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*******************************************************************************/
#include "mvPex.h"
/* #define MV_DEBUG */
/* defines */
#ifdef MV_DEBUG
#define DB(x) x
#else
#define DB(x)
#endif
/* locals */
typedef struct {
MV_U32 data;
MV_U32 mask;
} PEX_HEADER_DATA;
/* local function forwad decleration */
MV_U32 mvPexHwConfigRead(MV_U32 pexIf, MV_U32 bus, MV_U32 dev, MV_U32 func, MV_U32 regOff);
MV_STATUS mvPexHwConfigWrite(MV_U32 pexIf, MV_U32 bus, MV_U32 dev, MV_U32 func, MV_U32 regOff, MV_U32 data);
void resetPexConfig(MV_U32 pexIf, MV_U32 bus, MV_U32 dev);
PEX_HEADER_DATA configHdr[16] = {
{0x888811ab, 0x00000000}, /*[device ID, vendor ID] */
{0x00100007, 0x0000ffff}, /*[status register, command register] */
{0x0604000e, 0x00000000}, /*[programming interface, sub class code, class code, revision ID] */
{0x00010008, 0x00000000}, /*[BIST, header type, latency time, cache line] */
{0x00000000, 0x00000000}, /*[base address 0] */
{0x00000000, 0x00000000}, /*[base address 1] */
{0x00000000, 0x00ffffff}, /*[secondary latency timersubordinate bus number,
secondary bus number, primary bus number] */
{0x0000f101, 0x00000000}, /*[secondary status ,IO limit, IO base] */
{0x9ff0a000, 0x00000000}, /*[memory limit, memory base] */
{0x0001fff1, 0x00000000}, /*[prefetch memory limit, prefetch memory base] */
{0xffffffff, 0x00000000}, /*[prefetch memory base upper] */
{0x00000000, 0x00000000}, /*[prefetch memory limit upper] */
{0xeffff000, 0x00000000}, /*[IO limit upper 16 bits, IO base upper 16 bits] */
{0x00000000, 0x00000000}, /*[reserved, capability pointer] */
{0x00000000, 0x00000000}, /*[expansion ROM base address] */
{0x00000000, 0x000000FF}, /*[bridge control, interrupt pin, interrupt line] */
};
#define HEADER_WRITE(data, offset) configHdr[offset/4].data = \
((configHdr[offset/4].data & ~configHdr[offset/4].mask) | \
(data & configHdr[offset/4].mask))
#define HEADER_READ(offset) configHdr[offset/4].data
/*******************************************************************************
* mvVrtBrgPexInit - Initialize PEX interfaces
*
* Description:
* This function is responsible of intialization of the Pex Interface , It
* configure the Pex Bars and Windows in the following manner:
*
* Assumptions :
* Bar0 is always internal registers bar
* Bar1 is always the DRAM bar
* Bar2 is always the Device bar
*
* 1) Sets the Internal registers bar base by obtaining the base from
* the CPU Interface
* 2) Sets the DRAM bar base and size by getting the base and size from
* the CPU Interface when the size is the sum of all enabled DRAM
* chip selects and the base is the base of CS0 .
* 3) Sets the Device bar base and size by getting these values from the
* CPU Interface when the base is the base of the lowest base of the
* Device chip selects, and the
*
* INPUT:
* pexIf - PEX interface number.
*
* OUTPUT:
* None.
*
* RETURN:
* MV_OK if function success otherwise MV_ERROR or MV_BAD_PARAM
*
*******************************************************************************/
MV_STATUS mvPexVrtBrgInit(MV_U32 pexIf)
{
/* reset PEX tree to recover previous U-boot/Boot configurations */
MV_U32 localBus = mvPexLocalBusNumGet(pexIf);
resetPexConfig(pexIf, localBus, 1);
return MV_OK;
}
MV_U32 mvPexVrtBrgConfigRead(MV_U32 pexIf, MV_U32 bus, MV_U32 dev, MV_U32 func, MV_U32 regOff)
{
MV_U32 localBus = mvPexLocalBusNumGet(pexIf);
MV_U32 localDev = mvPexLocalDevNumGet(pexIf);
MV_U32 val;
if (bus == localBus) {
if (dev > 1) {
/* on the local device allow only device #0 & #1 */
return 0xffffffff;
} else if (dev == localDev) {
/* read the memory controller registers */
return mvPexHwConfigRead(pexIf, bus, dev, func, regOff);
} else {
/* access the virtual brg header */
return HEADER_READ(regOff);
}
} else if (bus == (localBus + 1)) {
/* access the device behind the virtual bridge */
if ((dev == localDev) || (dev > 1)) {
return 0xffffffff;
} else {
/* access the device behind the virtual bridge, in this case
* change the bus number to the local bus number in order to
* generate type 0 config cycle
*/
mvPexLocalBusNumSet(pexIf, bus);
mvPexLocalDevNumSet(pexIf, 1);
val = mvPexHwConfigRead(pexIf, bus, 0, func, regOff);
mvPexLocalBusNumSet(pexIf, localBus);
mvPexLocalDevNumSet(pexIf, localDev);
return val;
}
}
/* for all other devices use the HW function to get the
* requested registers
*/
mvPexLocalDevNumSet(pexIf, 1);
val = mvPexHwConfigRead(pexIf, bus, dev, func, regOff);
mvPexLocalDevNumSet(pexIf, localDev);
return val;
}
MV_STATUS mvPexVrtBrgConfigWrite(MV_U32 pexIf, MV_U32 bus, MV_U32 dev, MV_U32 func, MV_U32 regOff, MV_U32 data)
{
MV_U32 localBus = mvPexLocalBusNumGet(pexIf);
MV_U32 localDev = mvPexLocalDevNumGet(pexIf);
MV_STATUS status;
if (bus == localBus) {
if (dev > 1) {
/* on the local device allow only device #0 & #1 */
return MV_ERROR;
} else if (dev == localDev) {
/* read the memory controller registers */
return mvPexHwConfigWrite(pexIf, bus, dev, func, regOff, data);
} else {
/* access the virtual brg header */
HEADER_WRITE(data, regOff);
return MV_OK;
}
} else if (bus == (localBus + 1)) {
/* access the device behind the virtual bridge */
if ((dev == localDev) || (dev > 1)) {
return MV_ERROR;
} else {
/* access the device behind the virtual bridge, in this case
* change the bus number to the local bus number in order to
* generate type 0 config cycle
*/
/* return mvPexHwConfigWrite (pexIf, localBus, dev, func, regOff, data); */
mvPexLocalBusNumSet(pexIf, bus);
mvPexLocalDevNumSet(pexIf, 1);
status = mvPexHwConfigWrite(pexIf, bus, 0, func, regOff, data);
mvPexLocalBusNumSet(pexIf, localBus);
mvPexLocalDevNumSet(pexIf, localDev);
return status;
}
}
/* for all other devices use the HW function to get the
* requested registers
*/
mvPexLocalDevNumSet(pexIf, 1);
status = mvPexHwConfigWrite(pexIf, bus, dev, func, regOff, data);
mvPexLocalDevNumSet(pexIf, localDev);
return status;
}
void resetPexConfig(MV_U32 pexIf, MV_U32 bus, MV_U32 dev)
{
MV_U32 tData;
MV_U32 i;
/* restore the PEX configuration to initialization state */
/* in case PEX P2P call recursive and reset config */
tData = mvPexHwConfigRead(pexIf, bus, dev, 0x0, 0x0);
if (tData != 0xffffffff) {
/* agent had been found - check whether P2P */
tData = mvPexHwConfigRead(pexIf, bus, dev, 0x0, 0x8);
if ((tData & 0xffff0000) == 0x06040000) { /* P2P */
/* get the sec bus and the subordinate */
MV_U32 secBus;
tData = mvPexHwConfigRead(pexIf, bus, dev, 0x0, 0x18);
secBus = ((tData >> 8) & 0xff);
/* now scan on sec bus */
for (i = 0; i < 0xff; i++)
resetPexConfig(pexIf, secBus, i);
/* now reset this device */
DB(mvOsPrintf("Reset bus %d dev %d\n", bus, dev));
mvPexHwConfigWrite(pexIf, bus, dev, 0x0, 0x18, 0x0);
DB(mvOsPrintf("Reset bus %d dev %d\n", bus, dev));
}
}
}