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android_kernel_xiaomi_sm8350/drivers/net/wireless/p54common.c
Johannes Berg c2f2d3a06f p54: fix eeprom parser length sanity checks 
When I called p54_parse_eeprom() on a hand-coded structure
I managed to make a small mistake with wrap->len which caused
a segfault a few lines down when trying to read entry->len.
This patch changes the validation code to avoid such problems.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-04 18:36:36 -05:00

1026 lines
28 KiB
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/*
* Common code for mac80211 Prism54 drivers
*
* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
* Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
*
* Based on the islsm (softmac prism54) driver, which is:
* Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
*
* 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/firmware.h>
#include <linux/etherdevice.h>
#include <net/mac80211.h>
#include "p54.h"
#include "p54common.h"
MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_DESCRIPTION("Softmac Prism54 common code");
MODULE_LICENSE("GPL");
MODULE_ALIAS("prism54common");
void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
{
struct p54_common *priv = dev->priv;
struct bootrec_exp_if *exp_if;
struct bootrec *bootrec;
u32 *data = (u32 *)fw->data;
u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
u8 *fw_version = NULL;
size_t len;
int i;
if (priv->rx_start)
return;
while (data < end_data && *data)
data++;
while (data < end_data && !*data)
data++;
bootrec = (struct bootrec *) data;
while (bootrec->data <= end_data &&
(bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
u32 code = le32_to_cpu(bootrec->code);
switch (code) {
case BR_CODE_COMPONENT_ID:
switch (be32_to_cpu(*(__be32 *)bootrec->data)) {
case FW_FMAC:
printk(KERN_INFO "p54: FreeMAC firmware\n");
break;
case FW_LM20:
printk(KERN_INFO "p54: LM20 firmware\n");
break;
case FW_LM86:
printk(KERN_INFO "p54: LM86 firmware\n");
break;
case FW_LM87:
printk(KERN_INFO "p54: LM87 firmware - not supported yet!\n");
break;
default:
printk(KERN_INFO "p54: unknown firmware\n");
break;
}
break;
case BR_CODE_COMPONENT_VERSION:
/* 24 bytes should be enough for all firmwares */
if (strnlen((unsigned char*)bootrec->data, 24) < 24)
fw_version = (unsigned char*)bootrec->data;
break;
case BR_CODE_DESCR:
priv->rx_start = le32_to_cpu(((__le32 *)bootrec->data)[1]);
/* FIXME add sanity checking */
priv->rx_end = le32_to_cpu(((__le32 *)bootrec->data)[2]) - 0x3500;
break;
case BR_CODE_EXPOSED_IF:
exp_if = (struct bootrec_exp_if *) bootrec->data;
for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
if (exp_if[i].if_id == cpu_to_le16(0x1a))
priv->fw_var = le16_to_cpu(exp_if[i].variant);
break;
case BR_CODE_DEPENDENT_IF:
break;
case BR_CODE_END_OF_BRA:
case LEGACY_BR_CODE_END_OF_BRA:
end_data = NULL;
break;
default:
break;
}
bootrec = (struct bootrec *)&bootrec->data[len];
}
if (fw_version)
printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
if (priv->fw_var >= 0x300) {
/* Firmware supports QoS, use it! */
priv->tx_stats.data[0].limit = 3;
priv->tx_stats.data[1].limit = 4;
priv->tx_stats.data[2].limit = 3;
priv->tx_stats.data[3].limit = 1;
dev->queues = 4;
}
}
EXPORT_SYMBOL_GPL(p54_parse_firmware);
static int p54_convert_rev0_to_rev1(struct ieee80211_hw *dev,
struct pda_pa_curve_data *curve_data)
{
struct p54_common *priv = dev->priv;
struct pda_pa_curve_data_sample_rev1 *rev1;
struct pda_pa_curve_data_sample_rev0 *rev0;
size_t cd_len = sizeof(*curve_data) +
(curve_data->points_per_channel*sizeof(*rev1) + 2) *
curve_data->channels;
unsigned int i, j;
void *source, *target;
priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
if (!priv->curve_data)
return -ENOMEM;
memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
source = curve_data->data;
target = priv->curve_data->data;
for (i = 0; i < curve_data->channels; i++) {
__le16 *freq = source;
source += sizeof(__le16);
*((__le16 *)target) = *freq;
target += sizeof(__le16);
for (j = 0; j < curve_data->points_per_channel; j++) {
rev1 = target;
rev0 = source;
rev1->rf_power = rev0->rf_power;
rev1->pa_detector = rev0->pa_detector;
rev1->data_64qam = rev0->pcv;
/* "invent" the points for the other modulations */
#define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
rev1->data_16qam = SUB(rev0->pcv, 12);
rev1->data_qpsk = SUB(rev1->data_16qam, 12);
rev1->data_bpsk = SUB(rev1->data_qpsk, 12);
rev1->data_barker= SUB(rev1->data_bpsk, 14);
#undef SUB
target += sizeof(*rev1);
source += sizeof(*rev0);
}
}
return 0;
}
int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
{
struct p54_common *priv = dev->priv;
struct eeprom_pda_wrap *wrap = NULL;
struct pda_entry *entry;
unsigned int data_len, entry_len;
void *tmp;
int err;
u8 *end = (u8 *)eeprom + len;
wrap = (struct eeprom_pda_wrap *) eeprom;
entry = (void *)wrap->data + le16_to_cpu(wrap->len);
/* verify that at least the entry length/code fits */
while ((u8 *)entry <= end - sizeof(*entry)) {
entry_len = le16_to_cpu(entry->len);
data_len = ((entry_len - 1) << 1);
/* abort if entry exceeds whole structure */
if ((u8 *)entry + sizeof(*entry) + data_len > end)
break;
switch (le16_to_cpu(entry->code)) {
case PDR_MAC_ADDRESS:
SET_IEEE80211_PERM_ADDR(dev, entry->data);
break;
case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
if (data_len < 2) {
err = -EINVAL;
goto err;
}
if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
err = -EINVAL;
goto err;
}
priv->output_limit = kmalloc(entry->data[1] *
sizeof(*priv->output_limit), GFP_KERNEL);
if (!priv->output_limit) {
err = -ENOMEM;
goto err;
}
memcpy(priv->output_limit, &entry->data[2],
entry->data[1]*sizeof(*priv->output_limit));
priv->output_limit_len = entry->data[1];
break;
case PDR_PRISM_PA_CAL_CURVE_DATA:
if (data_len < sizeof(struct pda_pa_curve_data)) {
err = -EINVAL;
goto err;
}
if (((struct pda_pa_curve_data *)entry->data)->cal_method_rev) {
priv->curve_data = kmalloc(data_len, GFP_KERNEL);
if (!priv->curve_data) {
err = -ENOMEM;
goto err;
}
memcpy(priv->curve_data, entry->data, data_len);
} else {
err = p54_convert_rev0_to_rev1(dev, (struct pda_pa_curve_data *)entry->data);
if (err)
goto err;
}
break;
case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
if (!priv->iq_autocal) {
err = -ENOMEM;
goto err;
}
memcpy(priv->iq_autocal, entry->data, data_len);
priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
break;
case PDR_INTERFACE_LIST:
tmp = entry->data;
while ((u8 *)tmp < entry->data + data_len) {
struct bootrec_exp_if *exp_if = tmp;
if (le16_to_cpu(exp_if->if_id) == 0xF)
priv->rxhw = exp_if->variant & cpu_to_le16(0x07);
tmp += sizeof(struct bootrec_exp_if);
}
break;
case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
priv->version = *(u8 *)(entry->data + 1);
break;
case PDR_END:
/* make it overrun */
entry_len = len;
break;
}
entry = (void *)entry + (entry_len + 1)*2;
}
if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
err = -EINVAL;
goto err;
}
return 0;
err:
if (priv->iq_autocal) {
kfree(priv->iq_autocal);
priv->iq_autocal = NULL;
}
if (priv->output_limit) {
kfree(priv->output_limit);
priv->output_limit = NULL;
}
if (priv->curve_data) {
kfree(priv->curve_data);
priv->curve_data = NULL;
}
printk(KERN_ERR "p54: eeprom parse failed!\n");
return err;
}
EXPORT_SYMBOL_GPL(p54_parse_eeprom);
void p54_fill_eeprom_readback(struct p54_control_hdr *hdr)
{
struct p54_eeprom_lm86 *eeprom_hdr;
hdr->magic1 = cpu_to_le16(0x8000);
hdr->len = cpu_to_le16(sizeof(*eeprom_hdr) + 0x2000);
hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
hdr->retry1 = hdr->retry2 = 0;
eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
eeprom_hdr->offset = 0x0;
eeprom_hdr->len = cpu_to_le16(0x2000);
}
EXPORT_SYMBOL_GPL(p54_fill_eeprom_readback);
static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
struct ieee80211_rx_status rx_status = {0};
u16 freq = le16_to_cpu(hdr->freq);
rx_status.ssi = hdr->rssi;
rx_status.rate = hdr->rate & 0x1f; /* report short preambles & CCK too */
rx_status.channel = freq == 2484 ? 14 : (freq - 2407)/5;
rx_status.freq = freq;
rx_status.phymode = MODE_IEEE80211G;
rx_status.antenna = hdr->antenna;
rx_status.mactime = le64_to_cpu(hdr->timestamp);
rx_status.flag |= RX_FLAG_TSFT;
skb_pull(skb, sizeof(*hdr));
skb_trim(skb, le16_to_cpu(hdr->len));
ieee80211_rx_irqsafe(dev, skb, &rx_status);
}
static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
int i;
/* ieee80211_start_queues is great if all queues are really empty.
* But, what if some are full? */
for (i = 0; i < dev->queues; i++)
if (priv->tx_stats.data[i].len < priv->tx_stats.data[i].limit)
ieee80211_wake_queue(dev, i);
}
static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_common *priv = dev->priv;
struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
struct memrecord *range = NULL;
u32 freed = 0;
u32 last_addr = priv->rx_start;
while (entry != (struct sk_buff *)&priv->tx_queue) {
range = (struct memrecord *)&entry->cb;
if (range->start_addr == addr) {
struct ieee80211_tx_status status = {{0}};
struct p54_control_hdr *entry_hdr;
struct p54_tx_control_allocdata *entry_data;
int pad = 0;
if (entry->next != (struct sk_buff *)&priv->tx_queue)
freed = ((struct memrecord *)&entry->next->cb)->start_addr - last_addr;
else
freed = priv->rx_end - last_addr;
last_addr = range->end_addr;
__skb_unlink(entry, &priv->tx_queue);
if (!range->control) {
kfree_skb(entry);
break;
}
memcpy(&status.control, range->control,
sizeof(status.control));
kfree(range->control);
priv->tx_stats.data[status.control.queue].len--;
entry_hdr = (struct p54_control_hdr *) entry->data;
entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
pad = entry_data->align[0];
if (!(status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
if (!(payload->status & 0x01))
status.flags |= IEEE80211_TX_STATUS_ACK;
else
status.excessive_retries = 1;
}
status.retry_count = payload->retries - 1;
status.ack_signal = le16_to_cpu(payload->ack_rssi);
skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
ieee80211_tx_status_irqsafe(dev, entry, &status);
break;
} else
last_addr = range->end_addr;
entry = entry->next;
}
if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
sizeof(struct p54_control_hdr))
p54_wake_free_queues(dev);
}
static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
switch (le16_to_cpu(hdr->type)) {
case P54_CONTROL_TYPE_TXDONE:
p54_rx_frame_sent(dev, skb);
break;
case P54_CONTROL_TYPE_BBP:
break;
default:
printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
break;
}
}
/* returns zero if skb can be reused */
int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
switch (type) {
case 0x00:
case 0x01:
p54_rx_data(dev, skb);
return -1;
case 0x4d:
/* TODO: do something better... but then again, I've never seen this happen */
printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
wiphy_name(dev->wiphy));
break;
case 0x80:
p54_rx_control(dev, skb);
break;
default:
printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
wiphy_name(dev->wiphy), type);
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(p54_rx);
/*
* So, the firmware is somewhat stupid and doesn't know what places in its
* memory incoming data should go to. By poking around in the firmware, we
* can find some unused memory to upload our packets to. However, data that we
* want the card to TX needs to stay intact until the card has told us that
* it is done with it. This function finds empty places we can upload to and
* marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
* allocated areas.
*/
static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
struct p54_control_hdr *data, u32 len,
struct ieee80211_tx_control *control)
{
struct p54_common *priv = dev->priv;
struct sk_buff *entry = priv->tx_queue.next;
struct sk_buff *target_skb = NULL;
struct memrecord *range;
u32 last_addr = priv->rx_start;
u32 largest_hole = 0;
u32 target_addr = priv->rx_start;
unsigned long flags;
unsigned int left;
len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
spin_lock_irqsave(&priv->tx_queue.lock, flags);
left = skb_queue_len(&priv->tx_queue);
while (left--) {
u32 hole_size;
range = (struct memrecord *)&entry->cb;
hole_size = range->start_addr - last_addr;
if (!target_skb && hole_size >= len) {
target_skb = entry->prev;
hole_size -= len;
target_addr = last_addr;
}
largest_hole = max(largest_hole, hole_size);
last_addr = range->end_addr;
entry = entry->next;
}
if (!target_skb && priv->rx_end - last_addr >= len) {
target_skb = priv->tx_queue.prev;
largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
if (!skb_queue_empty(&priv->tx_queue)) {
range = (struct memrecord *)&target_skb->cb;
target_addr = range->end_addr;
}
} else
largest_hole = max(largest_hole, priv->rx_end - last_addr);
if (skb) {
range = (struct memrecord *)&skb->cb;
range->start_addr = target_addr;
range->end_addr = target_addr + len;
range->control = control;
__skb_queue_after(&priv->tx_queue, target_skb, skb);
if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
sizeof(struct p54_control_hdr))
ieee80211_stop_queues(dev);
}
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
data->req_id = cpu_to_le32(target_addr + 0x70);
}
static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
struct ieee80211_tx_control *control)
{
struct ieee80211_tx_queue_stats_data *current_queue;
struct p54_common *priv = dev->priv;
struct p54_control_hdr *hdr;
struct p54_tx_control_allocdata *txhdr;
struct ieee80211_tx_control *control_copy;
size_t padding, len;
u8 rate;
current_queue = &priv->tx_stats.data[control->queue];
if (unlikely(current_queue->len > current_queue->limit))
return NETDEV_TX_BUSY;
current_queue->len++;
current_queue->count++;
if (current_queue->len == current_queue->limit)
ieee80211_stop_queue(dev, control->queue);
padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
len = skb->len;
control_copy = kmalloc(sizeof(*control), GFP_ATOMIC);
if (control_copy)
memcpy(control_copy, control, sizeof(*control));
txhdr = (struct p54_tx_control_allocdata *)
skb_push(skb, sizeof(*txhdr) + padding);
hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
if (padding)
hdr->magic1 = cpu_to_le16(0x4010);
else
hdr->magic1 = cpu_to_le16(0x0010);
hdr->len = cpu_to_le16(len);
hdr->type = (control->flags & IEEE80211_TXCTL_NO_ACK) ? 0 : cpu_to_le16(1);
hdr->retry1 = hdr->retry2 = control->retry_limit;
p54_assign_address(dev, skb, hdr, skb->len, control_copy);
memset(txhdr->wep_key, 0x0, 16);
txhdr->padding = 0;
txhdr->padding2 = 0;
/* TODO: add support for alternate retry TX rates */
rate = control->tx_rate;
if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
rate |= 0x40;
else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
rate |= 0x20;
memset(txhdr->rateset, rate, 8);
txhdr->wep_key_present = 0;
txhdr->wep_key_len = 0;
txhdr->frame_type = cpu_to_le32(control->queue + 4);
txhdr->magic4 = 0;
txhdr->antenna = (control->antenna_sel_tx == 0) ?
2 : control->antenna_sel_tx - 1;
txhdr->output_power = 0x7f; // HW Maximum
txhdr->magic5 = (control->flags & IEEE80211_TXCTL_NO_ACK) ?
0 : ((rate > 0x3) ? cpu_to_le32(0x33) : cpu_to_le32(0x23));
if (padding)
txhdr->align[0] = padding;
priv->tx(dev, hdr, skb->len, 0);
return 0;
}
static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
const u8 *dst, const u8 *src, u8 antenna,
u32 magic3, u32 magic8, u32 magic9)
{
struct p54_common *priv = dev->priv;
struct p54_control_hdr *hdr;
struct p54_tx_control_filter *filter;
hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
priv->tx_hdr_len, GFP_ATOMIC);
if (!hdr)
return -ENOMEM;
hdr = (void *)hdr + priv->tx_hdr_len;
filter = (struct p54_tx_control_filter *) hdr->data;
hdr->magic1 = cpu_to_le16(0x8001);
hdr->len = cpu_to_le16(sizeof(*filter));
p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter), NULL);
hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
filter->filter_type = cpu_to_le16(filter_type);
memcpy(filter->dst, dst, ETH_ALEN);
if (!src)
memset(filter->src, ~0, ETH_ALEN);
else
memcpy(filter->src, src, ETH_ALEN);
filter->antenna = antenna;
filter->magic3 = cpu_to_le32(magic3);
filter->rx_addr = cpu_to_le32(priv->rx_end);
filter->max_rx = cpu_to_le16(0x0620); /* FIXME: for usb ver 1.. maybe */
filter->rxhw = priv->rxhw;
filter->magic8 = cpu_to_le16(magic8);
filter->magic9 = cpu_to_le16(magic9);
priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
return 0;
}
static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
{
struct p54_common *priv = dev->priv;
struct p54_control_hdr *hdr;
struct p54_tx_control_channel *chan;
unsigned int i;
size_t payload_len = sizeof(*chan) + sizeof(u32)*2 +
sizeof(*chan->curve_data) *
priv->curve_data->points_per_channel;
void *entry;
hdr = kzalloc(sizeof(*hdr) + payload_len +
priv->tx_hdr_len, GFP_KERNEL);
if (!hdr)
return -ENOMEM;
hdr = (void *)hdr + priv->tx_hdr_len;
chan = (struct p54_tx_control_channel *) hdr->data;
hdr->magic1 = cpu_to_le16(0x8001);
hdr->len = cpu_to_le16(sizeof(*chan));
hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + payload_len, NULL);
chan->magic1 = cpu_to_le16(0x1);
chan->magic2 = cpu_to_le16(0x0);
for (i = 0; i < priv->iq_autocal_len; i++) {
if (priv->iq_autocal[i].freq != freq)
continue;
memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
sizeof(*priv->iq_autocal));
break;
}
if (i == priv->iq_autocal_len)
goto err;
for (i = 0; i < priv->output_limit_len; i++) {
if (priv->output_limit[i].freq != freq)
continue;
chan->val_barker = 0x38;
chan->val_bpsk = priv->output_limit[i].val_bpsk;
chan->val_qpsk = priv->output_limit[i].val_qpsk;
chan->val_16qam = priv->output_limit[i].val_16qam;
chan->val_64qam = priv->output_limit[i].val_64qam;
break;
}
if (i == priv->output_limit_len)
goto err;
chan->pa_points_per_curve = priv->curve_data->points_per_channel;
entry = priv->curve_data->data;
for (i = 0; i < priv->curve_data->channels; i++) {
if (*((__le16 *)entry) != freq) {
entry += sizeof(__le16);
entry += sizeof(struct pda_pa_curve_data_sample_rev1) *
chan->pa_points_per_curve;
continue;
}
entry += sizeof(__le16);
memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
chan->pa_points_per_curve);
break;
}
memcpy(hdr->data + payload_len - 4, &chan->val_bpsk, 4);
priv->tx(dev, hdr, sizeof(*hdr) + payload_len, 1);
return 0;
err:
printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
kfree(hdr);
return -EINVAL;
}
static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
{
struct p54_common *priv = dev->priv;
struct p54_control_hdr *hdr;
struct p54_tx_control_led *led;
hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
priv->tx_hdr_len, GFP_KERNEL);
if (!hdr)
return -ENOMEM;
hdr = (void *)hdr + priv->tx_hdr_len;
hdr->magic1 = cpu_to_le16(0x8001);
hdr->len = cpu_to_le16(sizeof(*led));
hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led), NULL);
led = (struct p54_tx_control_led *) hdr->data;
led->mode = cpu_to_le16(mode);
led->led_permanent = cpu_to_le16(link);
led->led_temporary = cpu_to_le16(act);
led->duration = cpu_to_le16(1000);
priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
return 0;
}
#define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, burst) \
do { \
queue.aifs = cpu_to_le16(ai_fs); \
queue.cwmin = cpu_to_le16(cw_min); \
queue.cwmax = cpu_to_le16(cw_max); \
queue.txop = (burst == 0) ? \
0 : cpu_to_le16((burst * 100) / 32 + 1); \
} while(0)
static void p54_init_vdcf(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
struct p54_control_hdr *hdr;
struct p54_tx_control_vdcf *vdcf;
/* all USB V1 adapters need a extra headroom */
hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
hdr->magic1 = cpu_to_le16(0x8001);
hdr->len = cpu_to_le16(sizeof(*vdcf));
hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
hdr->req_id = cpu_to_le32(priv->rx_start);
vdcf = (struct p54_tx_control_vdcf *) hdr->data;
P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 0x000f);
P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 0x001e);
P54_SET_QUEUE(vdcf->queue[2], 0x0002, 0x000f, 0x03ff, 0x0014);
P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0x0000);
}
static void p54_set_vdcf(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
struct p54_control_hdr *hdr;
struct p54_tx_control_vdcf *vdcf;
hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf), NULL);
vdcf = (struct p54_tx_control_vdcf *) hdr->data;
if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
vdcf->slottime = 9;
vdcf->magic1 = 0x00;
vdcf->magic2 = 0x10;
} else {
vdcf->slottime = 20;
vdcf->magic1 = 0x0a;
vdcf->magic2 = 0x06;
}
/* (see prism54/isl_oid.h for further details) */
vdcf->frameburst = cpu_to_le16(0);
priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
}
static int p54_start(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
int err;
err = priv->open(dev);
if (!err)
priv->mode = IEEE80211_IF_TYPE_MNTR;
return err;
}
static void p54_stop(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
while ((skb = skb_dequeue(&priv->tx_queue))) {
struct memrecord *range = (struct memrecord *)&skb->cb;
if (range->control)
kfree(range->control);
kfree_skb(skb);
}
priv->stop(dev);
priv->mode = IEEE80211_IF_TYPE_INVALID;
}
static int p54_add_interface(struct ieee80211_hw *dev,
struct ieee80211_if_init_conf *conf)
{
struct p54_common *priv = dev->priv;
if (priv->mode != IEEE80211_IF_TYPE_MNTR)
return -EOPNOTSUPP;
switch (conf->type) {
case IEEE80211_IF_TYPE_STA:
priv->mode = conf->type;
break;
default:
return -EOPNOTSUPP;
}
memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
switch (conf->type) {
case IEEE80211_IF_TYPE_STA:
p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
break;
default:
BUG(); /* impossible */
break;
}
p54_set_leds(dev, 1, 0, 0);
return 0;
}
static void p54_remove_interface(struct ieee80211_hw *dev,
struct ieee80211_if_init_conf *conf)
{
struct p54_common *priv = dev->priv;
priv->mode = IEEE80211_IF_TYPE_MNTR;
memset(priv->mac_addr, 0, ETH_ALEN);
p54_set_filter(dev, 0, priv->mac_addr, NULL, 2, 0, 0, 0);
}
static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
{
int ret;
ret = p54_set_freq(dev, cpu_to_le16(conf->freq));
p54_set_vdcf(dev);
return ret;
}
static int p54_config_interface(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
struct ieee80211_if_conf *conf)
{
struct p54_common *priv = dev->priv;
p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
memcpy(priv->bssid, conf->bssid, ETH_ALEN);
return 0;
}
static void p54_configure_filter(struct ieee80211_hw *dev,
unsigned int changed_flags,
unsigned int *total_flags,
int mc_count, struct dev_mc_list *mclist)
{
struct p54_common *priv = dev->priv;
*total_flags &= FIF_BCN_PRBRESP_PROMISC;
if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
p54_set_filter(dev, 0, priv->mac_addr,
NULL, 2, 0, 0, 0);
else
p54_set_filter(dev, 0, priv->mac_addr,
priv->bssid, 2, 0, 0, 0);
}
}
static int p54_conf_tx(struct ieee80211_hw *dev, int queue,
const struct ieee80211_tx_queue_params *params)
{
struct p54_common *priv = dev->priv;
struct p54_tx_control_vdcf *vdcf;
vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
if ((params) && !((queue < 0) || (queue > 4))) {
P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
params->cw_min, params->cw_max, params->burst_time);
} else
return -EINVAL;
p54_set_vdcf(dev);
return 0;
}
static int p54_get_stats(struct ieee80211_hw *dev,
struct ieee80211_low_level_stats *stats)
{
/* TODO */
return 0;
}
static int p54_get_tx_stats(struct ieee80211_hw *dev,
struct ieee80211_tx_queue_stats *stats)
{
struct p54_common *priv = dev->priv;
unsigned int i;
for (i = 0; i < dev->queues; i++)
memcpy(&stats->data[i], &priv->tx_stats.data[i],
sizeof(stats->data[i]));
return 0;
}
static const struct ieee80211_ops p54_ops = {
.tx = p54_tx,
.start = p54_start,
.stop = p54_stop,
.add_interface = p54_add_interface,
.remove_interface = p54_remove_interface,
.config = p54_config,
.config_interface = p54_config_interface,
.configure_filter = p54_configure_filter,
.conf_tx = p54_conf_tx,
.get_stats = p54_get_stats,
.get_tx_stats = p54_get_tx_stats
};
struct ieee80211_hw *p54_init_common(size_t priv_data_len)
{
struct ieee80211_hw *dev;
struct p54_common *priv;
int i;
dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
if (!dev)
return NULL;
priv = dev->priv;
priv->mode = IEEE80211_IF_TYPE_INVALID;
skb_queue_head_init(&priv->tx_queue);
memcpy(priv->channels, p54_channels, sizeof(p54_channels));
memcpy(priv->rates, p54_rates, sizeof(p54_rates));
priv->modes[1].mode = MODE_IEEE80211B;
priv->modes[1].num_rates = 4;
priv->modes[1].rates = priv->rates;
priv->modes[1].num_channels = ARRAY_SIZE(p54_channels);
priv->modes[1].channels = priv->channels;
priv->modes[0].mode = MODE_IEEE80211G;
priv->modes[0].num_rates = ARRAY_SIZE(p54_rates);
priv->modes[0].rates = priv->rates;
priv->modes[0].num_channels = ARRAY_SIZE(p54_channels);
priv->modes[0].channels = priv->channels;
dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
IEEE80211_HW_RX_INCLUDES_FCS;
dev->channel_change_time = 1000; /* TODO: find actual value */
dev->max_rssi = 127;
priv->tx_stats.data[0].limit = 5;
dev->queues = 1;
dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
sizeof(struct p54_tx_control_allocdata);
priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf) +
priv->tx_hdr_len + sizeof(struct p54_control_hdr), GFP_KERNEL);
if (!priv->cached_vdcf) {
ieee80211_free_hw(dev);
return NULL;
}
p54_init_vdcf(dev);
for (i = 0; i < 2; i++) {
if (ieee80211_register_hwmode(dev, &priv->modes[i])) {
kfree(priv->cached_vdcf);
ieee80211_free_hw(dev);
return NULL;
}
}
return dev;
}
EXPORT_SYMBOL_GPL(p54_init_common);
void p54_free_common(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
kfree(priv->iq_autocal);
kfree(priv->output_limit);
kfree(priv->curve_data);
kfree(priv->cached_vdcf);
}
EXPORT_SYMBOL_GPL(p54_free_common);
static int __init p54_init(void)
{
return 0;
}
static void __exit p54_exit(void)
{
}
module_init(p54_init);
module_exit(p54_exit);
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