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u-boot/common/cmd_pci.c
Simon Glass 4c12eeb8b5 Convert cmd_usage() calls in common to use a return value 
Change all files in common/ to use CMD_RET_USAGE instead of calling
cmd_usage() directly. I'm not completely sure about this patch since
the code since impact is small (100 byte or so on ARM) and it might
need splitting into smaller patches. But for now here it is.

Signed-off-by: Simon Glass <sjg@chromium.org>
2012-03-06 21:09:46 +01:00

508 lines
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/*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
* Wolfgang Grandegger, DENX Software Engineering, wg@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* PCI routines
*/
#include <common.h>
#include <command.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <pci.h>
unsigned char ShortPCIListing = 1;
/*
* Follows routines for the output of infos about devices on PCI bus.
*/
void pci_header_show(pci_dev_t dev);
void pci_header_show_brief(pci_dev_t dev);
/*
* Subroutine: pciinfo
*
* Description: Show information about devices on PCI bus.
* Depending on the define CONFIG_SYS_SHORT_PCI_LISTING
* the output will be more or less exhaustive.
*
* Inputs: bus_no the number of the bus to be scanned.
*
* Return: None
*
*/
void pciinfo(int BusNum, int ShortPCIListing)
{
int Device;
int Function;
unsigned char HeaderType;
unsigned short VendorID;
pci_dev_t dev;
printf("Scanning PCI devices on bus %d\n", BusNum);
if (ShortPCIListing) {
printf("BusDevFun VendorId DeviceId Device Class Sub-Class\n");
printf("_____________________________________________________________\n");
}
for (Device = 0; Device < PCI_MAX_PCI_DEVICES; Device++) {
HeaderType = 0;
VendorID = 0;
for (Function = 0; Function < PCI_MAX_PCI_FUNCTIONS; Function++) {
/*
* If this is not a multi-function device, we skip the rest.
*/
if (Function && !(HeaderType & 0x80))
break;
dev = PCI_BDF(BusNum, Device, Function);
pci_read_config_word(dev, PCI_VENDOR_ID, &VendorID);
if ((VendorID == 0xFFFF) || (VendorID == 0x0000))
continue;
if (!Function) pci_read_config_byte(dev, PCI_HEADER_TYPE, &HeaderType);
if (ShortPCIListing)
{
printf("%02x.%02x.%02x ", BusNum, Device, Function);
pci_header_show_brief(dev);
}
else
{
printf("\nFound PCI device %02x.%02x.%02x:\n",
BusNum, Device, Function);
pci_header_show(dev);
}
}
}
}
/*
* Subroutine: pci_header_show_brief
*
* Description: Reads and prints the header of the
* specified PCI device in short form.
*
* Inputs: dev Bus+Device+Function number
*
* Return: None
*
*/
void pci_header_show_brief(pci_dev_t dev)
{
u16 vendor, device;
u8 class, subclass;
pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
pci_read_config_word(dev, PCI_DEVICE_ID, &device);
pci_read_config_byte(dev, PCI_CLASS_CODE, &class);
pci_read_config_byte(dev, PCI_CLASS_SUB_CODE, &subclass);
printf("0x%.4x 0x%.4x %-23s 0x%.2x\n",
vendor, device,
pci_class_str(class), subclass);
}
/*
* Subroutine: PCI_Header_Show
*
* Description: Reads the header of the specified PCI device.
*
* Inputs: BusDevFunc Bus+Device+Function number
*
* Return: None
*
*/
void pci_header_show(pci_dev_t dev)
{
u8 _byte, header_type;
u16 _word;
u32 _dword;
#define PRINT(msg, type, reg) \
pci_read_config_##type(dev, reg, &_##type); \
printf(msg, _##type)
#define PRINT2(msg, type, reg, func) \
pci_read_config_##type(dev, reg, &_##type); \
printf(msg, _##type, func(_##type))
pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
PRINT (" vendor ID = 0x%.4x\n", word, PCI_VENDOR_ID);
PRINT (" device ID = 0x%.4x\n", word, PCI_DEVICE_ID);
PRINT (" command register = 0x%.4x\n", word, PCI_COMMAND);
PRINT (" status register = 0x%.4x\n", word, PCI_STATUS);
PRINT (" revision ID = 0x%.2x\n", byte, PCI_REVISION_ID);
PRINT2(" class code = 0x%.2x (%s)\n", byte, PCI_CLASS_CODE,
pci_class_str);
PRINT (" sub class code = 0x%.2x\n", byte, PCI_CLASS_SUB_CODE);
PRINT (" programming interface = 0x%.2x\n", byte, PCI_CLASS_PROG);
PRINT (" cache line = 0x%.2x\n", byte, PCI_CACHE_LINE_SIZE);
PRINT (" latency time = 0x%.2x\n", byte, PCI_LATENCY_TIMER);
PRINT (" header type = 0x%.2x\n", byte, PCI_HEADER_TYPE);
PRINT (" BIST = 0x%.2x\n", byte, PCI_BIST);
PRINT (" base address 0 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_0);
switch (header_type & 0x03) {
case PCI_HEADER_TYPE_NORMAL: /* "normal" PCI device */
PRINT (" base address 1 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_1);
PRINT (" base address 2 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_2);
PRINT (" base address 3 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_3);
PRINT (" base address 4 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_4);
PRINT (" base address 5 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_5);
PRINT (" cardBus CIS pointer = 0x%.8x\n", dword, PCI_CARDBUS_CIS);
PRINT (" sub system vendor ID = 0x%.4x\n", word, PCI_SUBSYSTEM_VENDOR_ID);
PRINT (" sub system ID = 0x%.4x\n", word, PCI_SUBSYSTEM_ID);
PRINT (" expansion ROM base address = 0x%.8x\n", dword, PCI_ROM_ADDRESS);
PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
PRINT (" min Grant = 0x%.2x\n", byte, PCI_MIN_GNT);
PRINT (" max Latency = 0x%.2x\n", byte, PCI_MAX_LAT);
break;
case PCI_HEADER_TYPE_BRIDGE: /* PCI-to-PCI bridge */
PRINT (" base address 1 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_1);
PRINT (" primary bus number = 0x%.2x\n", byte, PCI_PRIMARY_BUS);
PRINT (" secondary bus number = 0x%.2x\n", byte, PCI_SECONDARY_BUS);
PRINT (" subordinate bus number = 0x%.2x\n", byte, PCI_SUBORDINATE_BUS);
PRINT (" secondary latency timer = 0x%.2x\n", byte, PCI_SEC_LATENCY_TIMER);
PRINT (" IO base = 0x%.2x\n", byte, PCI_IO_BASE);
PRINT (" IO limit = 0x%.2x\n", byte, PCI_IO_LIMIT);
PRINT (" secondary status = 0x%.4x\n", word, PCI_SEC_STATUS);
PRINT (" memory base = 0x%.4x\n", word, PCI_MEMORY_BASE);
PRINT (" memory limit = 0x%.4x\n", word, PCI_MEMORY_LIMIT);
PRINT (" prefetch memory base = 0x%.4x\n", word, PCI_PREF_MEMORY_BASE);
PRINT (" prefetch memory limit = 0x%.4x\n", word, PCI_PREF_MEMORY_LIMIT);
PRINT (" prefetch memory base upper = 0x%.8x\n", dword, PCI_PREF_BASE_UPPER32);
PRINT (" prefetch memory limit upper = 0x%.8x\n", dword, PCI_PREF_LIMIT_UPPER32);
PRINT (" IO base upper 16 bits = 0x%.4x\n", word, PCI_IO_BASE_UPPER16);
PRINT (" IO limit upper 16 bits = 0x%.4x\n", word, PCI_IO_LIMIT_UPPER16);
PRINT (" expansion ROM base address = 0x%.8x\n", dword, PCI_ROM_ADDRESS1);
PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
PRINT (" bridge control = 0x%.4x\n", word, PCI_BRIDGE_CONTROL);
break;
case PCI_HEADER_TYPE_CARDBUS: /* PCI-to-CardBus bridge */
PRINT (" capabilities = 0x%.2x\n", byte, PCI_CB_CAPABILITY_LIST);
PRINT (" secondary status = 0x%.4x\n", word, PCI_CB_SEC_STATUS);
PRINT (" primary bus number = 0x%.2x\n", byte, PCI_CB_PRIMARY_BUS);
PRINT (" CardBus number = 0x%.2x\n", byte, PCI_CB_CARD_BUS);
PRINT (" subordinate bus number = 0x%.2x\n", byte, PCI_CB_SUBORDINATE_BUS);
PRINT (" CardBus latency timer = 0x%.2x\n", byte, PCI_CB_LATENCY_TIMER);
PRINT (" CardBus memory base 0 = 0x%.8x\n", dword, PCI_CB_MEMORY_BASE_0);
PRINT (" CardBus memory limit 0 = 0x%.8x\n", dword, PCI_CB_MEMORY_LIMIT_0);
PRINT (" CardBus memory base 1 = 0x%.8x\n", dword, PCI_CB_MEMORY_BASE_1);
PRINT (" CardBus memory limit 1 = 0x%.8x\n", dword, PCI_CB_MEMORY_LIMIT_1);
PRINT (" CardBus IO base 0 = 0x%.4x\n", word, PCI_CB_IO_BASE_0);
PRINT (" CardBus IO base high 0 = 0x%.4x\n", word, PCI_CB_IO_BASE_0_HI);
PRINT (" CardBus IO limit 0 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_0);
PRINT (" CardBus IO limit high 0 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_0_HI);
PRINT (" CardBus IO base 1 = 0x%.4x\n", word, PCI_CB_IO_BASE_1);
PRINT (" CardBus IO base high 1 = 0x%.4x\n", word, PCI_CB_IO_BASE_1_HI);
PRINT (" CardBus IO limit 1 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_1);
PRINT (" CardBus IO limit high 1 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_1_HI);
PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
PRINT (" bridge control = 0x%.4x\n", word, PCI_CB_BRIDGE_CONTROL);
PRINT (" subvendor ID = 0x%.4x\n", word, PCI_CB_SUBSYSTEM_VENDOR_ID);
PRINT (" subdevice ID = 0x%.4x\n", word, PCI_CB_SUBSYSTEM_ID);
PRINT (" PC Card 16bit base address = 0x%.8x\n", dword, PCI_CB_LEGACY_MODE_BASE);
break;
default:
printf("unknown header\n");
break;
}
#undef PRINT
#undef PRINT2
}
/* Convert the "bus.device.function" identifier into a number.
*/
static pci_dev_t get_pci_dev(char* name)
{
char cnum[12];
int len, i, iold, n;
int bdfs[3] = {0,0,0};
len = strlen(name);
if (len > 8)
return -1;
for (i = 0, iold = 0, n = 0; i < len; i++) {
if (name[i] == '.') {
memcpy(cnum, &name[iold], i - iold);
cnum[i - iold] = '\0';
bdfs[n++] = simple_strtoul(cnum, NULL, 16);
iold = i + 1;
}
}
strcpy(cnum, &name[iold]);
if (n == 0)
n = 1;
bdfs[n] = simple_strtoul(cnum, NULL, 16);
return PCI_BDF(bdfs[0], bdfs[1], bdfs[2]);
}
static int pci_cfg_display(pci_dev_t bdf, ulong addr, ulong size, ulong length)
{
#define DISP_LINE_LEN 16
ulong i, nbytes, linebytes;
int rc = 0;
if (length == 0)
length = 0x40 / size; /* Standard PCI configuration space */
/* Print the lines.
* once, and all accesses are with the specified bus width.
*/
nbytes = length * size;
do {
uint val4;
ushort val2;
u_char val1;
printf("%08lx:", addr);
linebytes = (nbytes>DISP_LINE_LEN)?DISP_LINE_LEN:nbytes;
for (i=0; i<linebytes; i+= size) {
if (size == 4) {
pci_read_config_dword(bdf, addr, &val4);
printf(" %08x", val4);
} else if (size == 2) {
pci_read_config_word(bdf, addr, &val2);
printf(" %04x", val2);
} else {
pci_read_config_byte(bdf, addr, &val1);
printf(" %02x", val1);
}
addr += size;
}
printf("\n");
nbytes -= linebytes;
if (ctrlc()) {
rc = 1;
break;
}
} while (nbytes > 0);
return (rc);
}
static int pci_cfg_write (pci_dev_t bdf, ulong addr, ulong size, ulong value)
{
if (size == 4) {
pci_write_config_dword(bdf, addr, value);
}
else if (size == 2) {
ushort val = value & 0xffff;
pci_write_config_word(bdf, addr, val);
}
else {
u_char val = value & 0xff;
pci_write_config_byte(bdf, addr, val);
}
return 0;
}
static int
pci_cfg_modify (pci_dev_t bdf, ulong addr, ulong size, ulong value, int incrflag)
{
ulong i;
int nbytes;
uint val4;
ushort val2;
u_char val1;
/* Print the address, followed by value. Then accept input for
* the next value. A non-converted value exits.
*/
do {
printf("%08lx:", addr);
if (size == 4) {
pci_read_config_dword(bdf, addr, &val4);
printf(" %08x", val4);
}
else if (size == 2) {
pci_read_config_word(bdf, addr, &val2);
printf(" %04x", val2);
}
else {
pci_read_config_byte(bdf, addr, &val1);
printf(" %02x", val1);
}
nbytes = readline (" ? ");
if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
/* <CR> pressed as only input, don't modify current
* location and move to next. "-" pressed will go back.
*/
if (incrflag)
addr += nbytes ? -size : size;
nbytes = 1;
#ifdef CONFIG_BOOT_RETRY_TIME
reset_cmd_timeout(); /* good enough to not time out */
#endif
}
#ifdef CONFIG_BOOT_RETRY_TIME
else if (nbytes == -2) {
break; /* timed out, exit the command */
}
#endif
else {
char *endp;
i = simple_strtoul(console_buffer, &endp, 16);
nbytes = endp - console_buffer;
if (nbytes) {
#ifdef CONFIG_BOOT_RETRY_TIME
/* good enough to not time out
*/
reset_cmd_timeout();
#endif
pci_cfg_write (bdf, addr, size, i);
if (incrflag)
addr += size;
}
}
} while (nbytes);
return 0;
}
/* PCI Configuration Space access commands
*
* Syntax:
* pci display[.b, .w, .l] bus.device.function} [addr] [len]
* pci next[.b, .w, .l] bus.device.function [addr]
* pci modify[.b, .w, .l] bus.device.function [addr]
* pci write[.b, .w, .l] bus.device.function addr value
*/
int do_pci (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
ulong addr = 0, value = 0, size = 0;
pci_dev_t bdf = 0;
char cmd = 's';
if (argc > 1)
cmd = argv[1][0];
switch (cmd) {
case 'd': /* display */
case 'n': /* next */
case 'm': /* modify */
case 'w': /* write */
/* Check for a size specification. */
size = cmd_get_data_size(argv[1], 4);
if (argc > 3)
addr = simple_strtoul(argv[3], NULL, 16);
if (argc > 4)
value = simple_strtoul(argv[4], NULL, 16);
case 'h': /* header */
if (argc < 3)
goto usage;
if ((bdf = get_pci_dev(argv[2])) == -1)
return 1;
break;
#ifdef CONFIG_CMD_PCI_ENUM
case 'e':
break;
#endif
default: /* scan bus */
value = 1; /* short listing */
bdf = 0; /* bus number */
if (argc > 1) {
if (argv[argc-1][0] == 'l') {
value = 0;
argc--;
}
if (argc > 1)
bdf = simple_strtoul(argv[1], NULL, 16);
}
pciinfo(bdf, value);
return 0;
}
switch (argv[1][0]) {
case 'h': /* header */
pci_header_show(bdf);
return 0;
case 'd': /* display */
return pci_cfg_display(bdf, addr, size, value);
#ifdef CONFIG_CMD_PCI_ENUM
case 'e':
pci_init();
return 0;
#endif
case 'n': /* next */
if (argc < 4)
goto usage;
return pci_cfg_modify(bdf, addr, size, value, 0);
case 'm': /* modify */
if (argc < 4)
goto usage;
return pci_cfg_modify(bdf, addr, size, value, 1);
case 'w': /* write */
if (argc < 5)
goto usage;
return pci_cfg_write(bdf, addr, size, value);
}
return 1;
usage:
return CMD_RET_USAGE;
}
/***************************************************/
U_BOOT_CMD(
pci, 5, 1, do_pci,
"list and access PCI Configuration Space",
"[bus] [long]\n"
" - short or long list of PCI devices on bus 'bus'\n"
#ifdef CONFIG_CMD_PCI_ENUM
"pci enum\n"
" - re-enumerate PCI buses\n"
#endif
"pci header b.d.f\n"
" - show header of PCI device 'bus.device.function'\n"
"pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
" - display PCI configuration space (CFG)\n"
"pci next[.b, .w, .l] b.d.f address\n"
" - modify, read and keep CFG address\n"
"pci modify[.b, .w, .l] b.d.f address\n"
" - modify, auto increment CFG address\n"
"pci write[.b, .w, .l] b.d.f address value\n"
" - write to CFG address"
);
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