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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * This file contains the handling of command.
0004  * It prepares command and sends it to firmware when it is ready.
0005  */
0006 
0007 #include <linux/hardirq.h>
0008 #include <linux/kfifo.h>
0009 #include <linux/sched.h>
0010 #include <linux/slab.h>
0011 #include <linux/if_arp.h>
0012 #include <linux/export.h>
0013 
0014 #include "decl.h"
0015 #include "cfg.h"
0016 #include "cmd.h"
0017 
0018 #define CAL_NF(nf)      ((s32)(-(s32)(nf)))
0019 #define CAL_RSSI(snr, nf)   ((s32)((s32)(snr) + CAL_NF(nf)))
0020 
0021 /**
0022  * lbs_cmd_copyback - Simple callback that copies response back into command
0023  *
0024  * @priv:   A pointer to &struct lbs_private structure
0025  * @extra:  A pointer to the original command structure for which
0026  *      'resp' is a response
0027  * @resp:   A pointer to the command response
0028  *
0029  * returns: 0 on success, error on failure
0030  */
0031 int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
0032              struct cmd_header *resp)
0033 {
0034     struct cmd_header *buf = (void *)extra;
0035     uint16_t copy_len;
0036 
0037     copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
0038     memcpy(buf, resp, copy_len);
0039     return 0;
0040 }
0041 EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
0042 
0043 /**
0044  *  lbs_cmd_async_callback - Simple callback that ignores the result.
0045  *  Use this if you just want to send a command to the hardware, but don't
0046  *  care for the result.
0047  *
0048  *  @priv:  ignored
0049  *  @extra: ignored
0050  *  @resp:  ignored
0051  *
0052  *  returns:    0 for success
0053  */
0054 static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
0055              struct cmd_header *resp)
0056 {
0057     return 0;
0058 }
0059 
0060 
0061 /**
0062  *  is_command_allowed_in_ps - tests if a command is allowed in Power Save mode
0063  *
0064  *  @cmd:   the command ID
0065  *
0066  *  returns:    1 if allowed, 0 if not allowed
0067  */
0068 static u8 is_command_allowed_in_ps(u16 cmd)
0069 {
0070     switch (cmd) {
0071     case CMD_802_11_RSSI:
0072         return 1;
0073     case CMD_802_11_HOST_SLEEP_CFG:
0074         return 1;
0075     default:
0076         break;
0077     }
0078     return 0;
0079 }
0080 
0081 /**
0082  *  lbs_update_hw_spec - Updates the hardware details like MAC address
0083  *  and regulatory region
0084  *
0085  *  @priv:  A pointer to &struct lbs_private structure
0086  *
0087  *  returns:    0 on success, error on failure
0088  */
0089 int lbs_update_hw_spec(struct lbs_private *priv)
0090 {
0091     struct cmd_ds_get_hw_spec cmd;
0092     int ret = -1;
0093     u32 i;
0094 
0095     memset(&cmd, 0, sizeof(cmd));
0096     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0097     memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
0098     ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
0099     if (ret)
0100         goto out;
0101 
0102     priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
0103 
0104     /* The firmware release is in an interesting format: the patch
0105      * level is in the most significant nibble ... so fix that: */
0106     priv->fwrelease = le32_to_cpu(cmd.fwrelease);
0107     priv->fwrelease = (priv->fwrelease << 8) |
0108         (priv->fwrelease >> 24 & 0xff);
0109 
0110     /* Some firmware capabilities:
0111      * CF card    firmware 5.0.16p0:   cap 0x00000303
0112      * USB dongle firmware 5.110.17p2: cap 0x00000303
0113      */
0114     netdev_info(priv->dev, "%pM, fw %u.%u.%up%u, cap 0x%08x\n",
0115         cmd.permanentaddr,
0116         priv->fwrelease >> 24 & 0xff,
0117         priv->fwrelease >> 16 & 0xff,
0118         priv->fwrelease >>  8 & 0xff,
0119         priv->fwrelease       & 0xff,
0120         priv->fwcapinfo);
0121     lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
0122             cmd.hwifversion, cmd.version);
0123 
0124     /* Clamp region code to 8-bit since FW spec indicates that it should
0125      * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
0126      * returns non-zero high 8 bits here.
0127      *
0128      * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
0129      * need to check for this problem and handle it properly.
0130      */
0131     if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
0132         priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
0133     else
0134         priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
0135 
0136     for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
0137         /* use the region code to search for the index */
0138         if (priv->regioncode == lbs_region_code_to_index[i])
0139             break;
0140     }
0141 
0142     /* if it's unidentified region code, use the default (USA) */
0143     if (i >= MRVDRV_MAX_REGION_CODE) {
0144         priv->regioncode = 0x10;
0145         netdev_info(priv->dev,
0146                 "unidentified region code; using the default (USA)\n");
0147     }
0148 
0149     if (priv->current_addr[0] == 0xff)
0150         memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
0151 
0152     if (!priv->copied_hwaddr) {
0153         eth_hw_addr_set(priv->dev, priv->current_addr);
0154         if (priv->mesh_dev)
0155             eth_hw_addr_set(priv->mesh_dev, priv->current_addr);
0156         priv->copied_hwaddr = 1;
0157     }
0158 
0159 out:
0160     return ret;
0161 }
0162 
0163 static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
0164             struct cmd_header *resp)
0165 {
0166     if (priv->is_host_sleep_activated) {
0167         priv->is_host_sleep_configured = 0;
0168         if (priv->psstate == PS_STATE_FULL_POWER) {
0169             priv->is_host_sleep_activated = 0;
0170             wake_up_interruptible(&priv->host_sleep_q);
0171         }
0172     } else {
0173         priv->is_host_sleep_configured = 1;
0174     }
0175 
0176     return 0;
0177 }
0178 
0179 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
0180         struct wol_config *p_wol_config)
0181 {
0182     struct cmd_ds_host_sleep cmd_config;
0183     int ret;
0184 
0185     /*
0186      * Certain firmware versions do not support EHS_REMOVE_WAKEUP command
0187      * and the card will return a failure.  Since we need to be
0188      * able to reset the mask, in those cases we set a 0 mask instead.
0189      */
0190     if (criteria == EHS_REMOVE_WAKEUP && !priv->ehs_remove_supported)
0191         criteria = 0;
0192 
0193     cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
0194     cmd_config.criteria = cpu_to_le32(criteria);
0195     cmd_config.gpio = priv->wol_gpio;
0196     cmd_config.gap = priv->wol_gap;
0197 
0198     if (p_wol_config != NULL)
0199         memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
0200                 sizeof(struct wol_config));
0201     else
0202         cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
0203 
0204     ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
0205             le16_to_cpu(cmd_config.hdr.size),
0206             lbs_ret_host_sleep_cfg, 0);
0207     if (!ret) {
0208         if (p_wol_config)
0209             memcpy((uint8_t *) p_wol_config,
0210                     (uint8_t *)&cmd_config.wol_conf,
0211                     sizeof(struct wol_config));
0212     } else {
0213         netdev_info(priv->dev, "HOST_SLEEP_CFG failed %d\n", ret);
0214     }
0215 
0216     return ret;
0217 }
0218 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
0219 
0220 /**
0221  *  lbs_set_ps_mode - Sets the Power Save mode
0222  *
0223  *  @priv:  A pointer to &struct lbs_private structure
0224  *  @cmd_action: The Power Save operation (PS_MODE_ACTION_ENTER_PS or
0225  *                         PS_MODE_ACTION_EXIT_PS)
0226  *  @block: Whether to block on a response or not
0227  *
0228  *  returns:    0 on success, error on failure
0229  */
0230 int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
0231 {
0232     struct cmd_ds_802_11_ps_mode cmd;
0233     int ret = 0;
0234 
0235     memset(&cmd, 0, sizeof(cmd));
0236     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0237     cmd.action = cpu_to_le16(cmd_action);
0238 
0239     if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
0240         lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
0241         cmd.multipledtim = cpu_to_le16(1);  /* Default DTIM multiple */
0242     } else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
0243         lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
0244     } else {
0245         /* We don't handle CONFIRM_SLEEP here because it needs to
0246          * be fastpathed to the firmware.
0247          */
0248         lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
0249         ret = -EOPNOTSUPP;
0250         goto out;
0251     }
0252 
0253     if (block)
0254         ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
0255     else
0256         lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));
0257 
0258 out:
0259     return ret;
0260 }
0261 
0262 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
0263                 struct sleep_params *sp)
0264 {
0265     struct cmd_ds_802_11_sleep_params cmd;
0266     int ret;
0267 
0268     if (cmd_action == CMD_ACT_GET) {
0269         memset(&cmd, 0, sizeof(cmd));
0270     } else {
0271         cmd.error = cpu_to_le16(sp->sp_error);
0272         cmd.offset = cpu_to_le16(sp->sp_offset);
0273         cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
0274         cmd.calcontrol = sp->sp_calcontrol;
0275         cmd.externalsleepclk = sp->sp_extsleepclk;
0276         cmd.reserved = cpu_to_le16(sp->sp_reserved);
0277     }
0278     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0279     cmd.action = cpu_to_le16(cmd_action);
0280 
0281     ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
0282 
0283     if (!ret) {
0284         lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
0285                 "calcontrol 0x%x extsleepclk 0x%x\n",
0286                 le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
0287                 le16_to_cpu(cmd.stabletime), cmd.calcontrol,
0288                 cmd.externalsleepclk);
0289 
0290         sp->sp_error = le16_to_cpu(cmd.error);
0291         sp->sp_offset = le16_to_cpu(cmd.offset);
0292         sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
0293         sp->sp_calcontrol = cmd.calcontrol;
0294         sp->sp_extsleepclk = cmd.externalsleepclk;
0295         sp->sp_reserved = le16_to_cpu(cmd.reserved);
0296     }
0297 
0298     return ret;
0299 }
0300 
0301 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
0302 {
0303     int ret = 0;
0304 
0305     if (priv->is_deep_sleep) {
0306         if (!wait_event_interruptible_timeout(priv->ds_awake_q,
0307                     !priv->is_deep_sleep, (10 * HZ))) {
0308             netdev_err(priv->dev, "ds_awake_q: timer expired\n");
0309             ret = -1;
0310         }
0311     }
0312 
0313     return ret;
0314 }
0315 
0316 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
0317 {
0318     int ret =  0;
0319 
0320     if (deep_sleep) {
0321         if (priv->is_deep_sleep != 1) {
0322             lbs_deb_cmd("deep sleep: sleep\n");
0323             BUG_ON(!priv->enter_deep_sleep);
0324             ret = priv->enter_deep_sleep(priv);
0325             if (!ret) {
0326                 netif_stop_queue(priv->dev);
0327                 netif_carrier_off(priv->dev);
0328             }
0329         } else {
0330             netdev_err(priv->dev, "deep sleep: already enabled\n");
0331         }
0332     } else {
0333         if (priv->is_deep_sleep) {
0334             lbs_deb_cmd("deep sleep: wakeup\n");
0335             BUG_ON(!priv->exit_deep_sleep);
0336             ret = priv->exit_deep_sleep(priv);
0337             if (!ret) {
0338                 ret = lbs_wait_for_ds_awake(priv);
0339                 if (ret)
0340                     netdev_err(priv->dev,
0341                            "deep sleep: wakeup failed\n");
0342             }
0343         }
0344     }
0345 
0346     return ret;
0347 }
0348 
0349 static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
0350         unsigned long dummy,
0351         struct cmd_header *cmd)
0352 {
0353     priv->is_host_sleep_activated = 1;
0354     wake_up_interruptible(&priv->host_sleep_q);
0355 
0356     return 0;
0357 }
0358 
0359 int lbs_set_host_sleep(struct lbs_private *priv, int host_sleep)
0360 {
0361     struct cmd_header cmd;
0362     int ret = 0;
0363     uint32_t criteria = EHS_REMOVE_WAKEUP;
0364 
0365     if (host_sleep) {
0366         if (priv->is_host_sleep_activated != 1) {
0367             memset(&cmd, 0, sizeof(cmd));
0368             ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
0369                     (struct wol_config *)NULL);
0370             if (ret) {
0371                 netdev_info(priv->dev,
0372                         "Host sleep configuration failed: %d\n",
0373                         ret);
0374                 return ret;
0375             }
0376             if (priv->psstate == PS_STATE_FULL_POWER) {
0377                 ret = __lbs_cmd(priv,
0378                         CMD_802_11_HOST_SLEEP_ACTIVATE,
0379                         &cmd,
0380                         sizeof(cmd),
0381                         lbs_ret_host_sleep_activate, 0);
0382                 if (ret)
0383                     netdev_info(priv->dev,
0384                             "HOST_SLEEP_ACTIVATE failed: %d\n",
0385                             ret);
0386             }
0387 
0388             if (!wait_event_interruptible_timeout(
0389                         priv->host_sleep_q,
0390                         priv->is_host_sleep_activated,
0391                         (10 * HZ))) {
0392                 netdev_err(priv->dev,
0393                        "host_sleep_q: timer expired\n");
0394                 ret = -1;
0395             }
0396         } else {
0397             netdev_err(priv->dev, "host sleep: already enabled\n");
0398         }
0399     } else {
0400         if (priv->is_host_sleep_activated)
0401             ret = lbs_host_sleep_cfg(priv, criteria,
0402                     (struct wol_config *)NULL);
0403     }
0404 
0405     return ret;
0406 }
0407 
0408 /**
0409  *  lbs_set_snmp_mib - Set an SNMP MIB value
0410  *
0411  *  @priv:  A pointer to &struct lbs_private structure
0412  *  @oid:   The OID to set in the firmware
0413  *  @val:   Value to set the OID to
0414  *
0415  *  returns:        0 on success, error on failure
0416  */
0417 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
0418 {
0419     struct cmd_ds_802_11_snmp_mib cmd;
0420     int ret;
0421 
0422     memset(&cmd, 0, sizeof (cmd));
0423     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0424     cmd.action = cpu_to_le16(CMD_ACT_SET);
0425     cmd.oid = cpu_to_le16((u16) oid);
0426 
0427     switch (oid) {
0428     case SNMP_MIB_OID_BSS_TYPE:
0429         cmd.bufsize = cpu_to_le16(sizeof(u8));
0430         cmd.value[0] = val;
0431         break;
0432     case SNMP_MIB_OID_11D_ENABLE:
0433     case SNMP_MIB_OID_FRAG_THRESHOLD:
0434     case SNMP_MIB_OID_RTS_THRESHOLD:
0435     case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
0436     case SNMP_MIB_OID_LONG_RETRY_LIMIT:
0437         cmd.bufsize = cpu_to_le16(sizeof(u16));
0438         *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
0439         break;
0440     default:
0441         lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
0442         ret = -EINVAL;
0443         goto out;
0444     }
0445 
0446     lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
0447             le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
0448 
0449     ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
0450 
0451 out:
0452     return ret;
0453 }
0454 
0455 /**
0456  *  lbs_get_snmp_mib - Get an SNMP MIB value
0457  *
0458  *  @priv:  A pointer to &struct lbs_private structure
0459  *  @oid:   The OID to retrieve from the firmware
0460  *  @out_val:   Location for the returned value
0461  *
0462  *  returns:    0 on success, error on failure
0463  */
0464 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
0465 {
0466     struct cmd_ds_802_11_snmp_mib cmd;
0467     int ret;
0468 
0469     memset(&cmd, 0, sizeof (cmd));
0470     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0471     cmd.action = cpu_to_le16(CMD_ACT_GET);
0472     cmd.oid = cpu_to_le16(oid);
0473 
0474     ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
0475     if (ret)
0476         goto out;
0477 
0478     switch (le16_to_cpu(cmd.bufsize)) {
0479     case sizeof(u8):
0480         *out_val = cmd.value[0];
0481         break;
0482     case sizeof(u16):
0483         *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
0484         break;
0485     default:
0486         lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
0487                     oid, le16_to_cpu(cmd.bufsize));
0488         break;
0489     }
0490 
0491 out:
0492     return ret;
0493 }
0494 
0495 /**
0496  *  lbs_get_tx_power - Get the min, max, and current TX power
0497  *
0498  *  @priv:  A pointer to &struct lbs_private structure
0499  *  @curlevel:  Current power level in dBm
0500  *  @minlevel:  Minimum supported power level in dBm (optional)
0501  *  @maxlevel:  Maximum supported power level in dBm (optional)
0502  *
0503  *  returns:    0 on success, error on failure
0504  */
0505 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
0506              s16 *maxlevel)
0507 {
0508     struct cmd_ds_802_11_rf_tx_power cmd;
0509     int ret;
0510 
0511     memset(&cmd, 0, sizeof(cmd));
0512     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0513     cmd.action = cpu_to_le16(CMD_ACT_GET);
0514 
0515     ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
0516     if (ret == 0) {
0517         *curlevel = le16_to_cpu(cmd.curlevel);
0518         if (minlevel)
0519             *minlevel = cmd.minlevel;
0520         if (maxlevel)
0521             *maxlevel = cmd.maxlevel;
0522     }
0523 
0524     return ret;
0525 }
0526 
0527 /**
0528  *  lbs_set_tx_power - Set the TX power
0529  *
0530  *  @priv:  A pointer to &struct lbs_private structure
0531  *  @dbm:   The desired power level in dBm
0532  *
0533  *  returns:        0 on success, error on failure
0534  */
0535 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
0536 {
0537     struct cmd_ds_802_11_rf_tx_power cmd;
0538     int ret;
0539 
0540     memset(&cmd, 0, sizeof(cmd));
0541     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0542     cmd.action = cpu_to_le16(CMD_ACT_SET);
0543     cmd.curlevel = cpu_to_le16(dbm);
0544 
0545     lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
0546 
0547     ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
0548 
0549     return ret;
0550 }
0551 
0552 /**
0553  *  lbs_set_monitor_mode - Enable or disable monitor mode
0554  *  (only implemented on OLPC usb8388 FW)
0555  *
0556  *  @priv:  A pointer to &struct lbs_private structure
0557  *  @enable:    1 to enable monitor mode, 0 to disable
0558  *
0559  *  returns:    0 on success, error on failure
0560  */
0561 int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
0562 {
0563     struct cmd_ds_802_11_monitor_mode cmd;
0564     int ret;
0565 
0566     memset(&cmd, 0, sizeof(cmd));
0567     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0568     cmd.action = cpu_to_le16(CMD_ACT_SET);
0569     if (enable)
0570         cmd.mode = cpu_to_le16(0x1);
0571 
0572     lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);
0573 
0574     ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
0575     if (ret == 0) {
0576         priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
0577                         ARPHRD_ETHER;
0578     }
0579 
0580     return ret;
0581 }
0582 
0583 /**
0584  *  lbs_get_channel - Get the radio channel
0585  *
0586  *  @priv:  A pointer to &struct lbs_private structure
0587  *
0588  *  returns:    The channel on success, error on failure
0589  */
0590 static int lbs_get_channel(struct lbs_private *priv)
0591 {
0592     struct cmd_ds_802_11_rf_channel cmd;
0593     int ret = 0;
0594 
0595     memset(&cmd, 0, sizeof(cmd));
0596     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0597     cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
0598 
0599     ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
0600     if (ret)
0601         goto out;
0602 
0603     ret = le16_to_cpu(cmd.channel);
0604     lbs_deb_cmd("current radio channel is %d\n", ret);
0605 
0606 out:
0607     return ret;
0608 }
0609 
0610 int lbs_update_channel(struct lbs_private *priv)
0611 {
0612     int ret;
0613 
0614     /* the channel in f/w could be out of sync; get the current channel */
0615     ret = lbs_get_channel(priv);
0616     if (ret > 0) {
0617         priv->channel = ret;
0618         ret = 0;
0619     }
0620 
0621     return ret;
0622 }
0623 
0624 /**
0625  *  lbs_set_channel - Set the radio channel
0626  *
0627  *  @priv:  A pointer to &struct lbs_private structure
0628  *  @channel:   The desired channel, or 0 to clear a locked channel
0629  *
0630  *  returns:    0 on success, error on failure
0631  */
0632 int lbs_set_channel(struct lbs_private *priv, u8 channel)
0633 {
0634     struct cmd_ds_802_11_rf_channel cmd;
0635 #ifdef DEBUG
0636     u8 old_channel = priv->channel;
0637 #endif
0638     int ret = 0;
0639 
0640     memset(&cmd, 0, sizeof(cmd));
0641     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0642     cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
0643     cmd.channel = cpu_to_le16(channel);
0644 
0645     ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
0646     if (ret)
0647         goto out;
0648 
0649     priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
0650     lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
0651         priv->channel);
0652 
0653 out:
0654     return ret;
0655 }
0656 
0657 /**
0658  * lbs_get_rssi - Get current RSSI and noise floor
0659  *
0660  * @priv:   A pointer to &struct lbs_private structure
0661  * @rssi:   On successful return, signal level in mBm
0662  * @nf:     On successful return, Noise floor
0663  *
0664  * returns: The channel on success, error on failure
0665  */
0666 int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
0667 {
0668     struct cmd_ds_802_11_rssi cmd;
0669     int ret = 0;
0670 
0671     BUG_ON(rssi == NULL);
0672     BUG_ON(nf == NULL);
0673 
0674     memset(&cmd, 0, sizeof(cmd));
0675     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0676     /* Average SNR over last 8 beacons */
0677     cmd.n_or_snr = cpu_to_le16(8);
0678 
0679     ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
0680     if (ret == 0) {
0681         *nf = CAL_NF(le16_to_cpu(cmd.nf));
0682         *rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
0683     }
0684 
0685     return ret;
0686 }
0687 
0688 /**
0689  *  lbs_set_11d_domain_info - Send regulatory and 802.11d domain information
0690  *  to the firmware
0691  *
0692  *  @priv:  pointer to &struct lbs_private
0693  *
0694  *  returns:    0 on success, error code on failure
0695 */
0696 int lbs_set_11d_domain_info(struct lbs_private *priv)
0697 {
0698     struct wiphy *wiphy = priv->wdev->wiphy;
0699     struct ieee80211_supported_band **bands = wiphy->bands;
0700     struct cmd_ds_802_11d_domain_info cmd;
0701     struct mrvl_ie_domain_param_set *domain = &cmd.domain;
0702     struct ieee80211_country_ie_triplet *t;
0703     enum nl80211_band band;
0704     struct ieee80211_channel *ch;
0705     u8 num_triplet = 0;
0706     u8 num_parsed_chan = 0;
0707     u8 first_channel = 0, next_chan = 0, max_pwr = 0;
0708     u8 i, flag = 0;
0709     size_t triplet_size;
0710     int ret = 0;
0711 
0712     if (!priv->country_code[0])
0713         goto out;
0714 
0715     memset(&cmd, 0, sizeof(cmd));
0716     cmd.action = cpu_to_le16(CMD_ACT_SET);
0717 
0718     lbs_deb_11d("Setting country code '%c%c'\n",
0719             priv->country_code[0], priv->country_code[1]);
0720 
0721     domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
0722 
0723     /* Set country code */
0724     domain->country_code[0] = priv->country_code[0];
0725     domain->country_code[1] = priv->country_code[1];
0726     domain->country_code[2] = ' ';
0727 
0728     /* Now set up the channel triplets; firmware is somewhat picky here
0729      * and doesn't validate channel numbers and spans; hence it would
0730      * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39.  Since
0731      * the last 3 aren't valid channels, the driver is responsible for
0732      * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
0733      * etc.
0734      */
0735     for (band = 0;
0736          (band < NUM_NL80211_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
0737          band++) {
0738 
0739         if (!bands[band])
0740             continue;
0741 
0742         for (i = 0;
0743              (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
0744              i++) {
0745             ch = &bands[band]->channels[i];
0746             if (ch->flags & IEEE80211_CHAN_DISABLED)
0747                 continue;
0748 
0749             if (!flag) {
0750                 flag = 1;
0751                 next_chan = first_channel = (u32) ch->hw_value;
0752                 max_pwr = ch->max_power;
0753                 num_parsed_chan = 1;
0754                 continue;
0755             }
0756 
0757             if ((ch->hw_value == next_chan + 1) &&
0758                     (ch->max_power == max_pwr)) {
0759                 /* Consolidate adjacent channels */
0760                 next_chan++;
0761                 num_parsed_chan++;
0762             } else {
0763                 /* Add this triplet */
0764                 lbs_deb_11d("11D triplet (%d, %d, %d)\n",
0765                     first_channel, num_parsed_chan,
0766                     max_pwr);
0767                 t = &domain->triplet[num_triplet];
0768                 t->chans.first_channel = first_channel;
0769                 t->chans.num_channels = num_parsed_chan;
0770                 t->chans.max_power = max_pwr;
0771                 num_triplet++;
0772                 flag = 0;
0773             }
0774         }
0775 
0776         if (flag) {
0777             /* Add last triplet */
0778             lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
0779                 num_parsed_chan, max_pwr);
0780             t = &domain->triplet[num_triplet];
0781             t->chans.first_channel = first_channel;
0782             t->chans.num_channels = num_parsed_chan;
0783             t->chans.max_power = max_pwr;
0784             num_triplet++;
0785         }
0786     }
0787 
0788     lbs_deb_11d("# triplets %d\n", num_triplet);
0789 
0790     /* Set command header sizes */
0791     triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
0792     domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
0793                     triplet_size);
0794 
0795     lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
0796             (u8 *) &cmd.domain.country_code,
0797             le16_to_cpu(domain->header.len));
0798 
0799     cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
0800                    sizeof(cmd.action) +
0801                    sizeof(cmd.domain.header) +
0802                    sizeof(cmd.domain.country_code) +
0803                    triplet_size);
0804 
0805     ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);
0806 
0807 out:
0808     return ret;
0809 }
0810 
0811 /**
0812  *  lbs_get_reg - Read a MAC, Baseband, or RF register
0813  *
0814  *  @priv:  pointer to &struct lbs_private
0815  *  @reg:   register command, one of CMD_MAC_REG_ACCESS,
0816  *      CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
0817  *  @offset:    byte offset of the register to get
0818  *  @value: on success, the value of the register at 'offset'
0819  *
0820  *  returns:    0 on success, error code on failure
0821 */
0822 int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
0823 {
0824     struct cmd_ds_reg_access cmd;
0825     int ret = 0;
0826 
0827     BUG_ON(value == NULL);
0828 
0829     memset(&cmd, 0, sizeof(cmd));
0830     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0831     cmd.action = cpu_to_le16(CMD_ACT_GET);
0832     cmd.offset = cpu_to_le16(offset);
0833 
0834     if (reg != CMD_MAC_REG_ACCESS &&
0835         reg != CMD_BBP_REG_ACCESS &&
0836         reg != CMD_RF_REG_ACCESS) {
0837         ret = -EINVAL;
0838         goto out;
0839     }
0840 
0841     ret = lbs_cmd_with_response(priv, reg, &cmd);
0842     if (!ret) {
0843         if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
0844             *value = cmd.value.bbp_rf;
0845         else if (reg == CMD_MAC_REG_ACCESS)
0846             *value = le32_to_cpu(cmd.value.mac);
0847     }
0848 
0849 out:
0850     return ret;
0851 }
0852 
0853 /**
0854  *  lbs_set_reg - Write a MAC, Baseband, or RF register
0855  *
0856  *  @priv:  pointer to &struct lbs_private
0857  *  @reg:   register command, one of CMD_MAC_REG_ACCESS,
0858  *      CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
0859  *  @offset:    byte offset of the register to set
0860  *  @value: the value to write to the register at 'offset'
0861  *
0862  *  returns:    0 on success, error code on failure
0863 */
0864 int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
0865 {
0866     struct cmd_ds_reg_access cmd;
0867     int ret = 0;
0868 
0869     memset(&cmd, 0, sizeof(cmd));
0870     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0871     cmd.action = cpu_to_le16(CMD_ACT_SET);
0872     cmd.offset = cpu_to_le16(offset);
0873 
0874     if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
0875         cmd.value.bbp_rf = (u8) (value & 0xFF);
0876     else if (reg == CMD_MAC_REG_ACCESS)
0877         cmd.value.mac = cpu_to_le32(value);
0878     else {
0879         ret = -EINVAL;
0880         goto out;
0881     }
0882 
0883     ret = lbs_cmd_with_response(priv, reg, &cmd);
0884 
0885 out:
0886     return ret;
0887 }
0888 
0889 static void lbs_queue_cmd(struct lbs_private *priv,
0890               struct cmd_ctrl_node *cmdnode)
0891 {
0892     unsigned long flags;
0893     int addtail = 1;
0894 
0895     if (!cmdnode) {
0896         lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
0897         return;
0898     }
0899     if (!cmdnode->cmdbuf->size) {
0900         lbs_deb_host("DNLD_CMD: cmd size is zero\n");
0901         return;
0902     }
0903     cmdnode->result = 0;
0904 
0905     /* Exit_PS command needs to be queued in the header always. */
0906     if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
0907         struct cmd_ds_802_11_ps_mode *psm = (void *)cmdnode->cmdbuf;
0908 
0909         if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
0910             if (priv->psstate != PS_STATE_FULL_POWER)
0911                 addtail = 0;
0912         }
0913     }
0914 
0915     if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
0916         addtail = 0;
0917 
0918     spin_lock_irqsave(&priv->driver_lock, flags);
0919 
0920     if (addtail)
0921         list_add_tail(&cmdnode->list, &priv->cmdpendingq);
0922     else
0923         list_add(&cmdnode->list, &priv->cmdpendingq);
0924 
0925     spin_unlock_irqrestore(&priv->driver_lock, flags);
0926 
0927     lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
0928              le16_to_cpu(cmdnode->cmdbuf->command));
0929 }
0930 
0931 static void lbs_submit_command(struct lbs_private *priv,
0932                    struct cmd_ctrl_node *cmdnode)
0933 {
0934     unsigned long flags;
0935     struct cmd_header *cmd;
0936     uint16_t cmdsize;
0937     uint16_t command;
0938     int timeo = 3 * HZ;
0939     int ret;
0940 
0941     cmd = cmdnode->cmdbuf;
0942 
0943     spin_lock_irqsave(&priv->driver_lock, flags);
0944     priv->seqnum++;
0945     cmd->seqnum = cpu_to_le16(priv->seqnum);
0946     priv->cur_cmd = cmdnode;
0947     spin_unlock_irqrestore(&priv->driver_lock, flags);
0948 
0949     cmdsize = le16_to_cpu(cmd->size);
0950     command = le16_to_cpu(cmd->command);
0951 
0952     /* These commands take longer */
0953     if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
0954         timeo = 5 * HZ;
0955 
0956     lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
0957              command, le16_to_cpu(cmd->seqnum), cmdsize);
0958     lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
0959 
0960     ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
0961 
0962     if (ret) {
0963         netdev_info(priv->dev, "DNLD_CMD: hw_host_to_card failed: %d\n",
0964                 ret);
0965         /* Reset dnld state machine, report failure */
0966         priv->dnld_sent = DNLD_RES_RECEIVED;
0967         lbs_complete_command(priv, cmdnode, ret);
0968     }
0969 
0970     if (command == CMD_802_11_DEEP_SLEEP) {
0971         if (priv->is_auto_deep_sleep_enabled) {
0972             priv->wakeup_dev_required = 1;
0973             priv->dnld_sent = 0;
0974         }
0975         priv->is_deep_sleep = 1;
0976         lbs_complete_command(priv, cmdnode, 0);
0977     } else {
0978         /* Setup the timer after transmit command */
0979         mod_timer(&priv->command_timer, jiffies + timeo);
0980     }
0981 }
0982 
0983 /*
0984  *  This function inserts command node to cmdfreeq
0985  *  after cleans it. Requires priv->driver_lock held.
0986  */
0987 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
0988                      struct cmd_ctrl_node *cmdnode)
0989 {
0990     if (!cmdnode)
0991         return;
0992 
0993     cmdnode->callback = NULL;
0994     cmdnode->callback_arg = 0;
0995 
0996     memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
0997 
0998     list_add_tail(&cmdnode->list, &priv->cmdfreeq);
0999 }
1000 
1001 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1002     struct cmd_ctrl_node *ptempcmd)
1003 {
1004     unsigned long flags;
1005 
1006     spin_lock_irqsave(&priv->driver_lock, flags);
1007     __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
1008     spin_unlock_irqrestore(&priv->driver_lock, flags);
1009 }
1010 
1011 void __lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1012                 int result)
1013 {
1014     /*
1015      * Normally, commands are removed from cmdpendingq before being
1016      * submitted. However, we can arrive here on alternative codepaths
1017      * where the command is still pending. Make sure the command really
1018      * isn't part of a list at this point.
1019      */
1020     list_del_init(&cmd->list);
1021 
1022     cmd->result = result;
1023     cmd->cmdwaitqwoken = 1;
1024     wake_up(&cmd->cmdwait_q);
1025 
1026     if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
1027         __lbs_cleanup_and_insert_cmd(priv, cmd);
1028     priv->cur_cmd = NULL;
1029     wake_up(&priv->waitq);
1030 }
1031 
1032 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1033               int result)
1034 {
1035     unsigned long flags;
1036     spin_lock_irqsave(&priv->driver_lock, flags);
1037     __lbs_complete_command(priv, cmd, result);
1038     spin_unlock_irqrestore(&priv->driver_lock, flags);
1039 }
1040 
1041 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
1042 {
1043     struct cmd_ds_802_11_radio_control cmd;
1044     int ret = -EINVAL;
1045 
1046     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1047     cmd.action = cpu_to_le16(CMD_ACT_SET);
1048     cmd.control = 0;
1049 
1050     /* Only v8 and below support setting the preamble */
1051     if (priv->fwrelease < 0x09000000) {
1052         switch (preamble) {
1053         case RADIO_PREAMBLE_SHORT:
1054         case RADIO_PREAMBLE_AUTO:
1055         case RADIO_PREAMBLE_LONG:
1056             cmd.control = cpu_to_le16(preamble);
1057             break;
1058         default:
1059             goto out;
1060         }
1061     }
1062 
1063     if (radio_on)
1064         cmd.control |= cpu_to_le16(0x1);
1065     else {
1066         cmd.control &= cpu_to_le16(~0x1);
1067         priv->txpower_cur = 0;
1068     }
1069 
1070     lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
1071             radio_on ? "ON" : "OFF", preamble);
1072 
1073     priv->radio_on = radio_on;
1074 
1075     ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
1076 
1077 out:
1078     return ret;
1079 }
1080 
1081 void lbs_set_mac_control(struct lbs_private *priv)
1082 {
1083     struct cmd_ds_mac_control cmd;
1084 
1085     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1086     cmd.action = cpu_to_le16(priv->mac_control);
1087     cmd.reserved = 0;
1088 
1089     lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
1090 }
1091 
1092 int lbs_set_mac_control_sync(struct lbs_private *priv)
1093 {
1094     struct cmd_ds_mac_control cmd;
1095     int ret = 0;
1096 
1097     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1098     cmd.action = cpu_to_le16(priv->mac_control);
1099     cmd.reserved = 0;
1100     ret = lbs_cmd_with_response(priv, CMD_MAC_CONTROL, &cmd);
1101 
1102     return ret;
1103 }
1104 
1105 /**
1106  *  lbs_allocate_cmd_buffer - allocates the command buffer and links
1107  *  it to command free queue
1108  *
1109  *  @priv:  A pointer to &struct lbs_private structure
1110  *
1111  *  returns:    0 for success or -1 on error
1112  */
1113 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1114 {
1115     int ret = 0;
1116     u32 bufsize;
1117     u32 i;
1118     struct cmd_ctrl_node *cmdarray;
1119 
1120     /* Allocate and initialize the command array */
1121     bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1122     if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1123         lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1124         ret = -1;
1125         goto done;
1126     }
1127     priv->cmd_array = cmdarray;
1128 
1129     /* Allocate and initialize each command buffer in the command array */
1130     for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1131         cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1132         if (!cmdarray[i].cmdbuf) {
1133             lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1134             ret = -1;
1135             goto done;
1136         }
1137     }
1138 
1139     for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1140         init_waitqueue_head(&cmdarray[i].cmdwait_q);
1141         lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1142     }
1143     ret = 0;
1144 
1145 done:
1146     return ret;
1147 }
1148 
1149 /**
1150  *  lbs_free_cmd_buffer - free the command buffer
1151  *
1152  *  @priv:  A pointer to &struct lbs_private structure
1153  *
1154  *  returns:    0 for success
1155  */
1156 int lbs_free_cmd_buffer(struct lbs_private *priv)
1157 {
1158     struct cmd_ctrl_node *cmdarray;
1159     unsigned int i;
1160 
1161     /* need to check if cmd array is allocated or not */
1162     if (priv->cmd_array == NULL) {
1163         lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1164         goto done;
1165     }
1166 
1167     cmdarray = priv->cmd_array;
1168 
1169     /* Release shared memory buffers */
1170     for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1171         if (cmdarray[i].cmdbuf) {
1172             kfree(cmdarray[i].cmdbuf);
1173             cmdarray[i].cmdbuf = NULL;
1174         }
1175     }
1176 
1177     /* Release cmd_ctrl_node */
1178     if (priv->cmd_array) {
1179         kfree(priv->cmd_array);
1180         priv->cmd_array = NULL;
1181     }
1182 
1183 done:
1184     return 0;
1185 }
1186 
1187 /**
1188  *  lbs_get_free_cmd_node - gets a free command node if available in
1189  *  command free queue
1190  *
1191  *  @priv:  A pointer to &struct lbs_private structure
1192  *
1193  *  returns:    A pointer to &cmd_ctrl_node structure on success
1194  *      or %NULL on error
1195  */
1196 static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
1197 {
1198     struct cmd_ctrl_node *tempnode;
1199     unsigned long flags;
1200 
1201     if (!priv)
1202         return NULL;
1203 
1204     spin_lock_irqsave(&priv->driver_lock, flags);
1205 
1206     if (!list_empty(&priv->cmdfreeq)) {
1207         tempnode = list_first_entry(&priv->cmdfreeq,
1208                         struct cmd_ctrl_node, list);
1209         list_del_init(&tempnode->list);
1210     } else {
1211         lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1212         tempnode = NULL;
1213     }
1214 
1215     spin_unlock_irqrestore(&priv->driver_lock, flags);
1216 
1217     return tempnode;
1218 }
1219 
1220 /**
1221  *  lbs_execute_next_command - execute next command in command
1222  *  pending queue. Will put firmware back to PS mode if applicable.
1223  *
1224  *  @priv:  A pointer to &struct lbs_private structure
1225  *
1226  *  returns:    0 on success or -1 on error
1227  */
1228 int lbs_execute_next_command(struct lbs_private *priv)
1229 {
1230     struct cmd_ctrl_node *cmdnode = NULL;
1231     struct cmd_header *cmd;
1232     unsigned long flags;
1233     int ret = 0;
1234 
1235     /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1236      * only caller to us is lbs_thread() and we get even when a
1237      * data packet is received */
1238     spin_lock_irqsave(&priv->driver_lock, flags);
1239 
1240     if (priv->cur_cmd) {
1241         netdev_alert(priv->dev,
1242                  "EXEC_NEXT_CMD: already processing command!\n");
1243         spin_unlock_irqrestore(&priv->driver_lock, flags);
1244         ret = -1;
1245         goto done;
1246     }
1247 
1248     if (!list_empty(&priv->cmdpendingq)) {
1249         cmdnode = list_first_entry(&priv->cmdpendingq,
1250                        struct cmd_ctrl_node, list);
1251     }
1252 
1253     spin_unlock_irqrestore(&priv->driver_lock, flags);
1254 
1255     if (cmdnode) {
1256         cmd = cmdnode->cmdbuf;
1257 
1258         if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1259             if ((priv->psstate == PS_STATE_SLEEP) ||
1260                 (priv->psstate == PS_STATE_PRE_SLEEP)) {
1261                 lbs_deb_host(
1262                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1263                        le16_to_cpu(cmd->command),
1264                        priv->psstate);
1265                 ret = -1;
1266                 goto done;
1267             }
1268             lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1269                      "0x%04x in psstate %d\n",
1270                      le16_to_cpu(cmd->command), priv->psstate);
1271         } else if (priv->psstate != PS_STATE_FULL_POWER) {
1272             /*
1273              * 1. Non-PS command:
1274              * Queue it. set needtowakeup to TRUE if current state
1275              * is SLEEP, otherwise call send EXIT_PS.
1276              * 2. PS command but not EXIT_PS:
1277              * Ignore it.
1278              * 3. PS command EXIT_PS:
1279              * Set needtowakeup to TRUE if current state is SLEEP,
1280              * otherwise send this command down to firmware
1281              * immediately.
1282              */
1283             if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1284                 /*  Prepare to send Exit PS,
1285                  *  this non PS command will be sent later */
1286                 if ((priv->psstate == PS_STATE_SLEEP)
1287                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1288                     ) {
1289                     /* w/ new scheme, it will not reach here.
1290                        since it is blocked in main_thread. */
1291                     priv->needtowakeup = 1;
1292                 } else {
1293                     lbs_set_ps_mode(priv,
1294                             PS_MODE_ACTION_EXIT_PS,
1295                             false);
1296                 }
1297 
1298                 ret = 0;
1299                 goto done;
1300             } else {
1301                 /*
1302                  * PS command. Ignore it if it is not Exit_PS.
1303                  * otherwise send it down immediately.
1304                  */
1305                 struct cmd_ds_802_11_ps_mode *psm = (void *)cmd;
1306 
1307                 lbs_deb_host(
1308                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1309                        psm->action);
1310                 if (psm->action !=
1311                     cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
1312                     lbs_deb_host(
1313                            "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1314                     lbs_complete_command(priv, cmdnode, 0);
1315 
1316                     ret = 0;
1317                     goto done;
1318                 }
1319 
1320                 if ((priv->psstate == PS_STATE_SLEEP) ||
1321                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1322                     lbs_deb_host(
1323                            "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1324                     lbs_complete_command(priv, cmdnode, 0);
1325                     priv->needtowakeup = 1;
1326 
1327                     ret = 0;
1328                     goto done;
1329                 }
1330 
1331                 lbs_deb_host(
1332                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1333             }
1334         }
1335         spin_lock_irqsave(&priv->driver_lock, flags);
1336         list_del_init(&cmdnode->list);
1337         spin_unlock_irqrestore(&priv->driver_lock, flags);
1338         lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1339                 le16_to_cpu(cmd->command));
1340         lbs_submit_command(priv, cmdnode);
1341     } else {
1342         /*
1343          * check if in power save mode, if yes, put the device back
1344          * to PS mode
1345          */
1346         if ((priv->psmode != LBS802_11POWERMODECAM) &&
1347             (priv->psstate == PS_STATE_FULL_POWER) &&
1348             (priv->connect_status == LBS_CONNECTED)) {
1349             lbs_deb_host(
1350                 "EXEC_NEXT_CMD: cmdpendingq empty, go back to PS_SLEEP");
1351             lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
1352                     false);
1353         }
1354     }
1355 
1356     ret = 0;
1357 done:
1358     return ret;
1359 }
1360 
1361 static void lbs_send_confirmsleep(struct lbs_private *priv)
1362 {
1363     unsigned long flags;
1364     int ret;
1365 
1366     lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1367         sizeof(confirm_sleep));
1368 
1369     ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1370         sizeof(confirm_sleep));
1371     if (ret) {
1372         netdev_alert(priv->dev, "confirm_sleep failed\n");
1373         return;
1374     }
1375 
1376     spin_lock_irqsave(&priv->driver_lock, flags);
1377 
1378     /* We don't get a response on the sleep-confirmation */
1379     priv->dnld_sent = DNLD_RES_RECEIVED;
1380 
1381     if (priv->is_host_sleep_configured) {
1382         priv->is_host_sleep_activated = 1;
1383         wake_up_interruptible(&priv->host_sleep_q);
1384     }
1385 
1386     /* If nothing to do, go back to sleep (?) */
1387     if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1388         priv->psstate = PS_STATE_SLEEP;
1389 
1390     spin_unlock_irqrestore(&priv->driver_lock, flags);
1391 }
1392 
1393 /**
1394  * lbs_ps_confirm_sleep - checks condition and prepares to
1395  * send sleep confirm command to firmware if ok
1396  *
1397  * @priv:   A pointer to &struct lbs_private structure
1398  *
1399  * returns: n/a
1400  */
1401 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1402 {
1403     unsigned long flags =0;
1404     int allowed = 1;
1405 
1406     spin_lock_irqsave(&priv->driver_lock, flags);
1407     if (priv->dnld_sent) {
1408         allowed = 0;
1409         lbs_deb_host("dnld_sent was set\n");
1410     }
1411 
1412     /* In-progress command? */
1413     if (priv->cur_cmd) {
1414         allowed = 0;
1415         lbs_deb_host("cur_cmd was set\n");
1416     }
1417 
1418     /* Pending events or command responses? */
1419     if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1420         allowed = 0;
1421         lbs_deb_host("pending events or command responses\n");
1422     }
1423     spin_unlock_irqrestore(&priv->driver_lock, flags);
1424 
1425     if (allowed) {
1426         lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1427         lbs_send_confirmsleep(priv);
1428     } else {
1429         lbs_deb_host("sleep confirm has been delayed\n");
1430     }
1431 }
1432 
1433 
1434 /**
1435  * lbs_set_tpc_cfg - Configures the transmission power control functionality
1436  *
1437  * @priv:   A pointer to &struct lbs_private structure
1438  * @enable: Transmission power control enable
1439  * @p0:     Power level when link quality is good (dBm).
1440  * @p1:     Power level when link quality is fair (dBm).
1441  * @p2:     Power level when link quality is poor (dBm).
1442  * @usesnr: Use Signal to Noise Ratio in TPC
1443  *
1444  * returns: 0 on success
1445  */
1446 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1447         int8_t p2, int usesnr)
1448 {
1449     struct cmd_ds_802_11_tpc_cfg cmd;
1450     int ret;
1451 
1452     memset(&cmd, 0, sizeof(cmd));
1453     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1454     cmd.action = cpu_to_le16(CMD_ACT_SET);
1455     cmd.enable = !!enable;
1456     cmd.usesnr = !!usesnr;
1457     cmd.P0 = p0;
1458     cmd.P1 = p1;
1459     cmd.P2 = p2;
1460 
1461     ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1462 
1463     return ret;
1464 }
1465 
1466 /**
1467  * lbs_set_power_adapt_cfg - Configures the power adaptation settings
1468  *
1469  * @priv:   A pointer to &struct lbs_private structure
1470  * @enable: Power adaptation enable
1471  * @p0:     Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1472  * @p1:     Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1473  * @p2:     Power level for 48 and 54 Mbps (dBm).
1474  *
1475  * returns: 0 on Success
1476  */
1477 
1478 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1479         int8_t p1, int8_t p2)
1480 {
1481     struct cmd_ds_802_11_pa_cfg cmd;
1482     int ret;
1483 
1484     memset(&cmd, 0, sizeof(cmd));
1485     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1486     cmd.action = cpu_to_le16(CMD_ACT_SET);
1487     cmd.enable = !!enable;
1488     cmd.P0 = p0;
1489     cmd.P1 = p1;
1490     cmd.P2 = p2;
1491 
1492     ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1493 
1494     return ret;
1495 }
1496 
1497 
1498 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1499     uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1500     int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1501     unsigned long callback_arg)
1502 {
1503     struct cmd_ctrl_node *cmdnode;
1504 
1505     if (priv->surpriseremoved) {
1506         lbs_deb_host("PREP_CMD: card removed\n");
1507         cmdnode = ERR_PTR(-ENOENT);
1508         goto done;
1509     }
1510 
1511     /* No commands are allowed in Deep Sleep until we toggle the GPIO
1512      * to wake up the card and it has signaled that it's ready.
1513      */
1514     if (!priv->is_auto_deep_sleep_enabled) {
1515         if (priv->is_deep_sleep) {
1516             lbs_deb_cmd("command not allowed in deep sleep\n");
1517             cmdnode = ERR_PTR(-EBUSY);
1518             goto done;
1519         }
1520     }
1521 
1522     cmdnode = lbs_get_free_cmd_node(priv);
1523     if (cmdnode == NULL) {
1524         lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1525 
1526         /* Wake up main thread to execute next command */
1527         wake_up(&priv->waitq);
1528         cmdnode = ERR_PTR(-ENOBUFS);
1529         goto done;
1530     }
1531 
1532     cmdnode->callback = callback;
1533     cmdnode->callback_arg = callback_arg;
1534 
1535     /* Copy the incoming command to the buffer */
1536     memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1537 
1538     /* Set command, clean result, move to buffer */
1539     cmdnode->cmdbuf->command = cpu_to_le16(command);
1540     cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1541     cmdnode->cmdbuf->result  = 0;
1542 
1543     lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1544 
1545     cmdnode->cmdwaitqwoken = 0;
1546     lbs_queue_cmd(priv, cmdnode);
1547     wake_up(&priv->waitq);
1548 
1549  done:
1550     return cmdnode;
1551 }
1552 
1553 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1554     struct cmd_header *in_cmd, int in_cmd_size)
1555 {
1556     __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1557         lbs_cmd_async_callback, 0);
1558 }
1559 
1560 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1561           struct cmd_header *in_cmd, int in_cmd_size,
1562           int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1563           unsigned long callback_arg)
1564 {
1565     struct cmd_ctrl_node *cmdnode;
1566     unsigned long flags;
1567     int ret = 0;
1568 
1569     cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1570                   callback, callback_arg);
1571     if (IS_ERR(cmdnode)) {
1572         ret = PTR_ERR(cmdnode);
1573         goto done;
1574     }
1575 
1576     might_sleep();
1577 
1578     /*
1579      * Be careful with signals here. A signal may be received as the system
1580      * goes into suspend or resume. We do not want this to interrupt the
1581      * command, so we perform an uninterruptible sleep.
1582      */
1583     wait_event(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1584 
1585     spin_lock_irqsave(&priv->driver_lock, flags);
1586     ret = cmdnode->result;
1587     if (ret)
1588         netdev_info(priv->dev, "PREP_CMD: command 0x%04x failed: %d\n",
1589                 command, ret);
1590 
1591     __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1592     spin_unlock_irqrestore(&priv->driver_lock, flags);
1593 
1594 done:
1595     return ret;
1596 }
1597 EXPORT_SYMBOL_GPL(__lbs_cmd);
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