From patchwork Mon May 18 17:16:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vijendar Mukunda X-Patchwork-Id: 192667 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, UNWANTED_LANGUAGE_BODY, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 006EAC433DF for ; Mon, 18 May 2020 17:22:15 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7FCC42070A for ; Mon, 18 May 2020 17:22:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="dj+yX6a9"; dkim=pass (1024-bit key) header.d=amdcloud.onmicrosoft.com header.i=@amdcloud.onmicrosoft.com header.b="LSpNUwqk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7FCC42070A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amd.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id B9E471744; Mon, 18 May 2020 19:21:22 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz B9E471744 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1589822532; bh=jLwFtK/csV9DfuGb6qmfOcHdTFsqFVN2sqpyBYzKErY=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=dj+yX6a9UjOu0VV2mCOVjl3EfELD0wTJEMVXrmK+p8XhvW7bXIG5rRW2u3v1qDDaH /yEjKOcjCMpJgdSL2nFhcizV6QP2x6S/hqm+FLAb9yD8USfTh51M7mn+NLwlgb3gkZ BSbKYsmti1aNpfJhl6jM2CXUvXMcnEv2pYh/5S+0= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 0814CF802DF; Mon, 18 May 2020 19:17:42 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id B9FC0F80213; Mon, 18 May 2020 19:17:33 +0200 (CEST) Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2060.outbound.protection.outlook.com [40.107.223.60]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 29AB1F80213 for ; Mon, 18 May 2020 19:17:23 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 29AB1F80213 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=amdcloud.onmicrosoft.com header.i=@amdcloud.onmicrosoft.com header.b="LSpNUwqk" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=CHTYswTgtCPGSdxpnfDM0xmNfuYQ957bSEXP23DXSLP1ZQyVHRGkacPNNZ+vzrFrcheXb3W6G9RoXCVALcCB5vHgkjGxrjS9WweXtD8YO2AbIbpbNYOLx2/SPETHLzDT/p7pXwOoOfkSfdX2GUOab8AOzUZm+yOai+ZDX5YZmKVguZqIe/URgQ7ofgp1sFzGEvvXMgE8JELK2OW6YG9wTdnAyl+Ygr547zK0EuyYaMzknl5SmfGz20Zd6iViDrv7DEQAvpiIorqzHMGjF8IqW6qAR9zErvs0BfEQMaEUR0EiG53KDPTjmpJw0cewFmarNZopvTT0B4eiHp9nF5hYlA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=o2IFhCrOv7HBYq0YMXJA07ZCZEGuMW53IP0NhL17iDI=; b=NMk9OF9+gV87LoYJNitw2LC8J8CAyamSPZcPOEB8Ggnh7fI65WKUmk/ZZ/O+YZaqzg+EI9o/VRgcAuc9Sl39a+PpWR1o0by6V20aae4XsmRngI9qLm1f8+1QhrYWZoKGZUWRpbkVrJGaAKPItmHkx6Y87cjPsj68JID3TBrIQNrhqJTOht2mivRQS0FRAcm3QT2lS57vNFT7S6MdTYaWWkkxvXnI/YEeaOGTkwkYuC6rhyg4gU0iBRIiFj3PtAJgX/jHr2WjcQfWUTarQn6yVKPIKxVyGUhPqhYlfliBBYcQuMg6VyZDvbcfPhAxALX2P3dAxM6nXVSl4YoFzmHT1A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none (sender ip is 165.204.84.17) smtp.rcpttodomain=alsa-project.org smtp.mailfrom=amd.com; dmarc=permerror action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amdcloud.onmicrosoft.com; s=selector2-amdcloud-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=o2IFhCrOv7HBYq0YMXJA07ZCZEGuMW53IP0NhL17iDI=; b=LSpNUwqkH9CLhvXtoS/F/yjqLTC5bQK4i6YrHtBadfFpOAZ2iV8I/hFvcO4WvpyfIPR+D3lYEnIkJmTi+glpYztc2VDm5fGOeTFpfo1ak9Y4wl90pUEPWCTaZU1qVDrGhzZyL1NZWmgiowfR11x8lzN9Z6vtSaQ1IaD2HKE2H18= Received: from CO2PR06CA0059.namprd06.prod.outlook.com (2603:10b6:104:3::17) by DM5PR12MB1515.namprd12.prod.outlook.com (2603:10b6:4:6::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3000.20; Mon, 18 May 2020 17:17:21 +0000 Received: from CO1NAM11FT005.eop-nam11.prod.protection.outlook.com (2603:10b6:104:3:cafe::ee) by CO2PR06CA0059.outlook.office365.com (2603:10b6:104:3::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3000.20 via Frontend Transport; Mon, 18 May 2020 17:17:21 +0000 X-MS-Exchange-Authentication-Results: spf=none (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; alsa-project.org; dkim=none (message not signed) header.d=none;alsa-project.org; dmarc=permerror action=none header.from=amd.com; Received-SPF: None (protection.outlook.com: amd.com does not designate permitted sender hosts) Received: from SATLEXMB02.amd.com (165.204.84.17) by CO1NAM11FT005.mail.protection.outlook.com (10.13.174.147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.3000.19 via Frontend Transport; Mon, 18 May 2020 17:17:20 +0000 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB02.amd.com (10.181.40.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Mon, 18 May 2020 12:17:20 -0500 Received: from SATLEXMB02.amd.com (10.181.40.143) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Mon, 18 May 2020 12:17:20 -0500 Received: from atgasia02.amd.com (10.180.168.240) by SATLEXMB02.amd.com (10.181.40.143) with Microsoft SMTP Server id 15.1.1713.5 via Frontend Transport; Mon, 18 May 2020 12:17:18 -0500 From: Vijendar Mukunda To: , , Subject: [PATCH v3 07/14] ASoC: amd: add acp3x pdm driver dma ops Date: Tue, 19 May 2020 01:16:57 +0800 Message-ID: <20200518171704.24999-8-Vijendar.Mukunda@amd.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200518171704.24999-1-Vijendar.Mukunda@amd.com> References: <20200518171704.24999-1-Vijendar.Mukunda@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SATLEXMB02.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFTY:; SFS:(4636009)(346002)(39860400002)(136003)(396003)(376002)(46966005)(4326008)(8936002)(336012)(426003)(316002)(7696005)(82310400002)(2906002)(356005)(186003)(1076003)(36756003)(81166007)(82740400003)(5660300002)(70586007)(70206006)(110136005)(47076004)(478600001)(86362001)(26005)(6666004)(54906003)(2616005)(8676002)(42413003)(32563001); DIR:OUT; SFP:1101; X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: e83d37e6-3ddd-4424-30b1-08d7fb4f5316 X-MS-TrafficTypeDiagnostic: DM5PR12MB1515: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; X-Forefront-PRVS: 04073E895A X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 May 2020 17:17:20.9456 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e83d37e6-3ddd-4424-30b1-08d7fb4f5316 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB02.amd.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB1515 Cc: Alexander.Deucher@amd.com, Vijendar Mukunda X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 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: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" This patch adds PDM driver DMA operations. Signed-off-by: Vijendar Mukunda --- sound/soc/amd/renoir/acp3x-pdm-dma.c | 195 +++++++++++++++++++++++++++ sound/soc/amd/renoir/rn_acp3x.h | 29 ++++ 2 files changed, 224 insertions(+) diff --git a/sound/soc/amd/renoir/acp3x-pdm-dma.c b/sound/soc/amd/renoir/acp3x-pdm-dma.c index fdac2c1e3acd..8bb03fa5b4a5 100644 --- a/sound/soc/amd/renoir/acp3x-pdm-dma.c +++ b/sound/soc/amd/renoir/acp3x-pdm-dma.c @@ -16,6 +16,25 @@ #define DRV_NAME "acp_rn_pdm_dma" +static const struct snd_pcm_hardware acp_pdm_hardware_capture = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, + .formats = SNDRV_PCM_FMTBIT_S32_LE, + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_48000, + .rate_min = 48000, + .rate_max = 48000, + .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, + .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, + .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, + .periods_min = CAPTURE_MIN_NUM_PERIODS, + .periods_max = CAPTURE_MAX_NUM_PERIODS, +}; + static irqreturn_t pdm_irq_handler(int irq, void *dev_id) { struct pdm_dev_data *rn_pdm_data; @@ -41,6 +60,176 @@ static irqreturn_t pdm_irq_handler(int irq, void *dev_id) return IRQ_NONE; } +static void init_pdm_ring_buffer(u32 physical_addr, + u32 buffer_size, + u32 watermark_size, + void __iomem *acp_base) +{ + rn_writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR); + rn_writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE); + rn_writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE); + rn_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL); +} + +static void enable_pdm_interrupts(void __iomem *acp_base) +{ + u32 ext_int_ctrl; + + ext_int_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); + ext_int_ctrl |= PDM_DMA_INTR_MASK; + rn_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); +} + +static void disable_pdm_interrupts(void __iomem *acp_base) +{ + u32 ext_int_ctrl; + + ext_int_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); + ext_int_ctrl |= ~PDM_DMA_INTR_MASK; + rn_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); +} + +static void config_acp_dma(struct pdm_stream_instance *rtd, int direction) +{ + u16 page_idx; + u32 low, high, val; + dma_addr_t addr; + + addr = rtd->dma_addr; + val = 0; + + /* Group Enable */ + rn_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp_base + + ACPAXI2AXI_ATU_BASE_ADDR_GRP_1); + rn_writel(PAGE_SIZE_4K_ENABLE, rtd->acp_base + + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1); + + for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) { + /* Load the low address of page int ACP SRAM through SRBM */ + low = lower_32_bits(addr); + high = upper_32_bits(addr); + + rn_writel(low, rtd->acp_base + ACP_SCRATCH_REG_0 + val); + high |= BIT(31); + rn_writel(high, rtd->acp_base + ACP_SCRATCH_REG_0 + val + 4); + val += 8; + addr += PAGE_SIZE; + } +} + +static int acp_pdm_dma_open(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime; + struct pdm_dev_data *adata; + struct pdm_stream_instance *pdm_data; + int ret; + + runtime = substream->runtime; + adata = dev_get_drvdata(component->dev); + pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL); + if (!pdm_data) + return -EINVAL; + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + runtime->hw = acp_pdm_hardware_capture; + + ret = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) { + dev_err(component->dev, "set integer constraint failed\n"); + kfree(pdm_data); + return ret; + } + + enable_pdm_interrupts(adata->acp_base); + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + adata->capture_stream = substream; + + pdm_data->acp_base = adata->acp_base; + runtime->private_data = pdm_data; + return ret; +} + +static int acp_pdm_dma_hw_params(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct pdm_stream_instance *rtd; + size_t size, period_bytes; + + rtd = substream->runtime->private_data; + if (!rtd) + return -EINVAL; + size = params_buffer_bytes(params); + period_bytes = params_period_bytes(params); + rtd->dma_addr = substream->dma_buffer.addr; + rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); + config_acp_dma(rtd, substream->stream); + init_pdm_ring_buffer(MEM_WINDOW_START, size, period_bytes, + rtd->acp_base); + return 0; +} + +static u64 acp_pdm_get_byte_count(struct pdm_stream_instance *rtd, + int direction) +{ + union acp_pdm_dma_count byte_count; + + byte_count.bcount.high = + rn_readl(rtd->acp_base + + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH); + byte_count.bcount.low = + rn_readl(rtd->acp_base + + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW); + return byte_count.bytescount; +} + +static snd_pcm_uframes_t acp_pdm_dma_pointer(struct snd_soc_component *comp, + struct snd_pcm_substream *stream) +{ + struct pdm_stream_instance *rtd; + u32 pos, buffersize; + u64 bytescount; + + rtd = stream->runtime->private_data; + buffersize = frames_to_bytes(stream->runtime, + stream->runtime->buffer_size); + bytescount = acp_pdm_get_byte_count(rtd, stream->stream); + if (bytescount > rtd->bytescount) + bytescount -= rtd->bytescount; + pos = do_div(bytescount, buffersize); + return bytes_to_frames(stream->runtime, pos); +} + +static int acp_pdm_dma_new(struct snd_soc_component *component, + struct snd_soc_pcm_runtime *rtd) +{ + struct device *parent = component->dev->parent; + + snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, + parent, MIN_BUFFER, MAX_BUFFER); + return 0; +} + +static int acp_pdm_dma_mmap(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct vm_area_struct *vma) +{ + return snd_pcm_lib_default_mmap(substream, vma); +} + +static int acp_pdm_dma_close(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct pdm_dev_data *adata = dev_get_drvdata(component->dev); + + disable_pdm_interrupts(adata->acp_base); + adata->capture_stream = NULL; + return 0; +} + static struct snd_soc_dai_driver acp_pdm_dai_driver = { .capture = { .rates = SNDRV_PCM_RATE_48000, @@ -55,6 +244,12 @@ static struct snd_soc_dai_driver acp_pdm_dai_driver = { static const struct snd_soc_component_driver acp_pdm_component = { .name = DRV_NAME, + .open = acp_pdm_dma_open, + .close = acp_pdm_dma_close, + .hw_params = acp_pdm_dma_hw_params, + .pointer = acp_pdm_dma_pointer, + .mmap = acp_pdm_dma_mmap, + .pcm_construct = acp_pdm_dma_new, }; static int acp_pdm_audio_probe(struct platform_device *pdev) diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h index 1ad8a7845fda..3536d24374f3 100644 --- a/sound/soc/amd/renoir/rn_acp3x.h +++ b/sound/soc/amd/renoir/rn_acp3x.h @@ -29,13 +29,42 @@ #define ACP_ERROR_MASK 0x20000000 #define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF #define PDM_DMA_STAT 0x10 +#define PDM_DMA_INTR_MASK 0x10000 +#define ACP_ERROR_STAT 29 +#define ACP_SRAM_PTE_OFFSET 0x02050000 +#define PAGE_SIZE_4K_ENABLE 0x2 +#define MEM_WINDOW_START 0x4000000 + +#define CAPTURE_MIN_NUM_PERIODS 4 +#define CAPTURE_MAX_NUM_PERIODS 4 +#define CAPTURE_MAX_PERIOD_SIZE 8192 +#define CAPTURE_MIN_PERIOD_SIZE 4096 + +#define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS) +#define MIN_BUFFER MAX_BUFFER struct pdm_dev_data { u32 pdm_irq; void __iomem *acp_base; struct snd_pcm_substream *capture_stream; }; +struct pdm_stream_instance { + u16 num_pages; + u16 channels; + dma_addr_t dma_addr; + u64 bytescount; + void __iomem *acp_base; +}; + +union acp_pdm_dma_count { + struct { + u32 low; + u32 high; + } bcount; + u64 bytescount; +}; + static inline u32 rn_readl(void __iomem *base_addr) { return readl(base_addr - ACP_PHY_BASE_ADDRESS);