target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-fb.c

   1 /* Smedia Glamo 336x/337x driver
   2  *
   3  * (C) 2007-2008 by Openmoko, Inc.
   4  * Author: Harald Welte <laforge@openmoko.org>
   5  * All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/errno.h>
  26 #include <linux/string.h>
  27 #include <linux/mm.h>
  28 #include <linux/slab.h>
  29 #include <linux/delay.h>
  30 #include <linux/fb.h>
  31 #include <linux/init.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/workqueue.h>
  36 #include <linux/wait.h>
  37 #include <linux/platform_device.h>
  38 #include <linux/clk.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/io.h>
  41 #include <linux/uaccess.h>
  42
  43 #include <asm/div64.h>
  44
  45 #ifdef CONFIG_PM
  46 #include <linux/pm.h>
  47 #endif
  48
  49 #include <linux/glamofb.h>
  50
  51 #include "glamo-regs.h"
  52 #include "glamo-core.h"
  53
  54 #ifndef DEBUG
  55 #define GLAMO_LOG(...)
  56 #else
  57 #define GLAMO_LOG(...) \
  58 do { \
  59         printk(KERN_DEBUG "in %s:%s:%d", __FILE__, __func__, __LINE__); \
  60         printk(KERN_DEBUG __VA_ARGS__); \
  61 } while (0);
  62 #endif
  63
  64 static void glamofb_program_mode(struct glamofb_handle* glamo);
  65
  66 struct glamofb_handle {
  67         struct fb_info *fb;
  68         struct device *dev;
  69         struct resource *reg;
  70         struct resource *fb_res;
  71         char __iomem *base;
  72         struct glamofb_platform_data *mach_info;
  73         char __iomem *cursor_addr;
  74         int cursor_on;
  75         u_int32_t pseudo_pal[16];
  76         spinlock_t lock_cmd;
  77         int blank_mode;
  78         int mode_set; /* 0 if the current display mode hasn't been set on the glamo */
  79         int output_enabled; /* 0 if the video output is disabled */
  80 };
  81
  82 static void glamo_output_enable(struct glamofb_handle *gfb) {
  83                 struct glamo_core *gcore = gfb->mach_info->glamo;
  84
  85         if (gfb->output_enabled)
  86                 return;
  87
  88         /* enable the pixel clock if off */
  89         glamo_engine_clkreg_set(gcore,
  90                 GLAMO_ENGINE_LCD,
  91                 GLAMO_CLOCK_LCD_EN_DCLK,
  92                 GLAMO_CLOCK_LCD_EN_DCLK);
  93
  94         gfb->output_enabled = 1;
  95         if (!gfb->mode_set)
  96                 glamofb_program_mode(gfb);
  97 }
  98
  99 static void glamo_output_disable(struct glamofb_handle *gfb) {
 100         struct glamo_core *gcore = gfb->mach_info->glamo;
 101
 102         if (!gfb->output_enabled)
 103                 return;
 104
 105         /* enable the pixel clock if off */
 106         glamo_engine_clkreg_set(gcore,
 107                 GLAMO_ENGINE_LCD,
 108                 GLAMO_CLOCK_LCD_EN_DCLK,
 109                 0);
 110
 111         gfb->output_enabled = 0;
 112 }
 113
 114
 115 static int reg_read(struct glamofb_handle *glamo,
 116                            u_int16_t reg)
 117 {
 118         int i = 0;
 119
 120         for (i = 0; i != 2; i++)
 121                 nop();
 122
 123         return readw(glamo->base + reg);
 124 }
 125
 126 static void reg_write(struct glamofb_handle *glamo,
 127                              u_int16_t reg, u_int16_t val)
 128 {
 129         int i = 0;
 130
 131         for (i = 0; i != 2; i++)
 132                 nop();
 133
 134         writew(val, glamo->base + reg);
 135 }
 136
 137 static struct glamo_script glamo_regs[] = {
 138         { GLAMO_REG_LCD_MODE1, 0x0020 },
 139         /* no display rotation, no hardware cursor, no dither, no gamma,
 140          * no retrace flip, vsync low-active, hsync low active,
 141          * no TVCLK, no partial display, hw dest color from fb,
 142          * no partial display mode, LCD1, software flip,  */
 143         { GLAMO_REG_LCD_MODE2, 0x9020 },
 144           /* video flip, no ptr, no ptr, dhclk off,
 145            * normal mode,  no cpuif,
 146            * res, serial msb first, single fb, no fr ctrl,
 147            * cpu if bits all zero, no crc
 148            * 0000 0000 0010  0000 */
 149         { GLAMO_REG_LCD_MODE3, 0x0b40 },
 150           /* src data rgb565, res, 18bit rgb666
 151            * 000 01 011 0100 0000 */
 152         { GLAMO_REG_LCD_POLARITY, 0x440c },
 153           /* DE high active, no cpu/lcd if, cs0 force low, a0 low active,
 154            * np cpu if, 9bit serial data, sclk rising edge latch data
 155            * 01 00 0 100 0 000 01 0 0 */
 156         /* The following values assume 640*480@16bpp */
 157         { GLAMO_REG_LCD_A_BASE1, 0x0000 }, /* display A base address 15:0 */
 158         { GLAMO_REG_LCD_A_BASE2, 0x0000 }, /* display A base address 22:16 */
 159         { GLAMO_REG_LCD_CURSOR_BASE1, 0xC000 }, /* cursor base address 15:0 */
 160         { GLAMO_REG_LCD_CURSOR_BASE2, 0x0012 }, /* cursor base address 22:16 */
 161         { GLAMO_REG_LCD_COMMAND2, 0x0000 }, /* display page A */
 162 };
 163
 164 static int glamofb_run_script(struct glamofb_handle *glamo,
 165                                 struct glamo_script *script, int len)
 166 {
 167         int i;
 168
 169         if (glamo->mach_info->glamo->suspending) {
 170                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 171                                 "IGNORING glamofb_run_script while "
 172                                                                  "suspended\n");
 173                 return -EBUSY;
 174         }
 175
 176         for (i = 0; i < len; i++) {
 177                 struct glamo_script *line = &script[i];
 178
 179                 if (line->reg == 0xffff)
 180                         return 0;
 181                 else if (line->reg == 0xfffe)
 182                         msleep(line->val);
 183                 else
 184                         reg_write(glamo, script[i].reg, script[i].val);
 185         }
 186
 187         return 0;
 188 }
 189
 190 static int glamofb_check_var(struct fb_var_screeninfo *var,
 191                              struct fb_info *info)
 192 {
 193         struct glamofb_handle *glamo = info->par;
 194
 195         if (glamo->mach_info->glamo->suspending) {
 196                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 197                                 "IGNORING glamofb_check_var while "
 198                                                                  "suspended\n");
 199                 return -EBUSY;
 200         }
 201
 202         if (var->bits_per_pixel != 16)
 203                 var->bits_per_pixel = 16;
 204
 205         var->height = glamo->mach_info->height;
 206         var->width = glamo->mach_info->width;
 207
 208         /* FIXME: set rgb positions */
 209         switch (var->bits_per_pixel) {
 210         case 16:
 211                 switch (reg_read(glamo, GLAMO_REG_LCD_MODE3) & 0xc000) {
 212                 case GLAMO_LCD_SRC_RGB565:
 213                         var->red.offset         = 11;
 214                         var->green.offset       = 5;
 215                         var->blue.offset        = 0;
 216                         var->red.length         = 5;
 217                         var->green.length       = 6;
 218                         var->blue.length        = 5;
 219                         var->transp.length      = 0;
 220                         break;
 221                 case GLAMO_LCD_SRC_ARGB1555:
 222                         var->transp.offset      = 15;
 223                         var->red.offset         = 10;
 224                         var->green.offset       = 5;
 225                         var->blue.offset        = 0;
 226                         var->transp.length      = 1;
 227                         var->red.length         = 5;
 228                         var->green.length       = 5;
 229                         var->blue.length        = 5;
 230                         break;
 231                 case GLAMO_LCD_SRC_ARGB4444:
 232                         var->transp.offset      = 12;
 233                         var->red.offset         = 8;
 234                         var->green.offset       = 4;
 235                         var->blue.offset        = 0;
 236                         var->transp.length      = 4;
 237                         var->red.length         = 4;
 238                         var->green.length       = 4;
 239                         var->blue.length        = 4;
 240                         break;
 241                 }
 242                 break;
 243         case 24:
 244         case 32:
 245         default:
 246                 /* The Smedia Glamo doesn't support anything but 16bit color */
 247                 printk(KERN_ERR
 248                        "Smedia driver does not [yet?] support 24/32bpp\n");
 249                 return -EINVAL;
 250         }
 251
 252         return 0;
 253 }
 254
 255 static void reg_set_bit_mask(struct glamofb_handle *glamo,
 256                              u_int16_t reg, u_int16_t mask,
 257                              u_int16_t val)
 258 {
 259         u_int16_t tmp;
 260
 261         val &= mask;
 262
 263         tmp = reg_read(glamo, reg);
 264         tmp &= ~mask;
 265         tmp |= val;
 266         reg_write(glamo, reg, tmp);
 267 }
 268
 269 #define GLAMO_LCD_WIDTH_MASK 0x03FF
 270 #define GLAMO_LCD_HEIGHT_MASK 0x03FF
 271 #define GLAMO_LCD_PITCH_MASK 0x07FE
 272 #define GLAMO_LCD_HV_TOTAL_MASK 0x03FF
 273 #define GLAMO_LCD_HV_RETR_START_MASK 0x03FF
 274 #define GLAMO_LCD_HV_RETR_END_MASK 0x03FF
 275 #define GLAMO_LCD_HV_RETR_DISP_START_MASK 0x03FF
 276 #define GLAMO_LCD_HV_RETR_DISP_END_MASK 0x03FF
 277
 278 /* the caller has to enxure lock_cmd is held and we are in cmd mode */
 279 static void __rotate_lcd(struct glamofb_handle *glamo, __u32 rotation)
 280 {
 281         int glamo_rot;
 282
 283         if (glamo->mach_info->glamo->suspending) {
 284                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 285                                 "IGNORING rotate_lcd while "
 286                                                                  "suspended\n");
 287                 return;
 288         }
 289
 290         switch (rotation) {
 291         case FB_ROTATE_CW:
 292                 glamo_rot = GLAMO_LCD_ROT_MODE_90;
 293                 break;
 294         case FB_ROTATE_UD:
 295                 glamo_rot = GLAMO_LCD_ROT_MODE_180;
 296                 break;
 297         case FB_ROTATE_CCW:
 298                 glamo_rot = GLAMO_LCD_ROT_MODE_270;
 299                 break;
 300         default:
 301                 glamo_rot = GLAMO_LCD_ROT_MODE_0;
 302                 break;
 303         }
 304
 305         reg_set_bit_mask(glamo,
 306                          GLAMO_REG_LCD_WIDTH,
 307                          GLAMO_LCD_ROT_MODE_MASK,
 308                          glamo_rot);
 309         reg_set_bit_mask(glamo,
 310                          GLAMO_REG_LCD_MODE1,
 311                          GLAMO_LCD_MODE1_ROTATE_EN,
 312                          (glamo_rot != GLAMO_LCD_ROT_MODE_0) ?
 313                                  GLAMO_LCD_MODE1_ROTATE_EN : 0);
 314 }
 315
 316 static void glamofb_program_mode(struct glamofb_handle* gfb) {
 317         int sync, bp, disp, fp, total;
 318         unsigned long flags;
 319         struct glamo_core *gcore = gfb->mach_info->glamo;
 320         struct fb_var_screeninfo *var = &gfb->fb->var;
 321
 322         dev_dbg(&gcore->pdev->dev,
 323                           "glamofb_program_mode spin_lock_irqsave\n");
 324         spin_lock_irqsave(&gfb->lock_cmd, flags);
 325
 326         if (glamofb_cmd_mode(gfb, 1))
 327                 goto out_unlock;
 328
 329         if (var->pixclock)
 330                 glamo_engine_reclock(gcore,
 331                                      GLAMO_ENGINE_LCD,
 332                                      gfb->fb->var.pixclock);
 333
 334         reg_set_bit_mask(gfb,
 335                          GLAMO_REG_LCD_WIDTH,
 336                          GLAMO_LCD_WIDTH_MASK,
 337                          var->xres);
 338         reg_set_bit_mask(gfb,
 339                          GLAMO_REG_LCD_HEIGHT,
 340                          GLAMO_LCD_HEIGHT_MASK,
 341                          var->yres);
 342         reg_set_bit_mask(gfb,
 343                          GLAMO_REG_LCD_PITCH,
 344                          GLAMO_LCD_PITCH_MASK,
 345                          gfb->fb->fix.line_length);
 346
 347         /* honour the rotation request */
 348         __rotate_lcd(gfb, var->rotate);
 349
 350         /* update scannout timings */
 351         sync = 0;
 352         bp = sync + var->hsync_len;
 353         disp = bp + var->left_margin;
 354         fp = disp + var->xres;
 355         total = fp + var->right_margin;
 356
 357         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_TOTAL,
 358                          GLAMO_LCD_HV_TOTAL_MASK, total);
 359         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_START,
 360                          GLAMO_LCD_HV_RETR_START_MASK, sync);
 361         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_END,
 362                          GLAMO_LCD_HV_RETR_END_MASK, bp);
 363         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_START,
 364                           GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
 365         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_END,
 366                          GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
 367
 368         sync = 0;
 369         bp = sync + var->vsync_len;
 370         disp = bp + var->upper_margin;
 371         fp = disp + var->yres;
 372         total = fp + var->lower_margin;
 373
 374         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_TOTAL,
 375                          GLAMO_LCD_HV_TOTAL_MASK, total);
 376         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_START,
 377                           GLAMO_LCD_HV_RETR_START_MASK, sync);
 378         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_END,
 379                          GLAMO_LCD_HV_RETR_END_MASK, bp);
 380         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_START,
 381                          GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
 382         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_END,
 383                          GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
 384
 385         glamofb_cmd_mode(gfb, 0);
 386
 387         gfb->mode_set = 1;
 388
 389 out_unlock:
 390         dev_dbg(&gcore->pdev->dev,
 391                       "glamofb_program_mode spin_unlock_irqrestore\n");
 392         spin_unlock_irqrestore(&gfb->lock_cmd, flags);
 393 }
 394
 395
 396 static int glamofb_pan_display(struct fb_var_screeninfo *var,
 397                 struct fb_info *info)
 398 {
 399         return 0;
 400 }
 401
 402 static struct fb_videomode *glamofb_find_mode(struct fb_info *info,
 403         struct fb_var_screeninfo *var) {
 404         struct glamofb_handle *glamo = info->par;
 405         struct glamofb_platform_data *mach_info = glamo->mach_info;
 406         struct fb_videomode *mode;
 407         int i;
 408
 409         for(i = mach_info->num_modes, mode = mach_info->modes; i > 0; --i, ++mode) {
 410                 if (mode->xres == var->xres &&
 411                     mode->yres == var->yres)
 412                         return mode;
 413         }
 414
 415         return NULL;
 416 }
 417
 418 static int glamofb_set_par(struct fb_info *info)
 419 {
 420         struct glamofb_handle *glamo = info->par;
 421         struct fb_var_screeninfo *var = &info->var;
 422         struct fb_videomode *mode;
 423
 424         if (glamo->mach_info->glamo->suspending) {
 425                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 426                                 "IGNORING glamofb_set_par while "
 427                                                                  "suspended\n");
 428                 return -EBUSY;
 429         }
 430
 431         mode = glamofb_find_mode(info, var);
 432         if (!mode)
 433                 return -EINVAL;
 434
 435         fb_videomode_to_var(var, mode);
 436
 437         info->mode = mode;
 438
 439         glamo->mode_set = 0;
 440
 441         switch(var->rotate) {
 442         case FB_ROTATE_CW:
 443         case FB_ROTATE_CCW:
 444                 info->fix.line_length = (var->yres * var->bits_per_pixel) / 8;
 445                 /* FIXME: Limit pixelclock */
 446                 var->pixclock *= 2;
 447                 break;
 448         default:
 449                 info->fix.line_length = (var->xres * var->bits_per_pixel) / 8;
 450                 break;
 451         }
 452
 453         if(glamo->output_enabled)
 454                 glamofb_program_mode(glamo);
 455
 456         return 0;
 457 }
 458
 459 static int glamofb_blank(int blank_mode, struct fb_info *info)
 460 {
 461         struct glamofb_handle *gfb = info->par;
 462
 463         dev_dbg(gfb->dev, "glamofb_blank(%u)\n", blank_mode);
 464
 465         switch (blank_mode) {
 466         case FB_BLANK_VSYNC_SUSPEND:
 467         case FB_BLANK_HSYNC_SUSPEND:
 468                 /* FIXME: add pdata hook/flag to indicate whether
 469                  * we should already switch off pixel clock here */
 470                 break;
 471         case FB_BLANK_POWERDOWN:
 472                 /* disable the pixel clock */
 473                 glamo_output_disable(gfb);
 474                 gfb->blank_mode = blank_mode;
 475                 break;
 476         case FB_BLANK_UNBLANK:
 477         case FB_BLANK_NORMAL:
 478                 glamo_output_enable(gfb);
 479                 gfb->blank_mode = blank_mode;
 480                 break;
 481         }
 482
 483         /* FIXME: once we have proper clock management in glamo-core,
 484          * we can determine if other units need MCLK1 or the PLL, and
 485          * disable it if not used. */
 486         return 0;
 487 }
 488
 489 static inline unsigned int chan_to_field(unsigned int chan,
 490                                          struct fb_bitfield *bf)
 491 {
 492         chan &= 0xffff;
 493         chan >>= 16 - bf->length;
 494         return chan << bf->offset;
 495 }
 496
 497 static int glamofb_setcolreg(unsigned regno,
 498                              unsigned red, unsigned green, unsigned blue,
 499                              unsigned transp, struct fb_info *info)
 500 {
 501         struct glamofb_handle *glamo = info->par;
 502         unsigned int val;
 503
 504         if (glamo->mach_info->glamo->suspending) {
 505                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 506                                 "IGNORING glamofb_set_par while "
 507                                                                  "suspended\n");
 508                 return -EBUSY;
 509         }
 510
 511         switch (glamo->fb->fix.visual) {
 512         case FB_VISUAL_TRUECOLOR:
 513         case FB_VISUAL_DIRECTCOLOR:
 514                 /* true-colour, use pseuo-palette */
 515
 516                 if (regno < 16) {
 517                         u32 *pal = glamo->fb->pseudo_palette;
 518
 519                         val  = chan_to_field(red, &glamo->fb->var.red);
 520                         val |= chan_to_field(green, &glamo->fb->var.green);
 521                         val |= chan_to_field(blue, &glamo->fb->var.blue);
 522
 523                         pal[regno] = val;
 524                 };
 525                 break;
 526         default:
 527                 return 1; /* unknown type */
 528         }
 529
 530         return 0;
 531 }
 532
 533 static int glamofb_ioctl(struct fb_info *info, unsigned int cmd,
 534                          unsigned long arg) {
 535         struct glamofb_handle *gfb = (struct glamofb_handle*)info->par;
 536         struct glamo_core *gcore = gfb->mach_info->glamo;
 537         int retval = -ENOTTY;
 538
 539         switch (cmd) {
 540         case GLAMOFB_ENGINE_ENABLE:
 541                 retval = glamo_engine_enable(gcore, arg);
 542                 break;
 543         case GLAMOFB_ENGINE_DISABLE:
 544                 retval = glamo_engine_disable(gcore, arg);
 545                 break;
 546         case GLAMOFB_ENGINE_RESET:
 547                 glamo_engine_reset(gcore, arg);
 548                 retval = 0;
 549                 break;
 550         default:
 551                 break;
 552         }
 553
 554         return retval;
 555 }
 556
 557
 558 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 559 static inline void glamofb_vsync_wait(struct glamofb_handle *glamo,
 560                 int line, int size, int range)
 561 {
 562         int count[2];
 563
 564         do {
 565                 count[0] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
 566                 count[1] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
 567         } while (count[0] != count[1] ||
 568                         (line < count[0] + range &&
 569                          size > count[0] - range) ||
 570                         count[0] < range * 2);
 571 }
 572
 573 /*
 574  * Enable/disable the hardware cursor mode altogether
 575  * (for blinking and such, use glamofb_cursor()).
 576  */
 577 static void glamofb_cursor_onoff(struct glamofb_handle *glamo, int on)
 578 {
 579         int y, size;
 580
 581         if (glamo->cursor_on) {
 582                 y = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_POS);
 583                 size = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE);
 584
 585                 glamofb_vsync_wait(glamo, y, size, 30);
 586         }
 587
 588         reg_set_bit_mask(glamo, GLAMO_REG_LCD_MODE1,
 589                         GLAMO_LCD_MODE1_CURSOR_EN,
 590                         on ? GLAMO_LCD_MODE1_CURSOR_EN : 0);
 591         glamo->cursor_on = on;
 592
 593         /* Hide the cursor by default */
 594         reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE, 0);
 595 }
 596
 597 static int glamofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 598 {
 599         struct glamofb_handle *glamo = info->par;
 600         unsigned long flags;
 601
 602         spin_lock_irqsave(&glamo->lock_cmd, flags);
 603
 604         reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE,
 605                         cursor->enable ? cursor->image.width : 0);
 606
 607         if (cursor->set & FB_CUR_SETPOS) {
 608                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_POS,
 609                           cursor->image.dx);
 610                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_POS,
 611                           cursor->image.dy);
 612         }
 613
 614         if (cursor->set & FB_CUR_SETCMAP) {
 615                 uint16_t fg = glamo->pseudo_pal[cursor->image.fg_color];
 616                 uint16_t bg = glamo->pseudo_pal[cursor->image.bg_color];
 617
 618                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_FG_COLOR, fg);
 619                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_BG_COLOR, bg);
 620                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_DST_COLOR, fg);
 621         }
 622
 623         if (cursor->set & FB_CUR_SETHOT)
 624                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PRESET,
 625                                 (cursor->hot.x << 8) | cursor->hot.y);
 626
 627         if ((cursor->set & FB_CUR_SETSIZE) ||
 628             (cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE))) {
 629                 int x, y, pitch, op;
 630                 const uint8_t *pcol = cursor->image.data;
 631                 const uint8_t *pmsk = cursor->mask;
 632                 uint8_t __iomem *dst = glamo->cursor_addr;
 633                 uint8_t dcol = 0;
 634                 uint8_t dmsk = 0;
 635                 uint8_t byte = 0;
 636
 637                 if (cursor->image.depth > 1) {
 638                         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
 639                         return -EINVAL;
 640                 }
 641
 642                 pitch = ((cursor->image.width + 7) >> 2) & ~1;
 643                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PITCH,
 644                         pitch);
 645                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE,
 646                         cursor->image.height);
 647
 648                 for (y = 0; y < cursor->image.height; y++) {
 649                         byte = 0;
 650                         for (x = 0; x < cursor->image.width; x++) {
 651                                 if ((x % 8) == 0) {
 652                                         dcol = *pcol++;
 653                                         dmsk = *pmsk++;
 654                                 } else {
 655                                         dcol >>= 1;
 656                                         dmsk >>= 1;
 657                                 }
 658
 659                                 if (cursor->rop == ROP_COPY)
 660                                         op = (dmsk & 1) ?
 661                                                 (dcol & 1) ? 1 : 3 : 0;
 662                                 else
 663                                         op = ((dmsk & 1) << 1) |
 664                                                 ((dcol & 1) << 0);
 665                                 byte |= op << ((x & 3) << 1);
 666
 667                                 if (x % 4 == 3) {
 668                                         writeb(byte, dst + x / 4);
 669                                         byte = 0;
 670                                 }
 671                         }
 672                         if (x % 4) {
 673                                 writeb(byte, dst + x / 4);
 674                                 byte = 0;
 675                         }
 676
 677                         dst += pitch;
 678                 }
 679         }
 680
 681         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
 682
 683         return 0;
 684 }
 685 #endif
 686
 687 static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb)
 688 {
 689         /* DGCMdQempty -- 1 == command queue is empty */
 690         return reg_read(gfb, GLAMO_REG_LCD_STATUS1) & (1 << 15);
 691 }
 692
 693 /* call holding gfb->lock_cmd  when locking, until you unlock */
 694 int glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
 695 {
 696         int timeout = 2000000;
 697
 698         if (gfb->mach_info->glamo->suspending) {
 699                 dev_err(&gfb->mach_info->glamo->pdev->dev,
 700                                 "IGNORING glamofb_cmd_mode while "
 701                                                                  "suspended\n");
 702                 return -EBUSY;
 703         }
 704
 705         dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on);
 706         if (on) {
 707                 dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ",
 708                         __func__);
 709                 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
 710                         yield();
 711                 if (timeout < 0) {
 712                         printk(KERN_ERR"*************"
 713                                        "glamofb cmd_queue never got empty"
 714                                        "*************\n");
 715                         return -EIO;
 716                 }
 717                 dev_dbg(gfb->dev, "empty!\n");
 718
 719                 /* display the entire frame then switch to command */
 720                 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 721                           GLAMO_LCD_CMD_TYPE_DISP |
 722                           GLAMO_LCD_CMD_DATA_FIRE_VSYNC);
 723
 724                 /* wait until lcd idle */
 725                 dev_dbg(gfb->dev, "waiting for lcd idle: ");
 726                 timeout = 2000000;
 727                 while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) &&
 728                       (timeout--))
 729                         /* yield() */;
 730                 if (timeout < 0) {
 731                         printk(KERN_ERR"*************"
 732                                        "glamofb lcd never idle"
 733                                        "*************\n");
 734                         return -EIO;
 735                 }
 736
 737                 mdelay(100);
 738
 739                 dev_dbg(gfb->dev, "cmd mode entered\n");
 740
 741         } else {
 742                 /* RGB interface needs vsync/hsync */
 743                 if (reg_read(gfb, GLAMO_REG_LCD_MODE3) & GLAMO_LCD_MODE3_RGB)
 744                         reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 745                                   GLAMO_LCD_CMD_TYPE_DISP |
 746                                   GLAMO_LCD_CMD_DATA_DISP_SYNC);
 747
 748                 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 749                           GLAMO_LCD_CMD_TYPE_DISP |
 750                           GLAMO_LCD_CMD_DATA_DISP_FIRE);
 751         }
 752
 753         return 0;
 754 }
 755 EXPORT_SYMBOL_GPL(glamofb_cmd_mode);
 756
 757
 758 int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val)
 759 {
 760         int timeout = 200000;
 761
 762         if (gfb->mach_info->glamo->suspending) {
 763                 dev_err(&gfb->mach_info->glamo->pdev->dev,
 764                                 "IGNORING glamofb_cmd_write while "
 765                                                                  "suspended\n");
 766                 return -EBUSY;
 767         }
 768
 769         dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n", __func__);
 770         while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
 771                 yield();
 772         if (timeout < 0) {
 773                 printk(KERN_ERR"*************"
 774                                 "glamofb cmd_queue never got empty"
 775                                 "*************\n");
 776                 return 1;
 777         }
 778         dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val);
 779
 780         reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val);
 781
 782         return 0;
 783 }
 784 EXPORT_SYMBOL_GPL(glamofb_cmd_write);
 785
 786 static struct fb_ops glamofb_ops = {
 787         .owner          = THIS_MODULE,
 788         .fb_check_var   = glamofb_check_var,
 789         .fb_pan_display = glamofb_pan_display,
 790         .fb_set_par     = glamofb_set_par,
 791         .fb_blank       = glamofb_blank,
 792         .fb_setcolreg   = glamofb_setcolreg,
 793         .fb_ioctl = glamofb_ioctl,
 794 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 795         .fb_cursor      = glamofb_cursor,
 796 #endif
 797         .fb_fillrect    = cfb_fillrect,
 798         .fb_copyarea    = cfb_copyarea,
 799         .fb_imageblit   = cfb_imageblit,
 800 };
 801
 802 static int glamofb_init_regs(struct glamofb_handle *glamo)
 803 {
 804         struct fb_info *info = glamo->fb;
 805
 806         glamofb_check_var(&info->var, info);
 807         glamofb_run_script(glamo, glamo_regs, ARRAY_SIZE(glamo_regs));
 808         glamofb_set_par(info);
 809
 810         return 0;
 811 }
 812
 813 static int __init glamofb_probe(struct platform_device *pdev)
 814 {
 815         int rc = -EIO;
 816         struct fb_info *fbinfo;
 817         struct glamofb_handle *glamofb;
 818         struct glamofb_platform_data *mach_info = pdev->dev.platform_data;
 819
 820         printk(KERN_INFO "SMEDIA Glamo frame buffer driver (C) 2007 "
 821                 "Openmoko, Inc.\n");
 822
 823         fbinfo = framebuffer_alloc(sizeof(struct glamofb_handle), &pdev->dev);
 824         if (!fbinfo)
 825                 return -ENOMEM;
 826
 827         glamofb = fbinfo->par;
 828         glamofb->fb = fbinfo;
 829         glamofb->dev = &pdev->dev;
 830
 831         glamofb->blank_mode = FB_BLANK_POWERDOWN;
 832
 833         strcpy(fbinfo->fix.id, "SMedia Glamo");
 834
 835         glamofb->reg = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 836                                                     "glamo-fb-regs");
 837         if (!glamofb->reg) {
 838                 dev_err(&pdev->dev, "platform device with no registers?\n");
 839                 rc = -ENOENT;
 840                 goto out_free;
 841         }
 842
 843         glamofb->fb_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 844                                                         "glamo-fb-mem");
 845         if (!glamofb->fb_res) {
 846                 dev_err(&pdev->dev, "platform device with no memory ?\n");
 847                 rc = -ENOENT;
 848                 goto out_free;
 849         }
 850
 851         glamofb->reg = request_mem_region(glamofb->reg->start,
 852                                           resource_size(glamofb->reg), pdev->name);
 853         if (!glamofb->reg) {
 854                 dev_err(&pdev->dev, "failed to request mmio region\n");
 855                 goto out_free;
 856         }
 857
 858         glamofb->fb_res = request_mem_region(glamofb->fb_res->start,
 859                                              resource_size(glamofb->fb_res),
 860                                              pdev->name);
 861         if (!glamofb->fb_res) {
 862                 dev_err(&pdev->dev, "failed to request vram region\n");
 863                 goto out_release_reg;
 864         }
 865
 866         /* we want to remap only the registers required for this core
 867          * driver. */
 868         glamofb->base = ioremap_nocache(glamofb->reg->start, resource_size(glamofb->reg));
 869         if (!glamofb->base) {
 870                 dev_err(&pdev->dev, "failed to ioremap() mmio memory\n");
 871                 goto out_release_fb;
 872         }
 873
 874         fbinfo->fix.smem_start = (unsigned long) glamofb->fb_res->start;
 875         fbinfo->fix.smem_len = (__u32) resource_size(glamofb->fb_res);
 876
 877         fbinfo->screen_base = ioremap(glamofb->fb_res->start,
 878                                        resource_size(glamofb->fb_res));
 879         if (!fbinfo->screen_base) {
 880                 dev_err(&pdev->dev, "failed to ioremap() vram memory\n");
 881                 goto out_release_fb;
 882         }
 883         glamofb->cursor_addr = fbinfo->screen_base + 0x12C000;
 884
 885         platform_set_drvdata(pdev, glamofb);
 886
 887         glamofb->mach_info = pdev->dev.platform_data;
 888
 889         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 890         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 891         fbinfo->fix.type_aux = 0;
 892         fbinfo->fix.xpanstep = 0;
 893         fbinfo->fix.ypanstep = 0;
 894         fbinfo->fix.ywrapstep = 0;
 895         fbinfo->fix.accel = FB_ACCEL_GLAMO;
 896
 897
 898         fbinfo->fbops = &glamofb_ops;
 899         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 900         fbinfo->pseudo_palette = &glamofb->pseudo_pal;
 901
 902         fbinfo->mode = mach_info->modes;
 903         fb_videomode_to_var(&fbinfo->var, fbinfo->mode);
 904         fbinfo->var.bits_per_pixel = 16;
 905         fbinfo->var.nonstd = 0;
 906         fbinfo->var.activate = FB_ACTIVATE_NOW;
 907         fbinfo->var.height = mach_info->height;
 908         fbinfo->var.width = mach_info->width;
 909         fbinfo->var.accel_flags = 0;
 910         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 911
 912         glamo_engine_enable(mach_info->glamo, GLAMO_ENGINE_LCD);
 913         glamo_engine_reset(mach_info->glamo, GLAMO_ENGINE_LCD);
 914         glamofb->output_enabled = 1;
 915         glamofb->mode_set = 1;
 916
 917         dev_info(&pdev->dev, "spin_lock_init\n");
 918         spin_lock_init(&glamofb->lock_cmd);
 919         glamofb_init_regs(glamofb);
 920 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 921         glamofb_cursor_onoff(glamofb, 1);
 922 #endif
 923
 924         fb_videomode_to_modelist(mach_info->modes, mach_info->num_modes,
 925                                  &fbinfo->modelist);
 926
 927         rc = register_framebuffer(fbinfo);
 928         if (rc < 0) {
 929                 dev_err(&pdev->dev, "failed to register framebuffer\n");
 930                 goto out_unmap_fb;
 931         }
 932
 933         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 934                 fbinfo->node, fbinfo->fix.id);
 935
 936         return 0;
 937
 938 out_unmap_fb:
 939         iounmap(fbinfo->screen_base);
 940         iounmap(glamofb->base);
 941 out_release_fb:
 942         release_mem_region(glamofb->fb_res->start, resource_size(glamofb->fb_res));
 943 out_release_reg:
 944         release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
 945 out_free:
 946         framebuffer_release(fbinfo);
 947         return rc;
 948 }
 949
 950 static int glamofb_remove(struct platform_device *pdev)
 951 {
 952         struct glamofb_handle *glamofb = platform_get_drvdata(pdev);
 953
 954         platform_set_drvdata(pdev, NULL);
 955         iounmap(glamofb->base);
 956         release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
 957         kfree(glamofb);
 958
 959         return 0;
 960 }
 961
 962 #ifdef CONFIG_PM
 963
 964 static int glamofb_suspend(struct platform_device *pdev, pm_message_t state)
 965 {
 966         struct glamofb_handle *gfb = platform_get_drvdata(pdev);
 967
 968         /* we need to stop anything touching our framebuffer */
 969         fb_set_suspend(gfb->fb, 1);
 970
 971         /* seriously -- nobody is allowed to touch glamo memory when we
 972          * are suspended or we lock on nWAIT
 973          */
 974         /* iounmap(gfb->fb->screen_base); */
 975
 976         return 0;
 977 }
 978
 979 static int glamofb_resume(struct platform_device *pdev)
 980 {
 981         struct glamofb_handle *gfb = platform_get_drvdata(pdev);
 982         struct glamofb_platform_data *mach_info = pdev->dev.platform_data;
 983
 984         /* OK let's allow framebuffer ops again */
 985         /* gfb->fb->screen_base = ioremap(gfb->fb_res->start,
 986                                        resource_size(gfb->fb_res)); */
 987         glamo_engine_enable(mach_info->glamo, GLAMO_ENGINE_LCD);
 988         glamo_engine_reset(mach_info->glamo, GLAMO_ENGINE_LCD);
 989
 990         printk(KERN_ERR"spin_lock_init\n");
 991         spin_lock_init(&gfb->lock_cmd);
 992         glamofb_init_regs(gfb);
 993 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 994         glamofb_cursor_onoff(gfb, 1);
 995 #endif
 996
 997         fb_set_suspend(gfb->fb, 0);
 998
 999         return 0;
1000 }
1001 #else
1002 #define glamofb_suspend NULL
1003 #define glamofb_resume  NULL
1004 #endif
1005
1006 static struct platform_driver glamofb_driver = {
1007         .probe          = glamofb_probe,
1008         .remove         = glamofb_remove,
1009         .suspend        = glamofb_suspend,
1010         .resume = glamofb_resume,
1011         .driver         = {
1012                 .name   = "glamo-fb",
1013                 .owner  = THIS_MODULE,
1014         },
1015 };
1016
1017 static int __devinit glamofb_init(void)
1018 {
1019         return platform_driver_register(&glamofb_driver);
1020 }
1021
1022 static void __exit glamofb_cleanup(void)
1023 {
1024         platform_driver_unregister(&glamofb_driver);
1025 }
1026
1027 module_init(glamofb_init);
1028 module_exit(glamofb_cleanup);
1029
1030 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
1031 MODULE_DESCRIPTION("Smedia Glamo 336x/337x framebuffer driver");
1032 MODULE_LICENSE("GPL");