diff options
Diffstat (limited to 'sound/soc/amd/renoir/rn-pci-acp3x.c')
| -rw-r--r-- | sound/soc/amd/renoir/rn-pci-acp3x.c | 420 |
1 files changed, 420 insertions, 0 deletions
diff --git a/sound/soc/amd/renoir/rn-pci-acp3x.c b/sound/soc/amd/renoir/rn-pci-acp3x.c new file mode 100644 index 000000000..917536def --- /dev/null +++ b/sound/soc/amd/renoir/rn-pci-acp3x.c @@ -0,0 +1,420 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// AMD Renoir ACP PCI Driver +// +//Copyright 2020 Advanced Micro Devices, Inc. + +#include <linux/pci.h> +#include <linux/acpi.h> +#include <linux/dmi.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/pm_runtime.h> + +#include "rn_acp3x.h" + +static int acp_power_gating; +module_param(acp_power_gating, int, 0644); +MODULE_PARM_DESC(acp_power_gating, "Enable acp power gating"); + +/** + * dmic_acpi_check = -1 - Use ACPI/DMI method to detect the DMIC hardware presence at runtime + * = 0 - Skip the DMIC device creation and return probe failure + * = 1 - Force DMIC support + */ +static int dmic_acpi_check = ACP_DMIC_AUTO; +module_param(dmic_acpi_check, bint, 0644); +MODULE_PARM_DESC(dmic_acpi_check, "Digital microphone presence (-1=auto, 0=none, 1=force)"); + +struct acp_dev_data { + void __iomem *acp_base; + struct resource *res; + struct platform_device *pdev[ACP_DEVS]; +}; + +static int rn_acp_power_on(void __iomem *acp_base) +{ + u32 val; + int timeout; + + val = rn_readl(acp_base + ACP_PGFSM_STATUS); + + if (val == 0) + return val; + + if ((val & ACP_PGFSM_STATUS_MASK) != + ACP_POWER_ON_IN_PROGRESS) + rn_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, + acp_base + ACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = rn_readl(acp_base + ACP_PGFSM_STATUS); + if (!val) + return 0; + udelay(1); + } + return -ETIMEDOUT; +} + +static int rn_acp_power_off(void __iomem *acp_base) +{ + u32 val; + int timeout; + + rn_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK, + acp_base + ACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = rn_readl(acp_base + ACP_PGFSM_STATUS); + if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF) + return 0; + udelay(1); + } + return -ETIMEDOUT; +} + +static int rn_acp_reset(void __iomem *acp_base) +{ + u32 val; + int timeout; + + rn_writel(1, acp_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = rn_readl(acp_base + ACP_SOFT_RESET); + if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) + break; + cpu_relax(); + } + rn_writel(0, acp_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = rn_readl(acp_base + ACP_SOFT_RESET); + if (!val) + return 0; + cpu_relax(); + } + return -ETIMEDOUT; +} + +static void rn_acp_enable_interrupts(void __iomem *acp_base) +{ + u32 ext_intr_ctrl; + + rn_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB); + ext_intr_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); + ext_intr_ctrl |= ACP_ERROR_MASK; + rn_writel(ext_intr_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); +} + +static void rn_acp_disable_interrupts(void __iomem *acp_base) +{ + rn_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + + ACP_EXTERNAL_INTR_STAT); + rn_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB); +} + +static int rn_acp_init(void __iomem *acp_base) +{ + int ret; + + /* power on */ + ret = rn_acp_power_on(acp_base); + if (ret) { + pr_err("ACP power on failed\n"); + return ret; + } + rn_writel(0x01, acp_base + ACP_CONTROL); + /* Reset */ + ret = rn_acp_reset(acp_base); + if (ret) { + pr_err("ACP reset failed\n"); + return ret; + } + rn_writel(0x03, acp_base + ACP_CLKMUX_SEL); + rn_acp_enable_interrupts(acp_base); + return 0; +} + +static int rn_acp_deinit(void __iomem *acp_base) +{ + int ret; + + rn_acp_disable_interrupts(acp_base); + /* Reset */ + ret = rn_acp_reset(acp_base); + if (ret) { + pr_err("ACP reset failed\n"); + return ret; + } + rn_writel(0x00, acp_base + ACP_CLKMUX_SEL); + rn_writel(0x00, acp_base + ACP_CONTROL); + /* power off */ + if (acp_power_gating) { + ret = rn_acp_power_off(acp_base); + if (ret) { + pr_err("ACP power off failed\n"); + return ret; + } + } + return 0; +} + +static const struct dmi_system_id rn_acp_quirk_table[] = { + { + /* Lenovo IdeaPad S340-14API */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81NB"), + } + }, + { + /* Lenovo IdeaPad Flex 5 14ARE05 */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81X2"), + } + }, + { + /* Lenovo IdeaPad 5 15ARE05 */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81YQ"), + } + }, + { + /* Lenovo ThinkPad X395 */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "20NLCTO1WW"), + } + }, + {} +}; + +static int snd_rn_acp_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + struct acp_dev_data *adata; + struct platform_device_info pdevinfo[ACP_DEVS]; +#if defined(CONFIG_ACPI) + acpi_handle handle; + acpi_integer dmic_status; +#endif + const struct dmi_system_id *dmi_id; + unsigned int irqflags; + int ret, index; + u32 addr; + + /* Renoir device check */ + if (pci->revision != 0x01) + 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 acp_dev_data), + GFP_KERNEL); + if (!adata) { + ret = -ENOMEM; + goto release_regions; + } + + /* check for msi interrupt support */ + ret = pci_enable_msi(pci); + if (ret) + /* msi is not enabled */ + irqflags = IRQF_SHARED; + else + /* msi is enabled */ + irqflags = 0; + + addr = pci_resource_start(pci, 0); + adata->acp_base = devm_ioremap(&pci->dev, addr, + pci_resource_len(pci, 0)); + if (!adata->acp_base) { + ret = -ENOMEM; + goto disable_msi; + } + pci_set_master(pci); + pci_set_drvdata(pci, adata); + ret = rn_acp_init(adata->acp_base); + if (ret) + goto disable_msi; + + if (!dmic_acpi_check) { + ret = -ENODEV; + goto de_init; + } else if (dmic_acpi_check == ACP_DMIC_AUTO) { +#if defined(CONFIG_ACPI) + handle = ACPI_HANDLE(&pci->dev); + ret = acpi_evaluate_integer(handle, "_WOV", NULL, &dmic_status); + if (ACPI_FAILURE(ret)) { + ret = -EINVAL; + goto de_init; + } + if (!dmic_status) { + ret = -ENODEV; + goto de_init; + } +#endif + dmi_id = dmi_first_match(rn_acp_quirk_table); + if (dmi_id && !dmi_id->driver_data) { + dev_info(&pci->dev, "ACPI settings override using DMI (ACP mic is not present)"); + ret = -ENODEV; + goto de_init; + } + } + + adata->res = devm_kzalloc(&pci->dev, + sizeof(struct resource) * 2, + GFP_KERNEL); + if (!adata->res) { + ret = -ENOMEM; + goto de_init; + } + + adata->res[0].name = "acp_pdm_iomem"; + adata->res[0].flags = IORESOURCE_MEM; + adata->res[0].start = addr; + adata->res[0].end = addr + (ACP_REG_END - ACP_REG_START); + adata->res[1].name = "acp_pdm_irq"; + adata->res[1].flags = IORESOURCE_IRQ; + adata->res[1].start = pci->irq; + adata->res[1].end = pci->irq; + + memset(&pdevinfo, 0, sizeof(pdevinfo)); + pdevinfo[0].name = "acp_rn_pdm_dma"; + pdevinfo[0].id = 0; + pdevinfo[0].parent = &pci->dev; + pdevinfo[0].num_res = 2; + pdevinfo[0].res = adata->res; + pdevinfo[0].data = &irqflags; + pdevinfo[0].size_data = sizeof(irqflags); + + pdevinfo[1].name = "dmic-codec"; + pdevinfo[1].id = 0; + pdevinfo[1].parent = &pci->dev; + pdevinfo[2].name = "acp_pdm_mach"; + pdevinfo[2].id = 0; + pdevinfo[2].parent = &pci->dev; + for (index = 0; index < ACP_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; + } + } + 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 = 0; index < ACP_DEVS; index++) + platform_device_unregister(adata->pdev[index]); +de_init: + if (rn_acp_deinit(adata->acp_base)) + dev_err(&pci->dev, "ACP de-init failed\n"); +disable_msi: + pci_disable_msi(pci); +release_regions: + pci_release_regions(pci); +disable_pci: + pci_disable_device(pci); + + return ret; +} + +static int snd_rn_acp_suspend(struct device *dev) +{ + int ret; + struct acp_dev_data *adata; + + adata = dev_get_drvdata(dev); + ret = rn_acp_deinit(adata->acp_base); + if (ret) + dev_err(dev, "ACP de-init failed\n"); + else + dev_dbg(dev, "ACP de-initialized\n"); + + return ret; +} + +static int snd_rn_acp_resume(struct device *dev) +{ + int ret; + struct acp_dev_data *adata; + + adata = dev_get_drvdata(dev); + ret = rn_acp_init(adata->acp_base); + if (ret) { + dev_err(dev, "ACP init failed\n"); + return ret; + } + return 0; +} + +static const struct dev_pm_ops rn_acp_pm = { + .runtime_suspend = snd_rn_acp_suspend, + .runtime_resume = snd_rn_acp_resume, + .suspend = snd_rn_acp_suspend, + .resume = snd_rn_acp_resume, +}; + +static void snd_rn_acp_remove(struct pci_dev *pci) +{ + struct acp_dev_data *adata; + int ret, index; + + adata = pci_get_drvdata(pci); + for (index = 0; index < ACP_DEVS; index++) + platform_device_unregister(adata->pdev[index]); + ret = rn_acp_deinit(adata->acp_base); + if (ret) + dev_err(&pci->dev, "ACP de-init failed\n"); + pm_runtime_forbid(&pci->dev); + pm_runtime_get_noresume(&pci->dev); + pci_disable_msi(pci); + pci_release_regions(pci); + pci_disable_device(pci); +} + +static const struct pci_device_id snd_rn_acp_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_rn_acp_ids); + +static struct pci_driver rn_acp_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_rn_acp_ids, + .probe = snd_rn_acp_probe, + .remove = snd_rn_acp_remove, + .driver = { + .pm = &rn_acp_pm, + } +}; + +module_pci_driver(rn_acp_driver); + +MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); +MODULE_DESCRIPTION("AMD ACP Renoir PCI driver"); +MODULE_LICENSE("GPL v2"); |