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[23.128.96.18]) by mx.google.com with ESMTP id m1si428716ejj.523.2020.07.24.04.33.09; Fri, 24 Jul 2020 04:33:32 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=fail header.i=@microchip.com header.s=mchp header.b=NLN8gZed; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=microchip.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726617AbgGXLc2 (ORCPT + 99 others); Fri, 24 Jul 2020 07:32:28 -0400 Received: from esa3.microchip.iphmx.com ([68.232.153.233]:25047 "EHLO esa3.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726280AbgGXLc2 (ORCPT ); Fri, 24 Jul 2020 07:32:28 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1595590347; x=1627126347; h=references:from:to:cc:subject:in-reply-to:date: message-id:mime-version; bh=BjoAEaIor1zrZmYBGxOQZdTAdswFGI4g5Rket3zltvg=; b=NLN8gZed/0TzDR52C6LGisXjQbDQl8YACIGGADA+f9U59WwUm2zEUDKy 3FFKcRF3QaafUJgazFkWvWy58w0CIt/unA91CwDiQ2kDzY7aRSYUw4Tot n46GZXUJePpVPB7U/TUhxEOZ4ob9dFcv1+Td31GOUnUdpYJbG892M9HZT 9vKBrAJwh6i9ZPqMbSJvL3HwjUy9XtD+fgw8MAz1xrEuAwd2ZUNH4Fdgg NIB9fqOrn9rrrZp0Z31ssJPi0vWMs6bPF/Z8L/lEPPUN4WaxW9abhsIOu GVTdtfHMRpCFJ/9qwUK3i2kZEnWjk3nNFjgIZSiKCgDaY5mqX1hUkReGm w==; IronPort-SDR: Iil8V1Zn+XMZHxEe+yDy6d3ZL752MSKvV8tnx7LpLlCMNTLPbh8VKy8fnKomZg2Wu3G2zhyaH4 vJMiOfaxRPrZOgSs9bYbqoS8xpFjyHu08od+KrJLAi0yfQcX160IyxarkKKrUxA5dKuFlUjLAx oD9Mxq9afYl7J8Cpa5Dxnz1UzQI1eXDSreh/xETxiZOKGN5imNu1CPy2k23qkW3D8lQL7ZdTeL DACSyddPEtzrJqd7pj9laGB3Hwl3iHrEoJ17LRJ1xNz5RdecEOP0KW+W3ZrRi6i9huqjWJ4fTY GSI= X-IronPort-AV: E=Sophos;i="5.75,390,1589266800"; d="scan'208";a="85240826" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 24 Jul 2020 04:32:20 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 24 Jul 2020 04:32:20 -0700 Received: from soft-dev15.microsemi.net.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3 via Frontend Transport; Fri, 24 Jul 2020 04:31:36 -0700 References: <20200618141326.25723-1-lars.povlsen@microchip.com> <20200618141326.25723-3-lars.povlsen@microchip.com> <87wo2vkbns.fsf@soft-dev15.microsemi.net> From: Lars Povlsen To: Ulf Hansson CC: Lars Povlsen , Adrian Hunter , SoC Team , "Microchip Linux Driver Support" , "linux-mmc@vger.kernel.org" , DTML , Linux ARM , Linux Kernel Mailing List , Alexandre Belloni Subject: Re: [PATCH v4 2/3] sdhci: sparx5: Add Sparx5 SoC eMMC driver In-Reply-To: Date: Fri, 24 Jul 2020 13:32:15 +0200 Message-ID: <87zh7pf8sg.fsf@soft-dev15.microsemi.net> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ulf Hansson writes: > On Wed, 22 Jul 2020 at 13:54, Lars Povlsen wrote: >> >> >> Adrian Hunter writes: >> >> > On 18/06/20 5:13 pm, Lars Povlsen wrote: >> >> This adds the eMMC driver for the Sparx5 SoC. It is based upon the >> >> designware IP, but requires some extra initialization and quirks. >> >> >> >> Signed-off-by: Lars Povlsen >> > >> > Acked-by: Adrian Hunter >> > >> >> Adrian, >> >> Thanks for the ack. I was expecting to see this in linux-next, anything >> holding it back? >> >> pinctrl and hwmon drivers have been merged. >> >> Thanks, > > Hi Lars, > > Looks like you got some feedback on the DT patch (patch1/3) from Rob. > I didn't find that you have addressed them and therefore I am holding > back on the $subject patch as well. > Uffe, thank you for responding. The automated checker complains about the inclusion of a header file (#include ) in the example. The header file itself is part of the "parent" patch series sent to arm-soc, but is needed to make the example complete. I e-mailed Rob about how to handle this, but never got a reply. Can you suggest how to deal with this? I have checked the schema with dt_binding_check manually - with the header file in place. I can of course remove the include and associated properties, but that will make the example incomplete and irrelevant. ---Lars > Please fix the DT patch and re-submit a new version of the series. > > Kind regards > Uffe > > >> >> ---Lars >> >> >> --- >> >> drivers/mmc/host/Kconfig | 13 ++ >> >> drivers/mmc/host/Makefile | 1 + >> >> drivers/mmc/host/sdhci-of-sparx5.c | 269 +++++++++++++++++++++++++++++ >> >> 3 files changed, 283 insertions(+) >> >> create mode 100644 drivers/mmc/host/sdhci-of-sparx5.c >> >> >> >> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig >> >> index 3b706af35ec31..a3bad4b4ed7ea 100644 >> >> --- a/drivers/mmc/host/Kconfig >> >> +++ b/drivers/mmc/host/Kconfig >> >> @@ -213,6 +213,19 @@ config MMC_SDHCI_OF_DWCMSHC >> >> If you have a controller with this interface, say Y or M here. >> >> If unsure, say N. >> >> >> >> +config MMC_SDHCI_OF_SPARX5 >> >> + tristate "SDHCI OF support for the MCHP Sparx5 SoC" >> >> + depends on MMC_SDHCI_PLTFM >> >> + depends on ARCH_SPARX5 >> >> + select MMC_SDHCI_IO_ACCESSORS >> >> + help >> >> + This selects the Secure Digital Host Controller Interface (SDHCI) >> >> + found in the MCHP Sparx5 SoC. >> >> + >> >> + If you have a Sparx5 SoC with this interface, say Y or M here. >> >> + >> >> + If unsure, say N. >> >> + >> >> config MMC_SDHCI_CADENCE >> >> tristate "SDHCI support for the Cadence SD/SDIO/eMMC controller" >> >> depends on MMC_SDHCI_PLTFM >> >> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile >> >> index 4d5bcb0144a0a..451c25fc2c692 100644 >> >> --- a/drivers/mmc/host/Makefile >> >> +++ b/drivers/mmc/host/Makefile >> >> @@ -94,6 +94,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_AT91) += sdhci-of-at91.o >> >> obj-$(CONFIG_MMC_SDHCI_OF_ESDHC) += sdhci-of-esdhc.o >> >> obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o >> >> obj-$(CONFIG_MMC_SDHCI_OF_DWCMSHC) += sdhci-of-dwcmshc.o >> >> +obj-$(CONFIG_MMC_SDHCI_OF_SPARX5) += sdhci-of-sparx5.o >> >> obj-$(CONFIG_MMC_SDHCI_BCM_KONA) += sdhci-bcm-kona.o >> >> obj-$(CONFIG_MMC_SDHCI_IPROC) += sdhci-iproc.o >> >> obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o >> >> diff --git a/drivers/mmc/host/sdhci-of-sparx5.c b/drivers/mmc/host/sdhci-of-sparx5.c >> >> new file mode 100644 >> >> index 0000000000000..2b262c12e5530 >> >> --- /dev/null >> >> +++ b/drivers/mmc/host/sdhci-of-sparx5.c >> >> @@ -0,0 +1,269 @@ >> >> +// SPDX-License-Identifier: GPL-2.0-or-later >> >> +/* >> >> + * drivers/mmc/host/sdhci-of-sparx5.c >> >> + * >> >> + * MCHP Sparx5 SoC Secure Digital Host Controller Interface. >> >> + * >> >> + * Copyright (c) 2019 Microchip Inc. >> >> + * >> >> + * Author: Lars Povlsen >> >> + */ >> >> + >> >> +#include >> >> +#include >> >> +#include >> >> +#include >> >> +#include >> >> +#include >> >> +#include >> >> + >> >> +#include "sdhci-pltfm.h" >> >> + >> >> +#define CPU_REGS_GENERAL_CTRL (0x22 * 4) >> >> +#define MSHC_DLY_CC_MASK GENMASK(16, 13) >> >> +#define MSHC_DLY_CC_SHIFT 13 >> >> +#define MSHC_DLY_CC_MAX 15 >> >> + >> >> +#define CPU_REGS_PROC_CTRL (0x2C * 4) >> >> +#define ACP_CACHE_FORCE_ENA BIT(4) >> >> +#define ACP_AWCACHE BIT(3) >> >> +#define ACP_ARCACHE BIT(2) >> >> +#define ACP_CACHE_MASK (ACP_CACHE_FORCE_ENA|ACP_AWCACHE|ACP_ARCACHE) >> >> + >> >> +#define MSHC2_VERSION 0x500 /* Off 0x140, reg 0x0 */ >> >> +#define MSHC2_TYPE 0x504 /* Off 0x140, reg 0x1 */ >> >> +#define MSHC2_EMMC_CTRL 0x52c /* Off 0x140, reg 0xB */ >> >> +#define MSHC2_EMMC_CTRL_EMMC_RST_N BIT(2) >> >> +#define MSHC2_EMMC_CTRL_IS_EMMC BIT(0) >> >> + >> >> +struct sdhci_sparx5_data { >> >> + struct sdhci_host *host; >> >> + struct regmap *cpu_ctrl; >> >> + int delay_clock; >> >> +}; >> >> + >> >> +#define BOUNDARY_OK(addr, len) \ >> >> + ((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1))) >> >> + >> >> +/* >> >> + * If DMA addr spans 128MB boundary, we split the DMA transfer into two >> >> + * so that each DMA transfer doesn't exceed the boundary. >> >> + */ >> >> +static void sdhci_sparx5_adma_write_desc(struct sdhci_host *host, void **desc, >> >> + dma_addr_t addr, int len, >> >> + unsigned int cmd) >> >> +{ >> >> + int tmplen, offset; >> >> + >> >> + if (likely(!len || BOUNDARY_OK(addr, len))) { >> >> + sdhci_adma_write_desc(host, desc, addr, len, cmd); >> >> + return; >> >> + } >> >> + >> >> + pr_debug("%s: write_desc: splitting dma len %d, offset 0x%0llx\n", >> >> + mmc_hostname(host->mmc), len, addr); >> >> + >> >> + offset = addr & (SZ_128M - 1); >> >> + tmplen = SZ_128M - offset; >> >> + sdhci_adma_write_desc(host, desc, addr, tmplen, cmd); >> >> + >> >> + addr += tmplen; >> >> + len -= tmplen; >> >> + sdhci_adma_write_desc(host, desc, addr, len, cmd); >> >> +} >> >> + >> >> +static void sparx5_set_cacheable(struct sdhci_host *host, u32 value) >> >> +{ >> >> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); >> >> + struct sdhci_sparx5_data *sdhci_sparx5 = sdhci_pltfm_priv(pltfm_host); >> >> + >> >> + pr_debug("%s: Set Cacheable = 0x%x\n", mmc_hostname(host->mmc), value); >> >> + >> >> + /* Update ACP caching attributes in HW */ >> >> + regmap_update_bits(sdhci_sparx5->cpu_ctrl, >> >> + CPU_REGS_PROC_CTRL, ACP_CACHE_MASK, value); >> >> +} >> >> + >> >> +static void sparx5_set_delay(struct sdhci_host *host, u8 value) >> >> +{ >> >> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); >> >> + struct sdhci_sparx5_data *sdhci_sparx5 = sdhci_pltfm_priv(pltfm_host); >> >> + >> >> + pr_debug("%s: Set DLY_CC = %u\n", mmc_hostname(host->mmc), value); >> >> + >> >> + /* Update DLY_CC in HW */ >> >> + regmap_update_bits(sdhci_sparx5->cpu_ctrl, >> >> + CPU_REGS_GENERAL_CTRL, >> >> + MSHC_DLY_CC_MASK, >> >> + (value << MSHC_DLY_CC_SHIFT)); >> >> +} >> >> + >> >> +static void sdhci_sparx5_set_emmc(struct sdhci_host *host) >> >> +{ >> >> + if (!mmc_card_is_removable(host->mmc)) { >> >> + u8 value; >> >> + >> >> + value = sdhci_readb(host, MSHC2_EMMC_CTRL); >> >> + if (!(value & MSHC2_EMMC_CTRL_IS_EMMC)) { >> >> + value |= MSHC2_EMMC_CTRL_IS_EMMC; >> >> + pr_debug("%s: Set EMMC_CTRL: 0x%08x\n", >> >> + mmc_hostname(host->mmc), value); >> >> + sdhci_writeb(host, value, MSHC2_EMMC_CTRL); >> >> + } >> >> + } >> >> +} >> >> + >> >> +static void sdhci_sparx5_reset_emmc(struct sdhci_host *host) >> >> +{ >> >> + u8 value; >> >> + >> >> + pr_debug("%s: Toggle EMMC_CTRL.EMMC_RST_N\n", mmc_hostname(host->mmc)); >> >> + value = sdhci_readb(host, MSHC2_EMMC_CTRL) & >> >> + ~MSHC2_EMMC_CTRL_EMMC_RST_N; >> >> + sdhci_writeb(host, value, MSHC2_EMMC_CTRL); >> >> + /* For eMMC, minimum is 1us but give it 10us for good measure */ >> >> + usleep_range(10, 20); >> >> + sdhci_writeb(host, value | MSHC2_EMMC_CTRL_EMMC_RST_N, >> >> + MSHC2_EMMC_CTRL); >> >> + /* For eMMC, minimum is 200us but give it 300us for good measure */ >> >> + usleep_range(300, 400); >> >> +} >> >> + >> >> +static void sdhci_sparx5_reset(struct sdhci_host *host, u8 mask) >> >> +{ >> >> + pr_debug("%s: *** RESET: mask %d\n", mmc_hostname(host->mmc), mask); >> >> + >> >> + sdhci_reset(host, mask); >> >> + >> >> + /* Be sure CARD_IS_EMMC stays set */ >> >> + sdhci_sparx5_set_emmc(host); >> >> +} >> >> + >> >> +static const struct sdhci_ops sdhci_sparx5_ops = { >> >> + .set_clock = sdhci_set_clock, >> >> + .set_bus_width = sdhci_set_bus_width, >> >> + .set_uhs_signaling = sdhci_set_uhs_signaling, >> >> + .get_max_clock = sdhci_pltfm_clk_get_max_clock, >> >> + .reset = sdhci_sparx5_reset, >> >> + .adma_write_desc = sdhci_sparx5_adma_write_desc, >> >> +}; >> >> + >> >> +static const struct sdhci_pltfm_data sdhci_sparx5_pdata = { >> >> + .quirks = 0, >> >> + .quirks2 = SDHCI_QUIRK2_HOST_NO_CMD23 | /* Controller issue */ >> >> + SDHCI_QUIRK2_NO_1_8_V, /* No sdr104, ddr50, etc */ >> >> + .ops = &sdhci_sparx5_ops, >> >> +}; >> >> + >> >> +int sdhci_sparx5_probe(struct platform_device *pdev) >> >> +{ >> >> + int ret; >> >> + const char *syscon = "microchip,sparx5-cpu-syscon"; >> >> + struct sdhci_host *host; >> >> + struct sdhci_pltfm_host *pltfm_host; >> >> + struct sdhci_sparx5_data *sdhci_sparx5; >> >> + struct device_node *np = pdev->dev.of_node; >> >> + u32 value; >> >> + u32 extra; >> >> + >> >> + host = sdhci_pltfm_init(pdev, &sdhci_sparx5_pdata, >> >> + sizeof(*sdhci_sparx5)); >> >> + >> >> + if (IS_ERR(host)) >> >> + return PTR_ERR(host); >> >> + >> >> + /* >> >> + * extra adma table cnt for cross 128M boundary handling. >> >> + */ >> >> + extra = DIV_ROUND_UP_ULL(dma_get_required_mask(&pdev->dev), SZ_128M); >> >> + if (extra > SDHCI_MAX_SEGS) >> >> + extra = SDHCI_MAX_SEGS; >> >> + host->adma_table_cnt += extra; >> >> + >> >> + pltfm_host = sdhci_priv(host); >> >> + sdhci_sparx5 = sdhci_pltfm_priv(pltfm_host); >> >> + sdhci_sparx5->host = host; >> >> + >> >> + pltfm_host->clk = devm_clk_get(&pdev->dev, "core"); >> >> + if (IS_ERR(pltfm_host->clk)) { >> >> + ret = PTR_ERR(pltfm_host->clk); >> >> + dev_err(&pdev->dev, "failed to get core clk: %d\n", ret); >> >> + goto free_pltfm; >> >> + } >> >> + ret = clk_prepare_enable(pltfm_host->clk); >> >> + if (ret) >> >> + goto free_pltfm; >> >> + >> >> + if (!of_property_read_u32(np, "microchip,clock-delay", &value) && >> >> + (value > 0 && value <= MSHC_DLY_CC_MAX)) >> >> + sdhci_sparx5->delay_clock = value; >> >> + >> >> + sdhci_get_of_property(pdev); >> >> + >> >> + ret = mmc_of_parse(host->mmc); >> >> + if (ret) >> >> + goto err_clk; >> >> + >> >> + sdhci_sparx5->cpu_ctrl = syscon_regmap_lookup_by_compatible(syscon); >> >> + if (IS_ERR(sdhci_sparx5->cpu_ctrl)) { >> >> + dev_err(&pdev->dev, "No CPU syscon regmap !\n"); >> >> + ret = PTR_ERR(sdhci_sparx5->cpu_ctrl); >> >> + goto err_clk; >> >> + } >> >> + >> >> + if (sdhci_sparx5->delay_clock >= 0) >> >> + sparx5_set_delay(host, sdhci_sparx5->delay_clock); >> >> + >> >> + if (!mmc_card_is_removable(host->mmc)) { >> >> + /* Do a HW reset of eMMC card */ >> >> + sdhci_sparx5_reset_emmc(host); >> >> + /* Update EMMC_CTRL */ >> >> + sdhci_sparx5_set_emmc(host); >> >> + /* If eMMC, disable SD and SDIO */ >> >> + host->mmc->caps2 |= (MMC_CAP2_NO_SDIO|MMC_CAP2_NO_SD); >> >> + } >> >> + >> >> + ret = sdhci_add_host(host); >> >> + if (ret) >> >> + goto err_clk; >> >> + >> >> + /* Set AXI bus master to use un-cached access (for DMA) */ >> >> + if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA) && >> >> + IS_ENABLED(CONFIG_DMA_DECLARE_COHERENT)) >> >> + sparx5_set_cacheable(host, ACP_CACHE_FORCE_ENA); >> >> + >> >> + pr_debug("%s: SDHC version: 0x%08x\n", >> >> + mmc_hostname(host->mmc), sdhci_readl(host, MSHC2_VERSION)); >> >> + pr_debug("%s: SDHC type: 0x%08x\n", >> >> + mmc_hostname(host->mmc), sdhci_readl(host, MSHC2_TYPE)); >> >> + >> >> + return ret; >> >> + >> >> +err_clk: >> >> + clk_disable_unprepare(pltfm_host->clk); >> >> +free_pltfm: >> >> + sdhci_pltfm_free(pdev); >> >> + return ret; >> >> +} >> >> + >> >> +static const struct of_device_id sdhci_sparx5_of_match[] = { >> >> + { .compatible = "microchip,dw-sparx5-sdhci" }, >> >> + { } >> >> +}; >> >> +MODULE_DEVICE_TABLE(of, sdhci_sparx5_of_match); >> >> + >> >> +static struct platform_driver sdhci_sparx5_driver = { >> >> + .driver = { >> >> + .name = "sdhci-sparx5", >> >> + .of_match_table = sdhci_sparx5_of_match, >> >> + .pm = &sdhci_pltfm_pmops, >> >> + }, >> >> + .probe = sdhci_sparx5_probe, >> >> + .remove = sdhci_pltfm_unregister, >> >> +}; >> >> + >> >> +module_platform_driver(sdhci_sparx5_driver); >> >> + >> >> +MODULE_DESCRIPTION("Sparx5 SDHCI OF driver"); >> >> +MODULE_AUTHOR("Lars Povlsen "); >> >> +MODULE_LICENSE("GPL v2"); >> >> >> >> -- >> Lars Povlsen, >> Microchip -- Lars Povlsen, Microchip