From patchwork Thu Dec 14 05:49:44 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinod Koul X-Patchwork-Id: 10111513 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9F697602B3 for ; Thu, 14 Dec 2017 05:49:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8DE20298E1 for ; Thu, 14 Dec 2017 05:49:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8175029952; Thu, 14 Dec 2017 05:49:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9183D298E1 for ; Thu, 14 Dec 2017 05:49:42 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id B9F00267A10; Thu, 14 Dec 2017 06:47:13 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 907B1267A54; Thu, 14 Dec 2017 06:47:12 +0100 (CET) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by alsa0.perex.cz (Postfix) with ESMTP id C094D267A37 for ; Thu, 14 Dec 2017 06:46:47 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Dec 2017 21:46:47 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,399,1508828400"; d="scan'208";a="12425485" Received: from vkoul-udesk7.iind.intel.com ([10.223.84.143]) by fmsmga004.fm.intel.com with ESMTP; 13 Dec 2017 21:46:44 -0800 From: Vinod Koul To: Takashi Date: Thu, 14 Dec 2017 11:19:44 +0530 Message-Id: <1513230585-13882-14-git-send-email-vinod.koul@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513230585-13882-1-git-send-email-vinod.koul@intel.com> References: <1513230585-13882-1-git-send-email-vinod.koul@intel.com> Cc: ALSA , Charles Keepax , Sudheer Papothi , patches.audio@intel.com, Greg Kroah-Hartman , plai@codeaurora.org, LKML , Pierre , Mark , srinivas.kandagatla@linaro.org, Sagar Dharia , alan@linux.intel.com Subject: [alsa-devel] [PATCH v6 13/14] soundwire: intel: Add Intel init module X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP The SoundWire Master is implemented as part of Audio controller in Intel platforms. Add a init module which creates SoundWire Master platform devices based on the links supported in the hardware. Signed-off-by: Sanyog Kale Reviewed-by: Philippe Ombredanne Acked-By: Pierre-Louis Bossart Reviewed-by: Takashi Iwai Signed-off-by: Vinod Koul --- drivers/soundwire/Makefile | 3 + drivers/soundwire/intel_init.c | 198 ++++++++++++++++++++++++++++++++++++ include/linux/soundwire/sdw_intel.h | 3 + 3 files changed, 204 insertions(+) create mode 100644 drivers/soundwire/intel_init.c diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile index befd7f8af7e1..e1a74c5692aa 100644 --- a/drivers/soundwire/Makefile +++ b/drivers/soundwire/Makefile @@ -13,3 +13,6 @@ obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o #Intel driver soundwire-intel-objs := intel.o obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o + +soundwire-intel-init-objs := intel_init.o +obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel-init.o diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c new file mode 100644 index 000000000000..6f2bb99526f2 --- /dev/null +++ b/drivers/soundwire/intel_init.c @@ -0,0 +1,198 @@ +// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) +// Copyright(c) 2015-17 Intel Corporation. + +/* + * SDW Intel Init Routines + * + * Initializes and creates SDW devices based on ACPI and Hardware values + */ + +#include +#include +#include +#include "intel.h" + +#define SDW_MAX_LINKS 4 +#define SDW_SHIM_LCAP 0x0 +#define SDW_SHIM_BASE 0x2C000 +#define SDW_ALH_BASE 0x2C800 +#define SDW_LINK_BASE 0x30000 +#define SDW_LINK_SIZE 0x10000 + +struct sdw_link_data { + struct sdw_intel_link_res res; + struct platform_device *pdev; +}; + +struct sdw_intel_ctx { + int count; + struct sdw_link_data *links; +}; + +static int sdw_intel_cleanup_pdev(struct sdw_intel_ctx *ctx) +{ + struct sdw_link_data *link = ctx->links; + int i; + + if (!link) + return 0; + + for (i = 0; i < ctx->count; i++) { + if (link->pdev) + platform_device_unregister(link->pdev); + link++; + } + + kfree(ctx->links); + ctx->links = NULL; + + return 0; +} + +static struct sdw_intel_ctx +*sdw_intel_add_controller(struct sdw_intel_res *res) +{ + struct platform_device_info pdevinfo; + struct platform_device *pdev; + struct sdw_link_data *link; + struct sdw_intel_ctx *ctx; + struct acpi_device *adev; + int ret, i; + u8 count; + u32 caps; + + if (acpi_bus_get_device(res->handle, &adev)) + return NULL; + + /* Found controller, find links supported */ + count = 0; + ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev), + "mipi-sdw-master-count", &count, 1); + + /* Don't fail on error, continue and use hw value */ + if (ret) { + dev_err(&adev->dev, + "Failed to read mipi-sdw-master-count: %d\n", ret); + count = SDW_MAX_LINKS; + } + + /* Check SNDWLCAP.LCOUNT */ + caps = ioread32(res->mmio_base + SDW_SHIM_BASE + SDW_SHIM_LCAP); + + /* Check HW supported vs property value and use min of two */ + count = min_t(u8, caps, count); + + /* Check count is within bounds */ + if (count > SDW_MAX_LINKS) { + dev_err(&adev->dev, "Link count %d exceeds max %d\n", + count, SDW_MAX_LINKS); + return NULL; + } + + dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count); + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + ctx->count = count; + ctx->links = kcalloc(ctx->count, sizeof(*ctx->links), GFP_KERNEL); + if (!ctx->links) + goto link_err; + + link = ctx->links; + + /* Create SDW Master devices */ + for (i = 0; i < count; i++) { + + link->res.irq = res->irq; + link->res.registers = res->mmio_base + SDW_LINK_BASE + + (SDW_LINK_SIZE * i); + link->res.shim = res->mmio_base + SDW_SHIM_BASE; + link->res.alh = res->mmio_base + SDW_ALH_BASE; + + memset(&pdevinfo, 0, sizeof(pdevinfo)); + + pdevinfo.parent = res->parent; + pdevinfo.name = "int-sdw"; + pdevinfo.id = i; + pdevinfo.fwnode = acpi_fwnode_handle(adev); + pdevinfo.data = &link->res; + pdevinfo.size_data = sizeof(link->res); + + pdev = platform_device_register_full(&pdevinfo); + if (IS_ERR(pdev)) { + dev_err(&adev->dev, + "platform device creation failed: %ld\n", + PTR_ERR(pdev)); + goto pdev_err; + } + + link->pdev = pdev; + link++; + } + + return ctx; + +pdev_err: + sdw_intel_cleanup_pdev(ctx); +link_err: + kfree(ctx); + return NULL; +} + +static acpi_status sdw_intel_acpi_cb(acpi_handle handle, u32 level, + void *cdata, void **return_value) +{ + struct sdw_intel_res *res = cdata; + struct acpi_device *adev; + + if (acpi_bus_get_device(handle, &adev)) { + dev_err(&adev->dev, "Couldn't find ACPI handle\n"); + return AE_NOT_FOUND; + } + + res->handle = handle; + return AE_OK; +} + +/** + * sdw_intel_init() - SoundWire Intel init routine + * @parent_handle: ACPI parent handle + * @res: resource data + * + * This scans the namespace and creates SoundWire link controller devices + * based on the info queried. + */ +void *sdw_intel_init(acpi_handle *parent_handle, struct sdw_intel_res *res) +{ + acpi_status status; + + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, + parent_handle, 1, + sdw_intel_acpi_cb, + NULL, res, NULL); + if (ACPI_FAILURE(status)) + return NULL; + + return sdw_intel_add_controller(res); +} +EXPORT_SYMBOL(sdw_intel_init); + +/** + * sdw_intel_exit() - SoundWire Intel exit + * @arg: callback context + * + * Delete the controller instances created and cleanup + */ +void sdw_intel_exit(void *arg) +{ + struct sdw_intel_ctx *ctx = arg; + + sdw_intel_cleanup_pdev(ctx); + kfree(ctx); +} +EXPORT_SYMBOL(sdw_intel_exit); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("Intel Soundwire Init Library"); diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h index 370cc52d8d1e..4b37528f592d 100644 --- a/include/linux/soundwire/sdw_intel.h +++ b/include/linux/soundwire/sdw_intel.h @@ -18,4 +18,7 @@ struct sdw_intel_res { struct device *parent; }; +void *sdw_intel_init(acpi_handle *parent_handle, struct sdw_intel_res *res); +void sdw_intel_exit(void *arg); + #endif