linux/drivers/video/bf54x-lq043fb.c
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   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
  53#include <asm/blackfin.h>
  54#include <asm/irq.h>
  55#include <asm/dpmc.h>
  56#include <asm/dma-mapping.h>
  57#include <asm/dma.h>
  58#include <asm/gpio.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 __devinit 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
 529        platform_set_drvdata(pdev, fbinfo);
 530
 531        strcpy(fbinfo->fix.id, driver_name);
 532
 533        info->mach_info = pdev->dev.platform_data;
 534
 535        if (info->mach_info == NULL) {
 536                dev_err(&pdev->dev,
 537                        "no platform data for lcd, cannot attach\n");
 538                ret = -EINVAL;
 539                goto out3;
 540        }
 541
 542        fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 543        fbinfo->fix.type_aux = 0;
 544        fbinfo->fix.xpanstep = 0;
 545        fbinfo->fix.ypanstep = 0;
 546        fbinfo->fix.ywrapstep = 0;
 547        fbinfo->fix.accel = FB_ACCEL_NONE;
 548        fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 549
 550        fbinfo->var.nonstd = 0;
 551        fbinfo->var.activate = FB_ACTIVATE_NOW;
 552        fbinfo->var.height = info->mach_info->height;
 553        fbinfo->var.width = info->mach_info->width;
 554        fbinfo->var.accel_flags = 0;
 555        fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 556
 557        fbinfo->fbops = &bfin_bf54x_fb_ops;
 558        fbinfo->flags = FBINFO_FLAG_DEFAULT;
 559
 560        fbinfo->var.xres = info->mach_info->xres.defval;
 561        fbinfo->var.xres_virtual = info->mach_info->xres.defval;
 562        fbinfo->var.yres = info->mach_info->yres.defval;
 563        fbinfo->var.yres_virtual = info->mach_info->yres.defval;
 564        fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
 565
 566        fbinfo->var.upper_margin = 0;
 567        fbinfo->var.lower_margin = 0;
 568        fbinfo->var.vsync_len = 0;
 569
 570        fbinfo->var.left_margin = 0;
 571        fbinfo->var.right_margin = 0;
 572        fbinfo->var.hsync_len = 0;
 573
 574        fbinfo->var.red.offset = 16;
 575        fbinfo->var.green.offset = 8;
 576        fbinfo->var.blue.offset = 0;
 577        fbinfo->var.transp.offset = 0;
 578        fbinfo->var.red.length = 8;
 579        fbinfo->var.green.length = 8;
 580        fbinfo->var.blue.length = 8;
 581        fbinfo->var.transp.length = 0;
 582        fbinfo->fix.smem_len = info->mach_info->xres.max *
 583            info->mach_info->yres.max * info->mach_info->bpp.max / 8;
 584
 585        fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 586            fbinfo->var.bits_per_pixel / 8;
 587
 588        info->fb_buffer =
 589            dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 590                               GFP_KERNEL);
 591
 592        if (NULL == info->fb_buffer) {
 593                printk(KERN_ERR DRIVER_NAME
 594                       ": couldn't allocate dma buffer.\n");
 595                ret = -ENOMEM;
 596                goto out3;
 597        }
 598
 599        fbinfo->screen_base = (void *)info->fb_buffer;
 600        fbinfo->fix.smem_start = (int)info->fb_buffer;
 601
 602        fbinfo->fbops = &bfin_bf54x_fb_ops;
 603
 604        fbinfo->pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
 605        if (!fbinfo->pseudo_palette) {
 606                printk(KERN_ERR DRIVER_NAME
 607                       "Fail to allocate pseudo_palette\n");
 608
 609                ret = -ENOMEM;
 610                goto out4;
 611        }
 612
 613        if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 614            < 0) {
 615                printk(KERN_ERR DRIVER_NAME
 616                       "Fail to allocate colormap (%d entries)\n",
 617                       BFIN_LCD_NBR_PALETTE_ENTRIES);
 618                ret = -EFAULT;
 619                goto out5;
 620        }
 621
 622        if (request_ports(info)) {
 623                printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 624                ret = -EFAULT;
 625                goto out6;
 626        }
 627
 628        info->irq = platform_get_irq(pdev, 0);
 629        if (info->irq < 0) {
 630                ret = -EINVAL;
 631                goto out7;
 632        }
 633
 634        if (request_irq(info->irq, bfin_bf54x_irq_error, 0,
 635                        "PPI ERROR", info) < 0) {
 636                printk(KERN_ERR DRIVER_NAME
 637                       ": unable to request PPI ERROR IRQ\n");
 638                ret = -EFAULT;
 639                goto out7;
 640        }
 641
 642        if (register_framebuffer(fbinfo) < 0) {
 643                printk(KERN_ERR DRIVER_NAME
 644                       ": unable to register framebuffer.\n");
 645                ret = -EINVAL;
 646                goto out8;
 647        }
 648#ifndef NO_BL_SUPPORT
 649        memset(&props, 0, sizeof(struct backlight_properties));
 650        props.type = BACKLIGHT_RAW;
 651        props.max_brightness = 255;
 652        bl_dev = backlight_device_register("bf54x-bl", NULL, NULL,
 653                                           &bfin_lq043fb_bl_ops, &props);
 654        if (IS_ERR(bl_dev)) {
 655                printk(KERN_ERR DRIVER_NAME
 656                        ": unable to register backlight.\n");
 657                ret = -EINVAL;
 658                unregister_framebuffer(fbinfo);
 659                goto out8;
 660        }
 661
 662        lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
 663        lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 664#endif
 665
 666        return 0;
 667
 668out8:
 669        free_irq(info->irq, info);
 670out7:
 671        free_ports(info);
 672out6:
 673        fb_dealloc_cmap(&fbinfo->cmap);
 674out5:
 675        kfree(fbinfo->pseudo_palette);
 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        platform_set_drvdata(pdev, NULL);
 685
 686        return ret;
 687}
 688
 689static int __devexit bfin_bf54x_remove(struct platform_device *pdev)
 690{
 691
 692        struct fb_info *fbinfo = platform_get_drvdata(pdev);
 693        struct bfin_bf54xfb_info *info = fbinfo->par;
 694
 695        free_dma(CH_EPPI0);
 696        free_irq(info->irq, info);
 697
 698        if (info->fb_buffer != NULL)
 699                dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 700                                  info->dma_handle);
 701
 702        kfree(fbinfo->pseudo_palette);
 703        fb_dealloc_cmap(&fbinfo->cmap);
 704
 705#ifndef NO_BL_SUPPORT
 706        lcd_device_unregister(lcd_dev);
 707        backlight_device_unregister(bl_dev);
 708#endif
 709
 710        unregister_framebuffer(fbinfo);
 711
 712        free_ports(info);
 713
 714        printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 715
 716        return 0;
 717}
 718
 719#ifdef CONFIG_PM
 720static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
 721{
 722        struct fb_info *fbinfo = platform_get_drvdata(pdev);
 723
 724        bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 725        disable_dma(CH_EPPI0);
 726        bfin_write_EPPI0_STATUS(0xFFFF);
 727
 728        return 0;
 729}
 730
 731static int bfin_bf54x_resume(struct platform_device *pdev)
 732{
 733        struct fb_info *fbinfo = platform_get_drvdata(pdev);
 734        struct bfin_bf54xfb_info *info = fbinfo->par;
 735
 736        if (info->lq043_open_cnt) {
 737
 738                bfin_write_EPPI0_CONTROL(0);
 739                SSYNC();
 740
 741                config_dma(info);
 742                config_ppi(info);
 743
 744                /* start dma */
 745                enable_dma(CH_EPPI0);
 746                bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 747        }
 748
 749        return 0;
 750}
 751#else
 752#define bfin_bf54x_suspend      NULL
 753#define bfin_bf54x_resume       NULL
 754#endif
 755
 756static struct platform_driver bfin_bf54x_driver = {
 757        .probe = bfin_bf54x_probe,
 758        .remove = __devexit_p(bfin_bf54x_remove),
 759        .suspend = bfin_bf54x_suspend,
 760        .resume = bfin_bf54x_resume,
 761        .driver = {
 762                   .name = DRIVER_NAME,
 763                   .owner = THIS_MODULE,
 764                   },
 765};
 766
 767static int __init bfin_bf54x_driver_init(void)
 768{
 769        return platform_driver_register(&bfin_bf54x_driver);
 770}
 771
 772static void __exit bfin_bf54x_driver_cleanup(void)
 773{
 774        platform_driver_unregister(&bfin_bf54x_driver);
 775}
 776
 777MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
 778MODULE_LICENSE("GPL");
 779
 780module_init(bfin_bf54x_driver_init);
 781module_exit(bfin_bf54x_driver_cleanup);
 782
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