2 * Copyright (c) 2014 Google, Inc
4 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
5 * Andreas Heppel <aheppel@sysgo.de>
7 * (C) Copyright 2002, 2003
8 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
10 * SPDX-License-Identifier: GPL-2.0+
19 const char *pci_class_str(u8 class)
22 case PCI_CLASS_NOT_DEFINED:
23 return "Build before PCI Rev2.0";
25 case PCI_BASE_CLASS_STORAGE:
26 return "Mass storage controller";
28 case PCI_BASE_CLASS_NETWORK:
29 return "Network controller";
31 case PCI_BASE_CLASS_DISPLAY:
32 return "Display controller";
34 case PCI_BASE_CLASS_MULTIMEDIA:
35 return "Multimedia device";
37 case PCI_BASE_CLASS_MEMORY:
38 return "Memory controller";
40 case PCI_BASE_CLASS_BRIDGE:
41 return "Bridge device";
43 case PCI_BASE_CLASS_COMMUNICATION:
44 return "Simple comm. controller";
46 case PCI_BASE_CLASS_SYSTEM:
47 return "Base system peripheral";
49 case PCI_BASE_CLASS_INPUT:
50 return "Input device";
52 case PCI_BASE_CLASS_DOCKING:
53 return "Docking station";
55 case PCI_BASE_CLASS_PROCESSOR:
58 case PCI_BASE_CLASS_SERIAL:
59 return "Serial bus controller";
61 case PCI_BASE_CLASS_INTELLIGENT:
62 return "Intelligent controller";
64 case PCI_BASE_CLASS_SATELLITE:
65 return "Satellite controller";
67 case PCI_BASE_CLASS_CRYPT:
68 return "Cryptographic device";
70 case PCI_BASE_CLASS_SIGNAL_PROCESSING:
73 case PCI_CLASS_OTHERS:
74 return "Does not fit any class";
82 pci_dev_t pci_find_class(uint find_class, int index)
89 for (bus = 0; bus <= pci_last_busno(); bus++) {
90 for (devnum = 0; devnum < PCI_MAX_PCI_DEVICES - 1; devnum++) {
91 pci_read_config_dword(PCI_BDF(bus, devnum, 0),
92 PCI_CLASS_REVISION, &class);
93 if (class >> 16 == 0xffff)
96 for (bdf = PCI_BDF(bus, devnum, 0);
97 bdf <= PCI_BDF(bus, devnum,
98 PCI_MAX_PCI_FUNCTIONS - 1);
99 bdf += PCI_BDF(0, 0, 1)) {
100 pci_read_config_dword(bdf, PCI_CLASS_REVISION,
104 if (class != find_class)
107 * Decrement the index. We want to return the
108 * correct device, so index is 0 for the first
109 * matching device, 1 for the second, etc.
115 /* Return index'th controller. */
124 __weak int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev)
127 * Check if pci device should be skipped in configuration
129 if (dev == PCI_BDF(hose->first_busno, 0, 0)) {
130 #if defined(CONFIG_PCI_CONFIG_HOST_BRIDGE) /* don't skip host bridge */
132 * Only skip configuration if "pciconfighost" is not set
134 if (getenv("pciconfighost") == NULL)
144 /* Get a virtual address associated with a BAR region */
145 void *pci_map_bar(pci_dev_t pdev, int bar, int flags)
147 pci_addr_t pci_bus_addr;
150 /* read BAR address */
151 pci_read_config_dword(pdev, bar, &bar_response);
152 pci_bus_addr = (pci_addr_t)(bar_response & ~0xf);
155 * Pass "0" as the length argument to pci_bus_to_virt. The arg
156 * isn't actualy used on any platform because u-boot assumes a static
157 * linear mapping. In the future, this could read the BAR size
158 * and pass that as the size if needed.
160 return pci_bus_to_virt(pdev, pci_bus_addr, flags, 0, MAP_NOCACHE);
163 void pci_write_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum,
168 bar = PCI_BASE_ADDRESS_0 + barnum * 4;
169 pci_hose_write_config_dword(hose, dev, bar, addr_and_ctrl);
172 u32 pci_read_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum)
177 bar = PCI_BASE_ADDRESS_0 + barnum * 4;
178 pci_hose_read_config_dword(hose, dev, bar, &addr);
179 if (addr & PCI_BASE_ADDRESS_SPACE_IO)
180 return addr & PCI_BASE_ADDRESS_IO_MASK;
182 return addr & PCI_BASE_ADDRESS_MEM_MASK;
185 int __pci_hose_bus_to_phys(struct pci_controller *hose,
188 unsigned long skip_mask,
191 struct pci_region *res;
194 for (i = 0; i < hose->region_count; i++) {
195 res = &hose->regions[i];
197 if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
200 if (res->flags & skip_mask)
203 if (bus_addr >= res->bus_start &&
204 (bus_addr - res->bus_start) < res->size) {
205 *pa = (bus_addr - res->bus_start + res->phys_start);
213 phys_addr_t pci_hose_bus_to_phys(struct pci_controller *hose,
217 phys_addr_t phys_addr = 0;
221 puts("pci_hose_bus_to_phys: invalid hose\n");
226 /* The root controller has the region information */
227 hose = pci_bus_to_hose(0);
231 * if PCI_REGION_MEM is set we do a two pass search with preference
232 * on matches that don't have PCI_REGION_SYS_MEMORY set
234 if ((flags & PCI_REGION_MEM) == PCI_REGION_MEM) {
235 ret = __pci_hose_bus_to_phys(hose, bus_addr,
236 flags, PCI_REGION_SYS_MEMORY, &phys_addr);
241 ret = __pci_hose_bus_to_phys(hose, bus_addr, flags, 0, &phys_addr);
244 puts("pci_hose_bus_to_phys: invalid physical address\n");
249 int __pci_hose_phys_to_bus(struct pci_controller *hose,
250 phys_addr_t phys_addr,
252 unsigned long skip_mask,
255 struct pci_region *res;
259 for (i = 0; i < hose->region_count; i++) {
260 res = &hose->regions[i];
262 if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
265 if (res->flags & skip_mask)
268 bus_addr = phys_addr - res->phys_start + res->bus_start;
270 if (bus_addr >= res->bus_start &&
271 bus_addr < res->bus_start + res->size) {
280 pci_addr_t pci_hose_phys_to_bus(struct pci_controller *hose,
281 phys_addr_t phys_addr,
284 pci_addr_t bus_addr = 0;
288 puts("pci_hose_phys_to_bus: invalid hose\n");
293 /* The root controller has the region information */
294 hose = pci_bus_to_hose(0);
298 * if PCI_REGION_MEM is set we do a two pass search with preference
299 * on matches that don't have PCI_REGION_SYS_MEMORY set
301 if ((flags & PCI_REGION_MEM) == PCI_REGION_MEM) {
302 ret = __pci_hose_phys_to_bus(hose, phys_addr,
303 flags, PCI_REGION_SYS_MEMORY, &bus_addr);
308 ret = __pci_hose_phys_to_bus(hose, phys_addr, flags, 0, &bus_addr);
311 puts("pci_hose_phys_to_bus: invalid physical address\n");
316 pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index)
318 struct pci_device_id ids[2] = { {}, {0, 0} };
320 ids[0].vendor = vendor;
321 ids[0].device = device;
323 return pci_find_devices(ids, index);
326 pci_dev_t pci_hose_find_devices(struct pci_controller *hose, int busnum,
327 struct pci_device_id *ids, int *indexp)
335 for (bdf = PCI_BDF(busnum, 0, 0);
336 bdf < PCI_BDF(busnum + 1, 0, 0);
337 bdf += PCI_BDF(0, 0, 1)) {
338 if (pci_skip_dev(hose, bdf))
341 if (!PCI_FUNC(bdf)) {
342 pci_read_config_byte(bdf, PCI_HEADER_TYPE,
344 found_multi = header_type & 0x80;
350 pci_read_config_word(bdf, PCI_VENDOR_ID, &vendor);
351 pci_read_config_word(bdf, PCI_DEVICE_ID, &device);
353 for (i = 0; ids[i].vendor != 0; i++) {
354 if (vendor == ids[i].vendor &&
355 device == ids[i].device) {