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|
/*
* AMBA Plag & Play Bus Driver
*
* This driver hook performs bus scanning.
*
* COPYRIGHT (c) 2004.
* Gaisler Research
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp.h>
#include <rtems/bspIo.h>
#include <ambapp.h>
#define amba_insert_device(tab, address) \
{ \
if (*(address)) \
{ \
(tab)->addr[(tab)->devnr] = (address); \
(tab)->devnr ++; \
} \
} while(0)
#define amba_insert_apb_device(tab, address, apbmst) \
{ \
if (*(address)) \
{ \
(tab)->addr[(tab)->devnr] = (address); \
(tab)->apbmst[(tab)->devnr] = (apbmst); \
(tab)->devnr ++; \
} \
} while(0)
static unsigned int
addr_from (struct amba_mmap *mmaps, unsigned int address)
{
/* no translation? */
if (!mmaps)
return address;
while (mmaps->size) {
if ((address >= mmaps->remote_amba_adr)
&& (address <= (mmaps->remote_amba_adr + (mmaps->size - 1)))) {
return (address - mmaps->remote_amba_adr) + mmaps->cpu_adr;
}
mmaps++;
}
return 1;
}
void
amba_scan (amba_confarea_type * amba_conf, unsigned int ioarea,
struct amba_mmap *mmaps)
{
unsigned int *cfg_area; /* address to configuration area */
unsigned int mbar, conf, custom;
int i, j;
unsigned int apbmst;
int maxloops = amba_conf->notroot ? 16 : 64; /* scan first bus for 64 devices, rest for 16 devices */
amba_conf->ahbmst.devnr = 0;
amba_conf->ahbslv.devnr = 0;
amba_conf->apbslv.devnr = 0;
cfg_area = (unsigned int *) (ioarea | AMBA_CONF_AREA);
amba_conf->ioarea = ioarea;
amba_conf->mmaps = mmaps;
for (i = 0; i < maxloops; i++) {
amba_insert_device (&amba_conf->ahbmst, cfg_area);
cfg_area += AMBA_AHB_CONF_WORDS;
}
cfg_area =
(unsigned int *) (ioarea | AMBA_CONF_AREA | AMBA_AHB_SLAVE_CONF_AREA);
for (i = 0; i < maxloops; i++) {
amba_insert_device (&amba_conf->ahbslv, cfg_area);
cfg_area += AMBA_AHB_CONF_WORDS;
}
for (i = 0; i < amba_conf->ahbslv.devnr; i++){
conf = amba_get_confword(amba_conf->ahbslv, i, 0);
mbar = amba_ahb_get_membar(amba_conf->ahbslv, i, 0);
if ( (amba_vendor(conf) == VENDOR_GAISLER) && (amba_device(conf) == GAISLER_AHB2AHB) ){
/* Found AHB->AHB bus bridge, scan it if more free amba_confarea_type:s available
* Custom config 1 contain ioarea.
*/
custom = amba_ahb_get_custom(amba_conf->ahbslv,i,1);
if ( amba_ver(conf) && amba_conf->next ){
amba_conf->next->notroot = 1;
amba_scan(amba_conf->next,custom,mmaps);
}
}else if ((amba_vendor(conf) == VENDOR_GAISLER) && (amba_device(conf) == GAISLER_APBMST))
{
apbmst = amba_membar_start(mbar);
if ( (apbmst=addr_from(mmaps,apbmst)) == 1 )
continue; /* no available memory translation available, will not be able to access
* Plug&Play information for this AHB/APB bridge. Skip it.
*/
cfg_area = (unsigned int *)( apbmst | AMBA_CONF_AREA);
for (j=0; (amba_conf->apbslv.devnr<AMBA_APB_SLAVES) && (j<AMBA_APB_SLAVES); j++){
amba_insert_apb_device(&amba_conf->apbslv, cfg_area, apbmst);
cfg_area += AMBA_APB_CONF_WORDS;
}
}
}
}
void
amba_print_dev(int devno, unsigned int conf){
int irq = amba_irq(conf);
if ( irq > 0 ){
printk("%x.%x.%x: irq %d\n",devno,amba_vendor(conf),amba_device(conf),irq);
}else{
printk("%x.%x.%x: no irq\n",devno,amba_vendor(conf),amba_device(conf));
}
}
void
amba_apb_print_dev(int devno, unsigned int conf, unsigned int address){
int irq = amba_irq(conf);
if ( irq > 0 ){
printk("%x.%x.%x: irq %d, apb: 0x%lx\n",devno,amba_vendor(conf),amba_device(conf),irq,address);
}else{
printk("%x.%x.%x: no irq, apb: 0x%lx\n",devno,amba_vendor(conf),amba_device(conf),address);
}
}
/* Print AMBA Plug&Play info on terminal */
void
amba_print_conf (amba_confarea_type * amba_conf)
{
int i,base=0;
unsigned int conf, iobar, address;
unsigned int apbmst;
/* print all ahb masters */
printk("--- AMBA AHB Masters ---\n");
for(i=0; i<amba_conf->ahbmst.devnr; i++){
conf = amba_get_confword(amba_conf->ahbmst, i, 0);
amba_print_dev(i,conf);
}
/* print all ahb slaves */
printk("--- AMBA AHB Slaves ---\n");
for(i=0; i<amba_conf->ahbslv.devnr; i++){
conf = amba_get_confword(amba_conf->ahbslv, i, 0);
amba_print_dev(i,conf);
}
/* print all apb slaves */
apbmst = 0;
for(i=0; i<amba_conf->apbslv.devnr; i++){
if ( apbmst != amba_conf->apbslv.apbmst[i] ){
apbmst = amba_conf->apbslv.apbmst[i];
printk("--- AMBA APB Slaves on 0x%x ---\n",apbmst);
base=i;
}
conf = amba_get_confword(amba_conf->apbslv, i, 0);
iobar = amba_apb_get_membar(amba_conf->apbslv, i);
address = amba_iobar_start(amba_conf->apbslv.apbmst[i], iobar);
amba_apb_print_dev(i-base,conf,address);
}
}
/**** APB Slaves ****/
/* Return number of APB Slave devices which has given vendor and device */
int
amba_get_number_apbslv_devices (amba_confarea_type * amba_conf, int vendor,
int device)
{
unsigned int conf;
int cnt, i;
for (cnt = i = 0; i < amba_conf->apbslv.devnr; i++) {
conf = amba_get_confword (amba_conf->apbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device))
cnt++;
}
return cnt;
}
/* Get First APB Slave device of this vendor&device id */
int
amba_find_apbslv (amba_confarea_type * amba_conf, int vendor, int device,
amba_apb_device * dev)
{
unsigned int conf, iobar;
int i;
for (i = 0; i < amba_conf->apbslv.devnr; i++) {
conf = amba_get_confword (amba_conf->apbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
iobar = amba_apb_get_membar (amba_conf->apbslv, i);
dev->start = amba_iobar_start (amba_conf->apbslv.apbmst[i], iobar);
dev->irq = amba_irq (conf);
return 1;
}
}
return 0;
}
/* Get APB Slave device of this vendor&device id. (setting nr to 0 is eqivalent to calling amba_find_apbslv() ) */
int
amba_find_next_apbslv (amba_confarea_type * amba_conf, int vendor, int device,
amba_apb_device * dev, int index)
{
unsigned int conf, iobar;
int cnt, i;
for (cnt = i = 0; i < amba_conf->apbslv.devnr; i++) {
conf = amba_get_confword (amba_conf->apbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
if (cnt == index) {
/* found device */
iobar = amba_apb_get_membar (amba_conf->apbslv, i);
dev->start = amba_iobar_start (amba_conf->apbslv.apbmst[i], iobar);
dev->irq = amba_irq (conf);
return 1;
}
cnt++;
}
}
return 0;
}
/* Get first nr APB Slave devices, put them into dev (which is an array of nr length) */
int
amba_find_apbslvs (amba_confarea_type * amba_conf, int vendor, int device,
amba_apb_device * devs, int maxno)
{
unsigned int conf, iobar;
int cnt, i;
for (cnt = i = 0; (i < amba_conf->apbslv.devnr) && (cnt < maxno); i++) {
conf = amba_get_confword (amba_conf->apbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
/* found device */
iobar = amba_apb_get_membar (amba_conf->apbslv, i);
devs[cnt].start = amba_iobar_start (amba_conf->apbslv.apbmst[i], iobar);
devs[cnt].irq = amba_irq (conf);
cnt++;
}
}
return cnt;
}
/***** AHB SLAVES *****/
/* Return number of AHB Slave devices which has given vendor and device */
int
amba_get_number_ahbslv_devices (amba_confarea_type * amba_conf, int vendor,
int device)
{
unsigned int conf;
int cnt, i;
for (cnt = i = 0; i < amba_conf->ahbslv.devnr; i++) {
conf = amba_get_confword (amba_conf->ahbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device))
cnt++;
}
return cnt;
}
/* Get First AHB Slave device of this vendor&device id */
int
amba_find_ahbslv (amba_confarea_type * amba_conf, int vendor, int device,
amba_ahb_device * dev)
{
unsigned int conf, mbar, addr;
int j, i;
for (i = 0; i < amba_conf->ahbslv.devnr; i++) {
conf = amba_get_confword (amba_conf->ahbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
for (j = 0; j < 4; j++) {
mbar = amba_ahb_get_membar (amba_conf->ahbslv, i, j);
addr = amba_membar_start (mbar);
if (amba_membar_type (mbar) == AMBA_TYPE_AHBIO) {
addr = AMBA_TYPE_AHBIO_ADDR (addr, amba_conf->ioarea);
} else { /* convert address if needed */
if ((addr = addr_from (amba_conf->mmaps, addr)) == 1) {
addr = 0; /* no available memory translation available, will not be able to access
* Plug&Play information for this AHB address. Skip it.
*/
}
}
dev->start[j] = addr;
}
dev->irq = amba_irq (conf);
dev->ver = amba_ver (conf);
return 1;
}
}
return 0;
}
/* Get AHB Slave device of this vendor&device id. (setting nr to 0 is eqivalent to calling amba_find_ahbslv() ) */
int
amba_find_next_ahbslv (amba_confarea_type * amba_conf, int vendor, int device,
amba_ahb_device * dev, int index)
{
unsigned int conf, mbar, addr;
int i, j, cnt;
for (cnt = i = 0; i < amba_conf->ahbslv.devnr; i++) {
conf = amba_get_confword (amba_conf->ahbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
if (cnt == index) {
for (j = 0; j < 4; j++) {
mbar = amba_ahb_get_membar (amba_conf->ahbslv, i, j);
addr = amba_membar_start (mbar);
if (amba_membar_type (mbar) == AMBA_TYPE_AHBIO) {
addr = AMBA_TYPE_AHBIO_ADDR (addr, amba_conf->ioarea);
} else {
/* convert address if needed */
if ((addr = addr_from (amba_conf->mmaps, addr)) == 1) {
addr = 0; /* no available memory translation available, will not be able to access
* Plug&Play information for this AHB address. Skip it.
*/
}
}
dev->start[j] = addr;
}
dev->irq = amba_irq (conf);
dev->ver = amba_ver (conf);
return 1;
}
cnt++;
}
}
return 0;
}
/* Get first nr AHB Slave devices, put them into dev (which is an array of nr length) */
int
amba_find_ahbslvs (amba_confarea_type * amba_conf, int vendor, int device,
amba_ahb_device * devs, int maxno)
{
unsigned int conf, mbar, addr;
int i, j, cnt;
for (cnt = i = 0; (i < amba_conf->ahbslv.devnr) && (maxno < cnt); i++) {
conf = amba_get_confword (amba_conf->ahbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
for (j = 0; j < 4; j++) {
mbar = amba_ahb_get_membar (amba_conf->ahbslv, i, j);
addr = amba_membar_start (mbar);
if (amba_membar_type (mbar) == AMBA_TYPE_AHBIO) {
addr = AMBA_TYPE_AHBIO_ADDR (addr, amba_conf->ioarea);
} else {
/* convert address if needed */
if ((addr = addr_from (amba_conf->mmaps, addr)) == 1) {
addr = 0; /* no available memory translation available, will not be able to access
* Plug&Play information for this AHB address. Skip it.
*/
}
}
devs[cnt].start[j] = addr;
}
devs[cnt].irq = amba_irq (conf);
devs[cnt].ver = amba_ver (conf);
cnt++;
}
}
return cnt;
}
/***** AHB Masters *****/
/* Return number of AHB Slave devices which has given vendor and device */
int
amba_get_number_ahbmst_devices (amba_confarea_type * amba_conf, int vendor,
int device)
{
unsigned int conf;
int cnt, i;
for (cnt = i = 0; i < amba_conf->ahbmst.devnr; i++) {
conf = amba_get_confword (amba_conf->ahbmst, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device))
cnt++;
}
return cnt;
}
/* Get First AHB Slave device of this vendor&device id */
int
amba_find_ahbmst (amba_confarea_type * amba_conf, int vendor, int device,
amba_ahb_device * dev)
{
unsigned int conf, mbar, addr;
int j, i;
for (i = 0; i < amba_conf->ahbmst.devnr; i++) {
conf = amba_get_confword (amba_conf->ahbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
for (j = 0; j < 4; j++) {
mbar = amba_ahb_get_membar (amba_conf->ahbmst, i, j);
addr = amba_membar_start (mbar);
if (amba_membar_type (mbar) == AMBA_TYPE_AHBIO) {
addr = AMBA_TYPE_AHBIO_ADDR (addr, amba_conf->ioarea);
} else {
/* convert address if needed */
if ((addr = addr_from (amba_conf->mmaps, addr)) == 1) {
addr = 0; /* no available memory translation available, will not be able to access
* Plug&Play information for this AHB address. Skip it.
*/
}
}
dev->start[j] = addr;
}
dev->irq = amba_irq (conf);
dev->ver = amba_ver (conf);
return 1;
}
}
return 0;
}
/* Get AHB Slave device of this vendor&device id. (setting nr to 0 is eqivalent to calling amba_find_ahbslv() ) */
int
amba_find_next_ahbmst (amba_confarea_type * amba_conf, int vendor, int device,
amba_ahb_device * dev, int index)
{
unsigned int conf, mbar, addr;
int i, j, cnt;
for (cnt = i = 0; i < amba_conf->ahbmst.devnr; i++) {
conf = amba_get_confword (amba_conf->ahbmst, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
if (cnt == index) {
for (j = 0; j < 4; j++) {
mbar = amba_ahb_get_membar (amba_conf->ahbmst, i, j);
addr = amba_membar_start (mbar);
if (amba_membar_type (mbar) == AMBA_TYPE_AHBIO) {
addr = AMBA_TYPE_AHBIO_ADDR (addr, amba_conf->ioarea);
} else {
/* convert address if needed */
if ((addr = addr_from (amba_conf->mmaps, addr)) == 1) {
addr = 0; /* no available memory translation available, will not be able to access
* Plug&Play information for this AHB address. Skip it.
*/
}
}
dev->start[j] = addr;
}
dev->irq = amba_irq (conf);
dev->ver = amba_ver (conf);
return 1;
}
cnt++;
}
}
return 0;
}
/* Get first nr AHB Slave devices, put them into dev (which is an array of nr length) */
int
amba_find_ahbmsts (amba_confarea_type * amba_conf, int vendor, int device,
amba_ahb_device * devs, int maxno)
{
unsigned int conf, mbar, addr;
int i, j, cnt;
for (cnt = i = 0; (i < amba_conf->ahbmst.devnr) && (maxno < cnt); i++) {
conf = amba_get_confword (amba_conf->ahbslv, i, 0);
if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) {
for (j = 0; j < 4; j++) {
mbar = amba_ahb_get_membar (amba_conf->ahbmst, i, j);
addr = amba_membar_start (mbar);
if (amba_membar_type (mbar) == AMBA_TYPE_AHBIO) {
addr = AMBA_TYPE_AHBIO_ADDR (addr, amba_conf->ioarea);
} else {
/* convert address if needed */
if ((addr = addr_from (amba_conf->mmaps, addr)) == 1) {
addr = 0; /* no available memory translation available, will not be able to access
* Plug&Play information for this AHB address. Skip it.
*/
}
}
devs[cnt].start[j] = addr;
}
devs[cnt].irq = amba_irq (conf);
devs[cnt].ver = amba_ver (conf);
cnt++;
}
}
return cnt;
}
|
