path: root/drivers/net/wireless/rt2x00/rt2800usb.c

/*
	Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
	Copyright (C) 2009 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
	Copyright (C) 2009 Mattias Nissler <mattias.nissler@gmx.de>
	Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
	Copyright (C) 2009 Xose Vazquez Perez <xose.vazquez@gmail.com>
	Copyright (C) 2009 Axel Kollhofer <rain_maker@root-forum.org>
	<http://rt2x00.serialmonkey.com>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the
	Free Software Foundation, Inc.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2800usb
	Abstract: rt2800usb device specific routines.
	Supported chipsets: RT2800U.
 */

#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>

#include "rt2x00.h"
#include "rt2x00usb.h"
#include "rt2800lib.h"
#include "rt2800.h"
#include "rt2800usb.h"

/*
 * Allow hardware encryption to be disabled.
 */
static int modparam_nohwcrypt;
module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");

/*
 * Queue handlers.
 */
static void rt2800usb_start_queue(struct data_queue *queue)
{
	struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
	u32 reg;

	switch (queue->qid) {
	case QID_RX:
		rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
		rt2x00_set_field32(&reg, MAC_SYS_CTRL_ENABLE_RX, 1);
		rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
		break;
	case QID_BEACON:
		rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
		rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 1);
		rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE, 1);
		rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 1);
		rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
		break;
	default:
		break;
	}
}

static void rt2800usb_stop_queue(struct data_queue *queue)
{
	struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
	u32 reg;

	switch (queue->qid) {
	case QID_RX:
		rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
		rt2x00_set_field32(&reg, MAC_SYS_CTRL_ENABLE_RX, 0);
		rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
		break;
	case QID_BEACON:
		rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
		rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 0);
		rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE, 0);
		rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 0);
		rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
		break;
	default:
		break;
	}
}

/*
 * Firmware functions
 */
static char *rt2800usb_get_firmware_name(struct rt2x00_dev *rt2x00dev)
{
	return FIRMWARE_RT2870;
}

static int rt2800usb_write_firmware(struct rt2x00_dev *rt2x00dev,
				    const u8 *data, const size_t len)
{
	int status;
	u32 offset;
	u32 length;

	/*
	 * Check which section of the firmware we need.
	 */
	if (rt2x00_rt(rt2x00dev, RT2860) ||
	    rt2x00_rt(rt2x00dev, RT2872) ||
	    rt2x00_rt(rt2x00dev, RT3070)) {
		offset = 0;
		length = 4096;
	} else {
		offset = 4096;
		length = 4096;
	}

	/*
	 * Write firmware to device.
	 */
	rt2800_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE,
				   data + offset, length);

	rt2800_register_write(rt2x00dev, H2M_MAILBOX_CID, ~0);
	rt2800_register_write(rt2x00dev, H2M_MAILBOX_STATUS, ~0);

	/*
	 * Send firmware request to device to load firmware,
	 * we need to specify a long timeout time.
	 */
	status = rt2x00usb_vendor_request_sw(rt2x00dev, USB_DEVICE_MODE,
					     0, USB_MODE_FIRMWARE,
					     REGISTER_TIMEOUT_FIRMWARE);
	if (status < 0) {
		ERROR(rt2x00dev, "Failed to write Firmware to device.\n");
		return status;
	}

	msleep(10);
	rt2800_register_write(rt2x00dev, H2M_MAILBOX_CSR, 0);

	return 0;
}

/*
 * Device state switch handlers.
 */
static int rt2800usb_init_registers(struct rt2x00_dev *rt2x00dev)
{
	u32 reg;

	/*
	 * Wait until BBP and RF are ready.
	 */
	if (rt2800_wait_csr_ready(rt2x00dev))
		return -EBUSY;

	rt2800_register_read(rt2x00dev, PBF_SYS_CTRL, &reg);
	rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, reg & ~0x00002000);

	rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000003);

	rt2800_register_read(rt2x00dev, MAC_SYS_CTRL,