/* Returns 1 if the data packet is for us and 0 otherwise. */
static int is_data_packet_for_us(struct ieee80211_device *ieee,
struct ieee80211_hdr_4addr *hdr)
{
struct net_device *netdev = ieee->dev;
u16 fc = le16_to_cpu(hdr->frame_ctl);
ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
switch (ieee->iw_mode) {
case IW_MODE_ADHOC:
if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) != 0)
return 0;
break;
case IW_MODE_AUTO:
case IW_MODE_INFRA:
if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
IEEE80211_FCTL_FROMDS ||
memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) != 0)
return 0;
break;
default:
ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
return 0;
}
return memcmp(hdr->addr1, netdev->dev_addr, ETH_ALEN) == 0 ||
(is_multicast_ether_addr(hdr->addr1) &&
memcmp(hdr->addr3, netdev->dev_addr, ETH_ALEN) != 0) ||
(netdev->flags & IFF_PROMISC);
}
static void rx_urb_complete(struct urb *urb)
{
struct zd_usb *usb;
struct zd_usb_rx *rx;
const u8 *buffer;
unsigned int length;
switch (urb->status) {
case 0:
break;
case -ESHUTDOWN:
case -EINVAL:
case -ENODEV:
case -ENOENT:
case -ECONNRESET:
case -EPIPE:
return;
default:
dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
goto resubmit;
}
buffer = urb->transfer_buffer;
length = urb->actual_length;
usb = urb->context;
rx = &usb->rx;
if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
/* If there is an old first fragment, we don't care. */
dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
spin_lock(&rx->lock);
memcpy(rx->fragment, buffer, length);
rx->fragment_length = length;
spin_unlock(&rx->lock);
goto resubmit;
}
spin_lock(&rx->lock);
if (rx->fragment_length > 0) {
/* We are on a second fragment, we believe */
ZD_ASSERT(length + rx->fragment_length <=
ARRAY_SIZE(rx->fragment));
dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
memcpy(rx->fragment+rx->fragment_length, buffer, length);
handle_rx_packet(usb, rx->fragment,
rx->fragment_length + length);
rx->fragment_length = 0;
spin_unlock(&rx->lock);
} else {
spin_unlock(&rx->lock);
handle_rx_packet(usb, buffer, length);
}
resubmit:
usb_submit_urb(urb, GFP_ATOMIC);
}
static int fill_ctrlset(struct zd_mac *mac,
struct sk_buff *skb,
struct ieee80211_tx_control *control)
{
int r;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
unsigned int frag_len = skb->len + FCS_LEN;
unsigned int packet_length;
struct zd_ctrlset *cs = (struct zd_ctrlset *)
skb_push(skb, sizeof(struct zd_ctrlset));
ZD_ASSERT(frag_len <= 0xffff);
cs->modulation = control->tx_rate->hw_value;
if (control->flags & IEEE80211_TXCTL_SHORT_PREAMBLE)
cs->modulation = control->tx_rate->hw_value_short;
cs->tx_length = cpu_to_le16(frag_len);
cs_set_control(mac, cs, hdr, control->flags);
packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
ZD_ASSERT(packet_length <= 0xffff);
/* ZD1211B: Computing the length difference this way, gives us
* flexibility to compute the packet length.
*/
cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ?
packet_length - frag_len : packet_length);
/*
* CURRENT LENGTH:
* - transmit frame length in microseconds
* - seems to be derived from frame length
* - see Cal_Us_Service() in zdinlinef.h
* - if macp->bTxBurstEnable is enabled, then multiply by 4
* - bTxBurstEnable is never set in the vendor driver
*
* SERVICE:
* - "for PLCP configuration"
* - always 0 except in some situations at 802.11b 11M
* - see line 53 of zdinlinef.h
*/
cs->service = 0;
r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation),
le16_to_cpu(cs->tx_length));
if (r < 0)
return r;
cs->current_length = cpu_to_le16(r);
cs->next_frame_length = 0;
return 0;
}
int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
{
int r;
u8 channel;
ZD_ASSERT(!irqs_disabled());
spin_lock_irq(&mac->lock);
if (regdomain == 0) {
regdomain = mac->default_regdomain;
}
if (!zd_regdomain_supported(regdomain)) {
spin_unlock_irq(&mac->lock);
return -EINVAL;
}
mac->regdomain = regdomain;
channel = mac->requested_channel;
spin_unlock_irq(&mac->lock);
r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
if (r)
return r;
if (!zd_regdomain_supports_channel(regdomain, channel)) {
r = reset_channel(mac);
if (r)
return r;
}
return 0;
}
void zd_mac_clear(struct zd_mac *mac)
{
flush_workqueue(zd_workqueue);
zd_chip_clear(&mac->chip);
ZD_ASSERT(!spin_is_locked(&mac->lock));
ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
}
static inline void handle_regs_int(struct urb *urb)
{
struct zd_usb *usb = urb->context;
struct zd_usb_interrupt *intr = &usb->intr;
int len;
u16 int_num;
ZD_ASSERT(in_interrupt());
spin_lock(&intr->lock);
int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
if (int_num == CR_INTERRUPT) {
struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
spin_lock(&mac->lock);
memcpy(&mac->intr_buffer, urb->transfer_buffer,
USB_MAX_EP_INT_BUFFER);
spin_unlock(&mac->lock);
schedule_work(&mac->process_intr);
} else if (intr->read_regs_enabled) {
intr->read_regs.length = len = urb->actual_length;
if (len > sizeof(intr->read_regs.buffer))
len = sizeof(intr->read_regs.buffer);
memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
intr->read_regs_enabled = 0;
complete(&intr->read_regs.completion);
goto out;
}
out:
spin_unlock(&intr->lock);
}
static int read_e2p_mac_addr(struct zd_chip *chip)
{
static const zd_addr_t addr[2] = { E2P_MAC_ADDR_P1, E2P_MAC_ADDR_P2 };
ZD_ASSERT(mutex_is_locked(&chip->mutex));
return _read_mac_addr(chip, chip->e2p_mac, (const zd_addr_t *)addr);
}
int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
{
struct ieee80211_device *ieee;
switch (mode) {
case IW_MODE_AUTO:
case IW_MODE_ADHOC:
case IW_MODE_INFRA:
mac->netdev->type = ARPHRD_ETHER;
break;
case IW_MODE_MONITOR:
mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
break;
default:
dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
return -EINVAL;
}
ieee = zd_mac_to_ieee80211(mac);
ZD_ASSERT(!irqs_disabled());
spin_lock_irq(&ieee->lock);
ieee->iw_mode = mode;
spin_unlock_irq(&ieee->lock);
if (netif_running(mac->netdev))
return reset_mode(mac);
return 0;
}
int zd_iowrite16a_locked(struct zd_chip *chip,
const struct zd_ioreq16 *ioreqs, unsigned int count)
{
int r;
unsigned int i, j, t, max;
ZD_ASSERT(mutex_is_locked(&chip->mutex));
for (i = 0; i < count; i += j + t) {
t = 0;
max = count-i;
if (max > USB_MAX_IOWRITE16_COUNT)
max = USB_MAX_IOWRITE16_COUNT;
for (j = 0; j < max; j++) {
if (!ioreqs[i+j].addr) {
t = 1;
break;
}
}
r = zd_usb_iowrite16v(&chip->usb, &ioreqs[i], j);
if (r) {
dev_dbg_f(zd_chip_dev(chip),
"error zd_usb_iowrite16v. Error number %d\n",
r);
return r;
}
}
return 0;
}
void zd_chip_clear(struct zd_chip *chip)
{
ZD_ASSERT(!mutex_is_locked(&chip->mutex));
zd_usb_clear(&chip->usb);
zd_rf_clear(&chip->rf);
mutex_destroy(&chip->mutex);
ZD_MEMCLEAR(chip, sizeof(*chip));
}
int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
{
int i;
const struct channel_range *channel_range;
u8 regdomain;
memset(range, 0, sizeof(*range));
/* FIXME: Not so important and depends on the mode. For 802.11g
* usually this value is used. It seems to be that Bit/s number is
* given here.
*/
range->throughput = 27 * 1000 * 1000;
range->max_qual.qual = 100;
range->max_qual.level = 100;
/* FIXME: Needs still to be tuned. */
range->avg_qual.qual = 71;
range->avg_qual.level = 80;
/* FIXME: depends on standard? */
range->min_rts = 256;
range->max_rts = 2346;
range->min_frag = MIN_FRAG_THRESHOLD;
range->max_frag = MAX_FRAG_THRESHOLD;
range->max_encoding_tokens = WEP_KEYS;
range->num_encoding_sizes = 2;
range->encoding_size[0] = 5;
range->encoding_size[1] = WEP_KEY_LEN;
range->we_version_compiled = WIRELESS_EXT;
range->we_version_source = 20;
range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
ZD_ASSERT(!irqs_disabled());
spin_lock_irq(&mac->lock);
regdomain = mac->regdomain;
spin_unlock_irq(&mac->lock);
channel_range = zd_channel_range(regdomain);
range->num_channels = channel_range->end - channel_range->start;
range->old_num_channels = range->num_channels;
range->num_frequency = range->num_channels;
range->old_num_frequency = range->num_frequency;
for (i = 0; i < range->num_frequency; i++) {
struct iw_freq *freq = &range->freq[i];
freq->i = channel_range->start + i;
zd_channel_to_freq(freq, freq->i);
}
return 0;
}
void zd_mac_clear(struct zd_mac *mac)
{
flush_workqueue(zd_workqueue);
skb_queue_purge(&mac->rx_queue);
tasklet_kill(&mac->rx_tasklet);
zd_chip_clear(&mac->chip);
ZD_ASSERT(!spin_is_locked(&mac->lock));
ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
}
int zd_mac_init_hw(struct zd_mac *mac, u8 device_type)
{
int r;
struct zd_chip *chip = &mac->chip;
u8 addr[ETH_ALEN];
u8 default_regdomain;
r = zd_chip_enable_int(chip);
if (r)
goto out;
r = zd_chip_init_hw(chip, device_type);
if (r)
goto disable_int;
zd_get_e2p_mac_addr(chip, addr);
r = zd_write_mac_addr(chip, addr);
if (r)
goto disable_int;
ZD_ASSERT(!irqs_disabled());
spin_lock_irq(&mac->lock);
memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
spin_unlock_irq(&mac->lock);
r = zd_read_regdomain(chip, &default_regdomain);
if (r)
goto disable_int;
if (!zd_regdomain_supported(default_regdomain)) {
dev_dbg_f(zd_mac_dev(mac),
"Regulatory Domain %#04x is not supported.\n",
default_regdomain);
r = -EINVAL;
goto disable_int;
}
spin_lock_irq(&mac->lock);
mac->regdomain = mac->default_regdomain = default_regdomain;
spin_unlock_irq(&mac->lock);
r = reset_channel(mac);
if (r)
goto disable_int;
/* We must inform the device that we are doing encryption/decryption in
* software at the moment. */
r = zd_set_encryption_type(chip, ENC_SNIFFER);
if (r)
goto disable_int;
r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
if (r)
goto disable_int;
r = 0;
disable_int:
zd_chip_disable_int(chip);
out:
return r;
}
static inline void init_usb_rx(struct zd_usb *usb)
{
struct zd_usb_rx *rx = &usb->rx;
spin_lock_init(&rx->lock);
if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
rx->usb_packet_size = 512;
} else {
rx->usb_packet_size = 64;
}
ZD_ASSERT(rx->fragment_length == 0);
}
static int __zd_usb_enable_rx(struct zd_usb *usb)
{
int i, r;
struct zd_usb_rx *rx = &usb->rx;
struct urb **urbs;
dev_dbg_f(zd_usb_dev(usb), "\n");
r = -ENOMEM;
urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
if (!urbs)
goto error;
for (i = 0; i < RX_URBS_COUNT; i++) {
urbs[i] = alloc_rx_urb(usb);
if (!urbs[i])
goto error;
}
ZD_ASSERT(!irqs_disabled());
spin_lock_irq(&rx->lock);
if (rx->urbs) {
spin_unlock_irq(&rx->lock);
r = 0;
goto error;
}
rx->urbs = urbs;
rx->urbs_count = RX_URBS_COUNT;
spin_unlock_irq(&rx->lock);
for (i = 0; i < RX_URBS_COUNT; i++) {
r = usb_submit_urb(urbs[i], GFP_KERNEL);
if (r)
goto error_submit;
}
return 0;
error_submit:
for (i = 0; i < RX_URBS_COUNT; i++) {
usb_kill_urb(urbs[i]);
}
spin_lock_irq(&rx->lock);
rx->urbs = NULL;
rx->urbs_count = 0;
spin_unlock_irq(&rx->lock);
error:
if (urbs) {
for (i = 0; i < RX_URBS_COUNT; i++)
free_rx_urb(urbs[i]);
}
return r;
}
/**
* tx_status - reports tx status of a packet if required
* @hw - a &struct ieee80211_hw pointer
* @skb - a sk-buffer
* @status - the tx status of the packet without control information
* @success - True for successfull transmission of the frame
*
* This information calls ieee80211_tx_status_irqsafe() if required by the
* control information. It copies the control information into the status
* information.
*
* If no status information has been requested, the skb is freed.
*/
static void tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_tx_status *status,
bool success)
{
struct zd_tx_skb_control_block *cb = (struct zd_tx_skb_control_block *)
skb->cb;
ZD_ASSERT(cb->control != NULL);
memcpy(&status->control, cb->control, sizeof(status->control));
if (!success)
status->excessive_retries = 1;
clear_tx_skb_control_block(skb);
ieee80211_tx_status_irqsafe(hw, skb, status);
}
int zd_switch_radio_on(struct zd_rf *rf)
{
int r, t;
struct zd_chip *chip = zd_rf_to_chip(rf);
ZD_ASSERT(mutex_is_locked(&chip->mutex));
r = zd_chip_lock_phy_regs(chip);
if (r)
return r;
t = rf->switch_radio_on(rf);
r = zd_chip_unlock_phy_regs(chip);
if (t)
r = t;
return r;
}
int zd_rf_set_channel(struct zd_rf *rf, u8 channel)
{
int r;
ZD_ASSERT(mutex_is_locked(&zd_rf_to_chip(rf)->mutex));
if (channel < MIN_CHANNEL24)
return -EINVAL;
if (channel > MAX_CHANNEL24)
return -EINVAL;
dev_dbg_f(zd_chip_dev(zd_rf_to_chip(rf)), "channel: %d\n", channel);
r = rf->set_channel(rf, channel);
if (r >= 0)
rf->channel = channel;
return r;
}
int zd_switch_radio_off(struct zd_rf *rf)
{
int r, t;
struct zd_chip *chip = zd_rf_to_chip(rf);
/* TODO: move phy regs handling to zd_chip */
ZD_ASSERT(mutex_is_locked(&chip->mutex));
r = zd_chip_lock_phy_regs(chip);
if (r)
return r;
t = rf->switch_radio_off(rf);
r = zd_chip_unlock_phy_regs(chip);
if (t)
r = t;
return r;
}
/**
* init_tx_skb_control_block - initializes skb control block
* @skb: a &sk_buff pointer
* @dev: pointer to the mac80221 device
* @control: mac80211 tx control applying for the frame in @skb
*
* Initializes the control block of the skbuff to be transmitted.
*/
static int init_tx_skb_control_block(struct sk_buff *skb,
struct ieee80211_hw *hw,
struct ieee80211_tx_control *control)
{
struct zd_tx_skb_control_block *cb =
(struct zd_tx_skb_control_block *)skb->cb;
ZD_ASSERT(sizeof(*cb) <= sizeof(skb->cb));
memset(cb, 0, sizeof(*cb));
cb->hw= hw;
cb->control = kmalloc(sizeof(*control), GFP_ATOMIC);
if (cb->control == NULL)
return -ENOMEM;
memcpy(cb->control, control, sizeof(*control));
return 0;
}
static int read_pod(struct zd_chip *chip, u8 *rf_type)
{
int r;
u32 value;
ZD_ASSERT(mutex_is_locked(&chip->mutex));
r = zd_ioread32_locked(chip, &value, E2P_POD);
if (r)
goto error;
dev_dbg_f(zd_chip_dev(chip), "E2P_POD %#010x\n", value);
/* FIXME: AL2230 handling (Bit 7 in POD) */
*rf_type = value & 0x0f;
chip->pa_type = (value >> 16) & 0x0f;
chip->patch_cck_gain = (value >> 8) & 0x1;
chip->patch_cr157 = (value >> 13) & 0x1;
chip->patch_6m_band_edge = (value >> 21) & 0x1;
chip->new_phy_layout = (value >> 31) & 0x1;
chip->al2230s_bit = (value >> 7) & 0x1;
chip->link_led = ((value >> 4) & 1) ? LED1 : LED2;
chip->supports_tx_led = 1;
if (value & (1 << 24)) { /* LED scenario */
if (value & (1 << 29))
chip->supports_tx_led = 0;
}
dev_dbg_f(zd_chip_dev(chip),
"RF %s %#01x PA type %#01x patch CCK %d patch CR157 %d "
"patch 6M %d new PHY %d link LED%d tx led %d\n",
zd_rf_name(*rf_type), *rf_type,
chip->pa_type, chip->patch_cck_gain,
chip->patch_cr157, chip->patch_6m_band_edge,
chip->new_phy_layout,
chip->link_led == LED1 ? 1 : 2,
chip->supports_tx_led);
return 0;
error:
*rf_type = 0;
chip->pa_type = 0;
chip->patch_cck_gain = 0;
chip->patch_cr157 = 0;
chip->patch_6m_band_edge = 0;
chip->new_phy_layout = 0;
return r;
}
int _zd_iowrite32v_locked(struct zd_chip *chip, const struct zd_ioreq32 *ioreqs,
unsigned int count)
{
int i, j, r;
struct zd_ioreq16 *ioreqs16;
unsigned int count16;
ZD_ASSERT(mutex_is_locked(&chip->mutex));
if (count == 0)
return 0;
if (count > USB_MAX_IOWRITE32_COUNT)
return -EINVAL;
/* Allocate a single memory block for values and addresses. */
count16 = 2*count;
ioreqs16 = kmalloc(count16 * sizeof(struct zd_ioreq16), GFP_KERNEL);
if (!ioreqs16) {
r = -ENOMEM;
dev_dbg_f(zd_chip_dev(chip),
"error %d in ioreqs16 allocation\n", r);
goto out;
}
for (i = 0; i < count; i++) {
j = 2*i;
/* We write the high word always first. */
ioreqs16[j].value = ioreqs[i].value >> 16;
ioreqs16[j].addr = inc_addr(ioreqs[i].addr);
ioreqs16[j+1].value = ioreqs[i].value;
ioreqs16[j+1].addr = ioreqs[i].addr;
}
r = zd_usb_iowrite16v(&chip->usb, ioreqs16, count16);
#ifdef DEBUG
if (r) {
dev_dbg_f(zd_chip_dev(chip),
"error %d in zd_usb_write16v\n", r);
}
#endif /* DEBUG */
out:
kfree(ioreqs16);
return r;
}
int zd_rf_init_hw(struct zd_rf *rf, u8 type)
{
int r = 0;
int t;
struct zd_chip *chip = zd_rf_to_chip(rf);
ZD_ASSERT(mutex_is_locked(&chip->mutex));
switch (type) {
case RF2959_RF:
r = zd_rf_init_rf2959(rf);
break;
case AL2230_RF:
case AL2230S_RF:
r = zd_rf_init_al2230(rf);
break;
case AL7230B_RF:
r = zd_rf_init_al7230b(rf);
break;
case MAXIM_NEW_RF:
case UW2453_RF:
r = zd_rf_init_uw2453(rf);
break;
default:
dev_err(zd_chip_dev(chip),
"RF %s %#x is not supported\n", zd_rf_name(type), type);
rf->type = 0;
return -ENODEV;
}
if (r)
return r;
rf->type = type;
r = zd_chip_lock_phy_regs(chip);
if (r)
return r;
t = rf->init_hw(rf);
r = zd_chip_unlock_phy_regs(chip);
if (t)
r = t;
return r;
}
/* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
static u8 zd_rate_typed(u8 zd_rate)
{
static const u8 typed_rates[16] = {
[ZD_CCK_RATE_1M] = ZD_CS_CCK|ZD_CCK_RATE_1M,
[ZD_CCK_RATE_2M] = ZD_CS_CCK|ZD_CCK_RATE_2M,
[ZD_CCK_RATE_5_5M] = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
[ZD_CCK_RATE_11M] = ZD_CS_CCK|ZD_CCK_RATE_11M,
[ZD_OFDM_RATE_6M] = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
[ZD_OFDM_RATE_9M] = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
[ZD_OFDM_RATE_12M] = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
[ZD_OFDM_RATE_18M] = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
[ZD_OFDM_RATE_24M] = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
[ZD_OFDM_RATE_36M] = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
[ZD_OFDM_RATE_48M] = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
[ZD_OFDM_RATE_54M] = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
};
ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
return typed_rates[zd_rate & ZD_CS_RATE_MASK];
}
static int _zd_iowrite32v_async_locked(struct zd_chip *chip,
const struct zd_ioreq32 *ioreqs,
unsigned int count)
{
int i, j, r;
struct zd_ioreq16 ioreqs16[USB_MAX_IOWRITE32_COUNT * 2];
unsigned int count16;
/* Use stack for values and addresses. */
ZD_ASSERT(mutex_is_locked(&chip->mutex));
if (count == 0)
return 0;
if (count > USB_MAX_IOWRITE32_COUNT)
return -EINVAL;
count16 = 2 * count;
BUG_ON(count16 * sizeof(struct zd_ioreq16) > sizeof(ioreqs16));
for (i = 0; i < count; i++) {
j = 2*i;
/* We write the high word always first. */
ioreqs16[j].value = ioreqs[i].value >> 16;
ioreqs16[j].addr = inc_addr(ioreqs[i].addr);
ioreqs16[j+1].value = ioreqs[i].value;
ioreqs16[j+1].addr = ioreqs[i].addr;
}
r = zd_usb_iowrite16v_async(&chip->usb, ioreqs16, count16);
#ifdef DEBUG
if (r) {
dev_dbg_f(zd_chip_dev(chip),
"error %d in zd_usb_write16v\n", r);
}
#endif /* DEBUG */
return r;
}
int zd_mac_init_hw(struct ieee80211_hw *hw)
{
int r;
struct zd_mac *mac = zd_hw_mac(hw);
struct zd_chip *chip = &mac->chip;
u8 default_regdomain;
r = zd_chip_enable_int(chip);
if (r)
goto out;
r = zd_chip_init_hw(chip);
if (r)
goto disable_int;
ZD_ASSERT(!irqs_disabled());
r = zd_read_regdomain(chip, &default_regdomain);
if (r)
goto disable_int;
spin_lock_irq(&mac->lock);
mac->regdomain = mac->default_regdomain = default_regdomain;
spin_unlock_irq(&mac->lock);
/* We must inform the device that we are doing encryption/decryption in
* software at the moment. */
r = zd_set_encryption_type(chip, ENC_SNIFFER);
if (r)
goto disable_int;
zd_geo_init(hw, mac->regdomain);
r = 0;
disable_int:
zd_chip_disable_int(chip);
out:
return r;
}
static inline void handle_regs_int(struct urb *urb)
{
struct zd_usb *usb = urb->context;
struct zd_usb_interrupt *intr = &usb->intr;
int len;
ZD_ASSERT(in_interrupt());
spin_lock(&intr->lock);
if (intr->read_regs_enabled) {
intr->read_regs.length = len = urb->actual_length;
if (len > sizeof(intr->read_regs.buffer))
len = sizeof(intr->read_regs.buffer);
memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
intr->read_regs_enabled = 0;
complete(&intr->read_regs.completion);
goto out;
}
dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
out:
spin_unlock(&intr->lock);
}
int zd_usb_enable_int(struct zd_usb *usb)
{
int r;
struct usb_device *udev;
struct zd_usb_interrupt *intr = &usb->intr;
void *transfer_buffer = NULL;
struct urb *urb;
dev_dbg_f(zd_usb_dev(usb), "\n");
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
r = -ENOMEM;
goto out;
}
ZD_ASSERT(!irqs_disabled());
spin_lock_irq(&intr->lock);
if (intr->urb) {
spin_unlock_irq(&intr->lock);
r = 0;
goto error_free_urb;
}
intr->urb = urb;
spin_unlock_irq(&intr->lock);
/* TODO: make it a DMA buffer */
r = -ENOMEM;
transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL);
if (!transfer_buffer) {
dev_dbg_f(zd_usb_dev(usb),
"couldn't allocate transfer_buffer\n");
goto error_set_urb_null;
}
udev = zd_usb_to_usbdev(usb);
usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
transfer_buffer, USB_MAX_EP_INT_BUFFER,
int_urb_complete, usb,
intr->interval);
dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
r = usb_submit_urb(urb, GFP_KERNEL);
if (r) {
dev_dbg_f(zd_usb_dev(usb),
"Couldn't submit urb. Error number %d\n", r);
goto error;
}
return 0;
error:
kfree(transfer_buffer);
error_set_urb_null:
spin_lock_irq(&intr->lock);
intr->urb = NULL;
spin_unlock_irq(&intr->lock);
error_free_urb:
usb_free_urb(urb);
out:
return r;
}
static int fill_ctrlset(struct zd_mac *mac,
struct ieee80211_txb *txb,
int frag_num)
{
int r;
struct sk_buff *skb = txb->fragments[frag_num];
struct ieee80211_hdr_4addr *hdr =
(struct ieee80211_hdr_4addr *) skb->data;
unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
unsigned int next_frag_len;
unsigned int packet_length;
struct zd_ctrlset *cs = (struct zd_ctrlset *)
skb_push(skb, sizeof(struct zd_ctrlset));
if (frag_num+1 < txb->nr_frags) {
next_frag_len = txb->fragments[frag_num+1]->len +
IEEE80211_FCS_LEN;
} else {
next_frag_len = 0;
}
ZD_ASSERT(frag_len <= 0xffff);
ZD_ASSERT(next_frag_len <= 0xffff);
cs_set_modulation(mac, cs, hdr);
cs->tx_length = cpu_to_le16(frag_len);
cs_set_control(mac, cs, hdr);
packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
ZD_ASSERT(packet_length <= 0xffff);
/* ZD1211B: Computing the length difference this way, gives us
* flexibility to compute the packet length.
*/
cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
packet_length - frag_len : packet_length);
/*
* CURRENT LENGTH:
* - transmit frame length in microseconds
* - seems to be derived from frame length
* - see Cal_Us_Service() in zdinlinef.h
* - if macp->bTxBurstEnable is enabled, then multiply by 4
* - bTxBurstEnable is never set in the vendor driver
*
* SERVICE:
* - "for PLCP configuration"
* - always 0 except in some situations at 802.11b 11M
* - see line 53 of zdinlinef.h
*/
cs->service = 0;
r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
le16_to_cpu(cs->tx_length));
if (r < 0)
return r;
cs->current_length = cpu_to_le16(r);
if (next_frag_len == 0) {
cs->next_frame_length = 0;
} else {
r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
next_frag_len);
if (r < 0)
return r;
cs->next_frame_length = cpu_to_le16(r);
}
return 0;
}
int zd_usb_enable_int(struct zd_usb *usb)
{
int r;
struct usb_device *udev = zd_usb_to_usbdev(usb);
struct zd_usb_interrupt *intr = &usb->intr;
struct urb *urb;
dev_dbg_f(zd_usb_dev(usb), "\n");
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
r = -ENOMEM;
goto out;
}
ZD_ASSERT(!irqs_disabled());
spin_lock_irq(&intr->lock);
if (intr->urb) {
spin_unlock_irq(&intr->lock);
r = 0;
goto error_free_urb;
}
intr->urb = urb;
spin_unlock_irq(&intr->lock);
r = -ENOMEM;
intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER,
GFP_KERNEL, &intr->buffer_dma);
if (!intr->buffer) {
dev_dbg_f(zd_usb_dev(usb),
"couldn't allocate transfer_buffer\n");
goto error_set_urb_null;
}
usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
intr->buffer, USB_MAX_EP_INT_BUFFER,
int_urb_complete, usb,
intr->interval);
urb->transfer_dma = intr->buffer_dma;
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
r = usb_submit_urb(urb, GFP_KERNEL);
if (r) {
dev_dbg_f(zd_usb_dev(usb),
"Couldn't submit urb. Error number %d\n", r);
goto error;
}
return 0;
error:
usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
intr->buffer, intr->buffer_dma);
error_set_urb_null:
spin_lock_irq(&intr->lock);
intr->urb = NULL;
spin_unlock_irq(&intr->lock);
error_free_urb:
usb_free_urb(urb);
out:
return r;
}
