157 lines
3.5 KiB
C
157 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// AMD ACP PCI Driver
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//
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//Copyright 2016 Advanced Micro Devices, Inc.
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#include <linux/pci.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include "acp3x.h"
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struct acp3x_dev_data {
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void __iomem *acp3x_base;
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bool acp3x_audio_mode;
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struct resource *res;
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struct platform_device *pdev;
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};
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static int snd_acp3x_probe(struct pci_dev *pci,
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const struct pci_device_id *pci_id)
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{
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int ret;
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u32 addr, val;
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struct acp3x_dev_data *adata;
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struct platform_device_info pdevinfo;
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unsigned int irqflags;
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if (pci_enable_device(pci)) {
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dev_err(&pci->dev, "pci_enable_device failed\n");
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return -ENODEV;
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}
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ret = pci_request_regions(pci, "AMD ACP3x audio");
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if (ret < 0) {
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dev_err(&pci->dev, "pci_request_regions failed\n");
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goto disable_pci;
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}
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adata = devm_kzalloc(&pci->dev, sizeof(struct acp3x_dev_data),
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GFP_KERNEL);
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if (!adata) {
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ret = -ENOMEM;
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goto release_regions;
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}
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/* check for msi interrupt support */
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ret = pci_enable_msi(pci);
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if (ret)
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/* msi is not enabled */
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irqflags = IRQF_SHARED;
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else
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/* msi is enabled */
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irqflags = 0;
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addr = pci_resource_start(pci, 0);
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adata->acp3x_base = ioremap(addr, pci_resource_len(pci, 0));
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if (!adata->acp3x_base) {
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ret = -ENOMEM;
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goto release_regions;
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}
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pci_set_master(pci);
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pci_set_drvdata(pci, adata);
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val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG);
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switch (val) {
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case I2S_MODE:
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adata->res = devm_kzalloc(&pci->dev,
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sizeof(struct resource) * 2,
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GFP_KERNEL);
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if (!adata->res) {
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ret = -ENOMEM;
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goto unmap_mmio;
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}
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adata->res[0].name = "acp3x_i2s_iomem";
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adata->res[0].flags = IORESOURCE_MEM;
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adata->res[0].start = addr;
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adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START);
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adata->res[1].name = "acp3x_i2s_irq";
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adata->res[1].flags = IORESOURCE_IRQ;
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adata->res[1].start = pci->irq;
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adata->res[1].end = pci->irq;
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adata->acp3x_audio_mode = ACP3x_I2S_MODE;
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memset(&pdevinfo, 0, sizeof(pdevinfo));
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pdevinfo.name = "acp3x_rv_i2s";
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pdevinfo.id = 0;
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pdevinfo.parent = &pci->dev;
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pdevinfo.num_res = 2;
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pdevinfo.res = adata->res;
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pdevinfo.data = &irqflags;
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pdevinfo.size_data = sizeof(irqflags);
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adata->pdev = platform_device_register_full(&pdevinfo);
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if (IS_ERR(adata->pdev)) {
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dev_err(&pci->dev, "cannot register %s device\n",
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pdevinfo.name);
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ret = PTR_ERR(adata->pdev);
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goto unmap_mmio;
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}
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break;
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default:
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dev_err(&pci->dev, "Invalid ACP audio mode : %d\n", val);
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ret = -ENODEV;
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goto unmap_mmio;
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}
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return 0;
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unmap_mmio:
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pci_disable_msi(pci);
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iounmap(adata->acp3x_base);
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release_regions:
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pci_release_regions(pci);
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disable_pci:
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pci_disable_device(pci);
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return ret;
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}
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static void snd_acp3x_remove(struct pci_dev *pci)
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{
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struct acp3x_dev_data *adata = pci_get_drvdata(pci);
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platform_device_unregister(adata->pdev);
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iounmap(adata->acp3x_base);
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pci_disable_msi(pci);
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pci_release_regions(pci);
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pci_disable_device(pci);
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}
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static const struct pci_device_id snd_acp3x_ids[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2),
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.class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
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.class_mask = 0xffffff },
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, snd_acp3x_ids);
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static struct pci_driver acp3x_driver = {
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.name = KBUILD_MODNAME,
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.id_table = snd_acp3x_ids,
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.probe = snd_acp3x_probe,
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.remove = snd_acp3x_remove,
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};
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module_pci_driver(acp3x_driver);
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MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
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MODULE_DESCRIPTION("AMD ACP3x PCI driver");
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MODULE_LICENSE("GPL v2");
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