diff options
Diffstat (limited to 'sound/soc/codecs/cs-amp-lib.c')
| -rw-r--r-- | sound/soc/codecs/cs-amp-lib.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/sound/soc/codecs/cs-amp-lib.c b/sound/soc/codecs/cs-amp-lib.c index b1530e7c75e8..9b51d056d863 100644 --- a/sound/soc/codecs/cs-amp-lib.c +++ b/sound/soc/codecs/cs-amp-lib.c @@ -20,6 +20,14 @@ #define CIRRUS_LOGIC_CALIBRATION_EFI_GUID \ EFI_GUID(0x02f9af02, 0x7734, 0x4233, 0xb4, 0x3d, 0x93, 0xfe, 0x5a, 0xa3, 0x5d, 0xb3) +#define LENOVO_SPEAKER_ID_EFI_NAME L"SdwSpeaker" +#define LENOVO_SPEAKER_ID_EFI_GUID \ + EFI_GUID(0x48df970e, 0xe27f, 0x460a, 0xb5, 0x86, 0x77, 0x19, 0x80, 0x1d, 0x92, 0x82) + +#define HP_SPEAKER_ID_EFI_NAME L"HPSpeakerID" +#define HP_SPEAKER_ID_EFI_GUID \ + EFI_GUID(0xc49593a4, 0xd099, 0x419b, 0xa2, 0xc3, 0x67, 0xe9, 0x80, 0xe6, 0x1d, 0x1e) + static int cs_amp_write_cal_coeff(struct cs_dsp *dsp, const struct cirrus_amp_cal_controls *controls, const char *ctl_name, u32 val) @@ -114,6 +122,24 @@ static efi_status_t cs_amp_get_efi_variable(efi_char16_t *name, return EFI_NOT_FOUND; } +static int cs_amp_convert_efi_status(efi_status_t status) +{ + switch (status) { + case EFI_SUCCESS: + return 0; + case EFI_NOT_FOUND: + return -ENOENT; + case EFI_BUFFER_TOO_SMALL: + return -EFBIG; + case EFI_UNSUPPORTED: + case EFI_ACCESS_DENIED: + case EFI_SECURITY_VIOLATION: + return -EACCES; + default: + return -EIO; + } +} + static struct cirrus_amp_efi_data *cs_amp_get_cal_efi_buffer(struct device *dev) { struct cirrus_amp_efi_data *efi_data; @@ -276,6 +302,81 @@ int cs_amp_get_efi_calibration_data(struct device *dev, u64 target_uid, int amp_ } EXPORT_SYMBOL_NS_GPL(cs_amp_get_efi_calibration_data, "SND_SOC_CS_AMP_LIB"); +struct cs_amp_spkid_efi { + efi_char16_t *name; + efi_guid_t *guid; + u8 values[2]; +}; + +static int cs_amp_get_efi_byte_spkid(struct device *dev, const struct cs_amp_spkid_efi *info) +{ + efi_status_t status; + unsigned long size; + u8 spkid; + int i, ret; + + size = sizeof(spkid); + status = cs_amp_get_efi_variable(info->name, info->guid, &size, &spkid); + ret = cs_amp_convert_efi_status(status); + if (ret < 0) + return ret; + + if (size == 0) + return -ENOENT; + + for (i = 0; i < ARRAY_SIZE(info->values); i++) { + if (info->values[i] == spkid) + return i; + } + + dev_err(dev, "EFI speaker ID bad value %#x\n", spkid); + + return -EINVAL; +} + +static const struct cs_amp_spkid_efi cs_amp_spkid_byte_types[] = { + { + .name = LENOVO_SPEAKER_ID_EFI_NAME, + .guid = &LENOVO_SPEAKER_ID_EFI_GUID, + .values = { 0xd0, 0xd1 }, + }, + { + .name = HP_SPEAKER_ID_EFI_NAME, + .guid = &HP_SPEAKER_ID_EFI_GUID, + .values = { 0x30, 0x31 }, + }, +}; + +/** + * cs_amp_get_vendor_spkid - get a speaker ID from vendor-specific storage + * @dev: pointer to struct device + * + * Known vendor-specific methods of speaker ID are checked and if one is + * found its speaker ID value is returned. + * + * Return: >=0 is a valid speaker ID. -ENOENT if a vendor-specific method + * was not found. -EACCES if the vendor-specific storage could not + * be read. Other error values indicate that the data from the + * vendor-specific storage was found but could not be understood. + */ +int cs_amp_get_vendor_spkid(struct device *dev) +{ + int i, ret; + + if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE) && + !IS_ENABLED(CONFIG_SND_SOC_CS_AMP_LIB_TEST)) + return -ENOENT; + + for (i = 0; i < ARRAY_SIZE(cs_amp_spkid_byte_types); i++) { + ret = cs_amp_get_efi_byte_spkid(dev, &cs_amp_spkid_byte_types[i]); + if (ret != -ENOENT) + return ret; + } + + return -ENOENT; +} +EXPORT_SYMBOL_NS_GPL(cs_amp_get_vendor_spkid, "SND_SOC_CS_AMP_LIB"); + static const struct cs_amp_test_hooks cs_amp_test_hook_ptrs = { .get_efi_variable = cs_amp_get_efi_variable, .write_cal_coeff = cs_amp_write_cal_coeff, |