blob: d505b4b69ba4933699ac212681c9dea1e1a8a1df [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* Purpose: Handle USB control endpoint
*
* Author: Warren Hsu
*
* Date: Mar. 29, 2005
*
* Functions:
* vnt_control_out - Write variable length bytes to MEM/BB/MAC/EEPROM
* vnt_control_in - Read variable length bytes from MEM/BB/MAC/EEPROM
* vnt_control_out_u8 - Write one byte to MEM/BB/MAC/EEPROM
* vnt_control_in_u8 - Read one byte from MEM/BB/MAC/EEPROM
*
* Revision History:
* 04-05-2004 Jerry Chen: Initial release
* 11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,
* ControlvMaskByte
*
*/
#include "rxtx.h"
#include "desc.h"
#include "device.h"
#include "usbpipe.h"
#include "mac.h"
#include "rf.h"
#define USB_CTL_WAIT 500 /* ms */
int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
u16 index, u16 length, const u8 *buffer)
{
int ret = 0;
u8 *usb_buffer;
if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
ret = -EINVAL;
goto end;
}
mutex_lock(&priv->usb_lock);
usb_buffer = kmemdup(buffer, length, GFP_KERNEL);
if (!usb_buffer) {
ret = -ENOMEM;
goto end_unlock;
}
ret = usb_control_msg(priv->usb,
usb_sndctrlpipe(priv->usb, 0),
request, 0x40, value,
index, usb_buffer, length, USB_CTL_WAIT);
kfree(usb_buffer);
if (ret == (int)length)
ret = 0;
else
ret = -EIO;
end_unlock:
mutex_unlock(&priv->usb_lock);
end:
return ret;
}
int vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
{
return vnt_control_out(priv, MESSAGE_TYPE_WRITE,
reg_off, reg, sizeof(u8), &data);
}
int vnt_control_out_blocks(struct vnt_private *priv,
u16 block, u8 reg, u16 length, const u8 *data)
{
int ret = 0, i;
for (i = 0; i < length; i += block) {
u16 len = min_t(int, length - i, block);
ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE,
i, reg, len, data + i);
if (ret)
goto end;
}
end:
return ret;
}
int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
u16 index, u16 length, u8 *buffer)
{
int ret = 0;
u8 *usb_buffer;
if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
ret = -EINVAL;
goto end;
}
mutex_lock(&priv->usb_lock);
usb_buffer = kmalloc(length, GFP_KERNEL);
if (!usb_buffer) {
ret = -ENOMEM;
goto end_unlock;
}
ret = usb_control_msg(priv->usb,
usb_rcvctrlpipe(priv->usb, 0),
request, 0xc0, value,
index, usb_buffer, length, USB_CTL_WAIT);
if (ret == length)
memcpy(buffer, usb_buffer, length);
kfree(usb_buffer);
if (ret == (int)length)
ret = 0;
else
ret = -EIO;
end_unlock:
mutex_unlock(&priv->usb_lock);
end:
return ret;
}
int vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
{
return vnt_control_in(priv, MESSAGE_TYPE_READ,
reg_off, reg, sizeof(u8), data);
}
static int vnt_int_report_rate(struct vnt_private *priv, u8 pkt_no, u8 tsr)
{
struct vnt_usb_send_context *context;
struct ieee80211_tx_info *info;
u8 tx_retry = (tsr & 0xf0) >> 4;
s8 idx;
if (pkt_no >= priv->num_tx_context)
return -EINVAL;
context = priv->tx_context[pkt_no];
if (!context->skb)
return -EINVAL;
info = IEEE80211_SKB_CB(context->skb);
idx = info->control.rates[0].idx;
ieee80211_tx_info_clear_status(info);
info->status.rates[0].count = tx_retry;
if (!(tsr & TSR_TMO)) {
info->status.rates[0].idx = idx;
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
info->flags |= IEEE80211_TX_STAT_ACK;
}
ieee80211_tx_status_irqsafe(priv->hw, context->skb);
context->in_use = false;
return 0;
}
static void vnt_int_process_data(struct vnt_private *priv)
{
struct vnt_interrupt_data *int_data;
struct ieee80211_low_level_stats *low_stats = &priv->low_stats;
dev_dbg(&priv->usb->dev, "---->s_nsInterruptProcessData\n");
int_data = (struct vnt_interrupt_data *)priv->int_buf.data_buf;
if (int_data->tsr0 & TSR_VALID)
vnt_int_report_rate(priv, int_data->pkt0, int_data->tsr0);
if (int_data->tsr1 & TSR_VALID)
vnt_int_report_rate(priv, int_data->pkt1, int_data->tsr1);
if (int_data->tsr2 & TSR_VALID)
vnt_int_report_rate(priv, int_data->pkt2, int_data->tsr2);
if (int_data->tsr3 & TSR_VALID)
vnt_int_report_rate(priv, int_data->pkt3, int_data->tsr3);
if (!int_data->isr0)
return;
if (int_data->isr0 & ISR_BNTX && priv->op_mode == NL80211_IFTYPE_AP)
vnt_schedule_command(priv, WLAN_CMD_BECON_SEND);
priv->current_tsf = le64_to_cpu(int_data->tsf);
low_stats->dot11RTSSuccessCount += int_data->rts_success;
low_stats->dot11RTSFailureCount += int_data->rts_fail;
low_stats->dot11ACKFailureCount += int_data->ack_fail;
low_stats->dot11FCSErrorCount += int_data->fcs_err;
}
static void vnt_start_interrupt_urb_complete(struct urb *urb)
{
struct vnt_private *priv = urb->context;
int status = urb->status;
switch (status) {
case 0:
case -ETIMEDOUT:
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
return;
default:
break;
}
if (status)
dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
else
vnt_int_process_data(priv);
if (!test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
if (status)
dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
}
int vnt_start_interrupt_urb(struct vnt_private *priv)
{
int ret = 0;
dev_dbg(&priv->usb->dev, "---->Interrupt Polling Thread\n");
usb_fill_int_urb(priv->interrupt_urb,
priv->usb,
usb_rcvintpipe(priv->usb, 1),
priv->int_buf.data_buf,
MAX_INTERRUPT_SIZE,
vnt_start_interrupt_urb_complete,
priv,
priv->int_interval);
ret = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
if (ret)
dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", ret);
return ret;
}
static int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
unsigned long bytes_received)
{
struct ieee80211_hw *hw = priv->hw;
struct ieee80211_supported_band *sband;
struct sk_buff *skb;
struct ieee80211_rx_status *rx_status;
struct vnt_rx_header *head;
struct vnt_rx_tail *tail;
u32 frame_size;
int ii;
u16 rx_bitrate, pay_load_with_padding;
u8 rate_idx = 0;
long rx_dbm;
skb = ptr_rcb->skb;
rx_status = IEEE80211_SKB_RXCB(skb);
/* [31:16]RcvByteCount ( not include 4-byte Status ) */
head = (struct vnt_rx_header *)skb->data;
frame_size = head->wbk_status >> 16;
frame_size += 4;
if (bytes_received != frame_size) {
dev_dbg(&priv->usb->dev, "------- WRONG Length 1\n");
return false;
}
if ((bytes_received > 2372) || (bytes_received <= 40)) {
/* Frame Size error drop this packet.*/
dev_dbg(&priv->usb->dev, "------ WRONG Length 2\n");
return false;
}
/* real Frame Size = USBframe_size -4WbkStatus - 4RxStatus */
/* -8TSF - 4RSR - 4SQ3 - ?Padding */
/* if SQ3 the range is 24~27, if no SQ3 the range is 20~23 */
/*Fix hardware bug => PLCP_Length error */
if (((bytes_received - head->pay_load_len) > 27) ||
((bytes_received - head->pay_load_len) < 24) ||
(bytes_received < head->pay_load_len)) {
dev_dbg(&priv->usb->dev, "Wrong PLCP Length %x\n",
head->pay_load_len);
return false;
}
sband = hw->wiphy->bands[hw->conf.chandef.chan->band];
rx_bitrate = head->rx_rate * 5; /* rx_rate * 5 */
for (ii = 0; ii < sband->n_bitrates; ii++) {
if (sband->bitrates[ii].bitrate == rx_bitrate) {
rate_idx = ii;
break;
}
}
if (ii == sband->n_bitrates) {
dev_dbg(&priv->usb->dev, "Wrong Rx Bit Rate %d\n", rx_bitrate);
return false;
}
pay_load_with_padding = ((head->pay_load_len / 4) +
((head->pay_load_len % 4) ? 1 : 0)) * 4;
tail = (struct vnt_rx_tail *)(skb->data +
sizeof(*head) + pay_load_with_padding);
priv->tsf_time = le64_to_cpu(tail->tsf_time);
if (tail->rsr & (RSR_IVLDTYP | RSR_IVLDLEN))
return false;
vnt_rf_rssi_to_dbm(priv, tail->rssi, &rx_dbm);
priv->bb_pre_ed_rssi = (u8)-rx_dbm + 1;
priv->current_rssi = priv->bb_pre_ed_rssi;
skb_pull(skb, sizeof(*head));
skb_trim(skb, head->pay_load_len);
rx_status->mactime = priv->tsf_time;
rx_status->band = hw->conf.chandef.chan->band;
rx_status->signal = rx_dbm;
rx_status->flag = 0;
rx_status->freq = hw->conf.chandef.chan->center_freq;
if (!(tail->rsr & RSR_CRCOK))
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
rx_status->rate_idx = rate_idx;
if (tail->new_rsr & NEWRSR_DECRYPTOK)
rx_status->flag |= RX_FLAG_DECRYPTED;
ieee80211_rx_irqsafe(priv->hw, skb);
return true;
}
static void vnt_submit_rx_urb_complete(struct urb *urb)
{
struct vnt_rcb *rcb = urb->context;
struct vnt_private *priv = rcb->priv;
switch (urb->status) {
case 0:
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
return;
case -ETIMEDOUT:
default:
dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
break;
}
if (urb->actual_length) {
if (vnt_rx_data(priv, rcb, urb->actual_length)) {
rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
if (!rcb->skb)
return;
} else {
skb_push(rcb->skb, skb_headroom(rcb->skb));
skb_trim(rcb->skb, 0);
}
urb->transfer_buffer = skb_put(rcb->skb,
skb_tailroom(rcb->skb));
}
if (usb_submit_urb(urb, GFP_ATOMIC))
dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");
}
int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb)
{
int ret = 0;
struct urb *urb = rcb->urb;
if (!rcb->skb) {
dev_dbg(&priv->usb->dev, "rcb->skb is null\n");
ret = -EINVAL;
goto end;
}
usb_fill_bulk_urb(urb,
priv->usb,
usb_rcvbulkpipe(priv->usb, 2),
skb_put(rcb->skb, skb_tailroom(rcb->skb)),
MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
vnt_submit_rx_urb_complete,
rcb);
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret)
dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", ret);
end:
return ret;
}
static void vnt_tx_context_complete(struct urb *urb)
{
struct vnt_usb_send_context *context = urb->context;
struct vnt_private *priv = context->priv;
switch (urb->status) {
case 0:
dev_dbg(&priv->usb->dev,
"Write %d bytes\n", urb->actual_length);
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
context->in_use = false;
return;
case -ETIMEDOUT:
default:
dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
break;
}
if (context->type == CONTEXT_DATA_PACKET)
ieee80211_wake_queues(priv->hw);
if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
if (context->skb)
ieee80211_free_txskb(priv->hw, context->skb);
context->in_use = false;
}
}
int vnt_tx_context(struct vnt_private *priv,
struct vnt_usb_send_context *context,
struct sk_buff *skb)
{
struct vnt_tx_usb_header *usb;
struct urb *urb;
int status;
u16 count = skb->len;
usb = skb_push(skb, sizeof(*usb));
usb->tx_byte_count = cpu_to_le16(count);
usb->pkt_no = context->pkt_no;
usb->type = context->type;
if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
context->in_use = false;
return -ENODEV;
}
if (skb->len > MAX_TOTAL_SIZE_WITH_ALL_HEADERS) {
context->in_use = false;
return -E2BIG;
}
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb) {
context->in_use = false;
return -ENOMEM;
}
usb_fill_bulk_urb(urb,
priv->usb,
usb_sndbulkpipe(priv->usb, 3),
skb->data,
skb->len,
vnt_tx_context_complete,
context);
usb_anchor_urb(urb, &priv->tx_submitted);
status = usb_submit_urb(urb, GFP_ATOMIC);
if (status) {
dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
usb_unanchor_urb(urb);
context->in_use = false;
}
usb_free_urb(urb);
return status;
}