mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 14:10:43 +00:00
010c480bbf
Forcibly set hose->pci_prefetch to NULL to make sure it will be setup. This will help if for any reason callers didn't make sure themselves to NULL the field. Signed-off-by: Thierry Reding <treding@nvidia.com>
451 lines
12 KiB
C
451 lines
12 KiB
C
/*
|
|
* arch/powerpc/kernel/pci_auto.c
|
|
*
|
|
* PCI autoconfiguration library
|
|
*
|
|
* Author: Matt Porter <mporter@mvista.com>
|
|
*
|
|
* Copyright 2000 MontaVista Software Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
|
|
#include <pci.h>
|
|
|
|
#undef DEBUG
|
|
#ifdef DEBUG
|
|
#define DEBUGF(x...) printf(x)
|
|
#else
|
|
#define DEBUGF(x...)
|
|
#endif /* DEBUG */
|
|
|
|
#define PCIAUTO_IDE_MODE_MASK 0x05
|
|
|
|
/* the user can define CONFIG_SYS_PCI_CACHE_LINE_SIZE to avoid problems */
|
|
#ifndef CONFIG_SYS_PCI_CACHE_LINE_SIZE
|
|
#define CONFIG_SYS_PCI_CACHE_LINE_SIZE 8
|
|
#endif
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
void pciauto_region_init(struct pci_region *res)
|
|
{
|
|
/*
|
|
* Avoid allocating PCI resources from address 0 -- this is illegal
|
|
* according to PCI 2.1 and moreover, this is known to cause Linux IDE
|
|
* drivers to fail. Use a reasonable starting value of 0x1000 instead.
|
|
*/
|
|
res->bus_lower = res->bus_start ? res->bus_start : 0x1000;
|
|
}
|
|
|
|
void pciauto_region_align(struct pci_region *res, pci_size_t size)
|
|
{
|
|
res->bus_lower = ((res->bus_lower - 1) | (size - 1)) + 1;
|
|
}
|
|
|
|
int pciauto_region_allocate(struct pci_region *res, pci_size_t size,
|
|
pci_addr_t *bar)
|
|
{
|
|
pci_addr_t 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%llx bus_lower=0x%llx", (u64)addr, (u64)res->bus_lower);
|
|
|
|
*bar = addr;
|
|
return 0;
|
|
|
|
error:
|
|
*bar = (pci_addr_t)-1;
|
|
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)
|
|
{
|
|
u32 bar_response;
|
|
pci_size_t bar_size;
|
|
u16 cmdstat = 0;
|
|
int bar, bar_nr = 0;
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
pci_addr_t bar_value;
|
|
struct pci_region *bar_res;
|
|
int found_mem64 = 0;
|
|
#endif
|
|
|
|
pci_hose_read_config_word(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 */
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
pci_hose_write_config_dword(hose, dev, bar, 0xffffffff);
|
|
#endif
|
|
pci_hose_read_config_dword(hose, dev, bar, &bar_response);
|
|
|
|
/* If BAR is not implemented go to the next BAR */
|
|
if (!bar_response)
|
|
continue;
|
|
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
found_mem64 = 0;
|
|
#endif
|
|
|
|
/* 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))
|
|
& 0xffff) + 1;
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
bar_res = io;
|
|
#endif
|
|
|
|
DEBUGF("PCI Autoconfig: BAR %d, I/O, size=0x%llx, ", bar_nr, (u64)bar_size);
|
|
} else {
|
|
if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
|
|
PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
u32 bar_response_upper;
|
|
u64 bar64;
|
|
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
pci_hose_write_config_dword(hose, dev, bar + 4,
|
|
0xffffffff);
|
|
#endif
|
|
pci_hose_read_config_dword(hose, dev, bar + 4,
|
|
&bar_response_upper);
|
|
|
|
bar64 = ((u64)bar_response_upper << 32) | bar_response;
|
|
|
|
bar_size = ~(bar64 & PCI_BASE_ADDRESS_MEM_MASK) + 1;
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
found_mem64 = 1;
|
|
#endif
|
|
} else {
|
|
bar_size = (u32)(~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1);
|
|
}
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
if (prefetch && (bar_response & PCI_BASE_ADDRESS_MEM_PREFETCH))
|
|
bar_res = prefetch;
|
|
else
|
|
bar_res = mem;
|
|
#endif
|
|
|
|
DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%llx, ", bar_nr, (u64)bar_size);
|
|
}
|
|
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
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, (u32)bar_value);
|
|
|
|
if (found_mem64) {
|
|
bar += 4;
|
|
#ifdef CONFIG_SYS_PCI_64BIT
|
|
pci_hose_write_config_dword(hose, dev, bar, (u32)(bar_value>>32));
|
|
#else
|
|
/*
|
|
* 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.
|
|
*/
|
|
pci_hose_write_config_dword(hose, dev, bar, 0x00000000);
|
|
#endif
|
|
}
|
|
|
|
}
|
|
#endif
|
|
cmdstat |= (bar_response & PCI_BASE_ADDRESS_SPACE) ?
|
|
PCI_COMMAND_IO : PCI_COMMAND_MEMORY;
|
|
|
|
DEBUGF("\n");
|
|
|
|
bar_nr++;
|
|
}
|
|
|
|
pci_hose_write_config_word(hose, dev, PCI_COMMAND, cmdstat);
|
|
pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE,
|
|
CONFIG_SYS_PCI_CACHE_LINE_SIZE);
|
|
pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
|
|
}
|
|
|
|
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;
|
|
u16 cmdstat;
|
|
|
|
pci_hose_read_config_word(hose, dev, PCI_COMMAND, &cmdstat);
|
|
|
|
/* Configure bus number registers */
|
|
pci_hose_write_config_byte(hose, dev, PCI_PRIMARY_BUS,
|
|
PCI_BUS(dev) - hose->first_busno);
|
|
pci_hose_write_config_byte(hose, dev, PCI_SECONDARY_BUS,
|
|
sub_bus - hose->first_busno);
|
|
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_word(hose, dev, PCI_COMMAND,
|
|
cmdstat | PCI_COMMAND_MASTER);
|
|
}
|
|
|
|
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 - hose->first_busno);
|
|
|
|
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 = hose->pci_prefetch = 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: Bus Memory region: [0x%llx-0x%llx],\n"
|
|
"\t\tPhysical Memory [%llx-%llxx]\n",
|
|
(u64)hose->pci_mem->bus_start,
|
|
(u64)(hose->pci_mem->bus_start + hose->pci_mem->size - 1),
|
|
(u64)hose->pci_mem->phys_start,
|
|
(u64)(hose->pci_mem->phys_start + hose->pci_mem->size - 1));
|
|
}
|
|
|
|
if (hose->pci_prefetch) {
|
|
pciauto_region_init(hose->pci_prefetch);
|
|
|
|
DEBUGF("PCI Autoconfig: Bus Prefetchable Mem: [0x%llx-0x%llx],\n"
|
|
"\t\tPhysical Memory [%llx-%llx]\n",
|
|
(u64)hose->pci_prefetch->bus_start,
|
|
(u64)(hose->pci_prefetch->bus_start +
|
|
hose->pci_prefetch->size - 1),
|
|
(u64)hose->pci_prefetch->phys_start,
|
|
(u64)(hose->pci_prefetch->phys_start +
|
|
hose->pci_prefetch->size - 1));
|
|
}
|
|
|
|
if (hose->pci_io) {
|
|
pciauto_region_init(hose->pci_io);
|
|
|
|
DEBUGF("PCI Autoconfig: Bus I/O region: [0x%llx-0x%llx],\n"
|
|
"\t\tPhysical Memory: [%llx-%llx]\n",
|
|
(u64)hose->pci_io->bus_start,
|
|
(u64)(hose->pci_io->bus_start + hose->pci_io->size - 1),
|
|
(u64)hose->pci_io->phys_start,
|
|
(u64)(hose->pci_io->phys_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;
|
|
|
|
#if defined(CONFIG_PCIAUTO_SKIP_HOST_BRIDGE)
|
|
case PCI_CLASS_BRIDGE_OTHER:
|
|
DEBUGF("PCI Autoconfig: Skipping bridge device %d\n",
|
|
PCI_DEV(dev));
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_MPC834x) && !defined(CONFIG_VME8349)
|
|
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
|
|
|
|
case PCI_CLASS_PROCESSOR_POWERPC: /* an agent or end-point */
|
|
DEBUGF("PCI AutoConfig: Found PowerPC device\n");
|
|
|
|
default:
|
|
pciauto_setup_device(hose, dev, 6, hose->pci_mem,
|
|
hose->pci_prefetch, hose->pci_io);
|
|
break;
|
|
}
|
|
|
|
return sub_bus;
|
|
}
|