1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. 4 * 5 * Freescale DIU Frame Buffer device driver 6 * 7 * Authors: Hongjun Chen <hong-jun.chen@freescale.com> 8 * Paul Widmer <paul.widmer@freescale.com> 9 * Srikanth Srinivasan <srikanth.srinivasan@freescale.com> 10 * York Sun <yorksun@freescale.com> 11 * 12 * Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix 13 */ 14 15 #include <linux/module.h> 16 #include <linux/kernel.h> 17 #include <linux/errno.h> 18 #include <linux/string.h> 19 #include <linux/slab.h> 20 #include <linux/fb.h> 21 #include <linux/init.h> 22 #include <linux/dma-mapping.h> 23 #include <linux/platform_device.h> 24 #include <linux/interrupt.h> 25 #include <linux/clk.h> 26 #include <linux/uaccess.h> 27 #include <linux/vmalloc.h> 28 #include <linux/spinlock.h> 29 #include <linux/of_address.h> 30 #include <linux/of_irq.h> 31 32 #include <sysdev/fsl_soc.h> 33 #include <linux/fsl-diu-fb.h> 34 #include "edid.h" 35 36 #define NUM_AOIS 5 /* 1 for plane 0, 2 for planes 1 & 2 each */ 37 38 /* HW cursor parameters */ 39 #define MAX_CURS 32 40 41 /* INT_STATUS/INT_MASK field descriptions */ 42 #define INT_VSYNC 0x01 /* Vsync interrupt */ 43 #define INT_VSYNC_WB 0x02 /* Vsync interrupt for write back operation */ 44 #define INT_UNDRUN 0x04 /* Under run exception interrupt */ 45 #define INT_PARERR 0x08 /* Display parameters error interrupt */ 46 #define INT_LS_BF_VS 0x10 /* Lines before vsync. interrupt */ 47 48 /* 49 * List of supported video modes 50 * 51 * The first entry is the default video mode. The remain entries are in 52 * order if increasing resolution and frequency. The 320x240-60 mode is 53 * the initial AOI for the second and third planes. 54 */ 55 static struct fb_videomode fsl_diu_mode_db[] = { 56 { 57 .refresh = 60, 58 .xres = 1024, 59 .yres = 768, 60 .pixclock = 15385, 61 .left_margin = 160, 62 .right_margin = 24, 63 .upper_margin = 29, 64 .lower_margin = 3, 65 .hsync_len = 136, 66 .vsync_len = 6, 67 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 68 .vmode = FB_VMODE_NONINTERLACED 69 }, 70 { 71 .refresh = 60, 72 .xres = 320, 73 .yres = 240, 74 .pixclock = 79440, 75 .left_margin = 16, 76 .right_margin = 16, 77 .upper_margin = 16, 78 .lower_margin = 5, 79 .hsync_len = 48, 80 .vsync_len = 1, 81 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 82 .vmode = FB_VMODE_NONINTERLACED 83 }, 84 { 85 .refresh = 60, 86 .xres = 640, 87 .yres = 480, 88 .pixclock = 39722, 89 .left_margin = 48, 90 .right_margin = 16, 91 .upper_margin = 33, 92 .lower_margin = 10, 93 .hsync_len = 96, 94 .vsync_len = 2, 95 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 96 .vmode = FB_VMODE_NONINTERLACED 97 }, 98 { 99 .refresh = 72, 100 .xres = 640, 101 .yres = 480, 102 .pixclock = 32052, 103 .left_margin = 128, 104 .right_margin = 24, 105 .upper_margin = 28, 106 .lower_margin = 9, 107 .hsync_len = 40, 108 .vsync_len = 3, 109 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 110 .vmode = FB_VMODE_NONINTERLACED 111 }, 112 { 113 .refresh = 75, 114 .xres = 640, 115 .yres = 480, 116 .pixclock = 31747, 117 .left_margin = 120, 118 .right_margin = 16, 119 .upper_margin = 16, 120 .lower_margin = 1, 121 .hsync_len = 64, 122 .vsync_len = 3, 123 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 124 .vmode = FB_VMODE_NONINTERLACED 125 }, 126 { 127 .refresh = 90, 128 .xres = 640, 129 .yres = 480, 130 .pixclock = 25057, 131 .left_margin = 120, 132 .right_margin = 32, 133 .upper_margin = 14, 134 .lower_margin = 25, 135 .hsync_len = 40, 136 .vsync_len = 14, 137 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 138 .vmode = FB_VMODE_NONINTERLACED 139 }, 140 { 141 .refresh = 100, 142 .xres = 640, 143 .yres = 480, 144 .pixclock = 22272, 145 .left_margin = 48, 146 .right_margin = 32, 147 .upper_margin = 17, 148 .lower_margin = 22, 149 .hsync_len = 128, 150 .vsync_len = 12, 151 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 152 .vmode = FB_VMODE_NONINTERLACED 153 }, 154 { 155 .refresh = 60, 156 .xres = 800, 157 .yres = 480, 158 .pixclock = 33805, 159 .left_margin = 96, 160 .right_margin = 24, 161 .upper_margin = 10, 162 .lower_margin = 3, 163 .hsync_len = 72, 164 .vsync_len = 7, 165 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 166 .vmode = FB_VMODE_NONINTERLACED 167 }, 168 { 169 .refresh = 60, 170 .xres = 800, 171 .yres = 600, 172 .pixclock = 25000, 173 .left_margin = 88, 174 .right_margin = 40, 175 .upper_margin = 23, 176 .lower_margin = 1, 177 .hsync_len = 128, 178 .vsync_len = 4, 179 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 180 .vmode = FB_VMODE_NONINTERLACED 181 }, 182 { 183 .refresh = 60, 184 .xres = 854, 185 .yres = 480, 186 .pixclock = 31518, 187 .left_margin = 104, 188 .right_margin = 16, 189 .upper_margin = 13, 190 .lower_margin = 1, 191 .hsync_len = 88, 192 .vsync_len = 3, 193 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 194 .vmode = FB_VMODE_NONINTERLACED 195 }, 196 { 197 .refresh = 70, 198 .xres = 1024, 199 .yres = 768, 200 .pixclock = 16886, 201 .left_margin = 3, 202 .right_margin = 3, 203 .upper_margin = 2, 204 .lower_margin = 2, 205 .hsync_len = 40, 206 .vsync_len = 18, 207 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 208 .vmode = FB_VMODE_NONINTERLACED 209 }, 210 { 211 .refresh = 75, 212 .xres = 1024, 213 .yres = 768, 214 .pixclock = 15009, 215 .left_margin = 3, 216 .right_margin = 3, 217 .upper_margin = 2, 218 .lower_margin = 2, 219 .hsync_len = 80, 220 .vsync_len = 32, 221 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 222 .vmode = FB_VMODE_NONINTERLACED 223 }, 224 { 225 .refresh = 60, 226 .xres = 1280, 227 .yres = 480, 228 .pixclock = 18939, 229 .left_margin = 353, 230 .right_margin = 47, 231 .upper_margin = 39, 232 .lower_margin = 4, 233 .hsync_len = 8, 234 .vsync_len = 2, 235 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 236 .vmode = FB_VMODE_NONINTERLACED 237 }, 238 { 239 .refresh = 60, 240 .xres = 1280, 241 .yres = 720, 242 .pixclock = 13426, 243 .left_margin = 192, 244 .right_margin = 64, 245 .upper_margin = 22, 246 .lower_margin = 1, 247 .hsync_len = 136, 248 .vsync_len = 3, 249 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 250 .vmode = FB_VMODE_NONINTERLACED 251 }, 252 { 253 .refresh = 60, 254 .xres = 1280, 255 .yres = 1024, 256 .pixclock = 9375, 257 .left_margin = 38, 258 .right_margin = 128, 259 .upper_margin = 2, 260 .lower_margin = 7, 261 .hsync_len = 216, 262 .vsync_len = 37, 263 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 264 .vmode = FB_VMODE_NONINTERLACED 265 }, 266 { 267 .refresh = 70, 268 .xres = 1280, 269 .yres = 1024, 270 .pixclock = 9380, 271 .left_margin = 6, 272 .right_margin = 6, 273 .upper_margin = 4, 274 .lower_margin = 4, 275 .hsync_len = 60, 276 .vsync_len = 94, 277 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 278 .vmode = FB_VMODE_NONINTERLACED 279 }, 280 { 281 .refresh = 75, 282 .xres = 1280, 283 .yres = 1024, 284 .pixclock = 9380, 285 .left_margin = 6, 286 .right_margin = 6, 287 .upper_margin = 4, 288 .lower_margin = 4, 289 .hsync_len = 60, 290 .vsync_len = 15, 291 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 292 .vmode = FB_VMODE_NONINTERLACED 293 }, 294 { 295 .refresh = 60, 296 .xres = 1920, 297 .yres = 1080, 298 .pixclock = 5787, 299 .left_margin = 328, 300 .right_margin = 120, 301 .upper_margin = 34, 302 .lower_margin = 1, 303 .hsync_len = 208, 304 .vsync_len = 3, 305 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 306 .vmode = FB_VMODE_NONINTERLACED 307 }, 308 }; 309 310 static char *fb_mode; 311 static unsigned long default_bpp = 32; 312 static enum fsl_diu_monitor_port monitor_port; 313 static char *monitor_string; 314 315 #if defined(CONFIG_NOT_COHERENT_CACHE) 316 static u8 *coherence_data; 317 static size_t coherence_data_size; 318 static unsigned int d_cache_line_size; 319 #endif 320 321 static DEFINE_SPINLOCK(diu_lock); 322 323 enum mfb_index { 324 PLANE0 = 0, /* Plane 0, only one AOI that fills the screen */ 325 PLANE1_AOI0, /* Plane 1, first AOI */ 326 PLANE1_AOI1, /* Plane 1, second AOI */ 327 PLANE2_AOI0, /* Plane 2, first AOI */ 328 PLANE2_AOI1, /* Plane 2, second AOI */ 329 }; 330 331 struct mfb_info { 332 enum mfb_index index; 333 char *id; 334 int registered; 335 unsigned long pseudo_palette[16]; 336 struct diu_ad *ad; 337 unsigned char g_alpha; 338 unsigned int count; 339 int x_aoi_d; /* aoi display x offset to physical screen */ 340 int y_aoi_d; /* aoi display y offset to physical screen */ 341 struct fsl_diu_data *parent; 342 }; 343 344 /** 345 * struct fsl_diu_data - per-DIU data structure 346 * @dma_addr: DMA address of this structure 347 * @fsl_diu_info: fb_info objects, one per AOI 348 * @dev_attr: sysfs structure 349 * @irq: IRQ 350 * @monitor_port: the monitor port this DIU is connected to 351 * @diu_reg: pointer to the DIU hardware registers 352 * @reg_lock: spinlock for register access 353 * @dummy_aoi: video buffer for the 4x4 32-bit dummy AOI 354 * dummy_ad: DIU Area Descriptor for the dummy AOI 355 * @ad[]: Area Descriptors for each real AOI 356 * @gamma: gamma color table 357 * @cursor: hardware cursor data 358 * @blank_cursor: blank cursor for hiding cursor 359 * @next_cursor: scratch space to build load cursor 360 * @edid_data: EDID information buffer 361 * @has_edid: whether or not the EDID buffer is valid 362 * 363 * This data structure must be allocated with 32-byte alignment, so that the 364 * internal fields can be aligned properly. 365 */ 366 struct fsl_diu_data { 367 dma_addr_t dma_addr; 368 struct fb_info fsl_diu_info[NUM_AOIS]; 369 struct mfb_info mfb[NUM_AOIS]; 370 struct device_attribute dev_attr; 371 unsigned int irq; 372 enum fsl_diu_monitor_port monitor_port; 373 struct diu __iomem *diu_reg; 374 spinlock_t reg_lock; 375 u8 dummy_aoi[4 * 4 * 4]; 376 struct diu_ad dummy_ad __aligned(8); 377 struct diu_ad ad[NUM_AOIS] __aligned(8); 378 u8 gamma[256 * 3] __aligned(32); 379 /* It's easier to parse the cursor data as little-endian */ 380 __le16 cursor[MAX_CURS * MAX_CURS] __aligned(32); 381 /* Blank cursor data -- used to hide the cursor */ 382 __le16 blank_cursor[MAX_CURS * MAX_CURS] __aligned(32); 383 /* Scratch cursor data -- used to build new cursor */ 384 __le16 next_cursor[MAX_CURS * MAX_CURS] __aligned(32); 385 uint8_t edid_data[EDID_LENGTH]; 386 bool has_edid; 387 } __aligned(32); 388 389 /* Determine the DMA address of a member of the fsl_diu_data structure */ 390 #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f)) 391 392 static const struct mfb_info mfb_template[] = { 393 { 394 .index = PLANE0, 395 .id = "Panel0", 396 .registered = 0, 397 .count = 0, 398 .x_aoi_d = 0, 399 .y_aoi_d = 0, 400 }, 401 { 402 .index = PLANE1_AOI0, 403 .id = "Panel1 AOI0", 404 .registered = 0, 405 .g_alpha = 0xff, 406 .count = 0, 407 .x_aoi_d = 0, 408 .y_aoi_d = 0, 409 }, 410 { 411 .index = PLANE1_AOI1, 412 .id = "Panel1 AOI1", 413 .registered = 0, 414 .g_alpha = 0xff, 415 .count = 0, 416 .x_aoi_d = 0, 417 .y_aoi_d = 480, 418 }, 419 { 420 .index = PLANE2_AOI0, 421 .id = "Panel2 AOI0", 422 .registered = 0, 423 .g_alpha = 0xff, 424 .count = 0, 425 .x_aoi_d = 640, 426 .y_aoi_d = 0, 427 }, 428 { 429 .index = PLANE2_AOI1, 430 .id = "Panel2 AOI1", 431 .registered = 0, 432 .g_alpha = 0xff, 433 .count = 0, 434 .x_aoi_d = 640, 435 .y_aoi_d = 480, 436 }, 437 }; 438 439 #ifdef DEBUG fsl_diu_dump(struct diu __iomem * hw)440 static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw) 441 { 442 mb(); 443 pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x palette=%08x " 444 "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x " 445 "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x " 446 "thresholds=%08x int_mask=%08x plut=%08x\n", 447 hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma, 448 hw->palette, hw->cursor, hw->curs_pos, hw->diu_mode, 449 hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para, 450 hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut); 451 rmb(); 452 } 453 #endif 454 455 /** 456 * fsl_diu_name_to_port - convert a port name to a monitor port enum 457 * 458 * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns 459 * the enum fsl_diu_monitor_port that corresponds to that string. 460 * 461 * For compatibility with older versions, a number ("0", "1", or "2") is also 462 * supported. 463 * 464 * If the string is unknown, DVI is assumed. 465 * 466 * If the particular port is not supported by the platform, another port 467 * (platform-specific) is chosen instead. 468 */ fsl_diu_name_to_port(const char * s)469 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s) 470 { 471 enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI; 472 unsigned long val; 473 474 if (s) { 475 if (!kstrtoul(s, 10, &val) && (val <= 2)) 476 port = (enum fsl_diu_monitor_port) val; 477 else if (strncmp(s, "lvds", 4) == 0) 478 port = FSL_DIU_PORT_LVDS; 479 else if (strncmp(s, "dlvds", 5) == 0) 480 port = FSL_DIU_PORT_DLVDS; 481 } 482 483 if (diu_ops.valid_monitor_port) 484 port = diu_ops.valid_monitor_port(port); 485 486 return port; 487 } 488 489 /* 490 * Workaround for failed writing desc register of planes. 491 * Needed with MPC5121 DIU rev 2.0 silicon. 492 */ wr_reg_wa(u32 * reg,u32 val)493 static void wr_reg_wa(u32 *reg, u32 val) 494 { 495 do { 496 out_be32(reg, val); 497 } while (in_be32(reg) != val); 498 } 499 fsl_diu_enable_panel(struct fb_info * info)500 static void fsl_diu_enable_panel(struct fb_info *info) 501 { 502 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par; 503 struct diu_ad *ad = mfbi->ad; 504 struct fsl_diu_data *data = mfbi->parent; 505 struct diu __iomem *hw = data->diu_reg; 506 507 switch (mfbi->index) { 508 case PLANE0: 509 wr_reg_wa(&hw->desc[0], ad->paddr); 510 break; 511 case PLANE1_AOI0: 512 cmfbi = &data->mfb[2]; 513 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */ 514 if (cmfbi->count > 0) /* AOI1 open */ 515 ad->next_ad = 516 cpu_to_le32(cmfbi->ad->paddr); 517 else 518 ad->next_ad = 0; 519 wr_reg_wa(&hw->desc[1], ad->paddr); 520 } 521 break; 522 case PLANE2_AOI0: 523 cmfbi = &data->mfb[4]; 524 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */ 525 if (cmfbi->count > 0) /* AOI1 open */ 526 ad->next_ad = 527 cpu_to_le32(cmfbi->ad->paddr); 528 else 529 ad->next_ad = 0; 530 wr_reg_wa(&hw->desc[2], ad->paddr); 531 } 532 break; 533 case PLANE1_AOI1: 534 pmfbi = &data->mfb[1]; 535 ad->next_ad = 0; 536 if (hw->desc[1] == data->dummy_ad.paddr) 537 wr_reg_wa(&hw->desc[1], ad->paddr); 538 else /* AOI0 open */ 539 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr); 540 break; 541 case PLANE2_AOI1: 542 pmfbi = &data->mfb[3]; 543 ad->next_ad = 0; 544 if (hw->desc[2] == data->dummy_ad.paddr) 545 wr_reg_wa(&hw->desc[2], ad->paddr); 546 else /* AOI0 was open */ 547 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr); 548 break; 549 } 550 } 551 fsl_diu_disable_panel(struct fb_info * info)552 static void fsl_diu_disable_panel(struct fb_info *info) 553 { 554 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par; 555 struct diu_ad *ad = mfbi->ad; 556 struct fsl_diu_data *data = mfbi->parent; 557 struct diu __iomem *hw = data->diu_reg; 558 559 switch (mfbi->index) { 560 case PLANE0: 561 wr_reg_wa(&hw->desc[0], 0); 562 break; 563 case PLANE1_AOI0: 564 cmfbi = &data->mfb[2]; 565 if (cmfbi->count > 0) /* AOI1 is open */ 566 wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr); 567 /* move AOI1 to the first */ 568 else /* AOI1 was closed */ 569 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr); 570 /* close AOI 0 */ 571 break; 572 case PLANE2_AOI0: 573 cmfbi = &data->mfb[4]; 574 if (cmfbi->count > 0) /* AOI1 is open */ 575 wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr); 576 /* move AOI1 to the first */ 577 else /* AOI1 was closed */ 578 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr); 579 /* close AOI 0 */ 580 break; 581 case PLANE1_AOI1: 582 pmfbi = &data->mfb[1]; 583 if (hw->desc[1] != ad->paddr) { 584 /* AOI1 is not the first in the chain */ 585 if (pmfbi->count > 0) 586 /* AOI0 is open, must be the first */ 587 pmfbi->ad->next_ad = 0; 588 } else /* AOI1 is the first in the chain */ 589 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr); 590 /* close AOI 1 */ 591 break; 592 case PLANE2_AOI1: 593 pmfbi = &data->mfb[3]; 594 if (hw->desc[2] != ad->paddr) { 595 /* AOI1 is not the first in the chain */ 596 if (pmfbi->count > 0) 597 /* AOI0 is open, must be the first */ 598 pmfbi->ad->next_ad = 0; 599 } else /* AOI1 is the first in the chain */ 600 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr); 601 /* close AOI 1 */ 602 break; 603 } 604 } 605 enable_lcdc(struct fb_info * info)606 static void enable_lcdc(struct fb_info *info) 607 { 608 struct mfb_info *mfbi = info->par; 609 struct fsl_diu_data *data = mfbi->parent; 610 struct diu __iomem *hw = data->diu_reg; 611 612 out_be32(&hw->diu_mode, MFB_MODE1); 613 } 614 disable_lcdc(struct fb_info * info)615 static void disable_lcdc(struct fb_info *info) 616 { 617 struct mfb_info *mfbi = info->par; 618 struct fsl_diu_data *data = mfbi->parent; 619 struct diu __iomem *hw = data->diu_reg; 620 621 out_be32(&hw->diu_mode, 0); 622 } 623 adjust_aoi_size_position(struct fb_var_screeninfo * var,struct fb_info * info)624 static void adjust_aoi_size_position(struct fb_var_screeninfo *var, 625 struct fb_info *info) 626 { 627 struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par; 628 struct fsl_diu_data *data = mfbi->parent; 629 int available_height, upper_aoi_bottom; 630 enum mfb_index index = mfbi->index; 631 int lower_aoi_is_open, upper_aoi_is_open; 632 __u32 base_plane_width, base_plane_height, upper_aoi_height; 633 634 base_plane_width = data->fsl_diu_info[0].var.xres; 635 base_plane_height = data->fsl_diu_info[0].var.yres; 636 637 if (mfbi->x_aoi_d < 0) 638 mfbi->x_aoi_d = 0; 639 if (mfbi->y_aoi_d < 0) 640 mfbi->y_aoi_d = 0; 641 switch (index) { 642 case PLANE0: 643 if (mfbi->x_aoi_d != 0) 644 mfbi->x_aoi_d = 0; 645 if (mfbi->y_aoi_d != 0) 646 mfbi->y_aoi_d = 0; 647 break; 648 case PLANE1_AOI0: 649 case PLANE2_AOI0: 650 lower_aoi_mfbi = data->fsl_diu_info[index+1].par; 651 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0; 652 if (var->xres > base_plane_width) 653 var->xres = base_plane_width; 654 if ((mfbi->x_aoi_d + var->xres) > base_plane_width) 655 mfbi->x_aoi_d = base_plane_width - var->xres; 656 657 if (lower_aoi_is_open) 658 available_height = lower_aoi_mfbi->y_aoi_d; 659 else 660 available_height = base_plane_height; 661 if (var->yres > available_height) 662 var->yres = available_height; 663 if ((mfbi->y_aoi_d + var->yres) > available_height) 664 mfbi->y_aoi_d = available_height - var->yres; 665 break; 666 case PLANE1_AOI1: 667 case PLANE2_AOI1: 668 upper_aoi_mfbi = data->fsl_diu_info[index-1].par; 669 upper_aoi_height = data->fsl_diu_info[index-1].var.yres; 670 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height; 671 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0; 672 if (var->xres > base_plane_width) 673 var->xres = base_plane_width; 674 if ((mfbi->x_aoi_d + var->xres) > base_plane_width) 675 mfbi->x_aoi_d = base_plane_width - var->xres; 676 if (mfbi->y_aoi_d < 0) 677 mfbi->y_aoi_d = 0; 678 if (upper_aoi_is_open) { 679 if (mfbi->y_aoi_d < upper_aoi_bottom) 680 mfbi->y_aoi_d = upper_aoi_bottom; 681 available_height = base_plane_height 682 - upper_aoi_bottom; 683 } else 684 available_height = base_plane_height; 685 if (var->yres > available_height) 686 var->yres = available_height; 687 if ((mfbi->y_aoi_d + var->yres) > base_plane_height) 688 mfbi->y_aoi_d = base_plane_height - var->yres; 689 break; 690 } 691 } 692 /* 693 * Checks to see if the hardware supports the state requested by var passed 694 * in. This function does not alter the hardware state! If the var passed in 695 * is slightly off by what the hardware can support then we alter the var 696 * PASSED in to what we can do. If the hardware doesn't support mode change 697 * a -EINVAL will be returned by the upper layers. 698 */ fsl_diu_check_var(struct fb_var_screeninfo * var,struct fb_info * info)699 static int fsl_diu_check_var(struct fb_var_screeninfo *var, 700 struct fb_info *info) 701 { 702 if (var->xres_virtual < var->xres) 703 var->xres_virtual = var->xres; 704 if (var->yres_virtual < var->yres) 705 var->yres_virtual = var->yres; 706 707 if (var->xoffset + info->var.xres > info->var.xres_virtual) 708 var->xoffset = info->var.xres_virtual - info->var.xres; 709 710 if (var->yoffset + info->var.yres > info->var.yres_virtual) 711 var->yoffset = info->var.yres_virtual - info->var.yres; 712 713 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) && 714 (var->bits_per_pixel != 16)) 715 var->bits_per_pixel = default_bpp; 716 717 switch (var->bits_per_pixel) { 718 case 16: 719 var->red.length = 5; 720 var->red.offset = 11; 721 var->red.msb_right = 0; 722 723 var->green.length = 6; 724 var->green.offset = 5; 725 var->green.msb_right = 0; 726 727 var->blue.length = 5; 728 var->blue.offset = 0; 729 var->blue.msb_right = 0; 730 731 var->transp.length = 0; 732 var->transp.offset = 0; 733 var->transp.msb_right = 0; 734 break; 735 case 24: 736 var->red.length = 8; 737 var->red.offset = 0; 738 var->red.msb_right = 0; 739 740 var->green.length = 8; 741 var->green.offset = 8; 742 var->green.msb_right = 0; 743 744 var->blue.length = 8; 745 var->blue.offset = 16; 746 var->blue.msb_right = 0; 747 748 var->transp.length = 0; 749 var->transp.offset = 0; 750 var->transp.msb_right = 0; 751 break; 752 case 32: 753 var->red.length = 8; 754 var->red.offset = 16; 755 var->red.msb_right = 0; 756 757 var->green.length = 8; 758 var->green.offset = 8; 759 var->green.msb_right = 0; 760 761 var->blue.length = 8; 762 var->blue.offset = 0; 763 var->blue.msb_right = 0; 764 765 var->transp.length = 8; 766 var->transp.offset = 24; 767 var->transp.msb_right = 0; 768 769 break; 770 } 771 772 var->height = -1; 773 var->width = -1; 774 var->grayscale = 0; 775 776 /* Copy nonstd field to/from sync for fbset usage */ 777 var->sync |= var->nonstd; 778 var->nonstd |= var->sync; 779 780 adjust_aoi_size_position(var, info); 781 return 0; 782 } 783 set_fix(struct fb_info * info)784 static void set_fix(struct fb_info *info) 785 { 786 struct fb_fix_screeninfo *fix = &info->fix; 787 struct fb_var_screeninfo *var = &info->var; 788 struct mfb_info *mfbi = info->par; 789 790 strncpy(fix->id, mfbi->id, sizeof(fix->id)); 791 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8; 792 fix->type = FB_TYPE_PACKED_PIXELS; 793 fix->accel = FB_ACCEL_NONE; 794 fix->visual = FB_VISUAL_TRUECOLOR; 795 fix->xpanstep = 1; 796 fix->ypanstep = 1; 797 } 798 update_lcdc(struct fb_info * info)799 static void update_lcdc(struct fb_info *info) 800 { 801 struct fb_var_screeninfo *var = &info->var; 802 struct mfb_info *mfbi = info->par; 803 struct fsl_diu_data *data = mfbi->parent; 804 struct diu __iomem *hw; 805 int i, j; 806 u8 *gamma_table_base; 807 808 u32 temp; 809 810 hw = data->diu_reg; 811 812 if (diu_ops.set_monitor_port) 813 diu_ops.set_monitor_port(data->monitor_port); 814 gamma_table_base = data->gamma; 815 816 /* Prep for DIU init - gamma table, cursor table */ 817 818 for (i = 0; i <= 2; i++) 819 for (j = 0; j <= 255; j++) 820 *gamma_table_base++ = j; 821 822 if (diu_ops.set_gamma_table) 823 diu_ops.set_gamma_table(data->monitor_port, data->gamma); 824 825 disable_lcdc(info); 826 827 /* Program DIU registers */ 828 829 out_be32(&hw->gamma, DMA_ADDR(data, gamma)); 830 831 out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */ 832 out_be32(&hw->disp_size, (var->yres << 16) | var->xres); 833 834 /* Horizontal and vertical configuration register */ 835 temp = var->left_margin << 22 | /* BP_H */ 836 var->hsync_len << 11 | /* PW_H */ 837 var->right_margin; /* FP_H */ 838 839 out_be32(&hw->hsyn_para, temp); 840 841 temp = var->upper_margin << 22 | /* BP_V */ 842 var->vsync_len << 11 | /* PW_V */ 843 var->lower_margin; /* FP_V */ 844 845 out_be32(&hw->vsyn_para, temp); 846 847 diu_ops.set_pixel_clock(var->pixclock); 848 849 #ifndef CONFIG_PPC_MPC512x 850 /* 851 * The PLUT register is defined differently on the MPC5121 than it 852 * is on other SOCs. Unfortunately, there's no documentation that 853 * explains how it's supposed to be programmed, so for now, we leave 854 * it at the default value on the MPC5121. 855 * 856 * For other SOCs, program it for the highest priority, which will 857 * reduce the chance of underrun. Technically, we should scale the 858 * priority to match the screen resolution, but doing that properly 859 * requires delicate fine-tuning for each use-case. 860 */ 861 out_be32(&hw->plut, 0x01F5F666); 862 #endif 863 864 /* Enable the DIU */ 865 enable_lcdc(info); 866 } 867 map_video_memory(struct fb_info * info)868 static int map_video_memory(struct fb_info *info) 869 { 870 u32 smem_len = info->fix.line_length * info->var.yres_virtual; 871 void *p; 872 873 p = alloc_pages_exact(smem_len, GFP_DMA | __GFP_ZERO); 874 if (!p) { 875 fb_err(info, "unable to allocate fb memory\n"); 876 return -ENOMEM; 877 } 878 mutex_lock(&info->mm_lock); 879 info->screen_base = p; 880 info->fix.smem_start = virt_to_phys(info->screen_base); 881 info->fix.smem_len = smem_len; 882 mutex_unlock(&info->mm_lock); 883 info->screen_size = info->fix.smem_len; 884 885 return 0; 886 } 887 unmap_video_memory(struct fb_info * info)888 static void unmap_video_memory(struct fb_info *info) 889 { 890 void *p = info->screen_base; 891 size_t l = info->fix.smem_len; 892 893 mutex_lock(&info->mm_lock); 894 info->screen_base = NULL; 895 info->fix.smem_start = 0; 896 info->fix.smem_len = 0; 897 mutex_unlock(&info->mm_lock); 898 899 if (p) 900 free_pages_exact(p, l); 901 } 902 903 /* 904 * Using the fb_var_screeninfo in fb_info we set the aoi of this 905 * particular framebuffer. It is a light version of fsl_diu_set_par. 906 */ fsl_diu_set_aoi(struct fb_info * info)907 static int fsl_diu_set_aoi(struct fb_info *info) 908 { 909 struct fb_var_screeninfo *var = &info->var; 910 struct mfb_info *mfbi = info->par; 911 struct diu_ad *ad = mfbi->ad; 912 913 /* AOI should not be greater than display size */ 914 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset); 915 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d); 916 return 0; 917 } 918 919 /** 920 * fsl_diu_get_pixel_format: return the pixel format for a given color depth 921 * 922 * The pixel format is a 32-bit value that determine which bits in each 923 * pixel are to be used for each color. This is the default function used 924 * if the platform does not define its own version. 925 */ fsl_diu_get_pixel_format(unsigned int bits_per_pixel)926 static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel) 927 { 928 #define PF_BYTE_F 0x10000000 929 #define PF_ALPHA_C_MASK 0x0E000000 930 #define PF_ALPHA_C_SHIFT 25 931 #define PF_BLUE_C_MASK 0x01800000 932 #define PF_BLUE_C_SHIFT 23 933 #define PF_GREEN_C_MASK 0x00600000 934 #define PF_GREEN_C_SHIFT 21 935 #define PF_RED_C_MASK 0x00180000 936 #define PF_RED_C_SHIFT 19 937 #define PF_PALETTE 0x00040000 938 #define PF_PIXEL_S_MASK 0x00030000 939 #define PF_PIXEL_S_SHIFT 16 940 #define PF_COMP_3_MASK 0x0000F000 941 #define PF_COMP_3_SHIFT 12 942 #define PF_COMP_2_MASK 0x00000F00 943 #define PF_COMP_2_SHIFT 8 944 #define PF_COMP_1_MASK 0x000000F0 945 #define PF_COMP_1_SHIFT 4 946 #define PF_COMP_0_MASK 0x0000000F 947 #define PF_COMP_0_SHIFT 0 948 949 #define MAKE_PF(alpha, red, green, blue, size, c0, c1, c2, c3) \ 950 cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \ 951 (blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \ 952 (red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \ 953 (c2 << PF_COMP_2_SHIFT) | (c1 << PF_COMP_1_SHIFT) | \ 954 (c0 << PF_COMP_0_SHIFT) | (size << PF_PIXEL_S_SHIFT)) 955 956 switch (bits_per_pixel) { 957 case 32: 958 /* 0x88883316 */ 959 return MAKE_PF(3, 2, 1, 0, 3, 8, 8, 8, 8); 960 case 24: 961 /* 0x88082219 */ 962 return MAKE_PF(4, 0, 1, 2, 2, 8, 8, 8, 0); 963 case 16: 964 /* 0x65053118 */ 965 return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0); 966 default: 967 pr_err("fsl-diu: unsupported color depth %u\n", bits_per_pixel); 968 return 0; 969 } 970 } 971 972 /* 973 * Copies a cursor image from user space to the proper place in driver 974 * memory so that the hardware can display the cursor image. 975 * 976 * Cursor data is represented as a sequence of 'width' bits packed into bytes. 977 * That is, the first 8 bits are in the first byte, the second 8 bits in the 978 * second byte, and so on. Therefore, the each row of the cursor is (width + 979 * 7) / 8 bytes of 'data' 980 * 981 * The DIU only supports cursors up to 32x32 (MAX_CURS). We reject cursors 982 * larger than this, so we already know that 'width' <= 32. Therefore, we can 983 * simplify our code by using a 32-bit big-endian integer ("line") to read in 984 * a single line of pixels, and only look at the top 'width' bits of that 985 * integer. 986 * 987 * This could result in an unaligned 32-bit read. For example, if the cursor 988 * is 24x24, then the first three bytes of 'image' contain the pixel data for 989 * the top line of the cursor. We do a 32-bit read of 'image', but we look 990 * only at the top 24 bits. Then we increment 'image' by 3 bytes. The next 991 * read is unaligned. The only problem is that we might read past the end of 992 * 'image' by 1-3 bytes, but that should not cause any problems. 993 */ fsl_diu_load_cursor_image(struct fb_info * info,const void * image,uint16_t bg,uint16_t fg,unsigned int width,unsigned int height)994 static void fsl_diu_load_cursor_image(struct fb_info *info, 995 const void *image, uint16_t bg, uint16_t fg, 996 unsigned int width, unsigned int height) 997 { 998 struct mfb_info *mfbi = info->par; 999 struct fsl_diu_data *data = mfbi->parent; 1000 __le16 *cursor = data->cursor; 1001 __le16 _fg = cpu_to_le16(fg); 1002 __le16 _bg = cpu_to_le16(bg); 1003 unsigned int h, w; 1004 1005 for (h = 0; h < height; h++) { 1006 uint32_t mask = 1 << 31; 1007 uint32_t line = be32_to_cpup(image); 1008 1009 for (w = 0; w < width; w++) { 1010 cursor[w] = (line & mask) ? _fg : _bg; 1011 mask >>= 1; 1012 } 1013 1014 cursor += MAX_CURS; 1015 image += DIV_ROUND_UP(width, 8); 1016 } 1017 } 1018 1019 /* 1020 * Set a hardware cursor. The image data for the cursor is passed via the 1021 * fb_cursor object. 1022 */ fsl_diu_cursor(struct fb_info * info,struct fb_cursor * cursor)1023 static int fsl_diu_cursor(struct fb_info *info, struct fb_cursor *cursor) 1024 { 1025 struct mfb_info *mfbi = info->par; 1026 struct fsl_diu_data *data = mfbi->parent; 1027 struct diu __iomem *hw = data->diu_reg; 1028 1029 if (cursor->image.width > MAX_CURS || cursor->image.height > MAX_CURS) 1030 return -EINVAL; 1031 1032 /* The cursor size has changed */ 1033 if (cursor->set & FB_CUR_SETSIZE) { 1034 /* 1035 * The DIU cursor is a fixed size, so when we get this 1036 * message, instead of resizing the cursor, we just clear 1037 * all the image data, in expectation of new data. However, 1038 * in tests this control does not appear to be normally 1039 * called. 1040 */ 1041 memset(data->cursor, 0, sizeof(data->cursor)); 1042 } 1043 1044 /* The cursor position has changed (cursor->image.dx|dy) */ 1045 if (cursor->set & FB_CUR_SETPOS) { 1046 uint32_t xx, yy; 1047 1048 yy = (cursor->image.dy - info->var.yoffset) & 0x7ff; 1049 xx = (cursor->image.dx - info->var.xoffset) & 0x7ff; 1050 1051 out_be32(&hw->curs_pos, yy << 16 | xx); 1052 } 1053 1054 /* 1055 * FB_CUR_SETIMAGE - the cursor image has changed 1056 * FB_CUR_SETCMAP - the cursor colors has changed 1057 * FB_CUR_SETSHAPE - the cursor bitmask has changed 1058 */ 1059 if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP | FB_CUR_SETIMAGE)) { 1060 /* 1061 * Determine the size of the cursor image data. Normally, 1062 * it's 8x16. 1063 */ 1064 unsigned int image_size = 1065 DIV_ROUND_UP(cursor->image.width, 8) * 1066 cursor->image.height; 1067 unsigned int image_words = 1068 DIV_ROUND_UP(image_size, sizeof(uint32_t)); 1069 unsigned int bg_idx = cursor->image.bg_color; 1070 unsigned int fg_idx = cursor->image.fg_color; 1071 uint32_t *image, *source, *mask; 1072 uint16_t fg, bg; 1073 unsigned int i; 1074 1075 if (info->state != FBINFO_STATE_RUNNING) 1076 return 0; 1077 1078 bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) | 1079 ((info->cmap.green[bg_idx] & 0xf8) << 2) | 1080 ((info->cmap.blue[bg_idx] & 0xf8) >> 3) | 1081 1 << 15; 1082 1083 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) | 1084 ((info->cmap.green[fg_idx] & 0xf8) << 2) | 1085 ((info->cmap.blue[fg_idx] & 0xf8) >> 3) | 1086 1 << 15; 1087 1088 /* Use 32-bit operations on the data to improve performance */ 1089 image = (uint32_t *)data->next_cursor; 1090 source = (uint32_t *)cursor->image.data; 1091 mask = (uint32_t *)cursor->mask; 1092 1093 if (cursor->rop == ROP_XOR) 1094 for (i = 0; i < image_words; i++) 1095 image[i] = source[i] ^ mask[i]; 1096 else 1097 for (i = 0; i < image_words; i++) 1098 image[i] = source[i] & mask[i]; 1099 1100 fsl_diu_load_cursor_image(info, image, bg, fg, 1101 cursor->image.width, cursor->image.height); 1102 } 1103 1104 /* 1105 * Show or hide the cursor. The cursor data is always stored in the 1106 * 'cursor' memory block, and the actual cursor position is always in 1107 * the DIU's CURS_POS register. To hide the cursor, we redirect the 1108 * CURSOR register to a blank cursor. The show the cursor, we 1109 * redirect the CURSOR register to the real cursor data. 1110 */ 1111 if (cursor->enable) 1112 out_be32(&hw->cursor, DMA_ADDR(data, cursor)); 1113 else 1114 out_be32(&hw->cursor, DMA_ADDR(data, blank_cursor)); 1115 1116 return 0; 1117 } 1118 1119 /* 1120 * Using the fb_var_screeninfo in fb_info we set the resolution of this 1121 * particular framebuffer. This function alters the fb_fix_screeninfo stored 1122 * in fb_info. It does not alter var in fb_info since we are using that 1123 * data. This means we depend on the data in var inside fb_info to be 1124 * supported by the hardware. fsl_diu_check_var is always called before 1125 * fsl_diu_set_par to ensure this. 1126 */ fsl_diu_set_par(struct fb_info * info)1127 static int fsl_diu_set_par(struct fb_info *info) 1128 { 1129 unsigned long len; 1130 struct fb_var_screeninfo *var = &info->var; 1131 struct mfb_info *mfbi = info->par; 1132 struct fsl_diu_data *data = mfbi->parent; 1133 struct diu_ad *ad = mfbi->ad; 1134 struct diu __iomem *hw; 1135 1136 hw = data->diu_reg; 1137 1138 set_fix(info); 1139 1140 len = info->var.yres_virtual * info->fix.line_length; 1141 /* Alloc & dealloc each time resolution/bpp change */ 1142 if (len != info->fix.smem_len) { 1143 if (info->fix.smem_start) 1144 unmap_video_memory(info); 1145 1146 /* Memory allocation for framebuffer */ 1147 if (map_video_memory(info)) { 1148 fb_err(info, "unable to allocate fb memory 1\n"); 1149 return -ENOMEM; 1150 } 1151 } 1152 1153 if (diu_ops.get_pixel_format) 1154 ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port, 1155 var->bits_per_pixel); 1156 else 1157 ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel); 1158 1159 ad->addr = cpu_to_le32(info->fix.smem_start); 1160 ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) | 1161 var->xres_virtual) | mfbi->g_alpha; 1162 /* AOI should not be greater than display size */ 1163 ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres); 1164 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset); 1165 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d); 1166 1167 /* Disable chroma keying function */ 1168 ad->ckmax_r = 0; 1169 ad->ckmax_g = 0; 1170 ad->ckmax_b = 0; 1171 1172 ad->ckmin_r = 255; 1173 ad->ckmin_g = 255; 1174 ad->ckmin_b = 255; 1175 1176 if (mfbi->index == PLANE0) 1177 update_lcdc(info); 1178 return 0; 1179 } 1180 CNVT_TOHW(__u32 val,__u32 width)1181 static inline __u32 CNVT_TOHW(__u32 val, __u32 width) 1182 { 1183 return ((val << width) + 0x7FFF - val) >> 16; 1184 } 1185 1186 /* 1187 * Set a single color register. The values supplied have a 16 bit magnitude 1188 * which needs to be scaled in this function for the hardware. Things to take 1189 * into consideration are how many color registers, if any, are supported with 1190 * the current color visual. With truecolor mode no color palettes are 1191 * supported. Here a pseudo palette is created which we store the value in 1192 * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited 1193 * color palette. 1194 */ fsl_diu_setcolreg(unsigned int regno,unsigned int red,unsigned int green,unsigned int blue,unsigned int transp,struct fb_info * info)1195 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red, 1196 unsigned int green, unsigned int blue, 1197 unsigned int transp, struct fb_info *info) 1198 { 1199 int ret = 1; 1200 1201 /* 1202 * If greyscale is true, then we convert the RGB value 1203 * to greyscale no matter what visual we are using. 1204 */ 1205 if (info->var.grayscale) 1206 red = green = blue = (19595 * red + 38470 * green + 1207 7471 * blue) >> 16; 1208 switch (info->fix.visual) { 1209 case FB_VISUAL_TRUECOLOR: 1210 /* 1211 * 16-bit True Colour. We encode the RGB value 1212 * according to the RGB bitfield information. 1213 */ 1214 if (regno < 16) { 1215 u32 *pal = info->pseudo_palette; 1216 u32 v; 1217 1218 red = CNVT_TOHW(red, info->var.red.length); 1219 green = CNVT_TOHW(green, info->var.green.length); 1220 blue = CNVT_TOHW(blue, info->var.blue.length); 1221 transp = CNVT_TOHW(transp, info->var.transp.length); 1222 1223 v = (red << info->var.red.offset) | 1224 (green << info->var.green.offset) | 1225 (blue << info->var.blue.offset) | 1226 (transp << info->var.transp.offset); 1227 1228 pal[regno] = v; 1229 ret = 0; 1230 } 1231 break; 1232 } 1233 1234 return ret; 1235 } 1236 1237 /* 1238 * Pan (or wrap, depending on the `vmode' field) the display using the 1239 * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values 1240 * don't fit, return -EINVAL. 1241 */ fsl_diu_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)1242 static int fsl_diu_pan_display(struct fb_var_screeninfo *var, 1243 struct fb_info *info) 1244 { 1245 if ((info->var.xoffset == var->xoffset) && 1246 (info->var.yoffset == var->yoffset)) 1247 return 0; /* No change, do nothing */ 1248 1249 if (var->xoffset + info->var.xres > info->var.xres_virtual 1250 || var->yoffset + info->var.yres > info->var.yres_virtual) 1251 return -EINVAL; 1252 1253 info->var.xoffset = var->xoffset; 1254 info->var.yoffset = var->yoffset; 1255 1256 if (var->vmode & FB_VMODE_YWRAP) 1257 info->var.vmode |= FB_VMODE_YWRAP; 1258 else 1259 info->var.vmode &= ~FB_VMODE_YWRAP; 1260 1261 fsl_diu_set_aoi(info); 1262 1263 return 0; 1264 } 1265 fsl_diu_ioctl(struct fb_info * info,unsigned int cmd,unsigned long arg)1266 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd, 1267 unsigned long arg) 1268 { 1269 struct mfb_info *mfbi = info->par; 1270 struct diu_ad *ad = mfbi->ad; 1271 struct mfb_chroma_key ck; 1272 unsigned char global_alpha; 1273 struct aoi_display_offset aoi_d; 1274 __u32 pix_fmt; 1275 void __user *buf = (void __user *)arg; 1276 1277 if (!arg) 1278 return -EINVAL; 1279 1280 fb_dbg(info, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd, 1281 _IOC_DIR(cmd) & _IOC_READ ? "R" : "", 1282 _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "", 1283 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd)); 1284 1285 switch (cmd) { 1286 case MFB_SET_PIXFMT_OLD: 1287 fb_warn(info, 1288 "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n", 1289 MFB_SET_PIXFMT_OLD); 1290 fallthrough; 1291 case MFB_SET_PIXFMT: 1292 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt))) 1293 return -EFAULT; 1294 ad->pix_fmt = pix_fmt; 1295 break; 1296 case MFB_GET_PIXFMT_OLD: 1297 fb_warn(info, 1298 "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n", 1299 MFB_GET_PIXFMT_OLD); 1300 fallthrough; 1301 case MFB_GET_PIXFMT: 1302 pix_fmt = ad->pix_fmt; 1303 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt))) 1304 return -EFAULT; 1305 break; 1306 case MFB_SET_AOID: 1307 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d))) 1308 return -EFAULT; 1309 mfbi->x_aoi_d = aoi_d.x_aoi_d; 1310 mfbi->y_aoi_d = aoi_d.y_aoi_d; 1311 fsl_diu_check_var(&info->var, info); 1312 fsl_diu_set_aoi(info); 1313 break; 1314 case MFB_GET_AOID: 1315 aoi_d.x_aoi_d = mfbi->x_aoi_d; 1316 aoi_d.y_aoi_d = mfbi->y_aoi_d; 1317 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d))) 1318 return -EFAULT; 1319 break; 1320 case MFB_GET_ALPHA: 1321 global_alpha = mfbi->g_alpha; 1322 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha))) 1323 return -EFAULT; 1324 break; 1325 case MFB_SET_ALPHA: 1326 /* set panel information */ 1327 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha))) 1328 return -EFAULT; 1329 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) | 1330 (global_alpha & 0xff); 1331 mfbi->g_alpha = global_alpha; 1332 break; 1333 case MFB_SET_CHROMA_KEY: 1334 /* set panel winformation */ 1335 if (copy_from_user(&ck, buf, sizeof(ck))) 1336 return -EFAULT; 1337 1338 if (ck.enable && 1339 (ck.red_max < ck.red_min || 1340 ck.green_max < ck.green_min || 1341 ck.blue_max < ck.blue_min)) 1342 return -EINVAL; 1343 1344 if (!ck.enable) { 1345 ad->ckmax_r = 0; 1346 ad->ckmax_g = 0; 1347 ad->ckmax_b = 0; 1348 ad->ckmin_r = 255; 1349 ad->ckmin_g = 255; 1350 ad->ckmin_b = 255; 1351 } else { 1352 ad->ckmax_r = ck.red_max; 1353 ad->ckmax_g = ck.green_max; 1354 ad->ckmax_b = ck.blue_max; 1355 ad->ckmin_r = ck.red_min; 1356 ad->ckmin_g = ck.green_min; 1357 ad->ckmin_b = ck.blue_min; 1358 } 1359 break; 1360 #ifdef CONFIG_PPC_MPC512x 1361 case MFB_SET_GAMMA: { 1362 struct fsl_diu_data *data = mfbi->parent; 1363 1364 if (copy_from_user(data->gamma, buf, sizeof(data->gamma))) 1365 return -EFAULT; 1366 setbits32(&data->diu_reg->gamma, 0); /* Force table reload */ 1367 break; 1368 } 1369 case MFB_GET_GAMMA: { 1370 struct fsl_diu_data *data = mfbi->parent; 1371 1372 if (copy_to_user(buf, data->gamma, sizeof(data->gamma))) 1373 return -EFAULT; 1374 break; 1375 } 1376 #endif 1377 default: 1378 fb_err(info, "unknown ioctl command (0x%08X)\n", cmd); 1379 return -ENOIOCTLCMD; 1380 } 1381 1382 return 0; 1383 } 1384 fsl_diu_enable_interrupts(struct fsl_diu_data * data)1385 static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data) 1386 { 1387 u32 int_mask = INT_UNDRUN; /* enable underrun detection */ 1388 1389 if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE)) 1390 int_mask |= INT_VSYNC; /* enable vertical sync */ 1391 1392 clrbits32(&data->diu_reg->int_mask, int_mask); 1393 } 1394 1395 /* turn on fb if count == 1 1396 */ fsl_diu_open(struct fb_info * info,int user)1397 static int fsl_diu_open(struct fb_info *info, int user) 1398 { 1399 struct mfb_info *mfbi = info->par; 1400 int res = 0; 1401 1402 /* free boot splash memory on first /dev/fb0 open */ 1403 if ((mfbi->index == PLANE0) && diu_ops.release_bootmem) 1404 diu_ops.release_bootmem(); 1405 1406 spin_lock(&diu_lock); 1407 mfbi->count++; 1408 if (mfbi->count == 1) { 1409 fsl_diu_check_var(&info->var, info); 1410 res = fsl_diu_set_par(info); 1411 if (res < 0) 1412 mfbi->count--; 1413 else { 1414 fsl_diu_enable_interrupts(mfbi->parent); 1415 fsl_diu_enable_panel(info); 1416 } 1417 } 1418 1419 spin_unlock(&diu_lock); 1420 return res; 1421 } 1422 1423 /* turn off fb if count == 0 1424 */ fsl_diu_release(struct fb_info * info,int user)1425 static int fsl_diu_release(struct fb_info *info, int user) 1426 { 1427 struct mfb_info *mfbi = info->par; 1428 1429 spin_lock(&diu_lock); 1430 mfbi->count--; 1431 if (mfbi->count == 0) { 1432 struct fsl_diu_data *data = mfbi->parent; 1433 bool disable = true; 1434 int i; 1435 1436 /* Disable interrupts only if all AOIs are closed */ 1437 for (i = 0; i < NUM_AOIS; i++) { 1438 struct mfb_info *mi = data->fsl_diu_info[i].par; 1439 1440 if (mi->count) 1441 disable = false; 1442 } 1443 if (disable) 1444 out_be32(&data->diu_reg->int_mask, 0xffffffff); 1445 fsl_diu_disable_panel(info); 1446 } 1447 1448 spin_unlock(&diu_lock); 1449 return 0; 1450 } 1451 1452 static const struct fb_ops fsl_diu_ops = { 1453 .owner = THIS_MODULE, 1454 FB_DEFAULT_IOMEM_OPS, 1455 .fb_check_var = fsl_diu_check_var, 1456 .fb_set_par = fsl_diu_set_par, 1457 .fb_setcolreg = fsl_diu_setcolreg, 1458 .fb_pan_display = fsl_diu_pan_display, 1459 .fb_ioctl = fsl_diu_ioctl, 1460 .fb_open = fsl_diu_open, 1461 .fb_release = fsl_diu_release, 1462 .fb_cursor = fsl_diu_cursor, 1463 }; 1464 install_fb(struct fb_info * info)1465 static int install_fb(struct fb_info *info) 1466 { 1467 int rc; 1468 struct mfb_info *mfbi = info->par; 1469 struct fsl_diu_data *data = mfbi->parent; 1470 const char *aoi_mode, *init_aoi_mode = "320x240"; 1471 struct fb_videomode *db = fsl_diu_mode_db; 1472 unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db); 1473 int has_default_mode = 1; 1474 1475 info->var.activate = FB_ACTIVATE_NOW; 1476 info->fbops = &fsl_diu_ops; 1477 info->flags = FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK | 1478 FBINFO_READS_FAST; 1479 info->pseudo_palette = mfbi->pseudo_palette; 1480 1481 rc = fb_alloc_cmap(&info->cmap, 16, 0); 1482 if (rc) 1483 return rc; 1484 1485 if (mfbi->index == PLANE0) { 1486 if (data->has_edid) { 1487 /* Now build modedb from EDID */ 1488 fb_edid_to_monspecs(data->edid_data, &info->monspecs); 1489 fb_videomode_to_modelist(info->monspecs.modedb, 1490 info->monspecs.modedb_len, 1491 &info->modelist); 1492 db = info->monspecs.modedb; 1493 dbsize = info->monspecs.modedb_len; 1494 } 1495 aoi_mode = fb_mode; 1496 } else { 1497 aoi_mode = init_aoi_mode; 1498 } 1499 rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL, 1500 default_bpp); 1501 if (!rc) { 1502 /* 1503 * For plane 0 we continue and look into 1504 * driver's internal modedb. 1505 */ 1506 if ((mfbi->index == PLANE0) && data->has_edid) 1507 has_default_mode = 0; 1508 else 1509 return -EINVAL; 1510 } 1511 1512 if (!has_default_mode) { 1513 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db, 1514 ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp); 1515 if (rc) 1516 has_default_mode = 1; 1517 } 1518 1519 /* Still not found, use preferred mode from database if any */ 1520 if (!has_default_mode && info->monspecs.modedb) { 1521 struct fb_monspecs *specs = &info->monspecs; 1522 struct fb_videomode *modedb = &specs->modedb[0]; 1523 1524 /* 1525 * Get preferred timing. If not found, 1526 * first mode in database will be used. 1527 */ 1528 if (specs->misc & FB_MISC_1ST_DETAIL) { 1529 int i; 1530 1531 for (i = 0; i < specs->modedb_len; i++) { 1532 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) { 1533 modedb = &specs->modedb[i]; 1534 break; 1535 } 1536 } 1537 } 1538 1539 info->var.bits_per_pixel = default_bpp; 1540 fb_videomode_to_var(&info->var, modedb); 1541 } 1542 1543 if (fsl_diu_check_var(&info->var, info)) { 1544 fb_err(info, "fsl_diu_check_var failed\n"); 1545 unmap_video_memory(info); 1546 fb_dealloc_cmap(&info->cmap); 1547 return -EINVAL; 1548 } 1549 1550 if (register_framebuffer(info) < 0) { 1551 fb_err(info, "register_framebuffer failed\n"); 1552 unmap_video_memory(info); 1553 fb_dealloc_cmap(&info->cmap); 1554 return -EINVAL; 1555 } 1556 1557 mfbi->registered = 1; 1558 fb_info(info, "%s registered successfully\n", mfbi->id); 1559 1560 return 0; 1561 } 1562 uninstall_fb(struct fb_info * info)1563 static void uninstall_fb(struct fb_info *info) 1564 { 1565 struct mfb_info *mfbi = info->par; 1566 1567 if (!mfbi->registered) 1568 return; 1569 1570 unregister_framebuffer(info); 1571 unmap_video_memory(info); 1572 fb_dealloc_cmap(&info->cmap); 1573 1574 mfbi->registered = 0; 1575 } 1576 fsl_diu_isr(int irq,void * dev_id)1577 static irqreturn_t fsl_diu_isr(int irq, void *dev_id) 1578 { 1579 struct diu __iomem *hw = dev_id; 1580 uint32_t status = in_be32(&hw->int_status); 1581 1582 if (status) { 1583 /* This is the workaround for underrun */ 1584 if (status & INT_UNDRUN) { 1585 out_be32(&hw->diu_mode, 0); 1586 udelay(1); 1587 out_be32(&hw->diu_mode, 1); 1588 } 1589 #if defined(CONFIG_NOT_COHERENT_CACHE) 1590 else if (status & INT_VSYNC) { 1591 unsigned int i; 1592 1593 for (i = 0; i < coherence_data_size; 1594 i += d_cache_line_size) 1595 __asm__ __volatile__ ( 1596 "dcbz 0, %[input]" 1597 ::[input]"r"(&coherence_data[i])); 1598 } 1599 #endif 1600 return IRQ_HANDLED; 1601 } 1602 return IRQ_NONE; 1603 } 1604 1605 #ifdef CONFIG_PM 1606 /* 1607 * Power management hooks. Note that we won't be called from IRQ context, 1608 * unlike the blank functions above, so we may sleep. 1609 */ fsl_diu_suspend(struct platform_device * ofdev,pm_message_t state)1610 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state) 1611 { 1612 struct fsl_diu_data *data; 1613 1614 data = dev_get_drvdata(&ofdev->dev); 1615 disable_lcdc(data->fsl_diu_info); 1616 1617 return 0; 1618 } 1619 fsl_diu_resume(struct platform_device * ofdev)1620 static int fsl_diu_resume(struct platform_device *ofdev) 1621 { 1622 struct fsl_diu_data *data; 1623 unsigned int i; 1624 1625 data = dev_get_drvdata(&ofdev->dev); 1626 1627 fsl_diu_enable_interrupts(data); 1628 update_lcdc(data->fsl_diu_info); 1629 for (i = 0; i < NUM_AOIS; i++) { 1630 if (data->mfb[i].count) 1631 fsl_diu_enable_panel(&data->fsl_diu_info[i]); 1632 } 1633 1634 return 0; 1635 } 1636 1637 #else 1638 #define fsl_diu_suspend NULL 1639 #define fsl_diu_resume NULL 1640 #endif /* CONFIG_PM */ 1641 store_monitor(struct device * device,struct device_attribute * attr,const char * buf,size_t count)1642 static ssize_t store_monitor(struct device *device, 1643 struct device_attribute *attr, const char *buf, size_t count) 1644 { 1645 enum fsl_diu_monitor_port old_monitor_port; 1646 struct fsl_diu_data *data = 1647 container_of(attr, struct fsl_diu_data, dev_attr); 1648 1649 old_monitor_port = data->monitor_port; 1650 data->monitor_port = fsl_diu_name_to_port(buf); 1651 1652 if (old_monitor_port != data->monitor_port) { 1653 /* All AOIs need adjust pixel format 1654 * fsl_diu_set_par only change the pixsel format here 1655 * unlikely to fail. */ 1656 unsigned int i; 1657 1658 for (i=0; i < NUM_AOIS; i++) 1659 fsl_diu_set_par(&data->fsl_diu_info[i]); 1660 } 1661 return count; 1662 } 1663 show_monitor(struct device * device,struct device_attribute * attr,char * buf)1664 static ssize_t show_monitor(struct device *device, 1665 struct device_attribute *attr, char *buf) 1666 { 1667 struct fsl_diu_data *data = 1668 container_of(attr, struct fsl_diu_data, dev_attr); 1669 1670 switch (data->monitor_port) { 1671 case FSL_DIU_PORT_DVI: 1672 return sprintf(buf, "DVI\n"); 1673 case FSL_DIU_PORT_LVDS: 1674 return sprintf(buf, "Single-link LVDS\n"); 1675 case FSL_DIU_PORT_DLVDS: 1676 return sprintf(buf, "Dual-link LVDS\n"); 1677 } 1678 1679 return 0; 1680 } 1681 fsl_diu_probe(struct platform_device * pdev)1682 static int fsl_diu_probe(struct platform_device *pdev) 1683 { 1684 struct device_node *np = pdev->dev.of_node; 1685 struct mfb_info *mfbi; 1686 struct fsl_diu_data *data; 1687 dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */ 1688 const void *prop; 1689 unsigned int i; 1690 int ret; 1691 1692 data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data), 1693 &dma_addr, GFP_DMA | __GFP_ZERO); 1694 if (!data) 1695 return -ENOMEM; 1696 data->dma_addr = dma_addr; 1697 1698 /* 1699 * dma_alloc_coherent() uses a page allocator, so the address is 1700 * always page-aligned. We need the memory to be 32-byte aligned, 1701 * so that's good. However, if one day the allocator changes, we 1702 * need to catch that. It's not worth the effort to handle unaligned 1703 * alloctions now because it's highly unlikely to ever be a problem. 1704 */ 1705 if ((unsigned long)data & 31) { 1706 dev_err(&pdev->dev, "misaligned allocation"); 1707 ret = -ENOMEM; 1708 goto error; 1709 } 1710 1711 spin_lock_init(&data->reg_lock); 1712 1713 for (i = 0; i < NUM_AOIS; i++) { 1714 struct fb_info *info = &data->fsl_diu_info[i]; 1715 1716 info->device = &pdev->dev; 1717 info->par = &data->mfb[i]; 1718 1719 /* 1720 * We store the physical address of the AD in the reserved 1721 * 'paddr' field of the AD itself. 1722 */ 1723 data->ad[i].paddr = DMA_ADDR(data, ad[i]); 1724 1725 info->fix.smem_start = 0; 1726 1727 /* Initialize the AOI data structure */ 1728 mfbi = info->par; 1729 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info)); 1730 mfbi->parent = data; 1731 mfbi->ad = &data->ad[i]; 1732 } 1733 1734 /* Get the EDID data from the device tree, if present */ 1735 prop = of_get_property(np, "edid", &ret); 1736 if (prop && ret == EDID_LENGTH) { 1737 memcpy(data->edid_data, prop, EDID_LENGTH); 1738 data->has_edid = true; 1739 } 1740 1741 data->diu_reg = of_iomap(np, 0); 1742 if (!data->diu_reg) { 1743 dev_err(&pdev->dev, "cannot map DIU registers\n"); 1744 ret = -EFAULT; 1745 goto error; 1746 } 1747 1748 /* Get the IRQ of the DIU */ 1749 data->irq = irq_of_parse_and_map(np, 0); 1750 1751 if (!data->irq) { 1752 dev_err(&pdev->dev, "could not get DIU IRQ\n"); 1753 ret = -EINVAL; 1754 goto error; 1755 } 1756 data->monitor_port = monitor_port; 1757 1758 /* Initialize the dummy Area Descriptor */ 1759 data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi)); 1760 data->dummy_ad.pix_fmt = 0x88882317; 1761 data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4); 1762 data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) | 2); 1763 data->dummy_ad.offset_xyi = 0; 1764 data->dummy_ad.offset_xyd = 0; 1765 data->dummy_ad.next_ad = 0; 1766 data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad); 1767 1768 /* 1769 * Let DIU continue to display splash screen if it was pre-initialized 1770 * by the bootloader; otherwise, clear the display. 1771 */ 1772 if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0) 1773 out_be32(&data->diu_reg->desc[0], 0); 1774 1775 out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr); 1776 out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr); 1777 1778 /* 1779 * Older versions of U-Boot leave interrupts enabled, so disable 1780 * all of them and clear the status register. 1781 */ 1782 out_be32(&data->diu_reg->int_mask, 0xffffffff); 1783 in_be32(&data->diu_reg->int_status); 1784 1785 ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb", 1786 data->diu_reg); 1787 if (ret) { 1788 dev_err(&pdev->dev, "could not claim irq\n"); 1789 goto error; 1790 } 1791 1792 for (i = 0; i < NUM_AOIS; i++) { 1793 ret = install_fb(&data->fsl_diu_info[i]); 1794 if (ret) { 1795 dev_err(&pdev->dev, "could not register fb %d\n", i); 1796 free_irq(data->irq, data->diu_reg); 1797 goto error; 1798 } 1799 } 1800 1801 sysfs_attr_init(&data->dev_attr.attr); 1802 data->dev_attr.attr.name = "monitor"; 1803 data->dev_attr.attr.mode = S_IRUGO|S_IWUSR; 1804 data->dev_attr.show = show_monitor; 1805 data->dev_attr.store = store_monitor; 1806 ret = device_create_file(&pdev->dev, &data->dev_attr); 1807 if (ret) { 1808 dev_err(&pdev->dev, "could not create sysfs file %s\n", 1809 data->dev_attr.attr.name); 1810 } 1811 1812 dev_set_drvdata(&pdev->dev, data); 1813 return 0; 1814 1815 error: 1816 for (i = 0; i < NUM_AOIS; i++) 1817 uninstall_fb(&data->fsl_diu_info[i]); 1818 1819 iounmap(data->diu_reg); 1820 1821 return ret; 1822 } 1823 fsl_diu_remove(struct platform_device * pdev)1824 static void fsl_diu_remove(struct platform_device *pdev) 1825 { 1826 struct fsl_diu_data *data; 1827 int i; 1828 1829 data = dev_get_drvdata(&pdev->dev); 1830 disable_lcdc(&data->fsl_diu_info[0]); 1831 1832 free_irq(data->irq, data->diu_reg); 1833 1834 for (i = 0; i < NUM_AOIS; i++) 1835 uninstall_fb(&data->fsl_diu_info[i]); 1836 1837 iounmap(data->diu_reg); 1838 } 1839 1840 #ifndef MODULE fsl_diu_setup(char * options)1841 static int __init fsl_diu_setup(char *options) 1842 { 1843 char *opt; 1844 unsigned long val; 1845 1846 if (!options || !*options) 1847 return 0; 1848 1849 while ((opt = strsep(&options, ",")) != NULL) { 1850 if (!*opt) 1851 continue; 1852 if (!strncmp(opt, "monitor=", 8)) { 1853 monitor_port = fsl_diu_name_to_port(opt + 8); 1854 } else if (!strncmp(opt, "bpp=", 4)) { 1855 if (!kstrtoul(opt + 4, 10, &val)) 1856 default_bpp = val; 1857 } else 1858 fb_mode = opt; 1859 } 1860 1861 return 0; 1862 } 1863 #endif 1864 1865 static const struct of_device_id fsl_diu_match[] = { 1866 #ifdef CONFIG_PPC_MPC512x 1867 { 1868 .compatible = "fsl,mpc5121-diu", 1869 }, 1870 #endif 1871 { 1872 .compatible = "fsl,diu", 1873 }, 1874 {} 1875 }; 1876 MODULE_DEVICE_TABLE(of, fsl_diu_match); 1877 1878 static struct platform_driver fsl_diu_driver = { 1879 .driver = { 1880 .name = "fsl-diu-fb", 1881 .of_match_table = fsl_diu_match, 1882 }, 1883 .probe = fsl_diu_probe, 1884 .remove_new = fsl_diu_remove, 1885 .suspend = fsl_diu_suspend, 1886 .resume = fsl_diu_resume, 1887 }; 1888 fsl_diu_init(void)1889 static int __init fsl_diu_init(void) 1890 { 1891 #ifdef CONFIG_NOT_COHERENT_CACHE 1892 struct device_node *np; 1893 const u32 *prop; 1894 #endif 1895 int ret; 1896 #ifndef MODULE 1897 char *option; 1898 1899 /* 1900 * For kernel boot options (in 'video=xxxfb:<options>' format) 1901 */ 1902 if (fb_get_options("fslfb", &option)) 1903 return -ENODEV; 1904 fsl_diu_setup(option); 1905 #else 1906 monitor_port = fsl_diu_name_to_port(monitor_string); 1907 #endif 1908 1909 /* 1910 * Must to verify set_pixel_clock. If not implement on platform, 1911 * then that means that there is no platform support for the DIU. 1912 */ 1913 if (!diu_ops.set_pixel_clock) 1914 return -ENODEV; 1915 1916 pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n"); 1917 1918 #ifdef CONFIG_NOT_COHERENT_CACHE 1919 np = of_get_cpu_node(0, NULL); 1920 if (!np) { 1921 pr_err("fsl-diu-fb: can't find 'cpu' device node\n"); 1922 return -ENODEV; 1923 } 1924 1925 prop = of_get_property(np, "d-cache-size", NULL); 1926 if (prop == NULL) { 1927 pr_err("fsl-diu-fb: missing 'd-cache-size' property' " 1928 "in 'cpu' node\n"); 1929 of_node_put(np); 1930 return -ENODEV; 1931 } 1932 1933 /* 1934 * Freescale PLRU requires 13/8 times the cache size to do a proper 1935 * displacement flush 1936 */ 1937 coherence_data_size = be32_to_cpup(prop) * 13; 1938 coherence_data_size /= 8; 1939 1940 pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n", 1941 coherence_data_size); 1942 1943 prop = of_get_property(np, "d-cache-line-size", NULL); 1944 if (prop == NULL) { 1945 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' " 1946 "in 'cpu' node\n"); 1947 of_node_put(np); 1948 return -ENODEV; 1949 } 1950 d_cache_line_size = be32_to_cpup(prop); 1951 1952 pr_debug("fsl-diu-fb: cache lines size is %u bytes\n", 1953 d_cache_line_size); 1954 1955 of_node_put(np); 1956 coherence_data = vmalloc(coherence_data_size); 1957 if (!coherence_data) 1958 return -ENOMEM; 1959 #endif 1960 1961 ret = platform_driver_register(&fsl_diu_driver); 1962 if (ret) { 1963 pr_err("fsl-diu-fb: failed to register platform driver\n"); 1964 #if defined(CONFIG_NOT_COHERENT_CACHE) 1965 vfree(coherence_data); 1966 #endif 1967 } 1968 return ret; 1969 } 1970 fsl_diu_exit(void)1971 static void __exit fsl_diu_exit(void) 1972 { 1973 platform_driver_unregister(&fsl_diu_driver); 1974 #if defined(CONFIG_NOT_COHERENT_CACHE) 1975 vfree(coherence_data); 1976 #endif 1977 } 1978 1979 module_init(fsl_diu_init); 1980 module_exit(fsl_diu_exit); 1981 1982 MODULE_AUTHOR("York Sun <yorksun@freescale.com>"); 1983 MODULE_DESCRIPTION("Freescale DIU framebuffer driver"); 1984 MODULE_LICENSE("GPL"); 1985 1986 module_param_named(mode, fb_mode, charp, 0); 1987 MODULE_PARM_DESC(mode, 1988 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" "); 1989 module_param_named(bpp, default_bpp, ulong, 0); 1990 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'"); 1991 module_param_named(monitor, monitor_string, charp, 0); 1992 MODULE_PARM_DESC(monitor, "Specify the monitor port " 1993 "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform"); 1994 1995