_platform_ops jz4740_musb_ops = { .quirks = MUSB_DMA_INVENTRA | MUSB_INDEXED_EP, .fifo_mode = 2, .init = jz4740_musb_init, +#ifdef CONFIG_USB_INVENTRA_DMA + .dma_init = musbhs_dma_controller_create_noirq, + .dma_exit = musbhs_dma_controller_destroy, +#endif }; static const struct musb_hdrc_platform_data jz4740_musb_pdata = { @@ -142,6 +148,8 @@ static int jz4740_probe(struct platform_device *pdev) } musb->dev.parent = dev; + musb->dev.dma_mask = &musb->dev.coherent_dma_mask; + musb->dev.coherent_dma_mask = DMA_BIT_MASK(32); glue->pdev = musb; glue->clk = clk;