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Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/nvm.c')
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/nvm.c238
1 files changed, 238 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/nvm.c b/drivers/net/wireless/iwlwifi/mvm/nvm.c
new file mode 100644
index 0000000..b8ec02f
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/mvm/nvm.c
@@ -0,0 +1,238 @@
+/******************************************************************************
+ *
+ * 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 - 2013 Intel Corporation. All rights reserved.
+ *
+ * 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 <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
+ * 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 "iwl-trans.h"
+#include "mvm.h"
+#include "iwl-eeprom-parse.h"
+#include "iwl-eeprom-read.h"
+#include "iwl-nvm-parse.h"
+
+/* list of NVM sections we are allowed/need to read */
+static const int nvm_to_read[] = {
+ NVM_SECTION_TYPE_HW,
+ NVM_SECTION_TYPE_SW,
+ NVM_SECTION_TYPE_CALIBRATION,
+ NVM_SECTION_TYPE_PRODUCTION,
+};
+
+/* Default NVM size to read */
+#define IWL_NVM_DEFAULT_CHUNK_SIZE (2*1024);
+
+static inline void iwl_nvm_fill_read(struct iwl_nvm_access_cmd *cmd,
+ u16 offset, u16 length, u16 section)
+{
+ cmd->offset = cpu_to_le16(offset);
+ cmd->length = cpu_to_le16(length);
+ cmd->type = cpu_to_le16(section);
+}
+
+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 = {};
+ struct iwl_nvm_access_resp *nvm_resp;
+ struct iwl_rx_packet *pkt;
+ struct iwl_host_cmd cmd = {
+ .id = NVM_ACCESS_CMD,
+ .flags = CMD_SYNC | CMD_WANT_SKB,
+ .data = { &nvm_access_cmd, },
+ };
+ int ret, bytes_read, offset_read;
+ u8 *resp_data;
+
+ iwl_nvm_fill_read(&nvm_access_cmd, offset, length, section);
+ cmd.len[0] = sizeof(struct iwl_nvm_access_cmd);
+
+ ret = iwl_mvm_send_cmd(mvm, &cmd);
+ if (ret)
+ return ret;
+
+ pkt = cmd.resp_pkt;
+ if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
+ IWL_ERR(mvm, "Bad return from NVM_ACCES_COMMAND (0x%08X)\n",
+ pkt->hdr.flags);
+ ret = -EIO;
+ goto exit;
+ }
+
+ /* 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) {
+ IWL_ERR(mvm,
+ "NVM access command failed with status %d (device: %s)\n",
+ ret, mvm->cfg->name);
+ ret = -EINVAL;
+ 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;
+}
+
+/*
+ * 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)
+{
+ 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) {
+ ret = iwl_nvm_read_chunk(mvm, section, offset, length, data);
+ if (ret < 0) {
+ IWL_ERR(mvm,
+ "Cannot read NVM from section %d offset %d, length %d\n",
+ section, offset, length);
+ return ret;
+ }
+ offset += ret;
+ }
+
+ IWL_INFO(mvm, "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;
+
+ /* Checking for required sections */
+ if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
+ !mvm->nvm_sections[NVM_SECTION_TYPE_HW].data) {
+ IWL_ERR(mvm, "Can't parse empty NVM sections\n");
+ return NULL;
+ }
+
+ if (WARN_ON(!mvm->cfg))
+ return NULL;
+
+ hw = (const __le16 *)sections[NVM_SECTION_TYPE_HW].data;
+ sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data;
+ calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data;
+ return iwl_parse_nvm_data(mvm->trans->dev, mvm->cfg, hw, sw, calib);
+}
+
+int iwl_nvm_init(struct iwl_mvm *mvm)
+{
+ int ret, i, section;
+ u8 *nvm_buffer, *temp;
+
+ /* TODO: find correct NVM max size for a section */
+ nvm_buffer = kmalloc(mvm->cfg->base_params->eeprom_size,
+ GFP_KERNEL);
+ if (!nvm_buffer)
+ return -ENOMEM;
+ for (i = 0; i < ARRAY_SIZE(nvm_to_read); i++) {
+ section = nvm_to_read[i];
+ /* we override the constness for initial read */
+ ret = iwl_nvm_read_section(mvm, section, nvm_buffer);
+ if (ret < 0)
+ break;
+ temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
+ if (!temp) {
+ ret = -ENOMEM;
+ break;
+ }
+ mvm->nvm_sections[section].data = temp;
+ mvm->nvm_sections[section].length = ret;
+ }
+ kfree(nvm_buffer);
+ if (ret < 0)
+ return ret;
+
+ ret = 0;
+ mvm->nvm_data = iwl_parse_nvm_sections(mvm);
+
+ return ret;
+}