+++ /dev/null
-/* pci-config-space.c: Read the PCI configuration space.
-
- Read the PCI configuration space using the Intel bus-bridge interface
- registers. This bypasses the BIOS32 entry, and thus we are not assured
- of working on all systems.
-
- Copyright 1998-2002 by Donald Becker.
- This software may be used and distributed according to the terms of
- the GNU General Public License (GPL), incorporated herein by reference.
- Contact the author for use under other terms.
-
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
-
- Support and updates available at
- http://www.scyld.com/diag/index.html
-
- Common-sense licensing statement: Using any portion of this program in
- your own program means that you must give credit to the original author
- and release the resulting code under the GPL.
- */
-
-static char *version_msg =
-"pci-config.c:v2.03 4/15/2002 Donald Becker (becker@scyld.com)\n"
-" http://www.scyld.com/diag/index.html\n";
-static char *usage_msg =
-"Usage: pci-config [-aDfSvVW] [-# <device_index>]\n";
-
-static char *long_usage_msg ="
-
- This program shows the contents of PCI configuration space.
- It reads the hardware registers, and thus must be run as 'root'.
-
- Running this program with no options shows the installed PCI devices.
- Each line is prefixed by its index which may be used with -#<index>
- e.g. \"pci-config -#3\" to specify the device to operate on.
-
- Commonly use options are
- -# <device-index> Operate only on DEVICE-INDEX e.g -#3
-
- The operations on the selected device are
- -a --show-addresses Show PCI address registers.
- -S --sleep Put device to sleep (ACPI D3 state)
- -W --wake Wake a sleeping device (ACPI D0 state)
-
- Less commonly used options are
- -B <bus> --bus <bus> Show only devices on BUS.
- -A <addr> --set-addresses Set PCI address register 1 to the ADDR.
- -D --debug Show details of operations
- -f --force Override checks and perform the operation
- -u --usage Show this long usage message
- -v --verbose Verbose mode
- -V --version Display this program's version information
-
-";
-
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <getopt.h>
-#if defined(__linux__) && __GNU_LIBRARY__ == 1
-#include <asm/io.h> /* Newer libraries use <sys/io.h> instead. */
-#else
-#include <sys/io.h>
-#endif
-#if !defined(__OPTIMIZE__)
-#error You must compile this driver with "-O"!
-#endif
-
-struct option longopts[] = {
- {"show-addresses", 0, 0, 'a'}, /* Show PCI address registers. */
- {"set-addresses", 1, 0, 'A'}, /* Show PCI address registers. */
- {"bus", 1, 0, 'B'}, /* Show only devices on BUS. */
- {"debug", 0, 0, 'D'}, /* Increase debug level. */
- {"force", 0, 0, 'f'}, /* Force operation. */
- {"set-WOL", 0, 0, 'M'}, /* Set to Wake-On-LAN mode. */
- {"sleep", 0, 0, 'S'}, /* Put device to sleep (ACPI D3 state). */
- {"usage", 0, 0, 'u'}, /* Show the long usage message. */
- {"verbose", 0, 0, 'v'}, /* Verbose mode */
- {"version", 0, 0, 'V'}, /* Display version number */
- {"wake-on-lan", 0, 0, 'W'}, /* Wake (set to D0 state) the device. */
- {"device-index", 1, 0, '#'}, /* Operate only on device INDEX. */
- { 0, 0, 0, 0 }
-};
-
-static int verbose=1, opt_a=0, opt_f=0, opt_wake=0, opt_set_WOL=0, debug=0;
-static int opt_sleep = 0;
-static long set_address = -1;
-
-static void show_addr_config(unsigned char pci_bus, unsigned char pci_dev_fn);
-static void show_ext_caps(unsigned int *cfg_space, unsigned char pci_bus,
- unsigned char pci_dev_fn);
-static void show_one_device(unsigned char pci_bus, unsigned char pci_dev_fn,
- int dev_num);
-
-static void cyclone_WOL(int pci_bus, int pci_dev_fn, void *pci_config_space);
-static void acpi_wake(unsigned char pci_bus, unsigned char pci_dev_fn,
- void *config);
-static void acpi_sleep(unsigned char bus, unsigned char devfn, void *pci_cfg);
-static int dump_mem_region(long addr);
-
-extern int pcibios_read_config_byte (unsigned char bus, unsigned char dev_fn,
- unsigned char where, unsigned char *val);
-int pcibios_read_config_word (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned short *val);
-extern int pcibios_read_config_dword (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned int *val);
-void pcibios_write_config_byte (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned char val);
-void pcibios_write_config_word (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned short val);
-void pcibios_write_config_dword (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned int val);
-
-\f
-int main(int argc, char **argv)
-{
- int pci_bus = 0, pci_dev_fn;
- int errflag = 0, show_version = 0;
- int c, longind, card_num = 0;
- int dev_num = 0;
-
- while ((c = getopt_long(argc, argv, "#:aA:b:B:DfMSuvVW",
- longopts, &longind))
- != -1)
- switch (c) {
- case 'a': opt_a++; break;
- case 'A': set_address = strtol(optarg, NULL, 16); break;
- case 'b': printf("Setting bus to %s.\n", optarg);
- case 'B': pci_bus = strtol(optarg, NULL, 0); break;
- case 'D': debug++; break;
- case 'f': opt_f++; break;
- case 'M': opt_set_WOL++; break;
- case 'S': opt_sleep++; break;
- case 'u': printf("%s%s", usage_msg, long_usage_msg); return 0;
- case 'v': verbose++; break;
- case 'V': show_version++; break;
- case 'W': opt_wake++; break;
- case '#': card_num = atoi(optarg); break;
- case '?':
- errflag++;
- }
- if (errflag) {
- fprintf(stderr, "%s%s", usage_msg, " Use -u for more information.\n");
- return 3;
- }
-
- if (verbose)
- printf(version_msg);
-
- /* Get access to all of I/O space. */
- if (iopl(3) < 0) {
- perror("pci-config: iopl()");
- fprintf(stderr, "This program must be run as root.\n");
- return 2;
- }
- for (pci_dev_fn = 0; pci_dev_fn < 256; pci_dev_fn++) {
- /*unsigned char cb;*/
- unsigned int pci_id;
-
- pcibios_read_config_dword(pci_bus, pci_dev_fn, 0, &pci_id);
- if (pci_id == 0xffffffff)
- continue;
- dev_num++;
- if (card_num == 0) {
- printf("Device #%d at bus %d device/function %d/%d, %8.8x.\n",
- dev_num, pci_bus, pci_dev_fn>>3, pci_dev_fn&7, pci_id);
- } else if (card_num == dev_num) {
- show_one_device(pci_bus, pci_dev_fn, dev_num);
- }
- if ((pci_dev_fn & 7) == 0) {
- unsigned int cdw;
- pcibios_read_config_dword(pci_bus, pci_dev_fn, 3*4, &cdw);
- if ((cdw & 0x00800000) == 0)
- pci_dev_fn += 7;
- }
- }
-
- return 0;
-}
-
-static void show_one_device(unsigned char pci_bus, unsigned char pci_dev_fn,
- int dev_num)
-{
- unsigned int config[64];
- int i;
- int pci_id;
-
- printf("Device #%d at bus %d device/function %d/%d.",
- dev_num, pci_bus, pci_dev_fn>>3, pci_dev_fn&7);
- for (i = 0; i < 64; i++) {
- pcibios_read_config_dword(pci_bus, pci_dev_fn, i<<2, &config[i]);
- printf("%s%8.8x", i % 8 == 0 ? "\n " : " ", config[i]);
- }
- printf("\n");
- for (i = 0; i < 5; i++) {
- unsigned int pciaddr = config[4 + i];
- if (pciaddr)
- printf(" Base Address %d: %s at %8.8x.\n",
- i, pciaddr & 1 ? "I/O" : "Memory", pciaddr & ~1);
- }
- if (set_address >= 0) {
- fprintf(stderr, "Setting PCI address register 1 to 0x%lx.\n",
- set_address);
- pcibios_write_config_dword(pci_bus, pci_dev_fn, 0x14, set_address);
- pcibios_write_config_dword(pci_bus, pci_dev_fn, 0x04, config[1] | 3);
- }
- if (opt_a)
- show_addr_config(pci_bus, pci_dev_fn);
- pci_id = config[0];
- if (config[1] & 0x00100000)
- show_ext_caps(config, pci_bus, pci_dev_fn);
- if (config[10]) {
- char *cis_addr_space[] = {"PCI configuration space", "BAR 0", "BAR 1", "BAR 2", "BAR 3", };
- int space = config[10] & 7;
- printf(" CardBus CIS pointer 0x%4.4x (%s), address %x.\n", config[10],
- cis_addr_space[space], config[4 + (space-1)]);
- if (space > 0 && space < 4)
- dump_mem_region(config[4 + ((space-1))]);
- }
- if (opt_sleep)
- acpi_sleep(pci_bus, pci_dev_fn, config);
- if (opt_wake)
- acpi_wake(pci_bus, pci_dev_fn, config);
- if (opt_set_WOL)
- if (pci_id == 0x905510b7)
- cyclone_WOL(pci_bus, pci_dev_fn, config);
-}
-
-static void show_addr_config(unsigned char pci_bus, unsigned char pci_dev_fn)
-{
- int i;
- unsigned int pciaddr, cdw;
- for (i = 0; i < 5; i++) {
- int cfg_i = 0x10 + (i<<2);
- pcibios_read_config_dword(pci_bus, pci_dev_fn, cfg_i, &pciaddr);
- pcibios_write_config_dword(pci_bus, pci_dev_fn, cfg_i, 0xffffffff);
- pcibios_read_config_dword(pci_bus, pci_dev_fn, cfg_i, &cdw);
- if (cdw == 0)
- break;
- printf(" Address %d %s at %8.8x, decoded bits are %8.8x.\n",
- i, cdw & 1 ? "is I/O" : "memory", pciaddr & ~1, ~cdw);
- pcibios_write_config_dword(pci_bus, pci_dev_fn, cfg_i, pciaddr);
- }
- pcibios_read_config_dword(pci_bus, pci_dev_fn, 0x30, &pciaddr);
- pcibios_write_config_dword(pci_bus, pci_dev_fn, 0x30, 0xfffffffe);
- pcibios_read_config_dword(pci_bus, pci_dev_fn, 0x30, &cdw);
- pcibios_write_config_dword(pci_bus, pci_dev_fn, 0x30, pciaddr);
- if (cdw)
- printf(" BIOS ROM at %8.8x, decoded bits are %8.8x.\n", pciaddr, cdw);
- else
- printf(" No BIOS extension (boot ROM).\n");
- return;
-}
-static void show_ext_caps(unsigned int *cfg_space, unsigned char pci_bus,
- unsigned char pci_dev_fn)
-{
- unsigned char *pcfg = (void *)cfg_space;
- int cap_idx = cfg_space[13] & 0xff;
-
- printf(" Extended capabilities, first structure at offset 0x%x.\n",
- cap_idx);
- for (; cap_idx; cap_idx = pcfg[cap_idx + 1]) {
- printf(" Extended PCI capability type %d at 0x%2.2x, next %d.\n",
- pcfg[cap_idx], cap_idx, pcfg[cap_idx + 1]);
- if (pcfg[cap_idx] == 1) {
- printf(" Power management entry ver. %d: Capabilities %2.2x%2.2x"
- ", Ctrl %2.2x%2.2x, Event %2.2x%2.2x.\n",
- pcfg[cap_idx + 2] & 7,
- pcfg[cap_idx + 3], pcfg[cap_idx + 2],
- pcfg[cap_idx + 5], pcfg[cap_idx + 4],
- pcfg[cap_idx + 7], pcfg[cap_idx + 6]);
- printf(" Power state D%d.\n", pcfg[cap_idx + 4] & 3);
- }
- }
-}
-
-
-static int acpi_find(unsigned char pci_bus, unsigned char pci_dev_fn,
- void *config)
-{
- unsigned char *pcfg = (void *)config;
- if (pcfg[6] & 0x10) {
- int cap_idx = pcfg[0x34];
-
- printf(" Extended capabilities, first structure at offset 0x%x.\n",
- cap_idx);
- for (; cap_idx; cap_idx = pcfg[cap_idx + 1]) {
- if (pcfg[cap_idx] == 1)
- return cap_idx;
- }
- }
- return 0;
-}
-
-static void acpi_wake(unsigned char pci_bus, unsigned char pci_dev_fn,
- void *pci_config_space)
-{
- unsigned char *config = pci_config_space;
- unsigned short *configw = pci_config_space;
- unsigned int *configdw = pci_config_space;
- int pwr_idx = acpi_find(pci_bus, pci_dev_fn, config);
- unsigned short pwr_command = configw[(pwr_idx + 4)>>1];
- int i;
-
- if (debug)
- printf("Power index is %#x.\n", pwr_idx);
-
- printf(" Waking up an ACPI device. Currently powered %s, "
- "I/O %#x IRQ %d.\n"
- " Updating the power state of %4.4x->%4.4x.\n",
- pwr_command & 3 ? "down" : "up", configdw[0x10>>2], config[0x3c],
- pwr_command, pwr_command & ~3);
- pcibios_write_config_word(pci_bus, pci_dev_fn, pwr_idx + 4,
- pwr_command & ~3);
- /* Many devices must have their PCI register state restored when changing
- from D3 state. */
- for (i = 0x10; i <= 0x20; i+=4)
- pcibios_write_config_dword(pci_bus, pci_dev_fn, i, configdw[i >> 2]);
- /* PCI_ROM_ADDRESS, interrupt line, cache line size, latency timer */
- pcibios_write_config_dword(pci_bus, pci_dev_fn, 0x30, configdw[0x30 >> 2]);
- pcibios_write_config_byte(pci_bus, pci_dev_fn, 0x3c, config[0x3c]);
- pcibios_write_config_byte(pci_bus, pci_dev_fn, 0x0c, config[0x0c]);
- pcibios_write_config_byte(pci_bus, pci_dev_fn, 0x0d, config[0x0d]);
- /* Finally, restore the command register. */
- pcibios_write_config_word(pci_bus, pci_dev_fn, 0x04, configw[4>>1]);
-}
-
-static void acpi_sleep(unsigned char bus, unsigned char devfn,
- void *pci_config_space)
-{
- unsigned short *configw = pci_config_space;
- int pwr_idx = acpi_find(bus, devfn, pci_config_space);
- unsigned short pwr_command = configw[(pwr_idx + 4)>>1];
- pcibios_write_config_word(bus, devfn, pwr_idx + 4, pwr_command | 0x0103);
-}
-
-/* Put the 3Com Cyclone e.g. 3c905B series into Wake On LAN mode. */
-static void cyclone_WOL(int pci_bus, int pci_dev_fn, void *config)
-{
- int pwr_idx = acpi_find(pci_bus, pci_dev_fn, config);
- unsigned short pwr_command = ((unsigned short *)config)[(pwr_idx + 4)>>1];
- long ioaddr = ((int *)config)[0x10];
-
- acpi_wake(pci_bus, pci_dev_fn, config);
-
- outw(0x801f, ioaddr + 0x0e); /* Set RxFilter to accept frames. */
- outw((1<<11) + 7, ioaddr + 0x0e);
- outw(7, ioaddr + 0x0c);
- printf(" Window 7 Power Management Event is %4.4x.\n",
- inw(ioaddr + 0x0c));
- printf(" Changing the power state from %4.4x to 0103.\n", pwr_command);
- outw(0x2000, ioaddr + 0x0e); /* RxEnable. */
- pcibios_write_config_word(pci_bus, pci_dev_fn, 0xe0, pwr_command | 0x8103);
-}
-
-\f
-#define PCI_CONFIG_ADDR 0x0cf8
-#define PCI_CONFIG_DATA 0x0cfc
-
-int pcibios_read_config_byte (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned char *val)
-{
- outl(0x80000000 | (bus<<16) | (dev_fn << 8) | (regnum & 0xfc),
- PCI_CONFIG_ADDR);
- *val = inb(PCI_CONFIG_DATA + (regnum & 3));
- return 0;
-}
-int pcibios_read_config_word (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned short *val)
-{
- outl(0x80000000 | (bus<<16) | (dev_fn << 8) | (regnum & 0xfc),
- PCI_CONFIG_ADDR);
- *val = inw(PCI_CONFIG_DATA + (regnum & 2));
- return 0;
-}
-int pcibios_read_config_dword (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned int *val)
-{
- outl(0x80000000 | (bus<<16) | (dev_fn << 8) | (regnum & 0xfc),
- PCI_CONFIG_ADDR);
- *val = inl(PCI_CONFIG_DATA);
- return 0;
-}
-void pcibios_write_config_byte (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned char val)
-{
- outl(0x80000000 | (bus<<16) | (dev_fn << 8) | (regnum & 0xfc),
- PCI_CONFIG_ADDR);
- outb(val, PCI_CONFIG_DATA + (regnum & 3));
- return;
-}
-void pcibios_write_config_word (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned short val)
-{
- outl(0x80000000 | (bus<<16) | (dev_fn << 8) | (regnum & 0xfc),
- PCI_CONFIG_ADDR);
- outw(val, PCI_CONFIG_DATA + (regnum & 2));
- return;
-}
-void pcibios_write_config_dword (unsigned char bus, unsigned char dev_fn,
- unsigned char regnum, unsigned int val)
-{
- outl(0x80000000 | (bus<<16) | (dev_fn << 8) | (regnum & 0xfc),
- PCI_CONFIG_ADDR);
- outl(val, PCI_CONFIG_DATA);
- return;
-}
-
-\f
-/* Map the board shared memory into our address space -- this code is
- a good example of non-kernel access to devices on the PCI bus. */
-static int dump_mem_region(long addr)
-{
- unsigned short *shared_mem;
- int i;
- int memfd = open("/dev/kmem", O_RDWR);
-
- if (memfd < 0) {
- perror("/dev/kmem (shared memory)");
- return 2;
- } else
- printf("Opened /dev/kmem for PCI memory.\n");
- shared_mem = mmap(0, 0x8000, PROT_READ|PROT_WRITE,
- MAP_SHARED, memfd, addr);
- printf("Shared memory at %#x (%#x).\n", (int)addr, (int)shared_mem);
- for (i = 0; i < 100; i++)
- printf(" %4.4x", shared_mem[i]);
- close(memfd);
- printf(" ...\n");
- return 0;
-}
-
-/*
- * Local variables:
- * compile-command: "cc -O -Wall -o pci-config pci-config.c"
- * tab-width: 4
- * c-indent-level: 4
- * c-basic-offset: 4
- * End:
- */
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