/************************************************************************
* Function Name : hc_add_trans
*
* This function sets up the SL811HS register and transmit the USB packets.
*
* 1) Determine if enough time within the current frame to send the packet
* 2) Load the data into the SL811HS register
* 3) Set the appropriate command to the register and trigger the transmit
*
* Input: hci = data structure for the host controller
* len = data length
* data = transmitting data
* toggle = USB toggle bit, either 0 or 1
* maxps = maximum packet size for this endpoint
* slow = speed of the device
* endpoint = endpoint number
* address = USB address of the device
* pid = packet ID
* format =
* urb_state = the current stage of USB transaction
*
* Return: 0 = no time left to schedule the transfer
* 1 = success
*
***********************************************************************/
static inline int hc_add_trans (hci_t * hci, int len, void *data, int toggle,
int maxps, int slow, int endpoint, int address,
int pid, int format, int urb_state)
{
hcipriv_t *hp = &hci->hp;
__u16 speed;
int ii, jj, kk;
DBGFUNC ("enter hc_addr_trans: len =0x%x, toggle:0x%x, endpoing:0x%x,"
" addr:0x%x, pid:0x%x,format:0x%x\n", len, toggle, endpoint,
i address, pid, format);
if (len > maxps) {
len = maxps;
}
speed = hp->RHportStatus->portStatus;
if (speed & PORT_LOW_SPEED_DEV_ATTACH_STAT) {
// ii = (8*7*8 + 6*3) * len + 800;
ii = 8 * 8 * len + 1024;
} else {
if (slow) {
// ii = (8*7*8 + 6*3) * len + 800;
ii = 8 * 8 * len + 2048;
} else
// ii = (8*7 + 6*3)*len + 110;
ii = 8 * len + 256;
}
ii += 2 * 10 * len;
jj = SL811Read (hci, SL11H_SOFTMRREG);
kk = (jj & 0xFF) * 64 - ii;
if (kk < 0) {
DBGVERBOSE
("hc_add_trans: no bandwidth for schedule, ii = 0x%x,"
"jj = 0x%x, len =0x%x, active_trans = 0x%x\n", ii, jj, len,
hci->active_trans);
return (-1);
}
if (pid != PID_IN) {
/* Load data into hc */
SL811BufWrite (hci, SL11H_DATA_START, (__u8 *) data, len);
}
/* transmit */
SL11StartXaction (hci, (__u8) address, (__u8) endpoint, (__u8) pid, len,
toggle, slow, urb_state);
return len;
}
/*****************************************************************
*
* Function Name: SL11StartXaction
*
* This functions load the registers with appropriate value and
* transmit the packet.
*
* Input: hci = data structure for the host controller
* addr = USB address of the device
* epaddr = endpoint number
* pid = packet ID
* len = data length
* toggle = USB toggle bit, either 0 or 1
* slow = speed of the device
* urb_state = the current stage of USB transaction
*
* Return: 0 = error; 1 = successful
*
*****************************************************************/
int SL11StartXaction (hci_t * hci, __u8 addr, __u8 epaddr, int pid, int len,
int toggle, int slow, int urb_state)
{
hcipriv_t *hp = &hci->hp;
__u8 cmd = 0;
__u8 setup_data[4];
__u16 speed;
speed = hp->RHportStatus->portStatus;
if (!(speed & PORT_LOW_SPEED_DEV_ATTACH_STAT) && slow) {
cmd |= SL11H_HCTLMASK_PREAMBLE;
}
switch (pid) {
case PID_SETUP:
cmd &= SL11H_HCTLMASK_PREAMBLE;
cmd |=
(SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENBLEP |
SL11H_HCTLMASK_WRITE);
break;
case PID_OUT:
cmd &= (SL11H_HCTLMASK_SEQ | SL11H_HCTLMASK_PREAMBLE);
cmd |=
(SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENBLEP |
SL11H_HCTLMASK_WRITE);
if (toggle) {
cmd |= SL11H_HCTLMASK_SEQ;
}
break;
case PID_IN:
cmd &= (SL11H_HCTLMASK_SEQ | SL11H_HCTLMASK_PREAMBLE);
cmd |= (SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENBLEP);
break;
default:
DBGERR ("ERR: SL11StartXaction: unknow pid = 0x%x\n", pid);
return 0;
}
setup_data[0] = SL11H_DATA_START;
setup_data[1] = len;
setup_data[2] = (((pid & 0x0F) << 4) | (epaddr & 0xF));
setup_data[3] = addr & 0x7F;
SL811BufWrite (hci, SL11H_BUFADDRREG, (__u8 *) & setup_data[0], 4);
SL811Write (hci, SL11H_HOSTCTLREG, cmd);
#if 0
/* The SL811 has a hardware flaw when hub devices sends out
* SE0 between packets. It has been found in a TI chipset and
* cypress hub chipset. It causes the SL811 to hang
* The workaround is to re-issue the preample again.
*/
if ((cmd & SL11H_HCTLMASK_PREAMBLE)) {
SL811Write (hci, SL11H_PIDEPREG_B, 0xc0);
SL811Write (hci, SL11H_HOSTCTLREG_B, 0x1); // send the premable
}
#endif
return 1;
}
//*****************************************************************************************
// usbXfer:
// successful transfer = return TRUE
// fail transfer = return FALSE
//*****************************************************************************************
u_int8 usbXfer(void)
{
u_int8 xferLen, data0, data1,cmd;
u_int8 intr,result,remainder,dataX,bufLen,addr,timeout;
//------------------------------------------------
// Default setting for usb trasnfer
//------------------------------------------------
dataX=timeout=0;
//result = SL811Read(EP0Status);
data0 = EP0_Buf; // DATA0 buffer address
data1 = data0 + ( u_int8)usbstack.wPayload; // DATA1 buffer address
bXXGFlags.DATA_STOP=FALSE;
bXXGFlags.TIMEOUT_ERR=FALSE;
//------------------------------------------------
// Define data transfer payload
//------------------------------------------------
if (usbstack.wLen >= usbstack.wPayload) // select proper data payload
xferLen = usbstack.wPayload; // limit to wPayload size
else // else take < payload len
xferLen = usbstack.wLen; //
// For IN token
if (usbstack.pid==PID_IN) // for current IN tokens
{ //
cmd = sDATA0_RD; // FS/FS on Hub, sync to sof
}
// For OUT token
else if(usbstack.pid==PID_OUT) // for OUT tokens
{
if(xferLen) // only when there are
{
//intr=usbstack.setup.wLength;
//usbstack.setup.wLength=WordSwap(usbstack.setup.wLength);
SL811BufWrite(data0,usbstack.buffer,xferLen); // data to transfer on USB
//usbstack.setup.wLength=intr;
}
cmd = sDATA0_WR; // FS/FS on Hub, sync to sof
// implement data toggle
bXXGFlags.bData1 = uDev.bData1[usbstack.endpoint];
uDev.bData1[usbstack.endpoint] = (uDev.bData1[usbstack.endpoint] ? 0 : 1); // DataToggle
if(bXXGFlags.bData1)
cmd |= 0x40; // Set Data1 bit in command
}
// For SETUP/OUT token
else // for current SETUP/OUT tokens
{
if(xferLen) // only when there are
{
intr=usbstack.setup.wLength;
usbstack.setup.wValue=usbstack.setup.wValue;
usbstack.setup.wIndex=usbstack.setup.wIndex;
usbstack.setup.wLength=usbstack.setup.wLength;
SL811BufWrite(data0,( u_int8 *)&usbstack.setup,xferLen); // data to transfer on USB
usbstack.setup.wLength=intr;
}
cmd = sDATA0_WR; // FS/FS on Hub, sync to sof
}
//------------------------------------------------
// For EP0's IN/OUT token data, start with DATA1
// Control Endpoint0's status stage.
// For data endpoint, IN/OUT data, start ????
//------------------------------------------------
if (usbstack.endpoint == 0 && usbstack.pid != PID_SETUP) // for Ep0's IN/OUT token
cmd |= 0x40; // always set DATA1
//------------------------------------------------
// Arming of USB data transfer for the first pkt
//------------------------------------------------
SL811Write(EP0Status,((usbstack.endpoint&0x0F)|usbstack.pid)); // PID + EP address
SL811Write(EP0Counter,usbstack.usbaddr); // USB address
SL811Write(EP0Address,data0); // buffer address, start with "data0"
SL811Write(EP0XferLen,xferLen); // data transfer length
SL811Write(IntStatus,INT_CLEAR); // clear interrupt status
SL811Write(EP0Control,cmd); // Enable ARM and USB transfer start here
//------------------------------------------------
// Main loop for completing a wLen data trasnfer
//------------------------------------------------
while(TRUE)
{
//---------------Wait for done interrupt------------------
while(TRUE) // always ensure requested device is
{ // inserted at all time, then you will
//intr=SL811Read(cSOFcnt);
//intr=SL811Read(IntEna);
intr = SL811Read(IntStatus);
// wait for interrupt to be done, and
if((intr & USB_DETECT) || (intr & INSERT_REMOVE)) // proceed to parse result from slave
{ // device.
bXXGFlags.DATA_STOP = TRUE; // if device is removed, set DATA_STOP
return FALSE; // flag true, so that main loop will
} // know this condition and exit gracefully
if(intr & USB_A_DONE)
break; // interrupt done !!!
}
SL811Write(IntStatus,INT_CLEAR); // clear interrupt status
result = SL811Read(EP0Status); // read EP0status register
remainder = SL811Read(EP0Counter); // remainder value in last pkt xfer
//-------------------------ACK----------------------------
if (result & EP0_ACK) // Transmission ACK
{
// SETUP TOKEN
if(usbstack.pid == PID_SETUP) // do nothing for SETUP/OUT token
break; // exit while(1) immediately
// OUT TOKEN
else if(usbstack.pid == PID_OUT)
break;
// IN TOKEN
else if(usbstack.pid == PID_IN)
{ // for IN token only
usbstack.wLen -= (WORD)xferLen; // update remainding wLen value
cmd ^= 0x40; // toggle DATA0/DATA1
dataX++; // point to next dataX
//------------------------------------------------
// If host requested for more data than the slave
// have, and if the slave's data len is a multiple
// of its endpoint payload size/last xferLen. Do
// not overwrite data in previous buffer.
//------------------------------------------------
if(remainder==xferLen) // empty data detected
bufLen = 0; // do not overwriten previous data
else // reset bufLen to zero
bufLen = xferLen; // update previous buffer length
//------------------------------------------------
// Arm for next data transfer when requested data
// length have not reach zero, i.e. wLen!=0, and
// last xferlen of data was completed, i.e.
// remainder is equal to zero, not a short pkt
//------------------------------------------------
if(!remainder && usbstack.wLen) // remainder==0 when last xferLen
{ // was all completed or wLen!=0
addr = (dataX & 1) ? data1:data0; // select next address for data
xferLen = (u_int8)(usbstack.wLen>=usbstack.wPayload) ? usbstack.wPayload:usbstack.wLen; // get data length required
//if (FULL_SPEED) // sync with SOF transfer
cmd |= 0x20; // always sync SOF when FS, regardless
SL811Write(EP0XferLen, xferLen); // select next xfer length
SL811Write(EP0Address, addr); // data buffer addr
SL811Write(IntStatus,INT_CLEAR); // is a LS is on Hub.
SL811Write(EP0Control,cmd); // Enable USB transfer and re-arm
}
//------------------------------------------------
// Copy last IN token data pkt from prev transfer
// Check if there was data available during the
// last data transfer
//------------------------------------------------
if(bufLen)
{
SL811BufRead(((dataX&1)?data0:data1), usbstack.buffer, bufLen);
usbstack.buffer += bufLen;
}
//------------------------------------------------
// Terminate on short packets, i.e. remainder!=0
// a short packet or empty data packet OR when
// requested data len have completed, i.e.wLen=0
// For a LOWSPEED device, the 1st device descp,
// wPayload is default to 64-u_int8, LS device will
// only send back a max of 8-u_int8 device descp,
// and host detect this as a short packet, and
// terminate with OUT status stage
//------------------------------------------------
if(remainder || !usbstack.wLen)
break;
}// PID IN
}
//-------------------------NAK----------------------------
if (result & EP0_NAK) // NAK Detected
{
if(usbstack.endpoint==0) // on ep0 during enumeration of LS device
{ // happen when slave is not fast enough,
SL811Write(IntStatus,INT_CLEAR); // clear interrupt status, need to
SL811Write(EP0Control,cmd); // re-arm and request for last cmd, IN token
result = 0; // respond to NAK status only
}
else // normal data endpoint, exit now !!! , non-zero ep
break; // main loop control the interval polling
}
//-----------------------TIMEOUT--------------------------
if (result & EP0_TIMEOUT) // TIMEOUT Detected
{
if(usbstack.endpoint==0) // happens when hub enumeration
{
if(++timeout >= TIMEOUT_RETRY)
{
timeout--;
break; // exit on the timeout detected
}
SL811Write(IntStatus,INT_CLEAR); // clear interrupt status, need to
SL811Write(EP0Control,cmd); // re-arm and request for last cmd again
}
else
{ // all other data endpoint, data transfer
bXXGFlags.TIMEOUT_ERR = TRUE; // failed, set flag to terminate transfer
break; // happens when data transfer on a device
} // through the hub
}
//-----------------------STALL----------------------------
if (result & EP0_STALL) // STALL detected
return TRUE; // for unsupported request.
//----------------------OVEFLOW---------------------------
if (result & EP0_OVERFLOW) // OVERFLOW detected
//result=result;
break;
//-----------------------ERROR----------------------------
if (result & EP0_ERROR) // ERROR detected
//result=result;
break;
} // end of While(1)
if (result & EP0_ACK) // on ACK transmission
return TRUE; // return OK
return FALSE; // fail transmission
}
