drivers/net/wireless/libertas/fw.c

   1 /**
   2   * This file contains the initialization for FW and HW
   3   */
   4 #include <linux/firmware.h>
   5
   6 #include "host.h"
   7 #include "defs.h"
   8 #include "decl.h"
   9 #include "dev.h"
  10 #include "wext.h"
  11 #include "if_usb.h"
  12
  13 /**
  14  *  @brief This function checks the validity of Boot2/FW image.
  15  *
  16  *  @param data              pointer to image
  17  *         len               image length
  18  *  @return     0 or -1
  19  */
  20 static int check_fwfile_format(u8 *data, u32 totlen)
  21 {
  22         u8  bincmd, exit;
  23         u32 blksize, offset, len;
  24         int ret;
  25
  26         ret = 1;
  27         exit = len = 0;
  28
  29         do {
  30                 bincmd = *data;
  31                 blksize = *(u32*)(data + offsetof(struct fwheader, datalength));
  32                 switch (bincmd) {
  33                 case FW_HAS_DATA_TO_RECV:
  34                         offset = sizeof(struct fwheader) + blksize;
  35                         data += offset;
  36                         len += offset;
  37                         if (len >= totlen)
  38                                 exit = 1;
  39                         break;
  40                 case FW_HAS_LAST_BLOCK:
  41                         exit = 1;
  42                         ret = 0;
  43                         break;
  44                 default:
  45                         exit = 1;
  46                         break;
  47                 }
  48         } while (!exit);
  49
  50         if (ret)
  51                 lbs_pr_err("firmware file format check FAIL\n");
  52         else
  53                 lbs_deb_fw("firmware file format check PASS\n");
  54
  55         return ret;
  56 }
  57
  58 /**
  59  *  @brief This function downloads firmware image, gets
  60  *  HW spec from firmware and set basic parameters to
  61  *  firmware.
  62  *
  63  *  @param priv    A pointer to wlan_private structure
  64  *  @return        0 or -1
  65  */
  66 static int wlan_setup_station_hw(wlan_private * priv, char *fw_name)
  67 {
  68         int ret = -1;
  69         wlan_adapter *adapter = priv->adapter;
  70
  71         lbs_deb_enter(LBS_DEB_FW);
  72
  73         if ((ret = request_firmware(&priv->firmware, fw_name,
  74                                     priv->hotplug_device)) < 0) {
  75                 lbs_pr_err("request_firmware() failed with %#x\n",
  76                        ret);
  77                 lbs_pr_err("firmware %s not found\n", fw_name);
  78                 goto done;
  79         }
  80
  81         if(check_fwfile_format(priv->firmware->data, priv->firmware->size)) {
  82                 release_firmware(priv->firmware);
  83                 goto done;
  84         }
  85
  86         ret = priv->hw_prog_firmware(priv);
  87
  88         release_firmware(priv->firmware);
  89
  90         if (ret) {
  91                 lbs_deb_fw("bootloader in invalid state\n");
  92                 ret = -1;
  93                 goto done;
  94         }
  95
  96         /*
  97          * Read MAC address from HW
  98          */
  99         memset(adapter->current_addr, 0xff, ETH_ALEN);
 100
 101         ret = libertas_prepare_and_send_command(priv, cmd_get_hw_spec,
 102                                     0, cmd_option_waitforrsp, 0, NULL);
 103
 104         if (ret) {
 105                 ret = -1;
 106                 goto done;
 107         }
 108
 109         libertas_set_mac_packet_filter(priv);
 110
 111         /* Get the supported Data rates */
 112         ret = libertas_prepare_and_send_command(priv, cmd_802_11_data_rate,
 113                                     cmd_act_get_tx_rate,
 114                                     cmd_option_waitforrsp, 0, NULL);
 115
 116         if (ret) {
 117                 ret = -1;
 118                 goto done;
 119         }
 120
 121         ret = 0;
 122 done:
 123         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 124         return ret;
 125 }
 126
 127 static int wlan_allocate_adapter(wlan_private * priv)
 128 {
 129         size_t bufsize;
 130         wlan_adapter *adapter = priv->adapter;
 131
 132         /* Allocate buffer to store the BSSID list */
 133         bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
 134         adapter->networks = kzalloc(bufsize, GFP_KERNEL);
 135         if (!adapter->networks) {
 136                 lbs_pr_err("Out of memory allocating beacons\n");
 137                 libertas_free_adapter(priv);
 138                 return -ENOMEM;
 139         }
 140
 141         /* Allocate the command buffers */
 142         libertas_allocate_cmd_buffer(priv);
 143
 144         memset(&adapter->libertas_ps_confirm_sleep, 0, sizeof(struct PS_CMD_ConfirmSleep));
 145         adapter->libertas_ps_confirm_sleep.seqnum = cpu_to_le16(++adapter->seqnum);
 146         adapter->libertas_ps_confirm_sleep.command =
 147             cpu_to_le16(cmd_802_11_ps_mode);
 148         adapter->libertas_ps_confirm_sleep.size =
 149             cpu_to_le16(sizeof(struct PS_CMD_ConfirmSleep));
 150         adapter->libertas_ps_confirm_sleep.result = 0;
 151         adapter->libertas_ps_confirm_sleep.action =
 152             cpu_to_le16(cmd_subcmd_sleep_confirmed);
 153
 154         return 0;
 155 }
 156
 157 static void wlan_init_adapter(wlan_private * priv)
 158 {
 159         wlan_adapter *adapter = priv->adapter;
 160         int i;
 161
 162         adapter->scanprobes = 0;
 163
 164         adapter->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
 165         adapter->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
 166
 167         /* ATIM params */
 168         adapter->atimwindow = 0;
 169
 170         adapter->connect_status = libertas_disconnected;
 171         memset(adapter->current_addr, 0xff, ETH_ALEN);
 172
 173         /* scan type */
 174         adapter->scantype = cmd_scan_type_active;
 175
 176         /* scan mode */
 177         adapter->scanmode = cmd_bss_type_any;
 178
 179         /* 802.11 specific */
 180         adapter->secinfo.wep_enabled = 0;
 181         for (i = 0; i < sizeof(adapter->wep_keys) / sizeof(adapter->wep_keys[0]);
 182              i++)
 183                 memset(&adapter->wep_keys[i], 0, sizeof(struct WLAN_802_11_KEY));
 184         adapter->wep_tx_keyidx = 0;
 185         adapter->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
 186         adapter->mode = IW_MODE_INFRA;
 187
 188         adapter->assoc_req = NULL;
 189
 190         /* Initialize scan result lists */
 191         INIT_LIST_HEAD(&adapter->network_free_list);
 192         INIT_LIST_HEAD(&adapter->network_list);
 193         for (i = 0; i < MAX_NETWORK_COUNT; i++) {
 194                 list_add_tail(&adapter->networks[i].list,
 195                               &adapter->network_free_list);
 196         }
 197
 198         adapter->pattemptedbssdesc = NULL;
 199         mutex_init(&adapter->lock);
 200
 201         adapter->prescan = 1;
 202
 203         memset(&adapter->curbssparams, 0, sizeof(adapter->curbssparams));
 204
 205         /* PnP and power profile */
 206         adapter->surpriseremoved = 0;
 207
 208         adapter->currentpacketfilter =
 209             cmd_act_mac_rx_on | cmd_act_mac_tx_on;
 210
 211         adapter->radioon = RADIO_ON;
 212         adapter->txantenna = RF_ANTENNA_2;
 213         adapter->rxantenna = RF_ANTENNA_AUTO;
 214
 215         adapter->is_datarate_auto = 1;
 216         adapter->beaconperiod = MRVDRV_BEACON_INTERVAL;
 217
 218         // set default value of capinfo.
 219 #define SHORT_PREAMBLE_ALLOWED          1
 220         memset(&adapter->capinfo, 0, sizeof(adapter->capinfo));
 221         adapter->capinfo.shortpreamble = SHORT_PREAMBLE_ALLOWED;
 222
 223         adapter->adhocchannel = DEFAULT_AD_HOC_CHANNEL;
 224
 225         adapter->psmode = wlan802_11powermodecam;
 226         adapter->multipledtim = MRVDRV_DEFAULT_MULTIPLE_DTIM;
 227
 228         adapter->listeninterval = MRVDRV_DEFAULT_LISTEN_INTERVAL;
 229
 230         adapter->psstate = PS_STATE_FULL_POWER;
 231         adapter->needtowakeup = 0;
 232         adapter->locallisteninterval = 0;       /* default value in firmware will be used */
 233
 234         adapter->datarate = 0;  // Initially indicate the rate as auto
 235
 236         adapter->adhoc_grate_enabled = 0;
 237
 238         adapter->intcounter = 0;
 239
 240         adapter->currenttxskb = NULL;
 241         adapter->pkttxctrl = 0;
 242
 243         memset(&adapter->tx_queue_ps, 0, NR_TX_QUEUE*sizeof(struct sk_buff*));
 244         adapter->tx_queue_idx = 0;
 245         spin_lock_init(&adapter->txqueue_lock);
 246
 247         return;
 248 }
 249
 250 static void command_timer_fn(unsigned long data);
 251
 252 int libertas_init_fw(wlan_private * priv, char *fw_name)
 253 {
 254         int ret = -1;
 255         wlan_adapter *adapter = priv->adapter;
 256
 257         lbs_deb_enter(LBS_DEB_FW);
 258
 259         /* Allocate adapter structure */
 260         if ((ret = wlan_allocate_adapter(priv)) != 0)
 261                 goto done;
 262
 263         /* init adapter structure */
 264         wlan_init_adapter(priv);
 265
 266         /* init timer etc. */
 267         setup_timer(&adapter->command_timer, command_timer_fn,
 268                         (unsigned long)priv);
 269
 270         /* download fimrware etc. */
 271         if ((ret = wlan_setup_station_hw(priv, fw_name)) != 0) {
 272                 del_timer_sync(&adapter->command_timer);
 273                 goto done;
 274         }
 275
 276         /* init 802.11d */
 277         libertas_init_11d(priv);
 278
 279         ret = 0;
 280 done:
 281         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 282         return ret;
 283 }
 284
 285 void libertas_free_adapter(wlan_private * priv)
 286 {
 287         wlan_adapter *adapter = priv->adapter;
 288
 289         if (!adapter) {
 290                 lbs_deb_fw("why double free adapter?\n");
 291                 return;
 292         }
 293
 294         lbs_deb_fw("free command buffer\n");
 295         libertas_free_cmd_buffer(priv);
 296
 297         lbs_deb_fw("free command_timer\n");
 298         del_timer(&adapter->command_timer);
 299
 300         lbs_deb_fw("free scan results table\n");
 301         kfree(adapter->networks);
 302         adapter->networks = NULL;
 303
 304         /* Free the adapter object itself */
 305         lbs_deb_fw("free adapter\n");
 306         kfree(adapter);
 307         priv->adapter = NULL;
 308 }
 309
 310 /**
 311  *  This function handles the timeout of command sending.
 312  *  It will re-send the same command again.
 313  */
 314 static void command_timer_fn(unsigned long data)
 315 {
 316         wlan_private *priv = (wlan_private *)data;
 317         wlan_adapter *adapter = priv->adapter;
 318         struct cmd_ctrl_node *ptempnode;
 319         struct cmd_ds_command *cmd;
 320         unsigned long flags;
 321
 322         ptempnode = adapter->cur_cmd;
 323         if (ptempnode == NULL) {
 324                 lbs_deb_fw("ptempnode empty\n");
 325                 return;
 326         }
 327
 328         cmd = (struct cmd_ds_command *)ptempnode->bufvirtualaddr;
 329         if (!cmd) {
 330                 lbs_deb_fw("cmd is NULL\n");
 331                 return;
 332         }
 333
 334         lbs_deb_fw("command_timer_fn fired, cmd %x\n", cmd->command);
 335
 336         if (!adapter->fw_ready)
 337                 return;
 338
 339         spin_lock_irqsave(&adapter->driver_lock, flags);
 340         adapter->cur_cmd = NULL;
 341         spin_unlock_irqrestore(&adapter->driver_lock, flags);
 342
 343         lbs_deb_fw("re-sending same command because of timeout\n");
 344         libertas_queue_cmd(adapter, ptempnode, 0);
 345
 346         wake_up_interruptible(&priv->mainthread.waitq);
 347
 348         return;
 349 }