diff options
Diffstat (limited to 'sound/soc/amd/rpl/rpl-pci-acp6x.c')
| -rw-r--r-- | sound/soc/amd/rpl/rpl-pci-acp6x.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/sound/soc/amd/rpl/rpl-pci-acp6x.c b/sound/soc/amd/rpl/rpl-pci-acp6x.c new file mode 100644 index 0000000000..a8e548ed99 --- /dev/null +++ b/sound/soc/amd/rpl/rpl-pci-acp6x.c @@ -0,0 +1,227 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AMD RPL ACP PCI Driver + * + * Copyright 2022 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/pm_runtime.h> + +#include "rpl_acp6x.h" + +struct rpl_dev_data { + void __iomem *acp6x_base; +}; + +static int rpl_power_on(void __iomem *acp_base) +{ + u32 val; + int timeout; + + val = rpl_acp_readl(acp_base + ACP_PGFSM_STATUS); + + if (!val) + return val; + + if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS) + rpl_acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = rpl_acp_readl(acp_base + ACP_PGFSM_STATUS); + if (!val) + return 0; + udelay(1); + } + return -ETIMEDOUT; +} + +static int rpl_reset(void __iomem *acp_base) +{ + u32 val; + int timeout; + + rpl_acp_writel(1, acp_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = rpl_acp_readl(acp_base + ACP_SOFT_RESET); + if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) + break; + cpu_relax(); + } + rpl_acp_writel(0, acp_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = rpl_acp_readl(acp_base + ACP_SOFT_RESET); + if (!val) + return 0; + cpu_relax(); + } + return -ETIMEDOUT; +} + +static int rpl_init(void __iomem *acp_base) +{ + int ret; + + /* power on */ + ret = rpl_power_on(acp_base); + if (ret) { + pr_err("ACP power on failed\n"); + return ret; + } + rpl_acp_writel(0x01, acp_base + ACP_CONTROL); + /* Reset */ + ret = rpl_reset(acp_base); + if (ret) { + pr_err("ACP reset failed\n"); + return ret; + } + rpl_acp_writel(0x03, acp_base + ACP_CLKMUX_SEL); + return 0; +} + +static int rpl_deinit(void __iomem *acp_base) +{ + int ret; + + /* Reset */ + ret = rpl_reset(acp_base); + if (ret) { + pr_err("ACP reset failed\n"); + return ret; + } + rpl_acp_writel(0x00, acp_base + ACP_CLKMUX_SEL); + rpl_acp_writel(0x00, acp_base + ACP_CONTROL); + return 0; +} + +static int snd_rpl_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + struct rpl_dev_data *adata; + u32 addr; + int ret; + + /* RPL device check */ + switch (pci->revision) { + case 0x62: + 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 ACP6x audio"); + if (ret < 0) { + dev_err(&pci->dev, "pci_request_regions failed\n"); + goto disable_pci; + } + + adata = devm_kzalloc(&pci->dev, sizeof(struct rpl_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 = rpl_init(adata->acp6x_base); + if (ret) + goto release_regions; + 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; +release_regions: + pci_release_regions(pci); +disable_pci: + pci_disable_device(pci); + + return ret; +} + +static int __maybe_unused snd_rpl_suspend(struct device *dev) +{ + struct rpl_dev_data *adata; + int ret; + + adata = dev_get_drvdata(dev); + ret = rpl_deinit(adata->acp6x_base); + if (ret) + dev_err(dev, "ACP de-init failed\n"); + return ret; +} + +static int __maybe_unused snd_rpl_resume(struct device *dev) +{ + struct rpl_dev_data *adata; + int ret; + + adata = dev_get_drvdata(dev); + ret = rpl_init(adata->acp6x_base); + if (ret) + dev_err(dev, "ACP init failed\n"); + return ret; +} + +static const struct dev_pm_ops rpl_pm = { + SET_RUNTIME_PM_OPS(snd_rpl_suspend, snd_rpl_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(snd_rpl_suspend, snd_rpl_resume) +}; + +static void snd_rpl_remove(struct pci_dev *pci) +{ + struct rpl_dev_data *adata; + int ret; + + adata = pci_get_drvdata(pci); + ret = rpl_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_rpl_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_rpl_ids); + +static struct pci_driver rpl_acp6x_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_rpl_ids, + .probe = snd_rpl_probe, + .remove = snd_rpl_remove, + .driver = { + .pm = &rpl_pm, + } +}; + +module_pci_driver(rpl_acp6x_driver); + +MODULE_DESCRIPTION("AMD ACP RPL PCI driver"); +MODULE_LICENSE("GPL v2"); |