This overrides whatever regulatory the device EEPROM contains and uses what the platform says instead - in this implementation the ACPI driver.
In case the hint is not programmed or corrupted (0xffff) the device falls back to the eeprom programmed settings. Signed-off-by: Bartosz Markowski <[email protected]> --- drivers/net/wireless/ath/ath10k/core.h | 1 + drivers/net/wireless/ath/ath10k/mac.c | 117 +++++++++++++++++++++++++++++++++ drivers/net/wireless/ath/ath10k/wmi.c | 2 +- 3 files changed, 119 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h index 30ae5bf81611..1df7c600a2bb 100644 --- a/drivers/net/wireless/ath/ath10k/core.h +++ b/drivers/net/wireless/ath/ath10k/core.h @@ -692,6 +692,7 @@ struct ath10k { u32 phy_capability; u32 hw_min_tx_power; u32 hw_max_tx_power; + u32 hw_eeprom_rd; u32 ht_cap_info; u32 vht_cap_info; u32 num_rf_chains; diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index fb8e38df9446..b6b8a0b2046b 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -19,6 +19,7 @@ #include <net/mac80211.h> #include <linux/etherdevice.h> +#include <linux/acpi.h> #include "hif.h" #include "core.h" @@ -7751,6 +7752,116 @@ struct ath10k_vif *ath10k_get_arvif(struct ath10k *ar, u32 vdev_id) return arvif_iter.arvif; } +#ifdef CONFIG_ACPI +#define WRD_METHOD "WRDD" +#define WRDD_WIFI (0x07) + +static u32 ath10k_mac_wrdd_get_mcc(struct ath10k *ar, union acpi_object *wrdd) +{ + union acpi_object *mcc_pkg; + union acpi_object *domain_type; + union acpi_object *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) { + ath10k_warn(ar, "ignoring malformed/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) + continue; + if (mcc_pkg->package.count < 2) + continue; + if (mcc_pkg->package.elements[0].type != ACPI_TYPE_INTEGER || + mcc_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) + continue; + + domain_type = &mcc_pkg->package.elements[0]; + if (domain_type->integer.value != WRDD_WIFI) + continue; + + mcc_value = &mcc_pkg->package.elements[1]; + return mcc_value->integer.value; + } + return 0; +} + +static u16 ath10k_mac_get_wrdd_regulatory(struct ath10k *ar) +{ + u16 rd; + acpi_handle root_handle; + acpi_handle handle; + struct acpi_buffer wrdd = {ACPI_ALLOCATE_BUFFER, NULL}; + acpi_status status; + u32 alpha2_code; + char alpha2[3]; + struct pci_dev *pdev = to_pci_dev(ar->dev); + + root_handle = ACPI_HANDLE(&pdev->dev); + if (!root_handle) { + ath10k_warn(ar, "failed to get root port acpi handle\n"); + return -1; + } + + status = acpi_get_handle(root_handle, (acpi_string)WRD_METHOD, &handle); + if (ACPI_FAILURE(status)) { + ath10k_warn(ar, "failed to get wrd method %d\n", status); + return -1; + } + + status = acpi_evaluate_object(handle, NULL, NULL, &wrdd); + if (ACPI_FAILURE(status)) { + ath10k_warn(ar, "failed to call wrdc %d\n", status); + return -1; + } + + alpha2_code = ath10k_mac_wrdd_get_mcc(ar, wrdd.pointer); + kfree(wrdd.pointer); + if (!alpha2_code) + return -1; + + alpha2[0] = (alpha2_code >> 8) & 0xff; + alpha2[1] = (alpha2_code >> 0) & 0xff; + alpha2[2] = '\0'; + + ath10k_info(ar, "regulatory hint from WRDD (alpha2-code): %s\n", alpha2); + + rd = ath_regd_find_country_by_name(alpha2); + if (rd == 0xffff) + return rd; + + rd |= COUNTRY_ERD_FLAG; + return rd; +} + +#else +static u16 ath10k_mac_get_wrdd_regulatory(struct ath10k *ar) +{ + /* fallback to default eeprom settings */ + return -1; +} +#endif + +static int ath10k_mac_init_rd(struct ath10k *ar) +{ + u16 rd; + + rd = ath10k_mac_get_wrdd_regulatory(ar); + if (rd == 0xffff) { + ath10k_info(ar, "fallback to eeprom programmed regulatory settings\n"); + rd = ar->hw_eeprom_rd; + } + + ar->ath_common.regulatory.current_rd = rd; + return 0; +} + int ath10k_mac_register(struct ath10k *ar) { static const u32 cipher_suites[] = { @@ -7974,6 +8085,12 @@ int ath10k_mac_register(struct ath10k *ar) ar->running_fw->fw_file.fw_features)) ar->ops->wake_tx_queue = NULL; + ret = ath10k_mac_init_rd(ar); + if (ret) { + ath10k_err(ar, "failed to derive regdom: %d\n", ret); + goto err_dfs_detector_exit; + } + ret = ath_regd_init(&ar->ath_common.regulatory, ar->hw->wiphy, ath10k_reg_notifier); if (ret) { diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c index 169cd2e783eb..e9aadc85ad1b 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -4635,7 +4635,7 @@ static void ath10k_wmi_event_service_ready_work(struct work_struct *work) ar->fw_version_build = (__le32_to_cpu(arg.sw_ver1) & 0x0000ffff); ar->phy_capability = __le32_to_cpu(arg.phy_capab); ar->num_rf_chains = __le32_to_cpu(arg.num_rf_chains); - ar->ath_common.regulatory.current_rd = __le32_to_cpu(arg.eeprom_rd); + ar->hw_eeprom_rd = __le32_to_cpu(arg.eeprom_rd); ath10k_dbg_dump(ar, ATH10K_DBG_WMI, NULL, "wmi svc: ", arg.service_map, arg.service_map_len); -- 2.1.2 _______________________________________________ ath10k mailing list [email protected] http://lists.infradead.org/mailman/listinfo/ath10k
