drivers/net/wireless/libertas/fw.c

   1 /**
   2   * This file contains the initialization for FW and HW
   3   */
   4 #include <linux/module.h>
   5 #include <linux/moduleparam.h>
   6
   7 #include <linux/vmalloc.h>
   8 #include <linux/firmware.h>
   9 #include <linux/version.h>
  10
  11 #include "host.h"
  12 #include "sbi.h"
  13 #include "defs.h"
  14 #include "decl.h"
  15 #include "dev.h"
  16 #include "fw.h"
  17 #include "wext.h"
  18 #include "if_usb.h"
  19
  20 char *libertas_fw_name = NULL;
  21 module_param_named(fw_name, libertas_fw_name, charp, 0644);
  22
  23 unsigned int libertas_debug = 0;
  24 module_param(libertas_debug, int, 0);
  25
  26 /**
  27  *  @brief This function checks the validity of Boot2/FW image.
  28  *
  29  *  @param data              pointer to image
  30  *         len               image length
  31  *  @return     0 or -1
  32  */
  33 static int check_fwfile_format(u8 *data, u32 totlen)
  34 {
  35         u8  bincmd, exit;
  36         u32 blksize, offset, len;
  37         int ret;
  38
  39         ret = 1;
  40         exit = len = 0;
  41
  42         do {
  43                 bincmd = *data;
  44                 blksize = *(u32*)(data + offsetof(struct fwheader, datalength));
  45                 switch (bincmd) {
  46                 case FW_HAS_DATA_TO_RECV:
  47                         offset = sizeof(struct fwheader) + blksize;
  48                         data += offset;
  49                         len += offset;
  50                         if (len >= totlen)
  51                                 exit = 1;
  52                         break;
  53                 case FW_HAS_LAST_BLOCK:
  54                         exit = 1;
  55                         ret = 0;
  56                         break;
  57                 default:
  58                         exit = 1;
  59                         break;
  60                 }
  61         } while (!exit);
  62
  63         if (ret)
  64                 lbs_pr_err("bin file format check FAIL...\n");
  65         else
  66                 lbs_pr_debug(1, "bin file format check PASS...\n");
  67
  68         return ret;
  69 }
  70
  71 /**
  72  *  @brief This function downloads firmware image, gets
  73  *  HW spec from firmware and set basic parameters to
  74  *  firmware.
  75  *
  76  *  @param priv    A pointer to wlan_private structure
  77  *  @return        0 or -1
  78  */
  79 static int wlan_setup_station_hw(wlan_private * priv)
  80 {
  81         int ret = -1;
  82         wlan_adapter *adapter = priv->adapter;
  83
  84         ENTER();
  85
  86         if ((ret = request_firmware(&priv->firmware, libertas_fw_name,
  87                                     priv->hotplug_device)) < 0) {
  88                 lbs_pr_err("request_firmware() failed, error code = %#x\n",
  89                        ret);
  90                 lbs_pr_err("%s not found in /lib/firmware\n", libertas_fw_name);
  91                 goto done;
  92         }
  93
  94         if(check_fwfile_format(priv->firmware->data, priv->firmware->size)) {
  95                 release_firmware(priv->firmware);
  96                 goto done;
  97         }
  98
  99         ret = libertas_sbi_prog_firmware(priv);
 100
 101         release_firmware(priv->firmware);
 102
 103         if (ret) {
 104                 lbs_pr_debug(1, "Bootloader in invalid state!\n");
 105                 ret = -1;
 106                 goto done;
 107         }
 108
 109         /*
 110          * Read MAC address from HW
 111          */
 112         memset(adapter->current_addr, 0xff, ETH_ALEN);
 113
 114         ret = libertas_prepare_and_send_command(priv, cmd_get_hw_spec,
 115                                     0, cmd_option_waitforrsp, 0, NULL);
 116
 117         if (ret) {
 118                 ret = -1;
 119                 goto done;
 120         }
 121
 122         libertas_set_mac_packet_filter(priv);
 123
 124         /* Get the supported Data rates */
 125         ret = libertas_prepare_and_send_command(priv, cmd_802_11_data_rate,
 126                                     cmd_act_get_tx_rate,
 127                                     cmd_option_waitforrsp, 0, NULL);
 128
 129         if (ret) {
 130                 ret = -1;
 131                 goto done;
 132         }
 133
 134         ret = 0;
 135 done:
 136         LEAVE();
 137
 138         return (ret);
 139 }
 140
 141 static int wlan_allocate_adapter(wlan_private * priv)
 142 {
 143         u32 ulbufsize;
 144         wlan_adapter *adapter = priv->adapter;
 145
 146         struct bss_descriptor *ptempscantable;
 147
 148         /* Allocate buffer to store the BSSID list */
 149         ulbufsize = sizeof(struct bss_descriptor) * MRVDRV_MAX_BSSID_LIST;
 150         if (!(ptempscantable = kmalloc(ulbufsize, GFP_KERNEL))) {
 151                 libertas_free_adapter(priv);
 152                 return -1;
 153         }
 154
 155         adapter->scantable = ptempscantable;
 156         memset(adapter->scantable, 0, ulbufsize);
 157
 158         /* Allocate the command buffers */
 159         libertas_allocate_cmd_buffer(priv);
 160
 161         memset(&adapter->libertas_ps_confirm_sleep, 0, sizeof(struct PS_CMD_ConfirmSleep));
 162         adapter->libertas_ps_confirm_sleep.seqnum = cpu_to_le16(++adapter->seqnum);
 163         adapter->libertas_ps_confirm_sleep.command =
 164             cpu_to_le16(cmd_802_11_ps_mode);
 165         adapter->libertas_ps_confirm_sleep.size =
 166             cpu_to_le16(sizeof(struct PS_CMD_ConfirmSleep));
 167         adapter->libertas_ps_confirm_sleep.result = 0;
 168         adapter->libertas_ps_confirm_sleep.action =
 169             cpu_to_le16(cmd_subcmd_sleep_confirmed);
 170
 171         return 0;
 172 }
 173
 174 static void wlan_init_adapter(wlan_private * priv)
 175 {
 176         wlan_adapter *adapter = priv->adapter;
 177         int i;
 178
 179         adapter->scanprobes = 0;
 180
 181         adapter->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
 182         adapter->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
 183
 184         /* ATIM params */
 185         adapter->atimwindow = 0;
 186
 187         adapter->connect_status = libertas_disconnected;
 188         memset(adapter->current_addr, 0xff, ETH_ALEN);
 189
 190         /* scan type */
 191         adapter->scantype = cmd_scan_type_active;
 192
 193         /* scan mode */
 194         adapter->scanmode = cmd_bss_type_any;
 195
 196         /* 802.11 specific */
 197         adapter->secinfo.wep_enabled = 0;
 198         for (i = 0; i < sizeof(adapter->wep_keys) / sizeof(adapter->wep_keys[0]);
 199              i++)
 200                 memset(&adapter->wep_keys[i], 0, sizeof(struct WLAN_802_11_KEY));
 201         adapter->wep_tx_keyidx = 0;
 202         adapter->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
 203         adapter->mode = IW_MODE_INFRA;
 204
 205         adapter->assoc_req = NULL;
 206
 207         adapter->numinscantable = 0;
 208         adapter->pattemptedbssdesc = NULL;
 209         mutex_init(&adapter->lock);
 210
 211         adapter->prescan = 1;
 212
 213         memset(&adapter->curbssparams, 0, sizeof(adapter->curbssparams));
 214
 215         /* PnP and power profile */
 216         adapter->surpriseremoved = 0;
 217
 218         adapter->currentpacketfilter =
 219             cmd_act_mac_rx_on | cmd_act_mac_tx_on;
 220
 221         adapter->radioon = RADIO_ON;
 222         adapter->txantenna = RF_ANTENNA_2;
 223         adapter->rxantenna = RF_ANTENNA_AUTO;
 224
 225         adapter->is_datarate_auto = 1;
 226         adapter->beaconperiod = MRVDRV_BEACON_INTERVAL;
 227
 228         // set default value of capinfo.
 229 #define SHORT_PREAMBLE_ALLOWED          1
 230         memset(&adapter->capinfo, 0, sizeof(adapter->capinfo));
 231         adapter->capinfo.shortpreamble = SHORT_PREAMBLE_ALLOWED;
 232
 233         adapter->adhocchannel = DEFAULT_AD_HOC_CHANNEL;
 234
 235         adapter->psmode = wlan802_11powermodecam;
 236         adapter->multipledtim = MRVDRV_DEFAULT_MULTIPLE_DTIM;
 237
 238         adapter->listeninterval = MRVDRV_DEFAULT_LISTEN_INTERVAL;
 239
 240         adapter->psstate = PS_STATE_FULL_POWER;
 241         adapter->needtowakeup = 0;
 242         adapter->locallisteninterval = 0;       /* default value in firmware will be used */
 243
 244         adapter->datarate = 0;  // Initially indicate the rate as auto
 245
 246         adapter->adhoc_grate_enabled = 0;
 247
 248         adapter->intcounter = 0;
 249
 250         adapter->currenttxskb = NULL;
 251         adapter->pkttxctrl = 0;
 252
 253         memset(&adapter->tx_queue_ps, 0, NR_TX_QUEUE*sizeof(struct sk_buff*));
 254         adapter->tx_queue_idx = 0;
 255         spin_lock_init(&adapter->txqueue_lock);
 256
 257         return;
 258 }
 259
 260 static void command_timer_fn(unsigned long data);
 261
 262 int libertas_init_fw(wlan_private * priv)
 263 {
 264         int ret = -1;
 265         wlan_adapter *adapter = priv->adapter;
 266
 267         ENTER();
 268
 269         /* Allocate adapter structure */
 270         if ((ret = wlan_allocate_adapter(priv)) != 0)
 271                 goto done;
 272
 273         /* init adapter structure */
 274         wlan_init_adapter(priv);
 275
 276         /* init timer etc. */
 277         setup_timer(&adapter->command_timer, command_timer_fn,
 278                         (unsigned long)priv);
 279
 280         /* download fimrware etc. */
 281         if ((ret = wlan_setup_station_hw(priv)) != 0) {
 282                 del_timer_sync(&adapter->command_timer);
 283                 goto done;
 284         }
 285
 286         /* init 802.11d */
 287         libertas_init_11d(priv);
 288
 289         ret = 0;
 290 done:
 291         LEAVE();
 292         return ret;
 293 }
 294
 295 void libertas_free_adapter(wlan_private * priv)
 296 {
 297         wlan_adapter *adapter = priv->adapter;
 298
 299         if (!adapter) {
 300                 lbs_pr_debug(1, "Why double free adapter?:)\n");
 301                 return;
 302         }
 303
 304         lbs_pr_debug(1, "Free command buffer\n");
 305         libertas_free_cmd_buffer(priv);
 306
 307         lbs_pr_debug(1, "Free commandTimer\n");
 308         del_timer(&adapter->command_timer);
 309
 310         lbs_pr_debug(1, "Free scantable\n");
 311         if (adapter->scantable) {
 312                 kfree(adapter->scantable);
 313                 adapter->scantable = NULL;
 314         }
 315
 316         lbs_pr_debug(1, "Free adapter\n");
 317
 318         /* Free the adapter object itself */
 319         kfree(adapter);
 320         priv->adapter = NULL;
 321 }
 322
 323 /**
 324  *  This function handles the timeout of command sending.
 325  *  It will re-send the same command again.
 326  */
 327 static void command_timer_fn(unsigned long data)
 328 {
 329         wlan_private *priv = (wlan_private *)data;
 330         wlan_adapter *adapter = priv->adapter;
 331         struct cmd_ctrl_node *ptempnode;
 332         struct cmd_ds_command *cmd;
 333         unsigned long flags;
 334
 335         ptempnode = adapter->cur_cmd;
 336         if (ptempnode == NULL) {
 337                 lbs_pr_debug(1, "PTempnode Empty\n");
 338                 return;
 339         }
 340
 341         cmd = (struct cmd_ds_command *)ptempnode->bufvirtualaddr;
 342         if (!cmd) {
 343                 lbs_pr_debug(1, "cmd is NULL\n");
 344                 return;
 345         }
 346
 347         lbs_pr_info("command_timer_fn fired (%x)\n", cmd->command);
 348
 349         if (!adapter->fw_ready)
 350                 return;
 351
 352         spin_lock_irqsave(&adapter->driver_lock, flags);
 353         adapter->cur_cmd = NULL;
 354         spin_unlock_irqrestore(&adapter->driver_lock, flags);
 355
 356         lbs_pr_debug(1, "Re-sending same command as it timeout...!\n");
 357         libertas_queue_cmd(adapter, ptempnode, 0);
 358
 359         wake_up_interruptible(&priv->mainthread.waitq);
 360
 361         return;
 362 }