From patchwork Fri Mar 4 18:07:24 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Cooper X-Patchwork-Id: 8506781 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 23605C0553 for ; Fri, 4 Mar 2016 18:09:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E80C62017E for ; Fri, 4 Mar 2016 18:09:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9CF2920173 for ; Fri, 4 Mar 2016 18:09:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751431AbcCDSJh (ORCPT ); Fri, 4 Mar 2016 13:09:37 -0500 Received: from 5520-maca-inet1-outside.broadcom.com ([216.31.211.11]:43370 "EHLO mail-irv-18.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751414AbcCDSJg (ORCPT ); Fri, 4 Mar 2016 13:09:36 -0500 Received: from mail-irva-13.broadcom.com (mail-irva-13.broadcom.com [10.11.16.103]) by mail-irv-18.broadcom.com (Postfix) with ESMTP id 4DC03820D9; Fri, 4 Mar 2016 10:09:36 -0800 (PST) Received: from stbsrv-and-3.and.broadcom.com (unknown [10.28.16.21]) by mail-irva-13.broadcom.com (Postfix) with ESMTP id A74FC40FE5; Fri, 4 Mar 2016 10:09:18 -0800 (PST) From: Al Cooper To: ulf.hansson@linaro.org, adrian.hunter@intel.com, linux-mmc@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com Cc: Al Cooper Subject: [PATCH RESEND V3 2/2] mmc: sdhci-brcmstb: Add driver for Broadcom BRCMSTB SoCs Date: Fri, 4 Mar 2016 13:07:24 -0500 Message-Id: <1457114844-18841-1-git-send-email-alcooperx@gmail.com> X-Mailer: git-send-email 1.9.0.138.g2de3478 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Al Cooper --- .../devicetree/bindings/mmc/sdhci-brcmstb.txt | 40 ++++++ MAINTAINERS | 7 + drivers/mmc/host/Kconfig | 11 ++ drivers/mmc/host/Makefile | 1 + drivers/mmc/host/sdhci-brcmstb.c | 154 +++++++++++++++++++++ 5 files changed, 213 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-brcmstb.txt create mode 100644 drivers/mmc/host/sdhci-brcmstb.c diff --git a/Documentation/devicetree/bindings/mmc/sdhci-brcmstb.txt b/Documentation/devicetree/bindings/mmc/sdhci-brcmstb.txt new file mode 100644 index 0000000..f8dd6a9d --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci-brcmstb.txt @@ -0,0 +1,40 @@ +* BROADCOM BRCMSTB/BMIPS SDHCI Controller + +This file documents differences between the core properties in mmc.txt +and the properties used by the sdhci-brcmstb driver. + +Required properties: +- compatible: "brcm,sdhci-brcmstb" + +Optional properties: +- broken-sdr50: The Host Controller's SDR50 mode is broken. +- broken-ddr50: The Host Controller's DDR50 mode is broken. +- broken-64-bit-dma: 64 BIT DMA mode is broken, use 32 BIT DMA. +- broken-timeout-value: The Host Controller CAPABILITY timeout value is incorrrect, use the maximum timeout. + + +Example: + + sdhci@f03e0100 { + compatible = "brcm,sdhci-brcmstb"; + reg = <0xf03e0000 0x100>; + interrupts = <0x0 0x26 0x0>; + interrupt-names = "sdio0_0"; + sdhci,auto-cmd12; + clocks = <0x13>; + clock-names = "sw_sdio"; + broken-sdr50; + }; + + sdhci@f03e0300 { + no-1-8-v; + non-removable; + bus-width = <0x8>; + compatible = "brcm,sdhci-brcmstb"; + reg = <0xf03e0200 0x100>; + interrupts = <0x0 0x27 0x0>; + interrupt-names = "sdio1_0"; + sdhci,auto-cmd12; + clocks = <0x13>; + clock-names = "sw_sdio"; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 30aca4a..2d9c90c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9724,6 +9724,13 @@ F: tools/testing/selftests/seccomp/* K: \bsecure_computing K: \bTIF_SECCOMP\b +SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) Broadcom BRCMSTB DRIVER +M: Al Cooper +L: linux-mmc@vger.kernel.org +L: bcm-kernel-feedback-list@broadcom.com +S: Maintained +F: drivers/mmc/host/sdhci-brcmstb* + SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) SAMSUNG DRIVER M: Ben Dooks M: Jaehoon Chung diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 4a35ebf..85bf266 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -797,3 +797,14 @@ config MMC_SDHCI_MICROCHIP_PIC32 If you have a controller with this interface, say Y or M here. If unsure, say N. +config MMC_SDHCI_BRCMSTB + tristate "Broadcom SDIO/SD/MMC support" + depends on ARCH_BRCMSTB || BMIPS_GENERIC + depends on MMC_SDHCI_PLTFM + default y + select MMC_SDHCI_IO_ACCESSORS + help + This selects support for the SDIO/SD/MMC Host Controller on + Broadcom STB SoCs. + + If unsure, say Y. diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index af918d2..2075c11 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -76,6 +76,7 @@ obj-$(CONFIG_MMC_SDHCI_IPROC) += sdhci-iproc.o obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32) += sdhci-pic32.o +obj-$(CONFIG_MMC_SDHCI_BRCMSTB) += sdhci-brcmstb.o ifeq ($(CONFIG_CB710_DEBUG),y) CFLAGS-cb710-mmc += -DDEBUG diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c new file mode 100644 index 0000000..0e6cca6 --- /dev/null +++ b/drivers/mmc/host/sdhci-brcmstb.c @@ -0,0 +1,154 @@ +/* + * sdhci-brcmstb.c Support for SDHCI on Broadcom BRCMSTB SoC's + * + * Copyright (C) 2015 Broadcom Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include +#include +#include +#include + +#include "sdhci-pltfm.h" + +static void brcmstb_of_parse(struct platform_device *pdev, + struct sdhci_host *host) +{ + struct device_node *np = pdev->dev.of_node; + + host->quirks |= SDHCI_QUIRK_MISSING_CAPS; + host->caps = sdhci_readl(host, SDHCI_CAPABILITIES); + host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1); + if (of_get_property(np, "broken-sdr50", NULL)) + host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50); + if (of_find_property(np, "broken-ddr50", NULL)) + host->caps1 &= ~SDHCI_SUPPORT_DDR50; + if (of_get_property(np, "broken-64-bit-dma", NULL)) + host->caps &= ~SDHCI_CAN_64BIT; + if (of_get_property(np, "broken-timeout-value", NULL)) + host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL; +} + + +#ifdef CONFIG_PM_SLEEP + +static int sdhci_brcmstb_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + int res; + + res = sdhci_suspend_host(host); + if (res) + return res; + clk_disable(pltfm_host->clk); + return res; +} + +static int sdhci_brcmstb_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + int err; + + err = clk_enable(pltfm_host->clk); + if (err) + return err; + return sdhci_resume_host(host); +} + +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(sdhci_brcmstb_pmops, sdhci_brcmstb_suspend, + sdhci_brcmstb_resume); + +static const struct sdhci_ops sdhci_brcmstb_ops = { + .set_clock = sdhci_set_clock, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_reset, + .set_uhs_signaling = sdhci_set_uhs_signaling, +}; + +static struct sdhci_pltfm_data sdhci_brcmstb_pdata = { + .ops = &sdhci_brcmstb_ops, +}; + +static int sdhci_brcmstb_probe(struct platform_device *pdev) +{ + struct device_node *dn = pdev->dev.of_node; + struct sdhci_host *host; + struct sdhci_pltfm_host *pltfm_host; + struct clk *clk; + int res; + + clk = of_clk_get_by_name(dn, "sw_sdio"); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "Clock not found in Device Tree\n"); + clk = NULL; + } + res = clk_prepare_enable(clk); + if (res) + goto undo_clk_get; + + host = sdhci_pltfm_init(pdev, &sdhci_brcmstb_pdata, 0); + if (IS_ERR(host)) { + res = PTR_ERR(host); + goto undo_clk_prep; + } + + /* Enable MMC_CAP2_HC_ERASE_SZ for better max discard calculations */ + host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ; + + sdhci_get_of_property(pdev); + mmc_of_parse(host->mmc); + brcmstb_of_parse(pdev, host); + + res = sdhci_add_host(host); + if (res) + goto undo_pltfm_init; + + pltfm_host = sdhci_priv(host); + pltfm_host->clk = clk; + return res; + +undo_pltfm_init: + sdhci_pltfm_free(pdev); +undo_clk_prep: + clk_disable_unprepare(clk); +undo_clk_get: + clk_put(clk); + return res; +} + +static const struct of_device_id sdhci_brcm_of_match[] = { + { .compatible = "brcm,sdhci-brcmstb" }, + {}, +}; +MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match); + +static struct platform_driver sdhci_brcmstb_driver = { + .driver = { + .name = "sdhci-brcmstb", + .owner = THIS_MODULE, + .pm = &sdhci_brcmstb_pmops, + .of_match_table = of_match_ptr(sdhci_brcm_of_match), + }, + .probe = sdhci_brcmstb_probe, + .remove = sdhci_pltfm_unregister, +}; + +module_platform_driver(sdhci_brcmstb_driver); + +MODULE_DESCRIPTION("SDHCI driver for Broadcom BRCMSTB SoCs"); +MODULE_AUTHOR("Broadcom"); +MODULE_LICENSE("GPL v2");