From patchwork Wed Jan 22 08:02:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hayes Wang X-Patchwork-Id: 11345147 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 88F4B17EA for ; Wed, 22 Jan 2020 08:04:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 721D82468A for ; Wed, 22 Jan 2020 08:04:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729327AbgAVIDe (ORCPT ); Wed, 22 Jan 2020 03:03:34 -0500 Received: from rtits2.realtek.com ([211.75.126.72]:33433 "EHLO rtits2.realtek.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729191AbgAVIDb (ORCPT ); Wed, 22 Jan 2020 03:03:31 -0500 Authenticated-By: X-SpamFilter-By: BOX Solutions SpamTrap 5.62 with qID 00M83R1u009745, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (RTEXMB06.realtek.com.tw[172.21.6.99]) by rtits2.realtek.com.tw (8.15.2/2.57/5.78) with ESMTPS id 00M83R1u009745 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 22 Jan 2020 16:03:28 +0800 Received: from RTEXMB06.realtek.com.tw (172.21.6.99) by RTEXMB06.realtek.com.tw (172.21.6.99) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Wed, 22 Jan 2020 16:03:27 +0800 Received: from RTITCASV01.realtek.com.tw (172.21.6.18) by RTEXMB06.realtek.com.tw (172.21.6.99) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.1.1779.2 via Frontend Transport; Wed, 22 Jan 2020 16:03:27 +0800 Received: from fc30.localdomain (172.21.177.138) by RTITCASV01.realtek.com.tw (172.21.6.18) with Microsoft SMTP Server id 14.3.468.0; Wed, 22 Jan 2020 16:03:26 +0800 From: Hayes Wang To: CC: , , , , , Hayes Wang Subject: [PATCH net v3 5/9] r8152: Disable PLA MCU clock speed down Date: Wed, 22 Jan 2020 16:02:09 +0800 Message-ID: <1394712342-15778-363-Taiwan-albertk@realtek.com> X-Mailer: Microsoft Office Outlook 11 In-Reply-To: <1394712342-15778-358-Taiwan-albertk@realtek.com> References: <1394712342-15778-338-Taiwan-albertk@realtek.com> <1394712342-15778-358-Taiwan-albertk@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.21.177.138] Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org PLA MCU clock speed down could only be enabled when tx/rx are disabled. Otherwise, the packet loss may occur. Signed-off-by: Hayes Wang --- drivers/net/usb/r8152.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index bc6b2f8aaa7e..1fb85c79bd33 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -324,6 +324,7 @@ #define MAC_CLK_SPDWN_EN BIT(15) /* PLA_MAC_PWR_CTRL3 */ +#define PLA_MCU_SPDWN_EN BIT(14) #define PKT_AVAIL_SPDWN_EN 0x0100 #define SUSPEND_SPDWN_EN 0x0004 #define U1U2_SPDWN_EN 0x0002 @@ -5005,6 +5006,8 @@ static void rtl8153_down(struct r8152 *tp) static void rtl8153b_up(struct r8152 *tp) { + u32 ocp_data; + if (test_bit(RTL8152_UNPLUG, &tp->flags)) return; @@ -5015,17 +5018,27 @@ static void rtl8153b_up(struct r8152 *tp) r8153_first_init(tp); ocp_write_dword(tp, MCU_TYPE_USB, USB_RX_BUF_TH, RX_THR_B); + ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3); + ocp_data &= ~PLA_MCU_SPDWN_EN; + ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, ocp_data); + r8153_aldps_en(tp, true); r8153b_u1u2en(tp, true); } static void rtl8153b_down(struct r8152 *tp) { + u32 ocp_data; + if (test_bit(RTL8152_UNPLUG, &tp->flags)) { rtl_drop_queued_tx(tp); return; } + ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3); + ocp_data |= PLA_MCU_SPDWN_EN; + ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, ocp_data); + r8153b_u1u2en(tp, false); r8153_u2p3en(tp, false); r8153b_power_cut_en(tp, false); @@ -5521,6 +5534,10 @@ static void r8153b_init(struct r8152 *tp) ocp_data |= MAC_CLK_SPDWN_EN; ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL2, ocp_data); + ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3); + ocp_data &= ~PLA_MCU_SPDWN_EN; + ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, ocp_data); + set_bit(GREEN_ETHERNET, &tp->flags); /* rx aggregation */