upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
380 lines
10 KiB
380 lines
10 KiB
/*
|
|
* arch/ppc/kernel/pci_auto.c
|
|
*
|
|
* PCI autoconfiguration library
|
|
*
|
|
* Author: Matt Porter <mporter@mvista.com>
|
|
*
|
|
* Copyright 2000 MontaVista Software Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <common.h>
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
#include <pci.h>
|
|
|
|
#undef DEBUG
|
|
#ifdef DEBUG
|
|
#define DEBUGF(x...) printf(x)
|
|
#else
|
|
#define DEBUGF(x...)
|
|
#endif /* DEBUG */
|
|
|
|
#define PCIAUTO_IDE_MODE_MASK 0x05
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
void pciauto_region_init(struct pci_region* res)
|
|
{
|
|
res->bus_lower = res->bus_start;
|
|
}
|
|
|
|
void pciauto_region_align(struct pci_region *res, unsigned long size)
|
|
{
|
|
res->bus_lower = ((res->bus_lower - 1) | (size - 1)) + 1;
|
|
}
|
|
|
|
int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned int *bar)
|
|
{
|
|
unsigned long addr;
|
|
|
|
if (!res) {
|
|
DEBUGF("No resource");
|
|
goto error;
|
|
}
|
|
|
|
addr = ((res->bus_lower - 1) | (size - 1)) + 1;
|
|
|
|
if (addr - res->bus_start + size > res->size) {
|
|
DEBUGF("No room in resource");
|
|
goto error;
|
|
}
|
|
|
|
res->bus_lower = addr + size;
|
|
|
|
DEBUGF("address=0x%lx", addr);
|
|
|
|
*bar = addr;
|
|
return 0;
|
|
|
|
error:
|
|
*bar = 0xffffffff;
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
void pciauto_setup_device(struct pci_controller *hose,
|
|
pci_dev_t dev, int bars_num,
|
|
struct pci_region *mem,
|
|
struct pci_region *prefetch,
|
|
struct pci_region *io)
|
|
{
|
|
unsigned int bar_value, bar_response, bar_size;
|
|
unsigned int cmdstat = 0;
|
|
struct pci_region *bar_res;
|
|
int bar, bar_nr = 0;
|
|
int found_mem64 = 0;
|
|
|
|
pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &cmdstat);
|
|
cmdstat = (cmdstat & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) | PCI_COMMAND_MASTER;
|
|
|
|
for (bar = PCI_BASE_ADDRESS_0; bar <= PCI_BASE_ADDRESS_0 + (bars_num*4); bar += 4) {
|
|
/* Tickle the BAR and get the response */
|
|
pci_hose_write_config_dword(hose, dev, bar, 0xffffffff);
|
|
pci_hose_read_config_dword(hose, dev, bar, &bar_response);
|
|
|
|
/* If BAR is not implemented go to the next BAR */
|
|
if (!bar_response)
|
|
continue;
|
|
|
|
found_mem64 = 0;
|
|
|
|
/* Check the BAR type and set our address mask */
|
|
if (bar_response & PCI_BASE_ADDRESS_SPACE) {
|
|
bar_size = ~(bar_response & PCI_BASE_ADDRESS_IO_MASK) + 1;
|
|
bar_res = io;
|
|
|
|
DEBUGF("PCI Autoconfig: BAR %d, I/O, size=0x%x, ", bar_nr, bar_size);
|
|
} else {
|
|
if ( (bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
|
|
PCI_BASE_ADDRESS_MEM_TYPE_64)
|
|
found_mem64 = 1;
|
|
|
|
bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
|
|
if (prefetch && (bar_response & PCI_BASE_ADDRESS_MEM_PREFETCH))
|
|
bar_res = prefetch;
|
|
else
|
|
bar_res = mem;
|
|
|
|
DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%x, ", bar_nr, bar_size);
|
|
}
|
|
|
|
if (pciauto_region_allocate(bar_res, bar_size, &bar_value) == 0) {
|
|
/* Write it out and update our limit */
|
|
pci_hose_write_config_dword(hose, dev, bar, bar_value);
|
|
|
|
/*
|
|
* If we are a 64-bit decoder then increment to the
|
|
* upper 32 bits of the bar and force it to locate
|
|
* in the lower 4GB of memory.
|
|
*/
|
|
if (found_mem64) {
|
|
bar += 4;
|
|
pci_hose_write_config_dword(hose, dev, bar, 0x00000000);
|
|
}
|
|
|
|
cmdstat |= (bar_response & PCI_BASE_ADDRESS_SPACE) ?
|
|
PCI_COMMAND_IO : PCI_COMMAND_MEMORY;
|
|
}
|
|
|
|
DEBUGF("\n");
|
|
|
|
bar_nr++;
|
|
}
|
|
|
|
pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat);
|
|
pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
|
|
pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
|
|
}
|
|
|
|
static void pciauto_prescan_setup_bridge(struct pci_controller *hose,
|
|
pci_dev_t dev, int sub_bus)
|
|
{
|
|
struct pci_region *pci_mem = hose->pci_mem;
|
|
struct pci_region *pci_prefetch = hose->pci_prefetch;
|
|
struct pci_region *pci_io = hose->pci_io;
|
|
unsigned int cmdstat;
|
|
|
|
pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &cmdstat);
|
|
|
|
/* Configure bus number registers */
|
|
pci_hose_write_config_byte(hose, dev, PCI_PRIMARY_BUS, PCI_BUS(dev));
|
|
pci_hose_write_config_byte(hose, dev, PCI_SECONDARY_BUS, sub_bus);
|
|
pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, 0xff);
|
|
|
|
if (pci_mem) {
|
|
/* Round memory allocator to 1MB boundary */
|
|
pciauto_region_align(pci_mem, 0x100000);
|
|
|
|
/* Set up memory and I/O filter limits, assume 32-bit I/O space */
|
|
pci_hose_write_config_word(hose, dev, PCI_MEMORY_BASE,
|
|
(pci_mem->bus_lower & 0xfff00000) >> 16);
|
|
|
|
cmdstat |= PCI_COMMAND_MEMORY;
|
|
}
|
|
|
|
if (pci_prefetch) {
|
|
/* Round memory allocator to 1MB boundary */
|
|
pciauto_region_align(pci_prefetch, 0x100000);
|
|
|
|
/* Set up memory and I/O filter limits, assume 32-bit I/O space */
|
|
pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE,
|
|
(pci_prefetch->bus_lower & 0xfff00000) >> 16);
|
|
|
|
cmdstat |= PCI_COMMAND_MEMORY;
|
|
} else {
|
|
/* We don't support prefetchable memory for now, so disable */
|
|
pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE, 0x1000);
|
|
pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT, 0x0);
|
|
}
|
|
|
|
if (pci_io) {
|
|
/* Round I/O allocator to 4KB boundary */
|
|
pciauto_region_align(pci_io, 0x1000);
|
|
|
|
pci_hose_write_config_byte(hose, dev, PCI_IO_BASE,
|
|
(pci_io->bus_lower & 0x0000f000) >> 8);
|
|
pci_hose_write_config_word(hose, dev, PCI_IO_BASE_UPPER16,
|
|
(pci_io->bus_lower & 0xffff0000) >> 16);
|
|
|
|
cmdstat |= PCI_COMMAND_IO;
|
|
}
|
|
|
|
/* Enable memory and I/O accesses, enable bus master */
|
|
pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat | PCI_COMMAND_MASTER);
|
|
}
|
|
|
|
static void pciauto_postscan_setup_bridge(struct pci_controller *hose,
|
|
pci_dev_t dev, int sub_bus)
|
|
{
|
|
struct pci_region *pci_mem = hose->pci_mem;
|
|
struct pci_region *pci_prefetch = hose->pci_prefetch;
|
|
struct pci_region *pci_io = hose->pci_io;
|
|
|
|
/* Configure bus number registers */
|
|
pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, sub_bus);
|
|
|
|
if (pci_mem) {
|
|
/* Round memory allocator to 1MB boundary */
|
|
pciauto_region_align(pci_mem, 0x100000);
|
|
|
|
pci_hose_write_config_word(hose, dev, PCI_MEMORY_LIMIT,
|
|
(pci_mem->bus_lower-1) >> 16);
|
|
}
|
|
|
|
if (pci_prefetch) {
|
|
/* Round memory allocator to 1MB boundary */
|
|
pciauto_region_align(pci_prefetch, 0x100000);
|
|
|
|
pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT,
|
|
(pci_prefetch->bus_lower-1) >> 16);
|
|
}
|
|
|
|
if (pci_io) {
|
|
/* Round I/O allocator to 4KB boundary */
|
|
pciauto_region_align(pci_io, 0x1000);
|
|
|
|
pci_hose_write_config_byte(hose, dev, PCI_IO_LIMIT,
|
|
((pci_io->bus_lower-1) & 0x0000f000) >> 8);
|
|
pci_hose_write_config_word(hose, dev, PCI_IO_LIMIT_UPPER16,
|
|
((pci_io->bus_lower-1) & 0xffff0000) >> 16);
|
|
}
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
void pciauto_config_init(struct pci_controller *hose)
|
|
{
|
|
int i;
|
|
|
|
hose->pci_io = hose->pci_mem = NULL;
|
|
|
|
for (i=0; i<hose->region_count; i++) {
|
|
switch(hose->regions[i].flags) {
|
|
case PCI_REGION_IO:
|
|
if (!hose->pci_io ||
|
|
hose->pci_io->size < hose->regions[i].size)
|
|
hose->pci_io = hose->regions + i;
|
|
break;
|
|
case PCI_REGION_MEM:
|
|
if (!hose->pci_mem ||
|
|
hose->pci_mem->size < hose->regions[i].size)
|
|
hose->pci_mem = hose->regions + i;
|
|
break;
|
|
case (PCI_REGION_MEM | PCI_REGION_PREFETCH):
|
|
if (!hose->pci_prefetch ||
|
|
hose->pci_prefetch->size < hose->regions[i].size)
|
|
hose->pci_prefetch = hose->regions + i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
if (hose->pci_mem) {
|
|
pciauto_region_init(hose->pci_mem);
|
|
|
|
DEBUGF("PCI Autoconfig: Memory region: [%lx-%lx]\n",
|
|
hose->pci_mem->bus_start,
|
|
hose->pci_mem->bus_start + hose->pci_mem->size - 1);
|
|
}
|
|
|
|
if (hose->pci_prefetch) {
|
|
pciauto_region_init(hose->pci_prefetch);
|
|
|
|
DEBUGF("PCI Autoconfig: Prefetchable Memory region: [%lx-%lx]\n",
|
|
hose->pci_prefetch->bus_start,
|
|
hose->pci_prefetch->bus_start + hose->pci_prefetch->size - 1);
|
|
}
|
|
|
|
if (hose->pci_io) {
|
|
pciauto_region_init(hose->pci_io);
|
|
|
|
DEBUGF("PCI Autoconfig: I/O region: [%lx-%lx]\n",
|
|
hose->pci_io->bus_start,
|
|
hose->pci_io->bus_start + hose->pci_io->size - 1);
|
|
}
|
|
}
|
|
|
|
/* HJF: Changed this to return int. I think this is required
|
|
* to get the correct result when scanning bridges
|
|
*/
|
|
int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
|
|
{
|
|
unsigned int sub_bus = PCI_BUS(dev);
|
|
unsigned short class;
|
|
unsigned char prg_iface;
|
|
int n;
|
|
|
|
pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class);
|
|
|
|
switch(class) {
|
|
case PCI_CLASS_BRIDGE_PCI:
|
|
hose->current_busno++;
|
|
pciauto_setup_device(hose, dev, 2, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
|
|
|
|
DEBUGF("PCI Autoconfig: Found P2P bridge, device %d\n", PCI_DEV(dev));
|
|
|
|
/* Passing in current_busno allows for sibling P2P bridges */
|
|
pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
|
|
/*
|
|
* need to figure out if this is a subordinate bridge on the bus
|
|
* to be able to properly set the pri/sec/sub bridge registers.
|
|
*/
|
|
n = pci_hose_scan_bus(hose, hose->current_busno);
|
|
|
|
/* figure out the deepest we've gone for this leg */
|
|
sub_bus = max(n, sub_bus);
|
|
pciauto_postscan_setup_bridge(hose, dev, sub_bus);
|
|
|
|
sub_bus = hose->current_busno;
|
|
break;
|
|
|
|
case PCI_CLASS_STORAGE_IDE:
|
|
pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &prg_iface);
|
|
if (!(prg_iface & PCIAUTO_IDE_MODE_MASK)) {
|
|
DEBUGF("PCI Autoconfig: Skipping legacy mode IDE controller\n");
|
|
return sub_bus;
|
|
}
|
|
|
|
pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
|
|
break;
|
|
|
|
case PCI_CLASS_BRIDGE_CARDBUS:
|
|
/* just do a minimal setup of the bridge, let the OS take care of the rest */
|
|
pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
|
|
|
|
DEBUGF("PCI Autoconfig: Found P2CardBus bridge, device %d\n", PCI_DEV(dev));
|
|
|
|
hose->current_busno++;
|
|
break;
|
|
|
|
#ifdef CONFIG_MPC5200
|
|
case PCI_CLASS_BRIDGE_OTHER:
|
|
DEBUGF("PCI Autoconfig: Skipping bridge device %d\n",
|
|
PCI_DEV(dev));
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_MPC834X
|
|
case PCI_CLASS_BRIDGE_OTHER:
|
|
/*
|
|
* The host/PCI bridge 1 seems broken in 8349 - it presents
|
|
* itself as 'PCI_CLASS_BRIDGE_OTHER' and appears as an _agent_
|
|
* device claiming resources io/mem/irq.. we only allow for
|
|
* the PIMMR window to be allocated (BAR0 - 1MB size)
|
|
*/
|
|
DEBUGF("PCI Autoconfig: Broken bridge found, only minimal config\n");
|
|
pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
|
|
break;
|
|
#endif
|
|
default:
|
|
pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
|
|
break;
|
|
}
|
|
|
|
return sub_bus;
|
|
}
|
|
|
|
#endif /* CONFIG_PCI */
|
|
|