2 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
3 * Andreas Heppel <aheppel@sysgo.de>
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * Wolfgang Grandegger, DENX Software Engineering, wg@denx.de.
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
38 #include <asm/processor.h>
43 #if (CONFIG_COMMANDS & CFG_CMD_PCI)
45 extern int cmd_get_data_size(char* arg, int default_size);
47 unsigned char ShortPCIListing = 1;
50 * Follows routines for the output of infos about devices on PCI bus.
53 void pci_header_show(pci_dev_t dev);
54 void pci_header_show_brief(pci_dev_t dev);
59 * Description: Show information about devices on PCI bus.
60 * Depending on the define CFG_SHORT_PCI_LISTING
61 * the output will be more or less exhaustive.
63 * Inputs: bus_no the number of the bus to be scanned.
68 void pciinfo(int BusNum, int ShortPCIListing)
72 unsigned char HeaderType;
73 unsigned short VendorID;
76 printf("Scanning PCI devices on bus %d\n", BusNum);
78 if (ShortPCIListing) {
79 printf("BusDevFun VendorId DeviceId Device Class Sub-Class\n");
80 printf("_____________________________________________________________\n");
83 for (Device = 0; Device < PCI_MAX_PCI_DEVICES; Device++) {
86 for (Function = 0; Function < PCI_MAX_PCI_FUNCTIONS; Function++) {
88 * If this is not a multi-function device, we skip the rest.
90 if (Function && !(HeaderType & 0x80))
93 dev = PCI_BDF(BusNum, Device, Function);
95 pci_read_config_word(dev, PCI_VENDOR_ID, &VendorID);
96 if ((VendorID == 0xFFFF) || (VendorID == 0x0000))
99 if (!Function) pci_read_config_byte(dev, PCI_HEADER_TYPE, &HeaderType);
103 printf("%02x.%02x.%02x ", BusNum, Device, Function);
104 pci_header_show_brief(dev);
108 printf("\nFound PCI device %02x.%02x.%02x:\n",
109 BusNum, Device, Function);
110 pci_header_show(dev);
116 char* pci_classes_str(u8 class)
119 case PCI_CLASS_NOT_DEFINED:
120 return "Build before PCI Rev2.0";
122 case PCI_BASE_CLASS_STORAGE:
123 return "Mass storage controller";
125 case PCI_BASE_CLASS_NETWORK:
126 return "Network controller ";
128 case PCI_BASE_CLASS_DISPLAY:
129 return "Display controller ";
131 case PCI_BASE_CLASS_MULTIMEDIA:
132 return "Multimedia device ";
134 case PCI_BASE_CLASS_MEMORY:
135 return "Memory controller ";
137 case PCI_BASE_CLASS_BRIDGE:
138 return "Bridge device ";
140 case PCI_BASE_CLASS_COMMUNICATION:
141 return "Simple comm. controller";
143 case PCI_BASE_CLASS_SYSTEM:
144 return "Base system peripheral ";
146 case PCI_BASE_CLASS_INPUT:
147 return "Input device ";
149 case PCI_BASE_CLASS_DOCKING:
150 return "Docking station ";
152 case PCI_BASE_CLASS_PROCESSOR:
155 case PCI_BASE_CLASS_SERIAL:
156 return "Serial bus controller ";
158 case PCI_BASE_CLASS_INTELLIGENT:
159 return "Intelligent controller ";
161 case PCI_BASE_CLASS_SATELLITE:
162 return "Satellite controller ";
164 case PCI_BASE_CLASS_CRYPT:
165 return "Cryptographic device ";
167 case PCI_BASE_CLASS_SIGNAL_PROCESSING:
170 case PCI_CLASS_OTHERS:
171 return "Does not fit any class ";
180 * Subroutine: pci_header_show_brief
182 * Description: Reads and prints the header of the
183 * specified PCI device in short form.
185 * Inputs: dev Bus+Device+Function number
190 void pci_header_show_brief(pci_dev_t dev)
195 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
196 pci_read_config_word(dev, PCI_DEVICE_ID, &device);
197 pci_read_config_byte(dev, PCI_CLASS_CODE, &class);
198 pci_read_config_byte(dev, PCI_CLASS_SUB_CODE, &subclass);
200 printf("0x%.4x 0x%.4x %s 0x%.2x\n",
202 pci_classes_str(class), subclass);
206 * Subroutine: PCI_Header_Show
208 * Description: Reads the header of the specified PCI device.
210 * Inputs: BusDevFunc Bus+Device+Function number
215 void pci_header_show(pci_dev_t dev)
217 u8 _byte, header_type;
221 #define PRINT(msg, type, reg) \
222 pci_read_config_##type(dev, reg, &_##type); \
225 #define PRINT2(msg, type, reg, func) \
226 pci_read_config_##type(dev, reg, &_##type); \
227 printf(msg, _##type, func(_##type))
229 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
231 PRINT (" vendor ID = 0x%.4x\n", word, PCI_VENDOR_ID);
232 PRINT (" device ID = 0x%.4x\n", word, PCI_DEVICE_ID);
233 PRINT (" command register = 0x%.4x\n", word, PCI_COMMAND);
234 PRINT (" status register = 0x%.4x\n", word, PCI_STATUS);
235 PRINT (" revision ID = 0x%.2x\n", byte, PCI_REVISION_ID);
236 PRINT2(" class code = 0x%.2x (%s)\n", byte, PCI_CLASS_CODE,
238 PRINT (" sub class code = 0x%.2x\n", byte, PCI_CLASS_SUB_CODE);
239 PRINT (" programming interface = 0x%.2x\n", byte, PCI_CLASS_PROG);
240 PRINT (" cache line = 0x%.2x\n", byte, PCI_CACHE_LINE_SIZE);
241 PRINT (" latency time = 0x%.2x\n", byte, PCI_LATENCY_TIMER);
242 PRINT (" header type = 0x%.2x\n", byte, PCI_HEADER_TYPE);
243 PRINT (" BIST = 0x%.2x\n", byte, PCI_BIST);
244 PRINT (" base address 0 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_0);
246 switch (header_type & 0x03) {
247 case PCI_HEADER_TYPE_NORMAL: /* "normal" PCI device */
248 PRINT (" base address 1 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_1);
249 PRINT (" base address 2 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_2);
250 PRINT (" base address 3 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_3);
251 PRINT (" base address 4 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_4);
252 PRINT (" base address 5 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_5);
253 PRINT (" cardBus CIS pointer = 0x%.8x\n", dword, PCI_CARDBUS_CIS);
254 PRINT (" sub system vendor ID = 0x%.4x\n", word, PCI_SUBSYSTEM_VENDOR_ID);
255 PRINT (" sub system ID = 0x%.4x\n", word, PCI_SUBSYSTEM_ID);
256 PRINT (" expansion ROM base address = 0x%.8x\n", dword, PCI_ROM_ADDRESS);
257 PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
258 PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
259 PRINT (" min Grant = 0x%.2x\n", byte, PCI_MIN_GNT);
260 PRINT (" max Latency = 0x%.2x\n", byte, PCI_MAX_LAT);
263 case PCI_HEADER_TYPE_BRIDGE: /* PCI-to-PCI bridge */
265 PRINT (" base address 1 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_1);
266 PRINT (" primary bus number = 0x%.2x\n", byte, PCI_PRIMARY_BUS);
267 PRINT (" secondary bus number = 0x%.2x\n", byte, PCI_SECONDARY_BUS);
268 PRINT (" subordinate bus number = 0x%.2x\n", byte, PCI_SUBORDINATE_BUS);
269 PRINT (" secondary latency timer = 0x%.2x\n", byte, PCI_SEC_LATENCY_TIMER);
270 PRINT (" IO base = 0x%.2x\n", byte, PCI_IO_BASE);
271 PRINT (" IO limit = 0x%.2x\n", byte, PCI_IO_LIMIT);
272 PRINT (" secondary status = 0x%.4x\n", word, PCI_SEC_STATUS);
273 PRINT (" memory base = 0x%.4x\n", word, PCI_MEMORY_BASE);
274 PRINT (" memory limit = 0x%.4x\n", word, PCI_MEMORY_LIMIT);
275 PRINT (" prefetch memory base = 0x%.4x\n", word, PCI_PREF_MEMORY_BASE);
276 PRINT (" prefetch memory limit = 0x%.4x\n", word, PCI_PREF_MEMORY_LIMIT);
277 PRINT (" prefetch memory base upper = 0x%.8x\n", dword, PCI_PREF_BASE_UPPER32);
278 PRINT (" prefetch memory limit upper = 0x%.8x\n", dword, PCI_PREF_LIMIT_UPPER32);
279 PRINT (" IO base upper 16 bits = 0x%.4x\n", word, PCI_IO_BASE_UPPER16);
280 PRINT (" IO limit upper 16 bits = 0x%.4x\n", word, PCI_IO_LIMIT_UPPER16);
281 PRINT (" expansion ROM base address = 0x%.8x\n", dword, PCI_ROM_ADDRESS1);
282 PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
283 PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
284 PRINT (" bridge control = 0x%.4x\n", word, PCI_BRIDGE_CONTROL);
287 case PCI_HEADER_TYPE_CARDBUS: /* PCI-to-CardBus bridge */
289 PRINT (" capabilities = 0x%.2x\n", byte, PCI_CB_CAPABILITY_LIST);
290 PRINT (" secondary status = 0x%.4x\n", word, PCI_CB_SEC_STATUS);
291 PRINT (" primary bus number = 0x%.2x\n", byte, PCI_CB_PRIMARY_BUS);
292 PRINT (" CardBus number = 0x%.2x\n", byte, PCI_CB_CARD_BUS);
293 PRINT (" subordinate bus number = 0x%.2x\n", byte, PCI_CB_SUBORDINATE_BUS);
294 PRINT (" CardBus latency timer = 0x%.2x\n", byte, PCI_CB_LATENCY_TIMER);
295 PRINT (" CardBus memory base 0 = 0x%.8x\n", dword, PCI_CB_MEMORY_BASE_0);
296 PRINT (" CardBus memory limit 0 = 0x%.8x\n", dword, PCI_CB_MEMORY_LIMIT_0);
297 PRINT (" CardBus memory base 1 = 0x%.8x\n", dword, PCI_CB_MEMORY_BASE_1);
298 PRINT (" CardBus memory limit 1 = 0x%.8x\n", dword, PCI_CB_MEMORY_LIMIT_1);
299 PRINT (" CardBus IO base 0 = 0x%.4x\n", word, PCI_CB_IO_BASE_0);
300 PRINT (" CardBus IO base high 0 = 0x%.4x\n", word, PCI_CB_IO_BASE_0_HI);
301 PRINT (" CardBus IO limit 0 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_0);
302 PRINT (" CardBus IO limit high 0 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_0_HI);
303 PRINT (" CardBus IO base 1 = 0x%.4x\n", word, PCI_CB_IO_BASE_1);
304 PRINT (" CardBus IO base high 1 = 0x%.4x\n", word, PCI_CB_IO_BASE_1_HI);
305 PRINT (" CardBus IO limit 1 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_1);
306 PRINT (" CardBus IO limit high 1 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_1_HI);
307 PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
308 PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
309 PRINT (" bridge control = 0x%.4x\n", word, PCI_CB_BRIDGE_CONTROL);
310 PRINT (" subvendor ID = 0x%.4x\n", word, PCI_CB_SUBSYSTEM_VENDOR_ID);
311 PRINT (" subdevice ID = 0x%.4x\n", word, PCI_CB_SUBSYSTEM_ID);
312 PRINT (" PC Card 16bit base address = 0x%.8x\n", dword, PCI_CB_LEGACY_MODE_BASE);
316 printf("unknown header\n");
324 /* Convert the "bus.device.function" identifier into a number.
326 static pci_dev_t get_pci_dev(char* name)
330 int bdfs[3] = {0,0,0};
335 for (i = 0, iold = 0, n = 0; i < len; i++) {
336 if (name[i] == '.') {
337 memcpy(cnum, &name[iold], i - iold);
338 cnum[i - iold] = '\0';
339 bdfs[n++] = simple_strtoul(cnum, NULL, 16);
343 strcpy(cnum, &name[iold]);
346 bdfs[n] = simple_strtoul(cnum, NULL, 16);
347 return PCI_BDF(bdfs[0], bdfs[1], bdfs[2]);
350 static int pci_cfg_display(pci_dev_t bdf, ulong addr, ulong size, ulong length)
352 #define DISP_LINE_LEN 16
353 ulong i, nbytes, linebytes;
357 length = 0x40 / size; /* Standard PCI configuration space */
360 * once, and all accesses are with the specified bus width.
362 nbytes = length * size;
368 printf("%08lx:", addr);
369 linebytes = (nbytes>DISP_LINE_LEN)?DISP_LINE_LEN:nbytes;
370 for (i=0; i<linebytes; i+= size) {
372 pci_read_config_dword(bdf, addr, &val4);
373 printf(" %08x", val4);
374 } else if (size == 2) {
375 pci_read_config_word(bdf, addr, &val2);
376 printf(" %04x", val2);
378 pci_read_config_byte(bdf, addr, &val1);
379 printf(" %02x", val1);
389 } while (nbytes > 0);
394 static int pci_cfg_write (pci_dev_t bdf, ulong addr, ulong size, ulong value)
397 pci_write_config_dword(bdf, addr, value);
399 else if (size == 2) {
400 ushort val = value & 0xffff;
401 pci_write_config_word(bdf, addr, val);
404 u_char val = value & 0xff;
405 pci_write_config_byte(bdf, addr, val);
411 pci_cfg_modify (pci_dev_t bdf, ulong addr, ulong size, ulong value, int incrflag)
415 extern char console_buffer[];
420 /* Print the address, followed by value. Then accept input for
421 * the next value. A non-converted value exits.
424 printf("%08lx:", addr);
426 pci_read_config_dword(bdf, addr, &val4);
427 printf(" %08x", val4);
429 else if (size == 2) {
430 pci_read_config_word(bdf, addr, &val2);
431 printf(" %04x", val2);
434 pci_read_config_byte(bdf, addr, &val1);
435 printf(" %02x", val1);
438 nbytes = readline (" ? ");
439 if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
440 /* <CR> pressed as only input, don't modify current
441 * location and move to next. "-" pressed will go back.
444 addr += nbytes ? -size : size;
446 #ifdef CONFIG_BOOT_RETRY_TIME
447 reset_cmd_timeout(); /* good enough to not time out */
450 #ifdef CONFIG_BOOT_RETRY_TIME
451 else if (nbytes == -2) {
452 break; /* timed out, exit the command */
457 i = simple_strtoul(console_buffer, &endp, 16);
458 nbytes = endp - console_buffer;
460 #ifdef CONFIG_BOOT_RETRY_TIME
461 /* good enough to not time out
465 pci_cfg_write (bdf, addr, size, i);
475 /* PCI Configuration Space access commands
478 * pci display[.b, .w, .l] bus.device.function} [addr] [len]
479 * pci next[.b, .w, .l] bus.device.function [addr]
480 * pci modify[.b, .w, .l] bus.device.function [addr]
481 * pci write[.b, .w, .l] bus.device.function addr value
483 int do_pci (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
485 ulong addr = 0, value = 0, size = 0;
493 case 'd': /* display */
495 case 'm': /* modify */
496 case 'w': /* write */
497 /* Check for a size specification. */
498 size = cmd_get_data_size(argv[1], 4);
500 addr = simple_strtoul(argv[3], NULL, 16);
502 value = simple_strtoul(argv[4], NULL, 16);
503 case 'h': /* header */
506 if ((bdf = get_pci_dev(argv[2])) == -1)
509 default: /* scan bus */
510 value = 1; /* short listing */
511 bdf = 0; /* bus number */
513 if (argv[argc-1][0] == 'l') {
518 bdf = simple_strtoul(argv[1], NULL, 16);
524 switch (argv[1][0]) {
525 case 'h': /* header */
526 pci_header_show(bdf);
528 case 'd': /* display */
529 return pci_cfg_display(bdf, addr, size, value);
533 return pci_cfg_modify(bdf, addr, size, value, 0);
534 case 'm': /* modify */
537 return pci_cfg_modify(bdf, addr, size, value, 1);
538 case 'w': /* write */
541 return pci_cfg_write(bdf, addr, size, value);
546 printf ("Usage:\n%s\n", cmdtp->usage);
550 #endif /* (CONFIG_COMMANDS & CFG_CMD_PCI) */
552 #endif /* CONFIG_PCI */