https://github.com/torvalds/linux
Tip revision: 6465e260f48790807eef06b583b38ca9789b6072 authored by Linus Torvalds on 24 September 2023, 21:31:13 UTC
Linux 6.6-rc3
Linux 6.6-rc3
Tip revision: 6465e26
rtl8712_cmd.c
// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
* rtl8712_cmd.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 _RTL8712_CMD_C_
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/sched/signal.h>
#include <linux/module.h>
#include <linux/kref.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/usb.h>
#include <linux/usb/ch9.h>
#include <linux/circ_buf.h>
#include <linux/uaccess.h>
#include <asm/byteorder.h>
#include <linux/atomic.h>
#include <linux/semaphore.h>
#include <linux/rtnetlink.h>
#include "osdep_service.h"
#include "drv_types.h"
#include "recv_osdep.h"
#include "mlme_osdep.h"
#include "rtl871x_ioctl_set.h"
static void check_hw_pbc(struct _adapter *padapter)
{
u8 tmp1byte;
r8712_write8(padapter, MAC_PINMUX_CTRL, (GPIOMUX_EN | GPIOSEL_GPIO));
tmp1byte = r8712_read8(padapter, GPIO_IO_SEL);
tmp1byte &= ~(HAL_8192S_HW_GPIO_WPS_BIT);
r8712_write8(padapter, GPIO_IO_SEL, tmp1byte);
tmp1byte = r8712_read8(padapter, GPIO_CTRL);
if (tmp1byte == 0xff)
return;
if (tmp1byte & HAL_8192S_HW_GPIO_WPS_BIT) {
/* Here we only set bPbcPressed to true
* After trigger PBC, the variable will be set to false
*/
netdev_dbg(padapter->pnetdev, "CheckPbcGPIO - PBC is pressed !!!!\n");
/* 0 is the default value and it means the application monitors
* the HW PBC doesn't provide its pid to driver.
*/
if (padapter->pid == 0)
return;
kill_pid(find_vpid(padapter->pid), SIGUSR1, 1);
}
}
/* query rx phy status from fw.
* Adhoc mode: beacon.
* Infrastructure mode: beacon , data.
*/
static void query_fw_rx_phy_status(struct _adapter *padapter)
{
u32 val32 = 0;
int pollingcnts = 50;
if (check_fwstate(&padapter->mlmepriv, _FW_LINKED)) {
r8712_write32(padapter, IOCMD_CTRL_REG, 0xf4000001);
msleep(100);
/* Wait FW complete IO Cmd */
while ((r8712_read32(padapter, IOCMD_CTRL_REG)) &&
(pollingcnts > 0)) {
pollingcnts--;
msleep(20);
}
if (pollingcnts != 0)
val32 = r8712_read32(padapter, IOCMD_DATA_REG);
else /* time out */
val32 = 0;
val32 >>= 4;
padapter->recvpriv.fw_rssi =
(u8)r8712_signal_scale_mapping(val32);
}
}
/* check mlme, hw, phy, or dynamic algorithm status. */
static void StatusWatchdogCallback(struct _adapter *padapter)
{
check_hw_pbc(padapter);
query_fw_rx_phy_status(padapter);
}
static void r871x_internal_cmd_hdl(struct _adapter *padapter, u8 *pbuf)
{
struct drvint_cmd_parm *pdrvcmd;
if (!pbuf)
return;
pdrvcmd = (struct drvint_cmd_parm *)pbuf;
switch (pdrvcmd->i_cid) {
case WDG_WK_CID:
StatusWatchdogCallback(padapter);
break;
default:
break;
}
kfree(pdrvcmd->pbuf);
}
static u8 read_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
{
struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
r8712_free_cmd_obj(pcmd);
return H2C_SUCCESS;
}
static u8 write_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
{
void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
if (!pcmd_callback)
r8712_free_cmd_obj(pcmd);
else
pcmd_callback(padapter, pcmd);
return H2C_SUCCESS;
}
static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
{
u32 val;
void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
if (pcmd->rsp && pcmd->rspsz > 0)
memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
if (!pcmd_callback)
r8712_free_cmd_obj(pcmd);
else
pcmd_callback(padapter, pcmd);
return H2C_SUCCESS;
}
static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
{
void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
if (!pcmd_callback)
r8712_free_cmd_obj(pcmd);
else
pcmd_callback(padapter, pcmd);
return H2C_SUCCESS;
}
static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf)
{
struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
r8712_free_cmd_obj(pcmd);
return H2C_SUCCESS;
}
static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
struct cmd_obj *pcmd)
{
struct cmd_obj *pcmd_r;
if (!pcmd)
return pcmd;
pcmd_r = NULL;
switch (pcmd->cmdcode) {
case GEN_CMD_CODE(_Read_BBREG):
read_bbreg_hdl(padapter, (u8 *)pcmd);
break;
case GEN_CMD_CODE(_Write_BBREG):
write_bbreg_hdl(padapter, (u8 *)pcmd);
break;
case GEN_CMD_CODE(_Read_RFREG):
read_rfreg_hdl(padapter, (u8 *)pcmd);
break;
case GEN_CMD_CODE(_Write_RFREG):
write_rfreg_hdl(padapter, (u8 *)pcmd);
break;
case GEN_CMD_CODE(_SetUsbSuspend):
sys_suspend_hdl(padapter, (u8 *)pcmd);
break;
case GEN_CMD_CODE(_JoinBss):
r8712_joinbss_reset(padapter);
/* Before set JoinBss_CMD to FW, driver must ensure FW is in
* PS_MODE_ACTIVE. Directly write rpwm to radio on and assign
* new pwr_mode to Driver, instead of use workitem to change
* state.
*/
if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) {
padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE;
mutex_lock(&padapter->pwrctrlpriv.mutex_lock);
r8712_set_rpwm(padapter, PS_STATE_S4);
mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
}
pcmd_r = pcmd;
break;
case _DRV_INT_CMD_:
r871x_internal_cmd_hdl(padapter, pcmd->parmbuf);
r8712_free_cmd_obj(pcmd);
pcmd_r = NULL;
break;
default:
pcmd_r = pcmd;
break;
}
return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */
}
u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)
{
int pollingcnts = 50;
r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd);
msleep(100);
while ((r8712_read32(pAdapter, IOCMD_CTRL_REG != 0)) &&
(pollingcnts > 0)) {
pollingcnts--;
msleep(20);
}
if (pollingcnts == 0)
return false;
return true;
}
void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag)
{
if (flag == 0) /* set */
r8712_write32(pAdapter, IOCMD_DATA_REG, *value);
else /* query */
*value = r8712_read32(pAdapter, IOCMD_DATA_REG);
}
int r8712_cmd_thread(void *context)
{
struct cmd_obj *pcmd;
unsigned int cmdsz, wr_sz;
__le32 *pcmdbuf;
struct tx_desc *pdesc;
void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
struct _adapter *padapter = context;
struct cmd_priv *pcmdpriv = &padapter->cmdpriv;
struct completion *cmd_queue_comp =
&pcmdpriv->cmd_queue_comp;
struct mutex *pwctrl_lock = &padapter->pwrctrlpriv.mutex_lock;
allow_signal(SIGTERM);
while (1) {
if (wait_for_completion_interruptible(cmd_queue_comp))
break;
if (padapter->driver_stopped || padapter->surprise_removed)
break;
if (r8712_register_cmd_alive(padapter))
continue;
_next:
pcmd = r8712_dequeue_cmd(&pcmdpriv->cmd_queue);
if (!(pcmd)) {
r8712_unregister_cmd_alive(padapter);
continue;
}
pcmdbuf = (__le32 *)pcmdpriv->cmd_buf;
pdesc = (struct tx_desc *)pcmdbuf;
memset(pdesc, 0, TXDESC_SIZE);
pcmd = cmd_hdl_filter(padapter, pcmd);
if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */
struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
u8 blnPending = 0;
u16 cmdcode = pcmd->cmdcode;
pcmdpriv->cmd_issued_cnt++;
cmdsz = round_up(pcmd->cmdsz, 8);
wr_sz = TXDESC_SIZE + 8 + cmdsz;
pdesc->txdw0 |= cpu_to_le32((wr_sz - TXDESC_SIZE) &
0x0000ffff);
if (pdvobj->ishighspeed) {
if ((wr_sz % 512) == 0)
blnPending = 1;
} else {
if ((wr_sz % 64) == 0)
blnPending = 1;
}
if (blnPending) { /* 32 bytes for TX Desc - 8 offset */
pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
OFFSET_SZ + 8) << OFFSET_SHT) &
0x00ff0000);
} else {
pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
OFFSET_SZ) <<
OFFSET_SHT) &
0x00ff0000);
}
pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) &
0x00001f00);
pcmdbuf += (TXDESC_SIZE >> 2);
*pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) |
(pcmd->cmdcode << 16) |
(pcmdpriv->cmd_seq << 24));
pcmdbuf += 2; /* 8 bytes alignment */
memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz);
if (blnPending)
wr_sz += 8; /* Append 8 bytes */
r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz,
(u8 *)pdesc);
pcmdpriv->cmd_seq++;
if (cmdcode == GEN_CMD_CODE(_CreateBss)) {
pcmd->res = H2C_SUCCESS;
pcmd_callback = cmd_callback[cmdcode].callback;
if (pcmd_callback)
pcmd_callback(padapter, pcmd);
continue;
}
if (cmdcode == GEN_CMD_CODE(_SetPwrMode)) {
if (padapter->pwrctrlpriv.bSleep) {
mutex_lock(pwctrl_lock);
r8712_set_rpwm(padapter, PS_STATE_S2);
mutex_unlock(pwctrl_lock);
}
}
r8712_free_cmd_obj(pcmd);
if (list_empty(&pcmdpriv->cmd_queue.queue)) {
r8712_unregister_cmd_alive(padapter);
continue;
} else {
goto _next;
}
} else {
goto _next;
}
flush_signals_thread();
}
/* free all cmd_obj resources */
do {
pcmd = r8712_dequeue_cmd(&pcmdpriv->cmd_queue);
if (!pcmd)
break;
r8712_free_cmd_obj(pcmd);
} while (1);
complete(&pcmdpriv->terminate_cmdthread_comp);
return 0;
}
void r8712_event_handle(struct _adapter *padapter, __le32 *peventbuf)
{
u8 evt_code, evt_seq;
u16 evt_sz;
void (*event_callback)(struct _adapter *dev, u8 *pbuf);
struct evt_priv *pevt_priv = &padapter->evtpriv;
if (!peventbuf)
goto _abort_event_;
evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff);
evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f);
evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff);
/* checking event sequence... */
if ((evt_seq & 0x7f) != pevt_priv->event_seq) {
pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
goto _abort_event_;
}
/* checking if event code is valid */
if (evt_code >= MAX_C2HEVT) {
pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
goto _abort_event_;
} else if ((evt_code == GEN_EVT_CODE(_Survey)) &&
(evt_sz > sizeof(struct wlan_bssid_ex))) {
pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
goto _abort_event_;
}
/* checking if event size match the event parm size */
if ((wlanevents[evt_code].parmsize) &&
(wlanevents[evt_code].parmsize != evt_sz)) {
pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
goto _abort_event_;
} else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) {
pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
goto _abort_event_;
}
pevt_priv->event_seq++; /* update evt_seq */
if (pevt_priv->event_seq > 127)
pevt_priv->event_seq = 0;
/* move to event content, 8 bytes alignment */
peventbuf = peventbuf + 2;
event_callback = wlanevents[evt_code].event_callback;
if (event_callback)
event_callback(padapter, (u8 *)peventbuf);
pevt_priv->evt_done_cnt++;
_abort_event_:
return;
}