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openwifi/driver/sdr.c
Xianjun Jiao 441850b113 NO code change. Formating
2023-02-09 16:14:10 +01:00

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107 KiB
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// Author: Xianjun Jiao, Michael Mehari, Wei Liu, Jetmir Haxhibeqiri, Pablo Avila Campos
// SPDX-FileCopyrightText: 2022 UGent
// SPDX-License-Identifier: AGPL-3.0-or-later
#include <linux/bitops.h>
#include <linux/dmapool.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/of_irq.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/dmaengine.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/of_dma.h>
#include <linux/platform_device.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/sched/task.h>
#include <linux/dma/xilinx_dma.h>
#include <linux/spi/spi.h>
#include <net/mac80211.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/gpio.h>
#include <linux/leds.h>
// #include <linux/time.h>
#define IIO_AD9361_USE_PRIVATE_H_
#include <../../drivers/iio/adc/ad9361_regs.h>
#include <../../drivers/iio/adc/ad9361.h>
#include <../../drivers/iio/adc/ad9361_private.h>
#include <../../drivers/iio/frequency/cf_axi_dds.h>
extern int ad9361_get_tx_atten(struct ad9361_rf_phy *phy, u32 tx_num);
extern int ad9361_set_tx_atten(struct ad9361_rf_phy *phy, u32 atten_mdb,
bool tx1, bool tx2, bool immed);
extern int ad9361_ctrl_outs_setup(struct ad9361_rf_phy *phy,
struct ctrl_outs_control *ctrl);
extern int ad9361_do_calib_run(struct ad9361_rf_phy *phy, u32 cal, int arg);
#include "../user_space/sdrctl_src/nl80211_testmode_def.h"
#include "hw_def.h"
#include "sdr.h"
#include "git_rev.h"
// driver API of component driver
extern struct tx_intf_driver_api *tx_intf_api;
extern struct rx_intf_driver_api *rx_intf_api;
extern struct openofdm_tx_driver_api *openofdm_tx_api;
extern struct openofdm_rx_driver_api *openofdm_rx_api;
extern struct xpu_driver_api *xpu_api;
u32 gen_mpdu_crc(u8 *data_in, u32 num_bytes);
u8 gen_mpdu_delim_crc(u16 m);
u32 reverse32(u32 d);
static int openwifi_set_antenna(struct ieee80211_hw *dev, u32 tx_ant, u32 rx_ant);
static int openwifi_get_antenna(struct ieee80211_hw *dev, u32 *tx_ant, u32 *rx_ant);
int rssi_half_db_to_rssi_dbm(int rssi_half_db, int rssi_correction);
int rssi_dbm_to_rssi_half_db(int rssi_dbm, int rssi_correction);
int rssi_correction_lookup_table(u32 freq_MHz);
void ad9361_tx_calibration(struct openwifi_priv *priv, u32 actual_tx_lo);
void openwifi_rf_rx_update_after_tuning(struct openwifi_priv *priv, u32 actual_rx_lo);
#include "sdrctl_intf.c"
#include "sysfs_intf.c"
static int test_mode = 0; // bit0: aggregation enable(1)/disable(0); NO USE ANY MORE: bit1: tx offset tuning enable(0)/disable(1)
// Internal indication variables after parsing test_mode
static bool AGGR_ENABLE = false;
static bool TX_OFFSET_TUNING_ENABLE = false;
static int init_tx_att = 0;
MODULE_AUTHOR("Xianjun Jiao");
MODULE_DESCRIPTION("SDR driver");
MODULE_LICENSE("GPL v2");
module_param(test_mode, int, 0);
MODULE_PARM_DESC(myint, "test_mode. bit0: aggregation enable(1)/disable(0)");
module_param(init_tx_att, int, 0);
MODULE_PARM_DESC(myint, "init_tx_att. TX attenuation in dB*1000 example: set to 3000 for 3dB attenuation");
// ---------------rfkill---------------------------------------
static bool openwifi_is_radio_enabled(struct openwifi_priv *priv)
{
int reg;
if (priv->tx_intf_cfg==TX_INTF_BW_20MHZ_AT_0MHZ_ANT0 || priv->tx_intf_cfg==TX_INTF_BW_20MHZ_AT_N_10MHZ_ANT0 || priv->tx_intf_cfg==TX_INTF_BW_20MHZ_AT_0MHZ_ANT_BOTH)
reg = ad9361_get_tx_atten(priv->ad9361_phy, 1);
else
reg = ad9361_get_tx_atten(priv->ad9361_phy, 2);
if (reg == (AD9361_RADIO_ON_TX_ATT+priv->rf_reg_val[RF_TX_REG_IDX_ATT]))
return true;// 0 off, 1 on
return false;
}
void openwifi_rfkill_init(struct ieee80211_hw *hw)
{
struct openwifi_priv *priv = hw->priv;
priv->rfkill_off = openwifi_is_radio_enabled(priv);
printk("%s openwifi_rfkill_init: wireless switch is %s\n", sdr_compatible_str, priv->rfkill_off ? "on" : "off");
wiphy_rfkill_set_hw_state(hw->wiphy, !priv->rfkill_off);
wiphy_rfkill_start_polling(hw->wiphy);
}
void openwifi_rfkill_poll(struct ieee80211_hw *hw)
{
bool enabled;
struct openwifi_priv *priv = hw->priv;
enabled = openwifi_is_radio_enabled(priv);
// printk("%s openwifi_rfkill_poll: wireless radio switch turned %s\n", sdr_compatible_str, enabled ? "on" : "off");
if (unlikely(enabled != priv->rfkill_off)) {
priv->rfkill_off = enabled;
printk("%s openwifi_rfkill_poll: WARNING wireless radio switch turned %s\n", sdr_compatible_str, enabled ? "on" : "off");
wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
}
}
void openwifi_rfkill_exit(struct ieee80211_hw *hw)
{
printk("%s openwifi_rfkill_exit\n", sdr_compatible_str);
wiphy_rfkill_stop_polling(hw->wiphy);
}
//----------------rfkill end-----------------------------------
inline int rssi_dbm_to_rssi_half_db(int rssi_dbm, int rssi_correction)
{
return ((rssi_correction+rssi_dbm)<<1);
}
inline int rssi_correction_lookup_table(u32 freq_MHz)
{
int rssi_correction;
if (freq_MHz<2412) {
rssi_correction = 153;
} else if (freq_MHz<=2484) {
rssi_correction = 153;
} else if (freq_MHz<5160) {
rssi_correction = 153;
} else if (freq_MHz<=5240) {
rssi_correction = 145;
} else if (freq_MHz<=5320) {
rssi_correction = 145;
} else {
rssi_correction = 145;
}
return rssi_correction;
}
inline void ad9361_tx_calibration(struct openwifi_priv *priv, u32 actual_tx_lo)
{
// struct timespec64 tv;
// unsigned long time_before = 0;
// unsigned long time_after = 0;
u32 spi_disable;
priv->last_tx_quad_cal_lo = actual_tx_lo;
// do_gettimeofday(&tv);
// time_before = tv.tv_usec + ((u64)1000000ull)*((u64)tv.tv_sec );
spi_disable = xpu_api->XPU_REG_SPI_DISABLE_read(); // backup current fpga spi disable state
xpu_api->XPU_REG_SPI_DISABLE_write(1); // disable FPGA SPI module
ad9361_do_calib_run(priv->ad9361_phy, TX_QUAD_CAL, (int)priv->ad9361_phy->state->last_tx_quad_cal_phase);
xpu_api->XPU_REG_SPI_DISABLE_write(spi_disable); // restore original SPI disable state
// do_gettimeofday(&tv);
// time_after = tv.tv_usec + ((u64)1000000ull)*((u64)tv.tv_sec );
// printk("%s ad9361_tx_calibration %dMHz tx_quad_cal duration %lu us\n", sdr_compatible_str, actual_tx_lo, time_after-time_before);
printk("%s ad9361_tx_calibration %dMHz tx_quad_cal duration unknown us\n", sdr_compatible_str, actual_tx_lo);
}
inline void openwifi_rf_rx_update_after_tuning(struct openwifi_priv *priv, u32 actual_rx_lo)
{
int static_lbt_th, auto_lbt_th, fpga_lbt_th, receiver_rssi_dbm_th, receiver_rssi_th;
// get rssi correction value from lookup table
priv->rssi_correction = rssi_correction_lookup_table(actual_rx_lo);
// set appropriate lbt threshold
auto_lbt_th = rssi_dbm_to_rssi_half_db(-62, priv->rssi_correction); // -62dBm
static_lbt_th = rssi_dbm_to_rssi_half_db(-(priv->drv_xpu_reg_val[DRV_XPU_REG_IDX_LBT_TH]), priv->rssi_correction);
fpga_lbt_th = (priv->drv_xpu_reg_val[DRV_XPU_REG_IDX_LBT_TH]==0?auto_lbt_th:static_lbt_th);
xpu_api->XPU_REG_LBT_TH_write(fpga_lbt_th);
priv->last_auto_fpga_lbt_th = auto_lbt_th;
// Set rssi_half_db threshold (-85dBm equivalent) to receiver. Receiver will not react to signal lower than this rssi. See test records (OPENOFDM_RX_POWER_THRES_INIT in hw_def.h)
receiver_rssi_dbm_th = (priv->drv_rx_reg_val[DRV_RX_REG_IDX_DEMOD_TH]==0?OPENOFDM_RX_RSSI_DBM_TH_DEFAULT:(-priv->drv_rx_reg_val[DRV_RX_REG_IDX_DEMOD_TH]));
receiver_rssi_th = rssi_dbm_to_rssi_half_db(receiver_rssi_dbm_th, priv->rssi_correction);
openofdm_rx_api->OPENOFDM_RX_REG_POWER_THRES_write((OPENOFDM_RX_DC_RUNNING_SUM_TH_INIT<<16)|receiver_rssi_th);
if (actual_rx_lo < 2500) {
if (priv->band != BAND_2_4GHZ) {
priv->band = BAND_2_4GHZ;
xpu_api->XPU_REG_BAND_CHANNEL_write( (priv->use_short_slot<<24)|(priv->band<<16) );
}
} else {
if (priv->band != BAND_5_8GHZ) {
priv->band = BAND_5_8GHZ;
xpu_api->XPU_REG_BAND_CHANNEL_write( (priv->use_short_slot<<24)|(priv->band<<16) );
}
}
printk("%s openwifi_rf_rx_update_after_tuning %dMHz rssi_correction %d fpga_lbt_th %d(%ddBm) auto %d static %d receiver th %d(%ddBm)\n", sdr_compatible_str,
actual_rx_lo, priv->rssi_correction, fpga_lbt_th, rssi_half_db_to_rssi_dbm(fpga_lbt_th, priv->rssi_correction), auto_lbt_th, static_lbt_th, receiver_rssi_th, receiver_rssi_dbm_th);
}
static void ad9361_rf_set_channel(struct ieee80211_hw *dev,
struct ieee80211_conf *conf)
{
struct openwifi_priv *priv = dev->priv;
u32 actual_rx_lo = conf->chandef.chan->center_freq - priv->rx_freq_offset_to_lo_MHz;
u32 actual_tx_lo;
u32 diff_tx_lo;
bool change_flag = (actual_rx_lo != priv->actual_rx_lo);
if (change_flag && priv->rf_reg_val[RF_TX_REG_IDX_FREQ_MHZ]==0 && priv->rf_reg_val[RF_RX_REG_IDX_FREQ_MHZ]==0) {
actual_tx_lo = conf->chandef.chan->center_freq - priv->tx_freq_offset_to_lo_MHz;
diff_tx_lo = priv->last_tx_quad_cal_lo > actual_tx_lo ? priv->last_tx_quad_cal_lo - actual_tx_lo : actual_tx_lo - priv->last_tx_quad_cal_lo;
// -------------------Tx Lo tuning-------------------
clk_set_rate(priv->ad9361_phy->clks[TX_RFPLL], ( ((u64)1000000ull)*((u64)actual_tx_lo) )>>1);
priv->actual_tx_lo = actual_tx_lo;
// -------------------Rx Lo tuning-------------------
clk_set_rate(priv->ad9361_phy->clks[RX_RFPLL], ( ((u64)1000000ull)*((u64)actual_rx_lo) )>>1);
priv->actual_rx_lo = actual_rx_lo;
// call Tx Quadrature calibration if frequency change is more than 100MHz
if (diff_tx_lo > 100)
ad9361_tx_calibration(priv, actual_tx_lo);
openwifi_rf_rx_update_after_tuning(priv, actual_rx_lo);
printk("%s ad9361_rf_set_channel %dMHz done\n", sdr_compatible_str,conf->chandef.chan->center_freq);
}
}
const struct openwifi_rf_ops ad9361_rf_ops = {
.name = "ad9361",
// .init = ad9361_rf_init,
// .stop = ad9361_rf_stop,
.set_chan = ad9361_rf_set_channel,
// .calc_rssi = ad9361_rf_calc_rssi,
};
u16 reverse16(u16 d) {
union u16_byte2 tmp0, tmp1;
tmp0.a = d;
tmp1.c[0] = tmp0.c[1];
tmp1.c[1] = tmp0.c[0];
return(tmp1.a);
}
u32 reverse32(u32 d) {
union u32_byte4 tmp0, tmp1;
tmp0.a = d;
tmp1.c[0] = tmp0.c[3];
tmp1.c[1] = tmp0.c[2];
tmp1.c[2] = tmp0.c[1];
tmp1.c[3] = tmp0.c[0];
return(tmp1.a);
}
static int openwifi_init_tx_ring(struct openwifi_priv *priv, int ring_idx)
{
struct openwifi_ring *ring = &(priv->tx_ring[ring_idx]);
int i;
ring->stop_flag = -1;
ring->bd_wr_idx = 0;
ring->bd_rd_idx = 0;
ring->bds = kmalloc(sizeof(struct openwifi_buffer_descriptor)*NUM_TX_BD,GFP_KERNEL);
if (ring->bds==NULL) {
printk("%s openwifi_init_tx_ring: WARNING Cannot allocate TX ring\n",sdr_compatible_str);
return -ENOMEM;
}
for (i = 0; i < NUM_TX_BD; i++) {
ring->bds[i].skb_linked=NULL; // for tx, skb is from upper layer
//at first right after skb allocated, head, data, tail are the same.
ring->bds[i].dma_mapping_addr = 0; // for tx, mapping is done after skb is received from upper layer in tx routine
ring->bds[i].seq_no = 0xffff; // invalid value
ring->bds[i].prio = 0xff; // invalid value
ring->bds[i].len_mpdu = 0; // invalid value
}
return 0;
}
static void openwifi_free_tx_ring(struct openwifi_priv *priv, int ring_idx)
{
struct openwifi_ring *ring = &(priv->tx_ring[ring_idx]);
int i;
ring->stop_flag = -1;
ring->bd_wr_idx = 0;
ring->bd_rd_idx = 0;
for (i = 0; i < NUM_TX_BD; i++) {
if (ring->bds[i].skb_linked == 0 && ring->bds[i].dma_mapping_addr == 0)
continue;
if (ring->bds[i].dma_mapping_addr != 0)
dma_unmap_single(priv->tx_chan->device->dev, ring->bds[i].dma_mapping_addr,ring->bds[i].skb_linked->len, DMA_MEM_TO_DEV);
// if (ring->bds[i].skb_linked!=NULL)
// dev_kfree_skb(ring->bds[i].skb_linked); // only use dev_kfree_skb when there is exception
if ( (ring->bds[i].dma_mapping_addr != 0 && ring->bds[i].skb_linked == 0) ||
(ring->bds[i].dma_mapping_addr == 0 && ring->bds[i].skb_linked != 0))
printk("%s openwifi_free_tx_ring: WARNING ring %d i %d skb_linked %p dma_mapping_addr %08x\n", sdr_compatible_str,
ring_idx, i, (void*)(ring->bds[i].skb_linked), (unsigned int)(ring->bds[i].dma_mapping_addr));
ring->bds[i].skb_linked=NULL;
ring->bds[i].dma_mapping_addr = 0;
ring->bds[i].seq_no = 0xffff; // invalid value
ring->bds[i].prio = 0xff; // invalid value
ring->bds[i].len_mpdu = 0; // invalid value
}
if (ring->bds)
kfree(ring->bds);
ring->bds = NULL;
}
static int openwifi_init_rx_ring(struct openwifi_priv *priv)
{
int i;
u8 *pdata_tmp;
priv->rx_cyclic_buf = dma_alloc_coherent(priv->rx_chan->device->dev,RX_BD_BUF_SIZE*NUM_RX_BD,&priv->rx_cyclic_buf_dma_mapping_addr,GFP_KERNEL);
if (!priv->rx_cyclic_buf) {
printk("%s openwifi_init_rx_ring: WARNING dma_alloc_coherent failed!\n", sdr_compatible_str);
dma_free_coherent(priv->rx_chan->device->dev,RX_BD_BUF_SIZE*NUM_RX_BD,priv->rx_cyclic_buf,priv->rx_cyclic_buf_dma_mapping_addr);
return(-1);
}
// Set tsft_low and tsft_high to 0. If they are not zero, it means there is a packet in the buffer by DMA
for (i=0; i<NUM_RX_BD; i++) {
pdata_tmp = priv->rx_cyclic_buf + i*RX_BD_BUF_SIZE; // our header insertion is at the beginning
(*((u16*)(pdata_tmp+10))) = 0;
}
printk("%s openwifi_init_rx_ring: NUM_RX_BD %d RX_BD_BUF_SIZE %d pkt existing flag are cleared!\n", sdr_compatible_str,
NUM_RX_BD, RX_BD_BUF_SIZE);
return 0;
}
static void openwifi_free_rx_ring(struct openwifi_priv *priv)
{
if (priv->rx_cyclic_buf)
dma_free_coherent(priv->rx_chan->device->dev,RX_BD_BUF_SIZE*NUM_RX_BD,priv->rx_cyclic_buf,priv->rx_cyclic_buf_dma_mapping_addr);
priv->rx_cyclic_buf_dma_mapping_addr = 0;
priv->rx_cyclic_buf = 0;
}
static int rx_dma_setup(struct ieee80211_hw *dev){
struct openwifi_priv *priv = dev->priv;
struct dma_device *rx_dev = priv->rx_chan->device;
priv->rxd = rx_dev->device_prep_dma_cyclic(priv->rx_chan,priv->rx_cyclic_buf_dma_mapping_addr,RX_BD_BUF_SIZE*NUM_RX_BD,RX_BD_BUF_SIZE,DMA_DEV_TO_MEM,DMA_CTRL_ACK|DMA_PREP_INTERRUPT);
if (!(priv->rxd)) {
openwifi_free_rx_ring(priv);
printk("%s rx_dma_setup: WARNING rx_dev->device_prep_dma_cyclic %p\n", sdr_compatible_str, (void*)(priv->rxd));
return(-1);
}
priv->rxd->callback = 0;
priv->rxd->callback_param = 0;
priv->rx_cookie = priv->rxd->tx_submit(priv->rxd);
if (dma_submit_error(priv->rx_cookie)) {
printk("%s rx_dma_setup: WARNING dma_submit_error(rx_cookie) %d\n", sdr_compatible_str, (u32)(priv->rx_cookie));
return(-1);
}
dma_async_issue_pending(priv->rx_chan);
return(0);
}
inline int rssi_half_db_to_rssi_dbm(int rssi_half_db, int rssi_correction)
{
int rssi_db, rssi_dbm;
rssi_db = (rssi_half_db>>1);
rssi_dbm = rssi_db - rssi_correction;
rssi_dbm = (rssi_dbm < (-128)? (-128) : rssi_dbm);
return rssi_dbm;
}
static irqreturn_t openwifi_rx_interrupt(int irq, void *dev_id)
{
struct ieee80211_hw *dev = dev_id;
struct openwifi_priv *priv = dev->priv;
struct ieee80211_rx_status rx_status = {0};
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
u32 addr1_low32, addr2_low32=0, addr3_low32=0, len, rate_idx, tsft_low, tsft_high, loop_count=0;//, fc_di;
bool ht_flag, short_gi, ht_aggr, ht_aggr_last;
// u32 dma_driver_buf_idx_mod;
u8 *pdata_tmp;
u8 fcs_ok;//, target_buf_idx;//, phy_rx_sn_hw;
s8 signal;
u16 agc_status_and_pkt_exist_flag, rssi_half_db, addr1_high16, addr2_high16=0, addr3_high16=0, seq_no=0;
bool content_ok, len_overflow, is_unicast;
#ifdef USE_NEW_RX_INTERRUPT
int i;
spin_lock(&priv->lock);
for (i=0; i<NUM_RX_BD; i++) {
pdata_tmp = priv->rx_cyclic_buf + i*RX_BD_BUF_SIZE;
agc_status_and_pkt_exist_flag = (*((u16*)(pdata_tmp+10))); //check rx_intf_pl_to_m_axis.v. FPGA TODO: add pkt exist 1bit flag next to gpio_status_lock_by_sig_valid
if ( agc_status_and_pkt_exist_flag==0 ) // no packet in the buffer
continue;
#else
static u8 target_buf_idx_old = 0;
spin_lock(&priv->lock);
while(1) { // loop all rx buffers that have new rx packets
pdata_tmp = priv->rx_cyclic_buf + target_buf_idx_old*RX_BD_BUF_SIZE; // our header insertion is at the beginning
agc_status_and_pkt_exist_flag = (*((u16*)(pdata_tmp+10)));
if ( agc_status_and_pkt_exist_flag==0 ) // no packet in the buffer
break;
#endif
tsft_low = (*((u32*)(pdata_tmp+0 )));
tsft_high = (*((u32*)(pdata_tmp+4 )));
rssi_half_db = (*((u16*)(pdata_tmp+8 )));
len = (*((u16*)(pdata_tmp+12)));
len_overflow = (len>(RX_BD_BUF_SIZE-16)?true:false);
rate_idx = (*((u16*)(pdata_tmp+14)));
ht_flag = ((rate_idx&0x10)!=0);
short_gi = ((rate_idx&0x20)!=0);
ht_aggr = (ht_flag & ((rate_idx&0x40)!=0));
ht_aggr_last = (ht_flag & ((rate_idx&0x80)!=0));
rate_idx = (rate_idx&0x1F);
fcs_ok = ( len_overflow?0:(*(( u8*)(pdata_tmp+16+len-1))) );
//phy_rx_sn_hw = (fcs_ok&(NUM_RX_BD-1));
// phy_rx_sn_hw = (fcs_ok&0x7f);//0x7f is FPGA limitation
// dma_driver_buf_idx_mod = (state.residue&0x7f);
fcs_ok = ((fcs_ok&0x80)!=0);
if ( (len>=14 && (!len_overflow)) && (rate_idx>=8 && rate_idx<=23)) {
// if ( phy_rx_sn_hw!=dma_driver_buf_idx_mod) {
// printk("%s openwifi_rx: WARNING sn %d next buf_idx %d!\n", sdr_compatible_str,phy_rx_sn_hw,dma_driver_buf_idx_mod);
// }
content_ok = true;
} else {
printk("%s openwifi_rx: WARNING content! len%d overflow%d rate_idx%d\n", sdr_compatible_str,
len, len_overflow, rate_idx);
content_ok = false;
}
signal = rssi_half_db_to_rssi_dbm(rssi_half_db, priv->rssi_correction);
hdr = (struct ieee80211_hdr *)(pdata_tmp+16);
if (len>=20) {
addr2_low32 = *((u32*)(hdr->addr2+2));
addr2_high16 = *((u16*)(hdr->addr2));
}
addr1_low32 = *((u32*)(hdr->addr1+2));
addr1_high16 = *((u16*)(hdr->addr1));
if ( priv->drv_rx_reg_val[DRV_RX_REG_IDX_PRINT_CFG]&DMESG_LOG_ANY ) {
if (len>=26) {
addr3_low32 = *((u32*)(hdr->addr3+2));
addr3_high16 = *((u16*)(hdr->addr3));
}
if (len>=28)
seq_no = ( (hdr->seq_ctrl&IEEE80211_SCTL_SEQ)>>4 );
is_unicast = (addr1_low32!=0xffffffff || addr1_high16!=0xffff);
if ( (( is_unicast)&&(priv->drv_rx_reg_val[DRV_RX_REG_IDX_PRINT_CFG]&DMESG_LOG_UNICAST)) ||
((!is_unicast)&&(priv->drv_rx_reg_val[DRV_RX_REG_IDX_PRINT_CFG]&DMESG_LOG_BROADCAST)) ||
(( fcs_ok==0)&&(priv->drv_rx_reg_val[DRV_RX_REG_IDX_PRINT_CFG]&DMESG_LOG_ERROR)) )
printk("%s openwifi_rx: %dB ht%daggr%d/%d sgi%d %dM FC%04x DI%04x ADDR%04x%08x/%04x%08x/%04x%08x SC%d fcs%d buf_idx%d %ddBm\n", sdr_compatible_str,
len, ht_flag, ht_aggr, ht_aggr_last, short_gi, wifi_rate_table[rate_idx], hdr->frame_control, hdr->duration_id,
reverse16(addr1_high16), reverse32(addr1_low32), reverse16(addr2_high16), reverse32(addr2_low32), reverse16(addr3_high16), reverse32(addr3_low32),
#ifdef USE_NEW_RX_INTERRUPT
seq_no, fcs_ok, i, signal);
#else
seq_no, fcs_ok, target_buf_idx_old, signal);
#endif
}
// priv->phy_rx_sn_hw_old = phy_rx_sn_hw;
if (content_ok) {
skb = dev_alloc_skb(len);
if (skb) {
skb_put_data(skb,pdata_tmp+16,len);
rx_status.antenna = priv->runtime_rx_ant_cfg;
// def in ieee80211_rate openwifi_rates 0~11. 0~3 11b(1M~11M), 4~11 11a/g(6M~54M)
rx_status.rate_idx = wifi_rate_table_mapping[rate_idx];
rx_status.signal = signal;
// rx_status.freq = dev->conf.chandef.chan->center_freq;
rx_status.freq = priv->actual_rx_lo;
// rx_status.band = dev->conf.chandef.chan->band;
rx_status.band = (rx_status.freq<2500?NL80211_BAND_2GHZ:NL80211_BAND_5GHZ);
rx_status.mactime = ( ( (u64)tsft_low ) | ( ((u64)tsft_high)<<32 ) );
rx_status.flag |= RX_FLAG_MACTIME_START;
if (!fcs_ok)
rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
if (rate_idx <= 15)
rx_status.encoding = RX_ENC_LEGACY;
else
rx_status.encoding = RX_ENC_HT;
rx_status.bw = RATE_INFO_BW_20;
if (short_gi)
rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
if(ht_aggr)
{
rx_status.ampdu_reference = priv->ampdu_reference;
rx_status.flag |= RX_FLAG_AMPDU_DETAILS | RX_FLAG_AMPDU_LAST_KNOWN;
if (ht_aggr_last)
rx_status.flag |= RX_FLAG_AMPDU_IS_LAST;
}
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); // put rx_status into skb->cb, from now on skb->cb is not dma_dsts any more.
ieee80211_rx_irqsafe(dev, skb); // call mac80211 function
// printk("%s openwifi_rx: addr1_low32 %08x self addr %08x\n", sdr_compatible_str, addr1_low32, ( *( (u32*)(priv->mac_addr+2) ) ));
if (addr1_low32 == ( *( (u32*)(priv->mac_addr+2) ) ) && priv->stat.stat_enable) {
agc_status_and_pkt_exist_flag = (agc_status_and_pkt_exist_flag&0x7f);
if (len>=20) {// rx stat
if (addr2_low32 == priv->stat.rx_target_sender_mac_addr || priv->stat.rx_target_sender_mac_addr==0) {
if ( ieee80211_is_data(hdr->frame_control) ) {
priv->stat.rx_data_pkt_mcs_realtime = rate_idx;
priv->stat.rx_data_pkt_num_total++;
if (!fcs_ok) {
priv->stat.rx_data_pkt_num_fail++;
priv->stat.rx_data_pkt_fail_mcs_realtime = rate_idx;
priv->stat.rx_data_fail_agc_gain_value_realtime = agc_status_and_pkt_exist_flag;
} else {
priv->stat.rx_data_ok_agc_gain_value_realtime = agc_status_and_pkt_exist_flag;
}
} else if ( ieee80211_is_mgmt(hdr->frame_control) ) {
priv->stat.rx_mgmt_pkt_mcs_realtime = rate_idx;
priv->stat.rx_mgmt_pkt_num_total++;
if (!fcs_ok) {
priv->stat.rx_mgmt_pkt_num_fail++;
priv->stat.rx_mgmt_pkt_fail_mcs_realtime = rate_idx;
priv->stat.rx_mgmt_fail_agc_gain_value_realtime = agc_status_and_pkt_exist_flag;
} else {
priv->stat.rx_mgmt_ok_agc_gain_value_realtime = agc_status_and_pkt_exist_flag;
}
}
}
} else if ( ieee80211_is_ack(hdr->frame_control) ) {
priv->stat.rx_ack_pkt_mcs_realtime = rate_idx;
priv->stat.rx_ack_pkt_num_total++;
if (!fcs_ok) {
priv->stat.rx_ack_pkt_num_fail++;
} else {
priv->stat.rx_ack_ok_agc_gain_value_realtime = agc_status_and_pkt_exist_flag;
}
}
}
} else
printk("%s openwifi_rx: WARNING dev_alloc_skb failed!\n", sdr_compatible_str);
if(ht_aggr_last)
priv->ampdu_reference++;
}
(*((u16*)(pdata_tmp+10))) = 0; // clear the field (set by rx_intf_pl_to_m_axis.v) to indicate the packet has been processed
loop_count++;
#ifndef USE_NEW_RX_INTERRUPT
target_buf_idx_old=((target_buf_idx_old+1)&(NUM_RX_BD-1));
#endif
}
if ( loop_count!=1 && (priv->drv_rx_reg_val[DRV_RX_REG_IDX_PRINT_CFG]&DMESG_LOG_ERROR) )
printk("%s openwifi_rx: WARNING loop_count %d\n", sdr_compatible_str,loop_count);
// openwifi_rx_out:
spin_unlock(&priv->lock);
return IRQ_HANDLED;
}
static irqreturn_t openwifi_tx_interrupt(int irq, void *dev_id)
{
struct ieee80211_hw *dev = dev_id;
struct openwifi_priv *priv = dev->priv;
struct openwifi_ring *ring, *drv_ring_tmp;
struct sk_buff *skb;
struct ieee80211_tx_info *info;
struct ieee80211_hdr *hdr;
u32 reg_val1, hw_queue_len, reg_val2, dma_fifo_no_room_flag, num_slot_random, cw, loop_count=0, addr1_low32, mcs_for_sysfs;
u16 seq_no, pkt_cnt, blk_ack_ssn, start_idx;
u8 nof_retx=-1, last_bd_rd_idx, i, prio, queue_idx, nof_retx_stat;
u64 blk_ack_bitmap;
// u16 prio_rd_idx_store[64]={0};
bool tx_fail=false, fpga_queue_has_room=false;
bool use_ht_aggr, pkt_need_ack, use_ht_rate, prio_wake_up_flag = false;
spin_lock(&priv->lock);
while(1) { // loop all packets that have been sent by FPGA
reg_val1 = tx_intf_api->TX_INTF_REG_PKT_INFO1_read();
reg_val2 = tx_intf_api->TX_INTF_REG_PKT_INFO2_read();
blk_ack_bitmap = (tx_intf_api->TX_INTF_REG_PKT_INFO3_read() | ((u64)tx_intf_api->TX_INTF_REG_PKT_INFO4_read())<<32);
if (reg_val1!=0xFFFFFFFF) {
nof_retx = (reg_val1&0xF);
last_bd_rd_idx = ((reg_val1>>5)&(NUM_TX_BD-1));
prio = ((reg_val1>>17)&0x3);
num_slot_random = ((reg_val1>>19)&0x1FF);
//num_slot_random = ((0xFF80000 &reg_val1)>>(2+5+NUM_BIT_MAX_PHY_TX_SN+NUM_BIT_MAX_NUM_HW_QUEUE));
cw = ((reg_val1>>28)&0xF);
//cw = ((0xF0000000 & reg_val1) >> 28);
if(cw > 10) {
cw = 10 ;
num_slot_random += 512 ;
}
pkt_cnt = (reg_val2&0x3F);
blk_ack_ssn = ((reg_val2>>6)&0xFFF);
queue_idx = ((reg_val1>>15)&(MAX_NUM_HW_QUEUE-1));
dma_fifo_no_room_flag = tx_intf_api->TX_INTF_REG_S_AXIS_FIFO_NO_ROOM_read();
hw_queue_len = tx_intf_api->TX_INTF_REG_QUEUE_FIFO_DATA_COUNT_read();
// check which linux prio is stopped by this queue (queue_idx)
for (i=0; i<MAX_NUM_SW_QUEUE; i++) {
drv_ring_tmp = &(priv->tx_ring[i]);
if ( drv_ring_tmp->stop_flag == prio ) {
if ( ((dma_fifo_no_room_flag>>i)&1)==0 && (NUM_TX_BD-((hw_queue_len>>(i*8))&0xFF))>=RING_ROOM_THRESHOLD )
fpga_queue_has_room=true;
else
fpga_queue_has_room=false;
// Wake up Linux queue due to the current fpga queue releases some room
if( priv->drv_tx_reg_val[DRV_TX_REG_IDX_PRINT_CFG]&DMESG_LOG_NORMAL_QUEUE_STOP )
printk("%s openwifi_tx_interrupt: WARNING ieee80211_wake_queue prio%d i%d queue%d no room flag%x hwq len%08x wr%d rd%d\n", sdr_compatible_str,
prio, i, queue_idx, dma_fifo_no_room_flag, hw_queue_len, drv_ring_tmp->bd_wr_idx, last_bd_rd_idx);
if (fpga_queue_has_room) {
prio_wake_up_flag = true;
drv_ring_tmp->stop_flag = -1;
if (priv->stat.stat_enable) {
priv->stat.tx_prio_wakeup_num[prio]++;
priv->stat.tx_queue_wakeup_num[i]++;
}
} else {
if( priv->drv_tx_reg_val[DRV_TX_REG_IDX_PRINT_CFG]&DMESG_LOG_NORMAL_QUEUE_STOP )
printk("%s openwifi_tx_interrupt: WARNING no room! prio_wake_up_flag%d\n", sdr_compatible_str, prio_wake_up_flag);
}
}
}
if (prio_wake_up_flag)
ieee80211_wake_queue(dev, prio);
if (priv->stat.stat_enable) {
priv->stat.tx_prio_interrupt_num[prio] = priv->stat.tx_prio_interrupt_num[prio] + pkt_cnt;
priv->stat.tx_queue_interrupt_num[queue_idx] = priv->stat.tx_queue_interrupt_num[queue_idx] + pkt_cnt;
}
ring = &(priv->tx_ring[queue_idx]);
for(i = 1; i <= pkt_cnt; i++)
{
ring->bd_rd_idx = (last_bd_rd_idx + i - pkt_cnt + 64)%64;
seq_no = ring->bds[ring->bd_rd_idx].seq_no;
if (seq_no == 0xffff) {// it has been forced cleared by the openwifi_tx (due to out-of-order Tx of different queues to the air?)
printk("%s openwifi_tx_interrupt: WARNING wr%d rd%d last_bd_rd_idx%d i%d pkt_cnt%d prio%d fpga q%d hwq len%d bd prio%d len_mpdu%d seq_no%d skb_linked%p dma_mapping_addr%llu\n", sdr_compatible_str,
ring->bd_wr_idx, ring->bd_rd_idx, last_bd_rd_idx, i, pkt_cnt, prio, queue_idx, hw_queue_len, ring->bds[ring->bd_rd_idx].prio, ring->bds[ring->bd_rd_idx].len_mpdu, seq_no, ring->bds[ring->bd_rd_idx].skb_linked, ring->bds[ring->bd_rd_idx].dma_mapping_addr);
continue;
}
skb = ring->bds[ring->bd_rd_idx].skb_linked;
dma_unmap_single(priv->tx_chan->device->dev,ring->bds[ring->bd_rd_idx].dma_mapping_addr,
skb->len, DMA_MEM_TO_DEV);
info = IEEE80211_SKB_CB(skb);
use_ht_aggr = ((info->flags&IEEE80211_TX_CTL_AMPDU)!=0);
ieee80211_tx_info_clear_status(info);
// Aggregation packet
if (use_ht_aggr)
{
start_idx = (seq_no>=blk_ack_ssn) ? (seq_no-blk_ack_ssn) : (seq_no+((~blk_ack_ssn+1)&0x0FFF));
tx_fail = (((blk_ack_bitmap>>start_idx)&0x1)==0);
info->flags |= IEEE80211_TX_STAT_AMPDU;
info->status.ampdu_len = 1;
info->status.ampdu_ack_len = (tx_fail == true) ? 0 : 1;
skb_pull(skb, LEN_MPDU_DELIM);
//skb_trim(skb, num_byte_pad_skb);
}
// Normal packet
else
{
tx_fail = ((blk_ack_bitmap&0x1)==0);
info->flags &= (~IEEE80211_TX_CTL_AMPDU);
}
pkt_need_ack = (!(info->flags & IEEE80211_TX_CTL_NO_ACK));
// do statistics for data packet that needs ack
hdr = (struct ieee80211_hdr *)skb->data;
addr1_low32 = *((u32*)(hdr->addr1+2));
if ( priv->stat.stat_enable && pkt_need_ack && (addr1_low32 == priv->stat.rx_target_sender_mac_addr || priv->stat.rx_target_sender_mac_addr==0) ) {
use_ht_rate = (((info->control.rates[0].flags)&IEEE80211_TX_RC_MCS)!=0);
mcs_for_sysfs = ieee80211_get_tx_rate(dev, info)->hw_value;
if (use_ht_rate)
mcs_for_sysfs = (mcs_for_sysfs | 0x80000000);
if ( ieee80211_is_data(hdr->frame_control) ) {
nof_retx_stat = (nof_retx<=5?nof_retx:5);
priv->stat.tx_data_pkt_need_ack_num_total++;
priv->stat.tx_data_pkt_mcs_realtime = mcs_for_sysfs;
priv->stat.tx_data_pkt_need_ack_num_retx[nof_retx_stat]++;
if (tx_fail) {
priv->stat.tx_data_pkt_need_ack_num_total_fail++;
priv->stat.tx_data_pkt_fail_mcs_realtime = mcs_for_sysfs;
priv->stat.tx_data_pkt_need_ack_num_retx_fail[nof_retx_stat]++;
}
} else if ( ieee80211_is_mgmt(hdr->frame_control) ) {
nof_retx_stat = (nof_retx<=2?nof_retx:2);
priv->stat.tx_mgmt_pkt_need_ack_num_total++;
priv->stat.tx_mgmt_pkt_mcs_realtime = mcs_for_sysfs;
priv->stat.tx_mgmt_pkt_need_ack_num_retx[nof_retx_stat]++;
if (tx_fail) {
priv->stat.tx_mgmt_pkt_need_ack_num_total_fail++;
priv->stat.tx_mgmt_pkt_fail_mcs_realtime = mcs_for_sysfs;
priv->stat.tx_mgmt_pkt_need_ack_num_retx_fail[nof_retx_stat]++;
}
}
}
if ( tx_fail == false )
info->flags |= IEEE80211_TX_STAT_ACK;
info->status.rates[0].count = nof_retx + 1; //according to our test, the 1st rate is the most important. we only do retry on the 1st rate
info->status.rates[1].idx = -1;
// info->status.rates[2].idx = -1;
// info->status.rates[3].idx = -1;//in mac80211.h: #define IEEE80211_TX_MAX_RATES 4
info->status.antenna = priv->runtime_tx_ant_cfg;
if ( ( (!pkt_need_ack)&&(priv->drv_tx_reg_val[DRV_TX_REG_IDX_PRINT_CFG]&DMESG_LOG_BROADCAST) ) || ( (pkt_need_ack)&&(priv->drv_tx_reg_val[DRV_TX_REG_IDX_PRINT_CFG]&DMESG_LOG_UNICAST) ) ){
printk("%s openwifi_tx_interrupt: tx_result [nof_retx %d pass %d] SC%d prio%d q%d wr%d rd%d num_slot%d cw%d hwq len%08x no_room_flag%x\n", sdr_compatible_str,
nof_retx+1, !tx_fail, seq_no, prio, queue_idx, ring->bd_wr_idx, ring->bd_rd_idx, num_slot_random, cw, hw_queue_len, dma_fifo_no_room_flag);
}
ieee80211_tx_status_irqsafe(dev, skb);
ring->bds[ring->bd_rd_idx].prio = 0xff; // invalid value
ring->bds[ring->bd_rd_idx].len_mpdu = 0; // invalid value
ring->bds[ring->bd_rd_idx].seq_no = 0xffff;
ring->bds[ring->bd_rd_idx].skb_linked = NULL;
ring->bds[ring->bd_rd_idx].dma_mapping_addr = 0;
}
loop_count++;
// printk("%s openwifi_tx_interrupt: loop %d prio %d rd %d\n", sdr_compatible_str, loop_count, prio, ring->bd_rd_idx);
} else
break;
}
if ( loop_count!=1 && ((priv->drv_tx_reg_val[DRV_TX_REG_IDX_PRINT_CFG])&DMESG_LOG_ERROR) )
printk("%s openwifi_tx_interrupt: WARNING loop_count %d\n", sdr_compatible_str, loop_count);
spin_unlock(&priv->lock);
return IRQ_HANDLED;
}
u32 crc_table[16] = {0x4DBDF21C, 0x500AE278, 0x76D3D2D4, 0x6B64C2B0, 0x3B61B38C, 0x26D6A3E8, 0x000F9344, 0x1DB88320, 0xA005713C, 0xBDB26158, 0x9B6B51F4, 0x86DC4190, 0xD6D930AC, 0xCB6E20C8, 0xEDB71064, 0xF0000000};
u32 gen_mpdu_crc(u8 *data_in, u32 num_bytes)
{
u32 i, crc = 0;
u8 idx;
for( i = 0; i < num_bytes; i++)
{
idx = (crc & 0x0F) ^ (data_in[i] & 0x0F);
crc = (crc >> 4) ^ crc_table[idx];
idx = (crc & 0x0F) ^ ((data_in[i] >> 4) & 0x0F);
crc = (crc >> 4) ^ crc_table[idx];
}
return crc;
}
u8 gen_mpdu_delim_crc(u16 m)
{
u8 i, temp, c[8] = {1, 1, 1, 1, 1, 1, 1, 1}, mpdu_delim_crc;
for (i = 0; i < 16; i++)
{
temp = c[7] ^ ((m >> i) & 0x01);
c[7] = c[6];
c[6] = c[5];
c[5] = c[4];
c[4] = c[3];
c[3] = c[2];
c[2] = c[1] ^ temp;
c[1] = c[0] ^ temp;
c[0] = temp;
}
mpdu_delim_crc = ((~c[7] & 0x01) << 0) | ((~c[6] & 0x01) << 1) | ((~c[5] & 0x01) << 2) | ((~c[4] & 0x01) << 3) | ((~c[3] & 0x01) << 4) | ((~c[2] & 0x01) << 5) | ((~c[1] & 0x01) << 6) | ((~c[0] & 0x01) << 7);
return mpdu_delim_crc;
}
static inline struct gpio_led_data * //please align with the implementation in leds-gpio.c
cdev_to_gpio_led_data(struct led_classdev *led_cdev)
{
return container_of(led_cdev, struct gpio_led_data, cdev);
}
inline int calc_n_ofdm(int num_octet, int n_dbps)
{
int num_bit, num_ofdm_sym;
num_bit = 22+num_octet*8;
num_ofdm_sym = (num_bit/n_dbps) + ((num_bit%n_dbps)!=0);
return (num_ofdm_sym);
}
inline __le16 gen_ht_duration_id(__le16 frame_control, __le16 aid, u8 qos_hdr, bool use_ht_aggr, u16 rate_hw_value, u16 sifs)
{
// COTS wifi ht QoS data duration field analysis (lots of capture):
// ht non-aggr QoS data: 44, type 2 (data frame) sub-type 8 (1000) 21.7/52/57.8/58.5/65Mbps
// ack ht 36 + 4*[(22+14*8)/78] = 36 + 4*2 = 44
// ack legacy 20 + 4*[(22+14*8)/72] = 20 + 4*2 = 28
// ht non-aggr QoS data: 60, type 2 (data frame) sub-type 8 (1000) 6.5Mbps
// ack ht 36 + 4*[(22+14*8)/26] = 36 + 4*6 = 60
// ack legacy 20 + 4*[(22+14*8)/24] = 20 + 4*6 = 44
// ht aggr QoS data: 52, type 2 (data frame) sub-type 8 (1000) 19.5/28.9/39/57.8/65/72.2Mbps
// ack ht 36 + 4*[(22+32*8)/78] = 36 + 4*4 = 52
// ack legacy 20 + 4*[(22+32*8)/72] = 20 + 4*4 = 36
// ht aggr QoS data: 60, type 2 (data frame) sub-type 8 (1000) 13/14.4Mbps
// ack ht 36 + 4*[(22+32*8)/52] = 36 + 4*6 = 60
// ack legacy 20 + 4*[(22+32*8)/48] = 20 + 4*6 = 44
// ht and legacy rate mapping is ont one on one, instead it is modulation combined with coding rate
// modulate coding ht-mcs ht-n_dbps legacy-mcs legacy-n_dbps
// BPSK 1/2 0 26 4 24
// QPSK 1/2 1 52 6 48
// QPSK 3/4 2 78 7 72
// 16QAM 1/2 3 104 8 96
// 16QAM 3/4 4 156 9 144
// 64QAM 2/3 5 208 10 192
// 64QAM 3/4 6 234 11 216
// conclusion: duration is: assume ack/blk-ack uses legacy, plus SIFS
// other observation: ht always use QoS data, not data (sub-type)
// other observation: management/control frame always in non-ht
__le16 dur = 0;
u16 n_dbps;
int num_octet, num_ofdm_sym;
if (ieee80211_is_pspoll(frame_control)) {
dur = (aid|0xc000);
} else if (ieee80211_is_data_qos(frame_control) && (~(qos_hdr&IEEE80211_QOS_CTL_ACK_POLICY_NOACK))) {
rate_hw_value = (rate_hw_value>6?6:rate_hw_value);
n_dbps = (rate_hw_value==0?wifi_n_dbps_table[4]:wifi_n_dbps_table[rate_hw_value+5]);
num_octet = (use_ht_aggr?32:14); //32 bytes for compressed block ack; 14 bytes for normal ack
num_ofdm_sym = calc_n_ofdm(num_octet, n_dbps);
dur = sifs + 20 + 4*num_ofdm_sym; // 20us legacy preamble
// printk("%s gen_ht_duration_id: num_octet %d n_dbps %d num_ofdm_sym %d dur %d\n", sdr_compatible_str,
// num_octet, n_dbps, num_ofdm_sym, dur);
} else {
printk("%s openwifi_tx: WARNING gen_ht_duration_id wrong pkt type!\n", sdr_compatible_str);
}
return dur;
}
inline void report_pkt_loss_due_to_driver_drop(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct openwifi_priv *priv = dev->priv;
struct ieee80211_tx_info *info;
info = IEEE80211_SKB_CB(skb);
ieee80211_tx_info_clear_status(info);
info->status.rates[0].count = 1;
info->status.rates[1].idx = -1;
info->status.antenna = priv->runtime_tx_ant_cfg;
ieee80211_tx_status_irqsafe(dev, skb);
}
static void openwifi_tx(struct ieee80211_hw *dev,
struct ieee80211_tx_control *control,
struct sk_buff *skb)
{
struct openwifi_priv *priv = dev->priv;
unsigned long flags;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct openwifi_ring *ring = NULL;
struct sk_buff *skb_new; // temp skb for internal use
struct ieee80211_tx_info *info_skipped;
dma_addr_t dma_mapping_addr;
unsigned int i, j, empty_bd_idx = 0;
u16 rate_signal_value, rate_hw_value, len_mpdu, len_psdu, num_dma_symbol, len_mpdu_delim_pad=0, num_byte_pad;
u32 num_dma_byte, addr1_low32, addr2_low32=0, addr3_low32=0, tx_config, cts_reg, phy_hdr_config;//, openofdm_state_history;
u16 addr1_high16, addr2_high16=0, addr3_high16=0, sc, seq_no=0, cts_duration=0, cts_rate_hw_value=0, cts_rate_signal_value=0, sifs, ack_duration=0, traffic_pkt_duration, n_dbps;
u8 pkt_need_ack, retry_limit_raw,use_short_gi,*dma_buf,retry_limit_hw_value,rc_flags,qos_hdr,prio,queue_idx,drv_ring_idx;
bool drv_seqno=false, use_rts_cts, use_cts_protect, ht_aggr_start=false, use_ht_rate, use_ht_aggr, cts_use_traffic_rate=false, force_use_cts_protect=false;
__le16 frame_control,duration_id;
u32 dma_fifo_no_room_flag, hw_queue_len, delay_count=0;
enum dma_status status;
static u32 addr1_low32_prev = -1;
static u16 rate_hw_value_prev = -1;
static u8 pkt_need_ack_prev = -1;
static u16 addr1_high16_prev = -1;
static __le16 duration_id_prev = -1;
static u8 prio_prev = -1;
static u8 retry_limit_raw_prev = -1;
static u8 use_short_gi_prev = -1;
// static bool led_status=0;
// struct gpio_led_data *led_dat = cdev_to_gpio_led_data(priv->led[3]);
// if ( (priv->phy_tx_sn&7) ==0 ) {
// openofdm_state_history = openofdm_rx_api->OPENOFDM_RX_REG_STATE_HISTORY_read();
// if (openofdm_state_history!=openofdm_state_history_old){
// led_status = (~led_status);
// openofdm_state_history_old = openofdm_state_history;
// gpiod_set_value(led_dat->gpiod, led_status);
// }
// }
if (skb->data_len>0) {// more data are not in linear data area skb->data
printk("%s openwifi_tx: WARNING skb->data_len>0\n", sdr_compatible_str);
goto openwifi_tx_early_out;
}
len_mpdu = skb->len;
// get Linux priority/queue setting info and target mac address
prio = skb_get_queue_mapping(skb);
if (prio >= MAX_NUM_HW_QUEUE) {
printk("%s openwifi_tx: WARNING prio%d\n", sdr_compatible_str, prio);
goto openwifi_tx_early_out;
}
addr1_low32 = *((u32*)(hdr->addr1+2));
// ---- DO your idea here! Map Linux/SW "prio" to driver "drv_ring_idx" (then 1on1 to FPGA queue_idx) ---
if (priv->slice_idx == 0xFFFFFFFF) {// use Linux default prio setting, if there isn't any slice config
drv_ring_idx = prio;
} else {// customized prio to drv_ring_idx mapping
// check current packet belonging to which slice/hw-queue
for (i=0; i<MAX_NUM_HW_QUEUE; i++) {
if ( priv->dest_mac_addr_queue_map[i] == addr1_low32 ) {
break;
}
}
drv_ring_idx = (i>=MAX_NUM_HW_QUEUE?prio:i); // if no address is hit
}
ring = &(priv->tx_ring[drv_ring_idx]);
spin_lock_irqsave(&priv->lock, flags);
if (ring->bds[ring->bd_wr_idx].seq_no != 0xffff) { // not cleared yet by interrupt
for (i=1; i<NUM_TX_BD; i++) {
if (ring->bds[(ring->bd_wr_idx+i)&(NUM_TX_BD-1)].seq_no == 0xffff) {
empty_bd_idx = i;
break;
}
}
hw_queue_len = tx_intf_api->TX_INTF_REG_QUEUE_FIFO_DATA_COUNT_read();
if (empty_bd_idx) { // clear all bds before the empty bd and report failure to Linux
if (priv->stat.stat_enable) {
priv->stat.tx_prio_stop0_fake_num[prio]++;
priv->stat.tx_queue_stop0_fake_num[drv_ring_idx]++;
}
for (i=0; i<empty_bd_idx; i++) {
j = ( (ring->bd_wr_idx+i)&(NUM_TX_BD-1) );
printk("%s openwifi_tx: WARNING fake stop queue empty_bd_idx%d i%d lnx prio%d map to q%d stop%d hwq len%d wr%d rd%d bd prio%d len_mpdu%d seq_no%d skb_linked%p dma_mapping_addr%llu\n", sdr_compatible_str,
empty_bd_idx, i, prio, drv_ring_idx, ring->stop_flag, hw_queue_len, ring->bd_wr_idx, ring->bd_rd_idx, ring->bds[j].prio, ring->bds[j].len_mpdu, ring->bds[j].seq_no, ring->bds[j].skb_linked, ring->bds[j].dma_mapping_addr);
// tell Linux this skb failed
skb_new = ring->bds[j].skb_linked;
dma_unmap_single(priv->tx_chan->device->dev,ring->bds[j].dma_mapping_addr,
skb_new->len, DMA_MEM_TO_DEV);
info_skipped = IEEE80211_SKB_CB(skb_new);
ieee80211_tx_info_clear_status(info_skipped);
info_skipped->status.rates[0].count = 1;
info_skipped->status.rates[1].idx = -1;
info_skipped->status.antenna = priv->runtime_tx_ant_cfg;
ieee80211_tx_status_irqsafe(dev, skb_new);
ring->bds[j].prio = 0xff; // invalid value
ring->bds[j].len_mpdu = 0; // invalid value
ring->bds[j].seq_no = 0xffff;
ring->bds[j].skb_linked = NULL;
ring->bds[j].dma_mapping_addr = 0;
}
if (ring->stop_flag != -1) { //the interrupt seems will never come, we need to wake up the queue in case the interrupt will never wake it up
ieee80211_wake_queue(dev, ring->stop_flag);
ring->stop_flag = -1;
}
} else {
j = ring->bd_wr_idx;
printk("%s openwifi_tx: WARNING real stop queue lnx prio%d map to q%d stop%d hwq len%d wr%d rd%d bd prio%d len_mpdu%d seq_no%d skb_linked%p dma_mapping_addr%llu\n", sdr_compatible_str,
prio, drv_ring_idx, ring->stop_flag, hw_queue_len, ring->bd_wr_idx, ring->bd_rd_idx, ring->bds[j].prio, ring->bds[j].len_mpdu, ring->bds[j].seq_no, ring->bds[j].skb_linked, ring->bds[j].dma_mapping_addr);
ieee80211_stop_queue(dev, prio); // here we should stop those prio related to the queue idx flag set in TX_INTF_REG_S_AXIS_FIFO_NO_ROOM_read
ring->stop_flag = prio;
if (priv->stat.stat_enable) {
priv->stat.tx_prio_stop0_real_num[prio]++;
priv->stat.tx_queue_stop0_real_num[drv_ring_idx]++;
}
spin_unlock_irqrestore(&priv->lock, flags);
goto openwifi_tx_early_out;
}
}
spin_unlock_irqrestore(&priv->lock, flags);
// -------------------- end of Map Linux/SW "prio" to driver "drv_ring_idx" ------------------
// get other info from packet header
addr1_high16 = *((u16*)(hdr->addr1));
if (len_mpdu>=20) {
addr2_low32 = *((u32*)(hdr->addr2+2));
addr2_high16 = *((u16*)(hdr->addr2));
}
if (len_mpdu>=26) {
addr3_low32 = *((u32*)(hdr->addr3+2));
addr3_high16 = *((u16*)(hdr->addr3));
}
frame_control=hdr->frame_control;
pkt_need_ack = (!(info->flags&IEEE80211_TX_CTL_NO_ACK));
retry_limit_raw = info->control.rates[0].count;
rc_flags = info->control.rates[0].flags;
use_rts_cts = ((rc_flags&IEEE80211_TX_RC_USE_RTS_CTS)!=0);
use_cts_protect = ((rc_flags&IEEE80211_TX_RC_USE_CTS_PROTECT)!=0);
use_ht_rate = ((rc_flags&IEEE80211_TX_RC_MCS)!=0);
use_short_gi = ((rc_flags&IEEE80211_TX_RC_SHORT_GI)!=0);
use_ht_aggr = ((info->flags&IEEE80211_TX_CTL_AMPDU)!=0);
qos_hdr = (*(ieee80211_get_qos_ctl(hdr)));
// get Linux rate (MCS) setting
rate_hw_value = ieee80211_get_tx_rate(dev, info)->hw_value;
// drv_tx_reg_val[DRV_TX_REG_IDX_RATE]
// override rate legacy: 4:6M, 5:9M, 6:12M, 7:18M, 8:24M, 9:36M, 10:48M, 11:54M
// drv_tx_reg_val[DRV_TX_REG_IDX_RATE_HT]
// override rate ht: 4:6.5M, 5:13M, 6:19.5M,7:26M, 8:39M, 9:52M, 10:58.5M, 11:65M
if ( ieee80211_is_data(hdr->frame_control) ) {//rate override command
if (use_ht_rate && priv->drv_tx_reg_val[DRV_TX_REG_IDX_RATE_HT]>0) {
rate_hw_value = (priv->drv_tx_reg_val[DRV_TX_REG_IDX_RATE_HT]&0xF)-4;
use_short_gi = ((priv->drv_tx_reg_val[DRV_TX_REG_IDX_RATE_HT]&0x10)==0x10);
} else if ((!use_ht_rate) && priv->drv_tx_reg_val[DRV_TX_REG_IDX_RATE]>0)
rate_hw_value = (priv->drv_tx_reg_val[DRV_TX_REG_IDX_RATE]&0xF);
// TODO: need to map rate_hw_value back to info->control.rates[0].idx!!!
}
// Workaround for a FPGA bug: if aggr happens on ht mcs 0, the tx core will never end, running eneless and stuck the low MAC!
if (use_ht_aggr && rate_hw_value==0)
rate_hw_value = 1;
// sifs = (priv->actual_rx_lo<2500?10:16);
sifs = 16; // for ofdm, sifs is always 16
if (use_ht_rate) {
// printk("%s openwifi_tx: rate_hw_value %d aggr %d sifs %d\n", sdr_compatible_str, rate_hw_value, use_ht_aggr, sifs);
hdr->duration_id = gen_ht_duration_id(frame_control, control->sta->aid, qos_hdr, use_ht_aggr, rate_hw_value, sifs); //linux only do it for 11a/g, not for 11n and later
}
duration_id = hdr->duration_id;
if (use_rts_cts)
printk("%s openwifi_tx: WARNING sn %d use_rts_cts is not supported!\n", sdr_compatible_str, ring->bd_wr_idx);
if (use_cts_protect) {
cts_rate_hw_value = ieee80211_get_rts_cts_rate(dev, info)->hw_value;
cts_duration = le16_to_cpu(ieee80211_ctstoself_duration(dev,info->control.vif,len_mpdu,info));
} else if (force_use_cts_protect) { // could override mac80211 setting here.
cts_rate_hw_value = 4; //wifi_mcs_table_11b_force_up[] translate it to 1011(6M)
if (pkt_need_ack)
ack_duration = 44;//assume the ack we wait use 6Mbps: 4*ceil((22+14*8)/24) + 20(preamble+SIGNAL)
n_dbps = (use_ht_rate?wifi_n_dbps_ht_table[rate_hw_value+4]:wifi_n_dbps_table[rate_hw_value]);
traffic_pkt_duration = (use_ht_rate?36:20) + 4*calc_n_ofdm(len_mpdu, n_dbps);
cts_duration = traffic_pkt_duration + sifs + pkt_need_ack*(sifs+ack_duration);
}
// this is 11b stuff
// if (info->flags&IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
// printk("%s openwifi_tx: WARNING IEEE80211_TX_RC_USE_SHORT_PREAMBLE\n", sdr_compatible_str);
if (len_mpdu>=28) {
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) {
priv->seqno += 0x10;
drv_seqno = true;
}
hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
}
sc = hdr->seq_ctrl;
seq_no = (sc&IEEE80211_SCTL_SEQ)>>4;
}
// printk("%s openwifi_tx: rate&try: %d %d %03x; %d %d %03x; %d %d %03x; %d %d %03x\n", sdr_compatible_str,
// info->status.rates[0].idx,info->status.rates[0].count,info->status.rates[0].flags,
// info->status.rates[1].idx,info->status.rates[1].count,info->status.rates[1].flags,
// info->status.rates[2].idx,info->status.rates[2].count,info->status.rates[2].flags,
// info->status.rates[3].idx,info->status.rates[3].count,info->status.rates[3].flags);
// -----------end of preprocess some info from header and skb----------------
// /* HW will perform RTS-CTS when only RTS flags is set.
// * HW will perform CTS-to-self when both RTS and CTS flags are set.
// * RTS rate and RTS duration will be used also for CTS-to-self.
// */
// if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
// tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
// rts_duration = ieee80211_rts_duration(dev, priv->vif[0], // assume all vif have the same config
// len_mpdu, info);
// printk("%s openwifi_tx: rc_flags & IEEE80211_TX_RC_USE_RTS_CTS\n", sdr_compatible_str);
// } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
// tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
// rts_duration = ieee80211_ctstoself_duration(dev, priv->vif[0], // assume all vif have the same config
// len_mpdu, info);
// printk("%s openwifi_tx: rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT\n", sdr_compatible_str);
// }
if(use_ht_aggr)
{
if(ieee80211_is_data_qos(frame_control) == false)
{
printk("%s openwifi_tx: WARNING packet is not QoS packet!\n", sdr_compatible_str);
goto openwifi_tx_early_out;
}
// psdu = [ MPDU DEL | MPDU | CRC | MPDU padding ]
len_mpdu_delim_pad = ((len_mpdu + LEN_PHY_CRC)%4 == 0) ? 0 :(4 - (len_mpdu + LEN_PHY_CRC)%4);
len_psdu = LEN_MPDU_DELIM + len_mpdu + LEN_PHY_CRC + len_mpdu_delim_pad;
if( (addr1_low32 != addr1_low32_prev) || (addr1_high16 != addr1_high16_prev) || (duration_id != duration_id_prev) ||
(rate_hw_value != rate_hw_value_prev) || (use_short_gi != use_short_gi_prev) ||
(prio != prio_prev) || (retry_limit_raw != retry_limit_raw_prev) || (pkt_need_ack != pkt_need_ack_prev) )
{
addr1_low32_prev = addr1_low32;
addr1_high16_prev = addr1_high16;
duration_id_prev = duration_id;
rate_hw_value_prev = rate_hw_value;
use_short_gi_prev = use_short_gi;
prio_prev = prio;
retry_limit_raw_prev = retry_limit_raw;
pkt_need_ack_prev = pkt_need_ack;
ht_aggr_start = true;
}
}
else
{
// psdu = [ MPDU ]
len_psdu = len_mpdu;
// // Don't need to reset _prev variables every time when it is not ht aggr qos data. Reason:
// // 1. In 99.9999% cases, the ht always use qos data and goes to prio/queue_idx 2. By not resetting the variable to -1, we can have continuous aggregation packet operation in FPGA queue 2.
// // 2. In other words, the aggregation operation for queue 2 in FPGA won't be interrupted by other non aggregation packets (control/management/beacon/etc.) that go to queue 0 (or other queues than 2).
// // 3. From wired domain and upper level ( DSCP, AC (0~3), WMM management, 802.11D service classes and user priority (UP) ) to chip/FPGA queue index, thre should be some (complicated) mapping relationship.
// // 4. More decent design is setting these aggregation flags (ht_aggr_start) per queue/prio here in driver. But since now only queue 2 and 0 are used (data goes to queue 2, others go to queue 0) in normal (most) cases, let's not go to the decent (complicated) solution immediately.
// addr1_low32_prev = -1;
// addr1_high16_prev = -1;
// duration_id_prev = -1;
// use_short_gi_prev = -1;
// rate_hw_value_prev = -1;
// prio_prev = -1;
// retry_limit_raw_prev = -1;
// pkt_need_ack_prev = -1;
}
num_dma_symbol = (len_psdu>>TX_INTF_NUM_BYTE_PER_DMA_SYMBOL_IN_BITS) + ((len_psdu&(TX_INTF_NUM_BYTE_PER_DMA_SYMBOL-1))!=0);
if ( ( (!pkt_need_ack)&&(priv->drv_tx_reg_val[DRV_TX_REG_IDX_PRINT_CFG]&DMESG_LOG_BROADCAST) ) || ( (pkt_need_ack)&&(priv->drv_tx_reg_val[DRV_TX_REG_IDX_PRINT_CFG]&DMESG_LOG_UNICAST) ) )
printk("%s openwifi_tx: %dB RC%x %dM FC%04x DI%04x ADDR%04x%08x/%04x%08x/%04x%08x flag%08x QoS%02x SC%d_%d retr%d ack%d prio%d q%d wr%d rd%d\n", sdr_compatible_str,
len_mpdu, rc_flags, (use_ht_rate == false ? wifi_rate_all[rate_hw_value] : wifi_rate_all[rate_hw_value + 12]),frame_control,duration_id,
reverse16(addr1_high16), reverse32(addr1_low32), reverse16(addr2_high16), reverse32(addr2_low32), reverse16(addr3_high16), reverse32(addr3_low32),
info->flags, qos_hdr, seq_no, drv_seqno, retry_limit_raw, pkt_need_ack, prio, drv_ring_idx,
// use_rts_cts,use_cts_protect|force_use_cts_protect,wifi_rate_all[cts_rate_hw_value],cts_duration,
ring->bd_wr_idx,ring->bd_rd_idx);
// check whether the packet is bigger than DMA buffer size
num_dma_byte = (num_dma_symbol<<TX_INTF_NUM_BYTE_PER_DMA_SYMBOL_IN_BITS);
if (num_dma_byte > TX_BD_BUF_SIZE) {
printk("%s openwifi_tx: WARNING sn %d num_dma_byte > TX_BD_BUF_SIZE\n", sdr_compatible_str, ring->bd_wr_idx);
goto openwifi_tx_early_out;
}
// Copy MPDU delimiter and padding into sk_buff
if(use_ht_aggr)
{
// when skb does not have enough headroom, skb_push will cause kernel panic. headroom needs to be extended if necessary
if (skb_headroom(skb)<LEN_MPDU_DELIM) {// in case original skb headroom is not enough to host MPDU delimiter
printk("%s openwifi_tx: WARNING(AGGR) sn %d skb_headroom(skb) %d < LEN_MPDU_DELIM %d\n", sdr_compatible_str, ring->bd_wr_idx, skb_headroom(skb), LEN_MPDU_DELIM);
if ((skb_new = skb_realloc_headroom(skb, LEN_MPDU_DELIM)) == NULL) {
printk("%s openwifi_tx: WARNING sn %d skb_realloc_headroom failed!\n", sdr_compatible_str, ring->bd_wr_idx);
goto openwifi_tx_early_out;
}
if (skb->sk != NULL)
skb_set_owner_w(skb_new, skb->sk);
dev_kfree_skb(skb);
skb = skb_new;
}
skb_push( skb, LEN_MPDU_DELIM );
dma_buf = skb->data;
// fill in MPDU delimiter
*((u16*)(dma_buf+0)) = ((u16)(len_mpdu+LEN_PHY_CRC) << 4) & 0xFFF0;
*((u8 *)(dma_buf+2)) = gen_mpdu_delim_crc(*((u16 *)dma_buf));
*((u8 *)(dma_buf+3)) = 0x4e;
// Extend sk_buff to hold CRC + MPDU padding + empty MPDU delimiter
num_byte_pad = num_dma_byte - (LEN_MPDU_DELIM + len_mpdu);
if (skb_tailroom(skb)<num_byte_pad) {// in case original skb tailroom is not enough to host num_byte_pad
printk("%s openwifi_tx: WARNING(AGGR) sn %d skb_tailroom(skb) %d < num_byte_pad %d!\n", sdr_compatible_str, ring->bd_wr_idx, skb_tailroom(skb), num_byte_pad);
if ((skb_new = skb_copy_expand(skb, skb_headroom(skb), num_byte_pad, GFP_KERNEL)) == NULL) {
printk("%s openwifi_tx: WARNING(AGGR) sn %d skb_copy_expand failed!\n", sdr_compatible_str, ring->bd_wr_idx);
goto openwifi_tx_early_out;
}
if (skb->sk != NULL)
skb_set_owner_w(skb_new, skb->sk);
dev_kfree_skb(skb);
skb = skb_new;
}
skb_put( skb, num_byte_pad );
// fill in MPDU CRC
*((u32*)(dma_buf+LEN_MPDU_DELIM+len_mpdu)) = gen_mpdu_crc(dma_buf+LEN_MPDU_DELIM, len_mpdu);
// fill in MPDU delimiter padding
memset(dma_buf+LEN_MPDU_DELIM+len_mpdu+LEN_PHY_CRC, 0, len_mpdu_delim_pad);
// num_dma_byte is on 8-byte boundary and len_psdu is on 4 byte boundary.
// If they have different lengths, add "empty MPDU delimiter" for alignment
if(num_dma_byte == len_psdu + 4)
{
*((u32*)(dma_buf+len_psdu)) = 0x4e140000;
len_psdu = num_dma_byte;
}
}
else
{
// Extend sk_buff to hold padding
num_byte_pad = num_dma_byte - len_mpdu;
if (skb_tailroom(skb)<num_byte_pad) {// in case original skb tailroom is not enough to host num_byte_pad
printk("%s openwifi_tx: WARNING sn %d skb_tailroom(skb) %d < num_byte_pad %d!\n", sdr_compatible_str, ring->bd_wr_idx, skb_tailroom(skb), num_byte_pad);
if ((skb_new = skb_copy_expand(skb, skb_headroom(skb), num_byte_pad, GFP_KERNEL)) == NULL) {
printk("%s openwifi_tx: WARNING sn %d skb_copy_expand failed!\n", sdr_compatible_str, ring->bd_wr_idx);
goto openwifi_tx_early_out;
}
if (skb->sk != NULL)
skb_set_owner_w(skb_new, skb->sk);
dev_kfree_skb(skb);
skb = skb_new;
}
skb_put( skb, num_byte_pad );
dma_buf = skb->data;
}
// for(i = 0; i <= num_dma_symbol; i++)
// printk("%16llx\n", (*(u64*)(&(dma_buf[i*8]))));
rate_signal_value = (use_ht_rate ? rate_hw_value : wifi_mcs_table_11b_force_up[rate_hw_value]);
retry_limit_hw_value = ( retry_limit_raw==0?0:((retry_limit_raw - 1)&0xF) );
queue_idx = drv_ring_idx; // from driver ring idx to FPGA queue_idx mapping
cts_rate_signal_value = wifi_mcs_table_11b_force_up[cts_rate_hw_value];
cts_reg = ((use_cts_protect|force_use_cts_protect)<<31 | cts_use_traffic_rate<<30 | cts_duration<<8 | cts_rate_signal_value<<4 | rate_signal_value);
tx_config = ( prio<<26 | ring->bd_wr_idx<<20 | queue_idx<<18 | retry_limit_hw_value<<14 | pkt_need_ack<<13 | num_dma_symbol );
phy_hdr_config = ( ht_aggr_start<<20 | rate_hw_value<<16 | use_ht_rate<<15 | use_short_gi<<14 | use_ht_aggr<<13 | len_psdu );
/* We must be sure that tx_flags is written last because the HW
* looks at it to check if the rest of data is valid or not
*/
//wmb();
// entry->flags = cpu_to_le32(tx_flags);
/* We must be sure this has been written before following HW
* register write, because this write will make the HW attempts
* to DMA the just-written data
*/
//wmb();
spin_lock_irqsave(&priv->lock, flags); // from now on, we'd better avoid interrupt because ring->stop_flag is shared with interrupt
// -------------check whether FPGA dma fifo and queue (queue_idx) has enough room-------------
dma_fifo_no_room_flag = tx_intf_api->TX_INTF_REG_S_AXIS_FIFO_NO_ROOM_read();
hw_queue_len = tx_intf_api->TX_INTF_REG_QUEUE_FIFO_DATA_COUNT_read();
if ( ((dma_fifo_no_room_flag>>queue_idx)&1) || ((NUM_TX_BD-((hw_queue_len>>(queue_idx*8))&0xFF))<=RING_ROOM_THRESHOLD) || ring->stop_flag>=0 ) {
if( priv->drv_tx_reg_val[DRV_TX_REG_IDX_PRINT_CFG]&DMESG_LOG_NORMAL_QUEUE_STOP )
printk("%s openwifi_tx: WARNING ieee80211_stop_queue prio%d queue%d no room flag%x hwq len%08x request%d wr%d rd%d\n", sdr_compatible_str,
prio, queue_idx, dma_fifo_no_room_flag, hw_queue_len, num_dma_symbol, ring->bd_wr_idx, ring->bd_rd_idx);
ieee80211_stop_queue(dev, prio); // here we should stop those prio related to the queue idx flag set in TX_INTF_REG_S_AXIS_FIFO_NO_ROOM_read
ring->stop_flag = prio;
if (priv->stat.stat_enable) {
priv->stat.tx_prio_stop1_num[prio]++;
priv->stat.tx_queue_stop1_num[queue_idx]++;
}
// goto openwifi_tx_early_out_after_lock;
}
// --------end of check whether FPGA fifo (queue_idx) has enough room------------
status = dma_async_is_tx_complete(priv->tx_chan, priv->tx_cookie, NULL, NULL);
while(delay_count<100 && status!=DMA_COMPLETE) {
status = dma_async_is_tx_complete(priv->tx_chan, priv->tx_cookie, NULL, NULL);
delay_count++;
udelay(4);
// udelay(priv->stat.dbg_ch1);
}
if (status!=DMA_COMPLETE) {
printk("%s openwifi_tx: WARNING status!=DMA_COMPLETE\n", sdr_compatible_str);
goto openwifi_tx_early_out_after_lock;
}
//-------------------------fire skb DMA to hardware----------------------------------
dma_mapping_addr = dma_map_single(priv->tx_chan->device->dev, dma_buf,
num_dma_byte, DMA_MEM_TO_DEV);
if (dma_mapping_error(priv->tx_chan->device->dev,dma_mapping_addr)) {
// dev_err(priv->tx_chan->device->dev, "sdr,sdr openwifi_tx: WARNING TX DMA mapping error\n");
printk("%s openwifi_tx: WARNING sn %d TX DMA mapping error\n", sdr_compatible_str, ring->bd_wr_idx);
goto openwifi_tx_early_out_after_lock;
}
sg_init_table(&(priv->tx_sg), 1); // only need to be initialized once in openwifi_start
sg_dma_address( &(priv->tx_sg) ) = dma_mapping_addr;
sg_dma_len( &(priv->tx_sg) ) = num_dma_byte;
tx_intf_api->TX_INTF_REG_CTS_TOSELF_CONFIG_write(cts_reg);
tx_intf_api->TX_INTF_REG_TX_CONFIG_write(tx_config);
tx_intf_api->TX_INTF_REG_PHY_HDR_CONFIG_write(phy_hdr_config);
priv->txd = priv->tx_chan->device->device_prep_slave_sg(priv->tx_chan, &(priv->tx_sg),1,DMA_MEM_TO_DEV, DMA_CTRL_ACK | DMA_PREP_INTERRUPT, NULL);
if (!(priv->txd)) {
printk("%s openwifi_tx: WARNING sn %d device_prep_slave_sg %p\n", sdr_compatible_str, ring->bd_wr_idx, (void*)(priv->txd));
goto openwifi_tx_after_dma_mapping;
}
priv->tx_cookie = priv->txd->tx_submit(priv->txd);
if (dma_submit_error(priv->tx_cookie)) {
printk("%s openwifi_tx: WARNING sn %d dma_submit_error(tx_cookie) %d\n", sdr_compatible_str, ring->bd_wr_idx, (u32)(priv->tx_cookie));
goto openwifi_tx_after_dma_mapping;
}
// seems everything is ok. let's mark this pkt in bd descriptor ring
ring->bds[ring->bd_wr_idx].prio = prio;
ring->bds[ring->bd_wr_idx].len_mpdu = len_mpdu;
ring->bds[ring->bd_wr_idx].seq_no = seq_no;
ring->bds[ring->bd_wr_idx].skb_linked = skb;
ring->bds[ring->bd_wr_idx].dma_mapping_addr = dma_mapping_addr;
ring->bd_wr_idx = ((ring->bd_wr_idx+1)&(NUM_TX_BD-1));
dma_async_issue_pending(priv->tx_chan);
spin_unlock_irqrestore(&priv->lock, flags);
if (priv->stat.stat_enable) {
priv->stat.tx_prio_num[prio]++;
priv->stat.tx_queue_num[queue_idx]++;
}
return;
openwifi_tx_after_dma_mapping:
dma_unmap_single(priv->tx_chan->device->dev, dma_mapping_addr, num_dma_byte, DMA_MEM_TO_DEV);
openwifi_tx_early_out_after_lock:
spin_unlock_irqrestore(&priv->lock, flags);
report_pkt_loss_due_to_driver_drop(dev, skb);
// dev_kfree_skb(skb);
// printk("%s openwifi_tx: WARNING openwifi_tx_after_dma_mapping phy_tx_sn %d queue %d\n", sdr_compatible_str,priv->phy_tx_sn,queue_idx);
return;
openwifi_tx_early_out:
report_pkt_loss_due_to_driver_drop(dev, skb);
// dev_kfree_skb(skb);
// printk("%s openwifi_tx: WARNING openwifi_tx_early_out phy_tx_sn %d queue %d\n", sdr_compatible_str,priv->phy_tx_sn,queue_idx);
}
static int openwifi_set_antenna(struct ieee80211_hw *dev, u32 tx_ant, u32 rx_ant)
{
struct openwifi_priv *priv = dev->priv;
u8 fpga_tx_ant_setting, target_rx_ant;
u32 atten_mdb_tx0, atten_mdb_tx1;
struct ctrl_outs_control ctrl_out;
int ret;
printk("%s openwifi_set_antenna: tx_ant%d rx_ant%d\n",sdr_compatible_str,tx_ant,rx_ant);
if (tx_ant >= 4 || tx_ant == 0) {
return -EINVAL;
} else if (rx_ant >= 3 || rx_ant == 0) {
return -EINVAL;
}
fpga_tx_ant_setting = ((tx_ant<=2)?(tx_ant):(tx_ant+16));
target_rx_ant = ((rx_ant&1)?0:1);
// try rf chip setting firstly, only update internal state variable when rf chip succeed
atten_mdb_tx0 = ((tx_ant&1)?(AD9361_RADIO_ON_TX_ATT+priv->rf_reg_val[RF_TX_REG_IDX_ATT]):AD9361_RADIO_OFF_TX_ATT);
atten_mdb_tx1 = ((tx_ant&2)?(AD9361_RADIO_ON_TX_ATT+priv->rf_reg_val[RF_TX_REG_IDX_ATT]):AD9361_RADIO_OFF_TX_ATT);
ret = ad9361_set_tx_atten(priv->ad9361_phy, atten_mdb_tx0, true, false, true);
if (ret < 0) {
printk("%s openwifi_set_antenna: WARNING ad9361_set_tx_atten ant0 %d FAIL!\n",sdr_compatible_str, atten_mdb_tx0);
return -EINVAL;
} else {
printk("%s openwifi_set_antenna: ad9361_set_tx_atten ant0 %d OK\n",sdr_compatible_str, atten_mdb_tx0);
}
ret = ad9361_set_tx_atten(priv->ad9361_phy, atten_mdb_tx1, false, true, true);
if (ret < 0) {
printk("%s openwifi_set_antenna: WARNING ad9361_set_tx_atten ant1 %d FAIL!\n",sdr_compatible_str, atten_mdb_tx1);
return -EINVAL;
} else {
printk("%s openwifi_set_antenna: ad9361_set_tx_atten ant1 %d OK\n",sdr_compatible_str, atten_mdb_tx1);
}
ctrl_out.en_mask = priv->ctrl_out.en_mask;
ctrl_out.index = (target_rx_ant==0?AD9361_CTRL_OUT_INDEX_ANT0:AD9361_CTRL_OUT_INDEX_ANT1);
ret = ad9361_ctrl_outs_setup(priv->ad9361_phy, &(ctrl_out));
if (ret < 0) {
printk("%s openwifi_set_antenna: WARNING ad9361_ctrl_outs_setup en_mask 0x%02x index 0x%02x FAIL!\n",sdr_compatible_str, ctrl_out.en_mask, ctrl_out.index);
return -EINVAL;
} else {
printk("%s openwifi_set_antenna: ad9361_ctrl_outs_setup en_mask 0x%02x index 0x%02x\n",sdr_compatible_str, ctrl_out.en_mask, ctrl_out.index);
}
tx_intf_api->TX_INTF_REG_ANT_SEL_write(fpga_tx_ant_setting);
ret = tx_intf_api->TX_INTF_REG_ANT_SEL_read();
if (ret != fpga_tx_ant_setting) {
printk("%s openwifi_set_antenna: WARNING TX_INTF_REG_ANT_SEL_write target %d read back %d\n",sdr_compatible_str, fpga_tx_ant_setting, ret);
return -EINVAL;
} else {
printk("%s openwifi_set_antenna: TX_INTF_REG_ANT_SEL_write value %d\n",sdr_compatible_str, ret);
}
rx_intf_api->RX_INTF_REG_ANT_SEL_write(target_rx_ant);
ret = rx_intf_api->RX_INTF_REG_ANT_SEL_read();
if (ret != target_rx_ant) {
printk("%s openwifi_set_antenna: WARNING RX_INTF_REG_ANT_SEL_write target %d read back %d\n",sdr_compatible_str, target_rx_ant, ret);
return -EINVAL;
} else {
printk("%s openwifi_set_antenna: RX_INTF_REG_ANT_SEL_write value %d\n",sdr_compatible_str, ret);
}
// update internal state variable
priv->runtime_tx_ant_cfg = tx_ant;
priv->runtime_rx_ant_cfg = rx_ant;
if (TX_OFFSET_TUNING_ENABLE)
priv->tx_intf_cfg = ((tx_ant&1)?TX_INTF_BW_20MHZ_AT_N_10MHZ_ANT0:TX_INTF_BW_20MHZ_AT_N_10MHZ_ANT1);//NO USE
else {
if (tx_ant == 3)
priv->tx_intf_cfg = TX_INTF_BW_20MHZ_AT_0MHZ_ANT_BOTH;
else
priv->tx_intf_cfg = ((tx_ant&1)?TX_INTF_BW_20MHZ_AT_0MHZ_ANT0:TX_INTF_BW_20MHZ_AT_0MHZ_ANT1);
}
priv->rx_intf_cfg = (target_rx_ant==0?RX_INTF_BW_20MHZ_AT_0MHZ_ANT0:RX_INTF_BW_20MHZ_AT_0MHZ_ANT1);
priv->ctrl_out.index=ctrl_out.index;
priv->tx_freq_offset_to_lo_MHz = tx_intf_fo_mapping[priv->tx_intf_cfg];
priv->rx_freq_offset_to_lo_MHz = rx_intf_fo_mapping[priv->rx_intf_cfg];
return 0;
}
static int openwifi_get_antenna(struct ieee80211_hw *dev, u32 *tx_ant, u32 *rx_ant)
{
struct openwifi_priv *priv = dev->priv;
*tx_ant = priv->runtime_tx_ant_cfg;
*rx_ant = priv->runtime_rx_ant_cfg;
printk("%s openwifi_get_antenna: tx_ant%d rx_ant%d\n",sdr_compatible_str, *tx_ant, *rx_ant);
printk("%s openwifi_get_antenna: drv tx cfg %d offset %d drv rx cfg %d offset %d drv ctrl_out sel %x\n",sdr_compatible_str,
priv->tx_intf_cfg, priv->tx_freq_offset_to_lo_MHz, priv->rx_intf_cfg, priv->rx_freq_offset_to_lo_MHz, priv->ctrl_out.index);
printk("%s openwifi_get_antenna: fpga tx sel %d rx sel %d\n", sdr_compatible_str,
tx_intf_api->TX_INTF_REG_ANT_SEL_read(), rx_intf_api->RX_INTF_REG_ANT_SEL_read());
printk("%s openwifi_get_antenna: rf tx att0 %d tx att1 %d ctrl_out sel %x\n", sdr_compatible_str,
ad9361_get_tx_atten(priv->ad9361_phy, 1), ad9361_get_tx_atten(priv->ad9361_phy, 2), ad9361_spi_read(priv->ad9361_phy->spi, REG_CTRL_OUTPUT_POINTER));
return 0;
}
static int openwifi_start(struct ieee80211_hw *dev)
{
struct openwifi_priv *priv = dev->priv;
int ret, i;
u32 reg;
for (i=0; i<MAX_NUM_VIF; i++) {
priv->vif[i] = NULL;
}
// //keep software registers persistent between NIC down and up for multiple times
/*memset(priv->drv_tx_reg_val, 0, sizeof(priv->drv_tx_reg_val));
memset(priv->drv_rx_reg_val, 0, sizeof(priv->drv_rx_reg_val));
memset(priv->drv_xpu_reg_val, 0, sizeof(priv->drv_xpu_reg_val));
memset(priv->rf_reg_val,0,sizeof(priv->rf_reg_val));
priv->drv_xpu_reg_val[DRV_XPU_REG_IDX_GIT_REV] = GIT_REV;*/
//turn on radio
openwifi_set_antenna(dev, priv->runtime_tx_ant_cfg, priv->runtime_rx_ant_cfg);
reg = ad9361_get_tx_atten(priv->ad9361_phy, ((priv->runtime_tx_ant_cfg==1 || priv->runtime_tx_ant_cfg==3)?1:2));
if (reg == (AD9361_RADIO_ON_TX_ATT+priv->rf_reg_val[RF_TX_REG_IDX_ATT])) {
priv->rfkill_off = 1;// 0 off, 1 on
printk("%s openwifi_start: rfkill radio on\n",sdr_compatible_str);
}
else
printk("%s openwifi_start: WARNING rfkill radio on failed. tx att read %d require %d\n",sdr_compatible_str, reg, AD9361_RADIO_ON_TX_ATT+priv->rf_reg_val[RF_TX_REG_IDX_ATT]);
rx_intf_api->hw_init(priv->rx_intf_cfg,8,8);
tx_intf_api->hw_init(priv->tx_intf_cfg,8,8,priv->fpga_type);
openofdm_tx_api->hw_init(priv->openofdm_tx_cfg);
openofdm_rx_api->hw_init(priv->openofdm_rx_cfg);
xpu_api->hw_init(priv->xpu_cfg);
xpu_api->XPU_REG_MAC_ADDR_write(priv->mac_addr);
printk("%s openwifi_start: rx_intf_cfg %d openofdm_rx_cfg %d tx_intf_cfg %d openofdm_tx_cfg %d\n",sdr_compatible_str, priv->rx_intf_cfg, priv->openofdm_rx_cfg, priv->tx_intf_cfg, priv->openofdm_tx_cfg);
printk("%s openwifi_start: rx_freq_offset_to_lo_MHz %d tx_freq_offset_to_lo_MHz %d\n",sdr_compatible_str, priv->rx_freq_offset_to_lo_MHz, priv->tx_freq_offset_to_lo_MHz);
tx_intf_api->TX_INTF_REG_INTERRUPT_SEL_write(0x30004); //disable tx interrupt
rx_intf_api->RX_INTF_REG_INTERRUPT_TEST_write(0x100); // disable rx interrupt by interrupt test mode
rx_intf_api->RX_INTF_REG_M_AXIS_RST_write(1); // hold M AXIS in reset status
// priv->rx_chan = dma_request_slave_channel(&(priv->pdev->dev), "rx_dma_s2mm");
priv->rx_chan = dma_request_chan(&(priv->pdev->dev), "rx_dma_s2mm");
if (IS_ERR(priv->rx_chan) || priv->rx_chan==NULL) {
ret = PTR_ERR(priv->rx_chan);
if (ret != -EPROBE_DEFER) {
pr_err("%s openwifi_start: No Rx channel ret %d priv->rx_chan 0x%p\n",sdr_compatible_str, ret, priv->rx_chan);
goto err_dma;
}
}
// priv->tx_chan = dma_request_slave_channel(&(priv->pdev->dev), "tx_dma_mm2s");
priv->tx_chan = dma_request_chan(&(priv->pdev->dev), "tx_dma_mm2s");
if (IS_ERR(priv->tx_chan) || priv->tx_chan==NULL) {
ret = PTR_ERR(priv->tx_chan);
if (ret != -EPROBE_DEFER) {
pr_err("%s openwifi_start: No Tx channel ret %d priv->tx_chan 0x%p\n",sdr_compatible_str, ret, priv->tx_chan);
goto err_dma;
}
}
printk("%s openwifi_start: DMA channel setup successfully. priv->rx_chan 0x%p priv->tx_chan 0x%p\n",sdr_compatible_str, priv->rx_chan, priv->tx_chan);
ret = openwifi_init_rx_ring(priv);
if (ret) {
printk("%s openwifi_start: openwifi_init_rx_ring ret %d\n", sdr_compatible_str,ret);
goto err_free_rings;
}
priv->seqno=0;
for (i=0; i<MAX_NUM_SW_QUEUE; i++) {
if ((ret = openwifi_init_tx_ring(priv, i))) {
printk("%s openwifi_start: openwifi_init_tx_ring %d ret %d\n", sdr_compatible_str, i, ret);
goto err_free_rings;
}
}
if ( (ret = rx_dma_setup(dev)) ) {
printk("%s openwifi_start: rx_dma_setup ret %d\n", sdr_compatible_str,ret);
goto err_free_rings;
}
priv->irq_rx = irq_of_parse_and_map(priv->pdev->dev.of_node, 1);
ret = request_irq(priv->irq_rx, openwifi_rx_interrupt,
IRQF_SHARED, "sdr,rx_pkt_intr", dev);
if (ret) {
wiphy_err(dev->wiphy, "openwifi_start:failed to register IRQ handler openwifi_rx_interrupt\n");
goto err_free_rings;
} else {
printk("%s openwifi_start: irq_rx %d\n", sdr_compatible_str, priv->irq_rx);
}
priv->irq_tx = irq_of_parse_and_map(priv->pdev->dev.of_node, 3);
ret = request_irq(priv->irq_tx, openwifi_tx_interrupt,
IRQF_SHARED, "sdr,tx_itrpt", dev);
if (ret) {
wiphy_err(dev->wiphy, "openwifi_start: failed to register IRQ handler openwifi_tx_interrupt\n");
goto err_free_rings;
} else {
printk("%s openwifi_start: irq_tx %d\n", sdr_compatible_str, priv->irq_tx);
}
rx_intf_api->RX_INTF_REG_INTERRUPT_TEST_write(0x000); // enable rx interrupt get normal fcs valid pass through ddc to ARM
tx_intf_api->TX_INTF_REG_INTERRUPT_SEL_write(0x4); //enable tx interrupt
rx_intf_api->RX_INTF_REG_M_AXIS_RST_write(0); // release M AXIS
xpu_api->XPU_REG_TSF_LOAD_VAL_write(0,0); // reset tsf timer
priv->stat.csma_cfg0 = xpu_api->XPU_REG_FORCE_IDLE_MISC_read();
// disable ad9361 auto calibration and enable openwifi fpga spi control
priv->ad9361_phy->state->auto_cal_en = false; // turn off auto Tx quadrature calib.
priv->ad9361_phy->state->manual_tx_quad_cal_en = true; // turn on manual Tx quadrature calib.
xpu_api->XPU_REG_SPI_DISABLE_write(0);
// normal_out:
printk("%s openwifi_start: normal end\n", sdr_compatible_str);
return 0;
err_free_rings:
openwifi_free_rx_ring(priv);
for (i=0; i<MAX_NUM_SW_QUEUE; i++)
openwifi_free_tx_ring(priv, i);
err_dma:
ret = -1;
printk("%s openwifi_start: abnormal end ret %d\n", sdr_compatible_str, ret);
return ret;
}
static void openwifi_stop(struct ieee80211_hw *dev)
{
struct openwifi_priv *priv = dev->priv;
u32 reg, reg1;
int i;
// enable ad9361 auto calibration and disable openwifi fpga spi control
priv->ad9361_phy->state->auto_cal_en = true; // turn on auto Tx quadrature calib.
priv->ad9361_phy->state->manual_tx_quad_cal_en = false; // turn off manual Tx quadrature calib.
xpu_api->XPU_REG_SPI_DISABLE_write(1);
//turn off radio
#if 1
ad9361_tx_mute(priv->ad9361_phy, 1);
reg = ad9361_get_tx_atten(priv->ad9361_phy, 2);
reg1 = ad9361_get_tx_atten(priv->ad9361_phy, 1);
if (reg == AD9361_RADIO_OFF_TX_ATT && reg1 == AD9361_RADIO_OFF_TX_ATT ) {
priv->rfkill_off = 0;// 0 off, 1 on
printk("%s openwifi_stop: rfkill radio off\n",sdr_compatible_str);
}
else
printk("%s openwifi_stop: WARNING rfkill radio off failed. tx att read %d %d require %d\n",sdr_compatible_str, reg, reg1, AD9361_RADIO_OFF_TX_ATT);
#endif
//ieee80211_stop_queue(dev, 0);
tx_intf_api->TX_INTF_REG_INTERRUPT_SEL_write(0x30004); //disable tx interrupt
rx_intf_api->RX_INTF_REG_INTERRUPT_TEST_write(0x100); // disable fcs_valid by interrupt test mode
rx_intf_api->RX_INTF_REG_M_AXIS_RST_write(1); // hold M AXIS in reset status
for (i=0; i<MAX_NUM_VIF; i++) {
priv->vif[i] = NULL;
}
openwifi_free_rx_ring(priv);
for (i=0; i<MAX_NUM_SW_QUEUE; i++)
openwifi_free_tx_ring(priv, i);
pr_info("%s openwifi_stop: dropped channel %s\n", sdr_compatible_str, dma_chan_name(priv->rx_chan));
dmaengine_terminate_all(priv->rx_chan);
dma_release_channel(priv->rx_chan);
pr_info("%s openwifi_stop: dropped channel %s\n", sdr_compatible_str, dma_chan_name(priv->tx_chan));
dmaengine_terminate_all(priv->tx_chan);
dma_release_channel(priv->tx_chan);
//priv->rf->stop(dev);
free_irq(priv->irq_rx, dev);
free_irq(priv->irq_tx, dev);
// normal_out:
printk("%s openwifi_stop\n", sdr_compatible_str);
}
static u64 openwifi_get_tsf(struct ieee80211_hw *dev,
struct ieee80211_vif *vif)
{
u32 tsft_low, tsft_high;
tsft_low = xpu_api->XPU_REG_TSF_RUNTIME_VAL_LOW_read();
tsft_high = xpu_api->XPU_REG_TSF_RUNTIME_VAL_HIGH_read();
//printk("%s openwifi_get_tsf: %08x%08x\n", sdr_compatible_str,tsft_high,tsft_low);
return( ( (u64)tsft_low ) | ( ((u64)tsft_high)<<32 ) );
}
static void openwifi_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u64 tsf)
{
u32 tsft_high = ((tsf >> 32)&0xffffffff);
u32 tsft_low = (tsf&0xffffffff);
xpu_api->XPU_REG_TSF_LOAD_VAL_write(tsft_high,tsft_low);
printk("%s openwifi_set_tsf: %08x%08x\n", sdr_compatible_str,tsft_high,tsft_low);
}
static void openwifi_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
xpu_api->XPU_REG_TSF_LOAD_VAL_write(0,0);
printk("%s openwifi_reset_tsf\n", sdr_compatible_str);
}
static int openwifi_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
printk("%s openwifi_set_rts_threshold WARNING value %d\n", sdr_compatible_str,value);
return(0);
}
static void openwifi_beacon_work(struct work_struct *work)
{
struct openwifi_vif *vif_priv =
container_of(work, struct openwifi_vif, beacon_work.work);
struct ieee80211_vif *vif =
container_of((void *)vif_priv, struct ieee80211_vif, drv_priv);
struct ieee80211_hw *dev = vif_priv->dev;
struct ieee80211_mgmt *mgmt;
struct sk_buff *skb;
/* don't overflow the tx ring */
if (ieee80211_queue_stopped(dev, 0))
goto resched;
/* grab a fresh beacon */
skb = ieee80211_beacon_get(dev, vif);
if (!skb)
goto resched;
/*
* update beacon timestamp w/ TSF value
* TODO: make hardware update beacon timestamp
*/
mgmt = (struct ieee80211_mgmt *)skb->data;
mgmt->u.beacon.timestamp = cpu_to_le64(openwifi_get_tsf(dev, vif));
/* TODO: use actual beacon queue */
skb_set_queue_mapping(skb, 0);
openwifi_tx(dev, NULL, skb);
resched:
/*
* schedule next beacon
* TODO: use hardware support for beacon timing
*/
schedule_delayed_work(&vif_priv->beacon_work, usecs_to_jiffies(1024 * vif->bss_conf.beacon_int));
// printk("%s openwifi_beacon_work beacon_int %d\n", sdr_compatible_str, vif->bss_conf.beacon_int);
}
static int openwifi_add_interface(struct ieee80211_hw *dev,
struct ieee80211_vif *vif)
{
int i;
struct openwifi_priv *priv = dev->priv;
struct openwifi_vif *vif_priv;
switch (vif->type) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MONITOR:
case NL80211_IFTYPE_MESH_POINT:
break;
default:
return -EOPNOTSUPP;
}
// let's support more than 1 interface
for (i=0; i<MAX_NUM_VIF; i++) {
if (priv->vif[i] == NULL)
break;
}
printk("%s openwifi_add_interface start. vif for loop result %d\n", sdr_compatible_str, i);
if (i==MAX_NUM_VIF)
return -EBUSY;
priv->vif[i] = vif;
/* Initialize driver private area */
vif_priv = (struct openwifi_vif *)&vif->drv_priv;
vif_priv->idx = i;
vif_priv->dev = dev;
INIT_DELAYED_WORK(&vif_priv->beacon_work, openwifi_beacon_work);
vif_priv->enable_beacon = false;
priv->mac_addr[0] = vif->addr[0];
priv->mac_addr[1] = vif->addr[1];
priv->mac_addr[2] = vif->addr[2];
priv->mac_addr[3] = vif->addr[3];
priv->mac_addr[4] = vif->addr[4];
priv->mac_addr[5] = vif->addr[5];
xpu_api->XPU_REG_MAC_ADDR_write(priv->mac_addr); // set mac addr in fpga
printk("%s openwifi_add_interface end with vif idx %d addr %02x:%02x:%02x:%02x:%02x:%02x\n", sdr_compatible_str,vif_priv->idx,
vif->addr[0],vif->addr[1],vif->addr[2],vif->addr[3],vif->addr[4],vif->addr[5]);
return 0;
}
static void openwifi_remove_interface(struct ieee80211_hw *dev,
struct ieee80211_vif *vif)
{
struct openwifi_vif *vif_priv;
struct openwifi_priv *priv = dev->priv;
vif_priv = (struct openwifi_vif *)&vif->drv_priv;
priv->vif[vif_priv->idx] = NULL;
printk("%s openwifi_remove_interface vif idx %d\n", sdr_compatible_str, vif_priv->idx);
}
static int openwifi_config(struct ieee80211_hw *dev, u32 changed)
{
struct openwifi_priv *priv = dev->priv;
struct ieee80211_conf *conf = &dev->conf;
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
if ( priv->stat.restrict_freq_mhz>0 && (conf->chandef.chan->center_freq != priv->stat.restrict_freq_mhz) ) {
printk("%s openwifi_config avoid Linux requested freq %dMHz (restrict freq %dMHz)\n", sdr_compatible_str,
conf->chandef.chan->center_freq, priv->stat.restrict_freq_mhz);
return -EINVAL;
}
priv->rf->set_chan(dev, conf);
} else
printk("%s openwifi_config changed flag %08x\n", sdr_compatible_str, changed);
return 0;
}
static void openwifi_bss_info_changed(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *info,
u32 changed)
{
struct openwifi_priv *priv = dev->priv;
struct openwifi_vif *vif_priv;
u32 bssid_low, bssid_high;
vif_priv = (struct openwifi_vif *)&vif->drv_priv;
//be careful: we don have valid chip, so registers addresses in priv->map->BSSID[0] are not valid! should not print it!
//printk("%s openwifi_bss_info_changed map bssid %02x%02x%02x%02x%02x%02x\n",sdr_compatible_str,priv->map->BSSID[0],priv->map->BSSID[1],priv->map->BSSID[2],priv->map->BSSID[3],priv->map->BSSID[4],priv->map->BSSID[5]);
if (changed & BSS_CHANGED_BSSID) {
printk("%s openwifi_bss_info_changed BSS_CHANGED_BSSID %02x%02x%02x%02x%02x%02x\n",sdr_compatible_str,info->bssid[0],info->bssid[1],info->bssid[2],info->bssid[3],info->bssid[4],info->bssid[5]);
// write new bssid to our HW, and do not change bssid filter
//u32 bssid_filter_high = xpu_api->XPU_REG_BSSID_FILTER_HIGH_read();
bssid_low = ( *( (u32*)(info->bssid) ) );
bssid_high = ( *( (u16*)(info->bssid+4) ) );
//bssid_filter_high = (bssid_filter_high&0x80000000);
//bssid_high = (bssid_high|bssid_filter_high);
xpu_api->XPU_REG_BSSID_FILTER_LOW_write(bssid_low);
xpu_api->XPU_REG_BSSID_FILTER_HIGH_write(bssid_high);
}
if (changed & BSS_CHANGED_BEACON_INT) {
printk("%s openwifi_bss_info_changed WARNING BSS_CHANGED_BEACON_INT %x\n",sdr_compatible_str,info->beacon_int);
}
if (changed & BSS_CHANGED_TXPOWER)
printk("%s openwifi_bss_info_changed WARNING BSS_CHANGED_TXPOWER %x\n",sdr_compatible_str,info->txpower);
if (changed & BSS_CHANGED_ERP_CTS_PROT)
printk("%s openwifi_bss_info_changed WARNING BSS_CHANGED_ERP_CTS_PROT %x\n",sdr_compatible_str,info->use_cts_prot);
if (changed & BSS_CHANGED_BASIC_RATES)
printk("%s openwifi_bss_info_changed WARNING BSS_CHANGED_BASIC_RATES %x\n",sdr_compatible_str,info->basic_rates);
if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_ERP_PREAMBLE)) {
printk("%s openwifi_bss_info_changed WARNING BSS_CHANGED_ERP_SLOT %d BSS_CHANGED_ERP_PREAMBLE %d short slot %d\n",sdr_compatible_str,
changed&BSS_CHANGED_ERP_SLOT,changed&BSS_CHANGED_ERP_PREAMBLE,info->use_short_slot);
if (info->use_short_slot && priv->use_short_slot==false) {
priv->use_short_slot=true;
xpu_api->XPU_REG_BAND_CHANNEL_write( (priv->use_short_slot<<24)|(priv->band<<16) );
} else if ((!info->use_short_slot) && priv->use_short_slot==true) {
priv->use_short_slot=false;
xpu_api->XPU_REG_BAND_CHANNEL_write( (priv->use_short_slot<<24)|(priv->band<<16) );
}
}
if (changed & BSS_CHANGED_BEACON_ENABLED) {
printk("%s openwifi_bss_info_changed WARNING BSS_CHANGED_BEACON_ENABLED\n",sdr_compatible_str);
vif_priv->enable_beacon = info->enable_beacon;
}
if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON)) {
cancel_delayed_work_sync(&vif_priv->beacon_work);
if (vif_priv->enable_beacon) {
schedule_work(&vif_priv->beacon_work.work);
printk("%s openwifi_bss_info_changed WARNING enable_beacon\n",sdr_compatible_str);
}
printk("%s openwifi_bss_info_changed WARNING BSS_CHANGED_BEACON_ENABLED %d BSS_CHANGED_BEACON %d\n",sdr_compatible_str,
changed&BSS_CHANGED_BEACON_ENABLED,changed&BSS_CHANGED_BEACON);
}
}
// helper function
u32 log2val(u32 val){
u32 ret_val = 0 ;
while(val>1){
val = val >> 1 ;
ret_val ++ ;
}
return ret_val ;
}
static int openwifi_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct openwifi_priv *priv = dev->priv;
u32 reg_val, cw_min_exp, cw_max_exp;
if (priv->stat.cw_max_min_cfg == 0) {
printk("%s openwifi_conf_tx: [queue %d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d, aifs and txop ignored\n",
sdr_compatible_str,queue,params->aifs,params->cw_min,params->cw_max,params->txop);
reg_val=xpu_api->XPU_REG_CSMA_CFG_read();
cw_min_exp = (log2val(params->cw_min + 1) & 0x0F);
cw_max_exp = (log2val(params->cw_max + 1) & 0x0F);
switch(queue){
case 0: reg_val = ( (reg_val & 0xFFFFFF00) | ((cw_min_exp | (cw_max_exp << 4)) << 0) ); break;
case 1: reg_val = ( (reg_val & 0xFFFF00FF) | ((cw_min_exp | (cw_max_exp << 4)) << 8) ); break;
case 2: reg_val = ( (reg_val & 0xFF00FFFF) | ((cw_min_exp | (cw_max_exp << 4)) << 16) ); break;
case 3: reg_val = ( (reg_val & 0x00FFFFFF) | ((cw_min_exp | (cw_max_exp << 4)) << 24) ); break;
default: printk("%s openwifi_conf_tx: WARNING queue %d does not exist",sdr_compatible_str, queue); return(0);
}
} else {
reg_val = priv->stat.cw_max_min_cfg;
printk("%s openwifi_conf_tx: override cw max min for q3 to q0: %d %d; %d %d; %d %d; %d %d\n",
sdr_compatible_str,
(1<<((reg_val>>28)&0xF))-1,
(1<<((reg_val>>24)&0xF))-1,
(1<<((reg_val>>20)&0xF))-1,
(1<<((reg_val>>16)&0xF))-1,
(1<<((reg_val>>12)&0xF))-1,
(1<<((reg_val>> 8)&0xF))-1,
(1<<((reg_val>> 4)&0xF))-1,
(1<<((reg_val>> 0)&0xF))-1);
}
xpu_api->XPU_REG_CSMA_CFG_write(reg_val);
return(0);
}
static u64 openwifi_prepare_multicast(struct ieee80211_hw *dev,
struct netdev_hw_addr_list *mc_list)
{
printk("%s openwifi_prepare_multicast\n", sdr_compatible_str);
return netdev_hw_addr_list_count(mc_list);
}
static void openwifi_configure_filter(struct ieee80211_hw *dev,
unsigned int changed_flags,
unsigned int *total_flags,
u64 multicast)
{
struct openwifi_priv *priv = dev->priv;
u32 filter_flag;
(*total_flags) &= SDR_SUPPORTED_FILTERS;
(*total_flags) |= FIF_ALLMULTI; //because we need to pass all multicast (no matter it is for us or not) to upper layer
filter_flag = (*total_flags);
filter_flag = (filter_flag|UNICAST_FOR_US|BROADCAST_ALL_ONE|BROADCAST_ALL_ZERO);
//filter_flag = (filter_flag|UNICAST_FOR_US|BROADCAST_ALL_ONE|BROADCAST_ALL_ZERO|MONITOR_ALL); // all pkt will be delivered to arm
//if (priv->vif[0]->type == NL80211_IFTYPE_MONITOR)
if ((filter_flag&0xf0) == 0xf0) //FIF_BCN_PRBRESP_PROMISC/FIF_CONTROL/FIF_OTHER_BSS/FIF_PSPOLL are set means monitor mode
filter_flag = (filter_flag|MONITOR_ALL);
else
filter_flag = (filter_flag&(~MONITOR_ALL));
if ( !(filter_flag&FIF_BCN_PRBRESP_PROMISC) )
filter_flag = (filter_flag|MY_BEACON);
filter_flag = (filter_flag|FIF_PSPOLL);
if (priv->stat.rx_monitor_all)
filter_flag = (filter_flag|MONITOR_ALL);
xpu_api->XPU_REG_FILTER_FLAG_write(filter_flag|HIGH_PRIORITY_DISCARD_FLAG);
//xpu_api->XPU_REG_FILTER_FLAG_write(filter_flag); //do not discard any pkt
printk("%s openwifi_configure_filter MON %d M_BCN %d BST0 %d BST1 %d UST %d PB_RQ %d PS_PL %d O_BSS %d CTL %d BCN_PRP %d PCP_FL %d FCS_FL %d ALL_MUT %d\n", sdr_compatible_str,
(filter_flag>>13)&1,(filter_flag>>12)&1,(filter_flag>>11)&1,(filter_flag>>10)&1,(filter_flag>>9)&1,(filter_flag>>8)&1,(filter_flag>>7)&1,(filter_flag>>6)&1,(filter_flag>>5)&1,(filter_flag>>4)&1,(filter_flag>>3)&1,(filter_flag>>2)&1,(filter_flag>>1)&1);
}
static int openwifi_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_ampdu_params *params)
{
struct ieee80211_sta *sta = params->sta;
enum ieee80211_ampdu_mlme_action action = params->action;
// struct openwifi_priv *priv = hw->priv;
u16 max_tx_bytes, buf_size;
u32 ampdu_action_config;
if (!AGGR_ENABLE) {
return -EOPNOTSUPP;
}
switch (action)
{
case IEEE80211_AMPDU_TX_START:
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, params->tid);
printk("%s openwifi_ampdu_action: start TX aggregation. tid %d\n", sdr_compatible_str, params->tid);
break;
case IEEE80211_AMPDU_TX_STOP_CONT:
case IEEE80211_AMPDU_TX_STOP_FLUSH:
case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, params->tid);
printk("%s openwifi_ampdu_action: stop TX aggregation. tid %d\n", sdr_compatible_str, params->tid);
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
buf_size = 4;
// buf_size = (params->buf_size) - 1;
max_tx_bytes = (1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + sta->ht_cap.ampdu_factor)) - 1;
ampdu_action_config = ( sta->ht_cap.ampdu_density<<24 | buf_size<<16 | max_tx_bytes );
tx_intf_api->TX_INTF_REG_AMPDU_ACTION_CONFIG_write(ampdu_action_config);
printk("%s openwifi_ampdu_action: TX operational. tid %d max_tx_bytes %d ampdu_density %d buf_size %d\n",
sdr_compatible_str, params->tid, max_tx_bytes, sta->ht_cap.ampdu_density, buf_size);
break;
case IEEE80211_AMPDU_RX_START:
printk("%s openwifi_ampdu_action: start RX aggregation. tid %d\n", sdr_compatible_str, params->tid);
break;
case IEEE80211_AMPDU_RX_STOP:
printk("%s openwifi_ampdu_action: stop RX aggregation. tid %d\n", sdr_compatible_str, params->tid);
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static const struct ieee80211_ops openwifi_ops = {
.tx = openwifi_tx,
.start = openwifi_start,
.stop = openwifi_stop,
.add_interface = openwifi_add_interface,
.remove_interface = openwifi_remove_interface,
.config = openwifi_config,
.set_antenna = openwifi_set_antenna,
.get_antenna = openwifi_get_antenna,
.bss_info_changed = openwifi_bss_info_changed,
.conf_tx = openwifi_conf_tx,
.prepare_multicast = openwifi_prepare_multicast,
.configure_filter = openwifi_configure_filter,
.rfkill_poll = openwifi_rfkill_poll,
.get_tsf = openwifi_get_tsf,
.set_tsf = openwifi_set_tsf,
.reset_tsf = openwifi_reset_tsf,
.set_rts_threshold = openwifi_set_rts_threshold,
.ampdu_action = openwifi_ampdu_action,
.testmode_cmd = openwifi_testmode_cmd,
};
static const struct of_device_id openwifi_dev_of_ids[] = {
{ .compatible = "sdr,sdr", },
{}
};
MODULE_DEVICE_TABLE(of, openwifi_dev_of_ids);
static int custom_match_spi_dev(struct device *dev, const void *data)
{
const char *name = data;
bool ret = sysfs_streq(name, dev->of_node->name);
printk("%s custom_match_spi_dev %s %s %d\n", sdr_compatible_str,name, dev->of_node->name, ret);
return ret;
}
static int custom_match_platform_dev(struct device *dev, const void *data)
{
struct platform_device *plat_dev = to_platform_device(dev);
const char *name = data;
char *name_in_sys_bus_platform_devices = strstr(plat_dev->name, name);
bool match_flag = (name_in_sys_bus_platform_devices != NULL);
if (match_flag) {
printk("%s custom_match_platform_dev %s\n", sdr_compatible_str,plat_dev->name);
}
return(match_flag);
}
static int openwifi_dev_probe(struct platform_device *pdev)
{
struct ieee80211_hw *dev;
struct openwifi_priv *priv;
int err=1, rand_val;
const char *chip_name, *fpga_model;
u32 reg, i;//, reg1;
struct device_node *np = pdev->dev.of_node;
struct device *tmp_dev;
struct platform_device *tmp_pdev;
struct iio_dev *tmp_indio_dev;
// struct gpio_leds_priv *tmp_led_priv;
printk("\n");
if (np) {
const struct of_device_id *match;
match = of_match_node(openwifi_dev_of_ids, np);
if (match) {
printk("%s openwifi_dev_probe: match!\n", sdr_compatible_str);
err = 0;
}
}
if (err)
return err;
dev = ieee80211_alloc_hw(sizeof(*priv), &openwifi_ops);
if (!dev) {
printk(KERN_ERR "%s openwifi_dev_probe: ieee80211 alloc failed\n",sdr_compatible_str);
err = -ENOMEM;
goto err_free_dev;
}
priv = dev->priv;
priv->pdev = pdev;
err = of_property_read_string(of_find_node_by_path("/"), "model", &fpga_model);
if(err < 0) {
printk("%s openwifi_dev_probe: WARNING unknown openwifi FPGA model %d\n",sdr_compatible_str, err);
priv->fpga_type = SMALL_FPGA;
} else {
// LARGE FPGAs (i.e. ZCU102, Z7035, ZC706)
if(strstr(fpga_model, "ZCU102") != NULL || strstr(fpga_model, "Z7035") != NULL || strstr(fpga_model, "ZC706") != NULL)
priv->fpga_type = LARGE_FPGA;
// SMALL FPGA: (i.e. ZED, ZC702, Z7020)
else if(strstr(fpga_model, "ZED") != NULL || strstr(fpga_model, "ZC702") != NULL || strstr(fpga_model, "Z7020") != NULL)
priv->fpga_type = SMALL_FPGA;
}
// //-------------find ad9361-phy driver for lo/channel control---------------
priv->actual_rx_lo = 1000; //Some value aligned with rf_init/rf_init_11n.sh that is not WiFi channel to force ad9361_rf_set_channel execution triggered by Linux
priv->actual_tx_lo = 1000; //Some value aligned with rf_init/rf_init_11n.sh that is not WiFi channel to force ad9361_rf_set_channel execution triggered by Linux
priv->last_tx_quad_cal_lo = 1000;
tmp_dev = bus_find_device( &spi_bus_type, NULL, "ad9361-phy", custom_match_spi_dev );
if (tmp_dev == NULL) {
printk(KERN_ERR "%s find_dev ad9361-phy failed\n",sdr_compatible_str);
err = -ENODEV;
goto err_free_dev;
}
printk("%s bus_find_device ad9361-phy: %s. driver_data pointer %p\n", sdr_compatible_str, ((struct spi_device*)tmp_dev)->modalias, (void*)(((struct spi_device*)tmp_dev)->dev.driver_data));
if (((struct spi_device*)tmp_dev)->dev.driver_data == NULL) {
printk(KERN_ERR "%s find_dev ad9361-phy failed. dev.driver_data == NULL\n",sdr_compatible_str);
err = -ENODEV;
goto err_free_dev;
}
priv->ad9361_phy = ad9361_spi_to_phy((struct spi_device*)tmp_dev);
if (!(priv->ad9361_phy)) {
printk(KERN_ERR "%s ad9361_spi_to_phy failed\n",sdr_compatible_str);
err = -ENODEV;
goto err_free_dev;
}
printk("%s ad9361_spi_to_phy ad9361-phy: %s\n", sdr_compatible_str, priv->ad9361_phy->spi->modalias);
// //-------------find driver: axi_ad9361 hdl ref design module, dac channel---------------
tmp_dev = bus_find_device( &platform_bus_type, NULL, "cf-ad9361-dds-core-lpc", custom_match_platform_dev );
if (!tmp_dev) {
printk(KERN_ERR "%s bus_find_device platform_bus_type cf-ad9361-dds-core-lpc failed\n",sdr_compatible_str);
err = -ENODEV;
goto err_free_dev;
}
tmp_pdev = to_platform_device(tmp_dev);
if (!tmp_pdev) {
printk(KERN_ERR "%s to_platform_device failed\n",sdr_compatible_str);
err = -ENODEV;
goto err_free_dev;
}
tmp_indio_dev = platform_get_drvdata(tmp_pdev);
if (!tmp_indio_dev) {
printk(KERN_ERR "%s platform_get_drvdata failed\n",sdr_compatible_str);
err = -ENODEV;
goto err_free_dev;
}
priv->dds_st = iio_priv(tmp_indio_dev);
if (!(priv->dds_st)) {
printk(KERN_ERR "%s iio_priv failed\n",sdr_compatible_str);
err = -ENODEV;
goto err_free_dev;
}
printk("%s openwifi_dev_probe: cf-ad9361-dds-core-lpc dds_st->version %08x chip_info->name %s\n",sdr_compatible_str,priv->dds_st->version,priv->dds_st->chip_info->name);
cf_axi_dds_datasel(priv->dds_st, -1, DATA_SEL_DMA);
printk("%s openwifi_dev_probe: cf_axi_dds_datasel DATA_SEL_DMA\n",sdr_compatible_str);
// //-------------find driver: axi_ad9361 hdl ref design module, adc channel---------------
// turn off radio by muting tx
// ad9361_tx_mute(priv->ad9361_phy, 1);
// reg = ad9361_get_tx_atten(priv->ad9361_phy, 2);
// reg1 = ad9361_get_tx_atten(priv->ad9361_phy, 1);
// if (reg == AD9361_RADIO_OFF_TX_ATT && reg1 == AD9361_RADIO_OFF_TX_ATT ) {
// priv->rfkill_off = 0;// 0 off, 1 on
// printk("%s openwifi_dev_probe: rfkill radio off\n",sdr_compatible_str);
// }
// else
// printk("%s openwifi_dev_probe: WARNING rfkill radio off failed. tx att read %d %d require %d\n",sdr_compatible_str, reg, reg1, AD9361_RADIO_OFF_TX_ATT);
// //-----------------------------parse the test_mode input--------------------------------
if (test_mode&1)
AGGR_ENABLE = true;
// if (test_mode&2)
// TX_OFFSET_TUNING_ENABLE = false;
priv->rssi_correction = rssi_correction_lookup_table(5220);//5220MHz. this will be set in real-time by _rf_set_channel()
priv->last_auto_fpga_lbt_th = rssi_dbm_to_rssi_half_db(-78, priv->rssi_correction);//-78dBm. a magic value. just to avoid uninitialized
//priv->rf_bw = 20000000; // Signal quality issue! NOT use for now. 20MHz or 40MHz. 40MHz need ddc/duc. 20MHz works in bypass mode
priv->rf_bw = 40000000; // 20MHz or 40MHz. 40MHz need ddc/duc. 20MHz works in bypass mode
priv->xpu_cfg = XPU_NORMAL;
priv->openofdm_tx_cfg = OPENOFDM_TX_NORMAL;
priv->openofdm_rx_cfg = OPENOFDM_RX_NORMAL;
printk("%s openwifi_dev_probe: priv->rf_bw == %dHz. bool for 20000000 %d, 40000000 %d\n",sdr_compatible_str, priv->rf_bw, (priv->rf_bw==20000000) , (priv->rf_bw==40000000) );
if (priv->rf_bw == 20000000) { //DO NOT USE. Not used for long time.
priv->rx_intf_cfg = RX_INTF_BYPASS;
priv->tx_intf_cfg = TX_INTF_BYPASS;
//priv->rx_freq_offset_to_lo_MHz = 0;
//priv->tx_freq_offset_to_lo_MHz = 0;
} else if (priv->rf_bw == 40000000) {
//priv->rx_intf_cfg = RX_INTF_BW_20MHZ_AT_P_10MHZ; //work
//priv->tx_intf_cfg = TX_INTF_BW_20MHZ_AT_N_10MHZ_ANT1; //work
// // test ddc at central, duc at central+10M. It works. And also change rx BW from 40MHz to 20MHz in rf_init.sh. Rx sampling rate is still 40Msps
priv->rx_intf_cfg = RX_INTF_BW_20MHZ_AT_0MHZ_ANT0;
if (TX_OFFSET_TUNING_ENABLE)
priv->tx_intf_cfg = TX_INTF_BW_20MHZ_AT_N_10MHZ_ANT0; // Let's use rx0 tx0 as default mode, because it works for both 9361 and 9364
else
priv->tx_intf_cfg = TX_INTF_BW_20MHZ_AT_0MHZ_ANT0;
// // try another antenna option
//priv->rx_intf_cfg = RX_INTF_BW_20MHZ_AT_0MHZ_ANT1;
//priv->tx_intf_cfg = TX_INTF_BW_20MHZ_AT_N_10MHZ_ANT0;
#if 0
if (priv->rx_intf_cfg == DDC_BW_20MHZ_AT_N_10MHZ) {
priv->rx_freq_offset_to_lo_MHz = -10;
} else if (priv->rx_intf_cfg == DDC_BW_20MHZ_AT_P_10MHZ) {
priv->rx_freq_offset_to_lo_MHz = 10;
} else if (priv->rx_intf_cfg == DDC_BW_20MHZ_AT_0MHZ) {
priv->rx_freq_offset_to_lo_MHz = 0;
} else {
printk("%s openwifi_dev_probe: Warning! priv->rx_intf_cfg == %d\n",sdr_compatible_str,priv->rx_intf_cfg);
}
#endif
} else {
printk("%s openwifi_dev_probe: Warning! priv->rf_bw == %dHz (should be 20000000 or 40000000)\n",sdr_compatible_str, priv->rf_bw);
err = -EBADRQC;
goto err_free_dev;
}
printk("%s openwifi_dev_probe: test_mode %d AGGR_ENABLE %d TX_OFFSET_TUNING_ENABLE %d init_tx_att %d\n", sdr_compatible_str, test_mode, AGGR_ENABLE, TX_OFFSET_TUNING_ENABLE, init_tx_att);
priv->runtime_tx_ant_cfg = ((priv->tx_intf_cfg==TX_INTF_BW_20MHZ_AT_0MHZ_ANT0 || priv->tx_intf_cfg==TX_INTF_BW_20MHZ_AT_N_10MHZ_ANT0)?1:(priv->tx_intf_cfg==TX_INTF_BW_20MHZ_AT_0MHZ_ANT_BOTH?3:2));
priv->runtime_rx_ant_cfg = (priv->rx_intf_cfg==RX_INTF_BW_20MHZ_AT_0MHZ_ANT0?1:2);
priv->ctrl_out.en_mask=AD9361_CTRL_OUT_EN_MASK;
priv->ctrl_out.index =(priv->rx_intf_cfg==RX_INTF_BW_20MHZ_AT_0MHZ_ANT0?AD9361_CTRL_OUT_INDEX_ANT0:AD9361_CTRL_OUT_INDEX_ANT1);
memset(priv->drv_rx_reg_val,0,sizeof(priv->drv_rx_reg_val));
memset(priv->drv_tx_reg_val,0,sizeof(priv->drv_tx_reg_val));
memset(priv->drv_xpu_reg_val,0,sizeof(priv->drv_xpu_reg_val));
memset(priv->rf_reg_val,0,sizeof(priv->rf_reg_val));
priv->rf_reg_val[RF_TX_REG_IDX_ATT] = init_tx_att;
//let's by default turn radio on when probing
err = openwifi_set_antenna(dev, priv->runtime_tx_ant_cfg, priv->runtime_rx_ant_cfg);
if (err) {
printk("%s openwifi_dev_probe: WARNING openwifi_set_antenna FAIL %d\n",sdr_compatible_str, err);
err = -EIO;
goto err_free_dev;
}
reg = ad9361_spi_read(priv->ad9361_phy->spi, REG_CTRL_OUTPUT_POINTER);
printk("%s openwifi_dev_probe: ad9361_spi_read REG_CTRL_OUTPUT_POINTER 0x%02x\n",sdr_compatible_str, reg);
reg = ad9361_spi_read(priv->ad9361_phy->spi, REG_CTRL_OUTPUT_ENABLE);
printk("%s openwifi_dev_probe: ad9361_spi_read REG_CTRL_OUTPUT_ENABLE 0x%02x\n",sdr_compatible_str, reg);
reg = ad9361_get_tx_atten(priv->ad9361_phy, ((priv->runtime_tx_ant_cfg==1 || priv->runtime_tx_ant_cfg==3)?1:2));
if (reg == (AD9361_RADIO_ON_TX_ATT+priv->rf_reg_val[RF_TX_REG_IDX_ATT])) {
priv->rfkill_off = 1;// 0 off, 1 on
printk("%s openwifi_dev_probe: rfkill radio on\n",sdr_compatible_str);
} else
printk("%s openwifi_dev_probe: WARNING rfkill radio on failed. tx att read %d require %d\n",sdr_compatible_str, reg, AD9361_RADIO_ON_TX_ATT+priv->rf_reg_val[RF_TX_REG_IDX_ATT]);
priv->drv_xpu_reg_val[DRV_XPU_REG_IDX_GIT_REV] = GIT_REV;
// //set ad9361 in certain mode
#if 0
err = ad9361_set_trx_clock_chain_freq(priv->ad9361_phy,priv->rf_bw);
printk("%s openwifi_dev_probe: ad9361_set_trx_clock_chain_freq %dHz err %d\n",sdr_compatible_str, priv->rf_bw,err);
err = ad9361_update_rf_bandwidth(priv->ad9361_phy,priv->rf_bw,priv->rf_bw);
printk("%s openwifi_dev_probe: ad9361_update_rf_bandwidth %dHz err %d\n",sdr_compatible_str, priv->rf_bw,err);
rx_intf_api->hw_init(priv->rx_intf_cfg,8,8);
tx_intf_api->hw_init(priv->tx_intf_cfg,8,8,priv->fpga_type);
openofdm_tx_api->hw_init(priv->openofdm_tx_cfg);
openofdm_rx_api->hw_init(priv->openofdm_rx_cfg);
printk("%s openwifi_dev_probe: rx_intf_cfg %d openofdm_rx_cfg %d tx_intf_cfg %d openofdm_tx_cfg %d\n",sdr_compatible_str, priv->rx_intf_cfg, priv->openofdm_rx_cfg, priv->tx_intf_cfg, priv->openofdm_tx_cfg);
printk("%s openwifi_dev_probe: rx_freq_offset_to_lo_MHz %d tx_freq_offset_to_lo_MHz %d\n",sdr_compatible_str, priv->rx_freq_offset_to_lo_MHz, priv->tx_freq_offset_to_lo_MHz);
#endif
dev->max_rates = 1; //maximum number of alternate rate retry stages the hw can handle.
SET_IEEE80211_DEV(dev, &pdev->dev);
platform_set_drvdata(pdev, dev);
BUILD_BUG_ON(sizeof(priv->rates_2GHz) != sizeof(openwifi_2GHz_rates));
BUILD_BUG_ON(sizeof(priv->rates_5GHz) != sizeof(openwifi_5GHz_rates));
BUILD_BUG_ON(sizeof(priv->channels_2GHz) != sizeof(openwifi_2GHz_channels));
BUILD_BUG_ON(sizeof(priv->channels_5GHz) != sizeof(openwifi_5GHz_channels));
memcpy(priv->rates_2GHz, openwifi_2GHz_rates, sizeof(openwifi_2GHz_rates));
memcpy(priv->rates_5GHz, openwifi_5GHz_rates, sizeof(openwifi_5GHz_rates));
memcpy(priv->channels_2GHz, openwifi_2GHz_channels, sizeof(openwifi_2GHz_channels));
memcpy(priv->channels_5GHz, openwifi_5GHz_channels, sizeof(openwifi_5GHz_channels));
priv->band = BAND_5_8GHZ; //this can be changed by band _rf_set_channel() (2.4GHz ERP(OFDM)) (5GHz OFDM)
priv->channel = 44; //currently useless. this can be changed by band _rf_set_channel()
priv->use_short_slot = false; //this can be changed by openwifi_bss_info_changed: BSS_CHANGED_ERP_SLOT
priv->ampdu_reference = 0;
priv->band_2GHz.band = NL80211_BAND_2GHZ;
priv->band_2GHz.channels = priv->channels_2GHz;
priv->band_2GHz.n_channels = ARRAY_SIZE(priv->channels_2GHz);
priv->band_2GHz.bitrates = priv->rates_2GHz;
priv->band_2GHz.n_bitrates = ARRAY_SIZE(priv->rates_2GHz);
priv->band_2GHz.ht_cap.ht_supported = true;
// priv->band_2GHz.ht_cap.cap = IEEE80211_HT_CAP_SGI_20; //SGI -- short GI seems bring unnecessary stability issue
if (AGGR_ENABLE) {
priv->band_2GHz.ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_8K;
priv->band_2GHz.ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_2;
}
memset(&priv->band_2GHz.ht_cap.mcs, 0, sizeof(priv->band_2GHz.ht_cap.mcs));
priv->band_2GHz.ht_cap.mcs.rx_mask[0] = 0xff;
priv->band_2GHz.ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
dev->wiphy->bands[NL80211_BAND_2GHZ] = &(priv->band_2GHz);
priv->band_5GHz.band = NL80211_BAND_5GHZ;
priv->band_5GHz.channels = priv->channels_5GHz;
priv->band_5GHz.n_channels = ARRAY_SIZE(priv->channels_5GHz);
priv->band_5GHz.bitrates = priv->rates_5GHz;
priv->band_5GHz.n_bitrates = ARRAY_SIZE(priv->rates_5GHz);
priv->band_5GHz.ht_cap.ht_supported = true;
// priv->band_5GHz.ht_cap.cap = IEEE80211_HT_CAP_SGI_20; //SGI -- short GI seems bring unnecessary stability issue
if (AGGR_ENABLE) {
priv->band_5GHz.ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_8K;
priv->band_5GHz.ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_2;
}
memset(&priv->band_5GHz.ht_cap.mcs, 0, sizeof(priv->band_5GHz.ht_cap.mcs));
priv->band_5GHz.ht_cap.mcs.rx_mask[0] = 0xff;
priv->band_5GHz.ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
dev->wiphy->bands[NL80211_BAND_5GHZ] = &(priv->band_5GHz);
printk("%s openwifi_dev_probe: band_2GHz.n_channels %d n_bitrates %d band_5GHz.n_channels %d n_bitrates %d\n",sdr_compatible_str,
priv->band_2GHz.n_channels,priv->band_2GHz.n_bitrates,priv->band_5GHz.n_channels,priv->band_5GHz.n_bitrates);
// ieee80211_hw_set(dev, HOST_BROADCAST_PS_BUFFERING); // remove this because we don't want: mac80211.h: host buffers frame for PS and we fetch them via ieee80211_get_buffered_bc()
ieee80211_hw_set(dev, RX_INCLUDES_FCS);
ieee80211_hw_set(dev, BEACON_TX_STATUS);//mac80211.h: The device/driver provides TX status for sent beacons.
ieee80211_hw_set(dev, REPORTS_TX_ACK_STATUS);//mac80211.h: Hardware can provide ack status reports of Tx frames to the stack
// * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device
// * autonomously manages the PS status of connected stations. When
// * this flag is set mac80211 will not trigger PS mode for connected
// * stations based on the PM bit of incoming frames.
// * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure
// * the PS mode of connected stations.
ieee80211_hw_set(dev, AP_LINK_PS);
if (AGGR_ENABLE) {
ieee80211_hw_set(dev, AMPDU_AGGREGATION);
}
dev->extra_tx_headroom = LEN_MPDU_DELIM;
dev->vif_data_size = sizeof(struct openwifi_vif);
dev->wiphy->interface_modes =
BIT(NL80211_IFTYPE_MONITOR)|
BIT(NL80211_IFTYPE_P2P_GO) |
BIT(NL80211_IFTYPE_P2P_CLIENT) |
BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC) |
BIT(NL80211_IFTYPE_MESH_POINT) |
BIT(NL80211_IFTYPE_OCB);
dev->wiphy->iface_combinations = &openwifi_if_comb;
dev->wiphy->n_iface_combinations = 1;
dev->wiphy->available_antennas_tx = NUM_TX_ANT_MASK;
dev->wiphy->available_antennas_rx = NUM_RX_ANT_MASK;
dev->wiphy->regulatory_flags = (REGULATORY_STRICT_REG|REGULATORY_CUSTOM_REG); // use our own config within strict regulation
//dev->wiphy->regulatory_flags = REGULATORY_CUSTOM_REG; // use our own config
wiphy_apply_custom_regulatory(dev->wiphy, &sdr_regd);
chip_name = "ZYNQ";
/* we declare to MAC80211 all the queues except for beacon queue
* that will be eventually handled by DRV.
* TX rings are arranged in such a way that lower is the IDX,
* higher is the priority, in order to achieve direct mapping
* with mac80211, however the beacon queue is an exception and it
* is mapped on the highst tx ring IDX.
*/
dev->queues = MAX_NUM_HW_QUEUE;
ieee80211_hw_set(dev, SIGNAL_DBM);
wiphy_ext_feature_set(dev->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
priv->rf = &ad9361_rf_ops;
memset(priv->dest_mac_addr_queue_map,0,sizeof(priv->dest_mac_addr_queue_map));
priv->slice_idx = 0xFFFFFFFF;
sg_init_table(&(priv->tx_sg), 1);
get_random_bytes(&rand_val, sizeof(rand_val));
rand_val%=250;
priv->mac_addr[0]=0x66; priv->mac_addr[1]=0x55; priv->mac_addr[2]=0x44; priv->mac_addr[3]=0x33; priv->mac_addr[4]=0x22;
priv->mac_addr[5]=rand_val+1;
//priv->mac_addr[5]=0x11;
if (!is_valid_ether_addr(priv->mac_addr)) {
printk(KERN_WARNING "%s openwifi_dev_probe: WARNING Invalid hwaddr! Using randomly generated MAC addr\n",sdr_compatible_str);
eth_random_addr(priv->mac_addr);
}
printk("%s openwifi_dev_probe: mac_addr %02x:%02x:%02x:%02x:%02x:%02x\n",sdr_compatible_str,priv->mac_addr[0],priv->mac_addr[1],priv->mac_addr[2],priv->mac_addr[3],priv->mac_addr[4],priv->mac_addr[5]);
SET_IEEE80211_PERM_ADDR(dev, priv->mac_addr);
spin_lock_init(&priv->lock);
err = ieee80211_register_hw(dev);
if (err) {
pr_err(KERN_ERR "%s openwifi_dev_probe: WARNING Cannot register device\n",sdr_compatible_str);
err = -EIO;
goto err_free_dev;
} else {
printk("%s openwifi_dev_probe: ieee80211_register_hw %d\n",sdr_compatible_str, err);
}
// create sysfs for arbitrary iq setting
sysfs_bin_attr_init(&priv->bin_iq);
priv->bin_iq.attr.name = "tx_intf_iq_data";
priv->bin_iq.attr.mode = S_IWUSR | S_IRUGO;
priv->bin_iq.write = openwifi_tx_intf_bin_iq_write;
priv->bin_iq.read = openwifi_tx_intf_bin_iq_read;
priv->bin_iq.size = 4096;
err = sysfs_create_bin_file(&pdev->dev.kobj, &priv->bin_iq);
printk("%s openwifi_dev_probe: sysfs_create_bin_file %d\n",sdr_compatible_str, err);
if (err < 0)
goto err_free_dev;
priv->tx_intf_arbitrary_iq_num = 0;
// priv->tx_intf_arbitrary_iq[0] = 1;
// priv->tx_intf_arbitrary_iq[1] = 2;
err = sysfs_create_group(&pdev->dev.kobj, &tx_intf_attribute_group);
printk("%s openwifi_dev_probe: sysfs_create_group tx_intf_attribute_group %d\n",sdr_compatible_str, err);
if (err < 0)
goto err_free_dev;
priv->tx_intf_iq_ctl = 0;
// create sysfs for stat
err = sysfs_create_group(&pdev->dev.kobj, &stat_attribute_group);
printk("%s openwifi_dev_probe: sysfs_create_group stat_attribute_group %d\n",sdr_compatible_str, err);
if (err < 0)
goto err_free_dev;
priv->stat.stat_enable = 0; // by default disable
for (i=0; i<MAX_NUM_SW_QUEUE; i++) {
priv->stat.tx_prio_num[i] = 0;
priv->stat.tx_prio_interrupt_num[i] = 0;
priv->stat.tx_prio_stop0_fake_num[i] = 0;
priv->stat.tx_prio_stop0_real_num[i] = 0;
priv->stat.tx_prio_stop1_num[i] = 0;
priv->stat.tx_prio_wakeup_num[i] = 0;
}
for (i=0; i<MAX_NUM_HW_QUEUE; i++) {
priv->stat.tx_queue_num[i] = 0;
priv->stat.tx_queue_interrupt_num[i] = 0;
priv->stat.tx_queue_stop0_fake_num[i] = 0;
priv->stat.tx_queue_stop0_real_num[i] = 0;
priv->stat.tx_queue_stop1_num[i] = 0;
priv->stat.tx_queue_wakeup_num[i] = 0;
}
priv->stat.tx_data_pkt_need_ack_num_total = 0;
priv->stat.tx_data_pkt_need_ack_num_total_fail = 0;
for (i=0; i<6; i++) {
priv->stat.tx_data_pkt_need_ack_num_retx[i] = 0;
priv->stat.tx_data_pkt_need_ack_num_retx_fail[i] = 0;
}
priv->stat.tx_data_pkt_mcs_realtime = 0;
priv->stat.tx_data_pkt_fail_mcs_realtime = 0;
priv->stat.tx_mgmt_pkt_need_ack_num_total = 0;
priv->stat.tx_mgmt_pkt_need_ack_num_total_fail = 0;
for (i=0; i<3; i++) {
priv->stat.tx_mgmt_pkt_need_ack_num_retx[i] = 0;
priv->stat.tx_mgmt_pkt_need_ack_num_retx_fail[i] = 0;
}
priv->stat.tx_mgmt_pkt_mcs_realtime = 0;
priv->stat.tx_mgmt_pkt_fail_mcs_realtime = 0;
priv->stat.rx_monitor_all = 0;
priv->stat.rx_target_sender_mac_addr = 0;
priv->stat.rx_data_ok_agc_gain_value_realtime = 0;
priv->stat.rx_data_fail_agc_gain_value_realtime = 0;
priv->stat.rx_mgmt_ok_agc_gain_value_realtime = 0;
priv->stat.rx_mgmt_fail_agc_gain_value_realtime = 0;
priv->stat.rx_ack_ok_agc_gain_value_realtime = 0;
priv->stat.rx_monitor_all = 0;
priv->stat.rx_data_pkt_num_total = 0;
priv->stat.rx_data_pkt_num_fail = 0;
priv->stat.rx_mgmt_pkt_num_total = 0;
priv->stat.rx_mgmt_pkt_num_fail = 0;
priv->stat.rx_ack_pkt_num_total = 0;
priv->stat.rx_ack_pkt_num_fail = 0;
priv->stat.rx_data_pkt_mcs_realtime = 0;
priv->stat.rx_data_pkt_fail_mcs_realtime = 0;
priv->stat.rx_mgmt_pkt_mcs_realtime = 0;
priv->stat.rx_mgmt_pkt_fail_mcs_realtime = 0;
priv->stat.rx_ack_pkt_mcs_realtime = 0;
priv->stat.restrict_freq_mhz = 0;
priv->stat.csma_cfg0 = 0;
priv->stat.cw_max_min_cfg = 0;
priv->stat.dbg_ch0 = 0;
priv->stat.dbg_ch1 = 0;
priv->stat.dbg_ch2 = 0;
// // //--------------------hook leds (not complete yet)--------------------------------
// tmp_dev = bus_find_device( &platform_bus_type, NULL, "leds", custom_match_platform_dev ); //leds is the name in devicetree, not "compatible" field
// if (!tmp_dev) {
// printk(KERN_ERR "%s bus_find_device platform_bus_type leds-gpio failed\n",sdr_compatible_str);
// err = -ENOMEM;
// goto err_free_dev;
// }
// tmp_pdev = to_platform_device(tmp_dev);
// if (!tmp_pdev) {
// printk(KERN_ERR "%s to_platform_device failed for leds-gpio\n",sdr_compatible_str);
// err = -ENOMEM;
// goto err_free_dev;
// }
// tmp_led_priv = platform_get_drvdata(tmp_pdev);
// if (!tmp_led_priv) {
// printk(KERN_ERR "%s platform_get_drvdata failed for leds-gpio\n",sdr_compatible_str);
// err = -ENOMEM;
// goto err_free_dev;
// }
// printk("%s openwifi_dev_probe: leds-gpio detect %d leds!\n",sdr_compatible_str, tmp_led_priv->num_leds);
// if (tmp_led_priv->num_leds!=4){
// printk(KERN_ERR "%s WARNING we expect 4 leds, but actual %d leds\n",sdr_compatible_str,tmp_led_priv->num_leds);
// err = -ENOMEM;
// goto err_free_dev;
// }
// gpiod_set_value(tmp_led_priv->leds[0].gpiod, 1);//light it
// gpiod_set_value(tmp_led_priv->leds[3].gpiod, 0);//black it
// priv->num_led = tmp_led_priv->num_leds;
// priv->led[0] = &(tmp_led_priv->leds[0].cdev);
// priv->led[1] = &(tmp_led_priv->leds[1].cdev);
// priv->led[2] = &(tmp_led_priv->leds[2].cdev);
// priv->led[3] = &(tmp_led_priv->leds[3].cdev);
// snprintf(priv->led_name[0], OPENWIFI_LED_MAX_NAME_LEN, "openwifi-%s::radio", wiphy_name(dev->wiphy));
// snprintf(priv->led_name[1], OPENWIFI_LED_MAX_NAME_LEN, "openwifi-%s::assoc", wiphy_name(dev->wiphy));
// snprintf(priv->led_name[2], OPENWIFI_LED_MAX_NAME_LEN, "openwifi-%s::tx", wiphy_name(dev->wiphy));
// snprintf(priv->led_name[3], OPENWIFI_LED_MAX_NAME_LEN, "openwifi-%s::rx", wiphy_name(dev->wiphy));
wiphy_info(dev->wiphy, "hwaddr %pm, %s + %s\n",
priv->mac_addr, chip_name, priv->rf->name);
openwifi_rfkill_init(dev);
return 0;
err_free_dev:
ieee80211_free_hw(dev);
return err;
}
static int openwifi_dev_remove(struct platform_device *pdev)
{
struct ieee80211_hw *dev = platform_get_drvdata(pdev);
struct openwifi_priv *priv = dev->priv;
if (!dev) {
pr_info("%s openwifi_dev_remove: dev %p\n", sdr_compatible_str, (void*)dev);
return(-1);
}
sysfs_remove_bin_file(&pdev->dev.kobj, &priv->bin_iq);
sysfs_remove_group(&pdev->dev.kobj, &tx_intf_attribute_group);
sysfs_remove_group(&pdev->dev.kobj, &stat_attribute_group);
openwifi_rfkill_exit(dev);
ieee80211_unregister_hw(dev);
ieee80211_free_hw(dev);
return(0);
}
static struct platform_driver openwifi_dev_driver = {
.driver = {
.name = "sdr,sdr",
.owner = THIS_MODULE,
.of_match_table = openwifi_dev_of_ids,
},
.probe = openwifi_dev_probe,
.remove = openwifi_dev_remove,
};
module_platform_driver(openwifi_dev_driver);
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