1/* 2 * linux/drivers/video/ep93xx-fb.c 3 * 4 * Framebuffer support for the EP93xx series. 5 * 6 * Copyright (C) 2007 Bluewater Systems Ltd 7 * Author: Ryan Mallon 8 * 9 * Copyright (c) 2009 H Hartley Sweeten <hsweeten@visionengravers.com> 10 * 11 * Based on the Cirrus Logic ep93xxfb driver, and various other ep93xxfb 12 * drivers. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 */ 19 20#include <linux/platform_device.h> 21#include <linux/module.h> 22#include <linux/dma-mapping.h> 23#include <linux/slab.h> 24#include <linux/clk.h> 25#include <linux/fb.h> 26#include <linux/io.h> 27 28#include <linux/platform_data/video-ep93xx.h> 29 30/* Vertical Frame Timing Registers */ 31#define EP93XXFB_VLINES_TOTAL 0x0000 /* SW locked */ 32#define EP93XXFB_VSYNC 0x0004 /* SW locked */ 33#define EP93XXFB_VACTIVE 0x0008 /* SW locked */ 34#define EP93XXFB_VBLANK 0x0228 /* SW locked */ 35#define EP93XXFB_VCLK 0x000c /* SW locked */ 36 37/* Horizontal Frame Timing Registers */ 38#define EP93XXFB_HCLKS_TOTAL 0x0010 /* SW locked */ 39#define EP93XXFB_HSYNC 0x0014 /* SW locked */ 40#define EP93XXFB_HACTIVE 0x0018 /* SW locked */ 41#define EP93XXFB_HBLANK 0x022c /* SW locked */ 42#define EP93XXFB_HCLK 0x001c /* SW locked */ 43 44/* Frame Buffer Memory Configuration Registers */ 45#define EP93XXFB_SCREEN_PAGE 0x0028 46#define EP93XXFB_SCREEN_HPAGE 0x002c 47#define EP93XXFB_SCREEN_LINES 0x0030 48#define EP93XXFB_LINE_LENGTH 0x0034 49#define EP93XXFB_VLINE_STEP 0x0038 50#define EP93XXFB_LINE_CARRY 0x003c /* SW locked */ 51#define EP93XXFB_EOL_OFFSET 0x0230 52 53/* Other Video Registers */ 54#define EP93XXFB_BRIGHTNESS 0x0020 55#define EP93XXFB_ATTRIBS 0x0024 /* SW locked */ 56#define EP93XXFB_SWLOCK 0x007c /* SW locked */ 57#define EP93XXFB_AC_RATE 0x0214 58#define EP93XXFB_FIFO_LEVEL 0x0234 59#define EP93XXFB_PIXELMODE 0x0054 60#define EP93XXFB_PIXELMODE_32BPP (0x7 << 0) 61#define EP93XXFB_PIXELMODE_24BPP (0x6 << 0) 62#define EP93XXFB_PIXELMODE_16BPP (0x4 << 0) 63#define EP93XXFB_PIXELMODE_8BPP (0x2 << 0) 64#define EP93XXFB_PIXELMODE_SHIFT_1P_24B (0x0 << 3) 65#define EP93XXFB_PIXELMODE_SHIFT_1P_18B (0x1 << 3) 66#define EP93XXFB_PIXELMODE_COLOR_LUT (0x0 << 10) 67#define EP93XXFB_PIXELMODE_COLOR_888 (0x4 << 10) 68#define EP93XXFB_PIXELMODE_COLOR_555 (0x5 << 10) 69#define EP93XXFB_PARL_IF_OUT 0x0058 70#define EP93XXFB_PARL_IF_IN 0x005c 71 72/* Blink Control Registers */ 73#define EP93XXFB_BLINK_RATE 0x0040 74#define EP93XXFB_BLINK_MASK 0x0044 75#define EP93XXFB_BLINK_PATTRN 0x0048 76#define EP93XXFB_PATTRN_MASK 0x004c 77#define EP93XXFB_BKGRND_OFFSET 0x0050 78 79/* Hardware Cursor Registers */ 80#define EP93XXFB_CURSOR_ADR_START 0x0060 81#define EP93XXFB_CURSOR_ADR_RESET 0x0064 82#define EP93XXFB_CURSOR_SIZE 0x0068 83#define EP93XXFB_CURSOR_COLOR1 0x006c 84#define EP93XXFB_CURSOR_COLOR2 0x0070 85#define EP93XXFB_CURSOR_BLINK_COLOR1 0x021c 86#define EP93XXFB_CURSOR_BLINK_COLOR2 0x0220 87#define EP93XXFB_CURSOR_XY_LOC 0x0074 88#define EP93XXFB_CURSOR_DSCAN_HY_LOC 0x0078 89#define EP93XXFB_CURSOR_BLINK_RATE_CTRL 0x0224 90 91/* LUT Registers */ 92#define EP93XXFB_GRY_SCL_LUTR 0x0080 93#define EP93XXFB_GRY_SCL_LUTG 0x0280 94#define EP93XXFB_GRY_SCL_LUTB 0x0300 95#define EP93XXFB_LUT_SW_CONTROL 0x0218 96#define EP93XXFB_LUT_SW_CONTROL_SWTCH (1 << 0) 97#define EP93XXFB_LUT_SW_CONTROL_SSTAT (1 << 1) 98#define EP93XXFB_COLOR_LUT 0x0400 99 100/* Video Signature Registers */ 101#define EP93XXFB_VID_SIG_RSLT_VAL 0x0200 102#define EP93XXFB_VID_SIG_CTRL 0x0204 103#define EP93XXFB_VSIG 0x0208 104#define EP93XXFB_HSIG 0x020c 105#define EP93XXFB_SIG_CLR_STR 0x0210 106 107/* Minimum / Maximum resolutions supported */ 108#define EP93XXFB_MIN_XRES 64 109#define EP93XXFB_MIN_YRES 64 110#define EP93XXFB_MAX_XRES 1024 111#define EP93XXFB_MAX_YRES 768 112 113struct ep93xx_fbi { 114 struct ep93xxfb_mach_info *mach_info; 115 struct clk *clk; 116 struct resource *res; 117 void __iomem *mmio_base; 118 unsigned int pseudo_palette[256]; 119}; 120 121static int check_screenpage_bug = 1; 122module_param(check_screenpage_bug, int, 0644); 123MODULE_PARM_DESC(check_screenpage_bug, 124 "Check for bit 27 screen page bug. Default = 1"); 125 126static inline unsigned int ep93xxfb_readl(struct ep93xx_fbi *fbi, 127 unsigned int off) 128{ 129 return __raw_readl(fbi->mmio_base + off); 130} 131 132static inline void ep93xxfb_writel(struct ep93xx_fbi *fbi, 133 unsigned int val, unsigned int off) 134{ 135 __raw_writel(val, fbi->mmio_base + off); 136} 137 138/* 139 * Write to one of the locked raster registers. 140 */ 141static inline void ep93xxfb_out_locked(struct ep93xx_fbi *fbi, 142 unsigned int val, unsigned int reg) 143{ 144 /* 145 * We don't need a lock or delay here since the raster register 146 * block will remain unlocked until the next access. 147 */ 148 ep93xxfb_writel(fbi, 0xaa, EP93XXFB_SWLOCK); 149 ep93xxfb_writel(fbi, val, reg); 150} 151 152static void ep93xxfb_set_video_attribs(struct fb_info *info) 153{ 154 struct ep93xx_fbi *fbi = info->par; 155 unsigned int attribs; 156 157 attribs = EP93XXFB_ENABLE; 158 attribs |= fbi->mach_info->flags; 159 ep93xxfb_out_locked(fbi, attribs, EP93XXFB_ATTRIBS); 160} 161 162static int ep93xxfb_set_pixelmode(struct fb_info *info) 163{ 164 struct ep93xx_fbi *fbi = info->par; 165 unsigned int val; 166 167 info->var.transp.offset = 0; 168 info->var.transp.length = 0; 169 170 switch (info->var.bits_per_pixel) { 171 case 8: 172 val = EP93XXFB_PIXELMODE_8BPP | EP93XXFB_PIXELMODE_COLOR_LUT | 173 EP93XXFB_PIXELMODE_SHIFT_1P_18B; 174 175 info->var.red.offset = 0; 176 info->var.red.length = 8; 177 info->var.green.offset = 0; 178 info->var.green.length = 8; 179 info->var.blue.offset = 0; 180 info->var.blue.length = 8; 181 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 182 break; 183 184 case 16: 185 val = EP93XXFB_PIXELMODE_16BPP | EP93XXFB_PIXELMODE_COLOR_555 | 186 EP93XXFB_PIXELMODE_SHIFT_1P_18B; 187 188 info->var.red.offset = 11; 189 info->var.red.length = 5; 190 info->var.green.offset = 5; 191 info->var.green.length = 6; 192 info->var.blue.offset = 0; 193 info->var.blue.length = 5; 194 info->fix.visual = FB_VISUAL_TRUECOLOR; 195 break; 196 197 case 24: 198 val = EP93XXFB_PIXELMODE_24BPP | EP93XXFB_PIXELMODE_COLOR_888 | 199 EP93XXFB_PIXELMODE_SHIFT_1P_24B; 200 201 info->var.red.offset = 16; 202 info->var.red.length = 8; 203 info->var.green.offset = 8; 204 info->var.green.length = 8; 205 info->var.blue.offset = 0; 206 info->var.blue.length = 8; 207 info->fix.visual = FB_VISUAL_TRUECOLOR; 208 break; 209 210 case 32: 211 val = EP93XXFB_PIXELMODE_32BPP | EP93XXFB_PIXELMODE_COLOR_888 | 212 EP93XXFB_PIXELMODE_SHIFT_1P_24B; 213 214 info->var.red.offset = 16; 215 info->var.red.length = 8; 216 info->var.green.offset = 8; 217 info->var.green.length = 8; 218 info->var.blue.offset = 0; 219 info->var.blue.length = 8; 220 info->fix.visual = FB_VISUAL_TRUECOLOR; 221 break; 222 223 default: 224 return -EINVAL; 225 } 226 227 ep93xxfb_writel(fbi, val, EP93XXFB_PIXELMODE); 228 return 0; 229} 230 231static void ep93xxfb_set_timing(struct fb_info *info) 232{ 233 struct ep93xx_fbi *fbi = info->par; 234 unsigned int vlines_total, hclks_total, start, stop; 235 236 vlines_total = info->var.yres + info->var.upper_margin + 237 info->var.lower_margin + info->var.vsync_len - 1; 238 239 hclks_total = info->var.xres + info->var.left_margin + 240 info->var.right_margin + info->var.hsync_len - 1; 241 242 ep93xxfb_out_locked(fbi, vlines_total, EP93XXFB_VLINES_TOTAL); 243 ep93xxfb_out_locked(fbi, hclks_total, EP93XXFB_HCLKS_TOTAL); 244 245 start = vlines_total; 246 stop = vlines_total - info->var.vsync_len; 247 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VSYNC); 248 249 start = vlines_total - info->var.vsync_len - info->var.upper_margin; 250 stop = info->var.lower_margin - 1; 251 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VBLANK); 252 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VACTIVE); 253 254 start = vlines_total; 255 stop = vlines_total + 1; 256 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VCLK); 257 258 start = hclks_total; 259 stop = hclks_total - info->var.hsync_len; 260 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HSYNC); 261 262 start = hclks_total - info->var.hsync_len - info->var.left_margin; 263 stop = info->var.right_margin - 1; 264 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HBLANK); 265 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HACTIVE); 266 267 start = hclks_total; 268 stop = hclks_total; 269 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HCLK); 270 271 ep93xxfb_out_locked(fbi, 0x0, EP93XXFB_LINE_CARRY); 272} 273 274static int ep93xxfb_set_par(struct fb_info *info) 275{ 276 struct ep93xx_fbi *fbi = info->par; 277 278 clk_set_rate(fbi->clk, 1000 * PICOS2KHZ(info->var.pixclock)); 279 280 ep93xxfb_set_timing(info); 281 282 info->fix.line_length = info->var.xres_virtual * 283 info->var.bits_per_pixel / 8; 284 285 ep93xxfb_writel(fbi, info->fix.smem_start, EP93XXFB_SCREEN_PAGE); 286 ep93xxfb_writel(fbi, info->var.yres - 1, EP93XXFB_SCREEN_LINES); 287 ep93xxfb_writel(fbi, ((info->var.xres * info->var.bits_per_pixel) 288 / 32) - 1, EP93XXFB_LINE_LENGTH); 289 ep93xxfb_writel(fbi, info->fix.line_length / 4, EP93XXFB_VLINE_STEP); 290 ep93xxfb_set_video_attribs(info); 291 return 0; 292} 293 294static int ep93xxfb_check_var(struct fb_var_screeninfo *var, 295 struct fb_info *info) 296{ 297 int err; 298 299 err = ep93xxfb_set_pixelmode(info); 300 if (err) 301 return err; 302 303 var->xres = max_t(unsigned int, var->xres, EP93XXFB_MIN_XRES); 304 var->xres = min_t(unsigned int, var->xres, EP93XXFB_MAX_XRES); 305 var->xres_virtual = max(var->xres_virtual, var->xres); 306 307 var->yres = max_t(unsigned int, var->yres, EP93XXFB_MIN_YRES); 308 var->yres = min_t(unsigned int, var->yres, EP93XXFB_MAX_YRES); 309 var->yres_virtual = max(var->yres_virtual, var->yres); 310 311 return 0; 312} 313 314static int ep93xxfb_mmap(struct fb_info *info, struct vm_area_struct *vma) 315{ 316 unsigned int offset = vma->vm_pgoff << PAGE_SHIFT; 317 318 if (offset < info->fix.smem_len) { 319 return dma_mmap_writecombine(info->dev, vma, info->screen_base, 320 info->fix.smem_start, 321 info->fix.smem_len); 322 } 323 324 return -EINVAL; 325} 326 327static int ep93xxfb_blank(int blank_mode, struct fb_info *info) 328{ 329 struct ep93xx_fbi *fbi = info->par; 330 unsigned int attribs = ep93xxfb_readl(fbi, EP93XXFB_ATTRIBS); 331 332 if (blank_mode) { 333 if (fbi->mach_info->blank) 334 fbi->mach_info->blank(blank_mode, info); 335 ep93xxfb_out_locked(fbi, attribs & ~EP93XXFB_ENABLE, 336 EP93XXFB_ATTRIBS); 337 clk_disable(fbi->clk); 338 } else { 339 clk_enable(fbi->clk); 340 ep93xxfb_out_locked(fbi, attribs | EP93XXFB_ENABLE, 341 EP93XXFB_ATTRIBS); 342 if (fbi->mach_info->blank) 343 fbi->mach_info->blank(blank_mode, info); 344 } 345 346 return 0; 347} 348 349static inline int ep93xxfb_convert_color(int val, int width) 350{ 351 return ((val << width) + 0x7fff - val) >> 16; 352} 353 354static int ep93xxfb_setcolreg(unsigned int regno, unsigned int red, 355 unsigned int green, unsigned int blue, 356 unsigned int transp, struct fb_info *info) 357{ 358 struct ep93xx_fbi *fbi = info->par; 359 unsigned int *pal = info->pseudo_palette; 360 unsigned int ctrl, i, rgb, lut_current, lut_stat; 361 362 switch (info->fix.visual) { 363 case FB_VISUAL_PSEUDOCOLOR: 364 if (regno > 255) 365 return 1; 366 rgb = ((red & 0xff00) << 8) | (green & 0xff00) | 367 ((blue & 0xff00) >> 8); 368 369 pal[regno] = rgb; 370 ep93xxfb_writel(fbi, rgb, (EP93XXFB_COLOR_LUT + (regno << 2))); 371 ctrl = ep93xxfb_readl(fbi, EP93XXFB_LUT_SW_CONTROL); 372 lut_stat = !!(ctrl & EP93XXFB_LUT_SW_CONTROL_SSTAT); 373 lut_current = !!(ctrl & EP93XXFB_LUT_SW_CONTROL_SWTCH); 374 375 if (lut_stat == lut_current) { 376 for (i = 0; i < 256; i++) { 377 ep93xxfb_writel(fbi, pal[i], 378 EP93XXFB_COLOR_LUT + (i << 2)); 379 } 380 381 ep93xxfb_writel(fbi, 382 ctrl ^ EP93XXFB_LUT_SW_CONTROL_SWTCH, 383 EP93XXFB_LUT_SW_CONTROL); 384 } 385 break; 386 387 case FB_VISUAL_TRUECOLOR: 388 if (regno > 16) 389 return 1; 390 391 red = ep93xxfb_convert_color(red, info->var.red.length); 392 green = ep93xxfb_convert_color(green, info->var.green.length); 393 blue = ep93xxfb_convert_color(blue, info->var.blue.length); 394 transp = ep93xxfb_convert_color(transp, 395 info->var.transp.length); 396 397 pal[regno] = (red << info->var.red.offset) | 398 (green << info->var.green.offset) | 399 (blue << info->var.blue.offset) | 400 (transp << info->var.transp.offset); 401 break; 402 403 default: 404 return 1; 405 } 406 407 return 0; 408} 409 410static struct fb_ops ep93xxfb_ops = { 411 .owner = THIS_MODULE, 412 .fb_check_var = ep93xxfb_check_var, 413 .fb_set_par = ep93xxfb_set_par, 414 .fb_blank = ep93xxfb_blank, 415 .fb_fillrect = cfb_fillrect, 416 .fb_copyarea = cfb_copyarea, 417 .fb_imageblit = cfb_imageblit, 418 .fb_setcolreg = ep93xxfb_setcolreg, 419 .fb_mmap = ep93xxfb_mmap, 420}; 421 422static int ep93xxfb_calc_fbsize(struct ep93xxfb_mach_info *mach_info) 423{ 424 int i, fb_size = 0; 425 426 if (mach_info->num_modes == EP93XXFB_USE_MODEDB) { 427 fb_size = EP93XXFB_MAX_XRES * EP93XXFB_MAX_YRES * 428 mach_info->bpp / 8; 429 } else { 430 for (i = 0; i < mach_info->num_modes; i++) { 431 const struct fb_videomode *mode; 432 int size; 433 434 mode = &mach_info->modes[i]; 435 size = mode->xres * mode->yres * mach_info->bpp / 8; 436 if (size > fb_size) 437 fb_size = size; 438 } 439 } 440 441 return fb_size; 442} 443 444static int ep93xxfb_alloc_videomem(struct fb_info *info) 445{ 446 struct ep93xx_fbi *fbi = info->par; 447 char __iomem *virt_addr; 448 dma_addr_t phys_addr; 449 unsigned int fb_size; 450 451 fb_size = ep93xxfb_calc_fbsize(fbi->mach_info); 452 virt_addr = dma_alloc_writecombine(info->dev, fb_size, 453 &phys_addr, GFP_KERNEL); 454 if (!virt_addr) 455 return -ENOMEM; 456 457 /* 458 * There is a bug in the ep93xx framebuffer which causes problems 459 * if bit 27 of the physical address is set. 460 * See: http://marc.info/?l=linux-arm-kernel&m=110061245502000&w=2 461 * There does not seem to be any official errata for this, but I 462 * have confirmed the problem exists on my hardware (ep9315) at 463 * least. 464 */ 465 if (check_screenpage_bug && phys_addr & (1 << 27)) { 466 dev_err(info->dev, "ep93xx framebuffer bug. phys addr (0x%x) " 467 "has bit 27 set: cannot init framebuffer\n", 468 phys_addr); 469 470 dma_free_coherent(info->dev, fb_size, virt_addr, phys_addr); 471 return -ENOMEM; 472 } 473 474 info->fix.smem_start = phys_addr; 475 info->fix.smem_len = fb_size; 476 info->screen_base = virt_addr; 477 478 return 0; 479} 480 481static void ep93xxfb_dealloc_videomem(struct fb_info *info) 482{ 483 if (info->screen_base) 484 dma_free_coherent(info->dev, info->fix.smem_len, 485 info->screen_base, info->fix.smem_start); 486} 487 488static int ep93xxfb_probe(struct platform_device *pdev) 489{ 490 struct ep93xxfb_mach_info *mach_info = dev_get_platdata(&pdev->dev); 491 struct fb_info *info; 492 struct ep93xx_fbi *fbi; 493 struct resource *res; 494 char *video_mode; 495 int err; 496 497 if (!mach_info) 498 return -EINVAL; 499 500 info = framebuffer_alloc(sizeof(struct ep93xx_fbi), &pdev->dev); 501 if (!info) 502 return -ENOMEM; 503 504 info->dev = &pdev->dev; 505 platform_set_drvdata(pdev, info); 506 fbi = info->par; 507 fbi->mach_info = mach_info; 508 509 err = fb_alloc_cmap(&info->cmap, 256, 0); 510 if (err) 511 goto failed_cmap; 512 513 err = ep93xxfb_alloc_videomem(info); 514 if (err) 515 goto failed_videomem; 516 517 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 518 if (!res) { 519 err = -ENXIO; 520 goto failed_resource; 521 } 522 523 /* 524 * FIXME - We don't do a request_mem_region here because we are 525 * sharing the register space with the backlight driver (see 526 * drivers/video/backlight/ep93xx_bl.c) and doing so will cause 527 * the second loaded driver to return -EBUSY. 528 * 529 * NOTE: No locking is required; the backlight does not touch 530 * any of the framebuffer registers. 531 */ 532 fbi->res = res; 533 fbi->mmio_base = devm_ioremap(&pdev->dev, res->start, 534 resource_size(res)); 535 if (!fbi->mmio_base) { 536 err = -ENXIO; 537 goto failed_resource; 538 } 539 540 strcpy(info->fix.id, pdev->name); 541 info->fbops = &ep93xxfb_ops; 542 info->fix.type = FB_TYPE_PACKED_PIXELS; 543 info->fix.accel = FB_ACCEL_NONE; 544 info->var.activate = FB_ACTIVATE_NOW; 545 info->var.vmode = FB_VMODE_NONINTERLACED; 546 info->flags = FBINFO_DEFAULT; 547 info->node = -1; 548 info->state = FBINFO_STATE_RUNNING; 549 info->pseudo_palette = &fbi->pseudo_palette; 550 551 fb_get_options("ep93xx-fb", &video_mode); 552 err = fb_find_mode(&info->var, info, video_mode, 553 fbi->mach_info->modes, fbi->mach_info->num_modes, 554 fbi->mach_info->default_mode, fbi->mach_info->bpp); 555 if (err == 0) { 556 dev_err(info->dev, "No suitable video mode found\n"); 557 err = -EINVAL; 558 goto failed_resource; 559 } 560 561 if (mach_info->setup) { 562 err = mach_info->setup(pdev); 563 if (err) 564 goto failed_resource; 565 } 566 567 err = ep93xxfb_check_var(&info->var, info); 568 if (err) 569 goto failed_check; 570 571 fbi->clk = devm_clk_get(&pdev->dev, NULL); 572 if (IS_ERR(fbi->clk)) { 573 err = PTR_ERR(fbi->clk); 574 fbi->clk = NULL; 575 goto failed_check; 576 } 577 578 ep93xxfb_set_par(info); 579 clk_enable(fbi->clk); 580 581 err = register_framebuffer(info); 582 if (err) 583 goto failed_check; 584 585 dev_info(info->dev, "registered. Mode = %dx%d-%d\n", 586 info->var.xres, info->var.yres, info->var.bits_per_pixel); 587 return 0; 588 589failed_check: 590 if (fbi->mach_info->teardown) 591 fbi->mach_info->teardown(pdev); 592failed_resource: 593 ep93xxfb_dealloc_videomem(info); 594failed_videomem: 595 fb_dealloc_cmap(&info->cmap); 596failed_cmap: 597 kfree(info); 598 599 return err; 600} 601 602static int ep93xxfb_remove(struct platform_device *pdev) 603{ 604 struct fb_info *info = platform_get_drvdata(pdev); 605 struct ep93xx_fbi *fbi = info->par; 606 607 unregister_framebuffer(info); 608 clk_disable(fbi->clk); 609 ep93xxfb_dealloc_videomem(info); 610 fb_dealloc_cmap(&info->cmap); 611 612 if (fbi->mach_info->teardown) 613 fbi->mach_info->teardown(pdev); 614 615 kfree(info); 616 617 return 0; 618} 619 620static struct platform_driver ep93xxfb_driver = { 621 .probe = ep93xxfb_probe, 622 .remove = ep93xxfb_remove, 623 .driver = { 624 .name = "ep93xx-fb", 625 }, 626}; 627module_platform_driver(ep93xxfb_driver); 628 629MODULE_DESCRIPTION("EP93XX Framebuffer Driver"); 630MODULE_ALIAS("platform:ep93xx-fb"); 631MODULE_AUTHOR("Ryan Mallon, " 632 "H Hartley Sweeten <hsweeten@visionengravers.com"); 633MODULE_LICENSE("GPL"); 634