From patchwork Thu Oct 8 05:12:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Faiz Abbas X-Patchwork-Id: 1378394 X-Patchwork-Delegate: lokeshvutla@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=85.214.62.61; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=ti.com header.i=@ti.com header.a=rsa-sha256 header.s=ti-com-17Q1 header.b=we3Uoi3H; dkim-atps=neutral Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4C6KBN357vz9sTK for ; Thu, 8 Oct 2020 16:14:20 +1100 (AEDT) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 33AC4823AF; Thu, 8 Oct 2020 07:13:28 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (1024-bit key; unprotected) header.d=ti.com header.i=@ti.com header.b="we3Uoi3H"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id E3239823AF; Thu, 8 Oct 2020 07:13:26 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,SPF_HELO_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 007D4823CC for ; Thu, 8 Oct 2020 07:13:23 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=faiz_abbas@ti.com Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 0985DMLm003110; Thu, 8 Oct 2020 00:13:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1602134002; bh=TKC1dftTvD4vbOxfsqG7SCq80DGlDhL9+9cnnjZsCfg=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=we3Uoi3H2mb4JDgMoKMqv28UH82MhynHEKUuoJ5+qvOyAdwm9Ab3cGsNxO2Hkt6AD STPNBM7BDS0hBSUmrR5sLoRg+BiHT+TJ8+9KGSJP6wxO1W8HgU2p/p8DRf0cR/aOLI JHPV4qL4EC6RQKX20qZzogkU5gjgICyPfXk1z6bs= Received: from DFLE100.ent.ti.com (dfle100.ent.ti.com [10.64.6.21]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 0985DMXU013208 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 8 Oct 2020 00:13:22 -0500 Received: from DFLE100.ent.ti.com (10.64.6.21) by DFLE100.ent.ti.com (10.64.6.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 8 Oct 2020 00:13:22 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE100.ent.ti.com (10.64.6.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Thu, 8 Oct 2020 00:13:22 -0500 Received: from a0230074-Latitude-E7470.ent.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0985Cpxi022642; Thu, 8 Oct 2020 00:13:19 -0500 From: Faiz Abbas To: , , CC: Subject: [PATCH 06/17] mmc: am654_sdhci: Add support for input tap delay Date: Thu, 8 Oct 2020 10:42:39 +0530 Message-ID: <20201008051250.25784-7-faiz_abbas@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201008051250.25784-1-faiz_abbas@ti.com> References: <20201008051250.25784-1-faiz_abbas@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.34 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.102.3 at phobos.denx.de X-Virus-Status: Clean DLL need only be enabled for speed modes and clock frequencies at or above 50 MHz. For speed modes that don't enable the DLL, we need to configure a static input delay value. This involves reading an optional itap-del-sel-* value from the device tree and configuring it for the appropriate speed mode. Therefore, move all dll configurations to their own functions and gate it with 50 MHz speed and a minimum mode. If both these conditions are not satisfied then configure delay chain modes. Signed-off-by: Faiz Abbas --- drivers/mmc/am654_sdhci.c | 241 +++++++++++++++++++++++++------------- 1 file changed, 161 insertions(+), 80 deletions(-) diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c index 71798be765..f472672152 100644 --- a/drivers/mmc/am654_sdhci.c +++ b/drivers/mmc/am654_sdhci.c @@ -62,6 +62,16 @@ #define CALDONE_MASK BIT(CALDONE_SHIFT) #define RETRIM_SHIFT 17 #define RETRIM_MASK BIT(RETRIM_SHIFT) +#define SELDLYTXCLK_SHIFT 17 +#define SELDLYTXCLK_MASK BIT(SELDLYTXCLK_SHIFT) +#define SELDLYRXCLK_SHIFT 16 +#define SELDLYRXCLK_MASK BIT(SELDLYRXCLK_SHIFT) +#define ITAPDLYSEL_SHIFT 0 +#define ITAPDLYSEL_MASK GENMASK(4, 0) +#define ITAPDLYENA_SHIFT 8 +#define ITAPDLYENA_MASK BIT(ITAPDLYENA_SHIFT) +#define ITAPCHGWIN_SHIFT 9 +#define ITAPCHGWIN_MASK BIT(ITAPCHGWIN_SHIFT) #define DRIVER_STRENGTH_50_OHM 0x0 #define DRIVER_STRENGTH_33_OHM 0x1 @@ -70,6 +80,7 @@ #define DRIVER_STRENGTH_40_OHM 0x4 #define AM654_SDHCI_MIN_FREQ 400000 +#define CLOCK_TOO_SLOW_HZ 50000000 struct am654_sdhci_plat { struct mmc_config cfg; @@ -77,6 +88,7 @@ struct am654_sdhci_plat { struct regmap *base; bool non_removable; u32 otap_del_sel[MMC_MODES_END]; + u32 itap_del_sel[MMC_MODES_END]; u32 trm_icp; u32 drv_strength; u32 strb_sel; @@ -89,22 +101,45 @@ struct am654_sdhci_plat { }; struct timing_data { - const char *binding; + const char *otap_binding; + const char *itap_binding; u32 capability; }; static const struct timing_data td[] = { - [MMC_LEGACY] = {"ti,otap-del-sel-legacy", 0}, - [MMC_HS] = {"ti,otap-del-sel-mmc-hs", MMC_CAP(MMC_HS)}, - [SD_HS] = {"ti,otap-del-sel-sd-hs", MMC_CAP(SD_HS)}, - [UHS_SDR12] = {"ti,otap-del-sel-sdr12", MMC_CAP(UHS_SDR12)}, - [UHS_SDR25] = {"ti,otap-del-sel-sdr25", MMC_CAP(UHS_SDR25)}, - [UHS_SDR50] = {"ti,otap-del-sel-sdr50", MMC_CAP(UHS_SDR50)}, - [UHS_SDR104] = {"ti,otap-del-sel-sdr104", MMC_CAP(UHS_SDR104)}, - [UHS_DDR50] = {"ti,otap-del-sel-ddr50", MMC_CAP(UHS_DDR50)}, - [MMC_DDR_52] = {"ti,otap-del-sel-ddr52", MMC_CAP(MMC_DDR_52)}, - [MMC_HS_200] = {"ti,otap-del-sel-hs200", MMC_CAP(MMC_HS_200)}, - [MMC_HS_400] = {"ti,otap-del-sel-hs400", MMC_CAP(MMC_HS_400)}, + [MMC_LEGACY] = {"ti,otap-del-sel-legacy", + "ti,itap-del-sel-legacy", + 0}, + [MMC_HS] = {"ti,otap-del-sel-mmc-hs", + "ti,itap-del-sel-mms-hs", + MMC_CAP(MMC_HS)}, + [SD_HS] = {"ti,otap-del-sel-sd-hs", + "ti,itap-del-sel-sd-hs", + MMC_CAP(SD_HS)}, + [UHS_SDR12] = {"ti,otap-del-sel-sdr12", + "ti,itap-del-sel-sdr12", + MMC_CAP(UHS_SDR12)}, + [UHS_SDR25] = {"ti,otap-del-sel-sdr25", + "ti,itap-del-sel-sdr25", + MMC_CAP(UHS_SDR25)}, + [UHS_SDR50] = {"ti,otap-del-sel-sdr50", + NULL, + MMC_CAP(UHS_SDR50)}, + [UHS_SDR104] = {"ti,otap-del-sel-sdr104", + NULL, + MMC_CAP(UHS_SDR104)}, + [UHS_DDR50] = {"ti,otap-del-sel-ddr50", + NULL, + MMC_CAP(UHS_DDR50)}, + [MMC_DDR_52] = {"ti,otap-del-sel-ddr52", + "ti,itap-del-sel-ddr52", + MMC_CAP(MMC_DDR_52)}, + [MMC_HS_200] = {"ti,otap-del-sel-hs200", + NULL, + MMC_CAP(MMC_HS_200)}, + [MMC_HS_400] = {"ti,otap-del-sel-hs400", + NULL, + MMC_CAP(MMC_HS_400)}, }; struct am654_driver_data { @@ -127,12 +162,99 @@ static void am654_sdhci_set_control_reg(struct sdhci_host *host) sdhci_set_uhs_timing(host); } +static int am654_sdhci_setup_dll(struct am654_sdhci_plat *plat, + unsigned int speed) +{ + int sel50, sel100, freqsel; + u32 mask, val; + int ret; + + /* Disable delay chain mode */ + regmap_update_bits(plat->base, PHY_CTRL5, + SELDLYTXCLK_MASK | SELDLYRXCLK_MASK, 0); + + if (plat->flags & FREQSEL_2_BIT) { + switch (speed) { + case 200000000: + sel50 = 0; + sel100 = 0; + break; + case 100000000: + sel50 = 0; + sel100 = 1; + break; + default: + sel50 = 1; + sel100 = 0; + } + + /* Configure PHY DLL frequency */ + mask = SEL50_MASK | SEL100_MASK; + val = (sel50 << SEL50_SHIFT) | (sel100 << SEL100_SHIFT); + regmap_update_bits(plat->base, PHY_CTRL5, mask, val); + } else { + switch (speed) { + case 200000000: + freqsel = 0x0; + break; + default: + freqsel = 0x4; + } + regmap_update_bits(plat->base, PHY_CTRL5, FREQSEL_MASK, + freqsel << FREQSEL_SHIFT); + } + + /* Configure DLL TRIM */ + mask = DLL_TRIM_ICP_MASK; + val = plat->trm_icp << DLL_TRIM_ICP_SHIFT; + + /* Configure DLL driver strength */ + mask |= DR_TY_MASK; + val |= plat->drv_strength << DR_TY_SHIFT; + regmap_update_bits(plat->base, PHY_CTRL1, mask, val); + + /* Enable DLL */ + regmap_update_bits(plat->base, PHY_CTRL1, ENDLL_MASK, + 0x1 << ENDLL_SHIFT); + /* + * Poll for DLL ready. Use a one second timeout. + * Works in all experiments done so far + */ + ret = regmap_read_poll_timeout(plat->base, PHY_STAT1, val, + val & DLLRDY_MASK, 1000, 1000000); + + return ret; +} + +static void am654_sdhci_write_itapdly(struct am654_sdhci_plat *plat, + u32 itapdly) +{ + /* Set ITAPCHGWIN before writing to ITAPDLY */ + regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK, + 1 << ITAPCHGWIN_SHIFT); + regmap_update_bits(plat->base, PHY_CTRL4, ITAPDLYSEL_MASK, + itapdly << ITAPDLYSEL_SHIFT); + regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK, 0); +} + +static void am654_sdhci_setup_delay_chain(struct am654_sdhci_plat *plat, + int mode) +{ + u32 mask, val; + + val = 1 << SELDLYTXCLK_SHIFT | 1 << SELDLYRXCLK_SHIFT; + mask = SELDLYTXCLK_MASK | SELDLYRXCLK_MASK; + regmap_update_bits(plat->base, PHY_CTRL5, mask, val); + + am654_sdhci_write_itapdly(plat, plat->itap_del_sel[mode]); +} + static int am654_sdhci_set_ios_post(struct sdhci_host *host) { struct udevice *dev = host->mmc->dev; struct am654_sdhci_plat *plat = dev_get_platdata(dev); unsigned int speed = host->mmc->clock; - int sel50, sel100, freqsel; + int mode = host->mmc->selected_mode; u32 otap_del_sel; u32 mask, val; int ret; @@ -148,75 +270,29 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host) sdhci_set_clock(host->mmc, speed); /* switch phy back on */ - if (speed > AM654_SDHCI_MIN_FREQ) { - otap_del_sel = plat->otap_del_sel[host->mmc->selected_mode]; - mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; - val = (1 << OTAPDLYENA_SHIFT) | - (otap_del_sel << OTAPDLYSEL_SHIFT); - - /* Write to STRBSEL for HS400 speed mode */ - if (host->mmc->selected_mode == MMC_HS_400) { - if (plat->flags & STRBSEL_4_BIT) - mask |= STRBSEL_4BIT_MASK; - else - mask |= STRBSEL_8BIT_MASK; - - val |= plat->strb_sel << STRBSEL_SHIFT; - } + otap_del_sel = plat->otap_del_sel[mode]; + mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; + val = (1 << OTAPDLYENA_SHIFT) | + (otap_del_sel << OTAPDLYSEL_SHIFT); - regmap_update_bits(plat->base, PHY_CTRL4, mask, val); - - if (plat->flags & FREQSEL_2_BIT) { - switch (speed) { - case 200000000: - sel50 = 0; - sel100 = 0; - break; - case 100000000: - sel50 = 0; - sel100 = 1; - break; - default: - sel50 = 1; - sel100 = 0; - } - - /* Configure PHY DLL frequency */ - mask = SEL50_MASK | SEL100_MASK; - val = (sel50 << SEL50_SHIFT) | (sel100 << SEL100_SHIFT); - regmap_update_bits(plat->base, PHY_CTRL5, mask, val); - } else { - switch (speed) { - case 200000000: - freqsel = 0x0; - break; - default: - freqsel = 0x4; - } - regmap_update_bits(plat->base, PHY_CTRL5, FREQSEL_MASK, - freqsel << FREQSEL_SHIFT); - } + /* Write to STRBSEL for HS400 speed mode */ + if (host->mmc->selected_mode == MMC_HS_400) { + if (plat->flags & STRBSEL_4_BIT) + mask |= STRBSEL_4BIT_MASK; + else + mask |= STRBSEL_8BIT_MASK; - /* Configure DLL TRIM */ - mask = DLL_TRIM_ICP_MASK; - val = plat->trm_icp << DLL_TRIM_ICP_SHIFT; - - /* Configure DLL driver strength */ - mask |= DR_TY_MASK; - val |= plat->drv_strength << DR_TY_SHIFT; - regmap_update_bits(plat->base, PHY_CTRL1, mask, val); - - /* Enable DLL */ - regmap_update_bits(plat->base, PHY_CTRL1, ENDLL_MASK, - 0x1 << ENDLL_SHIFT); - /* - * Poll for DLL ready. Use a one second timeout. - * Works in all experiments done so far - */ - ret = regmap_read_poll_timeout(plat->base, PHY_STAT1, val, - val & DLLRDY_MASK, 1000, 1000000); + val |= plat->strb_sel << STRBSEL_SHIFT; + } + + regmap_update_bits(plat->base, PHY_CTRL4, mask, val); + + if (mode > UHS_SDR25 && speed >= CLOCK_TOO_SLOW_HZ) { + ret = am654_sdhci_setup_dll(plat, speed); if (ret) return ret; + } else { + am654_sdhci_setup_delay_chain(plat, mode); } return 0; @@ -354,15 +430,20 @@ static int sdhci_am654_get_otap_delay(struct udevice *dev, * value is not found */ for (i = MMC_HS; i <= MMC_HS_400; i++) { - ret = dev_read_u32(dev, td[i].binding, &plat->otap_del_sel[i]); + ret = dev_read_u32(dev, td[i].otap_binding, + &plat->otap_del_sel[i]); if (ret) { - dev_dbg(dev, "Couldn't find %s\n", td[i].binding); + dev_dbg(dev, "Couldn't find %s\n", td[i].otap_binding); /* * Remove the corresponding capability * if an otap-del-sel value is not found */ cfg->host_caps &= ~td[i].capability; } + + if (td[i].itap_binding) + dev_read_u32(dev, td[i].itap_binding, + &plat->itap_del_sel[i]); } return 0;