diff options
Diffstat (limited to 'kernel/drivers/net/wireless/iwlwifi/iwl-phy-db.c')
| -rw-r--r-- | kernel/drivers/net/wireless/iwlwifi/iwl-phy-db.c | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/kernel/drivers/net/wireless/iwlwifi/iwl-phy-db.c b/kernel/drivers/net/wireless/iwlwifi/iwl-phy-db.c new file mode 100644 index 000000000..a105455b6 --- /dev/null +++ b/kernel/drivers/net/wireless/iwlwifi/iwl-phy-db.c @@ -0,0 +1,471 @@ +/****************************************************************************** + * + * 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) 2007 - 2014 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) 2005 - 2014 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 <linux/slab.h> +#include <linux/string.h> +#include <linux/export.h> + +#include "iwl-drv.h" +#include "iwl-phy-db.h" +#include "iwl-debug.h" +#include "iwl-op-mode.h" +#include "iwl-trans.h" + +#define CHANNEL_NUM_SIZE 4 /* num of channels in calib_ch size */ +#define IWL_NUM_PAPD_CH_GROUPS 9 +#define IWL_NUM_TXP_CH_GROUPS 9 + +struct iwl_phy_db_entry { + u16 size; + u8 *data; +}; + +/** + * struct iwl_phy_db - stores phy configuration and calibration data. + * + * @cfg: phy configuration. + * @calib_nch: non channel specific calibration data. + * @calib_ch: channel specific calibration data. + * @calib_ch_group_papd: calibration data related to papd channel group. + * @calib_ch_group_txp: calibration data related to tx power chanel group. + */ +struct iwl_phy_db { + struct iwl_phy_db_entry cfg; + struct iwl_phy_db_entry calib_nch; + struct iwl_phy_db_entry calib_ch_group_papd[IWL_NUM_PAPD_CH_GROUPS]; + struct iwl_phy_db_entry calib_ch_group_txp[IWL_NUM_TXP_CH_GROUPS]; + + struct iwl_trans *trans; +}; + +enum iwl_phy_db_section_type { + IWL_PHY_DB_CFG = 1, + IWL_PHY_DB_CALIB_NCH, + IWL_PHY_DB_UNUSED, + IWL_PHY_DB_CALIB_CHG_PAPD, + IWL_PHY_DB_CALIB_CHG_TXP, + IWL_PHY_DB_MAX +}; + +#define PHY_DB_CMD 0x6c /* TEMP API - The actual is 0x8c */ + +/* + * phy db - configure operational ucode + */ +struct iwl_phy_db_cmd { + __le16 type; + __le16 length; + u8 data[]; +} __packed; + +/* for parsing of tx power channel group data that comes from the firmware*/ +struct iwl_phy_db_chg_txp { + __le32 space; + __le16 max_channel_idx; +} __packed; + +/* + * phy db - Receive phy db chunk after calibrations + */ +struct iwl_calib_res_notif_phy_db { + __le16 type; + __le16 length; + u8 data[]; +} __packed; + +struct iwl_phy_db *iwl_phy_db_init(struct iwl_trans *trans) +{ + struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db), + GFP_KERNEL); + + if (!phy_db) + return phy_db; + + phy_db->trans = trans; + + /* TODO: add default values of the phy db. */ + return phy_db; +} +IWL_EXPORT_SYMBOL(iwl_phy_db_init); + +/* + * get phy db section: returns a pointer to a phy db section specified by + * type and channel group id. + */ +static struct iwl_phy_db_entry * +iwl_phy_db_get_section(struct iwl_phy_db *phy_db, + enum iwl_phy_db_section_type type, + u16 chg_id) +{ + if (!phy_db || type >= IWL_PHY_DB_MAX) + return NULL; + + switch (type) { + case IWL_PHY_DB_CFG: + return &phy_db->cfg; + case IWL_PHY_DB_CALIB_NCH: + return &phy_db->calib_nch; + case IWL_PHY_DB_CALIB_CHG_PAPD: + if (chg_id >= IWL_NUM_PAPD_CH_GROUPS) + return NULL; + return &phy_db->calib_ch_group_papd[chg_id]; + case IWL_PHY_DB_CALIB_CHG_TXP: + if (chg_id >= IWL_NUM_TXP_CH_GROUPS) + return NULL; + return &phy_db->calib_ch_group_txp[chg_id]; + default: + return NULL; + } + return NULL; +} + +static void iwl_phy_db_free_section(struct iwl_phy_db *phy_db, + enum iwl_phy_db_section_type type, + u16 chg_id) +{ + struct iwl_phy_db_entry *entry = + iwl_phy_db_get_section(phy_db, type, chg_id); + if (!entry) + return; + + kfree(entry->data); + entry->data = NULL; + entry->size = 0; +} + +void iwl_phy_db_free(struct iwl_phy_db *phy_db) +{ + int i; + + if (!phy_db) + return; + + iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CFG, 0); + iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_NCH, 0); + for (i = 0; i < IWL_NUM_PAPD_CH_GROUPS; i++) + iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_PAPD, i); + for (i = 0; i < IWL_NUM_TXP_CH_GROUPS; i++) + iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_TXP, i); + + kfree(phy_db); +} +IWL_EXPORT_SYMBOL(iwl_phy_db_free); + +int iwl_phy_db_set_section(struct iwl_phy_db *phy_db, struct iwl_rx_packet *pkt, + gfp_t alloc_ctx) +{ + struct iwl_calib_res_notif_phy_db *phy_db_notif = + (struct iwl_calib_res_notif_phy_db *)pkt->data; + enum iwl_phy_db_section_type type = le16_to_cpu(phy_db_notif->type); + u16 size = le16_to_cpu(phy_db_notif->length); + struct iwl_phy_db_entry *entry; + u16 chg_id = 0; + + if (!phy_db) + return -EINVAL; + + if (type == IWL_PHY_DB_CALIB_CHG_PAPD || + type == IWL_PHY_DB_CALIB_CHG_TXP) + chg_id = le16_to_cpup((__le16 *)phy_db_notif->data); + + entry = iwl_phy_db_get_section(phy_db, type, chg_id); + if (!entry) + return -EINVAL; + + kfree(entry->data); + entry->data = kmemdup(phy_db_notif->data, size, alloc_ctx); + if (!entry->data) { + entry->size = 0; + return -ENOMEM; + } + + entry->size = size; + + IWL_DEBUG_INFO(phy_db->trans, + "%s(%d): [PHYDB]SET: Type %d , Size: %d\n", + __func__, __LINE__, type, size); + + return 0; +} +IWL_EXPORT_SYMBOL(iwl_phy_db_set_section); + +static int is_valid_channel(u16 ch_id) +{ + if (ch_id <= 14 || + (36 <= ch_id && ch_id <= 64 && ch_id % 4 == 0) || + (100 <= ch_id && ch_id <= 140 && ch_id % 4 == 0) || + (145 <= ch_id && ch_id <= 165 && ch_id % 4 == 1)) + return 1; + return 0; +} + +static u8 ch_id_to_ch_index(u16 ch_id) +{ + if (WARN_ON(!is_valid_channel(ch_id))) + return 0xff; + + if (ch_id <= 14) + return ch_id - 1; + if (ch_id <= 64) + return (ch_id + 20) / 4; + if (ch_id <= 140) + return (ch_id - 12) / 4; + return (ch_id - 13) / 4; +} + + +static u16 channel_id_to_papd(u16 ch_id) +{ + if (WARN_ON(!is_valid_channel(ch_id))) + return 0xff; + + if (1 <= ch_id && ch_id <= 14) + return 0; + if (36 <= ch_id && ch_id <= 64) + return 1; + if (100 <= ch_id && ch_id <= 140) + return 2; + return 3; +} + +static u16 channel_id_to_txp(struct iwl_phy_db *phy_db, u16 ch_id) +{ + struct iwl_phy_db_chg_txp *txp_chg; + int i; + u8 ch_index = ch_id_to_ch_index(ch_id); + if (ch_index == 0xff) + return 0xff; + + for (i = 0; i < IWL_NUM_TXP_CH_GROUPS; i++) { + txp_chg = (void *)phy_db->calib_ch_group_txp[i].data; + if (!txp_chg) + return 0xff; + /* + * Looking for the first channel group that its max channel is + * higher then wanted channel. + */ + if (le16_to_cpu(txp_chg->max_channel_idx) >= ch_index) + return i; + } + return 0xff; +} +static +int iwl_phy_db_get_section_data(struct iwl_phy_db *phy_db, + u32 type, u8 **data, u16 *size, u16 ch_id) +{ + struct iwl_phy_db_entry *entry; + u16 ch_group_id = 0; + + if (!phy_db) + return -EINVAL; + + /* find wanted channel group */ + if (type == IWL_PHY_DB_CALIB_CHG_PAPD) + ch_group_id = channel_id_to_papd(ch_id); + else if (type == IWL_PHY_DB_CALIB_CHG_TXP) + ch_group_id = channel_id_to_txp(phy_db, ch_id); + + entry = iwl_phy_db_get_section(phy_db, type, ch_group_id); + if (!entry) + return -EINVAL; + + *data = entry->data; + *size = entry->size; + + IWL_DEBUG_INFO(phy_db->trans, + "%s(%d): [PHYDB] GET: Type %d , Size: %d\n", + __func__, __LINE__, type, *size); + + return 0; +} + +static int iwl_send_phy_db_cmd(struct iwl_phy_db *phy_db, u16 type, + u16 length, void *data) +{ + struct iwl_phy_db_cmd phy_db_cmd; + struct iwl_host_cmd cmd = { + .id = PHY_DB_CMD, + }; + + IWL_DEBUG_INFO(phy_db->trans, + "Sending PHY-DB hcmd of type %d, of length %d\n", + type, length); + + /* Set phy db cmd variables */ + phy_db_cmd.type = cpu_to_le16(type); + phy_db_cmd.length = cpu_to_le16(length); + + /* Set hcmd variables */ + cmd.data[0] = &phy_db_cmd; + cmd.len[0] = sizeof(struct iwl_phy_db_cmd); + cmd.data[1] = data; + cmd.len[1] = length; + cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY; + + return iwl_trans_send_cmd(phy_db->trans, &cmd); +} + +static int iwl_phy_db_send_all_channel_groups( + struct iwl_phy_db *phy_db, + enum iwl_phy_db_section_type type, + u8 max_ch_groups) +{ + u16 i; + int err; + struct iwl_phy_db_entry *entry; + + /* Send all the channel specific groups to operational fw */ + for (i = 0; i < max_ch_groups; i++) { + entry = iwl_phy_db_get_section(phy_db, + type, + i); + if (!entry) + return -EINVAL; + + if (!entry->size) + continue; + + /* Send the requested PHY DB section */ + err = iwl_send_phy_db_cmd(phy_db, + type, + entry->size, + entry->data); + if (err) { + IWL_ERR(phy_db->trans, + "Can't SEND phy_db section %d (%d), err %d\n", + type, i, err); + return err; + } + + IWL_DEBUG_INFO(phy_db->trans, + "Sent PHY_DB HCMD, type = %d num = %d\n", + type, i); + } + + return 0; +} + +int iwl_send_phy_db_data(struct iwl_phy_db *phy_db) +{ + u8 *data = NULL; + u16 size = 0; + int err; + + IWL_DEBUG_INFO(phy_db->trans, + "Sending phy db data and configuration to runtime image\n"); + + /* Send PHY DB CFG section */ + err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CFG, + &data, &size, 0); + if (err) { + IWL_ERR(phy_db->trans, "Cannot get Phy DB cfg section\n"); + return err; + } + + err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CFG, size, data); + if (err) { + IWL_ERR(phy_db->trans, + "Cannot send HCMD of Phy DB cfg section\n"); + return err; + } + + err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CALIB_NCH, + &data, &size, 0); + if (err) { + IWL_ERR(phy_db->trans, + "Cannot get Phy DB non specific channel section\n"); + return err; + } + + err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CALIB_NCH, size, data); + if (err) { + IWL_ERR(phy_db->trans, + "Cannot send HCMD of Phy DB non specific channel section\n"); + return err; + } + + /* Send all the TXP channel specific data */ + err = iwl_phy_db_send_all_channel_groups(phy_db, + IWL_PHY_DB_CALIB_CHG_PAPD, + IWL_NUM_PAPD_CH_GROUPS); + if (err) { + IWL_ERR(phy_db->trans, + "Cannot send channel specific PAPD groups\n"); + return err; + } + + /* Send all the TXP channel specific data */ + err = iwl_phy_db_send_all_channel_groups(phy_db, + IWL_PHY_DB_CALIB_CHG_TXP, + IWL_NUM_TXP_CH_GROUPS); + if (err) { + IWL_ERR(phy_db->trans, + "Cannot send channel specific TX power groups\n"); + return err; + } + + IWL_DEBUG_INFO(phy_db->trans, + "Finished sending phy db non channel data\n"); + return 0; +} +IWL_EXPORT_SYMBOL(iwl_send_phy_db_data); |