drivers/gpu/drm/ast/ast_dp501.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <linux/delay.h>
   4 #include <linux/firmware.h>
   5 #include <linux/module.h>
   6
   7 #include "ast_drv.h"
   8
   9 MODULE_FIRMWARE("ast_dp501_fw.bin");
  10
  11 static void ast_release_firmware(void *data)
  12 {
  13         struct ast_device *ast = data;
  14
  15         release_firmware(ast->dp501_fw);
  16         ast->dp501_fw = NULL;
  17 }
  18
  19 static int ast_load_dp501_microcode(struct drm_device *dev)
  20 {
  21         struct ast_device *ast = to_ast_device(dev);
  22         int ret;
  23
  24         ret = request_firmware(&ast->dp501_fw, "ast_dp501_fw.bin", dev->dev);
  25         if (ret)
  26                 return ret;
  27
  28         return devm_add_action_or_reset(dev->dev, ast_release_firmware, ast);
  29 }
  30
  31 static void send_ack(struct ast_device *ast)
  32 {
  33         u8 sendack;
  34         sendack = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0x9b, 0xff);
  35         sendack |= 0x80;
  36         ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x9b, 0x00, sendack);
  37 }
  38
  39 static void send_nack(struct ast_device *ast)
  40 {
  41         u8 sendack;
  42         sendack = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0x9b, 0xff);
  43         sendack &= ~0x80;
  44         ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x9b, 0x00, sendack);
  45 }
  46
  47 static bool wait_ack(struct ast_device *ast)
  48 {
  49         u8 waitack;
  50         u32 retry = 0;
  51         do {
  52                 waitack = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd2, 0xff);
  53                 waitack &= 0x80;
  54                 udelay(100);
  55         } while ((!waitack) && (retry++ < 1000));
  56
  57         if (retry < 1000)
  58                 return true;
  59         else
  60                 return false;
  61 }
  62
  63 static bool wait_nack(struct ast_device *ast)
  64 {
  65         u8 waitack;
  66         u32 retry = 0;
  67         do {
  68                 waitack = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd2, 0xff);
  69                 waitack &= 0x80;
  70                 udelay(100);
  71         } while ((waitack) && (retry++ < 1000));
  72
  73         if (retry < 1000)
  74                 return true;
  75         else
  76                 return false;
  77 }
  78
  79 static void set_cmd_trigger(struct ast_device *ast)
  80 {
  81         ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x9b, ~0x40, 0x40);
  82 }
  83
  84 static void clear_cmd_trigger(struct ast_device *ast)
  85 {
  86         ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x9b, ~0x40, 0x00);
  87 }
  88
  89 #if 0
  90 static bool wait_fw_ready(struct ast_device *ast)
  91 {
  92         u8 waitready;
  93         u32 retry = 0;
  94         do {
  95                 waitready = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd2, 0xff);
  96                 waitready &= 0x40;
  97                 udelay(100);
  98         } while ((!waitready) && (retry++ < 1000));
  99
 100         if (retry < 1000)
 101                 return true;
 102         else
 103                 return false;
 104 }
 105 #endif
 106
 107 static bool ast_write_cmd(struct drm_device *dev, u8 data)
 108 {
 109         struct ast_device *ast = to_ast_device(dev);
 110         int retry = 0;
 111         if (wait_nack(ast)) {
 112                 send_nack(ast);
 113                 ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x9a, 0x00, data);
 114                 send_ack(ast);
 115                 set_cmd_trigger(ast);
 116                 do {
 117                         if (wait_ack(ast)) {
 118                                 clear_cmd_trigger(ast);
 119                                 send_nack(ast);
 120                                 return true;
 121                         }
 122                 } while (retry++ < 100);
 123         }
 124         clear_cmd_trigger(ast);
 125         send_nack(ast);
 126         return false;
 127 }
 128
 129 static bool ast_write_data(struct drm_device *dev, u8 data)
 130 {
 131         struct ast_device *ast = to_ast_device(dev);
 132
 133         if (wait_nack(ast)) {
 134                 send_nack(ast);
 135                 ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x9a, 0x00, data);
 136                 send_ack(ast);
 137                 if (wait_ack(ast)) {
 138                         send_nack(ast);
 139                         return true;
 140                 }
 141         }
 142         send_nack(ast);
 143         return false;
 144 }
 145
 146 #if 0
 147 static bool ast_read_data(struct drm_device *dev, u8 *data)
 148 {
 149         struct ast_device *ast = to_ast_device(dev);
 150         u8 tmp;
 151
 152         *data = 0;
 153
 154         if (wait_ack(ast) == false)
 155                 return false;
 156         tmp = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd3, 0xff);
 157         *data = tmp;
 158         if (wait_nack(ast) == false) {
 159                 send_nack(ast);
 160                 return false;
 161         }
 162         send_nack(ast);
 163         return true;
 164 }
 165
 166 static void clear_cmd(struct ast_device *ast)
 167 {
 168         send_nack(ast);
 169         ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x9a, 0x00, 0x00);
 170 }
 171 #endif
 172
 173 void ast_set_dp501_video_output(struct drm_device *dev, u8 mode)
 174 {
 175         ast_write_cmd(dev, 0x40);
 176         ast_write_data(dev, mode);
 177
 178         msleep(10);
 179 }
 180
 181 static u32 get_fw_base(struct ast_device *ast)
 182 {
 183         return ast_mindwm(ast, 0x1e6e2104) & 0x7fffffff;
 184 }
 185
 186 bool ast_backup_fw(struct drm_device *dev, u8 *addr, u32 size)
 187 {
 188         struct ast_device *ast = to_ast_device(dev);
 189         u32 i, data;
 190         u32 boot_address;
 191
 192         if (ast->config_mode != ast_use_p2a)
 193                 return false;
 194
 195         data = ast_mindwm(ast, 0x1e6e2100) & 0x01;
 196         if (data) {
 197                 boot_address = get_fw_base(ast);
 198                 for (i = 0; i < size; i += 4)
 199                         *(u32 *)(addr + i) = ast_mindwm(ast, boot_address + i);
 200                 return true;
 201         }
 202         return false;
 203 }
 204
 205 static bool ast_launch_m68k(struct drm_device *dev)
 206 {
 207         struct ast_device *ast = to_ast_device(dev);
 208         u32 i, data, len = 0;
 209         u32 boot_address;
 210         u8 *fw_addr = NULL;
 211         u8 jreg;
 212
 213         if (ast->config_mode != ast_use_p2a)
 214                 return false;
 215
 216         data = ast_mindwm(ast, 0x1e6e2100) & 0x01;
 217         if (!data) {
 218
 219                 if (ast->dp501_fw_addr) {
 220                         fw_addr = ast->dp501_fw_addr;
 221                         len = 32*1024;
 222                 } else {
 223                         if (!ast->dp501_fw &&
 224                             ast_load_dp501_microcode(dev) < 0)
 225                                 return false;
 226
 227                         fw_addr = (u8 *)ast->dp501_fw->data;
 228                         len = ast->dp501_fw->size;
 229                 }
 230                 /* Get BootAddress */
 231                 ast_moutdwm(ast, 0x1e6e2000, 0x1688a8a8);
 232                 data = ast_mindwm(ast, 0x1e6e0004);
 233                 switch (data & 0x03) {
 234                 case 0:
 235                         boot_address = 0x44000000;
 236                         break;
 237                 default:
 238                 case 1:
 239                         boot_address = 0x48000000;
 240                         break;
 241                 case 2:
 242                         boot_address = 0x50000000;
 243                         break;
 244                 case 3:
 245                         boot_address = 0x60000000;
 246                         break;
 247                 }
 248                 boot_address -= 0x200000; /* -2MB */
 249
 250                 /* copy image to buffer */
 251                 for (i = 0; i < len; i += 4) {
 252                         data = *(u32 *)(fw_addr + i);
 253                         ast_moutdwm(ast, boot_address + i, data);
 254                 }
 255
 256                 /* Init SCU */
 257                 ast_moutdwm(ast, 0x1e6e2000, 0x1688a8a8);
 258
 259                 /* Launch FW */
 260                 ast_moutdwm(ast, 0x1e6e2104, 0x80000000 + boot_address);
 261                 ast_moutdwm(ast, 0x1e6e2100, 1);
 262
 263                 /* Update Scratch */
 264                 data = ast_mindwm(ast, 0x1e6e2040) & 0xfffff1ff;                /* D[11:9] = 100b: UEFI handling */
 265                 data |= 0x800;
 266                 ast_moutdwm(ast, 0x1e6e2040, data);
 267
 268                 jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0x99, 0xfc); /* D[1:0]: Reserved Video Buffer */
 269                 jreg |= 0x02;
 270                 ast_set_index_reg(ast, AST_IO_VGACRI, 0x99, jreg);
 271         }
 272         return true;
 273 }
 274
 275 bool ast_dp501_is_connected(struct ast_device *ast)
 276 {
 277         u32 boot_address, offset, data;
 278
 279         if (ast->config_mode == ast_use_p2a) {
 280                 boot_address = get_fw_base(ast);
 281
 282                 /* validate FW version */
 283                 offset = AST_DP501_GBL_VERSION;
 284                 data = ast_mindwm(ast, boot_address + offset);
 285                 if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1)
 286                         return false;
 287
 288                 /* validate PnP Monitor */
 289                 offset = AST_DP501_PNPMONITOR;
 290                 data = ast_mindwm(ast, boot_address + offset);
 291                 if (!(data & AST_DP501_PNP_CONNECTED))
 292                         return false;
 293         } else {
 294                 if (!ast->dp501_fw_buf)
 295                         return false;
 296
 297                 /* dummy read */
 298                 offset = 0x0000;
 299                 data = readl(ast->dp501_fw_buf + offset);
 300
 301                 /* validate FW version */
 302                 offset = AST_DP501_GBL_VERSION;
 303                 data = readl(ast->dp501_fw_buf + offset);
 304                 if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1)
 305                         return false;
 306
 307                 /* validate PnP Monitor */
 308                 offset = AST_DP501_PNPMONITOR;
 309                 data = readl(ast->dp501_fw_buf + offset);
 310                 if (!(data & AST_DP501_PNP_CONNECTED))
 311                         return false;
 312         }
 313         return true;
 314 }
 315
 316 bool ast_dp501_read_edid(struct drm_device *dev, u8 *ediddata)
 317 {
 318         struct ast_device *ast = to_ast_device(dev);
 319         u32 i, boot_address, offset, data;
 320         u32 *pEDIDidx;
 321
 322         if (!ast_dp501_is_connected(ast))
 323                 return false;
 324
 325         if (ast->config_mode == ast_use_p2a) {
 326                 boot_address = get_fw_base(ast);
 327
 328                 /* Read EDID */
 329                 offset = AST_DP501_EDID_DATA;
 330                 for (i = 0; i < 128; i += 4) {
 331                         data = ast_mindwm(ast, boot_address + offset + i);
 332                         pEDIDidx = (u32 *)(ediddata + i);
 333                         *pEDIDidx = data;
 334                 }
 335         } else {
 336                 /* Read EDID */
 337                 offset = AST_DP501_EDID_DATA;
 338                 for (i = 0; i < 128; i += 4) {
 339                         data = readl(ast->dp501_fw_buf + offset + i);
 340                         pEDIDidx = (u32 *)(ediddata + i);
 341                         *pEDIDidx = data;
 342                 }
 343         }
 344
 345         return true;
 346 }
 347
 348 static bool ast_init_dvo(struct drm_device *dev)
 349 {
 350         struct ast_device *ast = to_ast_device(dev);
 351         u8 jreg;
 352         u32 data;
 353         ast_write32(ast, 0xf004, 0x1e6e0000);
 354         ast_write32(ast, 0xf000, 0x1);
 355         ast_write32(ast, 0x12000, 0x1688a8a8);
 356
 357         jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
 358         if (!(jreg & 0x80)) {
 359                 /* Init SCU DVO Settings */
 360                 data = ast_read32(ast, 0x12008);
 361                 /* delay phase */
 362                 data &= 0xfffff8ff;
 363                 data |= 0x00000500;
 364                 ast_write32(ast, 0x12008, data);
 365
 366                 if (IS_AST_GEN4(ast)) {
 367                         data = ast_read32(ast, 0x12084);
 368                         /* multi-pins for DVO single-edge */
 369                         data |= 0xfffe0000;
 370                         ast_write32(ast, 0x12084, data);
 371
 372                         data = ast_read32(ast, 0x12088);
 373                         /* multi-pins for DVO single-edge */
 374                         data |= 0x000fffff;
 375                         ast_write32(ast, 0x12088, data);
 376
 377                         data = ast_read32(ast, 0x12090);
 378                         /* multi-pins for DVO single-edge */
 379                         data &= 0xffffffcf;
 380                         data |= 0x00000020;
 381                         ast_write32(ast, 0x12090, data);
 382                 } else { /* AST GEN5+ */
 383                         data = ast_read32(ast, 0x12088);
 384                         /* multi-pins for DVO single-edge */
 385                         data |= 0x30000000;
 386                         ast_write32(ast, 0x12088, data);
 387
 388                         data = ast_read32(ast, 0x1208c);
 389                         /* multi-pins for DVO single-edge */
 390                         data |= 0x000000cf;
 391                         ast_write32(ast, 0x1208c, data);
 392
 393                         data = ast_read32(ast, 0x120a4);
 394                         /* multi-pins for DVO single-edge */
 395                         data |= 0xffff0000;
 396                         ast_write32(ast, 0x120a4, data);
 397
 398                         data = ast_read32(ast, 0x120a8);
 399                         /* multi-pins for DVO single-edge */
 400                         data |= 0x0000000f;
 401                         ast_write32(ast, 0x120a8, data);
 402
 403                         data = ast_read32(ast, 0x12094);
 404                         /* multi-pins for DVO single-edge */
 405                         data |= 0x00000002;
 406                         ast_write32(ast, 0x12094, data);
 407                 }
 408         }
 409
 410         /* Force to DVO */
 411         data = ast_read32(ast, 0x1202c);
 412         data &= 0xfffbffff;
 413         ast_write32(ast, 0x1202c, data);
 414
 415         /* Init VGA DVO Settings */
 416         ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x80);
 417         return true;
 418 }
 419
 420
 421 static void ast_init_analog(struct drm_device *dev)
 422 {
 423         struct ast_device *ast = to_ast_device(dev);
 424         u32 data;
 425
 426         /*
 427          * Set DAC source to VGA mode in SCU2C via the P2A
 428          * bridge. First configure the P2U to target the SCU
 429          * in case it isn't at this stage.
 430          */
 431         ast_write32(ast, 0xf004, 0x1e6e0000);
 432         ast_write32(ast, 0xf000, 0x1);
 433
 434         /* Then unlock the SCU with the magic password */
 435         ast_write32(ast, 0x12000, 0x1688a8a8);
 436         ast_write32(ast, 0x12000, 0x1688a8a8);
 437         ast_write32(ast, 0x12000, 0x1688a8a8);
 438
 439         /* Finally, clear bits [17:16] of SCU2c */
 440         data = ast_read32(ast, 0x1202c);
 441         data &= 0xfffcffff;
 442         ast_write32(ast, 0, data);
 443
 444         /* Disable DVO */
 445         ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x00);
 446 }
 447
 448 void ast_init_3rdtx(struct drm_device *dev)
 449 {
 450         struct ast_device *ast = to_ast_device(dev);
 451         u8 jreg;
 452
 453         if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast)) {
 454                 jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd1, 0xff);
 455                 switch (jreg & 0x0e) {
 456                 case 0x04:
 457                         ast_init_dvo(dev);
 458                         break;
 459                 case 0x08:
 460                         ast_launch_m68k(dev);
 461                         break;
 462                 case 0x0c:
 463                         ast_init_dvo(dev);
 464                         break;
 465                 default:
 466                         if (ast->tx_chip_types & BIT(AST_TX_SIL164))
 467                                 ast_init_dvo(dev);
 468                         else
 469                                 ast_init_analog(dev);
 470                 }
 471         }
 472 }