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
  65 #define RESSIZE(ressource) (((ressource)->end - (ressource)->start)+1)
  66
  67 struct glamofb_handle {
  68         struct fb_info *fb;
  69         struct device *dev;
  70         struct resource *reg;
  71         struct resource *fb_res;
  72         char __iomem *base;
  73         struct glamofb_platform_data *mach_info;
  74         char __iomem *cursor_addr;
  75         int cursor_on;
  76         u_int32_t pseudo_pal[16];
  77         spinlock_t lock_cmd;
  78         int angle;      /* Current rotation angle */
  79         int blank_mode;
  80 };
  81
  82 /* 'sibling' spi device for lcm init */
  83 static struct platform_device glamo_spi_dev = {
  84         .name           = "glamo-lcm-spi",
  85 };
  86
  87
  88 static int reg_read(struct glamofb_handle *glamo,
  89                            u_int16_t reg)
  90 {
  91         int i = 0;
  92
  93         for (i = 0; i != 2; i++)
  94                 nop();
  95
  96         return readw(glamo->base + reg);
  97 }
  98
  99 static void reg_write(struct glamofb_handle *glamo,
 100                              u_int16_t reg, u_int16_t val)
 101 {
 102         int i = 0;
 103
 104         for (i = 0; i != 2; i++)
 105                 nop();
 106
 107         writew(val, glamo->base + reg);
 108 }
 109
 110 static struct glamo_script glamo_regs[] = {
 111         { GLAMO_REG_LCD_MODE1, 0x0020 },
 112         /* no display rotation, no hardware cursor, no dither, no gamma,
 113          * no retrace flip, vsync low-active, hsync low active,
 114          * no TVCLK, no partial display, hw dest color from fb,
 115          * no partial display mode, LCD1, software flip,  */
 116         { GLAMO_REG_LCD_MODE2, 0x9020 },
 117           /* video flip, no ptr, no ptr, dhclk off,
 118            * normal mode,  no cpuif,
 119            * res, serial msb first, single fb, no fr ctrl,
 120            * cpu if bits all zero, no crc
 121            * 0000 0000 0010  0000 */
 122         { GLAMO_REG_LCD_MODE3, 0x0b40 },
 123           /* src data rgb565, res, 18bit rgb666
 124            * 000 01 011 0100 0000 */
 125         { GLAMO_REG_LCD_POLARITY, 0x440c },
 126           /* DE high active, no cpu/lcd if, cs0 force low, a0 low active,
 127            * np cpu if, 9bit serial data, sclk rising edge latch data
 128            * 01 00 0 100 0 000 01 0 0 */
 129         /* The following values assume 640*480@16bpp */
 130         { GLAMO_REG_LCD_A_BASE1, 0x0000 }, /* display A base address 15:0 */
 131         { GLAMO_REG_LCD_A_BASE2, 0x0000 }, /* display A base address 22:16 */
 132         { GLAMO_REG_LCD_B_BASE1, 0x6000 }, /* display B base address 15:0 */
 133         { GLAMO_REG_LCD_B_BASE2, 0x0009 }, /* display B base address 22:16 */
 134         { GLAMO_REG_LCD_CURSOR_BASE1, 0xC000 }, /* cursor base address 15:0 */
 135         { GLAMO_REG_LCD_CURSOR_BASE2, 0x0012 }, /* cursor base address 22:16 */
 136         { GLAMO_REG_LCD_COMMAND2, 0x0000 }, /* display page A */
 137 };
 138
 139 static int glamofb_run_script(struct glamofb_handle *glamo,
 140                                 struct glamo_script *script, int len)
 141 {
 142         int i;
 143
 144         if (glamo->mach_info->glamo->suspending) {
 145                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 146                                 "IGNORING glamofb_run_script while "
 147                                                                  "suspended\n");
 148                 return -EBUSY;
 149         }
 150
 151         for (i = 0; i < len; i++) {
 152                 struct glamo_script *line = &script[i];
 153
 154                 if (line->reg == 0xffff)
 155                         return 0;
 156                 else if (line->reg == 0xfffe)
 157                         msleep(line->val);
 158                 else
 159                         reg_write(glamo, script[i].reg, script[i].val);
 160         }
 161
 162         return 0;
 163 }
 164
 165 static int glamofb_check_var(struct fb_var_screeninfo *var,
 166                              struct fb_info *info)
 167 {
 168         struct glamofb_handle *glamo = info->par;
 169
 170         if (glamo->mach_info->glamo->suspending) {
 171                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 172                                 "IGNORING glamofb_check_var while "
 173                                                                  "suspended\n");
 174                 return -EBUSY;
 175         }
 176
 177         if (var->yres > glamo->mach_info->yres.max)
 178                 var->yres = glamo->mach_info->yres.max;
 179         else if (var->yres < glamo->mach_info->yres.min)
 180                 var->yres = glamo->mach_info->yres.min;
 181
 182         if (var->xres > glamo->mach_info->xres.max)
 183                 var->xres = glamo->mach_info->xres.max;
 184         else if (var->xres < glamo->mach_info->xres.min)
 185                 var->xres = glamo->mach_info->xres.min;
 186
 187         if (var->bits_per_pixel > glamo->mach_info->bpp.max)
 188                 var->bits_per_pixel = glamo->mach_info->bpp.max;
 189         else if (var->bits_per_pixel < glamo->mach_info->bpp.min)
 190                 var->bits_per_pixel = glamo->mach_info->bpp.min;
 191
 192         /* FIXME: set rgb positions */
 193         switch (var->bits_per_pixel) {
 194         case 16:
 195                 switch (reg_read(glamo, GLAMO_REG_LCD_MODE3) & 0xc000) {
 196                 case GLAMO_LCD_SRC_RGB565:
 197                         var->red.offset         = 11;
 198                         var->green.offset       = 5;
 199                         var->blue.offset        = 0;
 200                         var->red.length         = 5;
 201                         var->green.length       = 6;
 202                         var->blue.length        = 5;
 203                         var->transp.length      = 0;
 204                         break;
 205                 case GLAMO_LCD_SRC_ARGB1555:
 206                         var->transp.offset      = 15;
 207                         var->red.offset         = 10;
 208                         var->green.offset       = 5;
 209                         var->blue.offset        = 0;
 210                         var->transp.length      = 1;
 211                         var->red.length         = 5;
 212                         var->green.length       = 5;
 213                         var->blue.length        = 5;
 214                         break;
 215                 case GLAMO_LCD_SRC_ARGB4444:
 216                         var->transp.offset      = 12;
 217                         var->red.offset         = 8;
 218                         var->green.offset       = 4;
 219                         var->blue.offset        = 0;
 220                         var->transp.length      = 4;
 221                         var->red.length         = 4;
 222                         var->green.length       = 4;
 223                         var->blue.length        = 4;
 224                         break;
 225                 }
 226                 break;
 227         case 24:
 228         case 32:
 229         default:
 230                 /* The Smedia Glamo doesn't support anything but 16bit color */
 231                 printk(KERN_ERR
 232                        "Smedia driver does not [yet?] support 24/32bpp\n");
 233                 return -EINVAL;
 234         }
 235
 236         return 0;
 237 }
 238
 239 static void reg_set_bit_mask(struct glamofb_handle *glamo,
 240                              u_int16_t reg, u_int16_t mask,
 241                              u_int16_t val)
 242 {
 243         u_int16_t tmp;
 244
 245         val &= mask;
 246
 247         tmp = reg_read(glamo, reg);
 248         tmp &= ~mask;
 249         tmp |= val;
 250         reg_write(glamo, reg, tmp);
 251 }
 252
 253 #define GLAMO_LCD_WIDTH_MASK 0x03FF
 254 #define GLAMO_LCD_HEIGHT_MASK 0x03FF
 255 #define GLAMO_LCD_PITCH_MASK 0x07FE
 256 #define GLAMO_LCD_HV_TOTAL_MASK 0x03FF
 257 #define GLAMO_LCD_HV_RETR_START_MASK 0x03FF
 258 #define GLAMO_LCD_HV_RETR_END_MASK 0x03FF
 259 #define GLAMO_LCD_HV_RETR_DISP_START_MASK 0x03FF
 260 #define GLAMO_LCD_HV_RETR_DISP_END_MASK 0x03FF
 261
 262 enum orientation {ORIENTATION_PORTRAIT, ORIENTATION_LANDSCAPE};
 263
 264 /* the caller has to enxure lock_cmd is held and we are in cmd mode */
 265 static void __rotate_lcd(struct glamofb_handle *glamo, __u32 rotation)
 266 {
 267         int glamo_rot;
 268
 269         if (glamo->mach_info->glamo->suspending) {
 270                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 271                                 "IGNORING rotate_lcd while "
 272                                                                  "suspended\n");
 273                 return;
 274         }
 275
 276         switch (rotation) {
 277         case FB_ROTATE_UR:
 278                 glamo_rot = GLAMO_LCD_ROT_MODE_0;
 279                 glamo->angle = 0;
 280                 break;
 281         case FB_ROTATE_CW:
 282                 glamo_rot = GLAMO_LCD_ROT_MODE_90;
 283                 glamo->angle = 90;
 284                 break;
 285         case FB_ROTATE_UD:
 286                 glamo_rot = GLAMO_LCD_ROT_MODE_180;
 287                 glamo->angle = 180;
 288                 break;
 289         case FB_ROTATE_CCW:
 290                 glamo_rot = GLAMO_LCD_ROT_MODE_270;
 291                 glamo->angle = 270;
 292                 break;
 293         default:
 294                 glamo->angle = 0;
 295                 glamo_rot = GLAMO_LCD_ROT_MODE_0;
 296                 break;
 297         }
 298
 299         reg_set_bit_mask(glamo,
 300                          GLAMO_REG_LCD_WIDTH,
 301                          GLAMO_LCD_ROT_MODE_MASK,
 302                          glamo_rot);
 303         reg_set_bit_mask(glamo,
 304                          GLAMO_REG_LCD_MODE1,
 305                          GLAMO_LCD_MODE1_ROTATE_EN,
 306                          (glamo_rot != GLAMO_LCD_ROT_MODE_0) ?
 307                                  GLAMO_LCD_MODE1_ROTATE_EN : 0);
 308 }
 309
 310 static enum orientation get_orientation(struct fb_var_screeninfo *var)
 311 {
 312         if (var->xres <= var->yres)
 313                 return ORIENTATION_PORTRAIT;
 314
 315         return ORIENTATION_LANDSCAPE;
 316 }
 317
 318 static int will_orientation_change(struct fb_var_screeninfo *var)
 319 {
 320         enum orientation orient = get_orientation(var);
 321
 322         switch (orient) {
 323         case ORIENTATION_LANDSCAPE:
 324                 if (var->rotate == FB_ROTATE_UR || var->rotate == FB_ROTATE_UD)
 325                         return 1;
 326                 break;
 327         case ORIENTATION_PORTRAIT:
 328                 if (var->rotate == FB_ROTATE_CW || var->rotate == FB_ROTATE_CCW)
 329                         return 1;
 330                 break;
 331         }
 332         return 0;
 333 }
 334
 335 static void glamofb_update_lcd_controller(struct glamofb_handle *glamo,
 336                                           struct fb_var_screeninfo *var)
 337 {
 338         int sync, bp, disp, fp, total, xres, yres, pitch;
 339         int uninitialized_var(orientation_changing);
 340         unsigned long flags;
 341
 342         if (!glamo || !var)
 343                 return;
 344
 345         if (glamo->mach_info->glamo->suspending) {
 346                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 347                                 "IGNORING glamofb_update_lcd_controller while "
 348                                                                  "suspended\n");
 349                 return;
 350         }
 351
 352         dev_dbg(&glamo->mach_info->glamo->pdev->dev,
 353                           "glamofb_update_lcd_controller spin_lock_irqsave\n");
 354         spin_lock_irqsave(&glamo->lock_cmd, flags);
 355
 356         if (glamofb_cmd_mode(glamo, 1))
 357                 goto out_unlock;
 358
 359 /*      if (var->pixclock)
 360                 glamo_engine_reclock(glamo->mach_info->glamo,
 361                                      GLAMO_ENGINE_LCD,
 362                                      var->pixclock);*/
 363
 364         xres = var->xres;
 365         yres = var->yres;
 366
 367     orientation_changing = will_orientation_change(var);
 368         /* Adjust the pitch according to new orientation to come. */
 369         if (orientation_changing)
 370                 pitch = var->yres * var->bits_per_pixel / 8;
 371         else
 372                 pitch = var->xres * var->bits_per_pixel / 8;
 373
 374         reg_set_bit_mask(glamo,
 375                          GLAMO_REG_LCD_WIDTH,
 376                          GLAMO_LCD_WIDTH_MASK,
 377                          xres);
 378         reg_set_bit_mask(glamo,
 379                          GLAMO_REG_LCD_HEIGHT,
 380                          GLAMO_LCD_HEIGHT_MASK,
 381                          yres);
 382         reg_set_bit_mask(glamo,
 383                          GLAMO_REG_LCD_PITCH,
 384                          GLAMO_LCD_PITCH_MASK,
 385                          pitch);
 386
 387         /* honour the rotation request */
 388         __rotate_lcd(glamo, var->rotate);
 389
 390         if (orientation_changing) {
 391                 var->xres_virtual = yres;
 392                 var->xres = yres;
 393                 var->xres_virtual *= 2;
 394                 var->yres_virtual = xres;
 395                 var->yres = xres;
 396         } else {
 397                 var->xres_virtual = xres;
 398                 var->yres_virtual = yres;
 399                 var->yres_virtual *= 2;
 400         }
 401
 402         /* update scannout timings */
 403         sync = 0;
 404         bp = sync + var->hsync_len;
 405         disp = bp + var->left_margin;
 406         fp = disp + xres;
 407         total = fp + var->right_margin;
 408
 409         reg_set_bit_mask(glamo, GLAMO_REG_LCD_HORIZ_TOTAL,
 410                          GLAMO_LCD_HV_TOTAL_MASK, total);
 411         reg_set_bit_mask(glamo, GLAMO_REG_LCD_HORIZ_RETR_START,
 412                          GLAMO_LCD_HV_RETR_START_MASK, sync);
 413         reg_set_bit_mask(glamo, GLAMO_REG_LCD_HORIZ_RETR_END,
 414                          GLAMO_LCD_HV_RETR_END_MASK, bp);
 415         reg_set_bit_mask(glamo, GLAMO_REG_LCD_HORIZ_DISP_START,
 416                           GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
 417         reg_set_bit_mask(glamo, GLAMO_REG_LCD_HORIZ_DISP_END,
 418                          GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
 419
 420         sync = 0;
 421         bp = sync + var->vsync_len;
 422         disp = bp + var->upper_margin;
 423         fp = disp + yres;
 424         total = fp + var->lower_margin;
 425
 426         reg_set_bit_mask(glamo, GLAMO_REG_LCD_VERT_TOTAL,
 427                          GLAMO_LCD_HV_TOTAL_MASK, total);
 428         reg_set_bit_mask(glamo, GLAMO_REG_LCD_VERT_RETR_START,
 429                           GLAMO_LCD_HV_RETR_START_MASK, sync);
 430         reg_set_bit_mask(glamo, GLAMO_REG_LCD_VERT_RETR_END,
 431                          GLAMO_LCD_HV_RETR_END_MASK, bp);
 432         reg_set_bit_mask(glamo, GLAMO_REG_LCD_VERT_DISP_START,
 433                          GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
 434         reg_set_bit_mask(glamo, GLAMO_REG_LCD_VERT_DISP_END,
 435                          GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
 436
 437         glamofb_cmd_mode(glamo, 0);
 438
 439 out_unlock:
 440         dev_dbg(&glamo->mach_info->glamo->pdev->dev,
 441                       "glamofb_update_lcd_controller spin_unlock_irqrestore\n");
 442         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
 443 }
 444
 445 static int glamofb_pan_display(struct fb_var_screeninfo *var,
 446                 struct fb_info *info)
 447 {
 448         struct glamofb_handle *glamo = info->par;
 449         u_int16_t page = var->yoffset / glamo->mach_info->yres.defval;
 450         reg_write(glamo, GLAMO_REG_LCD_COMMAND2, page);
 451
 452         return 0;
 453 }
 454
 455 static int glamofb_set_par(struct fb_info *info)
 456 {
 457         struct glamofb_handle *glamo = info->par;
 458         struct fb_var_screeninfo *var = &info->var;
 459
 460         if (glamo->mach_info->glamo->suspending) {
 461                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 462                                 "IGNORING glamofb_set_par while "
 463                                                                  "suspended\n");
 464                 return -EBUSY;
 465         }
 466
 467         switch (var->bits_per_pixel) {
 468         case 16:
 469                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 470                 break;
 471         default:
 472                 printk("Smedia driver doesn't support != 16bpp\n");
 473                 return -EINVAL;
 474         }
 475
 476         info->fix.line_length = (var->xres * var->bits_per_pixel) / 8;
 477
 478         glamofb_update_lcd_controller(glamo, var);
 479
 480         return 0;
 481 }
 482
 483
 484 static void notify_blank(struct fb_info *info, int blank_mode)
 485 {
 486         struct fb_event event;
 487
 488         event.info = info;
 489         event.data = &blank_mode;
 490         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
 491 }
 492
 493
 494 static int glamofb_blank(int blank_mode, struct fb_info *info)
 495 {
 496         struct glamofb_handle *gfb = info->par;
 497         struct glamo_core *gcore = gfb->mach_info->glamo;
 498
 499         dev_dbg(gfb->dev, "glamofb_blank(%u)\n", blank_mode);
 500
 501         switch (blank_mode) {
 502         case FB_BLANK_VSYNC_SUSPEND:
 503         case FB_BLANK_HSYNC_SUSPEND:
 504                 /* FIXME: add pdata hook/flag to indicate whether
 505                  * we should already switch off pixel clock here */
 506                 break;
 507         case FB_BLANK_POWERDOWN:
 508                 /* Simulating FB_BLANK_NORMAL allow turning off backlight */
 509                 if (gfb->blank_mode != FB_BLANK_NORMAL)
 510                         notify_blank(info, FB_BLANK_NORMAL);
 511
 512                 /* LCM need notification before pixel clock is stopped */
 513                 notify_blank(info, blank_mode);
 514
 515                 /* disable the pixel clock */
 516                 glamo_engine_clkreg_set(gcore, GLAMO_ENGINE_LCD,
 517                                         GLAMO_CLOCK_LCD_EN_DCLK, 0);
 518                 gfb->blank_mode = blank_mode;
 519                 break;
 520         case FB_BLANK_UNBLANK:
 521         case FB_BLANK_NORMAL:
 522                 /* enable the pixel clock if off */
 523                 if (gfb->blank_mode == FB_BLANK_POWERDOWN)
 524                         glamo_engine_clkreg_set(gcore,
 525                                         GLAMO_ENGINE_LCD,
 526                                         GLAMO_CLOCK_LCD_EN_DCLK,
 527                                         GLAMO_CLOCK_LCD_EN_DCLK);
 528
 529                 notify_blank(info, blank_mode);
 530                 gfb->blank_mode = blank_mode;
 531                 break;
 532         }
 533
 534         /* FIXME: once we have proper clock management in glamo-core,
 535          * we can determine if other units need MCLK1 or the PLL, and
 536          * disable it if not used. */
 537         return 0;
 538 }
 539
 540 static inline unsigned int chan_to_field(unsigned int chan,
 541                                          struct fb_bitfield *bf)
 542 {
 543         chan &= 0xffff;
 544         chan >>= 16 - bf->length;
 545         return chan << bf->offset;
 546 }
 547
 548 static int glamofb_setcolreg(unsigned regno,
 549                              unsigned red, unsigned green, unsigned blue,
 550                              unsigned transp, struct fb_info *info)
 551 {
 552         struct glamofb_handle *glamo = info->par;
 553         unsigned int val;
 554
 555         if (glamo->mach_info->glamo->suspending) {
 556                 dev_err(&glamo->mach_info->glamo->pdev->dev,
 557                                 "IGNORING glamofb_set_par while "
 558                                                                  "suspended\n");
 559                 return -EBUSY;
 560         }
 561
 562         switch (glamo->fb->fix.visual) {
 563         case FB_VISUAL_TRUECOLOR:
 564         case FB_VISUAL_DIRECTCOLOR:
 565                 /* true-colour, use pseuo-palette */
 566
 567                 if (regno < 16) {
 568                         u32 *pal = glamo->fb->pseudo_palette;
 569
 570                         val  = chan_to_field(red, &glamo->fb->var.red);
 571                         val |= chan_to_field(green, &glamo->fb->var.green);
 572                         val |= chan_to_field(blue, &glamo->fb->var.blue);
 573
 574                         pal[regno] = val;
 575                 };
 576                 break;
 577         default:
 578                 return 1; /* unknown type */
 579         }
 580
 581         return 0;
 582 }
 583
 584 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 585 static inline void glamofb_vsync_wait(struct glamofb_handle *glamo,
 586                 int line, int size, int range)
 587 {
 588         int count[2];
 589
 590         do {
 591                 count[0] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
 592                 count[1] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
 593         } while (count[0] != count[1] ||
 594                         (line < count[0] + range &&
 595                          size > count[0] - range) ||
 596                         count[0] < range * 2);
 597 }
 598
 599 /*
 600  * Enable/disable the hardware cursor mode altogether
 601  * (for blinking and such, use glamofb_cursor()).
 602  */
 603 static void glamofb_cursor_onoff(struct glamofb_handle *glamo, int on)
 604 {
 605         int y, size;
 606
 607         if (glamo->cursor_on) {
 608                 y = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_POS);
 609                 size = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE);
 610
 611                 glamofb_vsync_wait(glamo, y, size, 30);
 612         }
 613
 614         reg_set_bit_mask(glamo, GLAMO_REG_LCD_MODE1,
 615                         GLAMO_LCD_MODE1_CURSOR_EN,
 616                         on ? GLAMO_LCD_MODE1_CURSOR_EN : 0);
 617         glamo->cursor_on = on;
 618
 619         /* Hide the cursor by default */
 620         reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE, 0);
 621 }
 622
 623 static int glamofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 624 {
 625         struct glamofb_handle *glamo = info->par;
 626         unsigned long flags;
 627
 628         spin_lock_irqsave(&glamo->lock_cmd, flags);
 629
 630         reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE,
 631                         cursor->enable ? cursor->image.width : 0);
 632
 633         if (cursor->set & FB_CUR_SETPOS) {
 634                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_POS,
 635                           cursor->image.dx);
 636                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_POS,
 637                           cursor->image.dy);
 638         }
 639
 640         if (cursor->set & FB_CUR_SETCMAP) {
 641                 uint16_t fg = glamo->pseudo_pal[cursor->image.fg_color];
 642                 uint16_t bg = glamo->pseudo_pal[cursor->image.bg_color];
 643
 644                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_FG_COLOR, fg);
 645                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_BG_COLOR, bg);
 646                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_DST_COLOR, fg);
 647         }
 648
 649         if (cursor->set & FB_CUR_SETHOT)
 650                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PRESET,
 651                                 (cursor->hot.x << 8) | cursor->hot.y);
 652
 653         if ((cursor->set & FB_CUR_SETSIZE) ||
 654             (cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE))) {
 655                 int x, y, pitch, op;
 656                 const uint8_t *pcol = cursor->image.data;
 657                 const uint8_t *pmsk = cursor->mask;
 658                 uint8_t __iomem *dst = glamo->cursor_addr;
 659                 uint8_t dcol = 0;
 660                 uint8_t dmsk = 0;
 661                 uint8_t byte = 0;
 662
 663                 if (cursor->image.depth > 1) {
 664                         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
 665                         return -EINVAL;
 666                 }
 667
 668                 pitch = ((cursor->image.width + 7) >> 2) & ~1;
 669                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PITCH,
 670                         pitch);
 671                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE,
 672                         cursor->image.height);
 673
 674                 for (y = 0; y < cursor->image.height; y++) {
 675                         byte = 0;
 676                         for (x = 0; x < cursor->image.width; x++) {
 677                                 if ((x % 8) == 0) {
 678                                         dcol = *pcol++;
 679                                         dmsk = *pmsk++;
 680                                 } else {
 681                                         dcol >>= 1;
 682                                         dmsk >>= 1;
 683                                 }
 684
 685                                 if (cursor->rop == ROP_COPY)
 686                                         op = (dmsk & 1) ?
 687                                                 (dcol & 1) ? 1 : 3 : 0;
 688                                 else
 689                                         op = ((dmsk & 1) << 1) |
 690                                                 ((dcol & 1) << 0);
 691                                 byte |= op << ((x & 3) << 1);
 692
 693                                 if (x % 4 == 3) {
 694                                         writeb(byte, dst + x / 4);
 695                                         byte = 0;
 696                                 }
 697                         }
 698                         if (x % 4) {
 699                                 writeb(byte, dst + x / 4);
 700                                 byte = 0;
 701                         }
 702
 703                         dst += pitch;
 704                 }
 705         }
 706
 707         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
 708
 709         return 0;
 710 }
 711 #endif
 712
 713 static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb)
 714 {
 715         /* DGCMdQempty -- 1 == command queue is empty */
 716         return reg_read(gfb, GLAMO_REG_LCD_STATUS1) & (1 << 15);
 717 }
 718
 719 /* call holding gfb->lock_cmd  when locking, until you unlock */
 720 int glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
 721 {
 722         int timeout = 2000000;
 723
 724         if (gfb->mach_info->glamo->suspending) {
 725                 dev_err(&gfb->mach_info->glamo->pdev->dev,
 726                                 "IGNORING glamofb_cmd_mode while "
 727                                                                  "suspended\n");
 728                 return -EBUSY;
 729         }
 730
 731         dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on);
 732         if (on) {
 733                 dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ",
 734                         __func__);
 735                 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
 736                         /* yield() */;
 737                 if (timeout < 0) {
 738                         printk(KERN_ERR"*************"
 739                                        "glamofb cmd_queue never got empty"
 740                                        "*************\n");
 741                         return -EIO;
 742                 }
 743                 dev_dbg(gfb->dev, "empty!\n");
 744
 745                 /* display the entire frame then switch to command */
 746                 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 747                           GLAMO_LCD_CMD_TYPE_DISP |
 748                           GLAMO_LCD_CMD_DATA_FIRE_VSYNC);
 749
 750                 /* wait until lcd idle */
 751                 dev_dbg(gfb->dev, "waiting for lcd idle: ");
 752                 timeout = 2000000;
 753                 while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) &&
 754                       (timeout--))
 755                         /* yield() */;
 756                 if (timeout < 0) {
 757                         printk(KERN_ERR"*************"
 758                                        "glamofb lcd never idle"
 759                                        "*************\n");
 760                         return -EIO;
 761                 }
 762
 763                 mdelay(100);
 764
 765                 dev_dbg(gfb->dev, "cmd mode entered\n");
 766
 767         } else {
 768                 /* RGB interface needs vsync/hsync */
 769                 if (reg_read(gfb, GLAMO_REG_LCD_MODE3) & GLAMO_LCD_MODE3_RGB)
 770                         reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 771                                   GLAMO_LCD_CMD_TYPE_DISP |
 772                                   GLAMO_LCD_CMD_DATA_DISP_SYNC);
 773
 774                 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
 775                           GLAMO_LCD_CMD_TYPE_DISP |
 776                           GLAMO_LCD_CMD_DATA_DISP_FIRE);
 777         }
 778
 779         return 0;
 780 }
 781 EXPORT_SYMBOL_GPL(glamofb_cmd_mode);
 782
 783
 784 int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val)
 785 {
 786         int timeout = 200000;
 787
 788         if (gfb->mach_info->glamo->suspending) {
 789                 dev_err(&gfb->mach_info->glamo->pdev->dev,
 790                                 "IGNORING glamofb_cmd_write while "
 791                                                                  "suspended\n");
 792                 return -EBUSY;
 793         }
 794
 795         dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n", __func__);
 796         while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
 797                 yield();
 798         if (timeout < 0) {
 799                 printk(KERN_ERR"*************"
 800                                 "glamofb cmd_queue never got empty"
 801                                 "*************\n");
 802                 return 1;
 803         }
 804         dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val);
 805
 806         reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val);
 807
 808         return 0;
 809 }
 810 EXPORT_SYMBOL_GPL(glamofb_cmd_write);
 811
 812 static struct fb_ops glamofb_ops = {
 813         .owner          = THIS_MODULE,
 814         .fb_check_var   = glamofb_check_var,
 815         .fb_pan_display = glamofb_pan_display,
 816         .fb_set_par     = glamofb_set_par,
 817         .fb_blank       = glamofb_blank,
 818         .fb_setcolreg   = glamofb_setcolreg,
 819 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 820         .fb_cursor      = glamofb_cursor,
 821 #endif
 822         .fb_fillrect    = cfb_fillrect,
 823         .fb_copyarea    = cfb_copyarea,
 824         .fb_imageblit   = cfb_imageblit,
 825 };
 826
 827 static int glamofb_init_regs(struct glamofb_handle *glamo)
 828 {
 829         struct fb_info *info = glamo->fb;
 830
 831         glamofb_check_var(&info->var, info);
 832         glamofb_run_script(glamo, glamo_regs, ARRAY_SIZE(glamo_regs));
 833         glamofb_set_par(info);
 834
 835         return 0;
 836 }
 837
 838 static int __init glamofb_probe(struct platform_device *pdev)
 839 {
 840         int rc = -EIO;
 841         struct fb_info *fbinfo;
 842         struct glamofb_handle *glamofb;
 843         struct glamofb_platform_data *mach_info = pdev->dev.platform_data;
 844
 845         printk(KERN_INFO "SMEDIA Glamo frame buffer driver (C) 2007 "
 846                 "Openmoko, Inc.\n");
 847
 848         fbinfo = framebuffer_alloc(sizeof(struct glamofb_handle), &pdev->dev);
 849         if (!fbinfo)
 850                 return -ENOMEM;
 851
 852         glamofb = fbinfo->par;
 853         glamofb->fb = fbinfo;
 854         glamofb->dev = &pdev->dev;
 855
 856         glamofb->angle = 0;
 857         glamofb->blank_mode = FB_BLANK_POWERDOWN;
 858
 859         strcpy(fbinfo->fix.id, "SMedia Glamo");
 860
 861         glamofb->reg = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 862                                                     "glamo-fb-regs");
 863         if (!glamofb->reg) {
 864                 dev_err(&pdev->dev, "platform device with no registers?\n");
 865                 rc = -ENOENT;
 866                 goto out_free;
 867         }
 868
 869         glamofb->fb_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 870                                                         "glamo-fb-mem");
 871         if (!glamofb->fb_res) {
 872                 dev_err(&pdev->dev, "platform device with no memory ?\n");
 873                 rc = -ENOENT;
 874                 goto out_free;
 875         }
 876
 877         glamofb->reg = request_mem_region(glamofb->reg->start,
 878                                           RESSIZE(glamofb->reg), pdev->name);
 879         if (!glamofb->reg) {
 880                 dev_err(&pdev->dev, "failed to request mmio region\n");
 881                 goto out_free;
 882         }
 883
 884         glamofb->fb_res = request_mem_region(glamofb->fb_res->start,
 885                                              mach_info->fb_mem_size,
 886                                              pdev->name);
 887         if (!glamofb->fb_res) {
 888                 dev_err(&pdev->dev, "failed to request vram region\n");
 889                 goto out_release_reg;
 890         }
 891
 892         /* we want to remap only the registers required for this core
 893          * driver. */
 894         glamofb->base = ioremap(glamofb->reg->start, RESSIZE(glamofb->reg));
 895         if (!glamofb->base) {
 896                 dev_err(&pdev->dev, "failed to ioremap() mmio memory\n");
 897                 goto out_release_fb;
 898         }
 899         fbinfo->fix.smem_start = (unsigned long) glamofb->fb_res->start;
 900         fbinfo->fix.smem_len = mach_info->fb_mem_size;
 901
 902         fbinfo->screen_base = ioremap(glamofb->fb_res->start,
 903                                        RESSIZE(glamofb->fb_res));
 904         if (!fbinfo->screen_base) {
 905                 dev_err(&pdev->dev, "failed to ioremap() vram memory\n");
 906                 goto out_release_fb;
 907         }
 908         glamofb->cursor_addr = fbinfo->screen_base + 0x12C000;
 909
 910         platform_set_drvdata(pdev, glamofb);
 911
 912         glamofb->mach_info = pdev->dev.platform_data;
 913
 914         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 915         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 916         fbinfo->fix.type_aux = 0;
 917         fbinfo->fix.xpanstep = 0;
 918         fbinfo->fix.ypanstep = mach_info->yres.defval;
 919         fbinfo->fix.ywrapstep = 0;
 920         fbinfo->fix.accel = FB_ACCEL_GLAMO;
 921
 922         fbinfo->var.nonstd = 0;
 923         fbinfo->var.activate = FB_ACTIVATE_NOW;
 924         fbinfo->var.height = mach_info->height;
 925         fbinfo->var.width = mach_info->width;
 926         fbinfo->var.accel_flags = 0;    /* FIXME */
 927         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 928
 929         fbinfo->fbops = &glamofb_ops;
 930         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 931         fbinfo->pseudo_palette = &glamofb->pseudo_pal;
 932
 933         fbinfo->var.xres = mach_info->xres.defval;
 934         fbinfo->var.xres_virtual = mach_info->xres.defval;
 935         fbinfo->var.yres = mach_info->yres.defval;
 936         fbinfo->var.yres_virtual = mach_info->yres.defval * 2;
 937         fbinfo->var.bits_per_pixel = mach_info->bpp.defval;
 938
 939         fbinfo->var.pixclock = mach_info->pixclock;
 940         fbinfo->var.left_margin = mach_info->left_margin;
 941         fbinfo->var.right_margin = mach_info->right_margin;
 942         fbinfo->var.upper_margin = mach_info->upper_margin;
 943         fbinfo->var.lower_margin = mach_info->lower_margin;
 944         fbinfo->var.hsync_len = mach_info->hsync_len;
 945         fbinfo->var.vsync_len = mach_info->vsync_len;
 946
 947         memset(fbinfo->screen_base, 0,
 948                         mach_info->xres.max *
 949                         mach_info->yres.max *
 950                         mach_info->bpp.max / 8);
 951
 952         glamo_engine_enable(mach_info->glamo, GLAMO_ENGINE_LCD);
 953         glamo_engine_reset(mach_info->glamo, GLAMO_ENGINE_LCD);
 954
 955         dev_info(&pdev->dev, "spin_lock_init\n");
 956         spin_lock_init(&glamofb->lock_cmd);
 957         glamofb_init_regs(glamofb);
 958 #ifdef CONFIG_MFD_GLAMO_HWACCEL
 959         glamofb_cursor_onoff(glamofb, 1);
 960 #endif
 961
 962 #ifdef CONFIG_MFD_GLAMO_FB_XGLAMO_WORKAROUND
 963         /* sysfs */
 964         rc = sysfs_create_group(&pdev->dev.kobj, &glamo_fb_attr_group);
 965         if (rc < 0) {
 966                 dev_err(&pdev->dev, "cannot create sysfs group\n");
 967                 goto out_unmap_fb;
 968         }
 969 #endif
 970
 971         rc = register_framebuffer(fbinfo);
 972         if (rc < 0) {
 973                 dev_err(&pdev->dev, "failed to register framebuffer\n");
 974                 goto out_unmap_fb;
 975         }
 976
 977         if (mach_info->spi_info) {
 978                 /* register the sibling spi device */
 979                 mach_info->spi_info->glamofb_handle = glamofb;
 980                 glamo_spi_dev.dev.parent = &pdev->dev;
 981                 glamo_spi_dev.dev.platform_data = mach_info->spi_info;
 982                 platform_device_register(&glamo_spi_dev);
 983         }
 984
 985         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 986                 fbinfo->node, fbinfo->fix.id);
 987
 988         return 0;
 989
 990 out_unmap_fb:
 991         iounmap(fbinfo->screen_base);
 992         iounmap(glamofb->base);
 993 out_release_fb:
 994         release_mem_region(glamofb->fb_res->start, RESSIZE(glamofb->fb_res));
 995 out_release_reg:
 996         release_mem_region(glamofb->reg->start, RESSIZE(glamofb->reg));
 997 out_free:
 998         framebuffer_release(fbinfo);
 999         return rc;
1000 }
1001
1002 static int glamofb_remove(struct platform_device *pdev)
1003 {
1004         struct glamofb_handle *glamofb = platform_get_drvdata(pdev);
1005
1006         platform_set_drvdata(pdev, NULL);
1007         iounmap(glamofb->base);
1008         release_mem_region(glamofb->reg->start, RESSIZE(glamofb->reg));
1009         kfree(glamofb);
1010
1011         return 0;
1012 }
1013
1014 #ifdef CONFIG_PM
1015
1016 static int glamofb_suspend(struct platform_device *pdev, pm_message_t state)
1017 {
1018         struct glamofb_handle *gfb = platform_get_drvdata(pdev);
1019
1020         /* we need to stop anything touching our framebuffer */
1021         fb_set_suspend(gfb->fb, 1);
1022
1023         /* seriously -- nobody is allowed to touch glamo memory when we
1024          * are suspended or we lock on nWAIT
1025          */
1026         /* iounmap(gfb->fb->screen_base); */
1027
1028         return 0;
1029 }
1030
1031 static int glamofb_resume(struct platform_device *pdev)
1032 {
1033         struct glamofb_handle *gfb = platform_get_drvdata(pdev);
1034         struct glamofb_platform_data *mach_info = pdev->dev.platform_data;
1035
1036         /* OK let's allow framebuffer ops again */
1037         /* gfb->fb->screen_base = ioremap(gfb->fb_res->start,
1038                                        RESSIZE(gfb->fb_res)); */
1039         glamo_engine_enable(mach_info->glamo, GLAMO_ENGINE_LCD);
1040         glamo_engine_reset(mach_info->glamo, GLAMO_ENGINE_LCD);
1041
1042         printk(KERN_ERR"spin_lock_init\n");
1043         spin_lock_init(&gfb->lock_cmd);
1044         glamofb_init_regs(gfb);
1045 #ifdef CONFIG_MFD_GLAMO_HWACCEL
1046         glamofb_cursor_onoff(gfb, 1);
1047 #endif
1048
1049         fb_set_suspend(gfb->fb, 0);
1050
1051         return 0;
1052 }
1053 #else
1054 #define glamofb_suspend NULL
1055 #define glamofb_resume  NULL
1056 #endif
1057
1058 static struct platform_driver glamofb_driver = {
1059         .probe          = glamofb_probe,
1060         .remove         = glamofb_remove,
1061         .suspend        = glamofb_suspend,
1062         .resume = glamofb_resume,
1063         .driver         = {
1064                 .name   = "glamo-fb",
1065                 .owner  = THIS_MODULE,
1066         },
1067 };
1068
1069 static int __devinit glamofb_init(void)
1070 {
1071         return platform_driver_register(&glamofb_driver);
1072 }
1073
1074 static void __exit glamofb_cleanup(void)
1075 {
1076         platform_driver_unregister(&glamofb_driver);
1077 }
1078
1079 module_init(glamofb_init);
1080 module_exit(glamofb_cleanup);
1081
1082 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
1083 MODULE_DESCRIPTION("Smedia Glamo 336x/337x framebuffer driver");
1084 MODULE_LICENSE("GPL");