2 * Intel Wireless Multicomm 3200 WiFi driver
4 * Copyright (C) 2009 Intel Corporation. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
16 * * Neither the name of Intel Corporation nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * Intel Corporation <ilw@linux.intel.com>
34 * Samuel Ortiz <samuel.ortiz@intel.com>
35 * Zhu Yi <yi.zhu@intel.com>
39 #include <linux/kernel.h>
40 #include <linux/netdevice.h>
41 #include <linux/ieee80211.h>
42 #include <linux/wireless.h>
53 static struct iwm_conf def_iwm_conf = {
55 .sdio_ior_timeout = 5000,
56 .init_calib_map = BIT(PHY_CALIBRATE_DC_CMD) |
57 BIT(PHY_CALIBRATE_LO_CMD) |
58 BIT(PHY_CALIBRATE_TX_IQ_CMD) |
59 BIT(PHY_CALIBRATE_RX_IQ_CMD),
60 .periodic_calib_map = BIT(PHY_CALIBRATE_DC_CMD) |
61 BIT(PHY_CALIBRATE_LO_CMD) |
62 BIT(PHY_CALIBRATE_TX_IQ_CMD) |
63 BIT(PHY_CALIBRATE_RX_IQ_CMD) |
64 BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
65 .reset_on_fatal_err = 1,
67 .wimax_not_present = 0,
69 .mode = UMAC_MODE_BSS,
71 /* UMAC configuration */
73 .frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD,
74 .rts_threshold = IEEE80211_MAX_RTS_THRESHOLD,
79 .wireless_mode = WIRELESS_MODE_11A | WIRELESS_MODE_11G,
80 .coexist_mode = COEX_MODE_CM,
83 .ibss_band = UMAC_BAND_2GHZ,
86 .mac_addr = {0x00, 0x02, 0xb3, 0x01, 0x02, 0x03},
89 static int modparam_reset;
90 module_param_named(reset, modparam_reset, bool, 0644);
91 MODULE_PARM_DESC(reset, "reset on firmware errors (default 0 [not reset])");
93 int iwm_mode_to_nl80211_iftype(int mode)
97 return NL80211_IFTYPE_STATION;
99 return NL80211_IFTYPE_ADHOC;
101 return NL80211_IFTYPE_UNSPECIFIED;
107 static void iwm_statistics_request(struct work_struct *work)
109 struct iwm_priv *iwm =
110 container_of(work, struct iwm_priv, stats_request.work);
112 iwm_send_umac_stats_req(iwm, 0);
115 int __iwm_up(struct iwm_priv *iwm);
116 int __iwm_down(struct iwm_priv *iwm);
118 static void iwm_reset_worker(struct work_struct *work)
120 struct iwm_priv *iwm;
121 struct iwm_umac_profile *profile = NULL;
122 int uninitialized_var(ret), retry = 0;
124 iwm = container_of(work, struct iwm_priv, reset_worker);
127 * XXX: The iwm->mutex is introduced purely for this reset work,
128 * because the other users for iwm_up and iwm_down are only netdev
129 * ndo_open and ndo_stop which are already protected by rtnl.
130 * Please remove iwm->mutex together if iwm_reset_worker() is not
131 * required in the future.
133 if (!mutex_trylock(&iwm->mutex)) {
134 IWM_WARN(iwm, "We are in the middle of interface bringing "
135 "UP/DOWN. Skip driver resetting.\n");
139 if (iwm->umac_profile_active) {
140 profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
142 memcpy(profile, iwm->umac_profile, sizeof(*profile));
144 IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
149 while (retry++ < 3) {
154 schedule_timeout_uninterruptible(10 * HZ);
158 IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);
165 IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
166 memcpy(iwm->umac_profile, profile, sizeof(*profile));
167 iwm_send_mlme_profile(iwm);
172 mutex_unlock(&iwm->mutex);
175 static void iwm_watchdog(unsigned long data)
177 struct iwm_priv *iwm = (struct iwm_priv *)data;
179 IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");
182 schedule_work(&iwm->reset_worker);
185 int iwm_priv_init(struct iwm_priv *iwm)
191 INIT_LIST_HEAD(&iwm->pending_notif);
192 init_waitqueue_head(&iwm->notif_queue);
193 init_waitqueue_head(&iwm->nonwifi_queue);
194 init_waitqueue_head(&iwm->wifi_ntfy_queue);
195 init_waitqueue_head(&iwm->mlme_queue);
196 memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
197 spin_lock_init(&iwm->tx_credit.lock);
198 INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
199 INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
200 iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
201 iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
202 spin_lock_init(&iwm->cmd_lock);
204 INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
205 INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
206 INIT_LIST_HEAD(&iwm->bss_list);
208 skb_queue_head_init(&iwm->rx_list);
209 INIT_LIST_HEAD(&iwm->rx_tickets);
210 for (i = 0; i < IWM_RX_ID_HASH; i++)
211 INIT_LIST_HEAD(&iwm->rx_packets[i]);
213 INIT_WORK(&iwm->rx_worker, iwm_rx_worker);
215 iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
219 for (i = 0; i < IWM_TX_QUEUES; i++) {
220 INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
221 snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
223 iwm->txq[i].wq = create_singlethread_workqueue(name);
227 skb_queue_head_init(&iwm->txq[i].queue);
230 for (i = 0; i < IWM_NUM_KEYS; i++)
231 memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
233 iwm->default_key = NULL;
235 init_timer(&iwm->watchdog);
236 iwm->watchdog.function = iwm_watchdog;
237 iwm->watchdog.data = (unsigned long)iwm;
238 mutex_init(&iwm->mutex);
243 void iwm_priv_deinit(struct iwm_priv *iwm)
247 for (i = 0; i < IWM_TX_QUEUES; i++)
248 destroy_workqueue(iwm->txq[i].wq);
250 destroy_workqueue(iwm->rx_wq);
254 * We reset all the structures, and we reset the UMAC.
255 * After calling this routine, you're expected to reload
258 void iwm_reset(struct iwm_priv *iwm)
260 struct iwm_notif *notif, *next;
262 if (test_bit(IWM_STATUS_READY, &iwm->status))
263 iwm_target_reset(iwm);
268 list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
269 list_del(¬if->pending);
276 flush_workqueue(iwm->rx_wq);
284 * We're faced with the following issue: Any host command can
285 * have an answer or not, and if there's an answer to expect,
286 * it can be treated synchronously or asynchronously.
287 * To work around the synchronous answer case, we implemented
288 * our notification mechanism.
289 * When a code path needs to wait for a command response
290 * synchronously, it calls notif_handle(), which waits for the
291 * right notification to show up, and then process it. Before
292 * starting to wait, it registered as a waiter for this specific
293 * answer (by toggling a bit in on of the handler_map), so that
294 * the rx code knows that it needs to send a notification to the
295 * waiting processes. It does so by calling iwm_notif_send(),
296 * which adds the notification to the pending notifications list,
297 * and then wakes the waiting processes up.
299 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
300 u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
302 struct iwm_notif *notif;
304 notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
306 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
310 INIT_LIST_HEAD(¬if->pending);
312 notif->cmd_id = cmd_id;
314 notif->buf = kzalloc(buf_size, GFP_KERNEL);
316 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
320 notif->buf_size = buf_size;
321 memcpy(notif->buf, buf, buf_size);
322 list_add_tail(¬if->pending, &iwm->pending_notif);
324 wake_up_interruptible(&iwm->notif_queue);
329 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
332 struct iwm_notif *notif, *next;
334 list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
335 if ((notif->cmd_id == cmd) && (notif->src == source)) {
336 list_del(¬if->pending);
344 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
345 u8 source, long timeout)
348 struct iwm_notif *notif;
349 unsigned long *map = NULL;
353 map = &iwm->lmac_handler_map[0];
356 map = &iwm->umac_handler_map[0];
359 map = &iwm->udma_handler_map[0];
365 ret = wait_event_interruptible_timeout(iwm->notif_queue,
366 ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
376 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
379 struct iwm_notif *notif;
381 notif = iwm_notif_wait(iwm, cmd, source, timeout);
385 ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
392 static int iwm_config_boot_params(struct iwm_priv *iwm)
394 struct iwm_udma_nonwifi_cmd target_cmd;
397 /* check Wimax is off and config debug monitor */
398 if (iwm->conf.wimax_not_present) {
400 u32 addr1 = 0x606BE258;
404 u32 addr2 = 0x606BE100;
407 u32 addr3 = 0x606BEC00;
410 target_cmd.handle_by_hw = 0;
413 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
414 target_cmd.addr = cpu_to_le32(addr1);
415 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
418 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
420 IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
424 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
425 target_cmd.addr = cpu_to_le32(addr2);
426 target_cmd.op1_sz = cpu_to_le32(data2_set);
427 target_cmd.op2 = cpu_to_le32(data2_clr);
429 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
431 IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
435 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
436 target_cmd.addr = cpu_to_le32(addr3);
437 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
440 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
442 IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
450 void iwm_init_default_profile(struct iwm_priv *iwm,
451 struct iwm_umac_profile *profile)
453 memset(profile, 0, sizeof(struct iwm_umac_profile));
455 profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
456 profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
457 profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
458 profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
460 if (iwm->conf.enable_qos)
461 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
463 profile->wireless_mode = iwm->conf.wireless_mode;
464 profile->mode = cpu_to_le32(iwm->conf.mode);
466 profile->ibss.atim = 0;
467 profile->ibss.beacon_interval = 100;
468 profile->ibss.join_only = 0;
469 profile->ibss.band = iwm->conf.ibss_band;
470 profile->ibss.channel = iwm->conf.ibss_channel;
473 void iwm_link_on(struct iwm_priv *iwm)
475 netif_carrier_on(iwm_to_ndev(iwm));
476 netif_tx_wake_all_queues(iwm_to_ndev(iwm));
478 iwm_send_umac_stats_req(iwm, 0);
481 void iwm_link_off(struct iwm_priv *iwm)
483 struct iw_statistics *wstats = &iwm->wstats;
486 netif_tx_stop_all_queues(iwm_to_ndev(iwm));
487 netif_carrier_off(iwm_to_ndev(iwm));
489 for (i = 0; i < IWM_TX_QUEUES; i++) {
490 skb_queue_purge(&iwm->txq[i].queue);
492 iwm->txq[i].concat_count = 0;
493 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
495 flush_workqueue(iwm->txq[i].wq);
500 cancel_delayed_work_sync(&iwm->stats_request);
501 memset(wstats, 0, sizeof(struct iw_statistics));
502 wstats->qual.updated = IW_QUAL_ALL_INVALID;
504 del_timer_sync(&iwm->watchdog);
507 static void iwm_bss_list_clean(struct iwm_priv *iwm)
509 struct iwm_bss_info *bss, *next;
511 list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
512 list_del(&bss->node);
518 static int iwm_channels_init(struct iwm_priv *iwm)
522 #ifdef CONFIG_IWM_B0_HW_SUPPORT
523 if (iwm->conf.hw_b0) {
524 IWM_INFO(iwm, "Workaround EEPROM channels for B0 hardware\n");
529 ret = iwm_send_umac_channel_list(iwm);
531 IWM_ERR(iwm, "Send channel list failed\n");
535 ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
536 IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
538 IWM_ERR(iwm, "Didn't get a channel list notification\n");
545 int __iwm_up(struct iwm_priv *iwm)
548 struct iwm_notif *notif_reboot, *notif_ack = NULL;
550 ret = iwm_bus_enable(iwm);
552 IWM_ERR(iwm, "Couldn't enable function\n");
556 iwm_rx_setup_handlers(iwm);
558 /* Wait for initial BARKER_REBOOT from hardware */
559 notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
560 IWM_SRC_UDMA, 2 * HZ);
562 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
566 /* We send the barker back */
567 ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
569 IWM_ERR(iwm, "REBOOT barker response failed\n");
574 kfree(notif_reboot->buf);
577 /* Wait for ACK_BARKER from hardware */
578 notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
579 IWM_SRC_UDMA, 2 * HZ);
581 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
585 kfree(notif_ack->buf);
588 /* We start to config static boot parameters */
589 ret = iwm_config_boot_params(iwm);
591 IWM_ERR(iwm, "Config boot parameters failed\n");
595 ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
597 IWM_ERR(iwm, "MAC reading failed\n");
601 /* We can load the FWs */
602 ret = iwm_load_fw(iwm);
604 IWM_ERR(iwm, "FW loading failed\n");
608 /* We configure the UMAC and enable the wifi module */
609 ret = iwm_send_umac_config(iwm,
610 cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
611 cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
612 cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
614 IWM_ERR(iwm, "UMAC config failed\n");
618 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
619 IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
621 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
625 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
626 UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
627 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
629 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
630 IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
632 IWM_ERR(iwm, "Didn't get a core status notification\n");
636 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
637 UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
638 IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
642 IWM_INFO(iwm, "All cores enabled\n");
646 iwm->umac_profile = kmalloc(sizeof(struct iwm_umac_profile),
648 if (!iwm->umac_profile) {
649 IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
653 iwm_init_default_profile(iwm, iwm->umac_profile);
655 ret = iwm_channels_init(iwm);
657 IWM_ERR(iwm, "Couldn't init channels\n");
661 /* Set the READY bit to indicate interface is brought up successfully */
662 set_bit(IWM_STATUS_READY, &iwm->status);
667 kfree(iwm->umac_profile);
668 iwm->umac_profile = NULL;
671 iwm_eeprom_exit(iwm);
674 ret = iwm_bus_disable(iwm);
676 IWM_ERR(iwm, "Couldn't disable function\n");
681 int iwm_up(struct iwm_priv *iwm)
685 mutex_lock(&iwm->mutex);
687 mutex_unlock(&iwm->mutex);
692 int __iwm_down(struct iwm_priv *iwm)
696 /* The interface is already down */
697 if (!test_bit(IWM_STATUS_READY, &iwm->status))
700 if (iwm->scan_request) {
701 cfg80211_scan_done(iwm->scan_request, true);
702 iwm->scan_request = NULL;
705 clear_bit(IWM_STATUS_READY, &iwm->status);
707 iwm_eeprom_exit(iwm);
708 kfree(iwm->umac_profile);
709 iwm->umac_profile = NULL;
710 iwm_bss_list_clean(iwm);
712 iwm->default_key = NULL;
713 iwm->core_enabled = 0;
715 ret = iwm_bus_disable(iwm);
717 IWM_ERR(iwm, "Couldn't disable function\n");
724 int iwm_down(struct iwm_priv *iwm)
728 mutex_lock(&iwm->mutex);
729 ret = __iwm_down(iwm);
730 mutex_unlock(&iwm->mutex);