diff options
Diffstat (limited to 'sound/soc/ti/davinci-mcasp.c')
| -rw-r--r-- | sound/soc/ti/davinci-mcasp.c | 175 |
1 files changed, 156 insertions, 19 deletions
diff --git a/sound/soc/ti/davinci-mcasp.c b/sound/soc/ti/davinci-mcasp.c index a10fcb5963c6..a3a67a8f0f54 100644 --- a/sound/soc/ti/davinci-mcasp.c +++ b/sound/soc/ti/davinci-mcasp.c @@ -29,6 +29,7 @@ #include <linux/platform_data/davinci_asp.h> #include <linux/math64.h> #include <linux/bitmap.h> +#include <linux/gpio/driver.h> #include <sound/asoundef.h> #include <sound/core.h> @@ -54,6 +55,7 @@ static u32 context_regs[] = { DAVINCI_MCASP_AHCLKXCTL_REG, DAVINCI_MCASP_AHCLKRCTL_REG, DAVINCI_MCASP_PDIR_REG, + DAVINCI_MCASP_PFUNC_REG, DAVINCI_MCASP_RXMASK_REG, DAVINCI_MCASP_TXMASK_REG, DAVINCI_MCASP_RXTDM_REG, @@ -108,6 +110,10 @@ struct davinci_mcasp { /* Used for comstraint setting on the second stream */ u32 channels; +#ifdef CONFIG_GPIOLIB + struct gpio_chip gpio_chip; +#endif + #ifdef CONFIG_PM struct davinci_mcasp_context context; #endif @@ -818,9 +824,6 @@ static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream, if (mcasp->version < MCASP_VERSION_3) mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT); - /* All PINS as McASP */ - mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000); - if (stream == SNDRV_PCM_STREAM_PLAYBACK) { mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF); mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS); @@ -1845,6 +1848,147 @@ static u32 davinci_mcasp_rxdma_offset(struct davinci_mcasp_pdata *pdata) return offset; } +#ifdef CONFIG_GPIOLIB +static int davinci_mcasp_gpio_request(struct gpio_chip *chip, unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + + if (mcasp->num_serializer && offset < mcasp->num_serializer && + mcasp->serial_dir[offset] != INACTIVE_MODE) { + dev_err(mcasp->dev, "AXR%u pin is used for audio\n", offset); + return -EBUSY; + } + + /* Do not change the PIN yet */ + + return pm_runtime_get_sync(mcasp->dev); +} + +static void davinci_mcasp_gpio_free(struct gpio_chip *chip, unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + + /* Set the direction to input */ + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); + + /* Set the pin as McASP pin */ + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); + + pm_runtime_put_sync(mcasp->dev); +} + +static int davinci_mcasp_gpio_direction_out(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + u32 val; + + if (value) + mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); + else + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); + + val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG); + if (!(val & BIT(offset))) { + /* Set the pin as GPIO pin */ + mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); + + /* Set the direction to output */ + mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); + } + + return 0; +} + +static void davinci_mcasp_gpio_set(struct gpio_chip *chip, unsigned offset, + int value) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + + if (value) + mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); + else + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); +} + +static int davinci_mcasp_gpio_direction_in(struct gpio_chip *chip, + unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + u32 val; + + val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG); + if (!(val & BIT(offset))) { + /* Set the direction to input */ + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); + + /* Set the pin as GPIO pin */ + mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); + } + + return 0; +} + +static int davinci_mcasp_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + u32 val; + + val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDSET_REG); + if (val & BIT(offset)) + return 1; + + return 0; +} + +static int davinci_mcasp_gpio_get_direction(struct gpio_chip *chip, + unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + u32 val; + + val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG); + if (val & BIT(offset)) + return 0; + + return 1; +} + +static const struct gpio_chip davinci_mcasp_template_chip = { + .owner = THIS_MODULE, + .request = davinci_mcasp_gpio_request, + .free = davinci_mcasp_gpio_free, + .direction_output = davinci_mcasp_gpio_direction_out, + .set = davinci_mcasp_gpio_set, + .direction_input = davinci_mcasp_gpio_direction_in, + .get = davinci_mcasp_gpio_get, + .get_direction = davinci_mcasp_gpio_get_direction, + .base = -1, + .ngpio = 32, +}; + +static int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp) +{ + if (!of_property_read_bool(mcasp->dev->of_node, "gpio-controller")) + return 0; + + mcasp->gpio_chip = davinci_mcasp_template_chip; + mcasp->gpio_chip.label = dev_name(mcasp->dev); + mcasp->gpio_chip.parent = mcasp->dev; +#ifdef CONFIG_OF_GPIO + mcasp->gpio_chip.of_node = mcasp->dev->of_node; +#endif + + return devm_gpiochip_add_data(mcasp->dev, &mcasp->gpio_chip, mcasp); +} + +#else /* CONFIG_GPIOLIB */ +static inline int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp) +{ + return 0; +} +#endif /* CONFIG_GPIOLIB */ + static int davinci_mcasp_probe(struct platform_device *pdev) { struct snd_dmaengine_dai_dma_data *dma_data; @@ -2069,6 +2213,15 @@ static int davinci_mcasp_probe(struct platform_device *pdev) mcasp_reparent_fck(pdev); + /* All PINS as McASP */ + pm_runtime_get_sync(mcasp->dev); + mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000); + pm_runtime_put(mcasp->dev); + + ret = davinci_mcasp_init_gpiochip(mcasp); + if (ret) + goto err; + ret = devm_snd_soc_register_component(&pdev->dev, &davinci_mcasp_component, &davinci_mcasp_dai[pdata->op_mode], 1); @@ -2079,26 +2232,10 @@ static int davinci_mcasp_probe(struct platform_device *pdev) ret = davinci_mcasp_get_dma_type(mcasp); switch (ret) { case PCM_EDMA: -#if IS_BUILTIN(CONFIG_SND_SOC_TI_EDMA_PCM) || \ - (IS_MODULE(CONFIG_SND_SOC_DAVINCI_MCASP) && \ - IS_MODULE(CONFIG_SND_SOC_TI_EDMA_PCM)) ret = edma_pcm_platform_register(&pdev->dev); -#else - dev_err(&pdev->dev, "Missing SND_EDMA_SOC\n"); - ret = -EINVAL; - goto err; -#endif break; case PCM_SDMA: -#if IS_BUILTIN(CONFIG_SND_SOC_TI_SDMA_PCM) || \ - (IS_MODULE(CONFIG_SND_SOC_DAVINCI_MCASP) && \ - IS_MODULE(CONFIG_SND_SOC_TI_SDMA_PCM)) ret = sdma_pcm_platform_register(&pdev->dev, NULL, NULL); -#else - dev_err(&pdev->dev, "Missing SND_SDMA_SOC\n"); - ret = -EINVAL; - goto err; -#endif break; default: dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret); |