404 lines
11 KiB
C
404 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* PCI autoconfiguration library (legacy version, do not change)
|
|
*
|
|
* Author: Matt Porter <mporter@mvista.com>
|
|
*
|
|
* Copyright 2000 MontaVista Software Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <pci.h>
|
|
|
|
/*
|
|
* Do not change this file. Instead, convert your board to use CONFIG_DM_PCI
|
|
* and change pci_auto.c.
|
|
*/
|
|
|
|
/* 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_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
|
|
u8 header_type;
|
|
int rom_addr;
|
|
pci_addr_t bar_value;
|
|
struct pci_region *bar_res;
|
|
int found_mem64 = 0;
|
|
#endif
|
|
u16 class;
|
|
|
|
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
|
|
|
|
debug("PCI Autoconfig: BAR %d, I/O, size=0x%llx, ",
|
|
bar_nr, (unsigned long long)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;
|
|
|
|
debug("PCI Autoconfig: BAR %d, %s, size=0x%llx, ",
|
|
bar_nr, bar_res == prefetch ? "Prf" : "Mem",
|
|
(unsigned long long)bar_size);
|
|
#endif
|
|
}
|
|
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
if (pciauto_region_allocate(bar_res, bar_size,
|
|
&bar_value, found_mem64) == 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;
|
|
|
|
debug("\n");
|
|
|
|
bar_nr++;
|
|
}
|
|
|
|
#ifndef CONFIG_PCI_ENUM_ONLY
|
|
/* Configure the expansion ROM address */
|
|
pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &header_type);
|
|
header_type &= 0x7f;
|
|
if (header_type != PCI_HEADER_TYPE_CARDBUS) {
|
|
rom_addr = (header_type == PCI_HEADER_TYPE_NORMAL) ?
|
|
PCI_ROM_ADDRESS : PCI_ROM_ADDRESS1;
|
|
pci_hose_write_config_dword(hose, dev, rom_addr, 0xfffffffe);
|
|
pci_hose_read_config_dword(hose, dev, rom_addr, &bar_response);
|
|
if (bar_response) {
|
|
bar_size = -(bar_response & ~1);
|
|
debug("PCI Autoconfig: ROM, size=%#x, ",
|
|
(unsigned int)bar_size);
|
|
if (pciauto_region_allocate(mem, bar_size,
|
|
&bar_value, false) == 0) {
|
|
pci_hose_write_config_dword(hose, dev, rom_addr,
|
|
bar_value);
|
|
}
|
|
cmdstat |= PCI_COMMAND_MEMORY;
|
|
debug("\n");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* PCI_COMMAND_IO must be set for VGA device */
|
|
pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class);
|
|
if (class == PCI_CLASS_DISPLAY_VGA)
|
|
cmdstat |= PCI_COMMAND_IO;
|
|
|
|
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;
|
|
struct pci_region *pci_prefetch;
|
|
struct pci_region *pci_io;
|
|
u16 cmdstat, prefechable_64;
|
|
|
|
pci_mem = hose->pci_mem;
|
|
pci_prefetch = hose->pci_prefetch;
|
|
pci_io = hose->pci_io;
|
|
|
|
pci_hose_read_config_word(hose, dev, PCI_COMMAND, &cmdstat);
|
|
pci_hose_read_config_word(hose, dev, PCI_PREF_MEMORY_BASE,
|
|
&prefechable_64);
|
|
prefechable_64 &= PCI_PREF_RANGE_TYPE_MASK;
|
|
|
|
/* 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);
|
|
if (prefechable_64 == PCI_PREF_RANGE_TYPE_64)
|
|
#ifdef CONFIG_SYS_PCI_64BIT
|
|
pci_hose_write_config_dword(hose, dev,
|
|
PCI_PREF_BASE_UPPER32,
|
|
pci_prefetch->bus_lower >> 32);
|
|
#else
|
|
pci_hose_write_config_dword(hose, dev,
|
|
PCI_PREF_BASE_UPPER32,
|
|
0x0);
|
|
#endif
|
|
|
|
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 (prefechable_64 == PCI_PREF_RANGE_TYPE_64) {
|
|
pci_hose_write_config_word(hose, dev, PCI_PREF_BASE_UPPER32, 0x0);
|
|
pci_hose_write_config_word(hose, dev, PCI_PREF_LIMIT_UPPER32, 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;
|
|
struct pci_region *pci_prefetch;
|
|
struct pci_region *pci_io;
|
|
|
|
pci_mem = hose->pci_mem;
|
|
pci_prefetch = hose->pci_prefetch;
|
|
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) {
|
|
u16 prefechable_64;
|
|
|
|
pci_hose_read_config_word(hose, dev,
|
|
PCI_PREF_MEMORY_LIMIT,
|
|
&prefechable_64);
|
|
prefechable_64 &= PCI_PREF_RANGE_TYPE_MASK;
|
|
|
|
/* 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 (prefechable_64 == PCI_PREF_RANGE_TYPE_64)
|
|
#ifdef CONFIG_SYS_PCI_64BIT
|
|
pci_hose_write_config_dword(hose, dev,
|
|
PCI_PREF_LIMIT_UPPER32,
|
|
(pci_prefetch->bus_lower - 1) >> 32);
|
|
#else
|
|
pci_hose_write_config_dword(hose, dev,
|
|
PCI_PREF_LIMIT_UPPER32,
|
|
0x0);
|
|
#endif
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
struct pci_region *pci_mem;
|
|
struct pci_region *pci_prefetch;
|
|
struct pci_region *pci_io;
|
|
unsigned int sub_bus = PCI_BUS(dev);
|
|
unsigned short class;
|
|
int n;
|
|
|
|
pci_mem = hose->pci_mem;
|
|
pci_prefetch = hose->pci_prefetch;
|
|
pci_io = hose->pci_io;
|
|
|
|
pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class);
|
|
|
|
switch (class) {
|
|
case PCI_CLASS_BRIDGE_PCI:
|
|
debug("PCI Autoconfig: Found P2P bridge, device %d\n",
|
|
PCI_DEV(dev));
|
|
|
|
pciauto_setup_device(hose, dev, 2, pci_mem,
|
|
pci_prefetch, pci_io);
|
|
|
|
/* Passing in current_busno allows for sibling P2P bridges */
|
|
hose->current_busno++;
|
|
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((unsigned int)n, sub_bus);
|
|
pciauto_postscan_setup_bridge(hose, dev, sub_bus);
|
|
|
|
sub_bus = hose->current_busno;
|
|
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, pci_mem,
|
|
pci_prefetch, pci_io);
|
|
|
|
debug("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:
|
|
debug("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)
|
|
*/
|
|
debug("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 */
|
|
debug("PCI AutoConfig: Found PowerPC device\n");
|
|
|
|
default:
|
|
pciauto_setup_device(hose, dev, 6, pci_mem,
|
|
pci_prefetch, pci_io);
|
|
break;
|
|
}
|
|
|
|
return sub_bus;
|
|
}
|