target/linux/s3c24xx/files-2.6.31/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/string.h>
  26 #include <linux/mm.h>
  27 #include <linux/delay.h>
  28 #include <linux/fb.h>
  29 #include <linux/console.h>
  30 #include <linux/init.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/io.h>
  34 #include <linux/mfd/glamo.h>
  35
  36 #include <asm/div64.h>
  37
  38 #ifdef CONFIG_PM
  39 #include <linux/pm.h>
  40 #endif
  41
  42 #include <linux/glamofb.h>
  43
  44 #include "glamo-regs.h"
  45 #include "glamo-core.h"
  46
  47 static void glamofb_program_mode(struct glamofb_handle* glamo);
  48
  49 struct glamofb_handle {
  50         struct glamo_core *core;
  51         struct fb_info *fb;
  52         struct device *dev;
  53         struct resource *reg;
  54         struct resource *fb_res;
  55         char __iomem *base;
  56         struct glamo_fb_platform_data *mach_info;
  57         char __iomem *cursor_addr;
  58         int cursor_on;
  59         u_int32_t pseudo_pal[16];
  60         spinlock_t lock_cmd;
  61         int blank_mode;
  62         int mode_set; /* 0 if the current display mode hasn't been set on the glamo */
  63         int output_enabled; /* 0 if the video output is disabled */
  64 };
  65
  66 static void glamo_output_enable(struct glamofb_handle *gfb) {
  67         struct glamo_core *gcore = gfb->core;
  68
  69         if (gfb->output_enabled)
  70                 return;
  71
  72         /* enable the pixel clock if off */
  73     glamo_engine_enable(gcore, GLAMO_ENGINE_LCD);
  74
  75         gfb->output_enabled = 1;
  76         if (!gfb->mode_set)
  77                 glamofb_program_mode(gfb);
  78 }
  79
  80 static void glamo_output_disable(struct glamofb_handle *gfb) {
  81         struct glamo_core *gcore = gfb->core;
  82
  83         if (!gfb->output_enabled)
  84                 return;
  85
  86         /* enable the pixel clock if off */
  87     glamo_engine_suspend(gcore, GLAMO_ENGINE_LCD);
  88
  89         gfb->output_enabled = 0;
  90 }
  91
  92
  93 static int reg_read(struct glamofb_handle *glamo,
  94                            u_int16_t reg)
  95 {
  96         int i = 0;
  97
  98         for (i = 0; i != 2; i++)
  99                 nop();
 100
 101         return readw(glamo->base + reg);
 102 }
 103
 104 static void reg_write(struct glamofb_handle *glamo,
 105                              u_int16_t reg, u_int16_t val)
 106 {
 107         int i = 0;
 108
 109         for (i = 0; i != 2; i++)
 110                 nop();
 111
 112         writew(val, glamo->base + reg);
 113 }
 114
 115 static struct glamo_script glamo_regs[] = {
 116         { GLAMO_REG_LCD_MODE1, 0x0020 },
 117         /* no display rotation, no hardware cursor, no dither, no gamma,
 118          * no retrace flip, vsync low-active, hsync low active,
 119          * no TVCLK, no partial display, hw dest color from fb,
 120          * no partial display mode, LCD1, software flip,  */
 121         { GLAMO_REG_LCD_MODE2, 0x9020 },
 122           /* video flip, no ptr, no ptr, dhclk off,
 123            * normal mode,  no cpuif,
 124            * res, serial msb first, single fb, no fr ctrl,
 125            * cpu if bits all zero, no crc
 126            * 0000 0000 0010  0000 */
 127         { GLAMO_REG_LCD_MODE3, 0x0b40 },
 128           /* src data rgb565, res, 18bit rgb666
 129            * 000 01 011 0100 0000 */
 130         { GLAMO_REG_LCD_POLARITY, 0x440c },
 131           /* DE high active, no cpu/lcd if, cs0 force low, a0 low active,
 132            * np cpu if, 9bit serial data, sclk rising edge latch data
 133            * 01 00 0 100 0 000 01 0 0 */
 134         /* The following values assume 640*480@16bpp */
 135         { GLAMO_REG_LCD_A_BASE1, 0x0000 }, /* display A base address 15:0 */
 136         { GLAMO_REG_LCD_A_BASE2, 0x0000 }, /* display A base address 22:16 */
 137         { GLAMO_REG_LCD_CURSOR_BASE1, 0xC000 }, /* cursor base address 15:0 */
 138         { GLAMO_REG_LCD_CURSOR_BASE2, 0x0012 }, /* cursor base address 22:16 */
 139         { GLAMO_REG_LCD_COMMAND2, 0x0000 }, /* display page A */
 140 };
 141
 142 static int glamofb_run_script(struct glamofb_handle *glamo,
 143                                 struct glamo_script *script, int len)
 144 {
 145         int i;
 146
 147         for (i = 0; i < len; i++) {
 148                 struct glamo_script *line = &script[i];
 149
 150                 if (line->reg == 0xffff)
 151                         return 0;
 152                 else if (line->reg == 0xfffe)
 153                         msleep(line->val);
 154                 else
 155                         reg_write(glamo, script[i].reg, script[i].val);
 156         }
 157
 158         return 0;
 159 }
 160
 161 static int glamofb_check_var(struct fb_var_screeninfo *var,
 162                              struct fb_info *info)
 163 {
 164         struct glamofb_handle *glamo = info->par;
 165
 166         if (var->bits_per_pixel != 16)
 167                 var->bits_per_pixel = 16;
 168
 169         var->height = glamo->mach_info->height;
 170         var->width = glamo->mach_info->width;
 171
 172         /* FIXME: set rgb positions */
 173         switch (var->bits_per_pixel) {
 174         case 16:
 175                 switch (reg_read(glamo, GLAMO_REG_LCD_MODE3) & 0xc000) {
 176                 case GLAMO_LCD_SRC_RGB565:
 177                         var->red.offset         = 11;
 178                         var->green.offset       = 5;
 179                         var->blue.offset        = 0;
 180                         var->red.length         = 5;
 181                         var->green.length       = 6;
 182                         var->blue.length        = 5;
 183                         var->transp.length      = 0;
 184                         break;
 185                 case GLAMO_LCD_SRC_ARGB1555:
 186                         var->transp.offset      = 15;
 187                         var->red.offset         = 10;
 188                         var->green.offset       = 5;
 189                         var->blue.offset        = 0;
 190                         var->transp.length      = 1;
 191                         var->red.length         = 5;
 192                         var->green.length       = 5;
 193                         var->blue.length        = 5;
 194                         break;
 195                 case GLAMO_LCD_SRC_ARGB4444:
 196                         var->transp.offset      = 12;
 197                         var->red.offset         = 8;
 198                         var->green.offset       = 4;
 199                         var->blue.offset        = 0;
 200                         var->transp.length      = 4;
 201                         var->red.length         = 4;
 202                         var->green.length       = 4;
 203                         var->blue.length        = 4;
 204                         break;
 205                 }
 206                 break;
 207         case 24:
 208         case 32:
 209         default:
 210                 /* The Smedia Glamo doesn't support anything but 16bit color */
 211                 printk(KERN_ERR
 212                        "Smedia driver does not [yet?] support 24/32bpp\n");
 213                 return -EINVAL;
 214         }
 215
 216         return 0;
 217 }
 218
 219 static void reg_set_bit_mask(struct glamofb_handle *glamo,
 220                              u_int16_t reg, u_int16_t mask,
 221                              u_int16_t val)
 222 {
 223         u_int16_t tmp;
 224
 225         val &= mask;
 226
 227         tmp = reg_read(glamo, reg);
 228         tmp &= ~mask;
 229         tmp |= val;
 230         reg_write(glamo, reg, tmp);
 231 }
 232
 233 #define GLAMO_LCD_WIDTH_MASK 0x03FF
 234 #define GLAMO_LCD_HEIGHT_MASK 0x03FF
 235 #define GLAMO_LCD_PITCH_MASK 0x07FE
 236 #define GLAMO_LCD_HV_TOTAL_MASK 0x03FF
 237 #define GLAMO_LCD_HV_RETR_START_MASK 0x03FF
 238 #define GLAMO_LCD_HV_RETR_END_MASK 0x03FF
 239 #define GLAMO_LCD_HV_RETR_DISP_START_MASK 0x03FF
 240 #define GLAMO_LCD_HV_RETR_DISP_END_MASK 0x03FF
 241
 242 /* the caller has to enxure lock_cmd is held and we are in cmd mode */
 243 static void __rotate_lcd(struct glamofb_handle *glamo, __u32 rotation)
 244 {
 245         int glamo_rot;
 246
 247         switch (rotation) {
 248         case FB_ROTATE_CW:
 249                 glamo_rot = GLAMO_LCD_ROT_MODE_90;
 250                 break;
 251         case FB_ROTATE_UD:
 252                 glamo_rot = GLAMO_LCD_ROT_MODE_180;
 253                 break;
 254         case FB_ROTATE_CCW:
 255                 glamo_rot = GLAMO_LCD_ROT_MODE_270;
 256                 break;
 257         default:
 258                 glamo_rot = GLAMO_LCD_ROT_MODE_0;
 259                 break;
 260         }
 261
 262         reg_set_bit_mask(glamo,
 263                          GLAMO_REG_LCD_WIDTH,
 264                          GLAMO_LCD_ROT_MODE_MASK,
 265                          glamo_rot);
 266         reg_set_bit_mask(glamo,
 267                          GLAMO_REG_LCD_MODE1,
 268                          GLAMO_LCD_MODE1_ROTATE_EN,
 269                          (glamo_rot != GLAMO_LCD_ROT_MODE_0) ?
 270                                  GLAMO_LCD_MODE1_ROTATE_EN : 0);
 271 }
 272
 273 static void glamofb_program_mode(struct glamofb_handle* gfb) {
 274         int sync, bp, disp, fp, total;
 275         unsigned long flags;
 276         struct glamo_core *gcore = gfb->core;
 277         struct fb_var_screeninfo *var = &gfb->fb->var;
 278
 279         dev_dbg(&gcore->pdev->dev,
 280                           "glamofb_program_mode spin_lock_irqsave\n");
 281         spin_lock_irqsave(&gfb->lock_cmd, flags);
 282
 283         if (glamofb_cmd_mode(gfb, 1))
 284                 goto out_unlock;
 285
 286         if (var->pixclock)
 287                 glamo_engine_reclock(gcore,
 288                                      GLAMO_ENGINE_LCD,
 289                                      (1000000000UL / gfb->fb->var.pixclock) * 1000);
 290
 291         reg_set_bit_mask(gfb,
 292                          GLAMO_REG_LCD_WIDTH,
 293                          GLAMO_LCD_WIDTH_MASK,
 294                          var->xres);
 295         reg_set_bit_mask(gfb,
 296                          GLAMO_REG_LCD_HEIGHT,
 297                          GLAMO_LCD_HEIGHT_MASK,
 298                          var->yres);
 299         reg_set_bit_mask(gfb,
 300                          GLAMO_REG_LCD_PITCH,
 301                          GLAMO_LCD_PITCH_MASK,
 302                          gfb->fb->fix.line_length);
 303
 304         /* honour the rotation request */
 305         __rotate_lcd(gfb, var->rotate);
 306
 307         /* update scannout timings */
 308         sync = 0;
 309         bp = sync + var->hsync_len;
 310         disp = bp + var->left_margin;
 311         fp = disp + var->xres;
 312         total = fp + var->right_margin;
 313
 314         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_TOTAL,
 315                          GLAMO_LCD_HV_TOTAL_MASK, total);
 316         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_START,
 317                          GLAMO_LCD_HV_RETR_START_MASK, sync);
 318         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_END,
 319                          GLAMO_LCD_HV_RETR_END_MASK, bp);
 320         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_START,
 321                           GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
 322         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_END,
 323                          GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
 324
 325         sync = 0;
 326         bp = sync + var->vsync_len;
 327         disp = bp + var->upper_margin;
 328         fp = disp + var->yres;
 329         total = fp + var->lower_margin;
 330
 331         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_TOTAL,
 332                          GLAMO_LCD_HV_TOTAL_MASK, total);
 333         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_START,
 334                           GLAMO_LCD_HV_RETR_START_MASK, sync);
 335         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_END,
 336                          GLAMO_LCD_HV_RETR_END_MASK, bp);
 337         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_START,
 338                          GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
 339         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_END,
 340                          GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
 341
 342         glamofb_cmd_mode(gfb, 0);
 343
 344         gfb->mode_set = 1;
 345
 346 out_unlock:
 347         dev_dbg(&gcore->pdev->dev,
 348                       "glamofb_program_mode spin_unlock_irqrestore\n");
 349         spin_unlock_irqrestore(&gfb->lock_cmd, flags);
 350 }
 351
 352
 353 static int glamofb_pan_display(struct fb_var_screeninfo *var,
 354                 struct fb_info *info)
 355 {
 356         return 0;
 357 }
 358
 359 static struct fb_videomode *glamofb_find_mode(struct fb_info *info,
 360         struct fb_var_screeninfo *var) {
 361         struct glamofb_handle *glamo = info->par;
 362         struct glamo_fb_platform_data *mach_info = glamo->mach_info;
 363         struct fb_videomode *mode;
 364         int i;
 365
 366         for(i = mach_info->num_modes, mode = mach_info->modes; i > 0; --i, ++mode) {
 367                 if (mode->xres == var->xres &&
 368                     mode->yres == var->yres)
 369                         return mode;
 370         }
 371
 372         return NULL;
 373 }
 374
 375 static int glamofb_set_par(struct fb_info *info)
 376 {
 377         struct glamofb_handle *glamo = info->par;
 378         struct fb_var_screeninfo *var = &info->var;
 379         struct fb_videomode *mode;
 380
 381         mode = glamofb_find_mode(info, var);
 382         if (!mode)
 383                 return -EINVAL;
 384
 385         fb_videomode_to_var(var, mode);
 386
 387         info->mode = mode;
 388
 389         glamo->mode_set = 0;
 390
 391         switch(var->rotate) {
 392         case FB_ROTATE_CW:
 393         case FB_ROTATE_CCW:
 394                 info->fix.line_length = (var->yres * var->bits_per_pixel) / 8;
 395                 /* FIXME: Limit pixelclock */
 396                 var->pixclock *= 2;
 397                 break;
 398         default:
 399                 info->fix.line_length = (var->xres * var->bits_per_pixel) / 8;
 400                 break;
 401         }
 402
 403         if(glamo->output_enabled)
 404                 glamofb_program_mode(glamo);
 405
 406         return 0;
 407 }
 408
 409 static int glamofb_blank(int blank_mode, struct fb_info *info)
 410 {
 411         struct glamofb_handle *gfb = info->par;
 412
 413         dev_dbg(gfb->dev, "glamofb_blank(%u)\n", blank_mode);
 414
 415         switch (blank_mode) {
 416         case FB_BLANK_VSYNC_SUSPEND:
 417         case FB_BLANK_HSYNC_SUSPEND:
 418                 /* FIXME: add pdata hook/flag to indicate whether
 419                  * we should already switch off pixel clock here */
 420                 break;
 421         case FB_BLANK_POWERDOWN:
 422                 /* disable the pixel clock */
 423                 glamo_output_disable(gfb);
 424                 gfb->blank_mode = blank_mode;
 425                 break;
 426         case FB_BLANK_UNBLANK:
 427         case FB_BLANK_NORMAL:
 428                 glamo_output_enable(gfb);
 429                 gfb->blank_mode = blank_mode;
 430                 break;
 431         }
 432
 433         /* FIXME: once we have proper clock management in glamo-core,
 434          * we can determine if other units need MCLK1 or the PLL, and
 435          * disable it if not used. */
 436         return 0;
 437 }
 438
 439 static inline unsigned int chan_to_field(unsigned int chan,
 440                                          struct fb_bitfield *bf)
 441 {
 442         chan &= 0xffff;
 443         chan >>= 16 - bf->length;
 444         return chan << bf->offset;
 445 }
 446
 447 static int glamofb_setcolreg(unsigned regno,
 448                              unsigned red, unsigned green, unsigned blue,
 449                              unsigned transp, struct fb_info *info)
 450 {
 451         struct glamofb_handle *glamo = info->par;
 452         unsigned int val;
 453
 454         switch (glamo->fb->fix.visual) {
 455         case FB_VISUAL_TRUECOLOR:
 456         case FB_VISUAL_DIRECTCOLOR:
 457                 /* true-colour, use pseuo-palette */
 458
 459                 if (regno < 16) {
 460                         u32 *pal = glamo->fb->pseudo_palette;
 461
 462                         val  = chan_to_field(red, &glamo->fb->var.red);
 463                         val |= chan_to_field(green, &glamo->fb->var.green);
 464                         val |= chan_to_field(blue, &glamo->fb->var.blue);
 465
 466                         pal[regno] = val;
 467                 };
 468                 break;
 469         default:
 470                 return 1; /* unknown type */
 471         }
 472
 473         return 0;
 474 }
 475
 476 static int glamofb_ioctl(struct fb_info *info, unsigned int cmd,
 477                          unsigned long arg) {
 478         struct glamofb_handle *gfb = (struct glamofb_handle*)info->par;
 479         struct glamo_core *gcore = gfb->core;
 480         int retval = -ENOTTY;
 481
 482         switch (cmd) {
 483         case GLAMOFB_ENGINE_ENABLE:
 484                 retval = glamo_engine_enable(gcore, arg);
 485                 break;
 486         case GLAMOFB_ENGINE_DISABLE:
 487                 retval = glamo_engine_disable(gcore, arg);
 488                 break;
 489         case GLAMOFB_ENGINE_RESET:
 490                 glamo_engine_reset(gcore, arg);
 491                 retval = 0;
 492                 break;
 493         default:
 494                 break;
 495         }
 496
 497         return retval;
 498 }
 499
 500
 501 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 502 static inline void glamofb_vsync_wait(struct glamofb_handle *glamo,
 503                 int line, int size, int range)
 504 {
 505         int count[2];
 506
 507         do {
 508                 count[0] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
 509                 count[1] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
 510         } while (count[0] != count[1] ||
 511                         (line < count[0] + range &&
 512                          size > count[0] - range) ||
 513                         count[0] < range * 2);
 514 }
 515
 516 /*
 517  * Enable/disable the hardware cursor mode altogether
 518  * (for blinking and such, use glamofb_cursor()).
 519  */
 520 static void glamofb_cursor_onoff(struct glamofb_handle *glamo, int on)
 521 {
 522         int y, size;
 523
 524         if (glamo->cursor_on) {
 525                 y = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_POS);
 526                 size = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE);
 527
 528                 glamofb_vsync_wait(glamo, y, size, 30);
 529         }
 530
 531         reg_set_bit_mask(glamo, GLAMO_REG_LCD_MODE1,
 532                         GLAMO_LCD_MODE1_CURSOR_EN,
 533                         on ? GLAMO_LCD_MODE1_CURSOR_EN : 0);
 534         glamo->cursor_on = on;
 535
 536         /* Hide the cursor by default */
 537         reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE, 0);
 538 }
 539
 540 static int glamofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 541 {
 542         struct glamofb_handle *glamo = info->par;
 543         unsigned long flags;
 544
 545         spin_lock_irqsave(&glamo->lock_cmd, flags);
 546
 547         reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE,
 548                         cursor->enable ? cursor->image.width : 0);
 549
 550         if (cursor->set & FB_CUR_SETPOS) {
 551                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_POS,
 552                           cursor->image.dx);
 553                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_POS,
 554                           cursor->image.dy);
 555         }
 556
 557         if (cursor->set & FB_CUR_SETCMAP) {
 558                 uint16_t fg = glamo->pseudo_pal[cursor->image.fg_color];
 559                 uint16_t bg = glamo->pseudo_pal[cursor->image.bg_color];
 560
 561                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_FG_COLOR, fg);
 562                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_BG_COLOR, bg);
 563                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_DST_COLOR, fg);
 564         }
 565
 566         if (cursor->set & FB_CUR_SETHOT)
 567                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PRESET,
 568                                 (cursor->hot.x << 8) | cursor->hot.y);
 569
 570         if ((cursor->set & FB_CUR_SETSIZE) ||
 571             (cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE))) {
 572                 int x, y, pitch, op;
 573                 const uint8_t *pcol = cursor->image.data;
 574                 const uint8_t *pmsk = cursor->mask;
 575                 uint8_t __iomem *dst = glamo->cursor_addr;
 576                 uint8_t dcol = 0;
 577                 uint8_t dmsk = 0;
 578                 uint8_t byte = 0;
 579
 580                 if (cursor->image.depth > 1) {
 581                         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
 582                         return -EINVAL;
 583                 }
 584
 585                 pitch = ((cursor->image.width + 7) >> 2) & ~1;
 586                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PITCH,
 587                         pitch);
 588                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE,
 589                         cursor->image.height);
 590
 591                 for (y = 0; y < cursor->image.height; y++) {
 592                         byte = 0;
 593                         for (x = 0; x < cursor->image.width; x++) {
 594                                 if ((x % 8) == 0) {
 595                                         dcol = *pcol++;
 596                                         dmsk = *pmsk++;
 597                                 } else {
 598                                         dcol >>= 1;
 599                                         dmsk >>= 1;
 600                                 }
 601
 602                                 if (cursor->rop == ROP_COPY)
 603                                         op = (dmsk & 1) ?
 604                                                 (dcol & 1) ? 1 : 3 : 0;
 605                                 else
 606                                         op = ((dmsk & 1) << 1) |
 607                                                 ((dcol & 1) << 0);
 608                                 byte |= op << ((x & 3) << 1);
 609
 610                                 if (x % 4 == 3) {
 611                                         writeb(byte, dst + x / 4);
 612                                         byte = 0;
 613                                 }
 614                         }
 615                         if (x % 4) {
 616                                 writeb(byte, dst + x / 4);
 617                                 byte = 0;
 618                         }
 619
 620                         dst += pitch;
 621                 }
 622         }
 623
 624         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
 625
 626         return 0;
 627 }
 628 #endif
 629
 630 static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb)
 631 {
 632         /* DGCMdQempty -- 1 == command queue is empty */
 633         return reg_read(gfb, GLAMO_REG_LCD_STATUS1) & (1 << 15);
 634 }
 635
 636 /* call holding gfb->lock_cmd  when locking, until you unlock */
 637 int glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
 638 {
 639         int timeout = 2000000;
 640
 641         dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on);
 642         if (on) {
 643                 dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ",
 644                         __func__);
 645                 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
 646                         cpu_relax();
 647                 if (timeout < 0) {
 648                         printk(KERN_ERR"*************"
 649                                        "glamofb cmd_queue never got empty"
 650                                        "*************\n");
 651                         return -EIO;
 652                 }
 653                 dev_dbg(gfb->dev, "empty!\n");
 654
 655                 /* display the entire frame then switch to command */
 656                 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 657                           GLAMO_LCD_CMD_TYPE_DISP |
 658                           GLAMO_LCD_CMD_DATA_FIRE_VSYNC);
 659
 660                 /* wait until lcd idle */
 661                 dev_dbg(gfb->dev, "waiting for lcd idle: ");
 662                 timeout = 2000000;
 663                 while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) &&
 664                       (timeout--))
 665                         cpu_relax();
 666                 if (timeout < 0) {
 667                         printk(KERN_ERR"*************"
 668                                        "glamofb lcd never idle"
 669                                        "*************\n");
 670                         return -EIO;
 671                 }
 672
 673                 mdelay(100);
 674
 675                 dev_dbg(gfb->dev, "cmd mode entered\n");
 676
 677         } else {
 678                 /* RGB interface needs vsync/hsync */
 679                 if (reg_read(gfb, GLAMO_REG_LCD_MODE3) & GLAMO_LCD_MODE3_RGB)
 680                         reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 681                                   GLAMO_LCD_CMD_TYPE_DISP |
 682                                   GLAMO_LCD_CMD_DATA_DISP_SYNC);
 683
 684                 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 685                           GLAMO_LCD_CMD_TYPE_DISP |
 686                           GLAMO_LCD_CMD_DATA_DISP_FIRE);
 687         }
 688
 689         return 0;
 690 }
 691 EXPORT_SYMBOL_GPL(glamofb_cmd_mode);
 692
 693
 694 int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val)
 695 {
 696         int timeout = 200000;
 697
 698         dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n", __func__);
 699         while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
 700                 yield();
 701         if (timeout < 0) {
 702                 printk(KERN_ERR"*************"
 703                                 "glamofb cmd_queue never got empty"
 704                                 "*************\n");
 705                 return 1;
 706         }
 707         dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val);
 708
 709         reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val);
 710
 711         return 0;
 712 }
 713 EXPORT_SYMBOL_GPL(glamofb_cmd_write);
 714
 715 static struct fb_ops glamofb_ops = {
 716         .owner          = THIS_MODULE,
 717         .fb_check_var   = glamofb_check_var,
 718         .fb_pan_display = glamofb_pan_display,
 719         .fb_set_par     = glamofb_set_par,
 720         .fb_blank       = glamofb_blank,
 721         .fb_setcolreg   = glamofb_setcolreg,
 722         .fb_ioctl = glamofb_ioctl,
 723 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 724         .fb_cursor      = glamofb_cursor,
 725 #endif
 726         .fb_fillrect    = cfb_fillrect,
 727         .fb_copyarea    = cfb_copyarea,
 728         .fb_imageblit   = cfb_imageblit,
 729 };
 730
 731 static int glamofb_init_regs(struct glamofb_handle *glamo)
 732 {
 733         struct fb_info *info = glamo->fb;
 734
 735         glamofb_check_var(&info->var, info);
 736         glamofb_run_script(glamo, glamo_regs, ARRAY_SIZE(glamo_regs));
 737         glamofb_set_par(info);
 738
 739         return 0;
 740 }
 741
 742 static int __init glamofb_probe(struct platform_device *pdev)
 743 {
 744         int rc = -EIO;
 745         struct fb_info *fbinfo;
 746         struct glamofb_handle *glamofb;
 747         struct glamo_core *core = dev_get_drvdata(pdev->dev.parent);
 748         struct glamo_fb_platform_data *mach_info;
 749
 750         printk(KERN_INFO "SMEDIA Glamo frame buffer driver (C) 2007 "
 751                 "Openmoko, Inc.\n");
 752
 753         if (!core->pdata || !core->pdata->fb_data)
 754                 return -ENOENT;
 755
 756
 757         fbinfo = framebuffer_alloc(sizeof(struct glamofb_handle), &pdev->dev);
 758         if (!fbinfo)
 759                 return -ENOMEM;
 760
 761
 762         glamofb = fbinfo->par;
 763         glamofb->fb = fbinfo;
 764         glamofb->dev = &pdev->dev;
 765
 766         glamofb->blank_mode = FB_BLANK_POWERDOWN;
 767
 768         strcpy(fbinfo->fix.id, "SMedia Glamo");
 769
 770         glamofb->reg = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 771                                                     "glamo-fb-regs");
 772         if (!glamofb->reg) {
 773                 dev_err(&pdev->dev, "platform device with no registers?\n");
 774                 rc = -ENOENT;
 775                 goto out_free;
 776         }
 777
 778         glamofb->fb_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 779                                                         "glamo-fb-mem");
 780         if (!glamofb->fb_res) {
 781                 dev_err(&pdev->dev, "platform device with no memory ?\n");
 782                 rc = -ENOENT;
 783                 goto out_free;
 784         }
 785
 786         glamofb->reg = request_mem_region(glamofb->reg->start,
 787                                           resource_size(glamofb->reg), pdev->name);
 788         if (!glamofb->reg) {
 789                 dev_err(&pdev->dev, "failed to request mmio region\n");
 790                 goto out_free;
 791         }
 792
 793         glamofb->fb_res = request_mem_region(glamofb->fb_res->start,
 794                                              resource_size(glamofb->fb_res),
 795                                              pdev->name);
 796         if (!glamofb->fb_res) {
 797                 dev_err(&pdev->dev, "failed to request vram region\n");
 798                 goto out_release_reg;
 799         }
 800
 801         /* we want to remap only the registers required for this core
 802          * driver. */
 803         glamofb->base = ioremap_nocache(glamofb->reg->start, resource_size(glamofb->reg));
 804         if (!glamofb->base) {
 805                 dev_err(&pdev->dev, "failed to ioremap() mmio memory\n");
 806                 goto out_release_fb;
 807         }
 808
 809         fbinfo->fix.smem_start = (unsigned long) glamofb->fb_res->start;
 810         fbinfo->fix.smem_len = (__u32) resource_size(glamofb->fb_res);
 811
 812         fbinfo->screen_base = ioremap(glamofb->fb_res->start,
 813                                        resource_size(glamofb->fb_res));
 814         if (!fbinfo->screen_base) {
 815                 dev_err(&pdev->dev, "failed to ioremap() vram memory\n");
 816                 goto out_release_fb;
 817         }
 818         glamofb->cursor_addr = fbinfo->screen_base + 0x12C000;
 819
 820         platform_set_drvdata(pdev, glamofb);
 821
 822         mach_info = core->pdata->fb_data;
 823         glamofb->core = core;
 824         glamofb->mach_info = mach_info;
 825
 826         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 827         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 828         fbinfo->fix.type_aux = 0;
 829         fbinfo->fix.xpanstep = 0;
 830         fbinfo->fix.ypanstep = 0;
 831         fbinfo->fix.ywrapstep = 0;
 832         fbinfo->fix.accel = FB_ACCEL_GLAMO;
 833
 834
 835         fbinfo->fbops = &glamofb_ops;
 836         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 837         fbinfo->pseudo_palette = &glamofb->pseudo_pal;
 838
 839         fbinfo->mode = mach_info->modes;
 840         fb_videomode_to_var(&fbinfo->var, fbinfo->mode);
 841         fbinfo->var.bits_per_pixel = 16;
 842         fbinfo->var.nonstd = 0;
 843         fbinfo->var.activate = FB_ACTIVATE_NOW;
 844         fbinfo->var.height = mach_info->height;
 845         fbinfo->var.width = mach_info->width;
 846         fbinfo->var.accel_flags = 0;
 847         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 848
 849         glamo_engine_enable(core, GLAMO_ENGINE_LCD);
 850         glamo_engine_reset(core, GLAMO_ENGINE_LCD);
 851         glamofb->output_enabled = 1;
 852         glamofb->mode_set = 1;
 853
 854         dev_info(&pdev->dev, "spin_lock_init\n");
 855         spin_lock_init(&glamofb->lock_cmd);
 856         glamofb_init_regs(glamofb);
 857 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 858         glamofb_cursor_onoff(glamofb, 1);
 859 #endif
 860
 861         fb_videomode_to_modelist(mach_info->modes, mach_info->num_modes,
 862                                  &fbinfo->modelist);
 863
 864         rc = register_framebuffer(fbinfo);
 865         if (rc < 0) {
 866                 dev_err(&pdev->dev, "failed to register framebuffer\n");
 867                 goto out_unmap_fb;
 868         }
 869
 870         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 871                 fbinfo->node, fbinfo->fix.id);
 872
 873         return 0;
 874
 875 out_unmap_fb:
 876         iounmap(fbinfo->screen_base);
 877         iounmap(glamofb->base);
 878 out_release_fb:
 879         release_mem_region(glamofb->fb_res->start, resource_size(glamofb->fb_res));
 880 out_release_reg:
 881         release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
 882 out_free:
 883         framebuffer_release(fbinfo);
 884         return rc;
 885 }
 886
 887 static int glamofb_remove(struct platform_device *pdev)
 888 {
 889         struct glamofb_handle *glamofb = platform_get_drvdata(pdev);
 890
 891         platform_set_drvdata(pdev, NULL);
 892         iounmap(glamofb->base);
 893         release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
 894         kfree(glamofb);
 895
 896         return 0;
 897 }
 898
 899 #ifdef CONFIG_PM
 900
 901 static int glamofb_suspend(struct device *dev)
 902 {
 903         struct glamofb_handle *gfb = dev_get_drvdata(dev);
 904
 905     acquire_console_sem();
 906         fb_set_suspend(gfb->fb, 1);
 907         release_console_sem();
 908
 909         /* seriously -- nobody is allowed to touch glamo memory when we
 910          * are suspended or we lock on nWAIT
 911          */
 912         /* iounmap(gfb->fb->screen_base); */
 913
 914         return 0;
 915 }
 916
 917 static int glamofb_resume(struct device *dev)
 918 {
 919         struct glamofb_handle *gfb = dev_get_drvdata(dev);
 920
 921         /* OK let's allow framebuffer ops again */
 922         /* gfb->fb->screen_base = ioremap(gfb->fb_res->start,
 923                                        resource_size(gfb->fb_res)); */
 924         glamo_engine_enable(gfb->core, GLAMO_ENGINE_LCD);
 925         glamo_engine_reset(gfb->core, GLAMO_ENGINE_LCD);
 926
 927         glamofb_init_regs(gfb);
 928 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 929         glamofb_cursor_onoff(gfb, 1);
 930 #endif
 931
 932     acquire_console_sem();
 933         fb_set_suspend(gfb->fb, 0);
 934         release_console_sem();
 935
 936         return 0;
 937 }
 938
 939 static struct dev_pm_ops glamofb_pm_ops = {
 940         .suspend = glamofb_suspend,
 941         .resume = glamofb_resume,
 942 };
 943
 944 #define GLAMOFB_PM_OPS (&glamofb_pm_ops)
 945
 946 #else
 947 #define GLAMOFB_PM_OPS NULL
 948 #endif
 949
 950 static struct platform_driver glamofb_driver = {
 951         .probe          = glamofb_probe,
 952         .remove         = glamofb_remove,
 953         .driver         = {
 954                 .name   = "glamo-fb",
 955                 .owner  = THIS_MODULE,
 956                 .pm     = GLAMOFB_PM_OPS
 957         },
 958 };
 959
 960 static int __devinit glamofb_init(void)
 961 {
 962         return platform_driver_register(&glamofb_driver);
 963 }
 964
 965 static void __exit glamofb_cleanup(void)
 966 {
 967         platform_driver_unregister(&glamofb_driver);
 968 }
 969
 970 module_init(glamofb_init);
 971 module_exit(glamofb_cleanup);
 972
 973 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
 974 MODULE_DESCRIPTION("Smedia Glamo 336x/337x framebuffer driver");
 975 MODULE_LICENSE("GPL");