drivers/fpga/fpga.c

   1 /*
   2  * (C) Copyright 2002
   3  * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /* Generic FPGA support */
   9 #include <common.h>             /* core U-Boot definitions */
  10 #include <xilinx.h>             /* xilinx specific definitions */
  11 #include <altera.h>             /* altera specific definitions */
  12 #include <lattice.h>
  13
  14 /* Local definitions */
  15 #ifndef CONFIG_MAX_FPGA_DEVICES
  16 #define CONFIG_MAX_FPGA_DEVICES         5
  17 #endif
  18
  19 /* Local static data */
  20 static int next_desc = FPGA_INVALID_DEVICE;
  21 static fpga_desc desc_table[CONFIG_MAX_FPGA_DEVICES];
  22
  23 /*
  24  * fpga_no_sup
  25  * 'no support' message function
  26  */
  27 static void fpga_no_sup(char *fn, char *msg)
  28 {
  29         if (fn && msg)
  30                 printf("%s: No support for %s.\n", fn, msg);
  31         else if (msg)
  32                 printf("No support for %s.\n", msg);
  33         else
  34                 printf("No FPGA suport!\n");
  35 }
  36
  37
  38 /* fpga_get_desc
  39  *      map a device number to a descriptor
  40  */
  41 static const fpga_desc *const fpga_get_desc(int devnum)
  42 {
  43         fpga_desc *desc = (fpga_desc *)NULL;
  44
  45         if ((devnum >= 0) && (devnum < next_desc)) {
  46                 desc = &desc_table[devnum];
  47                 debug("%s: found fpga descriptor #%d @ 0x%p\n",
  48                       __func__, devnum, desc);
  49         }
  50
  51         return desc;
  52 }
  53
  54 /*
  55  * fpga_validate
  56  *      generic parameter checking code
  57  */
  58 const fpga_desc *const fpga_validate(int devnum, const void *buf,
  59                                      size_t bsize, char *fn)
  60 {
  61         const fpga_desc *desc = fpga_get_desc(devnum);
  62
  63         if (!desc)
  64                 printf("%s: Invalid device number %d\n", fn, devnum);
  65
  66         if (!buf) {
  67                 printf("%s: Null buffer.\n", fn);
  68                 return (fpga_desc * const)NULL;
  69         }
  70         return desc;
  71 }
  72
  73 /*
  74  * fpga_dev_info
  75  *      generic multiplexing code
  76  */
  77 static int fpga_dev_info(int devnum)
  78 {
  79         int ret_val = FPGA_FAIL; /* assume failure */
  80         const fpga_desc * const desc = fpga_get_desc(devnum);
  81
  82         if (desc) {
  83                 debug("%s: Device Descriptor @ 0x%p\n",
  84                       __func__, desc->devdesc);
  85
  86                 switch (desc->devtype) {
  87                 case fpga_xilinx:
  88 #if defined(CONFIG_FPGA_XILINX)
  89                         printf("Xilinx Device\nDescriptor @ 0x%p\n", desc);
  90                         ret_val = xilinx_info(desc->devdesc);
  91 #else
  92                         fpga_no_sup((char *)__func__, "Xilinx devices");
  93 #endif
  94                         break;
  95                 case fpga_altera:
  96 #if defined(CONFIG_FPGA_ALTERA)
  97                         printf("Altera Device\nDescriptor @ 0x%p\n", desc);
  98                         ret_val = altera_info(desc->devdesc);
  99 #else
 100                         fpga_no_sup((char *)__func__, "Altera devices");
 101 #endif
 102                         break;
 103                 case fpga_lattice:
 104 #if defined(CONFIG_FPGA_LATTICE)
 105                         printf("Lattice Device\nDescriptor @ 0x%p\n", desc);
 106                         ret_val = lattice_info(desc->devdesc);
 107 #else
 108                         fpga_no_sup((char *)__func__, "Lattice devices");
 109 #endif
 110                         break;
 111                 default:
 112                         printf("%s: Invalid or unsupported device type %d\n",
 113                                __func__, desc->devtype);
 114                 }
 115         } else {
 116                 printf("%s: Invalid device number %d\n", __func__, devnum);
 117         }
 118
 119         return ret_val;
 120 }
 121
 122 /*
 123  * fgpa_init is usually called from misc_init_r() and MUST be called
 124  * before any of the other fpga functions are used.
 125  */
 126 void fpga_init(void)
 127 {
 128         next_desc = 0;
 129         memset(desc_table, 0, sizeof(desc_table));
 130
 131         debug("%s\n", __func__);
 132 }
 133
 134 /*
 135  * fpga_count
 136  * Basic interface function to get the current number of devices available.
 137  */
 138 int fpga_count(void)
 139 {
 140         return next_desc;
 141 }
 142
 143 /*
 144  * fpga_add
 145  *      Add the device descriptor to the device table.
 146  */
 147 int fpga_add(fpga_type devtype, void *desc)
 148 {
 149         int devnum = FPGA_INVALID_DEVICE;
 150
 151         if (next_desc < 0) {
 152                 printf("%s: FPGA support not initialized!\n", __func__);
 153         } else if ((devtype > fpga_min_type) && (devtype < fpga_undefined)) {
 154                 if (desc) {
 155                         if (next_desc < CONFIG_MAX_FPGA_DEVICES) {
 156                                 devnum = next_desc;
 157                                 desc_table[next_desc].devtype = devtype;
 158                                 desc_table[next_desc++].devdesc = desc;
 159                         } else {
 160                                 printf("%s: Exceeded Max FPGA device count\n",
 161                                        __func__);
 162                         }
 163                 } else {
 164                         printf("%s: NULL device descriptor\n", __func__);
 165                 }
 166         } else {
 167                 printf("%s: Unsupported FPGA type %d\n", __func__, devtype);
 168         }
 169
 170         return devnum;
 171 }
 172
 173 /*
 174  * Convert bitstream data and load into the fpga
 175  */
 176 int __weak fpga_loadbitstream(int devnum, char *fpgadata, size_t size)
 177 {
 178         printf("Bitstream support not implemented for this FPGA device\n");
 179         return FPGA_FAIL;
 180 }
 181
 182 /*
 183  * Generic multiplexing code
 184  */
 185 int fpga_load(int devnum, const void *buf, size_t bsize)
 186 {
 187         int ret_val = FPGA_FAIL;           /* assume failure */
 188         const fpga_desc *desc = fpga_validate(devnum, buf, bsize,
 189                                               (char *)__func__);
 190
 191         if (desc) {
 192                 switch (desc->devtype) {
 193                 case fpga_xilinx:
 194 #if defined(CONFIG_FPGA_XILINX)
 195                         ret_val = xilinx_load(desc->devdesc, buf, bsize);
 196 #else
 197                         fpga_no_sup((char *)__func__, "Xilinx devices");
 198 #endif
 199                         break;
 200                 case fpga_altera:
 201 #if defined(CONFIG_FPGA_ALTERA)
 202                         ret_val = altera_load(desc->devdesc, buf, bsize);
 203 #else
 204                         fpga_no_sup((char *)__func__, "Altera devices");
 205 #endif
 206                         break;
 207                 case fpga_lattice:
 208 #if defined(CONFIG_FPGA_LATTICE)
 209                         ret_val = lattice_load(desc->devdesc, buf, bsize);
 210 #else
 211                         fpga_no_sup((char *)__func__, "Lattice devices");
 212 #endif
 213                         break;
 214                 default:
 215                         printf("%s: Invalid or unsupported device type %d\n",
 216                                __func__, desc->devtype);
 217                 }
 218         }
 219
 220         return ret_val;
 221 }
 222
 223 /*
 224  * fpga_dump
 225  *      generic multiplexing code
 226  */
 227 int fpga_dump(int devnum, const void *buf, size_t bsize)
 228 {
 229         int ret_val = FPGA_FAIL;           /* assume failure */
 230         const fpga_desc *desc = fpga_validate(devnum, buf, bsize,
 231                                               (char *)__func__);
 232
 233         if (desc) {
 234                 switch (desc->devtype) {
 235                 case fpga_xilinx:
 236 #if defined(CONFIG_FPGA_XILINX)
 237                         ret_val = xilinx_dump(desc->devdesc, buf, bsize);
 238 #else
 239                         fpga_no_sup((char *)__func__, "Xilinx devices");
 240 #endif
 241                         break;
 242                 case fpga_altera:
 243 #if defined(CONFIG_FPGA_ALTERA)
 244                         ret_val = altera_dump(desc->devdesc, buf, bsize);
 245 #else
 246                         fpga_no_sup((char *)__func__, "Altera devices");
 247 #endif
 248                         break;
 249                 case fpga_lattice:
 250 #if defined(CONFIG_FPGA_LATTICE)
 251                         ret_val = lattice_dump(desc->devdesc, buf, bsize);
 252 #else
 253                         fpga_no_sup((char *)__func__, "Lattice devices");
 254 #endif
 255                         break;
 256                 default:
 257                         printf("%s: Invalid or unsupported device type %d\n",
 258                                __func__, desc->devtype);
 259                 }
 260         }
 261
 262         return ret_val;
 263 }
 264
 265 /*
 266  * fpga_info
 267  *      front end to fpga_dev_info.  If devnum is invalid, report on all
 268  *      available devices.
 269  */
 270 int fpga_info(int devnum)
 271 {
 272         if (devnum == FPGA_INVALID_DEVICE) {
 273                 if (next_desc > 0) {
 274                         int dev;
 275
 276                         for (dev = 0; dev < next_desc; dev++)
 277                                 fpga_dev_info(dev);
 278
 279                         return FPGA_SUCCESS;
 280                 } else {
 281                         printf("%s: No FPGA devices available.\n", __func__);
 282                         return FPGA_FAIL;
 283                 }
 284         }
 285
 286         return fpga_dev_info(devnum);
 287 }