diff options
Diffstat (limited to 'drivers/staging/r8188eu/hal/usb_ops_linux.c')
-rw-r--r-- | drivers/staging/r8188eu/hal/usb_ops_linux.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/drivers/staging/r8188eu/hal/usb_ops_linux.c b/drivers/staging/r8188eu/hal/usb_ops_linux.c new file mode 100644 index 000000000..7c72f5e04 --- /dev/null +++ b/drivers/staging/r8188eu/hal/usb_ops_linux.c @@ -0,0 +1,502 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2007 - 2011 Realtek Corporation. */ + +#include "../include/osdep_service.h" +#include "../include/drv_types.h" +#include "../include/osdep_intf.h" +#include "../include/usb_ops.h" +#include "../include/rtl8188e_hal.h" + +static int usb_read(struct intf_hdl *intf, u16 value, void *data, u8 size) +{ + struct adapter *adapt = intf->padapter; + struct dvobj_priv *dvobjpriv = adapter_to_dvobj(adapt); + struct usb_device *udev = dvobjpriv->pusbdev; + int status; + u8 io_buf[4]; + + if (adapt->bSurpriseRemoved) + return -EPERM; + + status = usb_control_msg_recv(udev, 0, REALTEK_USB_VENQT_CMD_REQ, + REALTEK_USB_VENQT_READ, value, + REALTEK_USB_VENQT_CMD_IDX, io_buf, + size, RTW_USB_CONTROL_MSG_TIMEOUT, + GFP_KERNEL); + + if (status == -ESHUTDOWN || + status == -ENODEV || + status == -ENOENT) { + /* + * device or controller has been disabled due to + * some problem that could not be worked around, + * device or bus doesn’t exist, endpoint does not + * exist or is not enabled. + */ + adapt->bSurpriseRemoved = true; + return status; + } + + if (status < 0) { + if (rtw_inc_and_chk_continual_urb_error(dvobjpriv)) + adapt->bSurpriseRemoved = true; + + return status; + } + + rtw_reset_continual_urb_error(dvobjpriv); + memcpy(data, io_buf, size); + + return status; +} + +static int usb_write(struct intf_hdl *intf, u16 value, void *data, u8 size) +{ + struct adapter *adapt = intf->padapter; + struct dvobj_priv *dvobjpriv = adapter_to_dvobj(adapt); + struct usb_device *udev = dvobjpriv->pusbdev; + int status; + u8 io_buf[VENDOR_CMD_MAX_DATA_LEN]; + + if (adapt->bSurpriseRemoved) + return -EPERM; + + memcpy(io_buf, data, size); + status = usb_control_msg_send(udev, 0, REALTEK_USB_VENQT_CMD_REQ, + REALTEK_USB_VENQT_WRITE, value, + REALTEK_USB_VENQT_CMD_IDX, io_buf, + size, RTW_USB_CONTROL_MSG_TIMEOUT, + GFP_KERNEL); + + if (status == -ESHUTDOWN || + status == -ENODEV || + status == -ENOENT) { + /* + * device or controller has been disabled due to + * some problem that could not be worked around, + * device or bus doesn’t exist, endpoint does not + * exist or is not enabled. + */ + adapt->bSurpriseRemoved = true; + return status; + } + + if (status < 0) { + if (rtw_inc_and_chk_continual_urb_error(dvobjpriv)) + adapt->bSurpriseRemoved = true; + + return status; + } + + rtw_reset_continual_urb_error(dvobjpriv); + + return status; +} + +int __must_check rtw_read8(struct adapter *adapter, u32 addr, u8 *data) +{ + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intf = &io_priv->intf; + u16 value = addr & 0xffff; + + return usb_read(intf, value, data, 1); +} + +int __must_check rtw_read16(struct adapter *adapter, u32 addr, u16 *data) +{ + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intf = &io_priv->intf; + u16 value = addr & 0xffff; + __le16 le_data; + int res; + + res = usb_read(intf, value, &le_data, 2); + if (res) + return res; + + *data = le16_to_cpu(le_data); + + return 0; +} + +int __must_check rtw_read32(struct adapter *adapter, u32 addr, u32 *data) +{ + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intf = &io_priv->intf; + u16 value = addr & 0xffff; + __le32 le_data; + int res; + + res = usb_read(intf, value, &le_data, 4); + if (res) + return res; + + *data = le32_to_cpu(le_data); + + return 0; +} + +int rtw_write8(struct adapter *adapter, u32 addr, u8 val) +{ + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intf = &io_priv->intf; + u16 value = addr & 0xffff; + int ret; + + ret = usb_write(intf, value, &val, 1); + + return RTW_STATUS_CODE(ret); +} + +int rtw_write16(struct adapter *adapter, u32 addr, u16 val) +{ + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intf = &io_priv->intf; + u16 value = addr & 0xffff; + __le16 data = cpu_to_le16(val); + int ret; + + ret = usb_write(intf, value, &data, 2); + + return RTW_STATUS_CODE(ret); +} + +int rtw_write32(struct adapter *adapter, u32 addr, u32 val) +{ + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intf = &io_priv->intf; + u16 value = addr & 0xffff; + __le32 data = cpu_to_le32(val); + int ret; + + ret = usb_write(intf, value, &data, 4); + + return RTW_STATUS_CODE(ret); +} + +int rtw_writeN(struct adapter *adapter, u32 addr, u32 length, u8 *data) +{ + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intf = &io_priv->intf; + u16 value = addr & 0xffff; + int ret; + + if (length > VENDOR_CMD_MAX_DATA_LEN) + return _FAIL; + + ret = usb_write(intf, value, data, length); + + return RTW_STATUS_CODE(ret); +} + +static void handle_txrpt_ccx_88e(struct adapter *adapter, u8 *buf) +{ + struct txrpt_ccx_88e *txrpt_ccx = (struct txrpt_ccx_88e *)buf; + + if (txrpt_ccx->int_ccx) { + if (txrpt_ccx->pkt_ok) + rtw_ack_tx_done(&adapter->xmitpriv, + RTW_SCTX_DONE_SUCCESS); + else + rtw_ack_tx_done(&adapter->xmitpriv, + RTW_SCTX_DONE_CCX_PKT_FAIL); + } +} + +static int recvbuf2recvframe(struct adapter *adapt, struct sk_buff *pskb) +{ + u8 *pbuf; + u8 shift_sz = 0; + u16 pkt_cnt; + u32 pkt_offset, skb_len, alloc_sz; + s32 transfer_len; + struct recv_stat *prxstat; + struct phy_stat *pphy_status = NULL; + struct sk_buff *pkt_copy = NULL; + struct recv_frame *precvframe = NULL; + struct rx_pkt_attrib *pattrib = NULL; + struct hal_data_8188e *haldata = &adapt->haldata; + struct recv_priv *precvpriv = &adapt->recvpriv; + struct __queue *pfree_recv_queue = &precvpriv->free_recv_queue; + + transfer_len = (s32)pskb->len; + pbuf = pskb->data; + + prxstat = (struct recv_stat *)pbuf; + pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff; + + do { + prxstat = (struct recv_stat *)pbuf; + + precvframe = rtw_alloc_recvframe(pfree_recv_queue); + if (!precvframe) + goto _exit_recvbuf2recvframe; + + INIT_LIST_HEAD(&precvframe->list); + precvframe->precvbuf = NULL; /* can't access the precvbuf for new arch. */ + precvframe->len = 0; + + update_recvframe_attrib_88e(precvframe, prxstat); + + pattrib = &precvframe->attrib; + + if ((pattrib->crc_err) || (pattrib->icv_err)) { + rtw_free_recvframe(precvframe, pfree_recv_queue); + goto _exit_recvbuf2recvframe; + } + + if ((pattrib->physt) && (pattrib->pkt_rpt_type == NORMAL_RX)) + pphy_status = (struct phy_stat *)(pbuf + RXDESC_OFFSET); + + pkt_offset = RXDESC_SIZE + pattrib->drvinfo_sz + pattrib->shift_sz + pattrib->pkt_len; + + if ((pattrib->pkt_len <= 0) || (pkt_offset > transfer_len)) { + rtw_free_recvframe(precvframe, pfree_recv_queue); + goto _exit_recvbuf2recvframe; + } + + /* Modified by Albert 20101213 */ + /* For 8 bytes IP header alignment. */ + if (pattrib->qos) /* Qos data, wireless lan header length is 26 */ + shift_sz = 6; + else + shift_sz = 0; + + skb_len = pattrib->pkt_len; + + /* for first fragment packet, driver need allocate 1536+drvinfo_sz+RXDESC_SIZE to defrag packet. */ + /* modify alloc_sz for recvive crc error packet by thomas 2011-06-02 */ + if ((pattrib->mfrag == 1) && (pattrib->frag_num == 0)) { + if (skb_len <= 1650) + alloc_sz = 1664; + else + alloc_sz = skb_len + 14; + } else { + alloc_sz = skb_len; + /* 6 is for IP header 8 bytes alignment in QoS packet case. */ + /* 8 is for skb->data 4 bytes alignment. */ + alloc_sz += 14; + } + + pkt_copy = netdev_alloc_skb(adapt->pnetdev, alloc_sz); + if (pkt_copy) { + precvframe->pkt = pkt_copy; + precvframe->rx_head = pkt_copy->data; + precvframe->rx_end = pkt_copy->data + alloc_sz; + skb_reserve(pkt_copy, 8 - ((size_t)(pkt_copy->data) & 7));/* force pkt_copy->data at 8-byte alignment address */ + skb_reserve(pkt_copy, shift_sz);/* force ip_hdr at 8-byte alignment address according to shift_sz. */ + memcpy(pkt_copy->data, (pbuf + pattrib->drvinfo_sz + RXDESC_SIZE), skb_len); + precvframe->rx_tail = pkt_copy->data; + precvframe->rx_data = pkt_copy->data; + } else { + if ((pattrib->mfrag == 1) && (pattrib->frag_num == 0)) { + rtw_free_recvframe(precvframe, pfree_recv_queue); + goto _exit_recvbuf2recvframe; + } + precvframe->pkt = skb_clone(pskb, GFP_ATOMIC); + if (precvframe->pkt) { + precvframe->rx_tail = pbuf + pattrib->drvinfo_sz + RXDESC_SIZE; + precvframe->rx_head = precvframe->rx_tail; + precvframe->rx_data = precvframe->rx_tail; + precvframe->rx_end = pbuf + pattrib->drvinfo_sz + RXDESC_SIZE + alloc_sz; + } else { + rtw_free_recvframe(precvframe, pfree_recv_queue); + goto _exit_recvbuf2recvframe; + } + } + + recvframe_put(precvframe, skb_len); + + pkt_offset = (u16)round_up(pkt_offset, 128); + + if (pattrib->pkt_rpt_type == NORMAL_RX) { /* Normal rx packet */ + if (pattrib->physt) + update_recvframe_phyinfo_88e(precvframe, (struct phy_stat *)pphy_status); + rtw_recv_entry(precvframe); + } else { + /* enqueue recvframe to txrtp queue */ + if (pattrib->pkt_rpt_type == TX_REPORT1) { + /* CCX-TXRPT ack for xmit mgmt frames. */ + handle_txrpt_ccx_88e(adapt, precvframe->rx_data); + } else if (pattrib->pkt_rpt_type == TX_REPORT2) { + ODM_RA_TxRPT2Handle_8188E( + &haldata->odmpriv, + precvframe->rx_data, + pattrib->pkt_len, + pattrib->MacIDValidEntry[0], + pattrib->MacIDValidEntry[1] + ); + } + rtw_free_recvframe(precvframe, pfree_recv_queue); + } + pkt_cnt--; + transfer_len -= pkt_offset; + pbuf += pkt_offset; + precvframe = NULL; + pkt_copy = NULL; + + if (transfer_len > 0 && pkt_cnt == 0) + pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff; + + } while ((transfer_len > 0) && (pkt_cnt > 0)); + +_exit_recvbuf2recvframe: + + return _SUCCESS; +} + +void rtl8188eu_recv_tasklet(unsigned long priv) +{ + struct sk_buff *pskb; + struct adapter *adapt = (struct adapter *)priv; + struct recv_priv *precvpriv = &adapt->recvpriv; + + while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) { + if ((adapt->bDriverStopped) || (adapt->bSurpriseRemoved)) { + dev_kfree_skb_any(pskb); + break; + } + recvbuf2recvframe(adapt, pskb); + skb_reset_tail_pointer(pskb); + pskb->len = 0; + skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb); + } +} + +static void usb_read_port_complete(struct urb *purb, struct pt_regs *regs) +{ + struct recv_buf *precvbuf = (struct recv_buf *)purb->context; + struct adapter *adapt = (struct adapter *)precvbuf->adapter; + struct recv_priv *precvpriv = &adapt->recvpriv; + + precvpriv->rx_pending_cnt--; + + if (adapt->bSurpriseRemoved || adapt->bDriverStopped || adapt->bReadPortCancel) { + precvbuf->reuse = true; + return; + } + + if (purb->status == 0) { /* SUCCESS */ + if ((purb->actual_length > MAX_RECVBUF_SZ) || (purb->actual_length < RXDESC_SIZE)) { + precvbuf->reuse = true; + rtw_read_port(adapt, (unsigned char *)precvbuf); + } else { + rtw_reset_continual_urb_error(adapter_to_dvobj(adapt)); + + skb_put(precvbuf->pskb, purb->actual_length); + skb_queue_tail(&precvpriv->rx_skb_queue, precvbuf->pskb); + + if (skb_queue_len(&precvpriv->rx_skb_queue) <= 1) + tasklet_schedule(&precvpriv->recv_tasklet); + + precvbuf->pskb = NULL; + precvbuf->reuse = false; + rtw_read_port(adapt, (unsigned char *)precvbuf); + } + } else { + skb_put(precvbuf->pskb, purb->actual_length); + precvbuf->pskb = NULL; + + if (rtw_inc_and_chk_continual_urb_error(adapter_to_dvobj(adapt))) + adapt->bSurpriseRemoved = true; + + switch (purb->status) { + case -EINVAL: + case -EPIPE: + case -ENODEV: + case -ESHUTDOWN: + case -ENOENT: + adapt->bDriverStopped = true; + break; + case -EPROTO: + case -EOVERFLOW: + precvbuf->reuse = true; + rtw_read_port(adapt, (unsigned char *)precvbuf); + break; + case -EINPROGRESS: + break; + default: + break; + } + } +} + +u32 rtw_read_port(struct adapter *adapter, u8 *rmem) +{ + struct urb *purb = NULL; + struct recv_buf *precvbuf = (struct recv_buf *)rmem; + struct dvobj_priv *pdvobj = adapter_to_dvobj(adapter); + struct recv_priv *precvpriv = &adapter->recvpriv; + struct usb_device *pusbd = pdvobj->pusbdev; + int err; + unsigned int pipe; + size_t tmpaddr = 0; + size_t alignment = 0; + u32 ret = _SUCCESS; + + if (adapter->bDriverStopped || adapter->bSurpriseRemoved) + return _FAIL; + + if (!precvbuf) + return _FAIL; + + if (!precvbuf->reuse || !precvbuf->pskb) { + precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue); + if (precvbuf->pskb) + precvbuf->reuse = true; + } + + /* re-assign for linux based on skb */ + if (!precvbuf->reuse || !precvbuf->pskb) { + precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev, MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ); + if (!precvbuf->pskb) + return _FAIL; + + tmpaddr = (size_t)precvbuf->pskb->data; + alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1); + skb_reserve(precvbuf->pskb, (RECVBUFF_ALIGN_SZ - alignment)); + } else { /* reuse skb */ + precvbuf->reuse = false; + } + + precvpriv->rx_pending_cnt++; + + purb = precvbuf->purb; + + /* translate DMA FIFO addr to pipehandle */ + pipe = usb_rcvbulkpipe(pusbd, pdvobj->RtInPipe); + + usb_fill_bulk_urb(purb, pusbd, pipe, + precvbuf->pskb->data, + MAX_RECVBUF_SZ, + usb_read_port_complete, + precvbuf);/* context is precvbuf */ + + err = usb_submit_urb(purb, GFP_ATOMIC); + if ((err) && (err != (-EPERM))) + ret = _FAIL; + + return ret; +} + +void rtl8188eu_xmit_tasklet(unsigned long priv) +{ + int ret = false; + struct adapter *adapt = (struct adapter *)priv; + struct xmit_priv *pxmitpriv = &adapt->xmitpriv; + + if (check_fwstate(&adapt->mlmepriv, _FW_UNDER_SURVEY)) + return; + + while (1) { + if ((adapt->bDriverStopped) || + (adapt->bSurpriseRemoved) || + (adapt->bWritePortCancel)) + break; + + ret = rtl8188eu_xmitframe_complete(adapt, pxmitpriv, NULL); + + if (!ret) + break; + } +} |