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427 lines
9.7 KiB
427 lines
9.7 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// AMD Renoir ACP PCI Driver |
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// |
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//Copyright 2020 Advanced Micro Devices, Inc. |
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#include <linux/pci.h> |
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#include <linux/acpi.h> |
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#include <linux/dmi.h> |
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#include <linux/module.h> |
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#include <linux/io.h> |
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#include <linux/delay.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 "rn_acp3x.h" |
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static int acp_power_gating; |
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module_param(acp_power_gating, int, 0644); |
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MODULE_PARM_DESC(acp_power_gating, "Enable acp power gating"); |
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/** |
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* dmic_acpi_check = -1 - Use ACPI/DMI method to detect the DMIC hardware presence at runtime |
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* = 0 - Skip the DMIC device creation and return probe failure |
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* = 1 - Force DMIC support |
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*/ |
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static int dmic_acpi_check = ACP_DMIC_AUTO; |
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module_param(dmic_acpi_check, bint, 0644); |
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MODULE_PARM_DESC(dmic_acpi_check, "Digital microphone presence (-1=auto, 0=none, 1=force)"); |
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struct acp_dev_data { |
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void __iomem *acp_base; |
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struct resource *res; |
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struct platform_device *pdev[ACP_DEVS]; |
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}; |
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static int rn_acp_power_on(void __iomem *acp_base) |
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{ |
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u32 val; |
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int timeout; |
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val = rn_readl(acp_base + ACP_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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rn_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, |
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acp_base + ACP_PGFSM_CONTROL); |
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timeout = 0; |
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while (++timeout < 500) { |
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val = rn_readl(acp_base + ACP_PGFSM_STATUS); |
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if (!val) |
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return 0; |
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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 rn_acp_power_off(void __iomem *acp_base) |
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{ |
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u32 val; |
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int timeout; |
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rn_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK, |
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acp_base + ACP_PGFSM_CONTROL); |
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timeout = 0; |
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while (++timeout < 500) { |
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val = rn_readl(acp_base + ACP_PGFSM_STATUS); |
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if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF) |
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return 0; |
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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 rn_acp_reset(void __iomem *acp_base) |
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{ |
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u32 val; |
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int timeout; |
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rn_writel(1, acp_base + ACP_SOFT_RESET); |
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timeout = 0; |
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while (++timeout < 500) { |
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val = rn_readl(acp_base + ACP_SOFT_RESET); |
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if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) |
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break; |
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cpu_relax(); |
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} |
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rn_writel(0, acp_base + ACP_SOFT_RESET); |
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timeout = 0; |
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while (++timeout < 500) { |
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val = rn_readl(acp_base + ACP_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 void rn_acp_enable_interrupts(void __iomem *acp_base) |
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{ |
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u32 ext_intr_ctrl; |
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rn_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB); |
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ext_intr_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); |
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ext_intr_ctrl |= ACP_ERROR_MASK; |
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rn_writel(ext_intr_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); |
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} |
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static void rn_acp_disable_interrupts(void __iomem *acp_base) |
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{ |
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rn_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + |
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ACP_EXTERNAL_INTR_STAT); |
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rn_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB); |
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} |
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static int rn_acp_init(void __iomem *acp_base) |
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{ |
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int ret; |
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/* power on */ |
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ret = rn_acp_power_on(acp_base); |
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if (ret) { |
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pr_err("ACP power on failed\n"); |
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return ret; |
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} |
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rn_writel(0x01, acp_base + ACP_CONTROL); |
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/* Reset */ |
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ret = rn_acp_reset(acp_base); |
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if (ret) { |
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pr_err("ACP reset failed\n"); |
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return ret; |
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} |
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rn_writel(0x03, acp_base + ACP_CLKMUX_SEL); |
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rn_acp_enable_interrupts(acp_base); |
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return 0; |
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} |
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static int rn_acp_deinit(void __iomem *acp_base) |
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{ |
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int ret; |
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rn_acp_disable_interrupts(acp_base); |
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/* Reset */ |
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ret = rn_acp_reset(acp_base); |
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if (ret) { |
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pr_err("ACP reset failed\n"); |
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return ret; |
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} |
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rn_writel(0x00, acp_base + ACP_CLKMUX_SEL); |
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rn_writel(0x00, acp_base + ACP_CONTROL); |
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/* power off */ |
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if (acp_power_gating) { |
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ret = rn_acp_power_off(acp_base); |
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if (ret) { |
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pr_err("ACP power off failed\n"); |
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return ret; |
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} |
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} |
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return 0; |
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} |
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static const struct dmi_system_id rn_acp_quirk_table[] = { |
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{ |
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/* Lenovo IdeaPad S340-14API */ |
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.matches = { |
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DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), |
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DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81NB"), |
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} |
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}, |
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{ |
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/* Lenovo IdeaPad Flex 5 14ARE05 */ |
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.matches = { |
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DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), |
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DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81X2"), |
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} |
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}, |
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{ |
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/* Lenovo IdeaPad 5 15ARE05 */ |
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.matches = { |
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DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), |
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DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81YQ"), |
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} |
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}, |
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{ |
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/* Lenovo ThinkPad E14 Gen 2 */ |
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.matches = { |
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DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), |
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DMI_EXACT_MATCH(DMI_BOARD_NAME, "20T6CTO1WW"), |
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} |
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}, |
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{ |
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/* Lenovo ThinkPad X395 */ |
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.matches = { |
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DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"), |
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DMI_EXACT_MATCH(DMI_BOARD_NAME, "20NLCTO1WW"), |
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} |
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}, |
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{} |
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}; |
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static int snd_rn_acp_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 acp_dev_data *adata; |
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struct platform_device_info pdevinfo[ACP_DEVS]; |
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#if defined(CONFIG_ACPI) |
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acpi_handle handle; |
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acpi_integer dmic_status; |
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#endif |
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const struct dmi_system_id *dmi_id; |
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unsigned int irqflags; |
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int ret, index; |
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u32 addr; |
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/* Renoir device check */ |
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if (pci->revision != 0x01) |
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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 acp_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->acp_base = devm_ioremap(&pci->dev, addr, |
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pci_resource_len(pci, 0)); |
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if (!adata->acp_base) { |
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ret = -ENOMEM; |
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goto disable_msi; |
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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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ret = rn_acp_init(adata->acp_base); |
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if (ret) |
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goto disable_msi; |
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if (!dmic_acpi_check) { |
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ret = -ENODEV; |
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goto de_init; |
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} else if (dmic_acpi_check == ACP_DMIC_AUTO) { |
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#if defined(CONFIG_ACPI) |
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handle = ACPI_HANDLE(&pci->dev); |
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ret = acpi_evaluate_integer(handle, "_WOV", NULL, &dmic_status); |
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if (ACPI_FAILURE(ret)) { |
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ret = -ENODEV; |
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goto de_init; |
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} |
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if (!dmic_status) { |
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ret = -ENODEV; |
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goto de_init; |
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} |
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#endif |
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dmi_id = dmi_first_match(rn_acp_quirk_table); |
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if (dmi_id && !dmi_id->driver_data) { |
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dev_info(&pci->dev, "ACPI settings override using DMI (ACP mic is not present)"); |
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ret = -ENODEV; |
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goto de_init; |
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} |
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} |
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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 de_init; |
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} |
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adata->res[0].name = "acp_pdm_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 + (ACP_REG_END - ACP_REG_START); |
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adata->res[1].name = "acp_pdm_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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memset(&pdevinfo, 0, sizeof(pdevinfo)); |
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pdevinfo[0].name = "acp_rn_pdm_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 = 2; |
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pdevinfo[0].res = adata->res; |
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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 = "dmic-codec"; |
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pdevinfo[1].id = 0; |
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pdevinfo[1].parent = &pci->dev; |
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pdevinfo[2].name = "acp_pdm_mach"; |
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pdevinfo[2].id = 0; |
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pdevinfo[2].parent = &pci->dev; |
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for (index = 0; index < ACP_DEVS; index++) { |
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adata->pdev[index] = |
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platform_device_register_full(&pdevinfo[index]); |
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if (IS_ERR(adata->pdev[index])) { |
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dev_err(&pci->dev, "cannot register %s device\n", |
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pdevinfo[index].name); |
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ret = PTR_ERR(adata->pdev[index]); |
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goto unregister_devs; |
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} |
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} |
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pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS); |
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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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for (index = 0; index < ACP_DEVS; index++) |
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platform_device_unregister(adata->pdev[index]); |
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de_init: |
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if (rn_acp_deinit(adata->acp_base)) |
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dev_err(&pci->dev, "ACP de-init failed\n"); |
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disable_msi: |
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pci_disable_msi(pci); |
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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_rn_acp_suspend(struct device *dev) |
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{ |
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int ret; |
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struct acp_dev_data *adata; |
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adata = dev_get_drvdata(dev); |
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ret = rn_acp_deinit(adata->acp_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 ret; |
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} |
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static int snd_rn_acp_resume(struct device *dev) |
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{ |
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int ret; |
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struct acp_dev_data *adata; |
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adata = dev_get_drvdata(dev); |
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ret = rn_acp_init(adata->acp_base); |
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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 rn_acp_pm = { |
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.runtime_suspend = snd_rn_acp_suspend, |
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.runtime_resume = snd_rn_acp_resume, |
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.suspend = snd_rn_acp_suspend, |
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.resume = snd_rn_acp_resume, |
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}; |
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static void snd_rn_acp_remove(struct pci_dev *pci) |
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{ |
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struct acp_dev_data *adata; |
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int ret, index; |
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adata = pci_get_drvdata(pci); |
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for (index = 0; index < ACP_DEVS; index++) |
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platform_device_unregister(adata->pdev[index]); |
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ret = rn_acp_deinit(adata->acp_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_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_rn_acp_ids[] = { |
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID), |
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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_rn_acp_ids); |
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static struct pci_driver rn_acp_driver = { |
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.name = KBUILD_MODNAME, |
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.id_table = snd_rn_acp_ids, |
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.probe = snd_rn_acp_probe, |
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.remove = snd_rn_acp_remove, |
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.driver = { |
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.pm = &rn_acp_pm, |
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} |
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}; |
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module_pci_driver(rn_acp_driver); |
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MODULE_AUTHOR("[email protected]"); |
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MODULE_DESCRIPTION("AMD ACP Renoir PCI driver"); |
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MODULE_LICENSE("GPL v2");
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