/*
- * arch/ppc/kernel/pci_auto.c
+ * arch/powerpc/kernel/pci_auto.c
*
* PCI autoconfiguration library
*
*
* 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.
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
-
+#include <errno.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
*
*/
-void pciauto_region_init(struct pci_region* res)
+void pciauto_region_init(struct pci_region *res)
{
/*
* Avoid allocating PCI resources from address 0 -- this is illegal
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)
+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");
+ debug("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");
+ debug("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);
+ debug("address=0x%llx bus_lower=0x%llx", (unsigned long long)addr,
+ (unsigned long long)res->bus_lower);
*bar = addr;
return 0;
struct pci_region *prefetch,
struct pci_region *io)
{
- unsigned int bar_response;
- pci_addr_t bar_value;
+ u32 bar_response;
pci_size_t bar_size;
- unsigned int cmdstat = 0;
- struct pci_region *bar_res;
+ 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_dword(hose, dev, PCI_COMMAND, &cmdstat);
+ 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) {
+ 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);
+ 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) ==
+ if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
PCI_BASE_ADDRESS_MEM_TYPE_64) {
u32 bar_response_upper;
u64 bar64;
- pci_hose_write_config_dword(hose, dev, bar+4, 0xffffffff);
- pci_hose_read_config_dword(hose, dev, bar+4, &bar_response_upper);
+
+#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);
+ debug("PCI Autoconfig: BAR %d, %s, size=0x%llx, ",
+ bar_nr, bar_res == prefetch ? "Prf" : "Mem",
+ (unsigned long long)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);
#endif
}
- cmdstat |= (bar_response & PCI_BASE_ADDRESS_SPACE) ?
- PCI_COMMAND_IO : PCI_COMMAND_MEMORY;
}
+#endif
+ cmdstat |= (bar_response & PCI_BASE_ADDRESS_SPACE) ?
+ PCI_COMMAND_IO : PCI_COMMAND_MEMORY;
- DEBUGF("\n");
+ debug("\n");
bar_nr++;
}
- pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat);
+#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) == 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 = hose->pci_mem;
- struct pci_region *pci_prefetch = hose->pci_prefetch;
- struct pci_region *pci_io = hose->pci_io;
- unsigned int cmdstat;
+ struct pci_region *pci_mem;
+ struct pci_region *pci_prefetch;
+ struct pci_region *pci_io;
+ u16 cmdstat, prefechable_64;
+
+#ifdef CONFIG_DM_PCI
+ /* The root controller has the region information */
+ struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
+
+ pci_mem = ctlr_hose->pci_mem;
+ pci_prefetch = ctlr_hose->pci_prefetch;
+ pci_io = ctlr_hose->pci_io;
+#else
+ pci_mem = hose->pci_mem;
+ pci_prefetch = hose->pci_prefetch;
+ pci_io = hose->pci_io;
+#endif
- pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &cmdstat);
+ 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 */
+#ifdef CONFIG_DM_PCI
+ 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);
+#else
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);
+#endif
pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, 0xff);
if (pci_mem) {
/* 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) {
}
/* Enable memory and I/O accesses, enable bus master */
- pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat | PCI_COMMAND_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;
+ struct pci_region *pci_mem;
+ struct pci_region *pci_prefetch;
+ struct pci_region *pci_io;
+
+#ifdef CONFIG_DM_PCI
+ /* The root controller has the region information */
+ struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
+
+ pci_mem = ctlr_hose->pci_mem;
+ pci_prefetch = ctlr_hose->pci_prefetch;
+ pci_io = ctlr_hose->pci_io;
+#else
+ pci_mem = hose->pci_mem;
+ pci_prefetch = hose->pci_prefetch;
+ pci_io = hose->pci_io;
+#endif
/* Configure bus number registers */
+#ifdef CONFIG_DM_PCI
+ pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, sub_bus);
+#else
pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS,
sub_bus - hose->first_busno);
+#endif
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);
+ (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);
+ (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) {
pciauto_region_align(pci_io, 0x1000);
pci_hose_write_config_byte(hose, dev, PCI_IO_LIMIT,
- ((pci_io->bus_lower-1) & 0x0000f000) >> 8);
+ ((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);
+ ((pci_io->bus_lower - 1) & 0xffff0000) >> 16);
}
}
{
int i;
- hose->pci_io = hose->pci_mem = NULL;
+ hose->pci_io = hose->pci_mem = hose->pci_prefetch = NULL;
- for (i=0; i<hose->region_count; i++) {
+ for (i = 0; i < hose->region_count; i++) {
switch(hose->regions[i].flags) {
case PCI_REGION_IO:
if (!hose->pci_io ||
if (hose->pci_mem) {
pciauto_region_init(hose->pci_mem);
- DEBUGF("PCI Autoconfig: Bus Memory region: [0x%llx-0x%llx],\n"
+ debug("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),
if (hose->pci_prefetch) {
pciauto_region_init(hose->pci_prefetch);
- DEBUGF("PCI Autoconfig: Bus Prefetchable Mem: [0x%llx-0x%llx],\n"
+ debug("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 +
if (hose->pci_io) {
pciauto_region_init(hose->pci_io);
- DEBUGF("PCI Autoconfig: Bus I/O region: [0x%llx-0x%llx],\n"
+ debug("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),
}
}
-/* HJF: Changed this to return int. I think this is required
+/*
+ * 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;
- unsigned char prg_iface;
int n;
- pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class);
+#ifdef CONFIG_DM_PCI
+ /* The root controller has the region information */
+ struct pci_controller *ctlr_hose = pci_bus_to_hose(0);
- switch(class) {
- case PCI_CLASS_PROCESSOR_POWERPC: /* an agent or end-point */
- DEBUGF("PCI AutoConfig: Found PowerPC device\n");
- pciauto_setup_device(hose, dev, 6, hose->pci_mem,
- hose->pci_prefetch, hose->pci_io);
- break;
+ pci_mem = ctlr_hose->pci_mem;
+ pci_prefetch = ctlr_hose->pci_prefetch;
+ pci_io = ctlr_hose->pci_io;
+#else
+ pci_mem = hose->pci_mem;
+ pci_prefetch = hose->pci_prefetch;
+ pci_io = hose->pci_io;
+#endif
+ 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);
+ debug("PCI Autoconfig: Found P2P bridge, device %d\n",
+ PCI_DEV(dev));
- DEBUGF("PCI Autoconfig: Found P2P bridge, device %d\n", PCI_DEV(dev));
+ pciauto_setup_device(hose, dev, 2, pci_mem,
+ pci_prefetch, pci_io);
+#ifdef CONFIG_DM_PCI
+ n = dm_pci_hose_probe_bus(hose, dev);
+ if (n < 0)
+ return n;
+ sub_bus = (unsigned int)n;
+#else
/* 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
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);
+ 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_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);
+#endif
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);
+ /*
+ * 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);
- DEBUGF("PCI Autoconfig: Found P2CardBus bridge, device %d\n", PCI_DEV(dev));
+ debug("PCI Autoconfig: Found P2CardBus bridge, device %d\n",
+ PCI_DEV(dev));
+#ifndef CONFIG_DM_PCI
hose->current_busno++;
+#endif
break;
#if defined(CONFIG_PCIAUTO_SKIP_HOST_BRIDGE)
case PCI_CLASS_BRIDGE_OTHER:
- DEBUGF("PCI Autoconfig: Skipping bridge device %d\n",
- PCI_DEV(dev));
+ debug("PCI Autoconfig: Skipping bridge device %d\n",
+ PCI_DEV(dev));
break;
#endif
#if defined(CONFIG_MPC834x) && !defined(CONFIG_VME8349)
* 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);
+ 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, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
+ pciauto_setup_device(hose, dev, 6, pci_mem,
+ pci_prefetch, pci_io);
break;
}