From patchwork Tue Sep 20 13:26:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Pali_Roh=C3=A1r?= X-Patchwork-Id: 12982175 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9E1A3C54EE9 for ; Tue, 20 Sep 2022 13:29:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/88/AeKLfsIHt2NFQRTdCRR43iWuFVU/bAg+i2wB23o=; b=i6ocy7qPdG4+qA rvEJsabXGVJnhYP39vcgH2KXrksABtSZgbIunMeyBwcQVUaB8sG6uJETKZ0xY3g+yORdaMlwxqagI ti4OZhH2rU+zGz+p6e4nWmMGWHg5M/cWtdRCDcWDulo6CUVOPJRb0qh9fX+di0Z7Z7Rdn77tZhvLw fQOE8JwrYejRYQznNZ+aKA5ZopI+69WBiBuBsY9dRpFXwOW7nypPwwXhL1Y6RLEphQUXp8sYbDAtW foEHgOMGbiDcX5HJaoSeVZz3kYCFhNKDqm2ozHYga1UMhV2kBKAFkfMU/5oIOCPvkWBf6gyulvVzD 6dQb50S9qLONGP1p06Yg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oadI5-0044kj-99; Tue, 20 Sep 2022 13:27:57 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oadHg-0044c0-JZ for linux-arm-kernel@lists.infradead.org; Tue, 20 Sep 2022 13:27:35 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C1B11620D1; Tue, 20 Sep 2022 13:27:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE75DC433D7; Tue, 20 Sep 2022 13:27:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663680451; bh=/dxfWhqmMkQmV7S5CRMZVDD51+9HbcPvMYerh1tpzBg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=STSFalZEwXGSEbc6nzmDWOmroSB9N7vampXEwj0HJR6GHPGblhrcNNSGuZL1lggO7 v+FPFbxoj6zVWhkCs2gQeKfD2+Q/xNK7SOrsQzi1q5igaHHZ6rSXtkg7C44XEK6wq3 jFfPgH8EufOtbDAaU/gU0osBDkYeqFMSvXv869DRAQOsGIzIYvxFIYFdGpx7OtB6ij bk50QXw6rV2MC0/HqyLr9aIyrQRJCaCoiTii94KZdE+fSEfUJMVPjIRVFEGIg+bJ2G sFveGHx3WWc5hbVZxENS+TuEV7wp+f6fBC7qkdhPLXE0DfSENDwMNMSfdtaNbo6anC pFwb9VxQYe0Mw== Received: by pali.im (Postfix) id 378762B6E; Tue, 20 Sep 2022 15:27:28 +0200 (CEST) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: Liam Girdwood , Mark Brown , Andrew Lunn , Gregory Clement , Sebastian Hesselbarth , Marcin Wojtas Cc: alsa-devel@alsa-project.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/5] ASoC: kirkwood: enable Kirkwood driver for Armada 38x platforms Date: Tue, 20 Sep 2022 15:26:44 +0200 Message-Id: <20220920132648.2008-2-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220920132648.2008-1-pali@kernel.org> References: <20220920132648.2008-1-pali@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220920_062732_770956_FECBC458 X-CRM114-Status: GOOD ( 30.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Marcin Wojtas The audio unit of Marvell Armada38x SoC is similar to the ones comprised by other Marvell SoCs (Kirkwood, Dove and Armada 370). Therefore KW audio driver can be used to support it and this commit adds new compatible string to identify Armada 38x variant. Two new memory regions are added: first one for PLL configuration and the second one for choosing one of audio I/O modes (I2S or S/PDIF). For the latter purpose a new optional DT property is added ('spdif-mode'). kirkwood-i2s driver is extended by adding a new init function for Armada 38x flavor and also a routine that enables PLL output (i.e. MCLK) configuration. Signed-off-by: Marcin Wojtas Tested-by: Star_Automation Reviewed-by: Nadav Haklai Reviewed-by: Lior Amsalem Tested-by: Lior Amsalem Signed-off-by: Hezi Shahmoon Reviewed-by: Neta Zur Hershkovits [pali: Fix support for pre-38x SoCs] Signed-off-by: Pali Rohár --- .../devicetree/bindings/sound/mvebu-audio.txt | 14 +- sound/soc/kirkwood/kirkwood-i2s.c | 136 +++++++++++++++++- sound/soc/kirkwood/kirkwood.h | 2 + 3 files changed, 149 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/sound/mvebu-audio.txt b/Documentation/devicetree/bindings/sound/mvebu-audio.txt index cb8c07c81ce4..4f5dec5cb3c2 100644 --- a/Documentation/devicetree/bindings/sound/mvebu-audio.txt +++ b/Documentation/devicetree/bindings/sound/mvebu-audio.txt @@ -6,9 +6,14 @@ Required properties: "marvell,kirkwood-audio" for Kirkwood platforms "marvell,dove-audio" for Dove platforms "marvell,armada370-audio" for Armada 370 platforms + "marvell,armada-380-audio" for Armada 38x platforms - reg: physical base address of the controller and length of memory mapped - region. + region (named "i2s_regs"). + With "marvell,armada-380-audio" two other regions are required: + first of those is dedicated for Audio PLL Configuration registers + (named "pll_regs") and the second one ("soc_ctrl") - for register + where one of exceptive I/O types (I2S or S/PDIF) is set. - interrupts: with "marvell,kirkwood-audio", the audio interrupt @@ -23,6 +28,13 @@ Required properties: "internal" for the internal clock "extclk" for the external clock +Optional properties: + +- spdif-mode: + Enable S/PDIF mode on Armada 38x SoC. Using this property + disables standard I2S I/O. Valid only with "marvell,armada-380-audio" + compatible string. + Example: i2s1: audio-controller@b4000 { diff --git a/sound/soc/kirkwood/kirkwood-i2s.c b/sound/soc/kirkwood/kirkwood-i2s.c index 2a4ffe945177..ac387b5ca094 100644 --- a/sound/soc/kirkwood/kirkwood-i2s.c +++ b/sound/soc/kirkwood/kirkwood-i2s.c @@ -31,6 +31,122 @@ (SNDRV_PCM_FMTBIT_S16_LE | \ SNDRV_PCM_FMTBIT_S24_LE) +/* These registers are relative to the second register region - + * audio pll configuration. + */ +#define A38X_PLL_CONF_REG0 0x0 +#define A38X_PLL_FB_CLK_DIV_OFFSET 10 +#define A38X_PLL_FB_CLK_DIV_MASK 0x7fc00 +#define A38X_PLL_CONF_REG1 0x4 +#define A38X_PLL_FREQ_OFFSET_MASK 0xffff +#define A38X_PLL_FREQ_OFFSET_VALID BIT(16) +#define A38X_PLL_SW_RESET BIT(31) +#define A38X_PLL_CONF_REG2 0x8 +#define A38X_PLL_AUDIO_POSTDIV_MASK 0x7f + +/* Bit below belongs to SoC control register corresponding to the third + * register region. + */ +#define A38X_SPDIF_MODE_ENABLE BIT(27) + +static int armada_38x_i2s_init_quirk(struct platform_device *pdev, + struct kirkwood_dma_data *priv, + struct snd_soc_dai_driver *dai_drv) +{ + struct device_node *np = pdev->dev.of_node; + u32 reg_val; + int i; + + priv->pll_config = devm_platform_ioremap_resource_byname(pdev, "pll_regs"); + if (IS_ERR(priv->pll_config)) + return -ENOMEM; + + priv->soc_control = devm_platform_ioremap_resource_byname(pdev, "soc_ctrl"); + if (IS_ERR(priv->soc_control)) + return -ENOMEM; + + /* Select one of exceptive modes: I2S or S/PDIF */ + reg_val = readl(priv->soc_control); + if (of_property_read_bool(np, "spdif-mode")) { + reg_val |= A38X_SPDIF_MODE_ENABLE; + dev_info(&pdev->dev, "using S/PDIF mode\n"); + } else { + reg_val &= ~A38X_SPDIF_MODE_ENABLE; + dev_info(&pdev->dev, "using I2S mode\n"); + } + writel(reg_val, priv->soc_control); + + /* Update available rates of mclk's fs */ + for (i = 0; i < 2; i++) { + dai_drv[i].playback.rates |= SNDRV_PCM_RATE_192000; + dai_drv[i].capture.rates |= SNDRV_PCM_RATE_192000; + } + + return 0; +} + +static inline void armada_38x_set_pll(void __iomem *base, unsigned long rate) +{ + u32 reg_val; + u16 freq_offset = 0x22b0; + u8 audio_postdiv, fb_clk_div = 0x1d; + + /* Set frequency offset value to not valid and enable PLL reset */ + reg_val = readl(base + A38X_PLL_CONF_REG1); + reg_val &= ~A38X_PLL_FREQ_OFFSET_VALID; + reg_val &= ~A38X_PLL_SW_RESET; + writel(reg_val, base + A38X_PLL_CONF_REG1); + + udelay(1); + + /* Update PLL parameters */ + switch (rate) { + default: + case 44100: + freq_offset = 0x735; + fb_clk_div = 0x1b; + audio_postdiv = 0xc; + break; + case 48000: + audio_postdiv = 0xc; + break; + case 96000: + audio_postdiv = 0x6; + break; + case 192000: + audio_postdiv = 0x3; + break; + } + + reg_val = readl(base + A38X_PLL_CONF_REG0); + reg_val &= ~A38X_PLL_FB_CLK_DIV_MASK; + reg_val |= (fb_clk_div << A38X_PLL_FB_CLK_DIV_OFFSET); + writel(reg_val, base + A38X_PLL_CONF_REG0); + + reg_val = readl(base + A38X_PLL_CONF_REG2); + reg_val &= ~A38X_PLL_AUDIO_POSTDIV_MASK; + reg_val |= audio_postdiv; + writel(reg_val, base + A38X_PLL_CONF_REG2); + + reg_val = readl(base + A38X_PLL_CONF_REG1); + reg_val &= ~A38X_PLL_FREQ_OFFSET_MASK; + reg_val |= freq_offset; + writel(reg_val, base + A38X_PLL_CONF_REG1); + + udelay(1); + + /* Disable reset */ + reg_val |= A38X_PLL_SW_RESET; + writel(reg_val, base + A38X_PLL_CONF_REG1); + + /* Wait 50us for PLL to lock */ + udelay(50); + + /* Restore frequency offset value validity */ + reg_val |= A38X_PLL_FREQ_OFFSET_VALID; + writel(reg_val, base + A38X_PLL_CONF_REG1); +} + static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { @@ -106,7 +222,10 @@ static void kirkwood_set_rate(struct snd_soc_dai *dai, * defined in kirkwood_i2s_dai */ dev_dbg(dai->dev, "%s: dco set rate = %lu\n", __func__, rate); - kirkwood_set_dco(priv->io, rate); + if (priv->pll_config) + armada_38x_set_pll(priv->pll_config, rate); + else + kirkwood_set_dco(priv->io, rate); clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO; } else { @@ -532,7 +651,10 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev) dev_set_drvdata(&pdev->dev, priv); - priv->io = devm_platform_ioremap_resource(pdev, 0); + if (of_device_is_compatible(np, "marvell,armada-380-audio")) + priv->io = devm_platform_ioremap_resource_byname(pdev, "i2s_regs"); + else + priv->io = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(priv->io)) return PTR_ERR(priv->io); @@ -540,6 +662,15 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev) if (priv->irq < 0) return priv->irq; + if (of_device_is_compatible(np, "marvell,armada-380-audio")) { + err = armada_38x_i2s_init_quirk(pdev, priv, soc_dai); + /* Set initial pll frequency */ + if (priv->pll_config) + armada_38x_set_pll(priv->pll_config, 44100); + if (err < 0) + return err; + } + if (np) { priv->burst = 128; /* might be 32 or 128 */ } else if (data) { @@ -623,6 +754,7 @@ static const struct of_device_id mvebu_audio_of_match[] = { { .compatible = "marvell,kirkwood-audio" }, { .compatible = "marvell,dove-audio" }, { .compatible = "marvell,armada370-audio" }, + { .compatible = "marvell,armada-380-audio" }, { } }; MODULE_DEVICE_TABLE(of, mvebu_audio_of_match); diff --git a/sound/soc/kirkwood/kirkwood.h b/sound/soc/kirkwood/kirkwood.h index a1733a6aace5..79bb9aa7f086 100644 --- a/sound/soc/kirkwood/kirkwood.h +++ b/sound/soc/kirkwood/kirkwood.h @@ -131,6 +131,8 @@ struct kirkwood_dma_data { void __iomem *io; + void __iomem *pll_config; + void __iomem *soc_control; struct clk *clk; struct clk *extclk; uint32_t ctl_play;