swh:1:snp:c3bf2749e3476071fa748f67b0ffa2fdc5fe49d9
Tip revision: 9e1ff307c779ce1f0f810c7ecce3d95bbae40896 authored by Linus Torvalds on 03 October 2021, 21:08:47 UTC
Linux 5.15-rc4
Linux 5.15-rc4
Tip revision: 9e1ff30
usb_ops_linux.c
// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
* usb_ops_linux.c
*
* Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
* Linux device driver for RTL8192SU
*
* Modifications for inclusion into the Linux staging tree are
* Copyright(c) 2010 Larry Finger. All rights reserved.
*
* Contact information:
* WLAN FAE <wlanfae@realtek.com>
* Larry Finger <Larry.Finger@lwfinger.net>
*
******************************************************************************/
#define _HCI_OPS_OS_C_
#include <linux/usb.h>
#include "osdep_service.h"
#include "drv_types.h"
#include "osdep_intf.h"
#include "usb_ops.h"
#define RTL871X_VENQT_READ 0xc0
#define RTL871X_VENQT_WRITE 0x40
struct zero_bulkout_context {
void *pbuf;
void *purb;
void *pirp;
void *padapter;
};
uint r8712_usb_init_intf_priv(struct intf_priv *pintfpriv)
{
pintfpriv->piorw_urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!pintfpriv->piorw_urb)
return _FAIL;
init_completion(&pintfpriv->io_retevt_comp);
return _SUCCESS;
}
void r8712_usb_unload_intf_priv(struct intf_priv *pintfpriv)
{
if (pintfpriv->piorw_urb) {
usb_kill_urb(pintfpriv->piorw_urb);
usb_free_urb(pintfpriv->piorw_urb);
}
}
static unsigned int ffaddr2pipehdl(struct dvobj_priv *pdvobj, u32 addr)
{
unsigned int pipe = 0;
struct usb_device *pusbd = pdvobj->pusbdev;
if (pdvobj->nr_endpoint == 11) {
switch (addr) {
case RTL8712_DMA_BKQ:
pipe = usb_sndbulkpipe(pusbd, 0x07);
break;
case RTL8712_DMA_BEQ:
pipe = usb_sndbulkpipe(pusbd, 0x06);
break;
case RTL8712_DMA_VIQ:
pipe = usb_sndbulkpipe(pusbd, 0x05);
break;
case RTL8712_DMA_VOQ:
pipe = usb_sndbulkpipe(pusbd, 0x04);
break;
case RTL8712_DMA_BCNQ:
pipe = usb_sndbulkpipe(pusbd, 0x0a);
break;
case RTL8712_DMA_BMCQ: /* HI Queue */
pipe = usb_sndbulkpipe(pusbd, 0x0b);
break;
case RTL8712_DMA_MGTQ:
pipe = usb_sndbulkpipe(pusbd, 0x0c);
break;
case RTL8712_DMA_RX0FF:
pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
break;
case RTL8712_DMA_C2HCMD:
pipe = usb_rcvbulkpipe(pusbd, 0x09); /* in */
break;
case RTL8712_DMA_H2CCMD:
pipe = usb_sndbulkpipe(pusbd, 0x0d);
break;
}
} else if (pdvobj->nr_endpoint == 6) {
switch (addr) {
case RTL8712_DMA_BKQ:
pipe = usb_sndbulkpipe(pusbd, 0x07);
break;
case RTL8712_DMA_BEQ:
pipe = usb_sndbulkpipe(pusbd, 0x06);
break;
case RTL8712_DMA_VIQ:
pipe = usb_sndbulkpipe(pusbd, 0x05);
break;
case RTL8712_DMA_VOQ:
pipe = usb_sndbulkpipe(pusbd, 0x04);
break;
case RTL8712_DMA_RX0FF:
case RTL8712_DMA_C2HCMD:
pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
break;
case RTL8712_DMA_H2CCMD:
case RTL8712_DMA_BCNQ:
case RTL8712_DMA_BMCQ:
case RTL8712_DMA_MGTQ:
pipe = usb_sndbulkpipe(pusbd, 0x0d);
break;
}
} else if (pdvobj->nr_endpoint == 4) {
switch (addr) {
case RTL8712_DMA_BEQ:
pipe = usb_sndbulkpipe(pusbd, 0x06);
break;
case RTL8712_DMA_VOQ:
pipe = usb_sndbulkpipe(pusbd, 0x04);
break;
case RTL8712_DMA_RX0FF:
case RTL8712_DMA_C2HCMD:
pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
break;
case RTL8712_DMA_H2CCMD:
case RTL8712_DMA_BCNQ:
case RTL8712_DMA_BMCQ:
case RTL8712_DMA_MGTQ:
pipe = usb_sndbulkpipe(pusbd, 0x0d);
break;
}
} else {
pipe = 0;
}
return pipe;
}
static void usb_write_mem_complete(struct urb *purb)
{
struct io_queue *pio_q = (struct io_queue *)purb->context;
struct intf_hdl *pintf = &(pio_q->intf);
struct intf_priv *pintfpriv = pintf->pintfpriv;
struct _adapter *padapter = (struct _adapter *)pintf->adapter;
if (purb->status != 0) {
if (purb->status == (-ESHUTDOWN))
padapter->driver_stopped = true;
else
padapter->surprise_removed = true;
}
complete(&pintfpriv->io_retevt_comp);
}
void r8712_usb_write_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
{
unsigned int pipe;
struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
struct io_queue *pio_queue = padapter->pio_queue;
struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
struct usb_device *pusbd = pdvobj->pusbdev;
struct urb *piorw_urb = pintfpriv->piorw_urb;
if ((padapter->driver_stopped) || (padapter->surprise_removed) ||
(padapter->pwrctrlpriv.pnp_bstop_trx))
return;
/* translate DMA FIFO addr to pipehandle */
pipe = ffaddr2pipehdl(pdvobj, addr);
if (pipe == 0)
return;
usb_fill_bulk_urb(piorw_urb, pusbd, pipe,
wmem, cnt, usb_write_mem_complete,
pio_queue);
usb_submit_urb(piorw_urb, GFP_ATOMIC);
wait_for_completion_interruptible(&pintfpriv->io_retevt_comp);
}
static void r8712_usb_read_port_complete(struct urb *purb)
{
uint isevt;
__le32 *pbuf;
struct recv_buf *precvbuf = (struct recv_buf *)purb->context;
struct _adapter *padapter = (struct _adapter *)precvbuf->adapter;
struct recv_priv *precvpriv = &padapter->recvpriv;
if (padapter->surprise_removed || padapter->driver_stopped)
return;
if (purb->status == 0) { /* SUCCESS */
if ((purb->actual_length > (MAX_RECVBUF_SZ)) ||
(purb->actual_length < RXDESC_SIZE)) {
r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
(unsigned char *)precvbuf);
} else {
_pkt *pskb = precvbuf->pskb;
precvbuf->transfer_len = purb->actual_length;
pbuf = (__le32 *)precvbuf->pbuf;
isevt = le32_to_cpu(*(pbuf + 1)) & 0x1ff;
if ((isevt & 0x1ff) == 0x1ff) {
r8712_rxcmd_event_hdl(padapter, pbuf);
skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
r8712_read_port(padapter, precvpriv->ff_hwaddr,
0, (unsigned char *)precvbuf);
} else {
skb_put(pskb, purb->actual_length);
skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
tasklet_hi_schedule(&precvpriv->recv_tasklet);
r8712_read_port(padapter, precvpriv->ff_hwaddr,
0, (unsigned char *)precvbuf);
}
}
} else {
switch (purb->status) {
case -EINVAL:
case -EPIPE:
case -ENODEV:
case -ESHUTDOWN:
padapter->driver_stopped = true;
break;
case -ENOENT:
if (!padapter->suspended) {
padapter->driver_stopped = true;
break;
}
fallthrough;
case -EPROTO:
r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
(unsigned char *)precvbuf);
break;
case -EINPROGRESS:
netdev_err(padapter->pnetdev, "ERROR: URB IS IN PROGRESS!\n");
break;
default:
break;
}
}
}
u32 r8712_usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
{
unsigned int pipe;
int err;
u32 tmpaddr = 0;
int alignment = 0;
u32 ret = _SUCCESS;
struct urb *purb = NULL;
struct recv_buf *precvbuf = (struct recv_buf *)rmem;
struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
struct _adapter *adapter = pdvobj->padapter;
struct recv_priv *precvpriv = &adapter->recvpriv;
struct usb_device *pusbd = pdvobj->pusbdev;
if (adapter->driver_stopped || adapter->surprise_removed ||
adapter->pwrctrlpriv.pnp_bstop_trx || !precvbuf)
return _FAIL;
r8712_init_recvbuf(adapter, precvbuf);
/* Try to use skb from the free queue */
precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
if (!precvbuf->pskb) {
precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev,
MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
if (!precvbuf->pskb)
return _FAIL;
tmpaddr = (addr_t)precvbuf->pskb->data;
alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
skb_reserve(precvbuf->pskb,
(RECVBUFF_ALIGN_SZ - alignment));
precvbuf->phead = precvbuf->pskb->head;
precvbuf->pdata = precvbuf->pskb->data;
precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
precvbuf->pend = skb_end_pointer(precvbuf->pskb);
precvbuf->pbuf = precvbuf->pskb->data;
} else { /* skb is reused */
precvbuf->phead = precvbuf->pskb->head;
precvbuf->pdata = precvbuf->pskb->data;
precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
precvbuf->pend = skb_end_pointer(precvbuf->pskb);
precvbuf->pbuf = precvbuf->pskb->data;
}
purb = precvbuf->purb;
/* translate DMA FIFO addr to pipehandle */
pipe = ffaddr2pipehdl(pdvobj, addr);
usb_fill_bulk_urb(purb, pusbd, pipe,
precvbuf->pbuf, MAX_RECVBUF_SZ,
r8712_usb_read_port_complete,
precvbuf);
err = usb_submit_urb(purb, GFP_ATOMIC);
if ((err) && (err != (-EPERM)))
ret = _FAIL;
return ret;
}
void r8712_usb_read_port_cancel(struct _adapter *padapter)
{
int i;
struct recv_buf *precvbuf;
precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
for (i = 0; i < NR_RECVBUFF; i++) {
if (precvbuf->purb)
usb_kill_urb(precvbuf->purb);
precvbuf++;
}
}
void r8712_xmit_bh(struct tasklet_struct *t)
{
int ret = false;
struct _adapter *padapter = from_tasklet(padapter, t,
xmitpriv.xmit_tasklet);
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
if (padapter->driver_stopped ||
padapter->surprise_removed) {
netdev_err(padapter->pnetdev, "xmit_bh => driver_stopped or surprise_removed\n");
return;
}
ret = r8712_xmitframe_complete(padapter, pxmitpriv, NULL);
if (!ret)
return;
tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
}
static void usb_write_port_complete(struct urb *purb)
{
int i;
struct xmit_frame *pxmitframe = (struct xmit_frame *)purb->context;
struct xmit_buf *pxmitbuf = pxmitframe->pxmitbuf;
struct _adapter *padapter = pxmitframe->padapter;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
struct pkt_attrib *pattrib = &pxmitframe->attrib;
switch (pattrib->priority) {
case 1:
case 2:
pxmitpriv->bkq_cnt--;
break;
case 4:
case 5:
pxmitpriv->viq_cnt--;
break;
case 6:
case 7:
pxmitpriv->voq_cnt--;
break;
case 0:
case 3:
default:
pxmitpriv->beq_cnt--;
break;
}
pxmitpriv->txirp_cnt--;
for (i = 0; i < 8; i++) {
if (purb == pxmitframe->pxmit_urb[i]) {
pxmitframe->bpending[i] = false;
break;
}
}
if (padapter->surprise_removed)
return;
switch (purb->status) {
case 0:
break;
default:
netdev_warn(padapter->pnetdev,
"r8712u: pipe error: (%d)\n", purb->status);
break;
}
/* not to consider tx fragment */
r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
}
u32 r8712_usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
{
unsigned long irqL;
int i, status;
unsigned int pipe;
u32 ret, bwritezero;
struct urb *purb = NULL;
struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
struct xmit_frame *pxmitframe = (struct xmit_frame *)wmem;
struct usb_device *pusbd = pdvobj->pusbdev;
struct pkt_attrib *pattrib = &pxmitframe->attrib;
if ((padapter->driver_stopped) || (padapter->surprise_removed) ||
(padapter->pwrctrlpriv.pnp_bstop_trx))
return _FAIL;
for (i = 0; i < 8; i++) {
if (!pxmitframe->bpending[i]) {
spin_lock_irqsave(&pxmitpriv->lock, irqL);
pxmitpriv->txirp_cnt++;
pxmitframe->bpending[i] = true;
switch (pattrib->priority) {
case 1:
case 2:
pxmitpriv->bkq_cnt++;
break;
case 4:
case 5:
pxmitpriv->viq_cnt++;
break;
case 6:
case 7:
pxmitpriv->voq_cnt++;
break;
case 0:
case 3:
default:
pxmitpriv->beq_cnt++;
break;
}
spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
pxmitframe->sz[i] = (u16)cnt;
purb = pxmitframe->pxmit_urb[i];
break;
}
}
bwritezero = false;
if (pdvobj->ishighspeed) {
if (cnt > 0 && cnt % 512 == 0)
bwritezero = true;
} else {
if (cnt > 0 && cnt % 64 == 0)
bwritezero = true;
}
/* translate DMA FIFO addr to pipehandle */
pipe = ffaddr2pipehdl(pdvobj, addr);
if (pxmitpriv->free_xmitbuf_cnt % NR_XMITBUFF == 0)
purb->transfer_flags &= (~URB_NO_INTERRUPT);
else
purb->transfer_flags |= URB_NO_INTERRUPT;
if (bwritezero)
cnt += 8;
usb_fill_bulk_urb(purb, pusbd, pipe,
pxmitframe->mem_addr,
cnt, usb_write_port_complete,
pxmitframe); /* context is xmit_frame */
status = usb_submit_urb(purb, GFP_ATOMIC);
if (!status)
ret = _SUCCESS;
else
ret = _FAIL;
return ret;
}
void r8712_usb_write_port_cancel(struct _adapter *padapter)
{
int i, j;
struct xmit_buf *pxmitbuf = (struct xmit_buf *)
padapter->xmitpriv.pxmitbuf;
for (i = 0; i < NR_XMITBUFF; i++) {
for (j = 0; j < 8; j++) {
if (pxmitbuf->pxmit_urb[j])
usb_kill_urb(pxmitbuf->pxmit_urb[j]);
}
pxmitbuf++;
}
}
int r8712_usbctrl_vendorreq(struct intf_priv *pintfpriv, u8 request, u16 value,
u16 index, void *pdata, u16 len, u8 requesttype)
{
unsigned int pipe;
int status;
u8 reqtype;
struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
pintfpriv->intf_dev;
struct usb_device *udev = pdvobjpriv->pusbdev;
/* For mstar platform, mstar suggests the address for USB IO
* should be 16 bytes alignment. Trying to fix it here.
*/
u8 *palloc_buf, *pIo_buf;
palloc_buf = kmalloc((u32)len + 16, GFP_ATOMIC);
if (!palloc_buf)
return -ENOMEM;
pIo_buf = palloc_buf + 16 - ((addr_t)(palloc_buf) & 0x0f);
if (requesttype == 0x01) {
pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
reqtype = RTL871X_VENQT_READ;
} else {
pipe = usb_sndctrlpipe(udev, 0); /* write_out */
reqtype = RTL871X_VENQT_WRITE;
memcpy(pIo_buf, pdata, len);
}
status = usb_control_msg(udev, pipe, request, reqtype, value, index,
pIo_buf, len, HZ / 2);
if (status > 0) { /* Success this control transfer. */
if (requesttype == 0x01) {
/* For Control read transfer, we have to copy the read
* data from pIo_buf to pdata.
*/
memcpy(pdata, pIo_buf, status);
}
}
kfree(palloc_buf);
return status;
}