2 * Copyright (c) 2012 Qualcomm Atheros, Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <linux/kernel.h>
18 #include <linux/netdevice.h>
19 #include <linux/sched.h>
20 #include <linux/ieee80211.h>
21 #include <linux/wireless.h>
22 #include <linux/slab.h>
23 #include <linux/moduleparam.h>
24 #include <linux/if_arp.h>
29 * Due to a hardware issue,
30 * one has to read/write to/from NIC in 32-bit chunks;
31 * regular memcpy_fromio and siblings will
32 * not work on 64-bit platform - it uses 64-bit transactions
34 * Force 32-bit transactions to enable NIC on 64-bit platforms
36 * To avoid byte swap on big endian host, __raw_{read|write}l
37 * should be used - {read|write}l would swap bytes to provide
38 * little endian on PCI value in host endianness.
40 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
44 const volatile u32 __iomem *s = src;
46 /* size_t is unsigned, if (count%4 != 0) it will wrap */
47 for (count += 4; count > 4; count -= 4)
48 *d++ = __raw_readl(s++);
51 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
54 volatile u32 __iomem *d = dst;
57 for (count += 4; count > 4; count -= 4)
58 __raw_writel(*s++, d++);
61 static void _wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
64 struct net_device *ndev = wil_to_ndev(wil);
65 struct wireless_dev *wdev = wil->wdev;
67 wil_dbg_misc(wil, "%s()\n", __func__);
70 clear_bit(wil_status_fwconnected, &wil->status);
72 switch (wdev->sme_state) {
73 case CFG80211_SME_CONNECTED:
74 cfg80211_disconnected(ndev, WLAN_STATUS_UNSPECIFIED_FAILURE,
77 case CFG80211_SME_CONNECTING:
78 cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
79 WLAN_STATUS_UNSPECIFIED_FAILURE,
86 for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++)
87 wil_vring_fini_tx(wil, i);
89 clear_bit(wil_status_dontscan, &wil->status);
92 static void wil_disconnect_worker(struct work_struct *work)
94 struct wil6210_priv *wil = container_of(work,
95 struct wil6210_priv, disconnect_worker);
97 _wil6210_disconnect(wil, NULL);
100 static void wil_connect_timer_fn(ulong x)
102 struct wil6210_priv *wil = (void *)x;
104 wil_dbg_misc(wil, "Connect timeout\n");
106 /* reschedule to thread context - disconnect won't
107 * run from atomic context
109 schedule_work(&wil->disconnect_worker);
112 static void wil_cache_mbox_regs(struct wil6210_priv *wil)
114 /* make shadow copy of registers that should not change on run time */
115 wil_memcpy_fromio_32(&wil->mbox_ctl, wil->csr + HOST_MBOX,
116 sizeof(struct wil6210_mbox_ctl));
117 wil_mbox_ring_le2cpus(&wil->mbox_ctl.rx);
118 wil_mbox_ring_le2cpus(&wil->mbox_ctl.tx);
121 int wil_priv_init(struct wil6210_priv *wil)
123 wil_dbg_misc(wil, "%s()\n", __func__);
125 mutex_init(&wil->mutex);
126 mutex_init(&wil->wmi_mutex);
128 init_completion(&wil->wmi_ready);
130 wil->pending_connect_cid = -1;
131 setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
133 INIT_WORK(&wil->wmi_connect_worker, wmi_connect_worker);
134 INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
135 INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
137 INIT_LIST_HEAD(&wil->pending_wmi_ev);
138 spin_lock_init(&wil->wmi_ev_lock);
140 wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
144 wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
145 if (!wil->wmi_wq_conn) {
146 destroy_workqueue(wil->wmi_wq);
150 wil_cache_mbox_regs(wil);
155 void wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
157 del_timer_sync(&wil->connect_timer);
158 _wil6210_disconnect(wil, bssid);
161 void wil_priv_deinit(struct wil6210_priv *wil)
163 cancel_work_sync(&wil->disconnect_worker);
164 wil6210_disconnect(wil, NULL);
165 wmi_event_flush(wil);
166 destroy_workqueue(wil->wmi_wq_conn);
167 destroy_workqueue(wil->wmi_wq);
170 static void wil_target_reset(struct wil6210_priv *wil)
172 wil_dbg_misc(wil, "Resetting...\n");
175 #define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
176 /* register set = read, OR, write */
177 #define S(a, v) iowrite32(ioread32(wil->csr + HOSTADDR(a)) | v, \
178 wil->csr + HOSTADDR(a))
180 /* hpal_perst_from_pad_src_n_mask */
181 S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
182 /* car_perst_rst_src_n_mask */
183 S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
185 W(RGF_USER_MAC_CPU_0, BIT(1)); /* mac_cpu_man_rst */
186 W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
190 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
191 W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
192 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
193 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
197 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
198 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
199 W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
200 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
202 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
203 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
204 W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
208 W(RGF_USER_USER_CPU_0, BIT(0)); /* user_cpu_man_de_rst */
212 wil_dbg_misc(wil, "Reset completed\n");
218 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
220 le32_to_cpus(&r->base);
221 le16_to_cpus(&r->entry_size);
222 le16_to_cpus(&r->size);
223 le32_to_cpus(&r->tail);
224 le32_to_cpus(&r->head);
227 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
229 ulong to = msecs_to_jiffies(1000);
230 ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
232 wil_err(wil, "Firmware not ready\n");
235 wil_dbg_misc(wil, "FW ready after %d ms\n",
236 jiffies_to_msecs(to-left));
242 * We reset all the structures, and we reset the UMAC.
243 * After calling this routine, you're expected to reload
246 int wil_reset(struct wil6210_priv *wil)
250 cancel_work_sync(&wil->disconnect_worker);
251 wil6210_disconnect(wil, NULL);
253 wil6210_disable_irq(wil);
256 wmi_event_flush(wil);
258 flush_workqueue(wil->wmi_wq_conn);
259 flush_workqueue(wil->wmi_wq);
261 /* TODO: put MAC in reset */
262 wil_target_reset(wil);
264 /* init after reset */
265 wil->pending_connect_cid = -1;
266 INIT_COMPLETION(wil->wmi_ready);
268 wil_cache_mbox_regs(wil);
270 /* TODO: release MAC reset */
271 wil6210_enable_irq(wil);
273 /* we just started MAC, wait for FW ready */
274 rc = wil_wait_for_fw_ready(wil);
280 void wil_link_on(struct wil6210_priv *wil)
282 struct net_device *ndev = wil_to_ndev(wil);
284 wil_dbg_misc(wil, "%s()\n", __func__);
286 netif_carrier_on(ndev);
287 netif_tx_wake_all_queues(ndev);
290 void wil_link_off(struct wil6210_priv *wil)
292 struct net_device *ndev = wil_to_ndev(wil);
294 wil_dbg_misc(wil, "%s()\n", __func__);
296 netif_tx_stop_all_queues(ndev);
297 netif_carrier_off(ndev);
300 static int __wil_up(struct wil6210_priv *wil)
302 struct net_device *ndev = wil_to_ndev(wil);
303 struct wireless_dev *wdev = wil->wdev;
304 struct ieee80211_channel *channel = wdev->preset_chandef.chan;
307 u16 wmi_nettype = wil_iftype_nl2wmi(wdev->iftype);
313 /* FIXME Firmware works now in PBSS mode(ToDS=0, FromDS=0) */
314 wmi_nettype = wil_iftype_nl2wmi(NL80211_IFTYPE_ADHOC);
315 switch (wdev->iftype) {
316 case NL80211_IFTYPE_STATION:
317 wil_dbg_misc(wil, "type: STATION\n");
319 ndev->type = ARPHRD_ETHER;
321 case NL80211_IFTYPE_AP:
322 wil_dbg_misc(wil, "type: AP\n");
324 ndev->type = ARPHRD_ETHER;
326 case NL80211_IFTYPE_P2P_CLIENT:
327 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
329 ndev->type = ARPHRD_ETHER;
331 case NL80211_IFTYPE_P2P_GO:
332 wil_dbg_misc(wil, "type: P2P_GO\n");
334 ndev->type = ARPHRD_ETHER;
336 case NL80211_IFTYPE_MONITOR:
337 wil_dbg_misc(wil, "type: Monitor\n");
339 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
340 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
346 /* Apply profile in the following order: */
347 /* SSID and channel for the AP */
348 switch (wdev->iftype) {
349 case NL80211_IFTYPE_AP:
350 case NL80211_IFTYPE_P2P_GO:
351 if (wdev->ssid_len == 0) {
352 wil_err(wil, "SSID not set\n");
355 wmi_set_ssid(wil, wdev->ssid_len, wdev->ssid);
357 wmi_set_channel(wil, channel->hw_value);
363 /* MAC address - pre-requisite for other commands */
364 wmi_set_mac_address(wil, ndev->dev_addr);
366 /* Set up beaconing if required. */
367 rc = wmi_set_bcon(wil, bi, wmi_nettype);
371 /* Rx VRING. After MAC and beacon */
377 int wil_up(struct wil6210_priv *wil)
381 mutex_lock(&wil->mutex);
383 mutex_unlock(&wil->mutex);
388 static int __wil_down(struct wil6210_priv *wil)
390 if (wil->scan_request) {
391 cfg80211_scan_done(wil->scan_request, true);
392 wil->scan_request = NULL;
395 wil6210_disconnect(wil, NULL);
401 int wil_down(struct wil6210_priv *wil)
405 mutex_lock(&wil->mutex);
406 rc = __wil_down(wil);
407 mutex_unlock(&wil->mutex);