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 * SPDX-License-Identifier: GPL-2.0+
17 #include <bootretry.h>
22 #include <asm/processor.h>
32 static int pci_byte_size(enum pci_size_t size)
45 static int pci_field_width(enum pci_size_t size)
47 return pci_byte_size(size) * 2;
51 static void pci_show_regs(struct udevice *dev, struct pci_reg_info *regs)
53 for (; regs->name; regs++) {
56 dm_pci_read_config(dev, regs->offset, &val, regs->size);
57 printf(" %s =%*s%#.*lx\n", regs->name,
58 (int)(28 - strlen(regs->name)), "",
59 pci_field_width(regs->size), val);
63 static unsigned long pci_read_config(pci_dev_t dev, int offset,
72 pci_read_config_byte(dev, offset, &val8);
75 pci_read_config_word(dev, offset, &val16);
79 pci_read_config_dword(dev, offset, &val32);
84 static void pci_show_regs(pci_dev_t dev, struct pci_reg_info *regs)
86 for (; regs->name; regs++) {
87 printf(" %s =%*s%#.*lx\n", regs->name,
88 (int)(28 - strlen(regs->name)), "",
89 pci_field_width(regs->size),
90 pci_read_config(dev, regs->offset, regs->size));
96 int pci_bar_show(struct udevice *dev)
99 int bar_cnt, bar_id, mem_type;
101 u32 base_low, base_high;
102 u32 size_low, size_high;
107 dm_pci_read_config8(dev, PCI_HEADER_TYPE, &header_type);
109 if (header_type == PCI_HEADER_TYPE_CARDBUS) {
110 printf("CardBus doesn't support BARs\n");
114 bar_cnt = (header_type == PCI_HEADER_TYPE_NORMAL) ? 6 : 2;
116 printf("ID Base Size Width Type\n");
117 printf("----------------------------------------------------------\n");
120 reg_addr = PCI_BASE_ADDRESS_0;
122 dm_pci_read_config32(dev, reg_addr, &base_low);
123 dm_pci_write_config32(dev, reg_addr, 0xffffffff);
124 dm_pci_read_config32(dev, reg_addr, &size_low);
125 dm_pci_write_config32(dev, reg_addr, base_low);
128 base = base_low & ~0xf;
129 size = size_low & ~0xf;
131 size_high = 0xffffffff;
133 prefetchable = base_low & PCI_BASE_ADDRESS_MEM_PREFETCH;
134 is_io = base_low & PCI_BASE_ADDRESS_SPACE_IO;
135 mem_type = base_low & PCI_BASE_ADDRESS_MEM_TYPE_MASK;
137 if (mem_type == PCI_BASE_ADDRESS_MEM_TYPE_64) {
138 dm_pci_read_config32(dev, reg_addr, &base_high);
139 dm_pci_write_config32(dev, reg_addr, 0xffffffff);
140 dm_pci_read_config32(dev, reg_addr, &size_high);
141 dm_pci_write_config32(dev, reg_addr, base_high);
147 base = base | ((u64)base_high << 32);
148 size = size | ((u64)size_high << 32);
150 if ((!is_64 && size_low) || (is_64 && size)) {
152 printf(" %d %#016llx %#016llx %d %s %s\n",
153 bar_id, base, size, is_64 ? 64 : 32,
154 is_io ? "I/O" : "MEM",
155 prefetchable ? "Prefetchable" : "");
166 static struct pci_reg_info regs_start[] = {
167 { "vendor ID", PCI_SIZE_16, PCI_VENDOR_ID },
168 { "device ID", PCI_SIZE_16, PCI_DEVICE_ID },
169 { "command register ID", PCI_SIZE_16, PCI_COMMAND },
170 { "status register", PCI_SIZE_16, PCI_STATUS },
171 { "revision ID", PCI_SIZE_8, PCI_REVISION_ID },
175 static struct pci_reg_info regs_rest[] = {
176 { "sub class code", PCI_SIZE_8, PCI_CLASS_SUB_CODE },
177 { "programming interface", PCI_SIZE_8, PCI_CLASS_PROG },
178 { "cache line", PCI_SIZE_8, PCI_CACHE_LINE_SIZE },
179 { "latency time", PCI_SIZE_8, PCI_LATENCY_TIMER },
180 { "header type", PCI_SIZE_8, PCI_HEADER_TYPE },
181 { "BIST", PCI_SIZE_8, PCI_BIST },
182 { "base address 0", PCI_SIZE_32, PCI_BASE_ADDRESS_0 },
186 static struct pci_reg_info regs_normal[] = {
187 { "base address 1", PCI_SIZE_32, PCI_BASE_ADDRESS_1 },
188 { "base address 2", PCI_SIZE_32, PCI_BASE_ADDRESS_2 },
189 { "base address 3", PCI_SIZE_32, PCI_BASE_ADDRESS_3 },
190 { "base address 4", PCI_SIZE_32, PCI_BASE_ADDRESS_4 },
191 { "base address 5", PCI_SIZE_32, PCI_BASE_ADDRESS_5 },
192 { "cardBus CIS pointer", PCI_SIZE_32, PCI_CARDBUS_CIS },
193 { "sub system vendor ID", PCI_SIZE_16, PCI_SUBSYSTEM_VENDOR_ID },
194 { "sub system ID", PCI_SIZE_16, PCI_SUBSYSTEM_ID },
195 { "expansion ROM base address", PCI_SIZE_32, PCI_ROM_ADDRESS },
196 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE },
197 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN },
198 { "min Grant", PCI_SIZE_8, PCI_MIN_GNT },
199 { "max Latency", PCI_SIZE_8, PCI_MAX_LAT },
203 static struct pci_reg_info regs_bridge[] = {
204 { "base address 1", PCI_SIZE_32, PCI_BASE_ADDRESS_1 },
205 { "primary bus number", PCI_SIZE_8, PCI_PRIMARY_BUS },
206 { "secondary bus number", PCI_SIZE_8, PCI_SECONDARY_BUS },
207 { "subordinate bus number", PCI_SIZE_8, PCI_SUBORDINATE_BUS },
208 { "secondary latency timer", PCI_SIZE_8, PCI_SEC_LATENCY_TIMER },
209 { "IO base", PCI_SIZE_8, PCI_IO_BASE },
210 { "IO limit", PCI_SIZE_8, PCI_IO_LIMIT },
211 { "secondary status", PCI_SIZE_16, PCI_SEC_STATUS },
212 { "memory base", PCI_SIZE_16, PCI_MEMORY_BASE },
213 { "memory limit", PCI_SIZE_16, PCI_MEMORY_LIMIT },
214 { "prefetch memory base", PCI_SIZE_16, PCI_PREF_MEMORY_BASE },
215 { "prefetch memory limit", PCI_SIZE_16, PCI_PREF_MEMORY_LIMIT },
216 { "prefetch memory base upper", PCI_SIZE_32, PCI_PREF_BASE_UPPER32 },
217 { "prefetch memory limit upper", PCI_SIZE_32, PCI_PREF_LIMIT_UPPER32 },
218 { "IO base upper 16 bits", PCI_SIZE_16, PCI_IO_BASE_UPPER16 },
219 { "IO limit upper 16 bits", PCI_SIZE_16, PCI_IO_LIMIT_UPPER16 },
220 { "expansion ROM base address", PCI_SIZE_32, PCI_ROM_ADDRESS1 },
221 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE },
222 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN },
223 { "bridge control", PCI_SIZE_16, PCI_BRIDGE_CONTROL },
227 static struct pci_reg_info regs_cardbus[] = {
228 { "capabilities", PCI_SIZE_8, PCI_CB_CAPABILITY_LIST },
229 { "secondary status", PCI_SIZE_16, PCI_CB_SEC_STATUS },
230 { "primary bus number", PCI_SIZE_8, PCI_CB_PRIMARY_BUS },
231 { "CardBus number", PCI_SIZE_8, PCI_CB_CARD_BUS },
232 { "subordinate bus number", PCI_SIZE_8, PCI_CB_SUBORDINATE_BUS },
233 { "CardBus latency timer", PCI_SIZE_8, PCI_CB_LATENCY_TIMER },
234 { "CardBus memory base 0", PCI_SIZE_32, PCI_CB_MEMORY_BASE_0 },
235 { "CardBus memory limit 0", PCI_SIZE_32, PCI_CB_MEMORY_LIMIT_0 },
236 { "CardBus memory base 1", PCI_SIZE_32, PCI_CB_MEMORY_BASE_1 },
237 { "CardBus memory limit 1", PCI_SIZE_32, PCI_CB_MEMORY_LIMIT_1 },
238 { "CardBus IO base 0", PCI_SIZE_16, PCI_CB_IO_BASE_0 },
239 { "CardBus IO base high 0", PCI_SIZE_16, PCI_CB_IO_BASE_0_HI },
240 { "CardBus IO limit 0", PCI_SIZE_16, PCI_CB_IO_LIMIT_0 },
241 { "CardBus IO limit high 0", PCI_SIZE_16, PCI_CB_IO_LIMIT_0_HI },
242 { "CardBus IO base 1", PCI_SIZE_16, PCI_CB_IO_BASE_1 },
243 { "CardBus IO base high 1", PCI_SIZE_16, PCI_CB_IO_BASE_1_HI },
244 { "CardBus IO limit 1", PCI_SIZE_16, PCI_CB_IO_LIMIT_1 },
245 { "CardBus IO limit high 1", PCI_SIZE_16, PCI_CB_IO_LIMIT_1_HI },
246 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE },
247 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN },
248 { "bridge control", PCI_SIZE_16, PCI_CB_BRIDGE_CONTROL },
249 { "subvendor ID", PCI_SIZE_16, PCI_CB_SUBSYSTEM_VENDOR_ID },
250 { "subdevice ID", PCI_SIZE_16, PCI_CB_SUBSYSTEM_ID },
251 { "PC Card 16bit base address", PCI_SIZE_32, PCI_CB_LEGACY_MODE_BASE },
256 * pci_header_show() - Show the header of the specified PCI device.
258 * @dev: Bus+Device+Function number
261 void pci_header_show(struct udevice *dev)
263 void pci_header_show(pci_dev_t dev)
267 unsigned long class, header_type;
269 dm_pci_read_config(dev, PCI_CLASS_CODE, &class, PCI_SIZE_8);
270 dm_pci_read_config(dev, PCI_HEADER_TYPE, &header_type, PCI_SIZE_8);
272 u8 class, header_type;
274 pci_read_config_byte(dev, PCI_CLASS_CODE, &class);
275 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
277 pci_show_regs(dev, regs_start);
278 printf(" class code = 0x%.2x (%s)\n", (int)class,
279 pci_class_str(class));
280 pci_show_regs(dev, regs_rest);
282 switch (header_type & 0x03) {
283 case PCI_HEADER_TYPE_NORMAL: /* "normal" PCI device */
284 pci_show_regs(dev, regs_normal);
286 case PCI_HEADER_TYPE_BRIDGE: /* PCI-to-PCI bridge */
287 pci_show_regs(dev, regs_bridge);
289 case PCI_HEADER_TYPE_CARDBUS: /* PCI-to-CardBus bridge */
290 pci_show_regs(dev, regs_cardbus);
294 printf("unknown header\n");
299 void pciinfo_header(int busnum, bool short_listing)
301 printf("Scanning PCI devices on bus %d\n", busnum);
304 printf("BusDevFun VendorId DeviceId Device Class Sub-Class\n");
305 printf("_____________________________________________________________\n");
311 * pci_header_show_brief() - Show the short-form PCI device header
313 * Reads and prints the header of the specified PCI device in short form.
315 * @dev: PCI device to show
317 static void pci_header_show_brief(struct udevice *dev)
319 ulong vendor, device;
320 ulong class, subclass;
322 dm_pci_read_config(dev, PCI_VENDOR_ID, &vendor, PCI_SIZE_16);
323 dm_pci_read_config(dev, PCI_DEVICE_ID, &device, PCI_SIZE_16);
324 dm_pci_read_config(dev, PCI_CLASS_CODE, &class, PCI_SIZE_8);
325 dm_pci_read_config(dev, PCI_CLASS_SUB_CODE, &subclass, PCI_SIZE_8);
327 printf("0x%.4lx 0x%.4lx %-23s 0x%.2lx\n",
329 pci_class_str(class), subclass);
332 static void pciinfo(struct udevice *bus, bool short_listing)
336 pciinfo_header(bus->seq, short_listing);
338 for (device_find_first_child(bus, &dev);
340 device_find_next_child(&dev)) {
341 struct pci_child_platdata *pplat;
343 pplat = dev_get_parent_platdata(dev);
345 printf("%02x.%02x.%02x ", bus->seq,
346 PCI_DEV(pplat->devfn), PCI_FUNC(pplat->devfn));
347 pci_header_show_brief(dev);
349 printf("\nFound PCI device %02x.%02x.%02x:\n", bus->seq,
350 PCI_DEV(pplat->devfn), PCI_FUNC(pplat->devfn));
351 pci_header_show(dev);
359 * pci_header_show_brief() - Show the short-form PCI device header
361 * Reads and prints the header of the specified PCI device in short form.
363 * @dev: Bus+Device+Function number
365 void pci_header_show_brief(pci_dev_t dev)
370 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
371 pci_read_config_word(dev, PCI_DEVICE_ID, &device);
372 pci_read_config_byte(dev, PCI_CLASS_CODE, &class);
373 pci_read_config_byte(dev, PCI_CLASS_SUB_CODE, &subclass);
375 printf("0x%.4x 0x%.4x %-23s 0x%.2x\n",
377 pci_class_str(class), subclass);
381 * pciinfo() - Show a list of devices on the PCI bus
383 * Show information about devices on PCI bus. Depending on @short_pci_listing
384 * the output will be more or less exhaustive.
386 * @bus_num: The number of the bus to be scanned
387 * @short_pci_listing: true to use short form, showing only a brief header
390 void pciinfo(int bus_num, int short_pci_listing)
392 struct pci_controller *hose = pci_bus_to_hose(bus_num);
395 unsigned char header_type;
396 unsigned short vendor_id;
403 pciinfo_header(bus_num, short_pci_listing);
405 for (device = 0; device < PCI_MAX_PCI_DEVICES; device++) {
408 for (function = 0; function < PCI_MAX_PCI_FUNCTIONS;
411 * If this is not a multi-function device, we skip
414 if (function && !(header_type & 0x80))
417 dev = PCI_BDF(bus_num, device, function);
419 if (pci_skip_dev(hose, dev))
422 ret = pci_read_config_word(dev, PCI_VENDOR_ID,
426 if ((vendor_id == 0xFFFF) || (vendor_id == 0x0000))
430 pci_read_config_byte(dev, PCI_HEADER_TYPE,
434 if (short_pci_listing) {
435 printf("%02x.%02x.%02x ", bus_num, device,
437 pci_header_show_brief(dev);
439 printf("\nFound PCI device %02x.%02x.%02x:\n",
440 bus_num, device, function);
441 pci_header_show(dev);
448 printf("Cannot read bus configuration: %d\n", ret);
453 * get_pci_dev() - Convert the "bus.device.function" identifier into a number
455 * @name: Device string in the form "bus.device.function" where each is in hex
456 * @return encoded pci_dev_t or -1 if the string was invalid
458 static pci_dev_t get_pci_dev(char *name)
462 int bdfs[3] = {0,0,0};
467 for (i = 0, iold = 0, n = 0; i < len; i++) {
468 if (name[i] == '.') {
469 memcpy(cnum, &name[iold], i - iold);
470 cnum[i - iold] = '\0';
471 bdfs[n++] = simple_strtoul(cnum, NULL, 16);
475 strcpy(cnum, &name[iold]);
478 bdfs[n] = simple_strtoul(cnum, NULL, 16);
480 return PCI_BDF(bdfs[0], bdfs[1], bdfs[2]);
484 static int pci_cfg_display(struct udevice *dev, ulong addr,
485 enum pci_size_t size, ulong length)
487 static int pci_cfg_display(pci_dev_t bdf, ulong addr, enum pci_size_t size,
491 #define DISP_LINE_LEN 16
492 ulong i, nbytes, linebytes;
496 byte_size = pci_byte_size(size);
498 length = 0x40 / byte_size; /* Standard PCI config space */
501 * once, and all accesses are with the specified bus width.
503 nbytes = length * byte_size;
505 printf("%08lx:", addr);
506 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
507 for (i = 0; i < linebytes; i += byte_size) {
511 dm_pci_read_config(dev, addr, &val, size);
513 val = pci_read_config(bdf, addr, size);
515 printf(" %0*lx", pci_field_width(size), val);
524 } while (nbytes > 0);
529 #ifndef CONFIG_DM_PCI
530 static int pci_cfg_write (pci_dev_t bdf, ulong addr, ulong size, ulong value)
533 pci_write_config_dword(bdf, addr, value);
535 else if (size == 2) {
536 ushort val = value & 0xffff;
537 pci_write_config_word(bdf, addr, val);
540 u_char val = value & 0xff;
541 pci_write_config_byte(bdf, addr, val);
548 static int pci_cfg_modify(struct udevice *dev, ulong addr, ulong size,
549 ulong value, int incrflag)
551 static int pci_cfg_modify(pci_dev_t bdf, ulong addr, ulong size, ulong value,
559 /* Print the address, followed by value. Then accept input for
560 * the next value. A non-converted value exits.
563 printf("%08lx:", addr);
565 dm_pci_read_config(dev, addr, &val, size);
567 val = pci_read_config(bdf, addr, size);
569 printf(" %0*lx", pci_field_width(size), val);
571 nbytes = cli_readline(" ? ");
572 if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
573 /* <CR> pressed as only input, don't modify current
574 * location and move to next. "-" pressed will go back.
577 addr += nbytes ? -size : size;
579 /* good enough to not time out */
580 bootretry_reset_cmd_timeout();
582 #ifdef CONFIG_BOOT_RETRY_TIME
583 else if (nbytes == -2) {
584 break; /* timed out, exit the command */
589 i = simple_strtoul(console_buffer, &endp, 16);
590 nbytes = endp - console_buffer;
592 /* good enough to not time out
594 bootretry_reset_cmd_timeout();
596 dm_pci_write_config(dev, addr, i, size);
598 pci_cfg_write(bdf, addr, size, i);
609 /* PCI Configuration Space access commands
612 * pci display[.b, .w, .l] bus.device.function} [addr] [len]
613 * pci next[.b, .w, .l] bus.device.function [addr]
614 * pci modify[.b, .w, .l] bus.device.function [addr]
615 * pci write[.b, .w, .l] bus.device.function addr value
617 static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
619 ulong addr = 0, value = 0, cmd_size = 0;
620 enum pci_size_t size = PCI_SIZE_32;
622 struct udevice *dev, *bus;
635 case 'd': /* display */
637 case 'm': /* modify */
638 case 'w': /* write */
639 /* Check for a size specification. */
640 cmd_size = cmd_get_data_size(argv[1], 4);
641 size = (cmd_size == 4) ? PCI_SIZE_32 : cmd_size - 1;
643 addr = simple_strtoul(argv[3], NULL, 16);
645 value = simple_strtoul(argv[4], NULL, 16);
646 case 'h': /* header */
652 if ((bdf = get_pci_dev(argv[2])) == -1)
655 #if defined(CONFIG_CMD_PCI_ENUM) || defined(CONFIG_DM_PCI)
660 default: /* scan bus */
661 value = 1; /* short listing */
663 if (argv[argc-1][0] == 'l') {
668 busnum = simple_strtoul(argv[1], NULL, 16);
671 ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, &bus);
673 printf("No such bus\n");
674 return CMD_RET_FAILURE;
678 pciinfo(busnum, value);
684 ret = dm_pci_bus_find_bdf(bdf, &dev);
686 printf("No such device\n");
687 return CMD_RET_FAILURE;
693 switch (argv[1][0]) {
694 case 'h': /* header */
695 pci_header_show(dev);
697 case 'd': /* display */
698 return pci_cfg_display(dev, addr, size, value);
702 ret = pci_cfg_modify(dev, addr, size, value, 0);
704 case 'm': /* modify */
707 ret = pci_cfg_modify(dev, addr, size, value, 1);
709 case 'w': /* write */
713 ret = dm_pci_write_config(dev, addr, value, size);
715 ret = pci_cfg_write(dev, addr, size, value);
721 return pci_bar_show(dev);
730 return CMD_RET_USAGE;
733 /***************************************************/
735 #ifdef CONFIG_SYS_LONGHELP
736 static char pci_help_text[] =
738 " - short or long list of PCI devices on bus 'bus'\n"
739 #if defined(CONFIG_CMD_PCI_ENUM) || defined(CONFIG_DM_PCI)
741 " - Enumerate PCI buses\n"
744 " - show header of PCI device 'bus.device.function'\n"
747 " - show BARs base and size for device b.d.f'\n"
749 "pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
750 " - display PCI configuration space (CFG)\n"
751 "pci next[.b, .w, .l] b.d.f address\n"
752 " - modify, read and keep CFG address\n"
753 "pci modify[.b, .w, .l] b.d.f address\n"
754 " - modify, auto increment CFG address\n"
755 "pci write[.b, .w, .l] b.d.f address value\n"
756 " - write to CFG address";
761 "list and access PCI Configuration Space", pci_help_text