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Fri, 6 Mar 2020 11:14:21 +0000 From: Daniel Baluta To: pierre-louis.bossart@linux.intel.com, alsa-devel@alsa-project.org, kuninori.morimoto.gx@renesas.com, peter.ujfalusi@ti.com, broonie@kernel.org, linux-imx@nxp.com, robh+dt@kernel.org, devicetree@vger.kernel.org Subject: [PATCH v2 2/2] ASoC: fsl: Add generic CPU DAI driver Date: Fri, 6 Mar 2020 13:13:53 +0200 Message-Id: <20200306111353.12906-3-daniel.baluta@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200306111353.12906-1-daniel.baluta@oss.nxp.com> References: <20200306111353.12906-1-daniel.baluta@oss.nxp.com> X-ClientProxiedBy: AM0PR02CA0039.eurprd02.prod.outlook.com (2603:10a6:208:d2::16) To VI1PR0402MB3839.eurprd04.prod.outlook.com (2603:10a6:803:21::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from fsr-ub1864-103.ro-buh02.nxp.com (89.37.124.34) by AM0PR02CA0039.eurprd02.prod.outlook.com (2603:10a6:208:d2::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2793.15 via Frontend Transport; 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A:0; MX:1; Received-SPF: None (protection.outlook.com: oss.nxp.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: rstWD/zIyOp80rTVG7Io30uUD3zrFVW0VnM83FTpllJf8zUstAqvkDPBm77dmxbex5Wbc4UtCu7bYdoWD4BDR17ZbkSiRDB8c+Rm2grnWUXPT623D/VCpObi2djDectDLWLxUHOLceqKvssxjj9xmw== X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 94be3b16-6776-4641-7c30-08d7c1bf84cb X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Mar 2020 11:14:21.0365 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: U+XGvLy5DJhgJcp2lkMH9zizhZuIvNsOYGdZdvnEiv+lzyPtH2V5+NeSg2O95cT/JLcMTyQjP/h+b6fgPIqiHw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0402MB2830 Cc: Xiubo.Lee@gmail.com, linux-kernel@vger.kernel.org, shengjiu.wang@nxp.com, tiwai@suse.com, ranjani.sridharan@linux.intel.com, liam.r.girdwood@linux.intel.com, Daniel Baluta , sound-open-firmware@alsa-project.org 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" From: Daniel Baluta On i.MX8 platforms that have a DSP the DAI handling is taken care of by two entities: * Application Processor (AP), which runs Linux * DSP, which runs a firmware (typically Sound Open Firmware) The DSP has access to DAI IP registers, but it cannot easily handle resources like: * clocks * power domain management * pinctrl For this reason we introduce a generic FSL DAI driver which will take care of the resources above. Signed-off-by: Daniel Baluta --- sound/soc/fsl/Kconfig | 8 ++ sound/soc/fsl/Makefile | 2 + sound/soc/fsl/fsl_dai.c | 288 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 298 insertions(+) create mode 100644 sound/soc/fsl/fsl_dai.c diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig index 65e8cd4be930..bea8ab2c24f9 100644 --- a/sound/soc/fsl/Kconfig +++ b/sound/soc/fsl/Kconfig @@ -75,6 +75,14 @@ config SND_SOC_FSL_ESAI This option is only useful for out-of-tree drivers since in-tree drivers select it automatically. +config SND_SOC_FSL_DAI + tristate "Generic FSL DAI support for Sound Open Firmware" + help + Say Y if you want to enable generic FSL DAI support to be used + with Sound Open Firmware. This module takes care of enabling + clocks, power domain, pinctrl for FSL DAIs. The rest of DAI + control is taken care of by SOF firmware. + config SND_SOC_FSL_MICFIL tristate "Pulse Density Modulation Microphone Interface (MICFIL) module support" select REGMAP_MMIO diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile index 8cde88c72d93..e4ed253b6657 100644 --- a/sound/soc/fsl/Makefile +++ b/sound/soc/fsl/Makefile @@ -20,6 +20,7 @@ snd-soc-fsl-ssi-y := fsl_ssi.o snd-soc-fsl-ssi-$(CONFIG_DEBUG_FS) += fsl_ssi_dbg.o snd-soc-fsl-spdif-objs := fsl_spdif.o snd-soc-fsl-esai-objs := fsl_esai.o +snd-soc-fsl-dai-objs := fsl_dai.o snd-soc-fsl-micfil-objs := fsl_micfil.o snd-soc-fsl-utils-objs := fsl_utils.o snd-soc-fsl-dma-objs := fsl_dma.o @@ -32,6 +33,7 @@ obj-$(CONFIG_SND_SOC_FSL_SAI) += snd-soc-fsl-sai.o obj-$(CONFIG_SND_SOC_FSL_SSI) += snd-soc-fsl-ssi.o obj-$(CONFIG_SND_SOC_FSL_SPDIF) += snd-soc-fsl-spdif.o obj-$(CONFIG_SND_SOC_FSL_ESAI) += snd-soc-fsl-esai.o +obj-$(CONFIG_SND_SOC_FSL_DAI) += snd-soc-fsl-dai.o obj-$(CONFIG_SND_SOC_FSL_MICFIL) += snd-soc-fsl-micfil.o obj-$(CONFIG_SND_SOC_FSL_UTILS) += snd-soc-fsl-utils.o obj-$(CONFIG_SND_SOC_FSL_MQS) += snd-soc-fsl-mqs.o diff --git a/sound/soc/fsl/fsl_dai.c b/sound/soc/fsl/fsl_dai.c new file mode 100644 index 000000000000..804e04f87841 --- /dev/null +++ b/sound/soc/fsl/fsl_dai.c @@ -0,0 +1,288 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Freescale Generic DAI driver for DSP +// +// Copyright 2019 NXP +// Author: Daniel Baluta + +#include +#include +#include +#include +#include +#include + +enum fsl_dai_type { + FSL_DAI_TYPE_NONE, + FSL_DAI_TYPE_SAI, + FSL_DAI_TYPE_ESAI, +}; + +#define FSL_DAI_ESAI_CLK_NUM 4 +static const char *esai_clks[FSL_DAI_ESAI_CLK_NUM] = { + "core", + "extal", + "fsys", + "spba", +}; + +#define FSL_DAI_SAI_CLK_NUM 5 +static const char *sai_clks[FSL_DAI_SAI_CLK_NUM] = { + "bus", + "mclk0", + "mclk1", + "mclk2", + "mclk3", +}; + +struct fsl_dai { + struct platform_device *pdev; + + /* DAI clocks */ + struct clk **clks; + const char **clk_names; + int num_clks; + + /* Power Domain handling */ + int num_domains; + struct device **pd_dev; + struct device_link **link; + + /* DAIS */ + struct snd_soc_dai_driver *dai_drv; + int num_drv; +}; + +static struct snd_soc_dai_driver fsl_dai = { +}; + +static const struct snd_soc_component_driver fsl_dai_component = { + .name = "fsl-dai", +}; + +static int fsl_dai_init_clocks(struct fsl_dai *dai_priv) +{ + struct device *dev = &dai_priv->pdev->dev; + int i; + + dai_priv->clks = devm_kcalloc(dev, dai_priv->num_clks, + sizeof(*dai_priv->clks), GFP_KERNEL); + if (!dai_priv->clks) + return -ENOMEM; + + for (i = 0; i < dai_priv->num_clks; i++) { + dai_priv->clks[i] = devm_clk_get(dev, dai_priv->clk_names[i]); + if (IS_ERR(dai_priv->clks[i])) { + dev_dbg(dev, "Failed to get clk %s\n", + dai_priv->clk_names[i]); + dai_priv->clks[i] = NULL; + } + } + + return 0; +} + +int fsl_get_dai_type(struct fsl_dai *dai_priv) +{ + struct device_node *np = dai_priv->pdev->dev.of_node; + + if (of_device_is_compatible(np, "fsl,esai-dai")) + return FSL_DAI_TYPE_ESAI; + + if (of_device_is_compatible(np, "fsl,sai-dai")) + return FSL_DAI_TYPE_SAI; + + return FSL_DAI_TYPE_NONE; +} + +static int fsl_dai_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct fsl_dai *priv; + char *dai_name; + int dai_type, dai_index; + int ret; + int i; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->pdev = pdev; + + dev_set_drvdata(&pdev->dev, priv); + + ret = of_property_read_u32(np, "fsl,dai-index", &dai_index); + if (ret) { + dev_err(&pdev->dev, "dai-index missing or invalid\n"); + return ret; + } + + dai_type = fsl_get_dai_type(priv); + switch (dai_type) { + case FSL_DAI_TYPE_ESAI: + priv->clk_names = esai_clks; + priv->num_clks = FSL_DAI_ESAI_CLK_NUM; + priv->dai_drv = &fsl_dai; + priv->num_drv = 1; + dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "esai%d", + dai_index); + if (!dai_name) + return -ENOMEM; + break; + case FSL_DAI_TYPE_SAI: + priv->clk_names = sai_clks; + priv->num_clks = FSL_DAI_SAI_CLK_NUM; + priv->dai_drv = &fsl_dai; + priv->num_drv = 1; + dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "sai%d", + dai_index); + if (!dai_name) + return -ENOMEM; + break; + default: + dev_err(&pdev->dev, "Invalid DAI type %d\n", dai_type); + return -EINVAL; + } + + fsl_dai.name = dai_name; + + ret = fsl_dai_init_clocks(priv); + if (ret < 0) { + dev_err(&pdev->dev, "Error at init clocks\n"); + return ret; + } + + priv->num_domains = of_count_phandle_with_args(np, "power-domains", + "#power-domain-cells"); + if (priv->num_domains < 0) { + dev_err(&pdev->dev, "no power-domains property in %pOF\n", np); + return priv->num_domains; + } + + priv->pd_dev = devm_kmalloc_array(&pdev->dev, priv->num_domains, + sizeof(*priv->pd_dev), GFP_KERNEL); + if (!priv->pd_dev) + return -ENOMEM; + + priv->link = devm_kmalloc_array(&pdev->dev, priv->num_domains, + sizeof(*priv->link), GFP_KERNEL); + if (!priv->link) + return -ENOMEM; + + for (i = 0; i < priv->num_domains; i++) { + priv->pd_dev[i] = dev_pm_domain_attach_by_id(&pdev->dev, i); + if (IS_ERR(priv->pd_dev[i])) { + ret = PTR_ERR(priv->pd_dev[i]); + goto unroll_pm; + } + + priv->link[i] = device_link_add(&pdev->dev, priv->pd_dev[i], + DL_FLAG_STATELESS | + DL_FLAG_PM_RUNTIME | + DL_FLAG_RPM_ACTIVE); + if (!priv->link[i]) { + ret = -EINVAL; + dev_pm_domain_detach(priv->pd_dev[i], false); + goto unroll_pm; + } + } + + pm_runtime_enable(&pdev->dev); + + ret = devm_snd_soc_register_component(&pdev->dev, &fsl_dai_component, + &fsl_dai, 1); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to register DAI ret = %d\n", ret); + return ret; + } + return 0; + +unroll_pm: + while (--i >= 0) { + device_link_del(priv->link[i]); + dev_pm_domain_detach(priv->pd_dev[i], false); + } + return ret; +} + +static int fsl_dai_remove(struct platform_device *pdev) +{ + struct fsl_dai *priv = platform_get_drvdata(pdev); + int i; + + pm_runtime_disable(&priv->pdev->dev); + + for (i = 0; i < priv->num_domains; i++) { + device_link_del(priv->link[i]); + dev_pm_domain_detach(priv->pd_dev[i], false); + } + + return 0; +} + +static const struct of_device_id fsl_dai_dt_ids[] = { + { .compatible = "fsl,esai-dai", }, + { .compatible = "fsl,sai-dai", }, + {} +}; +MODULE_DEVICE_TABLE(of, fsl_dai_dt_ids); + +#ifdef CONFIG_PM +static int fsl_dai_runtime_resume(struct device *dev) +{ + struct fsl_dai *priv = dev_get_drvdata(dev); + int i, ret; + + for (i = 0; i < priv->num_clks; i++) { + ret = clk_prepare_enable(priv->clks[i]); + if (ret < 0) { + dev_err(dev, "Failed to enable clk %s\n", + priv->clk_names[i]); + goto out; + } + } + return 0; +out: + while (--i >= 0) + clk_disable_unprepare(priv->clks[i]); + + return ret; +} + +static int fsl_dai_runtime_suspend(struct device *dev) +{ + struct fsl_dai *priv = dev_get_drvdata(dev); + int i; + + for (i = 0; i < priv->num_clks; i++) + clk_disable_unprepare(priv->clks[i]); + + return 0; +} +#endif /* CONFIG_PM */ + +static const struct dev_pm_ops fsl_dai_pm_ops = { + SET_RUNTIME_PM_OPS(fsl_dai_runtime_suspend, + fsl_dai_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static struct platform_driver fsl_dai_driver = { + .probe = fsl_dai_probe, + .remove = fsl_dai_remove, + .driver = { + .name = "fsl-dai", + .pm = &fsl_dai_pm_ops, + .of_match_table = fsl_dai_dt_ids, + }, +}; + +module_platform_driver(fsl_dai_driver); + +MODULE_ALIAS("platform:fsl-dai"); + +MODULE_AUTHOR("Daniel Baluta "); +MODULE_DESCRIPTION("FSL Generic DAI driver for DSP"); +MODULE_LICENSE("GPL v2");