diff options
Diffstat (limited to 'sound/soc/amd/yc/pci-acp6x.c')
| -rw-r--r-- | sound/soc/amd/yc/pci-acp6x.c | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/sound/soc/amd/yc/pci-acp6x.c b/sound/soc/amd/yc/pci-acp6x.c new file mode 100644 index 0000000000..7af6a349b1 --- /dev/null +++ b/sound/soc/amd/yc/pci-acp6x.c @@ -0,0 +1,350 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AMD Yellow Carp ACP PCI Driver + * + * Copyright 2021 Advanced Micro Devices, Inc. + */ + +#include <linux/pci.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <sound/pcm_params.h> +#include <linux/pm_runtime.h> + +#include "acp6x.h" + +struct acp6x_dev_data { + void __iomem *acp6x_base; + struct resource *res; + bool acp6x_audio_mode; + struct platform_device *pdev[ACP6x_DEVS]; +}; + +static int acp6x_power_on(void __iomem *acp_base) +{ + u32 val; + int timeout; + + val = acp6x_readl(acp_base + ACP_PGFSM_STATUS); + + if (!val) + return val; + + if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS) + acp6x_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = acp6x_readl(acp_base + ACP_PGFSM_STATUS); + if (!val) + return 0; + udelay(1); + } + return -ETIMEDOUT; +} + +static int acp6x_reset(void __iomem *acp_base) +{ + u32 val; + int timeout; + + acp6x_writel(1, acp_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = acp6x_readl(acp_base + ACP_SOFT_RESET); + if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) + break; + cpu_relax(); + } + acp6x_writel(0, acp_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = acp6x_readl(acp_base + ACP_SOFT_RESET); + if (!val) + return 0; + cpu_relax(); + } + return -ETIMEDOUT; +} + +static void acp6x_enable_interrupts(void __iomem *acp_base) +{ + acp6x_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB); +} + +static void acp6x_disable_interrupts(void __iomem *acp_base) +{ + acp6x_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + + ACP_EXTERNAL_INTR_STAT); + acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_CNTL); + acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB); +} + +static int acp6x_init(void __iomem *acp_base) +{ + int ret; + + /* power on */ + ret = acp6x_power_on(acp_base); + if (ret) { + pr_err("ACP power on failed\n"); + return ret; + } + acp6x_writel(0x01, acp_base + ACP_CONTROL); + /* Reset */ + ret = acp6x_reset(acp_base); + if (ret) { + pr_err("ACP reset failed\n"); + return ret; + } + acp6x_writel(0x03, acp_base + ACP_CLKMUX_SEL); + acp6x_enable_interrupts(acp_base); + return 0; +} + +static int acp6x_deinit(void __iomem *acp_base) +{ + int ret; + + acp6x_disable_interrupts(acp_base); + /* Reset */ + ret = acp6x_reset(acp_base); + if (ret) { + pr_err("ACP reset failed\n"); + return ret; + } + acp6x_writel(0x00, acp_base + ACP_CLKMUX_SEL); + acp6x_writel(0x00, acp_base + ACP_CONTROL); + return 0; +} + +static irqreturn_t acp6x_irq_handler(int irq, void *dev_id) +{ + struct acp6x_dev_data *adata; + struct pdm_dev_data *yc_pdm_data; + u32 val; + + adata = dev_id; + if (!adata) + return IRQ_NONE; + + val = acp6x_readl(adata->acp6x_base + ACP_EXTERNAL_INTR_STAT); + if (val & BIT(PDM_DMA_STAT)) { + yc_pdm_data = dev_get_drvdata(&adata->pdev[0]->dev); + acp6x_writel(BIT(PDM_DMA_STAT), adata->acp6x_base + ACP_EXTERNAL_INTR_STAT); + if (yc_pdm_data->capture_stream) + snd_pcm_period_elapsed(yc_pdm_data->capture_stream); + return IRQ_HANDLED; + } + return IRQ_NONE; +} + +static int snd_acp6x_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + struct acp6x_dev_data *adata; + struct platform_device_info pdevinfo[ACP6x_DEVS]; + int index = 0; + int val = 0x00; + u32 addr; + unsigned int irqflags, flag; + int ret; + + irqflags = IRQF_SHARED; + + /* Return if acp config flag is defined */ + flag = snd_amd_acp_find_config(pci); + if (flag) + return -ENODEV; + + /* Yellow Carp device check */ + switch (pci->revision) { + case 0x60: + case 0x6f: + break; + default: + dev_dbg(&pci->dev, "acp6x pci device not found\n"); + return -ENODEV; + } + if (pci_enable_device(pci)) { + dev_err(&pci->dev, "pci_enable_device failed\n"); + return -ENODEV; + } + + ret = pci_request_regions(pci, "AMD ACP3x audio"); + if (ret < 0) { + dev_err(&pci->dev, "pci_request_regions failed\n"); + goto disable_pci; + } + + adata = devm_kzalloc(&pci->dev, sizeof(struct acp6x_dev_data), + GFP_KERNEL); + if (!adata) { + ret = -ENOMEM; + goto release_regions; + } + + addr = pci_resource_start(pci, 0); + adata->acp6x_base = devm_ioremap(&pci->dev, addr, + pci_resource_len(pci, 0)); + if (!adata->acp6x_base) { + ret = -ENOMEM; + goto release_regions; + } + pci_set_master(pci); + pci_set_drvdata(pci, adata); + ret = acp6x_init(adata->acp6x_base); + if (ret) + goto release_regions; + val = acp6x_readl(adata->acp6x_base + ACP_PIN_CONFIG); + switch (val) { + case ACP_CONFIG_0: + case ACP_CONFIG_1: + case ACP_CONFIG_2: + case ACP_CONFIG_3: + case ACP_CONFIG_9: + case ACP_CONFIG_15: + dev_info(&pci->dev, "Audio Mode %d\n", val); + break; + default: + adata->res = devm_kzalloc(&pci->dev, + sizeof(struct resource), + GFP_KERNEL); + if (!adata->res) { + ret = -ENOMEM; + goto de_init; + } + + adata->res->name = "acp_iomem"; + adata->res->flags = IORESOURCE_MEM; + adata->res->start = addr; + adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START); + + adata->acp6x_audio_mode = ACP6x_PDM_MODE; + + memset(&pdevinfo, 0, sizeof(pdevinfo)); + pdevinfo[0].name = "acp_yc_pdm_dma"; + pdevinfo[0].id = 0; + pdevinfo[0].parent = &pci->dev; + pdevinfo[0].num_res = 1; + pdevinfo[0].res = adata->res; + + pdevinfo[1].name = "dmic-codec"; + pdevinfo[1].id = 0; + pdevinfo[1].parent = &pci->dev; + + pdevinfo[2].name = "acp_yc_mach"; + pdevinfo[2].id = 0; + pdevinfo[2].parent = &pci->dev; + + for (index = 0; index < ACP6x_DEVS; index++) { + adata->pdev[index] = + platform_device_register_full(&pdevinfo[index]); + if (IS_ERR(adata->pdev[index])) { + dev_err(&pci->dev, "cannot register %s device\n", + pdevinfo[index].name); + ret = PTR_ERR(adata->pdev[index]); + goto unregister_devs; + } + } + break; + } + ret = devm_request_irq(&pci->dev, pci->irq, acp6x_irq_handler, + irqflags, "ACP_PCI_IRQ", adata); + if (ret) { + dev_err(&pci->dev, "ACP PCI IRQ request failed\n"); + goto unregister_devs; + } + pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS); + pm_runtime_use_autosuspend(&pci->dev); + pm_runtime_put_noidle(&pci->dev); + pm_runtime_allow(&pci->dev); + + return 0; +unregister_devs: + for (--index; index >= 0; index--) + platform_device_unregister(adata->pdev[index]); +de_init: + if (acp6x_deinit(adata->acp6x_base)) + dev_err(&pci->dev, "ACP de-init failed\n"); +release_regions: + pci_release_regions(pci); +disable_pci: + pci_disable_device(pci); + + return ret; +} + +static int __maybe_unused snd_acp6x_suspend(struct device *dev) +{ + struct acp6x_dev_data *adata; + int ret; + + adata = dev_get_drvdata(dev); + ret = acp6x_deinit(adata->acp6x_base); + if (ret) + dev_err(dev, "ACP de-init failed\n"); + return ret; +} + +static int __maybe_unused snd_acp6x_resume(struct device *dev) +{ + struct acp6x_dev_data *adata; + int ret; + + adata = dev_get_drvdata(dev); + ret = acp6x_init(adata->acp6x_base); + if (ret) + dev_err(dev, "ACP init failed\n"); + return ret; +} + +static const struct dev_pm_ops acp6x_pm = { + SET_RUNTIME_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume) +}; + +static void snd_acp6x_remove(struct pci_dev *pci) +{ + struct acp6x_dev_data *adata; + int ret, index; + + adata = pci_get_drvdata(pci); + if (adata->acp6x_audio_mode == ACP6x_PDM_MODE) { + for (index = 0; index < ACP6x_DEVS; index++) + platform_device_unregister(adata->pdev[index]); + } + ret = acp6x_deinit(adata->acp6x_base); + if (ret) + dev_err(&pci->dev, "ACP de-init failed\n"); + pm_runtime_forbid(&pci->dev); + pm_runtime_get_noresume(&pci->dev); + pci_release_regions(pci); + pci_disable_device(pci); +} + +static const struct pci_device_id snd_acp6x_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID), + .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, + .class_mask = 0xffffff }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, snd_acp6x_ids); + +static struct pci_driver yc_acp6x_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_acp6x_ids, + .probe = snd_acp6x_probe, + .remove = snd_acp6x_remove, + .driver = { + .pm = &acp6x_pm, + } +}; + +module_pci_driver(yc_acp6x_driver); + +MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); +MODULE_DESCRIPTION("AMD ACP Yellow Carp PCI driver"); +MODULE_LICENSE("GPL v2"); |