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