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,
34 #include <asm/processor.h>
38 unsigned char ShortPCIListing
= 1;
41 * Follows routines for the output of infos about devices on PCI bus.
44 void pci_header_show(pci_dev_t dev
);
45 void pci_header_show_brief(pci_dev_t dev
);
50 * Description: Show information about devices on PCI bus.
51 * Depending on the define CONFIG_SYS_SHORT_PCI_LISTING
52 * the output will be more or less exhaustive.
54 * Inputs: bus_no the number of the bus to be scanned.
59 void pciinfo(int BusNum
, int ShortPCIListing
)
63 unsigned char HeaderType
;
64 unsigned short VendorID
;
67 printf("Scanning PCI devices on bus %d\n", BusNum
);
69 if (ShortPCIListing
) {
70 printf("BusDevFun VendorId DeviceId Device Class Sub-Class\n");
71 printf("_____________________________________________________________\n");
74 for (Device
= 0; Device
< PCI_MAX_PCI_DEVICES
; Device
++) {
77 for (Function
= 0; Function
< PCI_MAX_PCI_FUNCTIONS
; Function
++) {
79 * If this is not a multi-function device, we skip the rest.
81 if (Function
&& !(HeaderType
& 0x80))
84 dev
= PCI_BDF(BusNum
, Device
, Function
);
86 pci_read_config_word(dev
, PCI_VENDOR_ID
, &VendorID
);
87 if ((VendorID
== 0xFFFF) || (VendorID
== 0x0000))
90 if (!Function
) pci_read_config_byte(dev
, PCI_HEADER_TYPE
, &HeaderType
);
94 printf("%02x.%02x.%02x ", BusNum
, Device
, Function
);
95 pci_header_show_brief(dev
);
99 printf("\nFound PCI device %02x.%02x.%02x:\n",
100 BusNum
, Device
, Function
);
101 pci_header_show(dev
);
107 static char *pci_classes_str(u8
class)
110 case PCI_CLASS_NOT_DEFINED
:
111 return "Build before PCI Rev2.0";
113 case PCI_BASE_CLASS_STORAGE
:
114 return "Mass storage controller";
116 case PCI_BASE_CLASS_NETWORK
:
117 return "Network controller";
119 case PCI_BASE_CLASS_DISPLAY
:
120 return "Display controller";
122 case PCI_BASE_CLASS_MULTIMEDIA
:
123 return "Multimedia device";
125 case PCI_BASE_CLASS_MEMORY
:
126 return "Memory controller";
128 case PCI_BASE_CLASS_BRIDGE
:
129 return "Bridge device";
131 case PCI_BASE_CLASS_COMMUNICATION
:
132 return "Simple comm. controller";
134 case PCI_BASE_CLASS_SYSTEM
:
135 return "Base system peripheral";
137 case PCI_BASE_CLASS_INPUT
:
138 return "Input device";
140 case PCI_BASE_CLASS_DOCKING
:
141 return "Docking station";
143 case PCI_BASE_CLASS_PROCESSOR
:
146 case PCI_BASE_CLASS_SERIAL
:
147 return "Serial bus controller";
149 case PCI_BASE_CLASS_INTELLIGENT
:
150 return "Intelligent controller";
152 case PCI_BASE_CLASS_SATELLITE
:
153 return "Satellite controller";
155 case PCI_BASE_CLASS_CRYPT
:
156 return "Cryptographic device";
158 case PCI_BASE_CLASS_SIGNAL_PROCESSING
:
161 case PCI_CLASS_OTHERS
:
162 return "Does not fit any class";
171 * Subroutine: pci_header_show_brief
173 * Description: Reads and prints the header of the
174 * specified PCI device in short form.
176 * Inputs: dev Bus+Device+Function number
181 void pci_header_show_brief(pci_dev_t dev
)
186 pci_read_config_word(dev
, PCI_VENDOR_ID
, &vendor
);
187 pci_read_config_word(dev
, PCI_DEVICE_ID
, &device
);
188 pci_read_config_byte(dev
, PCI_CLASS_CODE
, &class);
189 pci_read_config_byte(dev
, PCI_CLASS_SUB_CODE
, &subclass
);
191 printf("0x%.4x 0x%.4x %-23s 0x%.2x\n",
193 pci_classes_str(class), subclass
);
197 * Subroutine: PCI_Header_Show
199 * Description: Reads the header of the specified PCI device.
201 * Inputs: BusDevFunc Bus+Device+Function number
206 void pci_header_show(pci_dev_t dev
)
208 u8 _byte
, header_type
;
212 #define PRINT(msg, type, reg) \
213 pci_read_config_##type(dev, reg, &_##type); \
216 #define PRINT2(msg, type, reg, func) \
217 pci_read_config_##type(dev, reg, &_##type); \
218 printf(msg, _##type, func(_##type))
220 pci_read_config_byte(dev
, PCI_HEADER_TYPE
, &header_type
);
222 PRINT (" vendor ID = 0x%.4x\n", word
, PCI_VENDOR_ID
);
223 PRINT (" device ID = 0x%.4x\n", word
, PCI_DEVICE_ID
);
224 PRINT (" command register = 0x%.4x\n", word
, PCI_COMMAND
);
225 PRINT (" status register = 0x%.4x\n", word
, PCI_STATUS
);
226 PRINT (" revision ID = 0x%.2x\n", byte
, PCI_REVISION_ID
);
227 PRINT2(" class code = 0x%.2x (%s)\n", byte
, PCI_CLASS_CODE
,
229 PRINT (" sub class code = 0x%.2x\n", byte
, PCI_CLASS_SUB_CODE
);
230 PRINT (" programming interface = 0x%.2x\n", byte
, PCI_CLASS_PROG
);
231 PRINT (" cache line = 0x%.2x\n", byte
, PCI_CACHE_LINE_SIZE
);
232 PRINT (" latency time = 0x%.2x\n", byte
, PCI_LATENCY_TIMER
);
233 PRINT (" header type = 0x%.2x\n", byte
, PCI_HEADER_TYPE
);
234 PRINT (" BIST = 0x%.2x\n", byte
, PCI_BIST
);
235 PRINT (" base address 0 = 0x%.8x\n", dword
, PCI_BASE_ADDRESS_0
);
237 switch (header_type
& 0x03) {
238 case PCI_HEADER_TYPE_NORMAL
: /* "normal" PCI device */
239 PRINT (" base address 1 = 0x%.8x\n", dword
, PCI_BASE_ADDRESS_1
);
240 PRINT (" base address 2 = 0x%.8x\n", dword
, PCI_BASE_ADDRESS_2
);
241 PRINT (" base address 3 = 0x%.8x\n", dword
, PCI_BASE_ADDRESS_3
);
242 PRINT (" base address 4 = 0x%.8x\n", dword
, PCI_BASE_ADDRESS_4
);
243 PRINT (" base address 5 = 0x%.8x\n", dword
, PCI_BASE_ADDRESS_5
);
244 PRINT (" cardBus CIS pointer = 0x%.8x\n", dword
, PCI_CARDBUS_CIS
);
245 PRINT (" sub system vendor ID = 0x%.4x\n", word
, PCI_SUBSYSTEM_VENDOR_ID
);
246 PRINT (" sub system ID = 0x%.4x\n", word
, PCI_SUBSYSTEM_ID
);
247 PRINT (" expansion ROM base address = 0x%.8x\n", dword
, PCI_ROM_ADDRESS
);
248 PRINT (" interrupt line = 0x%.2x\n", byte
, PCI_INTERRUPT_LINE
);
249 PRINT (" interrupt pin = 0x%.2x\n", byte
, PCI_INTERRUPT_PIN
);
250 PRINT (" min Grant = 0x%.2x\n", byte
, PCI_MIN_GNT
);
251 PRINT (" max Latency = 0x%.2x\n", byte
, PCI_MAX_LAT
);
254 case PCI_HEADER_TYPE_BRIDGE
: /* PCI-to-PCI bridge */
256 PRINT (" base address 1 = 0x%.8x\n", dword
, PCI_BASE_ADDRESS_1
);
257 PRINT (" primary bus number = 0x%.2x\n", byte
, PCI_PRIMARY_BUS
);
258 PRINT (" secondary bus number = 0x%.2x\n", byte
, PCI_SECONDARY_BUS
);
259 PRINT (" subordinate bus number = 0x%.2x\n", byte
, PCI_SUBORDINATE_BUS
);
260 PRINT (" secondary latency timer = 0x%.2x\n", byte
, PCI_SEC_LATENCY_TIMER
);
261 PRINT (" IO base = 0x%.2x\n", byte
, PCI_IO_BASE
);
262 PRINT (" IO limit = 0x%.2x\n", byte
, PCI_IO_LIMIT
);
263 PRINT (" secondary status = 0x%.4x\n", word
, PCI_SEC_STATUS
);
264 PRINT (" memory base = 0x%.4x\n", word
, PCI_MEMORY_BASE
);
265 PRINT (" memory limit = 0x%.4x\n", word
, PCI_MEMORY_LIMIT
);
266 PRINT (" prefetch memory base = 0x%.4x\n", word
, PCI_PREF_MEMORY_BASE
);
267 PRINT (" prefetch memory limit = 0x%.4x\n", word
, PCI_PREF_MEMORY_LIMIT
);
268 PRINT (" prefetch memory base upper = 0x%.8x\n", dword
, PCI_PREF_BASE_UPPER32
);
269 PRINT (" prefetch memory limit upper = 0x%.8x\n", dword
, PCI_PREF_LIMIT_UPPER32
);
270 PRINT (" IO base upper 16 bits = 0x%.4x\n", word
, PCI_IO_BASE_UPPER16
);
271 PRINT (" IO limit upper 16 bits = 0x%.4x\n", word
, PCI_IO_LIMIT_UPPER16
);
272 PRINT (" expansion ROM base address = 0x%.8x\n", dword
, PCI_ROM_ADDRESS1
);
273 PRINT (" interrupt line = 0x%.2x\n", byte
, PCI_INTERRUPT_LINE
);
274 PRINT (" interrupt pin = 0x%.2x\n", byte
, PCI_INTERRUPT_PIN
);
275 PRINT (" bridge control = 0x%.4x\n", word
, PCI_BRIDGE_CONTROL
);
278 case PCI_HEADER_TYPE_CARDBUS
: /* PCI-to-CardBus bridge */
280 PRINT (" capabilities = 0x%.2x\n", byte
, PCI_CB_CAPABILITY_LIST
);
281 PRINT (" secondary status = 0x%.4x\n", word
, PCI_CB_SEC_STATUS
);
282 PRINT (" primary bus number = 0x%.2x\n", byte
, PCI_CB_PRIMARY_BUS
);
283 PRINT (" CardBus number = 0x%.2x\n", byte
, PCI_CB_CARD_BUS
);
284 PRINT (" subordinate bus number = 0x%.2x\n", byte
, PCI_CB_SUBORDINATE_BUS
);
285 PRINT (" CardBus latency timer = 0x%.2x\n", byte
, PCI_CB_LATENCY_TIMER
);
286 PRINT (" CardBus memory base 0 = 0x%.8x\n", dword
, PCI_CB_MEMORY_BASE_0
);
287 PRINT (" CardBus memory limit 0 = 0x%.8x\n", dword
, PCI_CB_MEMORY_LIMIT_0
);
288 PRINT (" CardBus memory base 1 = 0x%.8x\n", dword
, PCI_CB_MEMORY_BASE_1
);
289 PRINT (" CardBus memory limit 1 = 0x%.8x\n", dword
, PCI_CB_MEMORY_LIMIT_1
);
290 PRINT (" CardBus IO base 0 = 0x%.4x\n", word
, PCI_CB_IO_BASE_0
);
291 PRINT (" CardBus IO base high 0 = 0x%.4x\n", word
, PCI_CB_IO_BASE_0_HI
);
292 PRINT (" CardBus IO limit 0 = 0x%.4x\n", word
, PCI_CB_IO_LIMIT_0
);
293 PRINT (" CardBus IO limit high 0 = 0x%.4x\n", word
, PCI_CB_IO_LIMIT_0_HI
);
294 PRINT (" CardBus IO base 1 = 0x%.4x\n", word
, PCI_CB_IO_BASE_1
);
295 PRINT (" CardBus IO base high 1 = 0x%.4x\n", word
, PCI_CB_IO_BASE_1_HI
);
296 PRINT (" CardBus IO limit 1 = 0x%.4x\n", word
, PCI_CB_IO_LIMIT_1
);
297 PRINT (" CardBus IO limit high 1 = 0x%.4x\n", word
, PCI_CB_IO_LIMIT_1_HI
);
298 PRINT (" interrupt line = 0x%.2x\n", byte
, PCI_INTERRUPT_LINE
);
299 PRINT (" interrupt pin = 0x%.2x\n", byte
, PCI_INTERRUPT_PIN
);
300 PRINT (" bridge control = 0x%.4x\n", word
, PCI_CB_BRIDGE_CONTROL
);
301 PRINT (" subvendor ID = 0x%.4x\n", word
, PCI_CB_SUBSYSTEM_VENDOR_ID
);
302 PRINT (" subdevice ID = 0x%.4x\n", word
, PCI_CB_SUBSYSTEM_ID
);
303 PRINT (" PC Card 16bit base address = 0x%.8x\n", dword
, PCI_CB_LEGACY_MODE_BASE
);
307 printf("unknown header\n");
315 /* Convert the "bus.device.function" identifier into a number.
317 static pci_dev_t
get_pci_dev(char* name
)
321 int bdfs
[3] = {0,0,0};
326 for (i
= 0, iold
= 0, n
= 0; i
< len
; i
++) {
327 if (name
[i
] == '.') {
328 memcpy(cnum
, &name
[iold
], i
- iold
);
329 cnum
[i
- iold
] = '\0';
330 bdfs
[n
++] = simple_strtoul(cnum
, NULL
, 16);
334 strcpy(cnum
, &name
[iold
]);
337 bdfs
[n
] = simple_strtoul(cnum
, NULL
, 16);
338 return PCI_BDF(bdfs
[0], bdfs
[1], bdfs
[2]);
341 static int pci_cfg_display(pci_dev_t bdf
, ulong addr
, ulong size
, ulong length
)
343 #define DISP_LINE_LEN 16
344 ulong i
, nbytes
, linebytes
;
348 length
= 0x40 / size
; /* Standard PCI configuration space */
351 * once, and all accesses are with the specified bus width.
353 nbytes
= length
* size
;
359 printf("%08lx:", addr
);
360 linebytes
= (nbytes
>DISP_LINE_LEN
)?DISP_LINE_LEN
:nbytes
;
361 for (i
=0; i
<linebytes
; i
+= size
) {
363 pci_read_config_dword(bdf
, addr
, &val4
);
364 printf(" %08x", val4
);
365 } else if (size
== 2) {
366 pci_read_config_word(bdf
, addr
, &val2
);
367 printf(" %04x", val2
);
369 pci_read_config_byte(bdf
, addr
, &val1
);
370 printf(" %02x", val1
);
380 } while (nbytes
> 0);
385 static int pci_cfg_write (pci_dev_t bdf
, ulong addr
, ulong size
, ulong value
)
388 pci_write_config_dword(bdf
, addr
, value
);
390 else if (size
== 2) {
391 ushort val
= value
& 0xffff;
392 pci_write_config_word(bdf
, addr
, val
);
395 u_char val
= value
& 0xff;
396 pci_write_config_byte(bdf
, addr
, val
);
402 pci_cfg_modify (pci_dev_t bdf
, ulong addr
, ulong size
, ulong value
, int incrflag
)
406 extern char console_buffer
[];
411 /* Print the address, followed by value. Then accept input for
412 * the next value. A non-converted value exits.
415 printf("%08lx:", addr
);
417 pci_read_config_dword(bdf
, addr
, &val4
);
418 printf(" %08x", val4
);
420 else if (size
== 2) {
421 pci_read_config_word(bdf
, addr
, &val2
);
422 printf(" %04x", val2
);
425 pci_read_config_byte(bdf
, addr
, &val1
);
426 printf(" %02x", val1
);
429 nbytes
= readline (" ? ");
430 if (nbytes
== 0 || (nbytes
== 1 && console_buffer
[0] == '-')) {
431 /* <CR> pressed as only input, don't modify current
432 * location and move to next. "-" pressed will go back.
435 addr
+= nbytes
? -size
: size
;
437 #ifdef CONFIG_BOOT_RETRY_TIME
438 reset_cmd_timeout(); /* good enough to not time out */
441 #ifdef CONFIG_BOOT_RETRY_TIME
442 else if (nbytes
== -2) {
443 break; /* timed out, exit the command */
448 i
= simple_strtoul(console_buffer
, &endp
, 16);
449 nbytes
= endp
- console_buffer
;
451 #ifdef CONFIG_BOOT_RETRY_TIME
452 /* good enough to not time out
456 pci_cfg_write (bdf
, addr
, size
, i
);
466 /* PCI Configuration Space access commands
469 * pci display[.b, .w, .l] bus.device.function} [addr] [len]
470 * pci next[.b, .w, .l] bus.device.function [addr]
471 * pci modify[.b, .w, .l] bus.device.function [addr]
472 * pci write[.b, .w, .l] bus.device.function addr value
474 int do_pci (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
476 ulong addr
= 0, value
= 0, size
= 0;
484 case 'd': /* display */
486 case 'm': /* modify */
487 case 'w': /* write */
488 /* Check for a size specification. */
489 size
= cmd_get_data_size(argv
[1], 4);
491 addr
= simple_strtoul(argv
[3], NULL
, 16);
493 value
= simple_strtoul(argv
[4], NULL
, 16);
494 case 'h': /* header */
497 if ((bdf
= get_pci_dev(argv
[2])) == -1)
500 #ifdef CONFIG_CMD_PCI_ENUM
504 default: /* scan bus */
505 value
= 1; /* short listing */
506 bdf
= 0; /* bus number */
508 if (argv
[argc
-1][0] == 'l') {
513 bdf
= simple_strtoul(argv
[1], NULL
, 16);
519 switch (argv
[1][0]) {
520 case 'h': /* header */
521 pci_header_show(bdf
);
523 case 'd': /* display */
524 return pci_cfg_display(bdf
, addr
, size
, value
);
525 #ifdef CONFIG_CMD_PCI_ENUM
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 return cmd_usage(cmdtp
);
549 /***************************************************/
554 "list and access PCI Configuration Space",
556 " - short or long list of PCI devices on bus 'bus'\n"
557 #ifdef CONFIG_CMD_PCI_ENUM
559 " - re-enumerate PCI buses\n"
562 " - show header of PCI device 'bus.device.function'\n"
563 "pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
564 " - display PCI configuration space (CFG)\n"
565 "pci next[.b, .w, .l] b.d.f address\n"
566 " - modify, read and keep CFG address\n"
567 "pci modify[.b, .w, .l] b.d.f address\n"
568 " - modify, auto increment CFG address\n"
569 "pci write[.b, .w, .l] b.d.f address value\n"
570 " - write to CFG address"