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));
95 static struct pci_reg_info regs_start[] = {
96 { "vendor ID", PCI_SIZE_16, PCI_VENDOR_ID },
97 { "device ID", PCI_SIZE_16, PCI_DEVICE_ID },
98 { "command register ID", PCI_SIZE_16, PCI_COMMAND },
99 { "status register", PCI_SIZE_16, PCI_STATUS },
100 { "revision ID", PCI_SIZE_8, PCI_REVISION_ID },
104 static struct pci_reg_info regs_rest[] = {
105 { "sub class code", PCI_SIZE_8, PCI_CLASS_SUB_CODE },
106 { "programming interface", PCI_SIZE_8, PCI_CLASS_PROG },
107 { "cache line", PCI_SIZE_8, PCI_CACHE_LINE_SIZE },
108 { "latency time", PCI_SIZE_8, PCI_LATENCY_TIMER },
109 { "header type", PCI_SIZE_8, PCI_HEADER_TYPE },
110 { "BIST", PCI_SIZE_8, PCI_BIST },
111 { "base address 0", PCI_SIZE_32, PCI_BASE_ADDRESS_0 },
115 static struct pci_reg_info regs_normal[] = {
116 { "base address 1", PCI_SIZE_32, PCI_BASE_ADDRESS_1 },
117 { "base address 2", PCI_SIZE_32, PCI_BASE_ADDRESS_2 },
118 { "base address 3", PCI_SIZE_32, PCI_BASE_ADDRESS_3 },
119 { "base address 4", PCI_SIZE_32, PCI_BASE_ADDRESS_4 },
120 { "base address 5", PCI_SIZE_32, PCI_BASE_ADDRESS_5 },
121 { "cardBus CIS pointer", PCI_SIZE_32, PCI_CARDBUS_CIS },
122 { "sub system vendor ID", PCI_SIZE_16, PCI_SUBSYSTEM_VENDOR_ID },
123 { "sub system ID", PCI_SIZE_16, PCI_SUBSYSTEM_ID },
124 { "expansion ROM base address", PCI_SIZE_32, PCI_ROM_ADDRESS },
125 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE },
126 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN },
127 { "min Grant", PCI_SIZE_8, PCI_MIN_GNT },
128 { "max Latency", PCI_SIZE_8, PCI_MAX_LAT },
132 static struct pci_reg_info regs_bridge[] = {
133 { "base address 1", PCI_SIZE_32, PCI_BASE_ADDRESS_1 },
134 { "primary bus number", PCI_SIZE_8, PCI_PRIMARY_BUS },
135 { "secondary bus number", PCI_SIZE_8, PCI_SECONDARY_BUS },
136 { "subordinate bus number", PCI_SIZE_8, PCI_SUBORDINATE_BUS },
137 { "secondary latency timer", PCI_SIZE_8, PCI_SEC_LATENCY_TIMER },
138 { "IO base", PCI_SIZE_8, PCI_IO_BASE },
139 { "IO limit", PCI_SIZE_8, PCI_IO_LIMIT },
140 { "secondary status", PCI_SIZE_16, PCI_SEC_STATUS },
141 { "memory base", PCI_SIZE_16, PCI_MEMORY_BASE },
142 { "memory limit", PCI_SIZE_16, PCI_MEMORY_LIMIT },
143 { "prefetch memory base", PCI_SIZE_16, PCI_PREF_MEMORY_BASE },
144 { "prefetch memory limit", PCI_SIZE_16, PCI_PREF_MEMORY_LIMIT },
145 { "prefetch memory base upper", PCI_SIZE_32, PCI_PREF_BASE_UPPER32 },
146 { "prefetch memory limit upper", PCI_SIZE_32, PCI_PREF_LIMIT_UPPER32 },
147 { "IO base upper 16 bits", PCI_SIZE_16, PCI_IO_BASE_UPPER16 },
148 { "IO limit upper 16 bits", PCI_SIZE_16, PCI_IO_LIMIT_UPPER16 },
149 { "expansion ROM base address", PCI_SIZE_32, PCI_ROM_ADDRESS1 },
150 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE },
151 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN },
152 { "bridge control", PCI_SIZE_16, PCI_BRIDGE_CONTROL },
156 static struct pci_reg_info regs_cardbus[] = {
157 { "capabilities", PCI_SIZE_8, PCI_CB_CAPABILITY_LIST },
158 { "secondary status", PCI_SIZE_16, PCI_CB_SEC_STATUS },
159 { "primary bus number", PCI_SIZE_8, PCI_CB_PRIMARY_BUS },
160 { "CardBus number", PCI_SIZE_8, PCI_CB_CARD_BUS },
161 { "subordinate bus number", PCI_SIZE_8, PCI_CB_SUBORDINATE_BUS },
162 { "CardBus latency timer", PCI_SIZE_8, PCI_CB_LATENCY_TIMER },
163 { "CardBus memory base 0", PCI_SIZE_32, PCI_CB_MEMORY_BASE_0 },
164 { "CardBus memory limit 0", PCI_SIZE_32, PCI_CB_MEMORY_LIMIT_0 },
165 { "CardBus memory base 1", PCI_SIZE_32, PCI_CB_MEMORY_BASE_1 },
166 { "CardBus memory limit 1", PCI_SIZE_32, PCI_CB_MEMORY_LIMIT_1 },
167 { "CardBus IO base 0", PCI_SIZE_16, PCI_CB_IO_BASE_0 },
168 { "CardBus IO base high 0", PCI_SIZE_16, PCI_CB_IO_BASE_0_HI },
169 { "CardBus IO limit 0", PCI_SIZE_16, PCI_CB_IO_LIMIT_0 },
170 { "CardBus IO limit high 0", PCI_SIZE_16, PCI_CB_IO_LIMIT_0_HI },
171 { "CardBus IO base 1", PCI_SIZE_16, PCI_CB_IO_BASE_1 },
172 { "CardBus IO base high 1", PCI_SIZE_16, PCI_CB_IO_BASE_1_HI },
173 { "CardBus IO limit 1", PCI_SIZE_16, PCI_CB_IO_LIMIT_1 },
174 { "CardBus IO limit high 1", PCI_SIZE_16, PCI_CB_IO_LIMIT_1_HI },
175 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE },
176 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN },
177 { "bridge control", PCI_SIZE_16, PCI_CB_BRIDGE_CONTROL },
178 { "subvendor ID", PCI_SIZE_16, PCI_CB_SUBSYSTEM_VENDOR_ID },
179 { "subdevice ID", PCI_SIZE_16, PCI_CB_SUBSYSTEM_ID },
180 { "PC Card 16bit base address", PCI_SIZE_32, PCI_CB_LEGACY_MODE_BASE },
185 * pci_header_show() - Show the header of the specified PCI device.
187 * @dev: Bus+Device+Function number
190 void pci_header_show(struct udevice *dev)
192 void pci_header_show(pci_dev_t dev)
196 unsigned long class, header_type;
198 dm_pci_read_config(dev, PCI_CLASS_CODE, &class, PCI_SIZE_8);
199 dm_pci_read_config(dev, PCI_HEADER_TYPE, &header_type, PCI_SIZE_8);
201 u8 class, header_type;
203 pci_read_config_byte(dev, PCI_CLASS_CODE, &class);
204 pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
206 pci_show_regs(dev, regs_start);
207 printf(" class code = 0x%.2x (%s)\n", (int)class,
208 pci_class_str(class));
209 pci_show_regs(dev, regs_rest);
211 switch (header_type & 0x03) {
212 case PCI_HEADER_TYPE_NORMAL: /* "normal" PCI device */
213 pci_show_regs(dev, regs_normal);
215 case PCI_HEADER_TYPE_BRIDGE: /* PCI-to-PCI bridge */
216 pci_show_regs(dev, regs_bridge);
218 case PCI_HEADER_TYPE_CARDBUS: /* PCI-to-CardBus bridge */
219 pci_show_regs(dev, regs_cardbus);
223 printf("unknown header\n");
228 void pciinfo_header(int busnum, bool short_listing)
230 printf("Scanning PCI devices on bus %d\n", busnum);
233 printf("BusDevFun VendorId DeviceId Device Class Sub-Class\n");
234 printf("_____________________________________________________________\n");
240 * pci_header_show_brief() - Show the short-form PCI device header
242 * Reads and prints the header of the specified PCI device in short form.
244 * @dev: PCI device to show
246 static void pci_header_show_brief(struct udevice *dev)
248 ulong vendor, device;
249 ulong class, subclass;
251 dm_pci_read_config(dev, PCI_VENDOR_ID, &vendor, PCI_SIZE_16);
252 dm_pci_read_config(dev, PCI_DEVICE_ID, &device, PCI_SIZE_16);
253 dm_pci_read_config(dev, PCI_CLASS_CODE, &class, PCI_SIZE_8);
254 dm_pci_read_config(dev, PCI_CLASS_SUB_CODE, &subclass, PCI_SIZE_8);
256 printf("0x%.4lx 0x%.4lx %-23s 0x%.2lx\n",
258 pci_class_str(class), subclass);
261 static void pciinfo(struct udevice *bus, bool short_listing)
265 pciinfo_header(bus->seq, short_listing);
267 for (device_find_first_child(bus, &dev);
269 device_find_next_child(&dev)) {
270 struct pci_child_platdata *pplat;
272 pplat = dev_get_parent_platdata(dev);
274 printf("%02x.%02x.%02x ", bus->seq,
275 PCI_DEV(pplat->devfn), PCI_FUNC(pplat->devfn));
276 pci_header_show_brief(dev);
278 printf("\nFound PCI device %02x.%02x.%02x:\n", bus->seq,
279 PCI_DEV(pplat->devfn), PCI_FUNC(pplat->devfn));
280 pci_header_show(dev);
288 * pci_header_show_brief() - Show the short-form PCI device header
290 * Reads and prints the header of the specified PCI device in short form.
292 * @dev: Bus+Device+Function number
294 void pci_header_show_brief(pci_dev_t dev)
299 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
300 pci_read_config_word(dev, PCI_DEVICE_ID, &device);
301 pci_read_config_byte(dev, PCI_CLASS_CODE, &class);
302 pci_read_config_byte(dev, PCI_CLASS_SUB_CODE, &subclass);
304 printf("0x%.4x 0x%.4x %-23s 0x%.2x\n",
306 pci_class_str(class), subclass);
310 * pciinfo() - Show a list of devices on the PCI bus
312 * Show information about devices on PCI bus. Depending on @short_pci_listing
313 * the output will be more or less exhaustive.
315 * @bus_num: The number of the bus to be scanned
316 * @short_pci_listing: true to use short form, showing only a brief header
319 void pciinfo(int bus_num, int short_pci_listing)
321 struct pci_controller *hose = pci_bus_to_hose(bus_num);
324 unsigned char header_type;
325 unsigned short vendor_id;
332 pciinfo_header(bus_num, short_pci_listing);
334 for (device = 0; device < PCI_MAX_PCI_DEVICES; device++) {
337 for (function = 0; function < PCI_MAX_PCI_FUNCTIONS;
340 * If this is not a multi-function device, we skip
343 if (function && !(header_type & 0x80))
346 dev = PCI_BDF(bus_num, device, function);
348 if (pci_skip_dev(hose, dev))
351 ret = pci_read_config_word(dev, PCI_VENDOR_ID,
355 if ((vendor_id == 0xFFFF) || (vendor_id == 0x0000))
359 pci_read_config_byte(dev, PCI_HEADER_TYPE,
363 if (short_pci_listing) {
364 printf("%02x.%02x.%02x ", bus_num, device,
366 pci_header_show_brief(dev);
368 printf("\nFound PCI device %02x.%02x.%02x:\n",
369 bus_num, device, function);
370 pci_header_show(dev);
377 printf("Cannot read bus configuration: %d\n", ret);
382 * get_pci_dev() - Convert the "bus.device.function" identifier into a number
384 * @name: Device string in the form "bus.device.function" where each is in hex
385 * @return encoded pci_dev_t or -1 if the string was invalid
387 static pci_dev_t get_pci_dev(char *name)
391 int bdfs[3] = {0,0,0};
396 for (i = 0, iold = 0, n = 0; i < len; i++) {
397 if (name[i] == '.') {
398 memcpy(cnum, &name[iold], i - iold);
399 cnum[i - iold] = '\0';
400 bdfs[n++] = simple_strtoul(cnum, NULL, 16);
404 strcpy(cnum, &name[iold]);
407 bdfs[n] = simple_strtoul(cnum, NULL, 16);
409 return PCI_BDF(bdfs[0], bdfs[1], bdfs[2]);
413 static int pci_cfg_display(struct udevice *dev, ulong addr,
414 enum pci_size_t size, ulong length)
416 static int pci_cfg_display(pci_dev_t bdf, ulong addr, enum pci_size_t size,
420 #define DISP_LINE_LEN 16
421 ulong i, nbytes, linebytes;
425 byte_size = pci_byte_size(size);
427 length = 0x40 / byte_size; /* Standard PCI config space */
430 * once, and all accesses are with the specified bus width.
432 nbytes = length * byte_size;
434 printf("%08lx:", addr);
435 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
436 for (i = 0; i < linebytes; i += byte_size) {
440 dm_pci_read_config(dev, addr, &val, size);
442 val = pci_read_config(bdf, addr, size);
444 printf(" %0*lx", pci_field_width(size), val);
453 } while (nbytes > 0);
458 #ifndef CONFIG_DM_PCI
459 static int pci_cfg_write (pci_dev_t bdf, ulong addr, ulong size, ulong value)
462 pci_write_config_dword(bdf, addr, value);
464 else if (size == 2) {
465 ushort val = value & 0xffff;
466 pci_write_config_word(bdf, addr, val);
469 u_char val = value & 0xff;
470 pci_write_config_byte(bdf, addr, val);
477 static int pci_cfg_modify(struct udevice *dev, ulong addr, ulong size,
478 ulong value, int incrflag)
480 static int pci_cfg_modify(pci_dev_t bdf, ulong addr, ulong size, ulong value,
488 /* Print the address, followed by value. Then accept input for
489 * the next value. A non-converted value exits.
492 printf("%08lx:", addr);
494 dm_pci_read_config(dev, addr, &val, size);
496 val = pci_read_config(bdf, addr, size);
498 printf(" %0*lx", pci_field_width(size), val);
500 nbytes = cli_readline(" ? ");
501 if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
502 /* <CR> pressed as only input, don't modify current
503 * location and move to next. "-" pressed will go back.
506 addr += nbytes ? -size : size;
508 /* good enough to not time out */
509 bootretry_reset_cmd_timeout();
511 #ifdef CONFIG_BOOT_RETRY_TIME
512 else if (nbytes == -2) {
513 break; /* timed out, exit the command */
518 i = simple_strtoul(console_buffer, &endp, 16);
519 nbytes = endp - console_buffer;
521 /* good enough to not time out
523 bootretry_reset_cmd_timeout();
525 dm_pci_write_config(dev, addr, i, size);
527 pci_cfg_write(bdf, addr, size, i);
538 /* PCI Configuration Space access commands
541 * pci display[.b, .w, .l] bus.device.function} [addr] [len]
542 * pci next[.b, .w, .l] bus.device.function [addr]
543 * pci modify[.b, .w, .l] bus.device.function [addr]
544 * pci write[.b, .w, .l] bus.device.function addr value
546 static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
548 ulong addr = 0, value = 0, cmd_size = 0;
549 enum pci_size_t size = PCI_SIZE_32;
551 struct udevice *dev, *bus;
564 case 'd': /* display */
566 case 'm': /* modify */
567 case 'w': /* write */
568 /* Check for a size specification. */
569 cmd_size = cmd_get_data_size(argv[1], 4);
570 size = (cmd_size == 4) ? PCI_SIZE_32 : cmd_size - 1;
572 addr = simple_strtoul(argv[3], NULL, 16);
574 value = simple_strtoul(argv[4], NULL, 16);
575 case 'h': /* header */
578 if ((bdf = get_pci_dev(argv[2])) == -1)
581 #if defined(CONFIG_CMD_PCI_ENUM) || defined(CONFIG_DM_PCI)
586 default: /* scan bus */
587 value = 1; /* short listing */
589 if (argv[argc-1][0] == 'l') {
594 busnum = simple_strtoul(argv[1], NULL, 16);
597 ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, &bus);
599 printf("No such bus\n");
600 return CMD_RET_FAILURE;
604 pciinfo(busnum, value);
610 ret = dm_pci_bus_find_bdf(bdf, &dev);
612 printf("No such device\n");
613 return CMD_RET_FAILURE;
619 switch (argv[1][0]) {
620 case 'h': /* header */
621 pci_header_show(dev);
623 case 'd': /* display */
624 return pci_cfg_display(dev, addr, size, value);
628 ret = pci_cfg_modify(dev, addr, size, value, 0);
630 case 'm': /* modify */
633 ret = pci_cfg_modify(dev, addr, size, value, 1);
635 case 'w': /* write */
639 ret = dm_pci_write_config(dev, addr, value, size);
641 ret = pci_cfg_write(dev, addr, size, value);
651 return CMD_RET_USAGE;
654 /***************************************************/
656 #ifdef CONFIG_SYS_LONGHELP
657 static char pci_help_text[] =
659 " - short or long list of PCI devices on bus 'bus'\n"
660 #if defined(CONFIG_CMD_PCI_ENUM) || defined(CONFIG_DM_PCI)
662 " - Enumerate PCI buses\n"
665 " - show header of PCI device 'bus.device.function'\n"
666 "pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
667 " - display PCI configuration space (CFG)\n"
668 "pci next[.b, .w, .l] b.d.f address\n"
669 " - modify, read and keep CFG address\n"
670 "pci modify[.b, .w, .l] b.d.f address\n"
671 " - modify, auto increment CFG address\n"
672 "pci write[.b, .w, .l] b.d.f address value\n"
673 " - write to CFG address";
678 "list and access PCI Configuration Space", pci_help_text