[deliverable/linux.git] / drivers / net / wireless / ath / wil6210 / main.c

/*
 * Copyright (c) 2012 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/moduleparam.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>

#include "wil6210.h"
#include "txrx.h"

/*
 * Due to a hardware issue,
 * one has to read/write to/from NIC in 32-bit chunks;
 * regular memcpy_fromio and siblings will
 * not work on 64-bit platform - it uses 64-bit transactions
 *
 * Force 32-bit transactions to enable NIC on 64-bit platforms
 *
 * To avoid byte swap on big endian host, __raw_{read|write}l
 * should be used - {read|write}l would swap bytes to provide
 * little endian on PCI value in host endianness.
 */
void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
			  size_t count)
{
	u32 *d = dst;
	const volatile u32 __iomem *s = src;

	/* size_t is unsigned, if (count%4 != 0) it will wrap */
	for (count += 4; count > 4; count -= 4)
		*d++ = __raw_readl(s++);
}

void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
			size_t count)
{
	volatile u32 __iomem *d = dst;
	const u32 *s = src;

	for (count += 4; count > 4; count -= 4)
		__raw_writel(*s++, d++);
}

static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
{
	uint i;
	struct wil_sta_info *sta = &wil->sta[cid];

	sta->data_port_open = false;
	if (sta->status != wil_sta_unused) {
		wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
		sta->status = wil_sta_unused;
	}

	for (i = 0; i < WIL_STA_TID_NUM; i++) {
		struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
		sta->tid_rx[i] = NULL;
		wil_tid_ampdu_rx_free(wil, r);
	}
	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
		if (wil->vring2cid_tid[i][0] == cid)
			wil_vring_fini_tx(wil, i);
	}
	memset(&sta->stats, 0, sizeof(sta->stats));
}

static void _wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
{
	int cid = -ENOENT;
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;

	might_sleep();
	if (bssid) {
		cid = wil_find_cid(wil, bssid);
		wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
	} else {
		wil_dbg_misc(wil, "%s(all)\n", __func__);
	}

	if (cid >= 0) /* disconnect 1 peer */
		wil_disconnect_cid(wil, cid);
	else /* disconnect all */
		for (cid = 0; cid < WIL6210_MAX_CID; cid++)
			wil_disconnect_cid(wil, cid);

	/* link state */
	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_P2P_CLIENT:
		wil_link_off(wil);
		if (test_bit(wil_status_fwconnected, &wil->status)) {
			clear_bit(wil_status_fwconnected, &wil->status);
			cfg80211_disconnected(ndev,
					      WLAN_STATUS_UNSPECIFIED_FAILURE,
					      NULL, 0, GFP_KERNEL);
		} else if (test_bit(wil_status_fwconnecting, &wil->status)) {
			cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
						WLAN_STATUS_UNSPECIFIED_FAILURE,
						GFP_KERNEL);
		}
		clear_bit(wil_status_fwconnecting, &wil->status);
		break;
	default:
		/* AP-like interface and monitor:
		 * never scan, always connected
		 */
		if (bssid)
			cfg80211_del_sta(ndev, bssid, GFP_KERNEL);
		break;
	}
}

static void wil_disconnect_worker(struct work_struct *work)
{
	struct wil6210_priv *wil = container_of(work,
			struct wil6210_priv, disconnect_worker);

	_wil6210_disconnect(wil, NULL);
}

static void wil_connect_timer_fn(ulong x)
{
	struct wil6210_priv *wil = (void *)x;

	wil_dbg_misc(wil, "Connect timeout\n");

	/* reschedule to thread context - disconnect won't
	 * run from atomic context
	 */
	schedule_work(&wil->disconnect_worker);
}

static int wil_find_free_vring(struct wil6210_priv *wil)
{
	int i;
	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
		if (!wil->vring_tx[i].va)
			return i;
	}
	return -EINVAL;
}

static void wil_connect_worker(struct work_struct *work)
{
	int rc;
	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
						connect_worker);
	int cid = wil->pending_connect_cid;
	int ringid = wil_find_free_vring(wil);

	if (cid < 0) {
		wil_err(wil, "No connection pending\n");
		return;
	}

	wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);

	rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
	wil->pending_connect_cid = -1;
	if (rc == 0) {
		wil->sta[cid].status = wil_sta_connected;
		wil_link_on(wil);
	} else {
		wil->sta[cid].status = wil_sta_unused;
	}
}

int wil_priv_init(struct wil6210_priv *wil)
{
	wil_dbg_misc(wil, "%s()\n", __func__);

	memset(wil->sta, 0, sizeof(wil->sta));

	mutex_init(&wil->mutex);
	mutex_init(&wil->wmi_mutex);

	init_completion(&wil->wmi_ready);

	wil->pending_connect_cid = -1;
	setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);

	INIT_WORK(&wil->connect_worker, wil_connect_worker);
	INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
	INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);

	INIT_LIST_HEAD(&wil->pending_wmi_ev);
	spin_lock_init(&wil->wmi_ev_lock);

	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
	if (!wil->wmi_wq)
		return -EAGAIN;

	wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
	if (!wil->wmi_wq_conn) {
		destroy_workqueue(wil->wmi_wq);
		return -EAGAIN;
	}

	return 0;
}

void wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
{
	del_timer_sync(&wil->connect_timer);
	_wil6210_disconnect(wil, bssid);
}

void wil_priv_deinit(struct wil6210_priv *wil)
{
	cancel_work_sync(&wil->disconnect_worker);
	wil6210_disconnect(wil, NULL);
	wmi_event_flush(wil);
	destroy_workqueue(wil->wmi_wq_conn);
	destroy_workqueue(wil->wmi_wq);
}

static void wil_target_reset(struct wil6210_priv *wil)
{
	int delay = 100;
	u32 baud_rate;
	u32 rev_id;

	wil_dbg_misc(wil, "Resetting...\n");

	/* register read */
#define R(a) ioread32(wil->csr + HOSTADDR(a))
	/* register write */
#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
	/* register set = read, OR, write */
#define S(a, v) iowrite32(ioread32(wil->csr + HOSTADDR(a)) | v, \
		wil->csr + HOSTADDR(a))

	wil->hw_version = R(RGF_FW_REV_ID);
	rev_id = wil->hw_version & 0xff;
	/* hpal_perst_from_pad_src_n_mask */
	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
	/* car_perst_rst_src_n_mask */
	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));

	W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */
	W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
	if (rev_id == 1) {
		W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
	} else {
		W(RGF_LOS_COUNTER_CTL, BIT(6) | BIT(8));
		W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
	}
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);

	/* wait until device ready. Use baud rate */
	do {
		msleep(1);
		baud_rate = R(RGF_USER_SERIAL_BAUD_RATE);
		if (delay-- < 0) {
			wil_err(wil, "Reset not completed\n");
			return;
		}
	} while (baud_rate != 0x15e);

	if (rev_id == 2)
		W(RGF_LOS_COUNTER_CTL, BIT(8));

	wil_dbg_misc(wil, "Reset completed\n");

#undef R
#undef W
#undef S
}

void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
{
	le32_to_cpus(&r->base);
	le16_to_cpus(&r->entry_size);
	le16_to_cpus(&r->size);
	le32_to_cpus(&r->tail);
	le32_to_cpus(&r->head);
}

static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
{
	ulong to = msecs_to_jiffies(1000);
	ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
	if (0 == left) {
		wil_err(wil, "Firmware not ready\n");
		return -ETIME;
	} else {
		wil_dbg_misc(wil, "FW ready after %d ms\n",
			     jiffies_to_msecs(to-left));
	}
	return 0;
}

/*
 * We reset all the structures, and we reset the UMAC.
 * After calling this routine, you're expected to reload
 * the firmware.
 */
int wil_reset(struct wil6210_priv *wil)
{
	int rc;

	cancel_work_sync(&wil->disconnect_worker);
	wil6210_disconnect(wil, NULL);

	wil6210_disable_irq(wil);
	wil->status = 0;

	wmi_event_flush(wil);

	flush_workqueue(wil->wmi_wq_conn);
	flush_workqueue(wil->wmi_wq);

	/* TODO: put MAC in reset */
	wil_target_reset(wil);

	/* init after reset */
	wil->pending_connect_cid = -1;
	reinit_completion(&wil->wmi_ready);

	/* TODO: release MAC reset */
	wil6210_enable_irq(wil);

	/* we just started MAC, wait for FW ready */
	rc = wil_wait_for_fw_ready(wil);

	return rc;
}


void wil_link_on(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);

	wil_dbg_misc(wil, "%s()\n", __func__);

	netif_carrier_on(ndev);
	netif_tx_wake_all_queues(ndev);
}

void wil_link_off(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);

	wil_dbg_misc(wil, "%s()\n", __func__);

	netif_tx_stop_all_queues(ndev);
	netif_carrier_off(ndev);
}

static int __wil_up(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;
	int rc;

	rc = wil_reset(wil);
	if (rc)
		return rc;

	/* Rx VRING. After MAC and beacon */
	rc = wil_rx_init(wil);
	if (rc)
		return rc;

	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
		wil_dbg_misc(wil, "type: STATION\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_AP:
		wil_dbg_misc(wil, "type: AP\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_P2P_CLIENT:
		wil_dbg_misc(wil, "type: P2P_CLIENT\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_P2P_GO:
		wil_dbg_misc(wil, "type: P2P_GO\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_MONITOR:
		wil_dbg_misc(wil, "type: Monitor\n");
		ndev->type = ARPHRD_IEEE80211_RADIOTAP;
		/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
		break;
	default:
		return -EOPNOTSUPP;
	}

	/* MAC address - pre-requisite for other commands */
	wmi_set_mac_address(wil, ndev->dev_addr);


	napi_enable(&wil->napi_rx);
	napi_enable(&wil->napi_tx);

	return 0;
}

int wil_up(struct wil6210_priv *wil)
{
	int rc;

	mutex_lock(&wil->mutex);
	rc = __wil_up(wil);
	mutex_unlock(&wil->mutex);

	return rc;
}

static int __wil_down(struct wil6210_priv *wil)
{
	napi_disable(&wil->napi_rx);
	napi_disable(&wil->napi_tx);

	if (wil->scan_request) {
		cfg80211_scan_done(wil->scan_request, true);
		wil->scan_request = NULL;
	}

	wil6210_disconnect(wil, NULL);
	wil_rx_fini(wil);

	return 0;
}

int wil_down(struct wil6210_priv *wil)
{
	int rc;

	mutex_lock(&wil->mutex);
	rc = __wil_down(wil);
	mutex_unlock(&wil->mutex);

	return rc;
}

int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
{
	int i;
	int rc = -ENOENT;

	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
		if ((wil->sta[i].status != wil_sta_unused) &&
		    ether_addr_equal(wil->sta[i].addr, mac)) {
			rc = i;
			break;
		}
	}

	return rc;
}
Commit	Line	Data
2be7d22f VK	1	/*
	2	* Copyright (c) 2012 Qualcomm Atheros, Inc.
	3	*
	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.
	7	*
	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.
	15	*/
	16
2be7d22f VK	17	#include <linux/moduleparam.h>
2be7d22f VK	18	#include <linux/if_arp.h>
108d1eb6	19	#include <linux/etherdevice.h>
2be7d22f VK	20
2be7d22f VK	21	#include "wil6210.h"
b4490f42	22	#include "txrx.h"
2be7d22f VK	23
	24	/*
	25	* Due to a hardware issue,
	26	* one has to read/write to/from NIC in 32-bit chunks;
	27	* regular memcpy_fromio and siblings will
	28	* not work on 64-bit platform - it uses 64-bit transactions
	29	*
	30	* Force 32-bit transactions to enable NIC on 64-bit platforms
	31	*
	32	* To avoid byte swap on big endian host, __raw_{read\|write}l
	33	* should be used - {read\|write}l would swap bytes to provide
	34	* little endian on PCI value in host endianness.
	35	*/
	36	void wil_memcpy_fromio_32(void dst, const volatile void __iomem src,
	37	size_t count)
	38	{
	39	u32 *d = dst;
	40	const volatile u32 __iomem *s = src;
	41
	42	/* size_t is unsigned, if (count%4 != 0) it will wrap */
	43	for (count += 4; count > 4; count -= 4)
	44	*d++ = __raw_readl(s++);
	45	}
	46
	47	void wil_memcpy_toio_32(volatile void __iomem dst, const void src,
	48	size_t count)
	49	{
	50	volatile u32 __iomem *d = dst;
	51	const u32 *s = src;
	52
	53	for (count += 4; count > 4; count -= 4)
	54	__raw_writel(*s++, d++);
	55	}
	56
91886b0b VK	57	static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
	58	{
	59	uint i;
	60	struct wil_sta_info *sta = &wil->sta[cid];
4d55a0a1	61
e58c9f70	62	sta->data_port_open = false;
4d55a0a1 VK	63	if (sta->status != wil_sta_unused) {
	64	wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
	65	sta->status = wil_sta_unused;
	66	}
	67
91886b0b VK	68	for (i = 0; i < WIL_STA_TID_NUM; i++) {
	69	struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
	70	sta->tid_rx[i] = NULL;
	71	wil_tid_ampdu_rx_free(wil, r);
	72	}
	73	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
	74	if (wil->vring2cid_tid[i][0] == cid)
	75	wil_vring_fini_tx(wil, i);
	76	}
	77	memset(&sta->stats, 0, sizeof(sta->stats));
	78	}
	79
2be7d22f VK	80	static void _wil6210_disconnect(struct wil6210_priv wil, void bssid)
2be7d22f VK	81	{
91886b0b	82	int cid = -ENOENT;
2be7d22f	83	struct net_device *ndev = wil_to_ndev(wil);
91886b0b VK	84	struct wireless_dev *wdev = wil->wdev;
	85
	86	might_sleep();
	87	if (bssid) {
	88	cid = wil_find_cid(wil, bssid);
	89	wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
	90	} else {
	91	wil_dbg_misc(wil, "%s(all)\n", __func__);
b4490f42 VK	92	}
b4490f42 VK	93
91886b0b VK	94	if (cid >= 0) /* disconnect 1 peer */
	95	wil_disconnect_cid(wil, cid);
	96	else /* disconnect all */
	97	for (cid = 0; cid < WIL6210_MAX_CID; cid++)
	98	wil_disconnect_cid(wil, cid);
	99
	100	/* link state */
	101	switch (wdev->iftype) {
	102	case NL80211_IFTYPE_STATION:
	103	case NL80211_IFTYPE_P2P_CLIENT:
	104	wil_link_off(wil);
	105	if (test_bit(wil_status_fwconnected, &wil->status)) {
	106	clear_bit(wil_status_fwconnected, &wil->status);
	107	cfg80211_disconnected(ndev,
	108	WLAN_STATUS_UNSPECIFIED_FAILURE,
	109	NULL, 0, GFP_KERNEL);
	110	} else if (test_bit(wil_status_fwconnecting, &wil->status)) {
	111	cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
	112	WLAN_STATUS_UNSPECIFIED_FAILURE,
	113	GFP_KERNEL);
	114	}
	115	clear_bit(wil_status_fwconnecting, &wil->status);
91886b0b VK	116	break;
	117	default:
	118	/* AP-like interface and monitor:
	119	* never scan, always connected
	120	*/
	121	if (bssid)
	122	cfg80211_del_sta(ndev, bssid, GFP_KERNEL);
	123	break;
2be7d22f	124	}
2be7d22f VK	125	}
	126
	127	static void wil_disconnect_worker(struct work_struct *work)
	128	{
	129	struct wil6210_priv *wil = container_of(work,
	130	struct wil6210_priv, disconnect_worker);
	131
	132	_wil6210_disconnect(wil, NULL);
	133	}
	134
	135	static void wil_connect_timer_fn(ulong x)
	136	{
	137	struct wil6210_priv wil = (void )x;
	138
7743882d	139	wil_dbg_misc(wil, "Connect timeout\n");
2be7d22f VK	140
	141	/* reschedule to thread context - disconnect won't
	142	* run from atomic context
	143	*/
	144	schedule_work(&wil->disconnect_worker);
	145	}
	146
9a177384 VK	147	static int wil_find_free_vring(struct wil6210_priv *wil)
	148	{
	149	int i;
	150	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
	151	if (!wil->vring_tx[i].va)
	152	return i;
	153	}
	154	return -EINVAL;
	155	}
	156
d81079f1 VK	157	static void wil_connect_worker(struct work_struct *work)
	158	{
	159	int rc;
	160	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
	161	connect_worker);
	162	int cid = wil->pending_connect_cid;
9a177384	163	int ringid = wil_find_free_vring(wil);
d81079f1 VK	164
	165	if (cid < 0) {
	166	wil_err(wil, "No connection pending\n");
	167	return;
	168	}
	169
	170	wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
	171
9a177384	172	rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
d81079f1	173	wil->pending_connect_cid = -1;
3df2cd36 VK	174	if (rc == 0) {
3df2cd36 VK	175	wil->sta[cid].status = wil_sta_connected;
d81079f1	176	wil_link_on(wil);
3df2cd36 VK	177	} else {
	178	wil->sta[cid].status = wil_sta_unused;
	179	}
d81079f1 VK	180	}
d81079f1 VK	181
2be7d22f VK	182	int wil_priv_init(struct wil6210_priv *wil)
2be7d22f VK	183	{
7743882d	184	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f	185
3df2cd36 VK	186	memset(wil->sta, 0, sizeof(wil->sta));
3df2cd36 VK	187
2be7d22f VK	188	mutex_init(&wil->mutex);
	189	mutex_init(&wil->wmi_mutex);
	190
	191	init_completion(&wil->wmi_ready);
	192
	193	wil->pending_connect_cid = -1;
	194	setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
	195
d81079f1	196	INIT_WORK(&wil->connect_worker, wil_connect_worker);
2be7d22f VK	197	INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
	198	INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
	199
	200	INIT_LIST_HEAD(&wil->pending_wmi_ev);
	201	spin_lock_init(&wil->wmi_ev_lock);
	202
	203	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
	204	if (!wil->wmi_wq)
	205	return -EAGAIN;
	206
	207	wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
	208	if (!wil->wmi_wq_conn) {
	209	destroy_workqueue(wil->wmi_wq);
	210	return -EAGAIN;
	211	}
	212
2be7d22f VK	213	return 0;
	214	}
	215
	216	void wil6210_disconnect(struct wil6210_priv wil, void bssid)
	217	{
	218	del_timer_sync(&wil->connect_timer);
	219	_wil6210_disconnect(wil, bssid);
	220	}
	221
	222	void wil_priv_deinit(struct wil6210_priv *wil)
	223	{
	224	cancel_work_sync(&wil->disconnect_worker);
	225	wil6210_disconnect(wil, NULL);
	226	wmi_event_flush(wil);
	227	destroy_workqueue(wil->wmi_wq_conn);
	228	destroy_workqueue(wil->wmi_wq);
	229	}
	230
	231	static void wil_target_reset(struct wil6210_priv *wil)
	232	{
36b10a72 VK	233	int delay = 100;
	234	u32 baud_rate;
	235	u32 rev_id;
	236
7743882d	237	wil_dbg_misc(wil, "Resetting...\n");
2be7d22f	238
36b10a72 VK	239	/* register read */
36b10a72 VK	240	#define R(a) ioread32(wil->csr + HOSTADDR(a))
2be7d22f VK	241	/* register write */
	242	#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
	243	/* register set = read, OR, write */
	244	#define S(a, v) iowrite32(ioread32(wil->csr + HOSTADDR(a)) \| v, \
	245	wil->csr + HOSTADDR(a))
	246
36b10a72 VK	247	wil->hw_version = R(RGF_FW_REV_ID);
36b10a72 VK	248	rev_id = wil->hw_version & 0xff;
2be7d22f VK	249	/* hpal_perst_from_pad_src_n_mask */
	250	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
	251	/* car_perst_rst_src_n_mask */
	252	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
	253
	254	W(RGF_USER_MAC_CPU_0, BIT(1)); /* mac_cpu_man_rst */
	255	W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
	256
2be7d22f VK	257	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
	258	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
	259	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
	260	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
	261
2be7d22f VK	262	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
	263	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
	264	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
	265	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
	266
	267	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
36b10a72 VK	268	if (rev_id == 1) {
	269	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
	270	} else {
	271	W(RGF_LOS_COUNTER_CTL, BIT(6) \| BIT(8));
	272	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
	273	}
2be7d22f VK	274	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
2be7d22f VK	275
36b10a72 VK	276	/* wait until device ready. Use baud rate */
	277	do {
	278	msleep(1);
	279	baud_rate = R(RGF_USER_SERIAL_BAUD_RATE);
	280	if (delay-- < 0) {
	281	wil_err(wil, "Reset not completed\n");
	282	return;
	283	}
	284	} while (baud_rate != 0x15e);
	285
	286	if (rev_id == 2)
	287	W(RGF_LOS_COUNTER_CTL, BIT(8));
	288
7743882d	289	wil_dbg_misc(wil, "Reset completed\n");
2be7d22f	290
36b10a72	291	#undef R
2be7d22f VK	292	#undef W
	293	#undef S
	294	}
	295
	296	void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
	297	{
	298	le32_to_cpus(&r->base);
	299	le16_to_cpus(&r->entry_size);
	300	le16_to_cpus(&r->size);
	301	le32_to_cpus(&r->tail);
	302	le32_to_cpus(&r->head);
	303	}
	304
	305	static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
	306	{
	307	ulong to = msecs_to_jiffies(1000);
	308	ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
	309	if (0 == left) {
	310	wil_err(wil, "Firmware not ready\n");
	311	return -ETIME;
	312	} else {
7743882d	313	wil_dbg_misc(wil, "FW ready after %d ms\n",
2057ebb2	314	jiffies_to_msecs(to-left));
2be7d22f VK	315	}
	316	return 0;
	317	}
	318
	319	/*
	320	* We reset all the structures, and we reset the UMAC.
	321	* After calling this routine, you're expected to reload
	322	* the firmware.
	323	*/
	324	int wil_reset(struct wil6210_priv *wil)
	325	{
	326	int rc;
	327
	328	cancel_work_sync(&wil->disconnect_worker);
	329	wil6210_disconnect(wil, NULL);
	330
e08b5906 VK	331	wil6210_disable_irq(wil);
	332	wil->status = 0;
	333
2be7d22f VK	334	wmi_event_flush(wil);
2be7d22f VK	335
2be7d22f	336	flush_workqueue(wil->wmi_wq_conn);
e08b5906	337	flush_workqueue(wil->wmi_wq);
2be7d22f VK	338
	339	/* TODO: put MAC in reset */
	340	wil_target_reset(wil);
	341
	342	/* init after reset */
	343	wil->pending_connect_cid = -1;
16735d02	344	reinit_completion(&wil->wmi_ready);
2be7d22f	345
2be7d22f VK	346	/* TODO: release MAC reset */
	347	wil6210_enable_irq(wil);
	348
	349	/* we just started MAC, wait for FW ready */
	350	rc = wil_wait_for_fw_ready(wil);
	351
	352	return rc;
	353	}
	354
	355
	356	void wil_link_on(struct wil6210_priv *wil)
	357	{
	358	struct net_device *ndev = wil_to_ndev(wil);
	359
7743882d	360	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f VK	361
	362	netif_carrier_on(ndev);
	363	netif_tx_wake_all_queues(ndev);
	364	}
	365
	366	void wil_link_off(struct wil6210_priv *wil)
	367	{
	368	struct net_device *ndev = wil_to_ndev(wil);
	369
7743882d	370	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f VK	371
	372	netif_tx_stop_all_queues(ndev);
	373	netif_carrier_off(ndev);
	374	}
	375
	376	static int __wil_up(struct wil6210_priv *wil)
	377	{
	378	struct net_device *ndev = wil_to_ndev(wil);
	379	struct wireless_dev *wdev = wil->wdev;
2be7d22f	380	int rc;
2be7d22f VK	381
	382	rc = wil_reset(wil);
	383	if (rc)
	384	return rc;
	385
e31b2562 VK	386	/* Rx VRING. After MAC and beacon */
	387	rc = wil_rx_init(wil);
	388	if (rc)
	389	return rc;
	390
2be7d22f VK	391	switch (wdev->iftype) {
2be7d22f VK	392	case NL80211_IFTYPE_STATION:
7743882d	393	wil_dbg_misc(wil, "type: STATION\n");
2be7d22f VK	394	ndev->type = ARPHRD_ETHER;
	395	break;
	396	case NL80211_IFTYPE_AP:
7743882d	397	wil_dbg_misc(wil, "type: AP\n");
2be7d22f VK	398	ndev->type = ARPHRD_ETHER;
	399	break;
	400	case NL80211_IFTYPE_P2P_CLIENT:
7743882d	401	wil_dbg_misc(wil, "type: P2P_CLIENT\n");
2be7d22f VK	402	ndev->type = ARPHRD_ETHER;
	403	break;
	404	case NL80211_IFTYPE_P2P_GO:
7743882d	405	wil_dbg_misc(wil, "type: P2P_GO\n");
2be7d22f VK	406	ndev->type = ARPHRD_ETHER;
	407	break;
	408	case NL80211_IFTYPE_MONITOR:
7743882d	409	wil_dbg_misc(wil, "type: Monitor\n");
2be7d22f VK	410	ndev->type = ARPHRD_IEEE80211_RADIOTAP;
	411	/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
	412	break;
	413	default:
	414	return -EOPNOTSUPP;
	415	}
	416
2be7d22f VK	417	/* MAC address - pre-requisite for other commands */
	418	wmi_set_mac_address(wil, ndev->dev_addr);
	419
2be7d22f	420
e0287c4a VK	421	napi_enable(&wil->napi_rx);
	422	napi_enable(&wil->napi_tx);
	423
2be7d22f VK	424	return 0;
	425	}
	426
	427	int wil_up(struct wil6210_priv *wil)
	428	{
	429	int rc;
	430
	431	mutex_lock(&wil->mutex);
	432	rc = __wil_up(wil);
	433	mutex_unlock(&wil->mutex);
	434
	435	return rc;
	436	}
	437
	438	static int __wil_down(struct wil6210_priv *wil)
	439	{
e0287c4a VK	440	napi_disable(&wil->napi_rx);
	441	napi_disable(&wil->napi_tx);
	442
2be7d22f VK	443	if (wil->scan_request) {
	444	cfg80211_scan_done(wil->scan_request, true);
	445	wil->scan_request = NULL;
	446	}
	447
	448	wil6210_disconnect(wil, NULL);
	449	wil_rx_fini(wil);
	450
	451	return 0;
	452	}
	453
	454	int wil_down(struct wil6210_priv *wil)
	455	{
	456	int rc;
	457
	458	mutex_lock(&wil->mutex);
	459	rc = __wil_down(wil);
	460	mutex_unlock(&wil->mutex);
	461
	462	return rc;
	463	}
3df2cd36 VK	464
	465	int wil_find_cid(struct wil6210_priv wil, const u8 mac)
	466	{
	467	int i;
	468	int rc = -ENOENT;
	469
	470	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
	471	if ((wil->sta[i].status != wil_sta_unused) &&
108d1eb6	472	ether_addr_equal(wil->sta[i].addr, mac)) {
3df2cd36 VK	473	rc = i;
	474	break;
	475	}
	476	}
	477
	478	return rc;
	479	}