1 /* 2 * Copyright 2012 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sub license, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 18 * USE OR OTHER DEALINGS IN THE SOFTWARE. 19 * 20 * The above copyright notice and this permission notice (including the 21 * next paragraph) shall be included in all copies or substantial portions 22 * of the Software. 23 * 24 */ 25 /* 26 * Authors: Dave Airlie <airlied@redhat.com> 27 */ 28 29 #include <linux/pci.h> 30 31 #include <drm/drm_atomic_helper.h> 32 #include <drm/drm_drv.h> 33 #include <drm/drm_gem.h> 34 #include <drm/drm_managed.h> 35 36 #include "ast_drv.h" 37 38 void ast_set_index_reg_mask(struct ast_device *ast, 39 uint32_t base, uint8_t index, 40 uint8_t mask, uint8_t val) 41 { 42 u8 tmp; 43 ast_io_write8(ast, base, index); 44 tmp = (ast_io_read8(ast, base + 1) & mask) | val; 45 ast_set_index_reg(ast, base, index, tmp); 46 } 47 48 uint8_t ast_get_index_reg(struct ast_device *ast, 49 uint32_t base, uint8_t index) 50 { 51 uint8_t ret; 52 ast_io_write8(ast, base, index); 53 ret = ast_io_read8(ast, base + 1); 54 return ret; 55 } 56 57 uint8_t ast_get_index_reg_mask(struct ast_device *ast, 58 uint32_t base, uint8_t index, uint8_t mask) 59 { 60 uint8_t ret; 61 ast_io_write8(ast, base, index); 62 ret = ast_io_read8(ast, base + 1) & mask; 63 return ret; 64 } 65 66 static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev) 67 { 68 struct device_node *np = dev->dev->of_node; 69 struct ast_device *ast = to_ast_device(dev); 70 struct pci_dev *pdev = to_pci_dev(dev->dev); 71 uint32_t data, jregd0, jregd1; 72 73 /* Defaults */ 74 ast->config_mode = ast_use_defaults; 75 *scu_rev = 0xffffffff; 76 77 /* Check if we have device-tree properties */ 78 if (np && !of_property_read_u32(np, "aspeed,scu-revision-id", 79 scu_rev)) { 80 /* We do, disable P2A access */ 81 ast->config_mode = ast_use_dt; 82 drm_info(dev, "Using device-tree for configuration\n"); 83 return; 84 } 85 86 /* Not all families have a P2A bridge */ 87 if (pdev->device != PCI_CHIP_AST2000) 88 return; 89 90 /* 91 * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge 92 * is disabled. We force using P2A if VGA only mode bit 93 * is set D[7] 94 */ 95 jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); 96 jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); 97 if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) { 98 /* Patch AST2500 */ 99 if (((pdev->revision & 0xF0) == 0x40) 100 && ((jregd0 & AST_VRAM_INIT_STATUS_MASK) == 0)) 101 ast_patch_ahb_2500(ast); 102 103 /* Double check it's actually working */ 104 data = ast_read32(ast, 0xf004); 105 if ((data != 0xFFFFFFFF) && (data != 0x00)) { 106 /* P2A works, grab silicon revision */ 107 ast->config_mode = ast_use_p2a; 108 109 drm_info(dev, "Using P2A bridge for configuration\n"); 110 111 /* Read SCU7c (silicon revision register) */ 112 ast_write32(ast, 0xf004, 0x1e6e0000); 113 ast_write32(ast, 0xf000, 0x1); 114 *scu_rev = ast_read32(ast, 0x1207c); 115 return; 116 } 117 } 118 119 /* We have a P2A bridge but it's disabled */ 120 drm_info(dev, "P2A bridge disabled, using default configuration\n"); 121 } 122 123 static int ast_detect_chip(struct drm_device *dev, bool *need_post) 124 { 125 struct ast_device *ast = to_ast_device(dev); 126 struct pci_dev *pdev = to_pci_dev(dev->dev); 127 uint32_t jreg, scu_rev; 128 129 /* 130 * If VGA isn't enabled, we need to enable now or subsequent 131 * access to the scratch registers will fail. We also inform 132 * our caller that it needs to POST the chip 133 * (Assumption: VGA not enabled -> need to POST) 134 */ 135 if (!ast_is_vga_enabled(dev)) { 136 ast_enable_vga(dev); 137 drm_info(dev, "VGA not enabled on entry, requesting chip POST\n"); 138 *need_post = true; 139 } else 140 *need_post = false; 141 142 143 /* Enable extended register access */ 144 ast_open_key(ast); 145 ast_enable_mmio(dev); 146 147 /* Find out whether P2A works or whether to use device-tree */ 148 ast_detect_config_mode(dev, &scu_rev); 149 150 /* Identify chipset */ 151 if (pdev->revision >= 0x50) { 152 ast->chip = AST2600; 153 drm_info(dev, "AST 2600 detected\n"); 154 } else if (pdev->revision >= 0x40) { 155 ast->chip = AST2500; 156 drm_info(dev, "AST 2500 detected\n"); 157 } else if (pdev->revision >= 0x30) { 158 ast->chip = AST2400; 159 drm_info(dev, "AST 2400 detected\n"); 160 } else if (pdev->revision >= 0x20) { 161 ast->chip = AST2300; 162 drm_info(dev, "AST 2300 detected\n"); 163 } else if (pdev->revision >= 0x10) { 164 switch (scu_rev & 0x0300) { 165 case 0x0200: 166 ast->chip = AST1100; 167 drm_info(dev, "AST 1100 detected\n"); 168 break; 169 case 0x0100: 170 ast->chip = AST2200; 171 drm_info(dev, "AST 2200 detected\n"); 172 break; 173 case 0x0000: 174 ast->chip = AST2150; 175 drm_info(dev, "AST 2150 detected\n"); 176 break; 177 default: 178 ast->chip = AST2100; 179 drm_info(dev, "AST 2100 detected\n"); 180 break; 181 } 182 ast->vga2_clone = false; 183 } else { 184 ast->chip = AST2000; 185 drm_info(dev, "AST 2000 detected\n"); 186 } 187 188 /* Check if we support wide screen */ 189 switch (ast->chip) { 190 case AST2000: 191 ast->support_wide_screen = false; 192 break; 193 default: 194 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); 195 if (!(jreg & 0x80)) 196 ast->support_wide_screen = true; 197 else if (jreg & 0x01) 198 ast->support_wide_screen = true; 199 else { 200 ast->support_wide_screen = false; 201 if (ast->chip == AST2300 && 202 (scu_rev & 0x300) == 0x0) /* ast1300 */ 203 ast->support_wide_screen = true; 204 if (ast->chip == AST2400 && 205 (scu_rev & 0x300) == 0x100) /* ast1400 */ 206 ast->support_wide_screen = true; 207 if (ast->chip == AST2500 && 208 scu_rev == 0x100) /* ast2510 */ 209 ast->support_wide_screen = true; 210 if (ast->chip == AST2600) /* ast2600 */ 211 ast->support_wide_screen = true; 212 } 213 break; 214 } 215 216 /* Check 3rd Tx option (digital output afaik) */ 217 ast->tx_chip_types |= AST_TX_NONE_BIT; 218 219 /* 220 * VGACRA3 Enhanced Color Mode Register, check if DVO is already 221 * enabled, in that case, assume we have a SIL164 TMDS transmitter 222 * 223 * Don't make that assumption if we the chip wasn't enabled and 224 * is at power-on reset, otherwise we'll incorrectly "detect" a 225 * SIL164 when there is none. 226 */ 227 if (!*need_post) { 228 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff); 229 if (jreg & 0x80) 230 ast->tx_chip_types = AST_TX_SIL164_BIT; 231 } 232 233 if ((ast->chip == AST2300) || (ast->chip == AST2400) || (ast->chip == AST2500)) { 234 /* 235 * On AST2300 and 2400, look the configuration set by the SoC in 236 * the SOC scratch register #1 bits 11:8 (interestingly marked 237 * as "reserved" in the spec) 238 */ 239 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); 240 switch (jreg) { 241 case 0x04: 242 ast->tx_chip_types = AST_TX_SIL164_BIT; 243 break; 244 case 0x08: 245 ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL); 246 if (ast->dp501_fw_addr) { 247 /* backup firmware */ 248 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) { 249 drmm_kfree(dev, ast->dp501_fw_addr); 250 ast->dp501_fw_addr = NULL; 251 } 252 } 253 fallthrough; 254 case 0x0c: 255 ast->tx_chip_types = AST_TX_DP501_BIT; 256 } 257 } else if (ast->chip == AST2600) 258 ast_dp_launch(&ast->base, 0); 259 260 /* Print stuff for diagnostic purposes */ 261 if (ast->tx_chip_types & AST_TX_NONE_BIT) 262 drm_info(dev, "Using analog VGA\n"); 263 if (ast->tx_chip_types & AST_TX_SIL164_BIT) 264 drm_info(dev, "Using Sil164 TMDS transmitter\n"); 265 if (ast->tx_chip_types & AST_TX_DP501_BIT) 266 drm_info(dev, "Using DP501 DisplayPort transmitter\n"); 267 268 return 0; 269 } 270 271 static int ast_get_dram_info(struct drm_device *dev) 272 { 273 struct device_node *np = dev->dev->of_node; 274 struct ast_device *ast = to_ast_device(dev); 275 uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap; 276 uint32_t denum, num, div, ref_pll, dsel; 277 278 switch (ast->config_mode) { 279 case ast_use_dt: 280 /* 281 * If some properties are missing, use reasonable 282 * defaults for AST2400 283 */ 284 if (of_property_read_u32(np, "aspeed,mcr-configuration", 285 &mcr_cfg)) 286 mcr_cfg = 0x00000577; 287 if (of_property_read_u32(np, "aspeed,mcr-scu-mpll", 288 &mcr_scu_mpll)) 289 mcr_scu_mpll = 0x000050C0; 290 if (of_property_read_u32(np, "aspeed,mcr-scu-strap", 291 &mcr_scu_strap)) 292 mcr_scu_strap = 0; 293 break; 294 case ast_use_p2a: 295 ast_write32(ast, 0xf004, 0x1e6e0000); 296 ast_write32(ast, 0xf000, 0x1); 297 mcr_cfg = ast_read32(ast, 0x10004); 298 mcr_scu_mpll = ast_read32(ast, 0x10120); 299 mcr_scu_strap = ast_read32(ast, 0x10170); 300 break; 301 case ast_use_defaults: 302 default: 303 ast->dram_bus_width = 16; 304 ast->dram_type = AST_DRAM_1Gx16; 305 if (ast->chip == AST2500) 306 ast->mclk = 800; 307 else 308 ast->mclk = 396; 309 return 0; 310 } 311 312 if (mcr_cfg & 0x40) 313 ast->dram_bus_width = 16; 314 else 315 ast->dram_bus_width = 32; 316 317 if (ast->chip == AST2500) { 318 switch (mcr_cfg & 0x03) { 319 case 0: 320 ast->dram_type = AST_DRAM_1Gx16; 321 break; 322 default: 323 case 1: 324 ast->dram_type = AST_DRAM_2Gx16; 325 break; 326 case 2: 327 ast->dram_type = AST_DRAM_4Gx16; 328 break; 329 case 3: 330 ast->dram_type = AST_DRAM_8Gx16; 331 break; 332 } 333 } else if (ast->chip == AST2300 || ast->chip == AST2400) { 334 switch (mcr_cfg & 0x03) { 335 case 0: 336 ast->dram_type = AST_DRAM_512Mx16; 337 break; 338 default: 339 case 1: 340 ast->dram_type = AST_DRAM_1Gx16; 341 break; 342 case 2: 343 ast->dram_type = AST_DRAM_2Gx16; 344 break; 345 case 3: 346 ast->dram_type = AST_DRAM_4Gx16; 347 break; 348 } 349 } else { 350 switch (mcr_cfg & 0x0c) { 351 case 0: 352 case 4: 353 ast->dram_type = AST_DRAM_512Mx16; 354 break; 355 case 8: 356 if (mcr_cfg & 0x40) 357 ast->dram_type = AST_DRAM_1Gx16; 358 else 359 ast->dram_type = AST_DRAM_512Mx32; 360 break; 361 case 0xc: 362 ast->dram_type = AST_DRAM_1Gx32; 363 break; 364 } 365 } 366 367 if (mcr_scu_strap & 0x2000) 368 ref_pll = 14318; 369 else 370 ref_pll = 12000; 371 372 denum = mcr_scu_mpll & 0x1f; 373 num = (mcr_scu_mpll & 0x3fe0) >> 5; 374 dsel = (mcr_scu_mpll & 0xc000) >> 14; 375 switch (dsel) { 376 case 3: 377 div = 0x4; 378 break; 379 case 2: 380 case 1: 381 div = 0x2; 382 break; 383 default: 384 div = 0x1; 385 break; 386 } 387 ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000)); 388 return 0; 389 } 390 391 /* 392 * Run this function as part of the HW device cleanup; not 393 * when the DRM device gets released. 394 */ 395 static void ast_device_release(void *data) 396 { 397 struct ast_device *ast = data; 398 399 /* enable standard VGA decode */ 400 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04); 401 } 402 403 struct ast_device *ast_device_create(const struct drm_driver *drv, 404 struct pci_dev *pdev, 405 unsigned long flags) 406 { 407 struct drm_device *dev; 408 struct ast_device *ast; 409 bool need_post; 410 int ret = 0; 411 412 ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_device, base); 413 if (IS_ERR(ast)) 414 return ast; 415 dev = &ast->base; 416 417 pci_set_drvdata(pdev, dev); 418 419 ret = drmm_mutex_init(dev, &ast->ioregs_lock); 420 if (ret) 421 return ERR_PTR(ret); 422 423 ast->regs = pcim_iomap(pdev, 1, 0); 424 if (!ast->regs) 425 return ERR_PTR(-EIO); 426 427 /* 428 * After AST2500, MMIO is enabled by default, and it should be adopted 429 * to be compatible with Arm. 430 */ 431 if (pdev->revision >= 0x40) { 432 ast->ioregs = ast->regs + AST_IO_MM_OFFSET; 433 } else if (!(pci_resource_flags(pdev, 2) & IORESOURCE_IO)) { 434 drm_info(dev, "platform has no IO space, trying MMIO\n"); 435 ast->ioregs = ast->regs + AST_IO_MM_OFFSET; 436 } 437 438 /* "map" IO regs if the above hasn't done so already */ 439 if (!ast->ioregs) { 440 ast->ioregs = pcim_iomap(pdev, 2, 0); 441 if (!ast->ioregs) 442 return ERR_PTR(-EIO); 443 } 444 445 ast_detect_chip(dev, &need_post); 446 447 ret = ast_get_dram_info(dev); 448 if (ret) 449 return ERR_PTR(ret); 450 451 drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n", 452 ast->mclk, ast->dram_type, ast->dram_bus_width); 453 454 if (need_post) 455 ast_post_gpu(dev); 456 457 ret = ast_mm_init(ast); 458 if (ret) 459 return ERR_PTR(ret); 460 461 /* map reserved buffer */ 462 ast->dp501_fw_buf = NULL; 463 if (ast->vram_size < pci_resource_len(pdev, 0)) { 464 ast->dp501_fw_buf = pci_iomap_range(pdev, 0, ast->vram_size, 0); 465 if (!ast->dp501_fw_buf) 466 drm_info(dev, "failed to map reserved buffer!\n"); 467 } 468 469 ret = ast_mode_config_init(ast); 470 if (ret) 471 return ERR_PTR(ret); 472 473 ret = devm_add_action_or_reset(dev->dev, ast_device_release, ast); 474 if (ret) 475 return ERR_PTR(ret); 476 477 return ast; 478 } 479