1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * drivers/video/pvr2fb.c 4 * 5 * Frame buffer and fbcon support for the NEC PowerVR2 found within the Sega 6 * Dreamcast. 7 * 8 * Copyright (c) 2001 M. R. Brown <mrbrown@0xd6.org> 9 * Copyright (c) 2001 - 2008 Paul Mundt <lethal@linux-sh.org> 10 * 11 * This driver is mostly based on the excellent amifb and vfb sources. It uses 12 * an odd scheme for converting hardware values to/from framebuffer values, 13 * here are some hacked-up formulas: 14 * 15 * The Dreamcast has screen offsets from each side of its four borders and 16 * the start offsets of the display window. I used these values to calculate 17 * 'pseudo' values (think of them as placeholders) for the fb video mode, so 18 * that when it came time to convert these values back into their hardware 19 * values, I could just add mode- specific offsets to get the correct mode 20 * settings: 21 * 22 * left_margin = diwstart_h - borderstart_h; 23 * right_margin = borderstop_h - (diwstart_h + xres); 24 * upper_margin = diwstart_v - borderstart_v; 25 * lower_margin = borderstop_v - (diwstart_h + yres); 26 * 27 * hsync_len = borderstart_h + (hsync_total - borderstop_h); 28 * vsync_len = borderstart_v + (vsync_total - borderstop_v); 29 * 30 * Then, when it's time to convert back to hardware settings, the only 31 * constants are the borderstart_* offsets, all other values are derived from 32 * the fb video mode: 33 * 34 * // PAL 35 * borderstart_h = 116; 36 * borderstart_v = 44; 37 * ... 38 * borderstop_h = borderstart_h + hsync_total - hsync_len; 39 * ... 40 * diwstart_v = borderstart_v - upper_margin; 41 * 42 * However, in the current implementation, the borderstart values haven't had 43 * the benefit of being fully researched, so some modes may be broken. 44 */ 45 46 #undef DEBUG 47 48 #include <linux/module.h> 49 #include <linux/kernel.h> 50 #include <linux/errno.h> 51 #include <linux/string.h> 52 #include <linux/mm.h> 53 #include <linux/slab.h> 54 #include <linux/delay.h> 55 #include <linux/interrupt.h> 56 #include <linux/fb.h> 57 #include <linux/init.h> 58 #include <linux/pci.h> 59 60 #ifdef CONFIG_SH_DREAMCAST 61 #include <asm/machvec.h> 62 #include <mach-dreamcast/mach/sysasic.h> 63 #endif 64 65 #ifdef CONFIG_PVR2_DMA 66 #include <linux/pagemap.h> 67 #include <mach/dma.h> 68 #include <asm/dma.h> 69 #endif 70 71 #ifdef CONFIG_SH_STORE_QUEUES 72 #include <linux/uaccess.h> 73 #include <cpu/sq.h> 74 #endif 75 76 #ifndef PCI_DEVICE_ID_NEC_NEON250 77 # define PCI_DEVICE_ID_NEC_NEON250 0x0067 78 #endif 79 80 /* 2D video registers */ 81 #define DISP_BASE par->mmio_base 82 #define DISP_BRDRCOLR (DISP_BASE + 0x40) 83 #define DISP_DIWMODE (DISP_BASE + 0x44) 84 #define DISP_DIWADDRL (DISP_BASE + 0x50) 85 #define DISP_DIWADDRS (DISP_BASE + 0x54) 86 #define DISP_DIWSIZE (DISP_BASE + 0x5c) 87 #define DISP_SYNCCONF (DISP_BASE + 0xd0) 88 #define DISP_BRDRHORZ (DISP_BASE + 0xd4) 89 #define DISP_SYNCSIZE (DISP_BASE + 0xd8) 90 #define DISP_BRDRVERT (DISP_BASE + 0xdc) 91 #define DISP_DIWCONF (DISP_BASE + 0xe8) 92 #define DISP_DIWHSTRT (DISP_BASE + 0xec) 93 #define DISP_DIWVSTRT (DISP_BASE + 0xf0) 94 #define DISP_PIXDEPTH (DISP_BASE + 0x108) 95 96 /* Pixel clocks, one for TV output, doubled for VGA output */ 97 #define TV_CLK 74239 98 #define VGA_CLK 37119 99 100 /* This is for 60Hz - the VTOTAL is doubled for interlaced modes */ 101 #define PAL_HTOTAL 863 102 #define PAL_VTOTAL 312 103 #define NTSC_HTOTAL 857 104 #define NTSC_VTOTAL 262 105 106 /* Supported cable types */ 107 enum { CT_VGA, CT_NONE, CT_RGB, CT_COMPOSITE }; 108 109 /* Supported video output types */ 110 enum { VO_PAL, VO_NTSC, VO_VGA }; 111 112 /* Supported palette types */ 113 enum { PAL_ARGB1555, PAL_RGB565, PAL_ARGB4444, PAL_ARGB8888 }; 114 115 struct pvr2_params { unsigned int val; char *name; }; 116 static struct pvr2_params cables[] = { 117 { CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" }, 118 }; 119 120 static struct pvr2_params outputs[] = { 121 { VO_PAL, "PAL" }, { VO_NTSC, "NTSC" }, { VO_VGA, "VGA" }, 122 }; 123 124 /* 125 * This describes the current video mode 126 */ 127 128 static struct pvr2fb_par { 129 unsigned int hsync_total; /* Clocks/line */ 130 unsigned int vsync_total; /* Lines/field */ 131 unsigned int borderstart_h; 132 unsigned int borderstop_h; 133 unsigned int borderstart_v; 134 unsigned int borderstop_v; 135 unsigned int diwstart_h; /* Horizontal offset of the display field */ 136 unsigned int diwstart_v; /* Vertical offset of the display field, for 137 interlaced modes, this is the long field */ 138 unsigned long disp_start; /* Address of image within VRAM */ 139 unsigned char is_interlaced; /* Is the display interlaced? */ 140 unsigned char is_doublescan; /* Are scanlines output twice? (doublescan) */ 141 unsigned char is_lowres; /* Is horizontal pixel-doubling enabled? */ 142 143 void __iomem *mmio_base; /* MMIO base */ 144 u32 palette[16]; 145 } *currentpar; 146 147 static struct fb_info *fb_info; 148 149 static struct fb_fix_screeninfo pvr2_fix = { 150 .id = "NEC PowerVR2", 151 .type = FB_TYPE_PACKED_PIXELS, 152 .visual = FB_VISUAL_TRUECOLOR, 153 .ypanstep = 1, 154 .ywrapstep = 1, 155 .accel = FB_ACCEL_NONE, 156 }; 157 158 static const struct fb_var_screeninfo pvr2_var = { 159 .xres = 640, 160 .yres = 480, 161 .xres_virtual = 640, 162 .yres_virtual = 480, 163 .bits_per_pixel =16, 164 .red = { 11, 5, 0 }, 165 .green = { 5, 6, 0 }, 166 .blue = { 0, 5, 0 }, 167 .activate = FB_ACTIVATE_NOW, 168 .height = -1, 169 .width = -1, 170 .vmode = FB_VMODE_NONINTERLACED, 171 }; 172 173 static int cable_type = CT_VGA; 174 static int video_output = VO_VGA; 175 176 static int nopan = 0; 177 static int nowrap = 1; 178 179 /* 180 * We do all updating, blanking, etc. during the vertical retrace period 181 */ 182 static unsigned int do_vmode_full = 0; /* Change the video mode */ 183 static unsigned int do_vmode_pan = 0; /* Update the video mode */ 184 static short do_blank = 0; /* (Un)Blank the screen */ 185 186 static unsigned int is_blanked = 0; /* Is the screen blanked? */ 187 188 #ifdef CONFIG_SH_STORE_QUEUES 189 static unsigned long pvr2fb_map; 190 #endif 191 192 #ifdef CONFIG_PVR2_DMA 193 static unsigned int shdma = PVR2_CASCADE_CHAN; 194 static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS; 195 #endif 196 197 static struct fb_videomode pvr2_modedb[] = { 198 /* 199 * Broadcast video modes (PAL and NTSC). I'm unfamiliar with 200 * PAL-M and PAL-N, but from what I've read both modes parallel PAL and 201 * NTSC, so it shouldn't be a problem (I hope). 202 */ 203 204 { 205 /* 640x480 @ 60Hz interlaced (NTSC) */ 206 "ntsc_640x480i", 60, 640, 480, TV_CLK, 38, 33, 0, 18, 146, 26, 207 FB_SYNC_BROADCAST, FB_VMODE_INTERLACED | FB_VMODE_YWRAP 208 }, { 209 /* 640x240 @ 60Hz (NTSC) */ 210 /* XXX: Broken! Don't use... */ 211 "ntsc_640x240", 60, 640, 240, TV_CLK, 38, 33, 0, 0, 146, 22, 212 FB_SYNC_BROADCAST, FB_VMODE_YWRAP 213 }, { 214 /* 640x480 @ 60hz (VGA) */ 215 "vga_640x480", 60, 640, 480, VGA_CLK, 38, 33, 0, 18, 146, 26, 216 0, FB_VMODE_YWRAP 217 }, 218 }; 219 220 #define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb) 221 222 #define DEFMODE_NTSC 0 223 #define DEFMODE_PAL 0 224 #define DEFMODE_VGA 2 225 226 static int defmode = DEFMODE_NTSC; 227 static char *mode_option = NULL; 228 229 static inline void pvr2fb_set_pal_type(unsigned int type) 230 { 231 struct pvr2fb_par *par = (struct pvr2fb_par *)fb_info->par; 232 233 fb_writel(type, par->mmio_base + 0x108); 234 } 235 236 static inline void pvr2fb_set_pal_entry(struct pvr2fb_par *par, 237 unsigned int regno, 238 unsigned int val) 239 { 240 fb_writel(val, par->mmio_base + 0x1000 + (4 * regno)); 241 } 242 243 static int pvr2fb_blank(int blank, struct fb_info *info) 244 { 245 do_blank = blank ? blank : -1; 246 return 0; 247 } 248 249 static inline unsigned long get_line_length(int xres_virtual, int bpp) 250 { 251 return (unsigned long)((((xres_virtual*bpp)+31)&~31) >> 3); 252 } 253 254 static void set_color_bitfields(struct fb_var_screeninfo *var) 255 { 256 switch (var->bits_per_pixel) { 257 case 16: /* RGB 565 */ 258 pvr2fb_set_pal_type(PAL_RGB565); 259 var->red.offset = 11; var->red.length = 5; 260 var->green.offset = 5; var->green.length = 6; 261 var->blue.offset = 0; var->blue.length = 5; 262 var->transp.offset = 0; var->transp.length = 0; 263 break; 264 case 24: /* RGB 888 */ 265 var->red.offset = 16; var->red.length = 8; 266 var->green.offset = 8; var->green.length = 8; 267 var->blue.offset = 0; var->blue.length = 8; 268 var->transp.offset = 0; var->transp.length = 0; 269 break; 270 case 32: /* ARGB 8888 */ 271 pvr2fb_set_pal_type(PAL_ARGB8888); 272 var->red.offset = 16; var->red.length = 8; 273 var->green.offset = 8; var->green.length = 8; 274 var->blue.offset = 0; var->blue.length = 8; 275 var->transp.offset = 24; var->transp.length = 8; 276 break; 277 } 278 } 279 280 static int pvr2fb_setcolreg(unsigned int regno, unsigned int red, 281 unsigned int green, unsigned int blue, 282 unsigned int transp, struct fb_info *info) 283 { 284 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 285 unsigned int tmp; 286 287 if (regno > info->cmap.len) 288 return 1; 289 290 /* 291 * We only support the hardware palette for 16 and 32bpp. It's also 292 * expected that the palette format has been set by the time we get 293 * here, so we don't waste time setting it again. 294 */ 295 switch (info->var.bits_per_pixel) { 296 case 16: /* RGB 565 */ 297 tmp = (red & 0xf800) | 298 ((green & 0xfc00) >> 5) | 299 ((blue & 0xf800) >> 11); 300 301 pvr2fb_set_pal_entry(par, regno, tmp); 302 break; 303 case 24: /* RGB 888 */ 304 red >>= 8; green >>= 8; blue >>= 8; 305 tmp = (red << 16) | (green << 8) | blue; 306 break; 307 case 32: /* ARGB 8888 */ 308 red >>= 8; green >>= 8; blue >>= 8; 309 tmp = (transp << 24) | (red << 16) | (green << 8) | blue; 310 311 pvr2fb_set_pal_entry(par, regno, tmp); 312 break; 313 default: 314 pr_debug("Invalid bit depth %d?!?\n", info->var.bits_per_pixel); 315 return 1; 316 } 317 318 if (regno < 16) 319 ((u32*)(info->pseudo_palette))[regno] = tmp; 320 321 return 0; 322 } 323 324 /* 325 * Determine the cable type and initialize the cable output format. Don't do 326 * anything if the cable type has been overidden (via "cable:XX"). 327 */ 328 329 #define PCTRA ((void __iomem *)0xff80002c) 330 #define PDTRA ((void __iomem *)0xff800030) 331 #define VOUTC ((void __iomem *)0xa0702c00) 332 333 static int pvr2_init_cable(void) 334 { 335 if (cable_type < 0) { 336 fb_writel((fb_readl(PCTRA) & 0xfff0ffff) | 0x000a0000, 337 PCTRA); 338 cable_type = (fb_readw(PDTRA) >> 8) & 3; 339 } 340 341 /* Now select the output format (either composite or other) */ 342 /* XXX: Save the previous val first, as this reg is also AICA 343 related */ 344 if (cable_type == CT_COMPOSITE) 345 fb_writel(3 << 8, VOUTC); 346 else if (cable_type == CT_RGB) 347 fb_writel(1 << 9, VOUTC); 348 else 349 fb_writel(0, VOUTC); 350 351 return cable_type; 352 } 353 354 static int pvr2fb_set_par(struct fb_info *info) 355 { 356 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 357 struct fb_var_screeninfo *var = &info->var; 358 unsigned long line_length; 359 unsigned int vtotal; 360 361 /* 362 * XXX: It's possible that a user could use a VGA box, change the cable 363 * type in hardware (i.e. switch from VGA<->composite), then change 364 * modes (i.e. switching to another VT). If that happens we should 365 * automagically change the output format to cope, but currently I 366 * don't have a VGA box to make sure this works properly. 367 */ 368 cable_type = pvr2_init_cable(); 369 if (cable_type == CT_VGA && video_output != VO_VGA) 370 video_output = VO_VGA; 371 372 var->vmode &= FB_VMODE_MASK; 373 if (var->vmode & FB_VMODE_INTERLACED && video_output != VO_VGA) 374 par->is_interlaced = 1; 375 /* 376 * XXX: Need to be more creative with this (i.e. allow doublecan for 377 * PAL/NTSC output). 378 */ 379 if (var->vmode & FB_VMODE_DOUBLE && video_output == VO_VGA) 380 par->is_doublescan = 1; 381 382 par->hsync_total = var->left_margin + var->xres + var->right_margin + 383 var->hsync_len; 384 par->vsync_total = var->upper_margin + var->yres + var->lower_margin + 385 var->vsync_len; 386 387 if (var->sync & FB_SYNC_BROADCAST) { 388 vtotal = par->vsync_total; 389 if (par->is_interlaced) 390 vtotal /= 2; 391 if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) { 392 /* XXX: Check for start values here... */ 393 /* XXX: Check hardware for PAL-compatibility */ 394 par->borderstart_h = 116; 395 par->borderstart_v = 44; 396 } else { 397 /* NTSC video output */ 398 par->borderstart_h = 126; 399 par->borderstart_v = 18; 400 } 401 } else { 402 /* VGA mode */ 403 /* XXX: What else needs to be checked? */ 404 /* 405 * XXX: We have a little freedom in VGA modes, what ranges 406 * should be here (i.e. hsync/vsync totals, etc.)? 407 */ 408 par->borderstart_h = 126; 409 par->borderstart_v = 40; 410 } 411 412 /* Calculate the remainding offsets */ 413 par->diwstart_h = par->borderstart_h + var->left_margin; 414 par->diwstart_v = par->borderstart_v + var->upper_margin; 415 par->borderstop_h = par->diwstart_h + var->xres + 416 var->right_margin; 417 par->borderstop_v = par->diwstart_v + var->yres + 418 var->lower_margin; 419 420 if (!par->is_interlaced) 421 par->borderstop_v /= 2; 422 if (info->var.xres < 640) 423 par->is_lowres = 1; 424 425 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel); 426 par->disp_start = info->fix.smem_start + (line_length * var->yoffset) * line_length; 427 info->fix.line_length = line_length; 428 return 0; 429 } 430 431 static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 432 { 433 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 434 unsigned int vtotal, hsync_total; 435 unsigned long line_length; 436 437 if (var->pixclock != TV_CLK && var->pixclock != VGA_CLK) { 438 pr_debug("Invalid pixclock value %d\n", var->pixclock); 439 return -EINVAL; 440 } 441 442 if (var->xres < 320) 443 var->xres = 320; 444 if (var->yres < 240) 445 var->yres = 240; 446 if (var->xres_virtual < var->xres) 447 var->xres_virtual = var->xres; 448 if (var->yres_virtual < var->yres) 449 var->yres_virtual = var->yres; 450 451 if (var->bits_per_pixel <= 16) 452 var->bits_per_pixel = 16; 453 else if (var->bits_per_pixel <= 24) 454 var->bits_per_pixel = 24; 455 else if (var->bits_per_pixel <= 32) 456 var->bits_per_pixel = 32; 457 458 set_color_bitfields(var); 459 460 if (var->vmode & FB_VMODE_YWRAP) { 461 if (var->xoffset || var->yoffset >= var->yres_virtual) { 462 var->xoffset = var->yoffset = 0; 463 } else { 464 if (var->xoffset > var->xres_virtual - var->xres || 465 var->yoffset > var->yres_virtual - var->yres) 466 var->xoffset = var->yoffset = 0; 467 } 468 } else { 469 var->xoffset = var->yoffset = 0; 470 } 471 472 /* 473 * XXX: Need to be more creative with this (i.e. allow doublecan for 474 * PAL/NTSC output). 475 */ 476 if (var->yres < 480 && video_output == VO_VGA) 477 var->vmode |= FB_VMODE_DOUBLE; 478 479 if (video_output != VO_VGA) { 480 var->sync |= FB_SYNC_BROADCAST; 481 var->vmode |= FB_VMODE_INTERLACED; 482 } else { 483 var->sync &= ~FB_SYNC_BROADCAST; 484 var->vmode &= ~FB_VMODE_INTERLACED; 485 var->vmode |= FB_VMODE_NONINTERLACED; 486 } 487 488 if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_TEST) { 489 var->right_margin = par->borderstop_h - 490 (par->diwstart_h + var->xres); 491 var->left_margin = par->diwstart_h - par->borderstart_h; 492 var->hsync_len = par->borderstart_h + 493 (par->hsync_total - par->borderstop_h); 494 495 var->upper_margin = par->diwstart_v - par->borderstart_v; 496 var->lower_margin = par->borderstop_v - 497 (par->diwstart_v + var->yres); 498 var->vsync_len = par->borderstop_v + 499 (par->vsync_total - par->borderstop_v); 500 } 501 502 hsync_total = var->left_margin + var->xres + var->right_margin + 503 var->hsync_len; 504 vtotal = var->upper_margin + var->yres + var->lower_margin + 505 var->vsync_len; 506 507 if (var->sync & FB_SYNC_BROADCAST) { 508 if (var->vmode & FB_VMODE_INTERLACED) 509 vtotal /= 2; 510 if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) { 511 /* PAL video output */ 512 /* XXX: Should be using a range here ... ? */ 513 if (hsync_total != PAL_HTOTAL) { 514 pr_debug("invalid hsync total for PAL\n"); 515 return -EINVAL; 516 } 517 } else { 518 /* NTSC video output */ 519 if (hsync_total != NTSC_HTOTAL) { 520 pr_debug("invalid hsync total for NTSC\n"); 521 return -EINVAL; 522 } 523 } 524 } 525 526 /* Check memory sizes */ 527 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel); 528 if (line_length * var->yres_virtual > info->fix.smem_len) 529 return -ENOMEM; 530 531 return 0; 532 } 533 534 static void pvr2_update_display(struct fb_info *info) 535 { 536 struct pvr2fb_par *par = (struct pvr2fb_par *) info->par; 537 struct fb_var_screeninfo *var = &info->var; 538 539 /* Update the start address of the display image */ 540 fb_writel(par->disp_start, DISP_DIWADDRL); 541 fb_writel(par->disp_start + 542 get_line_length(var->xoffset+var->xres, var->bits_per_pixel), 543 DISP_DIWADDRS); 544 } 545 546 /* 547 * Initialize the video mode. Currently, the 16bpp and 24bpp modes aren't 548 * very stable. It's probably due to the fact that a lot of the 2D video 549 * registers are still undocumented. 550 */ 551 552 static void pvr2_init_display(struct fb_info *info) 553 { 554 struct pvr2fb_par *par = (struct pvr2fb_par *) info->par; 555 struct fb_var_screeninfo *var = &info->var; 556 unsigned int diw_height, diw_width, diw_modulo = 1; 557 unsigned int bytesperpixel = var->bits_per_pixel >> 3; 558 559 /* hsync and vsync totals */ 560 fb_writel((par->vsync_total << 16) | par->hsync_total, DISP_SYNCSIZE); 561 562 /* column height, modulo, row width */ 563 /* since we're "panning" within vram, we need to offset things based 564 * on the offset from the virtual x start to our real gfx. */ 565 if (video_output != VO_VGA && par->is_interlaced) 566 diw_modulo += info->fix.line_length / 4; 567 diw_height = (par->is_interlaced ? var->yres / 2 : var->yres); 568 diw_width = get_line_length(var->xres, var->bits_per_pixel) / 4; 569 fb_writel((diw_modulo << 20) | (--diw_height << 10) | --diw_width, 570 DISP_DIWSIZE); 571 572 /* display address, long and short fields */ 573 fb_writel(par->disp_start, DISP_DIWADDRL); 574 fb_writel(par->disp_start + 575 get_line_length(var->xoffset+var->xres, var->bits_per_pixel), 576 DISP_DIWADDRS); 577 578 /* border horizontal, border vertical, border color */ 579 fb_writel((par->borderstart_h << 16) | par->borderstop_h, DISP_BRDRHORZ); 580 fb_writel((par->borderstart_v << 16) | par->borderstop_v, DISP_BRDRVERT); 581 fb_writel(0, DISP_BRDRCOLR); 582 583 /* display window start position */ 584 fb_writel(par->diwstart_h, DISP_DIWHSTRT); 585 fb_writel((par->diwstart_v << 16) | par->diwstart_v, DISP_DIWVSTRT); 586 587 /* misc. settings */ 588 fb_writel((0x16 << 16) | par->is_lowres, DISP_DIWCONF); 589 590 /* clock doubler (for VGA), scan doubler, display enable */ 591 fb_writel(((video_output == VO_VGA) << 23) | 592 (par->is_doublescan << 1) | 1, DISP_DIWMODE); 593 594 /* bits per pixel */ 595 fb_writel(fb_readl(DISP_DIWMODE) | (--bytesperpixel << 2), DISP_DIWMODE); 596 fb_writel(bytesperpixel << 2, DISP_PIXDEPTH); 597 598 /* video enable, color sync, interlace, 599 * hsync and vsync polarity (currently unused) */ 600 fb_writel(0x100 | ((par->is_interlaced /*|4*/) << 4), DISP_SYNCCONF); 601 } 602 603 /* Simulate blanking by making the border cover the entire screen */ 604 605 #define BLANK_BIT (1<<3) 606 607 static void pvr2_do_blank(void) 608 { 609 struct pvr2fb_par *par = currentpar; 610 unsigned long diwconf; 611 612 diwconf = fb_readl(DISP_DIWCONF); 613 if (do_blank > 0) 614 fb_writel(diwconf | BLANK_BIT, DISP_DIWCONF); 615 else 616 fb_writel(diwconf & ~BLANK_BIT, DISP_DIWCONF); 617 618 is_blanked = do_blank > 0 ? do_blank : 0; 619 } 620 621 static irqreturn_t __maybe_unused pvr2fb_interrupt(int irq, void *dev_id) 622 { 623 struct fb_info *info = dev_id; 624 625 if (do_vmode_pan || do_vmode_full) 626 pvr2_update_display(info); 627 if (do_vmode_full) 628 pvr2_init_display(info); 629 if (do_vmode_pan) 630 do_vmode_pan = 0; 631 if (do_vmode_full) 632 do_vmode_full = 0; 633 if (do_blank) { 634 pvr2_do_blank(); 635 do_blank = 0; 636 } 637 return IRQ_HANDLED; 638 } 639 640 #ifdef CONFIG_PVR2_DMA 641 static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, 642 size_t count, loff_t *ppos) 643 { 644 unsigned long dst, start, end, len; 645 unsigned int nr_pages; 646 struct page **pages; 647 int ret, i; 648 649 nr_pages = (count + PAGE_SIZE - 1) >> PAGE_SHIFT; 650 651 pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_KERNEL); 652 if (!pages) 653 return -ENOMEM; 654 655 ret = pin_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages); 656 if (ret < nr_pages) { 657 if (ret < 0) { 658 /* 659 * Clamp the unsigned nr_pages to zero so that the 660 * error handling works. And leave ret at whatever 661 * -errno value was returned from GUP. 662 */ 663 nr_pages = 0; 664 } else { 665 nr_pages = ret; 666 /* 667 * Use -EINVAL to represent a mildly desperate guess at 668 * why we got fewer pages (maybe even zero pages) than 669 * requested. 670 */ 671 ret = -EINVAL; 672 } 673 goto out_unmap; 674 } 675 676 dma_configure_channel(shdma, 0x12c1); 677 678 dst = (unsigned long)fb_info->screen_base + *ppos; 679 start = (unsigned long)page_address(pages[0]); 680 end = (unsigned long)page_address(pages[nr_pages]); 681 len = nr_pages << PAGE_SHIFT; 682 683 /* Half-assed contig check */ 684 if (start + len == end) { 685 /* As we do this in one shot, it's either all or nothing.. */ 686 if ((*ppos + len) > fb_info->fix.smem_len) { 687 ret = -ENOSPC; 688 goto out_unmap; 689 } 690 691 dma_write(shdma, start, 0, len); 692 dma_write(pvr2dma, 0, dst, len); 693 dma_wait_for_completion(pvr2dma); 694 695 goto out; 696 } 697 698 /* Not contiguous, writeout per-page instead.. */ 699 for (i = 0; i < nr_pages; i++, dst += PAGE_SIZE) { 700 if ((*ppos + (i << PAGE_SHIFT)) > fb_info->fix.smem_len) { 701 ret = -ENOSPC; 702 goto out_unmap; 703 } 704 705 dma_write_page(shdma, (unsigned long)page_address(pages[i]), 0); 706 dma_write_page(pvr2dma, 0, dst); 707 dma_wait_for_completion(pvr2dma); 708 } 709 710 out: 711 *ppos += count; 712 ret = count; 713 714 out_unmap: 715 unpin_user_pages(pages, nr_pages); 716 kfree(pages); 717 718 return ret; 719 } 720 #endif /* CONFIG_PVR2_DMA */ 721 722 static const struct fb_ops pvr2fb_ops = { 723 .owner = THIS_MODULE, 724 .fb_setcolreg = pvr2fb_setcolreg, 725 .fb_blank = pvr2fb_blank, 726 .fb_check_var = pvr2fb_check_var, 727 .fb_set_par = pvr2fb_set_par, 728 #ifdef CONFIG_PVR2_DMA 729 .fb_write = pvr2fb_write, 730 #endif 731 .fb_fillrect = cfb_fillrect, 732 .fb_copyarea = cfb_copyarea, 733 .fb_imageblit = cfb_imageblit, 734 }; 735 736 #ifndef MODULE 737 static int pvr2_get_param_val(const struct pvr2_params *p, const char *s, 738 int size) 739 { 740 int i; 741 742 for (i = 0; i < size; i++) { 743 if (!strncasecmp(p[i].name, s, strlen(s))) 744 return p[i].val; 745 } 746 return -1; 747 } 748 #endif 749 750 static char *pvr2_get_param_name(const struct pvr2_params *p, int val, 751 int size) 752 { 753 int i; 754 755 for (i = 0; i < size; i++) { 756 if (p[i].val == val) 757 return p[i].name; 758 } 759 return NULL; 760 } 761 762 /** 763 * pvr2fb_common_init 764 * 765 * Common init code for the PVR2 chips. 766 * 767 * This mostly takes care of the common aspects of the fb setup and 768 * registration. It's expected that the board-specific init code has 769 * already setup pvr2_fix with something meaningful at this point. 770 * 771 * Device info reporting is also done here, as well as picking a sane 772 * default from the modedb. For board-specific modelines, simply define 773 * a per-board modedb. 774 * 775 * Also worth noting is that the cable and video output types are likely 776 * always going to be VGA for the PCI-based PVR2 boards, but we leave this 777 * in for flexibility anyways. Who knows, maybe someone has tv-out on a 778 * PCI-based version of these things ;-) 779 */ 780 static int __maybe_unused pvr2fb_common_init(void) 781 { 782 struct pvr2fb_par *par = currentpar; 783 unsigned long modememused, rev; 784 785 fb_info->screen_base = ioremap(pvr2_fix.smem_start, 786 pvr2_fix.smem_len); 787 788 if (!fb_info->screen_base) { 789 printk(KERN_ERR "pvr2fb: Failed to remap smem space\n"); 790 goto out_err; 791 } 792 793 par->mmio_base = ioremap(pvr2_fix.mmio_start, 794 pvr2_fix.mmio_len); 795 if (!par->mmio_base) { 796 printk(KERN_ERR "pvr2fb: Failed to remap mmio space\n"); 797 goto out_err; 798 } 799 800 fb_memset(fb_info->screen_base, 0, pvr2_fix.smem_len); 801 802 pvr2_fix.ypanstep = nopan ? 0 : 1; 803 pvr2_fix.ywrapstep = nowrap ? 0 : 1; 804 805 fb_info->fbops = &pvr2fb_ops; 806 fb_info->fix = pvr2_fix; 807 fb_info->par = currentpar; 808 fb_info->pseudo_palette = currentpar->palette; 809 fb_info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; 810 811 if (video_output == VO_VGA) 812 defmode = DEFMODE_VGA; 813 814 if (!mode_option) 815 mode_option = "640x480@60"; 816 817 if (!fb_find_mode(&fb_info->var, fb_info, mode_option, pvr2_modedb, 818 NUM_TOTAL_MODES, &pvr2_modedb[defmode], 16)) 819 fb_info->var = pvr2_var; 820 821 fb_alloc_cmap(&fb_info->cmap, 256, 0); 822 823 if (register_framebuffer(fb_info) < 0) 824 goto out_err; 825 /*Must write PIXDEPTH to register before anything is displayed - so force init */ 826 pvr2_init_display(fb_info); 827 828 modememused = get_line_length(fb_info->var.xres_virtual, 829 fb_info->var.bits_per_pixel); 830 modememused *= fb_info->var.yres_virtual; 831 832 rev = fb_readl(par->mmio_base + 0x04); 833 834 fb_info(fb_info, "%s (rev %ld.%ld) frame buffer device, using %ldk/%ldk of video memory\n", 835 fb_info->fix.id, (rev >> 4) & 0x0f, rev & 0x0f, 836 modememused >> 10, 837 (unsigned long)(fb_info->fix.smem_len >> 10)); 838 fb_info(fb_info, "Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n", 839 fb_info->var.xres, fb_info->var.yres, 840 fb_info->var.bits_per_pixel, 841 get_line_length(fb_info->var.xres, fb_info->var.bits_per_pixel), 842 pvr2_get_param_name(cables, cable_type, 3), 843 pvr2_get_param_name(outputs, video_output, 3)); 844 845 #ifdef CONFIG_SH_STORE_QUEUES 846 fb_notice(fb_info, "registering with SQ API\n"); 847 848 pvr2fb_map = sq_remap(fb_info->fix.smem_start, fb_info->fix.smem_len, 849 fb_info->fix.id, PAGE_SHARED); 850 851 fb_notice(fb_info, "Mapped video memory to SQ addr 0x%lx\n", 852 pvr2fb_map); 853 #endif 854 855 return 0; 856 857 out_err: 858 if (fb_info->screen_base) 859 iounmap(fb_info->screen_base); 860 if (par->mmio_base) 861 iounmap(par->mmio_base); 862 863 return -ENXIO; 864 } 865 866 #ifdef CONFIG_SH_DREAMCAST 867 static int __init pvr2fb_dc_init(void) 868 { 869 if (!mach_is_dreamcast()) 870 return -ENXIO; 871 872 /* Make a guess at the monitor based on the attached cable */ 873 if (pvr2_init_cable() == CT_VGA) { 874 fb_info->monspecs.hfmin = 30000; 875 fb_info->monspecs.hfmax = 70000; 876 fb_info->monspecs.vfmin = 60; 877 fb_info->monspecs.vfmax = 60; 878 } else { 879 /* Not VGA, using a TV (taken from acornfb) */ 880 fb_info->monspecs.hfmin = 15469; 881 fb_info->monspecs.hfmax = 15781; 882 fb_info->monspecs.vfmin = 49; 883 fb_info->monspecs.vfmax = 51; 884 } 885 886 /* 887 * XXX: This needs to pull default video output via BIOS or other means 888 */ 889 if (video_output < 0) { 890 if (cable_type == CT_VGA) { 891 video_output = VO_VGA; 892 } else { 893 video_output = VO_NTSC; 894 } 895 } 896 897 /* 898 * Nothing exciting about the DC PVR2 .. only a measly 8MiB. 899 */ 900 pvr2_fix.smem_start = 0xa5000000; /* RAM starts here */ 901 pvr2_fix.smem_len = 8 << 20; 902 903 pvr2_fix.mmio_start = 0xa05f8000; /* registers start here */ 904 pvr2_fix.mmio_len = 0x2000; 905 906 if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, IRQF_SHARED, 907 "pvr2 VBL handler", fb_info)) { 908 return -EBUSY; 909 } 910 911 #ifdef CONFIG_PVR2_DMA 912 if (request_dma(pvr2dma, "pvr2") != 0) { 913 free_irq(HW_EVENT_VSYNC, fb_info); 914 return -EBUSY; 915 } 916 #endif 917 918 return pvr2fb_common_init(); 919 } 920 921 static void pvr2fb_dc_exit(void) 922 { 923 if (fb_info->screen_base) { 924 iounmap(fb_info->screen_base); 925 fb_info->screen_base = NULL; 926 } 927 if (currentpar->mmio_base) { 928 iounmap(currentpar->mmio_base); 929 currentpar->mmio_base = NULL; 930 } 931 932 free_irq(HW_EVENT_VSYNC, fb_info); 933 #ifdef CONFIG_PVR2_DMA 934 free_dma(pvr2dma); 935 #endif 936 } 937 #endif /* CONFIG_SH_DREAMCAST */ 938 939 #ifdef CONFIG_PCI 940 static int pvr2fb_pci_probe(struct pci_dev *pdev, 941 const struct pci_device_id *ent) 942 { 943 int ret; 944 945 ret = pci_enable_device(pdev); 946 if (ret) { 947 printk(KERN_ERR "pvr2fb: PCI enable failed\n"); 948 return ret; 949 } 950 951 ret = pci_request_regions(pdev, "pvr2fb"); 952 if (ret) { 953 printk(KERN_ERR "pvr2fb: PCI request regions failed\n"); 954 return ret; 955 } 956 957 /* 958 * Slightly more exciting than the DC PVR2 .. 16MiB! 959 */ 960 pvr2_fix.smem_start = pci_resource_start(pdev, 0); 961 pvr2_fix.smem_len = pci_resource_len(pdev, 0); 962 963 pvr2_fix.mmio_start = pci_resource_start(pdev, 1); 964 pvr2_fix.mmio_len = pci_resource_len(pdev, 1); 965 966 fb_info->device = &pdev->dev; 967 968 return pvr2fb_common_init(); 969 } 970 971 static void pvr2fb_pci_remove(struct pci_dev *pdev) 972 { 973 if (fb_info->screen_base) { 974 iounmap(fb_info->screen_base); 975 fb_info->screen_base = NULL; 976 } 977 if (currentpar->mmio_base) { 978 iounmap(currentpar->mmio_base); 979 currentpar->mmio_base = NULL; 980 } 981 982 pci_release_regions(pdev); 983 } 984 985 static const struct pci_device_id pvr2fb_pci_tbl[] = { 986 { PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NEON250, 987 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 988 { 0, }, 989 }; 990 991 MODULE_DEVICE_TABLE(pci, pvr2fb_pci_tbl); 992 993 static struct pci_driver pvr2fb_pci_driver = { 994 .name = "pvr2fb", 995 .id_table = pvr2fb_pci_tbl, 996 .probe = pvr2fb_pci_probe, 997 .remove = pvr2fb_pci_remove, 998 }; 999 1000 static int __init pvr2fb_pci_init(void) 1001 { 1002 return pci_register_driver(&pvr2fb_pci_driver); 1003 } 1004 1005 static void pvr2fb_pci_exit(void) 1006 { 1007 pci_unregister_driver(&pvr2fb_pci_driver); 1008 } 1009 #endif /* CONFIG_PCI */ 1010 1011 /* 1012 * Parse command arguments. Supported arguments are: 1013 * inverse Use inverse color maps 1014 * cable:composite|rgb|vga Override the video cable type 1015 * output:NTSC|PAL|VGA Override the video output format 1016 * 1017 * <xres>x<yres>[-<bpp>][@<refresh>] or, 1018 * <name>[-<bpp>][@<refresh>] Startup using this video mode 1019 */ 1020 1021 #ifndef MODULE 1022 static int __init pvr2fb_setup(char *options) 1023 { 1024 char *this_opt; 1025 char cable_arg[80]; 1026 char output_arg[80]; 1027 1028 if (!options || !*options) 1029 return 0; 1030 1031 cable_arg[0] = output_arg[0] = 0; 1032 1033 while ((this_opt = strsep(&options, ","))) { 1034 if (!*this_opt) 1035 continue; 1036 if (!strcmp(this_opt, "inverse")) { 1037 fb_invert_cmaps(); 1038 } else if (!strncmp(this_opt, "cable:", 6)) { 1039 strcpy(cable_arg, this_opt + 6); 1040 } else if (!strncmp(this_opt, "output:", 7)) { 1041 strcpy(output_arg, this_opt + 7); 1042 } else if (!strncmp(this_opt, "nopan", 5)) { 1043 nopan = 1; 1044 } else if (!strncmp(this_opt, "nowrap", 6)) { 1045 nowrap = 1; 1046 } else { 1047 mode_option = this_opt; 1048 } 1049 } 1050 1051 if (*cable_arg) 1052 cable_type = pvr2_get_param_val(cables, cable_arg, 3); 1053 if (*output_arg) 1054 video_output = pvr2_get_param_val(outputs, output_arg, 3); 1055 1056 return 0; 1057 } 1058 #endif 1059 1060 static struct pvr2_board { 1061 int (*init)(void); 1062 void (*exit)(void); 1063 char name[16]; 1064 } board_driver[] __refdata = { 1065 #ifdef CONFIG_SH_DREAMCAST 1066 { pvr2fb_dc_init, pvr2fb_dc_exit, "Sega DC PVR2" }, 1067 #endif 1068 #ifdef CONFIG_PCI 1069 { pvr2fb_pci_init, pvr2fb_pci_exit, "PCI PVR2" }, 1070 #endif 1071 { 0, }, 1072 }; 1073 1074 static int __init pvr2fb_init(void) 1075 { 1076 int i, ret = -ENODEV; 1077 1078 #ifndef MODULE 1079 char *option = NULL; 1080 1081 if (fb_get_options("pvr2fb", &option)) 1082 return -ENODEV; 1083 pvr2fb_setup(option); 1084 #endif 1085 1086 fb_info = framebuffer_alloc(sizeof(struct pvr2fb_par), NULL); 1087 if (!fb_info) 1088 return -ENOMEM; 1089 1090 currentpar = fb_info->par; 1091 1092 for (i = 0; i < ARRAY_SIZE(board_driver); i++) { 1093 struct pvr2_board *pvr_board = board_driver + i; 1094 1095 if (!pvr_board->init) 1096 continue; 1097 1098 ret = pvr_board->init(); 1099 1100 if (ret != 0) { 1101 printk(KERN_ERR "pvr2fb: Failed init of %s device\n", 1102 pvr_board->name); 1103 framebuffer_release(fb_info); 1104 break; 1105 } 1106 } 1107 1108 return ret; 1109 } 1110 1111 static void __exit pvr2fb_exit(void) 1112 { 1113 int i; 1114 1115 for (i = 0; i < ARRAY_SIZE(board_driver); i++) { 1116 struct pvr2_board *pvr_board = board_driver + i; 1117 1118 if (pvr_board->exit) 1119 pvr_board->exit(); 1120 } 1121 1122 #ifdef CONFIG_SH_STORE_QUEUES 1123 sq_unmap(pvr2fb_map); 1124 #endif 1125 1126 unregister_framebuffer(fb_info); 1127 framebuffer_release(fb_info); 1128 } 1129 1130 module_init(pvr2fb_init); 1131 module_exit(pvr2fb_exit); 1132 1133 MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, M. R. Brown <mrbrown@0xd6.org>"); 1134 MODULE_DESCRIPTION("Framebuffer driver for NEC PowerVR 2 based graphics boards"); 1135 MODULE_LICENSE("GPL"); 1136