path: root/drivers/net/wireless/rtl8187_rtl8225.c

/*
 * Radio tuning for RTL8225 on RTL8187
 *
 * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
 * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
 *
 * Based on the r8187 driver, which is:
 * Copyright 2005 Andrea Merello <andreamrl@tiscali.it>, et al.
 *
 * Magic delays, register offsets, and phy value tables below are
 * taken from the original r8187 driver sources.  Thanks to Realtek
 * for their support!
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/usb.h>
#include <net/mac80211.h>

#include "rtl8187.h"
#include "rtl8187_rtl8225.h"

static void rtl8225_write_bitbang(struct ieee80211_hw *dev, u8 addr, u16 data)
{
	struct rtl8187_priv *priv = dev->priv;
	u16 reg80, reg84, reg82;
	u32 bangdata;
	int i;

	bangdata = (data << 4) | (addr & 0xf);

	reg80 = rtl818x_ioread16(priv, &priv->map->RFPinsOutput) & 0xfff3;
	reg82 = rtl818x_ioread16(priv, &priv->map->RFPinsEnable);

	rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, reg82 | 0x7);

	reg84 = rtl818x_ioread16(priv, &priv->map->RFPinsSelect);
	rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, reg84 | 0x7);
	udelay(10);

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80 | (1 << 2));
	udelay(2);
	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80);
	udelay(10);

	for (i = 15; i >= 0; i--) {
		u16 reg = reg80 | (bangdata & (1 << i)) >> i;

		if (i & 1)
			rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg);

		rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg | (1 << 1));
		rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg | (1 << 1));

		if (!(i & 1))
			rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg);
	}

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80 | (1 << 2));
	udelay(10);

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80 | (1 << 2));
	rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, reg84);
	msleep(2);
}

static void rtl8225_write_8051(struct ieee80211_hw *dev, u8 addr, __le16 data)
{
	struct rtl8187_priv *priv = dev->priv;
	u16 reg80, reg82, reg84;

	reg80 = rtl818x_ioread16(priv, &priv->map->RFPinsOutput);
	reg82 = rtl818x_ioread16(priv, &priv->map->RFPinsEnable);
	reg84 = rtl818x_ioread16(priv, &priv->map->RFPinsSelect);

	reg80 &= ~(0x3 << 2);
	reg84 &= ~0xF;

	rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, reg82 | 0x0007);
	rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, reg84 | 0x0007);
	udelay(10);

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80 | (1 << 2));
	udelay(2);

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80);
	udelay(10);

	usb_control_msg(priv->udev, usb_sndctrlpipe(priv->udev, 0),
			RTL8187_REQ_SET_REG, RTL8187_REQT_WRITE,
			addr, 0x8225, &data, sizeof(data), HZ / 2);

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80 | (1 << 2));
	udelay(10);

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80 | (1 << 2));
	rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, reg84);
	msleep(2);
}

static void rtl8225_write(struct ieee80211_hw *dev, u8 addr, u16 data)