diff options
author | Lubomir Rintel <lkundrak@v3.sk> | 2020-05-11 23:01:34 +0200 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2020-05-19 20:52:49 +0100 |
commit | a97e384ba78fd8bf7ba8c32718424d8a7536416e (patch) | |
tree | 17a048ef526c1c4524b5393716924a784beb4103 /sound/soc/pxa | |
parent | ce5955866d971864a6cd8d012411ec96b048a696 (diff) | |
download | lwn-a97e384ba78fd8bf7ba8c32718424d8a7536416e.tar.gz lwn-a97e384ba78fd8bf7ba8c32718424d8a7536416e.zip |
ASoC: mmp-sspa: Add Device Tree support
This makes it possible to select CONFIG_SND_MMP_SOC_SSPA directly, as
opposed to via CONFIG_SND_MMP_SOC, and for the driver to bind to a device
tree node. That makes the driver useful on Device Tree based systems,
with audio-graph-card or simple-card.
The aforementioned card drivers control the master clock themselves and
don't call the set_dai_sysclk() or set_dai_pll(), thus the respective
handlers don't serve any purpose anymore. Instead, they return early and
the hw_params() handler sets the appropriate bitclk itself.
The register range is split into two -- for the RX block and for the TX
block. On a MMP2 there are two pairs of them; the first one has the
clock controller in the middle, while the second just has a hole:
0xd42a0c00 - 0xd42a0c30 RX1
0xd42a0c30 - 0xd42a0c40 Clocks
0xd42a0c80 - 0xd42a0cb0 TX1
0xd42a0d00 - 0xd42a0d30 RX2
0xd42a0d80 - 0xd42a0cb0 TX2
For this reason, mmp_sspa_write_reg() and mmp_sspa_read_reg() are
replaced with direct calls to I/O routines.
Tested on a MMP2-based OLPC XO-1.75 laptop with rt5631 coded, mmp_tdma DMA
engine and MMP2 clock controller glued together with audio-graph-card.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lore.kernel.org/r/20200511210134.1224532-12-lkundrak@v3.sk
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/pxa')
-rw-r--r-- | sound/soc/pxa/Kconfig | 20 | ||||
-rw-r--r-- | sound/soc/pxa/mmp-sspa.c | 139 | ||||
-rw-r--r-- | sound/soc/pxa/mmp-sspa.h | 28 |
3 files changed, 113 insertions, 74 deletions
diff --git a/sound/soc/pxa/Kconfig b/sound/soc/pxa/Kconfig index d4c0f580a565..7ad2fd7e653b 100644 --- a/sound/soc/pxa/Kconfig +++ b/sound/soc/pxa/Kconfig @@ -9,14 +9,8 @@ config SND_PXA2XX_SOC to select the audio interfaces to support below. config SND_MMP_SOC - bool "Soc Audio for Marvell MMP chips" - depends on ARCH_MMP + bool select MMP_SRAM - select SND_SOC_GENERIC_DMAENGINE_PCM - select SND_ARM - help - Say Y if you want to add support for codecs attached to - the MMP SSPA interface. config SND_PXA2XX_AC97 tristate @@ -39,7 +33,13 @@ config SND_PXA_SOC_SSP select SND_PXA2XX_LIB config SND_MMP_SOC_SSPA - tristate + tristate "SoC Audio via MMP SSPA ports" + depends on ARCH_MMP + select SND_SOC_GENERIC_DMAENGINE_PCM + select SND_ARM + help + Say Y if you want to add support for codecs attached to + the MMP SSPA interface. config SND_PXA2XX_SOC_CORGI tristate "SoC Audio support for Sharp Zaurus SL-C7x0" @@ -232,8 +232,8 @@ config SND_PXA2XX_SOC_IMOTE2 config SND_MMP_SOC_BROWNSTONE tristate "SoC Audio support for Marvell Brownstone" - depends on SND_MMP_SOC && MACH_BROWNSTONE && I2C - select SND_MMP_SOC_SSPA + depends on SND_MMP_SOC_SSPA && MACH_BROWNSTONE && I2C + select SND_MMP_SOC select MFD_WM8994 select SND_SOC_WM8994 help diff --git a/sound/soc/pxa/mmp-sspa.c b/sound/soc/pxa/mmp-sspa.c index 86277471974a..b0accd49c89d 100644 --- a/sound/soc/pxa/mmp-sspa.c +++ b/sound/soc/pxa/mmp-sspa.c @@ -28,27 +28,20 @@ * SSPA audio private data */ struct sspa_priv { - void __iomem *mmio_base; + void __iomem *tx_base; + void __iomem *rx_base; + struct snd_dmaengine_dai_dma_data playback_dma_data; struct snd_dmaengine_dai_dma_data capture_dma_data; struct clk *clk; struct clk *audio_clk; struct clk *sysclk; + int running_cnt; u32 sp; u32 ctrl; }; -static void mmp_sspa_write_reg(struct sspa_priv *sspa, u32 reg, u32 val) -{ - __raw_writel(val, sspa->mmio_base + reg); -} - -static u32 mmp_sspa_read_reg(struct sspa_priv *sspa, u32 reg) -{ - return __raw_readl(sspa->mmio_base + reg); -} - static void mmp_sspa_tx_enable(struct sspa_priv *sspa) { unsigned int sspa_sp = sspa->sp; @@ -56,7 +49,7 @@ static void mmp_sspa_tx_enable(struct sspa_priv *sspa) sspa_sp &= ~SSPA_SP_MSL; sspa_sp |= SSPA_SP_S_EN; sspa_sp |= SSPA_SP_WEN; - mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp); + __raw_writel(sspa_sp, sspa->tx_base + SSPA_SP); } static void mmp_sspa_tx_disable(struct sspa_priv *sspa) @@ -66,7 +59,7 @@ static void mmp_sspa_tx_disable(struct sspa_priv *sspa) sspa_sp &= ~SSPA_SP_MSL; sspa_sp &= ~SSPA_SP_S_EN; sspa_sp |= SSPA_SP_WEN; - mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp); + __raw_writel(sspa_sp, sspa->tx_base + SSPA_SP); } static void mmp_sspa_rx_enable(struct sspa_priv *sspa) @@ -75,7 +68,7 @@ static void mmp_sspa_rx_enable(struct sspa_priv *sspa) sspa_sp |= SSPA_SP_S_EN; sspa_sp |= SSPA_SP_WEN; - mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp); + __raw_writel(sspa_sp, sspa->rx_base + SSPA_SP); } static void mmp_sspa_rx_disable(struct sspa_priv *sspa) @@ -84,7 +77,7 @@ static void mmp_sspa_rx_disable(struct sspa_priv *sspa) sspa_sp &= ~SSPA_SP_S_EN; sspa_sp |= SSPA_SP_WEN; - mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp); + __raw_writel(sspa_sp, sspa->rx_base + SSPA_SP); } static int mmp_sspa_startup(struct snd_pcm_substream *substream, @@ -105,7 +98,6 @@ static void mmp_sspa_shutdown(struct snd_pcm_substream *substream, clk_disable_unprepare(sspa->clk); clk_disable_unprepare(sspa->sysclk); - } /* @@ -115,8 +107,12 @@ static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, unsigned int freq, int dir) { struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai); + struct device *dev = cpu_dai->component->dev; int ret = 0; + if (dev->of_node) + return -ENOTSUPP; + switch (clk_id) { case MMP_SSPA_CLK_AUDIO: ret = clk_set_rate(sspa->audio_clk, freq); @@ -139,8 +135,12 @@ static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id, unsigned int freq_out) { struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai); + struct device *dev = cpu_dai->component->dev; int ret = 0; + if (dev->of_node) + return -ENOTSUPP; + switch (pll_id) { case MMP_SYSCLK: ret = clk_set_rate(sspa->sysclk, freq_out); @@ -213,6 +213,7 @@ static int mmp_sspa_hw_params(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai); + struct device *dev = dai->component->dev; u32 sspa_ctrl = sspa->ctrl; int bits; int bitval; @@ -238,7 +239,7 @@ static int mmp_sspa_hw_params(struct snd_pcm_substream *substream, return -EINVAL; } - if (params_channels(params) == 2) + if (dev->of_node || params_channels(params) == 2) sspa_ctrl |= SSPA_CTL_XPH; sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK; @@ -256,12 +257,17 @@ static int mmp_sspa_hw_params(struct snd_pcm_substream *substream, sspa->sp &= ~SSPA_TXSP_FPER_MASK; sspa->sp |= SSPA_TXSP_FPER(bits * 2 - 1); + if (dev->of_node) { + clk_set_rate(sspa->clk, params_rate(params) * + params_channels(params) * bits); + } + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl); - mmp_sspa_write_reg(sspa, SSPA_TXFIFO_LL, 0x1); + __raw_writel(sspa_ctrl, sspa->tx_base + SSPA_CTL); + __raw_writel(0x1, sspa->tx_base + SSPA_FIFO_UL); } else { - mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl); - mmp_sspa_write_reg(sspa, SSPA_RXFIFO_UL, 0x0); + __raw_writel(sspa_ctrl, sspa->rx_base + SSPA_CTL); + __raw_writel(0x0, sspa->rx_base + SSPA_FIFO_UL); } return 0; @@ -410,19 +416,19 @@ static int mmp_sspa_open(struct snd_soc_component *component, pm_runtime_get_sync(component->dev); /* we can only change the settings if the port is not in use */ - if ((mmp_sspa_read_reg(sspa, SSPA_TXSP) & SSPA_SP_S_EN) || - (mmp_sspa_read_reg(sspa, SSPA_RXSP) & SSPA_SP_S_EN)) { + if ((__raw_readl(sspa->tx_base + SSPA_SP) & SSPA_SP_S_EN) || + (__raw_readl(sspa->rx_base + SSPA_SP) & SSPA_SP_S_EN)) { dev_err(component->dev, "can't change hardware dai format: stream is in use\n"); return -EBUSY; } - mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa->sp); - mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa->sp); + __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP); + __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP); sspa->sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH); - mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa->sp); - mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa->sp); + __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP); + __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP); /* * FIXME: hw issue, for the tx serial port, @@ -431,10 +437,10 @@ static int mmp_sspa_open(struct snd_soc_component *component, * The master/slave mode has been set in the * rx port. */ - mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa->sp & ~SSPA_SP_MSL); + __raw_writel(sspa->sp & ~SSPA_SP_MSL, sspa->tx_base + SSPA_SP); - mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa->ctrl); - mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa->ctrl); + __raw_writel(sspa->ctrl, sspa->tx_base + SSPA_CTL); + __raw_writel(sspa->ctrl, sspa->rx_base + SSPA_CTL); return 0; } @@ -462,22 +468,51 @@ static int asoc_mmp_sspa_probe(struct platform_device *pdev) if (!sspa) return -ENOMEM; - sspa->mmio_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(sspa->mmio_base)) - return PTR_ERR(sspa->mmio_base); + if (pdev->dev.of_node) { + sspa->rx_base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(sspa->rx_base)) + return PTR_ERR(sspa->rx_base); - sspa->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(sspa->clk)) - return PTR_ERR(sspa->clk); + sspa->tx_base = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(sspa->tx_base)) + return PTR_ERR(sspa->tx_base); - sspa->audio_clk = clk_get(NULL, "mmp-audio"); - if (IS_ERR(sspa->audio_clk)) - return PTR_ERR(sspa->audio_clk); + sspa->clk = devm_clk_get(&pdev->dev, "bitclk"); + if (IS_ERR(sspa->clk)) + return PTR_ERR(sspa->clk); - sspa->sysclk = clk_get(NULL, "mmp-sysclk"); - if (IS_ERR(sspa->sysclk)) { - clk_put(sspa->audio_clk); - return PTR_ERR(sspa->sysclk); + sspa->audio_clk = devm_clk_get(&pdev->dev, "audio"); + if (IS_ERR(sspa->audio_clk)) + return PTR_ERR(sspa->audio_clk); + } else { + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (res == NULL) + return -ENODEV; + + sspa->rx_base = devm_ioremap(&pdev->dev, res->start, 0x30); + if (IS_ERR(sspa->rx_base)) + return PTR_ERR(sspa->rx_base); + + sspa->tx_base = devm_ioremap(&pdev->dev, + res->start + 0x80, 0x30); + if (IS_ERR(sspa->tx_base)) + return PTR_ERR(sspa->tx_base); + + sspa->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(sspa->clk)) + return PTR_ERR(sspa->clk); + + sspa->audio_clk = clk_get(NULL, "mmp-audio"); + if (IS_ERR(sspa->audio_clk)) + return PTR_ERR(sspa->audio_clk); + + sspa->sysclk = clk_get(NULL, "mmp-sysclk"); + if (IS_ERR(sspa->sysclk)) { + clk_put(sspa->audio_clk); + return PTR_ERR(sspa->sysclk); + } } pm_runtime_enable(&pdev->dev); clk_prepare_enable(sspa->audio_clk); @@ -486,8 +521,8 @@ static int asoc_mmp_sspa_probe(struct platform_device *pdev) sspa->playback_dma_data.maxburst = 4; sspa->capture_dma_data.maxburst = 4; /* You know, these addresses are actually ignored. */ - sspa->playback_dma_data.addr = SSPA_TXD; - sspa->capture_dma_data.addr = SSPA_RXD; + sspa->capture_dma_data.addr = SSPA_D; + sspa->playback_dma_data.addr = 0x80 + SSPA_D; if (pdev->dev.of_node) { int ret; @@ -508,14 +543,28 @@ static int asoc_mmp_sspa_remove(struct platform_device *pdev) clk_disable_unprepare(sspa->audio_clk); pm_runtime_disable(&pdev->dev); + + if (pdev->dev.of_node) + return 0; + clk_put(sspa->audio_clk); clk_put(sspa->sysclk); return 0; } +#ifdef CONFIG_OF +static const struct of_device_id mmp_sspa_of_match[] = { + { .compatible = "marvell,mmp-sspa" }, + {}, +}; + +MODULE_DEVICE_TABLE(of, mmp_sspa_of_match); +#endif + static struct platform_driver asoc_mmp_sspa_driver = { .driver = { .name = "mmp-sspa-dai", + .of_match_table = of_match_ptr(mmp_sspa_of_match), }, .probe = asoc_mmp_sspa_probe, .remove = asoc_mmp_sspa_remove, diff --git a/sound/soc/pxa/mmp-sspa.h b/sound/soc/pxa/mmp-sspa.h index 328969b57ad1..938ef2f667e3 100644 --- a/sound/soc/pxa/mmp-sspa.h +++ b/sound/soc/pxa/mmp-sspa.h @@ -10,25 +10,15 @@ /* * SSPA Registers */ -#define SSPA_RXD (0x00) -#define SSPA_RXID (0x04) -#define SSPA_RXCTL (0x08) -#define SSPA_RXSP (0x0c) -#define SSPA_RXFIFO_UL (0x10) -#define SSPA_RXINT_MASK (0x14) -#define SSPA_RXC (0x18) -#define SSPA_RXFIFO_NOFS (0x1c) -#define SSPA_RXFIFO_SIZE (0x20) - -#define SSPA_TXD (0x80) -#define SSPA_TXID (0x84) -#define SSPA_TXCTL (0x88) -#define SSPA_TXSP (0x8c) -#define SSPA_TXFIFO_LL (0x90) -#define SSPA_TXINT_MASK (0x94) -#define SSPA_TXC (0x98) -#define SSPA_TXFIFO_NOFS (0x9c) -#define SSPA_TXFIFO_SIZE (0xa0) +#define SSPA_D (0x00) +#define SSPA_ID (0x04) +#define SSPA_CTL (0x08) +#define SSPA_SP (0x0c) +#define SSPA_FIFO_UL (0x10) +#define SSPA_INT_MASK (0x14) +#define SSPA_C (0x18) +#define SSPA_FIFO_NOFS (0x1c) +#define SSPA_FIFO_SIZE (0x20) /* SSPA Control Register */ #define SSPA_CTL_XPH (1 << 31) /* Read Phase */ |