1/* 2 * File: drivers/video/bf54x-lq043.c 3 * Based on: 4 * Author: Michael Hennerich <hennerich@blackfin.uclinux.org> 5 * 6 * Created: 7 * Description: ADSP-BF54x Framebuffer driver 8 * 9 * 10 * Modified: 11 * Copyright 2007-2008 Analog Devices Inc. 12 * 13 * Bugs: Enter bugs at http://blackfin.uclinux.org/ 14 * 15 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; either version 2 of the License, or 18 * (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with this program; if not, see the file COPYING, or write 27 * to the Free Software Foundation, Inc., 28 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 29 */ 30 31#include <linux/module.h> 32#include <linux/kernel.h> 33#include <linux/errno.h> 34#include <linux/string.h> 35#include <linux/mm.h> 36#include <linux/tty.h> 37#include <linux/slab.h> 38#include <linux/delay.h> 39#include <linux/fb.h> 40#include <linux/ioport.h> 41#include <linux/init.h> 42#include <linux/types.h> 43#include <linux/interrupt.h> 44#include <linux/sched.h> 45#include <linux/timer.h> 46#include <linux/device.h> 47#include <linux/backlight.h> 48#include <linux/lcd.h> 49#include <linux/spinlock.h> 50#include <linux/dma-mapping.h> 51#include <linux/platform_device.h> 52#include <linux/gpio.h> 53 54#include <asm/blackfin.h> 55#include <asm/irq.h> 56#include <asm/dpmc.h> 57#include <asm/dma-mapping.h> 58#include <asm/dma.h> 59#include <asm/portmux.h> 60 61#include <mach/bf54x-lq043.h> 62 63#define NO_BL_SUPPORT 64 65#define DRIVER_NAME "bf54x-lq043" 66static char driver_name[] = DRIVER_NAME; 67 68#define BFIN_LCD_NBR_PALETTE_ENTRIES 256 69 70#define EPPI0_18 {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, \ 71 P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, \ 72 P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, P_PPI0_D16, P_PPI0_D17, 0} 73 74#define EPPI0_24 {P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22, P_PPI0_D23, 0} 75 76struct bfin_bf54xfb_info { 77 struct fb_info *fb; 78 struct device *dev; 79 80 struct bfin_bf54xfb_mach_info *mach_info; 81 82 unsigned char *fb_buffer; /* RGB Buffer */ 83 84 dma_addr_t dma_handle; 85 int lq043_open_cnt; 86 int irq; 87 spinlock_t lock; /* lock */ 88}; 89 90static int nocursor; 91module_param(nocursor, int, 0644); 92MODULE_PARM_DESC(nocursor, "cursor enable/disable"); 93 94static int outp_rgb666; 95module_param(outp_rgb666, int, 0); 96MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666"); 97 98#define LCD_X_RES 480 /*Horizontal Resolution */ 99#define LCD_Y_RES 272 /* Vertical Resolution */ 100 101#define LCD_BPP 24 /* Bit Per Pixel */ 102#define DMA_BUS_SIZE 32 103 104/* -- Horizontal synchronizing -- 105 * 106 * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet 107 * (LCY-W-06602A Page 9 of 22) 108 * 109 * Clock Frequency 1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz 110 * 111 * Period TH - 525 - Clock 112 * Pulse width THp - 41 - Clock 113 * Horizontal period THd - 480 - Clock 114 * Back porch THb - 2 - Clock 115 * Front porch THf - 2 - Clock 116 * 117 * -- Vertical synchronizing -- 118 * Period TV - 286 - Line 119 * Pulse width TVp - 10 - Line 120 * Vertical period TVd - 272 - Line 121 * Back porch TVb - 2 - Line 122 * Front porch TVf - 2 - Line 123 */ 124 125#define LCD_CLK (8*1000*1000) /* 8MHz */ 126 127/* # active data to transfer after Horizontal Delay clock */ 128#define EPPI_HCOUNT LCD_X_RES 129 130/* # active lines to transfer after Vertical Delay clock */ 131#define EPPI_VCOUNT LCD_Y_RES 132 133/* Samples per Line = 480 (active data) + 45 (padding) */ 134#define EPPI_LINE 525 135 136/* Lines per Frame = 272 (active data) + 14 (padding) */ 137#define EPPI_FRAME 286 138 139/* FS1 (Hsync) Width (Typical)*/ 140#define EPPI_FS1W_HBL 41 141 142/* FS1 (Hsync) Period (Typical) */ 143#define EPPI_FS1P_AVPL EPPI_LINE 144 145/* Horizontal Delay clock after assertion of Hsync (Typical) */ 146#define EPPI_HDELAY 43 147 148/* FS2 (Vsync) Width = FS1 (Hsync) Period * 10 */ 149#define EPPI_FS2W_LVB (EPPI_LINE * 10) 150 151 /* FS2 (Vsync) Period = FS1 (Hsync) Period * Lines per Frame */ 152#define EPPI_FS2P_LAVF (EPPI_LINE * EPPI_FRAME) 153 154/* Vertical Delay after assertion of Vsync (2 Lines) */ 155#define EPPI_VDELAY 12 156 157#define EPPI_CLIP 0xFF00FF00 158 159/* EPPI Control register configuration value for RGB out 160 * - EPPI as Output 161 * GP 2 frame sync mode, 162 * Internal Clock generation disabled, Internal FS generation enabled, 163 * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge, 164 * FS1 & FS2 are active high, 165 * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out) 166 * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled 167 * Swapping Enabled, 168 * One (DMA) Channel Mode, 169 * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output 170 * Regular watermark - when FIFO is 100% full, 171 * Urgent watermark - when FIFO is 75% full 172 */ 173 174#define EPPI_CONTROL (0x20136E2E | SWAPEN) 175 176static inline u16 get_eppi_clkdiv(u32 target_ppi_clk) 177{ 178 u32 sclk = get_sclk(); 179 180 /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */ 181 182 return (((sclk / target_ppi_clk) / 2) - 1); 183} 184 185static void config_ppi(struct bfin_bf54xfb_info *fbi) 186{ 187 188 u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK); 189 190 bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL); 191 bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL); 192 bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB); 193 bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF); 194 bfin_write_EPPI0_CLIP(EPPI_CLIP); 195 196 bfin_write_EPPI0_FRAME(EPPI_FRAME); 197 bfin_write_EPPI0_LINE(EPPI_LINE); 198 199 bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT); 200 bfin_write_EPPI0_HDELAY(EPPI_HDELAY); 201 bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT); 202 bfin_write_EPPI0_VDELAY(EPPI_VDELAY); 203 204 bfin_write_EPPI0_CLKDIV(eppi_clkdiv); 205 206/* 207 * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out) 208 * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output 209 */ 210 if (outp_rgb666) 211 bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 | 212 RGB_FMT_EN); 213 else 214 bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) & 215 ~RGB_FMT_EN); 216 217 218} 219 220static int config_dma(struct bfin_bf54xfb_info *fbi) 221{ 222 223 set_dma_config(CH_EPPI0, 224 set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO, 225 INTR_DISABLE, DIMENSION_2D, 226 DATA_SIZE_32, 227 DMA_NOSYNC_KEEP_DMA_BUF)); 228 set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE); 229 set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8); 230 set_dma_y_count(CH_EPPI0, LCD_Y_RES); 231 set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8); 232 set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer); 233 234 return 0; 235} 236 237static int request_ports(struct bfin_bf54xfb_info *fbi) 238{ 239 240 u16 eppi_req_18[] = EPPI0_18; 241 u16 disp = fbi->mach_info->disp; 242 243 if (gpio_request_one(disp, GPIOF_OUT_INIT_HIGH, DRIVER_NAME)) { 244 printk(KERN_ERR "Requesting GPIO %d failed\n", disp); 245 return -EFAULT; 246 } 247 248 if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) { 249 printk(KERN_ERR "Requesting Peripherals failed\n"); 250 gpio_free(disp); 251 return -EFAULT; 252 } 253 254 if (!outp_rgb666) { 255 256 u16 eppi_req_24[] = EPPI0_24; 257 258 if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) { 259 printk(KERN_ERR "Requesting Peripherals failed\n"); 260 peripheral_free_list(eppi_req_18); 261 gpio_free(disp); 262 return -EFAULT; 263 } 264 } 265 266 return 0; 267} 268 269static void free_ports(struct bfin_bf54xfb_info *fbi) 270{ 271 272 u16 eppi_req_18[] = EPPI0_18; 273 274 gpio_free(fbi->mach_info->disp); 275 276 peripheral_free_list(eppi_req_18); 277 278 if (!outp_rgb666) { 279 u16 eppi_req_24[] = EPPI0_24; 280 peripheral_free_list(eppi_req_24); 281 } 282} 283 284static int bfin_bf54x_fb_open(struct fb_info *info, int user) 285{ 286 struct bfin_bf54xfb_info *fbi = info->par; 287 288 spin_lock(&fbi->lock); 289 fbi->lq043_open_cnt++; 290 291 if (fbi->lq043_open_cnt <= 1) { 292 293 bfin_write_EPPI0_CONTROL(0); 294 SSYNC(); 295 296 config_dma(fbi); 297 config_ppi(fbi); 298 299 /* start dma */ 300 enable_dma(CH_EPPI0); 301 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN); 302 } 303 304 spin_unlock(&fbi->lock); 305 306 return 0; 307} 308 309static int bfin_bf54x_fb_release(struct fb_info *info, int user) 310{ 311 struct bfin_bf54xfb_info *fbi = info->par; 312 313 spin_lock(&fbi->lock); 314 315 fbi->lq043_open_cnt--; 316 317 if (fbi->lq043_open_cnt <= 0) { 318 319 bfin_write_EPPI0_CONTROL(0); 320 SSYNC(); 321 disable_dma(CH_EPPI0); 322 } 323 324 spin_unlock(&fbi->lock); 325 326 return 0; 327} 328 329static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var, 330 struct fb_info *info) 331{ 332 333 switch (var->bits_per_pixel) { 334 case 24:/* TRUECOLOUR, 16m */ 335 var->red.offset = 16; 336 var->green.offset = 8; 337 var->blue.offset = 0; 338 var->red.length = var->green.length = var->blue.length = 8; 339 var->transp.offset = 0; 340 var->transp.length = 0; 341 var->transp.msb_right = 0; 342 var->red.msb_right = 0; 343 var->green.msb_right = 0; 344 var->blue.msb_right = 0; 345 break; 346 default: 347 pr_debug("%s: depth not supported: %u BPP\n", __func__, 348 var->bits_per_pixel); 349 return -EINVAL; 350 } 351 352 if (info->var.xres != var->xres || info->var.yres != var->yres || 353 info->var.xres_virtual != var->xres_virtual || 354 info->var.yres_virtual != var->yres_virtual) { 355 pr_debug("%s: Resolution not supported: X%u x Y%u \n", 356 __func__, var->xres, var->yres); 357 return -EINVAL; 358 } 359 360 /* 361 * Memory limit 362 */ 363 364 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) { 365 pr_debug("%s: Memory Limit requested yres_virtual = %u\n", 366 __func__, var->yres_virtual); 367 return -ENOMEM; 368 } 369 370 return 0; 371} 372 373int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor) 374{ 375 if (nocursor) 376 return 0; 377 else 378 return -EINVAL; /* just to force soft_cursor() call */ 379} 380 381static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green, 382 u_int blue, u_int transp, 383 struct fb_info *info) 384{ 385 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES) 386 return -EINVAL; 387 388 if (info->var.grayscale) { 389 /* grayscale = 0.30*R + 0.59*G + 0.11*B */ 390 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; 391 } 392 393 if (info->fix.visual == FB_VISUAL_TRUECOLOR) { 394 395 u32 value; 396 /* Place color in the pseudopalette */ 397 if (regno > 16) 398 return -EINVAL; 399 400 red >>= (16 - info->var.red.length); 401 green >>= (16 - info->var.green.length); 402 blue >>= (16 - info->var.blue.length); 403 404 value = (red << info->var.red.offset) | 405 (green << info->var.green.offset) | 406 (blue << info->var.blue.offset); 407 value &= 0xFFFFFF; 408 409 ((u32 *) (info->pseudo_palette))[regno] = value; 410 411 } 412 413 return 0; 414} 415 416static struct fb_ops bfin_bf54x_fb_ops = { 417 .owner = THIS_MODULE, 418 .fb_open = bfin_bf54x_fb_open, 419 .fb_release = bfin_bf54x_fb_release, 420 .fb_check_var = bfin_bf54x_fb_check_var, 421 .fb_fillrect = cfb_fillrect, 422 .fb_copyarea = cfb_copyarea, 423 .fb_imageblit = cfb_imageblit, 424 .fb_cursor = bfin_bf54x_fb_cursor, 425 .fb_setcolreg = bfin_bf54x_fb_setcolreg, 426}; 427 428#ifndef NO_BL_SUPPORT 429static int bl_get_brightness(struct backlight_device *bd) 430{ 431 return 0; 432} 433 434static const struct backlight_ops bfin_lq043fb_bl_ops = { 435 .get_brightness = bl_get_brightness, 436}; 437 438static struct backlight_device *bl_dev; 439 440static int bfin_lcd_get_power(struct lcd_device *dev) 441{ 442 return 0; 443} 444 445static int bfin_lcd_set_power(struct lcd_device *dev, int power) 446{ 447 return 0; 448} 449 450static int bfin_lcd_get_contrast(struct lcd_device *dev) 451{ 452 return 0; 453} 454 455static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast) 456{ 457 458 return 0; 459} 460 461static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi) 462{ 463 if (!fi || (fi == &bfin_bf54x_fb)) 464 return 1; 465 return 0; 466} 467 468static struct lcd_ops bfin_lcd_ops = { 469 .get_power = bfin_lcd_get_power, 470 .set_power = bfin_lcd_set_power, 471 .get_contrast = bfin_lcd_get_contrast, 472 .set_contrast = bfin_lcd_set_contrast, 473 .check_fb = bfin_lcd_check_fb, 474}; 475 476static struct lcd_device *lcd_dev; 477#endif 478 479static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id) 480{ 481 /*struct bfin_bf54xfb_info *info = dev_id;*/ 482 483 u16 status = bfin_read_EPPI0_STATUS(); 484 485 bfin_write_EPPI0_STATUS(0xFFFF); 486 487 if (status) { 488 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN); 489 disable_dma(CH_EPPI0); 490 491 /* start dma */ 492 enable_dma(CH_EPPI0); 493 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN); 494 bfin_write_EPPI0_STATUS(0xFFFF); 495 } 496 497 return IRQ_HANDLED; 498} 499 500static int bfin_bf54x_probe(struct platform_device *pdev) 501{ 502#ifndef NO_BL_SUPPORT 503 struct backlight_properties props; 504#endif 505 struct bfin_bf54xfb_info *info; 506 struct fb_info *fbinfo; 507 int ret; 508 509 printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n"); 510 511 if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) { 512 printk(KERN_ERR DRIVER_NAME 513 ": couldn't request CH_EPPI0 DMA\n"); 514 ret = -EFAULT; 515 goto out1; 516 } 517 518 fbinfo = 519 framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev); 520 if (!fbinfo) { 521 ret = -ENOMEM; 522 goto out2; 523 } 524 525 info = fbinfo->par; 526 info->fb = fbinfo; 527 info->dev = &pdev->dev; 528 spin_lock_init(&info->lock); 529 530 platform_set_drvdata(pdev, fbinfo); 531 532 strcpy(fbinfo->fix.id, driver_name); 533 534 info->mach_info = pdev->dev.platform_data; 535 536 if (info->mach_info == NULL) { 537 dev_err(&pdev->dev, 538 "no platform data for lcd, cannot attach\n"); 539 ret = -EINVAL; 540 goto out3; 541 } 542 543 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS; 544 fbinfo->fix.type_aux = 0; 545 fbinfo->fix.xpanstep = 0; 546 fbinfo->fix.ypanstep = 0; 547 fbinfo->fix.ywrapstep = 0; 548 fbinfo->fix.accel = FB_ACCEL_NONE; 549 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR; 550 551 fbinfo->var.nonstd = 0; 552 fbinfo->var.activate = FB_ACTIVATE_NOW; 553 fbinfo->var.height = info->mach_info->height; 554 fbinfo->var.width = info->mach_info->width; 555 fbinfo->var.accel_flags = 0; 556 fbinfo->var.vmode = FB_VMODE_NONINTERLACED; 557 558 fbinfo->fbops = &bfin_bf54x_fb_ops; 559 fbinfo->flags = FBINFO_FLAG_DEFAULT; 560 561 fbinfo->var.xres = info->mach_info->xres.defval; 562 fbinfo->var.xres_virtual = info->mach_info->xres.defval; 563 fbinfo->var.yres = info->mach_info->yres.defval; 564 fbinfo->var.yres_virtual = info->mach_info->yres.defval; 565 fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval; 566 567 fbinfo->var.upper_margin = 0; 568 fbinfo->var.lower_margin = 0; 569 fbinfo->var.vsync_len = 0; 570 571 fbinfo->var.left_margin = 0; 572 fbinfo->var.right_margin = 0; 573 fbinfo->var.hsync_len = 0; 574 575 fbinfo->var.red.offset = 16; 576 fbinfo->var.green.offset = 8; 577 fbinfo->var.blue.offset = 0; 578 fbinfo->var.transp.offset = 0; 579 fbinfo->var.red.length = 8; 580 fbinfo->var.green.length = 8; 581 fbinfo->var.blue.length = 8; 582 fbinfo->var.transp.length = 0; 583 fbinfo->fix.smem_len = info->mach_info->xres.max * 584 info->mach_info->yres.max * info->mach_info->bpp.max / 8; 585 586 fbinfo->fix.line_length = fbinfo->var.xres_virtual * 587 fbinfo->var.bits_per_pixel / 8; 588 589 info->fb_buffer = 590 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle, 591 GFP_KERNEL); 592 593 if (NULL == info->fb_buffer) { 594 printk(KERN_ERR DRIVER_NAME 595 ": couldn't allocate dma buffer.\n"); 596 ret = -ENOMEM; 597 goto out3; 598 } 599 600 fbinfo->screen_base = (void *)info->fb_buffer; 601 fbinfo->fix.smem_start = (int)info->fb_buffer; 602 603 fbinfo->fbops = &bfin_bf54x_fb_ops; 604 605 fbinfo->pseudo_palette = devm_kzalloc(&pdev->dev, sizeof(u32) * 16, 606 GFP_KERNEL); 607 if (!fbinfo->pseudo_palette) { 608 printk(KERN_ERR DRIVER_NAME 609 "Fail to allocate pseudo_palette\n"); 610 611 ret = -ENOMEM; 612 goto out4; 613 } 614 615 if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0) 616 < 0) { 617 printk(KERN_ERR DRIVER_NAME 618 "Fail to allocate colormap (%d entries)\n", 619 BFIN_LCD_NBR_PALETTE_ENTRIES); 620 ret = -EFAULT; 621 goto out4; 622 } 623 624 if (request_ports(info)) { 625 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n"); 626 ret = -EFAULT; 627 goto out6; 628 } 629 630 info->irq = platform_get_irq(pdev, 0); 631 if (info->irq < 0) { 632 ret = -EINVAL; 633 goto out7; 634 } 635 636 if (request_irq(info->irq, bfin_bf54x_irq_error, 0, 637 "PPI ERROR", info) < 0) { 638 printk(KERN_ERR DRIVER_NAME 639 ": unable to request PPI ERROR IRQ\n"); 640 ret = -EFAULT; 641 goto out7; 642 } 643 644 if (register_framebuffer(fbinfo) < 0) { 645 printk(KERN_ERR DRIVER_NAME 646 ": unable to register framebuffer.\n"); 647 ret = -EINVAL; 648 goto out8; 649 } 650#ifndef NO_BL_SUPPORT 651 memset(&props, 0, sizeof(struct backlight_properties)); 652 props.type = BACKLIGHT_RAW; 653 props.max_brightness = 255; 654 bl_dev = backlight_device_register("bf54x-bl", NULL, NULL, 655 &bfin_lq043fb_bl_ops, &props); 656 if (IS_ERR(bl_dev)) { 657 printk(KERN_ERR DRIVER_NAME 658 ": unable to register backlight.\n"); 659 ret = -EINVAL; 660 unregister_framebuffer(fbinfo); 661 goto out8; 662 } 663 664 lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops); 665 lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n"); 666#endif 667 668 return 0; 669 670out8: 671 free_irq(info->irq, info); 672out7: 673 free_ports(info); 674out6: 675 fb_dealloc_cmap(&fbinfo->cmap); 676out4: 677 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer, 678 info->dma_handle); 679out3: 680 framebuffer_release(fbinfo); 681out2: 682 free_dma(CH_EPPI0); 683out1: 684 685 return ret; 686} 687 688static int bfin_bf54x_remove(struct platform_device *pdev) 689{ 690 691 struct fb_info *fbinfo = platform_get_drvdata(pdev); 692 struct bfin_bf54xfb_info *info = fbinfo->par; 693 694 free_dma(CH_EPPI0); 695 free_irq(info->irq, info); 696 697 if (info->fb_buffer != NULL) 698 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer, 699 info->dma_handle); 700 701 fb_dealloc_cmap(&fbinfo->cmap); 702 703#ifndef NO_BL_SUPPORT 704 lcd_device_unregister(lcd_dev); 705 backlight_device_unregister(bl_dev); 706#endif 707 708 unregister_framebuffer(fbinfo); 709 710 free_ports(info); 711 712 printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n"); 713 714 return 0; 715} 716 717#ifdef CONFIG_PM 718static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state) 719{ 720 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN); 721 disable_dma(CH_EPPI0); 722 bfin_write_EPPI0_STATUS(0xFFFF); 723 724 return 0; 725} 726 727static int bfin_bf54x_resume(struct platform_device *pdev) 728{ 729 struct fb_info *fbinfo = platform_get_drvdata(pdev); 730 struct bfin_bf54xfb_info *info = fbinfo->par; 731 732 if (info->lq043_open_cnt) { 733 734 bfin_write_EPPI0_CONTROL(0); 735 SSYNC(); 736 737 config_dma(info); 738 config_ppi(info); 739 740 /* start dma */ 741 enable_dma(CH_EPPI0); 742 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN); 743 } 744 745 return 0; 746} 747#else 748#define bfin_bf54x_suspend NULL 749#define bfin_bf54x_resume NULL 750#endif 751 752static struct platform_driver bfin_bf54x_driver = { 753 .probe = bfin_bf54x_probe, 754 .remove = bfin_bf54x_remove, 755 .suspend = bfin_bf54x_suspend, 756 .resume = bfin_bf54x_resume, 757 .driver = { 758 .name = DRIVER_NAME, 759 .owner = THIS_MODULE, 760 }, 761}; 762module_platform_driver(bfin_bf54x_driver); 763 764MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver"); 765MODULE_LICENSE("GPL"); 766