rtl8187_rtl8225.c

linux 内核源代码

/*
 * Radio tuning for RTL8225 on RTL8187
 *
 * Copyright 2007 Michael Wu <[e-mail]>
 * Copyright 2007 Andrea Merello <[e-mail]>
 *
 * Based on the r8187 driver, which is:
 * Copyright 2005 Andrea Merello <[e-mail]>, 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);
}

void rtl8225_write(struct ieee80211_hw *dev, u8 addr, u16 data)
{
	struct rtl8187_priv *priv = dev->priv;

	if (priv->asic_rev)
		rtl8225_write_8051(dev, addr, cpu_to_le16(data));
	else
		rtl8225_write_bitbang(dev, addr, data);
}

u16 rtl8225_read(struct ieee80211_hw *dev, u8 addr)
{
	struct rtl8187_priv *priv = dev->priv;
	u16 reg80, reg82, reg84, out;
	int i;

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

	reg80 &= ~0xF;

	rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, reg82 | 0x000F);
	rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, reg84 | 0x000F);

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80 | (1 << 2));
	udelay(4);
	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, reg80);
	udelay(5);

	for (i = 4; i >= 0; i--) {
		u16 reg = reg80 | ((addr >> i) & 1);

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

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

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

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
			  reg80 | (1 << 3) | (1 << 1));
	udelay(2);
	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
			  reg80 | (1 << 3));
	udelay(2);
	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
			  reg80 | (1 << 3));
	udelay(2);

	out = 0;
	for (i = 11; i >= 0; i--) {
		rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
				  reg80 | (1 << 3));
		udelay(1);
		rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
				  reg80 | (1 << 3) | (1 << 1));
		udelay(2);
		rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
				  reg80 | (1 << 3) | (1 << 1));
		udelay(2);
		rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
				  reg80 | (1 << 3) | (1 << 1));
		udelay(2);

		if (rtl818x_ioread16(priv, &priv->map->RFPinsInput) & (1 << 1))
			out |= 1 << i;

		rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
				  reg80 | (1 << 3));
		udelay(2);
	}

	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput,
			  reg80 | (1 << 3) | (1 << 2));
	udelay(2);

	rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, reg82);
	rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, reg84);
	rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x03A0);

	return out;
}

static const u16 rtl8225bcd_rxgain[] = {
	0x0400, 0x0401, 0x0402, 0x0403, 0x0404, 0x0405, 0x0408, 0x0409,
	0x040a, 0x040b, 0x0502, 0x0503, 0x0504, 0x0505, 0x0540, 0x0541,
	0x0542, 0x0543, 0x0544, 0x0545, 0x0580, 0x0581, 0x0582, 0x0583,
	0x0584, 0x0585, 0x0588, 0x0589, 0x058a, 0x058b, 0x0643, 0x0644,
	0x0645, 0x0680, 0x0681, 0x0682, 0x0683, 0x0684, 0x0685, 0x0688,
	0x0689, 0x068a, 0x068b, 0x068c, 0x0742, 0x0743, 0x0744, 0x0745,
	0x0780, 0x0781, 0x0782, 0x0783, 0x0784, 0x0785, 0x0788, 0x0789,
	0x078a, 0x078b, 0x078c, 0x078d, 0x0790, 0x0791, 0x0792, 0x0793,
	0x0794, 0x0795, 0x0798, 0x0799, 0x079a, 0x079b, 0x079c, 0x079d,
	0x07a0, 0x07a1, 0x07a2, 0x07a3, 0x07a4, 0x07a5, 0x07a8, 0x07a9,
	0x07aa, 0x07ab, 0x07ac, 0x07ad, 0x07b0, 0x07b1, 0x07b2, 0x07b3,
	0x07b4, 0x07b5, 0x07b8, 0x07b9, 0x07ba, 0x07bb, 0x07bb
};

static const u8 rtl8225_agc[] = {
	0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e,
	0x9d, 0x9c, 0x9b, 0x9a, 0x99, 0x98, 0x97, 0x96,
	0x95, 0x94, 0x93, 0x92, 0x91, 0x90, 0x8f, 0x8e,
	0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x88, 0x87, 0x86,
	0x85, 0x84, 0x83, 0x82, 0x81, 0x80, 0x3f, 0x3e,
	0x3d, 0x3c, 0x3b, 0x3a, 0x39, 0x38, 0x37, 0x36,
	0x35, 0x34, 0x33, 0x32, 0x31, 0x30, 0x2f, 0x2e,
	0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28, 0x27, 0x26,
	0x25, 0x24, 0x23, 0x22, 0x21, 0x20, 0x1f, 0x1e,
	0x1d, 0x1c, 0x1b, 0x1a, 0x19, 0x18, 0x17, 0x16,
	0x15, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0x0e,
	0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08, 0x07, 0x06,
	0x05, 0x04, 0x03, 0x02, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
};

static const u8 rtl8225_gain[] = {
	0x23, 0x88, 0x7c, 0xa5,	/* -82dBm */
	0x23, 0x88, 0x7c, 0xb5,	/* -82dBm */
	0x23, 0x88, 0x7c, 0xc5,	/* -82dBm */
	0x33, 0x80, 0x79, 0xc5,	/* -78dBm */
	0x43, 0x78, 0x76, 0xc5,	/* -74dBm */
	0x53, 0x60, 0x73, 0xc5,	/* -70dBm */
	0x63, 0x58, 0x70, 0xc5,	/* -66dBm */
};

static const u8 rtl8225_threshold[] = {
	0x8d, 0x8d, 0x8d, 0x8d, 0x9d, 0xad, 0xbd
};

static const u8 rtl8225_tx_gain_cck_ofdm[] = {
	0x02, 0x06, 0x0e, 0x1e, 0x3e, 0x7e
};

static const u8 rtl8225_tx_power_cck[] = {
	0x18, 0x17, 0x15, 0x11, 0x0c, 0x08, 0x04, 0x02,
	0x1b, 0x1a, 0x17, 0x13, 0x0e, 0x09, 0x04, 0x02,
	0x1f, 0x1e, 0x1a, 0x15, 0x10, 0x0a, 0x05, 0x02,
	0x22, 0x21, 0x1d, 0x18, 0x11, 0x0b, 0x06, 0x02,
	0x26, 0x25, 0x21, 0x1b, 0x14, 0x0d, 0x06, 0x03,
	0x2b, 0x2a, 0x25, 0x1e, 0x16, 0x0e, 0x07, 0x03
};

static const u8 rtl8225_tx_power_cck_ch14[] = {
	0x18, 0x17, 0x15, 0x0c, 0x00, 0x00, 0x00, 0x00,
	0x1b, 0x1a, 0x17, 0x0e, 0x00, 0x00, 0x00, 0x00,
	0x1f, 0x1e, 0x1a, 0x0f, 0x00, 0x00, 0x00, 0x00,
	0x22, 0x21, 0x1d, 0x11, 0x00, 0x00, 0x00, 0x00,
	0x26, 0x25, 0x21, 0x13, 0x00, 0x00, 0x00, 0x00,
	0x2b, 0x2a, 0x25, 0x15, 0x00, 0x00, 0x00, 0x00
};

static const u8 rtl8225_tx_power_ofdm[] = {
	0x80, 0x90, 0xa2, 0xb5, 0xcb, 0xe4
};

static const u32 rtl8225_chan[] = {
	0x085c, 0x08dc, 0x095c, 0x09dc, 0x0a5c, 0x0adc, 0x0b5c,
	0x0bdc, 0x0c5c, 0x0cdc, 0x0d5c, 0x0ddc, 0x0e5c, 0x0f72
};

static void rtl8225_rf_set_tx_power(struct ieee80211_hw *dev, int channel)
{
	struct rtl8187_priv *priv = dev->priv;
	u8 cck_power, ofdm_power;
	const u8 *tmp;
	u32 reg;
	int i;

	cck_power = priv->channels[channel - 1].val & 0xF;
	ofdm_power = priv->channels[channel - 1].val >> 4;

	cck_power = min(cck_power, (u8)11);
	ofdm_power = min(ofdm_power, (u8)35);

	rtl818x_iowrite8(priv, &priv->map->TX_GAIN_CCK,
			 rtl8225_tx_gain_cck_ofdm[cck_power / 6] >> 1);

	if (channel == 14)
		tmp = &rtl8225_tx_power_cck_ch14[(cck_power % 6) * 8];
	else
		tmp = &rtl8225_tx_power_cck[(cck_power % 6) * 8];

	for (i = 0; i < 8; i++)
		rtl8225_write_phy_cck(dev, 0x44 + i, *tmp++);

	msleep(1); // FIXME: optional?

	/* anaparam2 on */
	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
	reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
	rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
	rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
	rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

	rtl8225_write_phy_ofdm(dev, 2, 0x42);
	rtl8225_write_phy_ofdm(dev, 6, 0x00);
	rtl8225_write_phy_ofdm(dev, 8, 0x00);

	rtl818x_iowrite8(priv, &priv->map->TX_GAIN_OFDM,
			 rtl8225_tx_gain_cck_ofdm[ofdm_power / 6] >> 1);

	tmp = &rtl8225_tx_power_ofdm[ofdm_power % 6];

	rtl8225_write_phy_ofdm(dev, 5, *tmp);
	rtl8225_write_phy_ofdm(dev, 7, *tmp);

	msleep(1);
}

void rtl8225_rf_init(struct ieee80211_hw *dev)
{
	struct rtl8187_priv *priv = dev->priv;
	int i;

	rtl8225_write(dev, 0x0, 0x067); msleep(1);
	rtl8225_write(dev, 0x1, 0xFE0); msleep(1);
	rtl8225_write(dev, 0x2, 0x44D); msleep(1);
	rtl8225_write(dev, 0x3, 0x441); msleep(1);
	rtl8225_write(dev, 0x4, 0x486); msleep(1);
	rtl8225_write(dev, 0x5, 0xBC0); msleep(1);
	rtl8225_write(dev, 0x6, 0xAE6); msleep(1);
	rtl8225_write(dev, 0x7, 0x82A); msleep(1);
	rtl8225_write(dev, 0x8, 0x01F); msleep(1);
	rtl8225_write(dev, 0x9, 0x334); msleep(1);
	rtl8225_write(dev, 0xA, 0xFD4); msleep(1);
	rtl8225_write(dev, 0xB, 0x391); msleep(1);
	rtl8225_write(dev, 0xC, 0x050); msleep(1);
	rtl8225_write(dev, 0xD, 0x6DB); msleep(1);
	rtl8225_write(dev, 0xE, 0x029); msleep(1);
	rtl8225_write(dev, 0xF, 0x914); msleep(100);

	rtl8225_write(dev, 0x2, 0xC4D); msleep(200);
	rtl8225_write(dev, 0x2, 0x44D); msleep(200);

	if (!(rtl8225_read(dev, 6) & (1 << 7))) {
		rtl8225_write(dev, 0x02, 0x0c4d);
		msleep(200);
		rtl8225_write(dev, 0x02, 0x044d);
		msleep(100);
		if (!(rtl8225_read(dev, 6) & (1 << 7)))
			printk(KERN_WARNING "%s: RF Calibration Failed! %x\n",
			       wiphy_name(dev->wiphy), rtl8225_read(dev, 6));
	}

	rtl8225_write(dev, 0x0, 0x127);

	for (i = 0; i < ARRAY_SIZE(rtl8225bcd_rxgain); i++) {
		rtl8225_write(dev, 0x1, i + 1);
		rtl8225_write(dev, 0x2, rtl8225bcd_rxgain[i]);
	}

	rtl8225_write(dev, 0x0, 0x027);
	rtl8225_write(dev, 0x0, 0x22F);

	for (i = 0; i < ARRAY_SIZE(rtl8225_agc); i++) {