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332 lines
7.5 KiB
332 lines
7.5 KiB
// 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 <linux/pm_runtime.h> |
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#include <linux/delay.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[ACP3x_DEVS]; |
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u32 pme_en; |
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}; |
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static int acp3x_power_on(struct acp3x_dev_data *adata) |
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{ |
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void __iomem *acp3x_base = adata->acp3x_base; |
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u32 val; |
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int timeout; |
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val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS); |
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if (val == 0) |
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return val; |
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if (!((val & ACP_PGFSM_STATUS_MASK) == |
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ACP_POWER_ON_IN_PROGRESS)) |
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rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, |
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acp3x_base + mmACP_PGFSM_CONTROL); |
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timeout = 0; |
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while (++timeout < 500) { |
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val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS); |
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if (!val) { |
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/* ACP power On clears PME_EN. |
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* Restore the value to its prior state |
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*/ |
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rv_writel(adata->pme_en, acp3x_base + mmACP_PME_EN); |
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return 0; |
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} |
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udelay(1); |
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} |
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return -ETIMEDOUT; |
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} |
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static int acp3x_reset(void __iomem *acp3x_base) |
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{ |
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u32 val; |
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int timeout; |
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rv_writel(1, acp3x_base + mmACP_SOFT_RESET); |
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timeout = 0; |
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while (++timeout < 500) { |
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val = rv_readl(acp3x_base + mmACP_SOFT_RESET); |
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if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) |
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break; |
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cpu_relax(); |
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} |
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rv_writel(0, acp3x_base + mmACP_SOFT_RESET); |
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timeout = 0; |
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while (++timeout < 500) { |
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val = rv_readl(acp3x_base + mmACP_SOFT_RESET); |
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if (!val) |
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return 0; |
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cpu_relax(); |
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} |
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return -ETIMEDOUT; |
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} |
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static int acp3x_init(struct acp3x_dev_data *adata) |
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{ |
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void __iomem *acp3x_base = adata->acp3x_base; |
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int ret; |
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/* power on */ |
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ret = acp3x_power_on(adata); |
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if (ret) { |
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pr_err("ACP3x power on failed\n"); |
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return ret; |
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} |
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/* Reset */ |
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ret = acp3x_reset(acp3x_base); |
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if (ret) { |
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pr_err("ACP3x reset failed\n"); |
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return ret; |
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} |
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return 0; |
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} |
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static int acp3x_deinit(void __iomem *acp3x_base) |
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{ |
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int ret; |
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/* Reset */ |
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ret = acp3x_reset(acp3x_base); |
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if (ret) { |
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pr_err("ACP3x reset failed\n"); |
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return ret; |
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} |
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return 0; |
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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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struct acp3x_dev_data *adata; |
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struct platform_device_info pdevinfo[ACP3x_DEVS]; |
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unsigned int irqflags; |
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int ret, i; |
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u32 addr, val; |
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/* Raven device detection */ |
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if (pci->revision != 0x00) |
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return -ENODEV; |
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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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irqflags = IRQF_SHARED; |
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addr = pci_resource_start(pci, 0); |
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adata->acp3x_base = devm_ioremap(&pci->dev, addr, |
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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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/* Save ACP_PME_EN state */ |
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adata->pme_en = rv_readl(adata->acp3x_base + mmACP_PME_EN); |
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ret = acp3x_init(adata); |
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if (ret) |
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goto release_regions; |
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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) * 4, |
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GFP_KERNEL); |
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if (!adata->res) { |
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ret = -ENOMEM; |
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goto de_init; |
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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_sp"; |
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adata->res[1].flags = IORESOURCE_MEM; |
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adata->res[1].start = addr + ACP3x_I2STDM_REG_START; |
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adata->res[1].end = addr + ACP3x_I2STDM_REG_END; |
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adata->res[2].name = "acp3x_i2s_bt"; |
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adata->res[2].flags = IORESOURCE_MEM; |
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adata->res[2].start = addr + ACP3x_BT_TDM_REG_START; |
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adata->res[2].end = addr + ACP3x_BT_TDM_REG_END; |
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adata->res[3].name = "acp3x_i2s_irq"; |
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adata->res[3].flags = IORESOURCE_IRQ; |
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adata->res[3].start = pci->irq; |
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adata->res[3].end = adata->res[3].start; |
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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[0].name = "acp3x_rv_i2s_dma"; |
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pdevinfo[0].id = 0; |
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pdevinfo[0].parent = &pci->dev; |
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pdevinfo[0].num_res = 4; |
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pdevinfo[0].res = &adata->res[0]; |
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pdevinfo[0].data = &irqflags; |
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pdevinfo[0].size_data = sizeof(irqflags); |
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pdevinfo[1].name = "acp3x_i2s_playcap"; |
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pdevinfo[1].id = 0; |
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pdevinfo[1].parent = &pci->dev; |
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pdevinfo[1].num_res = 1; |
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pdevinfo[1].res = &adata->res[1]; |
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pdevinfo[2].name = "acp3x_i2s_playcap"; |
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pdevinfo[2].id = 1; |
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pdevinfo[2].parent = &pci->dev; |
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pdevinfo[2].num_res = 1; |
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pdevinfo[2].res = &adata->res[1]; |
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pdevinfo[3].name = "acp3x_i2s_playcap"; |
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pdevinfo[3].id = 2; |
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pdevinfo[3].parent = &pci->dev; |
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pdevinfo[3].num_res = 1; |
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pdevinfo[3].res = &adata->res[2]; |
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for (i = 0; i < ACP3x_DEVS; i++) { |
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adata->pdev[i] = |
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platform_device_register_full(&pdevinfo[i]); |
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if (IS_ERR(adata->pdev[i])) { |
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dev_err(&pci->dev, "cannot register %s device\n", |
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pdevinfo[i].name); |
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ret = PTR_ERR(adata->pdev[i]); |
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goto unregister_devs; |
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} |
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} |
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break; |
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default: |
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dev_info(&pci->dev, "ACP audio mode : %d\n", val); |
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break; |
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} |
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pm_runtime_set_autosuspend_delay(&pci->dev, 2000); |
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pm_runtime_use_autosuspend(&pci->dev); |
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pm_runtime_put_noidle(&pci->dev); |
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pm_runtime_allow(&pci->dev); |
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return 0; |
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unregister_devs: |
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if (val == I2S_MODE) |
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for (i = 0; i < ACP3x_DEVS; i++) |
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platform_device_unregister(adata->pdev[i]); |
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de_init: |
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if (acp3x_deinit(adata->acp3x_base)) |
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dev_err(&pci->dev, "ACP de-init failed\n"); |
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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 int snd_acp3x_suspend(struct device *dev) |
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{ |
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int ret; |
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struct acp3x_dev_data *adata; |
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adata = dev_get_drvdata(dev); |
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ret = acp3x_deinit(adata->acp3x_base); |
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if (ret) |
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dev_err(dev, "ACP de-init failed\n"); |
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else |
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dev_dbg(dev, "ACP de-initialized\n"); |
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return 0; |
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} |
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static int snd_acp3x_resume(struct device *dev) |
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{ |
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int ret; |
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struct acp3x_dev_data *adata; |
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adata = dev_get_drvdata(dev); |
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ret = acp3x_init(adata); |
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if (ret) { |
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dev_err(dev, "ACP init failed\n"); |
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return ret; |
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} |
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return 0; |
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} |
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static const struct dev_pm_ops acp3x_pm = { |
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.runtime_suspend = snd_acp3x_suspend, |
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.runtime_resume = snd_acp3x_resume, |
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.resume = snd_acp3x_resume, |
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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; |
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int i, ret; |
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adata = pci_get_drvdata(pci); |
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if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) { |
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for (i = 0; i < ACP3x_DEVS; i++) |
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platform_device_unregister(adata->pdev[i]); |
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} |
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ret = acp3x_deinit(adata->acp3x_base); |
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if (ret) |
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dev_err(&pci->dev, "ACP de-init failed\n"); |
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pm_runtime_forbid(&pci->dev); |
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pm_runtime_get_noresume(&pci->dev); |
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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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.driver = { |
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.pm = &acp3x_pm, |
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} |
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}; |
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module_pci_driver(acp3x_driver); |
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MODULE_AUTHOR("[email protected]"); |
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MODULE_AUTHOR("[email protected]"); |
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MODULE_DESCRIPTION("AMD ACP3x PCI driver"); |
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MODULE_LICENSE("GPL v2");
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