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pvr2fb.c
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linux-6.19.14/drivers/video/fbdev/pvr2fb.c
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/aperture.h> 49#include <linux/module.h> 50#include <linux/kernel.h> 51#include <linux/errno.h> 52#include <linux/string.h> 53#include <linux/mm.h> 54#include <linux/slab.h> 55#include <linux/delay.h> 56#include <linux/interrupt.h> 57#include <linux/fb.h> 58#include <linux/init.h> 59#include <linux/pci.h> 60 61#ifdef CONFIG_SH_DREAMCAST 62#include <asm/machvec.h> 63#include <mach-dreamcast/mach/sysasic.h> 64#endif 65 66#ifdef CONFIG_PVR2_DMA 67#include <linux/pagemap.h> 68#include <mach/dma.h> 69#include <asm/dma.h> 70#endif 71 72#ifdef CONFIG_SH_STORE_QUEUES 73#include <linux/uaccess.h> 74#include <cpu/sq.h> 75#endif 76 77#ifndef PCI_DEVICE_ID_NEC_NEON250 78# define PCI_DEVICE_ID_NEC_NEON250 0x0067 79#endif 80 81/* 2D video registers */ 82#define DISP_BASE par->mmio_base 83#define DISP_BRDRCOLR (DISP_BASE + 0x40) 84#define DISP_DIWMODE (DISP_BASE + 0x44) 85#define DISP_DIWADDRL (DISP_BASE + 0x50) 86#define DISP_DIWADDRS (DISP_BASE + 0x54) 87#define DISP_DIWSIZE (DISP_BASE + 0x5c) 88#define DISP_SYNCCONF (DISP_BASE + 0xd0) 89#define DISP_BRDRHORZ (DISP_BASE + 0xd4) 90#define DISP_SYNCSIZE (DISP_BASE + 0xd8) 91#define DISP_BRDRVERT (DISP_BASE + 0xdc) 92#define DISP_DIWCONF (DISP_BASE + 0xe8) 93#define DISP_DIWHSTRT (DISP_BASE + 0xec) 94#define DISP_DIWVSTRT (DISP_BASE + 0xf0) 95#define DISP_PIXDEPTH (DISP_BASE + 0x108) 96 97/* Pixel clocks, one for TV output, doubled for VGA output */ 98#define TV_CLK 74239 99#define VGA_CLK 37119 100 101/* This is for 60Hz - the VTOTAL is doubled for interlaced modes */ 102#define PAL_HTOTAL 863 103#define PAL_VTOTAL 312 104#define NTSC_HTOTAL 857 105#define NTSC_VTOTAL 262 106 107/* Supported cable types */ 108enum { CT_VGA, CT_NONE, CT_RGB, CT_COMPOSITE }; 109 110/* Supported video output types */ 111enum { VO_PAL, VO_NTSC, VO_VGA }; 112 113/* Supported palette types */ 114enum { PAL_ARGB1555, PAL_RGB565, PAL_ARGB4444, PAL_ARGB8888 }; 115 116struct pvr2_params { unsigned int val; char *name; }; 117static struct pvr2_params cables[] = { 118 { CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" }, 119}; 120 121static struct pvr2_params outputs[] = { 122 { VO_PAL, "PAL" }, { VO_NTSC, "NTSC" }, { VO_VGA, "VGA" }, 123}; 124 125/* 126 * This describes the current video mode 127 */ 128 129static struct pvr2fb_par { 130 unsigned int hsync_total; /* Clocks/line */ 131 unsigned int vsync_total; /* Lines/field */ 132 unsigned int borderstart_h; 133 unsigned int borderstop_h; 134 unsigned int borderstart_v; 135 unsigned int borderstop_v; 136 unsigned int diwstart_h; /* Horizontal offset of the display field */ 137 unsigned int diwstart_v; /* Vertical offset of the display field, for 138 interlaced modes, this is the long field */ 139 unsigned long disp_start; /* Address of image within VRAM */ 140 unsigned char is_interlaced; /* Is the display interlaced? */ 141 unsigned char is_doublescan; /* Are scanlines output twice? (doublescan) */ 142 unsigned char is_lowres; /* Is horizontal pixel-doubling enabled? */ 143 144 void __iomem *mmio_base; /* MMIO base */ 145 u32 palette[16]; 146} *currentpar; 147 148static struct fb_info *fb_info; 149 150static struct fb_fix_screeninfo pvr2_fix = { 151 .id = "NEC PowerVR2", 152 .type = FB_TYPE_PACKED_PIXELS, 153 .visual = FB_VISUAL_TRUECOLOR, 154 .ypanstep = 1, 155 .ywrapstep = 1, 156 .accel = FB_ACCEL_NONE, 157}; 158 159static const struct fb_var_screeninfo pvr2_var = { 160 .xres = 640, 161 .yres = 480, 162 .xres_virtual = 640, 163 .yres_virtual = 480, 164 .bits_per_pixel =16, 165 .red = { 11, 5, 0 }, 166 .green = { 5, 6, 0 }, 167 .blue = { 0, 5, 0 }, 168 .activate = FB_ACTIVATE_NOW, 169 .height = -1, 170 .width = -1, 171 .vmode = FB_VMODE_NONINTERLACED, 172}; 173 174static int cable_type = CT_VGA; 175static int video_output = VO_VGA; 176 177static int nopan = 0; 178static int nowrap = 1; 179 180/* 181 * We do all updating, blanking, etc. during the vertical retrace period 182 */ 183static unsigned int do_vmode_full = 0; /* Change the video mode */ 184static unsigned int do_vmode_pan = 0; /* Update the video mode */ 185static short do_blank = 0; /* (Un)Blank the screen */ 186 187static unsigned int is_blanked = 0; /* Is the screen blanked? */ 188 189#ifdef CONFIG_SH_STORE_QUEUES 190static unsigned long pvr2fb_map; 191#endif 192 193#ifdef CONFIG_PVR2_DMA 194static unsigned int shdma = PVR2_CASCADE_CHAN; 195static unsigned int pvr2dma = CONFIG_NR_ONCHIP_DMA_CHANNELS; 196#endif 197 198static struct fb_videomode pvr2_modedb[] = { 199 /* 200 * Broadcast video modes (PAL and NTSC). I'm unfamiliar with 201 * PAL-M and PAL-N, but from what I've read both modes parallel PAL and 202 * NTSC, so it shouldn't be a problem (I hope). 203 */ 204 205 { 206 /* 640x480 @ 60Hz interlaced (NTSC) */ 207 "ntsc_640x480i", 60, 640, 480, TV_CLK, 38, 33, 0, 18, 146, 26, 208 FB_SYNC_BROADCAST, FB_VMODE_INTERLACED | FB_VMODE_YWRAP 209 }, { 210 /* 640x240 @ 60Hz (NTSC) */ 211 /* XXX: Broken! Don't use... */ 212 "ntsc_640x240", 60, 640, 240, TV_CLK, 38, 33, 0, 0, 146, 22, 213 FB_SYNC_BROADCAST, FB_VMODE_YWRAP 214 }, { 215 /* 640x480 @ 60hz (VGA) */ 216 "vga_640x480", 60, 640, 480, VGA_CLK, 38, 33, 0, 18, 146, 26, 217 0, FB_VMODE_YWRAP 218 }, 219}; 220 221#define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb) 222 223#define DEFMODE_NTSC 0 224#define DEFMODE_PAL 0 225#define DEFMODE_VGA 2 226 227static int defmode = DEFMODE_NTSC; 228static char *mode_option = NULL; 229 230static inline void pvr2fb_set_pal_type(unsigned int type) 231{ 232 struct pvr2fb_par *par = (struct pvr2fb_par *)fb_info->par; 233 234 fb_writel(type, par->mmio_base + 0x108); 235} 236 237static inline void pvr2fb_set_pal_entry(struct pvr2fb_par *par, 238 unsigned int regno, 239 unsigned int val) 240{ 241 fb_writel(val, par->mmio_base + 0x1000 + (4 * regno)); 242} 243 244static int pvr2fb_blank(int blank, struct fb_info *info) 245{ 246 do_blank = blank ? blank : -1; 247 return 0; 248} 249 250static inline unsigned long get_line_length(int xres_virtual, int bpp) 251{ 252 return (unsigned long)((((xres_virtual*bpp)+31)&~31) >> 3); 253} 254 255static void set_color_bitfields(struct fb_var_screeninfo *var) 256{ 257 switch (var->bits_per_pixel) { 258 case 16: /* RGB 565 */ 259 pvr2fb_set_pal_type(PAL_RGB565); 260 var->red.offset = 11; var->red.length = 5; 261 var->green.offset = 5; var->green.length = 6; 262 var->blue.offset = 0; var->blue.length = 5; 263 var->transp.offset = 0; var->transp.length = 0; 264 break; 265 case 24: /* RGB 888 */ 266 var->red.offset = 16; var->red.length = 8; 267 var->green.offset = 8; var->green.length = 8; 268 var->blue.offset = 0; var->blue.length = 8; 269 var->transp.offset = 0; var->transp.length = 0; 270 break; 271 case 32: /* ARGB 8888 */ 272 pvr2fb_set_pal_type(PAL_ARGB8888); 273 var->red.offset = 16; var->red.length = 8; 274 var->green.offset = 8; var->green.length = 8; 275 var->blue.offset = 0; var->blue.length = 8; 276 var->transp.offset = 24; var->transp.length = 8; 277 break; 278 } 279} 280 281static int pvr2fb_setcolreg(unsigned int regno, unsigned int red, 282 unsigned int green, unsigned int blue, 283 unsigned int transp, struct fb_info *info) 284{ 285 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 286 unsigned int tmp; 287 288 if (regno > info->cmap.len) 289 return 1; 290 291 /* 292 * We only support the hardware palette for 16 and 32bpp. It's also 293 * expected that the palette format has been set by the time we get 294 * here, so we don't waste time setting it again. 295 */ 296 switch (info->var.bits_per_pixel) { 297 case 16: /* RGB 565 */ 298 tmp = (red & 0xf800) | 299 ((green & 0xfc00) >> 5) | 300 ((blue & 0xf800) >> 11); 301 302 pvr2fb_set_pal_entry(par, regno, tmp); 303 break; 304 case 24: /* RGB 888 */ 305 red >>= 8; green >>= 8; blue >>= 8; 306 tmp = (red << 16) | (green << 8) | blue; 307 break; 308 case 32: /* ARGB 8888 */ 309 red >>= 8; green >>= 8; blue >>= 8; 310 tmp = (transp << 24) | (red << 16) | (green << 8) | blue; 311 312 pvr2fb_set_pal_entry(par, regno, tmp); 313 break; 314 default: 315 pr_debug("Invalid bit depth %d?!?\n", info->var.bits_per_pixel); 316 return 1; 317 } 318 319 if (regno < 16) 320 ((u32*)(info->pseudo_palette))[regno] = tmp; 321 322 return 0; 323} 324 325/* 326 * Determine the cable type and initialize the cable output format. Don't do 327 * anything if the cable type has been overidden (via "cable:XX"). 328 */ 329 330#define PCTRA ((void __iomem *)0xff80002c) 331#define PDTRA ((void __iomem *)0xff800030) 332#define VOUTC ((void __iomem *)0xa0702c00) 333 334static int pvr2_init_cable(void) 335{ 336 if (cable_type < 0) { 337 fb_writel((fb_readl(PCTRA) & 0xfff0ffff) | 0x000a0000, 338 PCTRA); 339 cable_type = (fb_readw(PDTRA) >> 8) & 3; 340 } 341 342 /* Now select the output format (either composite or other) */ 343 /* XXX: Save the previous val first, as this reg is also AICA 344 related */ 345 if (cable_type == CT_COMPOSITE) 346 fb_writel(3 << 8, VOUTC); 347 else if (cable_type == CT_RGB) 348 fb_writel(1 << 9, VOUTC); 349 else 350 fb_writel(0, VOUTC); 351 352 return cable_type; 353} 354 355static int pvr2fb_set_par(struct fb_info *info) 356{ 357 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 358 struct fb_var_screeninfo *var = &info->var; 359 unsigned long line_length; 360 unsigned int vtotal; 361 362 /* 363 * XXX: It's possible that a user could use a VGA box, change the cable 364 * type in hardware (i.e. switch from VGA<->composite), then change 365 * modes (i.e. switching to another VT). If that happens we should 366 * automagically change the output format to cope, but currently I 367 * don't have a VGA box to make sure this works properly. 368 */ 369 cable_type = pvr2_init_cable(); 370 if (cable_type == CT_VGA && video_output != VO_VGA) 371 video_output = VO_VGA; 372 373 var->vmode &= FB_VMODE_MASK; 374 if (var->vmode & FB_VMODE_INTERLACED && video_output != VO_VGA) 375 par->is_interlaced = 1; 376 /* 377 * XXX: Need to be more creative with this (i.e. allow doublecan for 378 * PAL/NTSC output). 379 */ 380 if (var->vmode & FB_VMODE_DOUBLE && video_output == VO_VGA) 381 par->is_doublescan = 1; 382 383 par->hsync_total = var->left_margin + var->xres + var->right_margin + 384 var->hsync_len; 385 par->vsync_total = var->upper_margin + var->yres + var->lower_margin + 386 var->vsync_len; 387 388 if (var->sync & FB_SYNC_BROADCAST) { 389 vtotal = par->vsync_total; 390 if (par->is_interlaced) 391 vtotal /= 2; 392 if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) { 393 /* XXX: Check for start values here... */ 394 /* XXX: Check hardware for PAL-compatibility */ 395 par->borderstart_h = 116; 396 par->borderstart_v = 44; 397 } else { 398 /* NTSC video output */ 399 par->borderstart_h = 126; 400 par->borderstart_v = 18; 401 } 402 } else { 403 /* VGA mode */ 404 /* XXX: What else needs to be checked? */ 405 /* 406 * XXX: We have a little freedom in VGA modes, what ranges 407 * should be here (i.e. hsync/vsync totals, etc.)? 408 */ 409 par->borderstart_h = 126; 410 par->borderstart_v = 40; 411 } 412 413 /* Calculate the remainding offsets */ 414 par->diwstart_h = par->borderstart_h + var->left_margin; 415 par->diwstart_v = par->borderstart_v + var->upper_margin; 416 par->borderstop_h = par->diwstart_h + var->xres + 417 var->right_margin; 418 par->borderstop_v = par->diwstart_v + var->yres + 419 var->lower_margin; 420 421 if (!par->is_interlaced) 422 par->borderstop_v /= 2; 423 if (info->var.xres < 640) 424 par->is_lowres = 1; 425 426 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel); 427 par->disp_start = info->fix.smem_start + (line_length * var->yoffset) * line_length; 428 info->fix.line_length = line_length; 429 return 0; 430} 431 432static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 433{ 434 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 435 unsigned int vtotal, hsync_total; 436 unsigned long line_length; 437 438 if (var->pixclock != TV_CLK && var->pixclock != VGA_CLK) { 439 pr_debug("Invalid pixclock value %d\n", var->pixclock); 440 return -EINVAL; 441 } 442 443 if (var->xres < 320) 444 var->xres = 320; 445 if (var->yres < 240) 446 var->yres = 240; 447 if (var->xres_virtual < var->xres) 448 var->xres_virtual = var->xres; 449 if (var->yres_virtual < var->yres) 450 var->yres_virtual = var->yres; 451 452 if (var->bits_per_pixel <= 16) 453 var->bits_per_pixel = 16; 454 else if (var->bits_per_pixel <= 24) 455 var->bits_per_pixel = 24; 456 else if (var->bits_per_pixel <= 32) 457 var->bits_per_pixel = 32; 458 459 set_color_bitfields(var); 460 461 if (var->vmode & FB_VMODE_YWRAP) { 462 if (var->xoffset || var->yoffset >= var->yres_virtual) { 463 var->xoffset = var->yoffset = 0; 464 } else { 465 if (var->xoffset > var->xres_virtual - var->xres || 466 var->yoffset > var->yres_virtual - var->yres) 467 var->xoffset = var->yoffset = 0; 468 } 469 } else { 470 var->xoffset = var->yoffset = 0; 471 } 472 473 /* 474 * XXX: Need to be more creative with this (i.e. allow doublecan for 475 * PAL/NTSC output). 476 */ 477 if (var->yres < 480 && video_output == VO_VGA) 478 var->vmode |= FB_VMODE_DOUBLE; 479 480 if (video_output != VO_VGA) { 481 var->sync |= FB_SYNC_BROADCAST; 482 var->vmode |= FB_VMODE_INTERLACED; 483 } else { 484 var->sync &= ~FB_SYNC_BROADCAST; 485 var->vmode &= ~FB_VMODE_INTERLACED; 486 var->vmode |= FB_VMODE_NONINTERLACED; 487 } 488 489 if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_TEST) { 490 var->right_margin = par->borderstop_h - 491 (par->diwstart_h + var->xres); 492 var->left_margin = par->diwstart_h - par->borderstart_h; 493 var->hsync_len = par->borderstart_h + 494 (par->hsync_total - par->borderstop_h); 495 496 var->upper_margin = par->diwstart_v - par->borderstart_v; 497 var->lower_margin = par->borderstop_v - 498 (par->diwstart_v + var->yres); 499 var->vsync_len = par->borderstop_v + 500 (par->vsync_total - par->borderstop_v); 501 } 502 503 hsync_total = var->left_margin + var->xres + var->right_margin + 504 var->hsync_len; 505 vtotal = var->upper_margin + var->yres + var->lower_margin + 506 var->vsync_len; 507 508 if (var->sync & FB_SYNC_BROADCAST) { 509 if (var->vmode & FB_VMODE_INTERLACED) 510 vtotal /= 2; 511 if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) { 512 /* PAL video output */ 513 /* XXX: Should be using a range here ... ? */ 514 if (hsync_total != PAL_HTOTAL) { 515 pr_debug("invalid hsync total for PAL\n"); 516 return -EINVAL; 517 } 518 } else { 519 /* NTSC video output */ 520 if (hsync_total != NTSC_HTOTAL) { 521 pr_debug("invalid hsync total for NTSC\n"); 522 return -EINVAL; 523 } 524 } 525 } 526 527 /* Check memory sizes */ 528 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel); 529 if (line_length * var->yres_virtual > info->fix.smem_len) 530 return -ENOMEM; 531 532 return 0; 533} 534 535static void pvr2_update_display(struct fb_info *info) 536{ 537 struct pvr2fb_par *par = (struct pvr2fb_par *) info->par; 538 struct fb_var_screeninfo *var = &info->var; 539 540 /* Update the start address of the display image */ 541 fb_writel(par->disp_start, DISP_DIWADDRL); 542 fb_writel(par->disp_start + 543 get_line_length(var->xoffset+var->xres, var->bits_per_pixel), 544 DISP_DIWADDRS); 545} 546 547/* 548 * Initialize the video mode. Currently, the 16bpp and 24bpp modes aren't 549 * very stable. It's probably due to the fact that a lot of the 2D video 550 * registers are still undocumented. 551 */ 552 553static void pvr2_init_display(struct fb_info *info) 554{ 555 struct pvr2fb_par *par = (struct pvr2fb_par *) info->par; 556 struct fb_var_screeninfo *var = &info->var; 557 unsigned int diw_height, diw_width, diw_modulo = 1; 558 unsigned int bytesperpixel = var->bits_per_pixel >> 3; 559 560 /* hsync and vsync totals */ 561 fb_writel((par->vsync_total << 16) | par->hsync_total, DISP_SYNCSIZE); 562 563 /* column height, modulo, row width */ 564 /* since we're "panning" within vram, we need to offset things based 565 * on the offset from the virtual x start to our real gfx. */ 566 if (video_output != VO_VGA && par->is_interlaced) 567 diw_modulo += info->fix.line_length / 4; 568 diw_height = (par->is_interlaced ? var->yres / 2 : var->yres); 569 diw_width = get_line_length(var->xres, var->bits_per_pixel) / 4; 570 fb_writel((diw_modulo << 20) | (--diw_height << 10) | --diw_width, 571 DISP_DIWSIZE); 572 573 /* display address, long and short fields */ 574 fb_writel(par->disp_start, DISP_DIWADDRL); 575 fb_writel(par->disp_start + 576 get_line_length(var->xoffset+var->xres, var->bits_per_pixel), 577 DISP_DIWADDRS); 578 579 /* border horizontal, border vertical, border color */ 580 fb_writel((par->borderstart_h << 16) | par->borderstop_h, DISP_BRDRHORZ); 581 fb_writel((par->borderstart_v << 16) | par->borderstop_v, DISP_BRDRVERT); 582 fb_writel(0, DISP_BRDRCOLR); 583 584 /* display window start position */ 585 fb_writel(par->diwstart_h, DISP_DIWHSTRT); 586 fb_writel((par->diwstart_v << 16) | par->diwstart_v, DISP_DIWVSTRT); 587 588 /* misc. settings */ 589 fb_writel((0x16 << 16) | par->is_lowres, DISP_DIWCONF); 590 591 /* clock doubler (for VGA), scan doubler, display enable */ 592 fb_writel(((video_output == VO_VGA) << 23) | 593 (par->is_doublescan << 1) | 1, DISP_DIWMODE); 594 595 /* bits per pixel */ 596 fb_writel(fb_readl(DISP_DIWMODE) | (--bytesperpixel << 2), DISP_DIWMODE); 597 fb_writel(bytesperpixel << 2, DISP_PIXDEPTH); 598 599 /* video enable, color sync, interlace, 600 * hsync and vsync polarity (currently unused) */ 601 fb_writel(0x100 | ((par->is_interlaced /*|4*/) << 4), DISP_SYNCCONF); 602} 603 604/* Simulate blanking by making the border cover the entire screen */ 605 606#define BLANK_BIT (1<<3) 607 608static void pvr2_do_blank(void) 609{ 610 struct pvr2fb_par *par = currentpar; 611 unsigned long diwconf; 612 613 diwconf = fb_readl(DISP_DIWCONF); 614 if (do_blank > 0) 615 fb_writel(diwconf | BLANK_BIT, DISP_DIWCONF); 616 else 617 fb_writel(diwconf & ~BLANK_BIT, DISP_DIWCONF); 618 619 is_blanked = do_blank > 0 ? do_blank : 0; 620} 621 622static irqreturn_t __maybe_unused pvr2fb_interrupt(int irq, void *dev_id) 623{ 624 struct fb_info *info = dev_id; 625 626 if (do_vmode_pan || do_vmode_full) 627 pvr2_update_display(info); 628 if (do_vmode_full) 629 pvr2_init_display(info); 630 if (do_vmode_pan) 631 do_vmode_pan = 0; 632 if (do_vmode_full) 633 do_vmode_full = 0; 634 if (do_blank) { 635 pvr2_do_blank(); 636 do_blank = 0; 637 } 638 return IRQ_HANDLED; 639} 640 641#ifdef CONFIG_PVR2_DMA 642static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, 643 size_t count, loff_t *ppos) 644{ 645 unsigned long dst, start, end, len; 646 unsigned int nr_pages; 647 struct page **pages; 648 int ret, i; 649 650 if (!info->screen_base) 651 return -ENODEV; 652 653 nr_pages = (count + PAGE_SIZE - 1) >> PAGE_SHIFT; 654 655 pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_KERNEL); 656 if (!pages) 657 return -ENOMEM; 658 659 ret = pin_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages); 660 if (ret < nr_pages) { 661 if (ret < 0) { 662 /* 663 * Clamp the unsigned nr_pages to zero so that the 664 * error handling works. And leave ret at whatever 665 * -errno value was returned from GUP. 666 */ 667 nr_pages = 0; 668 } else { 669 nr_pages = ret; 670 /* 671 * Use -EINVAL to represent a mildly desperate guess at 672 * why we got fewer pages (maybe even zero pages) than 673 * requested. 674 */ 675 ret = -EINVAL; 676 } 677 goto out_unmap; 678 } 679 680 dma_configure_channel(shdma, 0x12c1); 681 682 dst = (unsigned long)fb_info->screen_base + *ppos; 683 start = (unsigned long)page_address(pages[0]); 684 end = (unsigned long)page_address(pages[nr_pages]); 685 len = nr_pages << PAGE_SHIFT; 686 687 /* Half-assed contig check */ 688 if (start + len == end) { 689 /* As we do this in one shot, it's either all or nothing.. */ 690 if ((*ppos + len) > fb_info->fix.smem_len) { 691 ret = -ENOSPC; 692 goto out_unmap; 693 } 694 695 dma_write(shdma, start, 0, len); 696 dma_write(pvr2dma, 0, dst, len); 697 dma_wait_for_completion(pvr2dma); 698 699 goto out; 700 } 701 702 /* Not contiguous, writeout per-page instead.. */ 703 for (i = 0; i < nr_pages; i++, dst += PAGE_SIZE) { 704 if ((*ppos + (i << PAGE_SHIFT)) > fb_info->fix.smem_len) { 705 ret = -ENOSPC; 706 goto out_unmap; 707 } 708 709 dma_write_page(shdma, (unsigned long)page_address(pages[i]), 0); 710 dma_write_page(pvr2dma, 0, dst); 711 dma_wait_for_completion(pvr2dma); 712 } 713 714out: 715 *ppos += count; 716 ret = count; 717 718out_unmap: 719 unpin_user_pages(pages, nr_pages); 720 kfree(pages); 721 722 return ret; 723} 724#endif /* CONFIG_PVR2_DMA */ 725 726static const struct fb_ops pvr2fb_ops = { 727 .owner = THIS_MODULE, 728#ifdef CONFIG_PVR2_DMA 729 .fb_read = fb_io_read, 730 .fb_write = pvr2fb_write, 731#else 732 __FB_DEFAULT_IOMEM_OPS_RDWR, 733#endif 734 .fb_setcolreg = pvr2fb_setcolreg, 735 .fb_blank = pvr2fb_blank, 736 __FB_DEFAULT_IOMEM_OPS_DRAW, 737 .fb_check_var = pvr2fb_check_var, 738 .fb_set_par = pvr2fb_set_par, 739 __FB_DEFAULT_IOMEM_OPS_MMAP, 740}; 741 742#ifndef MODULE 743static int pvr2_get_param_val(const struct pvr2_params *p, const char *s, 744 int size) 745{ 746 int i; 747 748 for (i = 0; i < size; i++) { 749 if (!strncasecmp(p[i].name, s, strlen(s))) 750 return p[i].val; 751 } 752 return -1; 753} 754#endif 755 756static char *pvr2_get_param_name(const struct pvr2_params *p, int val, 757 int size) 758{ 759 int i; 760 761 for (i = 0; i < size; i++) { 762 if (p[i].val == val) 763 return p[i].name; 764 } 765 return NULL; 766} 767 768/** 769 * pvr2fb_common_init 770 * 771 * Common init code for the PVR2 chips. 772 * 773 * This mostly takes care of the common aspects of the fb setup and 774 * registration. It's expected that the board-specific init code has 775 * already setup pvr2_fix with something meaningful at this point. 776 * 777 * Device info reporting is also done here, as well as picking a sane 778 * default from the modedb. For board-specific modelines, simply define 779 * a per-board modedb. 780 * 781 * Also worth noting is that the cable and video output types are likely 782 * always going to be VGA for the PCI-based PVR2 boards, but we leave this 783 * in for flexibility anyways. Who knows, maybe someone has tv-out on a 784 * PCI-based version of these things ;-) 785 */ 786static int __maybe_unused pvr2fb_common_init(void) 787{ 788 struct pvr2fb_par *par = currentpar; 789 unsigned long modememused, rev; 790 791 fb_info->screen_base = ioremap(pvr2_fix.smem_start, 792 pvr2_fix.smem_len); 793 794 if (!fb_info->screen_base) { 795 printk(KERN_ERR "pvr2fb: Failed to remap smem space\n"); 796 goto out_err; 797 } 798 799 par->mmio_base = ioremap(pvr2_fix.mmio_start, 800 pvr2_fix.mmio_len); 801 if (!par->mmio_base) { 802 printk(KERN_ERR "pvr2fb: Failed to remap mmio space\n"); 803 goto out_err; 804 } 805 806 fb_memset_io(fb_info->screen_base, 0, pvr2_fix.smem_len); 807 808 pvr2_fix.ypanstep = nopan ? 0 : 1; 809 pvr2_fix.ywrapstep = nowrap ? 0 : 1; 810 811 fb_info->fbops = &pvr2fb_ops; 812 fb_info->fix = pvr2_fix; 813 fb_info->par = currentpar; 814 fb_info->pseudo_palette = currentpar->palette; 815 fb_info->flags = FBINFO_HWACCEL_YPAN; 816 817 if (video_output == VO_VGA) 818 defmode = DEFMODE_VGA; 819 820 if (!mode_option) 821 mode_option = "640x480@60"; 822 823 if (!fb_find_mode(&fb_info->var, fb_info, mode_option, pvr2_modedb, 824 NUM_TOTAL_MODES, &pvr2_modedb[defmode], 16)) 825 fb_info->var = pvr2_var; 826 827 fb_alloc_cmap(&fb_info->cmap, 256, 0); 828 829 if (register_framebuffer(fb_info) < 0) 830 goto out_err; 831 /*Must write PIXDEPTH to register before anything is displayed - so force init */ 832 pvr2_init_display(fb_info); 833 834 modememused = get_line_length(fb_info->var.xres_virtual, 835 fb_info->var.bits_per_pixel); 836 modememused *= fb_info->var.yres_virtual; 837 838 rev = fb_readl(par->mmio_base + 0x04); 839 840 fb_info(fb_info, "%s (rev %ld.%ld) frame buffer device, using %ldk/%ldk of video memory\n", 841 fb_info->fix.id, (rev >> 4) & 0x0f, rev & 0x0f, 842 modememused >> 10, 843 (unsigned long)(fb_info->fix.smem_len >> 10)); 844 fb_info(fb_info, "Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n", 845 fb_info->var.xres, fb_info->var.yres, 846 fb_info->var.bits_per_pixel, 847 get_line_length(fb_info->var.xres, fb_info->var.bits_per_pixel), 848 pvr2_get_param_name(cables, cable_type, 3), 849 pvr2_get_param_name(outputs, video_output, 3)); 850 851#ifdef CONFIG_SH_STORE_QUEUES 852 fb_notice(fb_info, "registering with SQ API\n"); 853 854 pvr2fb_map = sq_remap(fb_info->fix.smem_start, fb_info->fix.smem_len, 855 fb_info->fix.id, PAGE_SHARED); 856 857 fb_notice(fb_info, "Mapped video memory to SQ addr 0x%lx\n", 858 pvr2fb_map); 859#endif 860 861 return 0; 862 863out_err: 864 if (fb_info->screen_base) 865 iounmap(fb_info->screen_base); 866 if (par->mmio_base) 867 iounmap(par->mmio_base); 868 869 return -ENXIO; 870} 871 872#ifdef CONFIG_SH_DREAMCAST 873static int __init pvr2fb_dc_init(void) 874{ 875 if (!mach_is_dreamcast()) 876 return -ENXIO; 877 878 /* Make a guess at the monitor based on the attached cable */ 879 if (pvr2_init_cable() == CT_VGA) { 880 fb_info->monspecs.hfmin = 30000; 881 fb_info->monspecs.hfmax = 70000; 882 fb_info->monspecs.vfmin = 60; 883 fb_info->monspecs.vfmax = 60; 884 } else { 885 /* Not VGA, using a TV (taken from acornfb) */ 886 fb_info->monspecs.hfmin = 15469; 887 fb_info->monspecs.hfmax = 15781; 888 fb_info->monspecs.vfmin = 49; 889 fb_info->monspecs.vfmax = 51; 890 } 891 892 /* 893 * XXX: This needs to pull default video output via BIOS or other means 894 */ 895 if (video_output < 0) { 896 if (cable_type == CT_VGA) { 897 video_output = VO_VGA; 898 } else { 899 video_output = VO_NTSC; 900 } 901 } 902 903 /* 904 * Nothing exciting about the DC PVR2 .. only a measly 8MiB. 905 */ 906 pvr2_fix.smem_start = 0xa5000000; /* RAM starts here */ 907 pvr2_fix.smem_len = 8 << 20; 908 909 pvr2_fix.mmio_start = 0xa05f8000; /* registers start here */ 910 pvr2_fix.mmio_len = 0x2000; 911 912 if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, IRQF_SHARED, 913 "pvr2 VBL handler", fb_info)) { 914 return -EBUSY; 915 } 916 917#ifdef CONFIG_PVR2_DMA 918 if (request_dma(pvr2dma, "pvr2") != 0) { 919 free_irq(HW_EVENT_VSYNC, fb_info); 920 return -EBUSY; 921 } 922#endif 923 924 return pvr2fb_common_init(); 925} 926 927static void pvr2fb_dc_exit(void) 928{ 929 if (fb_info->screen_base) { 930 iounmap(fb_info->screen_base); 931 fb_info->screen_base = NULL; 932 } 933 if (currentpar->mmio_base) { 934 iounmap(currentpar->mmio_base); 935 currentpar->mmio_base = NULL; 936 } 937 938 free_irq(HW_EVENT_VSYNC, fb_info); 939#ifdef CONFIG_PVR2_DMA 940 free_dma(pvr2dma); 941#endif 942} 943#endif /* CONFIG_SH_DREAMCAST */ 944 945#ifdef CONFIG_PCI 946static int pvr2fb_pci_probe(struct pci_dev *pdev, 947 const struct pci_device_id *ent) 948{ 949 int ret; 950 951 ret = aperture_remove_conflicting_pci_devices(pdev, "pvrfb"); 952 if (ret) 953 return ret; 954 955 ret = pci_enable_device(pdev); 956 if (ret) { 957 printk(KERN_ERR "pvr2fb: PCI enable failed\n"); 958 return ret; 959 } 960 961 ret = pci_request_regions(pdev, "pvr2fb"); 962 if (ret) { 963 printk(KERN_ERR "pvr2fb: PCI request regions failed\n"); 964 return ret; 965 } 966 967 /* 968 * Slightly more exciting than the DC PVR2 .. 16MiB! 969 */ 970 pvr2_fix.smem_start = pci_resource_start(pdev, 0); 971 pvr2_fix.smem_len = pci_resource_len(pdev, 0); 972 973 pvr2_fix.mmio_start = pci_resource_start(pdev, 1); 974 pvr2_fix.mmio_len = pci_resource_len(pdev, 1); 975 976 fb_info->device = &pdev->dev; 977 978 return pvr2fb_common_init(); 979} 980 981static void pvr2fb_pci_remove(struct pci_dev *pdev) 982{ 983 if (fb_info->screen_base) { 984 iounmap(fb_info->screen_base); 985 fb_info->screen_base = NULL; 986 } 987 if (currentpar->mmio_base) { 988 iounmap(currentpar->mmio_base); 989 currentpar->mmio_base = NULL; 990 } 991 992 pci_release_regions(pdev); 993} 994 995static const struct pci_device_id pvr2fb_pci_tbl[] = { 996 { PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NEON250, 997 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 998 { 0, }, 999}; 1000 1001MODULE_DEVICE_TABLE(pci, pvr2fb_pci_tbl); 1002 1003static struct pci_driver pvr2fb_pci_driver = { 1004 .name = "pvr2fb", 1005 .id_table = pvr2fb_pci_tbl, 1006 .probe = pvr2fb_pci_probe, 1007 .remove = pvr2fb_pci_remove, 1008}; 1009 1010static int __init pvr2fb_pci_init(void) 1011{ 1012 return pci_register_driver(&pvr2fb_pci_driver); 1013} 1014 1015static void pvr2fb_pci_exit(void) 1016{ 1017 pci_unregister_driver(&pvr2fb_pci_driver); 1018} 1019#endif /* CONFIG_PCI */ 1020 1021/* 1022 * Parse command arguments. Supported arguments are: 1023 * inverse Use inverse color maps 1024 * cable:composite|rgb|vga Override the video cable type 1025 * output:NTSC|PAL|VGA Override the video output format 1026 * 1027 * <xres>x<yres>[-<bpp>][@<refresh>] or, 1028 * <name>[-<bpp>][@<refresh>] Startup using this video mode 1029 */ 1030 1031#ifndef MODULE 1032static int __init pvr2fb_setup(char *options) 1033{ 1034 char *this_opt; 1035 char cable_arg[80]; 1036 char output_arg[80]; 1037 1038 if (!options || !*options) 1039 return 0; 1040 1041 cable_arg[0] = output_arg[0] = 0; 1042 1043 while ((this_opt = strsep(&options, ","))) { 1044 if (!*this_opt) 1045 continue; 1046 if (!strcmp(this_opt, "inverse")) { 1047 fb_invert_cmaps(); 1048 } else if (!strncmp(this_opt, "cable:", 6)) { 1049 strcpy(cable_arg, this_opt + 6); 1050 } else if (!strncmp(this_opt, "output:", 7)) { 1051 strcpy(output_arg, this_opt + 7); 1052 } else if (!strncmp(this_opt, "nopan", 5)) { 1053 nopan = 1; 1054 } else if (!strncmp(this_opt, "nowrap", 6)) { 1055 nowrap = 1; 1056 } else { 1057 mode_option = this_opt; 1058 } 1059 } 1060 1061 if (*cable_arg) 1062 cable_type = pvr2_get_param_val(cables, cable_arg, 3); 1063 if (*output_arg) 1064 video_output = pvr2_get_param_val(outputs, output_arg, 3); 1065 1066 return 0; 1067} 1068#endif 1069 1070static struct pvr2_board { 1071 int (*init)(void); 1072 void (*exit)(void); 1073 char name[16]; 1074} board_driver[] __refdata = { 1075#ifdef CONFIG_SH_DREAMCAST 1076 { pvr2fb_dc_init, pvr2fb_dc_exit, "Sega DC PVR2" }, 1077#endif 1078#ifdef CONFIG_PCI 1079 { pvr2fb_pci_init, pvr2fb_pci_exit, "PCI PVR2" }, 1080#endif 1081 { 0, }, 1082}; 1083 1084static int __init pvr2fb_init(void) 1085{ 1086 int i, ret = -ENODEV; 1087 1088#ifndef MODULE 1089 char *option = NULL; 1090#endif 1091 1092 if (fb_modesetting_disabled("pvr2fb")) 1093 return -ENODEV; 1094 1095#ifndef MODULE 1096 if (fb_get_options("pvr2fb", &option)) 1097 return -ENODEV; 1098 pvr2fb_setup(option); 1099#endif 1100 1101 fb_info = framebuffer_alloc(sizeof(struct pvr2fb_par), NULL); 1102 if (!fb_info) 1103 return -ENOMEM; 1104 1105 currentpar = fb_info->par; 1106 1107 for (i = 0; i < ARRAY_SIZE(board_driver); i++) { 1108 struct pvr2_board *pvr_board = board_driver + i; 1109 1110 if (!pvr_board->init) 1111 continue; 1112 1113 ret = pvr_board->init(); 1114 1115 if (ret != 0) { 1116 printk(KERN_ERR "pvr2fb: Failed init of %s device\n", 1117 pvr_board->name); 1118 framebuffer_release(fb_info); 1119 break; 1120 } 1121 } 1122 1123 return ret; 1124} 1125 1126static void __exit pvr2fb_exit(void) 1127{ 1128 int i; 1129 1130 for (i = 0; i < ARRAY_SIZE(board_driver); i++) { 1131 struct pvr2_board *pvr_board = board_driver + i; 1132 1133 if (pvr_board->exit) 1134 pvr_board->exit(); 1135 } 1136 1137#ifdef CONFIG_SH_STORE_QUEUES 1138 sq_unmap(pvr2fb_map); 1139#endif 1140 1141 unregister_framebuffer(fb_info); 1142 framebuffer_release(fb_info); 1143} 1144 1145module_init(pvr2fb_init); 1146module_exit(pvr2fb_exit); 1147 1148MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, M. R. Brown <mrbrown@0xd6.org>"); 1149MODULE_DESCRIPTION("Framebuffer driver for NEC PowerVR 2 based graphics boards"); 1150MODULE_LICENSE("GPL");
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