| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // AMD Vangogh ACP PCI Driver |
| // |
| // Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved. |
| |
| #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 <linux/pm_runtime.h> |
| |
| #include "acp5x.h" |
| |
| struct acp5x_dev_data { |
| void __iomem *acp5x_base; |
| bool acp5x_audio_mode; |
| struct resource *res; |
| struct platform_device *pdev[ACP5x_DEVS]; |
| }; |
| |
| static int acp5x_power_on(void __iomem *acp5x_base) |
| { |
| u32 val; |
| int timeout; |
| |
| val = acp_readl(acp5x_base + ACP_PGFSM_STATUS); |
| |
| if (val == 0) |
| return val; |
| |
| if ((val & ACP_PGFSM_STATUS_MASK) != |
| ACP_POWER_ON_IN_PROGRESS) |
| acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, |
| acp5x_base + ACP_PGFSM_CONTROL); |
| timeout = 0; |
| while (++timeout < 500) { |
| val = acp_readl(acp5x_base + ACP_PGFSM_STATUS); |
| if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON) |
| return 0; |
| udelay(1); |
| } |
| return -ETIMEDOUT; |
| } |
| |
| static int acp5x_reset(void __iomem *acp5x_base) |
| { |
| u32 val; |
| int timeout; |
| |
| acp_writel(1, acp5x_base + ACP_SOFT_RESET); |
| timeout = 0; |
| while (++timeout < 500) { |
| val = acp_readl(acp5x_base + ACP_SOFT_RESET); |
| if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) |
| break; |
| cpu_relax(); |
| } |
| acp_writel(0, acp5x_base + ACP_SOFT_RESET); |
| timeout = 0; |
| while (++timeout < 500) { |
| val = acp_readl(acp5x_base + ACP_SOFT_RESET); |
| if (!val) |
| return 0; |
| cpu_relax(); |
| } |
| return -ETIMEDOUT; |
| } |
| |
| static void acp5x_enable_interrupts(void __iomem *acp5x_base) |
| { |
| acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB); |
| } |
| |
| static void acp5x_disable_interrupts(void __iomem *acp5x_base) |
| { |
| acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base + |
| ACP_EXTERNAL_INTR_STAT); |
| acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL); |
| acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB); |
| } |
| |
| static int acp5x_init(void __iomem *acp5x_base) |
| { |
| int ret; |
| |
| /* power on */ |
| ret = acp5x_power_on(acp5x_base); |
| if (ret) { |
| pr_err("ACP5x power on failed\n"); |
| return ret; |
| } |
| acp_writel(0x01, acp5x_base + ACP_CONTROL); |
| /* Reset */ |
| ret = acp5x_reset(acp5x_base); |
| if (ret) { |
| pr_err("ACP5x reset failed\n"); |
| return ret; |
| } |
| acp_writel(0x03, acp5x_base + ACP_CLKMUX_SEL); |
| acp5x_enable_interrupts(acp5x_base); |
| return 0; |
| } |
| |
| static int acp5x_deinit(void __iomem *acp5x_base) |
| { |
| int ret; |
| |
| acp5x_disable_interrupts(acp5x_base); |
| /* Reset */ |
| ret = acp5x_reset(acp5x_base); |
| if (ret) { |
| pr_err("ACP5x reset failed\n"); |
| return ret; |
| } |
| acp_writel(0x00, acp5x_base + ACP_CLKMUX_SEL); |
| acp_writel(0x00, acp5x_base + ACP_CONTROL); |
| return 0; |
| } |
| |
| static int snd_acp5x_probe(struct pci_dev *pci, |
| const struct pci_device_id *pci_id) |
| { |
| struct acp5x_dev_data *adata; |
| struct platform_device_info pdevinfo[ACP5x_DEVS]; |
| unsigned int irqflags; |
| int ret, i; |
| u32 addr, val; |
| |
| irqflags = IRQF_SHARED; |
| if (pci->revision != 0x50) |
| return -ENODEV; |
| |
| if (pci_enable_device(pci)) { |
| dev_err(&pci->dev, "pci_enable_device failed\n"); |
| return -ENODEV; |
| } |
| |
| ret = pci_request_regions(pci, "AMD ACP5x audio"); |
| if (ret < 0) { |
| dev_err(&pci->dev, "pci_request_regions failed\n"); |
| goto disable_pci; |
| } |
| |
| adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data), |
| GFP_KERNEL); |
| if (!adata) { |
| ret = -ENOMEM; |
| goto release_regions; |
| } |
| addr = pci_resource_start(pci, 0); |
| adata->acp5x_base = devm_ioremap(&pci->dev, addr, |
| pci_resource_len(pci, 0)); |
| if (!adata->acp5x_base) { |
| ret = -ENOMEM; |
| goto release_regions; |
| } |
| pci_set_master(pci); |
| pci_set_drvdata(pci, adata); |
| ret = acp5x_init(adata->acp5x_base); |
| if (ret) |
| goto release_regions; |
| |
| val = acp_readl(adata->acp5x_base + ACP_PIN_CONFIG); |
| switch (val) { |
| case I2S_MODE: |
| adata->res = devm_kzalloc(&pci->dev, |
| sizeof(struct resource) * ACP5x_RES, |
| GFP_KERNEL); |
| if (!adata->res) { |
| ret = -ENOMEM; |
| goto de_init; |
| } |
| |
| adata->res[0].name = "acp5x_i2s_iomem"; |
| adata->res[0].flags = IORESOURCE_MEM; |
| adata->res[0].start = addr; |
| adata->res[0].end = addr + (ACP5x_REG_END - ACP5x_REG_START); |
| |
| adata->res[1].name = "acp5x_i2s_sp"; |
| adata->res[1].flags = IORESOURCE_MEM; |
| adata->res[1].start = addr + ACP5x_I2STDM_REG_START; |
| adata->res[1].end = addr + ACP5x_I2STDM_REG_END; |
| |
| adata->res[2].name = "acp5x_i2s_hs"; |
| adata->res[2].flags = IORESOURCE_MEM; |
| adata->res[2].start = addr + ACP5x_HS_TDM_REG_START; |
| adata->res[2].end = addr + ACP5x_HS_TDM_REG_END; |
| |
| adata->res[3].name = "acp5x_i2s_irq"; |
| adata->res[3].flags = IORESOURCE_IRQ; |
| adata->res[3].start = pci->irq; |
| adata->res[3].end = adata->res[3].start; |
| |
| adata->acp5x_audio_mode = ACP5x_I2S_MODE; |
| |
| memset(&pdevinfo, 0, sizeof(pdevinfo)); |
| pdevinfo[0].name = "acp5x_i2s_dma"; |
| pdevinfo[0].id = 0; |
| pdevinfo[0].parent = &pci->dev; |
| pdevinfo[0].num_res = 4; |
| pdevinfo[0].res = &adata->res[0]; |
| pdevinfo[0].data = &irqflags; |
| pdevinfo[0].size_data = sizeof(irqflags); |
| |
| pdevinfo[1].name = "acp5x_i2s_playcap"; |
| pdevinfo[1].id = 0; |
| pdevinfo[1].parent = &pci->dev; |
| pdevinfo[1].num_res = 1; |
| pdevinfo[1].res = &adata->res[1]; |
| |
| pdevinfo[2].name = "acp5x_i2s_playcap"; |
| pdevinfo[2].id = 1; |
| pdevinfo[2].parent = &pci->dev; |
| pdevinfo[2].num_res = 1; |
| pdevinfo[2].res = &adata->res[2]; |
| |
| pdevinfo[3].name = "acp5x_mach"; |
| pdevinfo[3].id = 0; |
| pdevinfo[3].parent = &pci->dev; |
| for (i = 0; i < ACP5x_DEVS; i++) { |
| adata->pdev[i] = |
| platform_device_register_full(&pdevinfo[i]); |
| if (IS_ERR(adata->pdev[i])) { |
| dev_err(&pci->dev, "cannot register %s device\n", |
| pdevinfo[i].name); |
| ret = PTR_ERR(adata->pdev[i]); |
| goto unregister_devs; |
| } |
| } |
| break; |
| default: |
| dev_info(&pci->dev, "ACP audio mode : %d\n", val); |
| } |
| pm_runtime_set_autosuspend_delay(&pci->dev, 2000); |
| pm_runtime_use_autosuspend(&pci->dev); |
| pm_runtime_put_noidle(&pci->dev); |
| pm_runtime_allow(&pci->dev); |
| return 0; |
| |
| unregister_devs: |
| for (--i; i >= 0; i--) |
| platform_device_unregister(adata->pdev[i]); |
| de_init: |
| if (acp5x_deinit(adata->acp5x_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_acp5x_suspend(struct device *dev) |
| { |
| int ret; |
| struct acp5x_dev_data *adata; |
| |
| adata = dev_get_drvdata(dev); |
| ret = acp5x_deinit(adata->acp5x_base); |
| if (ret) |
| dev_err(dev, "ACP de-init failed\n"); |
| else |
| dev_dbg(dev, "ACP de-initialized\n"); |
| |
| return ret; |
| } |
| |
| static int __maybe_unused snd_acp5x_resume(struct device *dev) |
| { |
| int ret; |
| struct acp5x_dev_data *adata; |
| |
| adata = dev_get_drvdata(dev); |
| ret = acp5x_init(adata->acp5x_base); |
| if (ret) { |
| dev_err(dev, "ACP init failed\n"); |
| return ret; |
| } |
| return 0; |
| } |
| |
| static const struct dev_pm_ops acp5x_pm = { |
| SET_RUNTIME_PM_OPS(snd_acp5x_suspend, |
| snd_acp5x_resume, NULL) |
| SET_SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume) |
| }; |
| |
| static void snd_acp5x_remove(struct pci_dev *pci) |
| { |
| struct acp5x_dev_data *adata; |
| int i, ret; |
| |
| adata = pci_get_drvdata(pci); |
| if (adata->acp5x_audio_mode == ACP5x_I2S_MODE) { |
| for (i = 0; i < ACP5x_DEVS; i++) |
| platform_device_unregister(adata->pdev[i]); |
| } |
| ret = acp5x_deinit(adata->acp5x_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_acp5x_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_acp5x_ids); |
| |
| static struct pci_driver acp5x_driver = { |
| .name = KBUILD_MODNAME, |
| .id_table = snd_acp5x_ids, |
| .probe = snd_acp5x_probe, |
| .remove = snd_acp5x_remove, |
| .driver = { |
| .pm = &acp5x_pm, |
| } |
| }; |
| |
| module_pci_driver(acp5x_driver); |
| |
| MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); |
| MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver"); |
| MODULE_LICENSE("GPL v2"); |