path: root/drivers/net/wireless/rtl818x/rtl8180/dev.c

/*
 * Linux device driver for RTL8180 / RTL8185
 *
 * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
 * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
 *
 * Based on the r8180 driver, which is:
 * Copyright 2004-2005 Andrea Merello <andreamrl@tiscali.it>, et al.
 *
 * 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/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/eeprom_93cx6.h>
#include <linux/module.h>
#include <net/mac80211.h>

#include "rtl8180.h"
#include "rtl8225.h"
#include "sa2400.h"
#include "max2820.h"
#include "grf5101.h"

MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_AUTHOR("Andrea Merello <andreamrl@tiscali.it>");
MODULE_DESCRIPTION("RTL8180 / RTL8185 PCI wireless driver");
MODULE_LICENSE("GPL");

static DEFINE_PCI_DEVICE_TABLE(rtl8180_table) = {
	/* rtl8185 */
	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8185) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BELKIN, 0x700f) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BELKIN, 0x701f) },

	/* rtl8180 */
	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8180) },
	{ PCI_DEVICE(0x1799, 0x6001) },
	{ PCI_DEVICE(0x1799, 0x6020) },
	{ PCI_DEVICE(PCI_VENDOR_ID_DLINK, 0x3300) },
	{ }
};

MODULE_DEVICE_TABLE(pci, rtl8180_table);

static const struct ieee80211_rate rtl818x_rates[] = {
	{ .bitrate = 10, .hw_value = 0, },
	{ .bitrate = 20, .hw_value = 1, },
	{ .bitrate = 55, .hw_value = 2, },
	{ .bitrate = 110, .hw_value = 3, },
	{ .bitrate = 60, .hw_value = 4, },
	{ .bitrate = 90, .hw_value = 5, },
	{ .bitrate = 120, .hw_value = 6, },
	{ .bitrate = 180, .hw_value = 7, },
	{ .bitrate = 240, .hw_value = 8, },
	{ .bitrate = 360, .hw_value = 9, },
	{ .bitrate = 480, .hw_value = 10, },
	{ .bitrate = 540, .hw_value = 11, },
};

static const struct ieee80211_channel rtl818x_channels[] = {
	{ .center_freq = 2412 },
	{ .center_freq = 2417 },
	{ .center_freq = 2422 },
	{ .center_freq = 2427 },
	{ .center_freq = 2432 },
	{ .center_freq = 2437 },
	{ .center_freq = 2442 },
	{ .center_freq = 2447 },
	{ .center_freq = 2452 },
	{ .center_freq = 2457 },
	{ .center_freq = 2462 },
	{ .center_freq = 2467 },
	{ .center_freq = 2472 },
	{ .center_freq = 2484 },
};


void rtl8180_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
{
	struct rtl8180_priv *priv = dev->priv;
	int i = 10;
	u32 buf;

	buf = (data << 8) | addr;

	rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->PHY[0], buf | 0x80);
	while (i--) {
		rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->PHY[0], buf);
		if (rtl818x_ioread8(priv, &priv->map->PHY[2]) == (data & 0xFF))
			return;
	}
}

static void rtl8180_handle_rx(struct ieee80211_hw *dev)
{
	struct rtl8180_priv *priv = dev->priv;
	unsigned int count = 32;
	u8 signal, agc, sq;

	while (count--) {
		struct rtl8180_rx_desc *entry = &priv->rx_ring[priv->rx_idx];
		struct sk_buff *skb = priv->rx_buf[priv->rx_idx];
		u32 flags = le32_to_cpu(entry->flags);

		if (flags & RTL818X_RX_DESC_FLAG_OWN)
			return;

		if (unlikely(flags & (RTL818X_RX_DESC_FLAG_DMA_FAIL |
				      RTL818X_RX_DESC_FLAG_FOF |
				      RTL818X_RX_DESC_FLAG_RX_ERR)))
			goto done;
		else {
			u32 flags2 = le32_to_cpu(entry->flags2);
			struct ieee80211_rx_status rx_status = {0};
			struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_SIZE);

			if (unlikely(!new_skb))
				goto done;

			pci_unmap_single(priv->pdev,
					 *((dma_addr_t *)skb->cb),
					 MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
			skb_put(skb, flags & 0xFFF);

			rx_status.antenna = (flags2 >> 15) & 1;
			rx_status.rate_idx = (flags >> 20) & 0xF;
			agc = (flags2 >> 17) & 0x7F;
			if (priv->r8185) {
				if (rx_status.rate_idx > 3)
					signal = 90 - clamp_t(u8, agc, 25, 90);
				else
					signal = 95 - clamp_t(u8, agc, 30, 95);
			} else {
				sq = flags2 & 0xff;
				signal = priv->rf->calc_rssi(agc, sq);
			}
			rx_status.signal = signal;
			rx_status.freq = dev->conf.channel->center_freq;
			rx_status.band = dev->conf.channel->band;
			rx_status.mactime = le64_to_cpu(entry->tsft);
			rx_status.flag |= RX_FLAG_MACTIME_MPDU;
			if (flags & RTL818X_RX_DESC_FLAG_CRC32_ERR)
				rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;

			memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
			ieee80211_rx_irqsafe(dev, skb);

			skb = new_skb;
			priv->rx_buf[priv->rx_idx] = skb;
			*((dma_addr_t *) skb->cb) =
				pci_map_single(priv->pde