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iwlwifi: acpi: make iwl_get_bios_mcc() use the common acpi functions

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The way iwl_get_bios_mcc() gets the WiFi package and checks for its
integrity is almost identical to the new iwl_acpi_get_wifi_pkg()
function.  Instead of having duplicate code, convert it to use the
common code.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Luca Coelho 2017-09-26 15:33:56 +03:00
parent 45a5c6f68b
commit ed1a962db7
3 changed files with 20 additions and 54 deletions
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1
drivers/net/wireless/intel/iwlwifi/fw/acpi.h
View File

@ -85,6 +85,7 @@
#define ACPI_EWRD_WIFI_DATA_SIZE ((ACPI_SAR_PROFILE_NUM - 1) * \
ACPI_SAR_TABLE_SIZE + 3)
#define ACPI_WGDS_WIFI_DATA_SIZE 18
#define ACPI_WRDD_WIFI_DATA_SIZE 2
#define ACPI_SPLC_WIFI_DATA_SIZE 2
#define ACPI_WGDS_NUM_BANDS 2

66
drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
View File

@ -945,64 +945,36 @@ iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
}
IWL_EXPORT_SYMBOL(iwl_parse_nvm_mcc_info);
#ifdef CONFIG_ACPI
static u32 iwl_wrdd_get_mcc(struct device *dev, union acpi_object *wrdd)
{
union acpi_object *mcc_pkg, *domain_type, *mcc_value;
u32 i;
if (wrdd->type != ACPI_TYPE_PACKAGE ||
wrdd->package.count < 2 ||
wrdd->package.elements[0].type != ACPI_TYPE_INTEGER ||
wrdd->package.elements[0].integer.value != 0) {
IWL_DEBUG_EEPROM(dev, "Unsupported wrdd structure\n");
return 0;
}
for (i = 1 ; i < wrdd->package.count ; ++i) {
mcc_pkg = &wrdd->package.elements[i];
if (mcc_pkg->type != ACPI_TYPE_PACKAGE ||
mcc_pkg->package.count < 2 ||
mcc_pkg->package.elements[0].type != ACPI_TYPE_INTEGER ||
mcc_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) {
mcc_pkg = NULL;
continue;
}
domain_type = &mcc_pkg->package.elements[0];
if (domain_type->integer.value == ACPI_WIFI_DOMAIN)
break;
mcc_pkg = NULL;
}
if (mcc_pkg) {
mcc_value = &mcc_pkg->package.elements[1];
return mcc_value->integer.value;
}
return 0;
}
int iwl_get_bios_mcc(struct device *dev, char *mcc)
{
union acpi_object *data;
union acpi_object *wifi_pkg, *data;
u32 mcc_val;
int ret;
data = iwl_acpi_get_object(dev, ACPI_WRDD_METHOD);
if (IS_ERR(data))
return PTR_ERR(data);
mcc_val = iwl_wrdd_get_mcc(dev, data);
kfree(data);
if (!mcc_val)
return -ENOENT;
wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_WRDD_WIFI_DATA_SIZE);
if (IS_ERR(wifi_pkg)) {
ret = PTR_ERR(wifi_pkg);
goto out_free;
}
if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) {
ret = -EINVAL;
goto out_free;
}
mcc_val = wifi_pkg->package.elements[1].integer.value;
mcc[0] = (mcc_val >> 8) & 0xff;
mcc[1] = mcc_val & 0xff;
mcc[2] = '\0';
return 0;
ret = 0;
out_free:
kfree(data);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_get_bios_mcc);
#endif

7
drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.h
View File

@ -109,7 +109,6 @@ struct ieee80211_regdomain *
iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
int num_of_ch, __le32 *channels, u16 fw_mcc);
#ifdef CONFIG_ACPI
/**
* iwl_get_bios_mcc - read MCC from BIOS, if available
*
@ -119,11 +118,5 @@ iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
* This function tries to read the current MCC from ACPI if available.
*/
int iwl_get_bios_mcc(struct device *dev, char *mcc);
#else
static inline int iwl_get_bios_mcc(struct device *dev, char *mcc)
{
return -ENOENT;
}
#endif
#endif /* __iwl_nvm_parse_h__ */