From patchwork Thu Nov 29 02:34:32 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bmZlbmcgWXVuICjkupHmmKXls7Ap?= X-Patchwork-Id: 10703809 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1740F13AD for ; Thu, 29 Nov 2018 02:35:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C86F2E5AE for ; Thu, 29 Nov 2018 02:35:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F3F8E2E6D9; Thu, 29 Nov 2018 02:35:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8EBCC2E5AE for ; Thu, 29 Nov 2018 02:35:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727687AbeK2NjF (ORCPT ); Thu, 29 Nov 2018 08:39:05 -0500 Received: from mailgw02.mediatek.com ([1.203.163.81]:44553 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727619AbeK2NjE (ORCPT ); Thu, 29 Nov 2018 08:39:04 -0500 X-UUID: e9ef9038344143468c31332f1e8b427b-20181129 X-UUID: e9ef9038344143468c31332f1e8b427b-20181129 Received: from mtkcas32.mediatek.inc [(172.27.4.250)] by mailgw02.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 273399762; Thu, 29 Nov 2018 10:35:02 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by MTKMBS31DR.mediatek.inc (172.27.6.102) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 29 Nov 2018 10:35:00 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 29 Nov 2018 10:34:53 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman CC: Felipe Balbi , Matthias Brugger , Chunfeng Yun , , , , , Subject: [PATCH 1/5] usb: mtu3: remove QMU checksum Date: Thu, 29 Nov 2018 10:34:32 +0800 Message-ID: X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The QMU checksum calculation is redundant, mostly used by debug, so remove it here. Signed-off-by: Chunfeng Yun --- drivers/usb/mtu3/mtu3_core.c | 2 -- drivers/usb/mtu3/mtu3_qmu.c | 26 -------------------------- 2 files changed, 28 deletions(-) diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index ae70b9bfd797..3dce5fd9887d 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -592,8 +592,6 @@ static void mtu3_regs_init(struct mtu3 *mtu) mtu3_clrbits(mbase, U3D_LINK_RESET_INFO, WTCHRP_MSK); /* U2/U3 detected by HW */ mtu3_writel(mbase, U3D_DEVICE_CONF, 0); - /* enable QMU 16B checksum */ - mtu3_setbits(mbase, U3D_QCR0, QMU_CS16B_EN); /* vbus detected by HW */ mtu3_clrbits(mbase, U3D_MISC_CTRL, VBUS_FRC_EN | VBUS_ON); } diff --git a/drivers/usb/mtu3/mtu3_qmu.c b/drivers/usb/mtu3/mtu3_qmu.c index ff62ba232177..73ac042c45a8 100644 --- a/drivers/usb/mtu3/mtu3_qmu.c +++ b/drivers/usb/mtu3/mtu3_qmu.c @@ -154,27 +154,6 @@ void mtu3_gpd_ring_free(struct mtu3_ep *mep) memset(ring, 0, sizeof(*ring)); } -/* - * calculate check sum of a gpd or bd - * add "noinline" and "mb" to prevent wrong calculation - */ -static noinline u8 qmu_calc_checksum(u8 *data) -{ - u8 chksum = 0; - int i; - - data[1] = 0x0; /* set checksum to 0 */ - - mb(); /* ensure the gpd/bd is really up-to-date */ - for (i = 0; i < QMU_CHECKSUM_LEN; i++) - chksum += data[i]; - - /* Default: HWO=1, @flag[bit0] */ - chksum += 1; - - return 0xFF - chksum; -} - void mtu3_qmu_resume(struct mtu3_ep *mep) { struct mtu3 *mtu = mep->mtu; @@ -260,7 +239,6 @@ static int mtu3_prepare_tx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq) if (req->zero) gpd->ext_flag |= GPD_EXT_FLAG_ZLP; - gpd->chksum = qmu_calc_checksum((u8 *)gpd); gpd->flag |= GPD_FLAGS_HWO; mreq->gpd = gpd; @@ -295,7 +273,6 @@ static int mtu3_prepare_rx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq) gpd->next_gpd = cpu_to_le32(lower_32_bits(enq_dma)); ext_addr |= GPD_EXT_NGP(upper_32_bits(enq_dma)); gpd->rx_ext_addr = cpu_to_le16(ext_addr); - gpd->chksum = qmu_calc_checksum((u8 *)gpd); gpd->flag |= GPD_FLAGS_HWO; mreq->gpd = gpd; @@ -323,7 +300,6 @@ int mtu3_qmu_start(struct mtu3_ep *mep) /* set QMU start address */ write_txq_start_addr(mbase, epnum, ring->dma); mtu3_setbits(mbase, MU3D_EP_TXCR0(epnum), TX_DMAREQEN); - mtu3_setbits(mbase, U3D_QCR0, QMU_TX_CS_EN(epnum)); /* send zero length packet according to ZLP flag in GPD */ mtu3_setbits(mbase, U3D_QCR1, QMU_TX_ZLP(epnum)); mtu3_writel(mbase, U3D_TQERRIESR0, @@ -338,7 +314,6 @@ int mtu3_qmu_start(struct mtu3_ep *mep) } else { write_rxq_start_addr(mbase, epnum, ring->dma); mtu3_setbits(mbase, MU3D_EP_RXCR0(epnum), RX_DMAREQEN); - mtu3_setbits(mbase, U3D_QCR0, QMU_RX_CS_EN(epnum)); /* don't expect ZLP */ mtu3_clrbits(mbase, U3D_QCR3, QMU_RX_ZLP(epnum)); /* move to next GPD when receive ZLP */ @@ -441,7 +416,6 @@ static void qmu_tx_zlp_error_handler(struct mtu3 *mtu, u8 epnum) /* by pass the current GDP */ gpd_current->flag |= GPD_FLAGS_BPS; - gpd_current->chksum = qmu_calc_checksum((u8 *)gpd_current); gpd_current->flag |= GPD_FLAGS_HWO; /*enable DMAREQEN, switch back to QMU mode */