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,
37 #include <asm/processor.h>
41 #if (CONFIG_COMMANDS & CFG_CMD_PCI)
43 extern int cmd_get_data_size(char* arg, int default_size);
45 unsigned char ShortPCIListing = 1;
48 * Follows routines for the output of infos about devices on PCI bus.
51 void pci_header_show(pci_dev_t dev);
52 void pci_header_show_brief(pci_dev_t dev);
57 * Description: Show information about devices on PCI bus.
58 * Depending on the define CFG_SHORT_PCI_LISTING
59 * the output will be more or less exhaustive.
61 * Inputs: bus_no the number of the bus to be scanned.
66 void pciinfo(int BusNum, int ShortPCIListing)
70 unsigned char HeaderType;
71 unsigned short VendorID;
74 printf("Scanning PCI devices on bus %d\n", BusNum);
76 if (ShortPCIListing) {
77 printf("BusDevFun VendorId DeviceId Device Class Sub-Class\n");
78 printf("_____________________________________________________________\n");
81 for (Device = 0; Device < PCI_MAX_PCI_DEVICES; Device++) {
84 for (Function = 0; Function < PCI_MAX_PCI_FUNCTIONS; Function++) {
86 * If this is not a multi-function device, we skip the rest.
88 if (Function && !(HeaderType & 0x80))
91 dev = PCI_BDF(BusNum, Device, Function);
93 pci_read_config_word(dev, PCI_VENDOR_ID, &VendorID);
94 if ((VendorID == 0xFFFF) || (VendorID == 0x0000))
97 if (!Function) pci_read_config_byte(dev, PCI_HEADER_TYPE, &HeaderType);
101 printf("%02x.%02x.%02x ", BusNum, Device, Function);
102 pci_header_show_brief(dev);
106 printf("\nFound PCI device %02x.%02x.%02x:\n",
107 BusNum, Device, Function);
108 pci_header_show(dev);
114 static char *pci_classes_str(u8 class)
117 case PCI_CLASS_NOT_DEFINED:
118 return "Build before PCI Rev2.0";
120 case PCI_BASE_CLASS_STORAGE:
121 return "Mass storage controller";
123 case PCI_BASE_CLASS_NETWORK:
124 return "Network controller";
126 case PCI_BASE_CLASS_DISPLAY:
127 return "Display controller";
129 case PCI_BASE_CLASS_MULTIMEDIA:
130 return "Multimedia device";
132 case PCI_BASE_CLASS_MEMORY:
133 return "Memory controller";
135 case PCI_BASE_CLASS_BRIDGE:
136 return "Bridge device";
138 case PCI_BASE_CLASS_COMMUNICATION:
139 return "Simple comm. controller";
141 case PCI_BASE_CLASS_SYSTEM:
142 return "Base system peripheral";
144 case PCI_BASE_CLASS_INPUT:
145 return "Input device";
147 case PCI_BASE_CLASS_DOCKING:
148 return "Docking station";
150 case PCI_BASE_CLASS_PROCESSOR:
153 case PCI_BASE_CLASS_SERIAL:
154 return "Serial bus controller";
156 case PCI_BASE_CLASS_INTELLIGENT:
157 return "Intelligent controller";
159 case PCI_BASE_CLASS_SATELLITE:
160 return "Satellite controller";
162 case PCI_BASE_CLASS_CRYPT:
163 return "Cryptographic device";
165 case PCI_BASE_CLASS_SIGNAL_PROCESSING:
168 case PCI_CLASS_OTHERS:
169 return "Does not fit any class";
178 * Subroutine: pci_header_show_brief
180 * Description: Reads and prints the header of the
181 * specified PCI device in short form.
183 * Inputs: dev Bus+Device+Function number
188 void pci_header_show_brief(pci_dev_t dev)
193 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
194 pci_read_config_word(dev, PCI_DEVICE_ID, &device);
195 pci_read_config_byte(dev, PCI_CLASS_CODE, &class);
196 pci_read_config_byte(dev, PCI_CLASS_SUB_CODE, &subclass);
198 printf("0x%.4x 0x%.4x %-23s 0x%.2x\n",
200 pci_classes_str(class), subclass);
204 * Subroutine: PCI_Header_Show
206 * Description: Reads the header of the specified PCI device.
208 * Inputs: BusDevFunc Bus+Device+Function number
213 void pci_header_show(pci_dev_t dev)
215 u8 _byte, header_type;
219 #define PRINT(msg, type, reg) \
220 pci_read_config_##type(dev, reg, &_##type); \
223 #define PRINT2(msg, type, reg, func) \
224 pci_read_config_##type(dev, reg, &_##type); \
225 printf(msg, _##type, func(_##type))
227 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
229 PRINT (" vendor ID = 0x%.4x\n", word, PCI_VENDOR_ID);
230 PRINT (" device ID = 0x%.4x\n", word, PCI_DEVICE_ID);
231 PRINT (" command register = 0x%.4x\n", word, PCI_COMMAND);
232 PRINT (" status register = 0x%.4x\n", word, PCI_STATUS);
233 PRINT (" revision ID = 0x%.2x\n", byte, PCI_REVISION_ID);
234 PRINT2(" class code = 0x%.2x (%s)\n", byte, PCI_CLASS_CODE,
236 PRINT (" sub class code = 0x%.2x\n", byte, PCI_CLASS_SUB_CODE);
237 PRINT (" programming interface = 0x%.2x\n", byte, PCI_CLASS_PROG);
238 PRINT (" cache line = 0x%.2x\n", byte, PCI_CACHE_LINE_SIZE);
239 PRINT (" latency time = 0x%.2x\n", byte, PCI_LATENCY_TIMER);
240 PRINT (" header type = 0x%.2x\n", byte, PCI_HEADER_TYPE);
241 PRINT (" BIST = 0x%.2x\n", byte, PCI_BIST);
242 PRINT (" base address 0 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_0);
244 switch (header_type & 0x03) {
245 case PCI_HEADER_TYPE_NORMAL: /* "normal" PCI device */
246 PRINT (" base address 1 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_1);
247 PRINT (" base address 2 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_2);
248 PRINT (" base address 3 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_3);
249 PRINT (" base address 4 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_4);
250 PRINT (" base address 5 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_5);
251 PRINT (" cardBus CIS pointer = 0x%.8x\n", dword, PCI_CARDBUS_CIS);
252 PRINT (" sub system vendor ID = 0x%.4x\n", word, PCI_SUBSYSTEM_VENDOR_ID);
253 PRINT (" sub system ID = 0x%.4x\n", word, PCI_SUBSYSTEM_ID);
254 PRINT (" expansion ROM base address = 0x%.8x\n", dword, PCI_ROM_ADDRESS);
255 PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
256 PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
257 PRINT (" min Grant = 0x%.2x\n", byte, PCI_MIN_GNT);
258 PRINT (" max Latency = 0x%.2x\n", byte, PCI_MAX_LAT);
261 case PCI_HEADER_TYPE_BRIDGE: /* PCI-to-PCI bridge */
263 PRINT (" base address 1 = 0x%.8x\n", dword, PCI_BASE_ADDRESS_1);
264 PRINT (" primary bus number = 0x%.2x\n", byte, PCI_PRIMARY_BUS);
265 PRINT (" secondary bus number = 0x%.2x\n", byte, PCI_SECONDARY_BUS);
266 PRINT (" subordinate bus number = 0x%.2x\n", byte, PCI_SUBORDINATE_BUS);
267 PRINT (" secondary latency timer = 0x%.2x\n", byte, PCI_SEC_LATENCY_TIMER);
268 PRINT (" IO base = 0x%.2x\n", byte, PCI_IO_BASE);
269 PRINT (" IO limit = 0x%.2x\n", byte, PCI_IO_LIMIT);
270 PRINT (" secondary status = 0x%.4x\n", word, PCI_SEC_STATUS);
271 PRINT (" memory base = 0x%.4x\n", word, PCI_MEMORY_BASE);
272 PRINT (" memory limit = 0x%.4x\n", word, PCI_MEMORY_LIMIT);
273 PRINT (" prefetch memory base = 0x%.4x\n", word, PCI_PREF_MEMORY_BASE);
274 PRINT (" prefetch memory limit = 0x%.4x\n", word, PCI_PREF_MEMORY_LIMIT);
275 PRINT (" prefetch memory base upper = 0x%.8x\n", dword, PCI_PREF_BASE_UPPER32);
276 PRINT (" prefetch memory limit upper = 0x%.8x\n", dword, PCI_PREF_LIMIT_UPPER32);
277 PRINT (" IO base upper 16 bits = 0x%.4x\n", word, PCI_IO_BASE_UPPER16);
278 PRINT (" IO limit upper 16 bits = 0x%.4x\n", word, PCI_IO_LIMIT_UPPER16);
279 PRINT (" expansion ROM base address = 0x%.8x\n", dword, PCI_ROM_ADDRESS1);
280 PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
281 PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
282 PRINT (" bridge control = 0x%.4x\n", word, PCI_BRIDGE_CONTROL);
285 case PCI_HEADER_TYPE_CARDBUS: /* PCI-to-CardBus bridge */
287 PRINT (" capabilities = 0x%.2x\n", byte, PCI_CB_CAPABILITY_LIST);
288 PRINT (" secondary status = 0x%.4x\n", word, PCI_CB_SEC_STATUS);
289 PRINT (" primary bus number = 0x%.2x\n", byte, PCI_CB_PRIMARY_BUS);
290 PRINT (" CardBus number = 0x%.2x\n", byte, PCI_CB_CARD_BUS);
291 PRINT (" subordinate bus number = 0x%.2x\n", byte, PCI_CB_SUBORDINATE_BUS);
292 PRINT (" CardBus latency timer = 0x%.2x\n", byte, PCI_CB_LATENCY_TIMER);
293 PRINT (" CardBus memory base 0 = 0x%.8x\n", dword, PCI_CB_MEMORY_BASE_0);
294 PRINT (" CardBus memory limit 0 = 0x%.8x\n", dword, PCI_CB_MEMORY_LIMIT_0);
295 PRINT (" CardBus memory base 1 = 0x%.8x\n", dword, PCI_CB_MEMORY_BASE_1);
296 PRINT (" CardBus memory limit 1 = 0x%.8x\n", dword, PCI_CB_MEMORY_LIMIT_1);
297 PRINT (" CardBus IO base 0 = 0x%.4x\n", word, PCI_CB_IO_BASE_0);
298 PRINT (" CardBus IO base high 0 = 0x%.4x\n", word, PCI_CB_IO_BASE_0_HI);
299 PRINT (" CardBus IO limit 0 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_0);
300 PRINT (" CardBus IO limit high 0 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_0_HI);
301 PRINT (" CardBus IO base 1 = 0x%.4x\n", word, PCI_CB_IO_BASE_1);
302 PRINT (" CardBus IO base high 1 = 0x%.4x\n", word, PCI_CB_IO_BASE_1_HI);
303 PRINT (" CardBus IO limit 1 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_1);
304 PRINT (" CardBus IO limit high 1 = 0x%.4x\n", word, PCI_CB_IO_LIMIT_1_HI);
305 PRINT (" interrupt line = 0x%.2x\n", byte, PCI_INTERRUPT_LINE);
306 PRINT (" interrupt pin = 0x%.2x\n", byte, PCI_INTERRUPT_PIN);
307 PRINT (" bridge control = 0x%.4x\n", word, PCI_CB_BRIDGE_CONTROL);
308 PRINT (" subvendor ID = 0x%.4x\n", word, PCI_CB_SUBSYSTEM_VENDOR_ID);
309 PRINT (" subdevice ID = 0x%.4x\n", word, PCI_CB_SUBSYSTEM_ID);
310 PRINT (" PC Card 16bit base address = 0x%.8x\n", dword, PCI_CB_LEGACY_MODE_BASE);
314 printf("unknown header\n");
322 /* Convert the "bus.device.function" identifier into a number.
324 static pci_dev_t get_pci_dev(char* name)
328 int bdfs[3] = {0,0,0};
333 for (i = 0, iold = 0, n = 0; i < len; i++) {
334 if (name[i] == '.') {
335 memcpy(cnum, &name[iold], i - iold);
336 cnum[i - iold] = '\0';
337 bdfs[n++] = simple_strtoul(cnum, NULL, 16);
341 strcpy(cnum, &name[iold]);
344 bdfs[n] = simple_strtoul(cnum, NULL, 16);
345 return PCI_BDF(bdfs[0], bdfs[1], bdfs[2]);
348 static int pci_cfg_display(pci_dev_t bdf, ulong addr, ulong size, ulong length)
350 #define DISP_LINE_LEN 16
351 ulong i, nbytes, linebytes;
355 length = 0x40 / size; /* Standard PCI configuration space */
358 * once, and all accesses are with the specified bus width.
360 nbytes = length * size;
366 printf("%08lx:", addr);
367 linebytes = (nbytes>DISP_LINE_LEN)?DISP_LINE_LEN:nbytes;
368 for (i=0; i<linebytes; i+= size) {
370 pci_read_config_dword(bdf, addr, &val4);
371 printf(" %08x", val4);
372 } else if (size == 2) {
373 pci_read_config_word(bdf, addr, &val2);
374 printf(" %04x", val2);
376 pci_read_config_byte(bdf, addr, &val1);
377 printf(" %02x", val1);
387 } while (nbytes > 0);
392 static int pci_cfg_write (pci_dev_t bdf, ulong addr, ulong size, ulong value)
395 pci_write_config_dword(bdf, addr, value);
397 else if (size == 2) {
398 ushort val = value & 0xffff;
399 pci_write_config_word(bdf, addr, val);
402 u_char val = value & 0xff;
403 pci_write_config_byte(bdf, addr, val);
409 pci_cfg_modify (pci_dev_t bdf, ulong addr, ulong size, ulong value, int incrflag)
413 extern char console_buffer[];
418 /* Print the address, followed by value. Then accept input for
419 * the next value. A non-converted value exits.
422 printf("%08lx:", addr);
424 pci_read_config_dword(bdf, addr, &val4);
425 printf(" %08x", val4);
427 else if (size == 2) {
428 pci_read_config_word(bdf, addr, &val2);
429 printf(" %04x", val2);
432 pci_read_config_byte(bdf, addr, &val1);
433 printf(" %02x", val1);
436 nbytes = readline (" ? ");
437 if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
438 /* <CR> pressed as only input, don't modify current
439 * location and move to next. "-" pressed will go back.
442 addr += nbytes ? -size : size;
444 #ifdef CONFIG_BOOT_RETRY_TIME
445 reset_cmd_timeout(); /* good enough to not time out */
448 #ifdef CONFIG_BOOT_RETRY_TIME
449 else if (nbytes == -2) {
450 break; /* timed out, exit the command */
455 i = simple_strtoul(console_buffer, &endp, 16);
456 nbytes = endp - console_buffer;
458 #ifdef CONFIG_BOOT_RETRY_TIME
459 /* good enough to not time out
463 pci_cfg_write (bdf, addr, size, i);
473 /* PCI Configuration Space access commands
476 * pci display[.b, .w, .l] bus.device.function} [addr] [len]
477 * pci next[.b, .w, .l] bus.device.function [addr]
478 * pci modify[.b, .w, .l] bus.device.function [addr]
479 * pci write[.b, .w, .l] bus.device.function addr value
481 int do_pci (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
483 ulong addr = 0, value = 0, size = 0;
491 case 'd': /* display */
493 case 'm': /* modify */
494 case 'w': /* write */
495 /* Check for a size specification. */
496 size = cmd_get_data_size(argv[1], 4);
498 addr = simple_strtoul(argv[3], NULL, 16);
500 value = simple_strtoul(argv[4], NULL, 16);
501 case 'h': /* header */
504 if ((bdf = get_pci_dev(argv[2])) == -1)
507 default: /* scan bus */
508 value = 1; /* short listing */
509 bdf = 0; /* bus number */
511 if (argv[argc-1][0] == 'l') {
516 bdf = simple_strtoul(argv[1], NULL, 16);
522 switch (argv[1][0]) {
523 case 'h': /* header */
524 pci_header_show(bdf);
526 case 'd': /* display */
527 return pci_cfg_display(bdf, addr, size, value);
531 return pci_cfg_modify(bdf, addr, size, value, 0);
532 case 'm': /* modify */
535 return pci_cfg_modify(bdf, addr, size, value, 1);
536 case 'w': /* write */
539 return pci_cfg_write(bdf, addr, size, value);
544 printf ("Usage:\n%s\n", cmdtp->usage);
548 /***************************************************/
553 "pci - list and access PCI Configuration Space\n",
555 " - short or long list of PCI devices on bus 'bus'\n"
557 " - show header of PCI device 'bus.device.function'\n"
558 "pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
559 " - display PCI configuration space (CFG)\n"
560 "pci next[.b, .w, .l] b.d.f address\n"
561 " - modify, read and keep CFG address\n"
562 "pci modify[.b, .w, .l] b.d.f address\n"
563 " - modify, auto increment CFG address\n"
564 "pci write[.b, .w, .l] b.d.f address value\n"
565 " - write to CFG address\n"
568 #endif /* (CONFIG_COMMANDS & CFG_CMD_PCI) */
570 #endif /* CONFIG_PCI */