From patchwork Thu Nov 30 06:15:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?QXhlIFlhbmcgKOadqOejiik=?= X-Patchwork-Id: 13474104 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 52F7CC10DAA for ; Thu, 30 Nov 2023 06:15:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=REy94AAJaYZvG1e+Q5y3StrQOPyjWjRYey4f+drmRhg=; b=fZh548qb9eht3BchKpF1mJeQCt xutNylP+vhS1YRPib4MWLnT0Lj0p822mDYR1tT7Hs1K0FqoRY9KzWbPJULcMoSF3RouQbxFezELmH rGlRTr9BD5MDezas2D/ujNPH/Ac+s4OAPGgZ6ekAMJkIOKJ2pWQ3EDvsDjjXvbz3A90Fau3Rr5q00 hMLIPJeOGr4AQ1w7Vhk44BKnGO5da0ZgxPn0HRNX7/fG4I8K85hJ6iEkXRW3SN2VocG8nCg88ChfW /dvHd3mM7zP95R/lUNBarI+8300Ik50SS1dumaL5IZoBYz+6N3daybC7F2gwaHeuza+d8jtx64lWU ZeCAcu3A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r8aKh-00A0YJ-2U; Thu, 30 Nov 2023 06:15:31 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r8aKf-00A0Xb-1V; Thu, 30 Nov 2023 06:15:30 +0000 X-UUID: d7ad117a8f4711ee9b7791016c24628a-20231129 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=REy94AAJaYZvG1e+Q5y3StrQOPyjWjRYey4f+drmRhg=; b=fhPwC85u8D326GTWBeE7bQgC3BnqjiVWIU102xlISgYEhJcVchI6OGEEx0yg+cXg1XjY3od6l9rPUFbo1lCAeLAqwf67KtxeqDd5vPz7Bw+NhG4ZogJ0XIiAtNMbWEUbY9EQ2zCSi8CUkO3yud38L9OvGB0oe4wuAN/8kVAOafo=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.34,REQID:dd5d61d9-afb9-4e33-8517-d91be42c22e5,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:abefa75,CLOUDID:865dfb95-10ce-4e4b-85c2-c9b5229ff92b,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO, DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: d7ad117a8f4711ee9b7791016c24628a-20231129 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1089439340; Wed, 29 Nov 2023 23:15:21 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 30 Nov 2023 14:15:18 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 30 Nov 2023 14:15:18 +0800 From: Axe Yang To: Chaotian Jing , Ulf Hansson , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , "Wenbin Mei" CC: , , , , , , Axe Yang , Krzysztof Kozlowski Subject: [PATCH v3 1/2] dt-bindings: mmc: mtk-sd: add tuning steps related property Date: Thu, 30 Nov 2023 14:15:12 +0800 Message-ID: <20231130061513.1296-2-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231130061513.1296-1-axe.yang@mediatek.com> References: <20231130061513.1296-1-axe.yang@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--8.084500-8.000000 X-TMASE-MatchedRID: wDTc/wNgEcN3dXZvIJVkUOw8wbnnSw8bHg7k13K467J0TRq4bcxmH3Im l2BIvAJu7p17JCLIX7cfSuixqQMLLLvhKf49TtYAbBu6+EIezdyZf5btvM85Abv408/GP5HqfmK fyen8+8qrarPPtIvi4m9yZj3aufb5HxPMjOKY7A8LbigRnpKlKWxlRJiH4397+ruzfpzKUonZFO k4V7qu28n1qJ08wLl8oSFuOnQmBmi6NfM7QpaIJg== X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--8.084500-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: D519890939F3F44D9AA4CDBFC8AA06CF8DF45DCDC5A358483C9D762ED3BE9DEA2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231129_221529_509327_4620C178 X-CRM114-Status: UNSURE ( 9.34 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add 'mediatek,tuning-steps' setting. This property will give MSDC a chance to extend tuning steps up to 64. With more tuning steps, MSDC may achieve a more optimal calibration result, thus avoiding potential CRC issues. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Axe Yang --- Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml index 3fffa467e4e1..c532ec92d2d9 100644 --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml @@ -145,6 +145,15 @@ properties: minimum: 0 maximum: 7 + mediatek,tuning-step: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Some SoCs need extend tuning step for better delay value to avoid CRC issue. + If not present, default tuning step is 32. For eMMC and SD, this can yield + satisfactory calibration results in most cases. + enum: [32, 64] + default: 32 + resets: maxItems: 1 From patchwork Thu Nov 30 06:15:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?QXhlIFlhbmcgKOadqOejiik=?= X-Patchwork-Id: 13474106 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E3B40C4167B for ; Thu, 30 Nov 2023 06:16:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=3M6A7k0XflTWsvj8siywxp0LXUsD7WlkZyI0hPYHAkc=; b=XxdwWxyWS/s4HRq7z0kBCt3QXP Fwc9CfkyZYg32vja3atWC1DMG+MrPBRLcq78OgCwVKCPoOi1J+w3hRm7UyWRZ4qHZECBQzsIRbIT5 s+YAbb7Un1O6fuGQYt1JHiyV48Wwm6Rxosbt7o7drcfbYvxhzWn2Q+QrYPpV4EGdCx2EoKWVQxFvW rccKMwP4F27ymW/izSRMuApU4U4hJIRnVNUQ+qjz9h5GMjIwbHacibswVLppmfAqMYsgVC3ac01+l 7+5asvCLSciQF9N5pXXqZMAlZttn/RiJDeP2b2lq+r7RIE31XteGGNPdX0c5sJrz7Gt4d/KMNTPd+ bo931fDg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r8aLC-00A0ft-2t; Thu, 30 Nov 2023 06:16:02 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r8aL7-00A0do-38; Thu, 30 Nov 2023 06:16:00 +0000 X-UUID: e8a41a0a8f4711ee86758d4a7c00f3a0-20231129 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=3M6A7k0XflTWsvj8siywxp0LXUsD7WlkZyI0hPYHAkc=; b=nbFP7pX6th76uHZq9Sx10dn8P5lQi4qn5A5kGTTkxTWV7GkQ7NAyzwPZirj7dw/ryHJj+LTa3iXD8/9AP+cfdJFSfgbCwwFMQ48RibHY5Cnn/QcJMs2OOdMchZ6Ik7Tab9xiWfpnysVJxGDq/lu2hrvy355NHnXc4GBpf6ZrWI0=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.34,REQID:fe585b22-c883-4bb3-8b3a-70de84bee668,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:abefa75,CLOUDID:79c73d73-1bd3-4f48-b671-ada88705968c,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO, DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: e8a41a0a8f4711ee86758d4a7c00f3a0-20231129 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1922748072; Wed, 29 Nov 2023 23:15:50 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 30 Nov 2023 14:15:20 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 30 Nov 2023 14:15:19 +0800 From: Axe Yang To: Chaotian Jing , Ulf Hansson , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , "Wenbin Mei" CC: , , , , , , Axe Yang Subject: [PATCH v3 2/2] mmc: mediatek: extend number of tuning steps Date: Thu, 30 Nov 2023 14:15:13 +0800 Message-ID: <20231130061513.1296-3-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231130061513.1296-1-axe.yang@mediatek.com> References: <20231130061513.1296-1-axe.yang@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--8.977800-8.000000 X-TMASE-MatchedRID: UNsncxXyULd80yFIYo0rRuGonqgs5zxBRjqOkKPmpa4UlWIKEoGBmc+/ a0S0vHt4WZy+62a7b19rOAp0kI1DP9H/WqWljGhSSDkh6bW+bcckMBkEieOjZi8ggN9+4AxXDk6 /c+jKAHFIl95haju6JaPNT9pmq5xZMZPj25j8CtwD2WXLXdz+ASlayzmQ9QV0LXc81qaZoAZ6BY sNJ37NLlzcgkMGmqXJbaWmopg96Z1F/TNFimjSuL50lYduDghOEVhvB8sXyyN39JELjK+oYGpHK tkQBynKW3gtfnNC/JHwlIRl/0urFbGynpy6kEvAM71h0SMVl8InKdHifmIw3NEsTITobgNEEUbg QYFHh3i5G69xLZU4ggJ+2GmvVjyvQF24kZp9Ww+eAiCmPx4NwJuJ+Pb8n/VxSnQ4MjwaO9cqtq5 d3cxkNUSsCaCt2sGttFxY0DNCfMtlaJ/OXY3Hj82QbiiYbJ67obVfa1MZ60c= X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--8.977800-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 5F28E17A81402823103F41B22B32169FC7BCC3BE05F2A7CE481E6F1EF01D7FA42000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231129_221558_016204_302F94BE X-CRM114-Status: GOOD ( 27.75 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Previously, during the MSDC calibration process, a full clock cycle actually not be covered, which in some cases didn't yield the best results and could cause CRC errors. This problem is particularly evident when MSDC is used as an SDIO host. In fact, MSDC support tuning up to a maximum of 64 steps, but by default, the step number is 32. By increase the tuning step, we are more likely to cover more parts of a clock cycle, and get better calibration result. To illustrate, when tuning 32 steps, if the obtained window has a hole near the middle, like this: 0xffc07ff (hex), then the selected delay will be the 6 (counting from right to left). (32 <- 1) 1111 1111 1100 0000 0000 0111 11(1)1 1111 However, if we tune 64 steps, the window obtained may look like this: 0xfffffffffffc07ff. The final selected delay will be 44, which is safer as it is further away from the hole: (64 <- 1) 1111 ... (1)111 1111 1111 1111 1111 1100 0000 0000 0111 1111 1111 In this case, delay 6 selected through 32 steps tuning is obviously not optimal, and this delay is closer to the hole, using it would easily cause CRC problems. You will need to configure property "mediatek,tuning-step" in MSDC dts node to 64 to extend the steps. Signed-off-by: Axe Yang --- drivers/mmc/host/mtk-sd.c | 155 ++++++++++++++++++++++++++------------ 1 file changed, 107 insertions(+), 48 deletions(-) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 97f7c3d4be6e..4cd306b3b295 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -252,12 +252,16 @@ #define MSDC_PAD_TUNE_DATWRDLY GENMASK(4, 0) /* RW */ #define MSDC_PAD_TUNE_DATRRDLY GENMASK(12, 8) /* RW */ +#define MSDC_PAD_TUNE_DATRRDLY2 GENMASK(12, 8) /* RW */ #define MSDC_PAD_TUNE_CMDRDLY GENMASK(20, 16) /* RW */ +#define MSDC_PAD_TUNE_CMDRDLY2 GENMASK(20, 16) /* RW */ #define MSDC_PAD_TUNE_CMDRRDLY GENMASK(26, 22) /* RW */ #define MSDC_PAD_TUNE_CLKTDLY GENMASK(31, 27) /* RW */ #define MSDC_PAD_TUNE_RXDLYSEL BIT(15) /* RW */ #define MSDC_PAD_TUNE_RD_SEL BIT(13) /* RW */ #define MSDC_PAD_TUNE_CMD_SEL BIT(21) /* RW */ +#define MSDC_PAD_TUNE_RD2_SEL BIT(13) /* RW */ +#define MSDC_PAD_TUNE_CMD2_SEL BIT(21) /* RW */ #define PAD_DS_TUNE_DLY_SEL BIT(0) /* RW */ #define PAD_DS_TUNE_DLY1 GENMASK(6, 2) /* RW */ @@ -325,7 +329,8 @@ #define DEFAULT_DEBOUNCE (8) /* 8 cycles CD debounce */ -#define PAD_DELAY_MAX 32 /* PAD delay cells */ +#define PAD_DELAY_HALF 32 /* PAD delay cells */ +#define PAD_DELAY_FULL 64 /*--------------------------------------------------------------------------*/ /* Descriptor Structure */ /*--------------------------------------------------------------------------*/ @@ -461,6 +466,7 @@ struct msdc_host { u32 hs400_ds_dly3; u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */ u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */ + u32 tuning_step; bool hs400_cmd_resp_sel_rising; /* cmd response sample selection for HS400 */ bool hs400_mode; /* current eMMC will run at hs400 mode */ @@ -1615,7 +1621,7 @@ static irqreturn_t msdc_cmdq_irq(struct msdc_host *host, u32 intsts) } if (cmd_err || dat_err) { - dev_err(host->dev, "cmd_err = %d, dat_err =%d, intsts = 0x%x", + dev_err(host->dev, "cmd_err = %d, dat_err = %d, intsts = 0x%x", cmd_err, dat_err, intsts); } @@ -1780,10 +1786,20 @@ static void msdc_init_hw(struct msdc_host *host) DATA_K_VALUE_SEL); sdr_set_bits(host->top_base + EMMC_TOP_CMD, PAD_CMD_RD_RXDLY_SEL); + if (host->tuning_step > PAD_DELAY_HALF) { + sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, + PAD_DAT_RD_RXDLY2_SEL); + sdr_set_bits(host->top_base + EMMC_TOP_CMD, + PAD_CMD_RD_RXDLY2_SEL); + } } else { sdr_set_bits(host->base + tune_reg, MSDC_PAD_TUNE_RD_SEL | MSDC_PAD_TUNE_CMD_SEL); + if (host->tuning_step > PAD_DELAY_HALF) + sdr_set_bits(host->base + tune_reg + 4, + MSDC_PAD_TUNE_RD2_SEL | + MSDC_PAD_TUNE_CMD2_SEL); } } else { /* choose clock tune */ @@ -1925,24 +1941,24 @@ static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) msdc_set_mclk(host, ios->timing, ios->clock); } -static u32 test_delay_bit(u32 delay, u32 bit) +static u64 test_delay_bit(u64 delay, u32 bit) { - bit %= PAD_DELAY_MAX; - return delay & BIT(bit); + bit %= PAD_DELAY_FULL; + return delay & BIT_ULL(bit); } -static int get_delay_len(u32 delay, u32 start_bit) +static int get_delay_len(u64 delay, u32 start_bit) { int i; - for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) { + for (i = 0; i < (PAD_DELAY_FULL - start_bit); i++) { if (test_delay_bit(delay, start_bit + i) == 0) return i; } - return PAD_DELAY_MAX - start_bit; + return PAD_DELAY_FULL - start_bit; } -static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay) +static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u64 delay) { int start = 0, len = 0; int start_final = 0, len_final = 0; @@ -1950,28 +1966,28 @@ static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay) struct msdc_delay_phase delay_phase = { 0, }; if (delay == 0) { - dev_err(host->dev, "phase error: [map:%x]\n", delay); + dev_err(host->dev, "phase error: [map:%016llx]\n", delay); delay_phase.final_phase = final_phase; return delay_phase; } - while (start < PAD_DELAY_MAX) { + while (start < PAD_DELAY_FULL) { len = get_delay_len(delay, start); if (len_final < len) { start_final = start; len_final = len; } start += len ? len : 1; - if (len >= 12 && start_final < 4) + if (!upper_32_bits(delay) && len >= 12 && start_final < 4) break; } /* The rule is that to find the smallest delay cell */ if (start_final == 0) - final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX; + final_phase = (start_final + len_final / 3) % PAD_DELAY_FULL; else - final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX; - dev_dbg(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n", + final_phase = (start_final + len_final / 2) % PAD_DELAY_FULL; + dev_dbg(host->dev, "phase: [map:%016llx] [maxlen:%d] [final:%d]\n", delay, len_final, final_phase); delay_phase.maxlen = len_final; @@ -1984,30 +2000,68 @@ static inline void msdc_set_cmd_delay(struct msdc_host *host, u32 value) { u32 tune_reg = host->dev_comp->pad_tune_reg; - if (host->top_base) - sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY, - value); - else - sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY, - value); + if (host->top_base) { + if (value < PAD_DELAY_HALF) { + sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY, + value); + sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY2, + 0); + } else { + sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY, + PAD_DELAY_HALF - 1); + sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY2, + value - PAD_DELAY_HALF); + } + } else { + if (value < PAD_DELAY_HALF) { + sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY, + value); + sdr_set_field(host->base + tune_reg + 4, MSDC_PAD_TUNE_CMDRDLY2, + 0); + } else { + sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY, + PAD_DELAY_HALF - 1); + sdr_set_field(host->base + tune_reg + 4, MSDC_PAD_TUNE_CMDRDLY2, + value - PAD_DELAY_HALF); + } + } } static inline void msdc_set_data_delay(struct msdc_host *host, u32 value) { u32 tune_reg = host->dev_comp->pad_tune_reg; - if (host->top_base) - sdr_set_field(host->top_base + EMMC_TOP_CONTROL, - PAD_DAT_RD_RXDLY, value); - else - sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY, - value); + if (host->top_base) { + if (value < PAD_DELAY_HALF) { + sdr_set_field(host->top_base + EMMC_TOP_CONTROL, + PAD_DAT_RD_RXDLY, value); + sdr_set_field(host->top_base + EMMC_TOP_CONTROL, + PAD_DAT_RD_RXDLY2, 0); + } else { + sdr_set_field(host->top_base + EMMC_TOP_CONTROL, + PAD_DAT_RD_RXDLY, PAD_DELAY_HALF - 1); + sdr_set_field(host->top_base + EMMC_TOP_CONTROL, + PAD_DAT_RD_RXDLY2, value - PAD_DELAY_HALF); + } + } else { + if (value < PAD_DELAY_HALF) { + sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY, + value); + sdr_set_field(host->base + tune_reg + 4, MSDC_PAD_TUNE_DATRRDLY2, + 0); + } else { + sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY, + PAD_DELAY_HALF - 1); + sdr_set_field(host->base + tune_reg + 4, MSDC_PAD_TUNE_DATRRDLY2, + value - PAD_DELAY_HALF); + } + } } static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) { struct msdc_host *host = mmc_priv(mmc); - u32 rise_delay = 0, fall_delay = 0; + u64 rise_delay = 0, fall_delay = 0; struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; struct msdc_delay_phase internal_delay_phase; u8 final_delay, final_maxlen; @@ -2023,7 +2077,7 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) host->hs200_cmd_int_delay); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); - for (i = 0 ; i < PAD_DELAY_MAX; i++) { + for (i = 0; i < host->tuning_step; i++) { msdc_set_cmd_delay(host, i); /* * Using the same parameters, it may sometimes pass the test, @@ -2033,9 +2087,9 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) for (j = 0; j < 3; j++) { mmc_send_tuning(mmc, opcode, &cmd_err); if (!cmd_err) { - rise_delay |= BIT(i); + rise_delay |= BIT_ULL(i); } else { - rise_delay &= ~BIT(i); + rise_delay &= ~BIT_ULL(i); break; } } @@ -2047,7 +2101,7 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) goto skip_fall; sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); - for (i = 0; i < PAD_DELAY_MAX; i++) { + for (i = 0; i < host->tuning_step; i++) { msdc_set_cmd_delay(host, i); /* * Using the same parameters, it may sometimes pass the test, @@ -2057,9 +2111,9 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) for (j = 0; j < 3; j++) { mmc_send_tuning(mmc, opcode, &cmd_err); if (!cmd_err) { - fall_delay |= BIT(i); + fall_delay |= BIT_ULL(i); } else { - fall_delay &= ~BIT(i); + fall_delay &= ~BIT_ULL(i); break; } } @@ -2082,12 +2136,12 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay) goto skip_internal; - for (i = 0; i < PAD_DELAY_MAX; i++) { + for (i = 0; i < host->tuning_step; i++) { sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY, i); mmc_send_tuning(mmc, opcode, &cmd_err); if (!cmd_err) - internal_delay |= BIT(i); + internal_delay |= BIT_ULL(i); } dev_dbg(host->dev, "Final internal delay: 0x%x\n", internal_delay); internal_delay_phase = get_best_delay(host, internal_delay); @@ -2121,7 +2175,8 @@ static int hs400_tune_response(struct mmc_host *mmc, u32 opcode) sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); else sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); - for (i = 0 ; i < PAD_DELAY_MAX; i++) { + + for (i = 0; i < PAD_DELAY_HALF; i++) { sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3, i); /* @@ -2151,7 +2206,7 @@ static int hs400_tune_response(struct mmc_host *mmc, u32 opcode) static int msdc_tune_data(struct mmc_host *mmc, u32 opcode) { struct msdc_host *host = mmc_priv(mmc); - u32 rise_delay = 0, fall_delay = 0; + u64 rise_delay = 0, fall_delay = 0; struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; u8 final_delay, final_maxlen; int i, ret; @@ -2160,11 +2215,11 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode) host->latch_ck); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); - for (i = 0 ; i < PAD_DELAY_MAX; i++) { + for (i = 0; i < host->tuning_step; i++) { msdc_set_data_delay(host, i); ret = mmc_send_tuning(mmc, opcode, NULL); if (!ret) - rise_delay |= BIT(i); + rise_delay |= BIT_ULL(i); } final_rise_delay = get_best_delay(host, rise_delay); /* if rising edge has enough margin, then do not scan falling edge */ @@ -2174,11 +2229,11 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode) sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); - for (i = 0; i < PAD_DELAY_MAX; i++) { + for (i = 0; i < host->tuning_step; i++) { msdc_set_data_delay(host, i); ret = mmc_send_tuning(mmc, opcode, NULL); if (!ret) - fall_delay |= BIT(i); + fall_delay |= BIT_ULL(i); } final_fall_delay = get_best_delay(host, fall_delay); @@ -2206,7 +2261,7 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode) static int msdc_tune_together(struct mmc_host *mmc, u32 opcode) { struct msdc_host *host = mmc_priv(mmc); - u32 rise_delay = 0, fall_delay = 0; + u64 rise_delay = 0, fall_delay = 0; struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; u8 final_delay, final_maxlen; int i, ret; @@ -2217,12 +2272,12 @@ static int msdc_tune_together(struct mmc_host *mmc, u32 opcode) sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); - for (i = 0 ; i < PAD_DELAY_MAX; i++) { + for (i = 0; i < host->tuning_step; i++) { msdc_set_cmd_delay(host, i); msdc_set_data_delay(host, i); ret = mmc_send_tuning(mmc, opcode, NULL); if (!ret) - rise_delay |= BIT(i); + rise_delay |= BIT_ULL(i); } final_rise_delay = get_best_delay(host, rise_delay); /* if rising edge has enough margin, then do not scan falling edge */ @@ -2233,12 +2288,12 @@ static int msdc_tune_together(struct mmc_host *mmc, u32 opcode) sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); - for (i = 0; i < PAD_DELAY_MAX; i++) { + for (i = 0; i < host->tuning_step; i++) { msdc_set_cmd_delay(host, i); msdc_set_data_delay(host, i); ret = mmc_send_tuning(mmc, opcode, NULL); if (!ret) - fall_delay |= BIT(i); + fall_delay |= BIT_ULL(i); } final_fall_delay = get_best_delay(host, fall_delay); @@ -2346,7 +2401,7 @@ static int msdc_execute_hs400_tuning(struct mmc_host *mmc, struct mmc_card *card } host->hs400_tuning = true; - for (i = 0; i < PAD_DELAY_MAX; i++) { + for (i = 0; i < PAD_DELAY_HALF; i++) { if (host->top_base) sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE, PAD_DS_DLY1, i); @@ -2601,6 +2656,10 @@ static void msdc_of_property_parse(struct platform_device *pdev, else host->hs400_cmd_resp_sel_rising = false; + if (of_property_read_u32(pdev->dev.of_node, "mediatek,tuning-step", + &host->tuning_step)) + host->tuning_step = PAD_DELAY_HALF; + if (of_property_read_bool(pdev->dev.of_node, "supports-cqe")) host->cqhci = true;