1 /* 2 * drivers/video/pvr2fb.c 3 * 4 * Frame buffer and fbcon support for the NEC PowerVR2 found within the Sega 5 * Dreamcast. 6 * 7 * Copyright (c) 2001 M. R. Brown <mrbrown@0xd6.org> 8 * Copyright (c) 2001 - 2008 Paul Mundt <lethal@linux-sh.org> 9 * 10 * This driver is mostly based on the excellent amifb and vfb sources. It uses 11 * an odd scheme for converting hardware values to/from framebuffer values, 12 * here are some hacked-up formulas: 13 * 14 * The Dreamcast has screen offsets from each side of its four borders and 15 * the start offsets of the display window. I used these values to calculate 16 * 'pseudo' values (think of them as placeholders) for the fb video mode, so 17 * that when it came time to convert these values back into their hardware 18 * values, I could just add mode- specific offsets to get the correct mode 19 * settings: 20 * 21 * left_margin = diwstart_h - borderstart_h; 22 * right_margin = borderstop_h - (diwstart_h + xres); 23 * upper_margin = diwstart_v - borderstart_v; 24 * lower_margin = borderstop_v - (diwstart_h + yres); 25 * 26 * hsync_len = borderstart_h + (hsync_total - borderstop_h); 27 * vsync_len = borderstart_v + (vsync_total - borderstop_v); 28 * 29 * Then, when it's time to convert back to hardware settings, the only 30 * constants are the borderstart_* offsets, all other values are derived from 31 * the fb video mode: 32 * 33 * // PAL 34 * borderstart_h = 116; 35 * borderstart_v = 44; 36 * ... 37 * borderstop_h = borderstart_h + hsync_total - hsync_len; 38 * ... 39 * diwstart_v = borderstart_v - upper_margin; 40 * 41 * However, in the current implementation, the borderstart values haven't had 42 * the benefit of being fully researched, so some modes may be broken. 43 */ 44 45 #undef DEBUG 46 47 #include <linux/module.h> 48 #include <linux/kernel.h> 49 #include <linux/errno.h> 50 #include <linux/string.h> 51 #include <linux/mm.h> 52 #include <linux/slab.h> 53 #include <linux/delay.h> 54 #include <linux/interrupt.h> 55 #include <linux/fb.h> 56 #include <linux/init.h> 57 #include <linux/pci.h> 58 59 #ifdef CONFIG_SH_DREAMCAST 60 #include <asm/machvec.h> 61 #include <mach-dreamcast/mach/sysasic.h> 62 #endif 63 64 #ifdef CONFIG_PVR2_DMA 65 #include <linux/pagemap.h> 66 #include <mach/dma.h> 67 #include <asm/dma.h> 68 #endif 69 70 #ifdef CONFIG_SH_STORE_QUEUES 71 #include <linux/uaccess.h> 72 #include <cpu/sq.h> 73 #endif 74 75 #ifndef PCI_DEVICE_ID_NEC_NEON250 76 # define PCI_DEVICE_ID_NEC_NEON250 0x0067 77 #endif 78 79 /* 2D video registers */ 80 #define DISP_BASE par->mmio_base 81 #define DISP_BRDRCOLR (DISP_BASE + 0x40) 82 #define DISP_DIWMODE (DISP_BASE + 0x44) 83 #define DISP_DIWADDRL (DISP_BASE + 0x50) 84 #define DISP_DIWADDRS (DISP_BASE + 0x54) 85 #define DISP_DIWSIZE (DISP_BASE + 0x5c) 86 #define DISP_SYNCCONF (DISP_BASE + 0xd0) 87 #define DISP_BRDRHORZ (DISP_BASE + 0xd4) 88 #define DISP_SYNCSIZE (DISP_BASE + 0xd8) 89 #define DISP_BRDRVERT (DISP_BASE + 0xdc) 90 #define DISP_DIWCONF (DISP_BASE + 0xe8) 91 #define DISP_DIWHSTRT (DISP_BASE + 0xec) 92 #define DISP_DIWVSTRT (DISP_BASE + 0xf0) 93 #define DISP_PIXDEPTH (DISP_BASE + 0x108) 94 95 /* Pixel clocks, one for TV output, doubled for VGA output */ 96 #define TV_CLK 74239 97 #define VGA_CLK 37119 98 99 /* This is for 60Hz - the VTOTAL is doubled for interlaced modes */ 100 #define PAL_HTOTAL 863 101 #define PAL_VTOTAL 312 102 #define NTSC_HTOTAL 857 103 #define NTSC_VTOTAL 262 104 105 /* Supported cable types */ 106 enum { CT_VGA, CT_NONE, CT_RGB, CT_COMPOSITE }; 107 108 /* Supported video output types */ 109 enum { VO_PAL, VO_NTSC, VO_VGA }; 110 111 /* Supported palette types */ 112 enum { PAL_ARGB1555, PAL_RGB565, PAL_ARGB4444, PAL_ARGB8888 }; 113 114 struct pvr2_params { unsigned int val; char *name; }; 115 static struct pvr2_params cables[] = { 116 { CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" }, 117 }; 118 119 static struct pvr2_params outputs[] = { 120 { VO_PAL, "PAL" }, { VO_NTSC, "NTSC" }, { VO_VGA, "VGA" }, 121 }; 122 123 /* 124 * This describes the current video mode 125 */ 126 127 static struct pvr2fb_par { 128 unsigned int hsync_total; /* Clocks/line */ 129 unsigned int vsync_total; /* Lines/field */ 130 unsigned int borderstart_h; 131 unsigned int borderstop_h; 132 unsigned int borderstart_v; 133 unsigned int borderstop_v; 134 unsigned int diwstart_h; /* Horizontal offset of the display field */ 135 unsigned int diwstart_v; /* Vertical offset of the display field, for 136 interlaced modes, this is the long field */ 137 unsigned long disp_start; /* Address of image within VRAM */ 138 unsigned char is_interlaced; /* Is the display interlaced? */ 139 unsigned char is_doublescan; /* Are scanlines output twice? (doublescan) */ 140 unsigned char is_lowres; /* Is horizontal pixel-doubling enabled? */ 141 142 unsigned long mmio_base; /* MMIO base */ 143 u32 palette[16]; 144 } *currentpar; 145 146 static struct fb_info *fb_info; 147 148 static struct fb_fix_screeninfo pvr2_fix = { 149 .id = "NEC PowerVR2", 150 .type = FB_TYPE_PACKED_PIXELS, 151 .visual = FB_VISUAL_TRUECOLOR, 152 .ypanstep = 1, 153 .ywrapstep = 1, 154 .accel = FB_ACCEL_NONE, 155 }; 156 157 static struct fb_var_screeninfo pvr2_var = { 158 .xres = 640, 159 .yres = 480, 160 .xres_virtual = 640, 161 .yres_virtual = 480, 162 .bits_per_pixel =16, 163 .red = { 11, 5, 0 }, 164 .green = { 5, 6, 0 }, 165 .blue = { 0, 5, 0 }, 166 .activate = FB_ACTIVATE_NOW, 167 .height = -1, 168 .width = -1, 169 .vmode = FB_VMODE_NONINTERLACED, 170 }; 171 172 static int cable_type = CT_VGA; 173 static int video_output = VO_VGA; 174 175 static int nopan = 0; 176 static int nowrap = 1; 177 178 /* 179 * We do all updating, blanking, etc. during the vertical retrace period 180 */ 181 static unsigned int do_vmode_full = 0; /* Change the video mode */ 182 static unsigned int do_vmode_pan = 0; /* Update the video mode */ 183 static short do_blank = 0; /* (Un)Blank the screen */ 184 185 static unsigned int is_blanked = 0; /* Is the screen blanked? */ 186 187 #ifdef CONFIG_SH_STORE_QUEUES 188 static unsigned long pvr2fb_map; 189 #endif 190 191 #ifdef CONFIG_PVR2_DMA 192 static unsigned int shdma = PVR2_CASCADE_CHAN; 193 static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS; 194 #endif 195 196 static int pvr2fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, 197 unsigned int transp, struct fb_info *info); 198 static int pvr2fb_blank(int blank, struct fb_info *info); 199 static unsigned long get_line_length(int xres_virtual, int bpp); 200 static void set_color_bitfields(struct fb_var_screeninfo *var); 201 static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info); 202 static int pvr2fb_set_par(struct fb_info *info); 203 static void pvr2_update_display(struct fb_info *info); 204 static void pvr2_init_display(struct fb_info *info); 205 static void pvr2_do_blank(void); 206 static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id); 207 static int pvr2_init_cable(void); 208 static int pvr2_get_param(const struct pvr2_params *p, const char *s, 209 int val, int size); 210 #ifdef CONFIG_PVR2_DMA 211 static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, 212 size_t count, loff_t *ppos); 213 #endif 214 215 static struct fb_ops pvr2fb_ops = { 216 .owner = THIS_MODULE, 217 .fb_setcolreg = pvr2fb_setcolreg, 218 .fb_blank = pvr2fb_blank, 219 .fb_check_var = pvr2fb_check_var, 220 .fb_set_par = pvr2fb_set_par, 221 #ifdef CONFIG_PVR2_DMA 222 .fb_write = pvr2fb_write, 223 #endif 224 .fb_fillrect = cfb_fillrect, 225 .fb_copyarea = cfb_copyarea, 226 .fb_imageblit = cfb_imageblit, 227 }; 228 229 static struct fb_videomode pvr2_modedb[] = { 230 /* 231 * Broadcast video modes (PAL and NTSC). I'm unfamiliar with 232 * PAL-M and PAL-N, but from what I've read both modes parallel PAL and 233 * NTSC, so it shouldn't be a problem (I hope). 234 */ 235 236 { 237 /* 640x480 @ 60Hz interlaced (NTSC) */ 238 "ntsc_640x480i", 60, 640, 480, TV_CLK, 38, 33, 0, 18, 146, 26, 239 FB_SYNC_BROADCAST, FB_VMODE_INTERLACED | FB_VMODE_YWRAP 240 }, { 241 /* 640x240 @ 60Hz (NTSC) */ 242 /* XXX: Broken! Don't use... */ 243 "ntsc_640x240", 60, 640, 240, TV_CLK, 38, 33, 0, 0, 146, 22, 244 FB_SYNC_BROADCAST, FB_VMODE_YWRAP 245 }, { 246 /* 640x480 @ 60hz (VGA) */ 247 "vga_640x480", 60, 640, 480, VGA_CLK, 38, 33, 0, 18, 146, 26, 248 0, FB_VMODE_YWRAP 249 }, 250 }; 251 252 #define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb) 253 254 #define DEFMODE_NTSC 0 255 #define DEFMODE_PAL 0 256 #define DEFMODE_VGA 2 257 258 static int defmode = DEFMODE_NTSC; 259 static char *mode_option = NULL; 260 261 static inline void pvr2fb_set_pal_type(unsigned int type) 262 { 263 struct pvr2fb_par *par = (struct pvr2fb_par *)fb_info->par; 264 265 fb_writel(type, par->mmio_base + 0x108); 266 } 267 268 static inline void pvr2fb_set_pal_entry(struct pvr2fb_par *par, 269 unsigned int regno, 270 unsigned int val) 271 { 272 fb_writel(val, par->mmio_base + 0x1000 + (4 * regno)); 273 } 274 275 static int pvr2fb_blank(int blank, struct fb_info *info) 276 { 277 do_blank = blank ? blank : -1; 278 return 0; 279 } 280 281 static inline unsigned long get_line_length(int xres_virtual, int bpp) 282 { 283 return (unsigned long)((((xres_virtual*bpp)+31)&~31) >> 3); 284 } 285 286 static void set_color_bitfields(struct fb_var_screeninfo *var) 287 { 288 switch (var->bits_per_pixel) { 289 case 16: /* RGB 565 */ 290 pvr2fb_set_pal_type(PAL_RGB565); 291 var->red.offset = 11; var->red.length = 5; 292 var->green.offset = 5; var->green.length = 6; 293 var->blue.offset = 0; var->blue.length = 5; 294 var->transp.offset = 0; var->transp.length = 0; 295 break; 296 case 24: /* RGB 888 */ 297 var->red.offset = 16; var->red.length = 8; 298 var->green.offset = 8; var->green.length = 8; 299 var->blue.offset = 0; var->blue.length = 8; 300 var->transp.offset = 0; var->transp.length = 0; 301 break; 302 case 32: /* ARGB 8888 */ 303 pvr2fb_set_pal_type(PAL_ARGB8888); 304 var->red.offset = 16; var->red.length = 8; 305 var->green.offset = 8; var->green.length = 8; 306 var->blue.offset = 0; var->blue.length = 8; 307 var->transp.offset = 24; var->transp.length = 8; 308 break; 309 } 310 } 311 312 static int pvr2fb_setcolreg(unsigned int regno, unsigned int red, 313 unsigned int green, unsigned int blue, 314 unsigned int transp, struct fb_info *info) 315 { 316 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 317 unsigned int tmp; 318 319 if (regno > info->cmap.len) 320 return 1; 321 322 /* 323 * We only support the hardware palette for 16 and 32bpp. It's also 324 * expected that the palette format has been set by the time we get 325 * here, so we don't waste time setting it again. 326 */ 327 switch (info->var.bits_per_pixel) { 328 case 16: /* RGB 565 */ 329 tmp = (red & 0xf800) | 330 ((green & 0xfc00) >> 5) | 331 ((blue & 0xf800) >> 11); 332 333 pvr2fb_set_pal_entry(par, regno, tmp); 334 break; 335 case 24: /* RGB 888 */ 336 red >>= 8; green >>= 8; blue >>= 8; 337 tmp = (red << 16) | (green << 8) | blue; 338 break; 339 case 32: /* ARGB 8888 */ 340 red >>= 8; green >>= 8; blue >>= 8; 341 tmp = (transp << 24) | (red << 16) | (green << 8) | blue; 342 343 pvr2fb_set_pal_entry(par, regno, tmp); 344 break; 345 default: 346 pr_debug("Invalid bit depth %d?!?\n", info->var.bits_per_pixel); 347 return 1; 348 } 349 350 if (regno < 16) 351 ((u32*)(info->pseudo_palette))[regno] = tmp; 352 353 return 0; 354 } 355 356 static int pvr2fb_set_par(struct fb_info *info) 357 { 358 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 359 struct fb_var_screeninfo *var = &info->var; 360 unsigned long line_length; 361 unsigned int vtotal; 362 363 /* 364 * XXX: It's possible that a user could use a VGA box, change the cable 365 * type in hardware (i.e. switch from VGA<->composite), then change 366 * modes (i.e. switching to another VT). If that happens we should 367 * automagically change the output format to cope, but currently I 368 * don't have a VGA box to make sure this works properly. 369 */ 370 cable_type = pvr2_init_cable(); 371 if (cable_type == CT_VGA && video_output != VO_VGA) 372 video_output = VO_VGA; 373 374 var->vmode &= FB_VMODE_MASK; 375 if (var->vmode & FB_VMODE_INTERLACED && video_output != VO_VGA) 376 par->is_interlaced = 1; 377 /* 378 * XXX: Need to be more creative with this (i.e. allow doublecan for 379 * PAL/NTSC output). 380 */ 381 if (var->vmode & FB_VMODE_DOUBLE && video_output == VO_VGA) 382 par->is_doublescan = 1; 383 384 par->hsync_total = var->left_margin + var->xres + var->right_margin + 385 var->hsync_len; 386 par->vsync_total = var->upper_margin + var->yres + var->lower_margin + 387 var->vsync_len; 388 389 if (var->sync & FB_SYNC_BROADCAST) { 390 vtotal = par->vsync_total; 391 if (par->is_interlaced) 392 vtotal /= 2; 393 if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) { 394 /* XXX: Check for start values here... */ 395 /* XXX: Check hardware for PAL-compatibility */ 396 par->borderstart_h = 116; 397 par->borderstart_v = 44; 398 } else { 399 /* NTSC video output */ 400 par->borderstart_h = 126; 401 par->borderstart_v = 18; 402 } 403 } else { 404 /* VGA mode */ 405 /* XXX: What else needs to be checked? */ 406 /* 407 * XXX: We have a little freedom in VGA modes, what ranges 408 * should be here (i.e. hsync/vsync totals, etc.)? 409 */ 410 par->borderstart_h = 126; 411 par->borderstart_v = 40; 412 } 413 414 /* Calculate the remainding offsets */ 415 par->diwstart_h = par->borderstart_h + var->left_margin; 416 par->diwstart_v = par->borderstart_v + var->upper_margin; 417 par->borderstop_h = par->diwstart_h + var->xres + 418 var->right_margin; 419 par->borderstop_v = par->diwstart_v + var->yres + 420 var->lower_margin; 421 422 if (!par->is_interlaced) 423 par->borderstop_v /= 2; 424 if (info->var.xres < 640) 425 par->is_lowres = 1; 426 427 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel); 428 par->disp_start = info->fix.smem_start + (line_length * var->yoffset) * line_length; 429 info->fix.line_length = line_length; 430 return 0; 431 } 432 433 static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 434 { 435 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par; 436 unsigned int vtotal, hsync_total; 437 unsigned long line_length; 438 439 if (var->pixclock != TV_CLK && var->pixclock != VGA_CLK) { 440 pr_debug("Invalid pixclock value %d\n", var->pixclock); 441 return -EINVAL; 442 } 443 444 if (var->xres < 320) 445 var->xres = 320; 446 if (var->yres < 240) 447 var->yres = 240; 448 if (var->xres_virtual < var->xres) 449 var->xres_virtual = var->xres; 450 if (var->yres_virtual < var->yres) 451 var->yres_virtual = var->yres; 452 453 if (var->bits_per_pixel <= 16) 454 var->bits_per_pixel = 16; 455 else if (var->bits_per_pixel <= 24) 456 var->bits_per_pixel = 24; 457 else if (var->bits_per_pixel <= 32) 458 var->bits_per_pixel = 32; 459 460 set_color_bitfields(var); 461 462 if (var->vmode & FB_VMODE_YWRAP) { 463 if (var->xoffset || var->yoffset < 0 || 464 var->yoffset >= var->yres_virtual) { 465 var->xoffset = var->yoffset = 0; 466 } else { 467 if (var->xoffset > var->xres_virtual - var->xres || 468 var->yoffset > var->yres_virtual - var->yres || 469 var->xoffset < 0 || var->yoffset < 0) 470 var->xoffset = var->yoffset = 0; 471 } 472 } else { 473 var->xoffset = var->yoffset = 0; 474 } 475 476 /* 477 * XXX: Need to be more creative with this (i.e. allow doublecan for 478 * PAL/NTSC output). 479 */ 480 if (var->yres < 480 && video_output == VO_VGA) 481 var->vmode |= FB_VMODE_DOUBLE; 482 483 if (video_output != VO_VGA) { 484 var->sync |= FB_SYNC_BROADCAST; 485 var->vmode |= FB_VMODE_INTERLACED; 486 } else { 487 var->sync &= ~FB_SYNC_BROADCAST; 488 var->vmode &= ~FB_VMODE_INTERLACED; 489 var->vmode |= FB_VMODE_NONINTERLACED; 490 } 491 492 if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_TEST) { 493 var->right_margin = par->borderstop_h - 494 (par->diwstart_h + var->xres); 495 var->left_margin = par->diwstart_h - par->borderstart_h; 496 var->hsync_len = par->borderstart_h + 497 (par->hsync_total - par->borderstop_h); 498 499 var->upper_margin = par->diwstart_v - par->borderstart_v; 500 var->lower_margin = par->borderstop_v - 501 (par->diwstart_v + var->yres); 502 var->vsync_len = par->borderstop_v + 503 (par->vsync_total - par->borderstop_v); 504 } 505 506 hsync_total = var->left_margin + var->xres + var->right_margin + 507 var->hsync_len; 508 vtotal = var->upper_margin + var->yres + var->lower_margin + 509 var->vsync_len; 510 511 if (var->sync & FB_SYNC_BROADCAST) { 512 if (var->vmode & FB_VMODE_INTERLACED) 513 vtotal /= 2; 514 if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) { 515 /* PAL video output */ 516 /* XXX: Should be using a range here ... ? */ 517 if (hsync_total != PAL_HTOTAL) { 518 pr_debug("invalid hsync total for PAL\n"); 519 return -EINVAL; 520 } 521 } else { 522 /* NTSC video output */ 523 if (hsync_total != NTSC_HTOTAL) { 524 pr_debug("invalid hsync total for NTSC\n"); 525 return -EINVAL; 526 } 527 } 528 } 529 530 /* Check memory sizes */ 531 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel); 532 if (line_length * var->yres_virtual > info->fix.smem_len) 533 return -ENOMEM; 534 535 return 0; 536 } 537 538 static void pvr2_update_display(struct fb_info *info) 539 { 540 struct pvr2fb_par *par = (struct pvr2fb_par *) info->par; 541 struct fb_var_screeninfo *var = &info->var; 542 543 /* Update the start address of the display image */ 544 fb_writel(par->disp_start, DISP_DIWADDRL); 545 fb_writel(par->disp_start + 546 get_line_length(var->xoffset+var->xres, var->bits_per_pixel), 547 DISP_DIWADDRS); 548 } 549 550 /* 551 * Initialize the video mode. Currently, the 16bpp and 24bpp modes aren't 552 * very stable. It's probably due to the fact that a lot of the 2D video 553 * registers are still undocumented. 554 */ 555 556 static void pvr2_init_display(struct fb_info *info) 557 { 558 struct pvr2fb_par *par = (struct pvr2fb_par *) info->par; 559 struct fb_var_screeninfo *var = &info->var; 560 unsigned int diw_height, diw_width, diw_modulo = 1; 561 unsigned int bytesperpixel = var->bits_per_pixel >> 3; 562 563 /* hsync and vsync totals */ 564 fb_writel((par->vsync_total << 16) | par->hsync_total, DISP_SYNCSIZE); 565 566 /* column height, modulo, row width */ 567 /* since we're "panning" within vram, we need to offset things based 568 * on the offset from the virtual x start to our real gfx. */ 569 if (video_output != VO_VGA && par->is_interlaced) 570 diw_modulo += info->fix.line_length / 4; 571 diw_height = (par->is_interlaced ? var->yres / 2 : var->yres); 572 diw_width = get_line_length(var->xres, var->bits_per_pixel) / 4; 573 fb_writel((diw_modulo << 20) | (--diw_height << 10) | --diw_width, 574 DISP_DIWSIZE); 575 576 /* display address, long and short fields */ 577 fb_writel(par->disp_start, DISP_DIWADDRL); 578 fb_writel(par->disp_start + 579 get_line_length(var->xoffset+var->xres, var->bits_per_pixel), 580 DISP_DIWADDRS); 581 582 /* border horizontal, border vertical, border color */ 583 fb_writel((par->borderstart_h << 16) | par->borderstop_h, DISP_BRDRHORZ); 584 fb_writel((par->borderstart_v << 16) | par->borderstop_v, DISP_BRDRVERT); 585 fb_writel(0, DISP_BRDRCOLR); 586 587 /* display window start position */ 588 fb_writel(par->diwstart_h, DISP_DIWHSTRT); 589 fb_writel((par->diwstart_v << 16) | par->diwstart_v, DISP_DIWVSTRT); 590 591 /* misc. settings */ 592 fb_writel((0x16 << 16) | par->is_lowres, DISP_DIWCONF); 593 594 /* clock doubler (for VGA), scan doubler, display enable */ 595 fb_writel(((video_output == VO_VGA) << 23) | 596 (par->is_doublescan << 1) | 1, DISP_DIWMODE); 597 598 /* bits per pixel */ 599 fb_writel(fb_readl(DISP_DIWMODE) | (--bytesperpixel << 2), DISP_DIWMODE); 600 fb_writel(bytesperpixel << 2, DISP_PIXDEPTH); 601 602 /* video enable, color sync, interlace, 603 * hsync and vsync polarity (currently unused) */ 604 fb_writel(0x100 | ((par->is_interlaced /*|4*/) << 4), DISP_SYNCCONF); 605 } 606 607 /* Simulate blanking by making the border cover the entire screen */ 608 609 #define BLANK_BIT (1<<3) 610 611 static void pvr2_do_blank(void) 612 { 613 struct pvr2fb_par *par = currentpar; 614 unsigned long diwconf; 615 616 diwconf = fb_readl(DISP_DIWCONF); 617 if (do_blank > 0) 618 fb_writel(diwconf | BLANK_BIT, DISP_DIWCONF); 619 else 620 fb_writel(diwconf & ~BLANK_BIT, DISP_DIWCONF); 621 622 is_blanked = do_blank > 0 ? do_blank : 0; 623 } 624 625 static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id) 626 { 627 struct fb_info *info = dev_id; 628 629 if (do_vmode_pan || do_vmode_full) 630 pvr2_update_display(info); 631 if (do_vmode_full) 632 pvr2_init_display(info); 633 if (do_vmode_pan) 634 do_vmode_pan = 0; 635 if (do_vmode_full) 636 do_vmode_full = 0; 637 if (do_blank) { 638 pvr2_do_blank(); 639 do_blank = 0; 640 } 641 return IRQ_HANDLED; 642 } 643 644 /* 645 * Determine the cable type and initialize the cable output format. Don't do 646 * anything if the cable type has been overidden (via "cable:XX"). 647 */ 648 649 #define PCTRA 0xff80002c 650 #define PDTRA 0xff800030 651 #define VOUTC 0xa0702c00 652 653 static int pvr2_init_cable(void) 654 { 655 if (cable_type < 0) { 656 fb_writel((fb_readl(PCTRA) & 0xfff0ffff) | 0x000a0000, 657 PCTRA); 658 cable_type = (fb_readw(PDTRA) >> 8) & 3; 659 } 660 661 /* Now select the output format (either composite or other) */ 662 /* XXX: Save the previous val first, as this reg is also AICA 663 related */ 664 if (cable_type == CT_COMPOSITE) 665 fb_writel(3 << 8, VOUTC); 666 else if (cable_type == CT_RGB) 667 fb_writel(1 << 9, VOUTC); 668 else 669 fb_writel(0, VOUTC); 670 671 return cable_type; 672 } 673 674 #ifdef CONFIG_PVR2_DMA 675 static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, 676 size_t count, loff_t *ppos) 677 { 678 unsigned long dst, start, end, len; 679 unsigned int nr_pages; 680 struct page **pages; 681 int ret, i; 682 683 nr_pages = (count + PAGE_SIZE - 1) >> PAGE_SHIFT; 684 685 pages = kmalloc(nr_pages * sizeof(struct page *), GFP_KERNEL); 686 if (!pages) 687 return -ENOMEM; 688 689 ret = get_user_pages_unlocked((unsigned long)buf, nr_pages, pages, 690 FOLL_WRITE); 691 692 if (ret < nr_pages) { 693 nr_pages = ret; 694 ret = -EINVAL; 695 goto out_unmap; 696 } 697 698 dma_configure_channel(shdma, 0x12c1); 699 700 dst = (unsigned long)fb_info->screen_base + *ppos; 701 start = (unsigned long)page_address(pages[0]); 702 end = (unsigned long)page_address(pages[nr_pages]); 703 len = nr_pages << PAGE_SHIFT; 704 705 /* Half-assed contig check */ 706 if (start + len == end) { 707 /* As we do this in one shot, it's either all or nothing.. */ 708 if ((*ppos + len) > fb_info->fix.smem_len) { 709 ret = -ENOSPC; 710 goto out_unmap; 711 } 712 713 dma_write(shdma, start, 0, len); 714 dma_write(pvr2dma, 0, dst, len); 715 dma_wait_for_completion(pvr2dma); 716 717 goto out; 718 } 719 720 /* Not contiguous, writeout per-page instead.. */ 721 for (i = 0; i < nr_pages; i++, dst += PAGE_SIZE) { 722 if ((*ppos + (i << PAGE_SHIFT)) > fb_info->fix.smem_len) { 723 ret = -ENOSPC; 724 goto out_unmap; 725 } 726 727 dma_write_page(shdma, (unsigned long)page_address(pages[i]), 0); 728 dma_write_page(pvr2dma, 0, dst); 729 dma_wait_for_completion(pvr2dma); 730 } 731 732 out: 733 *ppos += count; 734 ret = count; 735 736 out_unmap: 737 for (i = 0; i < nr_pages; i++) 738 put_page(pages[i]); 739 740 kfree(pages); 741 742 return ret; 743 } 744 #endif /* CONFIG_PVR2_DMA */ 745 746 /** 747 * pvr2fb_common_init 748 * 749 * Common init code for the PVR2 chips. 750 * 751 * This mostly takes care of the common aspects of the fb setup and 752 * registration. It's expected that the board-specific init code has 753 * already setup pvr2_fix with something meaningful at this point. 754 * 755 * Device info reporting is also done here, as well as picking a sane 756 * default from the modedb. For board-specific modelines, simply define 757 * a per-board modedb. 758 * 759 * Also worth noting is that the cable and video output types are likely 760 * always going to be VGA for the PCI-based PVR2 boards, but we leave this 761 * in for flexibility anyways. Who knows, maybe someone has tv-out on a 762 * PCI-based version of these things ;-) 763 */ 764 static int pvr2fb_common_init(void) 765 { 766 struct pvr2fb_par *par = currentpar; 767 unsigned long modememused, rev; 768 769 fb_info->screen_base = ioremap_nocache(pvr2_fix.smem_start, 770 pvr2_fix.smem_len); 771 772 if (!fb_info->screen_base) { 773 printk(KERN_ERR "pvr2fb: Failed to remap smem space\n"); 774 goto out_err; 775 } 776 777 par->mmio_base = (unsigned long)ioremap_nocache(pvr2_fix.mmio_start, 778 pvr2_fix.mmio_len); 779 if (!par->mmio_base) { 780 printk(KERN_ERR "pvr2fb: Failed to remap mmio space\n"); 781 goto out_err; 782 } 783 784 fb_memset(fb_info->screen_base, 0, pvr2_fix.smem_len); 785 786 pvr2_fix.ypanstep = nopan ? 0 : 1; 787 pvr2_fix.ywrapstep = nowrap ? 0 : 1; 788 789 fb_info->fbops = &pvr2fb_ops; 790 fb_info->fix = pvr2_fix; 791 fb_info->par = currentpar; 792 fb_info->pseudo_palette = currentpar->palette; 793 fb_info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; 794 795 if (video_output == VO_VGA) 796 defmode = DEFMODE_VGA; 797 798 if (!mode_option) 799 mode_option = "640x480@60"; 800 801 if (!fb_find_mode(&fb_info->var, fb_info, mode_option, pvr2_modedb, 802 NUM_TOTAL_MODES, &pvr2_modedb[defmode], 16)) 803 fb_info->var = pvr2_var; 804 805 fb_alloc_cmap(&fb_info->cmap, 256, 0); 806 807 if (register_framebuffer(fb_info) < 0) 808 goto out_err; 809 /*Must write PIXDEPTH to register before anything is displayed - so force init */ 810 pvr2_init_display(fb_info); 811 812 modememused = get_line_length(fb_info->var.xres_virtual, 813 fb_info->var.bits_per_pixel); 814 modememused *= fb_info->var.yres_virtual; 815 816 rev = fb_readl(par->mmio_base + 0x04); 817 818 fb_info(fb_info, "%s (rev %ld.%ld) frame buffer device, using %ldk/%ldk of video memory\n", 819 fb_info->fix.id, (rev >> 4) & 0x0f, rev & 0x0f, 820 modememused >> 10, 821 (unsigned long)(fb_info->fix.smem_len >> 10)); 822 fb_info(fb_info, "Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n", 823 fb_info->var.xres, fb_info->var.yres, 824 fb_info->var.bits_per_pixel, 825 get_line_length(fb_info->var.xres, fb_info->var.bits_per_pixel), 826 (char *)pvr2_get_param(cables, NULL, cable_type, 3), 827 (char *)pvr2_get_param(outputs, NULL, video_output, 3)); 828 829 #ifdef CONFIG_SH_STORE_QUEUES 830 fb_notice(fb_info, "registering with SQ API\n"); 831 832 pvr2fb_map = sq_remap(fb_info->fix.smem_start, fb_info->fix.smem_len, 833 fb_info->fix.id, PAGE_SHARED); 834 835 fb_notice(fb_info, "Mapped video memory to SQ addr 0x%lx\n", 836 pvr2fb_map); 837 #endif 838 839 return 0; 840 841 out_err: 842 if (fb_info->screen_base) 843 iounmap(fb_info->screen_base); 844 if (par->mmio_base) 845 iounmap((void *)par->mmio_base); 846 847 return -ENXIO; 848 } 849 850 #ifdef CONFIG_SH_DREAMCAST 851 static int __init pvr2fb_dc_init(void) 852 { 853 if (!mach_is_dreamcast()) 854 return -ENXIO; 855 856 /* Make a guess at the monitor based on the attached cable */ 857 if (pvr2_init_cable() == CT_VGA) { 858 fb_info->monspecs.hfmin = 30000; 859 fb_info->monspecs.hfmax = 70000; 860 fb_info->monspecs.vfmin = 60; 861 fb_info->monspecs.vfmax = 60; 862 } else { 863 /* Not VGA, using a TV (taken from acornfb) */ 864 fb_info->monspecs.hfmin = 15469; 865 fb_info->monspecs.hfmax = 15781; 866 fb_info->monspecs.vfmin = 49; 867 fb_info->monspecs.vfmax = 51; 868 } 869 870 /* 871 * XXX: This needs to pull default video output via BIOS or other means 872 */ 873 if (video_output < 0) { 874 if (cable_type == CT_VGA) { 875 video_output = VO_VGA; 876 } else { 877 video_output = VO_NTSC; 878 } 879 } 880 881 /* 882 * Nothing exciting about the DC PVR2 .. only a measly 8MiB. 883 */ 884 pvr2_fix.smem_start = 0xa5000000; /* RAM starts here */ 885 pvr2_fix.smem_len = 8 << 20; 886 887 pvr2_fix.mmio_start = 0xa05f8000; /* registers start here */ 888 pvr2_fix.mmio_len = 0x2000; 889 890 if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, IRQF_SHARED, 891 "pvr2 VBL handler", fb_info)) { 892 return -EBUSY; 893 } 894 895 #ifdef CONFIG_PVR2_DMA 896 if (request_dma(pvr2dma, "pvr2") != 0) { 897 free_irq(HW_EVENT_VSYNC, fb_info); 898 return -EBUSY; 899 } 900 #endif 901 902 return pvr2fb_common_init(); 903 } 904 905 static void __exit pvr2fb_dc_exit(void) 906 { 907 if (fb_info->screen_base) { 908 iounmap(fb_info->screen_base); 909 fb_info->screen_base = NULL; 910 } 911 if (currentpar->mmio_base) { 912 iounmap((void *)currentpar->mmio_base); 913 currentpar->mmio_base = 0; 914 } 915 916 free_irq(HW_EVENT_VSYNC, fb_info); 917 #ifdef CONFIG_PVR2_DMA 918 free_dma(pvr2dma); 919 #endif 920 } 921 #endif /* CONFIG_SH_DREAMCAST */ 922 923 #ifdef CONFIG_PCI 924 static int pvr2fb_pci_probe(struct pci_dev *pdev, 925 const struct pci_device_id *ent) 926 { 927 int ret; 928 929 ret = pci_enable_device(pdev); 930 if (ret) { 931 printk(KERN_ERR "pvr2fb: PCI enable failed\n"); 932 return ret; 933 } 934 935 ret = pci_request_regions(pdev, "pvr2fb"); 936 if (ret) { 937 printk(KERN_ERR "pvr2fb: PCI request regions failed\n"); 938 return ret; 939 } 940 941 /* 942 * Slightly more exciting than the DC PVR2 .. 16MiB! 943 */ 944 pvr2_fix.smem_start = pci_resource_start(pdev, 0); 945 pvr2_fix.smem_len = pci_resource_len(pdev, 0); 946 947 pvr2_fix.mmio_start = pci_resource_start(pdev, 1); 948 pvr2_fix.mmio_len = pci_resource_len(pdev, 1); 949 950 fb_info->device = &pdev->dev; 951 952 return pvr2fb_common_init(); 953 } 954 955 static void pvr2fb_pci_remove(struct pci_dev *pdev) 956 { 957 if (fb_info->screen_base) { 958 iounmap(fb_info->screen_base); 959 fb_info->screen_base = NULL; 960 } 961 if (currentpar->mmio_base) { 962 iounmap((void *)currentpar->mmio_base); 963 currentpar->mmio_base = 0; 964 } 965 966 pci_release_regions(pdev); 967 } 968 969 static struct pci_device_id pvr2fb_pci_tbl[] = { 970 { PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NEON250, 971 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 972 { 0, }, 973 }; 974 975 MODULE_DEVICE_TABLE(pci, pvr2fb_pci_tbl); 976 977 static struct pci_driver pvr2fb_pci_driver = { 978 .name = "pvr2fb", 979 .id_table = pvr2fb_pci_tbl, 980 .probe = pvr2fb_pci_probe, 981 .remove = pvr2fb_pci_remove, 982 }; 983 984 static int __init pvr2fb_pci_init(void) 985 { 986 return pci_register_driver(&pvr2fb_pci_driver); 987 } 988 989 static void __exit pvr2fb_pci_exit(void) 990 { 991 pci_unregister_driver(&pvr2fb_pci_driver); 992 } 993 #endif /* CONFIG_PCI */ 994 995 static int pvr2_get_param(const struct pvr2_params *p, const char *s, int val, 996 int size) 997 { 998 int i; 999 1000 for (i = 0 ; i < size ; i++ ) { 1001 if (s != NULL) { 1002 if (!strncasecmp(p[i].name, s, strlen(s))) 1003 return p[i].val; 1004 } else { 1005 if (p[i].val == val) 1006 return (int)p[i].name; 1007 } 1008 } 1009 return -1; 1010 } 1011 1012 /* 1013 * Parse command arguments. Supported arguments are: 1014 * inverse Use inverse color maps 1015 * cable:composite|rgb|vga Override the video cable type 1016 * output:NTSC|PAL|VGA Override the video output format 1017 * 1018 * <xres>x<yres>[-<bpp>][@<refresh>] or, 1019 * <name>[-<bpp>][@<refresh>] Startup using this video mode 1020 */ 1021 1022 #ifndef MODULE 1023 static int __init pvr2fb_setup(char *options) 1024 { 1025 char *this_opt; 1026 char cable_arg[80]; 1027 char output_arg[80]; 1028 1029 if (!options || !*options) 1030 return 0; 1031 1032 while ((this_opt = strsep(&options, ","))) { 1033 if (!*this_opt) 1034 continue; 1035 if (!strcmp(this_opt, "inverse")) { 1036 fb_invert_cmaps(); 1037 } else if (!strncmp(this_opt, "cable:", 6)) { 1038 strcpy(cable_arg, this_opt + 6); 1039 } else if (!strncmp(this_opt, "output:", 7)) { 1040 strcpy(output_arg, this_opt + 7); 1041 } else if (!strncmp(this_opt, "nopan", 5)) { 1042 nopan = 1; 1043 } else if (!strncmp(this_opt, "nowrap", 6)) { 1044 nowrap = 1; 1045 } else { 1046 mode_option = this_opt; 1047 } 1048 } 1049 1050 if (*cable_arg) 1051 cable_type = pvr2_get_param(cables, cable_arg, 0, 3); 1052 if (*output_arg) 1053 video_output = pvr2_get_param(outputs, output_arg, 0, 3); 1054 1055 return 0; 1056 } 1057 #endif 1058 1059 static struct pvr2_board { 1060 int (*init)(void); 1061 void (*exit)(void); 1062 char name[16]; 1063 } board_driver[] __refdata = { 1064 #ifdef CONFIG_SH_DREAMCAST 1065 { pvr2fb_dc_init, pvr2fb_dc_exit, "Sega DC PVR2" }, 1066 #endif 1067 #ifdef CONFIG_PCI 1068 { pvr2fb_pci_init, pvr2fb_pci_exit, "PCI PVR2" }, 1069 #endif 1070 { 0, }, 1071 }; 1072 1073 static int __init pvr2fb_init(void) 1074 { 1075 int i, ret = -ENODEV; 1076 int size; 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 size = sizeof(struct fb_info) + sizeof(struct pvr2fb_par) + 16 * sizeof(u32); 1086 1087 fb_info = framebuffer_alloc(sizeof(struct pvr2fb_par), NULL); 1088 1089 if (!fb_info) { 1090 printk(KERN_ERR "Failed to allocate memory for fb_info\n"); 1091 return -ENOMEM; 1092 } 1093 1094 1095 currentpar = fb_info->par; 1096 1097 for (i = 0; i < ARRAY_SIZE(board_driver); i++) { 1098 struct pvr2_board *pvr_board = board_driver + i; 1099 1100 if (!pvr_board->init) 1101 continue; 1102 1103 ret = pvr_board->init(); 1104 1105 if (ret != 0) { 1106 printk(KERN_ERR "pvr2fb: Failed init of %s device\n", 1107 pvr_board->name); 1108 framebuffer_release(fb_info); 1109 break; 1110 } 1111 } 1112 1113 return ret; 1114 } 1115 1116 static void __exit pvr2fb_exit(void) 1117 { 1118 int i; 1119 1120 for (i = 0; i < ARRAY_SIZE(board_driver); i++) { 1121 struct pvr2_board *pvr_board = board_driver + i; 1122 1123 if (pvr_board->exit) 1124 pvr_board->exit(); 1125 } 1126 1127 #ifdef CONFIG_SH_STORE_QUEUES 1128 sq_unmap(pvr2fb_map); 1129 #endif 1130 1131 unregister_framebuffer(fb_info); 1132 framebuffer_release(fb_info); 1133 } 1134 1135 module_init(pvr2fb_init); 1136 module_exit(pvr2fb_exit); 1137 1138 MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, M. R. Brown <mrbrown@0xd6.org>"); 1139 MODULE_DESCRIPTION("Framebuffer driver for NEC PowerVR 2 based graphics boards"); 1140 MODULE_LICENSE("GPL"); 1141