Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * SGI GBE frame buffer driver |
| 3 | * |
| 4 | * Copyright (C) 1999 Silicon Graphics, Inc. - Jeffrey Newquist |
| 5 | * Copyright (C) 2002 Vivien Chappelier <vivien.chappelier@linux-mips.org> |
| 6 | * |
| 7 | * This file is subject to the terms and conditions of the GNU General Public |
| 8 | * License. See the file COPYING in the main directory of this archive for |
| 9 | * more details. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/config.h> |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/dma-mapping.h> |
| 16 | #include <linux/errno.h> |
| 17 | #include <linux/fb.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/module.h> |
| 23 | |
| 24 | #ifdef CONFIG_X86 |
| 25 | #include <asm/mtrr.h> |
| 26 | #endif |
| 27 | #ifdef CONFIG_MIPS |
| 28 | #include <asm/addrspace.h> |
| 29 | #endif |
| 30 | #include <asm/byteorder.h> |
| 31 | #include <asm/io.h> |
| 32 | #include <asm/tlbflush.h> |
| 33 | |
| 34 | #include <video/gbe.h> |
| 35 | |
| 36 | static struct sgi_gbe *gbe; |
| 37 | |
| 38 | struct gbefb_par { |
| 39 | struct fb_var_screeninfo var; |
| 40 | struct gbe_timing_info timing; |
| 41 | int valid; |
| 42 | }; |
| 43 | |
| 44 | #ifdef CONFIG_SGI_IP32 |
| 45 | #define GBE_BASE 0x16000000 /* SGI O2 */ |
| 46 | #endif |
| 47 | |
| 48 | #ifdef CONFIG_X86_VISWS |
| 49 | #define GBE_BASE 0xd0000000 /* SGI Visual Workstation */ |
| 50 | #endif |
| 51 | |
| 52 | /* macro for fastest write-though access to the framebuffer */ |
| 53 | #ifdef CONFIG_MIPS |
| 54 | #ifdef CONFIG_CPU_R10000 |
| 55 | #define pgprot_fb(_prot) (((_prot) & (~_CACHE_MASK)) | _CACHE_UNCACHED_ACCELERATED) |
| 56 | #else |
| 57 | #define pgprot_fb(_prot) (((_prot) & (~_CACHE_MASK)) | _CACHE_CACHABLE_NO_WA) |
| 58 | #endif |
| 59 | #endif |
| 60 | #ifdef CONFIG_X86 |
| 61 | #define pgprot_fb(_prot) ((_prot) | _PAGE_PCD) |
| 62 | #endif |
| 63 | |
| 64 | /* |
| 65 | * RAM we reserve for the frame buffer. This defines the maximum screen |
| 66 | * size |
| 67 | */ |
| 68 | #if CONFIG_FB_GBE_MEM > 8 |
| 69 | #error GBE Framebuffer cannot use more than 8MB of memory |
| 70 | #endif |
| 71 | |
| 72 | #define TILE_SHIFT 16 |
| 73 | #define TILE_SIZE (1 << TILE_SHIFT) |
| 74 | #define TILE_MASK (TILE_SIZE - 1) |
| 75 | |
| 76 | static unsigned int gbe_mem_size = CONFIG_FB_GBE_MEM * 1024*1024; |
| 77 | static void *gbe_mem; |
| 78 | static dma_addr_t gbe_dma_addr; |
| 79 | unsigned long gbe_mem_phys; |
| 80 | |
| 81 | static struct { |
| 82 | uint16_t *cpu; |
| 83 | dma_addr_t dma; |
| 84 | } gbe_tiles; |
| 85 | |
| 86 | static int gbe_revision; |
| 87 | |
| 88 | static int ypan, ywrap; |
| 89 | |
| 90 | static uint32_t pseudo_palette[256]; |
| 91 | |
| 92 | static char *mode_option __initdata = NULL; |
| 93 | |
| 94 | /* default CRT mode */ |
| 95 | static struct fb_var_screeninfo default_var_CRT __initdata = { |
| 96 | /* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */ |
| 97 | .xres = 640, |
| 98 | .yres = 480, |
| 99 | .xres_virtual = 640, |
| 100 | .yres_virtual = 480, |
| 101 | .xoffset = 0, |
| 102 | .yoffset = 0, |
| 103 | .bits_per_pixel = 8, |
| 104 | .grayscale = 0, |
| 105 | .red = { 0, 8, 0 }, |
| 106 | .green = { 0, 8, 0 }, |
| 107 | .blue = { 0, 8, 0 }, |
| 108 | .transp = { 0, 0, 0 }, |
| 109 | .nonstd = 0, |
| 110 | .activate = 0, |
| 111 | .height = -1, |
| 112 | .width = -1, |
| 113 | .accel_flags = 0, |
| 114 | .pixclock = 39722, /* picoseconds */ |
| 115 | .left_margin = 48, |
| 116 | .right_margin = 16, |
| 117 | .upper_margin = 33, |
| 118 | .lower_margin = 10, |
| 119 | .hsync_len = 96, |
| 120 | .vsync_len = 2, |
| 121 | .sync = 0, |
| 122 | .vmode = FB_VMODE_NONINTERLACED, |
| 123 | }; |
| 124 | |
| 125 | /* default LCD mode */ |
| 126 | static struct fb_var_screeninfo default_var_LCD __initdata = { |
| 127 | /* 1600x1024, 8 bpp */ |
| 128 | .xres = 1600, |
| 129 | .yres = 1024, |
| 130 | .xres_virtual = 1600, |
| 131 | .yres_virtual = 1024, |
| 132 | .xoffset = 0, |
| 133 | .yoffset = 0, |
| 134 | .bits_per_pixel = 8, |
| 135 | .grayscale = 0, |
| 136 | .red = { 0, 8, 0 }, |
| 137 | .green = { 0, 8, 0 }, |
| 138 | .blue = { 0, 8, 0 }, |
| 139 | .transp = { 0, 0, 0 }, |
| 140 | .nonstd = 0, |
| 141 | .activate = 0, |
| 142 | .height = -1, |
| 143 | .width = -1, |
| 144 | .accel_flags = 0, |
| 145 | .pixclock = 9353, |
| 146 | .left_margin = 20, |
| 147 | .right_margin = 30, |
| 148 | .upper_margin = 37, |
| 149 | .lower_margin = 3, |
| 150 | .hsync_len = 20, |
| 151 | .vsync_len = 3, |
| 152 | .sync = 0, |
| 153 | .vmode = FB_VMODE_NONINTERLACED |
| 154 | }; |
| 155 | |
| 156 | /* default modedb mode */ |
| 157 | /* 640x480, 60 Hz, Non-Interlaced (25.172 MHz dotclock) */ |
| 158 | static struct fb_videomode default_mode_CRT __initdata = { |
| 159 | .refresh = 60, |
| 160 | .xres = 640, |
| 161 | .yres = 480, |
| 162 | .pixclock = 39722, |
| 163 | .left_margin = 48, |
| 164 | .right_margin = 16, |
| 165 | .upper_margin = 33, |
| 166 | .lower_margin = 10, |
| 167 | .hsync_len = 96, |
| 168 | .vsync_len = 2, |
| 169 | .sync = 0, |
| 170 | .vmode = FB_VMODE_NONINTERLACED, |
| 171 | }; |
| 172 | /* 1600x1024 SGI flatpanel 1600sw */ |
| 173 | static struct fb_videomode default_mode_LCD __initdata = { |
| 174 | /* 1600x1024, 8 bpp */ |
| 175 | .xres = 1600, |
| 176 | .yres = 1024, |
| 177 | .pixclock = 9353, |
| 178 | .left_margin = 20, |
| 179 | .right_margin = 30, |
| 180 | .upper_margin = 37, |
| 181 | .lower_margin = 3, |
| 182 | .hsync_len = 20, |
| 183 | .vsync_len = 3, |
| 184 | .vmode = FB_VMODE_NONINTERLACED, |
| 185 | }; |
| 186 | |
| 187 | struct fb_videomode *default_mode = &default_mode_CRT; |
| 188 | struct fb_var_screeninfo *default_var = &default_var_CRT; |
| 189 | |
| 190 | static int flat_panel_enabled = 0; |
| 191 | |
| 192 | static void gbe_reset(void) |
| 193 | { |
| 194 | /* Turn on dotclock PLL */ |
| 195 | gbe->ctrlstat = 0x300aa000; |
| 196 | } |
| 197 | |
| 198 | |
| 199 | /* |
| 200 | * Function: gbe_turn_off |
| 201 | * Parameters: (None) |
| 202 | * Description: This should turn off the monitor and gbe. This is used |
| 203 | * when switching between the serial console and the graphics |
| 204 | * console. |
| 205 | */ |
| 206 | |
| 207 | void gbe_turn_off(void) |
| 208 | { |
| 209 | int i; |
| 210 | unsigned int val, x, y, vpixen_off; |
| 211 | |
| 212 | /* check if pixel counter is on */ |
| 213 | val = gbe->vt_xy; |
| 214 | if (GET_GBE_FIELD(VT_XY, FREEZE, val) == 1) |
| 215 | return; |
| 216 | |
| 217 | /* turn off DMA */ |
| 218 | val = gbe->ovr_control; |
| 219 | SET_GBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, val, 0); |
| 220 | gbe->ovr_control = val; |
| 221 | udelay(1000); |
| 222 | val = gbe->frm_control; |
| 223 | SET_GBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, val, 0); |
| 224 | gbe->frm_control = val; |
| 225 | udelay(1000); |
| 226 | val = gbe->did_control; |
| 227 | SET_GBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, val, 0); |
| 228 | gbe->did_control = val; |
| 229 | udelay(1000); |
| 230 | |
| 231 | /* We have to wait through two vertical retrace periods before |
| 232 | * the pixel DMA is turned off for sure. */ |
| 233 | for (i = 0; i < 10000; i++) { |
| 234 | val = gbe->frm_inhwctrl; |
| 235 | if (GET_GBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, val)) { |
| 236 | udelay(10); |
| 237 | } else { |
| 238 | val = gbe->ovr_inhwctrl; |
| 239 | if (GET_GBE_FIELD(OVR_INHWCTRL, OVR_DMA_ENABLE, val)) { |
| 240 | udelay(10); |
| 241 | } else { |
| 242 | val = gbe->did_inhwctrl; |
| 243 | if (GET_GBE_FIELD(DID_INHWCTRL, DID_DMA_ENABLE, val)) { |
| 244 | udelay(10); |
| 245 | } else |
| 246 | break; |
| 247 | } |
| 248 | } |
| 249 | } |
| 250 | if (i == 10000) |
| 251 | printk(KERN_ERR "gbefb: turn off DMA timed out\n"); |
| 252 | |
| 253 | /* wait for vpixen_off */ |
| 254 | val = gbe->vt_vpixen; |
| 255 | vpixen_off = GET_GBE_FIELD(VT_VPIXEN, VPIXEN_OFF, val); |
| 256 | |
| 257 | for (i = 0; i < 100000; i++) { |
| 258 | val = gbe->vt_xy; |
| 259 | x = GET_GBE_FIELD(VT_XY, X, val); |
| 260 | y = GET_GBE_FIELD(VT_XY, Y, val); |
| 261 | if (y < vpixen_off) |
| 262 | break; |
| 263 | udelay(1); |
| 264 | } |
| 265 | if (i == 100000) |
| 266 | printk(KERN_ERR |
| 267 | "gbefb: wait for vpixen_off timed out\n"); |
| 268 | for (i = 0; i < 10000; i++) { |
| 269 | val = gbe->vt_xy; |
| 270 | x = GET_GBE_FIELD(VT_XY, X, val); |
| 271 | y = GET_GBE_FIELD(VT_XY, Y, val); |
| 272 | if (y > vpixen_off) |
| 273 | break; |
| 274 | udelay(1); |
| 275 | } |
| 276 | if (i == 10000) |
| 277 | printk(KERN_ERR "gbefb: wait for vpixen_off timed out\n"); |
| 278 | |
| 279 | /* turn off pixel counter */ |
| 280 | val = 0; |
| 281 | SET_GBE_FIELD(VT_XY, FREEZE, val, 1); |
| 282 | gbe->vt_xy = val; |
| 283 | udelay(10000); |
| 284 | for (i = 0; i < 10000; i++) { |
| 285 | val = gbe->vt_xy; |
| 286 | if (GET_GBE_FIELD(VT_XY, FREEZE, val) != 1) |
| 287 | udelay(10); |
| 288 | else |
| 289 | break; |
| 290 | } |
| 291 | if (i == 10000) |
| 292 | printk(KERN_ERR "gbefb: turn off pixel clock timed out\n"); |
| 293 | |
| 294 | /* turn off dot clock */ |
| 295 | val = gbe->dotclock; |
| 296 | SET_GBE_FIELD(DOTCLK, RUN, val, 0); |
| 297 | gbe->dotclock = val; |
| 298 | udelay(10000); |
| 299 | for (i = 0; i < 10000; i++) { |
| 300 | val = gbe->dotclock; |
| 301 | if (GET_GBE_FIELD(DOTCLK, RUN, val)) |
| 302 | udelay(10); |
| 303 | else |
| 304 | break; |
| 305 | } |
| 306 | if (i == 10000) |
| 307 | printk(KERN_ERR "gbefb: turn off dotclock timed out\n"); |
| 308 | |
| 309 | /* reset the frame DMA FIFO */ |
| 310 | val = gbe->frm_size_tile; |
| 311 | SET_GBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, val, 1); |
| 312 | gbe->frm_size_tile = val; |
| 313 | SET_GBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, val, 0); |
| 314 | gbe->frm_size_tile = val; |
| 315 | } |
| 316 | |
| 317 | static void gbe_turn_on(void) |
| 318 | { |
| 319 | unsigned int val, i; |
| 320 | |
| 321 | /* |
| 322 | * Check if pixel counter is off, for unknown reason this |
| 323 | * code hangs Visual Workstations |
| 324 | */ |
| 325 | if (gbe_revision < 2) { |
| 326 | val = gbe->vt_xy; |
| 327 | if (GET_GBE_FIELD(VT_XY, FREEZE, val) == 0) |
| 328 | return; |
| 329 | } |
| 330 | |
| 331 | /* turn on dot clock */ |
| 332 | val = gbe->dotclock; |
| 333 | SET_GBE_FIELD(DOTCLK, RUN, val, 1); |
| 334 | gbe->dotclock = val; |
| 335 | udelay(10000); |
| 336 | for (i = 0; i < 10000; i++) { |
| 337 | val = gbe->dotclock; |
| 338 | if (GET_GBE_FIELD(DOTCLK, RUN, val) != 1) |
| 339 | udelay(10); |
| 340 | else |
| 341 | break; |
| 342 | } |
| 343 | if (i == 10000) |
| 344 | printk(KERN_ERR "gbefb: turn on dotclock timed out\n"); |
| 345 | |
| 346 | /* turn on pixel counter */ |
| 347 | val = 0; |
| 348 | SET_GBE_FIELD(VT_XY, FREEZE, val, 0); |
| 349 | gbe->vt_xy = val; |
| 350 | udelay(10000); |
| 351 | for (i = 0; i < 10000; i++) { |
| 352 | val = gbe->vt_xy; |
| 353 | if (GET_GBE_FIELD(VT_XY, FREEZE, val)) |
| 354 | udelay(10); |
| 355 | else |
| 356 | break; |
| 357 | } |
| 358 | if (i == 10000) |
| 359 | printk(KERN_ERR "gbefb: turn on pixel clock timed out\n"); |
| 360 | |
| 361 | /* turn on DMA */ |
| 362 | val = gbe->frm_control; |
| 363 | SET_GBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, val, 1); |
| 364 | gbe->frm_control = val; |
| 365 | udelay(1000); |
| 366 | for (i = 0; i < 10000; i++) { |
| 367 | val = gbe->frm_inhwctrl; |
| 368 | if (GET_GBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, val) != 1) |
| 369 | udelay(10); |
| 370 | else |
| 371 | break; |
| 372 | } |
| 373 | if (i == 10000) |
| 374 | printk(KERN_ERR "gbefb: turn on DMA timed out\n"); |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Blank the display. |
| 379 | */ |
| 380 | static int gbefb_blank(int blank, struct fb_info *info) |
| 381 | { |
| 382 | /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */ |
| 383 | switch (blank) { |
| 384 | case FB_BLANK_UNBLANK: /* unblank */ |
| 385 | gbe_turn_on(); |
| 386 | break; |
| 387 | |
| 388 | case FB_BLANK_NORMAL: /* blank */ |
| 389 | gbe_turn_off(); |
| 390 | break; |
| 391 | |
| 392 | default: |
| 393 | /* Nothing */ |
| 394 | break; |
| 395 | } |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * Setup flatpanel related registers. |
| 401 | */ |
| 402 | static void gbefb_setup_flatpanel(struct gbe_timing_info *timing) |
| 403 | { |
| 404 | int fp_wid, fp_hgt, fp_vbs, fp_vbe; |
| 405 | u32 outputVal = 0; |
| 406 | |
| 407 | SET_GBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal, |
| 408 | (timing->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1); |
| 409 | SET_GBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal, |
| 410 | (timing->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1); |
| 411 | gbe->vt_flags = outputVal; |
| 412 | |
| 413 | /* Turn on the flat panel */ |
| 414 | fp_wid = 1600; |
| 415 | fp_hgt = 1024; |
| 416 | fp_vbs = 0; |
| 417 | fp_vbe = 1600; |
| 418 | timing->pll_m = 4; |
| 419 | timing->pll_n = 1; |
| 420 | timing->pll_p = 0; |
| 421 | |
| 422 | outputVal = 0; |
| 423 | SET_GBE_FIELD(FP_DE, ON, outputVal, fp_vbs); |
| 424 | SET_GBE_FIELD(FP_DE, OFF, outputVal, fp_vbe); |
| 425 | gbe->fp_de = outputVal; |
| 426 | outputVal = 0; |
| 427 | SET_GBE_FIELD(FP_HDRV, OFF, outputVal, fp_wid); |
| 428 | gbe->fp_hdrv = outputVal; |
| 429 | outputVal = 0; |
| 430 | SET_GBE_FIELD(FP_VDRV, ON, outputVal, 1); |
| 431 | SET_GBE_FIELD(FP_VDRV, OFF, outputVal, fp_hgt + 1); |
| 432 | gbe->fp_vdrv = outputVal; |
| 433 | } |
| 434 | |
| 435 | struct gbe_pll_info { |
| 436 | int clock_rate; |
| 437 | int fvco_min; |
| 438 | int fvco_max; |
| 439 | }; |
| 440 | |
| 441 | static struct gbe_pll_info gbe_pll_table[2] = { |
| 442 | { 20, 80, 220 }, |
| 443 | { 27, 80, 220 }, |
| 444 | }; |
| 445 | |
| 446 | static int compute_gbe_timing(struct fb_var_screeninfo *var, |
| 447 | struct gbe_timing_info *timing) |
| 448 | { |
| 449 | int pll_m, pll_n, pll_p, error, best_m, best_n, best_p, best_error; |
| 450 | int pixclock; |
| 451 | struct gbe_pll_info *gbe_pll; |
| 452 | |
| 453 | if (gbe_revision < 2) |
| 454 | gbe_pll = &gbe_pll_table[0]; |
| 455 | else |
| 456 | gbe_pll = &gbe_pll_table[1]; |
| 457 | |
| 458 | /* Determine valid resolution and timing |
| 459 | * GBE crystal runs at 20Mhz or 27Mhz |
| 460 | * pll_m, pll_n, pll_p define the following frequencies |
| 461 | * fvco = pll_m * 20Mhz / pll_n |
| 462 | * fout = fvco / (2**pll_p) */ |
| 463 | best_error = 1000000000; |
| 464 | best_n = best_m = best_p = 0; |
| 465 | for (pll_p = 0; pll_p < 4; pll_p++) |
| 466 | for (pll_m = 1; pll_m < 256; pll_m++) |
| 467 | for (pll_n = 1; pll_n < 64; pll_n++) { |
| 468 | pixclock = (1000000 / gbe_pll->clock_rate) * |
| 469 | (pll_n << pll_p) / pll_m; |
| 470 | |
| 471 | error = var->pixclock - pixclock; |
| 472 | |
| 473 | if (error < 0) |
| 474 | error = -error; |
| 475 | |
| 476 | if (error < best_error && |
| 477 | pll_m / pll_n > |
| 478 | gbe_pll->fvco_min / gbe_pll->clock_rate && |
| 479 | pll_m / pll_n < |
| 480 | gbe_pll->fvco_max / gbe_pll->clock_rate) { |
| 481 | best_error = error; |
| 482 | best_m = pll_m; |
| 483 | best_n = pll_n; |
| 484 | best_p = pll_p; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | if (!best_n || !best_m) |
| 489 | return -EINVAL; /* Resolution to high */ |
| 490 | |
| 491 | pixclock = (1000000 / gbe_pll->clock_rate) * |
| 492 | (best_n << best_p) / best_m; |
| 493 | |
| 494 | /* set video timing information */ |
| 495 | if (timing) { |
| 496 | timing->width = var->xres; |
| 497 | timing->height = var->yres; |
| 498 | timing->pll_m = best_m; |
| 499 | timing->pll_n = best_n; |
| 500 | timing->pll_p = best_p; |
| 501 | timing->cfreq = gbe_pll->clock_rate * 1000 * timing->pll_m / |
| 502 | (timing->pll_n << timing->pll_p); |
| 503 | timing->htotal = var->left_margin + var->xres + |
| 504 | var->right_margin + var->hsync_len; |
| 505 | timing->vtotal = var->upper_margin + var->yres + |
| 506 | var->lower_margin + var->vsync_len; |
| 507 | timing->fields_sec = 1000 * timing->cfreq / timing->htotal * |
| 508 | 1000 / timing->vtotal; |
| 509 | timing->hblank_start = var->xres; |
| 510 | timing->vblank_start = var->yres; |
| 511 | timing->hblank_end = timing->htotal; |
| 512 | timing->hsync_start = var->xres + var->right_margin + 1; |
| 513 | timing->hsync_end = timing->hsync_start + var->hsync_len; |
| 514 | timing->vblank_end = timing->vtotal; |
| 515 | timing->vsync_start = var->yres + var->lower_margin + 1; |
| 516 | timing->vsync_end = timing->vsync_start + var->vsync_len; |
| 517 | } |
| 518 | |
| 519 | return pixclock; |
| 520 | } |
| 521 | |
| 522 | static void gbe_set_timing_info(struct gbe_timing_info *timing) |
| 523 | { |
| 524 | int temp; |
| 525 | unsigned int val; |
| 526 | |
| 527 | /* setup dot clock PLL */ |
| 528 | val = 0; |
| 529 | SET_GBE_FIELD(DOTCLK, M, val, timing->pll_m - 1); |
| 530 | SET_GBE_FIELD(DOTCLK, N, val, timing->pll_n - 1); |
| 531 | SET_GBE_FIELD(DOTCLK, P, val, timing->pll_p); |
| 532 | SET_GBE_FIELD(DOTCLK, RUN, val, 0); /* do not start yet */ |
| 533 | gbe->dotclock = val; |
| 534 | udelay(10000); |
| 535 | |
| 536 | /* setup pixel counter */ |
| 537 | val = 0; |
| 538 | SET_GBE_FIELD(VT_XYMAX, MAXX, val, timing->htotal); |
| 539 | SET_GBE_FIELD(VT_XYMAX, MAXY, val, timing->vtotal); |
| 540 | gbe->vt_xymax = val; |
| 541 | |
| 542 | /* setup video timing signals */ |
| 543 | val = 0; |
| 544 | SET_GBE_FIELD(VT_VSYNC, VSYNC_ON, val, timing->vsync_start); |
| 545 | SET_GBE_FIELD(VT_VSYNC, VSYNC_OFF, val, timing->vsync_end); |
| 546 | gbe->vt_vsync = val; |
| 547 | val = 0; |
| 548 | SET_GBE_FIELD(VT_HSYNC, HSYNC_ON, val, timing->hsync_start); |
| 549 | SET_GBE_FIELD(VT_HSYNC, HSYNC_OFF, val, timing->hsync_end); |
| 550 | gbe->vt_hsync = val; |
| 551 | val = 0; |
| 552 | SET_GBE_FIELD(VT_VBLANK, VBLANK_ON, val, timing->vblank_start); |
| 553 | SET_GBE_FIELD(VT_VBLANK, VBLANK_OFF, val, timing->vblank_end); |
| 554 | gbe->vt_vblank = val; |
| 555 | val = 0; |
| 556 | SET_GBE_FIELD(VT_HBLANK, HBLANK_ON, val, |
| 557 | timing->hblank_start - 5); |
| 558 | SET_GBE_FIELD(VT_HBLANK, HBLANK_OFF, val, |
| 559 | timing->hblank_end - 3); |
| 560 | gbe->vt_hblank = val; |
| 561 | |
| 562 | /* setup internal timing signals */ |
| 563 | val = 0; |
| 564 | SET_GBE_FIELD(VT_VCMAP, VCMAP_ON, val, timing->vblank_start); |
| 565 | SET_GBE_FIELD(VT_VCMAP, VCMAP_OFF, val, timing->vblank_end); |
| 566 | gbe->vt_vcmap = val; |
| 567 | val = 0; |
| 568 | SET_GBE_FIELD(VT_HCMAP, HCMAP_ON, val, timing->hblank_start); |
| 569 | SET_GBE_FIELD(VT_HCMAP, HCMAP_OFF, val, timing->hblank_end); |
| 570 | gbe->vt_hcmap = val; |
| 571 | |
| 572 | val = 0; |
| 573 | temp = timing->vblank_start - timing->vblank_end - 1; |
| 574 | if (temp > 0) |
| 575 | temp = -temp; |
| 576 | |
| 577 | if (flat_panel_enabled) |
| 578 | gbefb_setup_flatpanel(timing); |
| 579 | |
| 580 | SET_GBE_FIELD(DID_START_XY, DID_STARTY, val, (u32) temp); |
| 581 | if (timing->hblank_end >= 20) |
| 582 | SET_GBE_FIELD(DID_START_XY, DID_STARTX, val, |
| 583 | timing->hblank_end - 20); |
| 584 | else |
| 585 | SET_GBE_FIELD(DID_START_XY, DID_STARTX, val, |
| 586 | timing->htotal - (20 - timing->hblank_end)); |
| 587 | gbe->did_start_xy = val; |
| 588 | |
| 589 | val = 0; |
| 590 | SET_GBE_FIELD(CRS_START_XY, CRS_STARTY, val, (u32) (temp + 1)); |
| 591 | if (timing->hblank_end >= GBE_CRS_MAGIC) |
| 592 | SET_GBE_FIELD(CRS_START_XY, CRS_STARTX, val, |
| 593 | timing->hblank_end - GBE_CRS_MAGIC); |
| 594 | else |
| 595 | SET_GBE_FIELD(CRS_START_XY, CRS_STARTX, val, |
| 596 | timing->htotal - (GBE_CRS_MAGIC - |
| 597 | timing->hblank_end)); |
| 598 | gbe->crs_start_xy = val; |
| 599 | |
| 600 | val = 0; |
| 601 | SET_GBE_FIELD(VC_START_XY, VC_STARTY, val, (u32) temp); |
| 602 | SET_GBE_FIELD(VC_START_XY, VC_STARTX, val, timing->hblank_end - 4); |
| 603 | gbe->vc_start_xy = val; |
| 604 | |
| 605 | val = 0; |
| 606 | temp = timing->hblank_end - GBE_PIXEN_MAGIC_ON; |
| 607 | if (temp < 0) |
| 608 | temp += timing->htotal; /* allow blank to wrap around */ |
| 609 | |
| 610 | SET_GBE_FIELD(VT_HPIXEN, HPIXEN_ON, val, temp); |
| 611 | SET_GBE_FIELD(VT_HPIXEN, HPIXEN_OFF, val, |
| 612 | ((temp + timing->width - |
| 613 | GBE_PIXEN_MAGIC_OFF) % timing->htotal)); |
| 614 | gbe->vt_hpixen = val; |
| 615 | |
| 616 | val = 0; |
| 617 | SET_GBE_FIELD(VT_VPIXEN, VPIXEN_ON, val, timing->vblank_end); |
| 618 | SET_GBE_FIELD(VT_VPIXEN, VPIXEN_OFF, val, timing->vblank_start); |
| 619 | gbe->vt_vpixen = val; |
| 620 | |
| 621 | /* turn off sync on green */ |
| 622 | val = 0; |
| 623 | SET_GBE_FIELD(VT_FLAGS, SYNC_LOW, val, 1); |
| 624 | gbe->vt_flags = val; |
| 625 | } |
| 626 | |
| 627 | /* |
| 628 | * Set the hardware according to 'par'. |
| 629 | */ |
| 630 | |
| 631 | static int gbefb_set_par(struct fb_info *info) |
| 632 | { |
| 633 | int i; |
| 634 | unsigned int val; |
| 635 | int wholeTilesX, partTilesX, maxPixelsPerTileX; |
| 636 | int height_pix; |
| 637 | int xpmax, ypmax; /* Monitor resolution */ |
| 638 | int bytesPerPixel; /* Bytes per pixel */ |
| 639 | struct gbefb_par *par = (struct gbefb_par *) info->par; |
| 640 | |
| 641 | compute_gbe_timing(&info->var, &par->timing); |
| 642 | |
| 643 | bytesPerPixel = info->var.bits_per_pixel / 8; |
| 644 | info->fix.line_length = info->var.xres_virtual * bytesPerPixel; |
| 645 | xpmax = par->timing.width; |
| 646 | ypmax = par->timing.height; |
| 647 | |
| 648 | /* turn off GBE */ |
| 649 | gbe_turn_off(); |
| 650 | |
| 651 | /* set timing info */ |
| 652 | gbe_set_timing_info(&par->timing); |
| 653 | |
| 654 | /* initialize DIDs */ |
| 655 | val = 0; |
| 656 | switch (bytesPerPixel) { |
| 657 | case 1: |
| 658 | SET_GBE_FIELD(WID, TYP, val, GBE_CMODE_I8); |
| 659 | break; |
| 660 | case 2: |
| 661 | SET_GBE_FIELD(WID, TYP, val, GBE_CMODE_ARGB5); |
| 662 | break; |
| 663 | case 4: |
| 664 | SET_GBE_FIELD(WID, TYP, val, GBE_CMODE_RGB8); |
| 665 | break; |
| 666 | } |
| 667 | SET_GBE_FIELD(WID, BUF, val, GBE_BMODE_BOTH); |
| 668 | |
| 669 | for (i = 0; i < 32; i++) |
| 670 | gbe->mode_regs[i] = val; |
| 671 | |
| 672 | /* Initialize interrupts */ |
| 673 | gbe->vt_intr01 = 0xffffffff; |
| 674 | gbe->vt_intr23 = 0xffffffff; |
| 675 | |
| 676 | /* HACK: |
| 677 | The GBE hardware uses a tiled memory to screen mapping. Tiles are |
| 678 | blocks of 512x128, 256x128 or 128x128 pixels, respectively for 8bit, |
| 679 | 16bit and 32 bit modes (64 kB). They cover the screen with partial |
| 680 | tiles on the right and/or bottom of the screen if needed. |
| 681 | For exemple in 640x480 8 bit mode the mapping is: |
| 682 | |
| 683 | <-------- 640 -----> |
| 684 | <---- 512 ----><128|384 offscreen> |
| 685 | ^ ^ |
| 686 | | 128 [tile 0] [tile 1] |
| 687 | | v |
| 688 | ^ |
| 689 | 4 128 [tile 2] [tile 3] |
| 690 | 8 v |
| 691 | 0 ^ |
| 692 | 128 [tile 4] [tile 5] |
| 693 | | v |
| 694 | | ^ |
| 695 | v 96 [tile 6] [tile 7] |
| 696 | 32 offscreen |
| 697 | |
| 698 | Tiles have the advantage that they can be allocated individually in |
| 699 | memory. However, this mapping is not linear at all, which is not |
| 700 | really convienient. In order to support linear addressing, the GBE |
| 701 | DMA hardware is fooled into thinking the screen is only one tile |
| 702 | large and but has a greater height, so that the DMA transfer covers |
| 703 | the same region. |
| 704 | Tiles are still allocated as independent chunks of 64KB of |
| 705 | continuous physical memory and remapped so that the kernel sees the |
| 706 | framebuffer as a continuous virtual memory. The GBE tile table is |
| 707 | set up so that each tile references one of these 64k blocks: |
| 708 | |
| 709 | GBE -> tile list framebuffer TLB <------------ CPU |
| 710 | [ tile 0 ] -> [ 64KB ] <- [ 16x 4KB page entries ] ^ |
| 711 | ... ... ... linear virtual FB |
| 712 | [ tile n ] -> [ 64KB ] <- [ 16x 4KB page entries ] v |
| 713 | |
| 714 | |
| 715 | The GBE hardware is then told that the buffer is 512*tweaked_height, |
| 716 | with tweaked_height = real_width*real_height/pixels_per_tile. |
| 717 | Thus the GBE hardware will scan the first tile, filing the first 64k |
| 718 | covered region of the screen, and then will proceed to the next |
| 719 | tile, until the whole screen is covered. |
| 720 | |
| 721 | Here is what would happen at 640x480 8bit: |
| 722 | |
| 723 | normal tiling linear |
| 724 | ^ 11111111111111112222 11111111111111111111 ^ |
| 725 | 128 11111111111111112222 11111111111111111111 102 lines |
| 726 | 11111111111111112222 11111111111111111111 v |
| 727 | V 11111111111111112222 11111111222222222222 |
| 728 | 33333333333333334444 22222222222222222222 |
| 729 | 33333333333333334444 22222222222222222222 |
| 730 | < 512 > < 256 > 102*640+256 = 64k |
| 731 | |
| 732 | NOTE: The only mode for which this is not working is 800x600 8bit, |
| 733 | as 800*600/512 = 937.5 which is not integer and thus causes |
| 734 | flickering. |
| 735 | I guess this is not so important as one can use 640x480 8bit or |
| 736 | 800x600 16bit anyway. |
| 737 | */ |
| 738 | |
| 739 | /* Tell gbe about the tiles table location */ |
| 740 | /* tile_ptr -> [ tile 1 ] -> FB mem */ |
| 741 | /* [ tile 2 ] -> FB mem */ |
| 742 | /* ... */ |
| 743 | val = 0; |
| 744 | SET_GBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, val, gbe_tiles.dma >> 9); |
| 745 | SET_GBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, val, 0); /* do not start */ |
| 746 | SET_GBE_FIELD(FRM_CONTROL, FRM_LINEAR, val, 0); |
| 747 | gbe->frm_control = val; |
| 748 | |
| 749 | maxPixelsPerTileX = 512 / bytesPerPixel; |
| 750 | wholeTilesX = 1; |
| 751 | partTilesX = 0; |
| 752 | |
| 753 | /* Initialize the framebuffer */ |
| 754 | val = 0; |
| 755 | SET_GBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, val, wholeTilesX); |
| 756 | SET_GBE_FIELD(FRM_SIZE_TILE, FRM_RHS, val, partTilesX); |
| 757 | |
| 758 | switch (bytesPerPixel) { |
| 759 | case 1: |
| 760 | SET_GBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, val, |
| 761 | GBE_FRM_DEPTH_8); |
| 762 | break; |
| 763 | case 2: |
| 764 | SET_GBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, val, |
| 765 | GBE_FRM_DEPTH_16); |
| 766 | break; |
| 767 | case 4: |
| 768 | SET_GBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, val, |
| 769 | GBE_FRM_DEPTH_32); |
| 770 | break; |
| 771 | } |
| 772 | gbe->frm_size_tile = val; |
| 773 | |
| 774 | /* compute tweaked height */ |
| 775 | height_pix = xpmax * ypmax / maxPixelsPerTileX; |
| 776 | |
| 777 | val = 0; |
| 778 | SET_GBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, val, height_pix); |
| 779 | gbe->frm_size_pixel = val; |
| 780 | |
| 781 | /* turn off DID and overlay DMA */ |
| 782 | gbe->did_control = 0; |
| 783 | gbe->ovr_width_tile = 0; |
| 784 | |
| 785 | /* Turn off mouse cursor */ |
| 786 | gbe->crs_ctl = 0; |
| 787 | |
| 788 | /* Turn on GBE */ |
| 789 | gbe_turn_on(); |
| 790 | |
| 791 | /* Initialize the gamma map */ |
| 792 | udelay(10); |
| 793 | for (i = 0; i < 256; i++) |
| 794 | gbe->gmap[i] = (i << 24) | (i << 16) | (i << 8); |
| 795 | |
| 796 | /* Initialize the color map */ |
| 797 | for (i = 0; i < 256; i++) { |
| 798 | int j; |
| 799 | |
| 800 | for (j = 0; j < 1000 && gbe->cm_fifo >= 63; j++) |
| 801 | udelay(10); |
| 802 | if (j == 1000) |
| 803 | printk(KERN_ERR "gbefb: cmap FIFO timeout\n"); |
| 804 | |
| 805 | gbe->cmap[i] = (i << 8) | (i << 16) | (i << 24); |
| 806 | } |
| 807 | |
| 808 | return 0; |
| 809 | } |
| 810 | |
| 811 | static void gbefb_encode_fix(struct fb_fix_screeninfo *fix, |
| 812 | struct fb_var_screeninfo *var) |
| 813 | { |
| 814 | memset(fix, 0, sizeof(struct fb_fix_screeninfo)); |
| 815 | strcpy(fix->id, "SGI GBE"); |
| 816 | fix->smem_start = (unsigned long) gbe_mem; |
| 817 | fix->smem_len = gbe_mem_size; |
| 818 | fix->type = FB_TYPE_PACKED_PIXELS; |
| 819 | fix->type_aux = 0; |
| 820 | fix->accel = FB_ACCEL_NONE; |
| 821 | switch (var->bits_per_pixel) { |
| 822 | case 8: |
| 823 | fix->visual = FB_VISUAL_PSEUDOCOLOR; |
| 824 | break; |
| 825 | default: |
| 826 | fix->visual = FB_VISUAL_TRUECOLOR; |
| 827 | break; |
| 828 | } |
| 829 | fix->ywrapstep = 0; |
| 830 | fix->xpanstep = 0; |
| 831 | fix->ypanstep = 0; |
| 832 | fix->line_length = var->xres_virtual * var->bits_per_pixel / 8; |
| 833 | fix->mmio_start = GBE_BASE; |
| 834 | fix->mmio_len = sizeof(struct sgi_gbe); |
| 835 | } |
| 836 | |
| 837 | /* |
| 838 | * Set a single color register. The values supplied are already |
| 839 | * rounded down to the hardware's capabilities (according to the |
| 840 | * entries in the var structure). Return != 0 for invalid regno. |
| 841 | */ |
| 842 | |
| 843 | static int gbefb_setcolreg(unsigned regno, unsigned red, unsigned green, |
| 844 | unsigned blue, unsigned transp, |
| 845 | struct fb_info *info) |
| 846 | { |
| 847 | int i; |
| 848 | |
| 849 | if (regno > 255) |
| 850 | return 1; |
| 851 | red >>= 8; |
| 852 | green >>= 8; |
| 853 | blue >>= 8; |
| 854 | |
| 855 | switch (info->var.bits_per_pixel) { |
| 856 | case 8: |
| 857 | /* wait for the color map FIFO to have a free entry */ |
| 858 | for (i = 0; i < 1000 && gbe->cm_fifo >= 63; i++) |
| 859 | udelay(10); |
| 860 | if (i == 1000) { |
| 861 | printk(KERN_ERR "gbefb: cmap FIFO timeout\n"); |
| 862 | return 1; |
| 863 | } |
| 864 | gbe->cmap[regno] = (red << 24) | (green << 16) | (blue << 8); |
| 865 | break; |
| 866 | case 15: |
| 867 | case 16: |
| 868 | red >>= 3; |
| 869 | green >>= 3; |
| 870 | blue >>= 3; |
| 871 | pseudo_palette[regno] = |
| 872 | (red << info->var.red.offset) | |
| 873 | (green << info->var.green.offset) | |
| 874 | (blue << info->var.blue.offset); |
| 875 | break; |
| 876 | case 32: |
| 877 | pseudo_palette[regno] = |
| 878 | (red << info->var.red.offset) | |
| 879 | (green << info->var.green.offset) | |
| 880 | (blue << info->var.blue.offset); |
| 881 | break; |
| 882 | } |
| 883 | |
| 884 | return 0; |
| 885 | } |
| 886 | |
| 887 | /* |
| 888 | * Check video mode validity, eventually modify var to best match. |
| 889 | */ |
| 890 | static int gbefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) |
| 891 | { |
| 892 | unsigned int line_length; |
| 893 | struct gbe_timing_info timing; |
| 894 | |
| 895 | /* Limit bpp to 8, 16, and 32 */ |
| 896 | if (var->bits_per_pixel <= 8) |
| 897 | var->bits_per_pixel = 8; |
| 898 | else if (var->bits_per_pixel <= 16) |
| 899 | var->bits_per_pixel = 16; |
| 900 | else if (var->bits_per_pixel <= 32) |
| 901 | var->bits_per_pixel = 32; |
| 902 | else |
| 903 | return -EINVAL; |
| 904 | |
| 905 | /* Check the mode can be mapped linearly with the tile table trick. */ |
| 906 | /* This requires width x height x bytes/pixel be a multiple of 512 */ |
| 907 | if ((var->xres * var->yres * var->bits_per_pixel) & 4095) |
| 908 | return -EINVAL; |
| 909 | |
| 910 | var->grayscale = 0; /* No grayscale for now */ |
| 911 | |
| 912 | if ((var->pixclock = compute_gbe_timing(var, &timing)) < 0) |
| 913 | return(-EINVAL); |
| 914 | |
| 915 | /* Adjust virtual resolution, if necessary */ |
| 916 | if (var->xres > var->xres_virtual || (!ywrap && !ypan)) |
| 917 | var->xres_virtual = var->xres; |
| 918 | if (var->yres > var->yres_virtual || (!ywrap && !ypan)) |
| 919 | var->yres_virtual = var->yres; |
| 920 | |
| 921 | if (var->vmode & FB_VMODE_CONUPDATE) { |
| 922 | var->vmode |= FB_VMODE_YWRAP; |
| 923 | var->xoffset = info->var.xoffset; |
| 924 | var->yoffset = info->var.yoffset; |
| 925 | } |
| 926 | |
| 927 | /* No grayscale for now */ |
| 928 | var->grayscale = 0; |
| 929 | |
| 930 | /* Memory limit */ |
| 931 | line_length = var->xres_virtual * var->bits_per_pixel / 8; |
| 932 | if (line_length * var->yres_virtual > gbe_mem_size) |
| 933 | return -ENOMEM; /* Virtual resolution too high */ |
| 934 | |
| 935 | switch (var->bits_per_pixel) { |
| 936 | case 8: |
| 937 | var->red.offset = 0; |
| 938 | var->red.length = 8; |
| 939 | var->green.offset = 0; |
| 940 | var->green.length = 8; |
| 941 | var->blue.offset = 0; |
| 942 | var->blue.length = 8; |
| 943 | var->transp.offset = 0; |
| 944 | var->transp.length = 0; |
| 945 | break; |
| 946 | case 16: /* RGB 1555 */ |
| 947 | var->red.offset = 10; |
| 948 | var->red.length = 5; |
| 949 | var->green.offset = 5; |
| 950 | var->green.length = 5; |
| 951 | var->blue.offset = 0; |
| 952 | var->blue.length = 5; |
| 953 | var->transp.offset = 0; |
| 954 | var->transp.length = 0; |
| 955 | break; |
| 956 | case 32: /* RGB 8888 */ |
| 957 | var->red.offset = 24; |
| 958 | var->red.length = 8; |
| 959 | var->green.offset = 16; |
| 960 | var->green.length = 8; |
| 961 | var->blue.offset = 8; |
| 962 | var->blue.length = 8; |
| 963 | var->transp.offset = 0; |
| 964 | var->transp.length = 8; |
| 965 | break; |
| 966 | } |
| 967 | var->red.msb_right = 0; |
| 968 | var->green.msb_right = 0; |
| 969 | var->blue.msb_right = 0; |
| 970 | var->transp.msb_right = 0; |
| 971 | |
| 972 | var->left_margin = timing.htotal - timing.hsync_end; |
| 973 | var->right_margin = timing.hsync_start - timing.width; |
| 974 | var->upper_margin = timing.vtotal - timing.vsync_end; |
| 975 | var->lower_margin = timing.vsync_start - timing.height; |
| 976 | var->hsync_len = timing.hsync_end - timing.hsync_start; |
| 977 | var->vsync_len = timing.vsync_end - timing.vsync_start; |
| 978 | |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | static int gbefb_mmap(struct fb_info *info, struct file *file, |
| 983 | struct vm_area_struct *vma) |
| 984 | { |
| 985 | unsigned long size = vma->vm_end - vma->vm_start; |
| 986 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; |
| 987 | unsigned long addr; |
| 988 | unsigned long phys_addr, phys_size; |
| 989 | u16 *tile; |
| 990 | |
| 991 | /* check range */ |
| 992 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) |
| 993 | return -EINVAL; |
| 994 | if (offset + size > gbe_mem_size) |
| 995 | return -EINVAL; |
| 996 | |
| 997 | /* remap using the fastest write-through mode on architecture */ |
| 998 | /* try not polluting the cache when possible */ |
| 999 | pgprot_val(vma->vm_page_prot) = |
| 1000 | pgprot_fb(pgprot_val(vma->vm_page_prot)); |
| 1001 | |
| 1002 | vma->vm_flags |= VM_IO | VM_RESERVED; |
| 1003 | vma->vm_file = file; |
| 1004 | |
| 1005 | /* look for the starting tile */ |
| 1006 | tile = &gbe_tiles.cpu[offset >> TILE_SHIFT]; |
| 1007 | addr = vma->vm_start; |
| 1008 | offset &= TILE_MASK; |
| 1009 | |
| 1010 | /* remap each tile separately */ |
| 1011 | do { |
| 1012 | phys_addr = (((unsigned long) (*tile)) << TILE_SHIFT) + offset; |
| 1013 | if ((offset + size) < TILE_SIZE) |
| 1014 | phys_size = size; |
| 1015 | else |
| 1016 | phys_size = TILE_SIZE - offset; |
| 1017 | |
| 1018 | if (remap_pfn_range(vma, addr, phys_addr >> PAGE_SHIFT, |
| 1019 | phys_size, vma->vm_page_prot)) |
| 1020 | return -EAGAIN; |
| 1021 | |
| 1022 | offset = 0; |
| 1023 | size -= phys_size; |
| 1024 | addr += phys_size; |
| 1025 | tile++; |
| 1026 | } while (size); |
| 1027 | |
| 1028 | return 0; |
| 1029 | } |
| 1030 | |
| 1031 | static struct fb_ops gbefb_ops = { |
| 1032 | .owner = THIS_MODULE, |
| 1033 | .fb_check_var = gbefb_check_var, |
| 1034 | .fb_set_par = gbefb_set_par, |
| 1035 | .fb_setcolreg = gbefb_setcolreg, |
| 1036 | .fb_mmap = gbefb_mmap, |
| 1037 | .fb_blank = gbefb_blank, |
| 1038 | .fb_fillrect = cfb_fillrect, |
| 1039 | .fb_copyarea = cfb_copyarea, |
| 1040 | .fb_imageblit = cfb_imageblit, |
| 1041 | .fb_cursor = soft_cursor, |
| 1042 | }; |
| 1043 | |
| 1044 | /* |
| 1045 | * sysfs |
| 1046 | */ |
| 1047 | |
| 1048 | static ssize_t gbefb_show_memsize(struct device *dev, char *buf) |
| 1049 | { |
| 1050 | return snprintf(buf, PAGE_SIZE, "%d\n", gbe_mem_size); |
| 1051 | } |
| 1052 | |
| 1053 | static DEVICE_ATTR(size, S_IRUGO, gbefb_show_memsize, NULL); |
| 1054 | |
| 1055 | static ssize_t gbefb_show_rev(struct device *device, char *buf) |
| 1056 | { |
| 1057 | return snprintf(buf, PAGE_SIZE, "%d\n", gbe_revision); |
| 1058 | } |
| 1059 | |
| 1060 | static DEVICE_ATTR(revision, S_IRUGO, gbefb_show_rev, NULL); |
| 1061 | |
| 1062 | static void __devexit gbefb_remove_sysfs(struct device *dev) |
| 1063 | { |
| 1064 | device_remove_file(dev, &dev_attr_size); |
| 1065 | device_remove_file(dev, &dev_attr_revision); |
| 1066 | } |
| 1067 | |
| 1068 | static void gbefb_create_sysfs(struct device *dev) |
| 1069 | { |
| 1070 | device_create_file(dev, &dev_attr_size); |
| 1071 | device_create_file(dev, &dev_attr_revision); |
| 1072 | } |
| 1073 | |
| 1074 | /* |
| 1075 | * Initialization |
| 1076 | */ |
| 1077 | |
| 1078 | int __init gbefb_setup(char *options) |
| 1079 | { |
| 1080 | char *this_opt; |
| 1081 | |
| 1082 | if (!options || !*options) |
| 1083 | return 0; |
| 1084 | |
| 1085 | while ((this_opt = strsep(&options, ",")) != NULL) { |
| 1086 | if (!strncmp(this_opt, "monitor:", 8)) { |
| 1087 | if (!strncmp(this_opt + 8, "crt", 3)) { |
| 1088 | flat_panel_enabled = 0; |
| 1089 | default_var = &default_var_CRT; |
| 1090 | default_mode = &default_mode_CRT; |
| 1091 | } else if (!strncmp(this_opt + 8, "1600sw", 6) || |
| 1092 | !strncmp(this_opt + 8, "lcd", 3)) { |
| 1093 | flat_panel_enabled = 1; |
| 1094 | default_var = &default_var_LCD; |
| 1095 | default_mode = &default_mode_LCD; |
| 1096 | } |
| 1097 | } else if (!strncmp(this_opt, "mem:", 4)) { |
| 1098 | gbe_mem_size = memparse(this_opt + 4, &this_opt); |
| 1099 | if (gbe_mem_size > CONFIG_FB_GBE_MEM * 1024 * 1024) |
| 1100 | gbe_mem_size = CONFIG_FB_GBE_MEM * 1024 * 1024; |
| 1101 | if (gbe_mem_size < TILE_SIZE) |
| 1102 | gbe_mem_size = TILE_SIZE; |
| 1103 | } else |
| 1104 | mode_option = this_opt; |
| 1105 | } |
| 1106 | return 0; |
| 1107 | } |
| 1108 | |
| 1109 | static int __init gbefb_probe(struct device *dev) |
| 1110 | { |
| 1111 | int i, ret = 0; |
| 1112 | struct fb_info *info; |
| 1113 | struct gbefb_par *par; |
| 1114 | struct platform_device *p_dev = to_platform_device(dev); |
| 1115 | #ifndef MODULE |
| 1116 | char *options = NULL; |
| 1117 | #endif |
| 1118 | |
| 1119 | info = framebuffer_alloc(sizeof(struct gbefb_par), &p_dev->dev); |
| 1120 | if (!info) |
| 1121 | return -ENOMEM; |
| 1122 | |
| 1123 | #ifndef MODULE |
| 1124 | if (fb_get_options("gbefb", &options)) |
| 1125 | return -ENODEV; |
| 1126 | gbefb_setup(options); |
| 1127 | #endif |
| 1128 | |
| 1129 | if (!request_mem_region(GBE_BASE, sizeof(struct sgi_gbe), "GBE")) { |
| 1130 | printk(KERN_ERR "gbefb: couldn't reserve mmio region\n"); |
| 1131 | ret = -EBUSY; |
| 1132 | goto out_release_framebuffer; |
| 1133 | } |
| 1134 | |
| 1135 | gbe = (struct sgi_gbe *) ioremap(GBE_BASE, sizeof(struct sgi_gbe)); |
| 1136 | if (!gbe) { |
| 1137 | printk(KERN_ERR "gbefb: couldn't map mmio region\n"); |
| 1138 | ret = -ENXIO; |
| 1139 | goto out_release_mem_region; |
| 1140 | } |
| 1141 | gbe_revision = gbe->ctrlstat & 15; |
| 1142 | |
| 1143 | gbe_tiles.cpu = |
| 1144 | dma_alloc_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t), |
| 1145 | &gbe_tiles.dma, GFP_KERNEL); |
| 1146 | if (!gbe_tiles.cpu) { |
| 1147 | printk(KERN_ERR "gbefb: couldn't allocate tiles table\n"); |
| 1148 | ret = -ENOMEM; |
| 1149 | goto out_unmap; |
| 1150 | } |
| 1151 | |
| 1152 | if (gbe_mem_phys) { |
| 1153 | /* memory was allocated at boot time */ |
| 1154 | gbe_mem = ioremap_nocache(gbe_mem_phys, gbe_mem_size); |
| 1155 | gbe_dma_addr = 0; |
| 1156 | } else { |
| 1157 | /* try to allocate memory with the classical allocator |
| 1158 | * this has high chance to fail on low memory machines */ |
| 1159 | gbe_mem = dma_alloc_coherent(NULL, gbe_mem_size, &gbe_dma_addr, |
| 1160 | GFP_KERNEL); |
| 1161 | gbe_mem_phys = (unsigned long) gbe_dma_addr; |
| 1162 | } |
| 1163 | |
| 1164 | #ifdef CONFIG_X86 |
| 1165 | mtrr_add(gbe_mem_phys, gbe_mem_size, MTRR_TYPE_WRCOMB, 1); |
| 1166 | #endif |
| 1167 | |
| 1168 | if (!gbe_mem) { |
| 1169 | printk(KERN_ERR "gbefb: couldn't map framebuffer\n"); |
| 1170 | ret = -ENXIO; |
| 1171 | goto out_tiles_free; |
| 1172 | } |
| 1173 | |
| 1174 | /* map framebuffer memory into tiles table */ |
| 1175 | for (i = 0; i < (gbe_mem_size >> TILE_SHIFT); i++) |
| 1176 | gbe_tiles.cpu[i] = (gbe_mem_phys >> TILE_SHIFT) + i; |
| 1177 | |
| 1178 | info->fbops = &gbefb_ops; |
| 1179 | info->pseudo_palette = pseudo_palette; |
| 1180 | info->flags = FBINFO_DEFAULT; |
| 1181 | info->screen_base = gbe_mem; |
| 1182 | fb_alloc_cmap(&info->cmap, 256, 0); |
| 1183 | |
| 1184 | /* reset GBE */ |
| 1185 | gbe_reset(); |
| 1186 | |
| 1187 | par = info->par; |
| 1188 | /* turn on default video mode */ |
| 1189 | if (fb_find_mode(&par->var, info, mode_option, NULL, 0, |
| 1190 | default_mode, 8) == 0) |
| 1191 | par->var = *default_var; |
| 1192 | info->var = par->var; |
| 1193 | gbefb_check_var(&par->var, info); |
| 1194 | gbefb_encode_fix(&info->fix, &info->var); |
| 1195 | |
| 1196 | if (register_framebuffer(info) < 0) { |
| 1197 | printk(KERN_ERR "gbefb: couldn't register framebuffer\n"); |
| 1198 | ret = -ENXIO; |
| 1199 | goto out_gbe_unmap; |
| 1200 | } |
| 1201 | |
| 1202 | dev_set_drvdata(&p_dev->dev, info); |
| 1203 | gbefb_create_sysfs(dev); |
| 1204 | |
| 1205 | printk(KERN_INFO "fb%d: %s rev %d @ 0x%08x using %dkB memory\n", |
| 1206 | info->node, info->fix.id, gbe_revision, (unsigned) GBE_BASE, |
| 1207 | gbe_mem_size >> 10); |
| 1208 | |
| 1209 | return 0; |
| 1210 | |
| 1211 | out_gbe_unmap: |
| 1212 | if (gbe_dma_addr) |
| 1213 | dma_free_coherent(NULL, gbe_mem_size, gbe_mem, gbe_mem_phys); |
| 1214 | else |
| 1215 | iounmap(gbe_mem); |
| 1216 | out_tiles_free: |
| 1217 | dma_free_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t), |
| 1218 | (void *)gbe_tiles.cpu, gbe_tiles.dma); |
| 1219 | out_unmap: |
| 1220 | iounmap(gbe); |
| 1221 | out_release_mem_region: |
| 1222 | release_mem_region(GBE_BASE, sizeof(struct sgi_gbe)); |
| 1223 | out_release_framebuffer: |
| 1224 | framebuffer_release(info); |
| 1225 | |
| 1226 | return ret; |
| 1227 | } |
| 1228 | |
| 1229 | static int __devexit gbefb_remove(struct device* dev) |
| 1230 | { |
| 1231 | struct platform_device *p_dev = to_platform_device(dev); |
| 1232 | struct fb_info *info = dev_get_drvdata(&p_dev->dev); |
| 1233 | |
| 1234 | unregister_framebuffer(info); |
| 1235 | gbe_turn_off(); |
| 1236 | if (gbe_dma_addr) |
| 1237 | dma_free_coherent(NULL, gbe_mem_size, gbe_mem, gbe_mem_phys); |
| 1238 | else |
| 1239 | iounmap(gbe_mem); |
| 1240 | dma_free_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t), |
| 1241 | (void *)gbe_tiles.cpu, gbe_tiles.dma); |
| 1242 | release_mem_region(GBE_BASE, sizeof(struct sgi_gbe)); |
| 1243 | iounmap(gbe); |
| 1244 | gbefb_remove_sysfs(dev); |
| 1245 | framebuffer_release(info); |
| 1246 | |
| 1247 | return 0; |
| 1248 | } |
| 1249 | |
| 1250 | static struct device_driver gbefb_driver = { |
| 1251 | .name = "gbefb", |
| 1252 | .bus = &platform_bus_type, |
| 1253 | .probe = gbefb_probe, |
| 1254 | .remove = __devexit_p(gbefb_remove), |
| 1255 | }; |
| 1256 | |
| 1257 | static struct platform_device gbefb_device = { |
| 1258 | .name = "gbefb", |
| 1259 | }; |
| 1260 | |
| 1261 | int __init gbefb_init(void) |
| 1262 | { |
| 1263 | int ret = driver_register(&gbefb_driver); |
| 1264 | if (!ret) { |
| 1265 | ret = platform_device_register(&gbefb_device); |
| 1266 | if (ret) |
| 1267 | driver_unregister(&gbefb_driver); |
| 1268 | } |
| 1269 | return ret; |
| 1270 | } |
| 1271 | |
| 1272 | void __exit gbefb_exit(void) |
| 1273 | { |
| 1274 | driver_unregister(&gbefb_driver); |
| 1275 | } |
| 1276 | |
| 1277 | module_init(gbefb_init); |
| 1278 | module_exit(gbefb_exit); |
| 1279 | |
| 1280 | MODULE_LICENSE("GPL"); |