[v1,08/10] ASoC: loongson: Add I2S controller driver as platform device

Message ID	282dadefdaac7917fd681a6e84a5f0f07d0557bc.1725518229.git.zhoubinbin@loongson.cn (mailing list archive)
State	New
Headers	show Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id B29A9192B65; Thu, 5 Sep 2024 07:07:32 +0000 (UTC) From: Binbin Zhou <zhoubinbin@loongson.cn> To: Binbin Zhou <zhoubb.aaron@gmail.com>, Huacai Chen <chenhuacai@loongson.cn>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com> Cc: Huacai Chen <chenhuacai@kernel.org>, devicetree@vger.kernel.org, linux-sound@vger.kernel.org, Xuerui Wang <kernel@xen0n.name>, loongarch@lists.linux.dev, Binbin Zhou <zhoubinbin@loongson.cn> Subject: [PATCH v1 08/10] ASoC: loongson: Add I2S controller driver as platform device Date: Thu, 5 Sep 2024 15:07:21 +0800 Message-ID: <282dadefdaac7917fd681a6e84a5f0f07d0557bc.1725518229.git.zhoubinbin@loongson.cn> In-Reply-To: <cover.1725518229.git.zhoubinbin@loongson.cn> References: <cover.1725518229.git.zhoubinbin@loongson.cn> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	ASoC: Some issues about loongson i2s \| expand [v1,00/10] ASoC: Some issues about loongson i2s [v1,01/10] ASoC: dt-bindings: Add Everest ES8323 Codec [v1,02/10] ASoC: codecs: Add support for ES8323 [v1,03/10] ASoC: dt-bindings: Add NXP uda1342 Codec [v1,04/10] ASoC: codecs: Add uda1342 codec driver [v1,05/10] ASoC: loongson: Improve code readability [v1,06/10] ASoC: loongson: Fix codec detection failure on FDT systems [v1,07/10] ASoC: dt-bindings: Add Loongson I2S controller [v1,08/10] ASoC: loongson: Add I2S controller driver as platform device [v1,09/10] LoongArch: dts: Add I2S support to Loongson-2K1000 [v1,10/10] LoongArch: dts: Add I2S support to Loongson-2K2000

diff --git a/sound/soc/loongson/Kconfig b/sound/soc/loongson/Kconfig index b8d7e2bade24..cd298f8b54cd 100644 --- a/sound/soc/loongson/Kconfig +++ b/sound/soc/loongson/Kconfig @@ -13,10 +13,20 @@ config SND_SOC_LOONGSON_I2S_PCI The controller is found in loongson bridge chips or SoCs, and work as a PCI device. +config SND_SOC_LOONGSON_I2S_PLATFORM + tristate "Loongson I2S controller as platform device" + select SND_SOC_GENERIC_DMAENGINE_PCM + help + Say Y or M if you want to add support for I2S driver for + Loongson I2S controller. + + The controller work as a platform device, found in loongson + SoCs. + config SND_SOC_LOONGSON_CARD tristate "Loongson Sound Card Driver" select SND_SOC_LOONGSON_I2S_PCI - depends on PCI + select SND_SOC_LOONGSON_I2S_PLATFORM help Say Y or M if you want to add support for SoC audio using loongson I2S controller. diff --git a/sound/soc/loongson/Makefile b/sound/soc/loongson/Makefile index 578030ad6563..f396259244a3 100644 --- a/sound/soc/loongson/Makefile +++ b/sound/soc/loongson/Makefile @@ -3,6 +3,9 @@ snd-soc-loongson-i2s-pci-y := loongson_i2s_pci.o loongson_i2s.o loongson_dma.o obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PCI) += snd-soc-loongson-i2s-pci.o +snd-soc-loongson-i2s-plat-y := loongson_i2s_plat.o loongson_i2s.o +obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PLATFORM) += snd-soc-loongson-i2s-plat.o + #Machine Support snd-soc-loongson-card-y := loongson_card.o obj-$(CONFIG_SND_SOC_LOONGSON_CARD) += snd-soc-loongson-card.o diff --git a/sound/soc/loongson/loongson_i2s_plat.c b/sound/soc/loongson/loongson_i2s_plat.c new file mode 100644 index 000000000000..668067753b1c --- /dev/null +++ b/sound/soc/loongson/loongson_i2s_plat.c @@ -0,0 +1,186 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Loongson I2S controller master mode dirver(platform device) + * + * Copyright (C) 2023-2024 Loongson Technology Corporation Limited + * + * Author: Yingkun Meng <mengyingkun@loongson.cn> + * Binbin Zhou <zhoubinbin@loongson.cn> + */ + +#include <linux/clk.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/of_dma.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#include "loongson_i2s.h" + +#define LOONGSON_I2S_RX_DMA_OFFSET 21 +#define LOONGSON_I2S_TX_DMA_OFFSET 18 + +#define LOONGSON_DMA0_CONF 0x0 +#define LOONGSON_DMA1_CONF 0x1 +#define LOONGSON_DMA2_CONF 0x2 +#define LOONGSON_DMA3_CONF 0x3 +#define LOONGSON_DMA4_CONF 0x4 + +/* periods_max = PAGE_SIZE / sizeof(struct ls_dma_chan_reg) */ +static const struct snd_pcm_hardware loongson_pcm_hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_PAUSE, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S20_3LE | + SNDRV_PCM_FMTBIT_S24_LE, + .period_bytes_min = 128, + .period_bytes_max = 128 * 1024, + .periods_min = 1, + .periods_max = 64, + .buffer_bytes_max = 1024 * 1024, +}; + +static const struct snd_dmaengine_pcm_config loongson_dmaengine_pcm_config = { + .pcm_hardware = &loongson_pcm_hardware, + .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, + .prealloc_buffer_size = 128 * 1024, +}; + +static int loongson_pcm_open(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + + if (substream->pcm->device & 1) { + runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; + runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; + } + + if (substream->pcm->device & 2) + runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID); + /* + * For mysterious reasons (and despite what the manual says) + * playback samples are lost if the DMA count is not a multiple + * of the DMA burst size. Let's add a rule to enforce that. + */ + snd_pcm_hw_constraint_step(runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128); + snd_pcm_hw_constraint_step(runtime, 0, + SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 128); + snd_pcm_hw_constraint_integer(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + + return 0; +} + +static const struct snd_soc_component_driver loongson_i2s_component_driver = { + .name = LS_I2S_DRVNAME, + .open = loongson_pcm_open, +}; + +static const struct regmap_config loongson_i2s_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = 0x14, + .cache_type = REGCACHE_FLAT, +}; + +static int loongson_i2s_apbdma_config(struct platform_device *pdev) +{ + int val; + void __iomem *regs; + + regs = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + val = readl(regs); + val |= LOONGSON_DMA2_CONF << LOONGSON_I2S_TX_DMA_OFFSET; + val |= LOONGSON_DMA3_CONF << LOONGSON_I2S_RX_DMA_OFFSET; + writel(val, regs); + + return 0; +} + +static int loongson_i2s_plat_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct loongson_i2s *i2s; + struct resource *res; + struct clk *i2s_clk; + int ret; + + i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL); + if (!i2s) + return -ENOMEM; + + ret = loongson_i2s_apbdma_config(pdev); + if (ret) + return ret; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + i2s->reg_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(i2s->reg_base)) + return dev_err_probe(dev, PTR_ERR(i2s->reg_base), + "devm_ioremap_resource failed\n"); + + i2s->regmap = devm_regmap_init_mmio(dev, i2s->reg_base, + &loongson_i2s_regmap_config); + if (IS_ERR(i2s->regmap)) + return dev_err_probe(dev, PTR_ERR(i2s->regmap), + "devm_regmap_init_mmio failed\n"); + + i2s->playback_dma_data.addr = res->start + LS_I2S_TX_DATA; + i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + i2s->playback_dma_data.maxburst = 4; + + i2s->capture_dma_data.addr = res->start + LS_I2S_RX_DATA; + i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + i2s->capture_dma_data.maxburst = 4; + + i2s_clk = devm_clk_get_enabled(dev, NULL); + if (IS_ERR(i2s_clk)) + return dev_err_probe(dev, PTR_ERR(i2s_clk), "clock property invalid\n"); + i2s->clk_rate = clk_get_rate(i2s_clk); + + dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); + dev_set_name(dev, LS_I2S_DRVNAME); + dev_set_drvdata(dev, i2s); + + ret = devm_snd_soc_register_component(dev, &loongson_i2s_component_driver, + &loongson_i2s_dai, 1); + if (ret) + return dev_err_probe(dev, ret, "failed to register DAI\n"); + + return devm_snd_dmaengine_pcm_register(dev, &loongson_dmaengine_pcm_config, + SND_DMAENGINE_PCM_FLAG_COMPAT); +} + +static const struct of_device_id loongson_i2s_ids[] = { + { .compatible = "loongson,ls2k1000-i2s" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, loongson_i2s_ids); + +static struct platform_driver loongson_i2s_driver = { + .probe = loongson_i2s_plat_probe, + .driver = { + .name = "loongson-i2s-plat", + .pm = pm_sleep_ptr(&loongson_i2s_pm), + .of_match_table = loongson_i2s_ids, + }, +}; +module_platform_driver(loongson_i2s_driver); + +MODULE_DESCRIPTION("Loongson I2S Master Mode ASoC Driver"); +MODULE_AUTHOR("Loongson Technology Corporation Limited"); +MODULE_LICENSE("GPL");

[v1,08/10] ASoC: loongson: Add I2S controller driver as platform device

Commit Message

Comments

Patch