/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called COPYING. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *****************************************************************************/ #include #include #include #include #include "iwl-trans.h" #include "iwl-csr.h" #include "mvm.h" #include "iwl-eeprom-parse.h" #include "iwl-eeprom-read.h" #include "iwl-nvm-parse.h" #include "iwl-prph.h" /* Default NVM size to read */ #define IWL_NVM_DEFAULT_CHUNK_SIZE (2*1024) #define IWL_MAX_NVM_SECTION_SIZE 0x1b58 #define IWL_MAX_NVM_8000_SECTION_SIZE 0x1ffc #define NVM_WRITE_OPCODE 1 #define NVM_READ_OPCODE 0 /* load nvm chunk response */ enum { READ_NVM_CHUNK_SUCCEED = 0, READ_NVM_CHUNK_NOT_VALID_ADDRESS = 1 }; /* * prepare the NVM host command w/ the pointers to the nvm buffer * and send it to fw */ static int iwl_nvm_write_chunk(struct iwl_mvm *mvm, u16 section, u16 offset, u16 length, const u8 *data) { struct iwl_nvm_access_cmd nvm_access_cmd = { .offset = cpu_to_le16(offset), .length = cpu_to_le16(length), .type = cpu_to_le16(section), .op_code = NVM_WRITE_OPCODE, }; struct iwl_host_cmd cmd = { .id = NVM_ACCESS_CMD, .len = { sizeof(struct iwl_nvm_access_cmd), length }, .flags = CMD_SEND_IN_RFKILL, .data = { &nvm_access_cmd, data }, /* data may come from vmalloc, so use _DUP */ .dataflags = { 0, IWL_HCMD_DFL_DUP }, }; return iwl_mvm_send_cmd(mvm, &cmd); } static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section, u16 offset, u16 length, u8 *data) { struct iwl_nvm_access_cmd nvm_access_cmd = { .offset = cpu_to_le16(offset), .length = cpu_to_le16(length), .type = cpu_to_le16(section), .op_code = NVM_READ_OPCODE, }; struct iwl_nvm_access_resp *nvm_resp; struct iwl_rx_packet *pkt; struct iwl_host_cmd cmd = { .id = NVM_ACCESS_CMD, .flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL, .data = { &nvm_access_cmd, }, }; int ret, bytes_read, offset_read; u8 *resp_data; cmd.len[0] = sizeof(struct iwl_nvm_access_cmd); ret = iwl_mvm_send_cmd(mvm, &cmd); if (ret) return ret; pkt = cmd.resp_pkt; /* Extract NVM response */ nvm_resp = (void *)pkt->data; ret = le16_to_cpu(nvm_resp->status); bytes_read = le16_to_cpu(nvm_resp->length); offset_read = le16_to_cpu(nvm_resp->offset); resp_data = nvm_resp->data; if (ret) { if ((offset != 0) && (ret == READ_NVM_CHUNK_NOT_VALID_ADDRESS)) { /* * meaning of NOT_VALID_ADDRESS: * driver try to read chunk from address that is * multiple of 2K and got an error since addr is empty. * meaning of (offset != 0): driver already * read valid data from another chunk so this case * is not an error. */ IWL_DEBUG_EEPROM(mvm->trans->dev, "NVM access command failed on offset 0x%x since that section size is multiple 2K\n", offset); ret = 0; } else { IWL_DEBUG_EEPROM(mvm->trans->dev, "NVM access command failed with status %d (device: %s)\n", ret, mvm->cfg->name); ret = -EIO; } goto exit; } if (offset_read != offset) { IWL_ERR(mvm, "NVM ACCESS response with invalid offset %d\n", offset_read); ret = -EINVAL; goto exit; } /* Write data to NVM */ memcpy(data + offset, resp_data, bytes_read); ret = bytes_read; exit: iwl_free_resp(&cmd); return ret; } static int iwl_nvm_write_section(struct iwl_mvm *mvm, u16 section, const u8 *data, u16 length) { int offset = 0; /* copy data in chunks of 2k (and remainder if any) */ while (offset < length) { int chunk_size, ret; chunk_size = min(IWL_NVM_DEFAULT_CHUNK_SIZE, length - offset); ret = iwl_nvm_write_chunk(mvm, section, offset, chunk_size, data + offset); if (ret < 0) return ret; offset += chunk_size; } return 0; } /* * Reads an NVM section completely. * NICs prior to 7000 family doesn't have a real NVM, but just read * section 0 which is the EEPROM. Because the EEPROM reading is unlimited * by uCode, we need to manually check in this case that we don't * overflow and try to read more than the EEPROM size. * For 7000 family NICs, we supply the maximal size we can read, and * the uCode fills the response with as much data as we can, * without overflowing, so no check is needed. */ static int iwl_nvm_read_section(struct iwl_mvm *mvm, u16 section, u8 *data, u32 size_read) { u16 length, offset = 0; int ret; /* Set nvm section read length */ length = IWL_NVM_DEFAULT_CHUNK_SIZE; ret = length; /* Read the NVM until exhausted (reading less than requested) */ while (ret == length) { /* Check no memory assumptions fail and cause an overflow */ if ((size_read + offset + length) > mvm->cfg->base_params->eeprom_size) { IWL_ERR(mvm, "EEPROM size is too small for NVM\n"); return -ENOBUFS; } ret = iwl_nvm_read_chunk(mvm, section, offset, length, data); if (ret < 0) { IWL_DEBUG_EEPROM(mvm->trans->dev, "Cannot read NVM from section %d offset %d, length %d\n", section, offset, length); return ret; } offset += ret; } IWL_DEBUG_EEPROM(mvm->trans->dev, "NVM section %d read completed\n", section); return offset; } static struct iwl_nvm_data * iwl_parse_nvm_sections(struct iwl_mvm *mvm) { struct iwl_nvm_section *sections = mvm->nvm_sections; const __le16 *hw, *sw, *calib, *regulatory, *mac_override, *phy_sku; bool lar_enabled; u32 mac_addr0, mac_addr1; /* Checking for required sections */ if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) { if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data || !mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data) { IWL_ERR(mvm, "Can't parse empty OTP/NVM sections\n"); return NULL; } } else { /* SW and REGULATORY sections are mandatory */ if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data || !mvm->nvm_sections[NVM_SECTION_TYPE_REGULATORY].data) { IWL_ERR(mvm, "Can't parse empty family 8000 OTP/NVM sections\n"); return NULL; } /* MAC_OVERRIDE or at least HW section must exist */ if (!mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data && !mvm->nvm_sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data) { IWL_ERR(mvm, "Can't parse mac_address, empty sections\n"); return NULL; } /* PHY_SKU section is mandatory in B0 */ if (!mvm->nvm_sections[NVM_SECTION_TYPE_PHY_SKU].data) { IWL_ERR(mvm, "Can't parse phy_sku in B0, empty sections\n"); return NULL; } } if (WARN_ON(!mvm->cfg)) return NULL; /* read the mac address from WFMP registers */ mac_addr0 = iwl_trans_read_prph(mvm->trans, WFMP_MAC_ADDR_0); mac_addr1 = iwl_trans_read_prph(mvm->trans, WFMP_MAC_ADDR_1); hw = (const __le16 *)sections[mvm->cfg->nvm_hw_section_num].data; sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data; calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data; regulatory = (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY].data; mac_override = (const __le16 *)sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data; phy_sku = (const __le16 *)sections[NVM_SECTION_TYPE_PHY_SKU].data; lar_enabled = !iwlwifi_mod_params.lar_disable && fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_LAR_SUPPORT); return iwl_parse_nvm_data(mvm->trans->dev, mvm->cfg, hw, sw, calib, regulatory, mac_override, phy_sku, mvm->fw->valid_tx_ant, mvm->fw->valid_rx_ant, lar_enabled, mac_addr0, mac_addr1, mvm->trans->hw_id); } #define MAX_NVM_FILE_LEN 16384 /* * Reads external NVM from a file into mvm->nvm_sections * * HOW TO CREATE THE NVM FILE FORMAT: * ------------------------------ * 1. create hex file, format: * 3800 -> header * 0000 -> header * 5a40 -> data * * rev - 6 bit (word1) * len - 10 bit (word1) * id - 4 bit (word2) * rsv - 12 bit (word2) * * 2. flip 8bits with 8 bits per line to get the right NVM file format * * 3. create binary file from the hex file * * 4. save as "iNVM_xxx.bin" under /lib/firmware */ static int iwl_mvm_read_external_nvm(struct iwl_mvm *mvm) { int ret, section_size; u16 section_id; const struct firmware *fw_entry; const struct { __le16 word1; __le16 word2; u8 data[]; } *file_sec; const u8 *eof, *temp; int max_section_size; const __le32 *dword_buff; #define NVM_WORD1_LEN(x) (8 * (x & 0x03FF)) #define NVM_WORD2_ID(x) (x >> 12) #define NVM_WORD2_LEN_FAMILY_8000(x) (2 * ((x & 0xFF) << 8 | x >> 8)) #define NVM_WORD1_ID_FAMILY_8000(x) (x >> 4) #define NVM_HEADER_0 (0x2A504C54) #define NVM_HEADER_1 (0x4E564D2A) #define NVM_HEADER_SIZE (4 * sizeof(u32)) IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from external NVM\n"); /* Maximal size depends on HW family and step */ if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) max_section_size = IWL_MAX_NVM_SECTION_SIZE; else max_section_size = IWL_MAX_NVM_8000_SECTION_SIZE; /* * Obtain NVM image via request_firmware. Since we already used * request_firmware_nowait() for the firmware binary load and only * get here after that we assume the NVM request can be satisfied * synchronously. */ ret = request_firmware(&fw_entry, mvm->nvm_file_name, mvm->trans->dev); if (ret) { IWL_ERR(mvm, "ERROR: %s isn't available %d\n", mvm->nvm_file_name, ret); return ret; } IWL_INFO(mvm, "Loaded NVM file %s (%zu bytes)\n", mvm->nvm_file_name, fw_entry->size); if (fw_entry->size > MAX_NVM_FILE_LEN) { IWL_ERR(mvm, "NVM file too large\n"); ret = -EINVAL; goto out; } eof = fw_entry->data + fw_entry->size; dword_buff = (__le32 *)fw_entry->data; /* some NVM file will contain a header. * The header is identified by 2 dwords header as follow: * dword[0] = 0x2A504C54 * dword[1] = 0x4E564D2A * * This header must be skipped when providing the NVM data to the FW. */ if (fw_entry->size > NVM_HEADER_SIZE && dword_buff[0] == cpu_to_le32(NVM_HEADER_0) && dword_buff[1] == cpu_to_le32(NVM_HEADER_1)) { file_sec = (void *)(fw_entry->data + NVM_HEADER_SIZE); IWL_INFO(mvm, "NVM Version %08X\n", le32_to_cpu(dword_buff[2])); IWL_INFO(mvm, "NVM Manufacturing date %08X\n", le32_to_cpu(dword_buff[3])); /* nvm file validation, dword_buff[2] holds the file version */ if ((CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_C_STEP && le32_to_cpu(dword_buff[2]) < 0xE4A) || (CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP && le32_to_cpu(dword_buff[2]) >= 0xE4A)) { ret = -EFAULT; goto out; } } else { file_sec = (void *)fw_entry->data; } while (true) { if (file_sec->data > eof) { IWL_ERR(mvm, "ERROR - NVM file too short for section header\n"); ret = -EINVAL; break; } /* check for EOF marker */ if (!file_sec->word1 && !file_sec->word2) { ret = 0; break; } if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) { section_size = 2 * NVM_WORD1_LEN(le16_to_cpu(file_sec->word1)); section_id = NVM_WORD2_ID(le16_to_cpu(file_sec->word2)); } else { section_size = 2 * NVM_WORD2_LEN_FAMILY_8000( le16_to_cpu(file_sec->word2)); section_id = NVM_WORD1_ID_FAMILY_8000( le16_to_cpu(file_sec->word1)); } if (section_size > max_section_size) { IWL_ERR(mvm, "ERROR - section too large (%d)\n", section_size); ret = -EINVAL; break; } if (!section_size) { IWL_ERR(mvm, "ERROR - section empty\n"); ret = -EINVAL; break; } if (file_sec->data + section_size > eof) { IWL_ERR(mvm, "ERROR - NVM file too short for section (%d bytes)\n", section_size); ret = -EINVAL; break; } if (WARN(section_id >= NVM_MAX_NUM_SECTIONS, "Invalid NVM section ID %d\n", section_id)) { ret = -EINVAL; break; } temp = kmemdup(file_sec->data, section_size, GFP_KERNEL); if (!temp) { ret = -ENOMEM; break; } kfree(mvm->nvm_sections[section_id].data); mvm->nvm_sections[section_id].data = temp; mvm->nvm_sections[section_id].length = section_size; /* advance to the next section */ file_sec = (void *)(file_sec->data + section_size); } out: release_firmware(fw_entry); return ret; } /* Loads the NVM data stored in mvm->nvm_sections into the NIC */ int iwl_mvm_load_nvm_to_nic(struct iwl_mvm *mvm) { int i, ret = 0; struct iwl_nvm_section *sections = mvm->nvm_sections; IWL_DEBUG_EEPROM(mvm->trans->dev, "'Write to NVM\n"); for (i = 0; i < ARRAY_SIZE(mvm->nvm_sections); i++) { if (!mvm->nvm_sections[i].data || !mvm->nvm_sections[i].length) continue; ret = iwl_nvm_write_section(mvm, i, sections[i].data, sections[i].length); if (ret < 0) { IWL_ERR(mvm, "iwl_mvm_send_cmd failed: %d\n", ret); break; } } return ret; } int iwl_nvm_init(struct iwl_mvm *mvm, bool read_nvm_from_nic) { int ret, section; u32 size_read = 0; u8 *nvm_buffer, *temp; const char *nvm_file_B = mvm->cfg->default_nvm_file_B_step; const char *nvm_file_C = mvm->cfg->default_nvm_file_C_step; if (WARN_ON_ONCE(mvm->cfg->nvm_hw_section_num >= NVM_MAX_NUM_SECTIONS)) return -EINVAL; /* load NVM values from nic */ if (read_nvm_from_nic) { /* Read From FW NVM */ IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from NVM\n"); nvm_buffer = kmalloc(mvm->cfg->base_params->eeprom_size, GFP_KERNEL); if (!nvm_buffer) return -ENOMEM; for (section = 0; section < NVM_MAX_NUM_SECTIONS; section++) { /* we override the constness for initial read */ ret = iwl_nvm_read_section(mvm, section, nvm_buffer, size_read); if (ret < 0) continue; size_read += ret; temp = kmemdup(nvm_buffer, ret, GFP_KERNEL); if (!temp) { ret = -ENOMEM; break; } mvm->nvm_sections[section].data = temp; mvm->nvm_sections[section].length = ret; #ifdef CONFIG_IWLWIFI_DEBUGFS switch (section) { case NVM_SECTION_TYPE_SW: mvm->nvm_sw_blob.data = temp; mvm->nvm_sw_blob.size = ret; break; case NVM_SECTION_TYPE_CALIBRATION: mvm->nvm_calib_blob.data = temp; mvm->nvm_calib_blob.size = ret; break; case NVM_SECTION_TYPE_PRODUCTION: mvm->nvm_prod_blob.data = temp; mvm->nvm_prod_blob.size = ret; break; case NVM_SECTION_TYPE_PHY_SKU: mvm->nvm_phy_sku_blob.data = temp; mvm->nvm_phy_sku_blob.size = ret; break; default: if (section == mvm->cfg->nvm_hw_section_num) { mvm->nvm_hw_blob.data = temp; mvm->nvm_hw_blob.size = ret; break; } } #endif } if (!size_read) IWL_ERR(mvm, "OTP is blank\n"); kfree(nvm_buffer); } /* Only if PNVM selected in the mod param - load external NVM */ if (mvm->nvm_file_name) { /* read External NVM file from the mod param */ ret = iwl_mvm_read_external_nvm(mvm); if (ret) { /* choose the nvm_file name according to the * HW step */ if (CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) mvm->nvm_file_name = nvm_file_B; else mvm->nvm_file_name = nvm_file_C; if (ret == -EFAULT && mvm->nvm_file_name) { /* in case nvm file was failed try again */ ret = iwl_mvm_read_external_nvm(mvm); if (ret) return ret; } else { return ret; } } } /* parse the relevant nvm sections */ mvm->nvm_data = iwl_parse_nvm_sections(mvm); if (!mvm->nvm_data) return -ENODATA; IWL_DEBUG_EEPROM(mvm->trans->dev, "nvm version = %x\n", mvm->nvm_data->nvm_version); return 0; } struct iwl_mcc_update_resp * iwl_mvm_update_mcc(struct iwl_mvm *mvm, const char *alpha2, enum iwl_mcc_source src_id) { struct iwl_mcc_update_cmd mcc_update_cmd = { .mcc = cpu_to_le16(alpha2[0] << 8 | alpha2[1]), .source_id = (u8)src_id, }; struct iwl_mcc_update_resp *mcc_resp, *resp_cp = NULL; struct iwl_rx_packet *pkt; struct iwl_host_cmd cmd = { .id = MCC_UPDATE_CMD, .flags = CMD_WANT_SKB, .data = { &mcc_update_cmd }, }; int ret; u32 status; int resp_len, n_channels; u16 mcc; if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm))) return ERR_PTR(-EOPNOTSUPP); cmd.len[0] = sizeof(struct iwl_mcc_update_cmd); IWL_DEBUG_LAR(mvm, "send MCC update to FW with '%c%c' src = %d\n", alpha2[0], alpha2[1], src_id); ret = iwl_mvm_send_cmd(mvm, &cmd); if (ret) return ERR_PTR(ret); pkt = cmd.resp_pkt; /* Extract MCC response */ mcc_resp = (void *)pkt->data; status = le32_to_cpu(mcc_resp->status); mcc = le16_to_cpu(mcc_resp->mcc); /* W/A for a FW/NVM issue - returns 0x00 for the world domain */ if (mcc == 0) { mcc = 0x3030; /* "00" - world */ mcc_resp->mcc = cpu_to_le16(mcc); } n_channels = __le32_to_cpu(mcc_resp->n_channels); IWL_DEBUG_LAR(mvm, "MCC response status: 0x%x. new MCC: 0x%x ('%c%c') n_chans: %d\n", status, mcc, mcc >> 8, mcc & 0xff, n_channels); resp_len = sizeof(*mcc_resp) + n_channels * sizeof(__le32); resp_cp = kmemdup(mcc_resp, resp_len, GFP_KERNEL); if (!resp_cp) { ret = -ENOMEM; goto exit; } ret = 0; exit: iwl_free_resp(&cmd); if (ret) return ERR_PTR(ret); return resp_cp; } #ifdef CONFIG_ACPI #define WRD_METHOD "WRDD" #define WRDD_WIFI (0x07) #define WRDD_WIGIG (0x10) static u32 iwl_mvm_wrdd_get_mcc(struct iwl_mvm *mvm, 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_LAR(mvm, "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 == WRDD_WIFI) break; mcc_pkg = NULL; } if (mcc_pkg) { mcc_value = &mcc_pkg->package.elements[1]; return mcc_value->integer.value; } return 0; } static int iwl_mvm_get_bios_mcc(struct iwl_mvm *mvm, char *mcc) { acpi_handle root_handle; acpi_handle handle; struct acpi_buffer wrdd = {ACPI_ALLOCATE_BUFFER, NULL}; acpi_status status; u32 mcc_val; struct pci_dev *pdev = to_pci_dev(mvm->dev); root_handle = ACPI_HANDLE(&pdev->dev); if (!root_handle) { IWL_DEBUG_LAR(mvm, "Could not retrieve root port ACPI handle\n"); return -ENOENT; } /* Get the method's handle */ status = acpi_get_handle(root_handle, (acpi_string)WRD_METHOD, &handle); if (ACPI_FAILURE(status)) { IWL_DEBUG_LAR(mvm, "WRD method not found\n"); return -ENOENT; } /* Call WRDD with no arguments */ status = acpi_evaluate_object(handle, NULL, NULL, &wrdd); if (ACPI_FAILURE(status)) { IWL_DEBUG_LAR(mvm, "WRDC invocation failed (0x%x)\n", status); return -ENOENT; } mcc_val = iwl_mvm_wrdd_get_mcc(mvm, wrdd.pointer); kfree(wrdd.pointer); if (!mcc_val) return -ENOENT; mcc[0] = (mcc_val >> 8) & 0xff; mcc[1] = mcc_val & 0xff; mcc[2] = '\0'; return 0; } #else /* CONFIG_ACPI */ static int iwl_mvm_get_bios_mcc(struct iwl_mvm *mvm, char *mcc) { return -ENOENT; } #endif int iwl_mvm_init_mcc(struct iwl_mvm *mvm) { bool tlv_lar; bool nvm_lar; int retval; struct ieee80211_regdomain *regd; char mcc[3]; if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000) { tlv_lar = fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_LAR_SUPPORT); nvm_lar = mvm->nvm_data->lar_enabled; if (tlv_lar != nvm_lar) IWL_INFO(mvm, "Conflict between TLV & NVM regarding enabling LAR (TLV = %s NVM =%s)\n", tlv_lar ? "enabled" : "disabled", nvm_lar ? "enabled" : "disabled"); } if (!iwl_mvm_is_lar_supported(mvm)) return 0; /* * try to replay the last set MCC to FW. If it doesn't exist, * queue an update to cfg80211 to retrieve the default alpha2 from FW. */ retval = iwl_mvm_init_fw_regd(mvm); if (retval != -ENOENT) return retval; /* * Driver regulatory hint for initial update, this also informs the * firmware we support wifi location updates. * Disallow scans that might crash the FW while the LAR regdomain * is not set. */ mvm->lar_regdom_set = false; regd = iwl_mvm_get_current_regdomain(mvm, NULL); if (IS_ERR_OR_NULL(regd)) return -EIO; if (iwl_mvm_is_wifi_mcc_supported(mvm) && !iwl_mvm_get_bios_mcc(mvm, mcc)) { kfree(regd); regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc, MCC_SOURCE_BIOS, NULL); if (IS_ERR_OR_NULL(regd)) return -EIO; } retval = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd); kfree(regd); return retval; } void iwl_mvm_rx_chub_update_mcc(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_mcc_chub_notif *notif = (void *)pkt->data; enum iwl_mcc_source src; char mcc[3]; struct ieee80211_regdomain *regd; lockdep_assert_held(&mvm->mutex); if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm))) return; mcc[0] = notif->mcc >> 8; mcc[1] = notif->mcc & 0xff; mcc[2] = '\0'; src = notif->source_id; IWL_DEBUG_LAR(mvm, "RX: received chub update mcc cmd (mcc '%s' src %d)\n", mcc, src); regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc, src, NULL); if (IS_ERR_OR_NULL(regd)) return; regulatory_set_wiphy_regd(mvm->hw->wiphy, regd); kfree(regd); }