99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* soc-intel-quirks.h - prototypes for quirk autodetection
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*
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* Copyright (c) 2019, Intel Corporation.
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*
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*/
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#ifndef _SND_SOC_INTEL_QUIRKS_H
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#define _SND_SOC_INTEL_QUIRKS_H
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#include <linux/platform_data/x86/soc.h>
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#if IS_ENABLED(CONFIG_X86)
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#include <linux/dmi.h>
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#include <asm/iosf_mbi.h>
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static inline bool soc_intel_is_byt_cr(struct platform_device *pdev)
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{
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/*
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* List of systems which:
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* 1. Use a non CR version of the Bay Trail SoC
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* 2. Contain at least 6 interrupt resources so that the
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* platform_get_resource(pdev, IORESOURCE_IRQ, 5) check below
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* succeeds
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* 3. Despite 1. and 2. still have their IPC IRQ at index 0 rather then 5
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*
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* This needs to be here so that it can be shared between the SST and
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* SOF drivers. We rely on the compiler to optimize this out in files
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* where soc_intel_is_byt_cr is not used.
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*/
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static const struct dmi_system_id force_bytcr_table[] = {
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{ /* Lenovo Yoga Tablet 2 series */
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_FAMILY, "YOGATablet2"),
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},
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},
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{}
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};
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struct device *dev = &pdev->dev;
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int status = 0;
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if (!soc_intel_is_byt())
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return false;
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if (dmi_check_system(force_bytcr_table))
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return true;
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if (iosf_mbi_available()) {
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u32 bios_status;
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status = iosf_mbi_read(BT_MBI_UNIT_PMC, /* 0x04 PUNIT */
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MBI_REG_READ, /* 0x10 */
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0x006, /* BIOS_CONFIG */
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&bios_status);
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if (status) {
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dev_err(dev, "could not read PUNIT BIOS_CONFIG\n");
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} else {
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/* bits 26:27 mirror PMIC options */
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bios_status = (bios_status >> 26) & 3;
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if (bios_status == 1 || bios_status == 3) {
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dev_info(dev, "Detected Baytrail-CR platform\n");
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return true;
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}
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dev_info(dev, "BYT-CR not detected\n");
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}
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} else {
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dev_info(dev, "IOSF_MBI not available, no BYT-CR detection\n");
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}
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if (!platform_get_resource(pdev, IORESOURCE_IRQ, 5)) {
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/*
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* Some devices detected as BYT-T have only a single IRQ listed,
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* causing platform_get_irq with index 5 to return -ENXIO.
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* The correct IRQ in this case is at index 0, as on BYT-CR.
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*/
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dev_info(dev, "Falling back to Baytrail-CR platform\n");
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return true;
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}
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return false;
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}
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#else
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static inline bool soc_intel_is_byt_cr(struct platform_device *pdev)
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{
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return false;
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}
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#endif
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#endif /* _SND_SOC_INTEL_QUIRKS_H */
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