src/device/pci_class.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <commonlib/bsd/helpers.h>
   4 #include <device/device.h>
   5 #include <device/pci.h>
   6 #include <device/pci_ops.h>
   7 #include <stddef.h>
   8
   9 typedef struct {
  10         const unsigned char subclass_id;
  11         const char *subclass_name;
  12 } PCI_SUBCLASS;
  13
  14 typedef struct {
  15         const unsigned char class_id;
  16         const PCI_SUBCLASS *subclass_list;
  17         const unsigned int subclass_entries;
  18         const char *class_name;
  19 } PCI_CLASS;
  20
  21 static const PCI_SUBCLASS unclassified[] = {
  22         { 0x00, "Non-VGA device" },
  23         { 0x01, "VGA compatible device" }
  24 };
  25
  26 static const PCI_SUBCLASS mass_storage[] = {
  27         { 0x00, "SCSI storage controller" },
  28         { 0x01, "IDE interface" },
  29         { 0x02, "Floppy disk controller" },
  30         { 0x03, "IPI bus controller" },
  31         { 0x04, "RAID bus controller" },
  32         { 0x05, "ATA controller" },
  33         { 0x06, "SATA controller" },
  34         { 0x07, "Serial Attached SCSI controller" },
  35         { 0x08, "Non-Volatile memory controller" },
  36         { 0x09, "Universal Flash Storage controller" },
  37         { 0x80, "Mass storage controller" }
  38 };
  39
  40 static const PCI_SUBCLASS network[] = {
  41         { 0x00, "Ethernet controller" },
  42         { 0x01, "Token ring network controller" },
  43         { 0x02, "FDDI network controller" },
  44         { 0x03, "ATM network controller" },
  45         { 0x04, "ISDN controller" },
  46         { 0x05, "WorldFip controller" },
  47         { 0x06, "PICMG controller" },
  48         { 0x07, "InfiniBand Controller" },
  49         { 0x08, "Host fabric controller" },
  50         { 0x80, "Network controller" }
  51 };
  52
  53 static const PCI_SUBCLASS display[] = {
  54         { 0x00, "VGA compatible controller" },
  55         { 0x01, "XGA compatible controller" },
  56         { 0x02, "3D controller" },
  57         { 0x80, "Display controller" }
  58 };
  59
  60 static const PCI_SUBCLASS multimedia[] = {
  61         { 0x00, "Multimedia video controller" },
  62         { 0x01, "Multimedia audio controller" },
  63         { 0x02, "Computer telephony device" },
  64         { 0x03, "Audio device" },
  65         { 0x80, "Multimedia controller" }
  66 };
  67
  68 static const PCI_SUBCLASS memory[] = {
  69         { 0x00, "RAM memory" },
  70         { 0x01, "FLASH memory" },
  71         { 0x80, "Memory controller" }
  72 };
  73
  74 static const PCI_SUBCLASS bridge[] = {
  75         { 0x00, "Host bridge" },
  76         { 0x01, "ISA bridge" },
  77         { 0x02, "EISA bridge" },
  78         { 0x03, "MicroChannel bridge" },
  79         { 0x04, "PCI bridge" },
  80         { 0x05, "PCMCIA bridge" },
  81         { 0x06, "NuBus bridge" },
  82         { 0x07, "CardBus bridge" },
  83         { 0x08, "RACEway bridge" },
  84         { 0x09, "Semi-transparent PCI-to-PCI bridge" },
  85         { 0x0a, "InfiniBand to PCI host bridge" },
  86         { 0x0b, "Advanced Switching to PCI host bridge" },
  87         { 0x80, "Bridge" }
  88 };
  89
  90 static const PCI_SUBCLASS communication[] = {
  91         { 0x00, "Serial controller" },
  92         { 0x01, "Parallel controller" },
  93         { 0x02, "Multiport serial controller" },
  94         { 0x03, "Modem" },
  95         { 0x04, "GPIB controller" },
  96         { 0x05, "Smart Card controller" },
  97         { 0x80, "Communication controller" }
  98 };
  99
 100 static const PCI_SUBCLASS generic[] = {
 101         { 0x00, "PIC" },
 102         { 0x01, "DMA controller" },
 103         { 0x02, "Timer" },
 104         { 0x03, "RTC" },
 105         { 0x04, "PCI Hot-plug controller" },
 106         { 0x05, "SD Host controller" },
 107         { 0x06, "IOMMU" },
 108         { 0x07, "Root Complex Event Collector" },
 109         { 0x80, "System peripheral" }
 110 };
 111
 112 static const PCI_SUBCLASS input_device[] = {
 113         { 0x00, "Keyboard controller" },
 114         { 0x01, "Digitizer Pen" },
 115         { 0x02, "Mouse controller" },
 116         { 0x03, "Scanner controller" },
 117         { 0x04, "Gameport controller" },
 118         { 0x80, "Input device controller" }
 119 };
 120
 121 static const PCI_SUBCLASS docking_station[] = {
 122         { 0x00, "Generic Docking Station" },
 123         { 0x80, "Docking Station" }
 124 };
 125
 126 static const PCI_SUBCLASS processor[] = {
 127         { 0x00, "386" },
 128         { 0x01, "486" },
 129         { 0x02, "Pentium" },
 130         { 0x10, "Alpha" },
 131         { 0x20, "Power PC" },
 132         { 0x30, "MIPS" },
 133         { 0x40, "Co-processor" },
 134         { 0x80, "Processor" }
 135 };
 136
 137 static const PCI_SUBCLASS serial_bus[] = {
 138         { 0x00, "FireWire (IEEE 1394)" },
 139         { 0x01, "ACCESS Bus" },
 140         { 0x02, "SSA" },
 141         { 0x03, "USB controller" },
 142         { 0x04, "Fibre Channel" },
 143         { 0x05, "SMBus" },
 144         { 0x06, "InfiniBand" },
 145         { 0x07, "IPMI SMIC interface" },
 146         { 0x08, "SERCOS interface" },
 147         { 0x09, "CANBUS" },
 148         { 0x0a, "MIPI I3C SM Host Controller Interface" },
 149         { 0x80, "Serial Bus Controller" }
 150 };
 151
 152 static const PCI_SUBCLASS wireless[] = {
 153         { 0x00, "IRDA controller" },
 154         { 0x01, "Consumer IR controller" },
 155         { 0x10, "RF controller" },
 156         { 0x11, "Bluetooth" },
 157         { 0x12, "Broadband" },
 158         { 0x20, "802.1a controller" },
 159         { 0x21, "802.1b controller" },
 160         { 0x40, "Cellular controller/modem" },
 161         { 0x41, "Cellular controller/modem plus Ethernet (802.11)" },
 162         { 0x80, "Wireless controller" }
 163 };
 164
 165 static const PCI_SUBCLASS intellegient_controller[] = {
 166         { 0x00, "I2O" }
 167 };
 168
 169 static const PCI_SUBCLASS satellite_controller[] = {
 170         { 0x01, "Satellite TV controller" },
 171         { 0x02, "Satellite audio communication controller" },
 172         { 0x03, "Satellite voice communication controller" },
 173         { 0x04, "Satellite data communication controller" }
 174 };
 175
 176 static const PCI_SUBCLASS encryption[] = {
 177         { 0x00, "Network and computing encryption device" },
 178         { 0x10, "Entertainment encryption device" },
 179         { 0x80, "Encryption controller" }
 180 };
 181
 182 static const PCI_SUBCLASS signal_processing[] = {
 183         { 0x00, "DPIO module" },
 184         { 0x01, "Performance counters" },
 185         { 0x10, "Communication synchronizer" },
 186         { 0x20, "Signal processing management" },
 187         { 0x80, "Signal processing controller" }
 188 };
 189
 190 static const PCI_CLASS class_list[] = {
 191         { 0x00, &unclassified[0], ARRAY_SIZE(unclassified),
 192                 "Unclassified device" },
 193         { 0x01, &mass_storage[0], ARRAY_SIZE(mass_storage), "Mass storage" },
 194         { 0x02, &network[0], ARRAY_SIZE(network), "Network" },
 195         { 0x03, &display[0], ARRAY_SIZE(display), "Display" },
 196         { 0x04, &multimedia[0], ARRAY_SIZE(multimedia), "Multimedia" },
 197         { 0x05, &memory[0], ARRAY_SIZE(memory), "Memory" },
 198         { 0x06, &bridge[0], ARRAY_SIZE(bridge), "Bridge" },
 199         { 0x07, &communication[0], ARRAY_SIZE(communication), "Communication" },
 200         { 0x08, &generic[0], ARRAY_SIZE(generic), "Generic system peripheral" },
 201         { 0x09, &input_device[0], ARRAY_SIZE(input_device), "Input device" },
 202         { 0x0a, &docking_station[0], ARRAY_SIZE(docking_station),
 203                 "Docking station" },
 204         { 0x0b, &processor[0], ARRAY_SIZE(processor), "Processor" },
 205         { 0x0c, &serial_bus[0], ARRAY_SIZE(serial_bus), "Serial bus" },
 206         { 0x0d, &wireless[0], ARRAY_SIZE(wireless), "Wireless" },
 207         { 0x0e, &intellegient_controller[0],
 208                         ARRAY_SIZE(intellegient_controller),
 209                         "Intelligent controller" },
 210         { 0x0f, &satellite_controller[0], ARRAY_SIZE(satellite_controller),
 211                         "Satellite communications" },
 212         { 0x10, &encryption[0], ARRAY_SIZE(encryption), "Encryption" },
 213         { 0x11, &signal_processing[0], ARRAY_SIZE(signal_processing),
 214                         "Signal processing" },
 215         { 0xff, NULL, 0, "Unassigned class" }
 216 };
 217 static const unsigned int class_entries = ARRAY_SIZE(class_list);
 218
 219 static const PCI_CLASS *get_pci_class_entry(struct device *dev)
 220 {
 221         unsigned char class;
 222         const PCI_CLASS *class_entry;
 223         const PCI_CLASS *class_list_end;
 224
 225         /* Get the PCI device class */
 226         class = pci_read_config8(dev, PCI_CLASS_DEVICE+1);
 227
 228         /* Locate the class entry */
 229         class_entry = &class_list[0];
 230         class_list_end = &class_entry[class_entries];
 231         while (class_list_end > class_entry) {
 232                 if (class_entry->class_id == class)
 233                         return class_entry;
 234                 class_entry += 1;
 235         }
 236         return NULL;
 237 }
 238
 239 const char *get_pci_class_name(struct device *dev)
 240 {
 241         const PCI_CLASS *class_entry;
 242
 243         class_entry = get_pci_class_entry(dev);
 244         return class_entry ? class_entry->class_name : "???";
 245 }
 246
 247 const char *get_pci_subclass_name(struct device *dev)
 248 {
 249         const PCI_CLASS *class_entry;
 250         unsigned char subclass;
 251         const PCI_SUBCLASS *subclass_entry;
 252         const PCI_SUBCLASS *subclass_list_end;
 253         const char *subclass_name;
 254
 255         /* Get the PCI device subclass */
 256         subclass = pci_read_config8(dev, PCI_CLASS_DEVICE);
 257
 258         /* Locate the subclass name */
 259         subclass_name = "???";
 260         class_entry = get_pci_class_entry(dev);
 261         subclass_entry = class_entry ? class_entry->subclass_list : NULL;
 262         if (subclass_entry != NULL) {
 263                 subclass_list_end =
 264                         &subclass_entry[class_entry->subclass_entries];
 265                 while (subclass_list_end > subclass_entry) {
 266                         if (subclass_entry->subclass_id == subclass) {
 267                                 subclass_name = subclass_entry->subclass_name;
 268                                 break;
 269                         }
 270                         subclass_entry += 1;
 271                 }
 272         }
 273         return subclass_name;
 274 }