[linux-block.git] / drivers / bluetooth / btmrvl_main.c

/**
 * Marvell Bluetooth driver
 *
 * Copyright (C) 2009, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 **/

#include <linux/module.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "btmrvl_drv.h"

#define VERSION "1.0"

/*
 * This function is called by interface specific interrupt handler.
 * It updates Power Save & Host Sleep states, and wakes up the main
 * thread.
 */
void btmrvl_interrupt(struct btmrvl_private *priv)
{
	priv->adapter->ps_state = PS_AWAKE;

	priv->adapter->wakeup_tries = 0;

	priv->adapter->int_count++;

	wake_up_interruptible(&priv->main_thread.wait_q);
}
EXPORT_SYMBOL_GPL(btmrvl_interrupt);

bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
{
	struct hci_event_hdr *hdr = (void *) skb->data;

	if (hdr->evt == HCI_EV_CMD_COMPLETE) {
		struct hci_ev_cmd_complete *ec;
		u16 opcode, ocf, ogf;

		ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
		opcode = __le16_to_cpu(ec->opcode);
		ocf = hci_opcode_ocf(opcode);
		ogf = hci_opcode_ogf(opcode);

		if (priv->btmrvl_dev.sendcmdflag) {
			priv->btmrvl_dev.sendcmdflag = false;
			priv->adapter->cmd_complete = true;
			wake_up_interruptible(&priv->adapter->cmd_wait_q);
		}

		if (ogf == OGF) {
			BT_DBG("vendor event skipped: ogf 0x%4.4x ocf 0x%4.4x",
			       ogf, ocf);
			kfree_skb(skb);
			return false;
		}
	}

	return true;
}
EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);

int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
{
	struct btmrvl_adapter *adapter = priv->adapter;
	struct btmrvl_event *event;
	int ret = 0;

	event = (struct btmrvl_event *) skb->data;
	if (event->ec != 0xff) {
		BT_DBG("Not Marvell Event=%x", event->ec);
		ret = -EINVAL;
		goto exit;
	}

	switch (event->data[0]) {
	case BT_CMD_AUTO_SLEEP_MODE:
		if (!event->data[2]) {
			if (event->data[1] == BT_PS_ENABLE)
				adapter->psmode = 1;
			else
				adapter->psmode = 0;
			BT_DBG("PS Mode:%s",
				(adapter->psmode) ? "Enable" : "Disable");
		} else {
			BT_DBG("PS Mode command failed");
		}
		break;

	case BT_CMD_HOST_SLEEP_CONFIG:
		if (!event->data[3])
			BT_DBG("gpio=%x, gap=%x", event->data[1],
							event->data[2]);
		else
			BT_DBG("HSCFG command failed");
		break;

	case BT_CMD_HOST_SLEEP_ENABLE:
		if (!event->data[1]) {
			adapter->hs_state = HS_ACTIVATED;
			if (adapter->psmode)
				adapter->ps_state = PS_SLEEP;
			BT_DBG("HS ACTIVATED!");
		} else {
			BT_DBG("HS Enable failed");
		}
		break;

	case BT_CMD_MODULE_CFG_REQ:
		if (priv->btmrvl_dev.sendcmdflag &&
				event->data[1] == MODULE_BRINGUP_REQ) {
			BT_DBG("EVENT:%s",
				((event->data[2] == MODULE_BROUGHT_UP) ||
				(event->data[2] == MODULE_ALREADY_UP)) ?
				"Bring-up succeed" : "Bring-up failed");

			if (event->length > 3 && event->data[3])
				priv->btmrvl_dev.dev_type = HCI_AMP;
			else
				priv->btmrvl_dev.dev_type = HCI_BREDR;

			BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
		} else if (priv->btmrvl_dev.sendcmdflag &&
				event->data[1] == MODULE_SHUTDOWN_REQ) {
			BT_DBG("EVENT:%s", (event->data[2]) ?
				"Shutdown failed" : "Shutdown succeed");
		} else {
			BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
			ret = -EINVAL;
		}
		break;

	case BT_EVENT_POWER_STATE:
		if (event->data[1] == BT_PS_SLEEP)
			adapter->ps_state = PS_SLEEP;
		BT_DBG("EVENT:%s",
			(adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
		break;

	default:
		BT_DBG("Unknown Event=%d", event->data[0]);
		ret = -EINVAL;
		break;
	}

exit:
	if (!ret)
		kfree_skb(skb);

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_process_event);

static int btmrvl_send_sync_cmd(struct btmrvl_private *priv, u16 cmd_no,
				const void *param, u8 len)
{
	struct sk_buff *skb;
	struct hci_command_hdr *hdr;

	skb = bt_skb_alloc(HCI_COMMAND_HDR_SIZE + len, GFP_ATOMIC);
	if (skb == NULL) {
		BT_ERR("No free skb");
		return -ENOMEM;
	}

	hdr = (struct hci_command_hdr *)skb_put(skb, HCI_COMMAND_HDR_SIZE);
	hdr->opcode = cpu_to_le16(hci_opcode_pack(OGF, cmd_no));
	hdr->plen = len;

	if (len)
		memcpy(skb_put(skb, len), param, len);

	bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;

	skb->dev = (void *) priv->btmrvl_dev.hcidev;
	skb_queue_head(&priv->adapter->tx_queue, skb);

	priv->btmrvl_dev.sendcmdflag = true;

	priv->adapter->cmd_complete = false;

	wake_up_interruptible(&priv->main_thread.wait_q);

	if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
				priv->adapter->cmd_complete,
				msecs_to_jiffies(WAIT_UNTIL_CMD_RESP)))
		return -ETIMEDOUT;

	return 0;
}

int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
{
	int ret;

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_MODULE_CFG_REQ, &subcmd, 1);
	if (ret)
		BT_ERR("module_cfg_cmd(%x) failed\n", subcmd);

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);

int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
{
	int ret;
	u8 param[2];

	param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
	param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);

	BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
	       param[0], param[1]);

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
	if (ret)
		BT_ERR("HSCFG command failed\n");

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);

int btmrvl_enable_ps(struct btmrvl_private *priv)
{
	int ret;
	u8 param;

	if (priv->btmrvl_dev.psmode)
		param = BT_PS_ENABLE;
	else
		param = BT_PS_DISABLE;

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
	if (ret)
		BT_ERR("PSMODE command failed\n");

	return 0;
}
EXPORT_SYMBOL_GPL(btmrvl_enable_ps);

int btmrvl_enable_hs(struct btmrvl_private *priv)
{
	int ret;

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
	if (ret)
		BT_ERR("Host sleep enable command failed\n");

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_enable_hs);

int btmrvl_prepare_command(struct btmrvl_private *priv)
{
	int ret = 0;

	if (priv->btmrvl_dev.hscfgcmd) {
		priv->btmrvl_dev.hscfgcmd = 0;
		btmrvl_send_hscfg_cmd(priv);
	}

	if (priv->btmrvl_dev.pscmd) {
		priv->btmrvl_dev.pscmd = 0;
		btmrvl_enable_ps(priv);
	}

	if (priv->btmrvl_dev.hscmd) {
		priv->btmrvl_dev.hscmd = 0;

		if (priv->btmrvl_dev.hsmode) {
			ret = btmrvl_enable_hs(priv);
		} else {
			ret = priv->hw_wakeup_firmware(priv);
			priv->adapter->hs_state = HS_DEACTIVATED;
		}
	}

	return ret;
}

static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
{
	int ret = 0;

	if (!skb || !skb->data)
		return -EINVAL;

	if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
		BT_ERR("Tx Error: Bad skb length %d : %d",
						skb->len, BTM_UPLD_SIZE);
		return -EINVAL;
	}

	if (skb_headroom(skb) < BTM_HEADER_LEN) {
		struct sk_buff *tmp = skb;

		skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
		if (!skb) {
			BT_ERR("Tx Error: realloc_headroom failed %d",
				BTM_HEADER_LEN);
			skb = tmp;
			return -EINVAL;
		}

		kfree_skb(tmp);
	}

	skb_push(skb, BTM_HEADER_LEN);

	/* header type: byte[3]
	 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
	 * header length: byte[2][1][0]
	 */

	skb->data[0] = (skb->len & 0x0000ff);
	skb->data[1] = (skb->len & 0x00ff00) >> 8;
	skb->data[2] = (skb->len & 0xff0000) >> 16;
	skb->data[3] = bt_cb(skb)->pkt_type;

	if (priv->hw_host_to_card)
		ret = priv->hw_host_to_card(priv, skb->data, skb->len);

	return ret;
}

static void btmrvl_init_adapter(struct btmrvl_private *priv)
{
	skb_queue_head_init(&priv->adapter->tx_queue);

	priv->adapter->ps_state = PS_AWAKE;

	init_waitqueue_head(&priv->adapter->cmd_wait_q);
}

static void btmrvl_free_adapter(struct btmrvl_private *priv)
{
	skb_queue_purge(&priv->adapter->tx_queue);

	kfree(priv->adapter);

	priv->adapter = NULL;
}

static int btmrvl_ioctl(struct hci_dev *hdev,
				unsigned int cmd, unsigned long arg)
{
	return -ENOIOCTLCMD;
}

static int btmrvl_send_frame(struct sk_buff *skb)
{
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
	struct btmrvl_private *priv = NULL;

	BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);

	if (!hdev) {
		BT_ERR("Frame for unknown HCI device");
		return -ENODEV;
	}

	priv = hci_get_drvdata(hdev);

	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
		BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
		print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
							skb->data, skb->len);
		return -EBUSY;
	}

	switch (bt_cb(skb)->pkt_type) {
	case HCI_COMMAND_PKT:
		hdev->stat.cmd_tx++;
		break;

	case HCI_ACLDATA_PKT:
		hdev->stat.acl_tx++;
		break;

	case HCI_SCODATA_PKT:
		hdev->stat.sco_tx++;
		break;
	}

	skb_queue_tail(&priv->adapter->tx_queue, skb);

	wake_up_interruptible(&priv->main_thread.wait_q);

	return 0;
}

static int btmrvl_flush(struct hci_dev *hdev)
{
	struct btmrvl_private *priv = hci_get_drvdata(hdev);

	skb_queue_purge(&priv->adapter->tx_queue);

	return 0;
}

static int btmrvl_close(struct hci_dev *hdev)
{
	struct btmrvl_private *priv = hci_get_drvdata(hdev);

	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
		return 0;

	skb_queue_purge(&priv->adapter->tx_queue);

	return 0;
}

static int btmrvl_open(struct hci_dev *hdev)
{
	set_bit(HCI_RUNNING, &hdev->flags);

	return 0;
}

static int btmrvl_setup(struct hci_dev *hdev)
{
	struct btmrvl_private *priv = hci_get_drvdata(hdev);

	btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);

	priv->btmrvl_dev.psmode = 1;
	btmrvl_enable_ps(priv);

	priv->btmrvl_dev.gpio_gap = 0xffff;
	btmrvl_send_hscfg_cmd(priv);

	return 0;
}

/*
 * This function handles the event generated by firmware, rx data
 * received from firmware, and tx data sent from kernel.
 */
static int btmrvl_service_main_thread(void *data)
{
	struct btmrvl_thread *thread = data;
	struct btmrvl_private *priv = thread->priv;
	struct btmrvl_adapter *adapter = priv->adapter;
	wait_queue_t wait;
	struct sk_buff *skb;
	ulong flags;

	init_waitqueue_entry(&wait, current);

	for (;;) {
		add_wait_queue(&thread->wait_q, &wait);

		set_current_state(TASK_INTERRUPTIBLE);
		if (kthread_should_stop()) {
			BT_DBG("main_thread: break from main thread");
			break;
		}

		if (adapter->wakeup_tries ||
				((!adapter->int_count) &&
				(!priv->btmrvl_dev.tx_dnld_rdy ||
				skb_queue_empty(&adapter->tx_queue)))) {
			BT_DBG("main_thread is sleeping...");
			schedule();
		}

		set_current_state(TASK_RUNNING);

		remove_wait_queue(&thread->wait_q, &wait);

		BT_DBG("main_thread woke up");

		spin_lock_irqsave(&priv->driver_lock, flags);
		if (adapter->int_count) {
			adapter->int_count = 0;
			spin_unlock_irqrestore(&priv->driver_lock, flags);
			priv->hw_process_int_status(priv);
		} else if (adapter->ps_state == PS_SLEEP &&
					!skb_queue_empty(&adapter->tx_queue)) {
			spin_unlock_irqrestore(&priv->driver_lock, flags);
			adapter->wakeup_tries++;
			priv->hw_wakeup_firmware(priv);
			continue;
		} else {
			spin_unlock_irqrestore(&priv->driver_lock, flags);
		}

		if (adapter->ps_state == PS_SLEEP)
			continue;

		if (!priv->btmrvl_dev.tx_dnld_rdy)
			continue;

		skb = skb_dequeue(&adapter->tx_queue);
		if (skb) {
			if (btmrvl_tx_pkt(priv, skb))
				priv->btmrvl_dev.hcidev->stat.err_tx++;
			else
				priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;

			kfree_skb(skb);
		}
	}

	return 0;
}

int btmrvl_register_hdev(struct btmrvl_private *priv)
{
	struct hci_dev *hdev = NULL;
	int ret;

	hdev = hci_alloc_dev();
	if (!hdev) {
		BT_ERR("Can not allocate HCI device");
		goto err_hdev;
	}

	priv->btmrvl_dev.hcidev = hdev;
	hci_set_drvdata(hdev, priv);

	hdev->bus = HCI_SDIO;
	hdev->open = btmrvl_open;
	hdev->close = btmrvl_close;
	hdev->flush = btmrvl_flush;
	hdev->send = btmrvl_send_frame;
	hdev->ioctl = btmrvl_ioctl;
	hdev->setup = btmrvl_setup;

	hdev->dev_type = priv->btmrvl_dev.dev_type;

	ret = hci_register_dev(hdev);
	if (ret < 0) {
		BT_ERR("Can not register HCI device");
		goto err_hci_register_dev;
	}

#ifdef CONFIG_DEBUG_FS
	btmrvl_debugfs_init(hdev);
#endif

	return 0;

err_hci_register_dev:
	hci_free_dev(hdev);

err_hdev:
	/* Stop the thread servicing the interrupts */
	kthread_stop(priv->main_thread.task);

	btmrvl_free_adapter(priv);
	kfree(priv);

	return -ENOMEM;
}
EXPORT_SYMBOL_GPL(btmrvl_register_hdev);

struct btmrvl_private *btmrvl_add_card(void *card)
{
	struct btmrvl_private *priv;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		BT_ERR("Can not allocate priv");
		goto err_priv;
	}

	priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
	if (!priv->adapter) {
		BT_ERR("Allocate buffer for btmrvl_adapter failed!");
		goto err_adapter;
	}

	btmrvl_init_adapter(priv);

	BT_DBG("Starting kthread...");
	priv->main_thread.priv = priv;
	spin_lock_init(&priv->driver_lock);

	init_waitqueue_head(&priv->main_thread.wait_q);
	priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
				&priv->main_thread, "btmrvl_main_service");

	priv->btmrvl_dev.card = card;
	priv->btmrvl_dev.tx_dnld_rdy = true;

	return priv;

err_adapter:
	kfree(priv);

err_priv:
	return NULL;
}
EXPORT_SYMBOL_GPL(btmrvl_add_card);

int btmrvl_remove_card(struct btmrvl_private *priv)
{
	struct hci_dev *hdev;

	hdev = priv->btmrvl_dev.hcidev;

	wake_up_interruptible(&priv->adapter->cmd_wait_q);

	kthread_stop(priv->main_thread.task);

#ifdef CONFIG_DEBUG_FS
	btmrvl_debugfs_remove(hdev);
#endif

	hci_unregister_dev(hdev);

	hci_free_dev(hdev);

	priv->btmrvl_dev.hcidev = NULL;

	btmrvl_free_adapter(priv);

	kfree(priv);

	return 0;
}
EXPORT_SYMBOL_GPL(btmrvl_remove_card);

MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL v2");
Commit	Line	Data
132ff4e5 BZ	1	/**
	2	* Marvell Bluetooth driver
	3	*
	4	* Copyright (C) 2009, Marvell International Ltd.
	5	*
	6	* This software file (the "File") is distributed by Marvell International
	7	* Ltd. under the terms of the GNU General Public License Version 2, June 1991
	8	* (the "License"). You may use, redistribute and/or modify this File in
	9	* accordance with the terms and conditions of the License, a copy of which
	10	* is available by writing to the Free Software Foundation, Inc.,
	11	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
	12	* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
	13	*
	14	*
	15	* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
	16	* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
	17	* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
	18	* this warranty disclaimer.
	19	**/
	20
a59b968e PG	21	#include <linux/module.h>
a59b968e PG	22
132ff4e5 BZ	23	#include <net/bluetooth/bluetooth.h>
	24	#include <net/bluetooth/hci_core.h>
	25
	26	#include "btmrvl_drv.h"
	27
	28	#define VERSION "1.0"
	29
	30	/*
	31	* This function is called by interface specific interrupt handler.
	32	* It updates Power Save & Host Sleep states, and wakes up the main
	33	* thread.
	34	*/
	35	void btmrvl_interrupt(struct btmrvl_private *priv)
	36	{
132ff4e5 BZ	37	priv->adapter->ps_state = PS_AWAKE;
	38
	39	priv->adapter->wakeup_tries = 0;
	40
	41	priv->adapter->int_count++;
	42
	43	wake_up_interruptible(&priv->main_thread.wait_q);
132ff4e5 BZ	44	}
	45	EXPORT_SYMBOL_GPL(btmrvl_interrupt);
	46
ea1e76a3	47	bool btmrvl_check_evtpkt(struct btmrvl_private priv, struct sk_buff skb)
132ff4e5	48	{
4271e08d	49	struct hci_event_hdr hdr = (void ) skb->data;
132ff4e5	50
132ff4e5	51	if (hdr->evt == HCI_EV_CMD_COMPLETE) {
2c2453f3 AE	52	struct hci_ev_cmd_complete *ec;
	53	u16 opcode, ocf, ogf;
	54
4271e08d	55	ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
132ff4e5 BZ	56	opcode = __le16_to_cpu(ec->opcode);
132ff4e5 BZ	57	ocf = hci_opcode_ocf(opcode);
ea1e76a3 AE	58	ogf = hci_opcode_ogf(opcode);
ea1e76a3 AE	59
c037874c	60	if (priv->btmrvl_dev.sendcmdflag) {
132ff4e5 BZ	61	priv->btmrvl_dev.sendcmdflag = false;
	62	priv->adapter->cmd_complete = true;
	63	wake_up_interruptible(&priv->adapter->cmd_wait_q);
	64	}
ea1e76a3 AE	65
ea1e76a3 AE	66	if (ogf == OGF) {
2c2453f3 AE	67	BT_DBG("vendor event skipped: ogf 0x%4.4x ocf 0x%4.4x",
2c2453f3 AE	68	ogf, ocf);
ea1e76a3 AE	69	kfree_skb(skb);
	70	return false;
	71	}
132ff4e5	72	}
ea1e76a3 AE	73
ea1e76a3 AE	74	return true;
132ff4e5 BZ	75	}
	76	EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
	77
	78	int btmrvl_process_event(struct btmrvl_private priv, struct sk_buff skb)
	79	{
	80	struct btmrvl_adapter *adapter = priv->adapter;
132ff4e5	81	struct btmrvl_event *event;
31f085fe	82	int ret = 0;
132ff4e5	83
132ff4e5 BZ	84	event = (struct btmrvl_event *) skb->data;
	85	if (event->ec != 0xff) {
	86	BT_DBG("Not Marvell Event=%x", event->ec);
	87	ret = -EINVAL;
	88	goto exit;
	89	}
	90
	91	switch (event->data[0]) {
	92	case BT_CMD_AUTO_SLEEP_MODE:
	93	if (!event->data[2]) {
	94	if (event->data[1] == BT_PS_ENABLE)
	95	adapter->psmode = 1;
	96	else
	97	adapter->psmode = 0;
	98	BT_DBG("PS Mode:%s",
	99	(adapter->psmode) ? "Enable" : "Disable");
	100	} else {
	101	BT_DBG("PS Mode command failed");
	102	}
	103	break;
	104
	105	case BT_CMD_HOST_SLEEP_CONFIG:
	106	if (!event->data[3])
	107	BT_DBG("gpio=%x, gap=%x", event->data[1],
4271e08d	108	event->data[2]);
132ff4e5 BZ	109	else
	110	BT_DBG("HSCFG command failed");
	111	break;
	112
	113	case BT_CMD_HOST_SLEEP_ENABLE:
	114	if (!event->data[1]) {
	115	adapter->hs_state = HS_ACTIVATED;
	116	if (adapter->psmode)
	117	adapter->ps_state = PS_SLEEP;
132ff4e5 BZ	118	BT_DBG("HS ACTIVATED!");
	119	} else {
	120	BT_DBG("HS Enable failed");
	121	}
	122	break;
	123
	124	case BT_CMD_MODULE_CFG_REQ:
4271e08d MH	125	if (priv->btmrvl_dev.sendcmdflag &&
4271e08d MH	126	event->data[1] == MODULE_BRINGUP_REQ) {
903c8437 BZ	127	BT_DBG("EVENT:%s",
	128	((event->data[2] == MODULE_BROUGHT_UP) \|\|
	129	(event->data[2] == MODULE_ALREADY_UP)) ?
	130	"Bring-up succeed" : "Bring-up failed");
f120c6b6	131
8f1e1742 DV	132	if (event->length > 3 && event->data[3])
8f1e1742 DV	133	priv->btmrvl_dev.dev_type = HCI_AMP;
f120c6b6 BZ	134	else
	135	priv->btmrvl_dev.dev_type = HCI_BREDR;
	136
	137	BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
4271e08d MH	138	} else if (priv->btmrvl_dev.sendcmdflag &&
4271e08d MH	139	event->data[1] == MODULE_SHUTDOWN_REQ) {
132ff4e5 BZ	140	BT_DBG("EVENT:%s", (event->data[2]) ?
	141	"Shutdown failed" : "Shutdown succeed");
	142	} else {
	143	BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
	144	ret = -EINVAL;
	145	}
	146	break;
	147
	148	case BT_EVENT_POWER_STATE:
	149	if (event->data[1] == BT_PS_SLEEP)
	150	adapter->ps_state = PS_SLEEP;
	151	BT_DBG("EVENT:%s",
	152	(adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
	153	break;
	154
	155	default:
	156	BT_DBG("Unknown Event=%d", event->data[0]);
	157	ret = -EINVAL;
	158	break;
	159	}
	160
	161	exit:
	162	if (!ret)
	163	kfree_skb(skb);
	164
132ff4e5 BZ	165	return ret;
	166	}
	167	EXPORT_SYMBOL_GPL(btmrvl_process_event);
	168
c037874c AK	169	static int btmrvl_send_sync_cmd(struct btmrvl_private *priv, u16 cmd_no,
c037874c AK	170	const void *param, u8 len)
132ff4e5	171	{
4271e08d	172	struct sk_buff *skb;
7d5b400c	173	struct hci_command_hdr *hdr;
132ff4e5	174
7d5b400c	175	skb = bt_skb_alloc(HCI_COMMAND_HDR_SIZE + len, GFP_ATOMIC);
132ff4e5 BZ	176	if (skb == NULL) {
132ff4e5 BZ	177	BT_ERR("No free skb");
9374253f	178	return -ENOMEM;
132ff4e5 BZ	179	}
132ff4e5 BZ	180
7d5b400c AK	181	hdr = (struct hci_command_hdr *)skb_put(skb, HCI_COMMAND_HDR_SIZE);
	182	hdr->opcode = cpu_to_le16(hci_opcode_pack(OGF, cmd_no));
	183	hdr->plen = len;
c037874c AK	184
c037874c AK	185	if (len)
7d5b400c	186	memcpy(skb_put(skb, len), param, len);
132ff4e5 BZ	187
	188	bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
	189
4271e08d	190	skb->dev = (void *) priv->btmrvl_dev.hcidev;
132ff4e5 BZ	191	skb_queue_head(&priv->adapter->tx_queue, skb);
	192
	193	priv->btmrvl_dev.sendcmdflag = true;
	194
	195	priv->adapter->cmd_complete = false;
	196
132ff4e5 BZ	197	wake_up_interruptible(&priv->main_thread.wait_q);
132ff4e5 BZ	198
4271e08d MH	199	if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
4271e08d MH	200	priv->adapter->cmd_complete,
c037874c AK	201	msecs_to_jiffies(WAIT_UNTIL_CMD_RESP)))
	202	return -ETIMEDOUT;
	203
	204	return 0;
	205	}
132ff4e5	206
c037874c AK	207	int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
	208	{
	209	int ret;
	210
	211	ret = btmrvl_send_sync_cmd(priv, BT_CMD_MODULE_CFG_REQ, &subcmd, 1);
	212	if (ret)
	213	BT_ERR("module_cfg_cmd(%x) failed\n", subcmd);
132ff4e5	214
132ff4e5 BZ	215	return ret;
	216	}
	217	EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
	218
2a8ff611 AK	219	int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
2a8ff611 AK	220	{
c037874c AK	221	int ret;
c037874c AK	222	u8 param[2];
2a8ff611	223
c037874c AK	224	param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
c037874c AK	225	param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
2a8ff611	226
c037874c AK	227	BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
c037874c AK	228	param[0], param[1]);
2a8ff611	229
c037874c AK	230	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
	231	if (ret)
	232	BT_ERR("HSCFG command failed\n");
2a8ff611	233
c037874c	234	return ret;
2a8ff611 AK	235	}
	236	EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
	237
32fd6398 AK	238	int btmrvl_enable_ps(struct btmrvl_private *priv)
32fd6398 AK	239	{
c037874c AK	240	int ret;
c037874c AK	241	u8 param;
32fd6398 AK	242
32fd6398 AK	243	if (priv->btmrvl_dev.psmode)
c037874c	244	param = BT_PS_ENABLE;
32fd6398	245	else
c037874c	246	param = BT_PS_DISABLE;
32fd6398	247
c037874c AK	248	ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
	249	if (ret)
	250	BT_ERR("PSMODE command failed\n");
32fd6398 AK	251
	252	return 0;
	253	}
	254	EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
	255
ba54a16f	256	int btmrvl_enable_hs(struct btmrvl_private *priv)
132ff4e5	257	{
c037874c	258	int ret;
132ff4e5	259
c037874c AK	260	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
	261	if (ret)
	262	BT_ERR("Host sleep enable command failed\n");
132ff4e5	263
132ff4e5 BZ	264	return ret;
132ff4e5 BZ	265	}
ba54a16f	266	EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
132ff4e5 BZ	267
	268	int btmrvl_prepare_command(struct btmrvl_private *priv)
	269	{
9374253f	270	int ret = 0;
132ff4e5 BZ	271
	272	if (priv->btmrvl_dev.hscfgcmd) {
	273	priv->btmrvl_dev.hscfgcmd = 0;
2a8ff611	274	btmrvl_send_hscfg_cmd(priv);
132ff4e5 BZ	275	}
	276
	277	if (priv->btmrvl_dev.pscmd) {
	278	priv->btmrvl_dev.pscmd = 0;
32fd6398	279	btmrvl_enable_ps(priv);
132ff4e5 BZ	280	}
	281
	282	if (priv->btmrvl_dev.hscmd) {
	283	priv->btmrvl_dev.hscmd = 0;
	284
	285	if (priv->btmrvl_dev.hsmode) {
	286	ret = btmrvl_enable_hs(priv);
	287	} else {
	288	ret = priv->hw_wakeup_firmware(priv);
	289	priv->adapter->hs_state = HS_DEACTIVATED;
	290	}
	291	}
	292
132ff4e5 BZ	293	return ret;
	294	}
	295
	296	static int btmrvl_tx_pkt(struct btmrvl_private priv, struct sk_buff skb)
	297	{
9374253f	298	int ret = 0;
132ff4e5	299
9374253f	300	if (!skb \|\| !skb->data)
132ff4e5	301	return -EINVAL;
132ff4e5 BZ	302
	303	if (!skb->len \|\| ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
	304	BT_ERR("Tx Error: Bad skb length %d : %d",
4271e08d	305	skb->len, BTM_UPLD_SIZE);
132ff4e5 BZ	306	return -EINVAL;
	307	}
	308
	309	if (skb_headroom(skb) < BTM_HEADER_LEN) {
	310	struct sk_buff *tmp = skb;
	311
	312	skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
	313	if (!skb) {
	314	BT_ERR("Tx Error: realloc_headroom failed %d",
	315	BTM_HEADER_LEN);
	316	skb = tmp;
132ff4e5 BZ	317	return -EINVAL;
	318	}
	319
	320	kfree_skb(tmp);
	321	}
	322
	323	skb_push(skb, BTM_HEADER_LEN);
	324
	325	/* header type: byte[3]
	326	* HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
	327	* header length: byte[2][1][0]
	328	*/
	329
	330	skb->data[0] = (skb->len & 0x0000ff);
	331	skb->data[1] = (skb->len & 0x00ff00) >> 8;
	332	skb->data[2] = (skb->len & 0xff0000) >> 16;
	333	skb->data[3] = bt_cb(skb)->pkt_type;
	334
	335	if (priv->hw_host_to_card)
	336	ret = priv->hw_host_to_card(priv, skb->data, skb->len);
	337
132ff4e5 BZ	338	return ret;
	339	}
	340
	341	static void btmrvl_init_adapter(struct btmrvl_private *priv)
	342	{
132ff4e5 BZ	343	skb_queue_head_init(&priv->adapter->tx_queue);
	344
	345	priv->adapter->ps_state = PS_AWAKE;
	346
	347	init_waitqueue_head(&priv->adapter->cmd_wait_q);
132ff4e5 BZ	348	}
	349
	350	static void btmrvl_free_adapter(struct btmrvl_private *priv)
	351	{
132ff4e5 BZ	352	skb_queue_purge(&priv->adapter->tx_queue);
	353
	354	kfree(priv->adapter);
	355
	356	priv->adapter = NULL;
132ff4e5 BZ	357	}
132ff4e5 BZ	358
4271e08d MH	359	static int btmrvl_ioctl(struct hci_dev *hdev,
4271e08d MH	360	unsigned int cmd, unsigned long arg)
132ff4e5	361	{
132ff4e5 BZ	362	return -ENOIOCTLCMD;
	363	}
	364
132ff4e5 BZ	365	static int btmrvl_send_frame(struct sk_buff *skb)
132ff4e5 BZ	366	{
4271e08d	367	struct hci_dev hdev = (struct hci_dev ) skb->dev;
132ff4e5 BZ	368	struct btmrvl_private *priv = NULL;
132ff4e5 BZ	369
9374253f	370	BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
132ff4e5	371
155961e8	372	if (!hdev) {
132ff4e5	373	BT_ERR("Frame for unknown HCI device");
132ff4e5 BZ	374	return -ENODEV;
	375	}
	376
155961e8 DH	377	priv = hci_get_drvdata(hdev);
155961e8 DH	378
132ff4e5 BZ	379	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
	380	BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
	381	print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
4271e08d	382	skb->data, skb->len);
132ff4e5 BZ	383	return -EBUSY;
	384	}
	385
	386	switch (bt_cb(skb)->pkt_type) {
	387	case HCI_COMMAND_PKT:
	388	hdev->stat.cmd_tx++;
	389	break;
	390
	391	case HCI_ACLDATA_PKT:
	392	hdev->stat.acl_tx++;
	393	break;
	394
	395	case HCI_SCODATA_PKT:
	396	hdev->stat.sco_tx++;
	397	break;
	398	}
	399
	400	skb_queue_tail(&priv->adapter->tx_queue, skb);
	401
	402	wake_up_interruptible(&priv->main_thread.wait_q);
	403
132ff4e5 BZ	404	return 0;
	405	}
	406
	407	static int btmrvl_flush(struct hci_dev *hdev)
	408	{
155961e8	409	struct btmrvl_private *priv = hci_get_drvdata(hdev);
132ff4e5	410
132ff4e5 BZ	411	skb_queue_purge(&priv->adapter->tx_queue);
132ff4e5 BZ	412
132ff4e5 BZ	413	return 0;
	414	}
	415
	416	static int btmrvl_close(struct hci_dev *hdev)
	417	{
155961e8	418	struct btmrvl_private *priv = hci_get_drvdata(hdev);
132ff4e5	419
9374253f	420	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
132ff4e5	421	return 0;
132ff4e5 BZ	422
	423	skb_queue_purge(&priv->adapter->tx_queue);
	424
132ff4e5 BZ	425	return 0;
	426	}
	427
	428	static int btmrvl_open(struct hci_dev *hdev)
	429	{
132ff4e5 BZ	430	set_bit(HCI_RUNNING, &hdev->flags);
132ff4e5 BZ	431
132ff4e5 BZ	432	return 0;
	433	}
	434
4b245722 AK	435	static int btmrvl_setup(struct hci_dev *hdev)
	436	{
	437	struct btmrvl_private *priv = hci_get_drvdata(hdev);
	438
	439	btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
	440
	441	priv->btmrvl_dev.psmode = 1;
	442	btmrvl_enable_ps(priv);
	443
	444	priv->btmrvl_dev.gpio_gap = 0xffff;
	445	btmrvl_send_hscfg_cmd(priv);
	446
	447	return 0;
	448	}
	449
132ff4e5 BZ	450	/*
	451	* This function handles the event generated by firmware, rx data
	452	* received from firmware, and tx data sent from kernel.
	453	*/
	454	static int btmrvl_service_main_thread(void *data)
	455	{
	456	struct btmrvl_thread *thread = data;
	457	struct btmrvl_private *priv = thread->priv;
	458	struct btmrvl_adapter *adapter = priv->adapter;
	459	wait_queue_t wait;
	460	struct sk_buff *skb;
	461	ulong flags;
	462
132ff4e5 BZ	463	init_waitqueue_entry(&wait, current);
132ff4e5 BZ	464
132ff4e5 BZ	465	for (;;) {
	466	add_wait_queue(&thread->wait_q, &wait);
	467
	468	set_current_state(TASK_INTERRUPTIBLE);
ea05fea9 DD	469	if (kthread_should_stop()) {
	470	BT_DBG("main_thread: break from main thread");
	471	break;
	472	}
132ff4e5 BZ	473
132ff4e5 BZ	474	if (adapter->wakeup_tries \|\|
4271e08d MH	475	((!adapter->int_count) &&
	476	(!priv->btmrvl_dev.tx_dnld_rdy \|\|
	477	skb_queue_empty(&adapter->tx_queue)))) {
132ff4e5 BZ	478	BT_DBG("main_thread is sleeping...");
	479	schedule();
	480	}
	481
	482	set_current_state(TASK_RUNNING);
	483
	484	remove_wait_queue(&thread->wait_q, &wait);
	485
	486	BT_DBG("main_thread woke up");
	487
132ff4e5 BZ	488	spin_lock_irqsave(&priv->driver_lock, flags);
	489	if (adapter->int_count) {
	490	adapter->int_count = 0;
d1d10d78 AK	491	spin_unlock_irqrestore(&priv->driver_lock, flags);
d1d10d78 AK	492	priv->hw_process_int_status(priv);
4271e08d MH	493	} else if (adapter->ps_state == PS_SLEEP &&
4271e08d MH	494	!skb_queue_empty(&adapter->tx_queue)) {
132ff4e5 BZ	495	spin_unlock_irqrestore(&priv->driver_lock, flags);
	496	adapter->wakeup_tries++;
	497	priv->hw_wakeup_firmware(priv);
	498	continue;
d1d10d78 AK	499	} else {
d1d10d78 AK	500	spin_unlock_irqrestore(&priv->driver_lock, flags);
132ff4e5	501	}
132ff4e5 BZ	502
	503	if (adapter->ps_state == PS_SLEEP)
	504	continue;
	505
	506	if (!priv->btmrvl_dev.tx_dnld_rdy)
	507	continue;
	508
	509	skb = skb_dequeue(&adapter->tx_queue);
	510	if (skb) {
	511	if (btmrvl_tx_pkt(priv, skb))
	512	priv->btmrvl_dev.hcidev->stat.err_tx++;
	513	else
4271e08d	514	priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
132ff4e5 BZ	515
	516	kfree_skb(skb);
	517	}
	518	}
	519
132ff4e5 BZ	520	return 0;
	521	}
	522
64061607	523	int btmrvl_register_hdev(struct btmrvl_private *priv)
132ff4e5 BZ	524	{
132ff4e5 BZ	525	struct hci_dev *hdev = NULL;
132ff4e5 BZ	526	int ret;
132ff4e5 BZ	527
132ff4e5 BZ	528	hdev = hci_alloc_dev();
	529	if (!hdev) {
	530	BT_ERR("Can not allocate HCI device");
	531	goto err_hdev;
	532	}
	533
132ff4e5	534	priv->btmrvl_dev.hcidev = hdev;
155961e8	535	hci_set_drvdata(hdev, priv);
132ff4e5	536
c13854ce	537	hdev->bus = HCI_SDIO;
132ff4e5 BZ	538	hdev->open = btmrvl_open;
	539	hdev->close = btmrvl_close;
	540	hdev->flush = btmrvl_flush;
	541	hdev->send = btmrvl_send_frame;
132ff4e5	542	hdev->ioctl = btmrvl_ioctl;
4b245722	543	hdev->setup = btmrvl_setup;
64061607	544
f120c6b6 BZ	545	hdev->dev_type = priv->btmrvl_dev.dev_type;
f120c6b6 BZ	546
132ff4e5 BZ	547	ret = hci_register_dev(hdev);
	548	if (ret < 0) {
	549	BT_ERR("Can not register HCI device");
	550	goto err_hci_register_dev;
	551	}
	552
fb784f05 BZ	553	#ifdef CONFIG_DEBUG_FS
	554	btmrvl_debugfs_init(hdev);
	555	#endif
	556
64061607	557	return 0;
132ff4e5 BZ	558
132ff4e5 BZ	559	err_hci_register_dev:
132ff4e5 BZ	560	hci_free_dev(hdev);
	561
	562	err_hdev:
64061607 BZ	563	/* Stop the thread servicing the interrupts */
	564	kthread_stop(priv->main_thread.task);
	565
132ff4e5	566	btmrvl_free_adapter(priv);
64061607 BZ	567	kfree(priv);
	568
	569	return -ENOMEM;
	570	}
	571	EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
	572
	573	struct btmrvl_private btmrvl_add_card(void card)
	574	{
	575	struct btmrvl_private *priv;
	576
	577	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	578	if (!priv) {
	579	BT_ERR("Can not allocate priv");
	580	goto err_priv;
	581	}
	582
	583	priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
	584	if (!priv->adapter) {
	585	BT_ERR("Allocate buffer for btmrvl_adapter failed!");
	586	goto err_adapter;
	587	}
	588
	589	btmrvl_init_adapter(priv);
	590
	591	BT_DBG("Starting kthread...");
	592	priv->main_thread.priv = priv;
	593	spin_lock_init(&priv->driver_lock);
	594
	595	init_waitqueue_head(&priv->main_thread.wait_q);
	596	priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
	597	&priv->main_thread, "btmrvl_main_service");
	598
	599	priv->btmrvl_dev.card = card;
	600	priv->btmrvl_dev.tx_dnld_rdy = true;
	601
	602	return priv;
132ff4e5 BZ	603
	604	err_adapter:
	605	kfree(priv);
	606
	607	err_priv:
132ff4e5 BZ	608	return NULL;
	609	}
	610	EXPORT_SYMBOL_GPL(btmrvl_add_card);
	611
	612	int btmrvl_remove_card(struct btmrvl_private *priv)
	613	{
	614	struct hci_dev *hdev;
	615
132ff4e5 BZ	616	hdev = priv->btmrvl_dev.hcidev;
	617
	618	wake_up_interruptible(&priv->adapter->cmd_wait_q);
	619
	620	kthread_stop(priv->main_thread.task);
	621
fb784f05 BZ	622	#ifdef CONFIG_DEBUG_FS
	623	btmrvl_debugfs_remove(hdev);
	624	#endif
	625
132ff4e5 BZ	626	hci_unregister_dev(hdev);
	627
	628	hci_free_dev(hdev);
	629
	630	priv->btmrvl_dev.hcidev = NULL;
	631
	632	btmrvl_free_adapter(priv);
	633
	634	kfree(priv);
	635
132ff4e5 BZ	636	return 0;
	637	}
	638	EXPORT_SYMBOL_GPL(btmrvl_remove_card);
	639
	640	MODULE_AUTHOR("Marvell International Ltd.");
9666fb35	641	MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
132ff4e5 BZ	642	MODULE_VERSION(VERSION);
132ff4e5 BZ	643	MODULE_LICENSE("GPL v2");