U-Boot. Исходные тексты команд: universe.c // SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003 Stefan Roese, stefan.roese@esd-electronics.com
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <asm/io.h>
#include <pci.h>
#include <universe.h>
#define PCI_VENDOR PCI_VENDOR_ID_TUNDRA
#define PCI_DEVICE PCI_DEVICE_ID_TUNDRA_CA91C042
typedef struct _UNI_DEV UNI_DEV;
struct _UNI_DEV {
int bus;
pci_dev_t busdevfn;
UNIVERSE *uregs;
unsigned int pci_bs;
};
static UNI_DEV *dev;
int universe_init(void)
{
int j, result;
pci_dev_t busdevfn;
unsigned int val;
busdevfn = pci_find_device(PCI_VENDOR, PCI_DEVICE, 0);
if (busdevfn == -1) {
puts("No Tundra Universe found!\n");
return -1;
}
/* Lets turn Latency off */
pci_write_config_dword(busdevfn, 0x0c, 0);
dev = malloc(sizeof(*dev));
if (NULL == dev) {
puts("UNIVERSE: No memory!\n");
result = -1;
goto break_20;
}
memset(dev, 0, sizeof(*dev));
dev->busdevfn = busdevfn;
pci_read_config_dword(busdevfn, PCI_BASE_ADDRESS_1, &val);
if (val & 1) {
pci_read_config_dword(busdevfn, PCI_BASE_ADDRESS_0, &val);
}
val &= ~0xf;
dev->uregs = (UNIVERSE *)val;
debug ("UNIVERSE-Base : %p\n", dev->uregs);
/* check mapping */
debug (" Read via mapping, PCI_ID = %08X\n", readl(&dev->uregs->pci_id));
if (((PCI_DEVICE <<16) | PCI_VENDOR) != readl(&dev->uregs->pci_id)) {
printf ("UNIVERSE: Cannot read PCI-ID via Mapping: %08x\n",
readl(&dev->uregs->pci_id));
result = -1;
goto break_30;
}
debug ("PCI_BS = %08X\n", readl(&dev->uregs->pci_bs));
dev->pci_bs = readl(&dev->uregs->pci_bs);
/* turn off windows */
for (j=0; j <4; j ++) {
writel(0x00800000, &dev->uregs->lsi[j].ctl);
writel(0x00800000, &dev->uregs->vsi[j].ctl);
}
/*
* Write to Misc Register
* Set VME Bus Time-out
* Arbitration Mode
* DTACK Enable
*/
writel(0x15040000 | (readl(&dev->uregs->misc_ctl) & 0x00020000), &dev->uregs->misc_ctl);
if (readl(&dev->uregs->misc_ctl) & 0x00020000) {
debug ("System Controller!\n"); /* test-only */
} else {
debug ("Not System Controller!\n"); /* test-only */
}
/*
* Lets turn off interrupts
*/
writel(0x00000000,&dev->uregs->lint_en); /* Disable interrupts in the Universe first */
writel(0x0000FFFF,&dev->uregs->lint_stat); /* Clear Any Pending Interrupts */
eieio();
writel(0x0000, &dev->uregs->lint_map0); /* Map all ints to 0 */
writel(0x0000, &dev->uregs->lint_map1); /* Map all ints to 0 */
eieio();
return 0;
break_30:
free(dev);
break_20:
return result;
}
/*
* Create pci slave window (access: pci -> vme)
*/
int universe_pci_slave_window(unsigned int pciAddr, unsigned int vmeAddr, int size, int vam, int pms, int vdw)
{
int result, i;
unsigned int ctl = 0;
if (NULL == dev) {
result = -1;
goto exit_10;
}
for (i = 0; i < 4; i++) {
if (0x00800000 == readl(&dev->uregs->lsi[i].ctl))
break;
}
if (i == 4) {
printf ("universe: No Image available\n");
result = -1;
goto exit_10;
}
debug ("universe: Using image %d\n", i);
writel(pciAddr , &dev->uregs->lsi[i].bs);
writel((pciAddr + size), &dev->uregs->lsi[i].bd);
writel((vmeAddr - pciAddr), &dev->uregs->lsi[i].to);
switch (vam & VME_AM_Axx) {
case VME_AM_A16:
ctl = 0x00000000;
break;
case VME_AM_A24:
ctl = 0x00010000;
break;
case VME_AM_A32:
ctl = 0x00020000;
break;
}
switch (vam & VME_AM_Mxx) {
case VME_AM_DATA:
ctl |= 0x00000000;
break;
case VME_AM_PROG:
ctl |= 0x00008000;
break;
}
if (vam & VME_AM_SUP) {
ctl |= 0x00001000;
}
switch (vdw & VME_FLAG_Dxx) {
case VME_FLAG_D8:
ctl |= 0x00000000;
break;
case VME_FLAG_D16:
ctl |= 0x00400000;
break;
case VME_FLAG_D32:
ctl |= 0x00800000;
break;
}
switch (pms & PCI_MS_Mxx) {
case PCI_MS_MEM:
ctl |= 0x00000000;
break;
case PCI_MS_IO:
ctl |= 0x00000001;
break;
case PCI_MS_CONFIG:
ctl |= 0x00000002;
break;
}
ctl |= 0x80000000; /* enable */
writel(ctl, &dev->uregs->lsi[i].ctl);
debug ("universe: window-addr=%p\n", &dev->uregs->lsi[i].ctl);
debug ("universe: pci slave window[%d] ctl=%08x\n", i, readl(&dev->uregs->lsi[i].ctl));
debug ("universe: pci slave window[%d] bs=%08x\n", i, readl(&dev->uregs->lsi[i].bs));
debug ("universe: pci slave window[%d] bd=%08x\n", i, readl(&dev->uregs->lsi[i].bd));
debug ("universe: pci slave window[%d] to=%08x\n", i, readl(&dev->uregs->lsi[i].to));
return 0;
exit_10:
return -result;
}
/*
* Create vme slave window (access: vme -> pci)
*/
int universe_vme_slave_window(unsigned int vmeAddr, unsigned int pciAddr, int size, int vam, int pms)
{
int result, i;
unsigned int ctl = 0;
if (NULL == dev) {
result = -1;
goto exit_10;
}
for (i = 0; i < 4; i++) {
if (0x00800000 == readl(&dev->uregs->vsi[i].ctl))
break;
}
if (i == 4) {
printf ("universe: No Image available\n");
result = -1;
goto exit_10;
}
debug ("universe: Using image %d\n", i);
writel(vmeAddr , &dev->uregs->vsi[i].bs);
writel((vmeAddr + size), &dev->uregs->vsi[i].bd);
writel((pciAddr - vmeAddr), &dev->uregs->vsi[i].to);
switch (vam & VME_AM_Axx) {
case VME_AM_A16:
ctl = 0x00000000;
break;
case VME_AM_A24:
ctl = 0x00010000;
break;
case VME_AM_A32:
ctl = 0x00020000;
break;
}
switch (vam & VME_AM_Mxx) {
case VME_AM_DATA:
ctl |= 0x00000000;
break;
case VME_AM_PROG:
ctl |= 0x00800000;
break;
}
if (vam & VME_AM_SUP) {
ctl |= 0x00100000;
}
switch (pms & PCI_MS_Mxx) {
case PCI_MS_MEM:
ctl |= 0x00000000;
break;
case PCI_MS_IO:
ctl |= 0x00000001;
break;
case PCI_MS_CONFIG:
ctl |= 0x00000002;
break;
}
ctl |= 0x80f00000; /* enable */
writel(ctl, &dev->uregs->vsi[i].ctl);
debug ("universe: window-addr=%p\n", &dev->uregs->vsi[i].ctl);
debug ("universe: vme slave window[%d] ctl=%08x\n", i, readl(&dev->uregs->vsi[i].ctl));
debug ("universe: vme slave window[%d] bs=%08x\n", i, readl(&dev->uregs->vsi[i].bs));
debug ("universe: vme slave window[%d] bd=%08x\n", i, readl(&dev->uregs->vsi[i].bd));
debug ("universe: vme slave window[%d] to=%08x\n", i, readl(&dev->uregs->vsi[i].to));
return 0;
exit_10:
return -result;
}
/*
* Tundra Universe configuration
*/
int do_universe(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
ulong addr1 = 0, addr2 = 0, size = 0, vam = 0, pms = 0, vdw = 0;
char cmd = 'x';
/* get parameter */
if (argc > 1)
cmd = argv[1][0];
if (argc > 2)
addr1 = hextoul(argv[2], NULL);
if (argc > 3)
addr2 = hextoul(argv[3], NULL);
if (argc > 4)
size = hextoul(argv[4], NULL);
if (argc > 5)
vam = hextoul(argv[5], NULL);
if (argc > 6)
pms = hextoul(argv[6], NULL);
if (argc > 7)
vdw = hextoul(argv[7], NULL);
switch (cmd) {
case 'i': /* init */
universe_init();
break;
case 'v': /* vme */
printf("Configuring Universe VME Slave Window (VME->PCI):\n");
printf(" vme=%08lx pci=%08lx size=%08lx vam=%02lx pms=%02lx\n",
addr1, addr2, size, vam, pms);
universe_vme_slave_window(addr1, addr2, size, vam, pms);
break;
case 'p': /* pci */
printf("Configuring Universe PCI Slave Window (PCI->VME):\n");
printf(" pci=%08lx vme=%08lx size=%08lx vam=%02lx pms=%02lx vdw=%02lx\n",
addr1, addr2, size, vam, pms, vdw);
universe_pci_slave_window(addr1, addr2, size, vam, pms, vdw);
break;
default:
printf("Universe command %s not supported!\n", argv[1]);
}
return 0;
}
U_BOOT_CMD(
universe, 8, 1, do_universe,
"initialize and configure Turndra Universe",
"init\n"
" - initialize universe\n"
"universe vme [vme_addr] [pci_addr] [size] [vam] [pms]\n"
" - create vme slave window (access: vme->pci)\n"
"universe pci [pci_addr] [vme_addr] [size] [vam] [pms] [vdw]\n"
" - create pci slave window (access: pci->vme)\n"
" [vam] = VMEbus Address-Modifier: 01 -> A16 Address Space\n"
" 02 -> A24 Address Space\n"
" 03 -> A32 Address Space\n"
" 04 -> Supervisor AM Code\n"
" 10 -> Data AM Code\n"
" 20 -> Program AM Code\n"
" [pms] = PCI Memory Space: 01 -> Memory Space\n"
" 02 -> I/O Space\n"
" 03 -> Configuration Space\n"
" [vdw] = VMEbus Maximum Datawidth: 01 -> D8 Data Width\n"
" 02 -> D16 Data Width\n"
" 03 -> D32 Data Width"
);
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