#include <linux/module.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include "main.h"
#include "debug.h"
#include "mac.h"
#include "reg.h"
#include "tx.h"
#include "rx.h"
#include "fw.h"
#include "ps.h"
#include "usb.h"
static bool rtw_switch_usb_mode = true;
module_param_named(switch_usb_mode, rtw_switch_usb_mode, bool, 0644);
MODULE_PARM_DESC(switch_usb_mode,
"Set to N to disable switching to USB 3 mode to avoid potential interference in the 2.4 GHz band (default: Y)");
#define RTW_USB_MAX_RXQ_LEN 512
struct rtw_usb_txcb {
struct rtw_dev *rtwdev;
struct sk_buff_head tx_ack_queue;
};
static void rtw_usb_fill_tx_checksum(struct rtw_usb *rtwusb,
struct sk_buff *skb, int agg_num)
{
struct rtw_tx_desc *tx_desc = (struct rtw_tx_desc *)skb->data;
struct rtw_dev *rtwdev = rtwusb->rtwdev;
struct rtw_tx_pkt_info pkt_info;
le32p_replace_bits(&tx_desc->w7, agg_num, RTW_TX_DESC_W7_DMA_TXAGG_NUM);
pkt_info.pkt_offset = le32_get_bits(tx_desc->w1, RTW_TX_DESC_W1_PKT_OFFSET);
rtw_tx_fill_txdesc_checksum(rtwdev, &pkt_info, skb->data);
}
static void rtw_usb_reg_sec(struct rtw_dev *rtwdev, u32 addr, __le32 *data)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
struct usb_device *udev = rtwusb->udev;
bool reg_on_section = false;
u16 t_reg = 0x4e0;
u8 t_len = 1;
int status;
if (addr <= 0xff || (addr >= 0x1000 && addr <= 0x10ff))
reg_on_section = true;
if (!reg_on_section)
return;
status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
RTW_USB_CMD_REQ, RTW_USB_CMD_WRITE,
t_reg, 0, data, t_len, 500);
if (status != t_len && status != -ENODEV)
rtw_err(rtwdev, "%s: reg 0x%x, usb write %u fail, status: %d\n",
__func__, t_reg, t_len, status);
}
static u32 rtw_usb_read(struct rtw_dev *rtwdev, u32 addr, u16 len)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
struct usb_device *udev = rtwusb->udev;
__le32 *data;
unsigned long flags;
int idx, ret;
static int count;
spin_lock_irqsave(&rtwusb->usb_lock, flags);
idx = rtwusb->usb_data_index;
rtwusb->usb_data_index = (idx + 1) & (RTW_USB_MAX_RXTX_COUNT - 1);
spin_unlock_irqrestore(&rtwusb->usb_lock, flags);
data = &rtwusb->usb_data[idx];
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
RTW_USB_CMD_REQ, RTW_USB_CMD_READ, addr,
RTW_USB_VENQT_CMD_IDX, data, len, 1000);
if (ret < 0 && ret != -ENODEV && count++ < 4)
rtw_err(rtwdev, "read register 0x%x failed with %d\n",
addr, ret);
if (rtwdev->chip->id == RTW_CHIP_TYPE_8822C ||
rtwdev->chip->id == RTW_CHIP_TYPE_8822B ||
rtwdev->chip->id == RTW_CHIP_TYPE_8821C)
rtw_usb_reg_sec(rtwdev, addr, data);
return le32_to_cpu(*data);
}
static u8 rtw_usb_read8(struct rtw_dev *rtwdev, u32 addr)
{
return (u8)rtw_usb_read(rtwdev, addr, 1);
}
static u16 rtw_usb_read16(struct rtw_dev *rtwdev, u32 addr)
{
return (u16)rtw_usb_read(rtwdev, addr, 2);
}
static u32 rtw_usb_read32(struct rtw_dev *rtwdev, u32 addr)
{
return (u32)rtw_usb_read(rtwdev, addr, 4);
}
static void rtw_usb_write(struct rtw_dev *rtwdev, u32 addr, u32 val, int len)
{
struct rtw_usb *rtwusb = (struct rtw_usb *)rtwdev->priv;
struct usb_device *udev = rtwusb->udev;
unsigned long flags;
__le32 *data;
int idx, ret;
static int count;
spin_lock_irqsave(&rtwusb->usb_lock, flags);
idx = rtwusb->usb_data_index;
rtwusb->usb_data_index = (idx + 1) & (RTW_USB_MAX_RXTX_COUNT - 1);
spin_unlock_irqrestore(&rtwusb->usb_lock, flags);
data = &rtwusb->usb_data[idx];
*data = cpu_to_le32(val);
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
RTW_USB_CMD_REQ, RTW_USB_CMD_WRITE,
addr, 0, data, len, 500);
if (ret < 0 && ret != -ENODEV && count++ < 4)
rtw_err(rtwdev, "write register 0x%x failed with %d\n",
addr, ret);
if (rtwdev->chip->id == RTW_CHIP_TYPE_8822C ||
rtwdev->chip->id == RTW_CHIP_TYPE_8822B ||
rtwdev->chip->id == RTW_CHIP_TYPE_8821C)
rtw_usb_reg_sec(rtwdev, addr, data);
}
static void rtw_usb_write8(struct rtw_dev *rtwdev, u32 addr, u8 val)
{
rtw_usb_write(rtwdev, addr, val, 1);
}
static void rtw_usb_write16(struct rtw_dev *rtwdev, u32 addr, u16 val)
{
rtw_usb_write(rtwdev, addr, val, 2);
}
static void rtw_usb_write32(struct rtw_dev *rtwdev, u32 addr, u32 val)
{
rtw_usb_write(rtwdev, addr, val, 4);
}
static void rtw_usb_write_firmware_page(struct rtw_dev *rtwdev, u32 page,
const u8 *data, u32 size)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
struct usb_device *udev = rtwusb->udev;
u32 addr = FW_START_ADDR_LEGACY;
u8 *data_dup, *buf;
u32 n, block_size;
int ret;
switch (rtwdev->chip->id) {
case RTW_CHIP_TYPE_8723D:
block_size = 254;
break;
default:
block_size = 196;
break;
}
data_dup = kmemdup(data, size, GFP_KERNEL);
if (!data_dup)
return;
buf = data_dup;
rtw_write32_mask(rtwdev, REG_MCUFW_CTRL, BIT_ROM_PGE, page);
while (size > 0) {
if (size >= block_size)
n = block_size;
else if (size >= 8)
n = 8;
else
n = 1;
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
RTW_USB_CMD_REQ, RTW_USB_CMD_WRITE,
addr, 0, buf, n, 500);
if (ret != n) {
if (ret != -ENODEV)
rtw_err(rtwdev,
"write 0x%x len %d failed: %d\n",
addr, n, ret);
break;
}
addr += n;
buf += n;
size -= n;
}
kfree(data_dup);
}
static int dma_mapping_to_ep(enum rtw_dma_mapping dma_mapping)
{
switch (dma_mapping) {
case RTW_DMA_MAPPING_HIGH:
return 0;
case RTW_DMA_MAPPING_NORMAL:
return 1;
case RTW_DMA_MAPPING_LOW:
return 2;
case RTW_DMA_MAPPING_EXTRA:
return 3;
default:
return -EINVAL;
}
}
static int rtw_usb_parse(struct rtw_dev *rtwdev,
struct usb_interface *interface)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
struct usb_host_interface *host_interface = &interface->altsetting[0];
struct usb_interface_descriptor *interface_desc = &host_interface->desc;
struct usb_endpoint_descriptor *endpoint;
int num_out_pipes = 0;
int i;
u8 num;
const struct rtw_chip_info *chip = rtwdev->chip;
const struct rtw_rqpn *rqpn;
for (i = 0; i < interface_desc->bNumEndpoints; i++) {
endpoint = &host_interface->endpoint[i].desc;
num = usb_endpoint_num(endpoint);
if (usb_endpoint_dir_in(endpoint) &&
usb_endpoint_xfer_bulk(endpoint)) {
if (rtwusb->pipe_in) {
rtw_err(rtwdev, "IN pipes overflow\n");
return -EINVAL;
}
rtwusb->pipe_in = num;
}
if (usb_endpoint_dir_in(endpoint) &&
usb_endpoint_xfer_int(endpoint)) {
if (rtwusb->pipe_interrupt) {
rtw_err(rtwdev, "INT pipes overflow\n");
return -EINVAL;
}
rtwusb->pipe_interrupt = num;
}
if (usb_endpoint_dir_out(endpoint) &&
usb_endpoint_xfer_bulk(endpoint)) {
if (num_out_pipes >= ARRAY_SIZE(rtwusb->out_ep)) {
rtw_err(rtwdev, "OUT pipes overflow\n");
return -EINVAL;
}
rtwusb->out_ep[num_out_pipes++] = num;
}
}
rtwdev->hci.bulkout_num = num_out_pipes;
if (num_out_pipes < 1 || num_out_pipes > 4) {
rtw_err(rtwdev, "invalid number of endpoints %d\n", num_out_pipes);
return -EINVAL;
}
rqpn = &chip->rqpn_table[num_out_pipes];
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID0] = dma_mapping_to_ep(rqpn->dma_map_be);
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID1] = dma_mapping_to_ep(rqpn->dma_map_bk);
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID2] = dma_mapping_to_ep(rqpn->dma_map_bk);
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID3] = dma_mapping_to_ep(rqpn->dma_map_be);
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID4] = dma_mapping_to_ep(rqpn->dma_map_vi);
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID5] = dma_mapping_to_ep(rqpn->dma_map_vi);
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID6] = dma_mapping_to_ep(rqpn->dma_map_vo);
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID7] = dma_mapping_to_ep(rqpn->dma_map_vo);
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID8] = -EINVAL;
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID9] = -EINVAL;
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID10] = -EINVAL;
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID11] = -EINVAL;
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID12] = -EINVAL;
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID13] = -EINVAL;
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID14] = -EINVAL;
rtwusb->qsel_to_ep[TX_DESC_QSEL_TID15] = -EINVAL;
rtwusb->qsel_to_ep[TX_DESC_QSEL_BEACON] = dma_mapping_to_ep(rqpn->dma_map_hi);
rtwusb->qsel_to_ep[TX_DESC_QSEL_HIGH] = dma_mapping_to_ep(rqpn->dma_map_hi);
rtwusb->qsel_to_ep[TX_DESC_QSEL_MGMT] = dma_mapping_to_ep(rqpn->dma_map_mg);
rtwusb->qsel_to_ep[TX_DESC_QSEL_H2C] = dma_mapping_to_ep(rqpn->dma_map_hi);
return 0;
}
static void rtw_usb_write_port_tx_complete(struct urb *urb)
{
struct rtw_usb_txcb *txcb = urb->context;
struct rtw_dev *rtwdev = txcb->rtwdev;
struct ieee80211_hw *hw = rtwdev->hw;
while (true) {
struct sk_buff *skb = skb_dequeue(&txcb->tx_ack_queue);
struct ieee80211_tx_info *info;
struct rtw_usb_tx_data *tx_data;
if (!skb)
break;
info = IEEE80211_SKB_CB(skb);
tx_data = rtw_usb_get_tx_data(skb);
skb_pull(skb, rtwdev->chip->tx_pkt_desc_sz);
if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) {
rtw_tx_report_enqueue(rtwdev, skb, tx_data->sn);
continue;
}
ieee80211_tx_info_clear_status(info);
if (info->flags & IEEE80211_TX_CTL_NO_ACK)
info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
else
info->flags |= IEEE80211_TX_STAT_ACK;
ieee80211_tx_status_irqsafe(hw, skb);
}
kfree(txcb);
}
static int qsel_to_ep(struct rtw_usb *rtwusb, unsigned int qsel)
{
if (qsel >= ARRAY_SIZE(rtwusb->qsel_to_ep))
return -EINVAL;
return rtwusb->qsel_to_ep[qsel];
}
static int rtw_usb_write_port(struct rtw_dev *rtwdev, u8 qsel, struct sk_buff *skb,
usb_complete_t cb, void *context)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
struct usb_device *usbd = rtwusb->udev;
struct urb *urb;
unsigned int pipe;
int ret;
int ep = qsel_to_ep(rtwusb, qsel);
if (ep < 0)
return ep;
pipe = usb_sndbulkpipe(usbd, rtwusb->out_ep[ep]);
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb)
return -ENOMEM;
usb_fill_bulk_urb(urb, usbd, pipe, skb->data, skb->len, cb, context);
urb->transfer_flags |= URB_ZERO_PACKET;
ret = usb_submit_urb(urb, GFP_ATOMIC);
usb_free_urb(urb);
return ret;
}
static bool rtw_usb_tx_agg_skb(struct rtw_usb *rtwusb, struct sk_buff_head *list)
{
struct rtw_dev *rtwdev = rtwusb->rtwdev;
struct rtw_tx_desc *tx_desc;
struct rtw_usb_txcb *txcb;
struct sk_buff *skb_head;
struct sk_buff *skb_iter;
int agg_num = 0;
unsigned int align_next = 0;
u8 qsel;
if (skb_queue_empty(list))
return false;
txcb = kmalloc_obj(*txcb, GFP_ATOMIC);
if (!txcb)
return false;
txcb->rtwdev = rtwdev;
skb_queue_head_init(&txcb->tx_ack_queue);
skb_iter = skb_dequeue(list);
if (skb_queue_empty(list)) {
skb_head = skb_iter;
goto queue;
}
skb_head = dev_alloc_skb(RTW_USB_MAX_XMITBUF_SZ);
if (!skb_head) {
skb_head = skb_iter;
goto queue;
}
while (skb_iter) {
unsigned long flags;
skb_put(skb_head, align_next);
skb_put_data(skb_head, skb_iter->data, skb_iter->len);
align_next = ALIGN(skb_iter->len, 8) - skb_iter->len;
agg_num++;
skb_queue_tail(&txcb->tx_ack_queue, skb_iter);
spin_lock_irqsave(&list->lock, flags);
skb_iter = skb_peek(list);
if (skb_iter &&
skb_iter->len + skb_head->len <= RTW_USB_MAX_XMITBUF_SZ &&
agg_num < rtwdev->chip->usb_tx_agg_desc_num)
__skb_unlink(skb_iter, list);
else
skb_iter = NULL;
spin_unlock_irqrestore(&list->lock, flags);
}
if (agg_num > 1)
rtw_usb_fill_tx_checksum(rtwusb, skb_head, agg_num);
queue:
skb_queue_tail(&txcb->tx_ack_queue, skb_head);
tx_desc = (struct rtw_tx_desc *)skb_head->data;
qsel = le32_get_bits(tx_desc->w1, RTW_TX_DESC_W1_QSEL);
rtw_usb_write_port(rtwdev, qsel, skb_head, rtw_usb_write_port_tx_complete, txcb);
return true;
}
static void rtw_usb_tx_handler(struct work_struct *work)
{
struct rtw_usb *rtwusb = container_of(work, struct rtw_usb, tx_work);
int i, limit;
for (i = ARRAY_SIZE(rtwusb->tx_queue) - 1; i >= 0; i--) {
for (limit = 0; limit < 200; limit++) {
struct sk_buff_head *list = &rtwusb->tx_queue[i];
if (!rtw_usb_tx_agg_skb(rtwusb, list))
break;
}
}
}
static void rtw_usb_tx_queue_purge(struct rtw_usb *rtwusb)
{
struct rtw_dev *rtwdev = rtwusb->rtwdev;
int i;
for (i = 0; i < ARRAY_SIZE(rtwusb->tx_queue); i++)
ieee80211_purge_tx_queue(rtwdev->hw, &rtwusb->tx_queue[i]);
}
static void rtw_usb_write_port_complete(struct urb *urb)
{
struct sk_buff *skb = urb->context;
dev_kfree_skb_any(skb);
}
static int rtw_usb_write_data(struct rtw_dev *rtwdev,
struct rtw_tx_pkt_info *pkt_info,
u8 *buf)
{
const struct rtw_chip_info *chip = rtwdev->chip;
struct sk_buff *skb;
unsigned int size;
u8 qsel;
int ret = 0;
size = pkt_info->tx_pkt_size;
qsel = pkt_info->qsel;
skb = dev_alloc_skb(chip->tx_pkt_desc_sz + size);
if (unlikely(!skb))
return -ENOMEM;
skb_reserve(skb, chip->tx_pkt_desc_sz);
skb_put_data(skb, buf, size);
skb_push(skb, chip->tx_pkt_desc_sz);
memset(skb->data, 0, chip->tx_pkt_desc_sz);
rtw_tx_fill_tx_desc(rtwdev, pkt_info, skb);
rtw_tx_fill_txdesc_checksum(rtwdev, pkt_info, skb->data);
ret = rtw_usb_write_port(rtwdev, qsel, skb,
rtw_usb_write_port_complete, skb);
if (unlikely(ret))
rtw_err(rtwdev, "failed to do USB write, ret=%d\n", ret);
return ret;
}
static int rtw_usb_write_data_rsvd_page(struct rtw_dev *rtwdev, u8 *buf,
u32 size)
{
const struct rtw_chip_info *chip = rtwdev->chip;
struct rtw_tx_pkt_info pkt_info = {0};
pkt_info.tx_pkt_size = size;
pkt_info.qsel = TX_DESC_QSEL_BEACON;
pkt_info.offset = chip->tx_pkt_desc_sz;
pkt_info.ls = true;
return rtw_usb_write_data(rtwdev, &pkt_info, buf);
}
static int rtw_usb_write_data_h2c(struct rtw_dev *rtwdev, u8 *buf, u32 size)
{
struct rtw_tx_pkt_info pkt_info = {0};
pkt_info.tx_pkt_size = size;
pkt_info.qsel = TX_DESC_QSEL_H2C;
return rtw_usb_write_data(rtwdev, &pkt_info, buf);
}
static u8 rtw_usb_tx_queue_mapping_to_qsel(struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
__le16 fc = hdr->frame_control;
u8 qsel;
if (unlikely(ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)))
qsel = TX_DESC_QSEL_MGMT;
else if (is_broadcast_ether_addr(hdr->addr1) ||
is_multicast_ether_addr(hdr->addr1))
qsel = TX_DESC_QSEL_HIGH;
else if (skb_get_queue_mapping(skb) <= IEEE80211_AC_BK)
qsel = skb->priority;
else
qsel = TX_DESC_QSEL_BEACON;
return qsel;
}
static int rtw_usb_tx_write(struct rtw_dev *rtwdev,
struct rtw_tx_pkt_info *pkt_info,
struct sk_buff *skb)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
const struct rtw_chip_info *chip = rtwdev->chip;
struct rtw_usb_tx_data *tx_data;
u8 *pkt_desc;
int ep;
pkt_info->qsel = rtw_usb_tx_queue_mapping_to_qsel(skb);
pkt_desc = skb_push(skb, chip->tx_pkt_desc_sz);
memset(pkt_desc, 0, chip->tx_pkt_desc_sz);
ep = qsel_to_ep(rtwusb, pkt_info->qsel);
rtw_tx_fill_tx_desc(rtwdev, pkt_info, skb);
rtw_tx_fill_txdesc_checksum(rtwdev, pkt_info, skb->data);
tx_data = rtw_usb_get_tx_data(skb);
tx_data->sn = pkt_info->sn;
skb_queue_tail(&rtwusb->tx_queue[ep], skb);
return 0;
}
static void rtw_usb_tx_kick_off(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
queue_work(rtwusb->txwq, &rtwusb->tx_work);
}
static void rtw_usb_rx_handler(struct work_struct *work)
{
struct rtw_usb *rtwusb = container_of(work, struct rtw_usb, rx_work);
struct rtw_dev *rtwdev = rtwusb->rtwdev;
struct ieee80211_rx_status rx_status;
struct rtw_rx_pkt_stat pkt_stat;
struct sk_buff *rx_skb;
struct sk_buff *skb;
u32 pkt_desc_sz = rtwdev->chip->rx_pkt_desc_sz;
u32 max_skb_len = pkt_desc_sz + PHY_STATUS_SIZE * 8 +
IEEE80211_MAX_MPDU_LEN_VHT_11454;
u32 pkt_offset, next_pkt, skb_len;
u8 *rx_desc;
int limit;
for (limit = 0; limit < 200; limit++) {
rx_skb = skb_dequeue(&rtwusb->rx_queue);
if (!rx_skb)
break;
if (skb_queue_len(&rtwusb->rx_queue) >= RTW_USB_MAX_RXQ_LEN) {
dev_dbg_ratelimited(rtwdev->dev, "failed to get rx_queue, overflow\n");
dev_kfree_skb_any(rx_skb);
continue;
}
rx_desc = rx_skb->data;
do {
rtw_rx_query_rx_desc(rtwdev, rx_desc, &pkt_stat,
&rx_status);
pkt_offset = pkt_desc_sz + pkt_stat.drv_info_sz +
pkt_stat.shift;
skb_len = pkt_stat.pkt_len + pkt_offset;
if (skb_len > max_skb_len) {
rtw_dbg(rtwdev, RTW_DBG_USB,
"skipping too big packet: %u\n",
skb_len);
goto skip_packet;
}
skb = alloc_skb(skb_len, GFP_ATOMIC);
if (!skb) {
rtw_dbg(rtwdev, RTW_DBG_USB,
"failed to allocate RX skb of size %u\n",
skb_len);
goto skip_packet;
}
skb_put_data(skb, rx_desc, skb_len);
if (pkt_stat.is_c2h) {
rtw_fw_c2h_cmd_rx_irqsafe(rtwdev, pkt_offset, skb);
} else {
skb_pull(skb, pkt_offset);
rtw_update_rx_freq_for_invalid(rtwdev, skb,
&rx_status,
&pkt_stat);
rtw_rx_stats(rtwdev, pkt_stat.vif, skb);
memcpy(skb->cb, &rx_status, sizeof(rx_status));
ieee80211_rx_irqsafe(rtwdev->hw, skb);
}
skip_packet:
next_pkt = round_up(skb_len, 8);
rx_desc += next_pkt;
} while (rx_desc + pkt_desc_sz < rx_skb->data + rx_skb->len);
if (skb_queue_len(&rtwusb->rx_free_queue) >= RTW_USB_RX_SKB_NUM)
dev_kfree_skb_any(rx_skb);
else
skb_queue_tail(&rtwusb->rx_free_queue, rx_skb);
}
}
static void rtw_usb_read_port_complete(struct urb *urb);
static void rtw_usb_rx_resubmit(struct rtw_usb *rtwusb,
struct rx_usb_ctrl_block *rxcb,
gfp_t gfp)
{
struct rtw_dev *rtwdev = rtwusb->rtwdev;
struct sk_buff *rx_skb;
int error;
rx_skb = skb_dequeue(&rtwusb->rx_free_queue);
if (!rx_skb)
rx_skb = alloc_skb(RTW_USB_MAX_RECVBUF_SZ, gfp);
if (!rx_skb)
goto try_later;
skb_reset_tail_pointer(rx_skb);
rx_skb->len = 0;
rxcb->rx_skb = rx_skb;
usb_fill_bulk_urb(rxcb->rx_urb, rtwusb->udev,
usb_rcvbulkpipe(rtwusb->udev, rtwusb->pipe_in),
rxcb->rx_skb->data, RTW_USB_MAX_RECVBUF_SZ,
rtw_usb_read_port_complete, rxcb);
error = usb_submit_urb(rxcb->rx_urb, gfp);
if (error) {
skb_queue_tail(&rtwusb->rx_free_queue, rxcb->rx_skb);
if (error != -ENODEV)
rtw_err(rtwdev, "Err sending rx data urb %d\n",
error);
if (error == -ENOMEM)
goto try_later;
}
return;
try_later:
rxcb->rx_skb = NULL;
queue_work(rtwusb->rxwq, &rtwusb->rx_urb_work);
}
static void rtw_usb_rx_resubmit_work(struct work_struct *work)
{
struct rtw_usb *rtwusb = container_of(work, struct rtw_usb, rx_urb_work);
struct rx_usb_ctrl_block *rxcb;
int i;
for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
rxcb = &rtwusb->rx_cb[i];
if (!rxcb->rx_skb)
rtw_usb_rx_resubmit(rtwusb, rxcb, GFP_ATOMIC);
}
}
static void rtw_usb_read_port_complete(struct urb *urb)
{
struct rx_usb_ctrl_block *rxcb = urb->context;
struct rtw_dev *rtwdev = rxcb->rtwdev;
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
struct sk_buff *skb = rxcb->rx_skb;
if (urb->status == 0) {
if (urb->actual_length >= RTW_USB_MAX_RECVBUF_SZ ||
urb->actual_length < 24) {
rtw_err(rtwdev, "failed to get urb length:%d\n",
urb->actual_length);
skb_queue_tail(&rtwusb->rx_free_queue, skb);
} else {
skb_put(skb, urb->actual_length);
skb_queue_tail(&rtwusb->rx_queue, skb);
queue_work(rtwusb->rxwq, &rtwusb->rx_work);
}
rtw_usb_rx_resubmit(rtwusb, rxcb, GFP_ATOMIC);
} else {
skb_queue_tail(&rtwusb->rx_free_queue, skb);
switch (urb->status) {
case -EINVAL:
case -EPIPE:
case -ENODEV:
case -ESHUTDOWN:
case -ENOENT:
case -EPROTO:
case -EILSEQ:
case -ETIME:
case -ECOMM:
case -EOVERFLOW:
case -EINPROGRESS:
break;
default:
rtw_err(rtwdev, "status %d\n", urb->status);
break;
}
}
}
static void rtw_usb_cancel_rx_bufs(struct rtw_usb *rtwusb)
{
struct rx_usb_ctrl_block *rxcb;
int i;
for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
rxcb = &rtwusb->rx_cb[i];
usb_kill_urb(rxcb->rx_urb);
}
}
static void rtw_usb_free_rx_bufs(struct rtw_usb *rtwusb)
{
struct rx_usb_ctrl_block *rxcb;
int i;
for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
rxcb = &rtwusb->rx_cb[i];
usb_kill_urb(rxcb->rx_urb);
usb_free_urb(rxcb->rx_urb);
}
}
static int rtw_usb_alloc_rx_bufs(struct rtw_usb *rtwusb)
{
int i;
for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
struct rx_usb_ctrl_block *rxcb = &rtwusb->rx_cb[i];
rxcb->rtwdev = rtwusb->rtwdev;
rxcb->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!rxcb->rx_urb)
goto err;
}
return 0;
err:
rtw_usb_free_rx_bufs(rtwusb);
return -ENOMEM;
}
static int rtw_usb_setup(struct rtw_dev *rtwdev)
{
return 0;
}
static int rtw_usb_start(struct rtw_dev *rtwdev)
{
return 0;
}
static void rtw_usb_stop(struct rtw_dev *rtwdev)
{
}
static void rtw_usb_deep_ps(struct rtw_dev *rtwdev, bool enter)
{
}
static void rtw_usb_link_ps(struct rtw_dev *rtwdev, bool enter)
{
}
static void rtw_usb_init_burst_pkt_len(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
enum usb_device_speed speed = rtwusb->udev->speed;
u8 rxdma, burst_size;
rxdma = BIT_DMA_BURST_CNT | BIT_DMA_MODE;
if (speed == USB_SPEED_SUPER)
burst_size = BIT_DMA_BURST_SIZE_1024;
else if (speed == USB_SPEED_HIGH)
burst_size = BIT_DMA_BURST_SIZE_512;
else
burst_size = BIT_DMA_BURST_SIZE_64;
u8p_replace_bits(&rxdma, burst_size, BIT_DMA_BURST_SIZE);
rtw_write8(rtwdev, REG_RXDMA_MODE, rxdma);
rtw_write16_set(rtwdev, REG_TXDMA_OFFSET_CHK, BIT_DROP_DATA_EN);
}
static void rtw_usb_interface_cfg(struct rtw_dev *rtwdev)
{
rtw_usb_init_burst_pkt_len(rtwdev);
}
static void rtw_usb_dynamic_rx_agg_v1(struct rtw_dev *rtwdev, bool enable)
{
u8 size, timeout;
u16 val16;
rtw_write8_set(rtwdev, REG_TXDMA_PQ_MAP, BIT_RXDMA_AGG_EN);
rtw_write8_clr(rtwdev, REG_RXDMA_AGG_PG_TH + 3, BIT(7));
if (enable) {
size = 0x5;
timeout = 0x20;
} else {
size = 0x0;
timeout = 0x1;
}
val16 = u16_encode_bits(size, BIT_RXDMA_AGG_PG_TH) |
u16_encode_bits(timeout, BIT_DMA_AGG_TO_V1);
rtw_write16(rtwdev, REG_RXDMA_AGG_PG_TH, val16);
}
static void rtw_usb_dynamic_rx_agg_v2(struct rtw_dev *rtwdev, bool enable)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
u8 size, timeout;
u16 val16;
if (!enable) {
size = 0x0;
timeout = 0x1;
} else if (rtwusb->udev->speed == USB_SPEED_SUPER) {
size = 0x6;
timeout = 0x1a;
} else {
size = 0x5;
timeout = 0x20;
}
val16 = u16_encode_bits(size, BIT_RXDMA_AGG_PG_TH) |
u16_encode_bits(timeout, BIT_DMA_AGG_TO_V1);
rtw_write16(rtwdev, REG_RXDMA_AGG_PG_TH, val16);
rtw_write8_set(rtwdev, REG_TXDMA_PQ_MAP, BIT_RXDMA_AGG_EN);
}
static void rtw_usb_dynamic_rx_agg(struct rtw_dev *rtwdev, bool enable)
{
switch (rtwdev->chip->id) {
case RTW_CHIP_TYPE_8822C:
case RTW_CHIP_TYPE_8822B:
case RTW_CHIP_TYPE_8821C:
case RTW_CHIP_TYPE_8814A:
rtw_usb_dynamic_rx_agg_v1(rtwdev, enable);
break;
case RTW_CHIP_TYPE_8821A:
case RTW_CHIP_TYPE_8812A:
rtw_usb_dynamic_rx_agg_v2(rtwdev, enable);
break;
case RTW_CHIP_TYPE_8723D:
break;
case RTW_CHIP_TYPE_8703B:
break;
}
}
static const struct rtw_hci_ops rtw_usb_ops = {
.tx_write = rtw_usb_tx_write,
.tx_kick_off = rtw_usb_tx_kick_off,
.setup = rtw_usb_setup,
.start = rtw_usb_start,
.stop = rtw_usb_stop,
.deep_ps = rtw_usb_deep_ps,
.link_ps = rtw_usb_link_ps,
.interface_cfg = rtw_usb_interface_cfg,
.dynamic_rx_agg = rtw_usb_dynamic_rx_agg,
.write_firmware_page = rtw_usb_write_firmware_page,
.write8 = rtw_usb_write8,
.write16 = rtw_usb_write16,
.write32 = rtw_usb_write32,
.read8 = rtw_usb_read8,
.read16 = rtw_usb_read16,
.read32 = rtw_usb_read32,
.write_data_rsvd_page = rtw_usb_write_data_rsvd_page,
.write_data_h2c = rtw_usb_write_data_h2c,
};
static int rtw_usb_init_rx(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
struct sk_buff *rx_skb;
int i;
rtwusb->rxwq = alloc_workqueue("rtw88_usb: rx wq", WQ_BH | WQ_PERCPU,
0);
if (!rtwusb->rxwq) {
rtw_err(rtwdev, "failed to create RX work queue\n");
return -ENOMEM;
}
skb_queue_head_init(&rtwusb->rx_queue);
skb_queue_head_init(&rtwusb->rx_free_queue);
INIT_WORK(&rtwusb->rx_work, rtw_usb_rx_handler);
INIT_WORK(&rtwusb->rx_urb_work, rtw_usb_rx_resubmit_work);
for (i = 0; i < RTW_USB_RX_SKB_NUM; i++) {
rx_skb = alloc_skb(RTW_USB_MAX_RECVBUF_SZ, GFP_KERNEL);
if (rx_skb)
skb_queue_tail(&rtwusb->rx_free_queue, rx_skb);
}
return 0;
}
static void rtw_usb_setup_rx(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
int i;
for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
struct rx_usb_ctrl_block *rxcb = &rtwusb->rx_cb[i];
rtw_usb_rx_resubmit(rtwusb, rxcb, GFP_KERNEL);
}
}
static void rtw_usb_deinit_rx(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
skb_queue_purge(&rtwusb->rx_queue);
destroy_workqueue(rtwusb->rxwq);
skb_queue_purge(&rtwusb->rx_free_queue);
}
static int rtw_usb_init_tx(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
int i;
rtwusb->txwq = create_singlethread_workqueue("rtw88_usb: tx wq");
if (!rtwusb->txwq) {
rtw_err(rtwdev, "failed to create TX work queue\n");
return -ENOMEM;
}
for (i = 0; i < ARRAY_SIZE(rtwusb->tx_queue); i++)
skb_queue_head_init(&rtwusb->tx_queue[i]);
INIT_WORK(&rtwusb->tx_work, rtw_usb_tx_handler);
return 0;
}
static void rtw_usb_deinit_tx(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
destroy_workqueue(rtwusb->txwq);
rtw_usb_tx_queue_purge(rtwusb);
}
static int rtw_usb_intf_init(struct rtw_dev *rtwdev,
struct usb_interface *intf)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
struct usb_device *udev = usb_get_dev(interface_to_usbdev(intf));
int ret;
rtwusb->udev = udev;
ret = rtw_usb_parse(rtwdev, intf);
if (ret)
return ret;
rtwusb->usb_data = kcalloc(RTW_USB_MAX_RXTX_COUNT, sizeof(u32),
GFP_KERNEL);
if (!rtwusb->usb_data)
return -ENOMEM;
usb_set_intfdata(intf, rtwdev->hw);
SET_IEEE80211_DEV(rtwdev->hw, &intf->dev);
spin_lock_init(&rtwusb->usb_lock);
return 0;
}
static void rtw_usb_intf_deinit(struct rtw_dev *rtwdev,
struct usb_interface *intf)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
usb_put_dev(rtwusb->udev);
kfree(rtwusb->usb_data);
usb_set_intfdata(intf, NULL);
}
static int rtw_usb_switch_mode_old(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
enum usb_device_speed cur_speed = rtwusb->udev->speed;
u8 hci_opt;
if (cur_speed == USB_SPEED_HIGH) {
hci_opt = rtw_read8(rtwdev, REG_HCI_OPT_CTRL);
if ((hci_opt & (BIT(2) | BIT(3))) != BIT(3)) {
rtw_write8(rtwdev, REG_HCI_OPT_CTRL, 0x8);
rtw_write8(rtwdev, REG_SYS_SDIO_CTRL, 0x2);
rtw_write8(rtwdev, REG_ACLK_MON, 0x1);
rtw_write8(rtwdev, 0x3d, 0x3);
rtw_write8(rtwdev, REG_SYS_PW_CTRL + 1, 0x80);
return 1;
}
} else if (cur_speed == USB_SPEED_SUPER) {
rtw_write8_clr(rtwdev, REG_SYS_SDIO_CTRL, BIT(1));
rtw_write8_clr(rtwdev, REG_ACLK_MON, BIT(0));
}
return 0;
}
static int rtw_usb_switch_mode_new(struct rtw_dev *rtwdev)
{
enum usb_device_speed cur_speed;
u8 id = rtwdev->chip->id;
bool can_switch;
u32 pad_ctrl2;
if (rtw_read8(rtwdev, REG_SYS_CFG2 + 3) == 0x20)
cur_speed = USB_SPEED_SUPER;
else
cur_speed = USB_SPEED_HIGH;
if (cur_speed == USB_SPEED_SUPER)
return 0;
pad_ctrl2 = rtw_read32(rtwdev, REG_PAD_CTRL2);
can_switch = !!(pad_ctrl2 & (BIT_MASK_USB23_SW_MODE_V1 |
BIT_USB3_USB2_TRANSITION));
if (!can_switch) {
rtw_dbg(rtwdev, RTW_DBG_USB,
"Switching to USB 3 mode unsupported by the chip\n");
return 0;
}
if (u32_get_bits(pad_ctrl2, BIT_MASK_USB23_SW_MODE_V1) == BIT_USB_MODE_U3)
return 0;
if (id == RTW_CHIP_TYPE_8822B || id == RTW_CHIP_TYPE_8821C)
rtw_write8_clr(rtwdev, REG_SW_MDIO + 3, BIT(0));
u32p_replace_bits(&pad_ctrl2, BIT_USB_MODE_U3, BIT_MASK_USB23_SW_MODE_V1);
pad_ctrl2 |= BIT_RSM_EN_V1;
rtw_write32(rtwdev, REG_PAD_CTRL2, pad_ctrl2);
rtw_write8(rtwdev, REG_PAD_CTRL2 + 1, 4);
rtw_write16_set(rtwdev, REG_SYS_PW_CTRL, BIT_APFM_OFFMAC);
usleep_range(1000, 1001);
rtw_write32_set(rtwdev, REG_PAD_CTRL2, BIT_NO_PDN_CHIPOFF_V1);
return 1;
}
static bool rtw_usb3_chip_old(u8 chip_id)
{
return chip_id == RTW_CHIP_TYPE_8812A ||
chip_id == RTW_CHIP_TYPE_8814A;
}
static bool rtw_usb3_chip_new(u8 chip_id)
{
return chip_id == RTW_CHIP_TYPE_8822C ||
chip_id == RTW_CHIP_TYPE_8822B;
}
static int rtw_usb_switch_mode(struct rtw_dev *rtwdev)
{
u8 id = rtwdev->chip->id;
if (!rtw_usb3_chip_new(id) && !rtw_usb3_chip_old(id))
return 0;
if (!rtwdev->efuse.usb_mode_switch) {
rtw_dbg(rtwdev, RTW_DBG_USB,
"Switching to USB 3 mode disabled by chip's efuse\n");
return 0;
}
if (!rtw_switch_usb_mode) {
rtw_dbg(rtwdev, RTW_DBG_USB,
"Switching to USB 3 mode disabled by module parameter\n");
return 0;
}
if (rtw_usb3_chip_old(id))
return rtw_usb_switch_mode_old(rtwdev);
else
return rtw_usb_switch_mode_new(rtwdev);
}
#define USB_REG_PAGE 0xf4
#define USB_PHY_PAGE0 0x9b
#define USB_PHY_PAGE1 0xbb
static void rtw_usb_phy_write(struct rtw_dev *rtwdev, u8 addr, u16 data,
enum usb_device_speed speed)
{
if (speed == USB_SPEED_SUPER) {
rtw_write8(rtwdev, REG_USB3_PHY_DAT_L, data & 0xff);
rtw_write8(rtwdev, REG_USB3_PHY_DAT_H, data >> 8);
rtw_write8(rtwdev, REG_USB3_PHY_ADR, addr | BIT_USB3_PHY_ADR_WR);
} else if (speed == USB_SPEED_HIGH) {
rtw_write8(rtwdev, REG_USB2_PHY_DAT, data);
rtw_write8(rtwdev, REG_USB2_PHY_ADR, addr);
rtw_write8(rtwdev, REG_USB2_PHY_CMD, BIT_USB2_PHY_CMD_TRG);
}
}
static void rtw_usb_page_switch(struct rtw_dev *rtwdev,
enum usb_device_speed speed, u8 page)
{
if (speed == USB_SPEED_SUPER)
return;
rtw_usb_phy_write(rtwdev, USB_REG_PAGE, page, speed);
}
static void rtw_usb_phy_cfg(struct rtw_dev *rtwdev,
enum usb_device_speed speed)
{
const struct rtw_intf_phy_para *para = NULL;
u16 offset;
if (!rtwdev->chip->intf_table)
return;
if (speed == USB_SPEED_SUPER)
para = rtwdev->chip->intf_table->usb3_para;
else if (speed == USB_SPEED_HIGH)
para = rtwdev->chip->intf_table->usb2_para;
if (!para)
return;
for ( ; para->offset != 0xffff; para++) {
if (!(para->cut_mask & BIT(rtwdev->hal.cut_version)))
continue;
offset = para->offset;
if (para->ip_sel == RTW_IP_SEL_MAC) {
rtw_write8(rtwdev, offset, para->value);
} else {
if (offset > 0x100)
rtw_usb_page_switch(rtwdev, speed, USB_PHY_PAGE1);
else
rtw_usb_page_switch(rtwdev, speed, USB_PHY_PAGE0);
offset &= 0xff;
rtw_usb_phy_write(rtwdev, offset, para->value, speed);
}
}
}
int rtw_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct rtw_dev *rtwdev;
struct ieee80211_hw *hw;
struct rtw_usb *rtwusb;
int drv_data_size;
int ret;
drv_data_size = sizeof(struct rtw_dev) + sizeof(struct rtw_usb);
hw = ieee80211_alloc_hw(drv_data_size, &rtw_ops);
if (!hw)
return -ENOMEM;
rtwdev = hw->priv;
rtwdev->hw = hw;
rtwdev->dev = &intf->dev;
rtwdev->chip = (struct rtw_chip_info *)id->driver_info;
rtwdev->hci.ops = &rtw_usb_ops;
rtwdev->hci.type = RTW_HCI_TYPE_USB;
rtwusb = rtw_get_usb_priv(rtwdev);
rtwusb->rtwdev = rtwdev;
ret = rtw_usb_alloc_rx_bufs(rtwusb);
if (ret)
goto err_release_hw;
ret = rtw_core_init(rtwdev);
if (ret)
goto err_free_rx_bufs;
ret = rtw_usb_intf_init(rtwdev, intf);
if (ret) {
rtw_err(rtwdev, "failed to init USB interface\n");
goto err_deinit_core;
}
ret = rtw_usb_init_tx(rtwdev);
if (ret) {
rtw_err(rtwdev, "failed to init USB TX\n");
goto err_destroy_usb;
}
ret = rtw_usb_init_rx(rtwdev);
if (ret) {
rtw_err(rtwdev, "failed to init USB RX\n");
goto err_destroy_txwq;
}
ret = rtw_chip_info_setup(rtwdev);
if (ret) {
rtw_err(rtwdev, "failed to setup chip information\n");
goto err_destroy_rxwq;
}
rtw_usb_phy_cfg(rtwdev, USB_SPEED_HIGH);
rtw_usb_phy_cfg(rtwdev, USB_SPEED_SUPER);
ret = rtw_usb_switch_mode(rtwdev);
if (ret) {
rtw_dbg(rtwdev, RTW_DBG_USB, "switching to USB 3 mode\n");
ret = 0;
goto err_destroy_rxwq;
}
ret = rtw_register_hw(rtwdev, rtwdev->hw);
if (ret) {
rtw_err(rtwdev, "failed to register hw\n");
goto err_destroy_rxwq;
}
rtw_usb_setup_rx(rtwdev);
return 0;
err_destroy_rxwq:
rtw_usb_deinit_rx(rtwdev);
err_destroy_txwq:
rtw_usb_deinit_tx(rtwdev);
err_destroy_usb:
rtw_usb_intf_deinit(rtwdev, intf);
err_deinit_core:
rtw_core_deinit(rtwdev);
err_free_rx_bufs:
rtw_usb_free_rx_bufs(rtwusb);
err_release_hw:
ieee80211_free_hw(hw);
return ret;
}
EXPORT_SYMBOL(rtw_usb_probe);
void rtw_usb_disconnect(struct usb_interface *intf)
{
struct ieee80211_hw *hw = usb_get_intfdata(intf);
struct rtw_dev *rtwdev;
struct rtw_usb *rtwusb;
if (!hw)
return;
rtwdev = hw->priv;
rtwusb = rtw_get_usb_priv(rtwdev);
rtw_usb_cancel_rx_bufs(rtwusb);
rtw_unregister_hw(rtwdev, hw);
rtw_usb_deinit_tx(rtwdev);
rtw_usb_deinit_rx(rtwdev);
if (rtwusb->udev->state != USB_STATE_NOTATTACHED)
usb_reset_device(rtwusb->udev);
rtw_usb_free_rx_bufs(rtwusb);
rtw_usb_intf_deinit(rtwdev, intf);
rtw_core_deinit(rtwdev);
ieee80211_free_hw(hw);
}
EXPORT_SYMBOL(rtw_usb_disconnect);
MODULE_AUTHOR("Realtek Corporation");
MODULE_DESCRIPTION("Realtek USB 802.11ac wireless driver");
MODULE_LICENSE("Dual BSD/GPL");
