git.oblomov.eu Git - linux-2.6/blob - drivers/video/pxa168fb.c

   1 /*
   2  * linux/drivers/video/pxa168fb.c -- Marvell PXA168 LCD Controller
   3  *
   4  *  Copyright (C) 2008 Marvell International Ltd.
   5  *  All rights reserved.
   6  *
   7  *  2009-02-16  adapted from original version for PXA168/910
   8  *              Jun Nie <njun@marvell.com>
   9  *
  10  * This file is subject to the terms and conditions of the GNU General Public
  11  * License. See the file COPYING in the main directory of this archive for
  12  * more details.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/sched.h>
  18 #include <linux/string.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/slab.h>
  21 #include <linux/fb.h>
  22 #include <linux/delay.h>
  23 #include <linux/init.h>
  24 #include <linux/ioport.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/dma-mapping.h>
  27 #include <linux/clk.h>
  28 #include <linux/err.h>
  29 #include <linux/uaccess.h>
  30 #include <video/pxa168fb.h>
  31
  32 #include "pxa168fb.h"
  33
  34 #define DEFAULT_REFRESH         60      /* Hz */
  35
  36 static int determine_best_pix_fmt(struct fb_var_screeninfo *var)
  37 {
  38         /*
  39          * Pseudocolor mode?
  40          */
  41         if (var->bits_per_pixel == 8)
  42                 return PIX_FMT_PSEUDOCOLOR;
  43
  44         /*
  45          * Check for 565/1555.
  46          */
  47         if (var->bits_per_pixel == 16 && var->red.length <= 5 &&
  48             var->green.length <= 6 && var->blue.length <= 5) {
  49                 if (var->transp.length == 0) {
  50                         if (var->red.offset >= var->blue.offset)
  51                                 return PIX_FMT_RGB565;
  52                         else
  53                                 return PIX_FMT_BGR565;
  54                 }
  55
  56                 if (var->transp.length == 1 && var->green.length <= 5) {
  57                         if (var->red.offset >= var->blue.offset)
  58                                 return PIX_FMT_RGB1555;
  59                         else
  60                                 return PIX_FMT_BGR1555;
  61                 }
  62
  63                 /* fall through */
  64         }
  65
  66         /*
  67          * Check for 888/A888.
  68          */
  69         if (var->bits_per_pixel <= 32 && var->red.length <= 8 &&
  70             var->green.length <= 8 && var->blue.length <= 8) {
  71                 if (var->bits_per_pixel == 24 && var->transp.length == 0) {
  72                         if (var->red.offset >= var->blue.offset)
  73                                 return PIX_FMT_RGB888PACK;
  74                         else
  75                                 return PIX_FMT_BGR888PACK;
  76                 }
  77
  78                 if (var->bits_per_pixel == 32 && var->transp.length == 8) {
  79                         if (var->red.offset >= var->blue.offset)
  80                                 return PIX_FMT_RGBA888;
  81                         else
  82                                 return PIX_FMT_BGRA888;
  83                 } else {
  84                         if (var->red.offset >= var->blue.offset)
  85                                 return PIX_FMT_RGB888UNPACK;
  86                         else
  87                                 return PIX_FMT_BGR888UNPACK;
  88                 }
  89
  90                 /* fall through */
  91         }
  92
  93         return -EINVAL;
  94 }
  95
  96 static void set_pix_fmt(struct fb_var_screeninfo *var, int pix_fmt)
  97 {
  98         switch (pix_fmt) {
  99         case PIX_FMT_RGB565:
 100                 var->bits_per_pixel = 16;
 101                 var->red.offset = 11;    var->red.length = 5;
 102                 var->green.offset = 5;   var->green.length = 6;
 103                 var->blue.offset = 0;    var->blue.length = 5;
 104                 var->transp.offset = 0;  var->transp.length = 0;
 105                 break;
 106         case PIX_FMT_BGR565:
 107                 var->bits_per_pixel = 16;
 108                 var->red.offset = 0;     var->red.length = 5;
 109                 var->green.offset = 5;   var->green.length = 6;
 110                 var->blue.offset = 11;   var->blue.length = 5;
 111                 var->transp.offset = 0;  var->transp.length = 0;
 112                 break;
 113         case PIX_FMT_RGB1555:
 114                 var->bits_per_pixel = 16;
 115                 var->red.offset = 10;    var->red.length = 5;
 116                 var->green.offset = 5;   var->green.length = 5;
 117                 var->blue.offset = 0;    var->blue.length = 5;
 118                 var->transp.offset = 15; var->transp.length = 1;
 119                 break;
 120         case PIX_FMT_BGR1555:
 121                 var->bits_per_pixel = 16;
 122                 var->red.offset = 0;     var->red.length = 5;
 123                 var->green.offset = 5;   var->green.length = 5;
 124                 var->blue.offset = 10;   var->blue.length = 5;
 125                 var->transp.offset = 15; var->transp.length = 1;
 126                 break;
 127         case PIX_FMT_RGB888PACK:
 128                 var->bits_per_pixel = 24;
 129                 var->red.offset = 16;    var->red.length = 8;
 130                 var->green.offset = 8;   var->green.length = 8;
 131                 var->blue.offset = 0;    var->blue.length = 8;
 132                 var->transp.offset = 0;  var->transp.length = 0;
 133                 break;
 134         case PIX_FMT_BGR888PACK:
 135                 var->bits_per_pixel = 24;
 136                 var->red.offset = 0;     var->red.length = 8;
 137                 var->green.offset = 8;   var->green.length = 8;
 138                 var->blue.offset = 16;   var->blue.length = 8;
 139                 var->transp.offset = 0;  var->transp.length = 0;
 140                 break;
 141         case PIX_FMT_RGBA888:
 142                 var->bits_per_pixel = 32;
 143                 var->red.offset = 16;    var->red.length = 8;
 144                 var->green.offset = 8;   var->green.length = 8;
 145                 var->blue.offset = 0;    var->blue.length = 8;
 146                 var->transp.offset = 24; var->transp.length = 8;
 147                 break;
 148         case PIX_FMT_BGRA888:
 149                 var->bits_per_pixel = 32;
 150                 var->red.offset = 0;     var->red.length = 8;
 151                 var->green.offset = 8;   var->green.length = 8;
 152                 var->blue.offset = 16;   var->blue.length = 8;
 153                 var->transp.offset = 24; var->transp.length = 8;
 154                 break;
 155         case PIX_FMT_PSEUDOCOLOR:
 156                 var->bits_per_pixel = 8;
 157                 var->red.offset = 0;     var->red.length = 8;
 158                 var->green.offset = 0;   var->green.length = 8;
 159                 var->blue.offset = 0;    var->blue.length = 8;
 160                 var->transp.offset = 0;  var->transp.length = 0;
 161                 break;
 162         }
 163 }
 164
 165 static void set_mode(struct pxa168fb_info *fbi, struct fb_var_screeninfo *var,
 166                      struct fb_videomode *mode, int pix_fmt, int ystretch)
 167 {
 168         struct fb_info *info = fbi->info;
 169
 170         set_pix_fmt(var, pix_fmt);
 171
 172         var->xres = mode->xres;
 173         var->yres = mode->yres;
 174         var->xres_virtual = max(var->xres, var->xres_virtual);
 175         if (ystretch)
 176                 var->yres_virtual = info->fix.smem_len /
 177                         (var->xres_virtual * (var->bits_per_pixel >> 3));
 178         else
 179                 var->yres_virtual = max(var->yres, var->yres_virtual);
 180         var->grayscale = 0;
 181         var->accel_flags = FB_ACCEL_NONE;
 182         var->pixclock = mode->pixclock;
 183         var->left_margin = mode->left_margin;
 184         var->right_margin = mode->right_margin;
 185         var->upper_margin = mode->upper_margin;
 186         var->lower_margin = mode->lower_margin;
 187         var->hsync_len = mode->hsync_len;
 188         var->vsync_len = mode->vsync_len;
 189         var->sync = mode->sync;
 190         var->vmode = FB_VMODE_NONINTERLACED;
 191         var->rotate = FB_ROTATE_UR;
 192 }
 193
 194 static int pxa168fb_check_var(struct fb_var_screeninfo *var,
 195                               struct fb_info *info)
 196 {
 197         struct pxa168fb_info *fbi = info->par;
 198         int pix_fmt;
 199
 200         /*
 201          * Determine which pixel format we're going to use.
 202          */
 203         pix_fmt = determine_best_pix_fmt(var);
 204         if (pix_fmt < 0)
 205                 return pix_fmt;
 206         set_pix_fmt(var, pix_fmt);
 207         fbi->pix_fmt = pix_fmt;
 208
 209         /*
 210          * Basic geometry sanity checks.
 211          */
 212         if (var->xoffset + var->xres > var->xres_virtual)
 213                 return -EINVAL;
 214         if (var->yoffset + var->yres > var->yres_virtual)
 215                 return -EINVAL;
 216         if (var->xres + var->right_margin +
 217             var->hsync_len + var->left_margin > 2048)
 218                 return -EINVAL;
 219         if (var->yres + var->lower_margin +
 220             var->vsync_len + var->upper_margin > 2048)
 221                 return -EINVAL;
 222
 223         /*
 224          * Check size of framebuffer.
 225          */
 226         if (var->xres_virtual * var->yres_virtual *
 227             (var->bits_per_pixel >> 3) > info->fix.smem_len)
 228                 return -EINVAL;
 229
 230         return 0;
 231 }
 232
 233 /*
 234  * The hardware clock divider has an integer and a fractional
 235  * stage:
 236  *
 237  *      clk2 = clk_in / integer_divider
 238  *      clk_out = clk2 * (1 - (fractional_divider >> 12))
 239  *
 240  * Calculate integer and fractional divider for given clk_in
 241  * and clk_out.
 242  */
 243 static void set_clock_divider(struct pxa168fb_info *fbi,
 244                               const struct fb_videomode *m)
 245 {
 246         int divider_int;
 247         int needed_pixclk;
 248         u64 div_result;
 249         u32 x = 0;
 250
 251         /*
 252          * Notice: The field pixclock is used by linux fb
 253          * is in pixel second. E.g. struct fb_videomode &
 254          * struct fb_var_screeninfo
 255          */
 256
 257         /*
 258          * Check input values.
 259          */
 260         if (!m || !m->pixclock || !m->refresh) {
 261                 dev_err(fbi->dev, "Input refresh or pixclock is wrong.\n");
 262                 return;
 263         }
 264
 265         /*
 266          * Using PLL/AXI clock.
 267          */
 268         x = 0x80000000;
 269
 270         /*
 271          * Calc divider according to refresh rate.
 272          */
 273         div_result = 1000000000000ll;
 274         do_div(div_result, m->pixclock);
 275         needed_pixclk = (u32)div_result;
 276
 277         divider_int = clk_get_rate(fbi->clk) / needed_pixclk;
 278
 279         /* check whether divisor is too small. */
 280         if (divider_int < 2) {
 281                 dev_warn(fbi->dev, "Warning: clock source is too slow."
 282                                 "Try smaller resolution\n");
 283                 divider_int = 2;
 284         }
 285
 286         /*
 287          * Set setting to reg.
 288          */
 289         x |= divider_int;
 290         writel(x, fbi->reg_base + LCD_CFG_SCLK_DIV);
 291 }
 292
 293 static void set_dma_control0(struct pxa168fb_info *fbi)
 294 {
 295         u32 x;
 296
 297         /*
 298          * Set bit to enable graphics DMA.
 299          */
 300         x = readl(fbi->reg_base + LCD_SPU_DMA_CTRL0);
 301         x |= fbi->active ? 0x00000100 : 0;
 302         fbi->active = 0;
 303
 304         /*
 305          * If we are in a pseudo-color mode, we need to enable
 306          * palette lookup.
 307          */
 308         if (fbi->pix_fmt == PIX_FMT_PSEUDOCOLOR)
 309                 x |= 0x10000000;
 310
 311         /*
 312          * Configure hardware pixel format.
 313          */
 314         x &= ~(0xF << 16);
 315         x |= (fbi->pix_fmt >> 1) << 16;
 316
 317         /*
 318          * Check red and blue pixel swap.
 319          * 1. source data swap
 320          * 2. panel output data swap
 321          */
 322         x &= ~(1 << 12);
 323         x |= ((fbi->pix_fmt & 1) ^ (fbi->panel_rbswap)) << 12;
 324
 325         writel(x, fbi->reg_base + LCD_SPU_DMA_CTRL0);
 326 }
 327
 328 static void set_dma_control1(struct pxa168fb_info *fbi, int sync)
 329 {
 330         u32 x;
 331
 332         /*
 333          * Configure default bits: vsync triggers DMA, gated clock
 334          * enable, power save enable, configure alpha registers to
 335          * display 100% graphics, and set pixel command.
 336          */
 337         x = readl(fbi->reg_base + LCD_SPU_DMA_CTRL1);
 338         x |= 0x2032ff81;
 339
 340         /*
 341          * We trigger DMA on the falling edge of vsync if vsync is
 342          * active low, or on the rising edge if vsync is active high.
 343          */
 344         if (!(sync & FB_SYNC_VERT_HIGH_ACT))
 345                 x |= 0x08000000;
 346
 347         writel(x, fbi->reg_base + LCD_SPU_DMA_CTRL1);
 348 }
 349
 350 static void set_graphics_start(struct fb_info *info, int xoffset, int yoffset)
 351 {
 352         struct pxa168fb_info *fbi = info->par;
 353         struct fb_var_screeninfo *var = &info->var;
 354         int pixel_offset;
 355         unsigned long addr;
 356
 357         pixel_offset = (yoffset * var->xres_virtual) + xoffset;
 358
 359         addr = fbi->fb_start_dma + (pixel_offset * (var->bits_per_pixel >> 3));
 360         writel(addr, fbi->reg_base + LCD_CFG_GRA_START_ADDR0);
 361 }
 362
 363 static void set_dumb_panel_control(struct fb_info *info)
 364 {
 365         struct pxa168fb_info *fbi = info->par;
 366         struct pxa168fb_mach_info *mi = fbi->dev->platform_data;
 367         u32 x;
 368
 369         /*
 370          * Preserve enable flag.
 371          */
 372         x = readl(fbi->reg_base + LCD_SPU_DUMB_CTRL) & 0x00000001;
 373
 374         x |= (fbi->is_blanked ? 0x7 : mi->dumb_mode) << 28;
 375         x |= mi->gpio_output_data << 20;
 376         x |= mi->gpio_output_mask << 12;
 377         x |= mi->panel_rgb_reverse_lanes ? 0x00000080 : 0;
 378         x |= mi->invert_composite_blank ? 0x00000040 : 0;
 379         x |= (info->var.sync & FB_SYNC_COMP_HIGH_ACT) ? 0x00000020 : 0;
 380         x |= mi->invert_pix_val_ena ? 0x00000010 : 0;
 381         x |= (info->var.sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 0x00000008;
 382         x |= (info->var.sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 0x00000004;
 383         x |= mi->invert_pixclock ? 0x00000002 : 0;
 384
 385         writel(x, fbi->reg_base + LCD_SPU_DUMB_CTRL);
 386 }
 387
 388 static void set_dumb_screen_dimensions(struct fb_info *info)
 389 {
 390         struct pxa168fb_info *fbi = info->par;
 391         struct fb_var_screeninfo *v = &info->var;
 392         int x;
 393         int y;
 394
 395         x = v->xres + v->right_margin + v->hsync_len + v->left_margin;
 396         y = v->yres + v->lower_margin + v->vsync_len + v->upper_margin;
 397
 398         writel((y << 16) | x, fbi->reg_base + LCD_SPUT_V_H_TOTAL);
 399 }
 400
 401 static int pxa168fb_set_par(struct fb_info *info)
 402 {
 403         struct pxa168fb_info *fbi = info->par;
 404         struct fb_var_screeninfo *var = &info->var;
 405         struct fb_videomode mode;
 406         u32 x;
 407         struct pxa168fb_mach_info *mi;
 408
 409         mi = fbi->dev->platform_data;
 410
 411         /*
 412          * Set additional mode info.
 413          */
 414         if (fbi->pix_fmt == PIX_FMT_PSEUDOCOLOR)
 415                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 416         else
 417                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 418         info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
 419         info->fix.ypanstep = var->yres;
 420
 421         /*
 422          * Disable panel output while we setup the display.
 423          */
 424         x = readl(fbi->reg_base + LCD_SPU_DUMB_CTRL);
 425         writel(x & ~1, fbi->reg_base + LCD_SPU_DUMB_CTRL);
 426
 427         /*
 428          * Configure global panel parameters.
 429          */
 430         writel((var->yres << 16) | var->xres,
 431                 fbi->reg_base + LCD_SPU_V_H_ACTIVE);
 432
 433         /*
 434          * convet var to video mode
 435          */
 436         fb_var_to_videomode(&mode, &info->var);
 437
 438         /* Calculate clock divisor. */
 439         set_clock_divider(fbi, &mode);
 440
 441         /* Configure dma ctrl regs. */
 442         set_dma_control0(fbi);
 443         set_dma_control1(fbi, info->var.sync);
 444
 445         /*
 446          * Configure graphics DMA parameters.
 447          */
 448         x = readl(fbi->reg_base + LCD_CFG_GRA_PITCH);
 449         x = (x & ~0xFFFF) | ((var->xres_virtual * var->bits_per_pixel) >> 3);
 450         writel(x, fbi->reg_base + LCD_CFG_GRA_PITCH);
 451         writel((var->yres << 16) | var->xres,
 452                 fbi->reg_base + LCD_SPU_GRA_HPXL_VLN);
 453         writel((var->yres << 16) | var->xres,
 454                 fbi->reg_base + LCD_SPU_GZM_HPXL_VLN);
 455
 456         /*
 457          * Configure dumb panel ctrl regs & timings.
 458          */
 459         set_dumb_panel_control(info);
 460         set_dumb_screen_dimensions(info);
 461
 462         writel((var->left_margin << 16) | var->right_margin,
 463                         fbi->reg_base + LCD_SPU_H_PORCH);
 464         writel((var->upper_margin << 16) | var->lower_margin,
 465                         fbi->reg_base + LCD_SPU_V_PORCH);
 466
 467         /*
 468          * Re-enable panel output.
 469          */
 470         x = readl(fbi->reg_base + LCD_SPU_DUMB_CTRL);
 471         writel(x | 1, fbi->reg_base + LCD_SPU_DUMB_CTRL);
 472
 473         return 0;
 474 }
 475
 476 static unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
 477 {
 478         return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset;
 479 }
 480
 481 static u32 to_rgb(u16 red, u16 green, u16 blue)
 482 {
 483         red >>= 8;
 484         green >>= 8;
 485         blue >>= 8;
 486
 487         return (red << 16) | (green << 8) | blue;
 488 }
 489
 490 static int
 491 pxa168fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
 492                  unsigned int blue, unsigned int trans, struct fb_info *info)
 493 {
 494         struct pxa168fb_info *fbi = info->par;
 495         u32 val;
 496
 497         if (info->var.grayscale)
 498                 red = green = blue = (19595 * red + 38470 * green +
 499                                         7471 * blue) >> 16;
 500
 501         if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) {
 502                 val =  chan_to_field(red,   &info->var.red);
 503                 val |= chan_to_field(green, &info->var.green);
 504                 val |= chan_to_field(blue , &info->var.blue);
 505                 fbi->pseudo_palette[regno] = val;
 506         }
 507
 508         if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) {
 509                 val = to_rgb(red, green, blue);
 510                 writel(val, fbi->reg_base + LCD_SPU_SRAM_WRDAT);
 511                 writel(0x8300 | regno, fbi->reg_base + LCD_SPU_SRAM_CTRL);
 512         }
 513
 514         return 0;
 515 }
 516
 517 static int pxa168fb_blank(int blank, struct fb_info *info)
 518 {
 519         struct pxa168fb_info *fbi = info->par;
 520
 521         fbi->is_blanked = (blank == FB_BLANK_UNBLANK) ? 0 : 1;
 522         set_dumb_panel_control(info);
 523
 524         return 0;
 525 }
 526
 527 static int pxa168fb_pan_display(struct fb_var_screeninfo *var,
 528                                 struct fb_info *info)
 529 {
 530         set_graphics_start(info, var->xoffset, var->yoffset);
 531
 532         return 0;
 533 }
 534
 535 static irqreturn_t pxa168fb_handle_irq(int irq, void *dev_id)
 536 {
 537         struct pxa168fb_info *fbi = dev_id;
 538         u32 isr = readl(fbi->reg_base + SPU_IRQ_ISR);
 539
 540         if ((isr & GRA_FRAME_IRQ0_ENA_MASK)) {
 541
 542                 writel(isr & (~GRA_FRAME_IRQ0_ENA_MASK),
 543                         fbi->reg_base + SPU_IRQ_ISR);
 544
 545                 return IRQ_HANDLED;
 546         }
 547         return IRQ_NONE;
 548 }
 549
 550 static struct fb_ops pxa168fb_ops = {
 551         .owner          = THIS_MODULE,
 552         .fb_check_var   = pxa168fb_check_var,
 553         .fb_set_par     = pxa168fb_set_par,
 554         .fb_setcolreg   = pxa168fb_setcolreg,
 555         .fb_blank       = pxa168fb_blank,
 556         .fb_pan_display = pxa168fb_pan_display,
 557         .fb_fillrect    = cfb_fillrect,
 558         .fb_copyarea    = cfb_copyarea,
 559         .fb_imageblit   = cfb_imageblit,
 560 };
 561
 562 static int __init pxa168fb_init_mode(struct fb_info *info,
 563                               struct pxa168fb_mach_info *mi)
 564 {
 565         struct pxa168fb_info *fbi = info->par;
 566         struct fb_var_screeninfo *var = &info->var;
 567         int ret = 0;
 568         u32 total_w, total_h, refresh;
 569         u64 div_result;
 570         const struct fb_videomode *m;
 571
 572         /*
 573          * Set default value
 574          */
 575         refresh = DEFAULT_REFRESH;
 576
 577         /* try to find best video mode. */
 578         m = fb_find_best_mode(&info->var, &info->modelist);
 579         if (m)
 580                 fb_videomode_to_var(&info->var, m);
 581
 582         /* Init settings. */
 583         var->xres_virtual = var->xres;
 584         var->yres_virtual = info->fix.smem_len /
 585                 (var->xres_virtual * (var->bits_per_pixel >> 3));
 586         dev_dbg(fbi->dev, "pxa168fb: find best mode: res = %dx%d\n",
 587                                 var->xres, var->yres);
 588
 589         /* correct pixclock. */
 590         total_w = var->xres + var->left_margin + var->right_margin +
 591                   var->hsync_len;
 592         total_h = var->yres + var->upper_margin + var->lower_margin +
 593                   var->vsync_len;
 594
 595         div_result = 1000000000000ll;
 596         do_div(div_result, total_w * total_h * refresh);
 597         var->pixclock = (u32)div_result;
 598
 599         return ret;
 600 }
 601
 602 static int __init pxa168fb_probe(struct platform_device *pdev)
 603 {
 604         struct pxa168fb_mach_info *mi;
 605         struct fb_info *info = 0;
 606         struct pxa168fb_info *fbi = 0;
 607         struct resource *res;
 608         struct clk *clk;
 609         int irq, ret;
 610
 611         mi = pdev->dev.platform_data;
 612         if (mi == NULL) {
 613                 dev_err(&pdev->dev, "no platform data defined\n");
 614                 return -EINVAL;
 615         }
 616
 617         clk = clk_get(&pdev->dev, "LCDCLK");
 618         if (IS_ERR(clk)) {
 619                 dev_err(&pdev->dev, "unable to get LCDCLK");
 620                 return PTR_ERR(clk);
 621         }
 622
 623         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 624         if (res == NULL) {
 625                 dev_err(&pdev->dev, "no IO memory defined\n");
 626                 return -ENOENT;
 627         }
 628
 629         irq = platform_get_irq(pdev, 0);
 630         if (irq < 0) {
 631                 dev_err(&pdev->dev, "no IRQ defined\n");
 632                 return -ENOENT;
 633         }
 634
 635         info = framebuffer_alloc(sizeof(struct pxa168fb_info), &pdev->dev);
 636         if (info == NULL) {
 637                 clk_put(clk);
 638                 return -ENOMEM;
 639         }
 640
 641         /* Initialize private data */
 642         fbi = info->par;
 643         fbi->info = info;
 644         fbi->clk = clk;
 645         fbi->dev = info->dev = &pdev->dev;
 646         fbi->panel_rbswap = mi->panel_rbswap;
 647         fbi->is_blanked = 0;
 648         fbi->active = mi->active;
 649
 650         /*
 651          * Initialise static fb parameters.
 652          */
 653         info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK |
 654                       FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
 655         info->node = -1;
 656         strlcpy(info->fix.id, mi->id, 16);
 657         info->fix.type = FB_TYPE_PACKED_PIXELS;
 658         info->fix.type_aux = 0;
 659         info->fix.xpanstep = 0;
 660         info->fix.ypanstep = 0;
 661         info->fix.ywrapstep = 0;
 662         info->fix.mmio_start = res->start;
 663         info->fix.mmio_len = res->end - res->start + 1;
 664         info->fix.accel = FB_ACCEL_NONE;
 665         info->fbops = &pxa168fb_ops;
 666         info->pseudo_palette = fbi->pseudo_palette;
 667
 668         /*
 669          * Map LCD controller registers.
 670          */
 671         fbi->reg_base = ioremap_nocache(res->start, res->end - res->start);
 672         if (fbi->reg_base == NULL) {
 673                 ret = -ENOMEM;
 674                 goto failed;
 675         }
 676
 677         /*
 678          * Allocate framebuffer memory.
 679          */
 680         info->fix.smem_len = PAGE_ALIGN(DEFAULT_FB_SIZE);
 681
 682         info->screen_base = dma_alloc_writecombine(fbi->dev, info->fix.smem_len,
 683                                                 &fbi->fb_start_dma, GFP_KERNEL);
 684         if (info->screen_base == NULL) {
 685                 ret = -ENOMEM;
 686                 goto failed;
 687         }
 688
 689         info->fix.smem_start = (unsigned long)fbi->fb_start_dma;
 690
 691         /*
 692          * Set video mode according to platform data.
 693          */
 694         set_mode(fbi, &info->var, mi->modes, mi->pix_fmt, 1);
 695
 696         fb_videomode_to_modelist(mi->modes, mi->num_modes, &info->modelist);
 697
 698         /*
 699          * init video mode data.
 700          */
 701         pxa168fb_init_mode(info, mi);
 702
 703         ret = pxa168fb_check_var(&info->var, info);
 704         if (ret)
 705                 goto failed_free_fbmem;
 706
 707         /*
 708          * Fill in sane defaults.
 709          */
 710         ret = pxa168fb_check_var(&info->var, info);
 711         if (ret)
 712                 goto failed;
 713
 714         /*
 715          * enable controller clock
 716          */
 717         clk_enable(fbi->clk);
 718
 719         pxa168fb_set_par(info);
 720
 721         /*
 722          * Configure default register values.
 723          */
 724         writel(0, fbi->reg_base + LCD_SPU_BLANKCOLOR);
 725         writel(mi->io_pin_allocation_mode, fbi->reg_base + SPU_IOPAD_CONTROL);
 726         writel(0, fbi->reg_base + LCD_CFG_GRA_START_ADDR1);
 727         writel(0, fbi->reg_base + LCD_SPU_GRA_OVSA_HPXL_VLN);
 728         writel(0, fbi->reg_base + LCD_SPU_SRAM_PARA0);
 729         writel(CFG_CSB_256x32(0x1)|CFG_CSB_256x24(0x1)|CFG_CSB_256x8(0x1),
 730                 fbi->reg_base + LCD_SPU_SRAM_PARA1);
 731
 732         /*
 733          * Allocate color map.
 734          */
 735         if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
 736                 ret = -ENOMEM;
 737                 goto failed_free_clk;
 738         }
 739
 740         /*
 741          * Register irq handler.
 742          */
 743         ret = request_irq(irq, pxa168fb_handle_irq, IRQF_SHARED,
 744                                         info->fix.id, fbi);
 745         if (ret < 0) {
 746                 dev_err(&pdev->dev, "unable to request IRQ\n");
 747                 ret = -ENXIO;
 748                 goto failed_free_cmap;
 749         }
 750
 751         /*
 752          * Enable GFX interrupt
 753          */
 754         writel(GRA_FRAME_IRQ0_ENA(0x1), fbi->reg_base + SPU_IRQ_ENA);
 755
 756         /*
 757          * Register framebuffer.
 758          */
 759         ret = register_framebuffer(info);
 760         if (ret < 0) {
 761                 dev_err(&pdev->dev, "Failed to register pxa168-fb: %d\n", ret);
 762                 ret = -ENXIO;
 763                 goto failed_free_irq;
 764         }
 765
 766         platform_set_drvdata(pdev, fbi);
 767         return 0;
 768
 769 failed_free_irq:
 770         free_irq(irq, fbi);
 771 failed_free_cmap:
 772         fb_dealloc_cmap(&info->cmap);
 773 failed_free_clk:
 774         clk_disable(fbi->clk);
 775 failed_free_fbmem:
 776         dma_free_coherent(fbi->dev, info->fix.smem_len,
 777                         info->screen_base, fbi->fb_start_dma);
 778 failed:
 779         kfree(info);
 780         clk_put(clk);
 781
 782         dev_err(&pdev->dev, "frame buffer device init failed with %d\n", ret);
 783         return ret;
 784 }
 785
 786 static struct platform_driver pxa168fb_driver = {
 787         .driver         = {
 788                 .name   = "pxa168-fb",
 789                 .owner  = THIS_MODULE,
 790         },
 791         .probe          = pxa168fb_probe,
 792 };
 793
 794 static int __devinit pxa168fb_init(void)
 795 {
 796         return platform_driver_register(&pxa168fb_driver);
 797 }
 798 module_init(pxa168fb_init);
 799
 800 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com> "
 801               "Green Wan <gwan@marvell.com>");
 802 MODULE_DESCRIPTION("Framebuffer driver for PXA168/910");
 803 MODULE_LICENSE("GPL");